Roll assembly and screen device

Abstract

To provide a roll assembly and a screen device that can wind up a screen without the side edges of the screen being displaced in the axial direction.SOLUTION: A roll assembly includes a shaft 31 and an opening / closing body 50 that is wound onto the shaft 31 in a manner to be reeled out. A first guide component 60 and a second guide component 70 are attached to the ends of the shaft 31. The opening / closing body 50 has a net 51 which is a screen, and a fastener element 522 which is a slip-off prevention part that is provided on the side edge of the net 51 along the feeding direction and thicker than the net 51. Each guide part 60, 70 has small diameter parts 63, 722 with a diameter smaller than the diameter of the shaft 31. The base end of the net 51 in the feeding direction is fixed to the shaft 31, and the base end of the fastener element 522 in the feeding direction is fixed to the small diameter parts 63, 722.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a roll assembly and a screen device including the roll assembly. [Background technology]

[0002] BACKGROUND ART Conventionally, a retractable insect screen door is known in which an insect net is configured to be freely unwound and retracted from a retracting shaft (see Patent Document 1). This insect screen door comprises a winding box with the winding shaft built in, a pair of screen guides extending from both ends of the winding box, and small engaging protrusions attached to the left and right side edges of the insect net.The small engaging protrusions are movable along the screen guides and are engaged with the inner edges of slits provided in the screen guides in a non-detachable state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 2-122890 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the retractable insect screen door described in Patent Document 1, when the base end of the insect net is attached and fixed to the winding shaft with double-sided tape or the like, a step is created between the small engaging protrusions and the insect net, resulting in parts of the insect net not being in close contact with the double-sided tape, causing unevenness in the way the insect net is attached to the winding shaft, making the ends of the insect net prone to shifting, and making it prone to shifting when retracted. This problem occurs not only when an insect net is wound around a winding shaft, but also when a sheet-like screen such as a light-shielding screen is wound around a winding shaft.

[0005] An object of the present invention is to provide a roll assembly and a screen device that can wind up a screen without causing the side edges of the screen to become misaligned in the axial direction. [Means for solving the problem]

[0006] The roll assembly of the present invention is a roll assembly comprising a shaft and an opening / closing body that can be wound up onto the shaft so as to be reeled out, wherein a guide part is attached to at least one end of the shaft, the opening / closing body has a screen and a retaining part that is provided on a side edge along the payout direction of the screen and has a thickness dimension greater than that of the screen, the guide part has a small diameter part that is smaller in diameter than the diameter of the shaft, the base end of the screen in the payout direction is fixed to the shaft, and the base end of the retaining part in the payout direction is fixed to the small diameter part.

[0007] The screen device of the present invention comprises the roll assembly and a guide rail that guides the screen in the unwinding direction, and is characterized in that the guide rail has a guide groove formed therein that allows the anti-slip portion to move along the longitudinal direction of the guide rail and to be prevented from slipping out in a direction perpendicular to the longitudinal direction. [Effects of the Invention]

[0008] According to the present invention, a guide component is attached to at least one end of the shaft, and this guide component has a small-diameter portion that is smaller than the diameter of the shaft, so that the base end of the screen of the opening-closing body can be tightly fixed to the shaft, and the base end of the retaining portion can be tightly fixed to the small-diameter portion. This prevents the base end of the opening-closing body from being loosely fixed to the shaft or guide component at a location that is not tightly fixed, prevents the side edges of the screen from shifting in the axial direction, and suppresses misalignment when the screen is wound up. [Brief explanation of the drawings]

[0009] [Figure 1]FIG. 1 is an exploded perspective view showing a screen unit according to a first embodiment. [Figure 2] 1A and 1B are diagrams showing an opening / closing body of a first embodiment, in which (A) is a top view and (B) is a front view. [Figure 3] FIG. 2 is an exploded perspective view showing the winding shaft of the first embodiment. [Figure 4] FIG. 2 is a front view showing the roll assembly of the first embodiment. [Figure 5] FIG. 4 is a front view showing another example of the roll assembly of the first embodiment. [Figure 6] FIG. 10 is a front view showing a roll assembly according to a second embodiment. [Figure 7] FIG. 10 is a front view showing a roll assembly according to a third embodiment. [Figure 8] FIG. 10 is an exploded perspective view showing a winding shaft of a fourth embodiment. [Figure 9] FIG. 10 is a front view showing a roll assembly according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] [First embodiment] A first embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows a roll screen door 1 as a screen device equipped with a roll assembly according to the first embodiment. The roll screen door 1 is a lift-up roll screen door that is placed on the indoor side of a window fixed to an opening in the exterior wall of a building. The roll screen door 1 includes a case 10 and guide rail 20 that are fixed to the window frame, a winding shaft 30 that is placed within the case 10, and an opening / closing body 50 that is wound up and retractable around the winding shaft 30.

[0011] The case 10 is configured to include a case body 11, a case cover 12, a pulley box 13, and a case cap 14. The case body 11 is engaged and fixed to an upper attachment fixed to the upper frame of the window frame. The pulley box 13 has a pulley and a winding shaft gear built in, and is configured so that when the pulley is rotated by manually operating a ball chain 15 attached to the pulley, the winding shaft gear meshing with the internal gear of the pulley rotates. The pulley box 13 is fixed to one end of the case body 11 by a tapping screw 16 . The case cap 14 is fixed to the other end of the case body 11 by a tapping screw 16 . The case cover 12 is rotatably placed on a support portion 111 having an arc-shaped cross section provided on the front edge of the case body 11, and is rotatably attached to the pulley box 13 and the case cap 14 with tapping screws 17.

[0012] The guide rail 20 guides the left and right edges of the opening / closing body 50, and its upper end is fitted and fixed to the pulley box 13 and the case cap 14. The opening at the lower end of the guide rail 20 is closed by a cap 21. The guide rail 20 is also fixed to the window frame with double-sided tape 22 attached to its backside. A guide groove 25 is formed in the guide rail 20 so as to extend continuously in the longitudinal direction. The guide groove 25 is formed on the surfaces of the pair of guide rails 20 that face each other.

[0013] The winding shaft 30 is configured to include a shaft 31, a first guide component 60, and a second guide component 70. The winding shaft 30 will be described in detail later.

[0014] As shown in Figure 2, the opening / closing body 50 is composed of a net 51 which is a screen, vertical guide fasteners 52 attached to both left and right ends which are the side edges along the unwinding direction of the net 51, and horizontal guide fasteners 53 attached to the lower end which is the leading edge of the net 51 in the unwinding direction. The net 51 is made of a general insect net in which warp threads and weft threads are crossed in a lattice pattern and the crossings are fused together. The vertical guide fastener 52 has a configuration similar to that of a fastener used for clothing, etc., and includes a fastener tape 521 and fastener elements 522 fixed along the edge of the fastener tape 521. The fastener tape 521 is made of a polyester tape woven into a tape shape, and is connected to the side edge of the net 51 by welding or the like. The fastener element 522 is a resin element (teeth) such as a coil fastener, and is used as a retaining portion having a thickness greater than that of the fastener tape 521 or the net 51. The horizontal guide fastener 53 has the same configuration as the vertical guide fastener 52 and is composed of a fastener tape 531 and a fastener element 532 .

[0015] As shown in FIG. 1, a guide 55, a bottom bar 56, left and right caps 57, and an AT material 58 are attached to the lower end of the opening / closing body 50. The guide 55 has a guide groove into which the fastener element 532 of the horizontal guide fastener 53 is inserted, and is attached to the horizontal guide fastener 53 by sliding it from the end of the horizontal guide fastener 53 to engage the guide groove with the fastener element 532. The bottom bar 56 has a groove into which the guide 55 is inserted, and is attached to the guide 55 by inserting the guide 55 into this groove. The caps 57 are inserted into the hollow portion of the bottom bar 56 to close the left and right small edges of the bottom bar 56. The AT material 58 is slidably inserted into a holding groove formed on the lower surface of the bottom bar 56 .

[0016] [Winding shaft] As shown in FIG. 3, the shaft 31 of the winding spindle 30 is formed in a substantially cylindrical shape, and has a plurality of engaging grooves 311 formed continuously along the axial direction on the inner peripheral surface. The first guide part 60 is a part attached to the end of the shaft 31 on the pulley box 13 side, and as shown in Figures 3 and 4, is a one-piece molded part made of synthetic resin and includes an insertion part 61 to be inserted into the shaft 31, a large diameter part 62 with the same diameter as the shaft 31, a small diameter part 63 with a diameter smaller than the diameter of the shaft 31, and a disk part 64 with a diameter larger than the shaft 31. A take-up shaft gear protruding from the pulley box 13 is fitted into the first guide component 60. In addition, a protrusion 611 that engages with the engagement groove 311 of the shaft 31 is formed on the outer circumferential surface of the insertion portion 61. By engaging the protrusion 611 with the engagement groove 311, the take-up shaft gear, the first guide component 60, and the shaft 31 rotate integrally.

[0017] The large diameter portion 62 abuts against and closes the small end of the shaft 31. The large diameter portion 62 is formed in a cylindrical shape with the same diameter as the shaft 31, so that the outer circumferential surface of the large diameter portion 62 and the outer circumferential surface of the shaft 31 are provided continuously without any steps. The small diameter portion 63 is formed in a cylindrical shape with a smaller diameter than the large diameter portion 62. Therefore, a circumferentially continuous recess 631 is formed between the large diameter portion 62 and the disk portion 64. In other words, the recess 631 is a groove-like recess with the outer peripheral surface of the small diameter portion 63 as its bottom surface and the large diameter portion 62 and the disk portion 64 as its side surfaces.

[0018] The second guide part 70 is a part attached to the end of the shaft 31 on the case cap 14 side, and is composed of three parts: an insertion part 71 that is inserted into the shaft 31, an abutment part 72, and a disk part 73. The insert part 71 includes an insert portion 711 that is inserted into the shaft 31, a flange portion 712 that abuts against the edge of the shaft 31, and a male thread portion 713 that extends axially from the flange portion 712. A protrusion portion 714 that engages with the engagement groove 311 of the shaft 31 is formed on the outer circumferential surface of the insert part 711. By engaging the protrusion portion 714 with the engagement groove 311, the insert part 71 and the shaft 31 rotate together. The flange portion 712 has the same diameter as the shaft 31.

[0019] The abutting part 72 includes a large diameter part 721, a small diameter part 722, and an internally threaded part 723. The large diameter part 721 is a cylindrical part having the same diameter as the shaft 31. The small diameter part 722 is a cylindrical part having a smaller diameter than the shaft 31 and the same diameter as the small diameter part 63. In this embodiment, the abutting part 72 is disposed in a first orientation in which the large diameter part 721 is located on the insertion part 71 side and the small diameter part 722 is located on the disk part 73 side. Therefore, the outer circumferential surfaces of the large diameter part 721 and the flange part 712 and the outer circumferential surface of the shaft 31 are continuously provided without any steps. Since small diameter portion 722 has a smaller diameter than large diameter portion 721, similar to small diameter portion 63, a circumferentially continuous recess 724 is formed between large diameter portion 721 and disk portion 731, similar to recess 631. The female thread portion 723 is formed so as to penetrate the abutting part 72 in the axial direction, and is configured so that the male thread portion 713 can be screwed onto it.

[0020] Here, when the diameter of the large diameter portion 62, 721 is R1 and the diameter of the small diameter portion 63, 722 is R2, the step dimension D of the recessed portion 631, 724 is D = (R1 - R2) / 2. When the thickness dimension of the fastener element 522 of the vertical guide fastener 52 is S, this step dimension D satisfies S / 2 ≦ D ≦ S. For example, the thickness dimension S of the fastener element 522 is 1.0 mm, and the step dimension D is 0.5 mm. In addition, the axial thickness dimension of the small diameter portions 63, 722 is equal to or greater than the width dimension of the fastener element 522. Therefore, as shown in FIG.

[0021] The disk part 73 includes a disk portion 731 having a diameter larger than that of the shaft 31 , a shaft portion 732 rotatably supported by the case cap 14 , and a female screw portion 733 . The female thread portion 733 is formed so as to penetrate the disk part 73 in the axial direction, and is configured so that the male thread portion 713 can be screwed onto it. For this reason, the second guide part 70 is integrated by screwing the female threaded portion 723 of the abutting part 72 into the male threaded portion 713 of the insertion part 71, and screwing the female threaded portion 733 of the disk part 73 into the male threaded portion 713 protruding from the abutting part 72.

[0022] The base end of the opening / closing body 50, i.e., the upper ends of the net 51 and the vertical guide fastener 52, are adhered and fixed to the winding shaft 30 with double-sided tape 32. The double-sided tape 32 is attached along the axial direction of the shaft 31 from the small diameter portion 63 of the first guide component 60 to the small diameter portion 722 of the second guide component 70. Therefore, at the base end of the opening-closing body 50, the net 51 and the fastener tape 521 of the vertical guide fastener 52 are closely adhered to the double-sided tape 32 adhered to the shaft 31, the large diameter portion 62 of the first guide component 60, and the flange portion 712 and large diameter portion 721 of the second guide component 70, and the fastener element 522 is closely adhered to the double-sided tape 32 adhered to the small diameter portion 63 of the first guide component 60 and the recesses 631, 724 of the small diameter portion 722 of the second guide component 70. As a result, the roll assembly of the present invention is composed of the winding shaft 30 including the shaft 31, the first guide component 60, and the second guide component 70, and the opening-closing body 50 adhered to this winding shaft 30 with the double-sided tape 32.

[0023] The left and right vertical guide fasteners 52 of the opening / closing body 50 are inserted into the guide grooves 25 from the upper end edges of the guide rail 20. In the guide grooves 25, the width dimension of the openings of the side surfaces of the guide rail 20, i.e., the opposing surfaces, is set smaller than the thickness dimension of the fastener elements 522, and the fastener elements 522 arranged in the guide grooves 25 are configured not to slip out of the openings of the opposing surfaces of the guide grooves 25. That is, the guide rail 20 is formed with the guide grooves 25 arranged so that the fastener elements 522 of the vertical guide fasteners 52 can move along the longitudinal direction of the guide rail 20 and can be prevented from slipping out in a direction perpendicular to the longitudinal direction, i.e., in the axial direction of the winding shaft 30.

[0024] 4, the second guide part 70 can be connected to the insertion part 71 and the disk part 73 in a second orientation in which the small diameter portion 722 of the abutment part 72 is positioned on the insertion part 71 side and the large diameter portion 721 is positioned on the disk part 73 side, as shown in FIG. 5. This allows the small diameter portion 722 to be positioned between the flange portion 712 of the insertion part 71 and the large diameter portion 721 of the abutment part 72, and a recess 724 can be formed at the position of this small diameter portion 722. Therefore, even when the opening-closing body 50 has a short width, the fastener elements 522 of the vertical guide fastener 52 can be positioned in the recesses 631 and 724 and reliably bonded with the double-sided tape 32.

[0025] [Effects of the first embodiment] According to the roll screen door 1 of this embodiment, the first guide component 60 and the second guide component 70 are provided with small diameter portions 63, 722, and recesses 631, 724 are formed in which the fastener element 522 can be placed, so that the net 51, fastener tape 521, and fastener element 522, which is a retaining portion, can be closely adhered to the winding shaft 30 via the double-sided tape 32. Therefore, the adhesive strength can be increased compared to when the net 51, fastener tape 521, and part of the fastener element 522 are not adhered to the winding shaft 30, and misalignment of the opening / closing body 50 can also be suppressed. If the opening / closing body 50 becomes misaligned, the net 51 may get caught on the guide rail 20 or the vertical guide fastener 52 may come into contact with the inside of the guide rail 20, causing the opening / closing body 50 to not move smoothly when winding or unwinding, resulting in reduced operability. However, according to this embodiment, the opening / closing body 50 can be prevented from becoming misaligned and can be moved smoothly, thereby preventing a decrease in operability.

[0026] Since the recesses 631, 724 are formed continuously on the outer periphery of each guide part 60, 70, the first turn of the fastener element 522 being wound around the winding shaft 30 can be guided by the recesses 631, 724, thereby further suppressing winding misalignment of the opening / closing body 50. Furthermore, recesses 631, 724 are formed in the guide components 60, 70 attached to both ends of the shaft 31, respectively, so that the fastener elements 522 at both left and right ends of the opening / closing body 50 can be guided, further suppressing misalignment of the opening / closing body 50. Furthermore, since each guide component 60, 70 is provided with a disk portion 64, 731, if the left and right ends of the opening / closing body 50 snake back and forth due to yawing when the opening / closing body 50 is unwound or wound up, the fastener element 522 can abut against the disk portion 64, 731 to correct the snake movement, thereby further suppressing the winding misalignment of the opening / closing body 50.

[0027] Since the second guide part 70 has the insertion part 71, abutment part 72, and disk part 73 which are separate parts, even if the width dimension (finished width) of the opening / closing body 50 varies due to tolerances, the position of the recess 724 can be set according to the finished width, so the fastener elements 522 of the vertical guide fastener 52 can be placed in each recess 631, 724 and securely adhered with double-sided tape 32. Furthermore, the insertion part 71, the abutment part 72, and the disk part 73 are connected by screwing the male threaded part 713 into the female threaded parts 723 and 733, so that the abutment part 72 can be easily connected by changing the orientation thereof, and variations in the tolerance of the finished width of the opening / closing body 50 can be easily accommodated.

[0028] [Second embodiment] A roll assembly of the second embodiment will be described with reference to Fig. 6. In the following embodiments, the same components as those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. The roll assembly of the second embodiment includes a winding shaft 30B and an opening / closing body 50. In the winding shaft 30B, second guide components 70 are attached to the left and right ends of the shaft 31. Therefore, in the left and right second guide components 70, in addition to a first state shown in FIG. 6 in which the small diameter portions 722 of the contact components 72 are arranged on the respective disk components 73 sides, it is possible to select a second state in which the small diameter portion 722 of one contact component 72 is arranged on the disk component 73 side and the small diameter portion 722 of the other contact component 72 is arranged on the insertion component 71 side, or a third state in which the small diameter portions 722 of both contact components 72 are arranged on the insertion component 71 side.

[0029] According to the second embodiment, it is possible to achieve the same effects as those of the first embodiment. Furthermore, by setting the orientation of the abutting parts 72, the distance between the left and right recesses 724 can be adjusted in three stages. Therefore, the position of the recesses 724 can be adjusted in three stages to accommodate variations in tolerance of the finished width of the opening / closing body 50, and the fastener elements 522 of the vertical guide fastener 52 can be arranged in each recess 724 and reliably adhered with the double-sided tape 32.

[0030] [Third embodiment] A roll assembly according to a third embodiment will be described with reference to FIG. The roll assembly of the third embodiment is configured to include a winding shaft 30C and an opening / closing body 50. In the winding shaft 30C, first guide components 60 are attached to the left and right ends of the shaft 31, respectively.

[0031] According to the third embodiment, the first guide component 60 having the recesses 631 is attached to both the left and right ends of the shaft 31, so that, as in the first embodiment, the fastener elements 522 of the vertical guide fastener 52 can be placed in each recess 631 and reliably adhered with the double-sided tape 32. Furthermore, since the first guide component 60 is an integrally molded component, costs can be reduced compared to when the second guide component 70 is made up of three separate components.

[0032] [Fourth embodiment] A roll assembly according to the fourth embodiment will be described with reference to FIGS. The roll assembly of the fourth embodiment differs from the first embodiment in that a take-up shaft 30D is used in which a second guide component 70B is attached to the case cap 14 side of the shaft 31. The second guide component 70B is configured by connecting an insertion component 71, a second abutment component 74, and a disk component 73. The insertion component 71 and the disk component 73 are the same components as those in the first embodiment. The second abutment component 74 is configured with a small-diameter portion 741 that, like the small-diameter portion 63 of the first guide component 60, is smaller than the diameter of the shaft 31, and has a female thread portion 743 formed at its axial center. The axial thickness of the second abutment component 74 is the same as that of the abutment component 72, that is, the same as the combined thickness of the large-diameter portion 721 and the small-diameter portion 722 of the abutment component 72. In other words, the second abutment component 74 differs from the abutment component 72 in that it does not have a large-diameter portion. Therefore, a recess 744 is formed in the portion where the second abutting part 74 is disposed, that is, between the flange part 712 of the insertion part 71 and the disk part 73 .

[0033] According to the fourth embodiment, the second guide part 70B having the recess 744 is attached to one end of the shaft 31, so that, as in the first embodiment, the fastener elements 522 of the vertical guide fastener 52 can be placed in each recess 631, 744 and reliably adhered with double-sided tape 32. Furthermore, the thickness dimension of the second abutment part 74 is the same as that of the abutment part 72, and the axial width dimension of the recess 744 is larger than the width dimension of the recess 724. Therefore, even if there is variation in the tolerance of the finished width of the opening / closing body 50, the fastener element 522 can be placed in the recess 744 and adhered with double-sided tape 32 without adjusting the orientation of the second abutment part 74. Furthermore, since the second contact part 74 is made up of only the small diameter part 741, it can be manufactured at lower cost than the contact part 72.

[0034] [Variations] In the first guide component 60 and the second guide components 70, 70B, the step portions between the small diameter portions 63, 722, 741 and the large diameter portions 62, 721 or flange portions 712 may be formed as inclined surfaces in accordance with the shape of the fastener elements 522. The first guide component 60 and the second guide components 70, 70B may be attached to at least one end of the shaft 31. Furthermore, the guide components 60, 70, 70B may not have the disk portions 64, 731.

[0035] The insert part 71, the abutting part 72, the second abutting part 74, and the disk part 73 constituting the second guide parts 70 and 70B are not limited to the above-described embodiments. For example, as the abutting part 72, multiple types of abutting parts 72 with different axial thickness dimensions of the large diameter part 721 and the small diameter part 722 may be prepared, and a selection may be made according to the tolerance of the finished width of the opening / closing body 50. Similarly, multiple types of second abutting parts 74 with different axial thickness dimensions may be prepared, and a selection may be made according to the tolerance of the finished width of the opening / closing body 50. Furthermore, multiple types of insert parts 71 with different axial thickness dimensions of the flange part 712 may be prepared.

[0036] The screen device is not limited to a lift-up roll screen door, but may be a horizontally sliding roll screen door. In the above embodiment, the roll screen door 1 having the net 51 used for insect control or the like has been described as the screen device, but a roll screen device equipped with a screen used for shading or the like may also be used as the screen device. Furthermore, the method for fixing the base end of the opening / closing body, i.e., the base end of the screen and the retaining part in the payout direction, to the shaft and the small diameter part of the guide part is not limited to the method of bonding using double-sided tape, but may also be fixing using an adhesive, or fixing by welding depending on the material of the screen and shaft. Furthermore, the base end of the screen and the retaining part may also be fixed to the shaft and the guide part with rivets or screws, and the fixing method for the base end of the opening / closing body may be selected as appropriate.

[0037] [Summary of the present invention] The roll assembly of the present invention is a roll assembly comprising a shaft and an opening / closing body that can be wound up onto the shaft so as to be reeled out, wherein a guide part is attached to at least one end of the shaft, the opening / closing body has a screen and a retaining part that is provided on a side edge along the payout direction of the screen and has a thickness dimension greater than that of the screen, the guide part has a small diameter part that is smaller in diameter than the diameter of the shaft, the base end of the screen in the payout direction is fixed to the shaft, and the base end of the retaining part in the payout direction is fixed to the small diameter part. According to the present invention, a small diameter portion is provided on the guide component attached to at least one end of the shaft, and the base end of the retaining portion of the opening-closing body is fixed to the small diameter portion, so that the screen and the retaining portion can be fixed in close contact with the shaft and the guide component. Therefore, the opening-closing body can be fixed more firmly to the shaft, etc., than in a case where the screen and part of the retaining portion are not fixed to the shaft or the guide component, and misalignment of the opening-closing body can be suppressed.

[0038] In the roll assembly of the present invention, it is preferable that the guide part comprises an insertion part inserted into the shaft, an abutment part having the small diameter portion, and a disk part having a diameter larger than the diameter of the shaft, and that the insertion part, the abutment part, and the disk part are arranged and connected in this order. According to the present invention, since the insertion part, abutment part, and disk part are separate parts, by preparing multiple types of abutment parts with small diameter portions, if the finished width of the opening / closing body varies due to tolerances, the position of the small diameter portion can be set according to the finished width of the opening / closing body by changing the orientation of the abutment part or selecting the type of abutment part, so that the anti-slip part can be placed on the small diameter part and securely fixed.

[0039] In the roll assembly of the present invention, it is preferable that the abutment part has a small diameter portion having a diameter smaller than the diameter of the shaft and a large diameter portion having the same diameter as the diameter of the shaft, and can be connected to the insertion part and the disc part in either a first orientation in which the large diameter portion is located on the insertion part side and the small diameter portion is located on the disc part side, or a second orientation in which the small diameter portion is located on the insertion part side and the large diameter portion is located on the disc part side. According to the present invention, the position of the small diameter portion can be changed by changing the orientation of the abutting parts and connecting them, so that variations in tolerances in the finished width of the opening / closing body can be easily accommodated.

[0040] In the roll assembly of the present invention, it is preferable that the guide part comprises an insertion portion inserted into the shaft, the small diameter portion, and a disk portion having a diameter larger than the diameter of the shaft, and that the small diameter portion is formed between the insertion portion and the disk portion. According to the present invention, an integrally molded guide component having a small diameter portion between the insertion portion and the disk portion is used, which reduces costs compared to when the guide component is constructed by connecting separate components.

[0041] In the roll assembly of the present invention, the guide components are preferably attached to both ends of the shaft. According to the present invention, since the guide components are attached to both ends of the shaft, the retaining portions on both side edges of the opening / closing body can be fixed to the small diameter portion, further improving the effect of suppressing the opening / closing body from shifting when wound.

[0042] The screen device of the present invention comprises the roll assembly and a guide rail that guides the screen in the unwinding direction, and is characterized in that the guide rail has a guide groove formed therein that allows the anti-slip portion to move along the longitudinal direction of the guide rail and to be prevented from slipping out in a direction perpendicular to the longitudinal direction. According to the present invention, since the roll assembly is provided, the opening / closing body can be prevented from becoming misaligned, the opening / closing body can be prevented from getting caught on the guide rail, the opening / closing body can be moved smoothly, and a decrease in operability can be prevented. [Explanation of symbols]

[0043] 1...roll screen, 10...case, 20...guide rail, 25...guide groove, 30...winding shaft, 30B...winding shaft, 30C...winding shaft, 30D...winding shaft, 31...shaft, 50...opening / closing body, 51...net, 52...vertical guide fastener, 60...first guide part, 61...insertion part, 62...large diameter part, 63...small diameter part, 64...disk part, 70...second guide part, 70B...second guide part, 71...insertion part, 72...abutment part, 73...disk part, 74...second abutment part, 521...fastener tape, 522...fastener element, 631...recess, 721...large diameter part, 722...small diameter part, 724...recess, 741...small diameter part, 744...recess.

Claims

1. A roll assembly including a shaft and an opening / closing body that is reeled out and wound around the shaft, A guide part is attached to at least one end of the shaft, the opening / closing body includes a screen and a retaining portion provided on a side edge portion along a payout direction of the screen and having a thickness dimension greater than that of the screen, The guide part has a small diameter portion having a diameter smaller than a diameter of the shaft, a base end portion of the screen in the payout direction is fixed to the shaft; A roll assembly in which a base end portion of the retaining portion in the payout direction is fixed to the small diameter portion.

2. 2. The roll assembly of claim 1, the guide part includes an insertion part inserted into the shaft, an abutment part having the small diameter portion, and a disk part having a diameter larger than a diameter of the shaft, A roll assembly in which the insertion part, the abutment part, and the disk part are arranged and connected in this order.

3. 3. The roll assembly of claim 2, The abutting part is a small diameter portion having a diameter smaller than that of the shaft, and a large diameter portion having a diameter equal to that of the shaft; A roll assembly that can be connected to the insertion part and the disk part in either a first orientation in which the large diameter portion is located on the insertion part side and the small diameter portion is located on the disk part side, or a second orientation in which the small diameter portion is located on the insertion part side and the large diameter portion is located on the disk part side.

4. 2. The roll assembly of claim 1, the guide component includes an insertion portion that is inserted into the shaft, the small diameter portion, and a disk portion having a diameter larger than a diameter of the shaft, The small diameter portion is a roll assembly formed between the insertion portion and the disk portion.

5. 5. The roll assembly according to claim 1, The guide components are roll assemblies attached to both ends of the shaft.

6. A roll assembly according to any one of claims 1 to 4; a guide rail for guiding the screen in a payout direction, The guide rail is formed with a guide groove in which the retaining portion is arranged so as to be movable along the longitudinal direction of the guide rail and so as to be retained in a direction perpendicular to the longitudinal direction. A screen device characterized by:

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