Blind

Abstract

To provide a blind capable of promoting air circulation in a room.SOLUTION: A blind 100 is a vertical blind in which a louver 130 is suspended from each of a plurality of carriers 120 arranged at a predetermined interval in a longitudinal direction within a head rail 110. The louver 130 has a hollow portion 130a formed between a first louver portions 131 and a second louver portions 132 which are a pair of fore and aft formed integrally or separately, and penetrating in a vertical direction. At least one of the first louver portion 131 and the second louver portion 132 has an upper ventilation portion 136 and a lower ventilation portion 137 formed near one end in the vertical direction to ventilate between the outside and the hollow portion 130a, and the upper ventilation portion 136 and the lower ventilation portion 137 face the other of the first louver portion 131 and the second louver portion 132. The blind capable of promoting air circulation in a room can be provided.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a blind.

Background Art

[0002] As a conventional blind, there is one disclosed in Japanese Patent Publication No. 10-508920 (Patent Document 1). The blind disclosed in this document has vanes as louvers suspended by an operating device, and first and second walls, and an elongated cylindrical body. The cylindrical body is formed of a flexible material and has a strip made of a reinforcing material at the top end. The strip defines an attachment position for connecting the vane to the operating device.

[0003] According to this, when light passes through the hollow vanes, the shadow created by the two vanes overlapping is diffused due to the cylindrical shape of the vanes, making the shadow unclear and obtaining a preferably softened appearance.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in a conventional blind as shown in Patent Document 1, generally, a blind having a hollow layer has excellent heat insulation properties, and the ventilation between the spaces separated by the blind is restricted. While there is the advantage of improved heat insulation performance, there is a problem that condensation easily occurs on the glass surface in winter. Also, from the perspective of preventing infectious diseases, the importance of ventilation has been reexamined in order to circulate the indoor air. For this reason, there has been a problem of wanting to promote the circulation of air indoors.

[0006] Therefore, the present invention has been made in view of such problems, and an object thereof is to provide a blind that can promote the circulation of air in a room.

Means for Solving the Problems

[0007] In order to solve the above problems, according to the present invention, there is provided a vertical blind in which louvers are suspended from each of a plurality of carriers arranged at predetermined intervals in the longitudinal direction within a headrail, wherein the louvers are formed with a hollow portion (air layer) penetrating in the vertical direction between a pair of front and rear shielding portions formed integrally or separately, and at least one of the shielding portions is formed with a ventilation portion for ventilating between the outside and the hollow portion in the vicinity of one end in the vertical direction, and the ventilation portion faces the other shielding portion. A blind is provided.

[0008] According to such a configuration, by forming a ventilation portion in a part of one shielding portion, air inflow and exhaust easily occur in the hollow portion formed by the pair of shielding portions, and the circulation of air in the room where the blind is installed can be promoted.

[0009] Also, various application examples of the present invention can be considered. For example, the ventilation portions may be formed in the vicinity of the lower end of one of the pair of front and rear shielding portions and in the vicinity of the upper end of the other shielding portion of the louvers. According to such a configuration, by forming ventilation portions at both the upper and lower ends of the louvers, air flows in from one ventilation portion and is exhausted from the other ventilation portion, so that the circulation of air can be activated. In particular, the circulation of air between the indoor side and the outdoor side separated by the blind can be promoted.

[0010] Also, the ventilation portion may be formed by the difference in the hanging heights of the front and rear shielding portions from the carrier. According to such a configuration, a ventilation portion can be formed in the louvers only by changing the hanging heights of the pair of front and rear shielding portions.

[0011] Further, the ventilation portion may be formed by a hole portion or a mesh portion formed in the shielding portion. According to such a configuration, the ventilation portion can be formed in the louver only by processing a part of the shielding portion.

[0012] Further, the louver is composed of a first louver portion forming one of the shielding portions, and a second louver portion forming the other shielding portion and being separate from the first louver portion. The carrier is provided with a pair of front and rear carrier hook portions that can rotate about the shaft portion of the carrier. The first louver portion is suspended from one of the carrier hook portions by a first louver hook provided at the upper end, and the second louver portion may be suspended from the other carrier hook portion directly or via a hanger member by a second louver hook provided at the upper end. According to such a configuration, two shielding portions constituting the louver can be suspended from one carrier. Therefore, by rotating the carrier, the two shielding portions can be rotated about the shaft portion, and the position of the ventilation portion can be switched in the front-rear direction.

[0013] Further, the first louver hook and the second louver hook may suspend the first louver portion and the second louver portion in a state where the side end portions of each other are in contact or joined. According to such a configuration, by attaching the carrier with both end portions of the two louver hooks being close to each other, the two shielding portions can be suspended in a state where both end portions are in contact with each other. Therefore, the gap between both edges of the first louver portion and the second louver portion is reduced, and the air inside the louver easily circulates in the vertical direction.

[0014] Further, the first louver portion and the second louver portion may be configured to have a substantially arc-shaped cross section. According to such a configuration, a substantially cylindrical louver can be easily formed by the two louver portions.

Advantages of the Invention

[0015] According to the present invention, in the blind, it is possible to promote the circulation of air in the room. Other effects of the present invention will also be described in the form for carrying out the invention described later.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Best Mode for Carrying Out the Invention

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configuration are denoted by the same reference numerals, and redundant description is omitted.

[0018] (First Embodiment) The overall configuration of the blind 100 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a front view showing the overall configuration of the blind 100 of the first embodiment and showing the state in which the louver 130 is opened. FIG. 2 is a front view showing the overall configuration of the blind 100 of the first embodiment and showing the state in which the louver 130 is closed.

[0019] As shown in FIGS. 1 and 2, the blind 100 is a vertical blind in which louvers 130 are suspended from each of a plurality of carriers 120 arranged at predetermined intervals in the longitudinal direction within a head rail 110. The louver 130 is formed with a hollow portion 130a that constitutes an air layer penetrating in the vertical direction between a pair of front and rear first louver portions 131 (shielding portions) and second louver portions 132 (shielding portions) formed integrally or separately. At least one of the first louver portion 131 and the second louver portion 132 is formed with ventilation portions 136 and 137 for ventilating between the outside and the hollow portion 130a in the vicinity of one end in the vertical direction, and the ventilation portions 136 and 137 are configured to face the ends of the other first louver portion 131 and second louver portion 132. Hereinafter, each component will be described.

[0020] (Head rail 110) As shown in FIGS. 1 and 2, the head rail 110 suspends and supports the first louver portion 131 and the second louver portion 132 so as to be movable in the longitudinal direction. The head rail 110 is attached to a window frame or the like by brackets 111. A plurality of carriers 120 are arranged in the head rail 110 so as to be movable in the longitudinal direction. The front and rear lower ends of the head rail 110 protrude downward to a position overlapping the upper part of a carrier hook 124 described later (see FIG. 4).

[0021] As shown in FIGS. 1 and 2, an opening / closing cord 112 for operating the opening and closing of the first louver portion 131 and the second louver portion 132 and a drive shaft 113 for operating rotation are provided in the head rail 110. One end of the opening / closing cord 112 is led out from the vicinity of one end of the head rail 110 to constitute an opening / closing operation portion 114 for operating the opening and closing of the first louver portion 131 and the second louver portion 132. One end of the drive shaft 113 is connected to a rotation operation portion 115 that hangs down from the vicinity of one end of the head rail 110, and the drive shaft 113 is rotationally driven by the rotation operation of the rotation operation portion 115.

[0022] (Carrier 120) As shown in FIGS. 1 and 2, a plurality of carriers 120 are arranged on the head rail 110, and a master carrier 120M is arranged at one end of the head rail 110. The carrier 120 and the master carrier 120M mainly differ in the following points, and other points are the same. That is, an opening / closing cord 112 is movably inserted into the carrier 120, and the opening / closing cord 112 is connected to the master carrier 120M. Hereinafter, taking the carrier 120 as an example, the configuration will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view of the carrier 120. FIG. 4 is a view showing the carrier 120 arranged on the head rail 110.

[0023] As shown in FIGS. 3 and 4, the carrier 120 includes a worm 121 that meshes with a drive shaft 113 inserted therethrough and rotates integrally, a worm wheel 122 that meshes with the worm 121, and a carrier shaft portion 123 that protrudes below the carrier 120 and rotates integrally with the worm wheel 122. A carrier hook 124 that suspends and supports the first louver portion 131 and the second louver portion 132 is connected to the carrier shaft portion 123 so as to rotate integrally.

[0024] As shown in FIGS. 3 and 4, the carrier hook 124 has a first hook portion 125 and a second hook portion 126 at both ends. The first hook portion 125 and the second hook portion 126 lock the first louver hook 133 and the second louver hook 134 to which the first louver portion 131 and the second louver portion 132 described later are connected (see FIG. 5). The first hook portion 125 and the second hook portion 126 are spaced apart by a width slightly smaller than the width of the head rail 110 in the front-rear direction.

[0025] Near both ends of the lower part of the carrier 120, as shown in FIG. 4, insertion holes 127 through which the opening / closing cord 112 is movably inserted are formed. As described above, the opening / closing cord 112 is connected to the master carrier 120M. When the opening / closing operation unit 114 is operated, power for moving along the head rail 110 is transmitted to the master carrier 120M. The master carrier 120M and the adjacent carriers 120, and adjacent carriers 120 are connected by spacer links 128. Therefore, when the opening / closing operation unit 114 is operated and the master carrier 120M moves along the head rail 110, each carrier 120 is pulled by the spacer link 128, and the first louver part 131 and the second louver part 132 suspended from the master carrier 120M and each carrier 120 move in the deployment and folding directions.

[0026] (Louver 130) As shown in FIGS. 1 and 2, the louver 130 is suspended from each of the carriers 120 and the master carrier 120M. Hereinafter, the configuration of the louver 130 will be described with reference to FIGS. 5 to 8. FIG. 5 is a diagram for explaining the configuration of the first louver hook 133, the second louver hook 134, and the hanger member 135. FIG. 6 is a perspective view showing a state in which the louver 130 is attached to the carrier 120. FIG. 7 is a longitudinal sectional view showing a state in which the second louver part 132 is arranged in the front. FIG. 8 is a longitudinal sectional view showing a state in which the first louver part 131 is arranged in the front.

[0027] As shown in FIGS. 5 and 6, the louver 130 is composed of a first louver part 131 forming one shielding part, and a second louver part 132 forming the other shielding part and separate from the first louver part 131. The first louver part 131 is suspended from the first hook part 125 by a first louver hook 133 provided at the upper end, and the second louver part 132 is suspended from the second hook part 126 via a hanger member 135 by a second louver hook 134 provided at the upper end.

[0028] First, the first louver part 131, the second louver part 132, the first louver hook 133, the second louver hook 134, and the hanger member 135 for suspending and supporting them will be described with reference to FIG. 5. The first louver hook 133 and the second louver hook 134 have the same configuration. The first and second louver hooks 133 and 134 are formed in an arc shape in the width direction, and locking portions 133a and 134a for locking to the first and second hook portions 125 and 126 are formed at the center in the width direction. The locking portion 133a of the first louver hook 133 is directly locked to the first hook portion 125.

[0029] In order to dispose the second louver hook 134 below the first louver hook 133, as shown in FIG. 5, it is locked to the second hook portion 126 via the hanger member 135. The hanger member 135 is configured in a substantially U shape, and a connecting portion 135a for connecting the locking portion 134a of the second louver hook 134 is formed by bending the tip. The upper side 135b of the hanger member 135 is locked to the second hook portion 126. The length from the connecting portion 135a to the upper side 135b of the hanger member 135 can be arbitrarily designed.

[0030] As shown in FIG. 6, the first louver part 131 and the second louver part 132 are in the shape of a cross-sectional arc with the same curvature, and are configured with the same width and the same length. The curvature of the first louver part 131 and the second louver part 132 is configured to be substantially the same as that of the first louver hook 133 and the second louver hook 134. The first louver part 131 and the second louver part 132 are arranged facing each other such that the concave portions of the arcs face each other. Therefore, a hollow portion 130a penetrating in the vertical direction is formed between the first louver part 131 and the second louver part 132.

[0031] The first louver part 131 and the second louver part 132 may be the same, or may be made of different fabrics or different materials. When the first louver part 131 and the second louver part 132 are made of cloth, resin processing may be performed to maintain a cross-sectional arc shape. Further, the first louver part 131 and the second louver part 132 may be configured by winding cloth around a metal member having a cross-sectional arc shape as a core material. In order to maintain the shapes of the first louver part 131 and the second louver part 132, a plurality of frames having a cross-sectional arc shape may be provided at intervals in the longitudinal direction.

[0032] As shown in FIG. 6, the upper ends of the first louver part 131 and the second louver part 132 are configured in a bag shape, and the first louver hook 133 and the second louver hook 134 are respectively inserted and connected into the bag shape. The locking portion 133a of the first louver hook 133 is locked to the first hook portion 125 such that the convex side of the arc shape is disposed on the outside. Further, the second louver hook 134 is locked to the second hook portion 126 via the hanger member 135 such that the convex side of the arc shape is disposed on the outside.

[0033] The first louver part 131 and the second louver part 132 are arranged in a state where both side ends thereof are in contact with each other, and a hollow portion 130a is formed therebetween. The second louver part 132 is disposed below the first louver part 131 by the length of the hanger member 135. Since the first louver part 131 and the second louver part 132 have the same length, the upper part of the first louver part 131 is disposed above the second louver part 132, and an upper ventilation part 136 for ventilating the hollow portion 130a from above the second louver part 132 is formed. Further, the lower part of the second louver part 132 is disposed below the first louver part 131, and a lower ventilation part 137 for ventilating the hollow portion 130a from below the first louver part 131 is formed.

[0034] When the second louver part 132 is arranged on the indoor side, as shown in FIGS. 6(a) and 7, the air in the upper part of the room is taken into the hollow part 130a from the upper ventilation part 136 and ventilated to the window side from the lower ventilation part 137, or the air in the lower part near the window is taken into the hollow part 130a from the lower ventilation part 137 and ventilated into the room from the upper ventilation part 136.

[0035] Also, when the first louver part 131 is arranged on the indoor side, as shown in FIGS. 6(b) and 8, the air in the upper part near the window is taken into the hollow part 130a from the upper ventilation part 136 and ventilated into the room from the lower ventilation part 137, or the air in the lower part of the room is taken into the hollow part 130a from the lower ventilation part 137 and ventilated to the window side from the upper ventilation part 136.

[0036] The configuration of the blind 100 has been described above. Hereinafter, the operation of the blind 100 will be described with reference to FIG. 9. FIG. 9 is a plan view for explaining the operation of the blind 100, where (a) shows the open state of the louvers 130 and (b) shows the closed state of the louvers 130.

[0037] In the state where the louvers 130 are open, as shown in FIG. 9(a), the first louver part 131 and the second louver part 132 are oriented in the longitudinal direction of the head rail 110. Therefore, since a gap is provided between the louvers 130, lighting and ventilation are possible.

[0038] In the state where the louvers 130 are closed, as shown in FIG. 9(b), the first louver part 131 and the second louver part 132 are respectively oriented toward the indoor side and the window side. At this time, in adjacent louvers 130, the end of the first louver part 131 of one louver 130 overlaps with the end of the second louver part 132 of the other louver 130. Therefore, lighting and ventilation from between adjacent louvers 130 are restricted.

[0039] The operation of the blind 100 has been described above. Next, the function of the blind 100 will be described with reference to FIG. 10. FIG. 10 is a schematic diagram showing the function of the blind 100, where (a) shows the state during the day in summer, (b) shows the state at night in summer, (c) shows the state during the day in winter, and (b) shows the state at night in winter.

[0040] First, the function of the blind 100 in summer will be described. During the summer, as shown in FIGS. 10(a) and 10(b), the blind 130 is closed so that the first louver portion 131 faces the indoor side and the second louver portion 132 faces the window side. Then, between the head rail 110 and the louver 130 on the indoor side, it is blocked by the first louver portion 131.

[0041] In the case of daytime, as shown in FIG. 10(a), the cold air from the indoor air conditioner does not flow into the hollow portion 130a of the louver 130 and descends along the surface of the first louver portion 131. There is a lower ventilation portion 137 at the lower part of the first louver portion 131, but the cold air that has descended near the floor surface is heavy and does not rise through the hollow portion 130a from the lower ventilation portion 137. Also, since the second louver portion 132 is arranged near the floor surface and the space between the indoor and the window is blocked by the second louver portion 132, the cold air stays indoors.

[0042] Furthermore, between the window and the second louver portion 132, since the second louver portion 132 is arranged near the floor surface as described above, the air warmed by sunlight through the window rises along the surface of the second louver portion 132 without flowing into the room. There is an upper ventilation portion 136 opening on the window side, but the warmed air does not flow into the hollow portion 130a from the upper ventilation portion 136 and rises. At the upper part, since the head rail 110 and the first louver portion 131 block the window side and the indoor side, the warmed air stays between the window and the louver 130. Therefore, the cooling effect can be improved.

[0043] Also, at night, as shown in Fig. 10(b), the warm air between the window and the louver 130 will stay between the window and the louver 130 as described above. Therefore, the cooling effect is not reduced.

[0044] Next, the winter operation of the blind 100 will be described. In winter, as shown in Figs. 10(c) and (d), the arrangement of the first louver part 131 and the second louver part 132 is reversed between day and night. That is, during the day, as shown in Fig. 10(c), the louver 130 is closed so that the first louver part 131 faces the window side and the second louver part 132 faces the indoor side. Therefore, between the head rail 110 and the louver 130 on the window side is blocked by the first louver part 131.

[0045] Also, at night, as shown in Fig. 10(d), the louver 130 is closed so that the first louver part 131 faces the indoor side and the second louver part 132 faces the window side. Therefore, between the head rail 110 and the louver 130 on the indoor side is blocked by the first louver part 131. Hereinafter, the day and night operations of the louver 130 will be described.

[0046] During the day, as shown in Fig. 10(c), since the first louver part 131 is arranged on the window side and the second louver part 132 is arranged on the indoor side, the warm air between the window heated by sunlight and the first louver part 131 flows into the hollow part 130a through the lower ventilation part 137 below the first louver part 131 and rises. The air that has risen to the upper end of the hollow part 130a flows into the room through the upper ventilation part 136 above the second louver part 132. Therefore, the heating effect in the room can be improved.

[0047] At night, as shown in FIG. 10(d), since the first louver part 131 is arranged on the indoor side and the second louver part 132 is arranged on the window side, a part of the warm air in the room flows into the hollow part 130a through the lower ventilation part 137 below the first louver part 131 and rises. The air that has risen to the upper end of the hollow part 130a flows into the space between the second louver part 132 and the window through the upper ventilation part 136 of the second louver part 132. Therefore, the air between the second louver part 132 and the window is cooled by the outside air but warmed by the warm air flowing in through the upper ventilation part 136, so that the window glass surface is warmed and dew condensation on the window can be prevented.

[0048] (Effect of the First Embodiment) As described above, according to the present embodiment, by forming the lower ventilation part 137 below the first louver part 131 and the upper ventilation part 136 above the second louver part 132, air inflow and exhaust easily occur in the hollow part 130a formed by the pair of the first louver part 131 and the second louver part 132, and the circulation of the air in the room where the blind 100 is installed can be promoted.

[0049] Also, by forming the ventilation parts 136 and 137 at both the upper and lower ends of the louver 130, air flows into the hollow part 130a from one of the ventilation parts 136 and 137 and is exhausted from the other ventilation part 136 and 137, so that the circulation of the air can be activated. In particular, the circulation of the air on the indoor side and the outdoor side separated by the blind 100 can be promoted.

[0050] Further, by directly hanging the first louver part 131 on the first hook part 125 of the carrier hook 124 and hanging the second louver part 132 on the second hook part 126 of the carrier hook 124 via the hanger member 135, the upper ventilation part 136 and the lower ventilation part 137 can be formed. In this way, by simply changing the hanging heights of the pair of the front and rear first louver part 131 and the second louver part 132, the ventilation parts 136 and 137 can be formed on the louver 130.

[0051] In addition, two first louver parts 131 and a second louver part 132 that constitute the louver 130 can be suspended from one carrier 120. Therefore, by rotating the carrier 120, the two first louver parts 131 and the second louver part 132 can be rotated about the shaft part, and the positions of the upper ventilation part 136 and the lower ventilation part 137 can be switched in the front-rear direction.

[0052] In addition, since the first louver part 131 and the second louver part 132 are configured to have a substantially arc-shaped cross section, a substantially cylindrical louver 130 can be easily formed by the two louver parts 131 and 132.

[0053] (Second Embodiment) The configuration of the blind according to the second embodiment will be described with reference to FIGS. 11 and 12. FIG. 11 is a diagram showing the louver 230 of the second embodiment, (a) shows a state in which the second louver part 232 is arranged in the front, and (b) shows a state in which the first louver part 231 is arranged in the front. FIG. 12 is a perspective view showing a state in which the first louver hook 133 and the second louver hook 134 are attached to the carrier hook 124. This embodiment is mainly different from the first embodiment in the configuration of the louver 230, and in this embodiment, the description will be centered on the differences from the first embodiment. For components having substantially the same functional configuration, the same reference numerals will be given to omit redundant description.

[0054] As shown in FIG. 11, the louver 230 has a lower ventilation part 237 formed at the lower part of the first louver part 231 and an upper ventilation part 236 formed at the upper part of the second louver part 232. The lower ventilation part 237 and the upper ventilation part 236 are constituted by mesh parts formed in the first louver part 231 and the second louver part 232. That is, the lower ventilation part 237 formed by the mesh part is formed at the lower part of the first louver part 231, and the upper ventilation part 236 formed by the mesh part is formed at the upper part of the second louver part 232.

[0055] The first louver hook 133 and the second louver hook 134 for connecting the louver 230 of this embodiment can have the same configuration as that of the first embodiment, but the form of locking to the carrier hook 124 is different. That is, as shown in FIG. 12, the first louver hook 133 is directly locked to the first hook portion 125 of the carrier hook 124. The second louver hook 134 is directly locked to the second hook portion 126 of the carrier hook 124. The first louver hook 133 and the second louver hook 134 may be arranged with their both side ends in contact with each other, or may be joined together.

[0056] When the first louver part 231 and the second louver part 232 are attached to the first louver hook 133 and the second louver hook 134 in the same manner as in the first embodiment, the first louver hook 133 and the second louver hook 134 are in a state of abutting via the first louver part 231 and the second louver part 232. At this time, the first louver part 231 and the second louver part 232 attached to the first louver hook 133 and the second louver hook 134 are also in a state where their both side ends are in contact with each other.

[0057] As shown in FIG. 11, the first louver part 231 and the second louver part 232 have the same height at which they are locked to the first louver hook 133 and the second louver hook 134. However, since the lower ventilation part 237 is formed in the lower part of the first louver part 231 and the upper ventilation part 236 is formed in the upper part of the second louver part 232, it has the same action as the louver 130 of the first embodiment.

[0058] (Effect of the second embodiment) As described above, according to this embodiment, since the upper ventilation part 236 and the lower ventilation part 237 are configured by the mesh parts formed in the first louver part 231 and the second louver part 232, the upper ventilation part 236 and the lower ventilation part 237 can be formed in the louver 230 only by processing a part of the first louver part 231 and the second louver part 232.

[0059] (Third embodiment) The configuration of the blind according to the third embodiment will be described with reference to FIG. 13. FIG. 13 is a diagram showing the louver 330 of the third embodiment, where (a) shows a state in which the second louver portion 332 is placed in the front, and (b) shows a state in which the first louver portion 331 is placed in the front. This embodiment is mainly different from the second embodiment in the configuration of the louver 330 and the first and second louver hooks 233 and 234. In this embodiment, the description will be centered on the differences from the first embodiment. For components having substantially the same functional configuration, the same reference numerals will be used to omit redundant description.

[0060] As shown in FIG. 13, the upper ventilation portion 336 and the lower ventilation portion 337 of the louver 330 are not formed of a mesh portion such as the upper ventilation portion 236 and the lower ventilation portion 237 of the louver 230 in the second embodiment, but are composed of a plurality of holes. That is, a lower ventilation portion 337 formed of a plurality of holes is configured below the first louver portion 331, and an upper ventilation portion 336 formed of a plurality of holes is configured above the second louver portion 332. The louver 330 may be made of aluminum, and the holes may be formed by punching to form the lower ventilation portion 337 and the upper ventilation portion 336, and may be formed in a substantially arc-shaped cross section by forming.

[0061] The forms of the first louver hook 233 and the second louver hook 234 for connecting the louver 330 in this embodiment are different from those of the first louver hook 133 and the second louver hook 134 in the second embodiment for connecting to the first louver portion 331 and the second louver portion 332. That is, as shown in FIG. 13, when the first louver portion 331 and the second louver portion 332 are attached to the first louver hook 233 and the second louver hook 234 in the same manner as in the second embodiment, the first louver hook 233 and the second louver hook 234 have a structure in which a pair of louver hook pieces are separated in a bifurcated shape in the vertical direction or the front-rear direction (not shown), and the upper ends of each louver portion can be connected by sandwiching them between the louver hook pieces. Other configurations are the same as those in the second embodiment.

[0062] (Effect of the Third Embodiment) As described above, according to the present embodiment, since the upper ventilation part 336 and the lower ventilation part 337 are constituted by the holes formed in the first louver part 331 and the second louver part 332, the upper ventilation part 336 and the lower ventilation part 337 can be formed in the louver 330 only by processing a part of the first louver part 331 and the second louver part 332.

[0063] (Fourth Embodiment) The configuration of the blind according to the fourth embodiment will be described with reference to FIG. 14. FIG. 14 is a diagram showing the louver 430 of the fourth embodiment, (a) shows a configuration in which a lower ventilation part 437 is provided below the second louver part 432, and (b) shows a configuration in which an upper ventilation part 436 is provided above the second louver part 432. This embodiment is mainly different from the first embodiment in the configuration of the louver 430. In this embodiment, the description will be centered on the differences from the first embodiment. For components having substantially the same functional configuration, the same reference numerals will be given to omit duplicate description.

[0064] When a ventilation part is provided only at one of the upper and lower ends of the louver 430, as shown in FIG. 14, it can be constituted by the first louver part 431 and the second louver part 432 having different lengths. In this embodiment, the length of the second louver part 432 is shorter than that of the first louver part 431.

[0065] When the lower ventilation part 437 is provided below the second louver part 432, as shown in FIG. 14(a), the first louver hook 133 is directly suspended from the first hook part 125, and the second louver hook 134 is directly suspended from the second hook part 126. Since the second louver part 432 is shorter than the first louver part 431, the lower ventilation part 437 is formed below the second louver part 432.

[0066] When the upper ventilation part 436 is provided above the second louver part 432, as shown in Fig. 14(b), the first louver hook 133 is directly suspended from the first hook part 125, and the second louver hook 134 is suspended from the second hook part 126 via the hanger member 135. Since the second louver part 432 is shorter in length than the first louver part 431, the upper ventilation part 436 is formed above the second louver part 432.

[0067] (Effect of the Fourth Embodiment) As described above, according to this embodiment, by making the length of the second louver part 432 shorter than that of the first louver part 431, the lower ventilation part 437 can be formed below the second louver part 432 simply by aligning the positions of the upper ends and suspending them from the carrier hook 124. Further, when the second louver part 432 is suspended from the carrier hook 124 via the hanger member 135, the upper ventilation part 436 can be formed above the second louver part 432. In this way, the upper ventilation part 436 and the lower ventilation part 437 can be formed only by changing the suspension heights of the first louver part 431 and the second louver part 432.

[0068] As mentioned above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings. Needless to say, the present invention is not limited to such examples. It is obvious that those skilled in the art can come up with various modification examples or correction examples within the scope described in the claims, and it is naturally understood that they also belong to the technical scope of the present invention.

[0069] For example, in the above-described first embodiment, the louver 130 is composed of a separate first louver portion 131 and a second louver portion 132. However, the present invention is not limited to this example. A hollow portion (air layer) penetrating in the vertical direction is formed between a pair of front and rear shielding portions, and in at least one of the shielding portions, a ventilation portion for ventilating between the outside and the hollow portion is formed in the vicinity of one end in the vertical direction. The ventilation portion can be arbitrarily designed as long as it faces the other shielding portion. For example, the louver may be configured such that the first louver portion and the second louver portion are integrally formed. Further, a configuration may be adopted in which both side ends of the first louver portion and the second louver portion are joined. The same applies to the second to fourth embodiments.

[0070] Also, in the above embodiment, the ventilation portion is formed by making the hanging heights of the front and rear first louver portions and second louver portions different, or by the hole portions or mesh portions formed in the first louver portion and the second louver portion, or by forming them in the first louver portion and the second louver portion having different lengths. However, the present invention is not limited to this example. For example, the ventilation portion can be formed by forming a hole portion in one shielding portion and a mesh portion in the other shielding portion, or by making the hanging heights of the shielding portions having hole portions or mesh portions different, or by making the hanging heights of the front and rear shielding portions having different lengths different.

[0071] Also, in the above-described first embodiment, the first louver portion 131 and the second louver portion 132 are configured to have a substantially arc-shaped cross section. However, the present invention is not limited to this example. A hollow portion (air layer) penetrating in the vertical direction is formed between a pair of front and rear shielding portions, and in at least one of the shielding portions, a ventilation portion for ventilating between the outside and the hollow portion is formed in the vicinity of one end in the vertical direction. The ventilation portion can be arbitrarily designed as long as it faces the other shielding portion. For example, the first louver portion and the second louver portion may have a substantially trapezoidal or triangular cross section. The same applies to the second to fourth embodiments.

[0072] The embodiments, application examples, modification examples, etc. described above can be implemented in appropriate combinations.

Explanation of Reference Numerals

[0073] 100 blinds 110 head rail (support member) 111 bracket 112 opening / closing cord 113 drive shaft 114 opening / closing operation part 115 rotation operation part 120 carrier 120M master carrier 121 worm 122 worm wheel 123 carrier shaft part 124 carrier hook 125 first hook part 126 second hook part 127 insertion hole 128 spacer link 130, 230, 330, 430 louvers 130a hollow part 131, 231, 331, 431 first louver part (shielding part) 132, 232, 332, 432 second louver part (shielding part) 133, 233 first louver hook 133a locking part 134, 234 second louver hook 134a locking part 135 hanger member 135a connecting part 136, 236, 336, 436 upper ventilation part 137, 237, 337, 437 lower ventilation part

Claims

1. A vertical blind in which louvers are suspended from each of a plurality of carriers arranged at predetermined intervals in the longitudinal direction within a head rail, wherein the louver has a hollow portion formed to penetrate vertically between a pair of front and rear shielding portions formed integrally or separately, and at least one of the shielding portions has a ventilation portion formed in the vicinity of one end in the vertical direction to ventilate between the outside and the hollow portion, and the ventilation portion faces the other shielding portion. Blind characterized by that.

2. The blind according to claim 1, wherein the ventilation portions are respectively formed in the vicinity of the lower end of one of the pair of front and rear shielding portions and in the vicinity of the upper end of the other shielding portion.

3. The blind according to claim 1 or 2, wherein the ventilation portion is formed by the difference in the hanging height of the front and rear shielding portions from the carrier.

4. The blind according to claim 1 or 2, wherein the ventilation portion is formed by a hole portion or a mesh portion formed in the shielding portion.

5. The louver is composed of a first louver portion forming one of the shielding portions and a second louver portion forming the other shielding portion and being separate from the first louver portion, the carrier is provided with a pair of front and rear carrier hook portions rotatable about the shaft portion of the carrier, the first louver portion is suspended from one of the carrier hook portions by a first louver hook provided at the upper end, and the second louver portion is suspended from the other carrier hook portion directly or via a hanger member by a second louver hook provided at the upper end. Blind according to claim 1 or 2, characterized by that.

6. The blind according to claim 5, wherein the first louver hook and the second louver hook suspend the first louver portion and the second louver portion in a state where their side end portions are in contact with or joined to each other.

7. The blind according to claim 5, wherein the first louver portion and the second louver portion are configured to have a substantially arcuate cross section.

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