Screen device

Abstract

To provide a screen device with excellent operability, without the risk of a person getting caught in a cord, and without confusing the opening / closing direction of the screen.SOLUTION: A screen device 1 includes: a winding box 10 having a winding shaft 11; a screen 2 connected to the winding shaft and led out from the winding box; and a movable frame 3 provided at a tip of the same. The screen device 1 further includes: a first pulley 13c connected to the winding shaft; a first storage frame body 30 extending downward from an end of the winding box; a first cord 35 engaging with the first pulley, housed in the first storage frame body from an upper end of the first storage frame body, and rotating the first pulley in a screen winding direction by downward operation; and an operation unit 40 attached to the first cord, movable up and down on the first storage frame body, and operating the first cord downward by moving downward. A first weight W1 is attached to the first cord, and the operation unit has a handle unit 41 disposed in a hole formed in a side wall 31 of the first storage frame body and allowing the operation of the first cord.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a winding screen device that is attached to a building opening for insect prevention, light shielding, heat insulation, blindfolding, etc., and particularly to a vertical-opening winding screen device that opens and closes in the vertical direction by winding a screen around a winding shaft or feeding it out from the winding shaft.

Background Art

[0002] A vertical-opening winding screen device that opens and closes in the vertical direction by winding a screen around a winding shaft or feeding it out from the winding shaft is known, for example, as disclosed in Patent Document 1. This type of screen device has a winding shaft rotatably supported upward, a screen wound around the winding shaft, and a cord for rotating the winding shaft to open and close the screen.

[0003] In the screen device disclosed in Patent Document 1, a sprocket is attached to one end of the winding shaft, a cord is looped around the sprocket, and when the front or rear part of the cord is selectively operated downward, the winding shaft is rotated forward or backward via the sprocket, thereby opening and closing the screen.

Prior Art Documents

Patent Documents

[0004]

Patent Document ①

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in the screen device disclosed in Patent Document 1, the operability is poor, for example, the winding shaft may be rotated in the reverse direction by mistake in selecting between the front and rear parts of the cord, and pets and people are likely to get caught on the looped cord.

[0006] Therefore, the technical problem of the present invention is to provide a screen device that is free from the risk of people tripping over the cord and offers excellent operability, preventing users from mistakenly opening or closing the screen in the wrong direction. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a screen device comprising: a winding box having a winding shaft rotatably supported inside; a screen whose base end is connected to the winding shaft and whose tip is led out from the winding box and is movable in the vertical direction; and a movable frame connected to the tip of the screen, wherein the screen is stored in the winding box when the screen is wound onto the winding shaft, and the screen is led out downward from the winding box when the screen is unwound from the winding shaft, and further comprising: a first rotational transmission body connected to one end of the winding shaft in the axial direction; a hollow first housing frame extending downward from the end of the winding box on the side where the first rotational transmission body is located; and the first rotational transmission body The device comprises a first cord that is engaged around the axis of the transmission body and housed inside the first housing frame from the upper end of the first housing frame, and which rotates the first rotary transmission body in a direction that winds up the screen when operated downward, and an operating part that is attached to the first cord and is movable in the vertical direction relative to the first housing frame, and which operates the first cord downward when moved downward, wherein the first rotary transmission body is rotated in a direction that winds up the screen when the operating part is operated, a first weight is attached to the first cord to assist in the rotation of the first rotary transmission body when the operating part is operated, a hole extending in the vertical direction is provided in the side wall of the first housing frame, and the operating part has a handle portion that is positioned in the hole and used for operating the first cord.

[0008] In this case, preferably, the handle portion protrudes from the hole portion to the outside of the first housing frame.

[0009] Preferably, the screen device further comprises a second rotational transmission body connected to the other axial end of the winding shaft in the winding box, a hollow second housing frame extending downward from the end of the winding box on the side where the second rotational transmission body is located, and a second cord engaged around the axis of the second rotational transmission body and housed inside the second housing frame from the upper end of the second housing frame, wherein a second weight is attached to the second cord to assist in the rotation of the second rotational transmission body when the operating unit is operated.

[0010] Preferably, the combined weight of the first and second weights is such that it stops the vertical movement of the screen when the operating unit is not being operated. Also preferably, the operating unit is detachable from the first and second cords, thereby allowing the operating unit to be selectively attached to the first housing frame or the second housing frame.

[0011] Preferably, one end of the first cord is connected to the winding box and suspended within the first housing frame, and is then folded back on a pulley provided on the handle portion to which the first weight is attached, thereby extending upward and being wrapped around the first rotating transmission body. [Effects of the Invention]

[0012] As described above, the present invention provides a screen device that eliminates the risk of people tripping over the cord and offers excellent operability, preventing users from mistakenly opening or closing the screen. [Brief explanation of the drawing]

[0013] [Figure 1] This is a partial cross-sectional front view of a screen device according to one embodiment of the present invention. [Figure 2] This is a bottom view of the screen device. [Figure 3] Figure 3(a) is a front view of the winding cap, and Figure 3(b) is a side view of the winding cap. [Figure 4]It is a cross-sectional view of the winding cap corresponding to the IV-IV arrow view of FIG. 3(a). [Figure 5] FIG. 5(a) is a side view of the pulley box, and FIG. 5(b) is a cross-sectional view of the pulley box corresponding to the V-V arrow view of FIG. 5(a). [Figure 6] FIG. 6(a) is a left side view of the operation part, and FIG. 6(b) is a front view of the operation part. [Figure 7] FIG. 7(a) is a plan view of the operation part, and FIG. 7(b) is a right side view of the operation part. [Figure 8] FIG. 8(a) is a plan view of the weight holder, FIG. 8(b) is a left side view of the weight holder, and FIG. 8(c) is a front view of the weight holder. [Figure 9] It is a cross-sectional explanatory view of the screen device corresponding to the IX-IX arrow view of FIG. 1 when the screen is in the closed state. [Figure 10] It is a cross-sectional explanatory view of the screen device corresponding to the IX-IX arrow view of FIG. 1 when the screen is in the state of moving to the intermediate position of opening and closing. [Figure 11] It is a cross-sectional explanatory view of the screen device when removing the first housing frame from the winding box. [Figure 12] It is a partial cross-sectional explanatory view of the screen device in the state where the first housing frame is removed from the winding box. [Figure 13] It is a partial cross-sectional explanatory view of the screen device in the state where the operation part and the first weight are removed from the first cord. [Figure 14] It is a partial cross-sectional explanatory view of the screen device for explaining another method of removing the operation part from the first cord. [Figure 15] FIG. 15(a) is a plan view of another operation part, FIG. 15(b) is a left side view of another operation part, and FIG. 15(c) is a front view of another operation part.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, a screen device according to an embodiment of the present invention will be described. The screen device of this embodiment is a vertically opening type screen device that opens and closes in the vertical direction by feeding out and winding up a screen for insect prevention, light shielding, eye concealment, heat insulation, etc. from a winding shaft.

[0015] As shown in FIG. 1, the screen device 1 includes a winding box 10 having a winding shaft 11 that is rotatably supported around an axis L1 extending in the axial direction (hereinafter referred to as the "left - right direction"), with one axial end being the left end and the other axial end being the right end; a screen 2 whose base end is connected to the winding shaft 11 and whose tip end is led out from the winding box 10 and is movable in the vertical direction; a movable frame 3 connected to the tip end of the screen 2; a first pulley (first rotation transmission body) 13c connected to the right end of the winding shaft 11; a hollow first housing frame body 30 extending downward from the end of the winding box 10 on the side where the first pulley 13c is arranged; a first cord 35 that engages around the axis of the first pulley 13c, extends downward, and is movably housed in the first housing frame body 30, and rotates the first pulley 13c in the direction of winding up the screen 2 by downward operation; and an operation portion 40 attached to the first cord 35 and movable in the vertical direction with respect to the first housing frame body 30, and operating the first cord 35 downward by moving it downward. In this embodiment, the screen device 1 is supported by a window frame 61 attached to a building opening 60, and the winding shaft 11 extends in the horizontal direction.

[0016] As shown in FIG. 2, the screen 2 moves up and down and opens and closes by guiding both the left and right ends thereof to a first frame body 5 and a second frame body 6, which will be described later. A large number of engaging members 2a, each composed of a half of a fastener used for clothes or the like, are attached to the side edges of the left and right ends of the screen 2. These engaging members 2a are movably engaged with the respective slits 5a and 6a of the first and second frame bodies 5 and 6, whereby the screen 2 is formed to be movable in the vertical direction along the first and second frame bodies 5 and 6. Further, the base end of the screen 2 is attached to the winding shaft 11, and a movable frame 3 having a function as a weight is attached to the tip end of the screen 2.

[0017] The movable frame 3 also functions as a handle that the user can grip when opening or closing the screen 2.

[0018] As shown in Figure 1, the winding shaft 11 is rotatably supported relative to the winding box 10 and has flanges 13b and 14b at both its left and right ends, which are supported by end caps 16 and 17, which will be described later. The winding shaft 11 has a cylindrical winding shaft body 12 and winding caps 13 and 14 attached to both the left and right ends of the winding shaft body 12, and the left and right winding caps 13 and 14 are identical in shape.

[0019] Therefore, with respect to the winding caps 13 and 14, the winding cap 13, which is located on the right side in the axial direction, will be described, and for the winding cap 14, which is located on the left side in the axial direction, parts identical to those of the winding cap 13 will be denoted by corresponding reference numerals and their description will be omitted. As shown in Figures 1, 3(a), 3(b), and 4, the winding cap 13 has a fitting portion 13a fitted inside the right end of the winding shaft body 12, a disc-shaped flange 13b formed on the right end of the fitting portion 13a, and a first pulley 13c formed on the right end face of the flange 13b into which the first cord 35 engages. The fitting portion 13a, flange 13b, and first pulley 13c are arranged on the same central axis L2 and are also arranged coaxially with the axis L1 of the winding shaft 11.

[0020] The flange 13b and the first pulley 13c are rotatably inserted into an end cap 16 attached to the right end of the winding box 10. The first pulley 13c has a hole 13d that penetrates along its central axis L2, and a support member 26 provided on the end cap 16 (described later) is inserted into a sliding bearing 9 inserted into this hole 13d, thereby supporting the right end of the winding shaft 11 so that it can rotate around the axis of the support member 26. In the winding cap 14 provided on the left side in the axial direction, the pulley corresponding to the first pulley 13c is referred to as the second pulley 14c.

[0021] The second pulley 14c of the winding cap 14, like the first pulley 13c, has a hole 14d that penetrates along its central axis L2, and a support member 26 provided on the end cap 17 (described later) is inserted into a sliding bearing 9 inserted into this hole 14d. As a result, the left end of the winding shaft 11 is supported so as to be rotatable around the axis of the support member 26.

[0022] As shown in Figures 1 and 9, the winding box 10 is formed in a hollow rectangular prism shape and comprises a hollow winding box body 15 with a rectangular cross-section that extends horizontally, and a pair of end caps 16 and 17 provided at both ends of the winding box body 15 and screwed to the winding box body 15. A screen outlet 15a extending in the left-right direction is formed on the lower surface of the rear side of the winding box body 15, and when the winding shaft 11 housed in the winding box 10 rotates about axis L1, the screen 2 wound around the winding shaft 11 is either unwound from the screen outlet 15a or wound onto the winding shaft 11.

[0023] As shown in Figures 1, 5(a), and 5(b), the end caps 16 and 17 are formed to be approximately the same shape and size as the openings at both ends of the winding box body 15, and rotatably support the left and right ends of the winding shaft 11, respectively. The end caps 16 and 17 are positioned relative to a plane that extends vertically through their center S. Symmetry Since it is configured as described above, the end cap 16 will be explained, and for the end cap 17, the same reference numerals will be used for parts of the same configuration and the explanation will be omitted.

[0024] The end cap 16 is rotatably housed the flange 13b and the first pulley 13c of the winding cap 13, and is formed to allow the first end 35a (see Figure 10) and the second end 35b (see Figure 10) of the first cord 35 to be led out from inside the winding box 10 to the outside.

[0025] The end cap 16 comprises a plate-shaped cap body 18, a first housing portion 19 and a second housing portion 20 provided on the inner surface of the cap body 18 for housing the flange 13b of the winding cap 13 and the first pulley 13c, a first outlet passage 21 opened on the front side of the cap body 18 for leading out the first end 35a of the first code 35 from the end cap 16, and a second outlet passage 22 opened on the rear side of the cap body 18 for leading out the second end 35b of the first code 35 from the end cap 16.

[0026] The first and second housing sections 19 and 20 are formed by an outer peripheral wall 23 erected in an annular shape on the inner surface of the cap body 18, with the point S at which the axis L1 intersects the cap body 18 as the center, an inner peripheral wall 24 located radially inward from the outer peripheral wall 23 and erected in an annular shape from the center S, and the cap body 18.

[0027] The outer peripheral wall 23 has openings on its rear side, below its center S, and on its front side, below its center S. The inner peripheral wall 24 also has openings on its rear side, below its center, and on its front side, below its center. Guide walls 25 are provided at the openings on the rear and front sides, respectively, to form the first and second outlet passages 21 and 22. A cylindrical support member 26 is provided protruding from the center S of the inner peripheral wall 24 of the cap body 18.

[0028] The inner diameter of the outer peripheral wall 23 is slightly larger than the outer diameter of the flange 13b, the height of the outer peripheral wall 23 is greater than the height of the inner peripheral wall 24, and the height difference between the outer peripheral wall 23 and the inner peripheral wall 24 is approximately the same as the thickness of the flange 13b. For this reason, a first housing portion 19 capable of accommodating the flange 13b is formed on the inside of the outer peripheral wall 23, and a second housing portion 20 capable of accommodating the first pulley 13c is formed on the inside of the inner peripheral wall 24.

[0029] The first outlet passage 21, as further explained with reference to Figure 10, is a passage for leading the first end 35a of the first cord 35 out of the winding box 10, and is positioned at the lower part of the outer circumferential surface on the front side of the first pulley 13c. The width of the first outlet passage 21 is formed to be slightly larger than the diameter of the ball member 36, which will be described later, and a downward-facing opening 27 is provided at the tip of this passage. Behind this opening 27, a ball housing chamber 28 is formed, which has a locking groove 28b as a locking part for locking the ball member 36. The locking groove 28b and the ball housing chamber 28 open toward the left end of the winding shaft 11, and the ball housing chamber 28 is sized to accommodate the ball member 36. Since the width of the locking groove 28b is smaller than the diameter of the ball member 36 and larger than the diameter of the connecting strip 37 of the first cord 35 (described later), the first end 35a of the first cord 35 can be detachably locked into the locking groove 28b.

[0030] The second outlet passage 22 is a passage for leading the second end 35b of the first cord 35 out of the winding box 10, and is positioned at the lower part of the outer peripheral surface on the rear side of the first pulley 13c. The second outlet passage 22 is inclined downward toward the rear side, and the width of the passage of the second outlet passage 22 is formed to be slightly larger than the diameter of the ball member 36, similar to the first cord outlet passage. An opening 29 is provided at the end of this passage, facing downward.

[0031] As shown in Figure 10, the first cord 35 is a flexible cord formed with ends, having a first end 35a and a second end 35b, and is constructed by connecting a number of ball members 36 at regular intervals with connecting strips 37, with both ends being formed in an ended shape without being connected to each other. The first end 35a (one end) of the first cord 35 is connected (locked) to the locking groove 28a of the end cap 16 and suspended inside the first housing frame 30, which will be described later. It is then folded back by the pulley 48 and extends upward to be wrapped around the first pulley 13c. On the other hand, the second end 35b of the first cord 35 is suspended from the first pulley 13c inside the second chamber 5e (see Figure 2) of the first frame 5, which will be described later. The cord wrapped around the second pulley 14c is the same as the first cord 35 described above and will be referred to as the second cord 38 below.

[0032] As shown in Figures 1 and 2, the first housing frame 30 is hollow and extends downward from the end of the winding box 10 on the side where the first pulley 13c is located. In this embodiment, the first housing frame 30 extends downward from the right end of the front side of the winding box 10. The first housing frame 30 is rectangular in cross-sectional view with an open upper end, and a hole 31a extending vertically is formed in the center of the width direction of the inward-facing side wall 31. This hole 31a extends from the upper end to the lower end of the side wall 31, and an operating part 40 for operating the vertical movement of the screen 2 is located in this hole 31a.

[0033] Furthermore, a second housing frame 32 extending downward is provided at the left end of the front side of the winding box 10. The second housing frame 32 is formed in the same way as the first housing frame 30, and a hole 33a extending in the vertical direction is formed in the center of the width direction of the side wall 33 facing inward.

[0034] As shown in Figures 1 and 9, the operating unit 40 is attached to the first cord 35 and is movable vertically relative to the first housing frame 30. By moving it downward, the first cord 35 is operated downward, thereby moving the screen 2 upward. In this embodiment, the operating unit 40 has a handle portion 41 that is movable along the hole portion 31a and used for operation, a pulley holder 45 connected to the handle portion 41 within the first housing frame 30, and a pulley 48 that is rotatably supported by the pulley holder 45.

[0035] As shown in Figures 1, 2, 6(a), 6(b), 7(a), and 7(b), the handle portion 41 comprises a handle 42 extending in a direction perpendicular to the left-right direction (hereinafter referred to as the "front-back direction"), a slide plate 43 extending vertically from the right end of the handle 42 and slidable along the side wall 31, and a protruding member 44 protruding from the back surface of the slide plate 43 through the hole 31a into the first housing frame 30 and connecting to the pulley holder 45. The slide plate 43 is formed in a vertically elongated rectangular shape, symmetrical in the vertical and front-back directions with respect to the center of the width direction of the handle 42, and the protruding member 44 extends vertically along the hole 31a. Therefore, with the protruding member 44 inserted into the hole 31a, the pulley holder 45 can be moved vertically by operating the handle 42 in the vertical direction.

[0036] The pulley holder 45 is circular in side view and is formed in a disc shape with thickness in the left-right direction. The upper end of the pulley holder 45 is open, and a hole 46 is formed inside that can accommodate the pulley 48. The upper part of the hole 46 is open not only at the upper end but also at the front-rear ends, and the lower part of the hole 46 is curved in a semicircular shape with its bottom surface protruding downwards. In side view, the pulley holder 45 has a through hole 47 that penetrates in the left-right direction (thickness direction) in its center, and with the pulley 48 inserted into the hole 46, the pin 49 (see Figure 13) is inserted through the through hole 47 and the hole 48a of the pulley 48 (see Figure 13), thereby supporting the pulley 48 so that it can rotate around the axis of the pin 49 within the pulley holder 45 (see Figure 9). In this embodiment, the pin 49 is detachably fitted into the through hole 47 and the hole 48a of the pulley. As shown in Figure 9, the pulley 48 is a pulley that can engage with the first code 35. On the outer circumferential surface of the pulley 48, claws 48b are formed protruding at equal intervals around the axis for transmitting force from the pulley 48 to the first code 35, and the ball members 36 of the first code 35 are engaged between adjacent claws 48b around the axis. Therefore, when the pulley 48 is moved vertically in conjunction with the up and down operation of the operating unit 40, the pulley 48 rotates, allowing the first code 35 to be operated vertically. Note that the pulley 48 is not limited to a pulley; it may also be a pulley with grooves on its outer circumferential surface that allow the first code 35 to slide around the axis.

[0037] A mounting portion 45a is formed at the lower part of the pulley holder 45 for detachably attaching the weight holder 50 by screw. As shown in Figures 1, 8(a), 8(b), and 8(c), the weight holder 50 is formed in the shape of a rectangular parallelepiped that is hollow inside and extends in the vertical direction, with its lower part and one side (left side) open to form a space 51 inside which the first weight W1 can be accommodated. The first weight W1 is mounted in this space 51. In this embodiment, the first weight W1 is detachably attached to the space 51 of the weight holder 50 via adhesive tape. The first weight W1 has a weight that can assist the rotation of the first pulley 13c when the operating unit 40 is operated to wind the screen 2 onto the winding shaft 11. In this embodiment, the first weight W1 has a weight that stops the vertical movement of the screen 2 when the operating unit 40 is not operated.

[0038] Next, the first frame 5 and the second frame 6 will be described. As shown in Figures 1 and 2, the first frame 5 is detachably connected to the right end of the winding shaft 11 on the rear side of the winding box 10, and the second frame 6 is detachably connected to the left end of the winding shaft 11 on the rear side of the winding box 10. The first frame 5 extends downward from the right end of the rear side of the winding box 10, and the second frame 6 extends downward from the left end of the rear side of the winding box 10. The first and second frame 5 and 6 are hollow frames, each having an opening at the upper end on the winding box 10 side, and their cross-sectional shape is rectangular. In this embodiment, the first housing frame 30 is connected to the front side of the first frame 5, and the second frame 6 teeth, The second housing frame 32 is connected to the side of the front side.

[0039] Furthermore, partition walls 5d and 6d extending vertically are provided inside the first and second frames 5 and 6, respectively. These partition walls 5d and 6d divide the interiors of the first frame 5 and the second frame 6 into two sections: first chambers 5b and 6b extending vertically opposite the left and right ends of the screen 2, and second chambers 5e and 6e located outside the first chambers 5b and 6b, respectively, and extending vertically. The opposing side walls of the first and second frames 5 and 6 are provided with vertically extending components to prevent the engagement member 2a of the screen 2 from coming loose. to Slidable slits 5a and 6a are provided. These slits 5a and 6a communicate with the first chambers 5b and 6b of the first frames 5 and 6, respectively, thereby allowing the head of the engaging member 2a to be slidably housed in the first chambers 5b and 6b.

[0040] In the second chamber 5e of the first frame 5, the second end 35b of the first code 35 is housed within the second chamber 5e from the upper end of the first frame 5. In this embodiment, the first frame 5 is positioned such that the outer peripheral surface on the back side of the first pulley 13c is located above the second chamber 5e. As a result, the second end 35b of the first code 35 is guided by the guide wall 25 (see Figure 5) and housed within the second chamber 5e. Similarly to the second chamber 5e of the first frame 5, the second end of the second code 38 is housed within the second chamber 6e from the upper end of the second frame 6.

[0041] Next, the opening and closing of the screen 2 in the screen device 1 of this embodiment will be described. As shown in Figures 1, 9, and 10, the screen device 1 is a device in which the screen 2 is wound onto the winding shaft 11 and opened by vertical operation of the operating unit 40, and the screen 2 is unwound from the winding shaft 11 and closed. To open the screen 2, as shown in Figure 10, the handle portion 41 of the operating unit 40 is moved downward, causing the first pulley 13c to rotate. This rotation of the first pulley 13c causes the winding shaft 11 to rotate, and the screen 2 moves upward while being wound onto the winding shaft 11, thereby opening the screen 2. At this time, since the first weight W1 is attached to the first cord 35 via the operating unit 40, the burden of downward operation on the operating unit 40 can be reduced. Alternatively, when opening the screen 2, the movable frame 3 may be grasped and moved upward. Even in this case, the first weight W1 attached to the first code 35 reduces the burden of upward operation on the movable frame 3.

[0042] On the other hand, when closing the screen 2, as shown in Figure 9, moving the handle portion 41 of the operating portion 40 upward causes the first pulley 13c to rotate. This rotation of the first pulley 13c causes the winding shaft 11 to rotate, and the screen 2 is unwound from the winding shaft 11 and moves downward, thereby closing the screen 2. At this time, since the first weight W1 is attached to the first cord 35 via the operating portion 40, it is possible to prevent the screen 2 from moving rapidly downward due to the weight of the movable frame 3. Alternatively, when closing the screen 2, the movable frame 3 may be grasped and moved downward. Even in this case, the first weight W1 attached to the first cord 35 can prevent the screen 2 from moving rapidly downward due to the weight of the movable frame 3.

[0043] Furthermore, as shown in Figures 9 and 10, the first cord has its first end 35a connected to the end cap 16 (winding box) 10 and suspended within the first housing frame 30. It is then folded back by a pulley 48 provided on the handle portion 41 to which the first weight W1 is attached, extending upward and looped around the first pulley 13c. As a result, when the handle portion 41 moves vertically, the screen 2 can be moved vertically by an amount approximately twice the vertical movement of the handle portion 41. This allows the screen 2 to be opened and closed more quickly with fewer operations on the operating unit 40.

[0044] As described above, according to the screen device 1 of this embodiment, the first cord 35 is housed in a first housing frame 30 that extends downward from the end of the winding box 10, and an operating unit 40 connected to the first cord 35 is provided on this first housing frame 30 so as to be vertically movable, and the first pulley 13c is rotated in the direction of winding up and unwinding the screen 2 in accordance with the vertical operation of the operating unit 40, so that the risk of a person or other object getting caught in the first cord 35 when operating the operating unit 40 can be prevented. Furthermore, since both opening and closing operations of the screen 2 can be performed using only the operating unit 40, there is no need to select the operating unit 40 according to the opening and closing operation of the screen 2. In addition, since the first weight W1 is attached to the first cord 35, the operating burden on the operating unit 40 when winding the screen 2 onto the winding shaft 11 can be reduced. Thus, a screen device 1 with excellent operability can be provided that eliminates the risk of a person or other object getting caught in the cord and prevents mistakes in the opening and closing direction of the screen 2.

[0045] The screen device 1 according to the present invention has been described above, but the present invention is not limited to the above embodiments. In cases where the screen 2 has a long vertical length, or where the width of the screen 2 and the width of the movable frame 3 (left-right direction) are large, the operation burden on the operating unit 40 when winding up the screen 2 may increase if only the first weight W1 attached to the first cord 35 is used. In such cases, a second weight W2 may be attached to the second cord 38 to assist in the rotation of the second pulley 14c. In this case, as shown in Figure 1, a weight holder support unit 53 is attached to the second cord 38 housed in the second housing frame 32, with the handle unit 41 omitted from the aforementioned operating unit 40. This weight holder support unit 53 is composed of a pulley 48 and a pulley holder 45 that supports it, and a weight holder 50 with the second weight W2 attached is attached to the lower part of the weight holder support unit 53.

[0046] In this way, by attaching the second weight W2 to the second cord 38 housed in the second housing frame 32 via the weight holder support 53, the first weight W1 and the second weight W2 work together to reduce the operating burden on the operating unit 40 when moving the screen 2 in the winding direction. The combined weight of the first weight W1 and the second weight W2 may be such that it stops the vertical movement of the screen 2 when the operating unit 40 is not being operated. This further reduces the operating burden on the operating unit 40 when moving the screen 2 in the winding direction.

[0047] By the way, in the screen device 1 described above, in which first and second weights W1 and W2 are provided on the first and second cords 35 and 38 that are wrapped around both the left and right ends of the winding shaft 11, the operating unit 40 is attached to the first housing frame 30, but this operating unit 40 may also be attached to the second housing frame 32. In order to attach the operating unit 40 to the second housing frame 32, as shown in Figures 11 to 13, first, the upper ends of the first housing frame 30 and the first frame 5 are removed from the winding box 10 (see Figure 11), and then the operating unit 40, weight holder 50, and first weight W1 housed in the first housing frame 30 are pulled out of the first housing frame 30, and the screen 2 is pulled out of the first frame 5 (see Figure 12). Then, the pin 49 is removed from the pulley holder 45 to separate the pulley 48 and the pulley holder 45 (see Figure 13). In this embodiment, the pulley 48 is left as the first code 35.

[0048] Meanwhile, the upper ends of the second housing frame 32 and the second frame 6 are removed from the winding box 10, and the second cord 38, weight holder support 53, and second weight W2 housed in the second housing frame 32 are pulled out of the second housing frame 32, while the screen 2 is pulled out of the second frame 6. Then, the pin 49 is removed from the pulley holder 45 to separate the pulley 48 from the pulley holder 45. In this embodiment, the pulley 48 is left attached to the second cord 38.

[0049] Next, the operating unit 40 (excluding the pulley 48), weight holder 50, and first weight W1, which were removed from the first code 35, are attached to the second code 38 inside the second housing frame 32. The process of attaching the operating unit 40 (excluding the pulley 48), weight holder 50, and first weight W1 to the second code 38 is the reverse of the process of removing them from the first code 35, so the explanation of the process is omitted. Then, the screen 2 is inserted into the second frame 6, and the upper ends of the second housing frame 32 and the second frame 6 are attached to the winding box 10.

[0050] Meanwhile, the weight holder support 53 (excluding the pulley 48), weight holder 50, and second weight W2, which were removed from the second code 38, are attached to the first code 35 inside the first housing frame 30. The process of attaching the weight holder support 53 (excluding the pulley 48), weight holder 50, and second weight W2 to the first code 35 is the reverse of the process of removing them from the second code 38, so the explanation of the process is omitted. Next, the screen 2, which was pulled out from the first frame 5, is inserted into the first frame 5. Finally, the upper ends of the first housing frame 30 and the first frame 5 are attached to the winding box 10, completing the exchange of the mounting position of the operating unit 40.

[0051] Incidentally, the operation of removing the operating part 40, weight holder 50, and first weight W1 from the first cord 35 is not limited to removing the pin 49 from the pulley holder 45. As shown in Figure 14, the first end 35a of the first cord 35 may be removed from the end cap 16 to free up one end of the first cord 35, and then the operating part 40 may be removed from the first cord 35 by pulling out the end of the first cord 35 that is wrapped around the pulley 48 (see Figure 12). The operation of removing the weight holder support part 53, weight holder 50, and second weight W2 from the second cord 38 is the same.

[0052] Furthermore, the operating section 40 of the above-described embodiment has a pulley holder 45 capable of housing a pulley 48, but is not limited to this. The operating section 40' may have a support plate 55 extending along the slide plate 43 at the tip of a protruding member 44, as shown in Figures 15(a), 15(b), and 15(c), and a locking portion 56 for detachably locking the first cord 35 is formed on the back surface of the support plate 55. In this embodiment, the locking portion 56 has a pair of projections 56a, 56a that are spaced apart in the vertical direction on the back surface of the support plate 55, and a groove 56b is formed at the tip of each of these projections 56a, 56a, into which the connecting strips 37 of the first cord 35 can be locked. The gap between the pair of projections 56a, 56a is large enough to accommodate the ball member 36 of the first cord 35. This operating section 40' is attached to the front operating section portion 35c, which is located on the front side (front side) of the first end 35a of the first cord 35 inserted into the first housing frame 30 and is operated in the vertical direction (see Figure 10).

[0053] In this way, by making the operating unit 40 selectively attachable to either the first housing frame 30 or the second housing frame 32, the operating unit 40 can be attached to either the first housing frame 30 or the second housing frame 32 depending on the environment in which the screen device 1 is installed and the ease of operation for the operator operating the operating unit 40. Therefore, the operability of the screen device 1 can be further improved. [Explanation of Symbols]

[0054] 1 Screen device 2 screens 3 Movable frame 10 reel boxes 11. Winding shaft 13c First pulley (first rotational transmission body) 14c Second pulley (second rotational transmission body) 30. First containment frame 31 Side wall 31a Hole 32. Second containment frame 35. First Code 38. Second Code 40 Control section 41 Handle 48 pulleys W1 First Hammer W2 Second Hammer

Claims

1. A screen device comprising: a winding box having a winding shaft rotatably supported inside; a screen whose base end is connected to the winding shaft and whose tip is led out from the winding box and is movable in the vertical direction; and a movable frame connected to the tip of the screen, wherein the screen is stored in the winding box when the screen is wound onto the winding shaft, and the screen is led out downward from the winding box when the screen is unwound from the winding shaft, A first rotational transmission body connected to one end of the winding shaft in the axial direction, A hollow first housing frame extending downward from the end of the winding box on the side where the first rotational transmission body is located, A first cord is engaged around the axis of the first rotational transmission body and housed inside the first housing frame from the upper end of the first housing frame, and rotates the first rotational transmission body in the direction of winding the screen by downward operation, The first cord is attached to the first cord and is movable vertically relative to the first housing frame, and has an operating unit that moves downward to operate the first cord downward, and the first rotation transmission body is rotated in the direction of winding up the screen by operating the operating unit, A first weight is attached to the first cord to assist in the rotation of the first rotational transmission body when the operating unit is operated. The side wall of the first housing frame has a hole extending in the vertical direction. The operating part has a handle portion that is positioned in the hole and used for operating the first cord. A screen device characterized by the following features.

2. The handle portion protrudes from the hole to the outside of the first housing frame. The screen device according to feature 1.

3. The aforementioned screen device, A second rotational transmission body connected to the other end in the axial direction of the winding shaft in the winding box, A hollow second housing frame extending downward from the end of the winding box on the side where the second rotational transmission body is arranged, The present invention further comprises a second cord that is engaged around the axis of the second rotational transmission body and is housed within the second housing frame from the upper end of the second housing frame, The second cord is fitted with a second weight to assist in the rotation of the second rotational transmission body when the operating unit is operated. The screen device according to feature 1.

4. The combined weight of the first and second weights is such that it stops the vertical movement of the screen when the operating unit is not being operated. The screen device according to feature 3.

5. The operating unit is detachable from the first code and the second code. This allows the operating unit to be selectively attached to the first housing frame or the second housing frame. The screen apparatus according to feature 3 or 4.

6. The first cord is connected at one end to the winding box and suspended within the first housing frame, and is further folded back on a pulley provided on the handle portion to which the first weight is attached, thereby extending upward and being wrapped around the first rotating transmission body. The screen device according to feature 1.

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