JP6787747B2

JP6787747B2 - Roll screen

Info

Publication number: JP6787747B2
Application number: JP2016206806A
Authority: JP
Inventors: 智徳武藤
Original assignee: トーソー株式会社
Priority date: 2016-10-21
Filing date: 2016-10-21
Publication date: 2020-11-18
Anticipated expiration: 2036-10-21
Also published as: JP2018066234A

Description

本発明は、第１及び第２巻取パイプに内蔵された第１及び第２巻取ばねに蓄えられた付勢力によって第１及び第２遮蔽体を巻取り可能であって、第１及び第２遮蔽体を単一の操作チェーンにより昇降させるロールスクリーンに関するものである。 According to the present invention, the first and second shields can be wound by the urging force stored in the first and second winding springs built in the first and second winding pipes, and the first and second shields can be wound. 2 It relates to a roll screen that raises and lowers a shield by a single operation chain.

従来、スクリーンを吊下支持する第１及び第２巻取パイプを支持ブラケットと操作装置で並列にかつ回転可能に支持し、操作装置から垂下される１本の無端状の操作チェーンを操作することにより、第１及び第２巻取パイプから吊下支持される第１及び第２スクリーンを昇降する連装型ロールブラインドのスクリーン昇降装置が開示されている（例えば、特許文献１参照。）。この連装型ロールブラインドのスクリーン昇降装置では、操作装置に、操作チェーンの一方への操作により第１巻取パイプを第１スクリーンの繰出し方向へ回転させる回転力と、操作チェーンの他方への操作により第２巻取パイプを第２スクリーンの繰出し方向へ回転させる回転力とを生成する制御装置が設けられる。また、第１及び第２巻取パイプ内に、巻取パイプにスクリーンの巻取り方向の回転力を付与する付勢手段と、巻取パイプの回転の許容及び阻止等を切換える第１及び第２クラッチ装置とが設けられる。第１クラッチ装置は、巻取パイプをスクリーンの繰出し方向に回転させた後は、付勢手段によるスクリーンの巻取りを阻止し、スクリーンの巻取りを阻止している状態から、巻取パイプをスクリーンの繰出し方向に所定角度の範囲で回転させた後は、巻取パイプがスクリーンの巻取り方向に回転するのを許容するように構成される。また、第２クラッチ装置は、制御装置で生成された回転力を巻取パイプに伝達し、付勢手段による巻取パイプの回転を制御装置に伝達しないように構成される。 Conventionally, the first and second take-up pipes that suspend and support the screen are supported in parallel and rotatably by the support bracket and the operating device, and one endless operation chain hanging from the operating device is operated. Discloses a screen elevating device for a series of roll blinds that elevates and elevates the first and second screens suspended and supported from the first and second winding pipes (see, for example, Patent Document 1). In this continuous roll blind screen elevating device, the operating device is provided with a rotational force that rotates the first take-up pipe in the feeding direction of the first screen by operating one of the operating chains, and by operating the other of the operating chains. A control device is provided that generates a rotational force that rotates the second take-up pipe in the feeding direction of the second screen. Further, in the first and second take-up pipes, the first and second urging means for applying the rotational force in the take-up direction of the screen to the take-up pipe and the first and second takeovers to allow or prevent the rotation of the take-up pipe. A clutch device is provided. After rotating the take-up pipe in the feeding direction of the screen, the first clutch device prevents the screen from being taken up by the urging means, and from the state where the take-up of the screen is prevented, the take-up pipe is screened. After being rotated in the feeding direction of the screen within a predetermined angle range, the take-up pipe is configured to allow rotation in the winding direction of the screen. Further, the second clutch device is configured to transmit the rotational force generated by the control device to the take-up pipe and not to transmit the rotation of the take-up pipe by the urging means to the control device.

また、操作チェーンが巻き掛けられるプーリを操作装置のケース下部に第２巻取パイプと同軸上に配置してそのプーリの回転に基づいて第２巻取パイプを回転駆動し、そのプーリの回転を歯車及び第１伝達歯車を介して第２伝達歯車に伝達し、その第２伝達歯車の回転に基づいて第１巻取パイプを回転駆動するように構成される。更に、窓の上方壁面等の取付面に複数の取付ブラケットを介して支持枠が固定され、この支持枠の一端に支持ブラケットが取付けられ、支持枠の他端に支持ブラケットを兼ねる操作装置が取付けられる。そして、支持ブラケットと操作装置との間に２本の第１及び第２巻取パイプが回転可能に支持され、第１及び第２巻取パイプからそれぞれスクリーンが吊下支持される。 Further, a pulley around which the operation chain is wound is arranged coaxially with the second take-up pipe at the lower part of the case of the operation device, and the second take-up pipe is rotationally driven based on the rotation of the pulley to rotate the pulley. It is configured to transmit to the second transmission gear via the gear and the first transmission gear, and to rotationally drive the first take-up pipe based on the rotation of the second transmission gear. Further, a support frame is fixed to a mounting surface such as an upper wall surface of a window via a plurality of mounting brackets, a support bracket is attached to one end of the support frame, and an operating device that also serves as a support bracket is attached to the other end of the support frame. Be done. Then, two first and second take-up pipes are rotatably supported between the support bracket and the operating device, and the screen is suspended and supported from the first and second take-up pipes, respectively.

このように構成された連装型ロールブラインドのスクリーン昇降装置では、１本の操作チェーンにより２本の巻取パイプでそれぞれスクリーンの繰出し操作及び巻取り操作を可能としながら、スクリーンの巻取り操作を容易に行うことができる。また、プーリと一体的に設けられた歯車（プーリの歯車）と比べてプーリを小型化することなく、第１及び第２伝達歯車の径を縮小して、第１及び第２巻取パイプの間隔を縮小できるので、プーリを回転駆動するための操作力を増大させることなく、操作装置のケースを小型化できる。 In the screen elevating device of the continuous roll blind configured in this way, the screen winding operation is easy while the screen can be unwound and wound by two winding pipes by one operation chain. Can be done. Further, the diameters of the first and second transmission gears can be reduced without making the pulley smaller than the gear (pulley gear) provided integrally with the pulley, and the first and second take-up pipes can be used. Since the interval can be reduced, the case of the operating device can be miniaturized without increasing the operating force for rotationally driving the pulley.

特許第３２８２９８１号公報（請求項１、段落［００６６］、［００６７］、図１〜図４）Japanese Patent No. 3282981 (Claim 1, paragraphs [0066], [0067], FIGS. 1 to 4)

しかし、上記従来の特許文献１に示された連装型ロールブラインドのスクリーン昇降装置では、支持ブラケットと操作装置との間に２本の第１及び第２巻取パイプが回転可能に支持された状態で、操作装置を右側から左側に反転させて取付けようとすると、巻取パイプが取付ブラケットに干渉してしまうため、上記状態で支持枠を取付ブラケットに取付けることができず、左右対称なケース等を２種類用意しなければならない不具合があった。また、上記従来の特許文献１に示された連装型ロールブラインドのスクリーン昇降装置では、操作チェーンが巻き掛けられるプーリが操作装置のケース下部に第２巻取パイプと同軸上に配置されているため、操作チェーンの一方を引下げると、この操作力が第１巻取パイプに直接伝達されるのに対し、操作チェーンの他方を引下げると、この操作力がプーリの歯車、第１伝達歯車及び第２伝達歯車を介して第２巻取パイプに伝達されるため、第１巻取パイプを回転させるための操作力と、第２巻取パイプを回転させるための操作力とが微妙に異なり、操作チェーンの操作性に違和感が生じる問題点もあった。 However, in the conventional roll blind screen elevating device shown in Patent Document 1, two first and second take-up pipes are rotatably supported between the support bracket and the operating device. If you try to mount the operating device by reversing it from the right side to the left side, the take-up pipe will interfere with the mounting bracket, so the support frame cannot be mounted on the mounting bracket in the above state, and the case is symmetrical. There was a problem that two types had to be prepared. Further, in the screen elevating device of the twin roll blind shown in the conventional patent document 1, the pulley around which the operation chain is wound is arranged coaxially with the second take-up pipe at the lower part of the case of the operation device. When one of the operating chains is pulled down, this operating force is directly transmitted to the first take-up pipe, whereas when the other of the operating chains is pulled down, this operating force is transmitted to the pulley gear, the first transmission gear and Since it is transmitted to the second take-up pipe via the second transmission gear, the operating force for rotating the first take-up pipe and the operating force for rotating the second take-up pipe are slightly different. There was also a problem that the operability of the operation chain became uncomfortable.

本発明の第１の目的は、ロールスクリーンの設置場所における操作性により、プーリ及び歯車ユニットを第１及び第２巻取パイプの右側に位置させても或いは左側に位置させても、１種類のプーリ及び歯車ユニットを用意するだけで済み、部品点数を低減できる、ロールスクリーンを提供することにある。本発明の第２の目的は、第１巻取パイプを回転させるための操作力と、第２巻取パイプを回転させるための操作力とが同一になり、操作チェーンの操作性に違和感が生じない、ロールスクリーンを提供することにある。本発明の第３の目的は、操作チェーンの操作性に僅かな影響を与えるだけで、プーリカバーの強度を確保できる、ロールスクリーンを提供することにある。本発明の第４の目的は、操作チェーンが軟質筒状体に当接することにより、異音の発生を防止できる、ロールスクリーンを提供することにある。本発明の第５の目的は、操作チェーンの操作性に殆ど影響を与えることなく、プーリカバーの強度を確保できる、ロールスクリーンを提供することにある。 A first object of the present invention is one type of pulley and gear unit, whether it is located on the right side or the left side of the first and second take-up pipes, depending on the operability at the installation location of the roll screen. It is an object of the present invention to provide a roll screen which can reduce the number of parts by simply preparing a pulley and a gear unit. A second object of the present invention is that the operating force for rotating the first take-up pipe and the operating force for rotating the second take-up pipe become the same, causing a sense of discomfort in the operability of the operation chain. Not to provide a roll screen. A third object of the present invention is to provide a roll screen capable of ensuring the strength of the pulley cover with only a slight influence on the operability of the operation chain. A fourth object of the present invention is to provide a roll screen capable of preventing the generation of abnormal noise when the operation chain comes into contact with the soft tubular body. A fifth object of the present invention is to provide a roll screen capable of ensuring the strength of the pulley cover with almost no effect on the operability of the operation chain.

本発明の第１の観点は、図１〜図３及び図５に示すように、壁１５、窓枠又は天井に複数のブラケット１３を介して取付けられかつ両端に一対の支持部材１６，１７が取付けられた単一の支持バー１４と、一対の支持部材１６，１７に上下に間隔をあけて回転可能に取付けられた第１及び第２巻取パイプ１１，１２と、第１及び第２巻取パイプ１１，１２に上縁がそれぞれ固定され第１及び第２巻取パイプ１１，１２に繰出し可能に巻取られる第１及び第２遮蔽体２１，２２と、第１及び第２巻取パイプ１１，１２にそれぞれ内蔵され第１及び第２遮蔽体２１，２２を第１及び第２巻取パイプ１１，１２に巻取る方向に第１及び第２巻取パイプ１１，１２を回転させるための付勢力が蓄えられた第１及び第２巻取ばね３１，３２と、第１及び第２巻取パイプ１１，１２をそれぞれ正転又は逆転させて第１及び第２遮蔽体２１，２２を繰出し又は巻取るために操作される単一の操作チェーン１８と、操作チェーン１８と第１及び第２巻取パイプ１１，１２との間にそれぞれ設けられ操作チェーン１８の一方又は他方への引下げ操作時にこの操作力を第１又は第２巻取パイプ１１，１２に伝達しかつ操作チェーン１８の他方又は一方への引下げ操作時にこの操作力を第２又は第１巻取パイプ１２，１１に伝達しないクラッチ機能を有する第１及び第２回転伝達切換装置４１，４２と、操作チェーン１８が巻き掛けられる単一のプーリ１９と、プーリ１９と第１及び第２回転伝達切換装置４１，４２との間に設けられ操作チェーン１８の操作力をプーリ１９から第１及び第２回転伝達切換装置４１，４２に伝達する歯車列２３とを備えたロールスクリーン１０において、第１巻取パイプ１１が第２巻取パイプ１２に対して室内側又は窓側にオフセットして設けられ、プーリ１９が第１巻取パイプ１１と第２巻取パイプ１２の間に位置するように構成され、歯車列２３が収容された歯車ケース２４とこの歯車ケース２４に取付けられ操作チェーン１８の上部及びプーリ１９を収容しかつ下面及び下部側面が開口したプーリカバー２６とによりプーリ及び歯車ユニット２７が構成され、ブラケット１３に、室内側から窓側の方向に所定の間隔をあけて一対の被係止部１３ｃ，１３ｄが形成され、支持バー１４に、一対の被係止部１３ｃ，１３ｄに係止可能な一対の係止部１４ｃ，１４ｄがそれぞれ形成され、一対の係止部１４ｃ，１４ｄから等距離にある中点を通りかつ壁１５に平行な鉛直面を面Ｘとし、第１巻取パイプ１１の軸線を含む鉛直面と第２巻取パイプ１２の軸線を含む鉛直面との間に両鉛直面から等距離に位置する鉛直面を面Ｙとするとき、面Ｘと面Ｙが一致するように構成され、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側又は左側のいずれかに一方に位置した状態で支持バー１４が複数のブラケット１３に取付け可能に構成されたことを特徴とする。
The first aspect of the present invention is that, as shown in FIGS. 1 to 3 and 5, a pair of support members 16 and 17 are attached to a wall 15, a window frame or a ceiling via a plurality of brackets 13 and at both ends. A single support bar 14 mounted, first and second take-up pipes 11 and 12 rotatably mounted vertically spaced apart from a pair of support members 16 and 17, and first and second windings. The first and second shields 21 and 22 and the first and second take-up pipes, whose upper edges are fixed to the take-up pipes 11 and 12, and which are wound up to the first and second take-up pipes 11 and 12, respectively. For rotating the first and second take-up pipes 11 and 12 in the direction in which the first and second shields 21 and 22 are wound around the first and second take-up pipes 11 and 12, respectively. The first and second take-up springs 31 and 32 in which the urging force is stored and the first and second take-up pipes 11 and 12 are rotated forward or reverse, respectively, to feed out the first and second shields 21 and 22. Alternatively, when a single operating chain 18 operated for winding is provided between the operating chain 18 and the first and second winding pipes 11 and 12, respectively, and the operating chain 18 is pulled down to one or the other. A clutch that transmits this operating force to the first or second take-up pipes 11 and 12 and does not transmit this operating force to the second or first take-up pipes 12 and 11 during the pulling operation of the operation chain 18 to the other or one side. Between the first and second rotation transmission switching devices 41 and 42 having a function, a single pulley 19 on which the operation chain 18 is wound, and between the pulley 19 and the first and second rotation transmission switching devices 41 and 42. In the roll screen 10 provided with the gear train 23 that transmits the operating force of the operating chain 18 from the pulley 19 to the first and second rotation transmission switching devices 41 and 42, the first winding pipe 11 takes the second winding. A gear that is provided offset to the indoor side or the window side with respect to the pipe 12, has a pulley 19 configured to be located between the first take-up pipe 11 and the second take-up pipe 12, and accommodates a gear train 23. attached to the case 24 to the gear case 24 houses the upper and pulley 19 of the operating chain 18 and the lower surface and the lower side is a pulley and gear unit 27 is composed of a pulley cover 26 which is open, the bracket 13, the indoor side A pair of locked portions 13c and 13d are formed at predetermined intervals in the direction toward the window, and a pair of locking portions 14c and 14d that can be locked to the pair of locked portions 13c and 13d on the support bar 14 Are formed, respectively, and a pair of locking portions 14c, 14 The vertical surface that passes through the midpoint equidistant from d and is parallel to the wall 15 is defined as the surface X, and the vertical surface including the axis of the first winding pipe 11 and the vertical surface including the axis of the second winding pipe 12 When the vertical surface located equidistant from both vertical surfaces is defined as the surface Y, the surface X and the surface Y are configured to coincide with each other, and the pulley and the gear unit 27 are the first and second take-up pipes 11 and 12. The support bar 14 is configured to be attachable to a plurality of brackets 13 while being located on either the right side or the left side of the above.

本発明の第２の観点は、第１の観点に基づく発明であって、更に図１、図２及び図５に示すように、歯車ケース２４の下端外面からプーリカバー２６の下端内面に向って補強用ボス２４ａが突設され、プーリカバー２６に通孔２６ａが補強用ボス２４ａに対向して形成され、通孔２６ａにビス２８を挿通して補強用ボス２４ａに螺合することによりプーリカバー２６の下端が歯車ケース２４に固定されたことを特徴とする。 The second aspect of the present invention is the invention based on the first aspect, and further, as shown in FIGS. 1, 2 and 5, from the outer surface of the lower end of the gear case 24 toward the inner surface of the lower end of the pulley cover 26. A reinforcing boss 24a is projected, a through hole 26a is formed in the pulley cover 26 so as to face the reinforcing boss 24a, and a screw 28 is inserted through the through hole 26a and screwed into the reinforcing boss 24a to screw the pulley cover. The lower end of the 26 is fixed to the gear case 24.

本発明の第３の観点は、第２の観点に基づく発明であって、更に図１、図２及び図５に示すように、補強用ボス２４ａに軟質樹脂又は軟質ゴムにより形成された軟質筒状体２９が嵌入されたことを特徴とする。 The third aspect of the present invention is the invention based on the second aspect, and as shown in FIGS. 1, 2 and 5, a soft cylinder formed of a soft resin or a soft rubber on the reinforcing boss 24a. It is characterized in that the body 29 is fitted.

本発明の第４の観点は、第２又は第３の観点に基づく発明であって、更に図２に示すように、プーリ１９に巻き掛けられてプーリ１９から垂下された操作チェーン１８の室内側の操作部及び窓側の操作部が補強用ボス２４ａより窓側に位置するとき、操作チェーン１８の室内側の操作部が補強用ボス２４ａより室内側に位置するように配索されたことを特徴とする。 The fourth aspect of the present invention is the invention based on the second or third aspect, and as shown in FIG. 2, the indoor side of the operation chain 18 wound around the pulley 19 and hung from the pulley 19. When the operation unit and the operation unit on the window side of the above are located on the window side of the reinforcing boss 24a, the operation unit on the indoor side of the operation chain 18 is arranged so as to be located on the indoor side of the reinforcing boss 24a. To do.

本発明の第１の観点のロールスクリーンでは、第１巻取パイプを第２巻取パイプに対して室内側又は窓側にオフセットして設け、プーリを第１巻取パイプと第２巻取パイプの間に位置させ、歯車列が収容された歯車ケースと操作チェーンの上部及びプーリを収容しかつ下面及び下部側面が開口したプーリカバーとによりプーリ及び歯車ユニットを構成し、更にプーリ及び歯車ユニットを第１及び第２巻取パイプの右側又は左側のいずれかに一方に位置した状態で支持バーを複数のブラケットに取付け可能に構成したので、プーリ及び歯車ユニットが第１及び第２巻取パイプの右側に位置した状態で、支持バーを複数のブラケットに取付けることができるとともに、支持バーを左右反転させてプーリ及び歯車ユニットが第１及び第２巻取パイプの左側に位置した状態で、支持バーを複数のブラケットに取付けることができる。この結果、ロールスクリーンの設置場所における操作性により、プーリ及び歯車ユニットが第１及び第２巻取パイプの右側に位置した状態であっても、或いはプーリ及び歯車ユニットが第１及び第２巻取パイプの左側に位置した状態であっても、同一のプーリ及び歯車ユニットを用いることができる。従って、１種類のプーリ及び歯車ユニットを用意するだけで済むので、部品点数を低減できる。また、操作チェーンの一方を引下げると、この操作力がプーリ及び歯車ユニットを介して第１巻取パイプに伝達され、操作チェーンの他方を引下げると、この操作力がプーリ及び歯車ユニットを介して第２巻取パイプに伝達されるので、第１巻取パイプを回転させるための操作力と、第２巻取パイプを回転させるための操作力とが同一になり、操作チェーンの操作性に違和感が生じることはない。 In the roll screen according to the first aspect of the present invention, the first take-up pipe is provided offset to the indoor side or the window side with respect to the second take-up pipe, and the pulleys of the first take-up pipe and the second take-up pipe are provided. A pulley and a gear unit are formed by a gear case located between them and a pulley cover accommodating an upper part and a pulley of an operation chain and having an open lower surface and a lower side surface, and further a pulley and a gear unit. Since the support bar can be attached to a plurality of brackets while being located on either the right side or the left side of the 1st and 2nd take-up pipes, the pulley and the gear unit are on the right side of the 1st and 2nd take-up pipes. The support bar can be attached to multiple brackets while it is located at, and the support bar is flipped left and right so that the pulley and gear unit are located on the left side of the first and second take-up pipes. Can be attached to multiple brackets. As a result, depending on the operability at the installation location of the roll screen, the pulley and gear unit may be located on the right side of the first and second take-up pipes, or the pulley and gear unit may take up the first and second take-up pipes. The same pulley and gear unit can be used even when located on the left side of the pipe. Therefore, since it is only necessary to prepare one type of pulley and gear unit, the number of parts can be reduced. Further, when one of the operating chains is pulled down, this operating force is transmitted to the first take-up pipe via the pulley and the gear unit, and when the other of the operating chains is pulled down, this operating force is transmitted via the pulley and the gear unit. Since it is transmitted to the second take-up pipe, the operating force for rotating the first take-up pipe and the operating force for rotating the second take-up pipe become the same, and the operability of the operation chain is improved. There is no sense of discomfort.

本発明の第２の観点のロールスクリーンでは、ビスを通孔に挿通して補強用ボスに螺合することによりプーリカバーの下端を歯車ケースに固定したので、補強用ボスに操作チェーンが接触する場合があるけれども、このとき操作チェーンを補強用ボスに遊嵌するように配索することにより、操作チェーンの操作性を改善できる。この結果、操作チェーンの操作性に僅かな影響を与えるだけで、プーリカバーの強度を確保できる。 In the roll screen according to the second aspect of the present invention, the lower end of the pulley cover is fixed to the gear case by inserting the screw into the through hole and screwing it into the reinforcing boss, so that the operation chain comes into contact with the reinforcing boss. In some cases, the operability of the operation chain can be improved by arranging the operation chain so as to be loosely fitted to the reinforcing boss at this time. As a result, the strength of the pulley cover can be ensured with only a slight influence on the operability of the operation chain.

本発明の第３の観点のロールスクリーンでは、補強用ボスに軟質樹脂又は軟質ゴムにより形成された軟質筒状体を嵌入したので、軟質筒状体に操作チェーンが接触したときに発生する異音が軟質筒状体により吸収される。この結果、上記異音の発生を防止できる。 In the roll screen according to the third aspect of the present invention, since the soft tubular body formed of the soft resin or the soft rubber is fitted into the reinforcing boss, an abnormal noise generated when the operation chain comes into contact with the soft tubular body. Is absorbed by the soft tubular body. As a result, the occurrence of the abnormal noise can be prevented.

本発明の第４の観点のロールスクリーンでは、プーリから垂下された操作チェーンの室内側の操作部及び窓側の操作部が補強用ボスより窓側に位置するとき、操作チェーンの室内側の操作部を補強用ボスより室内側に位置するように配索したので、操作チェーンを室内側に斜め下方に引下げることにより、操作チェーンが補強用ボス又は軟質筒状体に接触するのを抑制できる。この結果、操作チェーンの操作性に殆ど影響を与えることなく、プーリカバーの強度を確保できる。 In the roll screen according to the fourth aspect of the present invention, when the indoor side operation part and the window side operation part of the operation chain hanging from the pulley are located on the window side from the reinforcing boss, the indoor side operation part of the operation chain is operated. Since the wiring is arranged so as to be located on the indoor side of the reinforcing boss, it is possible to prevent the operation chain from coming into contact with the reinforcing boss or the soft tubular body by pulling the operation chain diagonally downward toward the room. As a result, the strength of the pulley cover can be ensured with almost no effect on the operability of the operation chain.

本発明第１実施形態のプーリ及び歯車ユニットを第１及び第２巻取パイプの右側に取付けた状態であって歯車ケースからプーリカバーを取外した状態を示すロールスクリーンの右側面図である。It is a right side view of the roll screen which shows the state which the pulley and the gear unit of 1st Embodiment of this invention are attached to the right side of the 1st and 2nd take-up pipe, and the pulley cover is removed from a gear case. そのプーリ及び歯車ユニットを第１及び第２巻取パイプの左側に取付けた状態であって歯車ケースからプーリカバーを取外した状態を示すロールスクリーンの左側面図である。It is a left side view of the roll screen which shows the state which the pulley and the gear unit are attached to the left side of the 1st and 2nd take-up pipes, and the state where the pulley cover is removed from a gear case. 図４のＡ−Ａ線断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG. 図３のＢ−Ｂ線断面図である。FIG. 3 is a cross-sectional view taken along the line BB of FIG. 図１のＣ−Ｃ線断面図である。FIG. 5 is a cross-sectional view taken along the line CC of FIG. 本発明第２実施形態のプーリ及び歯車ユニットを第１及び第２巻取パイプの右側に取付けた状態であって歯車ケースからプーリカバーを取外した状態を示すロールスクリーンの右側面図である。It is a right side view of the roll screen which shows the state which the pulley and the gear unit of the 2nd Embodiment of this invention are attached to the right side of the 1st and 2nd take-up pipes, and the pulley cover is removed from a gear case. そのプーリ及び歯車ユニットを第１及び第２巻取パイプの左側に取付けた状態であって歯車ケースからプーリカバーを取外した状態を示すロールスクリーンの左側面図である。It is a left side view of the roll screen which shows the state which the pulley and the gear unit are attached to the left side of the 1st and 2nd take-up pipes, and the state where the pulley cover is removed from a gear case.

次に本発明を実施するための形態を図面に基づいて説明する。 Next, a mode for carrying out the present invention will be described with reference to the drawings.

＜第１の実施の形態＞
図１、図３及び図５に示すように、ロールスクリーン１０は、壁１５に２つのブラケット１３を介して取付けられかつ両端に一対の支持部材１６，１７が取付けられた単一の支持バー１４と、一対の支持部材１６，１７に上下に間隔をあけて回転可能に取付けられた第１及び第２巻取パイプ１１，１２と、第１及び第２巻取パイプ１１，１２に上縁が固定された第１及び第２遮蔽体２１，２２と、第１及び第２巻取パイプ１１，１２にそれぞれ内蔵された第１及び第２巻取ばね３１，３２と、第１及び第２巻取パイプ１１，１２を正転又は逆転させる単一の操作チェーン１８と、操作チェーン１８と第１及び第２巻取パイプ１１，１２との間にそれぞれ設けられた第１及び第２回転伝達切換装置４１，４２と、操作チェーン１８が巻き掛けられる単一のプーリ１９と、プーリ１９と第１及び第２回転伝達切換装置４１，４２との間に設けられた歯車列２３とを備える。 <First Embodiment>
As shown in FIGS. 1, 3 and 5, the roll screen 10 is a single support bar 14 attached to the wall 15 via two brackets 13 and a pair of support members 16 and 17 attached to both ends. The upper edges of the first and second take-up pipes 11 and 12 and the first and second take-up pipes 11 and 12 which are rotatably attached to the pair of support members 16 and 17 at vertical intervals The first and second shields 21 and 22 fixed, the first and second take-up springs 31 and 32 built in the first and second take-up pipes 11 and 12, respectively, and the first and second windings. A single operation chain 18 for rotating the take-up pipes 11 and 12 in the forward or reverse direction, and first and second rotation transmission switching provided between the operation chain 18 and the first and second take-up pipes 11 and 12, respectively. The devices 41 and 42, a single pulley 19 on which the operation chain 18 is wound, and a gear train 23 provided between the pulley 19 and the first and second rotation transmission switching devices 41 and 42 are provided.

ブラケット１３は、図４に詳しく示すように、略Ｌ字状に形成された壁取付部１３ａと、この壁取付部１３ａの突出端下面に取付けられたバー保持部１３ｂとを有する。バー保持部１３ｂには室内側から窓側の方向に所定の間隔をあけて一対の被係止部１３ｃ，１３ｄが形成される。これらの被係止部１３ｃ，１３ｄは互いに近付く方向に図示しないばねにより付勢される。上記一対の被係止部１３ｃ，１３ｄは、この実施の形態では、互いに向き合う一対の爪状に形成される。また、支持バー１４は、第１及び第２巻取パイプ１１，１２と平行に設けられ上記一対の被係止部１３ｃ，１３ｄに係止可能な一対の係止部１４ｃ，１４ｄが形成されたバー本体１４ａと、このバー本体１４ａの一側縁から垂下されたカバー部１４ｂとを有する。上記一対の係止部１４ｃ，１４ｄは室内側から窓側の方向に所定の間隔をあけて形成される。また、上記一対の係止部１４ｃ，１４ｄは、この実施の形態では、互いに反対方向を向く凹溝状に形成される。 As shown in detail in FIG. 4, the bracket 13 has a wall mounting portion 13a formed in a substantially L shape, and a bar holding portion 13b mounted on the lower surface of the protruding end of the wall mounting portion 13a. A pair of locked portions 13c and 13d are formed in the bar holding portion 13b at predetermined intervals from the indoor side to the window side. These locked portions 13c and 13d are urged by a spring (not shown) in the direction of approaching each other. In this embodiment, the pair of locked portions 13c and 13d are formed in the shape of a pair of claws facing each other. Further, the support bar 14 is provided in parallel with the first and second take-up pipes 11 and 12, and a pair of locking portions 14c and 14d that can be locked to the pair of locked portions 13c and 13d are formed. It has a bar main body 14a and a cover portion 14b hanging from one side edge of the bar main body 14a. The pair of locking portions 14c and 14d are formed at predetermined intervals from the indoor side to the window side. Further, in this embodiment, the pair of locking portions 14c and 14d are formed in a concave groove shape facing in opposite directions.

一方、第１及び第２巻取パイプ１１，１２は互いに平行に配置され、第１巻取パイプ１１は第２巻取パイプ１２に対して室内側にオフセットして設けられる（図１及び図４）。具体的には、操作チェーン１８が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置したときに（図３）、第１巻取パイプ１１は一対の支持部材１６，１７の上部であって所定の距離だけ室内側に寄った位置に取付けられ、第２巻取パイプ１２は一対の支持部材１６，１７の下部であって所定の距離だけ窓側に寄った位置に取付けられる（図１及び図４）。そして、第１遮蔽体２１は第１巻取パイプ１１の室内側の面から垂下され、第２遮蔽体２２は第２巻取パイプ１２の窓側の面から垂下される。 On the other hand, the first and second take-up pipes 11 and 12 are arranged parallel to each other, and the first take-up pipe 11 is provided offset to the indoor side with respect to the second take-up pipe 12 (FIGS. 1 and 4). ). Specifically, when the roll screen 10 is installed so that the operation chain 18 is located on the right side of the first and second take-up pipes 11 and 12 (FIG. 3), the first take-up pipe 11 has a pair of supports. The second take-up pipe 12 was attached to the upper part of the members 16 and 17 at a position closer to the indoor side by a predetermined distance, and the second take-up pipe 12 was the lower part of the pair of support members 16 and 17 and closer to the window side by a predetermined distance. Installed in position (FIGS. 1 and 4). Then, the first shield 21 is hung from the indoor side surface of the first take-up pipe 11, and the second shield 22 is hung from the window side surface of the second take-up pipe 12.

第１及び第２巻取ばね３１，３２には第１及び第２遮蔽体２１，２２を第１及び第２巻取パイプ１１，１２に巻取る方向に第１及び第２巻取パイプ１１，１２を回転させるための付勢力がそれぞれ蓄えられる（図３）。また、単一の操作チェーン１８は、第１及び第２遮蔽体２１，２２をそれぞれ繰出し又は巻取るために操作される。また、歯車列２３は、単一のプーリ１９と一体的に設けられた駆動歯車２３ａと、この駆動歯車２３ａに噛合する中間歯車２３ｂと、この中間歯車２３ｂに噛合し第１回転伝達切換装置４１に連結された第１従動歯車２３ｃと、中間歯車２３ｂに噛合し第２回転伝達切換装置４２に連結された第２従動歯車２３ｄとを有する（図２及び図５）。そして、上記歯車列２３により、操作チェーン１８の操作力がプーリ１９から第１及び第２回転伝達切換装置４１，４２に伝達されるようになっている。これらの歯車２３ａ〜２３ｄは歯車ケース２４に回転可能にそれぞれ収容され、この歯車ケース２４にビス（図示せず）により取付けられたプーリカバー２６に上記プーリ１９が収容される。そして歯車ケース２４及びプーリカバー２６により一方の支持部材１６が構成されるとともに、歯車列２３が収容された歯車ケース２４とこの歯車ケース２４に取付けられ操作チェーン１８の上部及びプーリ１９を収容しかつ下面及び下部側面が開口したプーリカバー２６とによりプーリ及び歯車ユニット２７が構成される。更に、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側又は左側のいずれかに一方に位置した状態で支持バー１４が２つのブラケット１３，１３に取付け可能に構成される。具体的には、図４に詳しく示すように、支持バー１４の一対の係止部１４ｃ，１４ｄから等距離にある点（中点）を通りかつ壁１５に平行な鉛直面を面Ｘとし、第１巻取パイプ１１の軸線を含む鉛直面と第２巻取パイプ１２の軸線を含む鉛直面との間に両鉛直面から等距離に位置する鉛直面を面Ｙとするとき、面Ｘと面Ｙが一致するように構成される。 The first and second take-up springs 31 and 32 have the first and second take-up pipes 11 and 2 in the direction in which the first and second shields 21 and 22 are taken up by the first and second take-up pipes 11 and 12. The urging force for rotating the 12 is stored (Fig. 3). In addition, the single operation chain 18 is operated to unwind or wind the first and second shields 21 and 22, respectively. Further, the gear train 23 includes a drive gear 23a integrally provided with a single pulley 19, an intermediate gear 23b that meshes with the drive gear 23a, and a first rotation transmission switching device 41 that meshes with the intermediate gear 23b. It has a first driven gear 23c connected to the second driven gear 23d, and a second driven gear 23d meshed with the intermediate gear 23b and connected to the second rotation transmission switching device 42 (FIGS. 2 and 5). Then, the operating force of the operating chain 18 is transmitted from the pulley 19 to the first and second rotation transmission switching devices 41 and 42 by the gear train 23. These gears 23a to 23d are rotatably housed in the gear case 24, respectively, and the pulley 19 is housed in a pulley cover 26 attached to the gear case 24 by screws (not shown). The gear case 24 and the pulley cover 26 form one of the support members 16, and the gear case 24 in which the gear train 23 is housed and the upper part of the operation chain 18 and the pulley 19 attached to the gear case 24 are housed. The pulley and the gear unit 27 are configured by the pulley cover 26 having the lower surface and the lower side surface open. Further, the support bar 14 can be attached to the two brackets 13 and 13 with the pulley and the gear unit 27 located on either the right side or the left side of the first and second take-up pipes 11 and 12. .. Specifically, as shown in detail in FIG. 4, the plane X is defined as a vertical plane that passes through a point (midpoint) equidistant from the pair of locking portions 14c and 14d of the support bar 14 and is parallel to the wall 15. When the vertical surface including the axis of the first take-up pipe 11 and the vertical surface including the axis of the second take-up pipe 12 are equidistant from both vertical faces as the surface Y, the surface X and The faces Y are configured to match.

一方、歯車ケース２４の下端外面には、この歯車ケース２４の下端外面からからプーリカバー２６の下端内面に向って補強用ボス２４ａが突設される（図１、図２及び図５）。また、プーリカバー２６には通孔２６ａが補強用ボス２４ａに対向して形成される。この通孔２６ａにビス２８を挿通して補強用ボス２４ａに螺合することによりプーリカバー２６の下端が歯車ケース２４に固定される。これによりプーリカバー２６下部の強度を確保できる。また、補強用ボス２４ａには軟質樹脂又は軟質ゴムにより形成された軟質筒状体２９が嵌入される。更に、操作チェーン１８が第１及び第２巻取パイプ１１，１２の左側に位置するようにロールスクリーン１０を設置した場合（図２）、プーリ１９から垂下された操作チェーン１８の室内側の操作部及び窓側の操作部が補強用ボス２４ａより窓側に位置するため、操作チェーン１８の室内側の操作部が補強用ボス２４ａより室内側に位置するように配索される。即ち、操作チェーン１８が補強用ボス２４ａに遊嵌されるように構成される。 On the other hand, a reinforcing boss 24a is projected from the outer surface of the lower end of the gear case 24 toward the inner surface of the lower end of the pulley cover 26 on the outer surface of the lower end of the gear case 24 (FIGS. 1, 2 and 5). Further, a through hole 26a is formed in the pulley cover 26 so as to face the reinforcing boss 24a. The lower end of the pulley cover 26 is fixed to the gear case 24 by inserting the screw 28 into the through hole 26a and screwing it into the reinforcing boss 24a. As a result, the strength of the lower part of the pulley cover 26 can be secured. Further, a soft tubular body 29 formed of a soft resin or a soft rubber is fitted into the reinforcing boss 24a. Further, when the roll screen 10 is installed so that the operation chain 18 is located on the left side of the first and second take-up pipes 11 and 12 (FIG. 2), the operation on the indoor side of the operation chain 18 suspended from the pulley 19 is performed. Since the portion and the operation portion on the window side are located on the window side of the reinforcing boss 24a, the operation portion on the indoor side of the operation chain 18 is arranged so as to be located on the indoor side of the reinforcing boss 24a. That is, the operation chain 18 is configured to be loosely fitted to the reinforcing boss 24a.

一方、第１回転伝達切換装置４１は操作チェーン１８と第１巻取パイプ１１との間に設けられ、第２回転伝達切換装置４２は操作チェーン１８と第２巻取パイプ１２との間に設けられる（図５）。第１回転伝達切換装置４１は、操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に引下げ操作したときにこの操作力を第１巻取パイプ１１に伝達しかつ操作チェーン１８の窓側の操作部を図１の破線矢印で示す方向に引下げ操作したときにこの操作力を第１巻取パイプ１１に伝達しないクラッチ機能と、操作チェーン１８の室内側の操作部の引下げ操作を停止することにより第１巻取パイプ１１をその位置に一時的に固定するロック機能と、操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に僅かに引下げ操作することにより上記一時的な固定を解除するロック解除機能とを有する。即ち、第１回転伝達切換装置４１は、上記クラッチ機能を発揮する第１クラッチ部５１と、上記ロック機能及びロック解除機能を発揮する第１ストッパ部６１と、第１中間軸７１及び第１ストッパ部６１間に設けられ操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に引下げ操作したときに第１中間軸７１及び第１ストッパ部６１間に比較的小さいトルクを発生させる第１トルク発生部８１とを有する。なお、上記第１中間軸７１は第１従動歯車２３ｃに第１クラッチ部５１を介して連結される。 On the other hand, the first rotation transmission switching device 41 is provided between the operation chain 18 and the first take-up pipe 11, and the second rotation transmission switching device 42 is provided between the operation chain 18 and the second take-up pipe 12. (Fig. 5). When the operation unit on the indoor side of the operation chain 18 is pulled down in the direction indicated by the solid arrow in FIG. 1, the first rotation transmission switching device 41 transmits this operation force to the first take-up pipe 11 and the operation chain 18 The clutch function that does not transmit this operating force to the first take-up pipe 11 when the operation unit on the window side of the above is pulled down in the direction indicated by the broken line arrow in FIG. 1 and the operation unit on the indoor side of the operation chain 18 are pulled down. The lock function for temporarily fixing the first take-up pipe 11 to that position by stopping, and the operation of slightly pulling down the operation unit on the indoor side of the operation chain 18 in the direction indicated by the solid arrow in FIG. It has an unlocking function to release the temporary fixing. That is, in the first rotation transmission switching device 41, the first clutch portion 51 that exerts the clutch function, the first stopper portion 61 that exerts the lock function and the lock release function, the first intermediate shaft 71, and the first stopper A relatively small torque is generated between the first intermediate shaft 71 and the first stopper portion 61 when the operation portion on the indoor side of the operation chain 18 provided between the portions 61 is pulled down in the direction indicated by the solid line arrow in FIG. It has a first torque generating unit 81. The first intermediate shaft 71 is connected to the first driven gear 23c via the first clutch portion 51.

第１クラッチ部５１は、図示しないが、第１従動歯車２３ｃとともに回転可能に構成され第１中間軸７１を挿通可能な第１クラッチ用外輪と、第１中間軸７１の外周面に接する円柱状の複数の第１クラッチ用ローラと、複数の第１クラッチ用ローラを第１クラッチ用外輪の中にそれぞれ収容する複数の第１ローラ収容空間と、薄い金属ばね材を一体成型することにより形状された第１クラッチ用板ばねとを有する。複数の第１クラッチ用ローラは複数の第１ローラ収容空間内を第１クラッチ用外輪の円周方向に移動することにより、第１中間軸７１の第１クラッチ用外輪に対する相対回転を不能にするか、或いは第１中間軸７１の第１クラッチ用外輪に対する相対回転を可能にして第１クラッチ部５１を空転させるように構成される。また、第１ストッパ部６１は、操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に僅かに引下げ操作することにより第１遮蔽体２１を下降状態又は停止状態に切換えるように構成される（図１及び図５）。具体的には、第１ストッパ部６１は、第１トルク発生部８１に嵌入され外周面に第１カム溝６１ｂが形成された第１円筒カム６１ａと、この第１円筒カム６１ａを収容するように歯車ケース２４の上部にこの歯車ケース２４と一体的に設けられ第１中間軸７１の軸方向に延びる第１ガイド溝６１ｄが形成された第１カム用ケース６１ｃと、第１カム溝６１ｂと第１ガイド溝６１ｄとの重なる空間内を転動する単一の第１転動体６１ｅとを有する（図５）。更に、第１トルク発生部８１は、第１中間軸７１に相対回転不能に嵌入されかつ第１円筒カム６１ａが相対回転可能に嵌入された第１内輪部８１ａと、この第１内輪部８１ａに嵌入された第１捩りコイルばね８１ｂとを有する（図５）。第１円筒カム６１ａ及び第１内輪部８１ａ間のトルクは、この実施の形態では、第１遮蔽体２１を巻取る方向に第１巻取パイプ１１が回転するように第１巻取ばね３１が一定の荷重で付勢した状態で、第１遮蔽材２１及び第１ウエイトバー９１の自重により第１遮蔽体２１が第１巻取パイプ１１から繰出されるのを阻止する値に設定される。 Although not shown, the first clutch portion 51 is rotatably configured together with the first driven gear 23c and has a columnar shape in contact with the outer ring for the first clutch through which the first intermediate shaft 71 can be inserted and the outer peripheral surface of the first intermediate shaft 71. It is formed by integrally molding a plurality of first clutch rollers, a plurality of first roller accommodating spaces for accommodating a plurality of first clutch rollers in the outer ring for the first clutch, and a thin metal spring material. It also has a leaf spring for the first clutch. The plurality of first clutch rollers move in the circumferential direction of the first clutch outer ring in the plurality of first roller accommodating spaces, thereby disabling the relative rotation of the first intermediate shaft 71 with respect to the first clutch outer ring. Alternatively, the first clutch portion 51 is configured to idle by allowing the first intermediate shaft 71 to rotate relative to the outer ring for the first clutch. Further, the first stopper portion 61 switches the first shield 21 to the lowered state or the stopped state by slightly pulling down the operation portion on the indoor side of the operation chain 18 in the direction indicated by the solid arrow in FIG. It is configured (FIGS. 1 and 5). Specifically, the first stopper portion 61 accommodates the first cylindrical cam 61a, which is fitted into the first torque generating portion 81 and has the first cam groove 61b formed on the outer peripheral surface, and the first cylindrical cam 61a. A first cam case 61c and a first cam groove 61b in which a first guide groove 61d extending in the axial direction of the first intermediate shaft 71 is formed integrally with the gear case 24 on the upper part of the gear case 24. It has a single first rolling element 61e that rolls in a space that overlaps with the first guide groove 61d (FIG. 5). Further, the first torque generating portion 81 is fitted into the first inner ring portion 81a which is fitted into the first intermediate shaft 71 so as to be relatively non-rotatable and the first cylindrical cam 61a is fitted into the first inner ring portion 81a so as to be relatively rotatable, and the first inner ring portion 81a. It has an fitted first torsion coil spring 81b (FIG. 5). In this embodiment, the torque between the first cylindrical cam 61a and the first inner ring portion 81a is such that the first take-up spring 31 rotates so that the first take-up pipe 11 rotates in the direction of taking up the first shield 21. In a state of being urged with a constant load, the value is set to prevent the first shield 21 from being unwound from the first take-up pipe 11 due to the weight of the first shield 21 and the first weight bar 91.

第２回転伝達切換装置４２は、操作チェーン１８の窓側の操作部を図１の破線矢印の方向に引下げ操作したときにこの操作力を第２巻取パイプ１２に伝達しかつ操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に引下げ操作したときにこの操作力を第２巻取パイプ１２に伝達しないクラッチ機能と、操作チェーン１８の窓側の操作部の図１の破線矢印で示す方向への引下げ操作を停止することにより第２巻取パイプ１２をその位置に一時的に固定するロック機能と、操作チェーン１８の窓側の操作部を図１の破線矢印で示す方向に引下げ操作することにより上記一時的な固定を解除するロック解除機能とを有する。即ち、第２回転伝達切換装置４２は、上記クラッチ機能を発揮する第２クラッチ部５２と、上記ロック機能及びロック解除機能を発揮する第２ストッパ部６２と、第２中間軸７２及び第２ストッパ部６２間に設けられ操作チェーン１８の窓側の操作部を図１の破線矢印で示す方向に引下げ操作したときに第２中間軸７２及び第２ストッパ部６２間に比較的小さいトルクを発生させる第２トルク発生部８２とを有する（図５）。なお、上記第２中間軸７２は第２従動歯車２３ｄに第２クラッチ部５２を介して連結される。 The second rotation transmission switching device 42 transmits this operating force to the second take-up pipe 12 when the operation unit on the window side of the operation chain 18 is pulled down in the direction of the broken line arrow in FIG. 1, and the chamber of the operation chain 18. A clutch function that does not transmit this operating force to the second take-up pipe 12 when the inner operating unit is pulled down in the direction indicated by the solid arrow in FIG. 1, and a broken line arrow in FIG. 1 of the operating unit on the window side of the operating chain 18. A lock function that temporarily fixes the second take-up pipe 12 at that position by stopping the pulling operation in the direction shown by, and pulling down the operation portion on the window side of the operation chain 18 in the direction indicated by the broken line arrow in FIG. It has an unlock function that releases the temporary fixing by operating it. That is, in the second rotation transmission switching device 42, the second clutch portion 52 that exerts the clutch function, the second stopper portion 62 that exerts the lock function and the lock release function, the second intermediate shaft 72, and the second stopper A second intermediate shaft 72 and a second stopper 62 that are provided between the portions 62 generate a relatively small torque when the operation portion on the window side of the operation chain 18 is pulled down in the direction indicated by the broken line arrow in FIG. It has two torque generating units 82 (FIG. 5). The second intermediate shaft 72 is connected to the second driven gear 23d via the second clutch portion 52.

第２クラッチ部５２は、図示しないが、第２従動歯車２３ｄとともに回転可能に構成され第２中間軸７２を挿通可能な第２クラッチ用外輪と、第２中間軸７２の外周面に接する円柱状の複数の第２クラッチ用ローラと、複数の第２クラッチ用ローラを第２クラッチ用外輪の中にそれぞれ収容する複数の第２ローラ収容空間と、薄い金属ばね材を一体成型することにより形状された第２クラッチ用板ばねとを有する。複数の第２クラッチ用ローラは複数の第２ローラ収容空間内を第２クラッチ用外輪の円周方向に移動することにより、第２中間軸７２の第２クラッチ用外輪に対する相対回転を不能にするか、或いは第２中間軸７２の第２クラッチ用外輪に対する相対回転を可能にして第２クラッチ部５２を空転させるように構成される。また、第２ストッパ部６２は、操作チェーン１８の窓側の操作部を図１の破線矢印で示す方向に僅かに引下げ操作することにより第２遮蔽体２１を下降状態又は停止状態に切換えるように構成される（図１及び図５）。具体的には、第２ストッパ部６２は、後述の第２トルク発生部８２に嵌入され外周面に第２カム溝６２ｂが形成された第２円筒カム６２ａと、この第２円筒カム６２ａを収容するように歯車ケース２４の下部にこの歯車ケース２４と一体的に設けられ第２中間軸７２の軸方向に延びる第２ガイド溝６２ｄが形成された第２カム用ケース６２ｃと、第２カム溝６２ｂと第２ガイド溝６２ｄとの重なる空間内を転動する第２転動体６２ｅとを有する（図５）。更に、第２トルク発生部８２は、第２中間軸７２に相対回転不能に嵌入されかつ第２円筒カム６２ａが相対回転可能に嵌入された第２内輪部８２ａと、この第２内輪部８２ａに嵌入された第２捩りコイルばね８２ｂとを有する（図５）。第２円筒カム６２ａ及び第２内輪部８２ａ間のトルクは、この実施の形態では、第２遮蔽体２２を巻取る方向に第２巻取パイプ１２が回転するように第２巻取ばね３２が一定の荷重で付勢した状態で、第２遮蔽材２２及び第２ウエイトバー９２の自重により第２遮蔽体２２が第２巻取パイプ１２から繰出されるのを阻止する値に設定される。なお、第１カム用ケース６１ｃには、第１巻取パイプ１１の一端を嵌着可能な第１筒体１０１が回転可能に嵌入され、第２カム用ケース６２ｃには、第２巻取パイプ１２の一端を嵌着可能な第２筒体１０２が回転可能に嵌入される（図３及び図５）。 Although not shown, the second clutch portion 52 is rotatably configured together with the second driven gear 23d and has a columnar shape in contact with the outer ring for the second clutch through which the second intermediate shaft 72 can be inserted and the outer peripheral surface of the second intermediate shaft 72. The shape is formed by integrally molding a plurality of second clutch rollers, a plurality of second roller accommodation spaces for accommodating a plurality of second clutch rollers in the outer ring for the second clutch, and a thin metal spring material. It also has a leaf spring for the second clutch. The plurality of second clutch rollers move in the circumferential direction of the second clutch outer ring in the plurality of second roller accommodating spaces, thereby disabling the relative rotation of the second intermediate shaft 72 with respect to the second clutch outer ring. Alternatively, the second clutch portion 52 is configured to idle by allowing the second intermediate shaft 72 to rotate relative to the outer ring for the second clutch. Further, the second stopper portion 62 is configured to switch the second shield 21 to the lowered state or the stopped state by slightly pulling down the operation portion on the window side of the operation chain 18 in the direction indicated by the broken line arrow in FIG. (FIGS. 1 and 5). Specifically, the second stopper portion 62 accommodates the second cylindrical cam 62a, which is fitted into the second torque generating portion 82 described later and has the second cam groove 62b formed on the outer peripheral surface, and the second cylindrical cam 62a. A second cam case 62c and a second cam groove are formed at the lower part of the gear case 24 so as to be integrally provided with the gear case 24 and a second guide groove 62d extending in the axial direction of the second intermediate shaft 72 is formed. It has a second rolling element 62e that rolls in the space where the 62b and the second guide groove 62d overlap (FIG. 5). Further, the second torque generating portion 82 is fitted into the second inner ring portion 82a, which is fitted into the second intermediate shaft 72 so as to be relatively non-rotatable, and the second cylindrical cam 62a is fitted into the second inner ring portion 82a, and the second inner ring portion 82a. It has an fitted second torsion coil spring 82b (FIG. 5). In this embodiment, the torque between the second cylindrical cam 62a and the second inner ring portion 82a is such that the second take-up spring 32 rotates so that the second take-up pipe 12 rotates in the direction of taking up the second shield 22. In a state of being urged with a constant load, the value is set to prevent the second shield 22 from being unwound from the second take-up pipe 12 due to the weight of the second shield 22 and the second weight bar 92. The first cam case 61c is rotatably fitted with the first tubular body 101 to which one end of the first take-up pipe 11 can be fitted, and the second cam case 62c is fitted with the second take-up pipe. A second tubular body 102 into which one end of 12 can be fitted is rotatably fitted (FIGS. 3 and 5).

一方、第１回転伝達切換装置４１と第１巻取パイプ１１との間には、第１トルクリミッタ１１１が設けられ、第２回転伝達切換装置４２と第２巻取パイプ１２との間には、トルクの発生する回転方向を第１トルクリミッタ１１１と逆にした第２トルクリミッタ１１２が設けられる（図５）。上記第１トルクリミッタ１１１と第２トルクリミッタ１１２とは同一形状に形成される。そして、第１及び第２トルクリミッタ１１１，１１２は、外輪部１１３と、この外輪部１１３に相対回転可能に挿入された内輪部１１４と、外輪部１１３及び内輪部１１４間に介装されかつ所定値のトルクを発生させるトルク発生部１１６と、内輪部１１３の外輪部１１４に対する一方への相対回転を許容しかつ他方への相対回転を阻止するクラッチ部１１７とをそれぞれ有する。 On the other hand, a first torque limiter 111 is provided between the first rotation transmission switching device 41 and the first take-up pipe 11, and between the second rotation transmission switching device 42 and the second take-up pipe 12. A second torque limiter 112 is provided in which the rotation direction in which torque is generated is opposite to that of the first torque limiter 111 (FIG. 5). The first torque limiter 111 and the second torque limiter 112 are formed in the same shape. The first and second torque limiters 111 and 112 are interposed and predetermined between the outer ring portion 113, the inner ring portion 114 inserted into the outer ring portion 113 so as to be relatively rotatable, and the outer ring portion 113 and the inner ring portion 114. It has a torque generating unit 116 that generates a value torque, and a clutch unit 117 that allows the inner ring portion 113 to rotate relative to the outer ring portion 114 and prevents the relative rotation to the other.

第１トルクリミッタ１１１は第１筒体１０１と一体的に形成された第１リミッタケース１２１に収容され、この第１リミッタケース１２１の先端面は第１リミッタキャップ１３１により閉止される（図３及び図５）。これにより外輪部１１３が第１巻取パイプ１１に固定されかつ内輪部１１４が第１回転伝達切換装置４１に連結される。また、第２トルクリミッタ１１２は第２筒体１０２と一体的に形成された第２リミッタケース１２２に収容され、この第２リミッタケース１２２の先端面は第２リミッタキャップ１３２により閉止される。これにより外輪部１１３が第２巻取パイプ１２に固定されかつ内輪部１１４が第２回転伝達切換装置４２に連結される。 The first torque limiter 111 is housed in a first limiter case 121 integrally formed with the first tubular body 101, and the tip surface of the first limiter case 121 is closed by the first limiter cap 131 (FIGS. 3 and 3). FIG. 5). As a result, the outer ring portion 113 is fixed to the first take-up pipe 11 and the inner ring portion 114 is connected to the first rotation transmission switching device 41. Further, the second torque limiter 112 is housed in a second limiter case 122 integrally formed with the second cylinder body 102, and the tip surface of the second limiter case 122 is closed by the second limiter cap 132. As a result, the outer ring portion 113 is fixed to the second take-up pipe 12, and the inner ring portion 114 is connected to the second rotation transmission switching device 42.

トルク発生部１１６は、出力軸１１８に相対回転可能に嵌入されかつ外輪部１１３が相対回転可能に嵌入された内輪部１１４と、この内輪部１１４に嵌入された捩りコイルばね１１９とを有する（図５）。第１トルクリミッタ１１１の出力軸１１８は、第１回転伝達切換装置４１の第１ストッパ部６１及び第１トルク発生部８１の第１中間軸７１に対してスライドすることにより第１中間軸７１に相対回転不能に連結されるか又は第１中間軸７１に対して相対回転可能に構成される。第２トルクリミッタ１１２の出力軸１１８は、第２回転伝達切換装置４２の第２ストッパ部６２及び第２トルク発生部８２の第２中間軸７２に対してスライドすることにより第２中間軸７２に相対回転不能に連結されるか又は第２中間軸７２に対して相対回転可能に構成される。 The torque generating portion 116 has an inner ring portion 114 fitted into the output shaft 118 so as to be relatively rotatable and the outer ring portion 113 is fitted so as to be relatively rotatable, and a torsion coil spring 119 fitted into the inner ring portion 114 (FIG. FIG. 5). The output shaft 118 of the first torque limiter 111 slides with respect to the first stopper portion 61 of the first rotation transmission switching device 41 and the first intermediate shaft 71 of the first torque generating portion 81 to become the first intermediate shaft 71. It is connected so that it cannot rotate relative to each other, or it is configured to be rotatable relative to the first intermediate shaft 71. The output shaft 118 of the second torque limiter 112 slides with respect to the second stopper portion 62 of the second rotation transmission switching device 42 and the second intermediate shaft 72 of the second torque generating portion 82 to become the second intermediate shaft 72. It is connected so that it cannot rotate relative to each other, or it is configured to be rotatable relative to the second intermediate shaft 72.

図５に示すように、クラッチ部１１７は、出力軸１１８に嵌入された上記内輪部１１４と、出力軸１１８の外周面に接する円柱状の複数のローラ１２３と、複数のローラ１２３を内輪部１１４の中にそれぞれ収容するローラ収容空間１２０と、薄い金属ばね材を一体成型することにより形状された板ばね（図示せず）とを有する。第１トルクリミッタ１１１のクラッチ部１１７は、出力軸１１８が第１遮蔽体２１を繰出す方向に回転するとき、出力軸１１８の回転が外輪部１１３に伝達され、出力軸１１８が第１遮蔽体２１を巻取る方向に回転するとき、出力軸１１８の回転が外輪部１１３に伝達されないように構成される。このため、上記とは逆に、第１遮蔽体２１下端の第１ウエイトバー９１を把持して第１遮蔽体２１を第１巻取パイプ１１から繰出す方向への回転は出力軸１１８に伝達されず、第１遮蔽体２１側から第１遮蔽体２１を第１巻取パイプ１１に巻取る方向への回転は出力軸１１８に伝達されるようになっている。一方、第２トルクリミッタ１１２のクラッチ部１１７は、出力軸１１８が第２遮蔽体２２を繰出す方向に回転するとき、出力軸１１８の回転が外輪部１１３に伝達され、出力軸１１８が第２遮蔽体２２を巻取る方向に回転するとき、出力軸１１８の回転が外輪部１１３に伝達されないように構成される。このため、上記とは逆に、第２遮蔽体２２下端の第２ウエイトバー９２を把持して第２遮蔽体２２を第２巻取パイプ１２から繰出す方向への回転は出力軸１１８に伝達されず、第２遮蔽体２２側から第２遮蔽体２２を第２巻取パイプ１２に巻取る方向への回転は出力軸１１８に伝達されるようになっている。なお、図１、図２及び図４中の符号１４１は、第１遮蔽体２１が第１巻取ばね３１の付勢力により第１巻取パイプ１１に巻取られたときに第１ウエイトバー９１が当接する第１クッションバーであり、符号１４２は、第２遮蔽体２２が第２巻取ばね３２の付勢力により第２巻取パイプ１２に巻取られたときに第２ウエイトバー９２が当接する第２クッションバーである。 As shown in FIG. 5, the clutch portion 117 includes the inner ring portion 114 fitted in the output shaft 118, a plurality of columnar rollers 123 in contact with the outer peripheral surface of the output shaft 118, and a plurality of rollers 123 in the inner ring portion 114. It has a roller accommodating space 120 for accommodating each of them, and a leaf spring (not shown) shaped by integrally molding a thin metal spring material. In the clutch portion 117 of the first torque limiter 111, when the output shaft 118 rotates in the direction of feeding out the first shield 21, the rotation of the output shaft 118 is transmitted to the outer ring portion 113, and the output shaft 118 is the first shield. When the 21 is rotated in the winding direction, the rotation of the output shaft 118 is not transmitted to the outer ring portion 113. Therefore, contrary to the above, the rotation in the direction of gripping the first weight bar 91 at the lower end of the first shield 21 and feeding the first shield 21 from the first take-up pipe 11 is transmitted to the output shaft 118. Instead, the rotation in the direction of winding the first shield 21 around the first take-up pipe 11 from the first shield 21 side is transmitted to the output shaft 118. On the other hand, in the clutch portion 117 of the second torque limiter 112, when the output shaft 118 rotates in the direction of feeding out the second shield 22, the rotation of the output shaft 118 is transmitted to the outer ring portion 113, and the output shaft 118 is second. When the shield 22 is rotated in the winding direction, the rotation of the output shaft 118 is not transmitted to the outer ring portion 113. Therefore, contrary to the above, the rotation in the direction of gripping the second weight bar 92 at the lower end of the second shield 22 and feeding the second shield 22 from the second take-up pipe 12 is transmitted to the output shaft 118. Instead, the rotation in the direction of winding the second shield 22 around the second take-up pipe 12 from the second shield 22 side is transmitted to the output shaft 118. Reference numeral 141 in FIGS. 1, 2 and 4 is a first weight bar 91 when the first shield 21 is wound around the first take-up pipe 11 by the urging force of the first take-up spring 31. Reference numeral 142 indicates that the second weight bar 92 hits the second shield bar 92 when the second shield 22 is wound around the second take-up pipe 12 by the urging force of the second take-up spring 32. It is the second cushion bar that comes into contact.

このように構成されたロールスクリーン１０の動作を説明する。図１及び図３に示すように、操作チェーン１８が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置した状態、即ち、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置した状態で、支持バー１４の一対の係止部１４ｃ，１４ｄをブラケット１３のバー保持部１３ｂの一対の被係止部１３ｃ，１３ｄに係止させて、支持バー１４を２つのブラケット１３，１３に取付ける。一方、支持バー１４を２つのブラケット１３，１３から外し、ロールブラインド１０を左右反転させて、図２に示すように、操作チェーン１８が第１及び第２巻取パイプ１１，１２の左側に位置するようにロールスクリーン１０を設置した状態、即ち、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の左側に位置するようにロールスクリーン１０を設置した状態で、支持バー１４の一対の係止部１４ｃ，１４ｄをブラケット１３のバー保持部１３ｂの一対の被係止部１３ｃ，１３ｄに係止させて、支持バー１４をブラケット１３，１３に取付ける。このときプーリ及び歯車ユニット２７を第１及び第２巻取パイプ１１，１２の右側又は左側のいずれかに一方に位置した状態で支持バー１４をブラケット１３，１３に取付け可能に構成しているので、即ち支持バー１４の一対の係止部１４ｃ，１４ｄから等距離にある点（中点）を通りかつ壁１５に平行な鉛直面を面Ｘとし、第１巻取パイプ１１の軸線を含む鉛直面と第２巻取パイプ１２の軸線を含む鉛直面との間に両鉛直面から等距離に位置する鉛直面を面Ｙとするとき、面Ｘと面Ｙが一致するように構成しているので（図４）、支持バー１４がブラケット１３の壁取付部１３ｂや壁１５に接触することなく、しかも第１遮蔽体１１が第２遮蔽体１２の位置に垂下され、第２遮蔽体１２が第１遮蔽体１１の位置に垂下されるので、室内が狭くなることもない。このように、ロールスクリーン１０の設置場所における操作性により、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側に位置した状態であっても、或いはプーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の左側に位置した状態であっても、同一のプーリ及び歯車ユニット２７を用いることができる。従って、１種類のプーリ及び歯車ユニット２７を用意するだけで済むので、部品点数を低減できる。 The operation of the roll screen 10 configured in this way will be described. As shown in FIGS. 1 and 3, the roll screen 10 is installed so that the operation chain 18 is located on the right side of the first and second take-up pipes 11 and 12, that is, the pulley and the gear unit 27 are the first. And with the roll screen 10 installed so as to be located on the right side of the second take-up pipes 11 and 12, the pair of locking portions 14c and 14d of the support bar 14 are engaged with the pair of the bar holding portions 13b of the bracket 13. The support bar 14 is attached to the two brackets 13 and 13 by locking the stop portions 13c and 13d. On the other hand, the support bar 14 is removed from the two brackets 13 and 13, the roll blind 10 is inverted left and right, and the operation chain 18 is located on the left side of the first and second take-up pipes 11 and 12 as shown in FIG. With the roll screen 10 installed so as to do so, that is, with the roll screen 10 installed so that the pulley and the gear unit 27 are located on the left side of the first and second take-up pipes 11 and 12, the support bar 14 The support bar 14 is attached to the brackets 13 and 13 by locking the pair of locking portions 14c and 14d to the pair of locked portions 13c and 13d of the bar holding portion 13b of the bracket 13. At this time, since the support bar 14 can be attached to the brackets 13 and 13 with the pulley and the gear unit 27 located on either the right side or the left side of the first and second take-up pipes 11 and 12. That is, the plane X is the vertical plane that passes through a point (midpoint) equidistant from the pair of locking portions 14c and 14d of the support bar 14 and is parallel to the wall 15, and is vertical including the axis of the first take-up pipe 11. When the vertical surface located equidistant from both vertical surfaces between the surface and the vertical surface including the axis of the second take-up pipe 12 is defined as the surface Y, the surface X and the surface Y are configured to coincide with each other. Therefore (FIG. 4), the support bar 14 does not come into contact with the wall mounting portion 13b or the wall 15 of the bracket 13, and the first shield 11 is hung at the position of the second shield 12, and the second shield 12 is moved. Since it is hung at the position of the first shield 11, the room is not narrowed. In this way, depending on the operability at the installation location of the roll screen 10, even if the pulley and the gear unit 27 are located on the right side of the first and second take-up pipes 11 and 12, or the pulley and the gear unit 27 are The same pulley and gear unit 27 can be used even when they are located on the left side of the first and second take-up pipes 11 and 12. Therefore, since it is only necessary to prepare one type of pulley and gear unit 27, the number of parts can be reduced.

また、図１及び図３に示すように、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置した状態で、操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に引下げ操作すると、この操作力がプーリ１９、中間歯車２３ｂ、第１従動歯車２３ｃ、第１回転伝達切換装置４１、第１トルクリミッタ１１１及び第１筒体１０１を介して第１巻取パイプ１１に伝達され、操作チェーン１８の窓側の操作部を図１の破線矢印で示す方向に引下げ操作すると、この操作力がプーリ１９、中間歯車２３ｂ、第２従動歯車２３ｄ及び第２回転伝達切換装置４２を介して第２巻取パイプ１２に伝達される。即ち、操作チェーン１８のどちらの操作部を引下げ操作しても、操作力が同一形状の歯車を介して伝達されるので、第１巻取パイプ１１を回転させるための操作力と、第２巻取パイプ１２を回転させるための操作力とが同一になり、操作チェーン１８の操作性に違和感が生じることはない。 Further, as shown in FIGS. 1 and 3, the chamber of the operation chain 18 is provided with the roll screen 10 installed so that the pulley and the gear unit 27 are located on the right side of the first and second take-up pipes 11 and 12. When the inner operation unit is pulled down in the direction indicated by the solid line arrow in FIG. 1, this operating force is applied to the pulley 19, the intermediate gear 23b, the first driven gear 23c, the first rotation transmission switching device 41, the first torque limiter 111, and the first torque limiter 111. When the operation portion on the window side of the operation chain 18 is pulled down in the direction indicated by the broken line arrow in FIG. 1, the operating force is transmitted to the first take-up pipe 11 via the one cylinder 101, and this operating force is applied to the pulley 19, the intermediate gear 23b, It is transmitted to the second take-up pipe 12 via the second driven gear 23d and the second rotation transmission switching device 42. That is, no matter which operation unit of the operation chain 18 is pulled down, the operation force is transmitted through the gears having the same shape. Therefore, the operation force for rotating the first take-up pipe 11 and the second winding The operating force for rotating the take pipe 12 is the same, and the operability of the operating chain 18 does not feel uncomfortable.

一方、図１及び図３に示すように、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置した状態で、操作チェーン１８の室内側の操作部を図１の実線矢印で示す方向に引下げ操作する場合、操作チェーン１８を図１の二点鎖線で示すように室内側の斜め下方に引下げ操作する。このときプーリ１９から垂下された操作チェーン１８の室内側の操作部及び窓側の操作部が補強用ボス２４ａより室内側に位置するので、操作チェーン１８が補強用ボス２４ａに嵌入された軟質筒状体２９に接触することはなく、異音が発生しない。これに対し、図２に示すように、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の左側に位置するようにロールスクリーン１０を設置する場合、操作チェーン１８を補強用ボス２４ａに遊嵌するように配索しておく。この状態で、操作チェーン１８の室内側の操作部を図２の実線矢印で示す方向に引下げ操作する場合、操作チェーン１８を図２の二点鎖線で示すように室内側の斜め下方に引下げ操作する。これにより操作チェーン１８が軟質筒状体２９に殆ど接触することなく操作チェーン１８を操作できる。即ち、操作チェーン１８が軟質筒状体２９に接触するのを抑制できる。また、操作チェーン１８が軟質筒状体２９に接触しても、この接触により発生する異音が軟質筒状体２９により吸収されるので、上記異音の発生を防止できる。なお、操作チェーン１８の窓側の操作部を図２の破線矢印で示す方向に引下げ操作する場合、操作チェーン１８を図２の二点鎖線で示すように室内側の斜め下方に引下げ操作する。この場合も上記と同様の効果が得られる。また、プーリカバー２６の歯車ケース２４への取付構造は、ビス止めではなく、プーリカバー２６を歯車ケース２４に弾性変形可能な爪により脱着可能に取付けるか、プーリカバー２６の上端又は下端を歯車ケース２４にヒンジを介して取付けるか、プーリカバー２６を歯車ケース２４に対してスライド可能に取付けるか、プーリカバー２６を歯車ケース２４に対して回転開閉式に取付けることにより、操作チェーン１８が補強用ボス２４ａに遊嵌されない状態から遊嵌される状態に、或いは操作チェーン１８が補強用ボス２４ａに遊嵌される状態から遊嵌されない状態に比較的容易に切換えることができる。 On the other hand, as shown in FIGS. 1 and 3, the chamber of the operation chain 18 is provided with the roll screen 10 so that the pulley and the gear unit 27 are located on the right side of the first and second take-up pipes 11 and 12. When the inner operation unit is pulled down in the direction indicated by the solid arrow in FIG. 1, the operation chain 18 is pulled down diagonally downward on the indoor side as shown by the alternate long and short dash line in FIG. At this time, since the indoor operation unit and the window operation unit of the operation chain 18 hanging from the pulley 19 are located indoors from the reinforcing boss 24a, the operation chain 18 has a soft tubular shape fitted into the reinforcing boss 24a. It does not come into contact with the body 29 and no abnormal noise is generated. On the other hand, as shown in FIG. 2, when the roll screen 10 is installed so that the pulley and the gear unit 27 are located on the left side of the first and second take-up pipes 11 and 12, the operation chain 18 is bossed for reinforcement. Arrange so that it fits loosely in 24a. In this state, when the operation unit on the indoor side of the operation chain 18 is pulled down in the direction indicated by the solid arrow in FIG. 2, the operation chain 18 is pulled down diagonally downward on the indoor side as shown by the alternate long and short dash line in FIG. To do. As a result, the operation chain 18 can be operated with almost no contact with the soft tubular body 29. That is, it is possible to prevent the operation chain 18 from coming into contact with the soft tubular body 29. Further, even if the operation chain 18 comes into contact with the soft tubular body 29, the abnormal noise generated by this contact is absorbed by the soft tubular body 29, so that the generation of the abnormal noise can be prevented. When the operation unit on the window side of the operation chain 18 is pulled down in the direction indicated by the broken line arrow in FIG. 2, the operation chain 18 is pulled down diagonally downward on the indoor side as shown by the alternate long and short dash line in FIG. In this case as well, the same effect as described above can be obtained. Further, the attachment structure of the pulley cover 26 to the gear case 24 is not screwed, but the pulley cover 26 is detachably attached to the gear case 24 by an elastically deformable claw, or the upper end or the lower end of the pulley cover 26 is attached to the gear case. The operation chain 18 is a reinforcing boss by attaching the pulley cover 26 to the gear case 24 via a hinge, sliding the pulley cover 26 to the gear case 24, or attaching the pulley cover 26 to the gear case 24 in a rotary opening / closing manner. It is relatively easy to switch from a state in which the operation chain 18 is not loosely fitted to the state in which the operation chain 18 is loosely fitted in the reinforcing boss 24a to a state in which the operation chain 18 is not loosely fitted in the reinforcing boss 24a.

＜第２の実施の形態＞
図６及び図７は本発明の第２の実施の形態を示す。図６及び図７において図１及び図２と同一符号は同一部品を示す。この実施の形態では、第１の実施の形態の補強用ボス及び軟質筒状体が設けられない。なお、プーリカバー２６の下部の強度は、肉厚を厚くするか、リブを形成するか、或いは材質を変更することにより確保できる。上記以外は第１の実施の形態と同一に構成される。 <Second Embodiment>
6 and 7 show a second embodiment of the present invention. In FIGS. 6 and 7, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. In this embodiment, the reinforcing boss and the soft tubular body of the first embodiment are not provided. The strength of the lower part of the pulley cover 26 can be ensured by increasing the wall thickness, forming ribs, or changing the material. Other than the above, the configuration is the same as that of the first embodiment.

このように構成されたロールスクリーン１０では、プーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の右側に位置するようにロールスクリーン１０を設置した状態でも（図６）、或いはプーリ及び歯車ユニット２７が第１及び第２巻取パイプ１１，１２の左に位置するようにロールスクリーン１０を設置した状態でも（図７）、操作チェーン１８の操作時に操作チェーン１８が補強用ボス及び軟質筒状体に接触することがないので、その接触により異音が発生することはない。また、ロールスクリーン１０を左右反転させたときに、操作チェーン１８を補強ボスに遊嵌するという作業も不要になるので、操作チェーン１８の取り回しの自由度が高くなる。上記以外の動作は、第１の実施の形態の動作と略同様であるので、繰返しの説明を省略する。 In the roll screen 10 configured in this way, even when the roll screen 10 is installed so that the pulley and the gear unit 27 are located on the right side of the first and second take-up pipes 11 and 12 (FIG. 6), or the pulley. Even when the roll screen 10 is installed so that the gear unit 27 is located to the left of the first and second take-up pipes 11 and 12 (FIG. 7), the operation chain 18 is used as a reinforcing boss when the operation chain 18 is operated. Since it does not come into contact with the soft tubular body, no abnormal noise is generated by the contact. Further, when the roll screen 10 is flipped horizontally, the work of loosely fitting the operation chain 18 to the reinforcing boss becomes unnecessary, so that the degree of freedom in handling the operation chain 18 is increased. Since the operations other than the above are substantially the same as the operations of the first embodiment, the repeated description will be omitted.

なお、上記第１及び第２の実施の形態では、第１及び第２巻取パイプを、一対の支持部材、支持バー及びブラケットを介して壁に回転可能に取付けたが、第１及び第２巻取パイプを、一対の支持部材、支持バー及びブラケットを介して窓枠又は天井に回転可能に取付けてもよい。 In the first and second embodiments, the first and second take-up pipes are rotatably attached to the wall via a pair of support members, support bars and brackets, but the first and second take-up pipes are rotatably attached to the wall. The take-up pipe may be rotatably attached to the window frame or ceiling via a pair of support members, support bars and brackets.

１０ロールスクリーン
１１第１巻取パイプ
１２第２巻取パイプ
１３ブラケット
１４支持バー
１５壁
１６，１７支持部材
１８操作チェーン
１９プーリ
２１第１遮蔽体
２２第２遮蔽体
２３歯車列
２４歯車ケース
２４ａ補強用ボス
２６プーリカバー
２６ａ通孔
２７プーリ及び歯車ユニット
２８ビス
２９軟質筒状体
３１第１巻取ばね
３２第２巻取ばね
４１第１回転伝達切換装置
４２第２回転伝達切換装置 10 Roll screen 11 1st take-up pipe 12 2nd take-up pipe 13 Bracket 14 Support bar 15 Wall 16, 17 Support member 18 Operation chain 19 Pulley 21 1st shield 22 2nd shield 23 Gear train 24 Gear case 24a Reinforcement Boss 26 Pulley cover 26a Through hole 27 Pulley and gear unit 28 Screw 29 Soft tubular body 31 1st take-up spring 32 2nd take-up spring 41 1st rotation transmission switching device 42 2nd rotation transmission switching device

Claims

A single support bar mounted on a wall, window frame or ceiling via multiple brackets and with a pair of support members attached to both ends, and the pair of support members rotatably mounted vertically spaced apart. The first and second take-up pipes and the first and second shields whose upper edges are fixed to the first and second take-up pipes and which can be unwound to the first and second take-up pipes, respectively. And, the first and second take-up pipes are rotated in the direction of winding the first and second shields on the first and second take-up pipes, respectively, which are built in the first and second take-up pipes. To unwind or wind the first and second shields by rotating the first and second take-up springs and the first and second take-up pipes, respectively, in which the urging force is stored. A single operating chain to be operated and the operating chain provided between the operating chain and the first and second take-up pipes, respectively, and this operating force is applied to the first or second operating chain during a pulling operation to one or the other of the operating chain. A first and second rotation transmission switching device having a clutch function that transmits to the second take-up pipe and does not transmit this operating force to the second or first take-up pipe during the pulling operation to the other or one of the operation chains. And a single pulley around which the operation chain is wound, and the operating force of the operation chain provided between the pulley and the first and second rotation transmission switching devices is applied from the pulley to the first and second rotation transmission switching devices. In a roll screen equipped with a gear train that transmits to a rotation transmission switching device
The first take-up pipe is provided offset to the indoor side or the window side with respect to the second take-up pipe.
The pulley is configured to be located between the first take-up pipe and the second take-up pipe.
A pulley and a gear unit are composed of a gear case containing the gear train and a pulley cover attached to the gear case and accommodating the upper part of the operation chain and the pulley and opening the lower surface and the lower side surface.
A pair of locked portions are formed on the bracket at predetermined intervals from the indoor side to the window side.
A pair of locking portions that can be locked to the pair of locked portions are formed on the support bar, respectively.
The vertical surface passing through the midpoint equidistant from the pair of locking portions and parallel to the wall is defined as the surface X, and the vertical surface including the axis of the first winding pipe and the axis of the second winding pipe are defined as the surface X. When the surface Y is a vertical surface located equidistant from both vertical surfaces with the including vertical surface, the surface X and the surface Y are configured to coincide with each other.
The roll is configured such that the support bar can be attached to the plurality of brackets in a state where the pulley and the gear unit are located on either the right side or the left side of the first and second take-up pipes. screen.

A reinforcing boss is projected from the outer surface of the lower end of the gear case toward the inner surface of the lower end of the pulley cover, a through hole is formed in the pulley cover facing the reinforcing boss, and a screw is inserted into the through hole. The roll screen according to claim 1, wherein the lower end of the pulley cover is fixed to the gear case by screwing into the reinforcing boss.

The roll screen according to claim 2, wherein a soft tubular body formed of a soft resin or a soft rubber is fitted into the reinforcing boss.

When the indoor operating portion and the window-side operating portion of the operating chain that is wound around the pulley and hung from the pulley are located on the window side of the reinforcing boss, the indoor operating portion of the operating chain is said. The roll screen according to claim 2 or 3, which is arranged so as to be located indoors from the reinforcing boss.