Roll screen device and installation structure thereof

Abstract

To provide a roll screen device which is installed on a window that opens from a building opening at an angle outward and can suppress the entry of sunlight into a room as much as possible, and provide an installation structure of the roll screen device.SOLUTION: A roll screen device 1 includes a screen whose one end is attached to a winding shaft 5 for being wound up therearound, a frame body 15 for fixing to a vertical window frame 42 arranged on the open end side of a window frame 41 provided around a window 40, a winding box 4 that rotatably supports the winding shaft and is fixed to a second vertical opening frame 52 on the opposite side of a building opening frame 50 from a first vertical opening frame 51 with which the vertical window frame is in contact, a movable frame 7 attached to the other end of the screen, a winding mechanism that accumulates a biasing force in a direction to wind up the screen when the screen is unwound from the winding shaft, and an operating cord 11 whose first end is connected to the movable frame 7 and whose second end side is connected to an external operating unit 10 through the inside of the frame body 15. The operating cord is movably inserted into the frame body, and a locking mechanism that prevents or allows movement of the operating cord in the direction in which the tension acts is provided in the frame body.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a roll screen device for installation on the outer surface of a window that is opened in a form that slopes and protrudes outward from a building opening, and an installation structure thereof.

Background Art

[0002] In a building opening, for example, as disclosed in Patent Document 1, it is already known to install a light-shielding screen on the outside of a window through which sunlight enters, such as the afternoon sun in summer. By the way, in this type of screen device, in order not to interfere with the opening and closing of the window to the outside, a screen winding box is installed at a position near the tip of the eaves provided above the window, and a mechanism that enables the stretching operation of the screen to be performed from the indoor side is adopted. There is a need.

[0003] However, in such an installation structure of the screen device, since it is necessary to secure a distance considering the opening and closing of the window to the outside between the building opening and the stretching position of the screen, depending on the orientation of the building opening and the position of the sun, etc. There is a possibility that the sunlight entering the room cannot be sufficiently blocked.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] A technical problem of the present invention is to provide a roll screen device for installation on the outside of a window that is opened in a form that slopes and protrudes outward from a building opening, and an installation structure thereof, regardless of the orientation of the building opening and the position of the sun. It is to provide something that can suppress the incidence of sunlight into the room as much as possible.

Means for Solving the Problems

[0006] In order to solve the above problems, a roll screen device according to the present invention is a roll screen device for installation on the outer surface of a window that is opened in a form that protrudes obliquely by rotating outward from a building opening frame, and includes a screen having one end attached to a winding shaft and being wound around the winding shaft, a frame body for fixing to an open-side window frame disposed on the open end side among window frames provided around the window, a winding box in which the winding shaft is rotatably supported internally around an axis and is fixed to a second opening frame on the opposite side of the first opening frame where the open-side window frame in the building opening frame contacts, a movable frame attached to the other end of the screen, a winding mechanism in which a biasing force in the winding direction of the screen is accumulated when the screen is fed out from the winding shaft by the movement of the movable frame, and an operating string having a longitudinal first end connected to the movable frame and a second end side connected to an external operating portion through the frame body. The operating string is inserted into the frame body so as to be movable in its longitudinal direction, and the frame body is provided with a locking mechanism capable of selectively blocking or allowing the movement of the operating string.

[0007] In this case, preferably, the operating string is formed by two string bodies. The frame body has a first opening and a second opening that communicate internally at one longitudinal end side and the other end side thereof, and a third opening that also communicates internally is provided between the first opening and the second opening. The first ends of the two string bodies are connected to positions on one end side and the other end side of the longitudinal center of the movable frame. The second end sides are introduced into the frame body from the first opening and the second opening provided at one longitudinal end side and the other end side of the frame body, inserted inward in the longitudinal direction by turning by a turning member, and then led out to the outside from the third opening through the locking mechanism. At the second end, the two string bodies are connected to one operating portion.

[0008] Also preferably, a tension due to the biasing force of the winding mechanism acts on the operation knob, and the locking mechanism is configured to selectively block or allow the movement of the operation knob in the direction of the tension.

[0009] Also preferably, the locking mechanism is rotatably supported by a rotating shaft, and includes a turning roller that turns one of the two string bodies toward the third opening side, a turning portion that turns the other string body toward the third opening side, and a locking roller that is rotatably and movably disposed in a storage space that opens to the turning roller side on the third opening side of the turning portion. According to the acting direction of the tension on the operation knob, the operation knob is clamped between the turning roller and the locking roller to lock the movement in the acting direction of the tension, or the distance between these rollers is separated to allow the movement of the operation knob in the acting direction of the tension.

[0010] Also preferably, the first ends of the two string bodies in the operation knob are connected to portions disposed outside both sides of the screen at both end portions of the movable frame.

[0011] In addition, the installation structure of the roll screen device according to the present invention is an installation structure of a roll screen device on the outer surface of a window that is opened in a form that protrudes obliquely by rotating outward from a building opening frame, and the roll screen device includes a screen having one end attached to a winding shaft and being wound around the winding shaft, a winding box in which the winding shaft is rotatably supported around its axis inside, a movable frame attached to the other end of the screen, a winding mechanism that accumulates a biasing force in the winding direction of the screen when the screen is fed out from the winding shaft by the movement of the movable frame, and an operating string having a longitudinal first end connected to the movable frame and a second end connected to an operating portion. An intermediate portion between the first end and the second end of the operating string is inserted through a frame body fixed to an open-side window frame arranged on the open end side of a window frame provided around the window so as to be movable in its longitudinal direction. The winding box is fixed to a second opening frame on the side opposite to a first opening frame with which the open-side window frame in the building opening frame is in contact. Further, the frame body is provided with a lock mechanism capable of selectively blocking or allowing movement of the operating string in the direction of the tension force thereof. It is characterized by the above.

Effects of the Invention

[0012] According to the roll screen device and its installation structure according to the present invention, since the roll screen device can be directly installed on the outer surface of a window that is opened in a form that protrudes obliquely from a building opening frame and its opening and closing operation can be performed from the indoor side, it is possible to suppress the incidence of sunlight into the room as much as possible regardless of the orientation of the building opening and the position of the sun.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0014] Figures 1 - 5 show an embodiment of the installation mechanism of a roll screen device according to the present invention. The installation mechanism of the roll screen device according to this embodiment is for installing a roll screen device on the outer surface of a window that is opened in a form that protrudes obliquely by rotating outward from a building opening frame. This installation mechanism is suitable, for example, when installing a screen for shading (sunshade) outside a special window with a special window opening and closing method, such as a sliding window, and with limited opening direction and size of the opening. Note that the roll screen device is not limited to those for the purpose of shading, and can also be applied when used for purposes such as blocking the view.

[0015] First, an overview of the installation mechanism of the roll screen device 1 will be given. The installation mechanism of the roll screen device 1 includes a building opening frame 50 that is detachably attached in a form where the window 40 protrudes to the outdoor side, a window frame 41 provided around the window 40, and a roll screen device 1 arranged outside the window 40. Although details will be described later, the right end of the roll screen device 1 is fixed to the right end of the window frame 41, and the left end of the roll screen device 1 is fixed to the left end of the building opening frame 50. In the following description, "up and down" and "left and right" refer to the directions when viewing the building opening 49 from the indoor side, "front" is the outdoor side, and "rear" is the indoor side.

[0016] As shown in FIGS. 1 and 2, the building opening frame 50 is attached along the inner peripheral edge of the building opening 49. In this embodiment, the building opening frame 50 has an opening in a rectangular shape when viewed from the indoor side, and includes a first opening vertical frame 51 (first opening frame) and a second opening vertical frame 52 (second opening frame) that extend in the vertical direction, and a pair of horizontal frames 53 and 54 that connect the upper and lower ends of these opening vertical frames 51 and 52.

[0017] The rear portions of the first and second opening vertical frames 51 and 52 are attached to the side surfaces on both the left and right sides of the building opening 49, and the front portions of the first and second opening vertical frames 51 and 52 extend outward from the building opening 49 to the outside. Positioning protrusions 51a and 52a that protrude inward of the building opening 49 and extend in the vertical direction are formed on the rear portions of the first and second opening vertical frames 51 and 52.

[0018] Similar to the first and second opening vertical frames 51 and 52, the rear portions of the horizontal frames 53 and 54 are attached to the upper and lower surfaces of the building opening 49, and the front portions of the horizontal frames 53 and 54 protrude outward from the building opening 49 to the outside. Positioning protrusions 53a and 54a that protrude inward of the building opening 49 and extend in the lateral direction are formed on the rear portions of the horizontal frames 53 and 54. By the window frame 41 abutting against these protrusions 51a, 52a, 53a, and 54a, the positioning of the window 40 in the front-rear direction with respect to the building opening 49 is achieved.

[0019] Inside the front end portion of the building opening frame 50, a window accommodation space 56 that is surrounded by these first and second opening vertical frames 51 and 52 and the horizontal frames 53 and 54 and accommodates the window 40 is formed. In this embodiment, the window accommodation space 56 is formed in a rectangular shape when viewed from the outside.

[0020] The window 40 is formed in a rectangular shape as viewed from the outdoor side so as to close the building opening frame 50. The window frame 41 provided on the outer peripheral portion of the window 40 has a pair of vertical window frames 42, 43 and a pair of horizontal window frames 44, 45. The vertical window frames 42, 43 have vertical window frame bodies 42a, 43a attached to both side ends of the window 40, and vertical flange portions 42b, 43b that project outward in the left-right direction from the front ends of the vertical window frame bodies 42a, 43a and extend in the vertical direction. Further, the horizontal window frames 44, 45, similarly to the vertical window frames 42, 43, have horizontal window frame bodies 44a, 45a attached to the upper and lower ends of the window 40, and horizontal flange portions 44b, 45b that project outward in the vertical direction from the upper ends of the horizontal window frame bodies 44a, 45a and extend in the front-rear direction.

[0021] The window 40 thus formed is configured such that by operating an opening / closing mechanism including a handle 60 provided on the indoor side, the window 40 is pushed out to the outdoor side to open the building opening frame 50. The window 40 can move between a closed position P1 (see FIG. 1) where the window 40 contacts the front end face of the building opening frame 50 to close the building opening 49, and an open position P2 (see FIG. 6) where the window 40 rotates and moves forward while tilting to the right in the forward direction to open the window 40. At the closed position P1, the vertical and horizontal flange portions 42b, 43b, 44b, 45b of the window frame 41 contact the front end portion of the building opening frame 50, and the vertical window frame and horizontal window frame bodies 42a, 43a, 44a, 45a contact the front end portions of the positioning protrusions 51a, 52a, 53a, 54a of the building opening frame 50, thereby preventing the intrusion of outside air, rain, etc. into the indoor side.

[0022] Next, the roll screen device 1 will be described. As shown in FIGS. 2 and 3, the right end of the roll screen device 1 is arranged on the right side of a pair of vertical window frames 42, 43 and fixed to the vertical window frame 42 (open-side window frame), and the left end of the roll screen device 1 is fixed to a second opening building frame 52 arranged on the left side of the building opening frame 50.

[0023] The roll screen device 1 includes a screen 2 with one end attached to a winding shaft 5 and capable of being wound around the winding shaft 5, a frame body 15 for fixing to the vertical window frame 42 (open-side window frame) arranged on the open end side of the vertical window frames 42 and 43 of the window 40, a winding box 4 that rotatably supports the winding shaft 5 and is fixed to the second opening vertical frame 52 arranged on the left side of the building opening frame 50, a movable frame 7 attached to the other end of the screen 2, a winding mechanism 9 that accumulates a biasing force in the winding direction of the screen 2 when the screen 2 is drawn out from the winding shaft 5 due to the movement of the movable frame 7, and an operating string 11 with its longitudinal first end connected to the movable frame 7 and its second end side connected to an external operating portion 10 through the frame body 15.

[0024] The screen 2 has a size that covers the front surface of the window 40 in a state where it is drawn out from the winding shaft 5 and expanded by the movement of the movable frame 7. The winding box 4 has a hollow interior that extends in the vertical direction, and a winding shaft 5 rotatably supported around an axis L extending in the vertical direction is accommodated in the winding box 4. In this embodiment, a lead-out port 6 for leading out the screen 2 is provided on the left side surface of the winding box 4 (see FIG. 4). Since the winding mechanism 9 provided in the winding box 4 is well-known in the art, its description is omitted.

[0025] As shown in FIGS. 3 and 4, the movable frame 7 is attached to the tip portion (the other end) in the drawing-out direction of the screen 2 so as to extend in the vertical direction, and the screen 2 is attached to the intermediate portion in the vertical direction of the movable frame 7. In this embodiment, the movable frame 7 has substantially the same height as the winding box 4.

[0026] The frame body 15 has a hollow interior and extends in the vertical direction. In this embodiment, the frame body 15 is formed in a rectangular parallelepiped shape with a rectangular cross-section that extends in the vertical direction and has substantially the same height as the movable frame 7. On the left side surfaces of the upper and lower ends of the frame body 15, a first opening 16 and a second opening 17 that communicate with the interior are provided, and on the right side surface of the middle part in the vertical direction of the frame body 15, a third opening 18 that communicates with the interior is provided. Inside the upper and lower ends of the frame body 15, rotors 19, 20 that are rotatably supported around a rotation axis extending in the front-rear direction are provided.

[0027] The operation string 11 is formed by two first string bodies 12 (string bodies) and a second string body 13 (string body). The first ends 12a, 13a of these first and second string bodies 12, 13 are connected to the right side surfaces of the upper and lower ends outside the screen 2 of the movable frame 7. The second end 12b, 13b sides are introduced into the frame body 15 from the first and second openings 16, 17 of the frame body 15, and after being inserted inward in the vertical direction by the turning of the rotors 19, 20, they are led out to the outside from the third opening 18 through the locking mechanism 22, and the first and second string bodies 12, 13 are connected to one operation part 10 at the second ends 12b, 13b. Tensions f, f due to the biasing force of the winding mechanism 9 act on the first and second string bodies 12, 13. The operation string 11 is formed of, for example, a material (e.g., a synthetic resin material) having flexibility and high corrosion resistance. Also, the operation part 10 may be any that is easy for an operator to grip and operate, and is, for example, formed in a spherical shape.

[0028] As shown in FIGS. 3 and 5, the locking mechanism 22 is configured to selectively block or allow the movement of the first and second string bodies 12 and 13 in the acting directions of the tensions f and f. Specifically, the locking mechanism 22 is rotatably supported around a rotation axis extending in the front-rear direction, and includes a turning roller 23 that turns the first string body 12 toward the third opening 18 side, a turning portion 24 that turns the second string body 13 toward the third opening 18 side, and a locking roller 25 that is housed in a housing space 27 that opens toward the turning roller 23 side on the third opening 18 side of the turning portion 24 and is capable of rotating and moving. In the present embodiment, the turning portion 24 is disposed above the turning roller 23 and to the left of the locking roller 25, and has a side surface 24a extending in the vertical direction and a curved surface 24b that curves and extends from the lower portion of the side surface 24a toward the third opening 18 side. The curved surface 24b protrudes toward the operation string 11 side.

[0029] The locking roller 25 is disposed at a position above the turning roller 23 and closer to the third opening 18 side. The housing space 27 extends from its bottom upward in a direction inclined toward the third opening 18 side, and a curved surface 28 that curves convexly toward the third opening 18 side and extends upward is formed on the third opening 18 side of the bottom. On the inner surface of the housing space 27 on the turning portion 24 side, a rotation suppression surface 27a having irregularities for suppressing the rotation of the locking roller 25 by engaging the protrusions of the locking roller 25 when the locking mechanism 22 is locked is provided. The locking roller 25 moves up and down in the housing space 27 along the curved surface 28 in accordance with the movement of the first and second string bodies 12 and 13 to lock or release the movement of the operation string 11.

[0030] The turning roller 23 is made of a slippery material (e.g., plastic) to facilitate the movement of the first string body 12. The locking roller 25 is made of a metal material (e.g., stainless steel) with a number of protrusions on its surface so that it can reliably lock the movement of the operating string 11 while clamping the operating string 11 between it and the turning roller 23. In this embodiment, by providing a number of protrusions on the surface of the turning roller 23 as well, the movement of the operating string 11 can be more reliably locked while the operating string 11 is clamped between the turning roller 23 and the locking roller 25.

[0031] Next, the operation of the locking mechanism 22 will be described. First, when feeding out the screen 2, as shown in FIGS. 3 and 5(a), with the operation part 10 moved downward with respect to the third opening 18, against the tensions f, f that pull the first and second string bodies 12, 13 toward the winding mechanism 9 by the biasing force of the winding mechanism 9, the operation part 10 is pulled obliquely downward. Therefore, the first and second string bodies 12, 13 extending between the locking roller 25 and the turning roller 23 are pressed against the turning roller 23 with an increased contact area, and are in a state of being separated from the lower part of the locking roller 25. Then, when the first and second string bodies 12, 13 move obliquely downward, the locking roller 25 rotates in the direction of arrow A (counterclockwise) and is displaced upward along the curved surface 28. As a result, the locked state with respect to the operating string 11 is released. Then, when the operation part 10 is further pulled downward, the screen 2 can be fed out from the winding shaft 5 via the movable frame 7 connected to the operating string 11.

[0032] On the other hand, when winding back the fed-out screen 2, with the lock of the operating string 11 released as shown in FIG. 5(a), as shown in FIGS. 3 and 5(b), the pulling operation by the operation part 10 is stopped. When the pulling operation stops, the first and second string bodies 12, 13 are moved in the acting direction of the tensions f, f by the tensions f, f acting on the first and second string bodies 12, 13 toward the winding mechanism 9 side. Therefore, the screen 2 can be wound back onto the winding shaft 5.

[0033] Also, when locking the movement of the screen 2, as shown in FIG. 5(c), the operation unit 10 is moved upward so that the operation string 11 extending from the third opening 18 extends in the horizontal direction. When the operation string 11 extends in the horizontal direction, due to the tensions f, f acting on the first and second string bodies 12, 13 and facing the winding mechanism 9 side, the first and second string bodies 12, 13 passing between the turning roller 23 and the locking roller 25 move from the third opening 18 side to the first and second opening 16, 17 sides. As a result, the locking roller 25 is displaced downward toward the turning roller 23 side along the curved surface 24b while rotating in the direction of arrow B (clockwise). Also, the protrusion of the locking roller 25 engages with the unevenness of the rotation suppression surface 27a, suppressing the rotation of the locking roller 25. Therefore, the operation string 11 is sandwiched between the locking roller 25 and the turning roller 23, and the movement of the operation string 11 is locked.

[0034] In this way, the locking mechanism 22 is configured to prevent the movement of the first and second string bodies 12, 13 in the acting direction due to the tensions f, f acting on them when moving the operation string 11 extending outward from the third opening 18 downward, and to allow the movement of the first and second string bodies 12, 13 in the acting direction due to the tensions f, f when moving these string bodies 12, 13 to extend in the horizontal direction.

[0035] Next, the operation of the roll screen device 1 when the screen 2 is deployed outside the window 40 will be described. As shown in FIG. 6, the handle 60 is operated to move the window 40 to the open position P2 where it is opened. At this time, the movable frame 7 is in contact with the side surface of the winding box 4, and the locking mechanism 22 is in the unlocked state. Then, as shown in FIG. 7, the operation unit 10 located outdoors is gripped from the indoor side and pulled indoors. At this time, the operation string 11 is pulled in a state of extending downward from the third opening 18. As a result, the first and second string bodies 12 and 13 of the operation string 11 extend outward from the third opening 18 of the frame body 15, and the screen 2 is drawn out from the winding shaft 5. When the movable frame 7 comes into contact with the frame body 15, the pulling operation of the operation unit 10 is stopped. Then, by moving the operation unit 10 upward to lock the locking mechanism 22, the screen 2 is maintained in a state of being deployed along the outer surface of the window 40. Then, as shown in FIG. 8, the handle 60 is operated to close the window 40.

[0036] On the other hand, the operation of the roll screen device 1 when the screen 2 is wound up in a state where the screen 2 is deployed outside the closed window 40 will be described. First, the handle 60 is operated to move the window 40 to the open position P2. Then, the operation unit 10 located outdoors is gripped from the indoor side and pulled indoors. As a result, after the locking mechanism 22 changes from the locked state to the unlocked state, when the pulling operation by the operation unit 10 is stopped, the screen 2 is wound back onto the winding shaft 5 by the biasing force of the winding mechanism 9.

Description of Reference Numerals

[0037] 1 Roll screen device 2 Screen 4 Winding box 5 Winding shaft 7 Movable frame 9 Winding mechanism 10 Operation unit 11 Operation string 12 First string body (string body) 12a, 13a First end 12b, 13b Second end 13 Second string body (string body) 15 Frame 16 First Opening 17 Second Opening 18 Third Opening 19, 20 Armature 22 Lock Mechanism 23 Steering Roller 24 Steering Section 25 Locking Roller 40 Window 41 Window Frame 42 Vertical Window Frame (Open-Side Frame) 50 Building Opening Frame 51 First Opening Vertical Frame (First Opening Frame) 52 Second Opening Vertical Frame (Second Opening Frame) f Tension L Axis

Claims

1. A roll screen device for installation on the outer surface of a window that is opened in a form that tilts and protrudes by rotation outward from a building opening frame, a screen having one end attached to a winding shaft and being windable around the winding shaft; a frame body for fixing to an open-side window frame arranged on the open end side of a window frame that surrounds the window; a winding box in which the winding shaft is rotatably supported around its axis inside and is fixed to a second opening frame on the side opposite to a first opening frame with which the open-side window frame in the building opening frame is in contact; a movable frame attached to the other end of the screen; a winding mechanism in which a biasing force in the winding direction of the screen is accumulated when the screen is fed out from the winding shaft by the movement of the movable frame; and an operating string having a longitudinal first end connected to the movable frame and a second end side connected to an external operating part through the frame body, the operating string is inserted into the frame body so as to be movable in its longitudinal direction, the frame body is provided with a locking mechanism capable of selectively blocking or allowing the movement of the operating string, A roll screen device characterized by the above.

2. the operating string is formed by two string bodies, the frame body has a first opening and a second opening that communicate internally at one longitudinal end side and the other end side thereof, and a third opening that also communicates internally is provided between the first opening and the second opening, the first ends of the two string bodies are connected to positions on one end side and the other end side of the longitudinal center of the movable frame, the second end sides are introduced into the frame body from the first opening and the second opening provided at one longitudinal end side and the other end side of the frame body, are inserted inward in the longitudinal direction by turning by a turning member, and then are led out to the outside from the third opening through the locking mechanism, and the two string bodies are connected to one operating part at the second ends, The roll screen device according to claim 1, characterized by the above.

3. Tension due to the biasing force of the winding mechanism acts on the operation knob, The locking mechanism is configured to selectively block or allow movement of the operation knob in the direction of the tension acting thereon. The roller screen device according to claim 2, characterized in that.

4. The locking mechanism is rotatably supported by a rotating shaft, and includes a turning roller that turns one of the two cord bodies toward the third opening side, a turning portion that turns the other cord body toward the third opening side, and a locking roller that is rotatably and movably disposed in a storage space that opens to the turning roller side on the third opening side with respect to the turning portion. Depending on the direction of the tension acting on the operation knob, the operation knob is clamped between the turning roller and the locking roller to lock the movement in the direction of the tension, or the distance between these rollers is separated to allow the movement of the operation knob in the direction of the tension. It is configured as follows. The roller screen device according to claim 3, characterized in that.

5. The first ends of the two cord bodies in the operation knob are connected to portions disposed outside both sides of the screen at both ends of the movable frame. The roller screen device according to any one of claims 2 to 4, characterized in that.

6. An installation structure of a roller screen device for the outer surface of a window that is opened in a form that protrudes obliquely by rotating outward from a building opening frame, The roller screen device includes a screen that is attached to a winding shaft at one end and can be wound around the winding shaft, a winding box in which the winding shaft is rotatably supported around its axis inside, a movable frame attached to the other end of the screen, and a winding mechanism that accumulates a biasing force in the winding direction of the screen when the screen is fed out from the winding shaft by the movement of the movable frame. It has an operation knob whose longitudinal first end is connected to the movable frame and whose second end is connected to an operation portion. Within the frame body fixed to the open-side window frame arranged on the open-end side among the window frames surrounding the window, an intermediate portion between the first end and the second end of the operation string is inserted movably in its longitudinal direction. The winding box is fixed to the second opening frame on the side opposite to the first opening frame with which the open-side window frame in the building opening frame is in contact. Furthermore, the frame body is provided with a lock mechanism capable of selectively preventing or allowing movement of the operation string in the acting direction of the tension of the operation string. The installation structure of the roll screen device is characterized by this.

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