Screen device mounting structure

Abstract

To provide a rolling screen device mounting structure capable of more easily mounting a rolling screen device on a building opening.SOLUTION: A rolling screen device 1 is mounted in a building opening by supporting both ends of a take-up box 4 with a pair of brackets 73, 73 mounted to the inner surfaces of both side frames 72, 72; the pair of brackets each have a fixed wall, a lower support wall 76, and a rear support wall 77; locking mechanisms 76a, 80 are provided between the lower support wall 76 of the brackets and both ends of the take-up box, respectively, for locking both the ends of the take-up box to the brackets in such a manner that both the ends of the take-up box can be engaged and disengaged with the brackets; both the ends of the take-up box are sandwiched between the lower support wall 76 and the side wall frame 71 in the vertical direction; and both of the ends of the take-up box are locked to the brackets by the locking mechanisms in a state of being brought into contact with the rear support wall 77 in the depth direction.SELECTED DRAWING: Figure 19

Description

Technical Field

[0001] The present invention relates to an attachment structure of a screen device attached to a building opening.

Background Art

[0002] A screen device attached to a building opening for the purpose of light shielding, privacy protection, insect prevention, etc. is already known as disclosed in, for example, Patent Document 1. This Patent Document 1 discloses an example in which a roll screen device is attached to a building opening, and a bracket for fixing the roll screen device to the building opening is fixed to the upper frame of the building opening, and a case 3 incorporating a winding shaft for winding the screen is locked to this bracket. By the way, in what is described in this Patent Document 1, the roll screen device is attached by locking the locking protrusions 21, 22, 2 of the case 3 to the locked protrusion of the bracket. However, since this bracket is fixed to the upper frame of the building opening, when attaching the screen device to the building opening, the view of the locked protrusion in the bracket is blocked by the case 3, so the work of locking the locking protrusions 21, 22, 26 to the locked protrusion is not always easy. Therefore, the development of an attachment structure that enables the roll screen device to be more easily attached to the building opening has been desired.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technical problem of the present invention is to provide a mounting structure for a roller screen device that allows for easier installation of the roller screen device to a building opening. [Means for solving the problem]

[0005] To solve the above problems, the present invention provides a mounting structure for a roll screen device to a building opening, wherein the building opening is formed by an upper horizontal frame defining its upper end and a pair of side frames hanging down from both ends of the upper horizontal frame with their inner surfaces facing each other in the width direction, the roll screen device has a winding box with a winding shaft inside that winds up the screen by rotation around an axis, and the roll screen device is mounted inside the building opening by a pair of brackets attached to the inner surfaces of both side frames in the building opening, supporting both ends of the winding box in the axial direction, the pair of brackets having a fixed wall fixed to the inner surface of the side frame and extending inward from the fixed wall to the building opening A mounting structure for a roll screen device is provided, comprising a lower support wall erected in the depth direction and extending in the depth direction, and a rear support wall erected inward from the fixed wall toward the building opening and extending in the vertical direction, wherein a locking mechanism is provided between the lower support wall of the bracket and the lower surfaces of both ends of the winding box in the depth direction, and both ends of the winding box are supported from below in the vertical direction by the lower support wall of the pair of brackets and sandwiched between the lower support wall and the upper horizontal frame of the building opening, and are locked to the brackets by the locking mechanism in the depth direction while in contact with the rear support wall of the pair of brackets.

[0006] Preferably in the present invention, the locking mechanism consists of locking holes provided on both ends of the winding box and on one side of the rear support wall of the pair of brackets, and locking claws provided on the other side of both ends of the winding box and the rear support wall of the pair of brackets, wherein the locking claws are configured to elastically lock into the locking holes.

[0007] Furthermore, the winding box may be provided with a fixing member that is fixed to the front end surface in the depth direction of the upper horizontal frame. [Effects of the Invention]

[0008] According to the present invention, the process of locking the winding box to the bracket becomes easier, thus providing a mounting structure for a roller screen device that allows for easier installation of the roller screen device to a building opening. [Brief explanation of the drawing]

[0009] [Figure 1] This is a front view showing one embodiment of the roller screen device according to the present invention. [Figure 2] This is a front view showing a portion of the above-mentioned roller screen device in a cutaway state. [Figure 3] This is a horizontal cross-sectional view of the winding box. [Figure 4] This is a perspective view of the vertical frame member. [Figure 5] (a) is a partially enlarged cross-sectional view showing one end of the winding box, and (b) is a cross-sectional view of section II in (a). [Figure 6] This is an exploded perspective view showing the connection between the end cap and the pulley box in the winding box described above. [Figure 7] This is an exploded perspective view showing the operating mechanism and winding force adjustment mechanism of the above-mentioned roller screen device. [Figure 8] This is a side cross-sectional view of the above-mentioned roller screen device, schematically showing the operating mechanism inside the pulley box. [Figure 9] The above-mentioned roll screen device is a side cross-sectional view schematically showing the state in which the screen is most tightly wound onto the winding shaft within the winding box. [Figure 10] This is an exploded perspective view of the winding force adjustment mechanism shown above. [Figure 11]It is a perspective view showing a state in which a winding force adjusting mechanism is housed in a gear cover. [Figure 12] It is an enlarged view of a main part showing the mutual positional relationship of a rotor, a brake spring, and a biasing force adjusting piece in the winding force adjusting mechanism. [Figure 13] It is a perspective view showing the outer surface side of the pulley box. [Figure 14] It is a side view showing a state in which a gear cover is attached to the outer surface side of the pulley box. [Figure 15] It is a front view showing a state in which a bracket is attached to a side frame of a building opening. [Figure 16] It is an enlarged side sectional view of the main part of FIG. 15. [Figure 17] It is an enlarged horizontal sectional view of the main part of FIG. 15 as seen from the bottom side. [Figure 18] It is an enlarged side sectional view schematically showing a state during the attachment of a winding box to a bracket. [Figure 19] It is an enlarged side sectional view schematically showing a state in which a winding box is attached to a bracket. [Figure 20] It is an enlarged view of the main part of FIG. 19. [Figure 21] It shows a first modified example of an operating mechanism in the roll screen device, and is a side sectional view schematically showing the operating mechanism inside the pulley box. [Figure 22] It is an exploded perspective view of the operating mechanism in the first modified example. <000009​​​​​​​​​ [Figure 26] It is a sectional view of the main part of FIG. 25. [Figure 27] It is a plan view showing a state in which a lead-out member is attached to an opening of a vertical frame member. [Figure 28] It is an exploded perspective view showing a cord holding member that houses an operation cord pulled out to the indoor side into the above storage space.

Embodiments for Carrying out the Invention

[0010] Hereinafter, embodiments of a roll screen device according to the present invention will be described with reference to FIGS. 1 to 20. The roll screen device 1 of the present embodiment is a vertically opening type screen device, and includes a winding box 4 as a horizontal frame member for attaching to the upper end of a building opening, and vertical frame members 5, 5 that hang downward from the left and right ends in the longitudinal direction of the winding box 4. A frame body 100, a winding shaft 3 rotatably supported around a horizontal axis L1 in the winding box 4, and one end fixed to the winding shaft 3 and the other end led out from the winding box 4 to the outside. And a screen 2 that can be wound and unwound with respect to the winding shaft 3 by the rotation of the winding shaft 3.

[0011] Engaging members such as slide fasteners are attached to the left and right side edges of the screen 2, and the engaging members are slidably engaged within a slit 7a of a guide rail 7 held by the vertical frame members 5, 5. When opening and closing, the screen 2 can move vertically along the vertical frame members 5, 5. Further, 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 bar 8 having a function of an opening and closing operation and a function of a counterweight.

[0012] As shown in Figure 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 that has a storage space S inside, and the first frame portion 5a and the second frame portion 5b are joined together to form an L shape. The second frame portion 5b has an opening 5c ​​that extends vertically and opens to the interior side in the depth direction, and the interior space and the storage space S are in communication through the opening 5c.

[0013] As shown in Figure 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 cylindrical portion 3c fixedly fitted to the winding shaft body 3a from its tip, a circular flange portion 3d connected to the base end of the cylindrical portion 3c and extending outward in the direction of the axis L1, with the tip end protruding radially outward, and an elongated rectangular cylindrical portion 3e connected to the base end of the circular cylindrical portion 3c radially inward from the flange portion 3d and extending outward in the direction of the axis L1. The outer shape of the rectangular cylindrical portion 3e is formed in a rectangular shape in cross-section, and a support hole 3f is provided in the center thereof, penetrating in the direction of the axis L. Furthermore, winding mechanisms are connected to both ends of the winding shaft 3, which accumulate a rotational biasing force that rotates the winding shaft 3 in the direction of winding up the screen 2 as the screen 2 is unwound and the winding shaft 3 rotates around its axis L1.

[0014] The above winding mechanism includes a winding spring 9 made of a coil spring arranged on the axis L1, a spring receiver 6 fixedly fitted to the winding shaft body 3a around the axis L1 at the center of the winding shaft body 3a in the direction of axis L1, and a spring shaft 10 at the end of the winding shaft body 3a in the direction of axis L1, with its tip rotatably inserted outward from inside the winding shaft body 3a into the support hole 3f of the winding cap 3b. Within 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, which is 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 the winding force adjustment mechanism described later.

[0015] The winding box 4 described above has a hollow box body 11 with a rectangular cross-section that extends horizontally, and end caps 12 provided at both ends of the box body 11. As shown in Figures 5 and 6, fixing pieces 12a for fixing 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 together by inserting the fixing pieces 12a into the ends of the box body 11 and screwing them in.

[0016] As shown in Figure 9, a screen outlet 13 extending horizontally is provided on the lower surface of the box body 11 along the axis L1. When the winding shaft 3 housed in the winding box 4 rotates around the axis L1, the screen 2 wound around the winding shaft 3 is unwound from the screen outlet 13 or wound onto the winding shaft 3. At this time, the screen outlet 13 is located at the indoor end of the winding box 4, and the guide rail 7 held by the vertical frame member 5 is positioned at the indoor end of the lower surface of the winding box 4 accordingly.

[0017] Furthermore, as shown in Figures 2, 3, and 9, a deflection 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 deflection member 24 consists of a deflection roller 24a around which the screen 2 unwound from the winding shaft 3 is wrapped and guided downward, and a support base 24b that supports the deflection roller 24a from below to prevent deflection of the deflection roller 24a, with the deflection roller 24a positioned directly above the screen outlet 13. By providing the deflection member 24, the screen 2 deflected downward via the deflection roller 24a is prevented from sliding against the opening edge of the screen outlet 13, and moreover, as shown in Figure 9, the guide rail 7 is routed through the screen outlet 13 to the winding box 4 Extending the cable further inside makes the entry and exit of screen 2 from the winding box 4 more stable. Typical It has become that.

[0018] The winding box 4 is provided with operating mechanisms at both ends (outside in the direction of the axis L1 of the end cap 12) for guiding the screen 2 in and out of the winding box 4. As shown in Figures 7 and 8, the operating mechanism has a pulley 14 as a rotational transmission body connected to the winding shaft 3, and an endless loop-shaped, flexible operating cord 15 wrapped around the pulley 14. These pulley 14 and operating cord 15 are held in a pulley box 16, which will be described later. The pulley box 16 is attached to the end cap 12 by fastening together with an end plate 17 that closes its inner surface. The spring shaft 10 inserted into the rectangular cylindrical portion 3e of the winding cap 3b and its support hole 3f extends into the pulley box 16 through the cylindrical portion 12b formed in the end cap 12 and the through hole 17a that penetrates in the thickness direction of the end plate 17. teeth, It is inserted into the cylindrical portion 12b so as to be rotatable around the axis L1.

[0019] The pulley 14 has a rectangular hole 14a formed in its center, with a rectangular cross-section, and the tip of the rectangular cylindrical part 3e is fitted into the rectangular hole 14a, thereby integrally connecting the winding shaft 3 and the pulley 14 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 rotate simultaneously around the axis L1 relative to the spring shaft 10, which is fixed to the winding box 4. The pulley 14 is integrally formed by a pair of flange parts 14b and 14c arranged at both ends in the direction of the axis L1, and an engaging gear 14d sandwiched between these flange parts 14b and 14c and formed to have a smaller diameter than these flange parts 14b and 14c. The operating cord 15 is wrapped around this engaging gear 14d.

[0020] As shown in Figures 5 and 7, the above-mentioned operating cord 15 consists of an endless ball chain in which numerous ball bodies 15a, each formed in a roughly spherical shape (in this embodiment, the longitudinal cross-section is elliptical and the transverse section is circular), are connected to each other at equal intervals by connecting strips 15b, and is configured to be flexible as a whole. When the operating cord 15 is suspended from the winding box 4, pulling one of the two string-like portions formed between the upper and lower folds against the elastic spring force (i.e., rotational biasing force) around the axis L1 of the winding spring 9 causes the pulley 14 to rotate to one side in the circumferential direction due to the engagement between the engaging gear 14d and the ball bodies 15a of the operating cord 15, and together with the weight of the movable strut 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 rotates to the other side in the circumferential direction, and in combination with the rotational biasing force accumulated in the winding spring 9, the screen 2 is wound onto the winding shaft 3. The roll screen device 1 may also be equipped with a known locking means for holding the screen 2 in a desired tensioned state.

[0021] As shown in Figures 5, 7, and 8, the pulley box 16 has a base portion 18 formed in the shape of a plate with a rectangular appearance in plan view, a pulley 14 housing portion 19 formed on the inner side of the pulley box 16 by an outer peripheral wall 22 that rises from the base portion 18 toward the winding shaft 3 so as to surround the axis L1, a pair of outlets 20 that open on the front of the pulley box 16 facing the interior side, and a pair of connecting passages 21 that connect the housing portion 19 and the pair of outlets 20. The operating cord 15 that is wrapped around the engagement gear 14d of the pulley 14 inside the housing portion 19 is led out to the interior side from the pair of outlets 20 through the pair of connecting passages 21.

[0022] The housing section 19 described above is for rotatably housing the pulley 14, and has an outer peripheral wall 22 erected in an annular shape around 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 of the pulley 14 (winding shaft 3 side) is rotatably supported by the through hole 17a of the end plate 17, and the shaft portion on the other side (pulley box 16 side) is rotatably supported by the inner peripheral wall 23.

[0023] According to the above-described roller screen device 1, the guide rail 7 held by the vertical frame member 5 is positioned at the interior end in the depth direction, and an outlet 20 for leading the operating cord 15 to the interior is opened on the interior-facing front of the winding box 4. As a result, even if there is a handle protruding inward from a window or door, the winding box 4 can be installed close to the fixture, and the operability of the operating cord 15 is not impaired.

[0024] The above winding force adjustment mechanism will now be explained. As shown in Figures 10-12, the winding force adjustment mechanism is as described above. Pulley boxDistributed on the outer surface of 16, it includes a brake fitting portion 50 fixedly attached to the winding box 4, a brake spring 51 formed from a coil spring made of a spring material having a first end 51a and a second end 51b on the opposite side, fitted to the brake fitting portion 50 with a fitting force that prevents rotation in the circumferential direction, and a rotor 52 that engages with the first end 51a or the second end 51b of the spring material forming the brake spring 51 in a direction that reduces the diameter of the brake spring 51. These brake fitting portion 50, brake spring 51, rotor 52, and the outer ring member 56 described later are aligned on the axis L1.

[0025] The brake fitting portion 50 described above is formed in a cylindrical shape, Pulley box On the outer surface of the pulley box 16, it is integrally provided with a gear cover 60 that covers the winding force adjustment mechanism from the outside. As shown in Figure 13, a cover mounting groove 16a for positioning and fixing the gear cover 60 is provided on the outer surface of the base 18 of the pulley box 16, and the gear cover 60 is fixed with screws while engaged with the cover mounting groove 16a. In its initial state, before elastic deformation, the brake spring 51 has an inner diameter 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 coil diameter expanded, and is fixedly attached to the brake fitting portion 50 by an elastic restoring force that attempts to reduce its diameter back to its original size.

[0026] The rotor 52 has a small-diameter circular projection 52a located at one end in the direction of the axis L1, and a large-diameter projection 52b located at the other end, which is larger in diameter than the small-diameter projection 52a. As shown in Figure 5, the small-diameter projection 52a is inserted into the brake fitting portion 50 and supported so as to be rotatable, and the large-diameter projection 52b is inserted into a rotor opening 16b provided in the cover mounting groove 16a of the pulley box 16 and supported so as to be rotatable. Furthermore, the large-diameter projection 52b has a groove 52c into which the shaft end 10a at the tip of the spring shaft 10 is fixedly fitted around the axis L1. In other words, the rotor 52 rotates together with the spring shaft 10.

[0027] Furthermore, the rotor 52 has a protruding ridge 52d extending in a predetermined angular range in the circumferential direction on the outer circumference of the large-diameter protrusion 52b in the middle portion in the direction of the axis L1, and a notch 53 is formed between both ends of the protruding ridge 52d in the circumferential direction. A first surface 53a and a second surface 53b are formed at both ends of the notch 53 in the circumferential direction, i.e., at both ends of the protruding ridge 52d in the circumferential direction, and these are opposite each other. The first end 51a and the second end 51b of the brake spring 51 are positioned between these first surface 53a and second surface 53b. In this embodiment, as shown in Figure 12, the rotor 52's first surface 53a is constantly engaged with the first end 51a of the brake spring 51 due to the rotational biasing force of the winding spring 9, thereby biasing the brake spring 51 in the direction of diameter reduction, i.e., in the direction of tightening the brake spring 51.

[0028] Furthermore, the winding force adjustment mechanism is rotatably mounted circumferentially on the brake spring 51 and rotor 52 and includes a biasing force adjustment piece 54 that can selectively engage with either the first end 51a or the second end 51b of the brake spring 51 in the circumferential direction, and an operating part 55 for rotating the biasing force adjustment piece 54. The biasing force adjustment piece 54 is located on the outside of 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 operating part 55. The biasing force adjustment piece 54 is positioned between the first end 51a and the second end 51b of the brake spring 51 in the notch 53. By rotating the outer ring member 56 in conjunction with the operation of the operating part 55, the biasing force adjustment piece 54 can be selectively engaged with either the first end 51a or the second end 51b, thereby biasing the brake spring 51 in the direction of diameter expansion, that is, in the direction of loosening the winding of the brake spring 51.

[0029] As will be described in detail later, such operation reduces the fitting force of the brake spring 51 to the brake fitting portion 50, allowing the brake spring 51 to rotate relative to the brake fitting portion 50. As a result, the brake spring 51 rotates around the axis L1 together with the biasing force adjustment piece 54, and furthermore, the biasing force adjustment piece 54 presses the first surface 53a of the rotor 52 in direction A in Figure 12 around the axis L1 together with the first end 51a of the brake spring 51, or presses the second surface 53b of the rotor 52 in direction B together with the second end 51b of the brake spring 51, 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 acting on the winding shaft 3 by the winding spring 9 can be appropriately adjusted according to the unwinding length of the screen 2.

[0030] The outer ring member 56 has a drive gear 56a on its outer circumference, which has multiple gear teeth arranged at equal angular intervals. In contrast, the operating unit 55 has multiple transmission gears 55a, 55b, 55c, and 55d, which are spur gears that mesh with the drive gear 56a of the outer ring member 56 and transmit rotational force about axis L1 to the outer ring member 56. The transmission gears 55a-55d have different axes of rotation, and these axes of rotation are aligned in a straight line parallel to axis L1. An even number of transmission gears 55a-55d are arranged, and in this embodiment, a total of four are arranged. One end of the axis of rotation of the transmission gears 55a-55d is rotatably supported in a plurality of circular holes 61 opened in the gear cover 60, and the other end is rotatably supported in a plurality of gear openings 16c opened in the cover mounting groove 16a of the pulley box 16.

[0031] Furthermore, the transmission gears 55a-55d have a concave outer engagement groove 57 on one end face of the rotating shaft (gear cover 60 side), and the tip of a flathead screwdriver can be engaged with the outer engagement groove 57 to rotate the transmission gears 55a-55d in conjunction with each other. Since this outer engagement groove 57 faces the outside through the circular hole 61 of the gear cover 60, for example, before installing the winding box 4 into a building opening, 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.

[0032] Furthermore, the transmission gears 55a-55d also have an inner engagement groove 58 formed on the end face of the other end of the rotating shaft (pulley box 16 side), which can be engaged with a flathead screwdriver. However, of the transmission gears 55a-55d, all except the transmission gear 55d furthest from the outer ring member 56 (referred to as the "outermost transmission gear") are not visible from the inside of the winding box 4 because the inner surface of the pulley box 16 is closed off by the end cap 12.

[0033] The outermost transmission gear 55d has a rotating shaft 59 supported by the pulley box 16 that extends into the box body 11 of the winding box 4 through an opening 17b in the end plate 17 and an opening 12c in the end cap 12, with the inner engagement groove 58 facing into the box body 11. As a result, even after the roll screen device 1 has been installed in a building opening, for example, the rotational biasing force of the winding spring 9 can be adjusted by rotating the outermost transmission gear 55d from inside the winding box 4. Furthermore, since the outermost transmission gear 55d is positioned radially outward from the axis L1 than the outer diameter of the screen 2 when it is fully wound onto the winding shaft 3, it does not interfere with the screen 2 when rotated from inside the winding box 4. Furthermore, the number of teeth of the transmission gears 55a-55d is less than the number of teeth of the drive gear 56a of the outer ring member 56 (that is, 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.

[0034] When adjusting the rotational biasing force of the winding spring 9, the tip of a flathead screwdriver is engaged with the outer engagement groove 57 of either of the transmission gears 55a-55d from the outside of the winding box 4, or the tip of a flathead 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.

[0035] For example, when increasing the rotational biasing force, operating the operating part 55 to rotate the outer ring member 56 in one direction around the axis L1 (direction of arrow A in Figure 12) causes the biasing force adjustment piece 54 to engage 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 it makes with the second end 51b, thereby loosening the winding of the brake spring 51 and expanding its diameter. As a result, the fitting force of the brake spring 51 to the brake fitting part 50 is reduced, and rotation of the brake spring 51 around the axis L1 is permitted. 51a The outer ring member 56 is engaged with both the rotor and the first surface 53a of the rotor 52. Further rotation of the outer ring member 56 causes the rotor 52 and the spring shaft 10 connected to it to rotate together with the outer ring member 56, and as a result the winding spring 9 is tightened, increasing its rotational biasing force.

[0036] After adjusting the winding spring 9 to an appropriate rotational biasing force in this manner, when the flathead screwdriver is removed from the outer engagement groove 57 or the inner engagement groove 58, the rotational biasing force of the winding spring 9 in the unwinding direction causes the first surface 53a of the rotor 52 to engage with the first end 51a of the brake spring 51, and the brake spring 51 is wound up and reduced in diameter in a direction that reduces the circumferential angle that the first end 51 makes with the second end 51b. The rotor is pressed in the direction of rotation. This increases the fitting force of the brake spring 51 against the brake fitting portion 50, resulting in the brake spring 51 being fitted to the brake fitting portion 50 with a fitting force that prevents rotation around the axis L1. As a result, the rotation of the rotor 52 and the spring shaft 10 connected thereto is prevented, the spring shaft 10 becomes fixed to the winding box 4, and the adjustment of the rotational biasing force of the winding spring 9 is completed.

[0037] On the other hand, when reducing the rotational biasing force, the operating part 55 is similarly operated to rotate the outer ring member 56 in another direction around the axis L1 (in the direction of arrow B in Figure 12), causing the biasing force adjustment piece 54 to engage 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 it makes with the first end 51a, thereby unwinding the brake spring 51 and expanding its diameter. As a result, the fitting force of the brake spring 51 to the brake fitting part 50 is reduced, and rotation of the brake spring 51 around the axis L1 is permitted. In this state, the biasing force adjustment piece 54 is engaged with both the second end 51b of the brake spring 51 and the second surface 53b of the rotor 52. Furthermore, by 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 of the winding spring 9 is loosened, thereby reducing its rotational biasing force.

[0038] Similarly, when the flathead screwdriver is removed from the outer engagement groove 57 or the inner engagement groove 58, the rotational biasing force of the winding spring 9 in the unwinding direction causes the first surface 53a of the rotor 52 to engage with the first end 51a of the brake spring 51, causing the brake spring 51 to be wound again and fitted to the brake fitting portion 50 with a fitting force that prevents rotation around the axis L1. As a result, the rotation of the rotor 52 and the spring shaft 10 connected thereto is prevented, the spring shaft 10 becomes fixed to the winding box 4, and the adjustment of the rotational biasing force of the winding spring 9 is completed.

[0039] In addition, the above-mentioned roller screen device 1 allows for individual adjustment of the rotational biasing force of the winding springs 9, 9 located on both the left and right sides by winding force adjustment mechanisms located 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, resulting in the screen 2 not being wound uniformly 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.

[0040] Next, the mounting structure of the winding box 4 to the building opening in this embodiment will be described. As shown in Figures 15-17, 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 downward from both ends of the upper horizontal frame 71 and whose inner surfaces face each other in the width direction. A pair of brackets 73, 73 are attached to the inner surfaces of the upper ends of the side frames 72, 72 of the building opening, and these brackets 73, 73 are configured to support both ends of the winding box 4 in the direction of the axis L1.

[0041] Each of the 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 inward direction of the building opening and extending in the depth direction, and a rear support wall 77 erected from the fixed wall 74 toward the inward direction of the building opening and extending in the vertical direction. The fixed wall 74 is a rectangular plate in plan view, elongated in one direction, and is fixed to the side frame 72 with screws 78 in a position with its longitudinal side aligned vertically. The upper end of this fixed wall 74 abuts against the inner surface of the upper horizontal frame 71.

[0042] The lower support wall 76 is provided at the lower end edge of the fixed wall 74 and extends over the entire width (depth) of the fixed wall 74. Furthermore, 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 at the exterior side edge of the fixed wall 74 in the depth direction and extends over the entire longitudinal (vertical) area of ​​the fixed wall 74. throughoutFurthermore, 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. Moreover, the heights of the lower support wall 76 and the rear support wall 77 in the vertical direction are equal. In addition, a locking hole 76a is provided on the interior side in the depth direction of the lower support wall 76, and the locking hole 76a and the locking claw 80 provided on the winding box 4 side that is locked into the locking hole 76a constitute a locking mechanism that restrains the movement of the winding box 4 in the depth direction.

[0043] The pair of brackets 73, 73 above support the pulley boxes 16 located at both ends of the winding box 4. As shown in Figures 13 and 20, the lower surface of the pulley box 16 is provided with a locking claw 80 that engages with the locking hole 76a. The locking claw 80 has a plate-like 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 cross-section) locking portion 82 provided at the tip of the plate-like portion 81 and projecting downward. The plate-like portion 81 is formed by a cantilevered 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 indoor end of the pulley box 16. As shown in Figure 20, the locking portion 82 has an inclined portion 82a formed with a downward slope from the outdoor side to the indoor side in the depth direction, and a hook portion 82b that extends substantially vertically upward from the lower tip of the inclined portion 82a and locks onto the opening edge of the locking hole 76a.

[0044] Furthermore, as shown in Figures 1, 18, and 19, the upper surface of the box body 11 of the winding box 4 is provided with an L-shaped metal fitting 83, one of which is fixed to the box body 11 and the other having a round hole 83a for screw insertion that rises upward. The winding box 4 is supported by a pair of brackets 73, 73 and is screwed to the front end of the upper horizontal frame 71 via the round hole 83a.

[0045] When attaching the winding box 4 of the roller screen device 1 to the pair of brackets 73, 73 described above, the lower end of the pulley box 16 of the winding box 4 is supported by the lower support wall 76 of the brackets 73, 73, and the winding box 4 is pushed toward the outside. Pulley box Before the rear end (outside end) of 16 contacts the rear support wall 77 of the pair of brackets 73, 73, the locking claw is attached to the front end edge of the lower support wall 76. 80 of Slope As 82a rises, the plate-shaped portion 81 elastically deforms upward, and the lower end of the locking portion 82 (the intersection of the inclined portion 82a and the hook portion 82b) rises to the same height as the lower surface of the pulley box 16. Furthermore, the winding box 4 is pushed in and the above Pulley box When the rear end of 16 is supported by contacting the rear support wall 77, The above locking claw 80 The hook portion 82b reaches the opening edge of the locking hole 76a, the plate-shaped portion 81 elastically returns to its original position, and the locking claw 80 engages with the locking hole 76a, completing the installation of the winding box 4.

[0046] When the above installation is complete, both ends of the winding box 4 are held between the lower support walls 76 of the pair of brackets 73, 73 and the upper horizontal frame 71 in the vertical direction, thereby restricting its movement in the vertical direction, and its movement in the depth direction is restricted by the rear support wall 77 and the locking mechanism. On the other hand, to remove the winding box 4 from the pair of brackets 73, 73, a tool such as a screwdriver can be used to push upward from the lower side of the lower support wall 76 onto the locking claw 80 that is locked in the locking hole 76a, thereby releasing the lock, and the winding box 4 can be pulled out into the room. In this way, the winding box 4 is configured to be easily attached to or removed from the building opening.

[0047] Figures 21-28 show various modified versions of the operating mechanism in the above-described roller screen device. In the following descriptions of the modified versions, any content that overlaps with the above-described embodiment will be omitted. In the first modified roll screen device 1A shown in Figure 21, the pulley box 16 has a first housing section 26 that houses a first gear pulley 25 that rotates around axis L1, and a second housing section 28 that is formed on the interior side (front side) in the depth direction of the first housing section 26 and houses a second gear pulley 27 that meshes with the first gear pulley 25. A rectangular hole 14a is provided in the center of the first gear pulley 25, as in the above embodiment (see Figure 22), and the above Rectangular cylindrical part The tip of 3e is fitted. In this embodiment, the second gear pulley 27 is the same as the first gear pulley 25, but the rectangular hole of the second gear pulley is not used.

[0048] The first housing section 26 has an outer peripheral wall 29 erected in an annular shape with axis L1 as the center, and an inner peripheral wall 30 erected in an annular shape inside the outer peripheral wall 29, having the same center as the outer peripheral wall 29. The second housing section 28 is the second gear pulley 27 Axis line L2 The first and second storage sections 26 and 28 have an outer peripheral wall 31 erected in a ring shape around a central point, and an inner peripheral wall 32 erected in a ring shape inside the outer peripheral wall 31, sharing the same center as the outer peripheral wall 31. At the point where the outer peripheral walls 29 and 31 of the first and second storage sections 26 and 28 overlap, the first and second storage sections 26 and 28 are connected to each other, thereby meshing the first gear pulley 25 and the second gear pulley 27 with each other.

[0049] The first and second gear pulleys 25 and 27 are integrally formed by gear flange portions 25a and 27a (gear portions) arranged on the winding shaft 3 side in the axial direction L1 and L2, circular flange portions 25b and 27b arranged on the pulley box 16 side opposite to the winding shaft 3, and engaging gears 25c and 27c (pulley portions) sandwiched between these gear flange portions 25a and 27a and circular flange portions 25b and 27b, and formed to have a smaller diameter than these flange portions 25a, 25b, 27a, and 27b. The gear flange portions 25a and 27a of the first and second gear pulleys 25 and 27 have multiple gear teeth provided on their outer circumference at equal angular intervals and mesh with each other as described above. The operating cord 15 is wrapped around the engaging gear 27c of the second gear pulley 27. However, in this embodiment, the engaging gear 25c of the first gear pulley 25 is not used.

[0050] Furthermore, in this modified example, similar to the above embodiment, the shaft portion on one side (winding shaft 3 side) of the first gear pulley 25 is rotatably supported by the through hole 17a that penetrates the end plate 17 attached to the end cap 12, and the shaft portion on the other side (pulley box 16 side) is rotatably supported by the inner circumferential 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 that penetrates the end plate 17 and is located adjacent to the through hole 17a, and the shaft portion on the other side is rotatably supported by the inner circumferential wall 32. In this modified example, the axis L2 of the second gear pulley 27 is positioned horizontally on the interior side in the depth direction relative to the axis L1 of the first gear pulley 25.

[0051] Furthermore, the pulley box 16 in this modified example also has a pair of outlets 20 that open on the front of the pulley box 16 facing the interior side, and a pair of connecting passages 21 that connect the second housing section 28 and the pair of outlets 20. The operating cord 15, which is wrapped around the engaging gear 27c of the second gear pulley 27 within the second housing section 28, is led out to the interior side from the pair of outlets 20 through the pair of connecting passages 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, causing the winding shaft 3 to rotate and the screen 2 to be led in and out of the winding box 4. In this modified example, since the second gear pulley 27 around which the operating cord 15 is wrapped is located closer to the interior side, the operating cord 15 can be operated more smoothly.

[0052] Furthermore, the above-mentioned operating cord may be led out not only to the indoor side but also to the outdoor side. Figure 23 shows a roller screen device 1B equipped with a second modified example of the operating mechanism. In this modified example, as with the first modified example, the second gear pulley 27 is housed in the second housing section 28, and the first gear pulley 25, which is the same as the second gear pulley, is housed in the first housing section 26. In this modified example, the outdoor operating cord 15A is routed around the engaging gear 25c of the first gear pulley 25, and the indoor operating cord 15 is routed around the engaging gear 27c of the second gear pulley 27, as with the first modified example.

[0053] In this modified example, the pulley box 16, like the first modified example, has a pair of outlets 20 that open on the front surface facing the interior of the pulley box 16, and a pair of connecting passages 21 that connect the second housing section 28 and the pair of outlets 20. The indoor operating cord 15, which is routed around the engaging gear 27c of the second gear pulley 27 within the second housing section 28, is led out to the interior from the pair of outlets 20 through the pair of connecting passages 21. In this way, when the operating cord 15 is operated from the interior, 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 to be led in and out of the winding box 4.

[0054] Furthermore, in this modified example, the pulley box 16 has a pair of outer outlets 35 that open on the lower surface of the pulley box 16 at a position on the outdoor side of the vertical frame member 5, and a pair of connecting passages 36 that connect the first housing 26 and the pair of outer outlets 35. The outdoor operating cord 15A, which is wrapped around the engaging gear 25c of the first gear pulley 25, is led out to the outdoor side from the pair of outer outlets 35 through the pair of connecting passages 36. In this way, when the operating cord 15A led out to the outdoor side is operated from the outdoor side, the winding shaft 3 rotates along 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 modified example, since the operating cords 15 and 15A are led out to both the indoor and outdoor sides, it is possible to lead the screen 2 in and out of the winding box 4 from either the indoor or outdoor side.

[0055] Figure 24 shows a third modified roll screen device 1C, which is similar to the second modified example in that the same first and second gear pulleys 25 and 27 are housed in the first and second housing sections 26 and 28, but in this third modified example, the second housing section 28 Second gear pulley This differs from the second modification in that the indoor operating cord 15, which is routed around the engagement gear 27c of the 27, is led out to the indoor side from the lower surface of the winding box 4.

[0056] In this modified example, the pulley box 16 also has a pair of external outlets 35 that open on the lower surface of the pulley box 16 at a position on the outdoor side of the vertical frame member 5, and a pair of connecting passages 36 that connect the first housing section 26 and the pair of external outlets 35. In addition, it has a pair of pull-out outlets 37 that open on the indoor side end of the lower surface of the pulley box 16, and a pair of connecting passages 38 that connect these pair of pull-out outlets 37 to the second housing section 28. Here, the pair of pull-out outlets 37 are located directly above the housing space S in the vertical frame member 5 (second frame section 5b), and the indoor operating cord 15 is housed in the housing space S from the pair of pull-out outlets 37 through the connecting passages 38. The operating cord 15 can then be operated through the opening 5c ​​that opens to the indoor side in the vertical frame member 5. In other words, in this example, the opening 5c ​​of the vertical frame member 5 plays the role of the outlet 20 that leads the operating cord 15 to the indoor side. Therefore, in this modified example, in order to facilitate operation of the operating cord 15 from the indoor side, it is desirable that the opening width of the opening 5c ​​be large enough so that the operating cord 15 can be pulled out by hand from the storage space S through the opening 5c ​​to the outside.

[0057] In the second and third modifications described above, the first gear pulley 25 and the second gear pulley 27 are the same in structure and diameter, but they may be different in structure and diameter as needed. For example, the central rectangular hole in the second gear pulley 27 can be omitted, and in the second modification, the engagement of the first gear pulley 25 Gear 25c This step can also be omitted. Furthermore, 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.

[0058] Furthermore, as in the third modified example described above, if the operating cord 15 is led out from inside the winding box 4 into the storage space S of the vertical frame member 5, it can also be configured as follows. Figures 25-28 show the fourth modified example of the roller screen device 1D. In this fourth modified example, as with the third modified example, the operating cord can be led out on both the indoor and outdoor sides, or, as with the third modified example, the outdoor operating cord 15A can be omitted and the operating cord 15 can be led out only on the indoor side. Therefore, the configuration inside the winding box 4 (pulley box 16) will be omitted here, and the configuration mainly concerning the vertical frame member 5 will be described.

[0059] In this fourth modification, the operating cord 15, which is housed in the storage space S of the vertical frame member 5 from the outlet 37 and temporarily led out to the outside through the opening 5c ​​which serves as the outlet 20 in the vertical frame member 5, is configured to be housed again in the storage space S through an opening 5c ​​which serves as the inlet 39 and is opened below the outlet 20. Specifically, the second frame portion 5b of the vertical frame member 5 is provided with an outlet member 40 for leading the operating cord 15 from the storage space S to the interior through the opening 5c ​​which serves as the outlet 20, and a cord holding member 41 located below the outlet member 40 for operably locking the operating cord 15, which has been temporarily led out to the interior by the outlet member 40, back into the storage space S through the opening 5c ​​which serves as the inlet 39, to the second frame portion 5b.

[0060] The lead member 40 has a lid portion 40a that is formed in an elongated mountain shape extending vertically so as to cover a part of the opening 5c ​​of the vertical frame member 5 and protrude forward into the interior, and a pair of legs 40b, 40b that are pushed into the opening 5c. Locking claws 40c, 40c facing away from each other are formed on the outer sides of the tips of the pair of legs 40b, 40b. When attaching the lead member 40 to the opening 5c, the legs 40b, 40b are pushed into the storage space S from the opening 5c. When this is done, the inclined surface of the locking claws 40c comes into contact with the tip of the opening 5c, the legs 40b, 40b elastically deform inward, and when the inclined surface of the locking claws 40c passes through the opening 5c, the legs 40b, 40b elastically return to their original position, the locking claws 40c are locked into the opening 5c, and the lead member 40 is attached to the vertical frame member 5.

[0061] The cord holding member 41 is arranged in the housing space S and includes a guide wheel 41a around which the operating cord 15 is wrapped, a pair of support plates 41b, 41b arranged in the housing space S and supporting the guide wheel 41a from both sides, a shaft portion 41c of the guide wheel 41a stretched between the pair of support plates 41b, 41b, a lever 41d positioned 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 the opening 5c ​​of the vertical frame member 5 and guides the vertical movement of the cord holding member 41.

[0062] The cord holding member 41 is fixed at an appropriate vertical position on the vertical frame member 5 by fastening together a screw fastening portion 41f, which has a screw hole formed therein, and a receiving piece 41g, which is arranged in the housing space S, with a screw 42. The vertical position can be adjusted by loosening these fasteners. The lever 41d can be used for this adjustment. The cord holding member 41 is configured such that when the operating cord 15 is operated, the guide wheel 41a rotates around its axis, allowing the operating cord, which has been led out to the interior side, to be smoothly returned to the housing space S. According to this fourth modification, for example, the operating cord 15 can be led out to the interior of the room from the upper side of the vertical frame member 5 and housed in the storage space S of the vertical frame member 5 from the lower side, thereby positioning the operating cord 15 out of reach of children. [Explanation of symbols]

[0063] 1,1A,1B,1C,1D Roller screen device 3. Reel 4. Reel box 71 Upper horizontal frame 72 Side frame 73 Bracket 74 Fixed wall 76 Lower support wall 76a Locking hole 77 Rear support wall 80 Locking claws 83 Metal fittings (fixing components) L1 axis

Claims

1. A mounting structure for a roller screen device for a building opening, The above-mentioned building opening is formed by an upper horizontal frame that defines its upper end, and a pair of side frames that hang downward from both ends of the upper horizontal frame, with their inner surfaces facing each other in the width direction. The above-mentioned roll screen device has a winding box that has a winding shaft inside that winds up the screen by rotating around an axis, The roll screen device is installed inside the building opening by supporting both ends of the winding box in the axial direction with a pair of brackets attached to the inner surfaces of the frames on both sides of the building opening. Each of the above-mentioned pairs of brackets comprises a fixed wall fixed to the inner surface of the side frame, a lower support wall erected from the fixed wall toward the inward direction of the building opening and extending in the depth direction, and a rear support wall erected from the fixed wall toward the inward direction of the building opening and extending in the vertical direction. Between the lower support walls of these brackets and the lower surfaces of both ends of the winding box, locking mechanisms are provided in the depth direction to detachably lock both ends of the winding box to the brackets. Both ends of the above-mentioned winding box are supported from below in the vertical direction by the lower support walls of the pair of brackets and are sandwiched between the lower support walls and the upper horizontal frame of the building opening, and in the depth direction, they are locked to these brackets by the locking mechanism while in contact with the rear support walls of the pair of brackets. A mounting structure for a roller screen device characterized by the following features.

2. The locking mechanism is comprised of locking holes provided on both ends of the winding box and on one side of the rear support wall of the pair of brackets, and locking claws provided on the other side of both ends of the winding box and the rear support wall of the pair of brackets, wherein the locking claws are configured to elastically lock into the locking holes, as described in claim 1.

3. The mounting structure for a roll screen device according to claim 1, characterized in that the winding box is provided with a fixing member that is fixed to the front end surface in the depth direction of the upper horizontal frame.

Images