JP2019024939A - Seat pad and chair seat - Google Patents

Seat pad and chair seat Download PDF

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JP2019024939A
JP2019024939A JP2017146972A JP2017146972A JP2019024939A JP 2019024939 A JP2019024939 A JP 2019024939A JP 2017146972 A JP2017146972 A JP 2017146972A JP 2017146972 A JP2017146972 A JP 2017146972A JP 2019024939 A JP2019024939 A JP 2019024939A
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molded body
foam molded
seating surface
ventilation groove
groove
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JP7189524B2 (en
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健司 熊谷
Kenji Kumagai
健司 熊谷
泰輔 米澤
Yasusuke Yonezawa
泰輔 米澤
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Bridgestone Corp
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Bridgestone Corp
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Abstract

To suppress crush of a ventilation groove when a crew sits.SOLUTION: A seat pad 1 has a seating surface 17 on which a crew sits, and includes a foam molding 11 composed of a synthetic resin material. The foam molding has a ventilation groove 16 formed therein for air conditioning. The foam molding is composed of an upper foam molding 25 having the seating surface, and a lower foam molding 26 in a side of an attachment face 15 opposite to the seating surface. The lower foam molding has a hardness larger than that of the upper foam molding.SELECTED DRAWING: Figure 2

Description

本発明は、シート用パッドおよび座席シートに関するものである。   The present invention relates to a seat pad and a seat.

従来から、乗員が着座する着座面を有するとともに、合成樹脂材料からなる発泡成形体を備えるシート用パッドとして、発泡成形体に空調用の通気溝が形成された構成が知られている。   2. Description of the Related Art Conventionally, a configuration in which a ventilation groove for air conditioning is formed in a foam molded body is known as a pad for a sheet having a seating surface on which an occupant is seated and a foam molded body made of a synthetic resin material.

特開２００７−２２２３９７号公報JP 2007-2222397 A

しかしながら、従来では、乗員の着座時に通気溝が潰れ、所期した空調効果が発揮されないおそれがあった。   However, conventionally, when the occupant is seated, the ventilation groove is crushed, and the desired air conditioning effect may not be exhibited.

この発明は、このような事情を考慮してなされたもので、乗員の着座時に通気溝が潰れるのを抑制することができるシート用パッドおよび座席シートを提供することを目的とする。   The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a seat pad and a seat that can prevent the ventilation groove from being crushed when a passenger is seated.

上記課題を解決して、このような目的を達成するために、本発明のシート用パッドは、乗員が着座する着座面を有するとともに、合成樹脂材料からなる発泡成形体を備え、この発泡成形体に空調用の通気溝が形成されたシート用パッドであって、前記発泡成形体は、前記着座面を有する上部発泡成形体と、前記着座面と反対の取付面側の下部発泡成形体と、からなり、前記下部発泡成形体は、前記上部発泡成形体より硬度が高いことを特徴とする。
本発明の座席シートは、本発明のシート用パッドと、前記発泡成形体の取付面に配設された枠状のフレームと、前記フレームの内側開口を区画し、前記発泡成形体の取付面を支持するワイヤと、を備えることを特徴とする。 In order to solve the above-mentioned problems and achieve such an object, the seat pad of the present invention has a seating surface on which an occupant sits, and includes a foamed molded body made of a synthetic resin material. A foam pad for the air conditioning, wherein the foam molded body includes an upper foam molded body having the seating surface, and a lower foam molded body on the mounting surface side opposite to the seating surface, The lower foamed molded body has a higher hardness than the upper foamed molded body.
The seat of the present invention comprises a seat pad of the present invention, a frame-like frame disposed on the mounting surface of the foam molded body, an inner opening of the frame, and the mounting surface of the foam molded body. And a supporting wire.

本発明によれば、下部発泡成形体が、着座面を有する上部発泡成形体より硬度が高いので、乗員の着座時に発泡成形体に加えられる力を、下部発泡成形体に受け止めさせることが可能になり、良好な乗り心地性を確保しつつ、通気溝が潰れるのを抑制することができる。
しかも、発泡成形体が、上部発泡成形体および下部発泡成形体を備えることで、このような作用効果が奏されることから、例えば、通気溝にパイプを嵌め込むのと比べて、容易に製造することができるとともに、良好な乗り心地性を確実に確保することができる。 According to the present invention, since the lower foam molded body has a higher hardness than the upper foam molded body having a seating surface, it is possible to cause the lower foam molded body to receive the force applied to the foam molded body when a passenger is seated. Thus, the ventilation groove can be prevented from being crushed while ensuring good riding comfort.
In addition, since the foamed molded body includes the upper foamed molded body and the lower foamed molded body, such an operational effect is achieved. For example, the foamed molded body can be easily manufactured compared to fitting a pipe into the ventilation groove. In addition, it is possible to reliably ensure good riding comfort.

ここで、前記通気溝は、前記上部発泡成形体に形成されるとともに、前記着座面に開口し、前記着座面に、この着座面における前記通気溝の開口を閉塞した変形可能な板体が配設され、前記板体は、前記上部発泡成形体より硬度が低くてもよい。   Here, the ventilation groove is formed in the upper foamed molded body, and is open to the seating surface, and a deformable plate body that closes the opening of the ventilation groove on the seating surface is disposed on the seating surface. The plate body may have a lower hardness than the upper foamed molded body.

この場合、着座面に配設された板体の硬度が、上部発泡成形体の硬度より低いので、快適な乗り心地性を確保することができる。   In this case, since the hardness of the plate disposed on the seating surface is lower than the hardness of the upper foamed molded body, a comfortable riding comfort can be ensured.

また、前記通気溝は、前記上部発泡成形体に形成されるとともに、前記上部発泡成形体において、前記着座面の反対側の裏面に開口し、前記下部発泡成形体は、前記上部発泡成形体の前記裏面における前記通気溝の開口を閉塞してもよい。   In addition, the ventilation groove is formed in the upper foam molded body, and in the upper foam molded body, an opening is made on a back surface opposite to the seating surface, and the lower foam molded body is formed on the upper foam molded body. You may block | close the opening of the said ventilation groove in the said back surface.

この場合、下部発泡成形体が、上部発泡成形体の裏面における通気溝の開口を閉塞しているので、前記裏面における通気溝の開口部が下部発泡成形体により保持されることとなり、乗員の着座時に、前記裏面側が変形し通気溝が潰されようとしても、下部発泡成形体に引張力が発生することとなる。したがって、通気溝の内面が変形するのをその深さ方向の全域にわたって抑制することが可能になり、通気溝が潰れるのを抑制することができる。   In this case, since the lower foam molding closes the opening of the ventilation groove on the back surface of the upper foam molding, the opening of the ventilation groove on the back surface is held by the lower foam molding, and the seating of the passenger Sometimes, even if the back side is deformed and the ventilation groove is crushed, a tensile force is generated in the lower foamed molded body. Therefore, the inner surface of the ventilation groove can be prevented from being deformed over the entire region in the depth direction, and the ventilation groove can be prevented from being crushed.

また、前記上部発泡成形体は、発泡ポリウレタンを含む材質で形成され、前記下部発泡成形体は、発泡ポリプロピレンを含む材質で形成されてもよい。   The upper foam molded body may be formed of a material including foamed polyurethane, and the lower foam molded body may be formed of a material including foamed polypropylene.

この場合、上部発泡成形体が、発泡ポリウレタンを含む材質で形成され、下部発泡成形体が、発泡ポリプロピレンを含む材質で形成されているので、前述の作用効果を奏するシート用パッドを容易に形成することができる。   In this case, since the upper foam molded body is formed of a material containing foamed polyurethane and the lower foam molded body is formed of a material containing foamed polypropylene, a sheet pad that exhibits the above-described effects can be easily formed. be able to.

この発明によれば、乗員の着座時に通気溝が潰れるのを抑制することができる。   According to the present invention, it is possible to prevent the ventilation groove from being crushed when the occupant is seated.

本発明に係る一実施形態として示した座席シートの上面図である。It is a top view of a seat seat shown as one embodiment concerning the present invention. 図１に示す座席シートのＡ−Ａ線矢視断面図である。It is an AA arrow directional cross-sectional view of the seat seat shown in FIG.

以下、本発明に係るシート用パッドおよび座席シートの一実施形態を、図１および図２を参照しながら説明する。
例えば自動車等の車両に装着される座席シート１０は、シート用パッド１と、フレーム２１と、第１ワイヤ（ワイヤ）２２および第２ワイヤ（ワイヤ）２３と、を備える。 Hereinafter, an embodiment of a seat pad and a seat according to the present invention will be described with reference to FIGS. 1 and 2.
For example, the seat 10 attached to a vehicle such as an automobile includes a seat pad 1, a frame 21, a first wire (wire) 22, and a second wire (wire) 23.

シート用パッド１は、合成樹脂材料からなる発泡成形体１１を備える。シート用パッド１は、シートに着座する乗員が当接する着座面１７を備える。シート用パッド１は、クッションパッドおよびバックパッドとして用いることができる。着座面１７に当接する乗員の部位として、尻、および腿、または背中が挙げられる。   The sheet pad 1 includes a foam molded body 11 made of a synthetic resin material. The seat pad 1 includes a seating surface 17 on which an occupant seated on the seat abuts. The seat pad 1 can be used as a cushion pad and a back pad. As a part of the occupant in contact with the seating surface 17, a hip, a thigh, or a back can be cited.

シート用パッド１をクッションパッドとして用いた場合、シート用パッド１が車両に装着された状態で、着座面１７は、鉛直方向の上側を向き、シート用パッド１には、乗員の荷重が上側から作用する。また、シート用パッド１をバックパッドとして用いた場合、シート用パッド１が車両に装着された状態で、着座面１７は、車両の前側を向き、シート用パッド１には、乗員の荷重が前側から作用する。
以下、クッションパッドとして用いられるシート用パッド１を例に挙げて説明する。 When the seat pad 1 is used as a cushion pad, the seating surface 17 faces upward in the vertical direction with the seat pad 1 mounted on the vehicle, and the passenger's load is applied to the seat pad 1 from above. Works. Further, when the seat pad 1 is used as a back pad, the seating surface 17 faces the front side of the vehicle with the seat pad 1 mounted on the vehicle, and the occupant's load is on the front side of the seat pad 1. Acts from.
Hereinafter, the seat pad 1 used as a cushion pad will be described as an example.

シート用パッド１の発泡成形体１１は、本体部１２と、本体部１２に左右方向Ｘの両側から連なる左右一対のサイド部１３と、本体部１２から後方に向けて突出する取付部１４と、を備えるとともに、着座面１７を有する。
着座面１７において、一対のサイド部１３と本体部１２との境界部分には、前後方向Ｙに延びる第１境界溝１１ａが各別に形成され、本体部１２と取付部１４との境界部分には、左右方向Ｘに延びる第２境界溝１１ｂが形成されている。
本体部１２は、上面視において、一対の辺部が前後方向Ｙに延び、かつ残り一対の辺部が前後方向Ｙに直交する左右方向Ｘに延びる矩形状を呈する。図示の例では、本体部１２の平面視形状は、前後方向Ｙに長い長方形状となっている。 The foam molded body 11 of the seat pad 1 includes a main body portion 12, a pair of left and right side portions 13 that are continuous with the main body portion 12 from both sides in the left-right direction X, and an attachment portion 14 that protrudes rearward from the main body portion 12. And a seating surface 17.
In the seating surface 17, first boundary grooves 11 a extending in the front-rear direction Y are formed separately at the boundary portion between the pair of side portions 13 and the main body portion 12, and at the boundary portion between the main body portion 12 and the attachment portion 14. A second boundary groove 11b extending in the left-right direction X is formed.
The main body 12 has a rectangular shape with a pair of sides extending in the front-rear direction Y and the remaining pair of sides extending in the left-right direction X orthogonal to the front-rear direction Y in a top view. In the illustrated example, the planar view shape of the main body 12 is a rectangular shape that is long in the front-rear direction Y.

発泡成形体１１に空調用の通気溝１６が形成されている。通気溝１６は、本体部１２に形成されている。通気溝１６は、空気の供給源側と連通するとともに、着座面１７の外側に連通している。
通気溝１６は、本体部１２における左右方向Ｘの全長にわたって連続して延びる横溝１６ａと、横溝１６ａにおける左右方向Ｘの両端部から前方に向けて延びる左右一対の外溝１６ｂと、横溝１６ａにおける左右方向Ｘの中央部から前方に向けて延びる内溝１６ｃと、横溝１６ａにおける左右方向Ｘの中間部において、内溝１６ｃから左右方向Ｘにずれた部分から後方に向けて延びる後溝１６ｄと、を備える。なお、外溝１６ｂが横溝１６ａから前後方向Ｙに延びる向きと、内溝１６ｃが横溝１６ａから前後方向Ｙに延びる向きと、を逆向きにしてもよい。 A ventilation groove 16 for air conditioning is formed in the foamed molded body 11. The ventilation groove 16 is formed in the main body portion 12. The ventilation groove 16 communicates with the air supply source side and communicates with the outside of the seating surface 17.
The ventilation groove 16 includes a lateral groove 16a continuously extending over the entire length in the left-right direction X of the main body portion 12, a pair of left and right outer grooves 16b extending forward from both ends of the lateral groove X in the left-right direction X, and left and right in the lateral groove 16a. An inner groove 16c extending forward from the center in the direction X, and a rear groove 16d extending rearward from a portion shifted in the left-right direction X from the inner groove 16c in an intermediate portion in the left-right direction X of the lateral groove 16a. Prepare. The direction in which the outer groove 16b extends in the front-rear direction Y from the lateral groove 16a and the direction in which the inner groove 16c extends in the front-rear direction Y from the lateral groove 16a may be reversed.

横溝１６ａは、本体部１２において、前後方向Ｙの中央部より後方に位置する部分に配置されている。外溝１６ｂ、および内溝１６ｃは、本体部１２における前後方向Ｙの中央部を前後方向Ｙに跨いで配置されている。
横溝１６ａ、外溝１６ｂ、内溝１６ｃ、および後溝１６ｄそれぞれの溝幅は互いに同等になっている。横溝１６ａ、外溝１６ｂ、内溝１６ｃ、および後溝１６ｄそれぞれの深さも互いに同等になっている。 The lateral groove 16a is disposed in a portion of the main body 12 that is located behind the central portion in the front-rear direction Y. The outer groove 16 b and the inner groove 16 c are disposed across the center in the front-rear direction Y of the main body 12 in the front-rear direction Y.
The lateral grooves 16a, the outer grooves 16b, the inner grooves 16c, and the rear grooves 16d have the same groove width. The horizontal grooves 16a, the outer grooves 16b, the inner grooves 16c, and the rear grooves 16d have the same depth.

なお、外溝１６ｂ、内溝１６ｃおよび後溝１６ｄそれぞれの左右方向Ｘの位置、横溝１６ａの前後方向Ｙの位置、並びに、横溝１６ａ、外溝１６ｂ、内溝１６ｃ、および後溝１６ｄの各本数は、本実施形態に限らず適宜変更してもよい。例えば、横溝１６ａは、本体部１２において、前後方向Ｙの中央部より前方に位置する部分に配置してもよい。外溝１６ｂ、および内溝１６ｃとして、本体部１２における前後方向Ｙの中央部を前後方向Ｙに跨がない構成を採用してもよい。   It should be noted that the position of the outer groove 16b, the inner groove 16c and the rear groove 16d in the left-right direction X, the position of the lateral groove 16a in the front-rear direction Y, and the number of the lateral grooves 16a, outer grooves 16b, inner grooves 16c and rear grooves 16d. Is not limited to this embodiment, and may be changed as appropriate. For example, the lateral groove 16a may be disposed in a portion of the main body portion 12 that is located in front of the central portion in the front-rear direction Y. As the outer groove 16b and the inner groove 16c, a configuration in which the central portion of the main body portion 12 in the front-rear direction Y does not straddle the front-rear direction Y may be adopted.

横溝１６ａ、外溝１６ｂ、内溝１６ｃ、および後溝１６ｄそれぞれの溝幅を互いに異ならせてもよく、横溝１６ａ、外溝１６ｂ、内溝１６ｃ、および後溝１６ｄそれぞれの深さも互いに異ならせてもよい。横溝１６ａの溝幅および深さを、左右方向Ｘの全長にわたって同等にしなくてもよく、左右方向Ｘにおける少なくとも一部で異ならせてもよい。外溝１６ｂ、内溝１６ｃ、および後溝１６ｄそれぞれの溝幅および深さを、前後方向Ｙの全長にわたって同等にしなくてもよく、前後方向Ｙにおける少なくとも一部で異ならせてもよい。   The lateral grooves 16a, outer grooves 16b, inner grooves 16c, and rear grooves 16d may have different groove widths, and the lateral grooves 16a, outer grooves 16b, inner grooves 16c, and rear grooves 16d may have different depths. Also good. The groove width and depth of the lateral groove 16a may not be equal over the entire length in the left-right direction X, and may be different at least in a part in the left-right direction X. The groove width and depth of each of the outer groove 16b, the inner groove 16c, and the rear groove 16d do not have to be equal over the entire length in the front-rear direction Y, and may differ at least partially in the front-rear direction Y.

ここで、シート用パッド１は、矩形枠状のフレーム２１を介して車両に装着される。フレーム２１は、例えば金属材料等で形成される。フレーム２１は、発泡成形体１１における着座面１７と反対側の取付面１５のうち、本体部１２と取付部１４との境界部分、左右一対のサイド部１３、並びに、本体部１２の前端部が位置する各部分に跨って一体に配設される。なお、フレーム２１は、矩形枠状に限らず例えば、円形枠状にする等適宜変更してもよい。
フレーム２１には、フレーム２１の内側開口を格子状に区画し、発泡成形体１１の取付面１５を支持する第１ワイヤ２２、および第２ワイヤ２３が取付けられている。第１ワイヤ２２、および第２ワイヤ２３は、例えば金属材料等で形成される。なお、第１ワイヤ２２、および第２ワイヤ２３それぞれの数および位置は、本実施形態に限らず適宜変更してもよい。 Here, the seat pad 1 is attached to the vehicle via a rectangular frame 21. The frame 21 is formed of, for example, a metal material. Of the mounting surface 15 on the opposite side of the seating surface 17 in the foamed molded body 11, the frame 21 has a boundary portion between the main body portion 12 and the mounting portion 14, a pair of left and right side portions 13, and a front end portion of the main body portion 12. It is integrally disposed across the respective portions located. Note that the frame 21 is not limited to a rectangular frame shape, and may be changed as appropriate, for example, a circular frame shape.
The frame 21 is provided with a first wire 22 and a second wire 23 that divide the inner openings of the frame 21 in a lattice shape and support the mounting surface 15 of the foam molded body 11. The first wire 22 and the second wire 23 are made of, for example, a metal material. The numbers and positions of the first wires 22 and the second wires 23 are not limited to the present embodiment and may be changed as appropriate.

第１ワイヤ２２は、左右方向Ｘに延び、フレーム２１のうち、前後方向Ｙに延びる左右一対の縦部２１ａ同士を連結している。図示の例では、第１ワイヤ２２は、縦部２１ａにおける前後方向Ｙの中央部同士を互いに連結し、本体部１２における前後方向Ｙの中央部に、左右方向Ｘの全域にわたって位置している。
第２ワイヤ２３は、前後方向Ｙに延び、フレーム２１のうち、左右方向Ｘに延びる前後一対の横部２１ｂ同士を連結している。図示の例では、第２ワイヤ２３は、フレーム２１の内側開口を左右方向Ｘにほぼ３等分割するように２つ配設されている。第２ワイヤ２３は、本体部１２のうち、前端縁部を除く前後方向Ｙの全域にわたって位置している。２つの第２ワイヤ２３同士の間に、通気溝１６における内溝１６ｃおよび後溝１６ｄが位置している。 The first wire 22 extends in the left-right direction X and connects a pair of left and right vertical portions 21 a extending in the front-rear direction Y of the frame 21. In the illustrated example, the first wire 22 connects the central portions in the front-rear direction Y of the vertical portion 21 a to each other, and is positioned over the entire region in the left-right direction X at the central portion of the main body portion 12 in the front-rear direction Y.
The second wire 23 extends in the front-rear direction Y, and connects a pair of front and rear lateral portions 21 b extending in the left-right direction X of the frame 21. In the illustrated example, two second wires 23 are arranged so as to divide the inner opening of the frame 21 into approximately three equal parts in the left-right direction X. The 2nd wire 23 is located over the whole area of the front-back direction Y except the front-end edge part among the main-body parts 12. FIG. Between the two second wires 23, the inner groove 16c and the rear groove 16d in the ventilation groove 16 are located.

そして本実施形態では、発泡成形体１１は、着座面１７を有する上部発泡成形体２５と、着座面１７と反対の取付面１５側の下部発泡成形体２６と、により構成されている。上部発泡成形体２５および下部発泡成形体２６は互いに接着されている。上部発泡成形体２５および下部発泡成形体２６は、接着剤を介在させず直接互いに接着してもよいし、接着剤を介して互いに接着してもよい。上部発泡成形体２５および下部発泡成形体２６はそれぞれ、全体が同一の材質により一体に形成されている。下部発泡成形体２６は、上部発泡成形体２５より硬度が高い。
上部発泡成形体２５の体積は、下部発泡成形体２６の体積より大きい。上部発泡成形体２５の厚さは、下部発泡成形体２６の厚さより厚い。なお、上部発泡成形体２５の体積を、下部発泡成形体２６の体積以下としてもよい。上部発泡成形体２５の厚さを、下部発泡成形体２６の厚さ以下としてもよい。 In the present embodiment, the foam molded body 11 includes an upper foam molded body 25 having a seating surface 17 and a lower foam molded body 26 on the mounting surface 15 side opposite to the seating surface 17. The upper foam molded body 25 and the lower foam molded body 26 are bonded to each other. The upper foam molded body 25 and the lower foam molded body 26 may be directly bonded to each other without an adhesive, or may be bonded to each other via an adhesive. Each of the upper foam molded body 25 and the lower foam molded body 26 is integrally formed of the same material. The lower foam molded body 26 has higher hardness than the upper foam molded body 25.
The volume of the upper foam molded body 25 is larger than the volume of the lower foam molded body 26. The thickness of the upper foam molded body 25 is thicker than the thickness of the lower foam molded body 26. Note that the volume of the upper foam molded body 25 may be equal to or less than the volume of the lower foam molded body 26. The thickness of the upper foam molded body 25 may be equal to or less than the thickness of the lower foam molded body 26.

上部発泡成形体２５は、ポリオール、例えばジフェニルメタンジイソシアネート（ＭＤＩ）等のポリイソシアネート、架橋剤、発泡剤、および触媒を含有する発泡原液を発泡成形することで得られる発泡ポリウレタン等の発泡高分子材料を含む材質で形成される。上部発泡成形体２５は、単一の発泡高分子材料、および互いに異なる複数種の発泡高分子材料を混ぜ合わせた混合材料のいずれであってもよく、公知の技術で採用される添加剤等を配合してもよい。
下部発泡成形体２６は、上部発泡成形体２５の材質よりも硬度が高い、例えば発泡ポリプロピレン（ＥＰＰ）等の発泡高分子材料を含む材質で形成される。高分子材料の材質にも依存するが、発泡倍率は例えば１０〜６０倍程度が好ましい。下部発泡成形体２６は、単一の発泡高分子材料、および互いに異なる複数種の発泡高分子材料を混ぜ合わせた混合材料のいずれであってもよく、公知の技術で採用される添加剤等を配合してもよい。 The upper foam molded body 25 is made of a foamed polymer material such as foamed polyurethane obtained by foaming a foaming stock solution containing a polyol, for example, a polyisocyanate such as diphenylmethane diisocyanate (MDI), a crosslinking agent, a foaming agent, and a catalyst. It is made of a material that contains it. The upper foamed molded body 25 may be either a single foamed polymer material or a mixed material obtained by mixing a plurality of types of foamed polymer materials different from each other. You may mix | blend.
The lower foamed molded body 26 is formed of a material having a higher hardness than the material of the upper foamed molded body 25, for example, a foamed polymer material such as foamed polypropylene (EPP). Although depending on the material of the polymer material, the expansion ratio is preferably about 10 to 60 times, for example. The lower foamed molded body 26 may be either a single foamed polymer material or a mixed material obtained by mixing a plurality of types of foamed polymer materials different from each other. You may mix | blend.

ここで、硬度の測定方法の一例について説明する。
まず、加圧板を、加圧板の受ける反力が４．９Ｎになるまで、試験片に向けて５０ｍｍ／ｍｉｎの速さで前進移動し、この位置を、試験片の厚さが１００％である、加圧板の初期位置とする。
次に、初期位置に位置する加圧板を、試験片に向けて５０ｍｍ／ｍｉｎの速さで前進移動し、試験片の厚さが７５％になったときに、加圧板を速やかに試験片から反力を受けなくなる位置まで後退移動する。そして、６０秒間待機した後に、再度、加圧板を試験片に向けて５０ｍｍ／ｍｉｎの速さで前進移動し、試験片の厚さが７５％になったときに加圧板を停止する。そして、２０秒間待機したときに加圧板が受けている反力を特定し、この値を硬度とする。 Here, an example of a method for measuring hardness will be described.
First, the pressure plate is moved forward at a speed of 50 mm / min toward the test piece until the reaction force received by the pressure plate reaches 4.9 N, and the thickness of the test piece is 100% at this position. The initial position of the pressure plate.
Next, the pressure plate located at the initial position is moved forward at a speed of 50 mm / min toward the test piece, and when the thickness of the test piece reaches 75%, the pressure plate is quickly removed from the test piece. Move backward to a position where it will no longer receive reaction force. Then, after waiting for 60 seconds, the pressure plate is moved forward again at a speed of 50 mm / min toward the test piece, and the pressure plate is stopped when the thickness of the test piece reaches 75%. Then, the reaction force received by the pressure plate when waiting for 20 seconds is specified, and this value is taken as the hardness.

通気溝１６は、上部発泡成形体２５に形成されている。
通気溝１６は、上部発泡成形体２５において、着座面１７の反対側の裏面１８に開口している。下部発泡成形体２６は、上部発泡成形体２５の裏面１８における通気溝１６の開口を閉塞している。下部発泡成形体２６は、上部発泡成形体２５の裏面１８における通気溝１６の開口の全体を一体に閉塞している。 The ventilation groove 16 is formed in the upper foamed molded body 25.
The ventilation groove 16 opens in the back surface 18 on the opposite side of the seating surface 17 in the upper foamed molded body 25. The lower foam molded body 26 closes the opening of the ventilation groove 16 on the back surface 18 of the upper foam molded body 25. The lower foam molded body 26 integrally closes the entire opening of the ventilation groove 16 on the back surface 18 of the upper foam molded body 25.

下部発泡成形体２６は、発泡成形体１１のうち、本体部１２における取付面１５側の一部を構成している。下部発泡成形体２６は、本体部１２の取付面１５側のうち、前部を除く全域を構成している。下部発泡成形体２６は、平面視で左右方向Ｘに長い長方形状を呈する。なお、下部発泡成形体２６は、本体部１２の取付面１５側における全域を構成してもよい。
発泡成形体１１の着座面１７は、全域にわたって上部発泡成形体２５により構成され、取付面１５は、上部発泡成形体２５および下部発泡成形体２６により構成されている。取付面１５のうち、本体部１２の一部が下部発泡成形体２６により構成され、その他の部分は上部発泡成形体２５により構成されている。下部発泡成形体２６は、本体部１２の取付面１５のうち、前部より後方に位置する部分を構成している。 The lower foam molded body 26 constitutes a part of the foam molded body 11 on the mounting surface 15 side in the main body 12. The lower foamed molded body 26 constitutes the entire region excluding the front portion on the mounting surface 15 side of the main body portion 12. The lower foam molded body 26 has a long rectangular shape in the left-right direction X in plan view. The lower foamed molded body 26 may constitute the entire region on the mounting surface 15 side of the main body 12.
The seating surface 17 of the foam molded body 11 is configured by the upper foam molded body 25 over the entire area, and the mounting surface 15 is configured by the upper foam molded body 25 and the lower foam molded body 26. Of the mounting surface 15, a part of the main body 12 is constituted by the lower foam molded body 26, and the other part is constituted by the upper foam molded body 25. The lower foamed molded body 26 constitutes a portion of the attachment surface 15 of the main body portion 12 that is located behind the front portion.

通気溝１６は着座面１７に開口している。着座面１７に、この着座面１７における通気溝１６の開口を閉塞した変形可能な板体２７が配設されている。板体２７は、着座面１７における通気溝１６の開口の全体を一体に閉塞している。通気溝１６は、板体２７に形成された貫通孔２７ａを通して、着座面１７の外側に連通している。板体２７は、着座面１７のうち、本体部１２が位置する部分における全域にわたって一体に配設されている。板体２７は、例えば軟質発砲ポリウレタン等で形成され、上部発泡成形体２５より硬度が低い。
下部発泡成形体２６の体積は、板体２７の体積より大きい。下部発泡成形体２６の厚さは、板体２７の厚さより厚い。なお、下部発泡成形体２６の体積を、板体２７の体積以下としてもよい。下部発泡成形体２６の厚さを、板体２７の厚さ以下としてもよい。 The ventilation groove 16 is open to the seating surface 17. A deformable plate body 27 is disposed on the seating surface 17 so as to close the opening of the ventilation groove 16 in the seating surface 17. The plate body 27 integrally closes the entire opening of the ventilation groove 16 in the seating surface 17. The ventilation groove 16 communicates with the outside of the seating surface 17 through a through hole 27 a formed in the plate body 27. The plate body 27 is integrally disposed over the entire area of the seating surface 17 where the main body 12 is located. The plate body 27 is made of, for example, soft foamed polyurethane or the like, and has a lower hardness than the upper foam molded body 25.
The volume of the lower foam molded body 26 is larger than the volume of the plate body 27. The lower foamed molded body 26 is thicker than the plate 27. Note that the volume of the lower foamed molded body 26 may be equal to or less than the volume of the plate body 27. The thickness of the lower foam molded body 26 may be equal to or less than the thickness of the plate body 27.

以上説明したように、本実施形態によるシート用パッド１および座席シート１０によれば、下部発泡成形体２６が、着座面１７を有する上部発泡成形体２５より硬度が高いので、乗員の着座時に発泡成形体１１に加えられる力を、下部発泡成形体２６に受け止めさせることが可能になり、良好な乗り心地性を確保しつつ、通気溝１６が潰れるのを抑制することができる。
しかも、発泡成形体１１が、上部発泡成形体２５および下部発泡成形体２６を備えることで、このような作用効果が奏されることから、例えば、通気溝１６にパイプを嵌め込むのと比べて、容易に製造することができるとともに、良好な乗り心地性を確実に確保することができる。
また、着座面１７に配設された板体２７の硬度が、上部発泡成形体２５の硬度より低いので、快適な乗り心地性を確保することができる。 As described above, according to the seat pad 1 and the seat 10 according to the present embodiment, the lower foamed molded body 26 has higher hardness than the upper foamed molded body 25 having the seating surface 17, so that foaming occurs when the occupant is seated. The force applied to the molded body 11 can be received by the lower foamed molded body 26, and the ventilation groove 16 can be prevented from being crushed while ensuring good riding comfort.
In addition, since the foamed molded body 11 includes the upper foamed molded body 25 and the lower foamed molded body 26, such an operational effect is achieved. For example, as compared with fitting a pipe into the ventilation groove 16. In addition to being easy to manufacture, good ride comfort can be reliably ensured.
Further, since the hardness of the plate body 27 disposed on the seating surface 17 is lower than the hardness of the upper foamed molded body 25, comfortable riding comfort can be ensured.

また、下部発泡成形体２６が、上部発泡成形体２５の裏面１８における通気溝１６の開口を閉塞しているので、前記裏面１８における通気溝１６の開口部が下部発泡成形体２６により保持されることとなり、乗員の着座時に、前記裏面１８側が変形し通気溝１６が潰されようとしても、下部発泡成形体２６に引張力が発生することとなる。したがって、通気溝１６の内面が変形するのをその深さ方向の全域にわたって抑制することが可能になり、通気溝１６が潰れるのを抑制することができる。   Further, since the lower foam molded body 26 closes the opening of the ventilation groove 16 on the back surface 18 of the upper foam molded body 25, the opening of the ventilation groove 16 on the back surface 18 is held by the lower foam molded body 26. In other words, when the occupant is seated, even if the back surface 18 side is deformed and the ventilation groove 16 is crushed, a tensile force is generated in the lower foamed molded body 26. Therefore, it is possible to suppress the deformation of the inner surface of the ventilation groove 16 over the entire region in the depth direction, and it is possible to suppress the ventilation groove 16 from being crushed.

なお、本発明の技術範囲は、前述した各実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。   The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

例えば、前記実施形態では、サイド部１３および取付部１４を備えるシート用パッド１を示したが、本発明は、これら１３、１４を有しないシート用パッドであっても適用可能である。
また、前記実施形態では、通気溝１６として、上部発泡成形体２５における着座面１７および裏面１８の双方に開口した構成を示したが、これに限らず例えば、着座面１７および裏面１８のうちのいずれか一方に開口してもよいし、双方に開口していない構成を採用してもよい。
また、前記実施形態では、通気溝１６を上部発泡成形体２５に形成したが、下部発泡成形体２６に形成してもよいし、上部発泡成形体２５および下部発泡成形体２６の双方に形成してもよい。下部発泡成形体２６に通気溝１６を形成する場合、空調効果の観点から、通気溝１６は取付面１５に開口していないのが好ましい。上部発泡成形体２５および下部発泡成形体２６の双方に通気溝１６を形成する場合、上部発泡成形体２５の通気溝１６と、下部発泡成形体２６の通気溝１６と、を鉛直方向に互いに連結してもよいし、鉛直方向に交差する横方向に離間させてもよい。 For example, in the above-described embodiment, the seat pad 1 including the side portion 13 and the attachment portion 14 is shown. However, the present invention is applicable even to a seat pad that does not include these 13 and 14.
Moreover, in the said embodiment, although the structure opened to both the seating surface 17 and the back surface 18 in the upper foaming molding 25 was shown as the ventilation groove 16, it is not restricted to this, For example, of the seating surface 17 and the back surface 18 You may open to either one, and the structure which is not opening to both may be employ | adopted.
In the above embodiment, the ventilation groove 16 is formed in the upper foam molded body 25. However, the ventilation groove 16 may be formed in the lower foam molded body 26, or may be formed in both the upper foam molded body 25 and the lower foam molded body 26. May be. When the ventilation groove 16 is formed in the lower foamed molded body 26, it is preferable that the ventilation groove 16 is not opened in the mounting surface 15 from the viewpoint of the air conditioning effect. When the ventilation groove 16 is formed in both the upper foam molding 25 and the lower foam molding 26, the ventilation groove 16 of the upper foam molding 25 and the ventilation groove 16 of the lower foam molding 26 are connected to each other in the vertical direction. Alternatively, they may be separated in the lateral direction intersecting the vertical direction.

その他、本発明の趣旨を逸脱しない範囲で、上記した実施の形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、上記した変形例を適宜組み合わせてもよい。   In addition, it is possible to appropriately replace the constituent elements in the above-described embodiments with well-known constituent elements without departing from the spirit of the present invention, and the above-described modified examples may be appropriately combined.

１ シート用パッド
１０ 座席シート
１１ 発泡成形体
１５ 取付面
１６ 通気溝
１７ 着座面
１８ 裏面
２１ フレーム
２２ 第１ワイヤ（ワイヤ）
２３ 第２ワイヤ（ワイヤ）
２５ 上部発泡成形体
２６ 下部発泡成形体
２７ 板体 DESCRIPTION OF SYMBOLS 1 Seat pad 10 Seat sheet 11 Foam molding 15 Mounting surface 16 Ventilation groove 17 Seating surface 18 Back surface 21 Frame 22 1st wire (wire)
23 Second wire (wire)
25 Upper Foam Molded Body 26 Lower Foam Molded Body 27 Plate

Claims (5)

乗員が着座する着座面を有するとともに、合成樹脂材料からなる発泡成形体を備え、この発泡成形体に空調用の通気溝が形成されたシート用パッドであって、
前記発泡成形体は、前記着座面を有する上部発泡成形体と、前記着座面と反対の取付面側の下部発泡成形体と、からなり、
前記下部発泡成形体は、前記上部発泡成形体より硬度が高いことを特徴とするシート用パッド。 A seat pad having a seating surface on which an occupant is seated, a foam molded body made of a synthetic resin material, and having a ventilation groove formed on the foam molded body,
The foam molded body comprises an upper foam molded body having the seating surface, and a lower foam molded body on the mounting surface side opposite to the seating surface,
The lower foam molded body has a higher hardness than the upper foam molded body. 前記通気溝は、前記上部発泡成形体に形成されるとともに、前記着座面に開口し、
前記着座面に、この着座面における前記通気溝の開口を閉塞した変形可能な板体が配設され、
前記板体は、前記上部発泡成形体より硬度が低いことを特徴とする請求項１に記載のシート用パッド。 The ventilation groove is formed in the upper foamed molded body and opens to the seating surface,
On the seating surface, a deformable plate that closes the opening of the ventilation groove in the seating surface is disposed,
The sheet pad according to claim 1, wherein the plate body has a lower hardness than the upper foamed molded body. 前記通気溝は、前記上部発泡成形体に形成されるとともに、前記上部発泡成形体において、前記着座面の反対側の裏面に開口し、
前記下部発泡成形体は、前記上部発泡成形体の前記裏面における前記通気溝の開口を閉塞していることを特徴とする請求項１または２に記載のシート用パッド。 The ventilation groove is formed in the upper foam molded body, and in the upper foam molded body, opens to the back surface on the opposite side of the seating surface,
The sheet pad according to claim 1, wherein the lower foam molded body closes an opening of the ventilation groove on the back surface of the upper foam molded body. 前記上部発泡成形体は、発泡ポリウレタンを含む材質で形成され、前記下部発泡成形体は、発泡ポリプロピレンを含む材質で形成されていることを特徴とする請求項１から３のいずれか１項に記載のシート用パッド。   The said upper foaming molding is formed with the material containing a polyurethane foam, The said lower foaming molding is formed with the material containing a foaming polypropylene, The any one of Claim 1 to 3 characterized by the above-mentioned. Seat pad. 請求項１から４のいずれか１項に記載のシート用パッドと、
前記発泡成形体の取付面に配設された枠状のフレームと、
前記フレームの内側開口を区画し、前記発泡成形体の取付面を支持するワイヤと、を備えることを特徴とする座席シート。 The seat pad according to any one of claims 1 to 4,
A frame-like frame disposed on the mounting surface of the foam molded article;
A seat that includes an inner opening of the frame and a wire that supports a mounting surface of the foamed molded body.
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