JPH09256721A - Traveling device of sliding door - Google Patents
Traveling device of sliding doorInfo
- Publication number
- JPH09256721A JPH09256721A JP9014096A JP9014096A JPH09256721A JP H09256721 A JPH09256721 A JP H09256721A JP 9014096 A JP9014096 A JP 9014096A JP 9014096 A JP9014096 A JP 9014096A JP H09256721 A JPH09256721 A JP H09256721A
- Authority
- JP
- Japan
- Prior art keywords
- wheel
- rail
- sliding door
- groove
- door
- 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.)
- Granted
Links
Landscapes
- Support Devices For Sliding Doors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、床面に延設された
レールと、このレールの上を走行する建具などに使用さ
れる引戸の下縁に装着された戸車と、からなる引戸の走
行装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door which comprises a rail extending on the floor and a door roller mounted on a lower edge of a sliding door used for fittings running on the rail. It relates to the device.
【０００２】[0002]
【従来の技術】従来より、間仕切りなどに使用される引
戸の下縁に装着されて、直線上に延設されたレールの凹
溝（畦）に車輪を嵌挿して回転走行する戸車は周知であ
る。そして、引戸の走行の円滑性や安定性、走行感触な
ど、引戸の開閉機能の向上には、戸車の車輪とレールの
凹溝との嵌合い構造が枢要であり、その改良を図った多
様な構成の引戸の走行装置が提案されている。2. Description of the Related Art Conventionally, there is known a door roller which is mounted on a lower edge of a sliding door used for a partition or the like, and which has wheels inserted into a groove (ridge) of a rail extending in a straight line to rotate. is there. In order to improve the sliding door opening and closing functions such as the smoothness and stability of running of sliding doors and the feeling of running, the fitting structure of the door wheels and the groove of the rail is essential. A sliding door traveling device having a configuration has been proposed.
【０００３】例えば、図４は、特開平７−２７９５２９
号公報に開示された従来の引戸の走行装置の要部を示す
もので、この引戸の走行装置は床面２０に直線状に埋め
込み延設されたレール２１と、レール２１の上を回転走
行する車輪２２を備え引戸に固定された戸車２３とから
なるものである。この引戸の走行装置に於いて、車輪２
２の走行を受けるレール２１の受面２４は平面形である
とともにその中央部にはレール２１の長さ方向へ延びる
凹溝２５が設けられている。そして、戸車２３の車輪２
２の踏面２６を円周面形にしてその中央部の周方向に凸
条２７を設け、この凸条２７をガイドとして凹溝２５に
嵌合して走行する構成となっている。For example, FIG. 4 shows Japanese Patent Laid-Open No. 7-279529.
This figure shows a main part of a conventional sliding door traveling device disclosed in Japanese Patent Publication No. JP-A-2003-242242, and this sliding door traveling device rotates and travels on a rail 21 linearly embedded and extended in a floor surface 20 and on the rail 21. The door roller 23 is provided with wheels 22 and fixed to a sliding door. In this sliding door traveling device, the wheels 2
The receiving surface 24 of the rail 21 that receives the two travels has a flat shape, and a recessed groove 25 extending in the longitudinal direction of the rail 21 is provided in the center thereof. Then, the wheels 2 of the door roller 23
The second tread 26 is formed into a circumferential surface, and a ridge 27 is provided in the circumferential direction of the central portion of the tread 26, and the ridge 27 is used as a guide to fit into the groove 25 to run.
【０００４】この従来の引戸の走行装置は、レール２１
の凹溝２５と戸車２３の車輪２２の凸条２７との嵌合代
を深くできるので、走行中に車輪２２がレール２１から
簡単に外れることを防止できるとともに、引戸の重量を
支承するレール２１の受面２４が平面形で、このレール
２１の受面２４に対応する戸車２３の車輪２２の踏面２
６が円周面形であるので、レール２１の受面２４の上で
の車輪２２の姿勢が安定すると言うものである。This conventional sliding door traveling device is provided with a rail 21.
Since the fitting allowance between the concave groove 25 of the door 22 and the ridge 27 of the wheel 22 of the door roller 23 can be deepened, it is possible to prevent the wheel 22 from easily coming off the rail 21 during traveling and to support the weight of the sliding door. The receiving surface 24 of the door 21 is flat and the tread 2 of the wheel 22 of the door roller 23 corresponding to the receiving surface 24 of the rail 21.
Since 6 is a circumferential surface type, the posture of the wheel 22 on the receiving surface 24 of the rail 21 is stable.
【０００５】[0005]
【発明が解決しようとする課題】ところで、上記従来の
引戸の走行装置では、車輪２２の円周面形の踏面２６か
ら突出した凸条２７がレール２１の凹溝２５に嵌合し、
凹溝２５によってガイドされて走行する構成であるの
で、車輪２２が円滑に回転するために、凹溝２５の内壁
２５ａ，２５ａと凸条２７の両側壁２７ａ，２７ａとの
間には車輪２２の回転運動を許容する僅かな間隙が設け
られている。By the way, in the above-mentioned conventional sliding door traveling device, the convex strip 27 protruding from the circumferential tread surface 26 of the wheel 22 is fitted into the concave groove 25 of the rail 21,
Since the wheel 22 is configured to travel while being guided by the groove 25, the wheel 22 smoothly rotates, so that the wheel 22 is provided between the inner walls 25a, 25a of the groove 25 and the side walls 27a, 27a of the ridge 27. There is a slight gap to allow rotational movement.
【０００６】従って、戸車２３を走行させると、この間
隙でレールの凹溝２５の内壁２５ａ，２５ａと車輪２２
の凸条２７の両側壁２７ａ，２７ａとは走行中に不規則
に間断する摺接を繰り返す。従って、凹溝２５の内壁２
５ａ，２５ａと車輪２２の凸条２７の側壁２７ａとの間
でがたつきが発生し、レール上で走行する車輪２２の走
行方向と直交する水平方向の小さな振れ動き（横振れ）
を許容している。[0006] Therefore, when the door roller 23 is run, the inner walls 25a, 25a of the groove 25 of the rail and the wheels 22 are made in this gap.
The sliding contact with the side walls 27a, 27a of the convex strip 27 is irregularly interrupted during traveling. Therefore, the inner wall 2 of the groove 25
A rattling occurs between 5a, 25a and the side wall 27a of the ridge 27 of the wheel 22, and a small horizontal shake (horizontal shake) perpendicular to the traveling direction of the wheel 22 traveling on the rail.
Is allowed.
【０００７】また、引戸２３の重量や鉛直方向の衝撃な
どによる加重は、車輪２２の凸条２７の両サイドの踏面
２６を介してレール２１の平面形の受面２４が集中して
受けるが、戸車２３に加わる水平方向の衝撃や走行のが
たつきによる応力は、レール２１の凹溝２５の垂直な内
壁２５ａ，２５ａと、これと摺接する車輪２２の凸条２
７の両側壁２７ａ，２７ａとに集中して軋みを生むとと
もに、戸車２３を傷め易く、その耐久性を損なう問題が
あった。Further, the weight of the sliding door 23 and the load due to the impact in the vertical direction are concentrated on the flat receiving surfaces 24 of the rails 21 through the treads 26 on both sides of the ridge 27 of the wheel 22, The horizontal impact applied to the door roller 23 and the stress due to the rattling of the running are caused by the vertical inner walls 25a, 25a of the recessed groove 25 of the rail 21 and the ridge 2 of the wheel 22 slidingly contacting the inner walls 25a.
7 has a problem that it concentrates on both side walls 27a, 27a, causes squeaking, and easily damages the door roller 23, impairing its durability.
【０００８】更に、レール２１の凹溝２５は深いＵ字形
の長溝であるので、凹溝２５の内部に堆積した塵埃の取
り除きが面倒であり、不衛生になりがちである。Further, since the concave groove 25 of the rail 21 is a deep U-shaped long groove, it is troublesome to remove the dust accumulated inside the concave groove 25, which tends to be unsanitary.
【０００９】本発明は、上記の問題に鑑みてなされたも
ので、走行する戸車の横振れを無くすことにより軋みを
なくし、レールから離脱しにくい耐久性のある引戸の走
行装置にすることを課題としている。The present invention has been made in view of the above problems, and it is an object of the present invention to provide a sliding door traveling device that is durable and does not easily disengage from a rail by eliminating lateral vibration of a traveling door roller. I am trying.
【００１０】[0010]
【課題を解決するための手段】そこで、本発明の引戸の
走行装置は、床面に延設された凹溝を有するレールと、
前記凹溝に車輪を嵌挿して走行する引戸の下縁に装着さ
れる戸車とからなる引戸の走行装置において、前記車輪
の踏面を前記車輪の外周縁中央部の稜線を挟んで内向き
の湾曲面に形成するとともに、前記レールの凹溝の内壁
を前記踏面を受ける外向きの湾曲面としたことで前記課
題の解決手段とした。In view of the above, a sliding door traveling apparatus according to the present invention comprises a rail having a groove extending in the floor surface,
In a traveling device for a sliding door, which comprises a door roller attached to a lower edge of a sliding door that is inserted and travels by inserting a wheel in the groove, an inward curve of a tread surface of the wheel with a ridge line at a central portion of an outer peripheral edge of the wheel being interposed In addition to forming the surface, the inner wall of the groove of the rail is an outwardly curved surface that receives the tread surface, which is a means for solving the above problems.
【００１１】また、前記凹溝の湾曲面を前記踏面と同曲
率で形成することにより凹溝と踏面の接触面を大きくす
ることが望ましい。Further, it is desirable that the contact surface between the concave groove and the tread is enlarged by forming the curved surface of the concave groove with the same curvature as that of the tread.
【００１２】[0012]
【発明の実施の形態】以下、本発明の好ましい実施の形
態を添付図面を参照しながら詳細に説明する。Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
【００１３】図１乃至図３は、本発明の引戸の走行装置
の実施の形態を示すもので、床面２に延設されたレール
３と、引戸６の下縁に装着され、前記レール３の凹溝４
に車輪５を嵌挿して回転走行する戸車１とから構成され
ている。FIGS. 1 to 3 show an embodiment of a sliding door traveling device according to the present invention. The rail 3 extends on the floor 2 and the lower edge of the sliding door 6 is mounted on the rail 3. Groove 4
It is composed of a door roller 1 which is fitted with wheels 5 and is rotated.
【００１４】引戸６は、かまちや枠に囲まれ、木板やア
ルミ板、ガラス板などが取り付けられて構成された間仕
切りなどに使用される戸板であり、その下縁７の前後端
部に下面から車輪５の下方を突出した戸車１が埋設され
ている。The sliding door 6 is a door plate which is surrounded by a stile or a frame and is formed by attaching a wooden plate, an aluminum plate, a glass plate or the like, and is used as a partition. A door roller 1 that projects below the wheel 5 is embedded.
【００１５】戸車１は、外ケース８ａに内ケース８ｂが
組み込まれ下端面が車輪５が出るように解放された金属
製のケース８と、このケース８に収納される車輪５とか
ら構成され、前記車輪５の車軸９は外ケース８ａの下方
向に切り込まれた溝と前記内ケース８ｂに斜め方向に切
り込まれた溝１１との交差位置に軸止されている。尚、
戸車１は、図示の形態に限るものではなく、例えば、車
輪５の位置を上下左右に調整できる周知の調整機構付き
タイプのものでもよい（図示省略）。The door roller 1 is composed of a metal case 8 in which an inner case 8b is incorporated in an outer case 8a and a lower end surface of which is opened so that the wheels 5 can come out, and wheels 5 housed in the case 8. The axle 9 of the wheel 5 is fixed at a position where a groove cut downward in the outer case 8a and a groove 11 cut obliquely in the inner case 8b intersect each other. still,
The door roller 1 is not limited to the illustrated form, but may be of a well-known type with an adjusting mechanism that can adjust the position of the wheel 5 vertically and horizontally (not shown).
【００１６】車輪５は、ポリアミド、ポリアセタールな
ど剛性と摩耗性に優れ、且つ走行感触のよいエンジニア
リング合成樹脂を使用して円盤状に形成されている。車
輪５の両壁の中央部には金属製の車軸９が突設され、こ
の車軸９の基端部は車輪５の壁面より突出した円台形の
スラスト受け１２となっている。また、車輪５が引戸６
の加重を受けてレール３に接する踏面１３は、車輪５の
外周縁中央部の稜線１４を挟んで内向きの湾曲面に形成
されており、レール３の凹溝４に嵌挿されて凹溝４の内
壁１５，１５に圧接している。また、車輪５の稜線１４
は車輪５の剛性を充分担保できる幅を有している。The wheel 5 is formed in a disk shape using an engineering synthetic resin such as polyamide and polyacetal which has excellent rigidity and wear resistance and has a good running feel. A metal axle 9 is projectingly provided at the center of both walls of the wheel 5, and the base end of the axle 9 is a circular trapezoidal thrust receiver 12 protruding from the wall of the wheel 5. In addition, the wheel 5 is a sliding door 6
The tread surface 13 that is in contact with the rail 3 under the load of is formed in an inwardly curved surface with the ridge line 14 at the center of the outer peripheral edge of the wheel 5 sandwiched between the tread surface 13 and the tread surface 13. It is pressed against the inner walls 15, 15. In addition, the ridge line 14 of the wheel 5
Has a width sufficient to ensure the rigidity of the wheel 5.
【００１７】レール３は、アルミニウムやステンレスな
ど金属材料を用いて形成され、床面２にほぼ面一に埋め
込まれて直線状に延設されており、その上面には車輪５
の踏面１３が嵌挿される凹溝４がレール３の長さ方向に
開口して形成されている。この凹溝４の対向する内壁１
５，１５は、上述した車輪５の湾曲した踏面１３にぴっ
たり接して対応するように、凹溝４の軸線を挟んで対向
する外向きの踏面１５と同曲率の湾曲面に形成され、踏
面１３の受面となっている。The rail 3 is made of a metal material such as aluminum or stainless steel, is embedded in the floor surface 2 substantially in the same plane, and extends linearly.
The recessed groove 4 into which the tread surface 13 is inserted is formed so as to open in the length direction of the rail 3. Inner walls 1 of the groove 4 facing each other
Reference numerals 5 and 15 are formed on the curved surface having the same curvature as the outward facing tread surface 15 with the axis of the recessed groove 4 interposed therebetween so as to correspond to the curved tread surface 13 of the wheel 5 described above. It is the receiving surface of.
【００１８】尚、車輪５の踏面１３とレール３の凹溝４
の湾曲面の断面形状は、図２に示した形に限定するもの
ではなく、要は車輪５のレール３への接触面が平面部と
角部とで縦方向と横方向とに二分されることなく、湾曲
した踏面１３が凹溝４から抜け外れのない充分な深さの
嵌合代を確保できる湾曲面であればよい。従って、車輪
１５の踏面１３と凹溝４の受面の湾曲率は、引戸の重さ
や車輪の大きさなどを勘案して決めることができる。Incidentally, the tread surface 13 of the wheel 5 and the concave groove 4 of the rail 3
The cross-sectional shape of the curved surface is not limited to the shape shown in FIG. 2, and the point is that the contact surface of the wheel 5 with the rail 3 is divided into a plane portion and a corner portion into a vertical direction and a horizontal direction. Instead, the curved tread 13 may be a curved surface that can secure a fitting margin with a sufficient depth so that the curved tread 13 does not come off from the groove 4. Therefore, the curvature rates of the tread surface 13 of the wheel 15 and the receiving surface of the concave groove 4 can be determined in consideration of the weight of the sliding door, the size of the wheel, and the like.
【００１９】以上のように構成された本実施の形態の引
戸の走行装置は、車輪５の踏面１３を稜線１４を挟んで
内向きの湾曲面に形成し、レール３の凹溝４も挿入され
た車輪５の踏面１３を受ける同曲率に湾曲した受面１５
となっているので、車輪５の踏面１３とレール３の凹溝
４の受面とには間隙がなく、従って、走行する車輪５に
振れ動きが発生せず軋みのない円滑な走行ができる。ま
た、接触面が湾曲して大きく面接しているので、引戸６
の建てつけの安定がよい。In the sliding door traveling apparatus of the present embodiment configured as described above, the tread surface 13 of the wheel 5 is formed into an inwardly curved surface with the ridge line 14 interposed therebetween, and the concave groove 4 of the rail 3 is also inserted. The receiving surface 15 that has the same curvature and receives the tread surface 13 of the wheel 5
Therefore, there is no gap between the tread surface 13 of the wheel 5 and the receiving surface of the recessed groove 4 of the rail 3, and therefore, the running wheel 5 does not generate a wobbling motion, and smooth running can be performed without squeaking. Further, since the contact surface is curved and is in large contact, the sliding door 6
The building is stable.
【００２０】また、引戸６を介して車輪５に加わる外力
による水平方向の衝撃は、その力を車輪５の内向きに湾
曲した踏面１３全体で分散して受けるので、従来の引戸
の走行装置に比較して車輪５の傷みが緩和され、戸車１
の耐久性が向上する。Further, since a horizontal impact due to an external force applied to the wheel 5 through the sliding door 6 is dispersed and received by the entire inwardly curved tread surface 13 of the wheel 5, the conventional sliding door traveling device can be used. Compared with this, the damage of the wheel 5 is alleviated, and the door roller 1
Durability is improved.
【００２１】また、車輪５の踏面１３は、戸車１のガイ
ドでもあり、踏面１３を凹溝４に深く嵌挿する組み合わ
せにすることが可能であるので、走行中に戸車１がレー
ル３から離脱することがない。The tread surface 13 of the wheel 5 is also a guide for the door roller 1. Since the tread surface 13 can be deeply inserted into the groove 4, the door roller 1 can be separated from the rail 3 during running. There is nothing to do.
【００２２】更に、レール３の凹溝４の中は湾曲面で構
成されているので、溜まった塵埃なども細棒などを使っ
て簡単に掻き出すことが可能である。Further, since the concave groove 4 of the rail 3 is formed of a curved surface, it is possible to easily scrape off the accumulated dust and the like by using a thin rod or the like.
【００２３】[0023]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is embodied in the form described above and has the following effects.
【００２４】車輪の踏面とレールの凹溝の受面との少な
くともその一部をぴったり面接する同曲率の湾曲面とし
たので、走行する車輪とレールとの接触面に間隙が生じ
ることがなく、従って、走行する車輪に横振れが発生し
ないので、軋みのない円滑な走行が可能となり、引戸の
上質な開閉感触を得ることができる。しかも車輪とレー
ルとの接触面積が大きいので、引戸の建てつけの安定が
よい。Since at least a part of the tread surface of the wheel and the receiving surface of the groove of the rail are curved surfaces having the same curvature, the contact surface between the traveling wheel and the rail does not have a gap. Therefore, since the running wheels do not shake laterally, smooth running without squeezing is possible, and a high-quality opening and closing feeling of the sliding door can be obtained. Moreover, since the contact area between the wheel and the rail is large, the sliding door can be stably installed.
【００２５】また、車輪の踏面を内向きの湾曲面とした
ことにより、引戸を介して車輪に加わる縦方向の衝撃と
共に水平方向の衝撃も、その応力を車輪の踏面の湾曲面
で分散するので、従来の引戸の走行装置に比較して車輪
の傷みによるがたつきの発生が遅延され、戸車の耐久性
が向上する。Further, since the tread surface of the wheel is an inwardly curved surface, the stress is dispersed in the curved surface of the tread surface of the wheel both in the vertical impact and the horizontal impact applied to the wheel through the sliding door. As compared with the conventional sliding door traveling device, rattling due to wheel damage is delayed, and durability of the door roller is improved.
【００２６】更に、車輪の踏面とレールの溝との接触面
の湾曲率や嵌挿深度は自由に設定できる構造であるの
で、戸車のガイド機能が充分得られる設定にすることに
より、走行中の所謂脱線現象を充分防止することができ
る。Further, since the curvature rate and the insertion depth of the contact surface between the tread surface of the wheel and the groove of the rail can be freely set, the guide function of the door roller can be set to a sufficient degree to ensure that the vehicle is running. The so-called derailment phenomenon can be sufficiently prevented.
【００２７】また、レールの凹溝内に堆積した塵埃は簡
単に掻き出すことが出来るので、掃除がし易く、車輪の
走行が妨げられたり、不衛生になることが防止できる。Further, since the dust accumulated in the groove of the rail can be easily scraped out, it is easy to clean, and it is possible to prevent the traveling of the wheels and prevent unsanitary conditions.
【図１】本発明の実施の態様の要部を示す斜視図。FIG. 1 is a perspective view showing a main part of an embodiment of the present invention.
【図２】本発明の実施の態様を示す断面図。FIG. 2 is a sectional view showing an embodiment of the present invention.
【図３】本発明の実施の態様を示す側面図。FIG. 3 is a side view showing an embodiment of the present invention.
【図４】従来例の要部を示す断面図。FIG. 4 is a sectional view showing a main part of a conventional example.
１ 戸車，２ 床面，３ レール，４ 凹溝，５ 車
輪，６ 引戸，７ 下縁，１３ 踏面，１４ 稜線，１
５ 内壁，1 door roller, 2 floor surface, 3 rail, 4 concave groove, 5 wheel, 6 sliding door, 7 lower edge, 13 tread surface, 14 ridge line, 1
5 inner wall,
Claims (2)
と、前記凹溝に車輪を嵌挿して走行する引戸の下縁に装
着される戸車とからなる引戸の走行装置において、前記
車輪の踏面を前記車輪の外周縁中央部の稜線を挟んで内
向きの湾曲面に形成するとともに、前記レールの凹溝の
内壁を前記踏面を受ける外向きの湾曲面としたことを特
徴とする引戸の走行装置。1. A running device for a sliding door, comprising: a rail having a recessed groove extending on a floor surface; and a door roller attached to a lower edge of a sliding door where a wheel is inserted in the recessed groove to travel, wherein the wheel is a wheel. The tread surface is formed as an inward curved surface across the ridgeline of the outer peripheral center of the wheel, and the inner wall of the groove of the rail is an outward curved surface that receives the tread surface. Traveling device.
形成したことを特徴とする請求項１記載の引戸の走行装
置。2. The sliding door traveling device according to claim 1, wherein the curved surface of the groove is formed with the same curvature as the tread surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09014096A JP3655389B2 (en) | 1996-03-19 | 1996-03-19 | Sliding door travel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP09014096A JP3655389B2 (en) | 1996-03-19 | 1996-03-19 | Sliding door travel device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09256721A true JPH09256721A (en) | 1997-09-30 |
| JP3655389B2 JP3655389B2 (en) | 2005-06-02 |
Family
ID=13990216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP09014096A Expired - Fee Related JP3655389B2 (en) | 1996-03-19 | 1996-03-19 | Sliding door travel device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3655389B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100977866B1 (en) * | 2008-03-14 | 2010-08-24 | 전남대학교산학협력단 | sliding door of round rail |
| JP2015068129A (en) * | 2013-09-30 | 2015-04-13 | パナソニック株式会社 | Lower rail |
| CN106050024A (en) * | 2016-07-11 | 2016-10-26 | 黄受显 | Door opener with functions of door shield |
-
1996
- 1996-03-19 JP JP09014096A patent/JP3655389B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100977866B1 (en) * | 2008-03-14 | 2010-08-24 | 전남대학교산학협력단 | sliding door of round rail |
| JP2015068129A (en) * | 2013-09-30 | 2015-04-13 | パナソニック株式会社 | Lower rail |
| CN106050024A (en) * | 2016-07-11 | 2016-10-26 | 黄受显 | Door opener with functions of door shield |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3655389B2 (en) | 2005-06-02 |
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