JP2018140691A - Headrest for vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relatively easily prevent leakage from an opening when urethane foam is injected and expanded in a bag-shaped skin even in a case where the skin for a headrest is a one-layer structure.SOLUTION: A skin part for a headrest for a vehicle seat comprises: a first slice part having a portion not sewn to part of a portion overlapped by a skin member, and folded inside the skin part formed in a bag shape extending and sewn from one skin member side of a portion overlapped by the skin member in this non-sewn portion; and a second slice part in which the first slice part and parts near both ends are sewn along a direction where it is overlapped by the first slice and folded inside the skin part formed in a bag shape extending and sewn from the other skin member side of a portion overlapped by the skin member in the non-sewn portion. The first slice and the second slice are joined to urethane foam, thereby preventing the urethane foam from leaking out from an opening.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a headrest for a vehicle seat, and more particularly, to a headrest for a vehicle seat having a configuration in which the surface of a foam-molded member is covered with a skin.

  As a headrest of a conventional vehicle seat, for example, in Japanese Patent Application Laid-Open No. 2007-195768 (Patent Document 1), a terminal portion on one side is folded back at the opening of a skin that is sewn in a bag shape, and the other is placed on the other. A configuration is disclosed in which three overlapping portions are formed inside the opening by overlapping the terminal portions on the side.

  Also, in Japanese Patent Laid-Open No. 2016-182909 (Patent Document 2), after a single-layer structure skin is sewn into a bag shape, an opening shaping jig slightly longer than the size of the opening is inserted into the opening. In the state where the opening is closed by applying tension, urethane is injected into the bag-shaped skin and foamed.

JP 2007-195768 A JP 2016-182909 A

  When the skin of the headrest of a passenger car seat is formed of a three-layer structure having a surface layer as a first layer, a second layer formed of wadding, etc., and a third layer formed of a film, etc. The rigidity of is relatively high. As described in Patent Document 1, when such an epidermis is formed in three layers on the inner side of the opening of the epidermis sewn in a bag shape, the three-layered portion is compared. Due to its high rigidity, it overlaps tightly without any gaps, and when urethane is injected into the inside of the bag-like skin and foamed, it hardly leaks out from the opening.

  However, as described in Patent Document 2, if the skin of the headrest has a single layer structure, sufficient rigidity cannot be obtained even if three terminal portions of the skin are formed inside the opening. Therefore, when the skin has a single-layer structure, as described in Patent Document 1, in a state where only three sheets are stacked, urethane is injected into the inside of the bag-shaped skin and foamed, There is a risk that urethane foamed out from the opening of the part where three sheets are stacked leaks out.

  In order to prevent the foamed urethane from leaking outside the bag-shaped skin, Patent Document 2 discloses a method in which an opening shaping jig slightly longer than the opening dimension is inserted into the opening to apply tension. Adopted. By using an opening shaping jig to pull and close the opening, it is possible to prevent urethane foam injected into the bag-shaped skin from leaking outside the bag-shaped skin. ing.

  However, as described in Patent Document 2, in order to insert an opening shaping jig that is slightly longer than the opening dimension into the opening, the opening shaping jig is inserted into the opening by pulling the opening. Workability is poor. As a result, it takes a relatively long time to start injecting urethane into the bag-shaped skin.

  The present invention solves the above-described problems of the prior art, and even when the skin of the headrest has a single layer structure, when urethane is injected into the inside of the bag-shaped skin and foamed, the opening is opened. It is intended to provide a headrest having a configuration that can be relatively easily prevented from leaking out from the portion.

  In order to solve the above-described problems, in the present invention, the headrest of the vehicle seat is filled inside the skin portion that is formed by stitching the skin member and stitching it into a bag shape, and the skin portion that is stitched and shaped into a bag shape. And a stay having a pair of leg portions extending from the inside of the urethane foam to the outside of the skin portion. The skin portion is stitched to a part of the portion where the skin members are overlapped. The skin member has a portion that is not sewn, and the skin member is folded inside the skin portion that is stretched and sewn from the side of one skin member of the portion where the skin member is overlapped in the unstitched portion and formed into a bag shape. The first slice portion is overlapped with the first slice portion inside the bag portion formed by sewing from the other skin member side of the portion where the skin member is overlapped in the unsewn portion. In the folded direction Thus, the first section portion and the second section portion where the end portions of both sides are sewn are sewn, the second section portion is bonded to urethane foam, and the second section portion has a hole. The first section that is formed at a plurality of locations and is folded back is bonded to the urethane foam through holes formed at the plurality of locations in the second section.

  According to the present invention, even when the skin of the headrest has a single-layer structure, when the foamed urethane foam is injected into the bag-shaped skin and foamed, the leakage from the opening is compared. Therefore, the headrest can be provided without impairing the appearance quality of the opening.

It is a headrest which concerns on the Example of this invention, and is a perspective view of a headrest which shows the state immediately after filling inside with foaming urethane and taking out from the metal mold | die. It is the perspective view of the skin member which overlapped and showed the skin member of the headrest which concerns on the Example of this invention, and the two skin members before stitching | suture were shown. It is sectional drawing equivalent to the AA cross section of FIG. 1 before urethane foaming which shows the state which let the nozzle penetrate the overlapped section part with the headrest which concerns on the Example of this invention. It is sectional drawing which shows the state in the middle of injection | pouring of the urethane foam undiluted | stock solution by setting to the metal mold | die through a nozzle in the overlapped section part with the headrest which concerns on the Example of this invention. It is sectional drawing which shows the state made to fill the inside of the front office formed in the bag shape inside the metal mold | die with the urethane foam with the headrest which concerns on the Example of this invention. It is sectional drawing equivalent to the BB cross section of FIG. 1 in the state with which the headrest which concerns on the Example of this invention was made to fill the inside of the front office formed in the bag shape inside the metal mold | die with urethane foam. It is sectional drawing which shows the state which filled the urethane foam inside the skin part with the headrest which concerns on the Example of this invention.

  Even if the skin of the headrest has a one-layer structure or a two-layer structure in which a thin resin layer is formed on the side in contact with the urethane foam, the urethane foam stock solution is injected into the inside of the bag-shaped skin. When foaming, it is possible to relatively easily prevent urethane foam from leaking out of the bag-shaped skin opening and to form a headrest without impairing the appearance quality of the opening. It is something that can be done.

  That is, in the present invention, the skin portion of the headrest of the vehicle seat has a portion that is not stitched to a part of the portion where the skin member is overlapped, and the portion where the skin member is overlapped in the portion that is not stitched The first skin part which is folded from the inside of the skin part which is stretched and stitched from the side of the one skin member and is formed into a bag shape, and the other skin member of the part where the skin member is superimposed on the part which is not stitched A second section in which the first section and the vicinity of the ends on both sides are sewn along the direction of being folded and overlapped with the first section within the skin formed by sewing and forming a bag shape. It has a section, and the first section and the second section are bonded to the urethane foam, thereby preventing the urethane foam from leaking outside through the opening.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of a headrest 200 of a vehicle seat according to the present embodiment. The state shown in FIG. 1 shows a state immediately after the urethane foam stock solution is injected from the nozzle 140 into the inside of the skin 100 formed into a bag shape and foamed. The step of injecting and foaming the urethane foam stock solution into the inside of the bag-shaped skin 100 is performed in a state where the bag-shaped skin 100 is set inside the mold as shown in FIG.

  In the configuration of the headrest 200 shown in FIG. 1, reference numeral 100 denotes an outer skin, which is composed of one layer made of woven or knitted fabric, leather, synthetic leather, or the like. 110 and 120 are members constituting the epidermis 100, which are sewn along the line of the stitched portions 210 on both sides, and an unsewed opening 220 is formed in the central portion.

  The non-sewn opening 220 is used to turn over the back and front of the skin 100 through the opening 220 after the skin member including the skin members 110 and 120 that are members of the skin 100 is stitched. In the skin 100, the skin member is also stitched at portions other than the illustrated stitching portion 210, but the illustration is omitted for the sake of simplicity.

  FIG. 2 shows a state before the skin members 110 and 120 of the skin 100 are stitched (sewn). In the state shown in FIG. 2, the surface member 110 has an upper surface (surface on the front side) on the upper side in the state formed as shown in FIG. 1. On the other hand, the surface member 120 has a surface (surface on the front side) on the lower side in a state of being formed as shown in FIG. In other words, in the state shown in FIG. 2, the skin members 110 and 120 are in a state where the front side surfaces face each other.

  A slice 111 is formed on the skin member 110, and a slice 121 is formed on the skin member 120. Cuts 141 and 142 for passing the nozzle 140 are formed in the skin member 110 and the section 111. The skin member 120 is formed with a cut 143 for allowing the nozzle 140 to pass therethrough. On the other hand, the skin member 110 is provided with two stay holes 131 through which the pair of leg portions 130a and 130b of the stay 130 are passed.

  A cover 230 formed of a coarse mesh-like fiber (mesh) is attached to the section 121 on the section 121 on the skin member 120 side by sewing or adhesion so as to cover the top of the cut 143. The section 121 has two holes 122 formed therein. FIG. 2 shows an example in which the holes 122 are formed in two places, but the number of the holes 122 may be one, or may be three or more.

  Further, in this embodiment, as shown in FIG. 2, the two holes 122 are arranged at the target positions on both sides of the notch 143 so that the urethane foam leaks out from the opening to the outside. I try to prevent it.

  In the configuration shown in FIG. 2, the skin members 110 and 120 are sewed and stitched along a line indicated by a one-dot chain line as the stitching portion 210 in a state where the notches 141 and 143 are overlapped with each other. . Thereby, the skin members 110 and 120 are joined together, and the skin 100 is formed into a bag shape. In this state, the section indicated by L in FIG. 2 is not stitched and forms an opening 220. The two holes 122 are both formed inside the opening 220.

  Actually, the skin 100 is formed into a bag shape by sewing and joining the skin members other than the skin members 110 and 120. In the present embodiment, the skin members 110 and 120, Will be described as being formed into a bag shape.

  The skin members 110 and 120 are stitched into a bag shape, and the skin members 110 and 120 are turned over by passing the stitched portions of the skin members 110 and 120 through the non-stitched opening 220. As shown in FIG. 1, the front side surfaces facing inward at the time of sewing become the outer side. Thereafter, the pair of leg portions 130 a and 130 b of the stay 130 are passed through the two stay holes 131.

  Here, by making the skin members 110 and 120 have a single-layer structure, the rigidity of the skin 100 can be reduced (softened) as compared with the case where the conventional skin is formed of three layers. As a result, when the stitched skin members 110 and 120 are turned over, the width L of the opening 220 for allowing the skin members 110 and 120 to pass through is larger than in the case of the conventional skin formed with three layers having high rigidity. Can be small.

  Specifically, when a conventional skin formed with three layers is used, the dimension of L of the opening 220 needs to be around 120 mm, whereas the skin member formed with one layer according to the present embodiment. When passing 110 and 120, it can be reduced to about 50 to 90 mm, preferably about 60 to 80 mm.

  FIG. 3 shows a state in which the nozzle 140 is inserted through the cuts 141, 142, and 143 into the inside of the skin 100 formed in a bag shape (the lower side in FIG. 3). This corresponds to the AA cross section before the urethane foam is filled into the skin 100 formed in the bag shape of FIG.

  In the state shown in FIG. 3, the stitched skin members 110 and 120 are turned upside down through the opening 220, and then the slices 111 and 121 are separated into the skin member 110 inside the bag-shaped skin 100. The nozzle 140 is bent from the side of the notch 142 through the notches 141 and 143 so as to protrude into the skin 100. FIG. In this state, the tip portion of the nozzle 140 is covered with a cover 230 attached to the slice 121.

  When the stitched sections 111 and 121 are folded toward the skin member 110 in order to pass the nozzle 140 through the notches 141 and 143 from the notch 142 side, they are formed and overlapped with the sections 111 and 121, respectively. The cuts 141 and 143 are bent so as to overlap with the cuts 142 formed in the skin member 110.

  As shown in FIG. 4, the skin 100 formed in a bag shape by the skin members 110 and 120 to which the nozzle 140 is inserted and the stay 130 is attached is mounted on the molds 311 and 312. In this state, a urethane foam stock solution 151 is supplied from a urethane foam stock solution supply unit (not shown) to the inside of the skin 100 formed in a bag shape via the nozzle 140.

  The urethane foam stock solution 151 is supplied from the tip of the nozzle 140 to the inside of the skin 100 formed in a bag shape with a certain amount of momentum (injection speed). At this time, if there is no cover 230 immediately before the outlet of the nozzle 140, the urethane foam concentrate 151 that has jumped out from the tip of the nozzle 140 is sprayed in a concentrated manner on a part of the skin member 110 or 120. 151 will soak into part of the skin member 110 or 120 excessively. The urethane foam stock solution 151 that has excessively soaked in the skin member 110 or 120 solidifies without foaming, and impairs the tactile sensation of the headrest 200 that originally has a soft touch.

  On the other hand, in the present embodiment, the urethane foam stock solution 151 that has jumped out of the nozzle 140 hits the cover member 110 or 120 after it has hit the cover 230 that covers the tip of the nozzle 140 and has been weakened. Yes. By adopting such a structure, the urethane foam undiluted solution 151 whose strength is weakened by hitting the cover 230 does not soak into the outer skin member 110 or 120, and it is possible to prevent the touch feeling of the headrest 200 from being impaired. .

  The urethane foam undiluted solution 151 supplied from the nozzle 140 to the inside of the skin 100 formed in the bag shape is foamed inside the skin 100 to form the foamed urethane 150, and is formed in the bag shape as shown in FIG. Spread the epidermis 100. As a result, the skin members 110 and 120 are molded following the shape formed by the molds 311 and 312.

  Here, when the section 111 on the skin member 110 side is not in contact with the urethane foam 150, the sections 111 and 121 may be separated from each other by the pressure received from the urethane foam 150 in the opening 220 to form a gap. There is sex. This becomes more prominent when the skin members 110 and 120 are formed of a relatively flexible member having a single layer structure.

  When such a gap is formed, a part of the urethane foam 150 may leak out from the gap. Further, even if the urethane foam 150 is not leaked to the outside, there is a possibility that a portion bent from the skin member 110 of the section 111 is turned up by being pushed up by the urethane foam 150. As a result, the appearance of the headrest 200 may be damaged.

  In this embodiment, in this embodiment, a plurality of holes 122 (shown in FIG. 2) are provided on the inner side of the section 121 of the skin member 120 from the stitching portion 210 (in FIG. 2, an interval narrower than the dimension L of the opening 220). In this example, two pieces are formed, and the section 111 on the skin member 110 side is also in contact with the urethane foam 150 through the hole 122. In this way, by impregnating the surface of the section 111 with urethane foam through the plurality of holes 122 of the section 121 and bonding the section 111 and the urethane foam 150, the sections 111 and 121 are separated by the pressure received from the foamed urethane 150. This prevents the formation of a gap.

  This configuration will be described with reference to FIG. In FIG. 6, urethane foam 150 is formed inside (under the skin members 110 and 120 in FIG. 6) in a cross section BB (see FIG. 1) crossing the hole 122 formed in the slice 121 of the skin member 120. The state of filling is shown. The slice 121 of the skin member 120 is in contact with the urethane foam 150. Furthermore, the urethane foam 150 is also in contact with the section 111 on the skin member 110 side through the holes 122 formed at two locations on the section 121. As a result, the urethane foam 150 adheres to the section 111 and the sections 111 and 121 are kept in close contact with each other in the opening 220.

  Further, by providing the plurality of holes 122 at a position as close as possible to the portion where the section 111 is folded back, it is possible to further suppress the part where the section 111 is folded back from the skin member 110 from being turned up. Specifically, the plurality of holes 122 are formed at a position closer to the place where the section 111 is folded than the notch 141 for passing the nozzle 140 formed in the section 111. Thereby, the section 111 can be bonded to the urethane foam 150 near the portion where the section 111 is folded back, and the portion where the section 111 is folded from the skin member 110 can be further prevented from turning up.

  In addition, since the width dimension L of the opening 220 can be made smaller than the width dimension of the conventional opening, the opening 220 is formed in two locations at a smaller interval than the opening dimension L. By combining the holes 122, the epidermis while reliably maintaining the close contact between the sections 111 and 121 in the opening 220 without using an opening shaping jig as described in Patent Document 2. The urethane foam 150 can be formed inside 100.

  Here, the diameter (diameter) of the hole 122 is set to 3 to 10 mm, more preferably 5 to 8 mm in order to securely connect the section 111 to the foamed urethane 150 through the hole 122. If the diameter of the hole 122 is larger than 10 mm, the urethane foam 150 may protrude from between the sections 111 and 121 and the appearance of the headrest 200 may be impaired. Further, if the diameter of the hole 122 is smaller than 3 mm, the contact area between the section 111 and the urethane foam 150 becomes small, and a sufficient adhesive force cannot be secured between the section 111 and the urethane foam 150. The sections 111 and 121 are separated from each other by the pressure received from the foamed urethane 150 to form a gap, and the foamed urethane 150 may leak to the outside.

  In this state, even when pressure is applied from the foamed urethane 150 at the opening 220, the section 111 connected to the foamed urethane 150 through the holes 122 formed at two locations of the section 121 is separated from the section 121. It is possible to maintain a close contact state. As a result, the urethane foam 150 does not leak to the outside from the opening 220, and the headrest 200 can be formed without impairing the appearance as shown in FIG.

  FIG. 2 shows an example in which two holes 122 having a diameter of 3 to 10 mm are formed in the slice 121. However, the present embodiment is not limited to this, and instead of the holes 122, slit-shaped holes 122 are formed. A plurality of elongated holes may be formed.

  According to the present embodiment, even if the skin 100 of the headrest 200 is formed by a single layer of the skin members 110 and 120, the urethane foam concentrate 151 is supplied to the inside of the skin 100 formed into a bag shape, and the inside of the skin 100. In the case of filling the foamed urethane 150, the foamed urethane 150 can be reliably prevented from leaking outside through the opening 220 formed in the skin 100. As a result, the headrest 200 using the skin 100 formed by the single-layer skin members 110 and 120 can be reliably formed without impairing the appearance or the touch.

  In addition, although the present Example demonstrated the case where the skin 100 was formed in one layer, on the surface (surface inside the skin 100 formed in the bag shape) on the side in contact with the urethane foam 150 of the skin 100, 50 μm or less, More preferably, a thin resin layer 1001 having a thickness of 20 to 30 μm or less may be formed.

  By forming the thin resin layer 1011 in this way, the urethane foam 150 is dyed onto the skin 100 while ensuring flexibility that is almost the same as when the skin 100 described in this embodiment is formed as a single layer. It is possible to prevent the appearance of the headrest 200 from being deteriorated and to prevent the touch feeling from being impaired.

  Further, the surface of the thin resin film is treated by corona discharge and the film surface is subjected to a modification treatment, thereby forming fine irregularities on the surface of the film and improving the adhesion to the urethane foam 150. I can do it. As a result, the slice 121 and the urethane foam 150 are more strongly bonded, and the turn-up of the folded portion can be further reduced.

  As mentioned above, although the invention made by the present inventor has been specifically described based on the embodiments, it is needless to say that the present invention is not limited to the above embodiments and can be variously modified without departing from the gist thereof. Yes. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.

  DESCRIPTION OF SYMBOLS 100 ... Skin 110, 120 ... Skin member 111, 121 ... Section 122 ... Hole 130 ... Stay 140 ... Nozzle 141, 142, 143 ... Cut 150 ... Urethane foam 200 ... headrest 210 ... stitching part 220 ... opening part 230 ... cover.

Claims (6)

A headrest for a vehicle seat,
A skin part formed by overlapping and sewing the skin members into a bag shape;
Urethane foam filled in the skin part,
A stay having a pair of legs extending from the inside of the urethane foam to the outside of the skin, and the skin is
It has a portion that is not stitched to a part of the overlapped portion of the skin member,
The skin member is
The first skin part extending from the side of one skin member of the part where the skin member is overlapped in the part that is not stitched and the skin member in the part that is not stitched and folded back inside the skin part Near the ends of the first slice portion and both sides along the folded direction by extending from the other skin member side of the overlapped portion and overlapping the first slice portion inside the skin portion And the second section portion is bonded to the urethane foam, the second section portion has a hole formed therein, and the folded back portion. The first section is bonded to the urethane foam through the hole formed in the second section, and is a headrest for a vehicle seat.   The headrest for a vehicle seat according to claim 1, wherein the skin member is formed of one layer of woven fabric, knitted fabric, leather or synthetic leather.   2. The headrest for a vehicle seat according to claim 1, wherein a resin film is formed on a side of the skin member in contact with the urethane foam.   The headrest for a vehicle seat according to claim 1, wherein a cut for passing a nozzle for supplying the urethane foam material is formed in the skin portion in the second section portion. A headrest for a vehicle seat, wherein a mesh-like cover is attached to a portion covering the cut.   2. The vehicle seat headrest according to claim 1, wherein a part of the portion where the skin members are overlapped has a width of 50 mm to 90 mm. Headrest.   3. The vehicle seat headrest according to claim 2, wherein the hole formed in the second section has a diameter of 3 mm to 10 mm.

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