JP2018066235A - Roll screen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve both prevention of light leakage from a gap between first and second winding pipes, and enhancement of appearance of a winding upper limit position of a shielding body.SOLUTION: First and second shielding bodies 21 and 22 are wound in a deliverable manner on first and second winding pipes 11 and 12 vertically mounted at an interval on a support member 17 on both ends of a support bar 14. First and second winding springs are energized in a direction so as to wind the first and second shielding bodies on the first and second winding pipes, and an operation member is operated for delivering or winding the first and second shielding bodies. The support bar includes a bar body 14a and a cover 14b, and a lower edge of the cover is positioned lower than a top face of the second winding pipe being the lower of the first and second winding pipes. The first and second shielding bodies being wound on the first and second winding pipes causes first and second weight bars 41 and 42 to come in contact with the other edge of the bar body and the lower edge of the cover, respectively.SELECTED DRAWING: Figure 1

Description

  According to the present invention, the first and second shields can be wound by the biasing force stored in the first and second winding springs built in the first and second winding pipes. The present invention relates to a roll screen that raises and lowers two shields by an operation member.

  Conventionally, two winding pipes are arranged between a pair of side plates, and one end of a shield is connected to each winding pipe so as to be capable of winding and unwinding, and a shield connected to one winding pipe is In the upper winding limit position, the winding upper limit position so as to cover the vertical gap formed between the winding portions of the shield wound around each winding pipe when viewed from the front. Has been disclosed (see, for example, Patent Document 1).

  In the roll screen configured in this way, at the winding upper limit position of the shield connected to one of the winding pipes, the shielding body portion that is not wound on the winding pipe of the shielding body covers the gap. In order to conceal, light leakage from this gap can be prevented. In addition, when the shield connected to one of the winding pipes is connected to the winding pipe so as to be lifted and lowered from the front side so as to be able to be wound and fed, the winding of the shielding body is taken up at the winding upper limit position of the shielding body. The shield part which is not wound around the pipe can play a more balanced role and can improve the design.

Japanese Patent No. 3765996 (Claim 1, paragraph [0008], FIG. 1 and FIG. 2)

  However, in the roll screen shown in the above-mentioned conventional patent document 1, the shield part that is not wound around the winding pipe of the shield at the winding upper limit position of the shield connected to one winding pipe. When there is, the shielding body is wound up halfway, and there is a problem that the appearance of the uncovered shielding body portion is poor.

  The first object of the present invention is to provide a roll screen that can achieve both prevention of light leakage from the gap between the first and second winding pipes and improvement in appearance at the winding upper limit position of the shield. There is. The second object of the present invention is that the roll screen is reversed left and right by the operability at the place where the roll screen is installed, and the cover portion of the support bar is positioned on the window side or on the indoor side. An object of the present invention is to provide a roll screen in which the positions of the shield and the second shield are merely interchanged with each other and the room is not narrowed by the shield. The third object of the present invention is that the first shield is wound around the first winding pipe by the urging force of the first winding spring, and the first weight bar comes into contact with one end edge of the bar body of the support bar. The second shield is wound around the second winding pipe by the urging force of the second winding spring, and the second weight bar hits the lower end edge of the cover portion of the support bar. An object of the present invention is to provide a roll screen capable of absorbing impact and impact sound when touching.

  As shown in FIGS. 1, 5, and 7, the first aspect of the present invention is attached to a wall 15, a window frame or a ceiling via a plurality of brackets 13 and a pair of support members 16, 17 at both ends. A single support bar 14 attached, first and second take-up pipes 11 and 12 attached to a pair of support members 16 and 17 so as to be vertically rotatable, and first and second turns. First and second shields 21 and 22 that are fixed at the upper edges to the take-up pipes 11 and 12 and are wound around the first and second take-up pipes 11 and 12, respectively, and the first and second take-up pipes 11 and 12 for rotating the first and second winding pipes 11 and 12 in the direction of winding the first and second shields 21 and 22 around the first and second winding pipes 11 and 12, respectively. The first and second winding springs 31 and 32 in which the urging force is stored; In a roll screen including an operation member 18 operated to feed or wind the first and second shields 21 and 22 by rotating the two winding pipes 11 and 12 forward or backward, respectively, the support bar 14 is A bar main body 14a provided in parallel with the first and second winding pipes 11 and 12 and locked to the bracket 13, and a cover portion 14b suspended from one side edge of the bar main body 14a. The lower end edge of the portion 14b is configured to be positioned a predetermined distance below the upper surface of the lower second winding pipe 12 of the first and second winding pipes 11 and 12, and the first and second shields When the first and second weight bars 41 and 42 are respectively attached to the lower ends of the bodies 11 and 12, and the first shield 21 is wound around the first winding pipe 11, the first weight bar 41 is moved to the bar body. Hippopotamus out of 14a When the second shield 22 comes into contact with the other end edge opposite to the one end edge from which the portion 14b is suspended and the second shield 22 is wound around the second take-up pipe 12, the second weight bar 42 is attached to the cover portion 14b. It is configured to contact the lower edge.

  The second aspect of the present invention is an invention based on the first aspect, and as shown in FIGS. 1 and 2, the first winding pipe 11 is located on the indoor side or the second winding pipe 12. A pair of locking portions 14c provided offset from the window side, formed with a pair of locked portions 13c, 13d on the bracket 13, and detachably locked to the pair of locked portions 13c, 13d on the bar body 14a. , 14d is formed, a vertical plane passing through a point equidistant from the pair of locking portions 14c, 14d of the bar main body 14a and parallel to the wall 15 is defined as a plane X and includes the axis of the first winding pipe 11 When a vertical plane located equidistant from both vertical planes is defined as a plane Y between the plane and the vertical plane including the axis of the second winding pipe 12, the plane X and the plane Y are configured to coincide with each other. The bar 14 can be attached to the bracket 13 by turning the bar 14 horizontally. And wherein the door.

  3rd viewpoint of this invention is invention based on 2nd viewpoint, Comprising: Furthermore, as shown in FIGS. 1-4, among the bar main bodies 14a, the one end edge on which the cover part 14b was suspended is opposite. A first cushion bar 51 extending along the other end edge and capable of contacting the first weight bar 41 is attached to the other end edge, and extending along the lower end edge to the lower end edge of the cover portion 14b and the second weight. A second cushion bar 52 with which the bar 42 can abut is attached.

  4th viewpoint of this invention is invention based on 1st viewpoint, Comprising: Furthermore, as shown in FIGS. 5-7, an operation member carries out normal rotation or rotation of the 1st and 2nd winding pipes 11 and 12. As shown in FIG. It is characterized by a single operating chain 18 to be reversed.

  A fifth aspect of the present invention is an invention based on the first aspect, and as shown in FIGS. 9 and 10, the operating member is suspended at the center of the lower end of the first shield 21 and the first winding. A first pull operation tool 211 that rotates the pipe 11 forward or backward, and a second pull operation tool 212 that is suspended at the center of the lower end of the second shield 22 and rotates the second winding pipe 12 forward or backward. Features.

  The roll screen according to the first aspect of the present invention is configured such that the lower end edge of the cover portion of the support bar is positioned below the upper surface of the lower second winding pipe among the first and second winding pipes. Therefore, the outdoor light can be prevented from entering the room through the gap between the first and second winding pipes, and the indoor light can be prevented from passing through the gap between the first and second winding pipes. It is possible to prevent leakage from the window to the outside. As a result, light leakage from the gap between the first and second winding pipes can be prevented. When the first shield is wound around the first winding pipe, the first weight bar comes into contact with the other end edge of the bar body, and the second shield is wound around the second winding pipe. Since the second weight bar comes into contact with the lower edge of the cover portion, almost all of the first and second shields are wound around the first and second winding pipes, respectively, at the time of the contact. As a result, the appearance of the first and second shields at the winding upper limit position can be improved. Therefore, it is possible to achieve both prevention of light leakage from the gap between the first and second winding pipes and improvement in appearance at the winding upper limit position of the shield.

  In the roll screen according to the second aspect of the present invention, a vertical plane passing through a point equidistant from the pair of engaging portions of the bar main body and parallel to the wall is defined as a plane X and includes the axis of the first winding pipe. When a vertical plane located equidistant from both vertical planes is defined as a plane Y between the plane and the vertical plane including the axis of the second winding pipe, the plane X and the plane Y are configured to coincide with each other. It is configured so that it can be attached to the bracket by flipping it horizontally, so that the roll screen can be flipped horizontally by removing the pair of locking parts of the bar body from the pair of locked parts of the bracket due to operability at the installation location of the roll screen. When the pair of locking portions of the bar body are locked to the pair of locked portions of the bracket, the cover portion of the support bar moves from the window side to the indoor side or from the indoor side to the window side, but the first shielding The position of the body and the second shield For Re is only replaced, never room is narrowed by the shielding member.

  In the roll screen according to the third aspect of the present invention, since the first cushion bar is attached to the other end edge of the bar body, the first shield is wound around the first winding pipe by the urging force of the first winding spring. The first weight bar comes into contact with one end edge of the bar body of the support bar via the first cushion bar. For this reason, while being able to absorb the impact at the time of the said 1st cushion bar | burr, the impact sound can be absorbed and reduced. Further, since the second cushion bar is attached to the lower edge of the cover portion, the second shield is wound around the second winding pipe by the urging force of the second winding spring, and the second weight bar is the cover of the support bar. The lower end edge of the part is brought into contact with the second cushion bar. For this reason, while being able to absorb the impact at the time of the said 2nd cushion bar, the impact sound can be absorbed and reduced.

It is the sectional view on the AA line of FIG. 7 which shows the roll screen which has the single operation chain of 1st Embodiment of this invention. It is sectional drawing corresponding to FIG. 1 which shows the state which the 1st and 2nd weight bar contact | abutted to the 1st and 2nd cushion bar, respectively. It is the B section expanded sectional view of FIG. It is the A section expanded sectional view of FIG. It is the right view of the roll screen which shows the state which attached the pulley and the gear unit to the right side of the 1st and 2nd winding pipe, and removed the pulley cover from the gear case. It is the left view of the roll screen which shows the state which attached the pulley and the gear unit to the left side of the 1st and 2nd winding pipe, and removed the pulley cover from the gear case. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. It is the FF sectional view taken on the line of FIG. 10 which shows the roll screen which has the 1st and 2nd pull operation tool of 2nd Embodiment of this invention. FIG. 10 is a cross-sectional view corresponding to FIG. 9 illustrating a state in which the first and second weight bars are in contact with the first and second cushion bars, respectively.

  Next, an embodiment for carrying out the present invention will be described with reference to the drawings.

<First Embodiment>
As shown in FIGS. 1, 5, and 7, the roll screen 10 is attached to a wall 15 via two brackets 13 and a single support bar 14 having a pair of support members 16 and 17 attached to both ends. And upper edges of the first and second winding pipes 11 and 12 and the first and second winding pipes 11 and 12 that are rotatably attached to the pair of support members 16 and 17 with a vertical interval therebetween. The first and second shields 21 and 22 fixed, the first and second winding springs 31 and 32 incorporated in the first and second winding pipes 11 and 12, respectively, and the first and second windings. And a single operation member 18 for rotating the take-up pipes 11 and 12 forwardly or reversely.

  As shown in detail in FIGS. 1 and 2, the bracket 13 includes a wall attachment portion 13 a formed in a substantially L shape, and a bar holding portion 13 b attached to the lower surface of the protruding end of the wall attachment portion 13 a. A pair of locked portions 13c and 13d are formed in the bar holding portion 13b with a predetermined interval from the indoor side to the window side. These locked portions 13c and 13d are biased by a spring (not shown) in a direction approaching each other. In this embodiment, the pair of locked portions 13c and 13d are formed in a pair of claws facing each other. The support bar 14 is provided in parallel with the first and second take-up pipes 11 and 12, and is formed with a pair of locking portions 14c and 14d that can be locked to the pair of locked portions 13c and 13d. It has the bar main body 14a and the cover part 14b suspended from one side edge of this bar main body 14a. The pair of locking portions 14c and 14d are formed at a predetermined interval from the indoor side to the window side. Further, in the present embodiment, the pair of locking portions 14c and 14d are formed in a concave groove shape facing in opposite directions. Further, the lower end edge of the cover portion 14b is configured to be positioned below the upper surface of the lower second winding pipe 12 among the first and second winding pipes 11 and 12 by a predetermined distance. Specifically, the lower end edge of the cover portion 14 b is configured to be positioned 1 to 3 mm below the upper surface of the second winding pipe 12.

  On the other hand, the first and second winding pipes 11 and 12 are arranged in parallel to each other, and the first winding pipe 11 is provided offset from the second winding pipe 12 toward the indoor side (FIGS. 1 and 2). ). Specifically, when the roll screen 10 is installed so that the operation chain 18 is positioned on the right side of the first and second winding pipes 11 and 12 (FIG. 7), the first winding pipe 11 is supported by a pair of supports. The second winding pipe 12 is a lower part of the pair of support members 16, 17 and is attached to a position near the indoor side edge of the pair of support members 16, 17. The support members 16 and 17 are attached to positions close to the side edges on the window side (FIGS. 1 and 2). Then, the first shield 21 is suspended from the room-side surface of the first winding pipe 11, and the second shield 22 is suspended from the window-side surface of the second winding pipe 12. Further, as shown in detail in FIG. 2, a vertical plane passing through a point equidistant from the pair of locking portions 14c and 14d of the bar main body 14a and parallel to the wall is defined as a plane X, and the axis of the first winding pipe 11 When a vertical plane located at an equal distance from both vertical planes is defined as a plane Y between a vertical plane including the axis and the vertical plane including the axis of the second winding pipe 12, the plane X and the plane Y are configured to coincide with each other. The support bar 14 can be attached to the bracket 13 by turning it horizontally.

  The first and second take-up springs 31 and 32 include first and second take-up pipes 11 and 12 in a 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 urging force for rotating 12 is each stored (FIG. 7). In this embodiment, the single operating member 18 is a single operating chain, and this operating chain 18 is operated to feed out or wind up the first and second shields 21 and 22, respectively. The First and second weight bars 41 and 42 are attached to the lower ends of the first and second shields 11 and 12, respectively. When the first shield 21 is wound around the first winding pipe 11, the first weight bar 41 is moved to the other end edge of the bar main body 14a opposite to the one end edge where the cover portion 14b is suspended. The second weight bar 42 is configured to come into contact with the lower end edge of the cover portion 14b as the second shield 22 is wound around the second winding pipe 12. Moreover, the 1st cushion bar 51 is attached to the other end edge on the opposite side to the one edge where the cover part 14b was hung down among the bar main bodies 14a (FIGS. 1-3), and the lower end edge of the cover part 14b The second cushion bar 52 on which the second weight bar 42 can come into contact is attached (FIGS. 1, 2, and 4). The first cushion bar 51 is provided so as to extend along the other end of the bar main body 14a, and the first weight bar 41 is configured to contact the first cushion bar 51 (FIG. 2). Further, the second cushion bar 52 is provided so as to extend along the lower end edge of the cover portion 14 b, and the second weight bar 42 is configured to contact the second cushion bar 52. It should be noted that the first end of the bar main body 14a when almost all of the first shield 21 and the other end edge of the bar body 14a opposite to the one end edge where the cover portion 14b is suspended are wound around the first winding pipe 11. The gap with the outer peripheral surface of the winding pipe 11 is formed smaller than the outer diameter of the first weight bar 41. Further, the gap between the lower end edge of the cover portion 14b and the outer peripheral surface of the second winding pipe 12 when almost all of the second shield 22 is wound on the second winding pipe 12 is the second weight bar. It is formed smaller than the outer diameter of 42.

  On the other hand, the roll screen 10 is further wound by the first and second rotation transmission switching devices 61 and 62 provided between the operation chain 18 and the first and second winding pipes 11 and 12, respectively, and the operation chain 18. A single pulley 19 to be hung and a gear train 23 provided between the pulley 19 and the first and second rotation transmission switching devices 61 and 62 are further provided. The gear train 23 includes a drive gear 23 a integrally provided with a single pulley 19, an intermediate gear 23 b that meshes with the drive gear 23 a, and meshes with the intermediate gear 23 b to the first rotation transmission switching device 61. It has the 1st driven gear 23c connected, and the 2nd driven gear 23d meshed with the intermediate gear 23b, and was connected with the 2nd rotation transmission switching device 62 (FIG.5 and FIG.8). The gear train 23 transmits the operation force of the operation chain 18 from the pulley 19 to the first and second rotation transmission switching devices 61 and 62. The gears 23a to 23d are rotatably accommodated in a gear case 24, and the pulley 19 is accommodated in a pulley cover 26 attached to the gear case 24 with screws (not shown). One support member 16 is constituted by the gear case 24 and the pulley cover 26, and the gear case 24 in which the gear train 23 is accommodated, the upper part of the operation chain 18 and the pulley 19 that are attached to the gear case 24, and A pulley and gear unit 27 is constituted by the pulley cover 26 having the lower surface and the lower side surface opened.

  A reinforcing boss 24a projects 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 from the outer surface of the gear case 24 (FIGS. 5, 6, and 8). The pulley cover 26 is formed with a through hole 26a facing the reinforcing boss 24a. The lower end of the pulley cover 26 is fixed to the gear case 24 by inserting a screw 28 through the through hole 26a and screwing it into the reinforcing boss 24a. Thereby, the intensity | strength of the pulley cover 26 lower part is securable. In addition, a soft cylindrical body 29 formed of a soft resin or soft rubber is fitted into the reinforcing boss 24a. Further, when the roll screen 10 is installed so that the operation chain 18 is positioned on the left side of the first and second winding pipes 11 and 12 (FIG. 6), the operation of the operation chain 18 suspended from the pulley 19 on the indoor side is performed. Since the operation part on the window side and the operation part on the window side are located on the window side from the reinforcing boss 24a, the operation part on the indoor side of the operation chain 18 is routed so as to be located on the indoor side from the reinforcement boss 24a. That is, the operation chain 18 is configured to be loosely fitted to the reinforcing boss 24a.

  On the other hand, the first rotation transmission switching device 61 is provided between the operation chain 18 and the first winding pipe 11, and the second rotation transmission switching device 62 is provided between the operation chain 18 and the second winding pipe 12. (FIG. 8). The first rotation transmission switching device 61 transmits this operating force to the first take-up pipe 11 when the operating portion on the indoor side of the operating chain 18 is pulled down in the direction indicated by the solid line arrow in FIG. A clutch function that does not transmit this operating force to the first winding pipe 11 when the operating part on the window side of FIG. The lock function for temporarily fixing the first winding pipe 11 to the position by stopping and the operation part on the indoor side of the operation chain 18 are slightly lowered in the direction shown by the solid line arrow in FIG. And an unlocking function for releasing temporary fixation. That is, the first rotation transmission switching device 41 includes a first clutch portion 71 that exhibits the clutch function, a first stopper portion 81 that exhibits the locking function and the unlocking function, the first intermediate shaft 91 and the first stopper. A relatively small torque is generated between the first intermediate shaft 91 and the first stopper portion 81 when the operation portion provided between the portions 71 is pulled down in the direction indicated by the solid line arrow in FIG. A first torque generator 101. The first intermediate shaft 91 is connected to the first driven gear 23c via the first clutch portion 71.

  Although not shown, the first clutch portion 71 is configured to be rotatable together with the first driven gear 23 c and is formed in a cylindrical shape that is in contact with the outer peripheral surface of the first intermediate shaft 91 and the first clutch outer ring that can be inserted through the first intermediate shaft 91. A plurality of first clutch rollers, a plurality of first roller storage spaces for storing the plurality of first clutch rollers in the first clutch outer ring, and a thin metal spring material formed integrally. And a first clutch leaf spring. The plurality of first clutch rollers move in the circumferential direction of the first clutch outer ring in the plurality of first roller housing spaces, thereby disabling relative rotation of the first intermediate shaft 91 with respect to the first clutch outer ring. Alternatively, the first clutch portion 71 is idled by allowing the first intermediate shaft 91 to rotate relative to the first clutch outer ring. Further, the first stopper portion 81 is configured to slightly lower the operation portion on the indoor side of the operation chain 18 in the direction indicated by the solid line arrow in FIG. 5 so as to switch the first shield 21 to the lowered state or the stopped state. Configured (FIGS. 5 and 8). Specifically, the first stopper portion 81 is inserted into the first torque generating portion 101 and accommodates the first cylindrical cam 81a in which the first cam groove 81b is formed on the outer peripheral surface, and the first cylindrical cam 81a. The first cam case 81c is formed integrally with the gear case 24 at the upper part of the gear case 24 and has a first guide groove 81d extending in the axial direction of the first intermediate shaft 91, and a first cam groove 81b. It has the single 1st rolling element 81e which rolls in the space which overlaps with the 1st guide groove 81d (FIG. 8). Further, the first cam groove 81b is not shown, but the second forward rotation prevention pocket for preventing the other rotation of the first cylindrical cam 81a and the second reverse rotation prevention for preventing the one rotation of the second cylindrical cam 81a. Pocket. Further, the first torque generating unit 101 is inserted into the first intermediate shaft 91 so as to be relatively non-rotatable and the first cylindrical cam 81a is fitted so as to be relatively rotatable, and the first inner ring unit 101a And a first torsion coil spring 101b fitted therein. In this embodiment, the torque between the first cylindrical cam 81a and the first inner ring portion 101a is such that the first winding spring 31 rotates so that the first winding pipe 11 rotates in the direction in which the first shield 21 is wound. It is set to a value that prevents the first shield 21 from being fed out of the first take-up pipe 11 due to the weight of the first shield 21 and the first weight bar 41 in a state of being biased with a constant load.

  The second rotation transmission switching device 62 transmits this operating force to the second winding pipe 12 when the operating part on the window side of the operating chain 18 is pulled down in the direction of the broken arrow in FIG. A clutch function that does not transmit this operating force to the second winding pipe 12 when the inner operating portion is pulled down in the direction indicated by the solid line arrow in FIG. 5, and a broken line arrow in FIG. A lock function for temporarily fixing the second winding pipe 12 to the position by stopping the pulling operation in the direction indicated by, and the operation part on the window side of the operation chain 18 in the direction indicated by the broken line arrow in FIG. A lock release function for releasing the temporary fixation by operating. That is, the second rotation transmission switching device 62 includes a second clutch portion 72 that exhibits the clutch function, a second stopper portion 82 that exhibits the locking function and the unlocking function, a second intermediate shaft 92 and a second stopper. A second torque is generated between the second intermediate shaft 92 and the second stopper portion 82 when the operation portion on the window side of the operation chain 18 provided between the portions 82 is pulled down in the direction indicated by the broken arrow in FIG. 2 torque generator 102 (FIG. 8). The second intermediate shaft 92 is connected to the second driven gear 23d via the second clutch portion 72.

  Although not shown, the second clutch portion 72 is configured to rotate together with the second driven gear 23 d and is configured to be rotatable with a second clutch outer ring through which the second intermediate shaft 92 can be inserted, and a columnar shape in contact with the outer peripheral surface of the second intermediate shaft 92. The plurality of second clutch rollers, the plurality of second clutch accommodating spaces for accommodating the plurality of second clutch rollers in the second clutch outer ring, and a thin metal spring material are integrally molded. And a second clutch leaf spring. The plurality of second clutch rollers move in the circumferential direction of the second clutch outer ring within the plurality of second roller housing spaces, thereby disabling relative rotation of the second intermediate shaft 92 with respect to the second clutch outer ring. Alternatively, the second intermediate shaft 92 is configured to rotate relative to the second clutch outer ring so that the second clutch portion 72 is idled. Further, the second stopper portion 82 is configured to switch the second shield 21 to the lowered state or the stopped state by slightly lowering the operation portion on the window side of the operation chain 18 in the direction indicated by the dashed arrow in FIG. (FIGS. 5 and 8). Specifically, the second stopper portion 82 accommodates a second cylindrical cam 82a that is fitted into a second torque generating portion 102 described later and has a second cam groove 82b formed on the outer peripheral surface thereof, and the second cylindrical cam 82a. A second cam case 82c formed integrally with the gear case 24 at the lower portion of the gear case 24 and formed with a second guide groove 82d extending in the axial direction of the second intermediate shaft 92; And a second rolling element 82e that rolls in a space where 82b and the second guide groove 82d overlap (FIG. 8). In addition, the second cam groove 82b is not shown, but the second forward rotation prevention pocket for blocking the other rotation of the second cylindrical cam 82a and the second reverse rotation prevention for blocking one rotation of the second cylindrical cam 82a. Pocket. Further, the second torque generating portion 102 is inserted into the second intermediate shaft 92 so as to be relatively non-rotatable and the second cylindrical cam 82a is fitted so as to be relatively rotatable, and the second inner ring portion 102a. And a second torsion coil spring 102b fitted therein. In this embodiment, the torque between the second cylindrical cam 82a and the second inner ring portion 102a is such that the second winding spring 32 rotates so that the second winding pipe 12 rotates in the direction in which the second shield 22 is wound. It is set to a value that prevents 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 42 in a state of being biased with a constant load. The first cam case 81c is rotatably fitted with a first cylindrical body 111 into which one end of the first take-up pipe 11 can be fitted, and the second cam case 82c is fitted with a second take-up pipe. The 2nd cylinder 112 which can be fitted to one end of 12 is inserted so that rotation is possible (Drawing 7 and Drawing 8).

  On the other hand, a first torque limiter 121 is provided between the first rotation transmission switching device 61 and the first winding pipe 11, and between the second rotation transmission switching device 62 and the second winding pipe 12. A second torque limiter 122 is provided in which the rotational direction in which torque is generated is opposite to that of the first torque limiter 121 (FIG. 8). The first torque limiter 121 and the second torque limiter 122 are formed in the same shape. The first and second torque limiters 121 and 122 are interposed between the outer ring portion 123, the inner ring portion 124 inserted into the outer ring portion 123 so as to be relatively rotatable, and between the outer ring portion 123 and the inner ring portion 124, and are predetermined. A torque generating portion 126 that generates a torque of a value, and a clutch portion 127 that allows relative rotation of the inner ring portion 123 to one side with respect to the outer ring portion 124 and prevents relative rotation to the other.

  The first torque limiter 121 is accommodated in a first limiter case 131 formed integrally with the first cylinder 111, and the front end surface of the first limiter case 131 is closed by a first limiter cap 141 (see FIG. 7 and FIG. 7). FIG. 8). As a result, the outer ring portion 123 is fixed to the first winding pipe 11 and the inner ring portion 124 is connected to the first rotation transmission switching device 61. The second torque limiter 122 is accommodated in a second limiter case 132 formed integrally with the second cylinder 112, and the front end surface of the second limiter case 132 is closed by a second limiter cap 142. As a result, the outer ring portion 123 is fixed to the second winding pipe 12 and the inner ring portion 124 is connected to the second rotation transmission switching device 62.

  The torque generator 126 includes an inner ring portion 124 that is fitted to the output shaft 128 so as to be relatively rotatable and an outer ring portion 123 is fitted so as to be relatively rotatable, and a torsion coil spring 129 that is fitted to the inner ring portion 124 (see FIG. 8). The output shaft 128 of the first torque limiter 121 slides on the first intermediate shaft 91 by sliding with respect to the first stopper portion 81 of the first rotation transmission switching device 61 and the first intermediate shaft 91 of the first torque generating portion 101. The first intermediate shaft 91 is configured to be relatively rotatable with respect to the first intermediate shaft 91. The output shaft 128 of the second torque limiter 122 slides on the second intermediate shaft 92 by sliding with respect to the second stopper portion 82 of the second rotation transmission switching device 62 and the second intermediate shaft 92 of the second torque generating portion 102. The second intermediate shaft 92 is connected so as not to be rotatable relative to the second intermediate shaft 92.

  As shown in FIG. 8, the clutch portion 127 includes the inner ring portion 124 fitted into the output shaft 128, a plurality of cylindrical rollers 133 in contact with the outer peripheral surface of the output shaft 128, and a plurality of rollers 133. Each having a roller accommodating space 130 and a leaf spring (not shown) formed by integrally molding a thin metal spring material. When the output shaft 128 rotates in the direction in which the first shield 21 is extended, the clutch portion 127 of the first torque limiter 121 transmits the rotation of the output shaft 128 to the outer ring portion 123, and the output shaft 128 becomes the first shield. When rotating in the winding direction, the rotation of the output shaft 128 is not transmitted to the outer ring portion 123. Therefore, contrary to the above, the rotation in the direction in which the first shield 21 is pulled out from the first winding pipe 11 by gripping the first weight bar 41 at the lower end of the first shield 21 is transmitted to the output shaft 128. Instead, the rotation in the direction of winding the first shield 21 around the first winding pipe 11 from the first shield 21 side is transmitted to the output shaft 128. On the other hand, when the output shaft 128 rotates in the direction in which the second shield 22 is extended, the clutch portion 127 of the second torque limiter 122 transmits the rotation of the output shaft 128 to the outer ring portion 123, and the output shaft 128 When the shield 22 is rotated in the winding direction, the rotation of the output shaft 128 is configured not to be transmitted to the outer ring portion 123. Therefore, contrary to the above, the rotation in the direction in which the second shield 22 is pulled out from the second winding pipe 12 by gripping the second weight bar 42 at the lower end of the second shield 22 is transmitted to the output shaft 128. Instead, rotation in the direction of winding the second shield 22 around the second winding pipe 12 from the second shield 22 side is transmitted to the output shaft 128.

  The operation of the roll screen 10 configured in this way will be described. As shown in FIGS. 1, 5, and 7, the roll screen 10 is installed so that the operation chain 18 is positioned on the right side of the first and second winding pipes 11, 12, that is, the pulley and gear unit 27. In the state where the roll screen 10 is installed so that is positioned on the right side of the first and second winding pipes 11 and 12, the pair of engaging portions 14c and 14d of the bar main body 14a is connected to the pair of engaged members of the bar holding portion 13b. The support bar 14 is attached to the two brackets 13 and 13 by being locked to the stop portions 13c and 13d. In this state, when the operation portion on the indoor side of the operation chain 18 is operated to be pulled down in the direction indicated by the solid line arrow in FIG. It is transmitted to the first rotation transmission switching device 61. In the first rotation transmission switching device 61, the rotational force of the first driven gear 23c in the direction indicated by the solid line arrow in FIG. 5 is the output of the first clutch portion 71, the first intermediate shaft 91, and the first torque limiter 121. It is transmitted to the shaft 128. At this time, since the torque acting on the first torque limiter 121 is less than a predetermined value, the rotational force of the output shaft 128 of the first torque limiter 121 is the clutch portion 127 of the first torque limiter 121, the torque generating portion 126, the first torque limiter 121. This is transmitted to the first take-up pipe 11 via the limiter case 141 and the first cylindrical body 111, and the first shield 21 is fed out from the first take-up pipe 11. When the operation of lowering the operation chain 18 is stopped, the first shield 21 is temporarily fixed at the position by the lock function of the first rotation transmission switching device 61. Note that, when the operation unit on the indoor side of the operation chain 18 is pulled down in the direction indicated by the solid line arrow in FIG. 5, this operating force is transmitted to the second rotation transmission switching device 62, but the second rotation transmission switching device 62 Since the second clutch portion 72 runs idle, it is not transmitted to the second winding pipe 12.

  Next, when the operating part on the indoor side of the operating chain 18 is slightly pulled down in the direction indicated by the solid line arrow in FIG. 5 and then released from the operating chain 18, the first rolling element 81 e becomes the first forward rotation prevention pocket. The first winding pipe 11 is rotated in the winding direction of the first shield 21 by the urging force stored in the first winding spring 31. At this time, the rotation of the first winding pipe 11 in the winding direction of the first shield 21 causes the first stopper via the first torque limiter 121, the output shaft 128, the first intermediate shaft 91, and the first torque generator 101. Since the first rolling element 81e reaches the right end of the first guide groove 81d, the first stopper 81 and the first torque generator 101 slide to the left, and the first rolling element 81e slides to the left. Housed in one slide pocket (not shown), the first stopper portion 81 and the first torque generating portion 101 reach the left end of the first cam case 81c. For this reason, since the output shaft 128 can rotate relative to the first intermediate shaft 91, the first shield 21 is continuously wound around the first winding pipe 11 by the urging force of the first winding spring 31. The first weight bar 41 comes into contact with the other end edge of the bar body 14a of the support bar 14 via the first cushion bar 51 and stops. Thereby, while being able to absorb the impact at the time of the said 1st cushion bar 51, it can absorb and reduce the impact sound. Note that the operation chain 18 and the drive gear 23a are kept stopped when the first shield 21 is wound. In addition, the second shield 22 is wound around the second winding pipe 12 by the urging force of the second winding spring 12, and the second weight bar 42 is attached to the lower end edge of the cover portion 14 b of the support bar 14 at the second cushion bar. Abutting via 52. Thereby, while the 2nd cushion bar 52 can absorb the impact at the time of the above-mentioned contact, it can absorb and reduce the impact sound.

  On the other hand, the lower end edge of the cover portion 14b of the support bar 14 is positioned below the upper surface of the lower second winding pipe 12 of the first and second winding pipes 11 and 12 by a predetermined distance. Even if the incident outdoor light tries to enter the room through the gap between the first and second take-up pipes 11 and 12, it is shielded by the cover portion 14 b, and the indoor light is the first and second light. Even if an attempt is made to leak from the window through the gap between the winding pipes 11 and 12 to the outside, the cover portion 14b shields it. As a result, light leakage from the gap between the first and second winding pipes 11 and 12 can be prevented. Further, as described above, when the first shield 21 is wound around the first winding pipe 11, the first weight bar 41 is brought into contact with the other end edge of the bar body 14a via the first cushion bar 51. When the second shield 22 is wound around the second winding pipe 12, the second weight bar 42 comes into contact with the lower end edge of the cover portion 14b via the second cushion bar 52. Sometimes almost all of the first and second shields 21, 22 are wound on the first and second winding pipes 11, 12, respectively. As a result, the appearance of the first and second shields 21 and 22 at the upper winding position can be improved. Therefore, it is possible to achieve both prevention of light leakage from the gap between the first and second winding pipes 11 and 12 and improvement of the appearance of the first and second shields 21 and 22 at the upper winding position.

  The support bar 14 is removed from the two brackets 13 and 13 from the state in which the roll screen 10 is installed so that the operation chain 18 is positioned on the right side of the first and second winding pipes 11 and 12 (FIGS. 1 and 5). The pair of bar main bodies 14a is installed in a state where the roll screen 10 is reversed so that the operation chain 18 is positioned on the left side of the first and second winding pipes 11 and 12 (FIG. 6). The supporting portions 14c and 14d are locked to the pair of locked portions 13c and 13d of the bar holding portion 13b, and the support bar 14 is attached to the brackets 13 and 13. At this time, a vertical plane passing through a point equidistant from the pair of locking portions 14c and 14d of the bar main body 14a and parallel to the wall 15 is defined as a plane X, and the vertical plane including the axis of the first winding pipe 11 and the second Since the vertical plane located at the same distance from both vertical planes between the vertical plane including the axis of the winding pipe 12 is defined as the plane Y, the plane X and the plane Y coincide with each other. 14 does not contact the wall mounting portion 13 b or the wall 15 of the bracket 13. Moreover, although the cover part 14b of the support bar 14 shifts from the window side to the indoor side or from the indoor side to the window side by the left-right reversal, the first shield 21 is suspended at the position of the second shield 22 and the second shield. Since the body 22 hangs down to the position of the first shield 21, that is, the positions of the first shield 21 and the second shield 22 are interchanged with each other, the first and second shields 21 and 22 The room is never narrowed. Further, when the roll screen 10 is installed such that the roll blind 10 is reversed left and right so that the operation chain 18 is positioned on the left side of the first and second winding pipes 11 and 12 (FIG. 6). Light leakage from the gap between the two take-up pipes 11 and 12 can be prevented by the cover portion 14b of the support bar 14 located on the indoor side from the first and second take-up pipes 11 and 12.

<Second Embodiment>
9 and 10 show a second embodiment of the present invention. 9 and 10, the same reference numerals as those in FIGS. 1 and 2 denote the same components. In this embodiment, the operation member includes a first pull operation tool 211 suspended from the lower end center of the first shield 21 and a second pull operation tool 212 suspended from the lower end center of the second shield 22. Have. The first pull operation tool 211 is fitted in the center in the longitudinal direction of the first weight bar 41 so that the first winding pipe 11 can be rotated forward or backward by operation of the first pull operation tool 211. Yes. The second pull operation tool 212 is fitted in the center of the second weight bar 42 in the longitudinal direction, and is configured to rotate the second winding pipe 12 forward or backward by operation of the second pull operation tool 212. In addition, the first and second rotation transmission switching devices of the relatively complicated mechanism of the first embodiment, the first and second torque limiters, and the gear train are replaced with the first and second mechanisms of a relatively simple mechanism. Two clutches 221 and 222 are used. The first clutch 221 is operated by the first pull operation tool 211 in a state where the urging force of the first winding spring 13 is acting on the first winding pipe 11 in the direction in which the first shielding body 21 is wound. When 21 is slightly lowered and released, rotation of the first winding pipe 11 in the winding direction due to the urging force of the first winding spring 31 is prevented, and the first winding pipe 11 moves in the winding direction. When the first shield 21 is slightly pulled down by the first pull operation tool 211 in the state where the rotation is blocked and the hand is released, the first winding pipe 11 is wound in the winding direction by the urging force of the first winding spring 31. Is configured to be switchable so as to allow rotation of Further, the second clutch 222 is secondly operated by the second pull operation tool 212 in a state where the urging force of the second winding spring 32 is acting on the second winding pipe 12 in the direction in which the second shield 22 is wound. When the shield 22 is slightly pulled down and released, rotation of the second winding pipe 12 in the winding direction due to the urging force of the second winding spring 32 is prevented and the winding direction of the second winding pipe 12 is prevented. When the second shield 22 is slightly pulled down by the second pull operation tool 212 in the state where the rotation of the second winding member 212 is prevented, the second winding pipe 22 is wound by the urging force of the second winding spring 32. It is configured to be switchable to allow rotation in the direction. The configuration other than the above is the same as that of the first embodiment.

  The operation of the roll screen 210 configured as described above will be described. As shown in FIG. 9, the pair of locking portions 14c and 14d of the bar main body 14a are locked to the pair of locked portions 13c and 13d of the bar holding portion 13b, so that the support bar 14 is fixed to the two brackets 13 and 13 as shown in FIG. Install to. In a state where the first pull operation tool 211 is pulled down to a desired height, if the first shield 21 is slightly pulled down by the first pull operation tool 211 and released, the first clutch 221 is moved to the first winding spring 31. Since the rotation of the first winding pipe 11 in the winding direction due to the urging force is prevented, the first shield 21 is temporarily fixed at a desired height. In this state, that is, in a state in which the first winding pipe 11 is prevented from rotating in the winding direction, the first clutch 221 is released by slightly pulling down the first shield 21 with the first pull operation tool 211. Allows the first winding pipe 11 to rotate in the winding direction by the urging force of the first winding spring 31, so that the first winding pipe 11 is moved by the urging force stored in the first winding spring 31. The first shield 21 rotates in the winding direction, and the first weight bar 41 comes into contact with the other end of the bar body 14a of the support bar 14 via the first cushion bar 51 and stops. Thereby, while being able to absorb the impact at the time of the said 1st cushion bar 51, it can absorb and reduce the impact sound. In addition, the second shield 22 is wound around the second winding pipe 12 by the urging force of the second winding spring 12, and the second weight bar 42 is attached to the lower end edge of the cover portion 14 b of the support bar 14 at the second cushion bar. Abutting via 52. Thereby, while the 2nd cushion bar 52 can absorb the impact at the time of the above-mentioned contact, it can absorb and reduce the impact sound.

  On the other hand, in a state where the roll blind 210 is reversed left and right, the pair of locking portions 14c and 14d of the bar main body 14a is locked to the pair of locked portions 13c and 13d of the bar holding portion 13b, and the support bar 14 is moved. Attach to brackets 13 and 13. At this time, a vertical plane passing through a point equidistant from the pair of locking portions 14c and 14d of the bar main body 14a and parallel to the wall 15 is defined as a plane X, and the vertical plane including the axis of the first winding pipe 11 and the second Since the vertical plane located at the same distance from both vertical planes between the vertical plane including the axis of the winding pipe 12 is defined as the plane Y, the plane X and the plane Y coincide with each other. 14 does not contact the wall mounting portion 13 b or the wall 15 of the bracket 13. Since the operation other than the above is substantially the same as the operation of the first embodiment, repeated description will be omitted.

  In the first and second embodiments, the first and second winding pipes are rotatably attached to the wall via the pair of support members, the support bar, and the bracket. The winding pipe may be rotatably attached to the window frame or the ceiling via a pair of support members, a support bar, and a bracket.

DESCRIPTION OF SYMBOLS 10,210 Roll screen 11 1st winding pipe 12 2nd winding pipe 13 Bracket 13c, 13d Locked part 14 Support bar 14a Bar main body 14b Cover part 14c, 14d Locking part 15 Wall 16, 17 Support member 18 Operation Chain (operation member)
21 1st shielding body 22 2nd shielding body 31 1st winding spring 32 2nd winding spring 41 1st weight bar 42 2nd weight bar 51 1st cushion bar 52 2nd cushion bar 211 1st pull operation tool (operation Element)
212 Second pull operation tool (operation member)

Claims (5)

A single support bar attached to a wall, window frame or ceiling via a plurality of brackets and having a pair of support members attached to both ends, and attached to the pair of support members so as to be vertically spaced apart The first and second winding pipes, and the first and second shields having upper edges fixed to the first and second winding pipes, respectively, are wound around the first and second winding pipes so as to be fed out. And rotating the first and second take-up pipes in the direction of winding the first and second shields around the first and second take-up pipes, respectively, incorporated in the first and second take-up pipes. For feeding or winding the first and second shields by rotating the first and second winding springs and the first and second winding pipes, each of which stores the biasing force for rotation, in the forward and reverse directions, respectively. In a roll screen provided with an operating member to be operated,
The support bar includes a bar body provided in parallel with the first and second winding pipes and locked to the bracket; and a cover portion suspended from one side edge of the bar body;
The lower end edge of the cover portion is configured to be positioned below a predetermined distance from the upper surface of the lower second winding pipe among the first and second winding pipes,
First and second weight bars are attached to lower ends of the first and second shields, respectively.
When the first shield is wound around the first winding pipe, the first weight bar comes into contact with the other end edge of the bar body opposite to the one end edge where the cover portion is suspended. ,
The roll screen is configured such that when the second shield is wound around the second winding pipe, the second weight bar comes into contact with a lower end edge of the cover portion. The first winding pipe is provided offset to the indoor side or the window side with respect to the second winding pipe;
A pair of locked portions are formed on the bracket,
A pair of locking portions that are detachably locked to the pair of locked portions are formed on the support bar,
A vertical plane passing through a point equidistant from the pair of locking portions of the bar body and parallel to the wall is defined as a plane X, and the vertical plane including the axis of the first winding pipe and the second winding pipe When a vertical plane located equidistant from both vertical planes between the vertical plane including the axis is defined as plane Y, the plane X and the plane Y are configured to coincide with each other,
The roll screen of Claim 1 comprised so that attachment to the said bracket was carried out by reversing the said support bar right and left. A first cushion bar extending along the other end edge and capable of contacting the first weight bar is attached to the other end edge of the bar body opposite to the one end edge where the cover portion is suspended,
The roll screen according to claim 2, wherein a second cushion bar extending along the lower end edge and capable of abutting against the second weight bar is attached to a lower end edge of the cover portion.   2. The roll screen according to claim 1, wherein the operation member is a single operation chain for rotating the first and second winding pipes forward or backward.   The operating member is suspended at the center of the lower end of the first shield, and the first pull operating tool for rotating the first winding pipe in the normal direction or the reverse direction; and the second winding is suspended at the center of the lower end of the second shield. The roll screen according to claim 1, further comprising: a second pull operation tool that rotates the take-up pipe forward or backward.

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