JP7496987B2 - Roller Screen Equipment - Google Patents

Description

The present invention relates to a roll screen device that can be used for various purposes, and more specifically, to a roll screen device equipped with a guide structure for stably guiding the side ends of a roll screen that is stretched and stored by pulling it horizontally or vertically by winding it up around a winding shaft, without allowing it to slip out of the screen frame.

In a roll screen device for various applications including insect repellent screen doors, a screen with fastener-like anti-slip members attached along both sides in the winding direction is wound up from one end of the winding shaft that rotates in the winding direction of the screen, and a slide bar is fixed to the other end of the screen, and the anti-slip member is configured by attaching a row of engaging members in which multiple engaging members are arranged along the other side of a band-shaped mounting piece that fixes one side to the side end of the screen, and the row of engaging members is slidably engaged with an engaging groove of a guide rail provided in a screen frame that guides the side end of the screen. This is disclosed in Patent Document 1 and has been well known for a long time. The anti-slip members in this well-known roll screen device are usually half of a fastener that is often used in clothing, etc.

In the well-known roll screen device described above, the fastener-like anti-slip member is attached to both ends of the screen attached to the winding shaft in the winding direction, and the engaging elements at the tip end of the fastener-like anti-slip member are larger than the groove width of the guide rail's engaging groove and are slidably engaged and guided inside the engaging groove. Therefore, when the screen is wound up on the winding shaft for storage, the winding diameter of the part where the engaging elements of the anti-slip member at both ends of the screen are wound up on the winding shaft is thicker than the winding diameter of the part where the screen itself is wound up on the winding shaft, resulting in a relatively large difference in the winding diameter between the two. At the same time, the screen is wound up in a state where many of the engaging elements are displaced in the axial direction of the winding shaft, which makes it easy for the screen wound up on the winding shaft to become loose in the winding axial direction or develop complex wrinkles, which can have a negative effect on the smooth installation and winding of the screen, or the tension of the stretched screen, and it is desirable to eliminate this problem.

On the other hand, as a retaining member that corresponds to the fastener-like retaining member along both side edges of the screen in the above-mentioned roll screen device and does not have an engaging element that increases the winding diameter of the above-mentioned screen, Patent Documents 2 and 3, etc. disclose a retaining member that has a strip of synthetic resin or the like that is inserted into slits in the screen frame that guide both side edges along both side edges in the winding direction of the screen and engages with the screen frame, and a locking piece is formed along the tip of the strip that engages with the screen frame in a folded state in order to engage the strip with the screen frame, or various forms similar to this.

The basic structure of the anti-slip members disclosed in the above-mentioned Patent Documents 2 and 3, etc., is a band-shaped body (such as the insertion piece 11 in Patent Document 2) which has one side fixed to both sides of the screen, and a locking piece is provided on the other side of the band-shaped body which is folded back and overlaps with the band to engage with the screen frame. When storing the above-mentioned screen equipped with this anti-slip member, it is necessary to wind up both the band-shaped body and the anti-slip member consisting of the locking piece overlapping it onto the winding shaft. Therefore, if the anti-slip members attached to both sides of the screen can be made thin and flexible, there will be no problems with winding up the anti-slip members when winding up the screen onto the winding shaft. However, as described in detail below, in order to apply a certain degree of tension in the width direction of the screen, the locking pieces in the anti-slip members must have a large resistance to compression in the width direction of the screen. In order to apply this resistance to compression to the locking pieces, not only do the locking pieces need to be made of a material that has the strength against compression and has the necessary cross-sectional area, but they also need to be flexible enough to be easily wound up in the winding direction.

To explain more specifically, the retaining piece that is folded over the band and inserted into the slit of the screen frame in the retaining member has its tip engaged with the edge of the slit inside the screen frame, and the retaining piece itself must have resistance to the tension inherent to the screen to which it is connected via the band, and the tension associated with wind and other external forces acting on the screen, and must have the resistance to the compressive forces caused by these. Therefore, if the retaining piece is easily buckled, bent, or broken by the force acting on the screen from the screen, it will not be able to fulfill its function satisfactorily, and it is necessary for it to have the strength to withstand the compression while having flexibility in the winding direction of the screen. Therefore, it is extremely difficult to adopt a configuration or material that satisfies these conditions for the retaining member including the band and the retaining piece.

JP 2018-105068 A Japanese Utility Model Application Publication No. 59-177699 Japanese Utility Model Application Publication No. 60-004197

The technical objective of the present invention is to provide a roll screen device that, in a roll screen device applicable to various applications, engages a pair of screen frames arranged on both sides of the screen in the winding direction with anti-slip members attached to both ends of the screen in the winding direction to guide the screen, without providing the anti-slip members with engaging elements that significantly change the winding diameter of the screen partially when it is wound onto the winding shaft, as with known fastener-like anti-slip members, thereby preventing the occurrence of complex wrinkles in the screen wound onto the winding shaft and eliminating causes that adversely affect the tension of the screen.

To explain more specifically, we have confirmed that the above-mentioned retaining member is appropriately configured as a number of rigid longitudinal lines arranged in parallel toward the axial direction of the winding shaft, with an attachment piece that fixes one side to the side edge of the screen, and a locking piece that is connected in a folded manner along the other side and has its tip engaged with the edge of the slit in the screen frame, and these longitudinal lines are connected in a bendable manner by flexible lines. Based on this knowledge, we aim to provide a roll screen device that has flexibility in the winding direction of the screen so that it can be easily wound up, while in the width direction of the screen, it has the function of resisting the tension inherent to the screen and the tension associated with wind and other external forces acting on the screen, and of resisting the compressive forces caused by these.

In order to solve the above problem, according to the present invention, a roll screen device is provided in which a screen is wound from one end onto a winding shaft rotatably supported within a winding box, the screen being guided by a pair of screen frames extending in parallel from both ends of the winding box, and a slide bar that can slide freely on the screen frame is attached to the other end of the screen. A stopper member is attached to the screen along both ends in the winding direction, which is guided into a guide groove in the screen frame, and the stopper member is inserted into a slit in the guide groove that opens to the inside of the screen frame, and the stopper member engages with the inner edge of the opening of the slit. In this roll screen device, the stopper members attached to both ends of the screen are connected to a band-shaped mounting piece that fixes one side along the side edge of the screen, and a tip of the mounting piece. The roller blind device is provided with a belt-shaped locking piece with a narrow joint at the end, and each of the mounting piece and locking piece in the retaining member is arranged in parallel toward the axial direction of the winding shaft, and a large number of hard meridian lines that are elastically linear are bendably connected between adjacent meridian lines by flexible lines, so that the parallel meridian lines can be wound up into a cylindrical shape. The retaining member in the screen is engaged with the screen frame by locking the free end of the locking piece to a portion close to the inner edge of the opening of the slit in the screen frame with the joint between the mounting piece and the locking piece inserted into the slit, thereby maintaining the screen in a tensioned state between the screen frames.

In a preferred embodiment of the roller blind device according to the present invention, the slits that engage the anti-slip members of the screen on the inside of the screen frame are provided on the inside of the inner rail housed within the screen frame and are configured to open to the inside of the screen frame.

In a preferred embodiment of the roller screen device according to the present invention, the mounting piece and the locking piece that constitute the retaining member are both formed in a woven fabric by weaving the rigid meridian filaments that constitute them and the flexible filaments that connect the meridian filaments, and at the joint with the locking piece along the tip of the mounting piece, the woven mounting piece and the locking piece are connected by weaving in a manner that they come into surface contact with each other, thereby configuring the locking piece of the retaining member to be oriented in a direction along the mounting piece side.

In the above-mentioned roller screen device according to the present invention, as a preferred embodiment, when the retaining member in the above-mentioned screen is engaged with the screen frame or the inner rail housed within the screen frame, a guide convex surface is provided on the opposing surface of the above-mentioned slit in the guide groove, which contacts the locking piece inserted into the guide groove toward the opposing surface side so as to overlap the mounting piece, thereby pressing the free end side of the locking piece in a direction away from the mounting piece, thereby making it possible to adopt a configuration in which the free end of the locking piece can be held so as to be locked in a portion close to the inner edge of the opening of the above-mentioned slit.

Furthermore, in another preferred embodiment of the roller blind device according to the present invention, an engaging ridge that engages with the free end of the locking piece of the anti-slip member is provided on the inner edge of the opening on the inside of the slit provided in the screen frame or inner rail, thereby ensuring stable engagement of the anti-slip member with the screen frame.

In addition, in a roll screen device provided with the engaging ridges, if a problem occurs with the movement of the screen within the screen frame due to the rotation of the winding shaft, this problem can be solved by disposing V-shaped partial expansion pieces discretely in the longitudinal direction of the anti-slip member between the mounting piece and the locking piece that constitute the anti-slip member at both ends of the screen, which elastically urge the locking piece to open until it does not come into contact with the engaging ridge on the inner edge of the opening of the slit in the guide groove, thereby reducing the sliding resistance between the two.

Furthermore, in another preferred embodiment of the roller screen device according to the present invention, a shaping material is attached to the mounting piece and the locking piece at the mounting end side of the slide bar of the anti-slip member attached to both sides of the screen, so that they can be guided into the guide groove in the screen frame when tensioning begins from the rolled-up state by operating the slide bar, and the shaping material is held by the slide bar guided by the screen frame or the mounting piece held in the slit of the guide groove, so that when tensioning begins, the shaping material guides the mounting piece of the anti-slip member through the slit into the guide groove in the screen frame and guides the locking piece to the inner edge of the opening of the slit in the screen frame.

According to the roll screen device of the present invention described above in detail, in a roll screen device applicable to various uses, when a pair of screen frames arranged on both sides of the screen in the winding direction engage with the anti-slip members attached to both ends of the screen in the winding direction to guide the screen, the problem of complex wrinkles, etc. occurring in the screen is solved by using a known fastener-like anti-slip member, and instead of the known anti-slip member, a mounting piece that fixes one side to the side end of the screen and a locking piece that is connected in a folded manner along the other side and engages the tip with the mouth edge of the slit in the screen frame are arranged in parallel toward the axial direction of the winding shaft, and are connected in a bendable manner by flexible wires between a large number of hard meridian lines, so that the screen has flexibility in the winding direction so that it can be easily wound up, while in the width direction of the screen, it has the function of resisting the compression force caused by the tension originally applied to the screen and the tension caused by wind and other external forces acting on the screen, thereby making it possible to apply a stable tension to the screen between the screen frames.

1 is a partially cutaway front view showing a schematic overview of a first embodiment of a roller screen device according to the present invention; FIG. 2 is a partially cutaway cross-sectional side view showing an overview of the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 10 is a partially enlarged explanatory diagram showing an example of the configuration of the material of the mounting pieces and locking pieces that constitute the anti-slip members attached along both side ends in the winding direction of the screen in the present invention. FIG. This is an enlarged cross-sectional view of the main part of the above-mentioned first embodiment, showing the state in which a shaping material is attached to the attachment end side of the anti-slip member to the slide bar of the screen, and a partial expansion piece is attached in the longitudinal direction of the anti-slip member. 6 is a cross-sectional view taken along the line BB in FIG. 5. 6 is a cross-sectional view taken along the line CC in FIG. 5. 6A is a perspective view of the former shown in FIG. 5, and FIG. 6B is a perspective view of a partial expansion piece shown in FIG. 5. FIG. 7 is a cross-sectional view showing a modified example in which the inner surface of the screen frame itself in the first embodiment has an inner rail configuration, taken at a position corresponding to FIG. 6 . This is a cross-sectional view at a position equivalent to the B-B section in Figure 5, showing the relationship between the anti-slip member used in the second embodiment of the present invention and the screen frame that adjusts its posture or the guide convex surface on the inner bottom of the inner rail within the screen frame.

The roll screen device of the present invention can be used not only to improve insect protection, sun protection, light blocking, privacy, dust protection, and airtightness of building openings, but also to install screens suitable for various purposes, such as for opening and closing doors of cupboards for storing food, food serving carts, etc. The basic structure, as shown in the first embodiment in Figures 1 to 3, is that a screen 5 is wound from one end of a winding shaft 2 rotatably supported within a winding box 1 and guided by a pair of screen frames 3 extending in parallel from both ends of the winding box 1, and a slide bar 4 is attached to the other end of the screen 5 to be guided by the pair of screen frames 3, so that the screen 5 can be moved and held between a stored state where it is wound around the winding shaft 2 and a stretched state where it is stretched between the screen frames 3.

The winding shaft 2, which is rotatably supported on the bearing 1a in the winding box 1 of the roll screen device, has an operating cord 8 wound around a sprocket 7 attached to one end of the winding shaft 2, and the screen 5 is unrolled or wound by operating the operating cord 8. However, the rotation of the winding shaft 2 is not limited to the above configuration, and various other known configurations can be used. The screen 5, which is operated by the rotational drive of the winding shaft 2, is guided along the guide groove 9 on the inside of the screen frame 3, so the slide bar 4 attached to the end of the screen 5 needs to be configured so that both ends are guided along a part of the screen frame 3, etc.

In addition, in Figures 1 to 3, the above-mentioned roll screen device is shown as a roll screen device in which both ends of the screen 5 are guided by a pair of screen frames 3 extending downward from both ends of the winding box 1 formed by an upper horizontal frame, and the screen 5 is stretched and stored by vertical pulling from the winding shaft 2. However, the present invention described below can also be applied to a horizontally pulling roll screen device in which the screen 5 is stretched and stored by horizontal pulling by winding the screen on a winding shaft supported rotatably within the vertical frame that constitutes the winding box.

To explain the configuration of the roll screen device according to the present invention in detail, first, as shown in Figs. 3 to 6, the screen 5 is fitted with a retaining member 10 for guiding the screen 5 into the guide groove 9 on the inside of the pair of screen frames 3 along both ends in the winding direction around the winding shaft 2. As shown in Fig. 6, the retaining member is equipped with a strip-shaped mounting piece 11 that is fixed along both ends of the screen 5 by welding, gluing, or the like, and a strip-shaped locking piece 12 that is joined at a narrow joint 13 with a connecting end aligned with the tip 11a of the mounting piece 11. The strip-shaped locking piece 12 that is joined to the mounting piece 11 can be cut so that their cut ends are aligned at the joint 13 as shown in Fig. 6, but as will be clear from what will be described later, this is not the only option.

Next, the materials constituting the mounting piece 11 and the locking piece 12 of the retaining member 10 will be described.
4, the material constituting the mounting piece 11 and the locking piece 12 in the retaining member 10 is a number of parallel hard meridian filaments 15, which are bendably connected between the meridian filaments 15 by soft flexible filaments 16, thereby maintaining the spaces between the meridian filaments 15 flexibly. More specifically, the meridian filaments 15 are made of a hard synthetic resin or a similar linear material that elastically maintains its linearity, and adjacent parallel meridian filaments 15 are connected by flexible filaments 16 made of delicate chemical fibers or the like. In both the mounting piece 11 and the locking piece 12, the parallel meridian filaments 15 are formed so that their axes are oriented in the width direction of the screen 5 wound around the winding shaft 2, and when the screen is wound up into a cylindrical shape, the parallel meridian filaments 15 can be easily wound up around the winding shaft 2.

In addition, the woven material formed by the hard meridian filaments 15 and the soft flexible filaments 16 is shown in Figure 4 as a simple plain weave of both filaments, but the weaving of the meridian filaments 15 and the flexible filaments 16 does not necessarily have to be plain weaving, as long as the parallel meridian filaments 15 can be wound up together with the screen 5 in a blind shape, and flexible filaments 16 may be appropriately woven between the meridian filaments 15, etc., and such weaving can be easily performed using various known weaving techniques without the need to show specific examples here. In addition, the materials constituting the mounting piece 11 and the locking piece 12 do not necessarily have to be the same, and materials of different types can be selectively used. Furthermore, the woven material to be woven as the warp filaments 15 can have its elastic linearity adjusted by utilizing the hardening properties of raw yarns such as polyester or polypropylene, or by applying a hardening agent to chemical fibers of a polymer compound and then heating and drying the fibers, adjusting the thickness of the fiber atoms, or by using raw yarns with a core-sheath structure as the warp filaments 15.

The attachment piece 11 and the locking piece 12 in the above-mentioned slip-out prevention member 10 are joined at a narrow joint 13 formed by joining the connecting end of the locking piece 12 to the tip 11a of the attachment piece 11, as shown in Figure 6, by weaving or knitting the rigid meridian filaments 15 of the attachment piece 11 and the locking piece 12 with the flexible filaments 16 that connect the meridian filaments to form an integrated textile. This configuration is intended to allow the numerous rigid meridian filaments 15, whose elastic linearity is maintained at the free end 12a of the locking piece 12, to be arranged as parallel as possible to the attachment piece 11, and to elastically maintain that shape.

As described above, if the mounting piece 11 and the locking piece 12 constituting the retaining member 10 are connected in a manner that makes surface contact with each other at the joint 13, the meridian strips 15 of the locking piece 12 of the retaining member 10 can be held as oriented as possible toward the width direction of the screen 5 at the mounting piece 11. This position of the locking piece 12 is very suitable for the locking piece 12 to resist the tension in the screen width direction that is originally applied to the screen 5, and the compressive force acting on the locking piece 12 due to the tension associated with wind or other external forces acting on the screen, and to exhibit strength that can withstand bending, breakage, etc.

In other words, the orientation of the locking piece 12 causes the meridian filaments 15 in the locking piece 12 to face substantially in the direction of the compressive force acting on the locking piece 12 through the screen 5, so that the meridian filaments 15 do not easily buckle, deform, bend, or break due to the force, and since many of the meridian filaments 15 in the locking piece 12 are arranged within the locking piece 12, they effectively withstand the compressive force.

The engagement of the retaining member 10 with the screen frame 3 is achieved by inserting the mounting piece 11, which is provided with a number of rigid meridian lines 15 that are elastically linear, into the slit 14 of the guide groove 9 in the inner rail 6 disposed inside the screen frame 3, and then, in a stabilized position, engaging the free end 12a of the locking piece 12 that overlaps the mounting piece 11 with a portion of the screen frame 3 adjacent to the inner edge 14a of the opening of the slit 14, thereby maintaining both side ends of the screen 5 in a tensioned state between the pair of screen frames 3.

In the screen frame 3 of the first embodiment, the inner rail 6 is housed therein, and a guide groove 9 is provided within the inner rail to engage the retaining member 10. However, as in the modified screen frame 23 shown in FIG. 9, a guide groove 25 similar to the inner surface of the inner rail 6 can be formed on the inner surface of the screen frame 23 itself, and the guide groove 25 can be opened to the inside of the screen frame 23 by a slit 24.

A configuration using an inner rail 6 separate from the screen frame 3, as in the screen frame 3 of the first embodiment, is suitable for adopting for purposes such as forming the inner rail 6 from a synthetic resin material or the like that has excellent sliding properties with the retaining member 10, smoothing the movement of the retaining member 10 that engages and slides in the guide groove 9 inside the inner rail 6, or reducing manufacturing costs by standardizing the retaining member 10 and the corresponding inner rail 6 used in multiple types of screen devices, and therefore whether or not to adopt the inner rail 6 can be selected appropriately.

In addition, when engaging the free end 12a of the locking piece 12 of the above-mentioned retaining member 10 with a portion adjacent to the opening inner edge 14a of the above-mentioned slit 14, as shown in FIG. 6, it is effective to provide an engaging ridge 14b on the opening inner edge 14a of the slit 14 and engage the free end 12a of the locking piece 12 with its back side in order to stably engage the retaining member 10 with the screen frame 3.

However, as described above, the mounting piece 11 and the locking piece 12 constituting the anti-slip member 10 are connected in a manner in which they come into surface contact with each other at the joint 13, thereby orienting the locking piece 12 of the anti-slip member 10 in a direction along the mounting piece 11, that is, orienting the hard meridian strip 15 within the locking piece 12 in the direction of a compressive force acting on the locking piece 12 via the mounting piece 11 due to an external force acting on the screen 5, thereby preventing the meridian strip 15 from easily buckling, deforming, bending or breaking. However, the presence of the engaging ridge 14b holds the free end 12a of the locking piece 12 in a position spaced apart from the surface of the mounting piece 11, which reduces the effect obtained by bringing the locking piece 12 into surface contact with the mounting piece 11 at the joint 13, and therefore is not necessarily an appropriate configuration. To avoid reducing the effect of this action, it is desirable to make the engaging protrusion 14b small so that the position where the free end 12a of the locking piece 12 engages is as close as possible to the mounting piece 11.

Instead of providing the above-mentioned engaging ridge 14b, for example, when weaving the joint 13 between the mounting piece 11 and the locking piece 12, a ridge that adjusts the gap between the two meridian lines 15 can be sandwiched between the mounting piece 11 and the locking piece 12 on the slit 14 side of the guide groove 9 at the joint 13, so that the free end 12a of the meridian line 15 of the locking piece 12 is kept in a stable, rising state with a slight inclination relative to the meridian line 15 of the mounting piece 11. This allows the free end 12a of the locking piece 12 to be locked to the inner edge 14a of the opening of the slit 14 without providing the above-mentioned problematic engaging ridge 14b.

Furthermore, it is desirable to make it possible for the retaining member 10, in which the mounting piece 11 and the locking piece 12 are superimposed, to be insertable through the slit 14 into the guide groove 9 in the screen frame 3 (or the guide groove 25 of the screen frame 23 in FIG. 9) in order to facilitate the assembly and maintenance of the screen device. In this case, the width of the slit 14 is made as close as possible to the thickness of the retaining member 10, while allowing the insertion of the retaining member 10, in which the mounting piece 11 and the locking piece 12 are superimposed. Furthermore, in order to assemble and detach the retaining member 10 through the slit 14 to the screen frame 3, it is desirable that when the retaining member 10 is inserted to the innermost end of the guide groove 9, the free end 12a of the locking piece 12 is in a position that exceeds the tip of the engaging protrusion 14b.

As described above, the retaining member 10 is formed in a woven fabric with the locking piece 12 integrated with the mounting piece 11 at the joint 13, and the free end 12a of the locking piece 12 is kept as parallel as possible to the mounting piece 11, and this shape is elastically maintained by the meridian strips 15. When the retaining member 10 is moved along the guide groove 9 of the screen frame 3 by the rotational drive of the winding shaft 2, the tip side of the locking piece 12 of the retaining member 10 on both sides of the screen 5 receives a sliding resistance due to contact with the engaging ridge 14b of the opening inner edge 14a of the slit 14, and this sliding resistance acts on the retaining member 10 over the entire length of the screen 5 being unwound from the winding shaft 2.

The sliding resistance against the screen 5 can be ignored if the overall length of the screen 5 in the winding direction is not very long, but if the overall length of the screen 5 is long, it is required to reduce it. To reduce the sliding resistance, as shown in Figures 5 and 8 (b), partial expansion pieces 17 that urge the locking piece 12 to open elastically until it does not contact the engaging protrusion 14b of the opening inner edge 14a of the slit in the guide groove 9 are discretely arranged in the longitudinal direction of both sides of the locking member 10 between the mounting piece 11 and the locking piece 12 of the locking member 10. When the overall length of the screen 5 is not long, it is of course sufficient to provide a single partial expansion piece 17 in the middle of the screen in the longitudinal direction.

This partial expansion piece 17 is made of an elastic thin plate of metal or synthetic resin and has a V-shape as shown in Figure 8 (b) and a short width that does not interfere with winding onto the winding shaft 2, and can be fixed by adhesive or the like to the outside of the mounting piece 11 and the locking piece 12 at the side end of the screen as shown in Figure 5, in a manner similar to the manner in which the shaping material 18 described later is fixed to the outside of the mounting piece 11 and the locking piece 12 in Figure 7.
The piece 17a of the partial expansion piece 17 fixed to the mounting piece 11 has a length that is not inserted into the slit 14 of the mounting piece 11 or that is inserted to some extent, and can be fixed to the mounting piece 11 by adhesive or the like, so that it is held in an unstable but almost fixed state. The piece 17b of the partial expansion piece 17 fixed to the locking piece 12 can adjust the sliding resistance caused by contact between the locking piece 12 and the engaging ridge 14b, etc., by changing the length that it extends toward the screen 5.

When the partial expansion pieces 17 as described above are arranged discretely in the longitudinal direction of the anti-slip member 10, a gap will be formed between the above-mentioned engaging piece 12 and the engaging ridge 14b at the attachment position of the partial expansion piece 17 on the anti-slip member 10, resulting in a portion where no sliding resistance acts on the engaging piece 12, and a certain degree of sliding resistance may remain in the intermediate portion between the two attachment positions of the partial expansion piece 17. However, the sliding resistance in that intermediate portion can be reduced to an appropriate level by adjusting the spacing between the attachment positions of the partial expansion pieces 17, etc.
It goes without saying that the reduction in sliding resistance by the partial expansion pieces 17 described above can be applied not only to the first embodiment using the inner rail 6, but also to the modified example in which the inner rail is integrated with the screen frame 23 as shown in Fig. 9. Moreover, the elasticity imparted to the partial expansion pieces 17 must be within a range that does not impede smooth winding of the screen 5 when it is being wound up.

In addition, in the above-mentioned roll screen device, when assembling the retaining members 10 on both sides of the screen 5 wound around the winding shaft 2 to the pair of screen frames 3, it is necessary to insert the mounting pieces 11 and the locking pieces 12 of the retaining members 10 attached to both sides of the screen 5 into appropriate positions in the guide grooves 9 in the inner rails 6 in the screen frame 3, which has a cross section as shown in FIG. 7. Of course, the assembly of the retaining members 10 to the screen frame 3 can be applied not only to the first embodiment using the inner rails 6, but also to the case where the mounting pieces 11 and the locking pieces 12 of the retaining members 10 on both sides of the screen 5 are inserted into the guide grooves 25 provided in the screen frame 23 in FIG. 9.

To explain this in more detail, in order to assemble the retaining member 10 to the screen frame 3, as shown in Figures 5 and 7, the retaining member 10, in which the mounting piece 11 and the locking piece 12 are overlappingly joined at the joint 13, must be placed in a retaining position in which the mounting piece 11 holds the side edge of the screen 5 within the slit 14 by engaging the free end 12a of the locking piece 12 with the inner edge 14a of the opening of the slit 14 in the guide groove 9, or with the back side of the engaging ridge 14b provided there, with the mounting piece 11 facing the slit 14 of the guide groove 9.

In this way, when the anti-slip members 10 attached to both ends of the screen 5 are held against a pair of screen frames 3, the screen 5 is held in a tensioned state between the pair of screen frames 3. The task of putting the anti-slip members 10 into this anti-slip position can be performed very easily by following the procedure described below with reference to Figures 5, 7, and 8(a).

In other words, in order to assemble the retaining members 10 at both ends of the screen 5 wound around the winding shaft 2 between the pair of screen frames 3, as can be seen from Figures 5 and 7 above, it is first necessary to connect, by adhesive or the like, a shaping member 18 having a V-shaped cross section and the aforementioned retaining posture to the longitudinal end of the retaining member 10 located at the attachment end of the screen 5 to the slide bar 4, as shown in Figure 8(a).

The shaping member 18 is formed in a V-shape with a piece 18a that connects to the edge of the mounting piece 11 of the retaining member 10 and a piece 18b that connects to the edge of the locking piece 12 of the retaining member 10. The piece 18a that connects the mounting piece 11 at the V-shaped edge faces the slit 14 in the guide groove 9 in the screen frame 3, and the piece 18b that connects the locking piece 12 at the edge faces the part where the free end 12a of the locking piece 12 faces the inner edge 14a of the opening of the slit 14 in the guide groove 9 in the screen frame 9 from the joint 13 between the mounting piece 11 and the locking piece 12 in the guide groove 9 in the screen frame 3, and must be held by the slide bar 4.

The shaping material 18 can be held on the slide bar 4 by extending the piece 18a of the shaping material 18 that is fixed to the mounting piece 11 to the slide bar 4, or it can be held in a substantially fixed state, albeit unstable, by being held on the mounting piece 11 that is fixed by adhesive or the like. In either case, however, the shaping material 18 must be short because if it extends to the range where it is wound around the winding shaft 2 when the screen 5 is wound up, it will interfere with the winding of the screen 5, and therefore the shaping material 18 does not need to have elasticity. In addition, the piece 18b of the shaping material 18 that is fixed to the locking piece 12 can adjust the sliding resistance caused by contact with the engaging protrusion 14b, etc., depending on the length by which it extends to the slide bar 4 side.

The shaping material 18 is basically attached to the longitudinal end of the retaining member 10 as described above, prior to the introduction of the retaining member 10 into the screen frame 3, but the shaping material 18 may be introduced into the guide groove 9 in the screen frame 3 when tensioning of the screen 5 starts from a fully wound state on the winding shaft 2, or the tip of the shaping material 18 may already be introduced into the guide groove 9 when tensioning of the screen 5 starts.

Figure 10 shows a second embodiment in which a screen frame 33 of substantially the same type as that of the roller screen device of the first embodiment is provided, and an inner rail 6a of the same type as the inner rail 6 of the first embodiment is provided within the screen frame 33. To explain this second embodiment in more detail, the inner rail 6a has a guide groove 19a inside it that includes a slit 14 and an engaging protrusion 14b suitable for use with a retaining member 20 as described below, and the guide protrusion 19b is provided on the opposing surface 19a of the slit 14 in the guide groove 19, which abuts against the locking piece 12 of the retaining member 20 inserted in the guide groove, thereby separating the free end 12a of the locking piece 12 from the mounting piece 11 and pressing it against the back side of the engaging protrusion 14b.

The retaining member 20 used in this second embodiment, like the first embodiment described above, is equipped with a belt-shaped mounting piece 11 that fixes one side along the side edge of the screen 5, and a belt-shaped locking piece 12 whose connecting end is joined to the tip of the mounting piece with a narrow joint 13. Each of the mounting piece 11 and locking piece 12 in the retaining member 20 is also formed so that the numerous parallel meridian lines 15 can be rolled up into a cylindrical shape by connecting the meridian lines 15 in a bendable manner with flexible lines 16, like the first embodiment.

According to this second embodiment, when the retaining member 20 attached to the screen 5 is engaged with the inner rail 6a in the screen frame 33, the guide convex surface 19b installed on the opposing surface 19a of the slit in the guide groove 19 abuts against the locking piece 12 inserted on top of the mounting piece 11, and presses the free end side of the locking piece 12 in a direction away from the mounting piece 11, so that the free end of the locking piece can be held so as to be locked in a portion close to the inner edge of the opening of the slit, thereby making it possible to omit the use of the partial expansion piece 17 as described with reference to Figures 5 and 8(b).

REFERENCE SIGNS LIST 1 Winding box 2 Winding shaft 3 Screen frame 4 Slide bar 5 Screen 9 Guide groove 10, 20 Anti-slip member 11 Mounting piece 11a Tip 12 Locking piece 12a Free end 13 Joint 14 Slit 14a Opening inner edge 14b Engagement convex strip 15 Longitudinal strip 16 Flexible strip 17 Partially expanding piece 18 Shaping material

Claims (7)

A roll screen device in which a screen is wound from one end onto a winding shaft rotatably supported within a winding box, the screen being guided by a pair of screen frames extending in parallel from both ends of the winding box, and a slide bar is attached to the other end of the screen so as to be slidable on the screen frames, and a stopper member is attached to the screen along both ends in the winding direction so as to be guided into a guide groove in the screen frame, the stopper member is inserted into a slit in the guide groove that opens to the inside of the screen frame, and the stopper member engages with the opening inner edge of the slit,
The retaining members attached to both side ends of the screen include a belt-shaped mounting piece that fixes one side along the side end of the screen, and a belt-shaped locking piece whose connecting end is joined to the tip of the mounting piece with a narrow width,
The attachment pieces and the locking pieces of the retaining member are arranged in parallel in the axial direction of the winding shaft, and the numerous rigid meridian filaments that are elastically linear are bent so that adjacent meridian filaments are bent and connected by flexible filaments, so that the numerous parallel meridian filaments can be wound into a cylindrical shape.
The engagement of the retaining member in the above-mentioned screen with the screen frame is achieved by engaging the free end of the locking piece with a portion of the screen frame adjacent to the inner edge of the opening of the slit when the joint between the mounting piece and the locking piece is inserted into the slit, thereby maintaining the screen in a tensioned state between the screen frames.
A roller blind device comprising: The roller blind device according to claim 1,
The slits for engaging the retaining members for the screen on the inside of the screen frame are provided on the inside of an inner rail housed in the screen frame and open to the inside of the screen frame.
A roller blind device. The roller blind device according to claim 1 or 2,
The mounting piece and the locking piece constituting the retaining member are both formed in a woven fabric by knitting and weaving hard meridian strips constituting them and flexible strips connecting the meridian strips,
At the joint between the attachment piece and the locking piece along the tip of the attachment piece, the woven attachment piece and the locking piece are connected by weaving in a manner that they are in surface contact with each other, thereby configuring the locking piece of the slip-out prevention member to face in a direction along the attachment piece side.
A roller blind device. The roller blind device according to claim 3,
When the retaining member of the screen is engaged with the screen frame or the inner rail housed within the screen frame,
A guide convex surface is provided on the surface of the guide groove facing the slit, for contacting a locking piece inserted into the guide groove toward the opposing surface side so as to overlap the mounting piece and for pressing the free end side of the locking piece in a direction away from the mounting piece, thereby enabling the free end of the locking piece to be held so as to be locked in a portion adjacent to the inner edge of the opening of the slit.
A roller blind device. In the roller blind device according to any one of claims 1 to 4,
An engaging protrusion is provided on the inner edge of the opening of the inner slit provided in the screen frame or the inner rail, with which the free end of the locking piece of the retaining member engages.
A roller blind device. The roller blind device according to claim 5,
Between the mounting pieces and the locking pieces constituting the retaining member at both side ends of the screen, V-shaped partial expansion pieces are discretely arranged in the longitudinal direction of the retaining member, which are biased elastically to open until the locking pieces do not come into contact with the engaging ridges on the inner edges of the openings of the slits in the guide grooves, thereby reducing the sliding resistance between them.
A roller blind device comprising: In the roller blind device according to any one of claims 3 to 6,
A shaping material is attached to the mounting piece and the locking piece at the mounting end side of the anti-slip member attached to both side ends of the screen so that they can be guided into the guide groove in the screen frame when tensioning begins from the rolled-up state by operating the slide bar, and the shaping material is held by the slide bar guided by the screen frame or the mounting piece held in the slit of the guide groove, so that when tensioning begins, the shaping material has the function of guiding the mounting piece of the anti-slip member through the slit into the guide groove in the screen frame and guiding the locking piece to the inner edge of the opening of the slit in the screen frame.
A roller blind device comprising:

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