Screens for blinds, blinds, and methods for manufacturing screens for blinds.

Abstract

To provide a blind screen, a blind, and a method for manufacturing a blind screen which are capable of improving workability when inserting an attaching member for attaching a bar member to the screen into a bag-like part formed at the lower end of the screen.SOLUTION: A blind screen 120 is formed at one end thereof with a bag-shaped section 121 into which an elongated shaft 130 for attaching a weight bar 140 can be inserted. The bag-shaped section is formed by being folded back and sewn at a folding position near one end, and the bag-shaped section is provided with one or more-fold sections (122, 123-1, 123- 2) formed along the insertion direction of the shaft, and is configured so as to be deformable into a bag shape when the fold sections are folded. Therefore, it is possible to improve the workability when inserting an attachment member for attaching a bar member to the screen into the bag-shaped section formed at the lower end of the screen.SELECTED DRAWING: Figure 1

Description

Technical Field

[0005] , , ,

[0001] The present invention relates to a screen for a blind, a blind, and a method for manufacturing a screen for a blind.

Background Art

[0002] As a conventional blind, there is one disclosed in Japanese Utility Model Laid-Open No. 7-32189 (Patent Document 1). In this document, as a bar material provided on a roll screen, it is formed in a cylindrical shape extending in one direction, having slits opened vertically along the extending direction, a partition plate partitioning the inside vertically, and an extension portion formed by folding back the side edge portions of the slits inward, and a weight bar is disclosed in which an internal chamber that does not open to the outer periphery is formed by the extension portion.

[0003] This type of weight bar forms a retaining member at the lower end of the screen by inserting a rod-shaped mounting member (mandrel) into a bag-shaped portion formed by folding back and sewing the lower end of the screen, and is connected to the screen by housing the retaining member in the internal chamber.

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 conventional blinds such as those disclosed in Patent Document 1, the bag-shaped portion is formed by sewing the lower end of the screen in a folded state, so after sewing, the bag-shaped portion is closed without any gaps. Furthermore, it is not easy to deform the bag-shaped portion to inflate it before inserting the mounting member. As a result, there is a problem that the frictional resistance when inserting the mounting member into the bag-shaped portion becomes large, or the insertion end of the mounting member gets caught on the inner surface of the bag-shaped portion, making it difficult to insert the mounting member into the bag-shaped portion.

[0006] Therefore, the present invention has been made in view of these problems, and aims to provide a screen for blinds, a blind, and a method for manufacturing a screen for blinds that can improve the workability when inserting an attachment member for attaching a bar material to the screen into a bag-shaped portion formed at the lower end of the screen. [Means for solving the problem]

[0007] To solve the above problems, according to a first aspect of the present invention, there is a screen for a blind in which a bag-shaped portion is formed at one end into which a long mounting member (shaft) for attaching a bar material (weight bar) can be inserted, wherein the bag-shaped portion is formed by folding and joining at a folding position near the end, and the bag-shaped portion has one or more folds formed along the insertion direction of the mounting member, and the folds can be bent to deform into a bag shape.

[0008] With this configuration, the closed bag-like portion can be deformed to expand by folding the fold, making it easier to insert the mounting member into the bag-like portion and improving work efficiency. Furthermore, since it is not necessary to make the bag-like portion larger to facilitate the insertion of the mounting member, it is also advantageous in terms of design.

[0009] The present invention has various applications. For example, at least one of the front and back surfaces of the screen may be covered with a covering material (a back coating agent made of acrylic resin, polyurethane resin, etc.). With such a configuration, even if the screen is covered with a covering material that increases frictional resistance when inserting the mounting member into the bag-shaped part, or if the rigidity of the fabric is increased by the covering material and it is difficult to inflate into a bag shape, the bag-shaped part can be easily inflated by forming a fold, so that the mounting member can be easily inserted into the bag-shaped part.

[0010] Furthermore, the fold may be a first fold (main line) formed at the folding position. With this configuration, the bag-like portion can be inflated by the rigidity of the screen by folding the first fold and folding back the lower end of the screen.

[0011] Furthermore, the fold portion may be a second fold portion (sub-line) formed on at least one side of the first fold portion, on either the one side or the other side. With this configuration, the first fold portion can be folded to fold back the lower end of the screen, and the second fold portion can be folded to inflate the bag-like portion.

[0012] Furthermore, the fold portion may be formed by peeling off a part of the covering material in a cut-like manner. With this configuration, even if the screen is covered with a covering material that increases frictional resistance when inserting the mounting member into the bag-like portion, or if the rigidity of the fabric is increased by the covering material and it is difficult to expand into a bag-like shape, the fold portion can be formed by the simple operation of peeling off a part of the covering material in a cut-like manner, and the mounting member can be easily inserted into the bag-like portion.

[0013] Furthermore, the fold portion may be formed on the surface that becomes the outer surface of the bag-shaped portion when it is formed. With this configuration, since the fold portion is located on the outside of the bag-shaped portion, the screen is more easily deformed outward along the cut of the fold portion, and the bag-shaped portion can be easily inflated while visually confirming the position of the fold.

[0014] Furthermore, the fold portion may consist of a first fold portion (main line) formed at the folding position and one or more second fold portions (sub-lines) formed on at least one side of the first fold portion, or the other side. With this configuration, the lower end of the screen can be folded back by bending the first fold portion, and the bag-like portion can be inflated by bending the second fold portion.

[0015] Furthermore, the second fold portion may be formed in pairs or more on one side and the other side that straddle the first fold portion, such that the distance to the first fold portion is approximately equal. With this configuration, the bag-like portion can be inflated in a symmetrical shape across the fold position.

[0016] Furthermore, one or more folds may be formed on at least one side of the folding point, on either the side that straddles the folding point or the other side. With this configuration, the folds can be folded to inflate the bag-like portion.

[0017] Furthermore, the folds may be formed in pairs or more on one side and the other side of the fold, such that the distance to the fold is approximately equal. With this configuration, the bag-like portion can be inflated in a symmetrical shape across the fold.

[0018] Furthermore, the folds may be avoided at least near the insertion opening of the mounting member. With this configuration, the folds can be used to expand the bag-like portion near the center of the screen, where it is difficult for the bag-like portion to expand, making it easier to insert the mounting member.

[0019] Also, the fold line portion may be formed in a dashed line shape. According to such a configuration, even if the fold line portion accidentally penetrates the screen, it is possible to prevent the entire screen from being cut.

[0020] Also, the fold line portion may be constituted by a pressed mark. According to such a configuration, damage to the screen due to the processing of the fold line portion can be reduced, and the fold line portion does not penetrate the screen.

[0021] Also, the fold line portion may be constituted by a cut. According to such a configuration, The fold line portion can be formed by a simple operation of making a cut in a part of the screen.

[0022] Also, according to a second aspect of the present invention, there is provided a blind characterized by comprising the screen, the mounting member, and the bar material.

[0023] According to such a configuration, it is possible to obtain a blind (such as a roller screen, a pleated screen, etc.) that can improve the workability when inserting a mounting member for attaching a bar material to the screen into a bag-shaped portion formed at the lower end of the screen.

[0024] Also, according to a third aspect of the present invention, there is provided a method for manufacturing a screen for a blind in which a bag-shaped portion into which a long mounting member (shaft) for attaching a bar material (weight bar) can be inserted is formed at one end. The method includes forming, by processing means (cutter), one or more fold line portions along the insertion direction of the mounting member in the vicinity of one end, folding back one end and sewing, and forming a bag-shaped portion that can be deformed into a bag shape by bending the one or more fold line portions in the sewn state.

[0025] According to such a configuration, it is possible to manufacture a screen that can improve the workability when inserting a mounting member for attaching a bar material to the screen into a bag-shaped portion formed at the lower end of the screen.

Advantages of the Invention

[0026] According to the present invention, it is possible to provide a screen for a blind, a blind, and a method for manufacturing a screen for a blind that can improve the workability when inserting a mounting member for attaching a bar member to a screen into a bag-shaped portion formed at the lower end of the screen. Other effects of the present invention will also be described in the mode for carrying out the invention described later.

Brief Description of the Drawings

[0027] [Figure 1] It is a side sectional view of a roll screen 100 of the first embodiment. [Figure 2] It is a front view of the screen 120. [Figure 3] It is a view showing a state where the screen 120 is being processed at the fold portion. [Figure 4] It is a view for explaining the process of processing the fold portion of the screen 120. (a) shows the state before processing, (b) shows the state during processing, and (c) shows the state after processing. [Figure 5] It is a view showing the procedure for forming a bag-shaped portion 121 at the lower end of the screen 120. (a) shows the state before sewing SW at the lower end of the screen 120, (b) shows the state where the lower end of the screen 120 is folded back at the first fold portion 122 (main line), (c) shows the state where the folded end is sewn SW to form the bag-shaped portion 121, (d) shows the state where the bag-shaped portion 121 is inflated using the second fold portions 123-1 and 123-2 (sub lines), and (e) shows the state where the shaft 130 is inserted into the bag-shaped portion 121. [Figure 6] It is a perspective view showing the procedure for inserting the shaft 130 into the lower end of the screen 120. (a) shows the state before inserting the shaft 130 into the inflated bag-shaped portion 121, and (b) shows the state where the shaft 130 is being inserted into the bag-shaped portion 121. [Figure 7] It is a front view showing the state where the shaft 130 is inserted into the lower end of the screen 120. [Figure 8] This diagram illustrates the state in which the lower end of the screen 120 is attached to the weight bar 140. (a) is a side cross-sectional view of the lower end of the screen 120 before it is attached to the weight bar 140, and (b) is a side cross-sectional view showing the state in which the lower end of the screen 120 is attached to the weight bar 140. [Figure 9] This figure illustrates the screen 220 of the roll screen 200 of the second embodiment, where (a) is a front view of the screen 220 and (b) is a diagram showing the screen 220 with folds applied. [Figure 10] This diagram illustrates the process of forming a bag-like portion in the screen 220. (a) is a cross-sectional view showing the formation of folds 222, 223-1, and 223-2, and (b) is a perspective view showing the formation of the bag-like portion 221. [Figure 11] This is a cross-sectional view of the screen 320 of the roll screen 300 according to the third embodiment. [Figure 12] This figure shows the screen 420 of the roll screen of the fourth embodiment with the fold portion processed. [Figure 13] This figure shows the screen 520 of the fifth embodiment of the roll screen with the fold portion processed. [Figure 14] These are side cross-sectional views showing modified versions of the screen 620: (a) is Modification 1, in which the screen 620 has a first fold portion 622 and one second fold portion 623-2; (b) is Modification 2, in which the screen 620 does not have a first fold portion 622 but has two second fold portions 623-1 and 623-2; and (c) is Modification 3, in which the screen 620 has a first fold portion 622 and four second fold portions 623-1 to 623-4. [Modes for carrying out the invention]

[0028] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. In this specification and drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant explanations will be omitted. In the embodiments described below, a roller screen will be used as an example, but the present invention can be applied to blinds such as pleated screens.

[0029] (First Embodiment) A first embodiment of the present invention will now be described. First, the configuration of the roll screen 100 will be described with reference to Figure 1. Figure 1 is a side cross-sectional view of the roll screen 100 of this embodiment. Note that the roll screen 100 of this embodiment can be used in a type in which the screen 120 moves up and down along a guide rail.

[0030] As shown in Figure 1, the roller screen 100 is constructed such that the upper end of the screen 120 can be rolled up and unrolled, and the winding pipe 114, which is fixed to a fixed surface such as a window frame by a bracket 110 and disposed within a set frame 112, is connected to the winding pipe 114. The lower end of the screen 120 is connected to a weight bar 140 (bar material) via a shaft 130 (mounting member). A front cover 116 is provided in front of the winding pipe 114. In addition, a gap prevention member 142 is provided protruding from the bottom of the weight bar 140 to close the gap with the lower frame of the window frame, etc.

[0031] Note that the components other than the screen 120, namely the bracket 110, set frame 112, winding pipe 114, front cover 116, shaft 130, weight bar 140, and gap prevention member 142, can be configured in the same way as a typical roll screen. Therefore, a detailed explanation will be omitted. The screen 120, which is a characteristic component of this embodiment, will be described below.

[0032] The configuration of the screen 120 will be explained with reference to Figure 2 in addition to Figure 1. Figure 2 is a front view of the screen 120. As shown in Figure 1, the screen 120 has a bag-like portion 121 at its lower end into which a long shaft 130 with a hexagonal cross-section for attaching the weight bar 140 can be inserted. Furthermore, as shown in Figure 3, the back surface of the screen 120 (i.e., the surface facing the outdoors) has a back-coated surface 120b formed by coating the base fabric 120a with a back-coating agent (coating material) made of acrylic resin, polyurethane resin, etc., to improve light-shielding properties.

[0033] As shown in Figure 2, three folds 122, 123-1, and 123-2 are formed on the backcoat surface 120b at the location where the bag-shaped portion 121 of the screen 120 is formed, parallel to the insertion direction of the shaft 130. The bag-shaped portion 121 can be deformed into a bag shape by folding along the three folds 122, 123-1, and 123-2. The first fold 122, formed in the center, is formed at the folding position of the screen 120. Therefore, the first fold 122 makes it easy to fold back the screen 120.

[0034] Second folds 123-1 and 123-2 are formed on one and the other side of the first fold 122, such that the distance to the first fold 122 is approximately the same. The second folds 123-1 and 123-2 are intended to facilitate the formation of the bulge in the bag-like portion 121. The first fold 122 and the second folds 123-1 and 123-2 are formed by dashed lines cut into a part of the screen 120.

[0035] The configuration of the screen 120 has been described above. Next, the process of processing the screen 120 to create three folds 122, 123-1, and 123-2 will be described with reference to Figures 3 and 4. Figure 3 shows the screen 120 in the process of processing the folds. Figure 4 is a diagram illustrating the process of processing the screen 120 to create the folds, where (a) shows the state before processing, (b) shows the state during processing, and (c) shows the state after processing.

[0036] The folding of the screen 120 is performed by a rotary cutter RC (processing means), as shown in Figure 3. The rotary cutter RC has cutter blades CB formed at regular intervals in the circumferential direction, and makes cuts in the back coat surface 120b. The rotary cutter RC is configured such that the length of the blades CB can be adjusted to make cuts in the back coat surface 120b but not in the base fabric 120a. The cuts are formed in a dashed line along the screen 120. When the rotary cutter RC is moved along the screen 120 as shown by arrow a in Figure 3, cuts are formed at regular intervals in the back coat surface 120b, forming three folding sections 122, 123-1, and 123-2.

[0037] As shown in Figure 4, the rotary cutter RC has three cutter blades CB arranged side by side with a gap between them. The spacing between the blades CB of each cutter is set to match the spacing between the three fold sections 122, 123-1, and 123-2. The configuration of the rotary cutter RC and the cuts have been explained above. The process for processing the three fold sections 122, 123-1, and 123-2 will be explained below.

[0038] The cutter blade CB of the rotary cutter RC is positioned to process the cuts in the screen 120, as shown in Figure 4(a). The cutter blade CB is pressed against the screen 120, as shown in Figure 4(b), and the rotary cutter RC is moved. During this process, the load of the rotary cutter RC continuously pulls along the screen 120. As a result, cuts are formed in the back coat surface 120b of the screen 120, creating three folds 122, 123-1, and 123-2, as shown in Figure 4(c).

[0039] The process of forming a bag-shaped portion 121 on a screen 120 that has been processed with three folds 122, 123-1, and 123-2 will be explained with reference to Figure 5. Figure 5 is a diagram showing the procedure for forming a bag-shaped portion 121 at the lower end of the screen 120.

[0040] When forming a bag-like portion 121 in the screen 120, first, three folds 122, 123-1, and 123-2 are formed in the screen 120 as shown in Figure 5(a). Next, as indicated by arrow b in Figure 5(b), the screen 120 is folded back along the first fold 122 so that the three folds 122, 123-1, and 123-2 become the surface (outer surface of the bag-like portion 121). Then, as shown in Figure 5(c), stitching SW is applied near the edge 124 of the screen 120. The edge 124 may be folded in three and stitched SW, or folded in half and stitched SW.

[0041] Then, as shown in Figure 5(d), when the second folds 123-1 and 123-2 are folded in the direction of separation as indicated by arrow c, the first fold 122 also rises as indicated by arrow d, causing the bag-shaped portion 121 to expand. The back coat surface 120b has high rigidity, but because the three folds 122, 123-1, and 123-2 are arranged on the surface (outer surface of the bag-shaped portion 121), it can be easily folded. As shown in Figure 5(e), the shaft 130 is inserted into the bag-shaped portion 121. Alternatively, the first fold 122 may be pushed from below as indicated by arrow d, which will spread the second folds 123-1 and 123-2 apart in the direction of separation as indicated by arrow c, causing the bag-shaped portion 121 to expand.

[0042] The procedure for inserting the shaft 130 into the bag-shaped portion 121 will be explained with reference to Figures 6 and 7. Figure 6 is a perspective view showing the procedure for inserting the shaft 130 into the lower end of the screen 120. Figure 7 is a front view showing the state in which the shaft 130 has been inserted into the lower end of the screen 120. When inserting the shaft 130 into the bag-shaped portion 121, the second fold portions 123-1 and 123-2 are folded in a direction that separates them from each other, as shown in Figure 6(a), to inflate the bag-shaped portion 121 beforehand. Then, the shaft 130 is inserted into the bag-shaped portion 121 from the opening at the end of the bag-shaped portion 121, as shown in Figures 6(b) and 7. As shown in Figure 6(b), the shaft 130 is inserted smoothly because the bag-shaped portion 121 is larger than the diameter of the shaft 130.

[0043] The state in which the lower end of the screen 120 is attached to the weight bar 140 will be explained with reference to Figure 8. Figure 8 is a diagram illustrating the state in which the lower end of the screen 120 is attached to the weight bar 140. When attaching the screen 120 to the weight bar 140, the shaft 130 is attached to the bag-shaped portion 121 of the screen 120, as shown in Figure 8(a). Then, as shown in Figure 8(b), the bag-shaped portion 121 with the shaft 130 attached is inserted into the mounting space 144 from the side end of the weight bar 140. The rest of the screen 120 is led out upward from the opening 146 at the top of the mounting space 144. The shaft 130 is prevented from coming out because its width is greater than the opening 146 of the mounting space 144.

[0044] (Effects of the first embodiment) As described above, according to this embodiment, even with a screen 120 whose rigidity is improved by the back coating agent (coating material), the closed bag-shaped portion 121 can be deformed to expand by bending the three folds 122, 123-1, and 123-2 formed on the back coating surface 120b. Therefore, it becomes easier to insert the shaft 130 into the bag-shaped portion 121, improving work efficiency. Furthermore, since it is not necessary to enlarge the bag-shaped portion 121 to facilitate the insertion of the shaft 130, it is also advantageous in terms of design.

[0045] Furthermore, by forming the first fold portion 122 and the second fold portions 123-1 and 123-2 formed on both sides straddling the first fold portion 122, the lower end of the screen 120 can be folded back by bending the first fold portion 122, and the bag-like portion 121 can be inflated by bending the second fold portions 123-1 and 123-2.

[0046] Furthermore, since the second folds 123-1 and 123-2 are formed in pairs on one side and the other side of the first fold 122 such that the distance to the first fold 122 is approximately the same, the bag-shaped portion 121 can be inflated in a symmetrical shape across the fold line.

[0047] Furthermore, since the three folds 122, 123-1, and 123-2 are formed in a dashed line pattern, even if a cut were to penetrate the screen 120, it would prevent the entire screen 120 from being cut.

[0048] Furthermore, the folds 122, 123-1, and 123-2 can be formed by simply making cuts in a portion of the back coat surface 120b.

[0049] (Second embodiment) The screen 220 of the second embodiment of the roll screen 200 will be described with reference to Figures 9 and 10. Figure 9 is a diagram illustrating the screen 220 of the roll screen 200 of this embodiment. Figure 10 is a diagram illustrating the process of forming a bag-shaped portion on the screen 220. Similar to the first embodiment, the screen 220 is constructed by forming a back-coated surface 220b on the back surface of the base fabric 220a coated with a back coating agent (coating material). Also, as shown in Figure 9(a), the screen 220 has three folds 222, 223-1, and 223-2 formed in a continuous straight line. Similar to the first embodiment, the three folds 222, 223-1, and 223-2 are formed on the back-coated surface 220b at the position where the bag-shaped portion 221 of the screen 220 is formed, as shown in Figure 10(a).

[0050] The continuous linear folds 222, 223-1, and 223-2 are formed in the same manner as in the first embodiment, as shown in Figure 9(b), by a rotary cutter RC equipped with a cutter blade CB around its entire circumference.

[0051] As shown in Figure 10(b), the screen 220 is folded back along the first fold 222 so that the three folds 222, 223-1, and 223-2 are positioned on the surface (outer surface of the bag-shaped portion 221). Then, the bag-shaped portion 221 is formed by folding and expanding the second folds 223-1 and 223-2 in a direction that separates them. The back coat surface 220b is highly rigid, but as in the first embodiment, it can be easily folded because the three folds 222, 223-1, and 223-2 are positioned on the surface (outer surface of the bag-shaped portion 221).

[0052] (Effects of the second embodiment) As described above, according to this embodiment, even a screen 220 whose rigidity is improved by the back coating agent (coating material) can be easily bent by forming three folds 222, 223-1, and 223-2 in a continuous straight line on the back coating surface 220b. Therefore, by bending the three folds 222, 223-1, and 223-2, the closed bag-shaped portion 221 can be deformed to expand, and the shaft can be easily inserted into the bag-shaped portion 221.

[0053] (Third embodiment) The screen 320 of the third embodiment of the roll screen 300 will be described with reference to Figure 11. Figure 11 is a diagram showing the screen 320 of the roll screen 300 of this embodiment. The screen 320 is constructed in the same way as in the first and second embodiments, with a back-coated surface 320b formed by coating the back surface of the base fabric 320a with a back-coating agent (coating material).

[0054] Similar to the first and second embodiments, the screen 320 has three folds 322, 323-1, and 323-2 at the positions where the bag-like portion is formed. The three folds 322, 323-1, and 323-2 are formed in a continuous straight line by, for example, marking the back coat surface 320b with a jig having three marking cutter blades spaced apart, and scraping (i.e., peeling off) the coating agent. Note that the marking does not necessarily have to be in a continuous straight line; it may be done in a dashed line.

[0055] The screen 320 is folded back along the first fold 322 so that the three folds 322, 323-1, and 323-2 are positioned on the surface (outer surface of the bag-like portion), and the second folds 323-1 and 323-2 are folded in a direction that separates them, causing it to expand and form a bag-like portion. The back coat surface 320b is highly rigid, but because the three folds 322, 323-1, and 323-2 are positioned on the surface (outer surface of the bag-like portion), it can be easily folded.

[0056] (Effects of the third embodiment) As described above, according to this embodiment, even a screen 320 whose rigidity is improved by the back coating agent (coating material) can be easily bent by forming three folds 322, 323-1, and 323-2 in a continuous straight line on the back coating surface 320b. Therefore, similar to the first and second embodiments, the closed bag-like portion can be deformed to expand by bending the three folds 322, 323-1, and 323-2, and the shaft can be easily inserted into the bag-like portion.

[0057] (Fourth embodiment) The screen 420 of the fourth embodiment of the roller screen will be described with reference to Figure 12. Figure 12 shows the screen 420 of the roller screen of this embodiment with the fold portion processed. The roller screen of this embodiment differs from the first to third embodiments in that the back surface (i.e., the exterior side) of the screen 420 is not coated with a back coating agent (covering material).

[0058] Figure 12 shows the state in which a fold is being processed on a screen 420 that does not have a back coat surface formed on it. The fold is processed on the screen 420 by a rotary cutter RC, as shown in Figure 12. The configuration of the rotary cutter RC is the same as in the first embodiment, so a description is omitted.

[0059] When the rotary cutter RC is moved over the screen 420 as shown by arrow a in Figure 12, cuts are formed in the screen 420 at regular intervals, creating three folds 422, 423-1, and 423-2. Since the three folds 422, 423-1, and 423-2 are formed in a dashed line pattern, the screen 420 is not cut.

[0060] The screen 420 is folded back along the first fold portion 422, and the second fold portions 423-1 and 423-2 are folded in a direction that separates them, causing it to expand and form a bag-like portion.

[0061] (Effects of the fourth embodiment) As described above, according to this embodiment, by forming three folds 422, 423-1, and 423-2 in the fabric of the screen 420, the screen 420 becomes easier to bend. Therefore, even if the screen 420 has rigid fabric, by bending the three folds 422, 423-1, and 423-2, the closed bag-like portion can be deformed to expand, and the shaft can be easily inserted into the bag-like portion.

[0062] (Fifth embodiment) The screen 520 of the fifth embodiment of the roller screen will be described with reference to Figure 13. Figure 13 shows the screen 520 of the roller screen of this embodiment with the fold portion processed. The roller screen of this embodiment differs from the first to third embodiments in that, similar to the fourth embodiment, the back surface (i.e., the outdoor side) of the screen 520 is not coated with a back coating agent (covering material).

[0063] Figure 13 shows the state in which a fold is being processed on a screen 520 that does not have a back coat surface formed on it. The fold is processed on the screen 520 by a rotary cutter RC, as shown in Figure 13. The configuration of the rotary cutter RC is the same as in the first embodiment, but the length of the blade is adjusted so that a cut is made in a part of the thickness direction of the screen 520 fabric.

[0064] When the rotary cutter RC is moved over the screen 520 as shown by arrow a in Figure 13, cuts are formed in the screen 520 at regular intervals, creating three folded sections 522, 523-1, and 523-2.

[0065] The screen 520 is folded back along the first fold 522 so that three folds 522, 523-1, and 523-2 are positioned on the surface (outer surface of the bag-like portion), and the second folds 523-1 and 523-2 are folded in a direction that separates them, causing it to expand and form a bag-like portion.

[0066] (Effects of the fifth embodiment) As described above, according to this embodiment, by forming three folds 522, 523-1, and 523-2 in the fabric of the screen 520, the screen 520 becomes easier to bend. Therefore, even if the screen 520 has rigid fabric, by bending the three folds 422, 423-1, and 423-2, the closed bag-like portion can be deformed to expand, and the shaft can be easily inserted into the bag-like portion. In addition, since cuts are made only in a part of the thickness direction of the fabric, the folds can be formed while maintaining the strength of the fabric.

[0067] The following describes variations of the screen 620 with reference to Figure 14. Figure 14 is a side cross-sectional view showing variations of the screen 620, where (a) is Variation 1, in which the screen 620 has a first fold portion 622 and one second fold portion 623-2; (b) is Variation 2, in which the screen 620 does not have a first fold portion but has two second fold portions 623-1 and 623-2; and (c) is Variation 3, in which the screen 620 has a first fold portion 622 and four second fold portions 623-1 to 623-4.

[0068] (Variation 1) In the modified example 1, as shown in Figure 14(a), the screen 620 has two folds: a first fold 622 formed at the folding position of the screen 120, and a second fold 623-2. The first fold 622 and the second fold 623-2 can form a bag-like portion 621. Therefore, the shaft 130 can be easily inserted into the bag-like portion 621.

[0069] (Modification 2) In the modified example 2, as shown in Figure 14(b), the screen 620 does not have a first fold formed at the folding position of the screen 120, but instead has two second folds 623-1 and 623-2. Although the first fold is not formed, a bag-like portion 621 can be formed by folding the two second folds 623-1 and 623-2 in a direction that separates them. Therefore, the shaft 130 can be easily inserted into the bag-like portion 621.

[0070] (Variation 3) In the third modified example, as shown in Figure 14(c), the screen 620 has a first fold portion 622 and four second fold portions 623-1 to 623-4. The four second fold portions 623-1 to 623-4 are formed in pairs on one side and the other side of the first fold portion 622, such that the distance to the first fold portion 622 is approximately equal. Therefore, the first fold portion 622 and the two pairs of second fold portions 623-1 to 623-4 can form a bag-like portion 621, making it easy to insert the shaft 130 into the bag-like portion 621. Also, since the two opposing sides of the hexagonal shaft 130 are positioned along the space between the upper and lower second fold portions 623-1 to 623-4, the bag-like portion 621 can stably hold the shaft 130.

[0071] Furthermore, the number of folds in the present invention does not necessarily have to be multiple, as long as it is possible to improve the workability when inserting the shaft 130 into the bag-like portion. For example, on the backcourt surface of the screen, only one fold may be formed at the folding point where the screen is folded back, or only one fold may be formed on one side or the other side that straddles the folding point.

[0072] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention.

[0073] For example, in the first embodiment described above, the folds 122, 123-1, and 123-2 are formed up to the insertion opening of the shaft 130, but the present invention is not limited to this example. It can be designed arbitrarily as long as it is possible to improve the workability when inserting the mounting member into the bag-like portion formed at the lower end of the screen. For example, the folds can be made to not be formed at least near the insertion opening of the mounting member. With such a configuration, the bag-like portion does not easily expand near the center of the screen, but can be expanded at the folds, making it easier to insert the mounting member. In addition, it is not necessary to form folds over the entire width of the screen, which improves workability. The second to fifth embodiments are similar.

[0074] Furthermore, although the first embodiment described above uses cuts to form the folds 122, 123-1, and 123-2, the present invention is not limited to this example. The design can be arbitrarily adapted as long as it improves the workability when inserting the mounting member into the pocket-shaped portion formed at the lower end of the screen. For example, the folds may be formed by indentations. This reduces damage to the screen caused by processing the folds and prevents the folds from penetrating the screen. The same applies to the second to fifth embodiments.

[0075] Furthermore, in the first embodiment described above, the folds 122, 123-1, and 123-2 were configured to be formed on the outer surface of the bag-shaped portion 121 when the bag-shaped portion 121 is formed, but the present invention is not limited to this example. It can be designed arbitrarily as long as it is possible to improve the workability when inserting the mounting member into the bag-shaped portion of the screen. For example, the folds may be configured to be formed on the inner surface of the bag-shaped portion when the bag-shaped portion is formed. The same applies to the second to fifth embodiments.

[0076] Furthermore, although a weight bar 140 was attached to the screen 120 in the first embodiment described above, the present invention is not limited to this example. Any bar material that can be attached to the screen 120 can be designed arbitrarily. The same applies to the second to fifth embodiments.

[0077] Furthermore, in the first embodiment described above, a shaft 130 with a hexagonal cross-section was used to attach the screen 120 to the weight bar 140, but the present invention is not limited to this example. Any elongated member that can be inserted into the bag-shaped portion can be designed arbitrarily. For example, a round bar may also be used. The same applies to the second to fifth embodiments.

[0078] Furthermore, in the first embodiment described above, the bag-like portion 121 was formed by folding the screen 120 and sewing it SW, but the present invention is not limited to this example. For example, the bag-like portion may be formed by inserting heat-seal tape between the folded screens and applying heat to fuse the fabrics together. The same applies to the second to fifth embodiments.

[0079] Furthermore, in the first embodiment described above, folds 122, 123-1, and 123-2 were formed on the screen 120 using a rotary cutter RC, but the present invention is not limited to this example. Any design is possible as long as folds can be formed on the screen. For example, a cutter with a general straight blade, laser processing, a plane with a narrow blade, etc., may be used. The same applies to the second to fifth embodiments.

[0080] The embodiments, applications, and modifications described above can be combined as appropriate. [Explanation of Symbols]

[0081] 100, 200, 300 Roller Blinds 110 bracket 112 Set Frame 114 Reel pipe 116 Front Cover 120, 220, 320, 420, 520, 620 screens 121, 221, 621 pouch 122, 222, 322, 422, 522, 622 First fold section 123-1~623-1, 123-2~623-2, 623-3, 623-4 Second fold section 124 Edge 130 Shaft (Mounting component) 140 Weight Bar (Bar Material) 142 Gap prevention member 144 Installation space 146 Aperture 120a, 220a, 320a base fabric 120b, 220b, 320b backcourt surfaces SW sewing (joining) RC Rotary Cutter (Processing Method) CB cutter blade

Claims

1. A screen for a blind, having a bag-like portion formed at one end into which a long mounting member for attaching a bar material can be inserted, The aforementioned bag-like portion is formed by folding and joining it at a folding point near one end. The bag-shaped portion is folded back and joined at a folding position near one end, and is formed with one or more folds formed along the insertion direction of the mounting member. The aforementioned bag-like portion can be deformed to expand into a bag shape by folding the aforementioned folded portion. A screen for blinds, characterized in that the aforementioned fold portion is a first fold portion formed only once at the aforementioned folding position.

2. The screen for blinds according to claim 1, characterized in that at least one of the front and back surfaces of the screen is covered with a covering material.

3. The screen for blinds according to claim 1, characterized in that the fold portion is a second fold portion formed on at least one side of the one side and the other side that straddle the first fold portion.

4. The screen for blinds according to claim 2, characterized in that the fold portion is formed by a part of the covering material being peeled off in a cut-like manner.

5. The screen for blinds according to claim 2, characterized in that the fold portion is formed on the surface that becomes the outer surface of the bag-shaped portion when the bag-shaped portion is formed.

6. The screen for a blind according to claim 3, characterized in that the second fold portion is formed in pairs on one side and the other side that straddle the first fold portion, such that the distance to the first fold portion is substantially equal.

7. The screen for a blind according to claim 1, characterized in that the fold portion is not formed at least near the insertion opening of the mounting member.

8. The screen for blinds according to claim 1, characterized in that the fold portion is formed in the shape of a dashed line.

9. The screen for blinds according to claim 1, characterized in that the fold portion is composed of an indentation.

10. The screen for blinds according to claim 1, characterized in that the fold portion is composed of a cut.

11. A blind comprising the screen according to any one of claims 1 to 10, the mounting member, and the bar material.

12. A method for manufacturing a screen for a blind, wherein a bag-shaped portion is formed at one end into which a long mounting member for attaching a bar material can be inserted, By processing means, one or more folds are formed near one end of the screen along the insertion direction of the mounting member. A method for manufacturing a screen for blinds, characterized by folding one end back and sewing it, and then forming a bag-like portion that can be deformed into a bag shape by folding one or more of the folded portions while the portion is sewn.

Images