JP3289005B2 - Seating load sensor and manufacturing method thereof - Google Patents
Seating load sensor and manufacturing method thereofInfo
- Publication number
- JP3289005B2 JP3289005B2 JP2000177760A JP2000177760A JP3289005B2 JP 3289005 B2 JP3289005 B2 JP 3289005B2 JP 2000177760 A JP2000177760 A JP 2000177760A JP 2000177760 A JP2000177760 A JP 2000177760A JP 3289005 B2 JP3289005 B2 JP 3289005B2
- Authority
- JP
- Japan
- Prior art keywords
- load sensor
- strain gauge
- seat
- load
- cantilever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/40—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight
- G01G19/413—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means
- G01G19/414—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only
- G01G19/4142—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups with provisions for indicating, recording, or computing price or other quantities dependent on the weight using electromechanical or electronic computing means using electronic computing means only for controlling activation of safety devices, e.g. airbag systems
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Seats For Vehicles (AREA)
- Measurement Of Force In General (AREA)
- Air Bags (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、自動車運転席座席
或いは助手席座席である搭乗者座席に設けられるエアー
バッグの作動を行う荷重センサ及びその作製方法に関す
るものである。BACKGROUND OF THE INVENTION The present invention is, the air over that provided in the passenger seat is an automobile driver's seat seat or the front passenger's seat seat
The present invention relates to a load sensor for operating a bag and a method for manufacturing the load sensor.
【0002】[0002]
【従来の技術】従来、自動車の衝突時の自動車の搭乗者
の障害防止のためにエアーバッグを搭載した自動車が登
場している(例えば、実開平4−31056号公報参
照)。Conventionally, vehicles with Eaba' grayed to prevent failure of the occupant of the motor vehicle at the time of an automobile crash have appeared (see, for example, JP-real-Open No. 4-31056).
【0003】しかしながら、かかる自動車のエアーバッ
グによる衝突時の障害防止機能はエアーバッグを膨らま
せる圧力が常に一定であり搭乗者の体力の相違には無関
係に作動する。例えば、チャイルドシートに搭乗してい
る乳幼児に対しても、成人に対してもエアーバッグの圧
力は同じ大きさで作動し、乳幼児に成人と同じ強力な空
気圧が作動し、幼児を窒息させる危険がある。その場
合、エアーバッグの動作開始は車両のあるレベル以上の
加速度変化からなされるので、加速度の変化の発生が車
両の衝突時のみでなく車輪が側溝に落ちる、急旋回す
る、急ブレーキ等でエアーバッグが作動すれば、乳幼児
は窒息死の危険にさらされることになる。[0003] However, airbags for such automobiles have been developed.
Failure protection during collisions grayed operates regardless of the difference in physical strength always the pressure to inflate the Eaba' grayed a constant occupant. For example, even for infants aboard the child seat, the pressure of Eaba' grayed against adults operate in the same size, same powerful pressure and adults actuated infants, there is a risk of choking infant . In that case, since the operation start of Eaba' grayed are made from the level above change in acceleration of the vehicle, the occurrence of change in acceleration falls wheel gutter not only upon collision of the vehicle, suddenly turning, Eaba' in sudden braking, etc. The infants are at risk of suffocation if activated.
【0004】そのようなエアーバッグを搭載した自動車
の荷重センサは、以下のような構造となっている。[0004] automobile load sensors equipped with such Eaba' grayed has a structure as follows.
【0005】図12はかかる従来の荷重センサの構造を
示す図であり、図12(a)は荷重センサの取り付け部
の上面図、図12(b)はその側面図である。FIG. 12 is a view showing the structure of such a conventional load sensor. FIG. 12 (a) is a top view of a mounting portion of the load sensor, and FIG. 12 (b) is a side view thereof.
【0006】これらの図において、100は床部、10
0Aは床部に形成され、楕円形板101の撓みを許容す
るための凹部、102は楕円形板101の両側の床側固
定端109に形成される床部100への固定用穴、10
3は座席脚側固定端108に形成される座席脚へ連結す
るための固定用穴、104は座席脚側固定端108のみ
が撓むことを可能にする分離用長穴、105は座席脚側
固定端108の両側の楕円形板101との結合付近に配
置される半導体ひずみゲージ(または抵抗箔ひずみゲー
ジ)である。In these figures, 100 is a floor, 10
0A is a recess formed in the floor to allow the elliptical plate 101 to bend, and 102 is a fixing hole to the floor 100 formed at the floor-side fixed ends 109 on both sides of the elliptical plate 101.
3 is a fixing hole for connecting to a seat leg formed at the seat leg side fixed end 108; 104 is a separation slot which allows only the seat leg side fixed end 108 to bend; 105 is a seat leg side (not a or resistance Hakuhi seen gate <br/> di) semiconductor strain gauge is positioned near the binding of both sides of the elliptical plate 101 of the fixed end 108 is.
【0007】これらの図に示すように、楕円形板101
の両端に床側固定端109、中央に座席脚側固定端10
8をそれぞれ配置し、半導体ひずみゲージ105が楕円
形板101表面を鏡面仕上げ加工して拡散法で設けられ
ている。あるいは抵抗箔ひずみゲージ単体が接着され
る。人体荷重107が座席脚側固定端108に負荷され
ると座席脚側固定端108には曲げ応力を生じ、半導体
ひずみゲージ105(あるいは抵抗箔ひずみゲージ)で
曲げひずみを検出し、人体荷重107に比例した電気的
出力が得られる。楕円形板101は二本のボルト110
によって床部100に固定されている。As shown in these figures, an elliptical plate 101
Fixed ends 109 on both sides of the floor, and fixed ends 10 on the seat leg side in the center.
8 are arranged, and a semiconductor strain gauge 105 is provided by a diffusion method by mirror finishing the surface of the elliptical plate 101. Alternatively, the resistance foil strain gauge alone is bonded. When a human body load 107 is applied to the seat leg side fixed end 108, a bending stress is generated at the seat leg side fixed end 108, and a bending strain is detected by a semiconductor strain gauge 105 (or a resistance foil strain gauge). A proportional electrical output is obtained. The elliptical plate 101 has two bolts 110
To the floor 100.
【0008】従来の抵抗箔ひずみゲージを使用して荷重
センサを作製する方法を図13に示す。図13(a)は
そのひずみゲージ単体の平面図、図13(b)はそのひ
ずみゲージ単体の側面図、図13(c)は荷重センサへ
の取付け状態を示す図である。FIG. 13 shows a method of manufacturing a load sensor using a conventional resistance foil strain gauge. FIG. 13A is a plan view of the strain gage alone, FIG. 13B is a side view of the strain gage alone, and FIG. 13C is a diagram showing a state of attachment to the load sensor.
【0009】まず、前もって、専用場所で作業員が絶
縁フィルム111に接着剤112を塗布し、その上に洗
浄処理された抵抗箔113を重ねる。First, a worker applies an adhesive 112 to an insulating film 111 at a dedicated place in advance, and superimposes a washed resistance foil 113 thereon.
【0010】上下から加熱・加圧して接着剤112の
熱硬化によって絶縁フィルム111、抵抗箔113から
なる均一な厚さの多重フィルムを作り、抵抗箔113の
表面に露光レジストを塗布し、ひずみゲージ形状を形成
したマスクを用いてレジストを露光し、現像、加熱して
ひずみゲージのレジスト膜を抵抗箔上に形成させる。Heat and pressure are applied from above and below to form a multi-layer film of uniform thickness consisting of an insulating film 111 and a resistive foil 113 by thermosetting of the adhesive 112, an exposure resist is applied to the surface of the resistive foil 113, and a strain gauge The resist is exposed using a mask having a shape, developed, and heated to form a resist film of a strain gauge on the resistance foil.
【0011】その後、酸化液を噴霧して不必要な部分
を除去する。Thereafter, unnecessary portions are removed by spraying an oxidizing liquid.
【0012】次に、絶縁フィルム111を規定の寸法
で裁断して、図13(a)に示すひずみゲージが製作さ
れる。Next, the insulating film 111 is cut into a prescribed size to produce a strain gauge shown in FIG.
【0013】時間をおいて、上記で製作されたひず
みゲージを使用し、荷重センサを生産する別の場所で別
の作業員が、ひずみゲージ取付け部材114の表面11
5に接着剤を塗布して、加熱・加圧し、取付部材114
に取り付ける。At some later time, another worker using the strain gauge made above and at another location producing a load sensor may have a different surface 11 of the strain gauge mounting member 114.
5 is coated with an adhesive, heated and pressed, and the mounting member 114 is
Attach to
【0014】従って、接着剤の塗布が時間間隔を置い
て、全く別な場所と、別な作業員によって二度にわたっ
て行われる。Thus, the application of the adhesive is carried out twice at a time interval, by a completely different place and by a different operator.
【0015】[0015]
(1)床板側固定端109が左右2箇所あり、ボルト1
10の数が2本必要である。(1) There are two fixed ends 109 on the floor side and two bolts
Two numbers of 10 are required.
【0016】(2)楕円形板101の横幅が長いので部
品数と装着工数が増加する。(2) Since the width of the elliptical plate 101 is long, the number of components and the number of mounting steps increase.
【0017】(3)取付け空間が大きくなる。といった
問題があった。 〔B〕 (1)上記荷重センサは、曲げひずみを検出するので、
座席に傾斜荷重や曲げモーメント荷重が負荷されると、
重力方向の曲げひずみにこれら傾斜荷重や曲げモーメン
ト荷重による曲げひずみも重畳され、必要な重力方向人
体荷重107の電気的出力を指示しない。この原因は、
ひずみ検出の方法がいずれも曲げひずみであるからであ
る。(3) The mounting space becomes large. There was such a problem. [B] (1) Since the load sensor detects bending strain,
When a tilt load or bending moment load is applied to the seat,
The bending strain due to the inclination load and the bending moment load is also superimposed on the bending strain in the gravitational direction, and does not instruct the necessary electrical output of the gravitational direction human body load 107. This is because
This is because any of the strain detection methods is bending strain.
【0018】(2)固定用穴102のボルトとナット間
が長い使用期間中に緩むと床板側固定端の距離が変化し
曲げひずみが検出される根拠となる固定間距離が変化
し、荷重に比例した出力が変化して正確な人体荷重値が
得られない。(2) If the distance between the bolt and the nut of the fixing hole 102 is loosened during a long period of use, the distance of the fixed end on the floor plate side changes, and the fixing distance, which is the basis for detecting bending strain, changes, and the load is reduced. The proportional output changes and an accurate human body load value cannot be obtained.
【0019】また、従来の荷重センサの作製方法におい
ては、ひずみゲージの製作と、ひずみゲージを取付け部
材に取付ける作業が時間間隔をおいて、全く別な場所
と、別な作業員によって二度にわたって加熱・加圧が行
われる。In the conventional method of manufacturing a load sensor, the production of the strain gauge and the operation of attaching the strain gauge to the mounting member are carried out twice at a completely different place and by another operator at a time interval. Heating and pressurization are performed.
【0020】本発明は、上記状況に鑑みて、搭乗者の座
席における荷重を的確に検出するとともに、安価に作製
することができる着座荷重センサ及びその荷重センサの
作製方法を提供することを目的とする。The present invention has been made in view of the above circumstances, and has as its object to provide a seating load sensor that can accurately detect a load on a passenger's seat and can be manufactured at low cost, and a method of manufacturing the load sensor. I do.
【0021】[0021]
【課題を解決するための手段】〔1〕自動車の搭乗者座
席下部の座席脚と自動車床板間に荷重検出素子を取り付
けて自動車の衝突時の搭乗者席毎の搭乗荷重を測定する
着座荷重センサにおいて、前記荷重検出素子は電気抵抗
箔を使用したひずみゲージを片持梁のひずみゲージ取り
付け部材の側面に取付け、前記片持梁を長方向に対し角
度をつけて固定端と連結したZ形形状となし、人体の着
座時の荷重を剪断ひずみから検出することを特徴とす
る。Attach the load detection element for measuring the boarding load of passengers per seat during a collision of the vehicle to the means for solving the problems] (1) automobile occupant seat bottom of the seat legs and between car floor
In the sitting load sensor, the load detecting element is an electric resistance.
Strain gauge using a foil cantilever beam
Attach to the side of the mounting member and angle the cantilever to the longitudinal direction
It has a Z-shape connected to the fixed end with a certain degree of
The load at the time of sitting is detected from the shear strain .
【0022】〔2〕上記〔1〕記載の着座荷重センサに
おいて、前記座席脚の4脚に荷重検出素子を取り付ける
ことを特徴とする。[2] The seating load sensor according to the above [1], wherein a load detecting element is attached to four of the seat legs.
【0023】〔3〕上記〔1〕記載の着座荷重センサに
おいて、前記ひずみゲージ取付け部は上下にプレス加工
された補強板によりZ形片持梁荷重センサをサンドウィ
ッチ状に挟んで左右両端を点溶接した一体化してなるこ
とを特徴とする。[ 3 ] In the seating load sensor according to the above [ 1 ], the strain gauge mounting portion is spot-welded on both left and right ends with a Z-shaped cantilever load sensor sandwiched between reinforcing plates pressed in the vertical direction. It is characterized by being integrated.
【0024】〔4〕着座荷重センサの作製方法におい
て、自動車の搭乗者座席下部の座席脚と自動車床板間に
取り付けられる片持梁荷重センサの斜め形状のひずみゲ
ージ取付け部材を四角形断面の角材から機械加工して作
製し、ひずみゲージの作製と荷重センサのひずみゲージ
取付け部材へのひずみゲージの取付けを同時に行い、絶
縁フィルムの両面に塗布され溶剤を発散させたBステー
ジ状態の接着剤を使用し、抵抗箔を重ねて一回の加熱、
加圧で荷重センサの表面にひずみゲージを取付けること
を特徴とする。[ 4 ] In the method of manufacturing a seat load sensor, the method comprises the steps of:
The oblique strain gauge mounting member of the cantilever load sensor to be attached is machined from a square bar with a square cross section to make it, and the production of the strain gauge and the mounting of the strain gauge to the strain sensor mounting member of the load sensor are performed simultaneously. Using a B-stage adhesive applied to both sides of the insulating film and dispersing the solvent, stacking the resistance foil and heating once,
A strain gauge is attached to the surface of the load sensor by pressurization.
【0025】[0025]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照しながら詳細に説明する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【0026】図1は本発明の実施例を示す荷重センサを
有する搭乗者座席の側面図、図2はその搭乗者座席の裏
面図である。FIG. 1 is a side view of a passenger seat having a load sensor according to an embodiment of the present invention, and FIG. 2 is a rear view of the passenger seat.
【0027】これらの図に示すように、搭乗者座席1の
直下に座席脚2が4箇所付設され、各座席脚2と自動車
床板4との間に荷重センサ3が装着される。つまり、荷
重センサ3は各座席脚2毎に取り付けられ、合計4個が
配置される。しかし、座席脚4箇所と自動車床板4の間
に搭乗者が着座している時の人体荷重を測定する荷重セ
ンサ3を装着するには隙間が僅かで、且つ空間も小さ
い。As shown in these figures, four seat legs 2 are provided immediately below the passenger seat 1, and a load sensor 3 is mounted between each seat leg 2 and the floor plate 4 of the automobile. That is, the load sensor 3 is attached to each seat leg 2, and a total of four load sensors are arranged. However, when the load sensor 3 for measuring the human body load when the occupant is sitting between the four seat legs and the vehicle floor plate 4 is mounted, the gap is small and the space is small.
【0028】そのような状況下で荷重センサ3を取付け
るには、荷重センサの背高を低くして狭い空間でも容易
に装着できる形状にし、最小の部品数にして、取付け工
数を少なくする必要がある。In order to mount the load sensor 3 in such a situation, it is necessary to reduce the height of the load sensor so that it can be easily mounted even in a small space, to minimize the number of parts, and to reduce the number of mounting steps. is there.
【0029】座席から負荷される荷重は、走行中の車両
の急旋回、急ブレーキや衝突事故が発生した時は鉛直荷
重でなく、傾斜荷重、座席の前後、左右に曲げモーメン
トを受け、そのすべての状況下で重力方向の荷重を測定
する必要がある。The load applied from the seat is not a vertical load in the event of a sudden turning, sudden braking or collision of the running vehicle, but a tilting load, a bending moment in front, back, left and right of the seat. It is necessary to measure the load in the gravitational direction under the conditions described above.
【0030】また、座席側、床板側の固定部に長期間の
使用で各固定部に若干のゆるみが発生しても測定値が変
化しないことが必要である。Further, it is necessary that the measured values do not change even if the fixed portions on the seat side and floor plate side are slightly loosened due to long-term use.
【0031】以下、本発明の荷重センサの具体的構造に
ついて説明する。Hereinafter, the specific structure of the load sensor of the present invention will be described.
【0032】図3は本発明の第1実施例を示す片持梁形
状の荷重センサの側面図、図4はその荷重センサを取り
付けた状況を示す平面図である。FIG. 3 is a side view of a cantilever-shaped load sensor according to a first embodiment of the present invention, and FIG. 4 is a plan view showing a state where the load sensor is mounted.
【0033】これらの図に示すように、片持梁形状の荷
重センサ3は、座席脚側固定端8と、床板側固定端9
と、これらを連結するひずみゲージ取付け部材10を有
し、人体荷重7は座席脚側固定端8に負荷されるように
し、床板側固定端9を自動車床板4に固定する構造とな
っている。As shown in these figures, the cantilever-shaped load sensor 3 has a seat leg side fixed end 8 and a floor plate side fixed end 9.
And a strain gauge mounting member 10 for connecting these components, so that the human body load 7 is applied to the seat leg side fixed end 8, and the floor plate side fixed end 9 is fixed to the vehicle floor plate 4.
【0034】ここで、ひずみゲージの取付け面積を広く
するとともに、両側の座席脚側固定端8と床板側固定端
9からの距離を長くするためにひずみゲージ取付け部材
10は長手方向に対し角度をつけて座席脚側固定端8と
床板側固定端9に連結しておく。つまり、この形状は上
面からみると、Z形を形成する。Here, the strain gauge mounting member 10 has an angle with respect to the longitudinal direction in order to increase the mounting area of the strain gauge and increase the distance between the fixed ends 8 on the seat leg side and the fixed end 9 on the floor plate side on both sides. It is connected to the seat leg side fixed end 8 and the floor plate side fixed end 9 in advance. That is, this shape forms a Z shape when viewed from above.
【0035】そこで、片持梁のひずみゲージ取付け部材
10の両側面の厚さの中央部にひずみゲージ5を取付
け、剪断ひずみを検出する。Then, the strain gauge 5 is attached to the center of the thickness of both sides of the cantilever strain gauge attachment member 10, and the shear strain is detected.
【0036】人体荷重7が座席脚側固定端8に負荷され
ると、ひずみゲージ取付け部材10は剪断力を受け、そ
の側面には人体荷重7に比例した剪断ひずみが生じる。
このひずみは両固定端8,9の距離が変化しても、座席
に傾斜荷重、曲げモーメント荷重がかかっても重力方向
の荷重のみが剪断力となりその剪断ひずみのみが検出さ
れる。曲げひずみは片持梁のひずみゲージ取付け部材1
0の上下表面で最大で厚さの中心で零となる。ひずみゲ
ージは剪断ひずみ検出用ひずみゲージを使用するので側
面では僅かな曲げひずみが消去され、座席の前後、左右
に曲げモーメントを受けても測定値に影響を与えない。When the human body load 7 is applied to the seat leg side fixed end 8, the strain gauge mounting member 10 receives a shearing force, and a shear strain proportional to the human body load 7 is generated on the side surface.
Regarding this strain, even if the distance between the fixed ends 8 and 9 changes, even if the seat is subjected to a tilting load or a bending moment load, only the load in the direction of gravity becomes a shearing force, and only the shearing strain is detected. Bending strain is a cantilever strain gauge mounting member 1
It becomes zero at the center of the thickness at the maximum on the upper and lower surfaces of 0. Since the strain gauge uses a strain gauge for detecting shear strain, slight bending strain is eliminated on the side surface, and even if a bending moment is applied to the front, rear, left and right of the seat, the measured value is not affected.
【0037】次に、本発明のひずみゲージを使用して荷
重センサの作製方法について説明する。Next, a method of manufacturing a load sensor using the strain gauge of the present invention will be described.
【0038】図5はひずみゲージ取り付け部材の上面
図、図6はそのひずみゲージ取り付け部材のひずみゲー
ジ取付け面を上下にして多数平面に整列させた状態を示
す平面図、図7はBステージ状態の接着剤が塗布された
絶縁フィルムの平面図、図8はひずみゲージ取り付け部
材への抵抗箔の取り付け構造を示す図、図9はそのひず
みゲージの構造を示す図であり、図9(a)はその側面
図、図9(b)はその上面図、図10は座席脚側固定
端、ひずみゲージ取付け部材および床板側固定端が分離
された状態を示す図、図11は座席脚側固定端、ひずみ
ゲージ取付け部材および床板側固定端が溶接されて一体
化された状態を示す図である。FIG. 5 is a top view of the strain gauge mounting member, FIG. 6 is a plan view showing a state in which the strain gauge mounting surface of the strain gauge mounting member is arranged up and down on many planes, and FIG. FIG. 8 is a plan view of an insulating film to which an adhesive is applied, FIG. 8 is a diagram showing a structure for attaching a resistance foil to a strain gauge attaching member, FIG. 9 is a diagram showing a structure of the strain gauge, and FIG. 9 (b) is a top view thereof, FIG. 10 is a view showing a state where a seat leg side fixed end, a strain gauge mounting member and a floor plate side fixed end are separated, and FIG. 11 is a seat leg side fixed end. It is a figure showing the state where the strain gauge attachment member and the floor plate side fixed end were welded and integrated.
【0039】図4に示したZ形片持梁を、図5に示すよ
うに、ひずみゲージを取付ける前のひずみゲージ取付け
部材10の形状に分離する。つまり、図10に示すよう
に、座席脚側固定端8,ひずみゲージ取付け部材10,
床板側固定端9の3個に分離する。実際の加工工程では
ステンレス鋼材から座席脚側固定端8,床板側固定端9
をプレス機で打ち抜き、面を機械加工して作製する。ま
た、ひずみゲージ取付け部材10をステンレス角棒材か
ら機械加工して作製する。The Z-shaped cantilever shown in FIG. 4 is separated into the shape of the strain gauge mounting member 10 before the strain gauge is mounted, as shown in FIG. That is, as shown in FIG. 10, the seat leg side fixed end 8, the strain gauge mounting member 10,
Separate into three fixed ends 9 on the floor side. In the actual processing step, the seat leg side fixed end 8 and the floor plate side fixed end 9 are made of stainless steel.
Is punched out by a press machine, and the surface is machined to produce. The strain gauge mounting member 10 is manufactured by machining a stainless steel bar.
【0040】次いで、四角形断面の角材から機械加工し
て作製したひずみゲージ取付け部材10をひずみゲージ
取付け面を上下にして多数平面に整列させ枠等で押さえ
平面性を保持して図6に示すように並べる。Next, the strain gauge mounting member 10 manufactured by machining from a square bar having a rectangular cross section is aligned on a large number of planes with the strain gauge mounting surface up and down, and is held by a frame or the like to maintain flatness, as shown in FIG. Line up.
【0041】図6では30個(1) 〜(30)のひずみゲージ
取付け部材10が並べられている。並べられているゲー
ジ取付け部材10の上下平面を洗浄処理した後、図7に
示す他の作業場で予め耐熱性を所持する絶縁フィルム1
1(例えば、ポリイミド樹脂フィルム)の両面に加熱、
加圧硬化型接着剤12および13(例えばポリイミド変
性接着剤)を塗布し、両面の溶剤を発散させた(Bステ
ージ状態)絶縁フィルム11を、ひずみゲージ取付け部
材10の上下に置き、更に、ひずみゲージ5の抵抗素子
となる極薄い抵抗箔14を洗浄処理して重ねる。この状
況を図8に示す。これらを同時に加熱・加圧盤15に挟
んで加熱・加圧硬化して一度に抵抗箔14の取り付けを
ひずみゲージ取付け部材10上へ完了させる。In FIG. 6, 30 (1) to (30) strain gauge mounting members 10 are arranged. After cleaning the upper and lower flat surfaces of the arranged gauge mounting members 10, the insulating film 1 having heat resistance in advance in another work place shown in FIG.
1 (for example, polyimide resin film)
The pressure-curable adhesives 12 and 13 (for example, a polyimide-modified adhesive) are applied, and the insulating film 11 on both sides on which the solvent is diverged (B stage state) is placed above and below the strain gauge mounting member 10. The ultra-thin resistive foil 14 serving as the resistive element of the gauge 5 is washed and laminated. This situation is shown in FIG. These are simultaneously sandwiched between the heating / pressing plate 15 and heated / pressurized and cured to complete the mounting of the resistance foil 14 on the strain gauge mounting member 10 at a time.
【0042】この工程の後は、ひずみゲージの製作工程
と同じであるが整列した多数のひずみゲージ取付け部材
毎に各工程で同時に作製する。例えば、露光レジスト塗
布、露光、抵抗箔材を必要な形状を残し、他を除去する
エッチング工程を経て最後に、ひずみゲージ取付け部材
10の輪郭に合わせてレーザーカッター機で抵抗箔1
4、ポリイミド樹脂フィルム11を切断すると、図9に
示すひずみゲージ5が得られる。After this step, it is the same as the manufacturing step of the strain gauge, but is simultaneously manufactured in each step for each of a number of strain gauge mounting members arranged. For example, an exposure resist coating, exposure, an etching process for leaving the required shape of the resistive foil material and removing the others, and finally, adjusting the resistive foil 1 with a laser cutter machine in accordance with the contour of the strain gauge mounting member 10.
4. When the polyimide resin film 11 is cut, a strain gauge 5 shown in FIG. 9 is obtained.
【0043】さらに、ひずみゲージの抵抗値調整、回路
形成作業を完了した後、電子ビーム溶接機で座席脚側固
定端8の側面とひずみゲージ取付け部材10の端面、床
板側固定端9の側面とひずみゲージ取付け部材10の端
面を図11に示す位置で溶接する。この時ポリイミドフ
ィルム、ポリイミド変性接着剤は接着強度は約300℃
まで失われないので溶接熱による悪影響は避けられる。
また、エッチング液は酸化剤であるがひずみゲージ取り
付け部材の材質をステンレス鋼にしておくので錆びるこ
とはない。Furthermore, after the resistance value adjustment of the strain gauge and the circuit forming operation are completed, the side surface of the seat leg side fixed end 8, the end surface of the strain gauge mounting member 10, and the side surface of the floor plate side fixed end 9 are formed by an electron beam welding machine. The end face of the strain gauge mounting member 10 is welded at the position shown in FIG. At this time, the adhesive strength of the polyimide film and the polyimide-modified adhesive is about 300 ° C.
No adverse effects due to welding heat can be avoided since they are not lost.
Although the etching solution is an oxidizing agent, the material of the strain gauge mounting member is made of stainless steel, so that it does not rust.
【0044】次に、本発明の実施例を示すZ形片持梁荷
重センサの水平軸回りの捩じれに対しての過負荷強度の
増強対策について説明する。Next, a measure for increasing the overload strength against twisting around the horizontal axis of the Z-shaped cantilever load sensor according to the embodiment of the present invention will be described.
【0045】図14は上部補強板と下部補強板を示す図
であり、図14(a)は上部補強板の構造を示す図、図
14(b)は下部補強板の構造を示す図である。図15
は荷重センサ全体を示す図であり、図15(a)はその
平面図、図15(b)はその側面図である。FIG. 14 is a diagram showing an upper reinforcing plate and a lower reinforcing plate. FIG. 14 (a) is a diagram showing the structure of the upper reinforcing plate, and FIG. 14 (b) is a diagram showing the structure of the lower reinforcing plate. . FIG.
FIG. 15A is a view showing the entire load sensor, FIG. 15A is a plan view thereof, and FIG. 15B is a side view thereof.
【0046】Z形片持梁荷重センサの水平軸回りの捩じ
れに対して強度を付加するために、図14に示すよう
に、1〜2mm程度の鋼板でプレス加工された上部補強
板16と、下部補強板17を設ける。これらをZ形片持
梁荷重センサをサンドウィッチにして両端に点溶接1
8,19し、一体構造にする。補強板の幅を大きくして
おくと捩じれ強度は増強し、且つ、座席脚側固定端8と
床板側固定端9をナットで締付緊締する時Z形片持梁荷
重センサに締付け時の捩じりモーメントを除くことがで
き、Z形片持梁荷重センサは保護される。且つ、ひずみ
ゲージを取付けた位置が固定部より離れているので締付
け時の応力集中の影響を受けないことと相応して、測定
時の零点移動を最小にすることができる。As shown in FIG. 14, an upper reinforcing plate 16 pressed with a steel plate having a thickness of about 1 to 2 mm to add strength against twisting about the horizontal axis of the Z-shaped cantilever load sensor. A lower reinforcing plate 17 is provided. These are spot welded to both ends using a Z-shaped cantilever load sensor as a sandwich 1
8, 19, to form an integrated structure. When the width of the reinforcing plate is increased, the torsional strength is increased, and when the seat leg-side fixed end 8 and the floor plate-side fixed end 9 are tightened and tightened with nuts, the screw when tightening the Z-shaped cantilever load sensor is tightened. The torsion moment can be eliminated and the Z-shaped cantilever load sensor is protected. In addition, since the position where the strain gauge is attached is far from the fixed portion, the movement of the zero point at the time of measurement can be minimized in correspondence with the fact that it is not affected by the stress concentration at the time of tightening.
【0047】なお、本発明は上記実施例に限定されるも
のではなく、本発明の趣旨に基づいて種々の変形が可能
であり、これらを本発明の範囲から排除するものではな
い。It should be noted that the present invention is not limited to the above-described embodiment, but various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.
【0048】[0048]
【発明の効果】以上、詳細に説明したように、本発明に
よれば、以下のような効果を奏することができる。As described above, according to the present invention, the following effects can be obtained.
【0049】(A)搭乗者の座席における荷重を的確に
検出するとともに、所要スペースが少なく、かつ容易に
装着できる形状の着座荷重センサを提供することができ
る。(A) It is possible to provide a seating load sensor that accurately detects the load on the passenger's seat, requires a small space, and can be easily mounted.
【0050】すなわち、座席から負荷される荷重は走行
中の車両の急旋回、急ブレーキや衝突事故が発生した時
は鉛直荷重のみでなく、傾斜荷重、座席の前後、左右に
曲げモーメントを受けてもその影響は少なく、重力方向
のみの荷重を確実に測定することができる。That is, the load applied from the seat is not limited to a vertical load in the event of a sudden turning, sudden braking, or collision of the running vehicle. The influence is small, and the load only in the direction of gravity can be reliably measured.
【0051】また、座席側、床板側の固定部に長期間の
使用で若干のゆるみが発生しても測定値が変化すること
がなく、信頼性が高い。Further, even if the fixed portions on the seat side and the floorboard side are slightly loosened due to long-term use, the measured values do not change and the reliability is high.
【0052】(B)梁を長方向に対し角度をつけたZ形
状にすることにより、広い面積で片持梁の長さを長くす
ることができ、ひずみゲージの取り付けが容易であり、
且つ、溶接器の局所溶接での熱的影響を少なくすること
ができる。(B) By making the beam into a Z shape having an angle with respect to the longitudinal direction, the length of the cantilever can be increased over a wide area, and the strain gauge can be easily attached.
In addition, it is possible to reduce the thermal effect of the local welding of the welder.
【0053】(C)荷重センサをナットで緊締固定する
時は、Z形片持梁荷重センサと一体となって固定され、
Z形片持梁荷重センサに締付け時の捩じりモーメントを
除くことができ、Z形片持梁荷重センサは保護される。(C) When the load sensor is tightly fixed with a nut, the load sensor is fixed integrally with the Z-shaped cantilever load sensor.
The torsional moment when tightening the Z-shaped cantilever load sensor can be eliminated, and the Z-shaped cantilever load sensor is protected.
【0054】(D)着座荷重センサの作製にあたって
は、最小の部品数で、取付け工数を少なくすることがで
きる。(D) In manufacturing the seating load sensor, the number of mounting steps can be reduced with the minimum number of parts.
【図1】本発明の実施例を示す荷重センサを有する搭乗
者座席の側面図である。FIG. 1 is a side view of a passenger seat having a load sensor according to an embodiment of the present invention.
【図2】本発明の実施例を示す荷重センサを有する搭乗
者座席の裏面図である。FIG. 2 is a rear view of a passenger seat having a load sensor according to the embodiment of the present invention.
【図3】本発明の第1実施例を示す片持梁形状の荷重セ
ンサの側面図である。FIG. 3 is a side view of a cantilever-shaped load sensor according to the first embodiment of the present invention.
【図4】本発明の第1実施例を示す片持梁形状の荷重セ
ンサを取り付けた状況を示す平面図である。FIG. 4 is a plan view showing a situation in which a cantilever-shaped load sensor according to the first embodiment of the present invention is mounted.
【図5】本発明の第1実施例を示すひずみゲージ取り付
け部材の上面図である。FIG. 5 is a top view of a strain gauge mounting member according to the first embodiment of the present invention.
【図6】本発明の第1実施例を示すひずみゲージ取り付
け部材のひずみゲージ取付け面を上下にして多数平面に
整列させた状態を示す平面図である。FIG. 6 is a plan view showing a state in which the strain gauge mounting surface of the strain gauge mounting member according to the first embodiment of the present invention is vertically aligned on a large number of planes.
【図7】Bステージ状態の接着剤が塗布された絶縁フィ
ルムの平面図である。FIG. 7 is a plan view of an insulating film coated with an adhesive in a B-stage state.
【図8】ひずみゲージ取り付け部材への抵抗箔の取り付
け構造を示す図である。FIG. 8 is a view showing a structure for attaching a resistance foil to a strain gauge attachment member.
【図9】ひずみゲージの構造を示す図である。FIG. 9 is a view showing a structure of a strain gauge.
【図10】座席脚側固定端、ひずみゲージ取付け部材、
床板側固定端が分離された状態を示す図である。FIG. 10 shows a seat leg side fixed end, a strain gauge mounting member,
It is a figure showing the state where the floor board side fixed end was separated.
【図11】座席脚側固定端、ひずみゲージ取付け部材お
よび床板側固定端が溶接されて一体化された状態を示す
図である。FIG. 11 is a view showing a state where a seat leg side fixed end, a strain gauge mounting member, and a floor plate side fixed end are welded and integrated.
【図12】従来の荷重センサの構造を示す図である。FIG. 12 is a view showing the structure of a conventional load sensor.
【図13】従来のひずみゲージを使用して荷重センサを
作製する方法の説明図である。FIG. 13 is an explanatory diagram of a method of manufacturing a load sensor using a conventional strain gauge.
【図14】本発明の実施例を示すZ形片持梁荷重センサ
の補強板の構造を示す図である。FIG. 14 is a diagram showing a structure of a reinforcing plate of a Z-shaped cantilever load sensor showing an embodiment of the present invention.
【図15】本発明の実施例を示すZ形片持梁荷重センサ
全体を示す図である。FIG. 15 is a diagram illustrating an entire Z-shaped cantilever load sensor according to an embodiment of the present invention.
1 搭乗者座席 2 座席脚 3 荷重センサ(荷重検出素子) 4 自動車床板 5 ひずみゲージ 7 人体荷重 8 座席脚側固定端 9 床板側固定端 10 ひずみゲージ取付け部材 11 絶縁フィルム 12 ひずみゲージ取付け部材との間の加熱、加圧硬
化型接着剤 13 抵抗箔との間の加熱、加圧硬化型接着剤 14 抵抗箔 15 加熱・加圧盤 16 上部補強板 17 下部補強板 18,19 点溶接DESCRIPTION OF SYMBOLS 1 Occupant seat 2 Seat leg 3 Load sensor (load detection element) 4 Automobile floor plate 5 Strain gauge 7 Human body load 8 Seat leg side fixed end 9 Floor plate side fixed end 10 Strain gauge attachment member 11 Insulation film 12 Strain gauge attachment member Heating and pressure-curing adhesive between the resistance 13 Heating and pressure-curing adhesive between the resistance foil 14 Resistance foil 15 Heating / pressing plate 16 Upper reinforcing plate 17 Lower reinforcing plate 18, 19-point welding
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI G01L 1/22 G01L 1/22 L (58)調査した分野(Int.Cl.7,DB名) G01G 19/12,19/44,19/52 G01G 3/14 G01B 7/16 G01L 1/22 B60N 2/00,5/00 B60R 21/00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 identification code FI G01L 1/22 G01L 1/22 L (58) Investigated field (Int.Cl. 7 , DB name) G01G 19 / 12,19 / 44,19 / 52 G01G 3/14 G01B 7/16 G01L 1/22 B60N 2 / 00,5 / 00 B60R 21/00
Claims (4)
車床板間に荷重検出素子を取り付けて自動車の衝突時の
搭乗者席毎の搭乗荷重を測定する着座荷重センサにおい
て、前記荷重検出素子は電気抵抗箔を使用したひずみゲ
ージを片持梁のひずみゲージ取り付け部材の側面に取付
け、前記片持梁を長方向に対し角度をつけて固定端と連
結したZ形形状となし、人体の着座時の荷重を剪断ひず
みから検出することを特徴とする着座荷重センサ。1. A seating load sensor for mounting a load detecting element between a seat leg below a passenger seat of an automobile and a floor plate of an automobile and measuring a riding load of each passenger seat at the time of an automobile collision.
The load detecting element is a strain gauge using an electric resistance foil.
To the side of the cantilever strain gauge mounting member
Connecting the cantilever with the fixed end at an angle to the longitudinal direction.
No tied Z-shape, shearing load when the human body is sitting
A seating load sensor characterized in that it is detected only from the seat.
て、前記座席脚の4脚に荷重検出素子を取り付けること
を特徴とする着座荷重センサ。2. The seat load sensor according to claim 1, wherein a load detecting element is attached to four of said seat legs.
て、前記ひずみゲージ取付け部は上下にプレス加工され
た補強板によりZ形片持梁荷重センサをサンドウィッチ
状に挟んで左右両端を点溶接した一体化してなることを
特徴とする着座荷重センサ。3. The seat load sensor according to claim 1 , wherein the strain gauge mounting portion is formed by sandwiching a Z-shaped cantilever load sensor in a sandwich manner with a reinforcing plate pressed up and down and spot welding right and left ends thereof. A seating load sensor characterized in that it is formed into a structure.
車床板間に取り付けられる片持梁荷重センサの斜め形状
のひずみゲージ取付け部材を四角形断面の角材から機械
加工して作製し、ひずみゲージの作製と荷重センサのひ
ずみゲージ取付け部材へのひずみゲージの取付けを同時
に行い、絶縁フィルムの両面に塗布され溶剤を発散させ
たBステージ状態の接着剤を使用し、抵抗箔を重ねて一
回の加熱、加圧で荷重センサの表面にひずみゲージを取
付けることを特徴とする着座荷重センサの作製方法。4. A seat leg under a passenger seat of an automobile and an automatic
The oblique strain gauge mounting member of the cantilever load sensor to be installed between the car floor plates is machined from a square cross-section bar, and the machine is manufactured. The strain gauge is manufactured and the strain gauge is mounted on the strain sensor mounting member of the load sensor. At the same time, use a B-stage adhesive applied to both sides of the insulating film and allowing the solvent to emanate, use a layer of resistive foil and heat and press once to attach a strain gauge to the surface of the load sensor. A method for manufacturing a seating load sensor, which is a feature.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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JP2000177760A JP3289005B2 (en) | 2000-06-14 | 2000-06-14 | Seating load sensor and manufacturing method thereof |
PCT/JP2001/005003 WO2001096820A1 (en) | 2000-06-14 | 2001-06-13 | Seating load sensor and method of manufacturing the load sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000177760A JP3289005B2 (en) | 2000-06-14 | 2000-06-14 | Seating load sensor and manufacturing method thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001356042A JP2001356042A (en) | 2001-12-26 |
JP3289005B2 true JP3289005B2 (en) | 2002-06-04 |
Family
ID=18679305
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Application Number | Title | Priority Date | Filing Date |
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JP2000177760A Expired - Fee Related JP3289005B2 (en) | 2000-06-14 | 2000-06-14 | Seating load sensor and manufacturing method thereof |
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JP (1) | JP3289005B2 (en) |
WO (1) | WO2001096820A1 (en) |
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---|---|---|---|---|
EP1929901B1 (en) * | 2005-08-11 | 2012-10-10 | Kurabe Industrial Co., Ltd | Heating device for seat |
KR101365046B1 (en) * | 2012-08-31 | 2014-02-21 | 한국건설기술연구원 | Piezo axle sensor and method thereof |
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JPS5276052A (en) * | 1975-12-22 | 1977-06-25 | Tadashi Gen | Completion system of twoostep adhesion type strain converter and semisolid strain gauge element |
JP3646378B2 (en) * | 1995-11-30 | 2005-05-11 | アイシン精機株式会社 | Vehicle seat device |
JP3683712B2 (en) * | 1998-06-05 | 2005-08-17 | タカタ株式会社 | Seat weight measuring device |
-
2000
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2001
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WO2001096820A1 (en) | 2001-12-20 |
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