JP2018134798A - Duct-containing seat pad and manufacturing method thereof - Google Patents

Duct-containing seat pad and manufacturing method thereof Download PDF

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JP2018134798A
JP2018134798A JP2017030854A JP2017030854A JP2018134798A JP 2018134798 A JP2018134798 A JP 2018134798A JP 2017030854 A JP2017030854 A JP 2017030854A JP 2017030854 A JP2017030854 A JP 2017030854A JP 2018134798 A JP2018134798 A JP 2018134798A
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duct
lower mold
magnetic member
magnet
seat pad
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JP6873734B2 (en
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佳宏 犬飼
Yoshihiro Inukai
佳宏 犬飼
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Inoac Corp
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Inoue MTP KK
Inoac Corp
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  • Molding Of Porous Articles (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a duct-containing seat pad capable of suppressing lifting of a duct formed from a sheet material and a method of manufacturing the same.SOLUTION: In a method of manufacturing a duct-containing seat pad 10 according to the present invention, a lower mold protrusion 43 protruding from a molding surface 42M of a lower mold 42 of a foam molding die 40 is inserted through a blowout port 25 of the duct 20, and the duct 20 is set to the lower mold 42, and the blowout port 25 is closed by the lower mold protrusion 43, and a foamed resin material 50 is injected into the foam molding die 40 to foam. The duct 20 is formed of a sheet material 30. A portion of the lower mold protrusion 43 is made of a magnet 44, and at a portion of the duct 20 opposed to the magnet 44 of the lower mold protrusion 43 when the duct 20 is set on the lower mold 42, a magnetic member 27 is attached. When the duct 20 is set on the lower mold 42, the magnetic member 27 attached to the duct 20 and the magnet 44 of the lower mold protrusion 43 are magnetically coupled to each other.SELECTED DRAWING: Figure 6

Description

本発明は、シートパッド内にダクトが埋設されたダクト入りシートパッド及びその製造方法に関する。   The present invention relates to a seat pad with a duct in which a duct is embedded in a seat pad and a manufacturing method thereof.

特許文献１に示されるダクト入りシートパッドの製造方法では、発泡成形金型の下型にダクトをセットして、ダクトの吹出口を下型の成形面から突出する下型突部にて閉塞する。そして、下型に発泡樹脂原料を注入してから発泡成形金型を型閉じして、発泡樹脂原料を発泡させる。   In the method of manufacturing a seat pad with a duct shown in Patent Document 1, a duct is set in a lower mold of a foam molding die, and a blowout port of the duct is closed by a lower mold protrusion protruding from a molding surface of the lower mold. . Then, after injecting the foamed resin raw material into the lower mold, the foam molding die is closed to foam the foamed resin raw material.

特許第５６３７５５６号（段落［００２２］〜［００２６］、［００２８］、図５，６）Japanese Patent No. 5673556 (paragraphs [0022] to [0026], [0028], FIGS. 5 and 6)

ところで、近年、ダクトの軽量化を図るために、ダクトを発泡シートや不織布等のシート材から形成することが提案されている。しかしながら、シート材から形成されたダクトは剛性が低いため、そのダクトを特許文献１に示されたダクト入りシートパッドの製造方法に用いると、発泡樹脂原料の発泡圧によって下型にセットされたダクトが浮き上がり、吹出口からダクト内に発泡樹脂が入り込むという問題があった。   Incidentally, in recent years, in order to reduce the weight of the duct, it has been proposed to form the duct from a sheet material such as a foamed sheet or a nonwoven fabric. However, since the duct formed from the sheet material has low rigidity, when the duct is used in the manufacturing method of the seat pad with duct shown in Patent Document 1, the duct is set in the lower mold by the foaming pressure of the foamed resin material. There was a problem that the foamed resin entered the duct from the outlet.

本発明は、上記事情に鑑みてなされたもので、シート材から形成されたダクトの浮き上がりを抑制することが可能なダクト入りシートパッド及びその製造方法の提供を目的とする。   This invention is made | formed in view of the said situation, and aims at provision of the seat pad containing a duct which can suppress the lifting of the duct formed from the sheet | seat material, and its manufacturing method.

上記目的を達成するためになされた請求項１の発明は、発泡成形金型における下型の成形面から突出する下型突部をダクトの吹出口に挿通させて前記ダクトを前記下型にセットすると共に前記下型突部にて前記吹出口を塞ぎ、前記発泡成形金型に発泡樹脂原料を注入して発泡させるダクト入りシートパッドの製造方法であって、前記ダクトは、シート材から形成され、前記下型突部の一部をマグネットで構成しておくと共に、前記ダクトのうち前記ダクトが前記下型にセットされるときに前記下型突部の前記マグネットと対向する部分に、磁性部材を取り付けておき、前記ダクトを前記下型にセットするときに、前記ダクトの前記磁性部材と前記下型突部の前記マグネットを磁気結合させる。   In order to achieve the above object, according to the first aspect of the present invention, a lower mold protrusion protruding from a molding surface of a lower mold in a foam molding die is inserted into a duct outlet and the duct is set in the lower mold. And a method of manufacturing a duct-filled seat pad that closes the blow-out opening at the lower mold protrusion and injects a foamed resin raw material into the foaming mold to cause foaming, wherein the duct is formed from a sheet material. In addition, a part of the lower mold protrusion is made of a magnet, and a magnetic member is formed on a portion of the duct that faces the magnet of the lower mold protrusion when the duct is set on the lower mold. When the duct is set on the lower mold, the magnetic member of the duct and the magnet of the lower mold protrusion are magnetically coupled.

請求項２の発明は、請求項１に記載のダクト入りシートパッドの製造方法において、前記磁性部材を、前記ダクトの外面に取り付ける。   According to a second aspect of the present invention, in the method for manufacturing a ducted seat pad according to the first aspect, the magnetic member is attached to an outer surface of the duct.

請求項３の発明は、請求項１又は２に記載のダクト入りシートパッドの製造方法において、前記マグネットを前記下型突部の突出方向の先端部に埋設し、前記磁性部材を前記ダクトのうち前記吹出口の軸方向で前記吹出口と重なる部位に取り付けておくと共に、前記下型突部の外周面に環状溝を形成しておき、前記下型に前記ダクトをセットするにあたり、前記下型突部を前記吹出口に突入させて前記マグネットと前記磁性部材を磁気結合させると共に、前記吹出口の開口縁を前記環状溝に係合させる。   According to a third aspect of the present invention, in the method for manufacturing a duct-equipped seat pad according to the first or second aspect, the magnet is embedded in a front end portion in the protruding direction of the lower mold protrusion, and the magnetic member is included in the duct. At the time of setting the duct on the lower mold, the lower mold is formed by forming an annular groove on the outer peripheral surface of the lower mold projection while being attached to a portion overlapping with the blow outlet in the axial direction of the blow outlet. A protrusion is inserted into the air outlet to magnetically couple the magnet and the magnetic member, and an opening edge of the air outlet is engaged with the annular groove.

請求項４の発明は、請求項１又は２に記載のダクト入りシートパッドの製造方法において、前記磁性部材を、前記吹出口を囲むように取り付けておくと共に、前記下型突部に基端側を段付き状に拡径する段差を設けて、その段差より基端側に配される大径部の先端部位を前記マグネットで構成しておき、前記ダクトを前記下型にセットするにあたり、前記下型突部のうち前記段差より先端側に配される小径部を前記吹出口に突入させ、前記大径部を前記吹出口の開口縁に当接させて前記マグネットと前記磁性部材を磁気結合させる。   According to a fourth aspect of the present invention, in the method for manufacturing a ducted seat pad according to the first or second aspect, the magnetic member is attached so as to surround the air outlet, and the base end side is provided on the lower mold protrusion. A step that expands the diameter in a stepped shape, the tip portion of the large-diameter portion disposed on the proximal side from the step is configured with the magnet, and when setting the duct to the lower mold, Of the lower mold protrusion, a small-diameter portion arranged on the tip side from the step is inserted into the air outlet, and the large-diameter portion is brought into contact with the opening edge of the air outlet to magnetically couple the magnet and the magnetic member. Let

請求項５の発明は、シートパッド内にダクトが埋設されたダクト入りシートパッドにおいて、前記ダクトは、シート材から形成され、前記ダクトのうち吹出口を囲む部分又は前記吹出口の軸方向で前記吹出口と重なる部位に磁性部材が取り付けられている。   According to a fifth aspect of the present invention, in the seat pad with a duct in which the duct is embedded in the seat pad, the duct is formed of a sheet material, and the duct surrounds the outlet or the axial direction of the outlet. A magnetic member is attached to a portion overlapping the air outlet.

請求項６の発明は、請求項５に記載のダクト入りシートパッドにおいて、前記磁性部材は、前記ダクトの外面に取り付けられている。   According to a sixth aspect of the present invention, in the seat pad with a duct according to the fifth aspect, the magnetic member is attached to an outer surface of the duct.

［請求項１，５の発明］
本発明では、発泡成形金型の下型の成形面から突出する下型突部の一部をマグネットで構成することで、ダクトを下型にセットするときに、ダクトに取り付けた磁性部材をマグネットに磁気結合させることが可能となる。これにより、ダクトの下型への固定の安定化が図られ、シート材から形成されたダクトの浮き上がりが抑制される。 [Inventions of Claims 1 and 5]
In the present invention, a part of the lower mold protrusion protruding from the molding surface of the lower mold of the foam molding die is configured with a magnet, so that when the duct is set on the lower mold, the magnetic member attached to the duct is magnetized. Can be magnetically coupled to each other. Thereby, stabilization to the lower mold | type of a duct is achieved, and the lifting of the duct formed from the sheet | seat material is suppressed.

［請求項２，６の発明］
本発明によれば、磁性部材がダクト内を通過する気体の通気抵抗となることが抑制される。 [Inventions of Claims 2 and 6]
According to the present invention, it is possible to suppress the magnetic member from having a gas flow resistance through the duct.

［請求項３の発明］
本発明では、下型突部のマグネットと環状溝でダクトを固定することが可能となる。即ち、１つの下型突部につき、ダクトの２箇所を固定することが可能となる。これにより、下型突部によるダクトの固定の安定化が図られる。 [Invention of claim 3]
In the present invention, the duct can be fixed by the magnet of the lower mold protrusion and the annular groove. That is, it is possible to fix two places of the duct per one lower mold protrusion. This stabilizes the fixing of the duct by the lower mold protrusion.

［請求項４の発明］
本発明では、マグネットと磁性部材の磁気結合によって、ダクトの下型への固定と吹出口の閉塞の両方を達成可能となる。 [Invention of claim 4]
In the present invention, both the fixing of the duct to the lower mold and the closing of the air outlet can be achieved by the magnetic coupling of the magnet and the magnetic member.

本発明の第１実施形態に係るダクト入りシートパッドの平面図The top view of the sheet pad with a duct concerning a 1st embodiment of the present invention. ダクト入りシートパッドの断面図Cross section of ducted seat pad ダクト入りシートパッドのＡ−Ａ断面図AA sectional view of a seat pad with duct ダクトの製造工程を示す断面図Sectional view showing the manufacturing process of the duct ダクト入りシートパッドの製造工程を示す断面図Sectional drawing which shows the manufacturing process of a seat pad with a duct ダクト入りシートパッドの製造工程を示す断面図Sectional drawing which shows the manufacturing process of a seat pad with a duct ダクト入りシートパッドの製造工程を示す断面図Sectional drawing which shows the manufacturing process of a seat pad with a duct ダクト入りシートパッドの製造工程を示す断面図Sectional drawing which shows the manufacturing process of a seat pad with a duct 第２実施形態に係るダクト入りシートパッドの断面図Sectional drawing of the seat pad with a duct concerning 2nd Embodiment ダクト及び下型突部の断面図Sectional view of duct and lower mold protrusion 他の実施形態に係るダクト及び下型突部の断面図Sectional drawing of the duct and lower mold | type protrusion which concern on other embodiment

［第１実施形態］
以下、本発明の第１実施形態を図面に基づいて説明する。図１，２に示されるように、本実施形態のダクト入りシートパッド１０は、例えば、車両用シートの背もたれ部に用いられるバックパッドや着座部に用いられるクッションパッドであって、シートパッド１１にダクト２０を内蔵した構造になっている。本実施形態では、ダクト入りシートパッド１０をクッションパッドに適用した例について説明する。 [First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the seat pad 10 with a duct according to the present embodiment is, for example, a back pad used for a backrest portion of a vehicle seat or a cushion pad used for a seating portion. The duct 20 is built in. This embodiment demonstrates the example which applied the seat pad 10 with a duct to the cushion pad.

図１，２に示されるように、ダクト２０は、シートパッド１１の左右方向に延びる横辺部２１と、横辺部２１の両端部の各々から２股に分岐してシートパッド１１の前後方向に延びる１対の縦辺部２２，２２と、を有している。ダクト２０は、シートパッド１１の下面寄り位置に埋設されている（図２参照）。ダクト２０の横辺部２１の中央部からは、後方に向かって空気導入部２３が張り出している。そして、空気導入部２３の下面には、導入口２４が形成されている。また、ダクト２０の横辺部２１及び縦辺部２２の上面には、複数の吹出口２５が形成されている。導入口２４は、ダクト２０内に空気を導入するためのものであり、吹出口２５は、ダクト２０内の空気を排出するためのものである。   As shown in FIGS. 1 and 2, the duct 20 is bifurcated from each of a lateral side portion 21 extending in the left-right direction of the seat pad 11 and both end portions of the lateral side portion 21, and the front-rear direction of the seat pad 11. And a pair of vertical side portions 22, 22 extending in the vertical direction. The duct 20 is embedded near the lower surface of the seat pad 11 (see FIG. 2). From the central portion of the lateral side portion 21 of the duct 20, an air introduction portion 23 projects toward the rear. An introduction port 24 is formed on the lower surface of the air introduction portion 23. A plurality of air outlets 25 are formed on the upper surfaces of the horizontal side portion 21 and the vertical side portion 22 of the duct 20. The inlet 24 is for introducing air into the duct 20, and the outlet 25 is for discharging the air in the duct 20.

図３に示されるように、ダクト２０は、溝形状に成形された１対のシート材３０，３０を接合してなる。溝形状に成形された１対のシート材３０，３０は、溝開口が突き合わされるように配置されて、その溝開口の縁部同士が接合されている。各シート材３０は、単層構造をなしていてもよいし、積層構造をなしていてもよい。本実施形態の例では、シート材３０は、積層構造をなし、独立気泡構造の発泡体からなる内側層３１と、連続気泡構造の発泡体又は不織布からなる外側層３２とから構成されている。   As shown in FIG. 3, the duct 20 is formed by joining a pair of sheet materials 30, 30 formed in a groove shape. The pair of sheet materials 30 and 30 formed in a groove shape are arranged so that the groove openings are abutted against each other, and the edges of the groove openings are joined to each other. Each sheet material 30 may have a single layer structure or may have a laminated structure. In the example of the present embodiment, the sheet material 30 has a laminated structure, and includes an inner layer 31 made of a foam having a closed cell structure and an outer layer 32 made of a foam or nonwoven fabric having an open cell structure.

ダクト２０の底壁２０Ｂの外面には、磁性部材２７が取り付けられている。磁性部材２７は、例えば、フェライトシートで構成され、接着剤によって底壁２０Ｂの外面に固定されている。また、磁性部材２７は、吹出口２５の軸方向で吹出口２５に重ねて配置されている。   A magnetic member 27 is attached to the outer surface of the bottom wall 20B of the duct 20. The magnetic member 27 is made of, for example, a ferrite sheet, and is fixed to the outer surface of the bottom wall 20B with an adhesive. Further, the magnetic member 27 is disposed so as to overlap the air outlet 25 in the axial direction of the air outlet 25.

図１，２に示されるように、シートパッド１１は、例えば、ポリウレタン等の発泡樹脂からなり、ダクト入りシートパッド１０の主要部を構成する。シートパッド１１の上面には、ダクト２０の吹出口２５に連通する複数の通気凹部１２が設けられている。そして、ダクトの吹出口２５から排出された空気が通気凹部１２から送給される。   As shown in FIGS. 1 and 2, the seat pad 11 is made of, for example, a foamed resin such as polyurethane and constitutes a main part of the duct-equipped seat pad 10. A plurality of ventilation recesses 12 communicating with the air outlet 25 of the duct 20 are provided on the upper surface of the seat pad 11. And the air discharged | emitted from the blower outlet 25 of a duct is sent from the ventilation recessed part 12. As shown in FIG.

次に、ダクト入りシートパッド１０の製造方法について説明する。ダクト入りシートパッド１０の製造にあたっては、まず、ダクト２０が製造される。ダクト２０の製造にあたっては、まず、図４（Ａ）に示されるように、溝形状に成形された１対のシート材３０，３０が準備される。シート材３０の溝形状への成形は、真空成形や圧空成形、熱プレス成形によって行われる。溝形状に成形された１対のシート材３０，３０のうち一方のシート材３０における溝底の所定部位には、開口３０Ａが形成されている。図４（Ｂ）に示されるように、溝形状の１対のシート材３０，３０における溝開口の縁部同士が接合され、ダクト２０が完成する。このとき、一方のシート材３０の開口３０Ａによってダクト２０の吹出口２５が形成され、他方のシート材３０によってダクト２０の底壁２０Ｂが形成される。そして、ダクト２０の底壁２０Ｂの外面のうち吹出口２５と重なる部分に、磁性部材２７が貼り付けられる。   Next, a method for manufacturing the ducted seat pad 10 will be described. In manufacturing the seat pad 10 with duct, first, the duct 20 is manufactured. In manufacturing the duct 20, first, as shown in FIG. 4A, a pair of sheet materials 30 and 30 formed in a groove shape are prepared. The sheet material 30 is formed into a groove shape by vacuum forming, pressure forming, or hot press forming. An opening 30 </ b> A is formed at a predetermined portion of the groove bottom in one sheet material 30 of the pair of sheet materials 30, 30 formed in a groove shape. As shown in FIG. 4 (B), the edges of the groove openings in the pair of groove-shaped sheet materials 30 and 30 are joined to complete the duct 20. At this time, the air outlet 25 of the duct 20 is formed by the opening 30 </ b> A of one sheet material 30, and the bottom wall 20 </ b> B of the duct 20 is formed by the other sheet material 30. And the magnetic member 27 is affixed on the part which overlaps with the blower outlet 25 among the outer surfaces of the bottom wall 20B of the duct 20. FIG.

ダクト２０が完成すると、図５に示されるように、ダクト２０が発泡成形金型４０にセットされる。発泡成形金型４０は、上型４１と下型４２とからなり、ダクト２０は、下型４２にセットされる。具体的には、下型４２には、発泡成形金型４０のキャビティ４０Ｃ（図７）の一部を構成する成形凹部４２Ａが形成され、その成形凹部４２Ａの内面が成形面４２Ｍとなっている。下型４２の成形面４２Ｍからは、ダクト２０の吹出口２５に対応した複数の下型突部４３が突出している。そして、ダクト２０の吹出口２５が下型突部４３と嵌合することによりダクト２０が下型４２に位置決めされ、吹出口２５が下型突部４３によって塞がれる。なお、ダクト２０の導入口２４は、蓋部材２４Ａによって塞がれる。   When the duct 20 is completed, the duct 20 is set in the foaming mold 40 as shown in FIG. The foam molding die 40 includes an upper die 41 and a lower die 42, and the duct 20 is set on the lower die 42. Specifically, the lower mold 42 is formed with a molding recess 42A that constitutes a part of the cavity 40C (FIG. 7) of the foam molding die 40, and the inner surface of the molding recess 42A is a molding surface 42M. . A plurality of lower mold protrusions 43 corresponding to the air outlet 25 of the duct 20 protrude from the molding surface 42 </ b> M of the lower mold 42. Then, the duct 20 is positioned on the lower mold 42 by fitting the air outlet 25 of the duct 20 with the lower mold protrusion 43, and the air outlet 25 is blocked by the lower mold protrusion 43. The introduction port 24 of the duct 20 is closed by the lid member 24A.

詳細には、図６に示されるように、下型突部４３には、基端側を段付き状に拡径する段差４３Ｄが設けられている。そして、下型突部４３のうち段差４３Ｄより基端側に配される大径部４３Ａが吹出口２５の開口縁に突き当てられると共に、下型突部４３のうち段差４３Ｄより先端側に配される小径部４３Ｂが吹出口２５に突入する。なお、小径部４３Ｂは、先端側へ向かうにつれて縮径されるドーム状をなしている。   Specifically, as shown in FIG. 6, the lower mold protrusion 43 is provided with a step 43 </ b> D that expands the base end side in a stepped shape. The large-diameter portion 43A disposed on the base end side of the step 43D in the lower mold protrusion 43 is abutted against the opening edge of the outlet 25, and is disposed on the distal end side of the step 43D in the lower mold protrusion 43. The small-diameter portion 43 </ b> B that enters is rushed into the outlet 25. In addition, the small diameter part 43B has comprised the dome shape diameter-reduced as it goes to the front end side.

ここで、下型突部４３の先端部は、マグネット４４で構成されている。そして、マグネット４４がダクト２０の磁性部材２７と磁気結合する。なお、マグネット４４は、下型突部４３の先端部に形成された先端凹部４４Ａに埋設されている。   Here, the tip of the lower mold protrusion 43 is constituted by a magnet 44. The magnet 44 is magnetically coupled to the magnetic member 27 of the duct 20. The magnet 44 is embedded in a tip recess 44 </ b> A formed at the tip of the lower mold protrusion 43.

また、下型突部４３の外周面（詳細には、小径部４３Ｂにおける大径部４３Ａ側の端部の外周面）には、環状溝４５が形成されていて、この環状溝４５と吹出口２５の開口縁とが係合する。なお、下型突部４３は、環状溝４５が形成されていない構成であってもよい。   An annular groove 45 is formed on the outer peripheral surface of the lower mold protrusion 43 (specifically, the outer peripheral surface of the end portion on the large diameter portion 43A side of the small diameter portion 43B). 25 opening edges engage. The lower mold protrusion 43 may be configured such that the annular groove 45 is not formed.

ダクト２０が下型４２にセットされると、図７に示されるように、下型４２の成形凹部４２Ａに発泡樹脂原料５０が注入されて、発泡成形金型４０が型閉じされる。次いで、図８に示されるように、発泡樹脂原料５０が発泡成形されてシートパッド１１が形成される。そして、発泡成形金型４０から成形体が外されると、ダクト入りシートパッド１０（図２）が完成する。   When the duct 20 is set in the lower mold 42, as shown in FIG. 7, the foamed resin material 50 is injected into the molding recess 42A of the lower mold 42, and the foam molding die 40 is closed. Next, as shown in FIG. 8, the foamed resin material 50 is foam-molded to form the seat pad 11. And if a molded object is removed from the foam molding die 40, the sheet pad 10 with a duct (FIG. 2) will be completed.

本実施形態のダクト入りシートパッド１０の構成及び製造方法の説明は以上である。次に、本実施形態の作用効果について説明する。   The description of the configuration and the manufacturing method of the ducted seat pad 10 of the present embodiment is as described above. Next, the effect of this embodiment is demonstrated.

本実施形態では、発泡成形金型４０の下型４２の成形面４２Ｍから突出する下型突部４３の一部をマグネット４４で構成することで、下型突部４３にてダクト２０の吹出口２５を塞ぐときに、ダクト２０に取り付けた磁性部材２７をマグネット４４に磁気結合させることができる。これにより、ダクト２０の下型４２への固定の安定化が図られ、シート材３０から形成されたダクト２０の浮き上がりが抑制される。そして、ダクト２０の吹出口２５からダクト２０内に発泡樹脂原料５０が入り込むことを防止することが可能となる。しかも、本実施形態では、磁性部材２７がダクト２０の外面に取り付けられているので、磁性部材２７がダクト２０内を通過する気体の通気抵抗となることが抑制される。   In the present embodiment, a part of the lower mold protrusion 43 that protrudes from the molding surface 42M of the lower mold 42 of the foam molding die 40 is configured by the magnet 44, so that the lower mold protrusion 43 has the outlet of the duct 20 at the lower mold protrusion 43. When closing 25, the magnetic member 27 attached to the duct 20 can be magnetically coupled to the magnet 44. Thereby, the fixation to the lower mold | type 42 of the duct 20 is stabilized, and the lifting of the duct 20 formed from the sheet material 30 is suppressed. And it becomes possible to prevent the foamed resin raw material 50 from entering the duct 20 from the outlet 25 of the duct 20. In addition, in the present embodiment, since the magnetic member 27 is attached to the outer surface of the duct 20, it is possible to suppress the magnetic member 27 from having a gas flow resistance through the inside of the duct 20.

また、本実施形態では、下型突部４３のマグネット４４と環状溝４５でダクト２０を固定することが可能となる。即ち、本実施形態では、１つの下型突部４３につき、ダクト２０の２箇所を固定することが可能となる。これにより、下型突部４３によるダクト２０の固定の安定化が図られる。   In the present embodiment, the duct 20 can be fixed by the magnet 44 and the annular groove 45 of the lower mold protrusion 43. That is, in this embodiment, it is possible to fix two places of the duct 20 per one lower mold protrusion 43. Thereby, the fixation of the duct 20 by the lower mold protrusion 43 is stabilized.

［第２実施形態］
以下、本発明の第２実施形態を図面に基づいて説明する。本実施形態は、ダクト２０における磁性部材２７の配置及び下型突部４３におけるマグネット４４の配置が上記第１実施形態と異なっている。具体的には、図９に示されるように、本実施形態では、磁性部材２７がダクト２０の吹出口２５の開口縁に取り付けられている。また、図１０に示されるように、マグネット４４は、下型突部４３における大径部４３Ａの先端部位を構成する。 [Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. This embodiment is different from the first embodiment in the arrangement of the magnetic member 27 in the duct 20 and the arrangement of the magnet 44 in the lower mold protrusion 43. Specifically, as shown in FIG. 9, in this embodiment, the magnetic member 27 is attached to the opening edge of the air outlet 25 of the duct 20. Also, as shown in FIG. 10, the magnet 44 constitutes the tip portion of the large diameter portion 43 </ b> A in the lower mold protrusion 43.

なお、詳細には、下型突部４３は、下型４２の成形面４２Ｍから突出する第１突部構成体４７に、マグネット４４と、第２突部構成体４８を固定してなる。第１突部構成体４７の先端面には、固定凹部４７Ａが設けられている。また、第２突部構成体４８は、下型突部４３の小径部４３Ｂを構成する本体部４８Ｈから基端側に突起４８Ｔが突出した構造になっている。そして、突起４８Ｔが固定凹部４７Ａに受容された状態で、第２突部構成体４８が第１突部構成体４７に固定される。マグネット４４は、環状に形成されて突起４８Ｔと嵌合し、第２突部構成体４８の本体部４８Ｈと第１突部構成体４７とに挟まれる。そして、第１突部構成体４７とマグネット４４とにより下型突部４３の大径部４３Ａが構成され、マグネット４４が大径部４３Ａの先端部位を構成する。なお、上記第１実施形態のように、下型突部４３に環状溝４５を設けてもよい。   Specifically, the lower mold protrusion 43 is formed by fixing a magnet 44 and a second protrusion structure 48 to a first protrusion structure 47 that protrudes from the molding surface 42M of the lower mold 42. A fixed recess 47 </ b> A is provided on the distal end surface of the first protruding portion structure 47. Further, the second projecting portion structure 48 has a structure in which a projection 48T protrudes from the main body portion 48H constituting the small diameter portion 43B of the lower mold projecting portion 43 toward the base end side. Then, the second projecting component 48 is fixed to the first projecting component 47 in a state where the projection 48T is received in the fixing recess 47A. The magnet 44 is formed in an annular shape, is fitted to the protrusion 48T, and is sandwiched between the main body portion 48H of the second protrusion structure 48 and the first protrusion structure 47. The first protrusion component 47 and the magnet 44 constitute a large-diameter portion 43A of the lower mold protrusion 43, and the magnet 44 constitutes the tip portion of the large-diameter portion 43A. Note that the annular groove 45 may be provided in the lower mold protrusion 43 as in the first embodiment.

本実施形態では、上記第１実施形態と同様にして、ダクト２０が製造される。ここで、本実施形態では、ダクト２０の吹出口２５の開口縁に、磁性部材２７が取付けられる。そして、ダクト２０を下型４２にセットするにあたって、下型突部４３の小径部４３Ｂをダクト２０の吹出口２５に突入させると共に、下型突部４３の大径部４３Ａを吹出口２５の開口縁に当接させて、マグネット４４と磁性部材２７を磁気結合させる。   In the present embodiment, the duct 20 is manufactured in the same manner as in the first embodiment. Here, in this embodiment, the magnetic member 27 is attached to the opening edge of the air outlet 25 of the duct 20. Then, when setting the duct 20 to the lower mold 42, the small diameter portion 43 </ b> B of the lower mold protrusion 43 is caused to enter the air outlet 25 of the duct 20, and the large diameter portion 43 </ b> A of the lower mold protrusion 43 is opened to the air outlet 25. The magnet 44 and the magnetic member 27 are magnetically coupled by being brought into contact with the edge.

本実施形態によれば、上記第１実施形態と同様の効果を奏することが可能となる。また、本実施形態によれば、マグネット４４と磁性部材２７の磁気結合によって、ダクト２０の下型４２への固定と吹出口２５の閉塞の両方を達成可能となる。   According to the present embodiment, it is possible to achieve the same effect as the first embodiment. Further, according to the present embodiment, both the fixing of the duct 20 to the lower mold 42 and the closing of the air outlet 25 can be achieved by the magnetic coupling between the magnet 44 and the magnetic member 27.

［他の実施形態］
本発明は、上記実施形態に限定されるものではなく、例えば、以下に説明するような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 [Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

（１）上記第１実施形態において、図１１に示されるように、ダクト２０のうち吹出口２５の軸方向で吹出口２５と重なる部分に、貫通孔２９が形成されていてもよい。この場合、磁性部材２７は、貫通孔２９を全体的に又は部分的に覆うようにダクト２０に取り付けられる。そして、ダクト２０を下型４２にセットするにあたって、下型突部４３の小径部４３Ｂをダクト２０の吹出口２５に突入させ、下型突部４３の先端部と磁性部材２７を当接させてマグネット４４と磁性部材２７を磁気結合させる。本実施形態では、貫通孔２９が設けられているので、シート材３０を介してマグネット４４と磁性部材２７とが磁気結合することが困難なほどシート材３０が厚い場合でも、マグネット４４と磁性部材２７とを容易に磁気結合させることができる。なお、貫通孔２９が磁性部材２７によって部分的に覆われる場合には、シートパッド１１を形成するにあたり、貫通孔２９を塞ぐための蓋部材をダクト２０に取り付ければよい。   (1) In the first embodiment, as shown in FIG. 11, a through hole 29 may be formed in a portion of the duct 20 that overlaps with the air outlet 25 in the axial direction of the air outlet 25. In this case, the magnetic member 27 is attached to the duct 20 so as to entirely or partially cover the through hole 29. When setting the duct 20 to the lower mold 42, the small-diameter portion 43 </ b> B of the lower mold protrusion 43 is inserted into the air outlet 25 of the duct 20, and the tip of the lower mold protrusion 43 and the magnetic member 27 are brought into contact with each other. The magnet 44 and the magnetic member 27 are magnetically coupled. In the present embodiment, since the through-hole 29 is provided, even when the sheet material 30 is so thick that it is difficult to magnetically couple the magnet 44 and the magnetic member 27 via the sheet material 30, the magnet 44 and the magnetic member 27 can be easily magnetically coupled. When the through hole 29 is partially covered by the magnetic member 27, a lid member for closing the through hole 29 may be attached to the duct 20 when forming the seat pad 11.

（２）上記実施形態では、磁性部材２７が、ダクト２０の外面に取り付けられていたが、ダクト２０の内面に取り付けられていてもよい。なお、上記実施形態のように、磁性部材２７がダクト２０の外面に取り付けられる場合、磁性部材２７がダクト２０内を通過する気体の通気抵抗となることが抑制される。   (2) In the above embodiment, the magnetic member 27 is attached to the outer surface of the duct 20, but may be attached to the inner surface of the duct 20. In addition, when the magnetic member 27 is attached to the outer surface of the duct 20 as in the above-described embodiment, the magnetic member 27 is prevented from having a gas flow resistance through the inside of the duct 20.

（３）上記第２実施形態において、さらに、上記第１実施形態のように、下型突部４３の先端部に設けられたマグネット４４と、ダクト２０のうち吹出口２５の軸方向で吹出口２５と重なる部位に取り付けられた磁性部材２７と、が備えられてもよい。   (3) In the second embodiment, as in the first embodiment, the magnet 44 provided at the tip of the lower mold projection 43 and the outlet in the axial direction of the outlet 25 of the duct 20. And a magnetic member 27 attached to a portion overlapping 25.

（４）上記第２実施形態では、吹出口２５を囲むようにダクト２０に取り付けられた磁性部材２７が、環状の１つの部材から構成されていたが、吹出口２５の周方向に並んだ複数の部材から構成されていてもよい。   (4) In the said 2nd Embodiment, although the magnetic member 27 attached to the duct 20 so that the blower outlet 25 might be enclosed was comprised from one cyclic | annular member, the plurality arranged in the circumferential direction of the blower outlet 25 You may be comprised from the member of.

１０ ダクト入りシートパッド
１１ シートパッド
２０ ダクト
２５ 吹出口
２７ 磁性部材
３０ シート材
４０ 発泡成形金型
４２ 下型
４３ 下型突部
４４ マグネット DESCRIPTION OF SYMBOLS 10 Duct seat pad 11 Seat pad 20 Duct 25 Outlet 27 Magnetic member 30 Sheet material 40 Foaming mold 42 Lower mold 43 Lower mold protrusion 44 Magnet

Claims (6)

発泡成形金型における下型の成形面から突出する下型突部をダクトの吹出口に挿通させて前記ダクトを前記下型にセットすると共に前記下型突部にて前記吹出口を塞ぎ、前記発泡成形金型に発泡樹脂原料を注入して発泡させるダクト入りシートパッドの製造方法であって、
前記ダクトは、シート材から形成され、
前記下型突部の一部をマグネットで構成しておくと共に、
前記ダクトのうち前記ダクトが前記下型にセットされるときに前記下型突部の前記マグネットと対向する部分に、磁性部材を取り付けておき、
前記ダクトを前記下型にセットするときに、前記ダクトの前記磁性部材と前記下型突部の前記マグネットを磁気結合させる。 The lower mold protrusion protruding from the molding surface of the lower mold in the foam molding die is inserted into the air outlet of the duct to set the duct to the lower mold and close the air outlet at the lower mold protrusion, A method for producing a duct-filled seat pad in which a foamed resin material is injected into a foaming mold and foamed,
The duct is formed from a sheet material,
While configuring a part of the lower mold protrusion with a magnet,
A magnetic member is attached to a portion of the duct that faces the magnet of the lower mold protrusion when the duct is set to the lower mold,
When the duct is set on the lower mold, the magnetic member of the duct and the magnet of the lower mold protrusion are magnetically coupled. 請求項１に記載のダクト入りシートパッドの製造方法において、
前記磁性部材を、前記ダクトの外面に取り付ける。 In the manufacturing method of the seat pad with a duct according to claim 1,
The magnetic member is attached to the outer surface of the duct. 請求項１又は２に記載のダクト入りシートパッドの製造方法において、
前記マグネットを前記下型突部の突出方向の先端部に埋設し、前記磁性部材を前記ダクトのうち前記吹出口の軸方向で前記吹出口と重なる部位に取り付けておくと共に、
前記下型突部の外周面に環状溝を形成しておき、
前記下型に前記ダクトをセットするにあたり、前記下型突部を前記吹出口に突入させて前記マグネットと前記磁性部材を磁気結合させると共に、前記吹出口の開口縁を前記環状溝に係合させる。 In the manufacturing method of the seat pad with a duct according to claim 1 or 2,
The magnet is embedded in the projecting end of the lower mold protrusion, and the magnetic member is attached to a portion of the duct that overlaps the outlet in the axial direction of the outlet.
An annular groove is formed on the outer peripheral surface of the lower mold protrusion,
In setting the duct on the lower mold, the lower mold protrusion is inserted into the air outlet to magnetically couple the magnet and the magnetic member, and the opening edge of the air outlet is engaged with the annular groove. . 請求項１又は２に記載のダクト入りシートパッドの製造方法において、
前記磁性部材を、前記吹出口を囲むように取り付けておくと共に、
前記下型突部に基端側を段付き状に拡径する段差を設けて、その段差より基端側に配される大径部の先端部位を前記マグネットで構成しておき、
前記ダクトを前記下型にセットするにあたり、前記下型突部のうち前記段差より先端側に配される小径部を前記吹出口に突入させ、前記大径部を前記吹出口の開口縁に当接させて前記マグネットと前記磁性部材を磁気結合させる。 In the manufacturing method of the seat pad with a duct according to claim 1 or 2,
While attaching the magnetic member so as to surround the air outlet,
The lower mold protrusion is provided with a step that expands the base end side in a stepped shape, and the tip portion of the large diameter portion that is arranged on the base end side from the step is configured with the magnet.
When setting the duct to the lower mold, the small-diameter portion of the lower mold protrusion, which is arranged on the tip side of the step, is inserted into the air outlet, and the large-diameter portion is applied to the opening edge of the air outlet. The magnet and the magnetic member are magnetically coupled in contact with each other. シートパッド内にダクトが埋設されたダクト入りシートパッドにおいて、
前記ダクトは、シート材から形成され、
前記ダクトのうち吹出口を囲む部分又は前記吹出口の軸方向で前記吹出口と重なる部位に磁性部材が取り付けられている。 In a seat pad with a duct in which a duct is embedded in the seat pad,
The duct is formed from a sheet material,
A magnetic member is attached to a portion of the duct surrounding the air outlet or a portion overlapping the air outlet in the axial direction of the air outlet. 請求項５に記載のダクト入りシートパッドにおいて、
前記磁性部材は、前記ダクトの外面に取り付けられている。 The ducted seat pad according to claim 5,
The magnetic member is attached to the outer surface of the duct.
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