JPH076042Y2 - Safety belt device with re-tightening device - Google Patents
Safety belt device with re-tightening deviceInfo
- Publication number
- JPH076042Y2 JPH076042Y2 JP5874688U JP5874688U JPH076042Y2 JP H076042 Y2 JPH076042 Y2 JP H076042Y2 JP 5874688 U JP5874688 U JP 5874688U JP 5874688 U JP5874688 U JP 5874688U JP H076042 Y2 JPH076042 Y2 JP H076042Y2
- Authority
- JP
- Japan
- Prior art keywords
- safety belt
- gear
- winding shaft
- tightening device
- inner peripheral
- 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 - Lifetime
Links
Landscapes
- Automotive Seat Belt Assembly (AREA)
Description
【考案の詳細な説明】 [産業上の利用分野] この考案は、車両の衝突事故時に、衝撃を感知したセン
サーが安全ベルト装置に付設した再引締装置を触発し、
ベルトを巻取軸に瞬間的に巻取ることにより、ベルトの
緩みを除去するようにした再引締装置付き安全ベルト装
置に関する。[Detailed Description of the Invention] [Industrial field of application] In the present invention, in the event of a vehicle collision, a sensor that senses an impact triggers a re-tightening device attached to a safety belt device,
The present invention relates to a safety belt device with a re-tightening device that removes looseness of a belt by instantaneously winding the belt around a winding shaft.
[従来の技術] 車両の衝突事故から乗員を保護する安全ベルト装置は、
巻取軸を付勢するばねの力でベルトを巻取る構成である
が、その巻取りは、竪締めでなく緩みがあるから、2次
衝突の場合には、その緩みの長さ分が繰り出される所謂
フイルムスプール現象が起き、それだけ乗員の頭胸部が
座席から前方へ移動し易くなる。この危険を防止するた
めに、安全ベルト装置に再引締装置を付設したものが提
供されている。この再引締装置は、車両の衝突を感知す
るセンサーがガスジェネレーターを触発してシリンダー
内にガスを発生させ、ピストンがシリンダー内を移動
し、そのピストンに連結された索条体が安全ベルト装置
の巻取軸に軸着したプーリーを回転させることにより、
瞬間的にベルトの緩みを除去して乗員を座席に拘束する
ようにしたものである。[Prior Art] A safety belt device for protecting an occupant from a vehicle collision accident is
The belt is wound by the force of the spring that urges the winding shaft. However, the winding has looseness instead of vertical tightening, so in the case of a secondary collision, the length of the looseness is extended. The so-called film spool phenomenon occurs, which makes it easier for the occupant's head and chest to move forward from the seat. In order to prevent this danger, a safety belt device provided with a re-tightening device is provided. In this re-tightening device, a sensor that detects a vehicle collision triggers the gas generator to generate gas in the cylinder, the piston moves in the cylinder, and the cord connected to the piston acts as a safety belt device. By rotating the pulley attached to the winding shaft,
The slack of the belt is removed momentarily to restrain the occupant in the seat.
ところで、上記再引締装置はピストンで引かれる索条体
が常時はプーリーから離れた位置にあるため、索条体が
引かれてもプーリーが直ちに回転することなく、索条体
がプーリーに巻き付くまでの時間的なロスが生じて速効
性にやや欠ける面がある。そこで、出願人は、索条体が
常時摺接しているが、巻取軸とは離れて位置する複数個
のコマを設けた再引締装置付き安全ベルト装置について
の特許出願をした(特願昭62−326049号 昭和62年12月
23日)。By the way, in the above-mentioned re-tightening device, since the cord body pulled by the piston is always located away from the pulley, even if the cord body is pulled, the pulley does not immediately rotate and the cord body winds around the pulley. However, there is a loss of time to reach the point where the immediate effect is somewhat lacking. Therefore, the applicant has filed a patent application for a safety belt device with a re-tightening device in which a plurality of tops are provided which are located in a slidable contact with the cord body, but are separated from the winding shaft (Japanese Patent Application No. No. 62-326049 December 1987
The 23rd).
[考案が解決しようとする問題点] しかしながら、上記出願の再引締装置によれば、複数個
のコマは円弧形であって、内周面全域には歯部が形成さ
れているから、索条体が作動して各コマを巻取軸に軸着
した歯車と係合させるとき、第5図に示したように、各
コマaの内周面両端部b,bが初めに歯車cと当接し、内
周面の歯部全体dが歯車cと噛合するのを阻止する傾向
となる。したがって、巻取軸eを瞬時に回転させるべき
力の損失が生じて効果的な巻取り作用をなし難い面を有
している。[Problems to be Solved by the Invention] However, according to the re-tightening device of the above application, since the plurality of tops are arc-shaped and the tooth portions are formed over the entire inner peripheral surface, When the strips are actuated to engage the respective tops with the gears pivotally attached to the winding shaft, as shown in FIG. 5, the inner peripheral surface end portions b and b of the respective tops a are initially connected to the gear c. The abutment tends to prevent the entire tooth portion d on the inner peripheral surface from meshing with the gear c. Therefore, there is a loss of a force for instantly rotating the winding shaft e, which makes it difficult to achieve an effective winding action.
そこで、この考案は上記事情に鑑みて、再引締装置付き
安全ベルト装置の改良を目的としてなされたものであ
る。In view of the above circumstances, the present invention has been made to improve the safety belt device with the re-tightening device.
[問題点を解決するための手段] この考案は上記問題点を解決するため、上記出願の如き
再引締装置付き安全ベルト装置において、前記コマの内
周面略中央部に弧状歯部を残し、内周面両端部近傍を切
り欠いて無歯部を形成してなる再引締装置付き安全ベル
ト装置を構成した。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a safety belt device with a re-tightening device as in the above-mentioned application, in which an arc-shaped tooth portion is left in a substantially central portion of an inner peripheral surface of the top, A safety belt device with a re-tightening device was constructed by cutting out the vicinity of both ends of the inner peripheral surface to form a toothless portion.
[作用] この考案の上記構成によれば、環状体を複数個に分割し
てなる円弧状のコマは、索条体が引かれて巻取軸側へ移
動して歯車と噛合する際、内周面の両端部近傍が切り欠
かれて無歯部を形成しているので、その無歯部は歯車と
当接することなく、弧状歯部のみが歯車と噛合できるか
ら、索条体がコマに与える回転力を損失させることなく
歯車に伝達する。[Operation] According to the above configuration of the present invention, the arc-shaped top formed by dividing the annular body into a plurality of parts is used when the cord body is pulled to move to the winding shaft side and meshes with the gear. Since the toothless part is formed by cutting out the vicinity of both ends of the peripheral surface, the toothless part can mesh with the gear without contacting the gear, and therefore the cord body is in the top. It transmits the applied torque to the gear without loss.
[実施例] 次にこの考案の実施例を図面に基づき説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.
第1図は分解斜視図、第2図は要部の正面図、第3図は
第2図III−III線断面図、第4図は作用説明図である。FIG. 1 is an exploded perspective view, FIG. 2 is a front view of a main part, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG.
第1図に示したように、金属板を略コ形に曲げ形成して
なるハウジング1に、巻取軸2が回転自在に支承され、
その巻取軸2にはスプール3が一体的に回転可能に支承
され、そのスプール3にはベルト4の一端部が止着され
ている。ハウジング1の片側には、巻取軸2の一端部に
カバー5で覆われたロックパウル機構が取付けられてお
り、そのロックパウル機構は図示しないが、巻取軸2に
固定したラチェットとそのラチェットに係脱する爪を備
えた振り子を有する公知の構成である。またハウジング
1の他側にはガスジェネレーター6をホルダー7を介し
て取り付ける支持部8が形成されている。一方、巻取軸
2の他端外周部には歯部9が形成され、この歯部9の先
端部には割り溝10が形成されている。上記ハウジング1
の側面に密着して着脱可能なケーシング11が設けられ、
そのケーシング11には巻取軸2を貫通させる透孔12及び
その透孔12を中心として所定半径の円形をした凹部13が
形成され、またその凹部13と連通する溝14がその一端部
に外方への開口部15を有し、パイプスプリング16を有す
る曲部を構成し、他端部を閉じて収納室17として一連に
形成されている。ケーシング11の凹部13には、透孔12に
嵌合して、巻取軸2と係合する歯車18が設けられる。歯
車18は内周歯部19を有し、その内周歯部19が巻取軸2の
歯部9に噛合する。そして、凹部13内において、歯車18
を中心として複数個のコマ20が歯車18と係脱可能に設け
られる。このコマ20は、環状体を例えば四個の等分に分
割してなるもので、円周面略中央部に上記歯車18と噛合
する弧状歯部21を形成するとともに、その両端部近傍に
切り欠き部20aを形成して無歯部20bを形成し、かつ、外
周面に溝22を形成してなる。各コマ20は弾性体たるコイ
ルばね23でそれぞれ連結されており、またそのコイルば
ね23で拡径されていて、常時には弧状歯部21が歯車18と
噛合しないように付勢されている。各コマ20の周溝22は
適宜の凹凸表面を形成して摩擦係数が向上するようにし
てある。そして、この溝22にはワイヤなどの索条体24が
数回巻回されて包囲し、その索条体24の一端部は、溝14
の開口部15を経て前記ガスジェネレーター6に螺合して
一体構成されるジョイント25を気密に貫通し、そのジョ
イント25に一端部が連結固定されるシリンダー26に導入
され、かつ、そのシリンダー26内に移動可能に挿入され
たピストン27と連結されて再引き締め装置を形成してい
る。索条体24の他端部は各コマ20の溝22を数回巻回して
後、前記ケーシング11の溝14を経て曲部においてパイプ
スプリング16に摺接し、更に溝14の収納室17に自由端と
して収納されている。シリンダー26はピストン27の所要
の移動距離を確保できる所定の長さを有し、その他端部
は先細で外部に開口している。上記各コマ20を凹部13に
収納してこれを覆うカバーケーシング28が、複数本のね
じ29でケーシング11に着脱可能に設けられ、その軸孔30
から巻取軸2の割り溝10が外方へ突出し、その割り溝10
に一端部が係合して止着される巻取りばね31がばねケー
シング32,33に収納されて設けられている。ばねケーシ
ング32,33はカバーケーシング28にその対角線に沿う2
点でねじ29で固定されるものであり、前記巻取りばね31
の他端部を止着するフック部34がばねケーシング33の内
周面に形成されている。As shown in FIG. 1, a winding shaft 2 is rotatably supported by a housing 1 formed by bending a metal plate into a substantially U shape.
A spool 3 is integrally rotatably supported on the winding shaft 2, and one end of a belt 4 is fixed to the spool 3. A lock pawl mechanism covered by a cover 5 is attached to one end of the winding shaft 2 on one side of the housing 1. The lock pawl mechanism is not shown, but a ratchet fixed to the winding shaft 2 and the ratchet thereof. It is a known configuration having a pendulum with a pawl that engages and disengages. Further, on the other side of the housing 1, a support portion 8 to which the gas generator 6 is attached via a holder 7 is formed. On the other hand, a tooth portion 9 is formed on the outer peripheral portion of the other end of the winding shaft 2, and a split groove 10 is formed on the tip portion of the tooth portion 9. The housing 1
A detachable casing 11 is provided in close contact with the side surface of the
The casing 11 is formed with a through hole 12 for penetrating the winding shaft 2 and a concave portion 13 having a circular shape with a predetermined radius around the through hole 12, and a groove 14 communicating with the concave portion 13 is formed at one end thereof. A curved portion having a pipe spring 16 is formed with an opening 15 toward one side, and the other end is closed to form a series as a storage chamber 17. A gear 18 that fits into the through hole 12 and engages with the winding shaft 2 is provided in the recess 13 of the casing 11. The gear 18 has an inner peripheral tooth portion 19, and the inner peripheral tooth portion 19 meshes with the tooth portion 9 of the winding shaft 2. Then, in the recess 13, the gear 18
A plurality of tops 20 are provided so that they can be engaged with and disengaged from the gear 18 centering around. This top 20 is formed by dividing an annular body into, for example, four equal parts, and forms an arc-shaped tooth portion 21 that meshes with the gear 18 at a substantially central portion of the circumferential surface, and cuts in the vicinity of both end portions thereof. The notch portion 20a is formed to form the toothless portion 20b, and the groove 22 is formed on the outer peripheral surface. The respective tops 20 are connected to each other by a coil spring 23 which is an elastic body, and are expanded in diameter by the coil spring 23 so that the arcuate tooth portion 21 is normally urged so as not to mesh with the gear 18. The circumferential groove 22 of each top 20 is formed with an appropriate uneven surface to improve the friction coefficient. Then, a cord body 24 such as a wire is wound around and surrounded by the groove 22 several times, and one end portion of the cord body 24 is surrounded by the groove 14
Through a joint 25, which is screwed into the gas generator 6 through the opening 15 of the same, and hermetically penetrates the joint 25, and one end of which is connected and fixed to the cylinder 26 and is introduced into the cylinder 26. And a piston 27 movably inserted therein to form a re-tightening device. The other end of the cord 24 is wound around the groove 22 of each top 20 several times, and then slidably contacts the pipe spring 16 at the curved portion through the groove 14 of the casing 11 and further freely in the storage chamber 17 of the groove 14. It is stored as the end. The cylinder 26 has a predetermined length that can secure the required movement distance of the piston 27, and the other end is tapered and is open to the outside. A cover casing (28) for accommodating each of the tops (20) in the recess (13) and covering the recess (13) is detachably attached to the casing (11) by a plurality of screws (29) and has a shaft hole (30).
The split groove 10 of the winding shaft 2 protrudes from the
A winding spring 31 whose one end is engaged and fixed is provided by being housed in the spring casings 32 and 33. The spring casings 32 and 33 are provided on the cover casing 28 along the diagonal line thereof.
It is fixed by a screw 29 at a point, and the winding spring 31
A hook portion 34 for fixing the other end of the spring casing 33 is formed on the inner peripheral surface of the spring casing 33.
上記実施例の作用について説明すると、車両の衝突事故
に際し、車体の前部に配設したセンサーが衝撃を受ける
と、ガスジェネレーター6の内部に装填された火薬が爆
発して瞬時に多量のガスがシリンダー26内に流れ込み、
これによりピストン27がシリンダー26の先細の端部に向
けて瞬間的に移動する。ピストン27が移動すると索条体
24がシリンダー26側へ引かれるが、索条体24の一部は溝
14の曲部においてパイプスプリング16に摺接して若干の
摩擦抵抗を受けるので、索条体24は各コマ20に摺接し
て、それを回転させると同時に縮径させる。このため、
各コマ20の無歯部20b,20bが初めに歯車18と接触するこ
とはなく、直ちに弧状歯部21が歯車18と噛合し、歯車18
の内周歯部19と噛合する歯部9を介して巻取軸2は強制
的に回転される。したがって、スプール3は巻取軸2と
一体として回転するため、ベルト4は急速にスプール3
に巻き取られ、その緩みが消滅する。かくして、ベルト
4の緩みが消滅して乗員は座席に密着して拘束され、衝
撃による反動で身体が前方に大きく移動するのを防止し
て所謂2次衝突が阻止されるのである。そして、索条体
24の移動が停止すれば、各コマ20はコイルばね23の力で
互いに径方向へ拡開するので、弧状歯部21と歯車18との
噛合は解除され、巻取軸2は各コマ20に関係なく回転で
きるようになる。したがって、乗員は上記のようにして
引き締められたベルト4を再び繰り出し、車両から緊急
脱出をするのが容易となる。The operation of the above-described embodiment will be described. In the event of a vehicle collision accident, when a sensor arranged in the front part of the vehicle body receives an impact, the explosive charged inside the gas generator 6 explodes and a large amount of gas is instantly generated. It flows into the cylinder 26,
This causes the piston 27 to move momentarily toward the tapered end of the cylinder 26. Strand body when piston 27 moves
24 is pulled to the cylinder 26 side, but part of the cord 24 is a groove
Since the curved portion 14 slides on the pipe spring 16 and receives some frictional resistance, the cord 24 slides on each top 20 to rotate it and reduce its diameter at the same time. For this reason,
The toothless portions 20b, 20b of each top 20 do not first come into contact with the gear 18, and the arcuate tooth portion 21 immediately meshes with the gear 18, so that the gear 18
The winding shaft 2 is forcibly rotated through the tooth portion 9 that meshes with the inner peripheral tooth portion 19 of the. Therefore, since the spool 3 rotates integrally with the take-up shaft 2, the belt 4 rapidly moves.
It is taken up by and is loosened. Thus, the looseness of the belt 4 disappears, the occupant is tightly bound to the seat and restrained, and the so-called secondary collision is prevented by preventing the body from moving largely forward due to the reaction due to the impact. And the striatum
When the movement of 24 is stopped, the respective tops 20 are expanded in the radial direction by the force of the coil spring 23, so that the meshing between the arc-shaped tooth portion 21 and the gear 18 is released, and the winding shaft 2 is moved to the respective tops 20. It will be able to rotate regardless. Therefore, it becomes easy for the occupant to take out the belt 4 tightened as described above again and make an emergency escape from the vehicle.
なお、上記実施例において、巻取軸2には歯車18を軸着
したが、歯車18はコマ20に伝達される回転力を可及的に
大きくするためであって、歯車18は必ずしも設けなくと
もよい。また、コマ20は図示において4個に分割した構
成であるが、3個若しくは2個でもよい。In the above embodiment, the gear 18 is attached to the winding shaft 2. However, the gear 18 is for maximizing the rotational force transmitted to the top 20, and the gear 18 is not necessarily provided. Good. The top 20 is divided into four pieces in the drawing, but may be three pieces or two pieces.
[考案の効果] 以上記載したこの考案によれば、巻取軸若しくはこれに
軸着した歯車を包囲して配設された複数個の円弧形のコ
マを備えた再引締装置付安全ベルト装置において、前記
コマの内周面略中央部に弧状歯部を残し、内周面両端部
近傍を切り欠いて無歯部を形成してなるから、索条体が
引かれてコマが歯車に移動する際、コマの内周面両端部
が初めに巻取軸若しくは歯車と接触することなく、弧状
歯部が確実に巻取軸若しくは歯車と噛合してコマに伝達
された回転力を歯車に伝達できるため、再引締装置の効
果的な作動ができる。また、コマは多数個が効果的であ
るから、内周面略中央部にのみ弧状歯部を形成すること
により、コマを小さく形成できる、などの効果を奏す
る。[Advantages of the Invention] According to the invention described above, a safety belt device with a re-tightening device including a plurality of arc-shaped tops arranged surrounding a winding shaft or a gear mounted on the winding shaft. In the above, since the arcuate tooth portion is left in the substantially central portion of the inner peripheral surface of the top and the toothless portion is formed by cutting out the vicinity of both end portions of the inner peripheral surface, the cord body is pulled and the top moves to the gear. In this case, both ends of the inner peripheral surface of the top do not contact the take-up shaft or gears first, and the arcuate tooth portion surely meshes with the take-up shaft or gears to transmit the rotational force transmitted to the top to the gears. Therefore, the re-tightening device can be effectively operated. Further, since a large number of tops are effective, the tops can be formed small by forming the arcuate tooth portions only in the substantially central portion of the inner peripheral surface.
図面はこの考案の実施例を示し、第1図は分解斜視図、
第2図は要部正面図、第3図は第2図III−III線断面
図、第4図は要部の作用説明図、第5図は考案の課題を
説明する為の模式図である。 1…ハウジング、2…巻取軸、3…スプール、4…ベル
ト、6…ガスジェネレーター、9…歯部、11…ケーシン
グ、13…凹部、14…溝、15…開口部、16…パイプスプリ
ング、17…収納室、18…歯車、19…内周歯部、20…コ
マ、20a…切り欠き部、20b…無歯部、21…弧状歯部、22
…溝、23…コイルばね、24…索条体、26…シリンダー、
27…ピストン、31…巻取りばね。The drawing shows an embodiment of the present invention, FIG. 1 is an exploded perspective view,
FIG. 2 is a front view of an essential part, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is an explanatory view of the operation of the essential part, and FIG. 5 is a schematic view for explaining the problem of the invention. . 1 ... Housing, 2 ... Winding shaft, 3 ... Spool, 4 ... Belt, 6 ... Gas generator, 9 ... Tooth portion, 11 ... Casing, 13 ... Recess, 14 ... Groove, 15 ... Opening portion, 16 ... Pipe spring, 17 ... Storage chamber, 18 ... Gear, 19 ... Inner peripheral tooth portion, 20 ... Top, 20a ... Notch portion, 20b ... No tooth portion, 21 ... Arc tooth portion, 22
… Grooves, 23… Coil springs, 24… Cords, 26… Cylinders,
27 ... Piston, 31 ... Winding spring.
Claims (1)
着し、該歯車を接離可能に包囲するとともに、歯部を内
周面に形成した円弧形のコマが配設され、かつ、そのコ
マを包囲して索条体が巻回され、該索条体の一端が再引
締装置と連結されてなる再引締装置付き安全ベルト巻取
装置において、前記コマの内周面略中央部に弧状歯部を
残し、内周面両端部近傍を切り欠いて無歯部を形成した
ことを特徴とする再引締装置付き安全ベルト装置。1. A safety belt device has a winding shaft mounted on one end of a take-up shaft, surrounding the gear so as to be contactable and separable, and having an arc-shaped top having teeth formed on the inner peripheral surface thereof. In a safety belt retractor with a re-tightening device in which a cord body is wound around the top and one end of the cord body is connected to the re-tightening device, A safety belt device with a re-tightening device, characterized in that an arcuate tooth portion is left in the central portion, and both end portions of the inner peripheral surface are cut out to form a toothless portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5874688U JPH076042Y2 (en) | 1988-04-30 | 1988-04-30 | Safety belt device with re-tightening device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5874688U JPH076042Y2 (en) | 1988-04-30 | 1988-04-30 | Safety belt device with re-tightening device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH01161157U JPH01161157U (en) | 1989-11-09 |
JPH076042Y2 true JPH076042Y2 (en) | 1995-02-15 |
Family
ID=31284544
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5874688U Expired - Lifetime JPH076042Y2 (en) | 1988-04-30 | 1988-04-30 | Safety belt device with re-tightening device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH076042Y2 (en) |
-
1988
- 1988-04-30 JP JP5874688U patent/JPH076042Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH01161157U (en) | 1989-11-09 |
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