Roll screen device and groove formation block used for the same

Abstract

To provide a roll screen device capable of surely engaging an engaging element with an engaging groove during delivery of a screen in which winding deviation occurs, and a groove formation block used for the same.SOLUTION: A roll screen device 1 connects the base end of a screen 20 having engaging elements 23 provided at both side ends to a winding shaft 10 rotatably supported in a winding box 3, and derives the tip side of the screen from the winding box. Side rods 43A and 43B are provided at both ends of the winding box so as to extend in a screen deriving direction. At the side rods, engaging grooves 55A and 55B are provided, which engage the engaging elements wider than slits with the slits extending along the rod sides to open on the screen side in a disengagement prevention state. The engaging grooves include first to third guide surfaces 60a-78b plotting the inside of the screen side, and slits are opened on the guide surfaces. The second guide surfaces 78a and 78b include slopes 85a and 85b inclined vertically inward toward the winding shaft side at the tip of the winding shaft side of the engaging grooves.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a roll screen device and a groove forming block used therefor, and more particularly, to a roll screen device for guiding both side ends of a screen that can be wound and unwound with respect to a winding shaft in a retaining state along an engaging groove extended along a guide rail, and a groove forming block used therefor.

Background Art

[0002] Roll screen devices for guiding both side ends of a screen in a retaining state along an engaging groove are known in various forms. As described in Patent Document 1, this conventional roll screen device is configured to open and close the screen while guiding the screen along the engaging groove by slidably engaging a large number of engaging elements connected to both side ends of the screen with the engaging groove in a retaining state.

[0003] By the way, in a roll screen device of a type in which both side ends of such a screen are guided by the engagement of an engaging element and an engaging groove, it is already widely known as described in Patent Document 1 and the like that the screen may be wound in a state of being displaced in the axial direction with respect to the winding shaft. When the screen with such a winding deviation is unwound from the winding shaft, the engaging element may move in a state of being displaced with respect to the engaging groove, and there may be a case where the engaging element cannot be engaged with the engaging groove in a retaining state. As a result, it becomes difficult to smoothly open and close the screen.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The technical problem of the present invention is to provide a roll screen device of a type in which both side ends of a screen are guided by engagement between an engaging element and an engaging groove. Even if the screen is wound up in a state of being displaced relative to the winding shaft, when the screen is paid out from the winding shaft, an engaging element can be surely engaged with an engaging groove in a retaining state. Another object is to provide a roll screen device and a groove forming block used therefor.

Means for Solving the Problem

[0006] To solve the above problems, a roll screen device according to the present invention includes a hollow winding box, a winding shaft rotatably supported inside the winding box, a screen having a base end connected to the winding shaft and a tip end led out from the winding box to the outside, and engaging elements provided at both side ends, a pair of side rods connected to both longitudinal ends of the winding box and extending along the leading direction of the screen, and engaging grooves extending along each of these side rods and engaging the engaging elements wider than a slit opening to the screen side in a retaining state. The roll screen device opens and closes the screen while guiding the screen through the pair of engaging grooves. The engaging groove has an opening at an end face on the winding shaft side and has a guide surface partitioning an inner surface on the screen side along the side rod. A slit is provided in the guide surface. The guide surface includes an inclined surface inclined inward in the longitudinal direction toward the winding shaft side at an end of the engaging groove on the winding shaft side.

[0007] In this case, preferably, the inclined surface extends to the end surface on the winding shaft side of the engagement groove. Also, preferably, the winding shaft has a winding main body for winding the screen, and end winding portions that project outward in the longitudinal direction from both ends in the longitudinal direction of the winding main body for winding the engaging element. The diameter of the end winding portion is formed to decrease from the base end portion on the winding main body side of the end winding portion toward the tip end portion on the outer side in the longitudinal direction. The edge of the inclined surface that extends to the end surface of the engagement groove is located between the base end portion and the tip end portion of the end winding portion.

[0008] Also, preferably, the engagement groove is formed between the guide surface and the bottom surface facing the guide surface, and has a hole portion for movably accommodating the engaging element. The height of the hole portion between the inclined surface and the bottom surface is formed to gradually increase as it advances toward the winding shaft side.

[0009] Also, preferably, the winding box is provided with a lead-out port for leading the screen out of the winding box. The engagement groove extends into the winding box from each of the longitudinal direction both ends of the lead-out port. The engagement groove has a side rod side engagement groove arranged on the side rod side closer to the side rod than the lead-out port, and a winding shaft side engagement groove arranged closer to the winding shaft than the side rod side engagement groove and extending into the winding box. The winding shaft side engagement groove is provided so as to be position adjustable in the longitudinal direction with respect to the winding shaft. Also, preferably, the side rod side engagement groove is provided in an inner rail arranged in parallel in the side rod, and the winding shaft side engagement groove is provided in a groove forming block formed separately from the inner rail. The groove forming block has a long hole extending in the longitudinal direction, and the position with respect to the winding shaft can be adjusted by inserting a fastening member through the long hole and fastening it to the winding box or the side rod.

[0010] Further, preferably, the groove forming block has a first block and a second block that are longitudinally divided along the slit of the winding shaft side engaging groove, and side surfaces of these first and second blocks that face each other in the thickness direction are joined to be integrally formed.

[0011] Further, preferably, the groove forming block is configured such that, in a state where all of the screen is wound around the winding shaft, the engaging element provided on the leading end side of the screen is positioned within the winding shaft side engaging groove.

[0012] Further, preferably, the inner rail is connected to a rail support portion arranged in parallel within the side rod, and the rail support portion is provided so as to be position adjustable in the longitudinal direction with respect to the side rod.

[0013] Further, preferably, the groove forming block according to the present invention is the groove forming block used in the roll screen device.

Advantages of the Invention

[0014] In the roll screen device of the type in which both side ends of the screen are guided by the engagement of the engaging element and the engaging groove, the roll screen device according to the present invention provides a guide surface that partitions along the side rod on the inner surface of the engaging groove on the screen side, opens a slit in this guide surface, and provides an inclined surface that inclines inward in the longitudinal direction toward the winding shaft side at the winding shaft side end of the engaging groove in the guide surface. Thus, even if the screen is wound in a state where it is misaligned with respect to the winding shaft, when the screen is fed out from the winding shaft, it is possible to reliably engage the engaging element with the engaging groove in a state where it is prevented from coming off. It is possible to provide a roll screen device and a groove forming block used therefor.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

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Figure 5

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Figure 8

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Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Embodiments for Carrying Out the Invention

[0016] Figs. 1 - 15 show an embodiment of a roll screen device according to the present invention. In this embodiment, as shown in Fig. 1, a horizontally opening roll screen device 1 that opens and closes by horizontally moving a screen 20 will be described. Note that the roll screen device is not limited to the horizontally opening type, and a vertically opening type that opens and closes by raising and lowering the screen vertically may also be used.

[0017] The roll screen device 1 includes a hollow winding box 3, a winding shaft 10 rotatably supported inside the winding box 3 and rotationally biased in the winding direction of the screen 20 by the biasing force of a built-in coil spring 11 (spring), a screen 20 having a base end connected to the winding shaft 10 and a tip end led out from the winding box 3, side frames 43A, 43B (side rods) that movably support a movable bar 30 attached to the tip end portion of the screen 20, and engaging grooves 55A, 55B that engage a wider engaging member 23 in a retaining state with respect to slits 61a, 61b, 75a, 75b, 79a, 79b (see Figs. 5, 6, 9, and 13) extending along the side frames 43A, 43B and opening toward the screen 20 side. It is configured as a horizontally pulling type device that opens and closes while guiding the screen 20 into the engaging grooves 55A, 55B.

[0018] The engaging grooves 55A and 55B, as shown in FIGS. 1, 5, 6, 8 - 15, include first to third guide surfaces 60a, 60b, 78a, 78b, 74a, 74b that partition the inner surfaces 63a, 63b on the screen 20 side along the side frames 43A, 43B, outer accommodation hole portions 59a, 59b, base - end - side accommodation hole portions (hole portions) 73a, 73b, and tip - end - side accommodation hole portions (hole portions) 77a, 77b that extend along these guide surfaces 60a - 78b and movably accommodate the engaging elements 23, and slits 61a - 79b that are formed in these guide surfaces 60a - 74b. The end faces 55a, 55b of the engaging grooves 55A, 55B on the winding shaft 10 side are open.

[0019] For convenience of explanation, in the following description, the longitudinal direction in which the winding box 3 extends may be referred to as the "vertical direction", the direction in which the side frames 43A and 43B extend may be referred to as the "left - right direction", and the depth direction of the roll - screen device 1 may be referred to as the "front - rear direction".

[0020] As shown in FIGS. 1 - 3, the roll - screen device 1 includes a screen frame 40 having a pair of vertical frames 41A, 41B and a pair of side frames 43A, 43B (side rods). In this embodiment, the vertical frame 41A arranged on the right side of the pair of vertical frames 41A, 41B is configured as a winding box 3 provided with a winding shaft 10 for winding the screen 20 inside. The vertical frame 41B arranged on the left side is configured as a receiving frame against which the movable bar 30 attached to the tip of the screen 20 abuts when the screen 20 is opened.

[0021] Also, the right ends of the pair of side frames 43A, 43B are connected to the upper and lower ends of the inner side wall 3a in the winding box 3, and the left ends of the side frames 43A, 43B are connected to the upper and lower ends of the inner side wall 41B1 in the vertical frame 41B.

[0022] The take-up box 3 has a hollow interior. In the present embodiment, the take-up box 3 is formed in a rectangular tube shape, and on the rear side of the inner-facing side wall 3a, an outlet 3b for guiding out the screen 20 and extending in the vertical direction (longitudinal direction) is provided. The outlet 3b extends between the upper and lower portions of the side wall 3a and is formed in a rectangular shape in a side view. Inside this take-up box 3, a take-up shaft 10 is rotatably supported around an axis L extending in the vertical direction.

[0023] The take-up shaft 10 is formed in a cylindrical shape extending in the vertical direction, and has a take-up main body portion 15 for taking up the screen 20, and end take-up portions 13a, 13b that project vertically from both upper and lower ends of the take-up main body portion 15 in the vertical direction for taking up the engaging elements 23 of the screen 20. In the present embodiment, the end take-up portions 13a, 13b are inserted into both upper and lower ends of the take-up main body portion 15 respectively. The end take-up portions 13a, 13b are formed such that their diameters become smaller from the base end portions on the side of the take-up main body portion 13 of the end take-up portions 13a, 13b toward the tip end portions on the outer side in the longitudinal direction. In the present embodiment, on the portions of the end take-up portions 13a, 13b that project from both upper and lower ends of the take-up shaft 10, winding surfaces 14a, 14b having a smaller diameter than the take-up shaft 10 and inclined toward the axis L side in the outer direction of the axis L are provided around the axis L. Inside the take-up shaft 10, a spring shaft 12 arranged coaxially with the take-up shaft 10 and having its upper end projecting from the take-up shaft 10 and fixedly supported by the take-up box 3 is provided. A coil spring 11 is inserted around the axis of the spring shaft 12. The lower end of the coil spring 11 is connected to the take-up shaft 10, and the upper end of the coil spring 11 is connected to the spring shaft 12. Therefore, when the screen 20 is paid out, the coil spring 11 is twisted by the rotation of the take-up shaft 10 to accumulate a winding force, and the take-up shaft 10 can be rotationally driven by the accumulated winding force at this time to automatically take up the screen 20.

[0024] A movable bar 30 is attached to the tip of the screen 20. The movable bar 30 extends in the vertical direction, and at both the upper and lower ends of the movable bar 30, as shown in FIGS. 3-6, there are provided accommodation recesses 31a, 31b that open outward in the vertical direction and open at both the front and rear ends. The inner rails 48a, 48b and the groove-forming blocks 65A, 65B, which will be described later, are movably accommodated in the accommodation recesses 31a, 31b. Further, a roller 32 rotatably supported around a rotation axis extending in the front-rear direction is disposed on the rear side of the upper end of the movable bar 30. This roller 32 can roll on an outer rail 42 extending along the side frame 43A, and by this roller 32 rolling on the outer rail 42, the left-right movement of the movable bar 30 during the opening and closing operation of the screen 20 is guided.

[0025] As shown in FIGS. 3-7, the screen 20 is formed in a rectangular shape in a front view in a state of being led out from the outlet 3b of the winding box 3. The right end thereof is connected to the winding shaft 10, and the left side is led out from the outlet 3b to the outside. Engagement members 21 are provided at both the upper and lower ends of the screen 20. The engagement member 21 includes a mounting piece portion 22 continuously provided along the side edges of both the upper and lower ends of the screen 20, and a number of engaging elements 23 continuously provided along the side edges of both the upper and lower ends of the mounting piece portion 22. The engaging elements 23 are engaged in a non-removable state with the engaging grooves 55A, 55B (see FIGS. 1 and 3) extended on the side frames 43A, 43B, and move along the engaging grooves 55A, 55B when the screen 20 is opened and closed. Details of the engaging grooves 55A, 55B will be described later.

[0026] An engaging member 21 is also provided at the tip of the screen 20, and the engaging element 23 of this engaging member 21 is attached to the right end of the movable bar 30 in a state where it is prevented from coming off (see Fig. 3). The screen 20 can move between an open state in which all of the screen 20 is led out from the outlet 3b by moving the movable bar 30 from the winding box 3 toward the left side, and a closed state in which all of the screen 20 is wound around the winding shaft 10 by the coil spring 11 (see Fig. 3). When the screen 20 is in the closed state, the right end of the movable bar 30 abuts against the inner side wall 3a of the winding box 3, and the closed state of the screen 20 is maintained.

[0027] Next, the engaging grooves 55A and 55B for guiding the movement of the engaging member 21 of the screen 20 will be described. First, before describing the engaging grooves 55A and 55B, the upper and lower side frames 43A and 43B on which these are provided will be described. As shown in Figs. 4 - 6, these side frames 43A and 43B are formed in a hollow rectangular tube shape. On the rear side of the bottom walls 44a and 44b provided at the bottom of the side frames 43A and 43B, insertion holes 45a and 45b that extend in the left - right direction and through which the upper and lower ends of the movable bar 30 can move are opened.

[0028] On the rear walls 46a and 46b of the side frames 43A and 43B, plate - shaped rail support portions 47a and 47b that project inward of the side frames 43A and 43B and extend along the side frames 43A and 43B are provided. The rail support portions 47a and 47b extend to a position having a predetermined distance in front of the right end from the left end of the side frames 43A and 43B. At both front - rear ends of these rail support portions 47a and 47b, locking grooves 47a1 and 47b1 that are arranged opposite to each other and open inward and are hollow inside extend along the side frames 43A and 43B. Between these locking grooves 47a1 and 47b1, opening portions 47a2 and 47b2 that extend along the side frames 43A and 43B are provided. Inner rails 48a and 48b are attached to these locking grooves 47a1 and 47b1.

[0029] The inner rails 48a and 48b extend along the rail support portions 47a and 47b. The inner rails 48a and 48b include rail body portions 49a and 49b that protrude from the inside to the outside of the openings 47a2 and 47b2 of the rail support portions 47a and 47b and are hollow inside, and a pair of flange portions 50a and 50b that protrude from both sides of the upper ends of the rail body portions 49a and 49b. The rail body portions 49a and 49b and the flange portions 50a and 50b also extend along the rail support portions 47a and 47b. The inner rails 48a and 48b are attached to the rail support portions 47a and 47b with the flange portions 50a and 50b inserted into the locking grooves 47a1 and 47b1 and the rail body portions 49a and 49b protruding from the openings 47a2 and 47b2.

[0030] In the present embodiment, as shown in FIGS. 3 - 6, 9, and 13, the engagement grooves 55A and 55B include first engagement grooves (side rod side engagement grooves) 56a and 56b provided in the inner rails 48a and 48b, second engagement grooves (take-up shaft side engagement grooves) 58a and 58b extending from the outlet 3b into the take-up box 3, and third engagement grooves (take-up shaft side engagement grooves) 57a and 57b arranged between the first engagement grooves 56a and 56b and the second engagement grooves 58a and 58b (see FIG. 3).

[0031] The first engagement grooves 56a and 56b include outer accommodation hole portions 59a and 59b provided inside the rail body portions 49a and 49b for movably accommodating the engaging elements 23, and first guide surfaces 60a and 60b formed on the inner surfaces of the outer accommodation hole portions 59a and 59b on the screen 20 side. Slits 61a and 61b that are open on the screen 20 side are provided on the first guide surfaces 60a and 60b.

[0032] In this embodiment, the rail main body parts 49a and 49b are formed in a rectangular shape with a cross section extending in the vertical direction, and the outer accommodation hole parts 59a and 59b are also formed in a rectangular shape with a cross section extending in the vertical direction. The outer accommodation hole parts 59a and 59b extend along the rail main body parts 49a and 49b and are open at both ends in the left - right direction. At the central part of the first guide surfaces 60a and 60b in the front - rear direction, slits 61a and 61b extending along the side frames 43A and 43B are formed. The slits 61a and 61b are formed such that the width in the front - rear direction of the slits 61a and 61b is larger than the thickness of the attachment piece part 22 and narrower than the width of the engaging element 23 so as to engage the engaging element 23 in a retaining state.

[0033] The ends of the inner rails 48a and 48b on the winding box 3 side are arranged at positions having intervals 62a and 62b in the left - hand direction from the inner side wall 3a of the winding box 3 (see FIG. 3). For this reason, the ends of the first engaging grooves 56a and 56b on the winding box 3 side are also arranged inside the side wall 3a in the left - right direction. Inside these intervals 62a and 62b, groove - forming blocks 65A and 65B provided with the third engaging grooves 57a and 57b and the second engaging grooves 58a and 58b are arranged (see FIG. 1). The groove - forming blocks 65A and 65B are attached to the side frames 43A and 43B in a state where the tip parts on the winding shaft 10 side are inserted from the outlet 3b.

[0034] As shown in FIGS. 1, 5, 6, 8 - 15, the groove - forming blocks 65A and 65B are formed in a plate shape extending in the left - right direction and having a thin thickness in the front - rear direction (see FIGS. 1 and 8). In this embodiment, the groove - forming blocks 65A and 65B are integrally formed in a state where the first blocks 67a and 67b and the second blocks 68a and 68b, which are vertically divided along the slits 79a, 79b, 75a, and 75b of the second and third engaging grooves 58a, 58b, 57a, and 57b, are in contact with each other. Details of the first and second blocks 67a, 67b, 68a, and 68b will be described later.

[0035] On the right side (take-up shaft 10 side) of the groove forming blocks 65A and 65B, projecting portions 70a and 70b that project outward in the axial direction L and extend in the left-right direction are formed (see FIGS. 1 and 8). On the left side of the groove forming blocks 65A and 65B (the first blocks 67a and 67b), attachment portions 71a and 71b that project outward in the axial direction L and extend in the left-right direction are formed. In the attachment portion 71a of the groove forming block 65A, a long hole-shaped attachment hole 72 that extends in the vertical direction is provided, and in the attachment portion 71b of the groove forming block 65B, a circular hole portion 83 is provided. By fastening fastening means such as bolts inserted through these attachment holes 72 and 83 to the support plate portions 4a and 4b that project from the inner surfaces of the upper and lower ends of the take-up box 3, the groove forming block 65A is attached to the take-up box 3 so that its position can be adjusted in the vertical direction, and the groove forming block 65B is fixedly attached to the take-up box 3. Note that the groove forming blocks 65A and 65B are not limited to being attached to the take-up box 3, and may be attached to the side frames 43A and 43B. Details of the vertical position adjustment of the groove forming block 65A will be described later.

[0036] Also, as shown in FIGS. 3, 5, and 6, the front-rear width of the groove forming blocks 65A and 65B has a width that can be accommodated in the accommodation recesses 31a and 31b provided at the upper and lower ends of the movable bar 30 when the screen 20 is closed. For this reason, when the screen 20 is in the closed state, the groove forming blocks 65A and 65B are accommodated in the accommodation recesses 31a and 31b of the movable bar 30, so the movable bar 30 does not come into contact with the groove forming blocks 65A and 65B.

[0037] Next, the internal structures of the groove forming blocks 65A and 65B will be described. As shown in FIG. 1, the second and third engaging grooves 57a, 57b, 58a, and 58b are provided on the second and third guide surfaces 78a, 78b, 74a, and 74b provided on the inner surfaces 63a and 63b formed inside the groove forming blocks 65A and 65B, and the slits 79a, 79b, 75a, and 75b formed on these guide surfaces 78a - 74b (see FIGS. 8, 9, and 13), and are formed between the bottom surfaces 64a and 64b facing these guide surfaces 78a - 74b, and have proximal and distal end receiving hole portions 73a, 73b, 77a, and 77b (holes, see FIGS. 8, 9, and 14) for movably accommodating the engaging element 23. That is, the third engaging grooves 57a and 57b are formed inside the left end portions of the groove forming blocks 65A and 65B, and the second engaging grooves 58a and 58b are formed inside the right end portions of the groove forming blocks 65A and 65B. These engaging grooves 57a, 57b, 58a, and 58b extend along the left - right direction and communicate with each other. The second engaging grooves 58a and 58b open at the right ends of the groove forming blocks 65A and 65B, and the third engaging grooves 57a and 57b open at the left ends of the groove forming blocks 65A and 65B.

[0038] As shown in FIGS. 8 - 15, the third engaging grooves 57a and 57b extend from the left end faces of the groove forming blocks 65A and 65B toward the vicinity of the left end portions of the protruding portions 70a and 70b to the right. The third guide surfaces (guide surfaces) 74a and 74b partition the inner surfaces 63a and 63b on the screen 20 side along the side frames 43A and 43B and are formed in a planar shape. The proximal end receiving hole portions 73a and 73b extend in the left - right direction between the third guide surfaces 74a and 74b and the bottom surfaces 64a and 64b facing them. In the present embodiment, the proximal end receiving hole portions 73a and 73b are formed with a rectangular cross - section in the vertical direction and are formed in a rectangular parallelepiped shape extending in the left - right direction. Since the sizes of the proximal end receiving hole portions 73a and 73b are formed larger than the engaging element 23, the engaging element 23 can move freely within the proximal end receiving hole portions 73a and 73b. Also, the left ends of the proximal end receiving hole portions 73a and 73b are open.

[0039] At the central portions of the third guide surfaces 74a and 74b in the front-rear direction, slits 75a and 75b are formed which open on the screen 20 side and extend along the third guide surfaces 74a and 74b. The left end portions of these slits 75a and 75b open to the left end faces of the groove forming blocks 65A and 65B, and the right end portions of the slits 75a and 75b communicate with the slits 79a and 79b of the second engaging grooves 58a and 58b. Further, the slits 75a and 75b are configured to engage the engaging element 23 in a retaining state. That is, the slits 75a and 75b are formed such that their width is larger than that of the attachment piece portion 22 and narrower than the width of the engaging element 23.

[0040] Also, the proximal end side housing holes 73a and 73b and the slits 75a and 75b communicate with the outer housing holes 59a and 59b and the slits 61a and 61b of the first engaging grooves 56a and 56b regardless of the vertical position adjustment of the groove forming blocks 65A and 65B.

[0041] Next, the second engaging grooves 58a and 58b will be described. The second engaging grooves 58a and 58b extend into the winding box 3 from the upper and lower end portions of the lead-out port 3b, respectively (see FIGS. 1 and 2). The second engaging grooves 58a and 58b have front end side housing holes 77a and 77b which extend in the left-right direction and movably house the engaging element 23, second guide surfaces (guide surfaces) 78a and 78b which partition the inner surfaces 63a and 63b on the screen 20 side of the front end side housing holes 77a and 77b along the front end side housing holes 77a and 77b, and slits 79a and 79b which are formed in the second guide surfaces 78a and 78b and open on the screen 20 side.

[0042] The tip-side accommodation hole portions 77a and 77b are connected to the ends of the base-side accommodation hole portions 73a and 73b on the winding shaft 10 side and extend linearly toward the winding shaft 10 side. Further, the vertical (up and down) height of the tip-side accommodation hole portions 77a and 77b gradually increases as it advances toward the winding shaft 10 side. For this reason, the right edge rims of the tip-side accommodation hole portions 77a and 77b are largely open at the right end faces 55a and 55b of the groove-forming blocks 65A and 65B. The sizes of the tip-side accommodation hole portions 77a and 77b are formed larger than the engaging element 23 and have a size that allows the engaging element 23 to move freely.

[0043] The second guide surfaces 78a and 78b are formed in a planar shape inclined inward in the axial direction L toward the winding shaft 10 side and include inclined surfaces 85a and 85b inclined inward in the axial direction L toward the winding shaft 10 side. In the present embodiment, the inclined surfaces 85a and 85b extend between both end portions in the extending direction of the second guide surfaces 78a and 78b and extend to the end faces 55a and 55b on the winding shaft 10 side of the engaging grooves 55A and 55B. Further, the edge rims of the inclined surfaces 86a and 85b at the end faces 55a and 55b of the engaging grooves 55A and 55B are located between the base end portions and the tip end portions of the end winding portions 13a and 13b. In the present embodiment, the edge rims of the inclined surfaces 85a and 85b are arranged at positions close to the base end portions of the end winding portions 13a and 13b. (See FIG. 1).

[0044] Slits 79a and 79b through which the screen 20 side opens are provided at the central portions in the front-rear direction of the second guide surfaces 78a and 78b. These slits 79a and 79b extend along the second guide surfaces 78a and 78b. The left ends of the slits 79a and 79b communicate with the slits 75a and 75b of the third engaging grooves 57a and 57b and open at the left end faces of the protruding portions 70a and 70b. Further, the ends on the winding shaft 10 side of the slits 79a and 79b are open. Also, the slits 79a and 79b are configured to engage the engaging element 23 in a retaining state. That is, the slits 79a and 79b are formed such that their widths are larger than the thickness of the attachment piece portion 22 and narrower than the width of the engaging element 23.

[0045] The tip-side accommodation holes 77a and 77b communicate with the base-end side accommodation holes 73a and 73b of the third engagement grooves 57a and 57b. And the left edges of the second guide surfaces 78a and 78b of the second engagement grooves 58a and 58b are connected to the right ends of the third guide surfaces 74a and 74b of the third engagement grooves 57a and 57b. Also, in the present embodiment, the edges of the inclined surfaces 85a and 85b on the winding shaft 10 side are arranged at positions close to the outermost peripheral surface of the screen 20 in a state where all of the screen 20 is wound around the winding shaft 10 (closed state) (see FIG. 3). Further, the groove forming blocks 65A and 65B are configured such that when the screen 20 is in the closed state, the tip-side engaging elements 23a (engaging elements) provided on the tip side of the screen 20 are positioned within the second and third engagement grooves 58a, 58b, 57a, and 57b (engagement grooves) (see FIG. 16). For this reason, when the screen 20 is pulled out, the tip-side engaging element 23a can be securely engaged in a state of being prevented from coming out of the slits 79a and 79b.

[0046] The groove forming blocks 65A and 65B configured as described above are, as shown in FIGS. 8 to 15, divided into two (hereinafter referred to as "halved") with respect to a virtual surface 76 that extends in the vertical direction (longitudinal direction) through the slits 75a, 75b, 79a, and 79b of the third engagement grooves 57a and 57b and the second engagement grooves 58a and 58b along the left-right direction, and include a first block 67a, 67b and a second block 68a, 68b.

[0047] The first block 67a of the groove forming block 65A is formed in a plate shape extending in the left-right direction, as shown in FIGS. 10 and 11. A halved protruding portion 70a is formed at the right end of the first block 67a, and a mounting portion 71a is formed at the upper left of the first block 67a. A long hole-shaped mounting hole 72 is provided in the mounting portion 71a.

[0048] Below the lower part of the inner upper end surface 81a in the first block 67a, semi-divided tip-side and base-end-side communication movement holes 77a, 73a, second and third guide surfaces 78a, 74a are formed. Since these structures have been described above, the description is omitted. Two hole portions 69 provided above the tip-side and base-end-side accommodation hole portions 77a, 73a in the first block 67a are in communication with two hole portions 69 provided in the second block 68a, and by fastening fastening means such as bolts inserted through these hole portions 69, these blocks 68a, 68b are integrally fixed. The lower end surface 80a of the first block 67a extending downward from the second and third guide surfaces 78a, 74a is arranged at a position shifted parallel to the rear side with respect to the upper end surface 81a. In the present embodiment, the amount of shift of the lower end surface 80a to the rear side with respect to the upper end surface 81a has a magnitude corresponding to half of the width t (see FIG. 9) of the slits 75a, 79a.

[0049] The second block 68a of the groove forming block 65A will be described regarding the differences from the first block 67a, and the same parts as the first block 67a will be denoted by corresponding reference numerals and the description thereof will be omitted. As shown in FIGS. 10 and 12, in the second block 68a, the mounting portion 71a and the mounting hole 72 formed in the first block 67a are not formed in the upper left portion of the second block 68a. On the inner end surface of the second block 68a, semi-divided tip-side and base-end-side accommodation hole portions 77a, 73a in the second and third engagement grooves 58a, 57a, and second and third guide surfaces 78a, 74a are formed. The inner lower end surface 80b (see FIG. 12) of the second block 68a extending downward from the second and third guide surfaces 78a, 74a is arranged shifted parallel to the front side with respect to the upper end surface 81b. In the present embodiment, the amount of shift of the lower end surface 80b to the front side with respect to the upper end surface 81b has a magnitude corresponding to half of the width t (see FIG. 9) of the slits 75a, 79a.

[0050] On the one hand, as shown in FIGS. 13 to 15, the first and second blocks 67b and 68b constituting the groove forming block 65B are formed symmetrically with respect to the first and second blocks 67a and 68a of the groove forming block 65A described above. For this reason, in the groove forming block 65B, the same reference numerals are given to the same parts as those in the groove forming block 65A, and the description thereof is omitted, and the points different from those in the groove forming block 65A will be described.

[0051] The mounting portion 71b formed in the first block 67b is provided with a circular hole 83 through which fastening means such as bolts are passed. For this reason, the groove forming block 65B is fixed to the winding box 3 by fastening the fastening means such as bolts inserted through the holes 83 and 83 provided in the first and second blocks 67b and 68b. The groove forming block 65B may be provided with a long hole-shaped mounting hole 72 extending in the vertical direction so that the position can be adjusted in the vertical direction with respect to the winding box 3. Since the second block 68b is formed symmetrically with respect to the second block 68a (see FIG. 12) in the vertical direction, the description thereof is omitted.

[0052] A method for attaching the groove forming blocks 65A and 65B configured as described above to the winding box 3 will be described. First, with the screen 20 drawn out from the outlet 3b to the outside (see Fig. 16), the first blocks 67a and 67b are arranged behind the engaging element 23 outside the outlet 3b, and the second blocks 68a and 68b are arranged in front of the engaging element 23. Then, the inner end faces of the first and second blocks 67a, 68a, 67b, and 68b arranged to face each other on both the front and rear sides with the engaging element 23 at the center are brought into contact. As a result, the engaging element 23 is accommodated in the tip-side and base-end-side accommodation hole portions 77a, 77b, 73a, and 73b, and the attachment piece portions 22 are accommodated in the slits 79a, 79b, 75a, and 75b. Then, the first and second blocks 67a - 68b are integrally joined by bolts inserted through the holes 69. Therefore, the engaging element 23 is engaged in a retaining state with respect to the slits 79a - 75b. Then, with the end portions of the groove forming blocks 65A and 65B on the winding shaft 10 side inserted into the winding box 3 from the outlet 3b of the winding box 3, the groove forming blocks 65A and 65B are fixed to the winding box 3 with bolts inserted through the mounting holes 72.

[0053] Next, the operation of the roll screen device 1 when the screen 20 wound in a state of being misaligned with the winding shaft 10 is fed out from the winding shaft 10 will be described. As shown in Fig. 16, when the movable bar 30 is moved in a direction away from the winding shaft 10 (leftward direction) when the screen 20 is wound in a state of being misaligned with the winding shaft 10, the screen 20 is fed out from the winding shaft 10. At the same time, among the numerous engaging elements 23 provided at both end portions of the screen 20, the engaging element 23 disposed at the tip portion in the screen operating direction (hereinafter referred to as "tip-side engaging element 23a") moves in the screen feeding direction along the third guide surfaces 74a and 74b in a retaining state with respect to the slits 75a and 75b of the third engaging grooves 57a and 57b.

[0054] Also, the engaging member 23 of the screen 20 wound around the base end portion in the axial direction L of the end winding portions 13a and 13b (hereinafter referred to as "inner winding engaging member 23b") moves into the tip-side accommodating hole portions 77a and 77b of the second engaging grooves 58a and 58b, and engages with the slits 79a and 79b of the second engaging groove 58a in a retaining state, and moves along the inclined surface 85a.

[0055] Then, as the inner winding engaging member 23b moves along the third guide surface 74a, the screen 20 moves while being displaced outward in the axial direction L. Therefore, it is possible to eliminate the deviation of the screen 20 wound around the winding shaft 10 in a bamboo shoot shape.

[0056] Also, when the screen 20 is wound around the winding shaft 10 and the screen 20 is deviated, by adjusting the mounting positions of the groove forming blocks 65A and 65B, the engaging member 23 of the screen 20 can be surely engaged with the engaging grooves 55A and 55B.

[0057] In the above-described embodiment, the rail support portion 47a that supports the inner rail 48a is shown as being integrally formed with the side frame 43A, but the present invention is not limited thereto. As shown in FIG. 17, the rail support portion 87 may be formed separately from the side frame 43A and may be provided so as to be position-adjustable in the vertical direction. The rail support portion 87 according to this modification example has a support portion main body 87a that supports the inner rail 48a, and two plate-shaped first support arm portions 87b and second support arm portions 87c that project upward from both front and rear end portions of the support portion main body 87a and extend along the inner rail 48a. A plurality of holes (not shown) through which the shaft portion of the bolt 90 is inserted are provided at both left and right end portions of the front-side first support arm portion 87b among the first and second support arm portions 87b and 87c, with a space therebetween in the vertical direction.

[0058] On the inner surface of the top plate 43a of the side frame 43A, a fixing member 91 for fixing the rail support portion 87 is attached. The fixing member 91 is arranged in parallel with the top plate 43a, and includes a fixing member main body 91a fixed to the top plate 43a, and two plate-like first fixing arm portions 91b and second fixing arm portions 91c extending downward from both front and rear end portions of the fixing member main body 91a. Female screw portions 92 into which bolts 90 can be screwed are provided at both left and right end portions of the front-side first fixing arm portion 91b among the first and second fixing arm portions 91b and 91c. In this modification, the female screw portion 92 is provided at the lower end portion of the first fixing arm portion 91b.

[0059] Therefore, by moving the rail support portion 87 in the vertical direction with respect to the fixing member 91, inserting the bolt 90 into any of the plurality of holes of the first support arm portion 87b, and screwing the bolt 90 into the female screw portion 92 of the first fixing arm portion 91b, the vertical position of the inner rail 48a connected to the rail support portion 87 can be adjusted. For this reason, the screen 20 can be pulled upward, so that the screen 20 can be given tension. Note that the plurality of holes of the first support arm portion 87b may be long holes extending in the vertical direction.

Explanation of Reference Numerals

[0060] 1 Roll screen device 3 Take-up box 3b Outlet 10 Take-up shaft 13a, 13b End take-up portions 15 Take-up main body portion 20 Screen 23 Engager 43A, 43B Side frames (side bars) 48a, 48b Inner rails 55A, 55B Engagement grooves 55a, 55b End faces 56a, 56b First engagement grooves (side bar side engagement grooves) 57a, 57b Third engagement grooves (take-up shaft side engagement grooves) 58a, 58b Second engagement grooves (take-up shaft side engagement grooves) Outer accommodation hole parts 59a and 59b First guide surfaces (guide surfaces) 60a and 60b Slits 61a, 61b, 75a, 75b, 79a, and 79b Inner surfaces 63a and 63b Groove formation blocks 65A and 65B First blocks 67a and 67b Second blocks 68a and 68b Attachment parts 71a and 71b Attachment holes 72 Base-end side accommodation hole parts (hole parts) 73a and 73b Third guide surfaces (guide surfaces) 74a and 74b Tip-end side accommodation hole parts (hole parts) 77a and 77b Second guide surfaces (guide surfaces) 78a and 78b Inclined surfaces 85a and 85b Rail support part 87

Claims

1. A roll screen device having a hollow take-up box, a take-up shaft rotatably supported inside the take-up box, a screen having a base end connected to the take-up shaft and a tip end led out from the take-up box to the outside, with engaging elements provided at both side ends, a pair of side rods connected to both longitudinal ends of the take-up box and extending along the leading direction of the screen, and engaging grooves extending along each of these side rods and engaging the wider engaging elements in a retaining state with respect to slits opening to the screen side, and guiding the screen through these pair of engaging grooves to open and close the screen, wherein the engaging groove has an opening at an end face on the take-up shaft side and has a guide surface partitioning the inner surface on the screen side along the side rod, wherein the slit is formed in the guide surface, wherein the guide surface includes an inclined surface inclined inward in the longitudinal direction toward the take-up shaft side at an end of the engaging groove on the take-up shaft side, characterized in that it is a roll screen device.

2. The inclined surface extends to the end face on the take-up shaft side of the engaging groove, characterized in that it is the roll screen device according to Claim 1.

3. The take-up shaft has a take-up main body portion for taking up the screen and end take-up portions protruding outward in the longitudinal direction from both longitudinal ends of the take-up main body portion for taking up the engaging elements, wherein the diameter of the end take-up portion is formed to decrease from the base end portion on the take-up main body portion side of the end take-up portion toward the tip end portion on the outside in the longitudinal direction, wherein the edge of the inclined surface extending to the end face of the engaging groove is located between the base end portion and the tip end portion of the end take-up portion, characterized in that it is the roll screen device according to Claim 2.

4. The engaging groove is formed between the guide surface and a bottom surface opposing the guide surface and has a hole portion for movably accommodating the engaging element, wherein the height of the hole portion between the inclined surface and the bottom surface is formed to gradually increase as it advances toward the take-up shaft side, characterized in that it is the roll screen device according to Claim 3.

5. A lead-out port for leading the screen out of the take-up box is formed in the take-up box, The engaging groove extends into the winding box from each of both longitudinal ends of the outlet port. The engaging groove has a side rod side engaging groove disposed on the side rod side closer to the side rod than the outlet port, and a winding shaft side engaging groove disposed closer to the winding shaft than the side rod side engaging groove and extending into the winding box. The winding shaft side engaging groove is provided so as to be position adjustable in the longitudinal direction with respect to the winding shaft. The roll screen device according to claim 4, characterized in that.

6. The side rod side engaging groove is provided in an inner rail arranged in parallel in the side rod. The winding shaft side engaging groove is provided in a groove forming block formed separately from the inner rail. The groove forming block has a long hole extending in the longitudinal direction, and by inserting a fastening member through the long hole and fastening it to the winding box or the side rod, the position with respect to the winding shaft can be adjusted. The roll screen device according to claim 5, characterized in that.

7. The groove forming block has a first block and a second block longitudinally divided along the slit of the winding shaft side engaging groove, and the opposing side surfaces of the first and second blocks are joined and integrally formed. The roll screen device according to claim 6, characterized in that.

8. The groove forming block is configured such that the engaging element provided on the tip side of the screen is positioned within the winding shaft side engaging groove in a state where all of the screen is wound around the winding shaft. The roll screen device according to claim 6, characterized in that.

9. The inner rail is connected to a rail support portion arranged in parallel in the side rod. The rail support portion is provided so as to be position adjustable in the longitudinal direction with respect to the side rod. The roll screen device according to claim 6, characterized in that.

10. The groove forming block used in the roll screen device according to any one of claims 6 to 8.

Images