Shield structure

Abstract

To provide technology capable of shielding a gap between a shield device and an opposite part without damaging appearance of the shield device.SOLUTION: A gap shield part 5 shielding a gap G between a lower end of a shield device and an opposite part F positioned below the shield device is provided with: a holder 54 arranged in a space formed in a weight bar 4 placed at the lower end of the shield device to be retractable from the weight bar 4; a magnetic body 56 positioned above a fixed magnetic body 6 which the opposite part F has to be capable of attaching the fixed magnetic body 6 with magnetic; and an elastic body 52 arranged in the space to energize the holder 54 such that the holder 54 is received in the space, wherein the holder 54 has the magnetic body 56 to shield the gap G through projection from the weight bar 4 with attachment force generated between the fixed magnetic body 6 and the magnetic body 56 against energized force of the elastic body 52 when the weight bar 4 come close to the opposite part F.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] This embodiment relates to a shielding structure that shields a gap between a shielding device and an opposing portion such as a frame or a floor surface. [Background technology]

[0002] A conventional technology for shielding a gap between the bottom end of a shading device and an opposing portion, such as a window sill or floor, below the shading device is disclosed in Patent Document 1. The blind disclosed in this document is equipped with a shading member that hangs down from the bottom rail in a retractable manner along the entire longitudinal length of the bottom rail. When the blind is lowered to its lowest position, the bottom rail descends with the slats tilted approximately vertically and abuts against the window sill, which is the opposing portion. At this time, the shading member abuts against the window sill and retracts into the bottom rail. After retraction, when the slats are rotated horizontally, the bottom rail is slightly raised by the lift cord, creating a gap between the bottom rail and the window sill. However, because the shading member is exposed from the bottom rail and abuts against the window sill, it blocks the gap and prevents light from leaking through the gap. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication number 3-28720 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with this technique, the light blocking member always hangs down from the bottom rail and is exposed, which impairs the design of the shading device.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a technology that can shield the gap between a shading device and an opposing part without compromising the design of the shading device. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, one aspect of the present invention is a shielding structure that shields a gap between the lower end of a shielding device and an opposing part located below the shielding device, and includes: a protruding and retracting part that is located within a space formed in a bar member provided at the lower end of the shielding device and is capable of protruding and retracting from the bar member; a second magnetic body that is located above a first magnetic body that the opposing part has and is capable of being magnetically attracted to the first magnetic body; and a biasing part that is located within the space and biases the protruding and retracting part so that the protruding and retracting part is accommodated within the space, and the protruding and retracting part has the second magnetic body, and when the bar member approaches the opposing part, an attractive force generated between the first and second magnetic bodies against the biasing force of the biasing part causes the protruding and retracting part to protrude from the bar member and shield the gap. [Effects of the Invention]

[0007] According to the present invention, a technique can be provided that can shield the gap between a shading device and an opposing portion without impairing the design of the shading device. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view showing the configuration of a roller blind according to a first embodiment. [Figure 2] 3A and 3B are diagrams for explaining a weight bar and a gap shielding portion according to the first embodiment. [Figure 3] FIG. 2 is a perspective view showing a gap shield according to the first embodiment. [Figure 4] 5A and 5B are schematic vertical cross-sectional views showing the operation of the gap shielding unit according to the first embodiment. [Figure 5] 10A and 10B are diagrams for explaining a weight bar and a gap shielding portion according to a second embodiment. [Figure 6]10A and 10B are diagrams illustrating a weight bar and a gap shielding portion according to a third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a roller blind equipped with a liftable screen as a shielding material will be described as an example. In the following description, the surface facing the room when the roller blind is installed will be referred to as the front, the surface facing the room outside as the back, the direction consisting of the front and back as the front-to-back direction, and the width direction of the roller blind as the left-to-right direction. In addition, in this specification and drawings, components having substantially the same functions will be assigned the same reference numerals, and redundant description will be omitted.

[0010] First Embodiment (Overall composition) The overall configuration of a roller blind according to the first embodiment will be described. Fig. 1 is a front view showing the configuration of the roller blind according to this embodiment. Fig. 1 shows the state in which the weight bar 4 of the roller blind 1 is lowered to its lowest position and is closest to the opposing part F, which may be the bottom frame of a window or the floor.

[0011] As shown in Fig. 1, the roller blind 1 according to this embodiment comprises a set frame 2, two side brackets 21, a winding pipe 22, an operating chain 24, a screen 3, a weight bar 4, and a gap shielding part 5. In Fig. 1, the gap shielding part 5 is shown in a protruding state, which will be described later.

[0012] The set frame 2 is formed long in the left-right direction, supports the take-up pipe 22 via two side brackets 21, and is fixed to a window frame, a wall, etc. by two mounting brackets 23. The two side brackets 21 are provided at both ends of the set frame 2 in the longitudinal direction, respectively, and support the take-up pipe 22 so that it can rotate.

[0013] The take-up pipe 22 is formed in a long cylindrical shape, and two bearings are provided at both ends in the longitudinal direction. The take-up pipe 22 is rotatably supported by two side brackets 21 via the two bearings so that its rotation axis faces the left and right directions. The operation chain 24 is a looped, roughly string-like member that is wound around a pulley that rotates the take-up pipe 22 and hangs down below the set frame 2.

[0014] The screen 3 is a thin-film member formed in a long rectangular shape, and one end in the vertical direction is connected over substantially the entire area to the winding pipe 22, and the other end in the vertical direction is connected over substantially the entire area to the weight bar 4. The weight bar 4 is a member formed to be longer than the width of the screen 3, and applies tension to the screen 3 by being connected to the lower end of the screen 3.

[0015] (Configuration of weight bar 4 and gap shielding part 5) The configuration of the weight bar 4 and the gap shielding part 5 according to the first embodiment will be described. Fig. 2 is a diagram for explaining the weight bar and the gap shielding part according to this embodiment. Fig. 3 is a perspective view showing the gap shielding part according to this embodiment. Note that Fig. 2(a) shows a cross-sectional view equivalent to the line AA in Fig. 1 in which the gap shielding part 5 is in a housed state, and Fig. 2(b) shows a cross-sectional view of the line AA in Fig. 1 in which the gap shielding part 5 is in a protruding state.

[0016] 2, the weight bar 4 is generally rectangular in side view, specifically, is longer in the up-down direction than in the front-to-rear direction, and is formed as a long, generally rectangular tube with multiple internal spaces. Both longitudinal ends of the weight bar 4 are open so that the multiple internal spaces communicate with the outside, and are closed by caps 41 (see FIG. 1).

[0017] The weight bar 4 has an upper groove 42 and a lower groove 43 formed at its upper and lower parts, respectively, which extend across the entire width in the left-right direction and are recessed inward in the up-down direction. The upper groove 42, located at the top, has a hook-shaped locking portion 421 formed on its rear edge so as to protrude upward. The formation of the locking portion 421 allows the upper groove 42 and the locking portion 421 to define a locking space that opens forward. The lower end of the screen 3 is fixed to one surface of the mounting plate 31 by staples or the like. When this fixed portion is positioned within the locking space, the mounting plate 31 is inclined, and its upper end is hooked on the inner wall of the folded portion formed on the forward side of the locking portion 421. With the mounting plate 31 positioned within the locking space and hooked on the locking portion 421 in this way, the weight bar 4 is non-detachably connected to the screen 3.

[0018] The lower groove 43 located below is formed wider in the front-to-rear direction than the upper groove 42 so as to define a storage space S in which the gap shielding part 5 is stored, and is configured with an opening 431 that connects the storage space S to the outside of the weight bar 4. When the gap shielding part 5 is stored in the storage space S, as shown in FIG. 2(a), the gap shielding part 5 is buried in the storage space S and cannot be seen at least from the front of the roller blind 1. On the other hand, the gap shielding part 5 can be in a protruding state in which it protrudes to the outside from this opening 431, as shown in FIG. 2(b). In other words, the gap shielding part 5 is configured to be able to appear and disappear from the opening 431.

[0019] As shown in FIGS. 2 and 3, the gap shielding part 5 includes an elastic body 52, a holder 54, a magnetic body 56, and a buffer member 58.

[0020] The elastic body 52 is provided so as to extend in the vertical direction, and its upper end is fixed by fixing means such as adhesive or screws to the bottom surface of the lower groove portion 43, in other words, to the upper inner wall surface connected to the upper ends of the front inner wall surface and the rear inner wall surface that form the lower groove portion 43. Meanwhile, the lower end of the elastic body 52 is fixed to the holder 54 by fixing means. For example, an extension spring (coil spring) can be used as such elastic body 52. ​​When an extension spring is used, one extension spring may be provided for each holder 54, specifically, one at a position approximately in the center of the holder 54 in the left-right direction, or multiple extension springs may be provided side by side in the left-right direction for each holder 54. The elastic body 52 pulls the magnetic body 56 upward via the holder 54, in other words, biases the holder 54 so that the holder 54 is always submerged in the accommodation space S.

[0021] The holder 54 is a rectangular tube extending a predetermined length in the left-right direction, and has an opening on its lower surface, forming a roughly U-shaped configuration in a side view. The holder 54 holds the magnetic body 56, with the underside of the magnetic body 56 exposed through the opening, in a state where it cannot fall off, using, for example, an adhesive. Specifically, the holder 54 holds the magnetic body 56 so that it covers the front, top, and back surfaces, making the magnetic body 56 invisible at least from the front. As described above, the elastic body 52 is fixed to the upper surface of the holder 54, and the magnetic body 56 is supported so as to be suspended by the elastic body 52 via the holder 54. Note that the predetermined length here is preferably slightly shorter than the left-right length of the weight bar 4, and is preferably approximately the same length.

[0022] Ribs 432 protruding toward each other are provided at approximately the center of the depth direction (vertical direction) on the front and rear inner wall surfaces of the lower groove portion 43, i.e., on the front and rear inner wall surfaces that define the storage space S. As described above, the elastic body 52 constantly pulls the holder 54 upward by its elastic force, biasing the gap shielding unit 5 into the storage state. However, as shown in FIG. 2( a), the upper surface of the holder 54 abuts against the ribs 432, thereby restricting further upward movement of the holder 54, i.e., preventing the holder 54 from sinking into the storage space S by more than a predetermined amount. The predetermined amount is preferably set to a value that at least makes the holder 54 and the magnetic body 56 invisible from the front of the roller blind 1, and that allows an attractive force to be generated between the magnetic body 56 and the fixed magnetic body 6 when the weight bar 4, described in detail below, is lowered to its lowest position. By forming the rib 432 at a vertical position set at such a value, the holder 54 and the magnetic body 56 can be positioned so that they are not visible from the front and the above-mentioned attractive force is effectively generated.

[0023] The magnetic body 56 is a rectangular prism-shaped magnetic material extending in the left-right direction. In this embodiment, as shown in FIG. 1 , three magnetic bodies 56 are provided within the holder 54, specifically, one near each of the left-right ends and one approximately in the left-right center. These three magnetic bodies 56 preferably have the same configuration and are spaced the same distance apart from one another to prevent bias in the left-right direction and enable well-balanced movement of the gap shielding part 5 through the opening 431. Directly below the magnetic body 56, a fixed magnetic body 6 is provided, which has approximately the same left-right length as the holder 54, preferably slightly longer. The fixed magnetic body 6 is a plate-shaped magnetic material that is pre-installed in the facing part F, and is configured to be magnetically attracted to the fixed magnetic body 6. Alternatively, the fixed magnetic body 6 may have approximately the same left-right length as the magnetic body 56 and be provided three times so as to face the three magnetic bodies 56.

[0024] As such magnetic bodies, it is preferable to use ferromagnetic bodies that generate a strong magnetic attraction between them. Specifically, for example, if the magnetic body 56 includes a hard magnetic body such as a permanent magnet, the fixed magnetic body 6 may be a metal plate or alloy plate that also includes a hard magnetic body, or a soft magnetic body such as iron, nickel, or cobalt. On the other hand, for example, if the fixed magnetic body 6 includes a hard magnetic body, the magnetic body 56 may also include a hard magnetic body or a soft magnetic body. In any case, the magnetic body 56 and the fixed magnetic body 6 may have any configuration as long as they can be attracted to each other by magnetic force.

[0025] In this embodiment, the fixed magnetic body 6 is disposed directly below the magnetic body 56. Therefore, when the weight bar 4 of the roller blind 1 is positioned at its lowest end, the magnetic body 56 and the fixed magnetic body 6 are brought into close proximity, as shown in FIG. 2(b). This proximity generates a magnetic attraction force between the magnetic body 56 and the fixed magnetic body 6, and the holder 54 and the magnetic body 56, which are suspended by the elastic body 52, are pulled downward and drawn out. As a result of this drawing, the holder 54 and the magnetic body 56 protrude from the opening 431, allowing the gap shielding portion 5 to protrude. It is desirable that the attraction force between the magnetic body 56 and the fixed magnetic body 6 be stronger than the elastic force of the elastic body 52 when the weight bar 4 is positioned at its lowest end. Therefore, to achieve the above-described phenomenon, it is preferable to appropriately select the magnetic powder and dispersed material used in each magnetic body, the material of the elastic body 52, and the like, and set the desired attraction force and elastic force.

[0026] The cushioning member 58 is formed in a sheet shape and is uniformly provided on the underside of the magnetic body 56. The cushioning member 58 prevents direct contact between the magnetic body 56 and the fixed magnetic body 6, thereby reducing damage to the two and the generation of contact noise. The cushioning member 58 may be made of any material that can achieve the above-mentioned effect, such as a resin-based material such as urethane foam or polystyrene foam, or a fiber-based material such as felt. Since the underside of the magnetic body 56 is covered with the cushioning member 58, it is not visible from below except on the side, even when, for example, the weight bar 4 of the roller blind 1 is positioned above it.

[0027] (Operation of gap shielding unit 5) The operation of the gap shielding unit 5 will be described in detail below with reference to the drawings. Figure 4 is a schematic vertical cross-sectional view showing the operation of the gap shielding unit according to this embodiment.

[0028] 4(a), first, one side of the circular operating chain 24 is pulled, causing the winding pipe 22 to rotate in the direction of unwinding the screen 3, and the screen 3 is unwound from the winding pipe 22, causing the weight bar 4 to descend. In this state, as described above, the elastic force of the elastic body 52 causes the magnetic body 56 and the buffer member 58 to be buried in the storage space S via the holder 54, and the gap shielding unit 5 is maintained in a stored state. Therefore, a user of the roller blind 1 will not be able to see the gap shielding unit 5 from the front.

[0029] As the operating chain 24 continues to be pulled and the weight bar 4 is lowered to its lowest position, the gap shielding portion 5 and the fixed magnetic body 6 approach each other. This approach causes a magnetic attractive force to be generated between the magnetic body 56 and the fixed magnetic body 6. As this approach continues and this attractive force becomes greater than the elastic force (biasing force) of the elastic body 52, the magnetic body 56 is pulled downward. As a result, the elastic body 52 stretches and the holder 54, magnetic body 56, and buffer member 58 are pulled downward. In other words, the holder 54 and other components are pulled downward by the attractive force against the elastic force of the elastic body 52. ​​When this pulling occurs, as shown in FIG. 4( b), the gap shielding portion 5 protrudes, and the magnetic body 56 and the fixed magnetic body 6 come into contact with each other via the buffer member 58 and are magnetically attracted to each other. This restricts the pulling, and the user sees only the front of the holder 54 protruding from the weight bar 4.

[0030] Therefore, when the weight bar 4 of the roller blind 1 is positioned in the lowest position, the gap shielding portion 5 protrudes, and the gap G defined between it and the opposing portion F is closed by the gap shielding portion 5 (see FIG. 1), making it possible to block light entering from outside through the gap G, for example. It is preferable that the holder 54 be made of the same color as the material forming the outer casing of the weight bar 4, and preferably made of the same material. This allows the user to recognize the weight bar 4 and holder 54 as a single unit, and a high level of design can be maintained even when the gap shielding portion 5 is in the protruding state.

[0031] Meanwhile, by pulling the other side of the circular operating chain 24, the take-up pipe 22 rotates in the direction of taking up the screen 3, and the screen 3 is taken up by the take-up pipe 22, causing the weight bar 4 to rise. At this time, in the initial stage of the rise, the magnetic attraction force (attraction force) between the magnetic body 56 and the fixed magnetic body 6 is greater than the elastic force of the elastic body 52, and as the weight bar 4 rises, the elastic body 52 stretches, as shown in Figure 4(c).

[0032] As the operating chain 24 continues to be pulled and the weight bar 4 rises further, the elastic force increases along with the increased elongation of the elastic body 52. ​​When the weight bar 4 rises to the point where the elastic force exceeds the attractive force, the magnetic attraction between the magnetic body 56 and the fixed magnetic body 6 is released, and the holder 54, magnetic body 56, and buffer member 58 are pulled upward by the elastic body 52 and buried within the storage space S, so that the gap shielding part 5 returns to the stored state, as shown in Figure 4(d).

[0033] According to the present embodiment described above, the gap shielding portion 5, which can shield the gap G when the weight bar 4 is in its lowest position, can be stored in a state other than when the weight bar 4 is in close proximity to the opposing portion F. Therefore, the gap shielding portion 5 does not protrude from the weight bar 4 at all times, and the design of the roller blind 1 is not impaired. Furthermore, when the gap shielding portion 5 protrudes, the magnetic body 56 and the fixed magnetic body 6 are magnetically attracted to each other. This prevents the roller blind 1 from being excessively blown by wind, even if an opening such as a window that the roller blind 1 is covering is opened and wind flows into the room. Furthermore, because the gap shielding portion 5 can be provided within the lower groove portion 43 of the weight bar 4, there is no need to particularly enlarge the weight bar 4, for example, to incorporate a device for lifting the holder 54 upward.

[0034] In this embodiment, the magnetic body 56 has been described as having a rectangular prism shape, but this is not limiting. The magnetic body 56 may be cylindrical or spherical, and its shape is not critical, as long as it can be magnetically attracted to the fixed magnetic body 6. If the magnetic body 56 is cylindrical or spherical, its outer periphery may be covered by the buffer member 58. In this case, the holder 54 may be removed, and the other end of the elastic body 52 may be connected to the buffer member 58, and the buffer member 58 may be extended in the left-right direction to have approximately the same length as the weight bar 4, so that the buffer member 58 closes the gap G.

[0035] Furthermore, if a part of the opposing portion F includes a magnetic material that can generate an attractive force between it and the magnetic material 56, or is formed of such a magnetic material, it goes without saying that there is no need to provide a separate fixed magnetic material 6 in the opposing portion F.

[0036] In addition, in this embodiment, it has been described that a plurality of magnetic bodies 56 are provided on the holder 54, but only one may be provided, and in that case, it is preferable that the magnetic body 56 is positioned approximately in the center in the left-right direction of the holder 54. The single magnetic body 56 may extend in the left-right direction to the same extent as the holder 54.

[0037] In addition, in this embodiment, the rib 432 is provided to prevent the holder 54 and the like from being buried by the elastic body 52 to a predetermined extent or more, but the present invention is not limited to this. If an attractive force is generated between the magnetic body 56 that is most buried in the accommodation space S by the elastic body 52 and the fixed magnetic body 6, the rib 432 may not be provided.

[0038] Furthermore, in this embodiment, the stored state of the gap shielding part 5 has been described as a state in which the holder 54 and the like are buried in the storage space S, but the buffer member 58 alone, or the buffer member 58 and the holder 54, may protrude slightly downward from the opening 431 (for example, by a few mm to a few cm), and the design is not impaired if the protrusion is slight. In other words, the expressions "stored state" and "appearing" can also include such slight exposure.

[0039] Furthermore, if the left-right length of the magnetic body 56 is approximately the same as that of the weight bar 4, the holder 54 may be eliminated and the other end of the elastic body 52 may be fixed directly to the upper surface thereof. In this case, when the gap shielding part 5 is in the protruding state, the magnetic body 56 will be exposed from the front, but in the stored state it will be buried in the storage space S without any problems, so it is possible to avoid a loss of design when the roller blind 1 is raised or lowered. In this case, the magnetic body 56 may be painted the same color as the weight bar 4.

[0040] Furthermore, the shielding structure according to the present invention may be composed of, for example, the gap shielding portion 5, or may be composed of the weight bar 4 and the gap shielding portion 5.

[0041] <Second embodiment> Fig. 5 is a diagram for explaining the weight bar and gap shield according to the embodiment. Note that Fig. 5(a) shows a vertical cross-sectional view in which the gap shield 5A is in a retracted state, and Fig. 5(b) shows a vertical cross-sectional view in which the gap shield 5A is in a protruding state.

[0042] As shown in Figure 5(a), the roller blind according to this embodiment differs from the roller blind according to the first embodiment in that it includes a weight bar 4A that is generally cylindrical in side view instead of the weight bar 4, and a gap shielding portion 5A instead of the gap shielding portion 5. The weight bar 4A has an upper space portion 42A and a lower space portion 43A that define spaces that are generally rectangular in side view instead of the upper groove portion 42 and the lower groove portion 43, respectively, making it possible to reuse an existing weight bar. In other words, the upper space portion 42A has an opening at the top, and the mounting plate 31 hooks onto the inner surface of the edge of the opening, connecting the screen 3 and the weight bar 4.

[0043] The gap shield 5A in this embodiment is configured to be attachable to such an existing weight bar 4A without impairing its effectiveness. Specifically, the gap shield 5A differs from the gap shield 5 according to the first embodiment in that it includes an elastic body 52A instead of the elastic body 52 and a holder 54A instead of the holder 54.

[0044] Elastic body 52A differs from elastic body 52 according to the first embodiment in that one end of elastic body 52A fits along the upper side wall surface and part of the rear side wall surface of lower space 43A, and the other end is folded back toward the front and connected to holder 54A via screws or the like. Elastic body 52A may have a left-right length that is approximately the same as the left-right length of holder 54A, or may have one shorter leaf spring, specifically one located approximately in the center of holder 54A in the left-right direction, or multiple shorter leaf springs arranged side by side in the left-right direction.

[0045] The holder 54A differs from the holder 54 according to the first embodiment in that it has a bifurcated portion 541 extending downward from the connection surface with the elastic body 52A and bifurcating in the front-rear direction, with the magnetic body 56 held between the bifurcated portion 541. The lower ends of the bifurcated portion 541 are bent away from each other and abut against the edge of the opening of the lower space 43A in the housed state. The edge of the opening serves the function of the rib 432 according to the first embodiment, that is, it prevents the holder 54 and the like from sinking to a predetermined depth or more in the housed state. Furthermore, a pair of extensions 541A are formed extending downward from the respective ends bent away from each other. A buffer member 58 is housed between the pair of extensions 541A. The lower ends of the pair of extensions 541A protrude downward beyond the buffer member 58, and a storage portion 541B having a space capable of housing the fixed magnetic body 6 is formed between the lower ends and below the buffer member 58.

[0046] According to the present embodiment described above, the gap shielding part 5A can be incorporated into an existing weight bar such as the weight bar 4A that has a space below, thereby achieving the same effect as the gap shielding part 5. That is, the gap shielding part 5A can be shifted between a housed state as shown in FIG. 5(a) and a protruding state as shown in FIG. 5(b), thereby reliably closing the gap G without compromising the design. Furthermore, when the magnetic body 56 is magnetically attracted to the fixed magnetic body 6 in the protruding state, the fixed magnetic body 6 can be housed in the housing part 541B, and the lower end of the extension part 541A can be brought into contact with the facing part F. Therefore, the fixed magnetic body 6 is no longer exposed between the holder 54A and the facing part F, and the gap G can be completely sealed.

[0047] In this embodiment, in the stored state, the holder 54A and the buffer member 58 are slightly exposed and protrude from the opening of the lower space 43A, so that they are visible to the user, but the amount of protrusion is so small that it does not excessively impair the design.

[0048] <Third embodiment> Fig. 6 is a diagram for explaining the weight bar and gap shield according to the embodiment. Note that Fig. 6(a) shows a vertical cross-sectional view in which the gap shield 5B is in a retracted state, and Fig. 6(b) shows a vertical cross-sectional view in which the gap shield 5B is in a protruding state.

[0049] As shown in Figure 6(a), the roller blind according to this embodiment differs from the roller blind 1 according to the first embodiment in that it has a weight bar 4B instead of the weight bar 4, and a gap shielding portion 5B instead of the gap shielding portion 5. The weight bar 4B differs from the weight bar 4 according to the first embodiment in that it has a lower groove portion 43B in which an upper rib 433 and a lower rib 434 are newly formed.

[0050] The upper rib 433 and the lower rib 434, like the rib 432, are provided on the front and rear sidewalls that define the accommodation space S of the lower groove portion 43B, respectively, and protrude in directions approaching each other. The upper rib 433 is located above the rib 432, and supports the biasing magnetic body 52B, described in detail below, by sandwiching it between the upper rib 433 and the rib 432 from above and below, preventing relative movement in the vertical direction. The lower rib 434 is formed as the edge of the opening 431 of the lower groove portion 43B, and is engageable with an engaging rib 542, described in detail below.

[0051] Gap shielding part 5B differs from gap shielding part 5 according to the first embodiment in that it includes biasing magnetic body 52B instead of elastic body 52 and holder 54B instead of holder 54. Biasing magnetic body 52B is a plate-shaped magnetic material that can be magnetically attracted to magnetic body 56, and when gap shielding part 5B is in the accommodated state, it can generate an attractive force between magnetic body 56 and gap shielding part 5B. As a result, as shown in FIG. 6(a), magnetic body 56 can be pulled upward, that is, biased upward, so that holder 54B and buffer member 58 are embedded in accommodation space S via magnetic body 56.

[0052] On the other hand, the attractive force between the biasing magnetic body 52B and the magnetic body 56 is weaker than the attractive force generated between the magnetic body 56 and the fixed magnetic body 6 when the weight bar 4B is in proximity to the opposing portion F. Therefore, as shown in Figure 6(b), when the weight bar 4B is located at the lowest end, the magnetic body 56 can resist the attractive force between the biasing magnetic body 52B and be magnetically attracted to the fixed magnetic body 6 via the buffer member 58, and the gap shielding portion 5B can transition to a protruding state.

[0053] The biasing magnetic body 52B may extend across the entire width in the left-right direction, as with the lower groove portion 43B, or may be provided only above the magnetic body 56. The biasing magnetic body 52B is preferably a ferromagnetic body that generates an attractive force between itself and the magnetic body 56. Specifically, for example, if the magnetic body 56 includes a hard magnetic body such as a permanent magnet, the biasing magnetic body 52B may be a metal or alloy plate that also includes a hard magnetic body or a soft magnetic body such as iron, nickel, or cobalt. On the other hand, for example, if the biasing magnetic body 52B includes a hard magnetic body, the magnetic body 56 may also include a hard magnetic body or a soft magnetic body. In any case, the biasing magnetic body 52B may have any configuration as long as it can be attracted to the magnetic body 56 by magnetic force. However, it is desirable to select a magnetic powder, a dispersed material, a metal material, or the like so that the attractive force is at least lower than that of the fixed magnetic body 6.

[0054] The holder 54B has engagement ribs 542 formed on both front-rear end portions at its upper end. The engagement ribs 542 extend in the left-right direction and protrude away from each other. When the weight bar 4B is pulled upward after the gap shielding portion 5B is in the protruding state, the underside of the engagement rib 542 comes into contact with the upper surface of the lower rib 434 and engages with it, allowing the holder 54B to be pulled upward together with the weight bar 4B and disengaging the magnetic attraction between the magnetic body 56 and the fixed magnetic body 6. The holder 54B is formed so that gaps corresponding to the protruding portions of the ribs can be defined between its front side wall and the front inner wall of the lower groove 43B, and between its rear side wall and the rear inner wall of the lower groove 43B, so that the engagement ribs 542 can be provided.

[0055] According to the present embodiment described above, even if the biasing magnetic body 52B is used instead of the elastic body, it is possible to achieve the same effect as that of the gap shielding part 5. In other words, the gap shielding part 5B can be shifted between the housed state shown in Fig. 6(a) and the protruding state shown in Fig. 6(b), and it is possible to reliably close the gap G without impairing the design.

[0056] The engaging rib 542 and the lower rib 434 may be provided on the weight bar 4 and the gap shielding portion 5 according to the first embodiment. By providing these, it becomes possible to significantly reduce the stretching of the elastic body 52 in response to the upward movement of the weight bar 4, that is, the load on the elastic body 52.

[0057] In the first to third embodiments, the present invention has been described as being applied to a roller blind equipped with a screen, but the present invention is not limited to this and can be applied to any shading device equipped with a shielding body that shields an opening such as a window, etc. Examples of such shading devices include electric or manual horizontal blinds, pleated screens, honeycomb screens, shutters, and room partition devices.

[0058] The present invention can be embodied in various other forms without departing from the spirit or main characteristics thereof. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. The scope of the present invention is defined by the claims and is not limited to the text of the specification. Furthermore, all modifications, improvements, substitutions, and alterations within the scope of the claims are within the scope of the present invention. [Explanation of symbols]

[0059] 1 Roller screen (shading device) 4, 4A, 4B Weight bar (bar component) 432 Rib (burial control part) 5 Gap shielding section (shielding structure) 52, 52A Elastic body (biasing part) 52B biasing magnetic body (biasing portion, third magnetic body) 54, 54A, 54B Holder (protruding part) 542 Engagement rib (release portion) 56 Magnetic body (emerging part, second magnetic body) 58 Cushioning material 6 Fixed magnetic body (first magnetic body) F Opposite part G Gap

Claims

1. A shielding structure that shields a gap between a lower end of a shielding device and an opposing portion located below the shielding device, a recessed portion provided in a space formed in a bar member provided at a lower end of the shielding device and capable of protruding and retracting from the bar member; a second magnetic body located above the first magnetic body of the facing portion and capable of being magnetically attracted to the first magnetic body; a biasing portion that is provided in the space and biases the recessed portion so that the recessed portion is accommodated in the space; Equipped with The recessed portion has the second magnetic body, and when the bar member approaches the facing portion, the recessed portion protrudes from the bar member and shields the gap due to an attractive force generated between the first and second magnetic bodies against the biasing force of the biasing portion. Shielding structure.

2. At least one of the first and second magnetic bodies includes a hard magnetic body, and the other includes a hard magnetic body or a soft magnetic body. The shielding structure according to claim 1.

3. The biasing portion is an elastic body. The shielding structure according to claim 1.

4. the biasing portion is a third magnetic body that can be magnetically attracted to the second magnetic body, The biasing force of the biasing portion is an attractive force generated between the second and third magnetic bodies, and is weaker than the attractive force generated between the first and second magnetic bodies when the bar member approaches the opposing portion. The shielding structure according to claim 1.

5. The recessed portion has a holder that holds the second magnetic body so as to cover at least the wall surface of the second magnetic body. The shielding structure according to claim 1.

6. A buffer member is provided on the lower surface of the second magnetic body to prevent contact between the second magnetic body and the first magnetic body. The shielding structure according to claim 1.

7. a sinking prevention portion that is provided in the space and prevents the protruding portion from sinking into the space by more than a predetermined amount due to the biasing portion; The shielding structure of claim 1 further comprising:

8. the biasing portion is provided between an upper side wall surface that defines a part of the space and the recessed portion, The burial prevention portion is formed as a rib provided on at least one of a front side wall surface and a rear side wall surface that define a part of the space and protruding toward the other wall surface. The shielding structure according to claim 7.

9. a release portion that releases the magnetic attraction between the first and second magnetic bodies by engaging with the retracted portion in response to upward movement of the bar member; The shielding structure according to any one of claims 1 to 8, further comprising:

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