Roller blinds

Abstract

To provide a roll screen that can be loaded evenly over the entire width direction of the screen.SOLUTION: A roll screen Sr includes a screen Sc and a weight bar 10. The roll screen Sr is configured such that one end portion of the screen Sc is connected to a rotatable winding pipe Pr so as to be freely wound and unwound, and the other end portion of the screen Sc hangs down from the winding pipe Pr, is folded back by the weight bar 10, and is connected to a fixing member Mf provided in the vicinity of the winding pipe Pr. The weight bar 10 includes a rotary pipe 11 disposed at a folded portion of the screen Sc, and a side cap 21 rotatably supporting the rotary pipe 11. The weight bar 10 has a weight 31 for adding a weight to the rotary pipe 11 disposed inside the rotary pipe 11.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a roll screen, and more particularly to a roll screen structure in which a screen hanging down from a winding pipe is folded back by a weight bar and connected to a set frame. [Background technology]

[0002] A roll screen has been disclosed in which one end of a screen, in which transparent and non-transparent sections are arranged alternately, is fixed to a rotatable winding pipe whose both ends are supported by a set frame placed above, the screen hanging down from the winding pipe is folded back with a weight bar, and the other end of the screen is connected to the set frame, and the folded back screen is stretched around the weight bar (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2014-173317 A Summary of the Invention [Problem to be solved by the invention]

[0004] The roll screen according to Patent Document 1 has one end of the screen connected to a rotatable winding pipe so that it can be wound and unwound, and the other end of the screen hangs down from the winding pipe, is folded back by a weight bar, and is connected to a fixed member provided near the winding pipe.

[0005] The weight bar according to Patent Document 1 includes a rotating pipe, a pair of pipe caps, a C-channel-shaped weight bar body, a pair of side caps, and a band-shaped adjustment weight.

[0006] The rotating pipe is disposed at the folded-back portion of the screen. A pair of pipe caps are engaged with both ends of the rotating pipe. The weight body is disposed below the rotating pipe. A pair of side caps are fixed to both ends of the weight body. The pair of side caps also support the pipe caps.

[0007] The adjustment weight is disposed inside the weight bar body, and the position of the adjustment weight can be adjusted from the bottom surface of the weight bar body so as to be movable along the longitudinal direction of the weight bar body.

[0008] The roll screen according to Patent Document 1 has an adjustment weight that is adjustable inside the weight bar body, so that if the screen becomes uncoiled when it is raised or lowered, the uncoil can be prevented by shifting the position of the adjustment weight along the length of the weight bar body.

[0009] In addition, the roll screen according to Patent Document 1 claims that the adjustment weight contributes to increasing the weight of the entire weight bar, thereby preventing the front and rear screen surfaces from bulging due to load being placed on the folded parts of the screen.

[0010] However, in the roll screen of Patent Document 1, the adjustment weight is provided inside the weight bar body, so the rotating pipe around which the folded-back portion of the screen is wound receives the load from the side caps fixed to the ends of the weight bar body at the pipe cap. As a result, the load is not evenly applied to the center of the rotating pipe in the longitudinal direction, and the load is applied from the rotating pipe to both ends of the screen, which creates the problem that it is difficult to keep the screen flat over its entire width.

[0011] There is a demand for a roll screen that can apply a load evenly to the folded-back portion of the screen over the entire width of the screen.

[0012] The present invention has been made in consideration of such problems, and has an object to provide a roll screen that allows a load to be applied evenly to the folded-back portion of the screen over the entire width direction of the screen. [Means for solving the problem]

[0013] The inventors thought that by forming a weight bar out of a rotating pipe placed at the folded-back part of the screen and side caps that rotatably support the rotating pipe, and by placing a weight inside the rotating pipe to add weight to the rotating pipe, it would be possible to apply a load evenly across the entire width of the screen, and this led to the invention of a new roll screen as described below.

[0014] (1) A roll screen according to the present invention is a roll screen in which one end of the screen is connected to a rotatable winding pipe so that it can be wound and unwound, and the other end of the screen hangs down from the winding pipe, is folded back by a weight bar, and is connected to a fixed member provided near the winding pipe, and the weight bar has a rotating pipe arranged at the folded back portion of the screen and a side cap that rotatably supports the rotating pipe, and a weight that adds weight to the rotating pipe is arranged inside the rotating pipe. The weight is positioned in the axial direction of the rotary pipe by a pipe cap attached to the end of the rotary pipe. is.

[0016] ( 2 ) The weight is preferably composed of a weight body and a covering member that houses the weight body inside.

[0017] ( 3 It is preferable that the covering member has a length covering substantially the entire length of the rotary pipe, and both ends of the covering member are positioned by the pipe caps.

[0018] ( 4 The weight body may be formed so as to have an overall length shorter than that of the covering member.

[0019] ( 5 It is preferable that the covering member forms a restricting portion that restricts movement of the weight body housed in the covering member. Effect of the Invention

[0020] The roll screen of the present invention has a weight placed inside the rotating pipe, so that the load of the rotating pipe is applied to the folded portion of the screen over the entire width of the screen, keeping the front and rear screen surfaces flat. [Brief description of the drawings]

[0021] [Figure 1] 1 is a front view showing the overall configuration of a roller blind according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a vertical cross-sectional view showing the configuration of a weight bar provided in the roller screen according to the first embodiment, and is a cross-sectional view taken along the line AA in FIG. [Diagram 3] FIG. 3(A) is a longitudinal cross-sectional view of the central portion of a weight bar according to the prior art in which no weight is placed inside the rotating pipe, and FIG. 3(B) is a longitudinal cross-sectional view of the central portion of a weight bar according to the first embodiment in which a weight is placed inside the rotating pipe. [Figure 4] FIG. 4(A) is a front view of a weight bar according to the prior art in which an adjustment weight is arranged inside the weight bar body located below the rotating pipe, and FIG. 4(B) is a front view of the weight bar according to the first embodiment in which a weight is arranged inside the rotating pipe. [Diagram 5] FIG. 2 is a partial vertical cross-sectional view showing the configuration of a weight bar provided in the roller screen according to the first embodiment. [Figure 6] FIG. 2 is an enlarged cross-sectional view of a main portion showing the configuration of a weight bar provided in the roller screen according to the first embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along the line BB in FIG. 6. [Figure 8]FIG. 7 is a cross-sectional view taken along the line CC of FIG. 6. [Figure 9] FIG. 2 is an exploded perspective view showing the configuration of a rotating pipe provided in the roller screen according to the first embodiment. [Figure 10] FIG. 2 is a partially enlarged perspective view showing the configuration of a weight bar provided in the roller screen according to the first embodiment. [Figure 11] FIG. 11 is a right side cross-sectional view showing the configuration of a weight bar provided on a roller blind according to the first embodiment, in which FIG. 11(A) shows the light blocking state when the weight bar is positioned at the lowest end, and FIG. 11(B) shows the light receiving state when the screen is rolled up from the state shown in FIG. 11(A). [Figure 12] These are longitudinal cross-sectional views showing modified examples of weights provided on a roller screen according to the first embodiment, where Figure 12(A) is a state diagram in which a short weight body is accommodated in the center of the covering member, Figure 12(B) is a state diagram in which two short weight bodies are accommodated inside the covering member, Figure 12(C) is a state diagram in which three short weight bodies are accommodated inside the covering member, and Figure 12(D) is a state diagram in which a short weight body is accommodated in the center of the covering member and the short weight bodies arranged at both ends of the covering member are supported by pipe caps. [Figure 13] FIG. 11 is a partial vertical sectional view showing the configuration of a weight bar provided in a roller screen according to a second embodiment of the present invention. [Figure 14] FIG. 11 is a partial cross-sectional view showing the configuration of a weight provided on a roller screen according to a third embodiment of the present invention. [Figure 15] FIG. 15(A) is a front view of a roll screen according to the prior art in which irregular winding has occurred, and FIG. 15(B) is a front view of a roll screen according to the third embodiment in which weights are positioned unevenly inside the rotating pipe. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] [First embodiment] (Structure of Roller Blinds) (Overall composition) First, the overall configuration of a roller blind according to a first embodiment of the present invention will be described. Referring to Fig. 1, the roller blind Sr according to the first embodiment is installed inside a rectangular opening such as a window frame of a building. The roller blind Sr is installed inside a room separated from the outside of the building by window glass (not shown) or the like.

[0024] Referring to Fig. 1, the roller blind 1Sr comprises a channel-shaped set frame Fs, a sheet-shaped screen Sc, and a weight bar 10. The set frame Fs is fixed to the upper surface of an opening such as a window frame using a pair of brackets Br·Br.

[0025] 1, the set frame Fs has a pair of side plates Ps·Ps fixed to both ends thereof. The pair of side plates Ps·Ps rotatably support the winding pipe Pr.

[0026] 2, one end of the screen Sc is connected to the winding pipe Pr. The other end of the screen Sc hangs down from the winding pipe Pr, is folded back by a weight bar 10, and is connected to a fixed member Mf provided near the winding pipe Pr. More specifically, a fixed plate Pd is connected to the other end of the screen Sc. The fixed plate Pd is housed inside the fixed member Mf that constitutes a part of the set frame Fs, and thereby the other end of the screen Sc is fixed to the fixed member Mf.

[0027] Referring to Fig. 1, the winding pipe Pr is provided with an operation unit Uc on one end side. A pulley (not shown) is disposed inside the operation unit Uc. The winding pipe Pr has the pulley coaxially fixed to one end side. A ball chain Cb, which serves as an operation chain, is wound around the pulley. The looped ball chain Cb hangs down from the pulley.

[0028] 1 and 2, the winding pipe Pr can wind up the screen Sc by pulling downward the ball chain Cb arranged on the front side (indoor Ri side). On the other hand, the winding pipe Pr can unwind the screen Sc by pulling downward the ball chain Cb arranged on the rear side (outdoor Ro side). If the operation of the ball chain Cb is stopped, the winding pipe Pr can maintain its stopped position.

[0029] 2, the screen Sc hanging down from the winding pipe Pr is located on the front side (indoor Ri side) of the weight bar 10, and the screen Sc folded back by the weight bar 10 is located on the rear side (outdoor Ro side) of the weight bar 10. The screen Sc unwound from the winding pipe Pr is arranged in a double state in the front-to-rear direction. The screen Sc maintains a stretched state by having the folded back portion pulled downward by the weight of the weight bar 10.

[0030] 1 or 11, the screen Sc is formed with a constant period of alternating transparent parts La that transmit a certain amount of light and non-transparent parts Lb that have a lower light transmittance than the transparent parts La. The transparent parts La are preferably made of a transparent or semi-transparent material, and the non-transparent parts Lb are preferably made of a light-shielding material.

[0031] (Weight bar configuration) Next, the configuration of the weight bar 10 according to the first embodiment will be described. Referring to Fig. 2 or Fig. 5 to Fig. 10, the weight bar 10 comprises a C-channel-shaped weight bar main body 1b, a rotating pipe 11 having a cavity therein, and a pair of side caps 21·21.

[0032] 5 or 10, a pair of side caps 21 are fitted to both ends of the weight bar main body 1b. The pair of side caps 21 can be detachably fixed to both ends of the weight bar main body 1b using male screw members Sm (see FIG. 6).

[0033] 2, the rotating pipe 11 is supported on the folded-back portion of the screen Sc. By operating the ball chain Cb to wind or unwind the screen Sc onto or from the winding pipe Pr, the rotating pipe 11 can be rotated relative to the weight bar main body 1b and the pair of side caps 21·21.

[0034] 5 or 6 and 9 or 10, the rotating pipe 11 has a hollow pipe body 11p and a pair of pipe caps 11c / 11c. A pair of pipe caps 11c / 11c are fitted to both ends of the pipe body 11p. The outer circumferential surface of the rotating pipe 11 has a plurality of grooves formed at equal intervals in the circumferential direction and extending along the longitudinal direction (see FIG. 9 or 10). This makes it possible to prevent slippage between the screen Sc and the rotating pipe 11.

[0035] 7 to 10, the pipe cap 11c has a cylindrical portion 111 and a tubular fitting portion 112 whose outer and inner peripheral surfaces are polygonal. The fitting portion 112 is inserted from the end of the pipe body 11p and fits into the pipe body 11p (see FIG. 9). The pipe cap 11c closes the end of the pipe body 11p. Referring to FIG. 6 or 9, the cylindrical portion 111 has a circular outer peripheral surface with approximately the same diameter as the pipe body 11p.

[0036] 6 or 10, the side cap 21 has an oval cap case 21c, a base 21b, and a bearing portion 21s. The base 21b fits into the cap case 21c while closing the opening of the cap case 21c.

[0037] 6 and 10, the bearing portion 21s is disposed on the inner surface side of the base 21b. The bearing portion 21s is attached to the cap case 21c by fitting the base 21b into the cap case 21c. A part of the bearing portion 21s is inserted into a circular hole opening in the base 21b. The bearing portion 21s rotatably supports the cylindrical portion 111 of the rotating pipe 11 (see FIG. 10).

[0038] (Structure of weight) 2 or 5 to 10, the weight bar 10 has a weight 31 disposed inside the rotating pipe 11. The weight 31 can add weight to the rotating pipe 11. Referring to FIG. 6 or 7 and 10, the weight bar 10 is composed of a cylindrical weight body 31b and a covering member 31c made of synthetic resin. The weight body 31b is preferably made of steel or the like. The covering member 31c houses the weight body 31b inside.

[0039] 6 or 9, in the weight 31, the weight body 31b protrudes from the end face of the covering member 31c. In other words, the length of the covering member 31c is shorter than the length of the weight body 31b. The end of the weight body 31b is held by a pipe cap 11c attached to the end of the rotating pipe 11 (see FIG. 6).

[0040] 6, the end of weight main body 31b is inserted into fitting portion 112. Referring to Fig. 8, fitting portion 112 has multiple protrusions (holding portions) 311 protruding from the inner circumferential surface toward the center. By inserting the end of weight main body 31b into fitting portion 112 from which multiple protrusions (holding portions) 311 protrude, axial movement and rotation of weight 31 relative to rotation of rotating pipe 11 can be suppressed.

[0041] 5 or 6, the covering member 31c has a length that covers almost the entire length of the rotating pipe 11. Both ends of the weight body 31b are positioned by the pipe cap 11c. More specifically, the length of the covering member 31c is approximately the entire length of the rotating pipe 11 minus two lengths of the fitting portion 112 of the pipe cap 11c. The weight body 31b protrudes from both ends of the covering member 31c, and the weight body 31b is inserted until the covering member 31c abuts against the fitting portion 112 of the pipe cap 11c. If contact between the weight body 31b and the inner surface of the rotating pipe 11 can be avoided, the length of the covering member 31c may be short so that a part of the weight body 31b is exposed from both ends of the covering member 31c in the rotating pipe 11, rather than the length at which both ends abut against the fitting portion 112 of the pipe cap 11c.

[0042] Referring to Figures 1, 2 and 5 to 10, the roll screen Sr according to the embodiment has a weight 31 arranged inside the rotating pipe 11, so that the weight of the rotating pipe 11 is applied to the folded portion of the screen Sc over the entire width of the screen Sc, and the front and rear screen surfaces can be kept flat.

[0043] Next, the operation of the roller blind Sr according to the first embodiment will be described. With reference to Fig. 1 or 2, when the ball chain Cb is operated to rotate the winding pipe Pr and the length of the screen Sc hanging down from the winding pipe Pr is changed, as shown in Fig. 11(A), when the transparent portion La of one of the front and rear screens Sc overlaps with the non-transparent portion Lb of the other screen Sc, the screen Sc enters a shielding state.

[0044] On the other hand, when the weight bar 10 is positioned at the lowest end as shown in FIG. 11(A), the ball chain Cb is operated to rotate the winding pipe Pr, and the winding pipe Pr winds up the screen Sc. When the transparent portion La of one of the front and rear screens Sc overlaps with the transparent portion La of the other screen Sc, the screen Sc enters a light-collecting state as shown in FIG. 11(B).

[0045] In this way, referring to Fig. 11, the dimming state can be changed by changing the degree of overlap between the transmissive parts La. In the state shown in Fig. 11(B), the weight bar 10 is raised by about 35 mm from the state shown in Fig. 11(A).

[0046] (Roller screen action) Next, the action and effect of the roll screen Sr according to the first embodiment will be described. With reference to Fig. 3(A), in the weight bar according to the conventional technology in which no weight is arranged inside the rotating pipe 11, when a screen Sc with high tension is used, since the load is not directly applied to the center of the rotating pipe 11, there was a concern that the screen Sc would swell in the front-back direction. This raised concerns that the screen Sc would come into contact with the end of the weight bar main body 1b. In addition, when the screen Sc is formed with the transparent portion La and the non-transparent portion Lb alternately formed continuously in the up-down direction at a constant period, the transparent portion La and the non-transparent portion Lb have different tensions, so there was a concern that when the light control operation is performed, the rotating pipe 11 would swing back and forth while rotating in accordance with the movement of the screen Sc.

[0047] 3(B), the weight bar 10 according to the first embodiment in which the weight 31 is disposed inside the rotating pipe 11 applies a load directly to the entire length of the rotating pipe 11, so that the front and rear surfaces of the screen Sc can be kept flat even if the screen Sc is highly elastic. Furthermore, even if the screen Sc has transmissive portions La and non-transmissive portions Lb that are alternately formed continuously in the vertical direction at a constant cycle, the front and rear surfaces of the screen Sc can be kept flat, so that the rotating pipe 11 can rotate smoothly in accordance with the movement of the screen Sc during the dimming operation.

[0048] Furthermore, referring to FIG. 4(A), in a weight bar according to the prior art in which an adjustment weight 31d is arranged inside the weight bar main body 1b arranged below the rotating pipe 11d, a load is applied to both ends of the rotating pipe 11d, causing both ends of the rotating pipe 11d to bend downward, raising the concern that tension would be applied only to both ends in the width direction of the screen Sc.

[0049] On the other hand, referring to FIG. 4(B), the weight bar 10 according to the first embodiment in which the weight 31 is disposed inside the rotary pipe 11 can apply a load evenly over the entire width of the screen Sc.

[0050] Referring to Figures 1, 2 and 5 to 10, the roll screen Sr according to the embodiment has a weight 31 arranged inside the rotating pipe 11, so that the weight of the rotating pipe 11 is applied to the folded portion of the screen Sc over the entire width of the screen Sc, and the front and rear screen surfaces can be kept flat.

[0051] Also, referring to Figures 5 to 10, the roll screen Sr according to the first embodiment houses the weight body 31b inside the covering member 31c, so that even if the weight 31 moves inside the rotating pipe 11 or the central part of the rotating pipe 11 moves in a rotating manner when the rotating pipe 11 rotates, the covering member 31c acts as a cushioning material to suppress the generation of contact noise with the inner wall of the rotating pipe 11.

[0052] 5 to 10, in the roll screen Sr according to the first embodiment, both ends of the weight 31 are held by the pipe caps 11c, so that movement inside the rotating pipe 11 that rotates when the screen Sc is raised and lowered can be restricted. Also, damage to the rotating pipe 11 (particularly the pipe caps 11c) or the side caps 21 (particularly the cap cases 21c) can be prevented when the roll screen Sr is transported.

[0053] Also, referring to Figures 5 to 10, in the roll screen Sr according to the first embodiment, the covering member 31c has a length covering almost the entire length of the rotating pipe 11, and both ends of the covering member 31c are positioned by pipe caps 11c, thereby preventing the weight body 31b from moving inside the rotating pipe 11.

[0054] (Variations of weights) Next, modified examples of the weight placed inside the rotating pipe 11 will be described. Referring to Fig. 12(A), the weight 32 according to the first modified example has a short weight body 32b housed in the center of a covering member 32c. The covering member 32c is provided with a restricting portion 321 to prevent the weight body 32b from moving in the axial direction. Specifically, the restricting portion 321 is formed by drawing with heat so as to protrude in a ring-like shape inside the covering member 32c.

[0055] 12(B), weight 33 according to the second modification contains two short weight bodies 32b inside covering member 33c. Covering member 33c is provided with restricting portion 331 to prevent weight body 32b from moving in the axial direction. Weight body 32b is preferably disposed at equal positions on the left and right sides with respect to the center position in the axial direction of covering member 33c.

[0056] 12(C), weight 34 according to the third modified example contains three short weight bodies 32b inside covering member 34c. Covering member 34c is provided with restricting portion 341 to prevent weight body 32b from moving in the axial direction. It is preferable that one weight body 32b is located at the center of covering member 34c in the axial direction, and the remaining two are located at equal positions on the left and right of weight body 32b located at the center.

[0057] 12(D), in the weight 35 according to the fourth modification, the short weight body 32b is accommodated in the center of the covering member 35c, and the short weight body 32b arranged at both ends of the covering member 35c is supported by the pipe cap 11c. The covering member 35c is provided with a restricting portion 351 to prevent the weight body 32b from moving in the axial direction.

[0058] 12(A) to 12(D), the weight body may be formed to be shorter than the covering member, and when the weight added to the rotating pipe 11 may be small, a short weight body may be used, and by inserting the weight body into the rotating pipe while the weight body is housed in the center of the covering member, the weight body can be disposed near the center of the rotating pipe 11. The short weight body may be disposed offset relative to the covering member, in which case irregular winding of the screen Sc can be suppressed.

[0059] 12(A) to 12(D), it is preferable that the covering member has a restricting portion for restricting the movement of the weight body housed in the covering member. This restricts the movement of the weight body housed in the covering member, and when multiple weight bodies are provided, the weight bodies can be placed in the locations where the load is required without being displaced.

[0060] [Second embodiment] Next, the configuration of the roller screen according to the second embodiment will be described. Referring to FIG. 13, the weight bar 20 according to the second embodiment has substantially the same configuration as the weight bar 10 according to the first embodiment, but differs in that the weight bar 10 according to the first embodiment accommodates a long weight 31 inside the rotating pipe 11, whereas the weight bar 20 according to the second embodiment accommodates one or more short weights inside the rotating pipe 11. The covering member 32c has a length that covers substantially the entire length of the rotating pipe 11, and both ends of the covering member 32c are positioned by pipe caps 11c. The covering member 32c is provided with a restricting portion 321 so that the weight body 32b does not move in the axial direction. This makes it possible to prevent the weight body 32b from moving inside the rotating pipe 11.

[0061] [Third embodiment] Next, the configuration of the roller blind according to the third embodiment will be described. Referring to Fig. 14, the weight bar 30 according to the third embodiment differs from the second embodiment in that a short weight body 32b is housed inside the rotating pipe 11 at a position offset from the center. In the third embodiment, the short weight body 32b of the weight 36 is disposed at a position offset to one side (the left side in FIG. 14) from the center of a covering member 36c having a length covering substantially the entire length of the rotating pipe 11. The covering member 36c is provided with a restricting portion 361 to prevent the weight body 32b from moving in the axial direction.

[0062] The third embodiment in which the short weight body 32b is disposed at a position offset from the center can be used when winding irregularities occur in the screen Sc.

[0063] As shown in Fig. 15(A), when the screen Sc of the roll screen is wound up, the screen Sc may be wound up while shifting in the axial direction of the winding pipe Pr, resulting in "winding irregularity." In the example shown in Fig. 15(A), the screen Sc moves to the left as it is wound up, resulting in winding irregularity. In such a case, conventionally, an adjustment tape (not shown) is applied to the outer circumferential surface of the winding pipe Pr to adjust the winding diameter, thereby preventing the occurrence of irregular winding.

[0064] On the other hand, in the roller blind according to the third embodiment, as shown in FIG. 15(B), the weight body 32b is positioned biased toward the side along which the rolled-up screen Sc moves (the left side in FIG. 15(A)), thereby shifting the position of the center of gravity, thereby eliminating irregular winding.

[0065] In the roll screen of the present invention, a weight 31 is placed inside the rotating pipe 11, so that the weight of the rotating pipe 11 is applied to the folded portion of the screen Sc over the entire width of the screen Sc, and the front and rear screen surfaces can be kept flat. [Explanation of symbols]

[0066] 10,20,30 Weight Bar 11 Rotating Pipe 21 Side Cap 31,32,33,34,35,36 weight Pr Winding pipe Mf Fixing member Sc Screen Sr Roll Screen

Claims

1. A roll screen in which one end of the screen is connected to a rotatable winding pipe so as to be capable of being wound and unwound, and the other end of the screen hangs down from the winding pipe, is folded back by a weight bar, and is connected to a fixed member provided in the vicinity of the winding pipe, The weight bar includes: A rotary pipe disposed at a folded portion of the screen; a side cap that rotatably supports the rotary pipe; a weight for adding weight to the rotary pipe is disposed inside the rotary pipe; The weight is positioned in the axial direction of the rotary pipe by a pipe cap attached to the end of the rotary pipe.

2. 2. The roller screen according to claim 1, wherein the weight comprises a weight body and a covering member that houses the weight body therein.

3. 3. The roller screen according to claim 2, wherein the covering member has a length covering substantially the entire length of the rotary pipe, and both ends of the covering member are positioned by the pipe caps.

4. 4. The roller screen according to claim 2, wherein the weight body is formed to have a total length shorter than that of the covering member.

5. 5. The roller blind according to claim 2, wherein the covering member forms a restricting portion that restricts movement of the weight body housed in the covering member.

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