Roll screen

Abstract

To provide a roll screen which makes it difficult for creases to be formed in a screen.SOLUTION: The roll screen comprises: a winding pipe; the screen; a weight bar; and tension applying means. The winding pipe is supported in a rotatable manner. The screen has a top edge connected to the winding pipe to allow winding / unwinding. The weight bar is attached to a bottom edge of the screen. The weight bar being attached to the bottom edge of the screen allows the tension applying means to apply a tension, which is different from the tension applied by a load of the weight bar, on a width direction edge part of the bottom edge of the screen in an outward direction of the screen.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a roller blind. [Background technology]

[0002] 2. Description of the Related Art A conventional roller screen is known, for example, from Patent Document 1 below.

[0003] The roller blind shown in Patent Document 1 comprises a screen and a long weight bar with a space formed inside. A locking plate is attached to the bottom end of the screen, and the bottom end of the screen with the locking plate attached can be inserted into the weight bar to connect the bottom end of the screen to the weight bar. With this configuration, tension due to the load of the weight bar always acts on the screen. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Jpn. Jpn. Published No. 63-24785 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with this type of roll screen, there was a problem in that approximately V-shaped wrinkles could occur in the screen due to bending of the winding pipe to which the upper end of the screen is connected, the screen material, or the fabric structure that makes up the screen.

[0006] The present invention has been made in consideration of the above problems, and has an object to provide a roll screen that is less likely to develop wrinkles. [Means for solving the problem]

[0007] In order to achieve the above object, a roll screen according to one embodiment of the present invention comprises a winding pipe, a screen, a weight bar, and tensioning means. The winding pipe is rotatably supported. The upper end of the screen is connected to the winding pipe so as to be able to be wound and unwound. The weight bar is attached to the lower end of the screen. By attaching the weight bar to the lower end of the screen, the tensioning means applies a tension different from the tension due to the load of the weight bar to the width direction end of the lower end of the screen toward the outside of the screen.

[0008] With this configuration, by applying outward tension to the widthwise end of the lower end of the screen, it is possible to suppress the occurrence of wrinkles (particularly V-shaped wrinkles) on the screen. Furthermore, by providing a tension applying means, it is possible to prevent the winding of the screen from being hindered. "Applying outwardly to the screen" includes the horizontal, oblique, and vertical directions of the screen, and refers to the application of tension outward to the screen.

[0009] At least a portion of the tension applying means may be provided between the longitudinal end of the weight bar and the width direction end of the lower end of the screen.

[0010] The tension applying means may have a biasing member provided between the longitudinal end of the weight bar and the width direction end of the lower end of the screen, and the tension may be applied by the biasing force of the biasing member.

[0011] In this case, the tension applying means may further include an adjustment operation portion capable of adjusting the biasing force by expanding or contracting the biasing member.

[0012] The tension applying means may have an adjustment operation unit capable of applying the tension and adjusting the tension.

[0013] In this case, the adjustment operation unit has a cord arranged between the longitudinal end of the weight bar and the widthwise end of the lower end of the screen, and an operating member arranged to be able to operate to wind and unwind the cord, and the tension may be applied by operating the adjustment operation unit to tension the cord.

[0014] With these configurations, tension can be applied to the screen using the biasing member and the cord. Furthermore, the biasing force of the biasing member and the tension of the cord can be adjusted by operating the adjustment operation unit, so the tension can be flexibly adjusted according to the strength, thickness, size, etc. of the screen. Also, the tension applying means and adjustment operation unit can be realized without using the biasing member or cord, for example, by a structure in which a hook bolt is directly attached to the screen and tightened with a nut.

[0015] The tension applying means may have magnets or magnetic bodies provided at the longitudinal ends of the weight bar and at the widthwise ends of the lower end of the screen, and the tension may be applied by the magnetic force of the magnets or magnetic bodies.

[0016] This makes it possible to obtain the same effect as above with a simple structure that does not require an increase in the size of the device.

[0017] The roller screen may further include a cap attached to an end of the weight bar. In this case, the tension applying means may be at least partially provided within the cap.

[0018] This allows the tension applying means to be arranged using existing parts, and allows the tension applying means to be configured without compromising the design.

[0019] The tension applying means may have a weight member provided at an end in the width direction of the lower end of the screen so as to be receivable within the weight bar, and the tension may be applied by the load of the weight member.

[0020] The roller screen may further include a plate piece attached to a width direction end of the lower end of the screen. In this case, the tension applying means may be partially connected to the plate piece.

[0021] This allows tension to be applied to the entire surface to which the plate pieces are attached, which is expected to have the effect of preventing wrinkles that could occur if a large tension is applied to one point on the screen when the plate pieces are not provided. The plate pieces can be in various shapes such as rectangular, triangular, L-shaped, etc.

[0022] The roller blind may further include a long plate fixed to a lower end of the screen to connect the screen to the weight bar. In this case, the tension applying means may apply the tension at least outward in the width direction of the screen.

[0023] This is expected to have an effect of preventing wrinkles near the weight bar caused by thermal contraction of the plate fixed to the lower end of the screen.

[0024] The tension applying means may include a long, arch-shaped, elastically deformable connecting auxiliary member attached to the lower end of the screen, and a groove portion along the longitudinal direction formed in the weight bar, and the connecting auxiliary member may be inserted into the groove portion with the arch-shaped convex portion facing downwards, thereby applying the tension by elastically deforming in an approximately linear manner.

[0025] This makes it possible to generate tension by utilizing the elasticity (spring characteristics) of the auxiliary connection member.

[0026] The tensioning means may have the weight bar elastically deformable into an arch shape, and an attachment mechanism capable of attaching the weight bar to the lower end of the screen in a state in which the weight bar is elastically deformed, and the tension may be applied by the restoring force of the elastically deformed weight bar.

[0027] This allows tension to be generated by utilizing the elasticity (spring characteristics) of the weight bar itself.

[0028] The tension applying means may have a biasing member provided in the internal space of the weight bar and a connecting member connecting the biasing member to both widthwise ends of the lower end of the screen, and the tension may be applied by the biasing force of the biasing member.

[0029] The tension applying means may include the weight bar having a main body and a sliding part that is slidable in the longitudinal direction relative to the main body, a biasing member that biases the sliding part outward in the longitudinal direction, a slip-out prevention member provided at both widthwise ends of the lower end of the screen, and a locking part that is provided on the sliding part and can lock the slip-out prevention member, and the tension may be applied by the biasing force by engaging the anti-slip member with the locking part and releasing the sliding while the sliding part is slid inward in the longitudinal direction against the biasing force of the biasing member.

[0030] These configurations allow the internal space of the weight bar to be utilized to generate tension. Effect of the Invention

[0031] As described above, according to the present invention, it is possible to provide a roll screen that is less likely to cause wrinkles on the screen. However, this effect does not limit the present invention. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 is a front view of a roller blind in an unfolded (lowered) state according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a front view of a conventional roller blind in an unfolded (lowered) state. [Diagram 3] 1 is an exploded perspective view of the vicinity of an end of a weight bar of a roller screen according to a first embodiment of the present invention, and a longitudinal sectional view of the weight bar. FIG. [Figure 4] 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 13 is an exploded perspective view of the vicinity of an end portion of a weight bar of a roller screen according to a modified example of the first embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional view of the end of the weight bar in FIG. 5 in the short direction. [Figure 7] FIG. 11 is a diagram for explaining the effect of the roller blind according to the modified example of the first embodiment of the present invention. [Figure 8] FIG. 11 is a cross-sectional view in the short direction of an end portion of a weight bar of a roller screen according to a second embodiment of the present invention. [Figure 9] 13A and 13B are a plan view and a side view of a weight bar cap of a roller screen according to a third embodiment of the present invention. [Figure 10] FIG. 11 is a cross-sectional view in the short direction of an end portion of a weight bar of a roller screen according to a third embodiment of the present invention. [Figure 11] 13A is a front view of a lower end portion of a roller screen according to a modified example of the third embodiment of the present invention, and FIG. 13B is a cross-sectional view in the short side direction of an end portion of a weight bar. [Figure 12] FIG. 13 is an exploded perspective view of the vicinity of an end portion of a weight bar of a roller screen according to a fourth embodiment of the present invention. [Figure 13] 13 is a cross-sectional view of the end of the weight bar in FIG. 12 in the short direction. FIG. [Figure 14] FIG. 13 is a cross-sectional view in the short direction of an end portion of a weight bar of a roller screen according to a fifth embodiment of the present invention. [Figure 15] 13A and 13B are a front view and a longitudinal sectional view of a weight bar of a roller screen according to a sixth embodiment of the present invention, respectively. [Figure 16] FIG. 13 is a front view of the vicinity of a weight bar of a roller screen according to a seventh embodiment of the present invention. [Figure 17] FIG. 13 is a front view of the vicinity of a weight bar of a roller screen according to an eighth embodiment of the present invention. [Figure 18] 13 is an exploded front view of the vicinity of a weight bar of a roller screen according to a ninth embodiment of the present invention, and a cross-sectional view in the short side direction of the weight bar. FIG. [Figure 19]FIG. 13 is an exploded front view of the vicinity of a weight bar of a roller screen according to a tenth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0034] First Embodiment First, a first embodiment of the present invention will be described.

[0035] [Roller screen configuration] Fig. 1 is a front view of the roller blind according to this embodiment in an unfolded (lowered) state, and Fig. 2 is a front view of a conventional roller blind in an unfolded (lowered) state.

[0036] As shown in FIG. 1, the roller blind 100 has a set frame 1, a winding pipe 2, a screen 3, and a weight bar 4.

[0037] The set frame 1 is a member that supports the screen 3. As shown in Fig. 1, the set frame 1 is a long member that is fixed to a window frame or a wall (not shown) with screws or the like via brackets 5. Side plates 6 are provided on both ends of the set frame 1.

[0038] The winding pipe 2 is rotatably supported by the set frame 1, and supports the screen 3 so that it can be wound up and unwound. As shown in FIG. 1, one end of the winding pipe 2 is supported by one side plate 6 via a pulley 7, and the other end is rotatably supported by the other side plate 6. The winding pipe 2 and the pulley 7 rotate together. A loop-shaped operating chain 8 is wound around the pulley 7. The rotation of the pulley 7 is controlled by pulling down the front or rear side of the operating chain 8. Thus, the rotation of the winding pipe 2 is controlled.

[0039] The screen 3 has an upper end connected to the winding pipe 2 so as to be capable of being wound up and unwound. The screen 3 rises when wound up on the winding pipe 2, and falls when unwound from the winding pipe 2.

[0040] The weight bar 4 uses its weight to keep the screen 3 in a taut state. Caps 9 are attached to both ends of the weight bar 4.

[0041] Here, as shown in FIG. 2, conventional roll screens had a problem in that a roughly V-shaped wrinkle W1 could occur in the screen due to slight bending of the winding pipe to which the upper end of the screen is connected or an imbalance in the load applied to the screen.

[0042] Therefore, in this embodiment, the occurrence of wrinkles is suppressed by providing tension applying means 10 that applies a tension different from the tension caused by the load of the weight bar 4 to the width direction (X direction) end of the lower end of the screen 3 toward the outside of the screen 3 (see FIG. 1). Details of the tension applying means 10 will be described below. Here, "outside the screen 3" includes the width (horizontal), diagonal (downward), and vertical (downward) directions of the screen 3, and may be any direction in which the screen 3 is pulled outward.

[0043] [Details of tension application means] 3A is an exploded perspective view of the vicinity of the end of the weight bar 4 of the roller screen 100, and FIG. 3B is a longitudinal sectional view of the weight bar 4. FIG. 4 is a sectional view taken along line AA in FIG.

[0044] As shown in both figures, a bag-shaped portion 3a is formed at the bottom end of the screen 3, for example, by folding back a predetermined length and sewing, and the bag-shaped portion 3a houses a screen stopper plate 11. The screen stopper plate 11 is, for example, a long thin plate made of resin, and is provided over the entire length of the screen 3 in the width direction (X direction).

[0045] The weight bar 4 is internally divided into an upper space 42 and a lower space 43 by a partition plate 41, and the upper space 42 is configured to be able to accommodate the lower end of the screen 3. A groove 44 through which the screen 3 is inserted is formed at the top of the upper space 42.

[0046] The screen stopper plate 11 housed in the bag-shaped portion 3 a of the screen 3 is inserted into the upper space 42 of the weight bar 4 via a groove portion 44 .

[0047] The cap 9 also has an insertion portion 91 that is inserted into the openings (lower space 43) at both ends of the weight bar 4, and a closing portion 92 that closes the openings.

[0048] In this embodiment, the tension applying means 10 is provided between the longitudinal (X-direction) end of the weight bar 4 and the widthwise (X-direction) end of the lower end of the screen 3. Specifically, the tension applying means 10 has a spring (coil spring) 13 as a biasing member.

[0049] An attachment portion 93 is provided on the upper portion of the surface of the cap 9 facing the opening of the closing portion 92 so as to protrude inward in the longitudinal direction (X direction) of the weight bar 4. Furthermore, rectangular plate pieces 12, for example, are attached to both ends in the width direction (X direction) of the lower end of the screen 3 at positions adjacent to the screen stopper plate 11. One end of the spring 13 is attached to the attachment portion 93 of the cap 9, and the other end of the spring 13 is attached to the insertion hole of the plate piece 12 of the screen 3. The plate piece 12 can be various shapes other than rectangular, such as triangular or L-shaped.

[0050] With this configuration, the tension applying means 10 applies tension to the width direction (X direction) end of the lower end of the screen 3 outward in the width direction (arrow direction in Fig. 4) by the biasing force of the spring 13, thereby making it possible to suppress the occurrence of V-shaped wrinkles W1 (see Fig. 2) on the screen 3 as shown in Fig. 1. Furthermore, providing the tension applying means 10 makes it possible to prevent the winding of the screen 3 from being hindered.

[0051] Furthermore, by providing a part of the tensioning means 10 (mounting portion 93) inside the cap 9, the tensioning means 10 can be positioned using existing parts, and the tensioning means 10 can be constructed without compromising the design.

[0052] Furthermore, since tension is applied to the entire surface to which the plate piece 12 is attached, it is expected that this will have the effect of preventing wrinkles that could occur if a large tension were applied to one point on the screen 3 if the plate piece 12 were not provided.

[0053] [Modification of the first embodiment] Fig. 5 is an exploded perspective view of the vicinity of the end of the weight bar 4 of a roller screen 100 according to a modified example of the first embodiment. Fig. 6 is a cross-sectional view in the short direction of the end of the weight bar 4 in Fig. 5. Fig. 7 is a view for explaining the effect of the roller screen 100 according to the modified example.

[0054] In the first embodiment described above, the screen fixing plate 11 was housed in the bag-shaped portion 3a, but in this modified example, as shown in Figures 5 and 6, the screen fixing plate 11 is fixed to the lower end of the screen 3 by a plurality of staples S arranged at a predetermined interval.

[0055] When the screen fixing plate is stapled to the screen, in conventional roller screens, as shown in Figure 7(a), vertical wrinkles W2 can occur due to expansion and contraction (especially thermal contraction after molding) of the plastic screen fixing plate which is stapled at multiple points.

[0056] However, according to this modified example, the tension applying means 10 applies tension outward (in the direction of the arrow in the figure) in the width direction (X direction) of the screen 3, thereby suppressing not only the above-mentioned V-shaped wrinkles W1, but also wrinkles W2 near the weight bar 4 caused by thermal contraction of the screen stopper plate 11, as shown in the figure (b).

[0057] <Second embodiment> Next, a second embodiment of the present invention will be described. In this and subsequent figures, parts having the same configurations and functions as those in the first embodiment are given the same reference numerals, and the description thereof will be omitted.

[0058] FIG. 8 is a cross-sectional view in the short direction of an end portion of a weight bar 4 of a roller screen 100 according to this embodiment.

[0059] As shown in the figure, in this embodiment, the tension applying means 10 is the same as in the first embodiment in that it uses a spring 13, but instead of the mounting portion 93, it has an adjustment operating portion 14 that can adjust the spring force by expanding and contracting the spring 13.

[0060] The adjustment operation part 14 is, for example, a screw, and has an insertion hole through which one end of the spring 13 is inserted perpendicular to the axial direction. The biasing force of the spring 13 (the tension of the screen 3) can be increased by turning the adjustment operation part 14 clockwise with a screwdriver D, and the biasing force (the tension of the screen 3) can be decreased by turning the adjustment operation part 14 counterclockwise.

[0061] As described above, according to this embodiment, by adjusting the biasing force of the spring 13 by operating the adjustment operation unit 14, it is possible to flexibly adjust the tension according to the strength, thickness, size, etc. of the screen 3.

[0062] <Third embodiment> Next, a third embodiment of the present invention will be described.

[0063] Fig. 9 is a plan view (Fig. 9(a)) and a side view (Fig. 9(b)) of the cap 9 of the weight bar 4 of the roller screen 100 according to this embodiment. Also, Fig. 10 is a cross-sectional view in the short direction of the end of the weight bar 4 of the roller screen 100 according to this embodiment.

[0064] As shown in both figures, in this embodiment, the tension applying means 10 has a cord 15 and an adjustment operation unit 14.

[0065] That is, an insertion hole 94 is formed in the insertion portion 91 of the cap 9 in the vertical direction (Y direction), and an adjustment operating portion 14 serving as an operating member having a rotating knob at its lower end, a claw that protrudes from the rotating knob in a cantilever shape and is engageable with the upper end of the insertion hole 94 is inserted into and engaged with the insertion hole 94.

[0066] One end of a cord 15 is wound and connected to the upper end of the adjustment operation unit 14 protruding from the insertion hole 94 so that it can be wound and unwound, and the other end of the cord 15 is inserted and connected to the insertion hole of a plate piece 12 provided at the width direction (X direction) end of the lower end of the screen 3.

[0067] By rotating the rotating knob at the lower end of the adjustment operation unit 14 from the bottom side of the weight bar 4 (see the arrow in Figure 9(b)), the cord 15 is stretched and tension is applied diagonally downward (in the direction of the arrow in Figure 10) to the widthwise end of the screen 3.

[0068] As described above, according to this embodiment, tension can be applied to the screen 3 by utilizing the cord 15, and the tension of the cord can be adjusted by operating the adjustment operation unit 14, so that the tension can be flexibly adjusted according to the strength, thickness, size, etc. of the screen 3.

[0069] [Modification of the third embodiment] FIG. 11 is a front view (a) of the lower end of the screen 3 of a roller screen 100 according to a modified example of the third embodiment of the present invention, and a cross-sectional view (b) of the short side of the end of the weight bar 4.

[0070] As shown in the figure, in this modified example, the tensioning means 10 does not have a cord 15 as described above, but has a hook bolt 16 that is directly inserted into and engaged with the insertion hole 12a of the plate piece 12 at the lower end of the screen 3, an operating nut 17, and a fixing nut 18.

[0071] The hook bolt 16 has a hook portion 16a that engages with the plate piece 12 in the upper space 42 of the weight bar 4, and a threaded portion 16b that passes through the closing portion 92 of the cap 9 from the upper space 42 and extends to the outside of the cap 9. An operating nut 17 and a fixing nut 18 are screwed onto the threaded portion 16b. The operating nut 17 is rotatable on the threaded portion 16b, and the fixing nut 18 is fixed non-rotatably to the end of the threaded portion 16b.

[0072] When the operating nut 17 is rotated while holding the fixing nut 18 by hand, the distance between the fixing nut 18 and the operating nut 17 changes, so that the position of the hook portion 16a of the hook bolt 16 changes (see the white arrow in Figure 1(b)), and the tension (see the black arrow in Figure 1(b)) can be adjusted.

[0073] That is, in this modified example, the tension applying means 10 also serves as the adjustment operation unit 14, and is capable of applying tension and adjusting the tension.

[0074] In this manner, according to this modified example as well, tension can be applied to the screen 3 and the tension can be flexibly adjusted according to the strength, thickness, size, and the like of the screen 3.

[0075] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described.

[0076] Fig. 12 is an exploded perspective view of the vicinity of the end of the weight bar 4 of the roller screen 100 according to this embodiment, and Fig. 13 is a cross-sectional view in the short side direction of the end of the weight bar 4 in Fig. 12.

[0077] As shown in both figures, in this embodiment, the tension applying means 10 is realized by a magnet. That is, the tension applying means 10 has a flat mounting portion 95 formed on the upper part of the surface facing the opening of the closing portion 92 of the cap 9 and protruding inward in the longitudinal direction (X direction) of the weight bar 4, a rectangular plate-shaped magnet 19 provided on the mounting portion 95, and rectangular plate-shaped magnets 20 provided on both ends of the lower end of the screen 3 in the width direction (X direction). One of the magnet 19 and the magnet 20 may be a magnetic material.

[0078] With this configuration, as shown in Figure 13, magnet 20 on the screen 3 side is attracted to magnet 19 on the weight bar 4 side by magnetic force (see white arrow in the same figure), causing tension to act on the lower end of screen 3 in the direction of the black arrow in the same figure (outward in the Y direction).

[0079] In this manner, in this embodiment, with a simple structure that does not require an increase in the size of the device, tension is applied to the width direction (X direction) end of the lower end of the screen 3, thereby making it possible to suppress the occurrence of V-shaped wrinkles on the screen 3.

[0080] <Fifth embodiment> Next, a fifth embodiment of the present invention will be described.

[0081] FIG. 14 is a longitudinal cross-sectional view of an end portion of a weight bar 4 of a roller screen 100 according to this embodiment.

[0082] As shown in the figure, in this embodiment, the tension applying means 10 is realized by a weight. That is, the tension applying means 10 has a weight member 21 that is attached, for example, by adhesion to the width direction end of the lower end of the screen 3 so that it can be housed within the weight bar 4, and applies tension to the width direction (X direction) end of the lower end of the screen 3 by the load of the weight member 21.

[0083] In this manner, in this embodiment as well, with a simple structure that does not require an increase in the size of the device, tension can be applied to the width direction (X direction) end of the lower end of the screen 3, thereby suppressing the occurrence of V-shaped wrinkles on the screen 3.

[0084] Sixth Embodiment Next, a sixth embodiment of the present invention will be described.

[0085] Figure 15 is an exploded front view (Figure 15(a)) of the vicinity of the weight bar 4 of the roller screen 100 of this embodiment, a longitudinal cross-sectional view (Figure 15(b)) of the weight bar 4, and a front view (Figure 15(c)) of the vicinity of the weight bar 4.

[0086] As shown in the figure, in this embodiment, the tension applying means 10 has an auxiliary connection member 22 attached to the lower end of the screen 3 and a groove portion 45 formed in the weight bar 4.

[0087] As shown in FIG. 1(a), the auxiliary connection member 22 has, for example, a long cylindrical and arch shape, is elastically deformable, and is housed in a bag-shaped portion 3a at the lower end of the screen 3.

[0088] The groove portion 45 is provided along the longitudinal direction (X direction) of the weight bar 4, and as shown in the same figure (b), has, for example, a rectangular cylindrical shape, and its interior has a length in the Z direction approximately equal to the diameter of the above-mentioned connecting auxiliary member 22, and a length in the Y direction larger than the diameter of the above-mentioned connecting auxiliary member 22 and smaller than the height of its arch.

[0089] The auxiliary connection member 22 is inserted into the groove portion 45 while being housed in the bag-shaped portion 3a with the arch-shaped protrusion facing downward, and is elastically deformed from an arch shape to a substantially linear shape. As a result, both ends of the auxiliary connection member 22 are deformed downward from the center portion (see the white arrows in FIG. 1C), and a tension is applied downward (see the black arrows in FIG. 1C) to both ends in the width direction (X direction) of the lower end of the screen 3.

[0090] As described above, according to this embodiment, the elasticity (spring characteristics) of the auxiliary connection member 22 provided at the lower end of the screen 3 can be utilized to apply tension to the end of the lower end of the screen 3 in the width direction (X direction).

[0091] Seventh embodiment Next, a seventh embodiment of the present invention will be described.

[0092] FIG. 16 is a front view of the vicinity of the weight bar 4 of the roller blind 100 according to this embodiment.

[0093] As shown in the figure, in this embodiment, the tension applying means 10 has a bag-shaped portion 3a formed at the lower end of the screen 3, and a weight bar 4 housed in the bag-shaped portion 3a.

[0094] The bag-shaped portion 3a is firmly sewn on three sides (top, left, and right), and its longitudinal length is designed to be slightly smaller than the longitudinal length of the weight bar 4. The weight bar 4 has a long, straight shape and is elastically deformable. The bag-shaped portion 3a is an example of an attachment mechanism that can attach the weight bar 4 to the lower end of the screen 3 in a state where it is elastically deformed into an arch shape.

[0095] When the weight bar 4 is housed in the bag-shaped portion 3a in a state in which it has been elastically deformed from a straight shape into an arch shape, a restoring force that tries to return the weight bar 4 to a straight shape acts on the left and right ends of the bag-shaped portion 3a in the longitudinal direction (X direction) outward tension (see white arrows in the same figure), and as a result, a tension in the same direction (see black arrows in the same figure) acts on the widthwise (X direction) ends of the lower end of the screen 3.

[0096] As described above, according to this embodiment, the elasticity (spring characteristics) of the weight bar 4 itself can be utilized to generate tension at the lower end of the screen 3 in the width direction (X direction).

[0097] Eighth embodiment Next, an eighth embodiment of the present invention will be described.

[0098] FIG. 17 is an exploded front view (FIG. 17(a)) and a front view (FIG. 17(b)) of the vicinity of the weight bar 4 of the roller blind 100 according to this embodiment.

[0099] As shown in the figure, in this embodiment, the tension applying means 10 has a weight bar 4 that can be elastically deformed into an arch shape, a retaining member 23 provided at both ends in the width direction (X direction) of the lower end of the screen 3, and a locking portion 46 that is provided at both ends in the longitudinal direction (X direction) of the weight bar 4 and can lock the retaining member 23. Note that the screen stopper plate 11 and plate piece 12 provided in the above-mentioned embodiments are not provided in this embodiment.

[0100] The locking portion 46 is configured as a receiving portion having, for example, substantially the same shape as the retaining member 23, but other than that, various conventional locking structures such as projections and recesses, screws, etc. can be used.

[0101] In the above-mentioned seventh embodiment, the bag-shaped portion 3a was shown as an example of an attachment mechanism that can be attached to the lower end of the screen 3 while the weight bar 4 is elastically deformed into an arch shape, but in this embodiment, the above-mentioned anti-slip member 23 and the locking portion 46 are used as the attachment mechanism.

[0102] That is, when the weight bar 4 is elastically deformed into an arch shape as shown in FIG. 1A and the anti-slip member 23 is engaged with the engaging portion 46, a restoring force that attempts to return the weight bar 4 to a straight shape acts on the engaging portion 46 in a diagonal downward direction (see the white arrow in FIG. 1B), as a result of which a tension force (see the black arrow in FIG. 1B) acts on the width direction (X direction) end of the lower end of the screen 3 in the outward direction in the X direction.

[0103] In this manner, according to this embodiment as well, it is possible to generate tension at the lower end of the screen 3 in the width direction (X direction) by utilizing the elasticity (spring characteristics) of the weight bar 4 itself.

[0104] <Ninth embodiment> Next, a ninth embodiment of the present invention will be described.

[0105] FIG. 18 is an exploded front view ((a)) of the vicinity of the weight bar 4 of the roller blind 100 according to this embodiment, and a cross-sectional view ((b)) of the weight bar 4 in the short side direction.

[0106] As shown in the figure, in this embodiment, the tension applying means 10 has a spring 24 as a biasing member provided in the internal space of the weight bar 4, and two wires 25 as connecting members that connect the spring 24 to both ends of the lower end of the screen 3 in the width direction (X direction). The spring 24 may be of any structure as long as its ends are arranged at both ends of the weight bar 4, and as shown in the figure, a spring material having a length equivalent to the weight bar 4 may be used, or two spring materials may be arranged and fixed at both ends of the weight bar 4, respectively.

[0107] One end of each wire 25 is attached to both ends of the spring 24 against the spring force of the spring 24 (white arrow in Figure 1(a)), and the other end is attached to the insertion holes of the plate pieces 12 at both widthwise ends of the lower end of the screen 3.

[0108] The spring 24 is disposed in the lower space 43 of the weight bar 4, and both ends in the longitudinal direction (X direction) are disposed in the space of the insertion portion 91 of the cap 9. An insertion hole 96 for passing the wire 25 is provided in the upper part of the insertion portion 91 of the cap 9.

[0109] The biasing force of the spring 24 acts on the wire 25 (see the white arrow in FIG. 2B), and a tension force (see the black arrow in FIG. 2B) acts on the lower end of the screen 3 in the width direction (X direction) in a diagonally downward right direction.

[0110] In this manner, according to this embodiment, the internal space of the weight bar 4 can be utilized to generate tension at the lower end of the screen 3 in the width direction (X direction).

[0111] Tenth embodiment Next, a tenth embodiment of the present invention will be described.

[0112] FIG. 19 is an exploded front view of the vicinity of the weight bar 4 of the roller blind 100 according to this embodiment.

[0113] As shown in the figure, in this embodiment, the tensioning means 10 has a weight bar 4, a spring 26 as a biasing member provided in the internal space of the weight bar 4, a slip-out prevention member 23 provided at both ends of the lower end of the screen 3 in the width direction (X direction), and a locking portion 46 capable of locking the slip-out prevention member 23.

[0114] The weight bar 4 is composed of a main body 47 and two sliding parts 48 on both ends of the main body 47. The sliding parts 48 are slidable relative to the main body 47, and the springs 26 bias the sliding parts 48 outward in the longitudinal direction (X direction) of the weight bar 4.

[0115] The locking portion 46 is provided at the end of each sliding portion 48 opposite the main body portion 47 or closer to the main body portion than that end. The length between the two locking portions 46 when the weight bar 4 (sliding portion 48) is in a stationary state (non-sliding state) is designed to be slightly longer than the length between the two retaining members 23. The structure for locking the retaining members 23 to the locking portions 46 may be the same as that of the eighth embodiment described above, or any other structure may be used.

[0116] When the sliding portion 48 is slightly pressed into the main body portion 47 against the biasing force of the spring 26, the anti-slip member 23 is engaged with the locking portion 46 of the sliding portion, and the pressing is released, the sliding portion 48 slides in a direction in which it is pushed outward in the longitudinal direction (X direction) from the main body portion 47 by the biasing force of the spring 26 (see the white arrow in Figure 2(b)), and as a result, a tension is applied outward in the width direction (X direction) to the end portion of the lower end of the screen 3.

[0117] In this manner, according to this embodiment as well, tension can be generated at the lower end of the screen 3 in the width direction (X direction) by utilizing the internal space of the weight bar 4.

[0118] [Variations] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present technology.

[0119] The height and width of the roller blind 100 shown in each of the above-described embodiments can be changed as appropriate, and accordingly, the configuration of the tension applying means 10 and the tension applied thereby can also be changed as appropriate. [Explanation of symbols]

[0120] 2...Winding pipe 3. Screen 3a...Pacific part 4. Weight bar 9. Cap 10...Tensioning means 11...Screen stopper plate 12…Plate piece 12a...Through hole 13,24,26…Spring 14…Adjustment operation section 15…Code 16…Hook bolt 17…Operating nut 18…Fixing nut 19,20…Magnet 21... Weight member 22...Connection auxiliary parts 23...Prevention member 25…Wire 41...Partition plate 42...Upper space 43…Lower space 44,45…Groove 46…Latching part 47…Main body 48…Sliding part 91…insertion part 92...Occluded part 93,95…Mounting section 94,96…Through holes 100...Roller screen W1,W2…Wrinkles D…Driver S…Staple

Claims

1. A rotatably supported winding pipe; a screen having an upper end connected to the winding pipe so as to be capable of being wound and unwound; A weight bar attached to the lower end of the screen; a tension applying means for applying a tension different from the tension caused by the load of the weight bar to the width direction end of the lower end of the screen toward the outside of the screen by attaching the weight bar to the lower end of the screen; A roller blind equipped with:

2. The roller blind according to claim 1, At least a portion of the tension applying means is provided between the longitudinal end of the weight bar and the widthwise end of the lower end of the screen. Roller blind.

3. The roller blind according to claim 2, The tension applying means has a biasing member provided between the longitudinal end of the weight bar and the widthwise end of the lower end of the screen, and applies the tension by the biasing force of the biasing member. Roller blind.

4. The roller blind according to claim 3, The tension applying means further includes an adjustment operation portion capable of adjusting the biasing force by expanding or contracting the biasing member. Roller blind.

5. The roller blind according to claim 2, The tension applying means applies the tension and has an adjustment operation unit capable of adjusting the tension. Roller blind.

6. The roller blind according to claim 5, The adjustment operation unit includes: A cord is provided between the longitudinal end of the weight bar and the widthwise end of the lower end of the screen; an operating member that is provided so as to be operable to wind and unwind the cord, The tension is applied by stretching the cord through the operation of the adjustment operation unit. Roller blind.

7. The roller blind according to claim 2, The tension applying means has magnets or magnetic bodies provided at the longitudinal ends of the weight bars and at the widthwise ends of the lower end of the screen, and applies the tension by the magnetic force of the magnets or magnetic bodies. Roller blind.

8. A roller screen according to any one of claims 2 to 7, Further comprising a cap attached to an end of the weight bar, The tensioning means is at least partially provided within the cap. Roller blind.

9. The roller blind according to claim 2, The tension applying means has a weight member provided at the width direction end of the lower end of the screen so as to be able to be housed within the weight bar, and applies the tension by the load of the weight member. Roller blind.

10. A roller blind according to any one of claims 2 to 6, The screen further includes a plate piece attached to a width direction end portion of the lower end of the screen, The tension applying means is connected at one end to the plate piece. Roller blind.

11. The roller blind according to claim 1, a long plate fixed to a lower end of the screen to connect the screen to the weight bar; The tension applying means applies the tension at least outward in the width direction of the screen. Roller blind.

12. The roller blind according to claim 1, The tension applying means is a connecting auxiliary member attached to a lower end of the screen, the connecting auxiliary member having a long length and an arch shape, and capable of elastic deformation; A groove portion is formed in the weight bar along the longitudinal direction, The auxiliary connection member is inserted into the groove with the arch-shaped protrusion facing downward, and elastically deforms in a substantially linear shape to apply the tension. Roller blind.

13. The roller blind according to claim 1, The tension applying means is The weight bar is elastically deformable into an arch shape; and an attachment mechanism capable of attaching the weight bar to the lower end of the screen in a state in which the weight bar is elastically deformed, The tension is applied by the restoring force of the elastically deformed weight bar. Roller blind.

14. The roller blind according to claim 1, The tension applying means is A biasing member provided in the internal space of the weight bar; a connecting member connecting the biasing member to both ends of the lower end of the screen in the width direction, The tension is applied by the biasing force of the biasing member. Roller blind.

15. The roller blind according to claim 1, The tension applying means is The weight bar has a main body and a sliding portion that is slidable in a longitudinal direction relative to the main body; A biasing member that biases the sliding portion outward in the longitudinal direction; A retaining member provided at both ends of the lower end of the screen in the width direction; a locking portion provided on the sliding portion and capable of locking the retaining member, The sliding portion is slid inward in the longitudinal direction against the biasing force of the biasing member, and the retaining member is engaged with the engaging portion to release the sliding, thereby applying the tension by the biasing force. Roller blind.

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