Double-opening curtain structure

Abstract

When used in blackout curtains, it can achieve a complete blackout when fully closed with a simple structure. [Solution] The first curtain rail 1A and the second curtain rail 1B are arranged in parallel, maintaining a distance L0. The first curtain 11 is alternately attached to one side 4A of the first curtain rail 1A and one side 4B of the second curtain rail 1B. The second curtain 31 is alternately attached to the other side 5A of the first curtain rail 1A and the other side 5B of the second curtain rail 1B (a). A magnetic piece 29 is fixed to the free end 21 of the first curtain 11 (where the hook 26 is not attached), and a magnetic piece 49 corresponding to the magnetic piece 29 is fixed to the free end 41 of the second curtain 31 (a)(c) to form the curtain structure 50. When fully closed, both free ends 21 and 41 overlap and are held in place by the magnets 29 and 49, achieving a blackout.

Description

Technical Field

[0001] The present invention relates to a curtain structure in which a curtain hook is hooked on a runner that moves along a curtain rail, and in particular, to a so-called double-opening curtain structure in which a first curtain and a second curtain are attached from substantially the central portion.

Background Art

[0002] In the case of a curtain, a curtain hook is attached to a runner that moves along a curtain rail. In this case, there are a double-opening type in which a first curtain and a second curtain are attached and the first curtain and the second curtain are overlapped and closed at the central portion of the curtain rail, and both curtains are moved to both ends of the curtain rail to be fully opened, and a single-opening type in which a single curtain is attached to the curtain rail. When a curtain is attached to an opening, in the double-opening type, compared to the single-opening type, a gap is likely to occur at the overlapping portion of the two curtains when fully closed, and it was difficult to create a completely sealed environment called so-called blackout. In particular, in accommodation facilities such as hotels, a blackout environment has been required.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

[0004] In Patent Document 1, a special cross runner is used to overlap the curtains on both sides at the runner portion to achieve sealing.

Problems to be Solved by the Invention

[0005] However, in the curtain described in Patent Document 1, the ends of both curtains are closed with the cross runner in between, resulting in insufficient sealing from the middle to the bottom of the curtain in the vertical direction. Furthermore, the use of a specially structured cross runner caused problems as it got in the way when the curtain was fully closed. [Means for solving the problem]

[0006] The present invention solves the aforementioned problems by constructing a curtain rail from a first curtain rail and a second curtain rail arranged in parallel, hanging curtains on the first and second curtain rails respectively, and further forming free ends on the curtains that are not attached to runners to create a curtain structure.

[0007] In other words, this invention is a double-opening curtain structure characterized by the following configuration, in which a group of runners that move along a curtain rail are used to attach the hooks of a first curtain to one side in the longitudinal direction of the curtain rail, and the group of runners is used to attach the hooks of a second curtain to the other side, thereby separating the overlapping portion of the first curtain and the overlapping portion of the second curtain in the center. (1) The curtain rail is configured to include a first curtain rail and a second curtain rail that are placed in parallel with a distance L0 between them. (2) The overlapping portion of the first curtain and the overlapping portion of the second curtain are structured to overlap near the center of both curtain rails, and the portion other than the overlapping portion is the standard portion. (3) In the standard sections of both curtains, adjacent hooks are alternately attached to the runners of the first curtain rail and the runners of the second curtain rail. (4) At the overlapping portion of the two curtains, a first free end is formed on the edge side of the first curtain and a second free end is formed on the edge side of the second curtain. (5) The first free end and the second free end are designed not to be locked to the curtain runner, and the first free end and the second free end are made capable of contacting each other over a surface. (6) A retaining means is formed on one or both of the opposing surfaces of the first free end and the second free end, which can detachably contact the opposing surfaces.

[0008] Furthermore, the above-mentioned double-opening curtain structure is characterized by being configured as follows. (1) The base hook of the first free end of the first curtain is attached to the runner of the first curtain rail, and the adjacent hook of the first curtain that is adjacent to the base hook is attached to the first curtain runner. (2) The base end hook of the second free end of the second curtain is attached to the runner of the second curtain rail, and the adjacent hook of the second curtain adjacent to the base end hook is attached to the second curtain runner.

[0009] Furthermore, the curtain structure described above is characterized by being configured as follows. (1) In the first and second curtains, elongated pockets are formed in the vertical direction at the positions where the hooks are attached, and a shape-retaining rod is inserted into the elongated pocket.

[0010] Furthermore, the curtain structure described above is characterized by being configured as follows. (1) In the first and second curtains, a wide pocket section with an opening at the upper edge is formed between the position where the hook is attached and the position where the adjacent hook is attached, and a sound-absorbing plate material is inserted into the elongated pocket section.

[0011] Furthermore, the curtain structure described above is characterized by being configured as follows. (1) The first and second curtains were made by overlapping two rectangular pieces of fabric, sewing three sides excluding the top edge, turning them inside out to form a fabric base, and creating an opening at the top edge.

[0012] Furthermore, the curtain structure is characterized by being configured as follows: (1) If the distance between adjacent hooks in the first and second curtains is D1, D1 = 0.5 × L0 ~ 1.5 × L0 That's what I decided.

[0013] The curtain rail described above typically consists of two separate, straight curtain rails, a first and a second, arranged in parallel. In this case, the runners cannot move from the first curtain rail to the second curtain rail. Furthermore, as long as there are parallel first and second curtain rails, the configuration of the curtain rails is arbitrary. For example, the first and second curtain rails can be connected at one end with a U-shaped curved curtain rail in plan view. In this case, the runners can be made movable between the first and second curtain rails. Furthermore, the ends of the parallel first and second curtain rails can be connected by a U-shaped curved curtain rail in plan view to form a curtain rail. In this case, the curtain rail will be oval-shaped in plan view. [Effects of the Invention]

[0014] This invention involves arranging a first curtain rail and a second curtain rail in parallel, alternately attaching the first curtain to one side of each rail, and alternately attaching the second curtain to the other side of each rail, creating a structure that allows the overlapping portions of the first and second curtains to be separated in the center. Therefore, despite being a simple structure using such general-purpose curtain rails, the overlapping portions of both curtains near the center allow for a blackout when fully closed. Furthermore, when fully open, only about half of the curtains need to be bundled on each rail, thus reducing the required curtain storage space. [Brief explanation of the drawing]

[0015] [Figure 1] In the schematic diagram illustrating an embodiment of this invention, (a) is a plan view of the curtain in a closed state, (b) is a plan view of the curtain in a closed state, (c) is a partial plan view showing the free end just before closing, and (c) is a partial plan view of another embodiment showing the free end just before closing. [Figure 2] This is a schematic diagram showing an embodiment of the present invention, representing a partial front view near the center. [Figure 3] This is a schematic diagram showing another embodiment of the present invention, where (a) represents a plan view with the curtain closed and (b) represents a plan view with the curtain open.

Embodiments for Carrying Out the Invention

[0016] Based on the drawings, embodiments of the present invention will be described. 1. Structure of the curtain rail

[0017] (1) The curtain rail has a normal length corresponding to an opening such as a window and is composed of a first curtain rail 1A and a second curtain rail 1B. The first curtain rail 1A and the second curtain rail 1B are arranged in parallel while maintaining a distance L0. A large number of runners 7A that can move in the length direction 10 of the curtain rail are attached to the first curtain rail 1A. Similarly, a large number of runners 7B that can move in the length direction 10 of the curtain rail are attached to the second curtain rail 1B.

[0018] (2) In the length direction 10 of the first curtain rail 1A, with the central part 3A in between, it is divided into one side 4A and the other side 5A. The end of one side 4A (opposite to the central part 3A) is designated as one end 4Aa, and the end of the other side 5A (opposite to the central part) is designated as the other end 5Aa. Similarly, in the length direction 10 of the second curtain rail 1B, with the central part 3B in between, it is divided into one side 4B and the other side 5B. The end of one side 4B (opposite to the central part 3B) is designated as one end 4Ba, and the end of the other side 5B (opposite to the central part 3B) is designated as the other end 5Ba.

[0019] 2. Structure of the curtain

[0020] (1) The curtain consists of a first curtain 11 attached to one sides 4A, 5A of each curtain rail 1A, 1B and a second curtain 31 attached to the other sides 5A, 5B. Each of the curtains 11, 31 is sewn by overlapping two pieces of fabric, closing the hem, and having an opening at the upper end.

[0021] (2) The sewing of each curtain is as follows: (A) Using two pieces of fabric cut to the same shape, fold the seam allowance of the top edge outwards and sew the top edges together. (B) With the top edges of the two pieces of fabric sewn together, turn them inside out and place them on top of each other with the seam allowances facing outwards. (C) Sew the two sides and the bottom edge of the layered fabric together, leaving a seam allowance. (D) Turn the sewn fabric inside out. (E) The fabric is sewn inside out, forming a bag shape with an open top edge, and is shaped by ironing. (F) Along the length 10 of the curtain rail to be installed, two rows of vertical stitching are made in parallel from the opening at the top edge 14 (34) to the bottom edge (hem) 15 (35) for every width D1. These two rows of vertical stitching form a narrow vertical pocket 17 (37) for inserting the shape-retaining rod material 19 (39), and a narrow opening 17a (37a) is formed at the upper end of the narrow vertical pocket 17 (37) (Figure 2, Figure 1(a)).

[0022] (3) In addition, along the length of the curtain rail 11, the side edges located at the central parts 3A and 3B of the curtain rails 1A and 1B are designated as one side edge 12 for the first curtain 11, and the side edge on the opposite side is designated as the other side edge 13 (Figure 2, Figure 1(a)).

[0023] (4) However, on the side of the first curtain 11 located at the central part 3A(3B) of the curtain rail 1A(1B) (i.e., the side of one side edge 12 of the first curtain 11), two rows of vertical stitching are made from the side edge 12 at a position of width D21 to form a vertical narrow pocket 17, and a free end portion 21 of width D21 is formed on the side of the side edge 12. The tip 21a of the free end portion 21 will coincide with the side edge 12. In the length direction 10 of the curtain rail, the side opposite the tip 21a of the free end portion 21 is the base end 22b, and two rows of vertical stitching are made from the base end 22b of the free end portion 21 at a position of width D31 on the other side edge 13 to form a vertical narrow pocket 17. Here, a connecting auxiliary portion 25 of width D31 is formed following the free end portion 21 of width 21 (Figures 1(a)(c), 2). Similarly, with respect to the second curtain 31, on the side of the second curtain 31 located at the central part 3A (3B) of the curtain rail 1A (1B) (i.e., the side of one side edge 32 of the second curtain 31), two rows of vertical stitching are performed at a position of width D22 from the side edge 32 to form a narrow vertical pocket 37, and a free end portion 41 of width D22 is formed on the side of the side edge 32. The tip 41a of the free end portion 41 coincides with the side edge 32. In the length direction 10 of the curtain rail, the opposite side of the tip 41a of the free end portion 41 is the base end 42b, and two rows of vertical stitching are performed from the base end 22b of the free end portion 41 at a position of width D33 on the other side edge 13 to form a narrow vertical pocket 37. Here, a connecting auxiliary portion 45 of width D32 is formed following the free end portion 21 of width D22 (Figures 1(a)(c), 2).

[0024] (5) In addition, shape-retaining rods 19 and 39 are inserted into the vertical narrow pocket sections 17 and 37 through the narrow openings 17a and 37a of the upper edges 14 and 34 of the first curtain 11 and the second curtain 31. Also, hooks 26 and 46 are fixed at or near the location of the narrow openings (vertical narrow pocket sections) 17a and 37a to be attached to the runners 7A and 7B of the respective curtain rails 1A and 1B (Figure 2). Furthermore, in the first curtain 11, a wide bag section 18 with a wide opening 18a of widths D1, D21, and D22 is formed between each elongated bag section 17, 17. Similarly, in the second curtain 31, a wide bag section 38 with a wide opening 38a of widths D1, D22, and D32 is formed between each elongated bag section 37, 37 (Figure 2).

[0025] (6) Furthermore, no hook 26 is provided at the tip 22a of the free end 21 of the first curtain 11 (i.e., one side edge 12 of the first curtain 11). Also, the hook 26 located at the base end 22b of the free end 21 (the narrow opening 17a of the vertical narrow pocket portion 17) is designated as the base end hook 27. The adjacent hook 26 on the other side circle 13 of the base end hook 26 is designated as the adjacent hook 28. Therefore, the distance D31 is between the base end hook 27 and the adjacent hook 28, and this portion becomes the connecting auxiliary portion 25 (Figure 2, Figure 1(a)). Similarly, no hook 46 is provided at the tip 42a of the free end 41 of the second curtain 31 (i.e., one side edge 32 of the second curtain 31). Also, the hook 46 located at the base end 42b of the free end 41 (the narrow opening 37a of the vertical narrow pocket portion 37) is designated as the base hook 47. The adjacent hook 46 on the other side edge 33 of the base hook 46 is designated as the adjacent hook 48. Therefore, the distance D32 is between the base hook 47 and the adjacent hook 48, and this portion becomes the connecting auxiliary portion 45 (Figure 2, Figure 1(a)).

[0026] 3. Curtain structure

[0027] (1) The first curtain rail 1A and the second curtain rail 1B are fixed in parallel to the ceiling of the curtain mounting location (such as the ceiling surface of the curtain box) at a distance L0.

[0028] (2) The first curtain 11 is attached to one side 4A of the first curtain rail 1A and one side 4B of the second curtain rail 1B, and the second curtain 31 is attached to the other side 5A of the first curtain rail 1A and the other side 5B of the second curtain rail 1B. As described above, hooks 26 and 46 are fixed to each curtain 11 and 31 at distances D1, for attachment to the runners 7A and 7B of the respective curtain rails 1A and 1B, and of course, L0 <D1 This is the configuration. However, the following describes the setup in which hooks 26, 46, etc., are attached to runners 7A, 7B, including near the edges 12, 31 of each curtain 11, 31 located near the central parts 3A, 3B of each curtain rail 1A, 1B.

[0029] (3) For the first curtain 11, the base hook 27 is attached to the runner near the center 3A of the first curtain rail 1A, and the adjacent hook 28 is attached to the adjacent runner 7A at the end 4Aa of one side 4A of the first curtain rail 1A. Also, on the first curtain 11, the hook 26 on the side edge 13 of the adjacent hook 28 is attached to the runner 7B of the second curtain rail 1B. The hook 26 on the other side edge 13 of that hook 26 is then attached to the runner 7A of the first curtain rail 1A. Similarly, the hooks 26 on the side edge 13 are alternately attached to the runner 7B of the second curtain rail 1B and the runner 7A of the first curtain rail 1A, so that the first curtain 11 is arranged in a zigzag pattern in plan view (left side of Figure 1(a)).

[0030] (4) For the second curtain 31, the base hook 47 is attached to the runner 7B near the center 3B of the second curtain rail 1B, and the adjacent hook 48 is attached to the adjacent runner 7B at the other end 5B 5Ba of the second curtain rail 2B. Also, on the second curtain 31, the hook 46 on the other side edge 33 of the adjacent hook 48 is attached to the runner 7A of the first curtain rail 1A. The hook 46 on the other side edge 33 of that hook 46 is attached to the runner 7B of the second curtain rail 1B. Similarly, the hooks 46 on the other side edge 33 are alternately attached to the runner 7B of the second curtain rail 1B and the runner 7A of the first curtain rail 1A, so that the second curtain 31 is arranged in a zigzag pattern in plan view (right side of Figure 1(a)).

[0031] (5) In addition, a magnet piece 29 is fixed to the inner surface 23a (the surface on the side of the second curtain 31) at the free end 21 of the first curtain 11, and a magnet piece 49 corresponding to the magnet piece 29 is fixed to the inner surface 43a (the surface on the side of the first curtain 11) at the free end 41 of the second curtain 31 (Figure 1(a)(c)).

[0032] (6) The curtain structure 50 is constructed as described above (Figures 1 and 2). In the first curtain 11 (second curtain 31), the free end 21 (free end 41) and the connecting auxiliary part 25 (connecting auxiliary part 25) are combined to form an "overlapping section". Also, normally, L0 = 65 mm Set it to a certain extent, L0 = 30-100 mm A degree that seems desirable,

[0033] (7) Also, sewn using general blackout curtain fabric and decorative curtain fabric In that case, according to the experiment, D1=“0.3×L0” ~ “2.0×L0” To a certain extent is preferable, but more D1=“0.5×L0” ~ “1.5×L0” The curtains will be manufactured within this range. In this case, when the curtains are fully closed, the first curtain 11 and the second curtain 31 will fold neatly without protruding from the first curtain rail 1A and the second curtain rail 1B in a plan view. Also, when the curtains are fully closed, the first curtain 11 and the second curtain 31 will be neatly arranged in a zigzag pattern between the first curtain rail 1A and the second curtain rail 1B in a plan view.

[0034] 4. Regarding the use of curtain structure 50,

[0035] (1) When fully closed, the free end 21 (overlapping portion) of the first curtain 11 and the free end 41 (overlapping portion) of the second curtain 31 are moved towards the center 3A of the first curtain rail 1A and the center 3B of the second curtain rail 1B (Figure 1(c)). In this state, the magnets 29 and 49 are fixed to the inner surfaces 23a and 43a of the free ends 21 and 41, so the magnets 29 and 49 are not visible.

[0036] (2) Next, the inner surface 23a of the free end 21 and the inner surface 43a of the free end 41 are overlapped (Figure 1(c)), and the magnets 29 and 49 are locked together to maintain close contact between the inner surface 23a of the free end 21 and the inner surface 43a of the free end 41 (Figure 1(a)). As a result, the first curtain 11 and the second curtain 31 overlap without any gaps, achieving a sealed environment that prevents blackouts. Furthermore, the connecting auxiliary parts 25 and 45 cover the contact surfaces of the inner surface 23a of the free end 21 and the inner surface 43a of the free end 41, thus ensuring a more reliable sealed state (Figure 1(a)).

[0037] (3) When fully opening the curtains, just like with normal curtains, the first curtain 11 is moved to the end 4Aa of one side 4A of the first curtain rail 1A and the end 4Ba of one side 4B of the second curtain rail 1B, and the second curtain 31 is moved to the end 5Aa of the other side 5A of the first curtain rail 1A and the end 5Ba of one side 5B of the second curtain rail 1B, and the curtains can be easily fully opened (Figure 1(b)). At this time, there is a space of length L0 between the first curtain rail 1A and the second curtain rail 1B, so the thickness of the folded curtain fabric is absorbed on either the first curtain 11 side or the second curtain 31 side, and the curtains can be folded compactly in the length direction 10 of the curtain rail. Furthermore, in a plan view, the outward protrusion of the first curtain rail 1A and the second curtain rail 1B is kept to a minimum. In other words, the first curtain 11 and the second curtain 31 can be almost entirely contained within length L0.

[0038] (4) Also, since two curtain rails, the first curtain rail 1A and the second curtain rail 1B, the hooks 26 (46) can be positioned lower relative to the upper edge 14 of the first curtain rail 1A (the upper edge 34 of the second curtain 31). In this case, the upper edge 14 of the first curtain rail 1A (the upper edge 34 of the second curtain 31) can be overlapped vertically with the first curtain rail 1A and the second curtain rail 21B. In this case, a valance to conceal the curtain rails from the ceiling can be made unnecessary.

[0039] 5. Regarding other embodiments,

[0040] (1) In the above embodiment, a magnetic piece 29 is provided on the inner surface 22a of the free end 21 of the first curtain 11, and a magnetic piece 49 is provided corresponding to the inner surface 42a of the free end 41 of the second curtain 31. However, it is also possible to provide a magnetic piece 29 on the outer surface 22b of the free end 21 and a magnetic piece 49 corresponding to the outer surface 42b of the free end 41 (Figure 1(d)). In this case, as mentioned above, there is the disadvantage that the magnetic pieces 29 and 49 are visible, and there is a risk that the light-blocking performance may be slightly weaker.

[0041] (2) In addition, in the above embodiment, the connecting auxiliary portion 25 of the first curtain 11 and the connecting auxiliary portion 45 of the second curtain 31 can be omitted (Figure 3). In this case, the "overlapping portion" is formed only from the free end portion 21 (31). In this case, however, the contribution of the connecting auxiliary part 25(45) to the light-shielding effect will be lost, resulting in a slight decrease in the light-shielding effect.

[0042] (3) In addition, a plate-shaped sound-absorbing material (for example, a plate material made by compression molding of fiber material) can be inserted into the wide pocket section 18 of the first curtain 11 and the wide pocket section 38 of the second curtain 31 (not shown). Sound absorption and sound insulation effects can be obtained by selecting the fabric material of the first curtain 11 and the second curtain 31, but a further soundproofing effect can be expected with the addition of sound-absorbing material. In this case, after the curtain structure 50 has been constructed, it is possible to add sound-absorbing material later through the wide opening 18a of the wide pocket section 18 and the wide opening 38a of the wide pocket section 38.

[0043] (4) In addition, in the above embodiment, the indoor environment can be adjusted by appropriately combining sound-absorbing material in the wide pocket portion 18 of the first curtain 11 and sound-insulating material (such as resin or metal plate) in the wide pocket portion 38 of the second curtain 31 (not shown).

[0044] (5) In the above embodiment, magnets 29 and 49 were used to secure the free end 21 and the free end 41 together, but other materials such as hook-and-loop fasteners or various hooks can also be used (not shown).

[0045] (6) In addition, in the above embodiment, the vertical narrow pocket sections 17 and 37 can be omitted, and the shape-retaining rod 19(39) can be directly attached to the first curtain 11 and the second curtain 31 (not shown). Furthermore, the shape-retaining rod 19(39) can also be omitted (not shown).

[0046] (7) In addition, in the above embodiment, the wide pocket portion 18(38) can be omitted, and the upper edges 14(34) of the first curtain 11 and the second curtain 31 can be closed without forming an opening (not shown).

[0047] (8) In the above embodiment, the first curtain 11 and the second curtain 31 were constructed by combining two pieces of fabric, but the selection of fabric and sewing methods are arbitrary, such as constructing them from a single piece of fabric. Also, the first curtain 11 and the second curtain 31 can have different structures (fabric, sewing) (not shown). [Explanation of Symbols]

[0048] 1A First Curtain Rail 3A Central section (first curtain rail) 4A One side (first curtain rail) 4Aa One end (first curtain rail) 5A Other side (first curtain rail) 4Aa The other end (first curtain rail) 7A Runner (First Curtain Rail) 1B Second curtain rail 3B Central section (second curtain rail) 4B One side (second curtain rail) 4Ba One end (second curtain rail) 5B Other side (second curtain rail) 4Ba Other end (second curtain rail) 7B Runner (Second Curtain Rail) 10. Length of the rail 11 First Curtain 12. One edge of the first curtain (the side facing the center of the curtain rail) 13. Other edge of the second curtain 14. Upper edge of the second curtain 15. The lower edge (hem) of the second curtain 17. Vertical narrow pocket section (first curtain) 17a Narrow opening in the vertical narrow pocket section (first curtain) 18. Wide pocket section (first curtain) 18a Wide opening of the wide bag section (first curtain) 19. Shape-retaining rod material (Daiichi Curtain) 21. Free end (first curtain) 22a Tip of the free end (first curtain) 22b Base of the free end (first curtain) 23a Inner surface of the free end (first curtain) 23b Outer surface of the free end (first curtain) 25. Connecting auxiliary section (first curtain) 26 Hooks (First Curtain) 27 Base hook (first curtain) 28 Adjacent hook (first curtain) 29. Magnet (First curtain. Holding means) 31 Second Curtain 32. One edge of the second curtain (the side facing the center of the curtain rail) 33 The other side edge of the second curtain 34. Upper edge of the second curtain 35. The lower edge (hem) of the second curtain 37. Vertical narrow pocket section (second curtain) 37a Narrow opening in the vertical narrow pocket section (second curtain) 38 Wide pocket section (second curtain) 38a Wide opening in the wide bag section (second curtain) 39. Shape-retaining rod material (second curtain) 41. Free end (second curtain) 42a Tip of the free end (second curtain) 42b Base of the free end (second curtain) 43a Inner surface of the free end (first curtain) 43b Outer surface of the free end (second curtain) 45. Connecting auxiliary section (second curtain) F46 Hook (Second Curtain) 47 Base hook (second curtain) 48 Adjacent hook (second curtain) 49. Magnet (Second curtain. Main holding plan)

Claims

1. A group of runners moves along the curtain rail, with the hooks of the first curtain attached to one side along the length of the curtain rail, and the hooks of the second curtain attached to the other side of the group of runners. A double-opening curtain structure characterized by having the overlapping portion of the first curtain and the overlapping portion of the second curtain separated at the center, and configured as follows. (1) The curtain rail is configured to include a first curtain rail and a second curtain rail that are placed in parallel with a distance L0 between them. (2) The overlapping portion of the first curtain and the overlapping portion of the second curtain are structured to overlap near the center of both curtain rails, and the portion other than the overlapping portion is the standard portion. (3) In the standard sections of both curtains, adjacent hooks are alternately attached to the runners of the first curtain rail and the runners of the second curtain rail. (4) At the overlapping portion of the two curtains, a first free end is formed on the edge side of the first curtain and a second free end is formed on the edge side of the second curtain. (5) The first free end and the second free end are designed not to be locked to the curtain runner, and the first free end and the second free end are made capable of contacting each other over a surface. (6) A retaining means is formed on one or both of the opposing surfaces of the first free end and the second free end, which can detachably contact the opposing surfaces.

2. The double-opening curtain structure according to claim 1, characterized in that it is configured as follows. (1) The base hook of the first free end of the first curtain is attached to the runner of the first curtain rail, and the adjacent hook of the first curtain that is adjacent to the base hook is attached to the first curtain runner. (2) The base end hook of the second free end of the second curtain is attached to the runner of the second curtain rail, and the adjacent hook of the second curtain adjacent to the base end hook is attached to the second curtain runner.

3. The curtain structure according to claim 1, characterized in that it is configured as follows. (1) In the first and second curtains, elongated pockets are formed in the vertical direction at the positions where the hooks are attached, and a shape-retaining rod is inserted into the elongated pocket.

4. The curtain structure according to claim 1, characterized in that it is configured as follows. (1) In the first and second curtains, a wide pocket section with an opening at the upper edge is formed between the position where the hook is attached and the position where the adjacent hook is attached, and a sound-absorbing plate material is inserted into the elongated pocket section.

5. The curtain structure according to claim 4, characterized in that it is configured as follows. (1) The first and second curtains were made by overlapping two rectangular pieces of fabric, sewing three sides excluding the top edge, turning them inside out to form a fabric base, and creating an opening at the top edge.

6. The curtain structure according to claim 1, characterized in that it is configured as follows. (1) If the distance between adjacent hooks in the first and second curtains is D1, D1=0.5×L0~1.5×L0 That's what I decided.

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