JP5057369B2 - Seal structure of headrest insert - Google Patents

Description

  The present invention relates to a seal structure for a headrest insert in foam molding, and more particularly to a seal structure for a movable headrest insert among vehicle headrests.

  Among the vehicle headrests, there is a movable headrest that is attached so that the pillow portion can be tilted and moved with respect to a stay supported on the upper end of the seat back. The movable headrest has been pursued to have a functional and quality stable structure that allows the pillow part to move smoothly relative to the stay. At the same time, it is required to simplify the movable mechanism, to improve ease of manufacture, improve assembly workability, and reduce costs. And the proposal which responds to such a request | requirement has been made | formed (for example, patent document 1).

JP 2003-225137 A

Patent Document 1 states that “a stay including a pair of vertical support rod portions supported by a seat back and a horizontal support rod portion connecting the both vertical support rod portions, and maintaining a predetermined frictional force on the horizontal support rod portion. A plate fixed so as to be able to swing while being molded separately from the plate by a resin material, and fixed to the plate and covering at least a part of the plate and the stay, and moving the vertical support bar portion A headrest device including a cover having a space that allows the first cover, and the cover includes a first cover, a second cover, and a link portion that rotatably links the first cover and the second cover. In addition, a headrest device characterized in that the first cover and the second cover sandwich the stay and the plate is disclosed.
Specifically, a structure in which the stay 4 is sandwiched between the first cover 2A and the second cover 3A is disclosed as an insert as shown in FIG. 9 (cover in Patent Document 1). Some of the outer standing wall 23a concave section recessed frame 23 to the outer peripheral portion of the first cover 2A is making provided and depressions of the concave-shaped frame that halves formed into a bowl shape of the insert hole 23a ₁ is provided. On the other hand, a convex frame 33 that fits into the concave frame 23 is provided on the mating facing surface along the outer peripheral portion 31 of the second cover 3A, and a part of the convex frame 33 is cut off, so that the cut-out notch portion. A locking claw 35 is provided via 34 (FIG. 10). Then, the first and second covers 2A and 3A are inserted into the stay horizontal portion 41 and the upper end portion of the stay vertical portion 40 from the front and rear so as to be swingable with respect to the stay 4 and integrated. Is formed (FIG. 11). More specifically, after assembling the holding plate 5 (a plate in Patent Document 1) rotatably attached to the horizontal portion of the stay 4 to the boss 24 of the first cover 2A, the stay horizontal portion 41 and the stay vertical portion to the upper end portion 40, fitting the two insert halves article 2 by sandwiching from around, the projecting portion 35b is through-hole 23a ₁ of the locking claw 35 with convex frame 33 in a concave frame 23 is fitted Then, they are fitted and integrated (FIG. 12).

However, the insert with a stay thus completed has the following problems. The insert with a stay is then foam-molded after placing the insert in the headrest foam mold and embedded in the foam 6 as the pillow body as shown in FIG. there is a problem that enters into the insert from the fitting portion between the protruding portion 35b of the claws 35 and the through holes 23a _1.
10 to 13, in the fitting portion between the locking claw 35 and the through hole 23a ₁ , the locking claw 35 is deformed by its elastic force and fitted into the through hole 23a ₁ (FIG. 10). ) Since the location of the through hole 23a ₁ is made one size larger so that the locking claw 35 can be easily fitted, the foaming raw material 6a that has entered the groove 23c through the through hole 23a ₁ has its foaming pressure 6b. The inner standing wall 23b of the concave frame 23 is pushed and deformed to widen the fitting gap and enter the insert 10 as shown by the arrow in FIG. In the general fitting part of the concave frame 23 and the convex frame 33, as shown in FIG. 13 (a), the convex part 33a of the convex frame 33 extends from the outer inner wall 23a of the concave frame 23 through the groove part 23c to the inner standing wall 23b. Since there is no particular problem because the foam raw material 6a sews the fitting gap and enters the insert 10 because it is in contact with or close to the proximal horizontal portion 33c, there is no particular problem. In the fitting region as shown in FIG. 12 where the outer standing wall 23a is missing and the ingress resistance is small, the foam raw material 6a enters the insert 10 during foam molding. Further, as indicated by the arrows in FIG. 10, there is only a portion where the inner standing wall 23b and the base end horizontal portion 33c are in contact with each other as shown in FIG. The inner standing wall 23b of the concave frame 23 was easily pushed into the insert 10 by the foaming pressure 6b. Even if this is not the case, if there is a gap in the contact portion due to manufacturing errors of the concave frame 23 and the convex frame 33, the foaming raw material 6a has entered the insert 10 without difficulty during foam molding. The foaming raw material 6a that has entered then hardens, but there is no particular problem as long as it remains fixed to the inner wall of the insert. However, when the cured product was peeled off due to some sort of splashing, it generated a rattling noise due to vibrations during vehicle operation, leading to poor quality.
Therefore, after conventional causes fitting integrating the protrusion 35b of the locking claw 35 is fitted into the hole 23a _1, prior to the foam molding, sealed from the outside by a seal tape or the like to these fitting portions, Although the entry of the foam raw material 6a into the insert is prevented during foam molding, a labor burden due to the pretreatment and materials such as a tape are required.

  The present invention solves the above-mentioned problems and prevents the entry of foaming raw materials into the insert during foam molding without compromising the labor burden and material burden of pretreatment using materials such as tape. It is an object to provide a seal structure for an insert for a headrest that can stably maintain and improve productivity.

In order to achieve the above object, the gist of the invention described in claim 1 is that a concave frame is provided on the outer peripheral portion of one insert half product and a through hole is provided on the outer standing wall of the concave frame, while the other A convex frame that fits into the concave frame is provided on the outer periphery of the insert halved product, and a part of the convex frame is cut off to provide a locking claw, and the stay is sandwiched between the two insert halved products. The insert structure for a headrest in which the through hole and the locking claw, the concave frame and the convex frame are fitted to form an integrated insert, and the insert is embedded in a foam by foam molding And a hook portion is provided by raising the inner edge portion of the base end horizontal portion of the locking claw, and the hook portion extends from the inner edge portion of the base end horizontal portion to the inner edge portion of the bottom surface of the cut-out notches on both sides. Further, the inner edge portion of the base horizontal portion of the convex portion related to the convex frame ahead is raised and extended. When the other insert halves are on the lower side and the stays are sandwiched and integrated with both insert halves from the top and bottom, the ridge line part of the collar part is lower than the lower edge of the inner vertical wall of the concave frame. And the inner standing wall abuts against the flange or the inner standing wall which inclines by receiving the foaming pressure by foam molding abuts against the collar. The headrest insert has a sealing structure.
A seal structure for a headrest insert according to a second aspect of the present invention is the seal structure for the headrest insert according to the first aspect, wherein the flange portion has an inclined surface that rises and inclines toward the inner side of the insert, and at least in the region where the flange portion is located. It is characterized in that the inner standing wall that forms the wall becomes thinner toward the tip.

As in the first aspect of the invention, the ridge portion of the ridge portion is higher than the lower edge of the inner standing wall of the concave frame and is arranged on the inner side of the insert so that the butt portion directly contacts the inner standing wall or foams. When the flange comes into contact with the inner standing wall that tilts by receiving the foaming pressure in the molding, in the region where the flange exists, the passage entering the insert is blocked by the flange and the inner standing wall. The entry of raw materials into the insert can be prevented.
As in the invention of claim 2, when the inner standing wall is thinned toward the tip, the inner standing wall is more easily tilted by the foaming pressure due to foam molding, and the seal by contact with the collar portion is further increased. Go smoothly. When the buttock has a slope that rises and slopes toward the inside of the insert, and the inner standing wall is thinned toward the tip, the contact area of the inner standing wall that tilts due to foaming pressure increases and the buttock slope Therefore, the sealing performance is further enhanced.

  According to the seal structure of the headrest insert of the present invention, the inner standing wall directly contacts the flange portion provided with the raised portion on the inner side of the insert, or the inner standing wall that tilts by receiving the foaming pressure by foam molding is formed on the flange portion. Since it contacts and seals the area where the buttock exists, entry of foaming raw material into the insert can be easily prevented, and it is excellent in reducing labor cost, product cost, maintaining stable quality, improving productivity, etc. Demonstrate the effect.

  Hereinafter, an embodiment of a seal structure of a headrest insert in foam molding according to the present invention will be described in detail. 1 to 8 show an embodiment of the seal structure of the headrest insert according to the present invention (hereinafter, simply referred to as “insert seal structure”). FIG. 1 is an exploded perspective view of the insert with stay, FIG. FIG. 3 is an enlarged perspective view of the seal structure according to the insert of FIG. 1, and FIG. 3 is an enlarged perspective view of the vicinity of the locking claw, which is an insert half product having a convex frame. 4 is a cross-sectional view taken along the line IV-IV in FIG. 2 after both insert halves are fitted, and FIG. 5 is VV in FIG. 2 after both insert halves are fitted. FIG. 6 is a cross-sectional view taken along the line VII-VII in FIG. 2 after the two insert halves are fitted together. FIG. 7 is a view taken along the line IV-IV in FIG. 2 after both insert halves are fitted using an insert halved product using an inner standing wall different from the inner standing wall of FIGS. FIG. 8 corresponds to the VV line arrow view of FIG. 2 after both insert halves have been fitted using the insert halves using the inner vertical wall of FIG. 7. It is another aspect sectional drawing in a location.

The insert 1 used in the seal structure of the headrest insert according to the present invention is an insert that is attached so as to be able to rotate the stay 4 and embedded in the foam 6 by foam molding, as shown in FIG. It is prepared as a halved product. Specifically, one insert half product 2 (hereinafter referred to as “first”) in which a concave frame 23 is provided on the mating facing surface 22 of the outer peripheral portion 21 and a through hole 23 a ₁ is provided in a part of the outer standing wall 23 a of the concave frame 23. And a convex frame 33 that fits into the concave frame 23 is provided on the fitting facing surface 32 of the outer peripheral portion, and a part of the convex frame 33 is cut off. Another insert half-finished product 3 (hereinafter referred to as “second half-finished product”) provided with the locking claws 35 via 34 and 34 is prepared.
Then, an inner edge portion 35d of the base end horizontal portion 35c of the locking claw 35 is raised to provide a flange portion 36, and the flange portion extends from the inner edge portion 35d of the base end horizontal portion 35c to the bottom surface of the notched cut portions 34 on both sides. The inner edge portion 34d of 34c and the inner edge portion 33d of the base end horizontal portion 33c of the convex portion 33a associated with the convex frame 33 ahead are raised and extended. In addition, with the second half-finished product 3 facing down, the holding plate 5, the stay horizontal portion 41, and the upper end portion of the stay vertical portion 40 between the second half-finished product 32 and the first half-finished product Sandwiched from above and below,
When the through-hole 23a ₁ and the locking claw 35 are fitted, the concave frame 23 and the convex frame 33 are fitted, and when both the insert halves 2 and 3 are fitted and integrated, the ridge line of the flange 36 The portion is higher than the lower edge of the inner vertical wall 23b of the concave frame 23 and is arranged on the insert inner 10 side, and the inner vertical wall 23b directly contacts the flange 36 or receives the foaming pressure 6b by foam molding. The inner standing wall 23b that is tilted in this manner has a seal structure that abuts against the flange 36.

The first half product 2 described above is a half product having the concave frame 23, and is a resin molded product obtained by half-molding the insert product shown in FIG. 11 into a bowl shape as shown in FIGS. The first half-finished product 2 is provided with a concave frame 23 having a concave cross section on the fitting facing surface 22 along the outer peripheral portion 21, and a part of the outer standing wall 23 a that forms the recess of the concave frame 23 An elongated through hole 23a ₁ is provided along the periphery. Here through hole 23a ₁ of the form in four locations near the four corners of the recessed frame 23 in a plan view substantially square. As shown in FIGS. 2 and 6, the recessed frame 23 extends the outer standing wall 23 a formed by extending the outer surface of the outer peripheral portion 21 of the first half product 2 as it is, and the inner surface of the inner peripheral portion of the first half product 2 as it is. It is formed by an inner standing wall 23b formed and a groove 23c sandwiched between both. The groove 23c has a gap and a depth into which the convex portion 33a of the convex frame 33 provided in the second half product 3 is fitted. The concave frame 23 here makes the inner standing wall 23b higher than the outer standing wall 23a. Incidentally, the concave frame 23 of FIG. 10 in the through holes 23a ₁ closer, but the ribs 29 connecting the outer standing wall 23a and the inner standing wall 23b, is not provided in FIG.
Reference numeral 24 denotes a boss, and a pin stands upright at the position of the second half product 3 facing the boss. In FIG. 1, this pin is hidden behind the bowl-shaped main body 30. The pin is inserted into the boss 20 after being inserted into the through hole 52 of the plate-shaped holding plate 5. The insertion of the pin into the boss 24 is performed by the concave frame 23 and the convex frame 33. a fitting, also the fitting between the through holes 23a ₁ and the protruding portion 35b of the locking claw 35, the first halves article 2 and simultaneously the second halves article 3 are integrated. Further, when the pin is inserted into the through hole 52 of the plate-like holding plate 5, the insert 1 is formed which is swingable with respect to the stay 4 and fitted and integrated. Reference numeral 25 denotes a stay cylinder, and when the first half product 2 and the second half product 3 are integrated, the stay 4 is formed as an insert 1 with a stay 4 and is rotatably attached to the holding plate 5. The vertical portion 40 protrudes outward from the insert through the hole 25a of the cylindrical portion 25.

The second half product 3 is a half product having the convex frame 33, and is a resin molded product obtained by half-molding the insert product shown in FIG. 11 into a bowl shape as shown in FIGS. This is a half-finished product that is the counterpart of the first half-finished product 2 obtained by halving the insert product. The second half product 3 is provided with a convex frame 33 fitted to the concave frame 23 on the fitting facing surface 32 along the outer peripheral portion 31 (FIG. 3). Further, a part of the convex frame 33 is cut off, and a locking claw 35 is provided with a protruding portion 35b protruding outward at the upper end portion of the convex wall 35a having a convex cross section through the cutout notch 34. Incidentally, the provision of the shredding notch 34 on both sides of the locking claw 35, when the locking claw 35 is fitted into the through hole 23a _1, the inner surface of the outer standing wall 23a of the protruding portion 35b has a through hole 23a ₁ This is because, while rubbing, the latching claws 35 are deflected to the back side by elastic deformation to smoothly move the inner surface of the outer standing wall 23a.
Locking claw 35 is formed in four places corresponding positions of the through holes 23a _1. And the collar part 36 which raises the inner edge part 35d of the base end horizontal part 35c of the said convex wall 35a is provided. The flange portion 36 bulges the inner edge portion 34d of the bottom surface 34c of the cut-out notches 34 on both sides from the convex wall 35a and the inner edge portion 33d of the proximal horizontal portion 33c of the convex portion 33a of the convex frame 33 ahead of the flange portion 36a. And extended (FIG. 3).

The area where the collar portion 36 is provided is provided with the collar portion 36 in the whole area in the direction perpendicular to the paper surface at the position where the locking claw 35 illustrated in FIG. 4 is provided, and at the position of the cutout notch portion 34 illustrated in FIG. A collar portion 36 is provided in the entire area in the vertical direction. On the other hand, at the location of the convex frame 33 close to the inner edge portion 34d on the bottom surface of the cutout notch 34, a flange 36 is provided in the direction perpendicular to the paper surface shown in FIG. region of the collar portion 36 to the raised inner edge portion 33d, as shown in FIG. 4, while the foam material 6a that has entered from the through hole 23a ₁ of FIG. 5 is moved in the direction perpendicular to the paper surface in FIG. 4 (b) to 6 (b) It is sufficient to provide it in an area that satisfies the curing distance. During foam molding, if the foam raw material 6a adheres and cures to the gap wall in the middle of its movement and the foam raw material 6a does not enter the insert 10 in the large space, the cured product will peel off and cause a rattling sound. Because there is nothing. In FIG. 3, the flange 36 formed by raising the inner edge portion 33 d in the region of the convex frame 33 is illustrated, but in the drawing, the length to the region end of the flange 36 extending in the lower right front direction. Is shown briefly. In order to draw the collar 36 in an easy-to-understand manner, it is actually extended slightly to the lower right side.
At the time of foam molding, the flange portion 36 is a notched portion on both sides from the portion of the locking claw 35 so that the foam raw material 6a entering from the through hole 23a ₁ stays in the fitting portion of the concave frame 23 and the convex frame 33. A predetermined length that extends beyond the part 34 and extends to the part of the convex frame 33 on both sides is set. Of course, the flange 36 can be provided in the entire region of the convex frame 33 in the same manner as the portions of the locking claw 35 and the cutout notch 34.

  Then, the first half-finished product 2 and the second half-finished product 3 sandwich the stay horizontal portion 41 and the upper end portion of the stay vertical portion 40 from above and below with the second half-finished product 3 facing down. When fitted and integrated, the inner inner wall 23b and the flange 36 are arranged such that the ridge line portion of the flange 36 is disposed higher than the lower edge of the inner standing wall 23b of the concave frame 23 and on the insert 10 side. Or a seal structure in which the inner standing wall 23b that tilts by receiving the foaming pressure 6b by foam molding contacts the flange 36. When the inner standing wall 23b abuts against the flange portion 36, a region where the flange portion 36 is present is sealed at the time of foam molding, and entry of the foam raw material 6a into the insert 10 is prevented.

In the present embodiment, at the stage where the first half-finished product 2 and the second half-finished product 3 are fitted and integrated, at the place where the locking claw 35 is located, the state as shown in FIG. The inner standing wall 23b of the half-finished product 2 hangs down and is closer to the proximal horizontal portion 35c on the insert 10 side than the convex wall 35a of the second half-finished product 3. The flange 36 is arranged closer to the insert inner side 10 than the inner standing wall 23 b, and the ridge line portion of the flange 36 protrudes higher than the lower edge of the inner standing wall 23 b of the concave frame 23. And to such fitted state, the inner standing wall 23b for tilting undergoing foaming pressure 6b of foaming material 6a enter the through hole 23a ₁ in foam molding, a structure in which the flange portion 36 for sealing contact with (FIG. 4 b).
At the stage where the first half-finished product 2 and the second half-finished product 3 are fitted and integrated, the severed cutout 34 corresponding to the direction of the arrow VV in FIG. 2 is also as shown in FIG. The inner standing wall 23b of the first half-finished product hangs down from the top and approaches the bottom surface 34c of the second half-finished product 3. Then, the flange 36 is arranged on the inner edge portion 34d on the insert inner 10 side than the inner standing wall 23b, and the flange 36 protrudes higher than the lower edge of the inner standing wall 23b of the concave frame 23. And to such fitted state, the inner standing wall 23b for tilting undergoing foaming pressure 6b of foaming material 6a enter via the shredding notch 34 from the through hole 23a ₁ in foam molding, the flange portion 36 is in contact with Seal it (b in FIG. 5).
At the stage where the first half-finished product 2 and the second half-finished product 3 are fitted and integrated, even at the position of the convex frame 33 near the notch 34 corresponding to the arrow VII-VII in FIG. (A) As shown in FIG. 8, the inner vertical wall 23b of the first half-finished product hangs down from above, and comes close to the base end horizontal portion 33c of the second half-finished product 3. The flange 36 is arranged on the inner edge portion 33d on the insert inner 10 side with respect to the inner standing wall 23b, and the flange 36 protrudes higher than the lower edge of the inner standing wall 23b of the concave frame 23. And to such fitted state, the inner standing wall 23b for tilting undergoing foaming pressure 6b of foaming material 6a enter the through hole 23a ₁ in foam molding, the flange portion 36 for sealing contact with (in FIG. 6 (b) ).

That is, by fitting and integrating the first and second half-finished products 2 and 3, the flange portion 36 is arranged closer to the insert inner 10 side than the inner standing wall 23 b. The flange 36 has a height that comes into contact with the inner standing wall 23b when the inner standing wall 23b is tilted toward the inside 10 of the insert by the foaming pressure 6b during foam molding. Then, the collar portion 36, foaming material 6a from hole 23a ₁ is formed in a region that enters the insert 10, the sealing structure of the insert 1 to be self-sealing by utilizing the pressure of the blowing pressure 6b during foam molding To do.
As foaming material 6a at the time expansion molding it does not enter the through hole 23a ₁ into the concave frame 23, the insert 10 as it rides over the fitting portion of the convex frame 33, locking claws 35 corresponding to the holes 23a _1, shredding A collar 36 is provided at the notch 34 (a in FIG. 4 and b in FIG. 5), and the collar 36 is provided to extend to the area of the convex frame 33 on both sides (a in FIG. 6). , foaming material 6a entering from the through hole 23a ₁ when foam molding is sealed utilizing the force that pushes the inner standing wall 23b (b in FIG. 4, b 5, b in FIG. 6). During foam molding, a foamed pressure 6b of foaming material 6a entering from the through hole 23a ₁ is the inner standing wall 23b is tilted to the 10 side in the insert, by providing the flange portion 36 behind, opposite to the foam material 6a Seal with good pressure. During foam molding, foaming material 6a to be entered into the insert 10. through hole 23a ₁ is, because it is sealed by the contact of the inner standing wall 23b and the flange portion 36 at its first, path prior to its The direction is changed and the process proceeds in the direction perpendicular to the paper surface of FIGS. 4 (b) and 5 (b). And the foaming raw material 6a is hardened in the course in the direction perpendicular to the paper surface by extending the range in which the collar portion 36 is provided to a predetermined region of the convex frame 33 beyond the locking claw 35 and the cutout notch 34. End up.

7 and 8 are sectional views using the first half-finished product 2 of another embodiment in which the inner standing wall 23b is thinned toward the tip instead of the inner standing wall 23b of FIGS. 1 to 6. 7 corresponds to FIG. 4, and FIG. 8 corresponds to FIG. Here, the tip-side half portion 23b ₂ is made thinner by one step than the root-side half portion 23b _{1 of the} inner standing wall 23b according to the first half-finished product 2. Moreover, the collar part 36 which concerns on the 2nd half-finished product 3 has the slope which raises gently toward the insert 10 side like FIG. 7, FIG. 8, and the collar part 36 itself is robust. The inner standing wall 23b tilted by the foaming pressure can be firmly received by the flange 36 and sealed.
Then, using the first half-finished product 2 and the second half-finished product 3, the second half-finished product 3 is placed on the lower side, and the stay horizontal portion 41 and the upper end portion of the stay vertical portion 40 are sandwiched from above and below. When the fitting is integrated, the ridge line portion of the flange portion 36 is arranged higher than the lower edge of the inner standing wall 23b of the concave frame 23 and on the insert 10 side, and the foaming pressure 6b is obtained by foam molding. In response to this, the inner standing wall 23b tilts to seal the region where the flange 36 abuts and the flange 36 is present, and the seal structure of the insert 1 prevents the foaming raw material 6a from entering the insert 10. .

Specifically, at the stage where the first half-finished product 2 and the second half-finished product 3 are fitted and integrated, at the place where the locking claw 35 is located, the state as shown in FIG. The inner standing wall 23b of the split product 2 hangs down and abuts (or closes) at a point where the flange portion 36 starts to rise on the insert 10 side with respect to the convex portion 33a of the second half product 3. Then, the ridge line portion of the flange portion 36 is arranged closer to the inside of the insert 10 than the inner standing wall 23b, and the ridge line portion of the flange portion 36 is raised higher than the lower edge of the inner standing wall 23b of the concave frame 23. In addition, at the stage where the first half-finished product 2 and the second half-finished product 3 are fitted and integrated, the portion of the notch 34 corresponding to the VV line arrow in FIG. The inner standing wall 23b of the first half-finished product hangs down from above, and comes into contact (or close proximity) to the point where the flange 36 of the second half-finished product 3 starts to rise. Then, the ridge line portion of the flange portion 36 is arranged closer to the inside of the insert 10 than the inner standing wall 23b, and the ridge line portion of the flange portion 36 is raised higher than the lower edge of the inner standing wall 23b of the concave frame 23.
Such fitted under engaged state, the inner standing wall 23b for tilting undergoing foaming pressure 6b of foaming material 6a enter the through hole 23a ₁ in foam molding, the flange portion 36 for sealing contact with the (FIG. 7 B, B) in FIG. 7 and 8 in which the inner standing wall 23b is already in contact with the point where the flange portion 36 starts to rise, the inner standing wall 23b is thinned by receiving the foaming pressure 6b of the foaming raw material 6a during foam molding. go in close contact with the inclined surface 36a of the flange portion 36 while in tilting the previous tip half portion 23b ₂ elastically deformed. It becomes the seal structure of the insert 1 in which the front end portion of the inner standing wall 23b comes into contact with and closely contacts the flange portion 36.

The seal structure of the insert 1 constructed as described above effectively uses the foaming pressure 6b of the foaming raw material 6a by foam molding without using materials such as seal tape, which has been necessary in the past, and pre-treatment work using this. It can be used to realize self-sealing. It leads to reduction of manufacturing labor and manufacturing cost. In areas where foaming material 6a foam molding enters through the hole 23a ₁ is foaming material 6a is holes 23a _1, eluded the shredding notch 34, intrude into the insert 10 as it is, foaming pressure 6b with the foaming material 6a However, the inner standing wall 23b is tilted toward the insert 10 side, causing a problem that the foaming raw material 6a enters the insert 10 through the opened gap. However, in the seal structure of the present invention, by providing the flange 36 behind the inner standing wall 23b on the inner side of the insert 10, the inclination of the inner standing wall 23b is reversely used, and the flange 36 is formed on the inner standing wall 23b. , The entry of the foam raw material 6a into the insert 10 is stopped in the region where the flange portion 36 is present, so that no pretreatment or the like is required prior to foam molding. The seal structure is extremely reasonable. The flange portion 36 provided with a raised portion on the insert inner 10 side than the inner standing wall 23b abuts on the inner inner wall 23b as it is, or abuts on the inner standing wall 23b tilted by receiving the foaming pressure 6b by foam molding, Since the region where the flange portion 36 is present is sealed, the foam raw material 6a is reliably prevented from entering the insert 10 and exhibits excellent effects such as maintaining stable quality and improving productivity.
Further, as in the second embodiment, when the inner standing wall 23b is thinned toward the tip, the inner standing wall 23b that is inclined by receiving the foaming pressure 6b of the foam molding at the time of foam molding is thinned at the tip. The portion is easily urged to be elastically deformed, and more strongly abuts against the flange 36 and tightly seals the area where the flange 36 is present, thereby preventing the foam raw material 6a from entering the insert 10. Make sure. Further, as shown in FIGS. 7 and 8, when the flange portion 36 has an inclined surface 36a that rises and inclines toward the inside 10 of the insert, the distal end of the inner standing wall 23b that inclines upon receiving the foaming pressure 6b of foam molding. The tip portion of the inner standing wall 23b is easily tilted and elastically deformed by receiving the foaming pressure 6b of the foam molding, and is strongly abutted against the inclined surface 36a by the surface of the tip portion. Exhibits even more power in the seal structure.

  The present invention is not limited to those shown in the above-described embodiments, and various modifications can be made within the scope of the present invention depending on the purpose and application. Shape, size, number of first half-finished product 2, concave frame 23, second half-finished product 3, convex frame, cutout notch 34, locking claw 35, collar 36, stay 4, holding plate 5, etc. Etc. can be appropriately selected depending on the application.

The form of the seal structure of the insert for headrests of the present invention is shown, and the exploded perspective view is shown. It is an expansion perspective view of the seal structure which concerns on the insert of FIG. FIG. 5 is an enlarged perspective view of the vicinity of a locking claw in an insert half product having a convex frame. It is sectional drawing in the location equivalent to the IV-IV line arrow of FIG. 2 after both insert half-finished goods fitted. It is a cross section in the location equivalent to the VV line arrow of Drawing 2 after both insert half-cut products fit. It is sectional drawing in the location corresponded to the VII-VII line arrow of FIG. 2 after both insert half-cut products fit. It is another aspect sectional drawing in the place equivalent to the IV-IV line | wire arrow of FIG. 2 after both insert half-finished goods fitted using the insert half-finished goods of another aspect of FIGS. It is another aspect sectional drawing in the location equivalent to the VV line arrow of FIG. 2 after both insert half-split parts fitted using the insert half-split part using the inner side standing wall of FIG. The form of the seal structure of the insert for headrests of a prior art is shown, The exploded perspective view is shown. It is a description perspective view of a prior art. It is a description perspective view of a prior art. It is explanatory sectional drawing of a prior art. It is explanatory sectional drawing of a prior art.

Explanation of symbols

1 Insert 10 Inside the insert 2 One insert half product (first half product)
23 Concave frame 23a ₁ through hole 3 Other insert halves (second half)
33 Convex frame 33d Inner edge part 34 Dimensional cutout 34d Inner edge part 35 Locking claw 35d Inner edge part 36a Slope 4 Stay 6 Foam

Claims (2)

A convex frame that is provided with a concave frame on the outer peripheral portion of one insert half-finished product and has a through hole provided on the outer vertical wall of the concave frame, and that fits into the concave frame on the outer peripheral portion of another insert half-finished product And a claw is provided by cutting off a part of the convex frame, and the stay is sandwiched between the two insert halves so that the through hole, the claw, the concave frame, and the convex frame are provided. In a seal structure of an insert for a headrest in which an insert to be integrated is formed, and the insert is embedded in a foam by foam molding,
A flange portion is provided by raising an inner edge portion of the base horizontal portion of the locking claw, and the flange portion extends from the inner edge portion of the base end horizontal portion to the inner edge portion of the bottom surface of the cut-out notches on both sides, and beyond Extending the inner edge of the horizontal part of the base end of the convex part of the convex frame, the other insert halves are on the lower side, and the stay is sandwiched from both the upper and lower parts to fit together When the ridge portion of the ridge portion is arranged higher than the lower edge of the inner standing wall of the concave frame and on the inner side of the insert, the inner standing wall abuts on the heel portion or is formed by foam molding. A seal structure for an insert for a headrest, wherein the inner standing wall that tilts in response to the foaming pressure comes into contact with the flange. 2. The headrest according to claim 1, wherein the flange portion has an inclined surface that rises and slopes toward the inside of the insert, and at least in the region where the flange portion is located, the inner standing wall of the concave frame decreases toward the tip. Insert seal structure.

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