Roll screen device

Abstract

To provide a roll screen device allowing a take-up box to be mounted close to a fitting such as a window and a door even if the fitting has a handle projecting to the indoor side, and having excellent operability of an operation cord.SOLUTION: A roll screen device 1 includes a frame body having a take-up box 4 and a vertical frame member 5 hanging downward from the end of the take-up box in the longitudinal direction, a take-up shaft 3 rotatably supported in the take-up box around an axis L1, a screen 2 which can be taken up and fed out with respect to the take-up shaft, a guide rail 7 for vertically guiding the side end of a screen, and an operation cord 15 which is wound around a pulley 14 connected to the take-up shaft in the take-up box and rotates the take-up shaft. The guide rail is arranged at the end of the frame body on the indoor side in the depth direction, the frame body has a lead-out port 20 which opens on the front surface facing the indoor side, and the operation cord 15 is led out from the frame body to the indoor side through the lead-out port 20.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to a roller blind device in which a screen can be wound up or unwound from a winding shaft by manually operating an operating cord to rotate the winding shaft. [Background technology]

[0002] A roll screen device is known in which a screen can be wound up or unwound from a winding shaft by rotating the winding shaft by manually operating an operating cord. For example, Patent Document 1 discloses a roll screen device in which a sprocket (pulley) is provided at one end of a winding shaft supported by a winding box, an operating cord is hung around the sprocket, and the screen is unwound or wound by rotating the operating cord in the forward and reverse directions. Meanwhile, in the device described in Patent Document 1, a guide rail that is fixed to the side frame and guides both left and right ends of the screen in the up-down direction is disposed at a position closer to the outside of the room on the underside of the winding box. This creates a space on the indoor side, and the operating cord can be operated by utilizing the space. However, this type of roll screen device is generally attached to the indoor side of fittings such as windows and doors that are attached to building openings. However, if the fittings have protrusions toward the indoor side, such as handles for opening and closing, the screen that moves up and down along the guide rails interferes with the protrusions, so the winding box could not be attached close to the fittings. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-106191 A Summary of the Invention [Problem to be solved by the invention]

[0004] To provide a roll screen device that can attach a winding box close to fittings such as windows and doors even if the fittings have protruding parts such as handles that protrude into the room, and that has an easy-to-operate operating cord. [Means for solving the problem]

[0005] In order to solve the above-mentioned problems, the present invention provides a roll screen device having a frame body having a winding box as a horizontal frame member for attachment to the upper end of a building opening, and a vertical frame member hanging down from the longitudinal end of the winding box, a winding shaft supported within the winding box so as to be freely rotatable around its axis, a screen having one end fixed to the winding shaft and the other end led out from the winding box to the outside, and capable of being wound up and unwound from the winding shaft by rotation of the winding shaft, and an operating cord that is hung around a pulley connected to the winding shaft within the winding box and rotates the winding shaft, wherein the vertical frame member is located at the end of the winding box on the indoor side in the depth direction perpendicular to the longitudinal direction, and the frame body has an outlet that opens to a front surface facing the indoor side, and is configured so that the operating cord is led out from the frame body to the indoor side through the outlet.

[0006] In the present invention, the outlet may be open to the front surface of the winding box, and the operating cord may be configured to be led out to the indoor side through the outlet. In addition, the winding box may have a pull-out opening that opens at the end of the lower surface of the winding box facing the interior of the room, and the operating cord may be configured to be pulled out through the pull-out opening into the vertical frame member and then led out to the interior of the room through the lead-out opening that opens at the front surface of the vertical frame member. In this case, it is desirable that the operating cord, which is led out from the outlet of the vertical frame member to the inside of the room, be re-introduced into the vertical frame member through an inlet opened below the outlet, and then be operably engaged with the vertical frame member by a cord holding member.

[0007] In the present invention, a gear wheel connected to the winding shaft and a gear pulley having a gear portion meshed with the gear wheel and a pulley portion around which the operating cord is wound are provided within the winding box, and the gear pulley may be arranged closer to the front of the winding box than the gear wheel. In this case, it is preferable that the axis of the gear pulley is arranged horizontally relative to the axis of the gear wheel.

[0008] In the present invention, a first gear pulley having a first gear portion and a first pulley portion and connected to the winding shaft, and a second gear pulley having a second gear portion and a second pulley portion meshed with the first gear portion and arranged on the front side of the winding box relative to the first gear pulley are provided within the winding box, and the operating cord is wound around the second pulley portion of the second gear pulley, and an outdoor operating cord led out from the underside of the winding box on the outdoor side relative to the vertical frame member may be wound around the first pulley of the first gear pulley. In this case, it is preferable that the axis of the second gear pulley is disposed horizontally relative to the axis of the first gear wheel.

[0009] In the present invention, it is preferable that the operating cord is in the form of an endlessly connected loop, and that two string-like portions constituting the operating cord are led out from the lead-out outlet to the inside of the room. It is also preferable that a screen outlet for inserting and removing the screen into and from the inside of the winding box is opened along the longitudinal direction of the winding box at the front end of the underside of the winding box, and that a turning member for hanging the screen unwound from the winding shaft and guiding the screen downward extends along the longitudinal direction above the screen outlet inside the winding box. In this case, the vertical frame member holds a guide rail that guides in the vertical direction the side end of the screen that is unwound from the winding shaft and led out to the outside, and it is more desirable that the upper end of the guide rail extend through the screen lead-out outlet of the winding box to directly below the turning member inside the winding box.

[0010] In the present invention, it is preferable that one of the two string-like portions, which rotates in the direction in which the screen is wound up relative to the winding shaft, is provided with an identification mark for distinguishing it from the other string-like portion. In this case, it is preferable that the identification mark is in a color different from that of the operation code. Effect of the Invention

[0011] To provide a roller blind device according to the present invention, in which the take-up box can be attached close to fittings such as windows and doors even if the fittings have protruding parts such as handles that protrude into the room, and further, the operating cord is easy to operate. [Brief description of the drawings]

[0012] [Figure 1] 1 is a front view showing an embodiment of a roller screen device according to the present invention. [Diagram 2] FIG. 2 is a front view showing the roller blind device with a part cut away; [Diagram 3] FIG. 2 is a horizontal cross-sectional view of the winding box. [Figure 4] FIG. [Diagram 5] FIG. 2A is a partially enlarged cross-sectional view showing one end of the winding box, and FIG. 2B is a cross-sectional view taken along line II in FIG. [Figure 6] FIG. 2 is an exploded perspective view showing a coupled state of an end cap and a pulley box in the winding box. [Figure 7] FIG. 2 is an exploded perspective view showing an operating mechanism and a winding force adjusting mechanism of the roller screen device. [Figure 8]FIG. 4 is a side cross-sectional view of the roller screen device, showing a schematic diagram of an operating mechanism in a pulley box. [Figure 9] FIG. 2 is a side cross-sectional view of the above-mentioned roller screen device, and shows a schematic diagram of a state in which the screen is fully wound around the winding shaft in the winding box. [Figure 10] FIG. 2 is an exploded perspective view of the winding force adjustment mechanism. [Figure 11] 11 is a perspective view showing a state in which the winding force adjustment mechanism is housed in the gear cover. FIG. [Figure 12] 4 is an enlarged view of a main portion showing the relative positions of a rotor, a brake spring, and a biasing force adjusting piece in the winding force adjusting mechanism. FIG. [Figure 13] FIG. 2 is a perspective view showing the outer surface side of the pulley box. [Figure 14] 10 is a side view showing a state in which a gear cover is attached to the outer surface side of the pulley box. FIG. [Figure 15] A front view showing the bracket attached to the side frame of a building opening. [Figure 16] FIG. 16 is an enlarged cross-sectional side view of a main portion of FIG. [Figure 17] 16 is an enlarged horizontal cross-sectional view of a main part of FIG. 15 as seen from the bottom side. [Figure 18] FIG. 11 is an enlarged cross-sectional side view showing a schematic diagram of a state in which the winding box is being attached to the bracket. [Figure 19] FIG. 4 is an enlarged cross-sectional side view showing a schematic diagram of a state in which a winding box is attached to a bracket. [Figure 20] FIG. 20 is an enlarged view of a main part of FIG. 19. [Figure 21] FIG. 11 is a side sectional view showing a first modified example of the operating mechanism in the roller screen device, and is a schematic view of the operating mechanism in the pulley box. [Figure 22] FIG. 13 is an exploded perspective view of the operation mechanism in the first modified example. [Figure 23] FIG. 11 is a side sectional view showing a second modified example of the operating mechanism in the roller screen device, and is a schematic view of the operating mechanism in the pulley box. [Figure 24] FIG. 10 is a side sectional view illustrating a third modified example of the roller screen device, and is a schematic view of an operating mechanism in the pulley box. [Diagram 25] FIG. 11 is a perspective view showing a fourth modified example of the roller blind device, illustrating a state in which the operating cord, which has been pulled out from the storage space of the vertical frame member to the indoor side, is stored again in the storage space. [Figure 26] FIG. 26 is a cross-sectional view of a main part of FIG. 25. [Figure 27] 13 is a plan view showing the state in which the guide member is attached to the opening of the vertical frame member. FIG. [Figure 28] 13 is an exploded perspective view showing a cord retaining member that accommodates the operating cord pulled out into the interior of the vehicle into the accommodation space. FIG. [Figure 29] FIG. 13 is a cross-sectional view showing a sixth modified example of the roller screen device, showing a state in which the screen is unwound from the winding box. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] An embodiment of a roller screen device according to the present invention will be described below with reference to Figures 1 to 20. The roller screen device 1 of this embodiment is a vertical-opening type screen device, and includes a winding box 4 as a horizontal frame member for mounting to the upper end of a building opening, a frame body 100 having vertical frame members 5, 5 hanging downward from the left and right ends in the longitudinal direction of the winding box 4, the winding shaft 3 supported within the winding box 4 so as to be rotatable about a horizontal axis L1, and a screen 2 having one end fixed to the winding shaft 3 and the other end led out from the winding box 4 to the outside, and capable of being wound up and unwound from the winding shaft 3 by the rotation of the winding shaft 3.

[0014] Engagements such as slide fasteners are attached to the left and right side edges of the screen 2, and the engagement elements are slidably engaged in slits 7a of guide rails 7 held by the vertical frame members 5, 5, so that when opening or closing, the screen 2 is movable up and down along the vertical frame members 5, 5. As described above, the one end (upper end) of the screen 2 is attached to the winding shaft 3, while the other end (lower end) of the screen 2 is attached to a movable crosspiece 8 that has a function of opening and closing and a function as a weight.

[0015] 4, the vertical frame member 5 has a first frame portion 5a that holds the guide rail 7 and a hollow second frame portion 5b having an internal storage space S, and the first frame portion 5a and the second frame portion 5b are joined to form an L-shape. An opening portion 5c that opens to the indoor side in the depth direction and extends in the vertical direction is formed in the second frame portion 5b, and the indoor space and the storage space S communicate with each other through the opening portion 5c.

[0016] As shown in Fig. 5, the winding shaft 3 has a winding shaft body 3a formed in a hollow cylindrical shape to which one end of the screen 2 is fixed, and a winding cap 3b fixedly attached to both ends of the winding shaft body 3a at least around the axis L1. The winding cap 3b has a circular tubular portion 3c fixedly fitted from the tip to the winding shaft body 3a, a circular flange portion 3d connected to the base end of the tubular portion 3c and extending outward in the axis L1 direction, with the tip side protruding radially outward, and an elongated rectangular tubular portion 3e connected to the base end of the circular tubular portion 3c radially inward from the flange portion 3d and extending outward in the axis L1 direction. The rectangular tubular portion 3e has a rectangular cross section and a support hole 3f penetrating in the axis L direction at its center. A winding mechanism is connected to both ends of the winding shaft 3, which accumulates a rotational biasing force that rotates the winding shaft 3 in the direction of winding up the screen 2 by rotating the winding shaft 3 about the axis L1 accompanying the unwinding of the screen 2.

[0017] The winding mechanism includes a winding spring 9 made of a coil spring arranged on the axis L1, a spring receiver 6 fixedly fitted around the axis L1 to the winding shaft body 3a at the center of the winding shaft body 3a in the axis L1 direction, and a spring shaft 10 rotatably inserted at the end of the winding shaft body 3a in the axis L1 direction into a support hole 3f of the winding cap 3b from inside the winding shaft body 3a toward the outside. In the winding shaft body 3a, one end of the spring material of the winding spring 9 is fixed to the spring receiver 6, and the other end of the spring material of the winding spring 9 is fixed to the base end side of the spring shaft 10. Furthermore, the tip of the spring shaft 10 led outward from the winding shaft body 3a through the support hole 3f of the winding cap 3b is supported by a rotor 52 in a winding force adjustment mechanism described later.

[0018] The winding box 4 has a hollow box body 11 having a rectangular cross-sectional shape and extending horizontally, and end caps 12 provided on both ends of the box body 11. As shown in Figures 5 and 6, fixing pieces 12a for fixing the end caps 12 to the box body 11 are provided at the four corners of the end caps 12, and the box body 11 and the end caps 12 are fixed by inserting the fixing pieces 12a into the ends of the box body 11 and screwing them in place.

[0019] 9, a screen outlet 13 extending horizontally is opened along axis L1 on the bottom surface of the box body 11, and when the winding shaft 3 housed in the winding box 4 rotates about axis L1, the screen 2 wound around the winding shaft 3 is unwound from the screen outlet 13 or wound around the winding shaft 3. At this time, the screen outlet 13 is disposed at the indoor side end of the winding box 4, and correspondingly, the guide rail 7 held by the vertical frame member 5 is disposed at the indoor side end of the bottom surface of the winding box 4.

[0020] 2, 3 and 9, a turning member 24 extending along the longitudinal direction of the winding box 4 is provided inside the box body 11 of the winding box 4. The turning member 24 is composed of a turning roller 24a around which the screen 2 unwound from the winding shaft 3 is wound to guide the screen 2 downward, and a support base 24b that supports the turning roller 24a from below to prevent the turning roller 24a from bending, and the turning roller 24a is located directly above the screen outlet 13. By providing the turning member 24, the screen 2 turned downward by the turning roller 24a is prevented from sliding against the opening edge of the screen outlet 13, and further, by extending the guide rail 7 to the inside of the winding box 3 through the screen outlet 13 as shown in FIG. 9, the screen 2 is led in and out of the winding box 4 more stably.

[0021] At both ends of the winding box 4 (outside the axis L1 direction of the end cap 12), an operating mechanism for introducing and withdrawing the screen 2 into and from the winding box 4 is provided. As shown in Figs. 7 and 8, the operating mechanism has a pulley 14 as a rotation transmitting body connected to the winding shaft 3, and an endless loop-shaped flexible operating cord 15 wound around the pulley 14, and the pulley 14 and the operating cord 15 are held in a pulley box 16 described later. The pulley box 16 is attached to the end cap 12 by being fastened together with an end plate 17 that closes its inner surface side. The spring shaft 10 inserted into the square cylindrical portion 3e of the winding cap 3b and the support hole 3f thereof is extended into the pulley box 16 through a cylindrical portion 12b formed in the end cap 12 and a through hole 17a that penetrates the end plate 17 in the plate thickness direction. At this time, the square cylindrical portion 3e is It is inserted into the cylindrical portion 12b so as to be rotatable about the axis L1.

[0022] The pulley 14 has a rectangular hole 14a formed in a rectangular cross section at its center, and the tip of the square cylindrical portion 3e is fitted into the rectangular hole 14a, so that the winding shaft 3 and the pulley 14 are integrally connected around the axis L1. That is, when the pulley 14 rotates, the winding cap 3b, the winding shaft body 3a, and the spring receiver 6 simultaneously rotate around the axis L1 with respect to the spring shaft 10, which is fixed to the winding box 4. The pulley 14 is integrally formed with a pair of flange portions 14b, 14c arranged at both ends in the direction of the axis L1, and an engagement gear 14d sandwiched between the flange portions 14b, 14c and formed with a smaller diameter than the flange portions 14b, 14c. The operating cord 15 is wound around the engagement gear 14d.

[0023] 5 and 7, the operation cord 15 is made of an endless ball chain in which a large number of balls 15a formed in a substantially spherical shape (in this embodiment, the long side cross section is elliptical and the short side cross section is circular) are connected to each other at equal intervals by connecting strips 15b, and is configured to have flexibility as a whole. When the operation cord 15 is suspended from the winding box 4, if one of the two string-like parts formed between the upper and lower folds is pulled against the elastic spring force (i.e., the rotational biasing force) around the axis L1 of the winding spring 9, the pulley 14 rotates to one side in the circumferential direction due to the engagement between the engagement gear 14d and the balls 15a of the operation cord 15, and together with the weight of the movable crosspiece 8, the screen 2 is unwound from the winding shaft 3. On the other hand, when the other of the two string-like members of the operating cord 15 is pulled, the pulley 14 similarly rotates in the other circumferential direction, and in combination with the rotational biasing force accumulated in the winding spring 9, the screen 2 is wound up around the winding shaft 3. The roller blind device 1 can also be provided with a known locking means for holding the screen 2 in a desired extended state.

[0024] As shown in Figures 5, 7 and 8, the pulley box 16 has a base 18 formed in a plate shape with a rectangular appearance in a plan view, an accommodation section 19 for the pulley 14 formed by an outer peripheral wall 22 rising from the base 18 toward the winding shaft 3 side so as to surround the axis L1 on the inner side of the pulley box 16, a pair of outlets 20 opening on the front surface facing the indoor side of the pulley box 16, and a pair of connecting passages 21 connecting the accommodation section 19 and the pair of outlets 20. The operating cord 15 wound around the engagement gear 14d of the pulley 14 in the accommodation section 19 is led out from the pair of outlets 20 to the indoor side through the pair of connecting passages 21.

[0025] The accommodation section 19 is for rotatably accommodating the pulley 14 as described above, and has an outer peripheral wall 22 erected in an annular shape about the axis L1, and an annular inner peripheral wall 23 erected concentrically with the outer peripheral wall 22. The height of the inner peripheral wall 23 from the base 18 is lower than the height of the outer peripheral wall 22 from the base 18. The shaft portion on one side (the winding shaft 3 side) of the pulley 14 is rotatably supported by the through hole 17a of the end plate 17, and the shaft portion on the other side (the pulley box 16 side) is rotatably supported by the inner peripheral wall 23.

[0026] According to the above-mentioned roller blind device 1, the guide rail 7 held by the vertical frame member 5 is positioned at the end on the indoor side in the depth direction, and an outlet 20 for leading the operating cord 15 to the indoor side is opened on the front side of the winding box 4 facing the indoor side. Therefore, even if a fitting such as a window or door has a handle that protrudes into the indoor side, the winding box 4 can be attached close to the fitting, without impairing the operability of the operating cord 15.

[0027] The winding force adjusting mechanism will now be described. 10 to 12, the winding force adjustment mechanism is disposed on the outer surface side of the pulley box 16, and includes a brake fitting portion 50 fixedly attached to the winding box 4, a brake spring 51 formed of a coil spring made of a spring material having a first end 51a and a second end 51b on the opposite side thereof, and fitted to the brake fitting portion 50 with a fitting force that prevents the brake spring 51 from rotating in the circumferential direction, and a rotor 52 that engages with the first end 51a of the spring material forming the brake spring 51 or the second end 51b of the spring material in the circumferential direction of the brake spring 51 in a direction to reduce the diameter of the brake spring 51. The brake fitting portion 50, the brake spring 51, the rotor 52, and an outer ring member 56 described later are aligned on the axis L1.

[0028] The brake fitting portion 50 is formed in a cylindrical shape, and is provided integrally with a gear cover 60 for covering the winding force adjustment mechanism from the outside on the outer surface side of the pulley box 16. As shown in Fig. 13, a cover mounting groove 16a for positioning and fixing the gear cover 60 is provided on the outer surface side of the base 18 of the pulley box 16, and the gear cover 60 is fixed by screws while being engaged with the cover mounting groove 16a. In an initial state where the brake spring 51 is not elastically deformed, the inner diameter of the brake spring 51 is smaller than the outer diameter of the brake fitting portion 50. Therefore, the brake spring 51 is fitted onto the brake fitting portion with its wound diameter expanded, and is fixed to the brake fitting portion 50 by an elastic restoring force that tries to reduce the diameter to its original diameter.

[0029] The rotor 52 has a circular small diameter protrusion 52a arranged on one end side in the direction of the axis L1 and a large diameter protrusion 52b arranged on the other end side and having a diameter larger than the small diameter protrusion 52a. As shown in Fig. 5, the small diameter protrusion 52a is inserted into the brake fitting portion 50 and supported rotatably, and the large diameter protrusion 52b is inserted into a rotor opening 16b opened in the cover mounting groove 16a of the pulley box 16 and supported rotatably. The large diameter protrusion 52b has a recessed groove 52c into which the shaft end 10a at the tip of the spring shaft 10 is fixedly fitted around the axis L1. That is, the rotor 52 rotates together with the spring shaft 10.

[0030] The rotor 52 has a convex portion 52d extending in a circumferential direction within a predetermined angle range on the outer periphery of the large diameter convex portion 52b in the middle portion in the axis L1 direction, and a notch portion 53 is formed between both ends of the convex portion 52d in the circumferential direction. A first surface 53a and a second surface 53b facing each other are formed at both circumferential ends of the notch portion 53, i.e., at both circumferential ends of the convex portion 52d. The first end 51a and the second end 51b of the brake spring 51 are disposed between the first surface 53a and the second surface 53b. In this embodiment, the rotor 52 is constantly engaged with the first end 51a of the brake spring 51 by the rotational biasing force of the winding spring 9 as shown in FIG. 12, and biases the brake spring 51 in the diameter contracting direction, i.e., in the direction of winding the brake spring 51.

[0031] Further, the winding force adjustment mechanism includes a biasing force adjustment piece 54 that is rotatably provided in the circumferential direction with respect to the brake spring 51 and the rotor 52 and can be selectively engaged with the first end 51a or the second end 51b in the circumferential direction of the brake spring 51, and an operation part 55 for rotating the biasing force adjustment piece 54. The biasing force adjustment piece 54 is disposed outside the rotor 52 and is provided on the inner surface of the annular outer ring member 56 that surrounds the rotor 52 and is connected to the operation part 55. The biasing force adjustment piece 54 is disposed between the first end 51a and the second end 51b of the brake spring 51 in the notch part 53. Then, by the rotation of the outer ring member 56 accompanying the operation of the operation part 55, the biasing force adjustment piece 54 can be selectively engaged with the first end 51a or the second end 51b, and biased in the radial expansion direction of the brake spring 51, i.e., in the direction of unwinding the brake spring 51.

[0032] By such an operation, as described later in detail, the fitting force of the brake spring 51 with respect to the brake fitting portion 50 is reduced, and the brake spring 51 is allowed to rotate with respect to the brake fitting portion 50. Then, the brake spring 51 rotates around the axis L1 together with the biasing force adjustment piece 54, and further, the biasing force adjustment piece 54 presses the first surface 53a of the rotor 52 together with the first end portion 51a of the brake spring 51 in the direction A in FIG. 12 around the axis L1, or presses the second surface 53b of the rotor 52 together with the second end portion 51b of the brake spring 51 in the direction B, thereby allowing the rotor 52 and the spring shaft 10 to rotate around the axis L1. As a result, the magnitude of the rotational biasing force in the winding direction of the screen 2 by the winding spring 9 acting on the winding shaft 3 can be appropriately adjusted according to the unwinding length of the screen 2.

[0033] The outer ring member 56 has a drive gear 56a having a plurality of gear teeth provided at equal angular intervals on its outer circumference. On the other hand, the operating unit 55 has a plurality of transmission gears 55a, 55b, 55c, 55d made of spur gears that mesh with the drive gear 56a of the outer ring member 56 to transmit a rotational force around the axis line L1 to the outer ring member 56. The transmission gears 55a-55d have different rotation axes, and these rotation axes are aligned in a straight line parallel to the axis line L1. An even number of the transmission gears 55a-55d are arranged, and in this embodiment, a total of four are arranged. One end of the rotation axis of the transmission gears 55a-55d is rotatably supported by a plurality of circular holes 61 opened in the gear cover 60, and the other end is rotatably supported by a plurality of gear openings 16c opened in the cover mounting groove 16a of the pulley box 16.

[0034] Further, the transmission gears 55a-55d have a concave outer engagement groove 57 on one end surface of the rotating shaft (the gear cover 60 side), and the transmission gears 55a-55d can be rotated in conjunction with each other by engaging the tip of a flathead screwdriver with the outer engagement groove 57. Since the outer engagement groove 57 faces the outside through the circular hole 61 of the gear cover 60, for example, before the winding box 4 is attached to an opening in a building, the transmission gears 55a-55d can be rotated from the outside of the winding box 4 to adjust the rotational biasing force of the winding spring 9.

[0035] The transmission gears 55a-55d are also formed with an inner engagement groove 58 that can be engaged with a flathead screwdriver on the end face of the other end side (pulley box 16 side) of the rotating shaft. However, among the transmission gears 55a-55d, except for the transmission gear (referred to as the "outermost transmission gear") 55d that is connected farthest from the outer ring member 56, the inner surface side of the pulley box 16 is blocked by the end cap 12, so that these inner engagement grooves 58 cannot be seen from the inside of the winding box 4.

[0036] The outermost transmission gear 55d has a rotating shaft 59 supported by the pulley box 16, which extends into the box body 11 of the winding box 4 through the opening 17b in the end plate 17 and the opening 12c in the end cap 12, and the inner engagement groove 58 faces the inside of the box body 11. As a result, even after the roller screen device 1 is attached to an opening in a building, the outermost transmission gear 55d can be rotated from inside the winding box 4 to adjust the rotational biasing force of the winding spring 9. In addition, the outermost transmission gear 55d is disposed radially outward of the axis L1 from the outer diameter of the screen 2 when it is fully wound around the winding shaft 3, so that it does not interfere with the screen 2 when it is rotated from inside the winding box 4. In addition, the number of teeth of the transmission gears 55a-55d is smaller than the number of teeth of the drive gear 56a of the outer ring member 56 (i.e., the diameter of the transmission gears 55a-55d is smaller than the diameter of the drive gear 56a of the outer ring member 56), thereby reducing the operating load when rotating the transmission gears 55a-55d.

[0037] When adjusting the rotational force of the winding spring 9, the tip of a flat-head screwdriver is engaged with the outer engagement groove 57 of any of the transmission gears 55a-55d from the outside of the winding box 4, or the tip of a flat-head screwdriver is engaged with the inner engagement groove 58 of the outermost transmission gear 55d from the inside of the winding box 4, and the transmission gears 55a-55d are rotated, thereby transmitting a rotational force around the axis L1 to the outer ring member 56.

[0038] For example, when the rotational biasing force is to be increased, the operating portion 55 is operated to rotate the outer ring member 56 in one direction around the axis L1 (the direction of the arrow A in FIG. 12), and the biasing force adjustment piece 54 is engaged with the first end 51a of the brake spring 51, and the first end 51a is pressed in a direction that increases the circumferential angle formed by the second end 51b and that loosens the winding of the brake spring 51 to expand its diameter. This reduces the fitting force of the brake spring 51 with respect to the brake fitting portion 50, and allows the brake spring 51 to rotate around the axis L1. This brings the biasing force adjustment piece 54 into a state in which it is engaged with both the first end 51 of the brake spring 51 and the first surface 53a of the rotor 52. Then, by further rotating the outer ring member 56, the rotor 52 and the spring shaft 10 connected thereto rotate together with the outer ring member 56, and as a result, the winding spring 9 is wound up and its rotational biasing force is increased.

[0039] After the winding spring 9 has been adjusted to an appropriate rotational biasing force in this manner, the flathead screwdriver is removed from the outer engagement groove 57 or the inner engagement groove 58. This causes the first surface 53a of the rotor 52 to engage with the first end 51a of the brake spring 51 by the rotational biasing force in the rewinding direction of the winding spring 9, and the brake spring 51 is wound up and reduced in diameter in a direction that reduces the circumferential angle formed by the first end 51 and the second end 51b. Then, the fitting force of the brake spring 51 to the brake fitting portion 50 is increased, and the brake spring 51 is fitted to the brake fitting portion 50 with a fitting force that does not allow the brake spring 51 to rotate about the axis L1. As a result, the rotor 52 and the spring shaft 10 connected thereto are prevented from rotating, and the spring shaft 10 is fixed to the winding box 4, completing the adjustment of the rotational biasing force of the winding spring 9.

[0040] On the other hand, when the rotational biasing force is to be reduced, the operating portion 55 is similarly operated to rotate the outer ring member 56 in the other direction around the axis L1 (the direction of the arrow B in FIG. 12), whereby the biasing force adjustment piece 54 is engaged with the second end 51b of the brake spring 51, and the second end 51b is pressed in a direction that increases the circumferential angle formed with the first end 51a and unwinds the brake spring 51 to expand its diameter. This reduces the fitting force of the brake spring 51 with respect to the brake fitting portion 50, and allows the brake spring 51 to rotate around the axis L1. This brings the biasing force adjustment piece 54 into a state in which it is engaged with both the second end 51b of the brake spring 51 and the second surface 53b of the rotor 52. Then, by further rotating the outer ring member 56, the rotor 52 and the spring shaft 10 connected thereto rotate together with the outer ring member 56, thereby loosening the winding of the winding spring 9 and reducing its rotational biasing force.

[0041] Similarly, in this case, when the flathead screwdriver is removed from the outer engagement groove 57 or the inner engagement groove 58, the first surface 53a of the rotor 52 is engaged with the first end 51a of the brake spring 51 by the rotational biasing force in the rewinding direction of the winding spring 9, the brake spring 51 is wound up again, and the brake spring 51 is fitted into the brake fitting portion 50 with a fitting force that does not allow the brake spring 51 to rotate about the axis L1. As a result, the rotation of the rotor 52 and the spring shaft 10 connected thereto is prevented, and the spring shaft 10 is fixed to the winding box 4, completing the adjustment of the rotational biasing force of the winding spring 9.

[0042] In addition, in the above-mentioned roller screen device 1, the rotational biasing forces of the winding springs 9, 9 arranged on both the left and right sides can be adjusted individually by winding force adjustment mechanisms arranged on both the left and right sides. However, if the rotational biasing forces of the left and right winding springs 9, 9 are different, there is a risk that twisting will occur in the winding shaft 3, causing the screen 2 to not be wound evenly around the winding shaft 3. Therefore, it is desirable to adjust the rotational biasing forces of the left and right winding springs 9, 9 to be equal.

[0043] Next, a mounting structure of the winding box 4 to the building opening in this embodiment will be described. 15 to 17, the building opening is formed by an upper horizontal frame 71 that defines its upper end, and a pair of side frames 72, 72 that hang down from both ends of the upper horizontal frame 71 and have inner faces that face each other in the width direction. A pair of brackets 73, 73 are attached to the inner faces of the upper ends of the side frames 72, 72 of the building opening, and are configured to support both ends of the winding box 4 in the direction of the axis L1.

[0044] Each pair of brackets 73, 73 has a fixed wall 74 fixed to the inner surface of the side frame 72, a lower support wall 76 erected from the fixed wall 74 toward the inside of the building opening and extending in the depth direction, and a rear support wall 77 erected from the fixed wall 74 toward the inside of the building opening and extending in the vertical direction. The fixed wall 74 is a rectangular plate in a plan view that is long in one direction, and is fixed to the side frame 72 with screws 78 in a position where the longitudinal direction is aligned along the vertical direction. The upper end of this fixed wall 74 abuts against the inner surface of the upper horizontal frame 71.

[0045] The lower support wall 76 is provided on the lower end edge of the fixed wall 74 and extends over the entire width (depth) of the fixed wall 74. The length of the lower support wall 76 in the depth direction is smaller than the length of the pulley box 16 in the depth direction. On the other hand, the rear support wall 77 is provided on the side edge of the fixed wall 74 on the exterior side in the depth direction and extends over the entire length (vertical direction) of the fixed wall 74. The vertical length of the rear support wall 77 is approximately the same as or slightly larger than the height of the pulley box 16. Furthermore, the heights of the lower support wall 76 and the rear support wall 77 in the erection direction are equal. In addition, a locking hole 76a is opened on the interior side of the lower support wall 76 in the depth direction, and this locking hole 76a and a locking claw 80 (see Figure 18) provided on the winding box 4 side that locks into the locking hole 76a form a locking mechanism that restricts movement of the winding box 4 in the depth direction.

[0046] The pair of brackets 73, 73 support the pulley box 16 disposed at both ends of the winding box 4. As shown in Fig. 13 and Fig. 20, the lower surface of the pulley box 16 is provided with the locking claw 80 that is locked in the locking hole 76a, and the locking claw 80 has a plate-shaped portion 81 whose base end is supported by the lower surface of the pulley box 16 and is elastically deformable in the vertical direction, and a mountain-shaped (triangular in cross section) locking portion 82 that is provided at the tip of the plate-shaped portion 81 and protrudes downward. The plate-shaped portion 81 is formed by a cantilever leaf spring whose base end is integrally connected to and supported by the lower surface of the pulley box 16 and extends along the lower surface toward the end of the pulley box 16 on the indoor side. As shown in Figure 20, the locking portion 82 has an inclined portion 82a formed with a downward slope from the outside side of the room to the inside side in the depth direction, and a hook portion 82b extending approximately vertically upward from the lower tip of the inclined portion 82a and locking to the opening edge of the locking hole 76a.

[0047] As shown in Figures 1, 18 and 19, an L-shaped metal fitting 83 is provided on the upper surface of the box body 11 of the winding box 4, one piece of which is fixed to the box body 11 and the other piece of which rises upward and has a circular hole 83a (see Figure 2) for inserting a screw. With the winding box 4 supported by a pair of brackets 73, 73, it is screwed to the front end of the upper horizontal frame 71 through the circular hole 83a.

[0048] When attaching the winding box 4 of the roller blind device 1 to the pair of brackets 73, 73, the lower end of the pulley box 16 in the winding box 4 is supported on the lower support wall 76 of the brackets 73, 73, and the winding box 4 is pushed toward the outside of the room. Before the rear end (outside end) of the pulley box 16 abuts against the rear support wall 77 of the pair of brackets 73, 73, the inclined surface 82a of the locking claw 82 rides up on the front edge of the lower support wall 76, the plate-shaped portion 81 elastically deforms upward, and the lower end of the locking portion 82 (the intersection line between the inclined portion 82a and the hook portion 82b) rises to the same height as the lower surface of the pulley box 16. Furthermore, when the winding box 4 is pushed in and the rear end of the pulley box 16 abuts against and is supported by the rear support wall 77, the hook portion 82b of the locking claw 82 reaches the opening edge of the locking hole 76a, the plate-shaped portion 81 elastically returns, and the locking claw 80 is locked in the locking hole 76a, completing the installation of the winding box 4.

[0049] When the installation is complete, both ends of the winding box 4 are clamped between the lower support wall 76 of the pair of brackets 73, 73 and the upper horizontal frame 71 in the vertical direction, restricting movement in the vertical direction, and in the depth direction, movement in the depth direction is restricted by the rear support wall 77 and the locking mechanism. On the other hand, when removing the winding box 4 from the pair of brackets 73, 73, the locking claws 80 locked in the locking holes 76a are pushed upward from the underside of the lower support wall 76 using a tool such as a screwdriver to release the locked state, and the winding box 4 can be pulled out to the inside of the room. In this way, the winding box 4 is configured to be easily attached to or removed from the building opening.

[0050] 21 to 28 show various modified examples of the operating mechanism in the roller blind device. In the following description of the modified examples, the description of the same contents as those in the above embodiment will be omitted. In the roller blind device 1A of the first modification shown in FIG. 21, the pulley box 16 has a first storage section 26 in which a first gear pulley 25 (gear wheel) rotating around an axis L1 is stored, and a second storage section 28 formed on the room side (front side) in the depth direction from the first storage section 26 and in which a second gear pulley 27 (gear pulley) meshing with the first gear pulley 25 is stored. Note that a rectangular hole 14a is opened in the center of the first gear pulley 25 as in the above embodiment (see FIG. 22), and the tip of the square tube upper part 3e is fitted into this rectangular hole 14a. Note that in this embodiment, the same one as the first gear pulley 25 is used as the second gear pulley 27, but the rectangular hole of the second gear pulley is not used.

[0051] The first housing portion 26 has an outer peripheral wall 29 that is erected annularly about the axis L1, and an inner peripheral wall 30 that is erected annularly inside the outer peripheral wall 29 and has the same center as the outer peripheral wall 29. The second housing portion 28 has an outer peripheral wall 31 that is erected annularly about the rotation axis L2 of the second gear pulley 27, and an inner peripheral wall 32 that is erected annularly inside the outer peripheral wall 31 and has the same center as the outer peripheral wall 31. The first housing portion 26 and the second housing portion 28 are communicated with each other at the portion where the outer peripheral walls 29, 31 of the first housing portion 26 and the second housing portion 28 overlap, whereby the first gear pulley 25 and the second gear pulley 27 are engaged with each other.

[0052] The first and second gear pulleys 25, 27 are integrally formed by gear flanges 25a, 27a (gear parts) arranged on the winding shaft 3 side in the axis line L1, L2 direction, circular flanges 25b, 27b arranged on the pulley box 16 side opposite to the winding shaft 3, and engagement gears 25c, 27c (pulley parts) sandwiched between the gear flanges 25a, 27a and the circular flanges 25b, 27b and formed with a smaller diameter than the flanges 25a, 25b, 27a, 27b. The gear flanges 25a, 27a of the first and second gear pulleys 25, 27 have a plurality of gear teeth on their outer circumferences at equal angular intervals, and are meshed with each other as described above. The operating cord 15 is wound around the engagement gear 27c of the second gear pulley 27. However, in this embodiment, the engagement gear 25c of the first gear pulley 25 is not used.

[0053] Also in this modification, as in the above embodiment, the shaft portion on one side (the winding shaft 3 side) of the first gear pulley 25 is rotatably supported by the through hole 17a penetrating the end plate 17 attached to the end cap 12, and the shaft portion on the other side (the pulley box 16 side) is rotatably supported by the inner peripheral wall 30. Similarly to the first gear pulley 25, the shaft portion on one side of the second gear pulley 27 is rotatably supported by the through hole 17c penetrating the end plate 17 and disposed adjacent to the through hole 17a, and the shaft portion on the other side is rotatably supported by the inner peripheral wall 32. In this modification, the axis L2 of the second gear pulley 27 is horizontally disposed on the indoor side in the depth direction with respect to the axis L1 of the first gear pulley 25.

[0054] Furthermore, the pulley box 16 in this modification also has a pair of outlets 20 that open on the front surface of the pulley box 16 facing the indoor side, and a pair of connecting paths 21 that connect the second storage section 28 to the pair of outlets 20. The operating cord 15 that is wound around the engagement gear 27c of the second gear pulley 27 in the second storage section 28 is led out from the pair of outlets 20 to the indoor side through the pair of connecting paths 21. In this way, when the operating cord 15 is operated, the operating force is transmitted from the second gear pulley 27 to the first gear pulley 25, so that the winding shaft 3 is rotated and the screen 2 is led in and out of the winding box 4. In this modification, the second gear pulley 27 around which the operating cord 15 is wound is disposed in a position closer to the indoor side, so that the operating cord 15 can be operated more smoothly.

[0055] The operation cord may be led out not only to the indoor side but also to the outdoor side. Fig. 23 shows a roller blind device 1B equipped with the second modified operation mechanism. In this modified example, the second gear pulley 27 is accommodated in the second storage section 28, and the first storage section 26 also accommodates the same first gear pulley 25 as the second gear pulley, as in the first modified example. In this modified example, the outdoor side operation cord 15A is wound around the engagement gear 25c of the first gear pulley 25, and the indoor side operation cord 15 is wound around the engagement gear 27c of the second gear pulley 27, as in the first modified example.

[0056] Similarly to the first modified example, the pulley box 16 in this modified example has a pair of outlets 20 opening on the front surface of the pulley box 16 facing the indoor side, and a pair of connecting paths 21 connecting the second storage section 28 to the pair of outlets 20. The indoor side operation cord 15 looped around the engagement gear 27c of the second gear pulley 27 in the second storage section 28 is led out from the pair of outlets 20 to the indoor side through the pair of connecting paths 21. In this way, when the operation cord 15 is operated on the indoor side, the operating force is transmitted from the second gear pulley 27 to the first gear pulley 25, causing the winding shaft 3 to rotate, and the screen 2 is led in and out of the winding box 4.

[0057] Furthermore, the pulley box 16 in this modification has a pair of outer outlets 35 that open at a position on the lower surface of the pulley box 16 that is closer to the outside of the room than the vertical frame member 5, and a pair of connecting paths 36 that connect the first storage section 26 to the pair of outer outlets 35. The outdoor operation cord 15A that is looped around the engagement gear 25c of the first gear pulley 25 is led out from the pair of outer outlets 35 to the outside of the room through the pair of connecting paths 36. In this way, when the operation cord 15A led out to the outside of the room is operated on the outside of the room, the winding shaft 3 rotates with the rotation of the first gear pulley 25, and the screen 2 is led in and out of the winding box 4. According to this second modification, since the operation cords 15, 15A are led out to both the inside and outside of the room, the screen 2 can be led in and out of the winding box 4 from either the inside or outside of the room.

[0058] Figure 24 shows a roller blind device 1C of the third modified example, which is similar to the second modified example in that the same first and second gear pulleys 25, 27 are housed in the first and second storage sections 26, 28. However, this third modified example differs from the second modified example in that the indoor side operating cord 15, which is looped around the engaging gear 27c of the second gear pulley 27 in the second storage section 28, is led out from the bottom surface of the winding box 4 to the indoor side.

[0059] The pulley box 16 in this modification also has a pair of outer outlets 35 opening at a position on the outer side of the vertical frame member 5 on the lower surface of the pulley box 16, and a pair of connecting passages 36 connecting the first storage section 26 and the pair of outer outlets 35. In addition, the pulley box 16 has a pair of draw-out openings 37 opening at the indoor end of the lower surface of the pulley box 16, and a pair of connecting passages 38 connecting the pair of draw-out openings 37 and the second storage section 28. Here, the pair of draw-out openings 37 are located directly above the storage space S in the vertical frame member 5 (second frame section 5b), and the indoor operation cord 15 is stored in the storage space S from the pair of draw-out openings 37 through the connecting passages 38. The operation cord 15 can be operated through the opening 5c ​​opening on the indoor side of the vertical frame member 5. That is, in this example, the opening 5c ​​of the vertical frame member 5 plays the role of the outlet 20 that leads the operation cord 15 to the indoor side. Therefore, in this modified example, in order to facilitate operation of the operating cord 15 from inside the room, it is desirable that the opening width of the opening 5c ​​be large enough that the operating cord 15 can be pulled out by hand from within the storage space S to the outside through the opening 5c.

[0060] In the second and third modified examples, the first gear pulley 25 and the second gear pulley 27 have the same structure and diameter, but they may have different structures or diameters as necessary. For example, the central rectangular hole of the second gear pulley 27 can be omitted, and in the second modified example, the engagement gear 25c of the first gear pulley 25 can be omitted. Also, by making the diameters of the first gear pulley 25 and the second gear pulley 27 different, the operating force of the indoor operating cord 15 can be adjusted.

[0061] Furthermore, in the case where the operating cord 15 is led out from within the winding box 4 into the storage space S of the vertical frame member 5 as in the third modified example, the following configuration can also be adopted. 25 to 28 show a roller blind device 1D of a fourth modified example. In this fourth modified example, as in the third modified example, the operation cord can be led out to both the indoor and outdoor sides, or, in the third modified example, the outdoor side operation cord 15A can be omitted and the operation cord 15 can be led out only to the indoor side. Therefore, the configuration inside the winding box 4 (pulley box 16) will be omitted and the configuration related to the vertical frame member 5 will be mainly described here.

[0062] In the fourth modified example, the operation cord 15 is accommodated in the storage space S of the vertical frame member 5 from the draw-out opening 37 and once led out to the outside from the opening 5c ​​as the lead-out opening 20 in the vertical frame member 5, and is configured to be accommodated again in the storage space S through the opening 5c ​​as the inlet 39 opened below the lead-out opening 20. Specifically, the second frame portion 5b of the vertical frame member 5 is provided with an outlet member 40 for leading the operation cord 15 from the storage space S to the inside of the room through the opening 5c ​​as the lead-out opening 20, and a cord holding member 41 for operably retaining the operation cord 15 once led out to the inside of the room by the outlet member 40 in a state where the operation cord 15 is introduced again into the storage space S through the opening 5c ​​as the lead-out opening 39 below the outlet member 40, relative to the second frame portion 2b.

[0063] The lead-out member 40 has a cover 40a formed in an elongated mountain shape extending in the vertical direction so as to cover a part of the opening 5c ​​of the vertical frame member 5 and protrude forward toward the indoor side, and a pair of legs 40b, 40b to be pressed into the opening 5c, and locking claws 40c, 40c facing each other are formed on the outer sides of the tips of the pair of legs 40b, 40b. When the lead-out member 40 is attached to the opening 5c, the legs 40b, 40b are pushed into the storage space S from the opening 5c. Then, the inclined surface of the locking claw 40c abuts against the tip of the opening 5c, and the legs 40b, 40b are elastically deformed inward. When the inclined surface of the locking claw 40c passes through the opening 5c, the legs 40b, 40b elastically return to their original state, and the locking claw 40c is locked to the opening 5c, and the lead-out member 40 is attached to the vertical frame member 5.

[0064] The cord holding member 41 is arranged within the storage space S and has a guide wheel 41a around which the operating cord 15 is wound, a pair of support plates 41b, 41b arranged within the storage space S and supporting the guide wheel 41a from both sides, an axle portion 41c of the guide wheel 41a suspended between the pair of support plates 41b, 41b, a lever 41d arranged on the front side of the vertical frame member 5, and a guide groove 41e provided between the pair of support plates 41b, 41b and the lever 41d, which engages with an opening 5c ​​of the vertical frame member 5 to guide the vertical movement of the cord holding member 41.

[0065] The cord holding member 41 is fixed at an appropriate position in the vertical direction of the vertical frame member 5 by fastening a screw fastening portion 41f having a screw hole and a receiving piece 41g arranged in the storage space S together with a screw 42, and the vertical position can be adjusted by loosening these fastenings. The lever 41d can be used for this adjustment. The cord holding member 41 is configured so that the operating cord led out to the indoor side is smoothly returned into the storage space S by the guide wheel 41a rotating about its axis as the operating cord 15 is operated. According to this fourth modified example, for example, the operating cord 15 can be extended into the room at the upper side of the vertical frame member 5 and stored within the storage space S of the vertical frame member 5 at the lower side, thereby placing the operating cord 15 in a position out of reach of children.

[0066] In the fourth modified example, the vertical middle parts of both of the pair of operation cords 15 housed in the storage space S of the vertical frame member 5 from the draw-out opening 37 of the winding box 4 are led out from the storage space S to the indoor side through the opening 5c ​​as the lead-out opening 20 by the lead-out member 40, but this is not necessarily limited to this. For example, the middle part of only one of the pair of operation cords 15 may be led out to the indoor side by the lead-out member 40, and the other may be placed in the storage space S up to its lower end, and the lower end parts of the pair of operation cords 15 connected to each other may be hung around the cord holding member 41. By doing so, for example, by pulling up one operation cord 15 led out to the indoor side upward, the screen 2 is unrolled and expanded from the winding shaft 3, and by pulling down the other operation cord 15, the expanded screen 2 can be wound up on the winding shaft 3, and there is no risk of mistaking the operation direction of the operation cord 15 for unrolling and winding the screen 2.

[0067] In the above-described embodiment, when the screen 2 is unwound from the winding shaft 3 and in a state where the building opening is completely closed (i.e., the movable frame 8 is located at the lowest end of the building opening), when the screen 2 is wound up on the winding shaft 3, there is a risk that, of the two string-like portions 15c, 15d of the operating cord 15 leading out from the outlet 20 of the winding box 4 to the inside of the room, the string-like portion 15c to be operated when winding up the screen 2 may be selected incorrectly. Therefore, as shown in Fig. 29, of these string-like portions 15c, 15d, the string-like portion 15c to be operated when winding up the screen 2 (one of the string-like portions 15c) may be provided with an identification mark 45 to indicate that it is the string-like portion to be operated.

[0068] In this embodiment, the identification mark 45 is a color applied to the string-like portion 15c, and this color is preferably a color different from the color of the operation cord 15. The identification mark 45 may be provided on any part or all of the string-like portion 15c, for example, on the upper or lower part of the string-like portion 15c, or on the entire region from the upper end to the lower end of the string-like portion 15c. In this case, when the screen 2 is wound around the winding shaft 3 and the building opening is open, the identification mark 45 may be provided so as to move to the other string-like portion 15d side, or when the building opening is half-opened by winding the screen 2, the identification mark 45 may be provided at least on the string-like portion 15c side. In this way, by providing the identification mark 45 on the string-like portion 15c that is operated when winding the screen 2 around the winding shaft 3, the string-like portion 15c to be operated can be easily selected from the two string-like portions 15c and 51d.

[0069] Furthermore, as shown in Figure 26, in the fourth modified example described above, an identification mark 45 may be attached to the string-like portion 15c of the two string-like portions 15c, 51d leading out to the outside from the opening 5c ​​of the vertical frame member 5.

[0070] In the above embodiment, the operation cord 15 is an endless ball chain in which the balls 15a are connected to each other by the connecting strips 15b, but the present invention is not limited to this. The operation cord 15 may be a string made of synthetic resin or cloth. [Explanation of symbols]

[0071] 1,1A,1B,1C,1D Roller screen device 2 Screens 3 Winding shaft 4 Winding box 5 Vertical frame members 7 Guide rail 9 Winding spring 15 Operation Code 15A operation cord (outdoor operation cord) 15c String-like part (one of the string-like parts) 15d String-shaped part 20 Outlet 24 Turning member 25 1st gear pulley (gear wheel) 25a Gear flange part (first gear part) 25c Engagement gear (first pulley part) 27 2nd gear pulley 27a Gear flange section (gear section, second gear section) 27c Engagement gear (pulley part, second pulley part) 39 Introduction 45 Identification 100 frame L1,L2 axis

Claims

1. A roll screen device comprising: a winding box as a horizontal frame member for mounting to the upper end of a building opening, and a frame body having vertical frame members hanging down from the longitudinal ends of the winding box; a winding shaft supported within the winding box so as to be rotatable about its axis; a screen having one end fixed to the winding shaft and the other end extending out from the winding box, the screen being capable of being wound up or unwound from the winding shaft by the rotation of the winding shaft; and an operating cord hung within the winding box around a pulley connected to the winding shaft for rotating the winding shaft, The vertical frame member is disposed at an end portion on the indoor side in a depth direction perpendicular to the longitudinal direction of the winding box, The roller blind device is characterized in that the frame body has an outlet opening on a front surface facing the indoor side, and the operating cord is configured to be led out from the frame body to the indoor side through the outlet.

2. 2. The roller blind device according to claim 1, wherein the outlet is open to a front surface of the winding box, and the operating cord is configured to be led out through the outlet to the indoor side.

3. The roller blind device according to claim 1, characterized in that the winding box has a pull-out opening that opens at the end of the lower surface of the winding box facing the room, and the operating cord is pulled out through the pull-out opening into the vertical frame member and led out to the room side through the lead-out opening that opens at the front surface of the vertical frame member.

4. The roller blind device according to claim 3, characterized in that the operating cord, which is led out from the outlet of the vertical frame member to the indoor side, is re-introduced into the vertical frame member through an inlet opened below the outlet, and is operably engaged with the vertical frame member by a cord holding member.

5. The roller blind device according to claim 1, characterized in that a gear wheel connected to the winding shaft and a gear pulley having a gear portion meshed with the gear wheel and a pulley portion around which the operating cord is wound are provided within the winding box, and the gear pulley is arranged on the front side of the winding box relative to the gear wheel.

6. 6. The roller blind device according to claim 5, wherein the axis of the gear pulley is disposed horizontally relative to the axis of the gear wheel.

7. The roll screen device according to claim 1, characterized in that within the winding box, there are provided a first gear pulley having a first gear portion and a first pulley portion and connected to the winding shaft, and a second gear pulley having a second gear portion and a second pulley portion meshed with the first gear portion and arranged on the front side of the winding box relative to the first gear pulley, the operating cord is wound around the second pulley portion of the second gear pulley, and an outdoor operating cord led out from the underside of the winding box on the outdoor side relative to the vertical frame member is wound around the first pulley of the first gear pulley.

8. 8. The roller blind device according to claim 7, wherein the axis of the second gear pulley is disposed horizontally relative to the axis of the first gear wheel.

9. The roller blind device according to claim 1, characterized in that the operating cord is in the form of an endlessly connected loop, and two string-like portions constituting the operating cord are led out from the lead-out outlet to the indoor side.

10. A screen outlet for inserting and removing the screen into and from the winding box is provided at the front end of the lower surface of the winding box along the longitudinal direction of the winding box, The roller blind device according to claim 1, characterized in that above the screen outlet inside the winding box, a deflection member is disposed along the longitudinal direction around which the screen unwound from the winding shaft is hung and which guides the screen downward.

11. The vertical frame member holds a guide rail that guides the side end of the screen in the vertical direction as it is unwound from the winding shaft and led out to the outside, and the upper end of the guide rail extends through the screen lead-out outlet of the winding box to directly below the turning member inside the winding box.

12. One of the two string-like portions is operated when the winding shaft is rotated in the direction of winding up the screen, and an identification mark is provided on the one of the string-like portions to indicate that the one is the string-like portion to be operated.

10. The roller blind device according to claim 9.

13. The identification mark is a color different from the color of the operation code. The roller blind device according to claim 12.

Images