Roll screen device and groove-forming block used therein

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 respect to 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, smooth opening and closing of the screen becomes difficult.

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 and a groove-forming block used therein that, in a roll screen device of the type in which both ends of the screen are guided by the engagement of an engaging element and an engaging groove, can reliably engage the engaging element with the engaging groove in a non-disengaging state when the screen is unwound from the winding shaft, even if the screen is wound up in a state of misalignment with respect to the winding shaft. [Means for solving the problem]

[0006] To solve the aforementioned problems, the roll screen device according to the present invention comprises a hollow winding box, a winding shaft rotatably supported inside the winding box, a screen whose base end is connected to the winding shaft and whose tip end is led out from the winding box to the outside, with engaging elements provided at both ends, a pair of side rods connected to both longitudinal ends of the winding box and extending along the direction in which the screen is led out, and the engaging elements extending along each of these side rods and wider than the slits that open to the screen side A roll screen device having an engagement groove for engaging a child in a non-removable state, and opening and closing the screen while guiding the screen through a pair of engagement grooves, wherein the engagement groove has an open end face on the winding shaft side and a guide surface that partitions the inner surface on the screen side along the side rod, the guide surface has the slits provided therein, and the guide surface includes an inclined surface at the end of the engagement groove on the winding shaft side that inclins inward in the longitudinal direction toward the winding shaft side.

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

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

[0009] Preferably, the winding box has an outlet for leading the screen out of the winding box, and the engagement groove extends into the winding box from each of the longitudinal ends of the outlet, and the engagement groove has a side rod side engagement groove located on the side rod side of the outlet, and a winding shaft side engagement groove located on the winding shaft side of the side rod side engagement groove and extending into the winding box, and the winding shaft side engagement groove is provided so as to be adjustable in the longitudinal direction with respect to the winding shaft. Preferably, the side rod side engagement groove is provided on an inner rail arranged in parallel within the side rod, and the winding shaft side engagement groove is provided on a groove forming block formed separately from the inner rail, and the groove forming block has an elongated hole extending in the longitudinal direction, and the position relative to the winding shaft can be adjusted by inserting a fastening member through the elongated hole and fastening it to the winding box or the side rod.

[0010] Preferably, the groove-forming block has a first block and a second block that are divided longitudinally along the slit of the winding shaft side engagement groove, and these first and second blocks are integrally formed by joining the sides of the first and second blocks that are opposite each other in the thickness direction.

[0011] Preferably, the groove-forming block is configured such that, when the entire screen is wound onto the winding shaft, the engaging element provided on the leading edge side of the screen is located within the winding shaft side engaging groove.

[0012] Preferably, the inner rail is connected to rail support portions arranged side by side within the side rod, and the rail support portions are provided so as to be adjustable in the longitudinal direction relative to the side rod.

[0013] Preferably, the groove-forming block according to the present invention is the groove-forming block used in the roll screen device. [Effects of the Invention]

[0014] The present invention provides a roll screen device and a groove-forming block used therein, which is a type of roll screen device in which both ends of the screen are guided by the engagement of an engaging element and an engaging groove. By providing a guide surface partitioned along the side rod on the screen-side inner surface of the engaging groove, opening a slit in this guide surface, and providing an inclined surface at the winding shaft-side end of the engaging groove on the guide surface that slopes longitudinally inward toward the winding shaft, it is possible to provide a roll screen device and a groove-forming block used therein that can reliably engage the engaging element with the engaging groove in a non-disengaging state when unwinding the screen from the winding shaft, even if the screen is wound in a misaligned state relative to the winding shaft. [Brief explanation of the drawing]

[0015] [Figure 1] This is a front cross-sectional view of the main part of the roller screen device according to this embodiment. [Figure 2]It is a cross-sectional plan view of a roll screen device. [Figure 3] It is a cross-sectional plan view of the main part of a roll screen device. [Figure 4] It is a longitudinal side view of a roll screen device. [Figure 5] It is a longitudinal side view of the upper main part of a roll screen device. [Figure 6] It is a longitudinal side view of the lower main part of a roll screen device. [Figure 7] It is a front view of a screen. [Figure 8] It is a perspective view of the upper groove-forming block. [Figure 9] It is a left side view of the upper groove-forming block. [Figure 10] It is an exploded perspective view of the upper groove-forming block. [Figure 11] The first block of the upper groove-forming block is shown. In the figure, (a) is the front view of the first block, (b) is the plan view of the first block, (c) is the right side view of the first block, and (d) is the back view of the first block. [Figure 12] The second block of the upper groove-forming block is shown. In the figure, (a) is the front view of the second block, (b) is the plan view of the second block, (c) is the right side view of the second block, and (d) is the back view of the second block. [Figure 13] It is a left side view of the lower groove-forming block. [Figure 14] The first block of the lower groove-forming block is shown. In the figure, (a) is the front view of the first block, (b) is the plan view of the first block, (c) is the right side view of the first block, and (d) is the back view of the second block. [Figure 15] The second block of the lower groove-forming block is shown. In the figure, (a) is the front view of the second block, (b) is the plan view of the second block, (c) is the right side view of the second block, and (d) is the back view of the second block. [Figure 16]It is a schematic diagram of the main part of a roll screen device when feeding out a screen wound in a bamboo shoot shape on a take-up shaft. [Figure 17] An example of a modified roll screen device in which an inner rail is provided so that its position can be adjusted in the vertical direction is shown.

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 for opening and closing by horizontally moving a screen 20 will be described. Note that the roll screen device is not limited to the horizontally-opening type, and may be a vertically-opening type that opens and closes by raising and lowering the screen vertically.

[0017] The roll screen device 1 includes a hollow take-up box 3, a take-up shaft 10 rotatably supported inside the take-up box 3 and rotationally biased in the screen winding direction by the biasing force of a built-in coil spring 11 (spring), a screen 20 having its base end connected to the take-up shaft 10 and its tip end led out from the take-up box 3, side frames 43A, 43B (side rods) that movably support a movable bar 30 attached to the tip end of the screen 20, and engaging grooves 55A, 55B that engage an engaging element 23 wider than these 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 in a retaining state. 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] As shown in Figures 1, 5, 6, and 8-15, the engagement grooves 55A and 55B have first to third guide surfaces 60a, 60b, 78a, 78b, 74a, and 74b that divide the inner surfaces 63a and 63b on the screen 20 side along the side frames 43A and 43B, outer housing holes 59a and 59b, base-side housing holes (holes) 73a and 73b that extend along these guide surfaces 60a-78b and movably accommodate the engaging element 23, tip-side housing holes (holes) 77a and 77b, and slits 61a-79b opened in these guide surfaces 60a-74b. The end faces 55a and 55b of the engagement grooves 55A and 55B on the winding shaft 10 side are open.

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

[0020] As shown in Figures 1-3, the roller screen device 1 includes a screen frame 40 having a pair of vertical frames 41A and 41B and a pair of side frames 43A and 43B (side rods). In this embodiment, the vertical frame 41A on the right side of the pair of vertical frames 41A and 41B is configured as a winding box 3 equipped with a winding shaft 10 for winding up the screen 20. The vertical frame 41B on the left side is configured as a receiving frame against which the movable slat 30 attached to the front of the screen 20 abuts when the screen 20 is in the open position.

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

[0022] The winding box 3 is formed with a hollow interior. In this embodiment, the winding box 3 is formed in a rectangular cylindrical shape, and an outlet 3b is provided on the rear side of the side wall 3a facing inward, extending in the vertical direction (longitudinal direction) to guide out the screen 20. The outlet 3b extends between the upper and lower parts of the side wall 3a and is formed in a rectangular shape when viewed from the side. Inside this winding box 3, the winding shaft 10 is supported so as to be rotatable around an axis L that extends in the vertical direction.

[0023] The winding shaft 10 is formed in a cylindrical shape extending in the vertical direction and has a winding body portion 15 for winding the screen 20, and end winding portions 13a and 13b that protrude vertically from both ends of the winding body portion 15 for winding the engaging elements 23 of the screen 20. In this embodiment, the end winding portions 13a and 13b are inserted into the upper and lower ends of the winding body portion 15, respectively. The diameter of the end winding portions 13a and 13b is equal to the diameter of the winding body portion 15 The sides are formed to become smaller as they move from the base end towards the tip end on the longitudinal side. In this embodiment, the portions of the end winding sections 13a and 13b that protrude from both the upper and lower ends of the winding shaft 10 are provided with winding surfaces 14a and 14b that are smaller in diameter than the winding shaft 10 and inclined toward the axis L in the outward direction of the axis L. Inside the winding shaft 10, there is a spring shaft 12 that is arranged coaxially with the winding shaft 10, with its upper end protruding from the winding shaft 10 and fixedly supported by the winding box 3. 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 winding shaft 10, and the upper end of the coil spring 11 is connected to the spring shaft 12. Therefore, the coil spring 11 unwinds the screen 20. vinegar The winding shaft 10 is twisted by the rotation of the winding shaft, accumulating winding force, and this accumulated winding force drives the winding shaft 10 to rotate, allowing the screen 20 to be automatically wound up.

[0024] A movable crossbar 30 is attached to the leading edge of the screen 20. The movable crossbar 30 extends vertically, and as shown in Figures 3-6, it is provided with receiving recesses 31a and 31b at both the upper and lower ends of the movable crossbar 30, which open outward in the vertical direction and also open at both the front and rear ends. The inner rails 48a and 48b and groove-forming blocks 65A and 65B, which will be described later, are movably housed in the receiving recesses 31a and 31b. In addition, a roller 32 is provided on the rear side of the upper end of the movable crossbar 30, which is rotatably supported around a rotation axis that extends in the front-rear direction. This roller 32 is capable of rolling on an outer rail 42 that extends along the side frame 43A, and the rolling of this roller 32 on the outer rail 42 guides the movement of the movable crossbar 30 in the left-right direction when the screen 20 is opened and closed.

[0025] As shown in Figures 3-7, the screen 20 is formed in a rectangular shape when viewed from the front, with its right end connected to the winding shaft 10 and its left end leading out from the outlet 3b of the winding box 3. Engaging members 21 are provided at both the upper and lower ends of the screen 20. The engaging member 21 comprises a mounting piece 22 connected along the sides of both the upper and lower ends of the screen 20, and a number of engaging elements 23 connected along the sides of both the upper and lower ends of the mounting piece 22. The engaging elements 23 are engaged in a locking mechanism with engagement grooves 55A and 55B (see Figures 1 and 3) extending from the side frames 43A and 43B, and move along the engagement grooves 55A and 55B when the screen 20 is opened and closed. Details of the engagement grooves 55A and 55B will be described later.

[0026] Furthermore, 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 strut 30 in a manner that prevents it from coming off (see Figure 3). The screen 20 is movable between an open state, in which the entire screen 20 is led out from the outlet 3b by moving the movable strut 30 from the winding box 3 to the left, and a closed state, in which the entire screen 20 is wound onto the winding shaft 10 by the coil spring 11 (see Figure 3). When the screen 20 is in the closed state, the right end of the movable strut 30 comes into contact with the inner side wall 3a of the winding box 3, thereby maintaining the closed state of the screen 20.

[0027] Next, we will describe the engagement grooves 55A and 55B that guide the movement of the engaging member 21 of the screen 20. First, before describing the engagement grooves 55A and 55B, we will describe the upper and lower side frames 43A and 43B on which they are provided. As shown in Figures 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, through holes 45a and 45b are provided that extend in the left-right direction and allow the upper and lower ends of the movable crossbar 30 to move through.

[0028] The rear walls 46a and 46b of the side frames 43A and 43B are provided with plate-shaped rail support sections 47a and 47b that protrude inward from the side frames 43A and 43B and extend along the side frames 43A and 43B. The rail support sections 47a and 47b extend from the left end of the side frames 43A and 43B to a position a predetermined distance in front of the right end. At both ends of these rail support sections 47a and 47b in the front-rear direction, opposing locking grooves 47a1 and 47b1 are provided, opening inward and having a hollow interior, and extending along the side frames 43A and 43B. Openings 47a2 and 47b2 are provided between these locking grooves 47a1 and 47b1, extending along the side frames 43A and 43B. 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 sections 47a and 47b. The inner rails 48a and 48b consist of a hollow rail body section 49a and 49b that protrudes from the inside to the outside of the openings 47a2 and 47b2 of the rail support sections 47a and 47b, and a pair of flange sections 50a and 50b that protrude from both sides of the upper end of the rail body section 49a and 49b. The rail body section 49a and 49b and the flange sections 50a and 50b also extend along the rail support sections 47a and 47b. The inner rails 48a and 48b are attached to the rail support sections 47a and 47b with the flange sections 50a and 50b inserted into the locking grooves 47a1 and 47b1, and the rail body section 49a and 49b protruding from the openings 47a2 and 47b2.

[0030] In this embodiment, the engagement grooves 55A and 55B, as shown in Figures 3-6, 9, and 13, include first engagement grooves (side rod side engagement grooves) 56a and 56b provided on the inner rails 48a and 48b, second engagement grooves (winding shaft side engagement grooves) 58a and 58b extending from the outlet 3b into the winding box 3, and third engagement grooves (winding shaft side engagement grooves) 57a and 57b positioned between the first engagement grooves 56a and 56b and the second engagement grooves 58a and 58b (see Figure 3).

[0031] The first engagement grooves 56a and 56b are provided inside the rail body portions 49a and 49b and have outer housing holes 59a and 59b that movably house the engaging element 23, and first guide surfaces 60a and 60b formed on the inner surface of the outer housing holes 59a and 59b on the screen 20 side. The first guide surfaces 60a and 60b are provided with slits 61a and 61b that are open on the screen 20 side.

[0032] In this embodiment, the rail body portions 49a and 49b are formed in a rectangular shape with a cross-section extending in the vertical direction, and the outer housing holes 59a and 59b are also formed in a rectangular shape with a cross-section extending in the vertical direction. The outer housing holes 59a and 59b extend along the rail body portions 49a and 49b and are open at both ends in the left and right directions. Slits 61a and 61b are provided in the front-rear center of the first guide surfaces 60a and 60b, extending along the side frames 43A and 43B. The width of the slits 61a and 61b in the front-rear direction is greater than the thickness of the mounting piece portion 22 and narrower than the width of the engaging element 23, so as to engage the engaging element 23 in a non-detachable state.

[0033] The ends of the inner rails 48a and 48b on the winding box 3 side are positioned with a gap 62a and 62b to the left from the inner side wall 3a of the winding box 3 (see Figure 3). For this reason, the ends of the first engagement grooves 56a and 56b on the winding box 3 side are also positioned inward from the side wall 3a in the left-right direction. Groove-forming blocks 65A and 65B, which are provided with the third engagement grooves 57a and 57b and the second engagement grooves 58a and 58b, are arranged within this gap 62a and 62b (see Figure 1). The groove-forming blocks 65A and 65B are attached to the side frames 43A and 43B with their ends on the winding shaft 10 side inserted from the outlet 3b.

[0034] As shown in Figures 1, 5, 6, and 8-15, the groove-forming blocks 65A and 65B are formed in a plate-like shape that extends in the left-right direction and has a thin thickness in the front-back direction (see Figures 1 and 8). In this embodiment, the groove-forming blocks 65A and 65B are integrally formed with the first blocks 67a and 67b and the second blocks 68a and 68b, which are divided vertically along the slits 79a, 79b, 75a and 75b of the second and third engagement grooves 58a, 58b, 57a and 57b, 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 (winding shaft 10 side) of the groove-forming blocks 65A and 65B, protruding portions 70a and 70b are formed that project outward in the direction of the axis L and extend in the left-right direction (see Figures 1 and 8). On the left side of the groove-forming blocks 65A and 65B (first blocks 67a and 67b), mounting portions 71a and 71b are formed that project outward in the direction of the axis L and extend in the left-right direction. The mounting portion 71a of the groove-forming block 65A is provided with an elongated mounting hole 72 that extends in the vertical direction, and the mounting portion 71b of the groove-forming block 65B is provided with a circular hole 83. By fastening fastening means such as bolts inserted through these mounting holes 72 and 83 to support plate portions 4a and 4b that project from the inner surfaces of both the upper and lower ends of the winding box 3, the groove-forming block 65A is mounted to the winding box 3 so that its position can be adjusted in the vertical direction, and the groove-forming block 65B is fixedly mounted to the winding box 3. Note that the groove-forming blocks 65A and 65B are not limited to being attached to the winding box 3, but may also be attached to the side frames 43A and 43B. Details on adjusting the vertical position of the groove-forming block 65A will be described later.

[0036] Furthermore, as shown in Figures 3, 5, and 6, the width of the groove-forming blocks 65A and 65B in the front-rear direction is such that they can be accommodated within the receiving recesses 31a and 31b provided at both the upper and lower ends of the movable strut 30 when the screen 20 is closed. Therefore, when the screen 20 is closed, the groove-forming blocks 65A and 65B are accommodated within the receiving recesses 31a and 31b of the movable strut 30, so the movable strut 30 does not come into contact with the groove-forming blocks 65A and 65B.

[0037] Next, the internal structure of the groove-forming blocks 65A and 65B will be described. As shown in Figure 1, the second and third engagement grooves 57a, 57b, 58a, and 58b have second and third guide surfaces 78a, 78b, 74a, and 74b provided on the inner surfaces 63a, and 63b formed on the inside of the groove-forming blocks 65A and 65B, slits 79a, 79b, 75a, and 75b (see Figures 8, 9, and 13) formed in these guide surfaces 78a-74b, and base-end and tip-end accommodating holes 73a, 73b, 77a, and 77b (holes, see Figures 8, 9, and 14) formed between these guide surfaces 78a-74b and the bottom surfaces 64a, and 64b facing them, which movably accommodate the engaging element 23. Specifically, third engagement grooves 57a and 57b are formed within the left end of groove-forming blocks 65A and 65B, and second engagement grooves 58a and 58b are formed within the right end of groove-forming blocks 65A and 65B. These engagement grooves 57a, 57b, 58a, and 58b extend along the left-right direction and communicate with each other. The second engagement grooves 58a and 58b open at the right end of groove-forming blocks 65A and 65B, and the third engagement grooves 57a and 57b open at the left end of groove-forming blocks 65A and 65B.

[0038] As shown in Figures 8-15, the third engagement grooves 57a and 57b extend from the left end faces of the groove-forming blocks 65A and 65B toward the right to a position near the left end of the protrusions 70a and 70b. The third 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 base end housing holes 73a and 73b extend in the left-right direction between the third guide surfaces 74a and 74b and the bottom surfaces 64a and 64b opposite them. In this embodiment, the base end housing holes 73a and 73b have a rectangular cross-section in the vertical direction and are formed in a rectangular parallelepiped shape extending in the left-right direction. Since the size of the base end housing holes 73a and 73b is larger than that of the engaging element 23, the engaging element 23 can move freely within the base end housing holes 73a and 73b. Furthermore, the left ends of the base-side housing holes 73a and 73b are open.

[0039] In the central part of the third guide surfaces 74a and 74b in the front-rear direction, slits 75a and 75b are provided, with the screen 20 side opening and extending along the third guide surfaces 74a and 74b. The left ends of these slits 75a and 75b open into the left end faces of the groove forming blocks 65A and 65B, and the right ends of the slits 75a and 75b communicate with the slits 79a and 79b of the second engagement grooves 58a and 58b. Furthermore, the slits 75a and 75b are configured to engage the engaging element 23 in a non-detachable state. That is, the width of the slits 75a and 75b is greater than that of the mounting piece 22 and narrower than that of the engaging element 23.

[0040] Furthermore, the base end receiving holes 73a, 73b and the slits 75a, 75b are in communication with the outer receiving holes 59a, 59b and the slits 61a, 61b of the first engagement grooves 56a, 56b, regardless of the vertical position adjustment of the groove forming blocks 65A, 65B.

[0041] Next, the second engagement grooves 58a and 58b will be described. The second engagement grooves 58a and 58b extend into the winding box 3 from both the upper and lower ends of the outlet 3b (see Figures 1 and 2). The second engagement grooves 58a and 58b have a tip-side housing hole portion 77a, 77b that extends along the left-right direction and movably accommodates the engaging element 23, a second guide surface (guide surface) 78a, 78b that partitions the inner surface 63a, 63b of the tip-side housing hole portion 77a, 77b on the screen 20 side along the tip-side housing hole portion 77a, 77b, and slits 79a, 79b that are opened in the second guide surface 78a, 78b and open on the screen 20 side.

[0042] The tip-side housing holes 77a and 77b are connected to the ends of the base-side housing holes 73a and 73b on the winding shaft 10 side and extend linearly toward the winding shaft 10 side. Furthermore, the vertical (up and down) height of the tip-side housing holes 77a and 77b gradually increases as they proceed toward the winding shaft 10 side. For this reason, the right-side edges of the tip-side housing holes 77a and 77b are widely open at the right-side end faces 55a and 55b of the groove-forming blocks 65A and 65B. The size of the tip-side housing holes 77a and 77b is larger than the engaging element 23, and is large enough for the engaging element 23 to move freely.

[0043] The second guide surfaces 78a and 78b are formed in a planar shape that is inclined inward in the axial direction L toward the winding shaft 10, and include inclined surfaces 85a and 85b that are inclined inward in the axial direction L toward the winding shaft 10. In this embodiment, the inclined surfaces 85a and 85b extend between both ends in the extension direction of the second guide surfaces 78a and 78b, and also extend to the end faces 55a and 55b of the engagement grooves 55A and 55B on the winding shaft 10 side. Furthermore, the inclined surfaces at the end faces 55a and 55b of the engagement grooves 55A and 55B 85a The edge of 85b is located between the base end and the tip end of the end winding sections 13a and 13b. In this embodiment, the edges of the inclined surfaces 85a and 85b are positioned close to the base ends of the end winding sections 13a and 13b (see Figure 1).

[0044] Slits 79a and 79b are provided in the center of the second guide surfaces 78a and 78b in the front-rear direction, with the screen 20 side opening. These slits 79a and 79b extend along the second guide surfaces 78a and 78b, and the left ends of the slits 79a and 79b communicate with the slits 75a and 75b of the third engagement grooves 57a and 57b, and also open to the left end faces of the protrusions 70a and 70b. Furthermore, the ends of the slits 79a and 79b on the winding shaft 10 side are open. In addition, the slits 79a and 79b are configured to engage the engaging element 23 in a retaining state. That is, the width of the slits 79a and 79b is greater than the thickness of the mounting piece 22, and narrower than the width of the engaging element 23.

[0045] The tip-side housing holes 77a and 77b communicate with the base-side housing holes 73a and 73b of the third engagement grooves 57a and 57b. The left edge of the second guide surfaces 78a and 78b of the second engagement grooves 58a and 58b is connected to the right end of the third guide surfaces 74a and 74b of the third engagement grooves 57a and 57b. In this embodiment, the edges of the inclined surfaces 85a and 85b on the winding shaft 10 side are positioned close to the outermost surface of the screen 20 when the entire screen 20 is wound onto the winding shaft 10 (closed state) (see Figure 3). Furthermore, the groove-forming blocks 65A and 65B are configured such that when the screen 20 is in the closed state, the front-end engaging element 23a (engaging element) provided on the front end of the screen 20 is positioned within the second and third engaging grooves 58a, 58b, 57a, and 57b (engaging grooves) (see Figure 16). Therefore, when the screen 20 is extended, the front-end engaging element 23a can be reliably engaged with the slits 79a and 79b in a non-detachable state.

[0046] As shown in Figures 8-15, the groove-forming blocks 65A and 65B configured in this way are made up of first blocks 67a, 67b and second blocks 68a, 68b, which are split in half (hereinafter referred to as "half-split") with respect to a virtual surface 76 that extends in the vertical direction (up and down direction) through the slits 75a, 75b, 79a, 79b of the third engagement grooves 57a, 57b and the second engagement grooves 58a, 58b, respectively.

[0047] As shown in Figures 10 and 11, the first block 67a of the groove-forming block 65A is formed in a plate shape extending in the left-right direction. A half-split projection 70a is formed at the right end of the first block 67a, and a mounting portion 71a is formed at the upper left side of the first block 67a. The mounting portion 71a is provided with an elongated mounting hole 72.

[0048] In the first block 67a, the lower part of the inner upper end surface 81a has halved tip-side and base-side communicating movable holes 77a, 73a, and second and third guide surfaces 78a, 74a. These structures have been described above, so their explanation will be omitted. Two holes 69 located above the tip-side and base-side accommodating holes 77a, 73a in the first block 67a are in communication with two holes 69 located in the second block 68a. By fastening fasteners such as bolts inserted through these holes 69, these blocks are connected. 67a, 68a The components are fixed together. The lower end surface 80a of the first block 67a, which extends downward from the second and third guide surfaces 78a and 74a, is positioned parallel to the rearward side relative to the upper end surface 81a. In this embodiment, the amount of rearward displacement of the lower end surface 80a relative to the upper end surface 81a is equivalent to half the width t of the slits 75a and 79a (see Figure 9).

[0049] The differences between the second block 68a of groove-forming block 65A and the first block 67a will be explained, and parts identical to those of the first block 67a will be denoted by corresponding reference numerals and their explanations will be omitted. As shown in Figures 10 and 12, the mounting portion 71a and mounting hole 72 formed on the first block 67a are not formed on the upper left side of the second block 68a. The inner end face of the second block 68a has accommodating holes 77a and 73a on the tip and base sides of the split second and third engagement grooves 58a and 57a, and second and third guide surfaces 78a and 74a. The inner lower end face 80b (see Figure 12) of the second block 68a, which extends downward from the second and third guide surfaces 78a and 74a, is positioned parallel to the front side relative to the upper end face 81b. In this embodiment, the amount of forward displacement of the lower end surface 80b relative to the upper end surface 81b is equivalent to half the width t of the slits 75a and 79a (see Figure 9).

[0050] On the other hand, the first and second blocks 67b and 68b constituting the groove-forming block 65B are formed vertically symmetrically with the first and second blocks 67a and 68a of the groove-forming block 65A described above, as shown in Figures 13-15. For this reason, in the groove-forming block 65B, the same reference numerals are used for parts that are identical to those of the groove-forming block 65A, and their descriptions are omitted. The differences from the groove-forming block 65A will be explained.

[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. Therefore, the groove-forming block 65B is fixed to the winding box 3 by fastening fastening means such as bolts inserted through the holes 83, 83 provided in the first and second blocks 67b, 68b. Note that the hole 83 of the groove-forming block 65B may be an elongated mounting hole 72 extending in the vertical direction so that its position can be adjusted vertically relative to the winding box 3. Note that the second block 68b is formed vertically symmetrically with the second block 68a (see Figure 12), so its description is omitted.

[0052] A method for attaching the groove-forming blocks 65A and 65B, configured in this way, to the winding box 3 will now be described. First, with the screen 20 extended outwards from the outlet 3b (see Figure 16), the first blocks 67a and 67b are positioned behind the engaging element 23 on the outside of the outlet 3b, and the second blocks 68a and 68b are positioned in front of the engaging element 23. Then, the inner end faces of the first and second blocks 67a, 68a, 67b, and 68b, which are positioned opposite each other on both the front and rear sides with the engaging element 23 in the center, are brought into contact with each other. As a result, the engaging element 23 is housed in the tip and base end housing holes 77a, 77b, 73a, and 73b, and the mounting piece 22 is housed in the slits 79a, 79b, 75a, and 75b. Finally, the first and second blocks 67a-68b are integrally joined together with bolts inserted through the holes 69. Therefore, the engaging element 23 is engaged with the slits 79a-75b in a non-removable state. Then, with the ends 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 unwinding a screen 20 that has been wound onto the winding shaft 10 with a winding misalignment will be explained. As shown in Figure 16, when the screen 20 is wound onto the winding shaft 10 with a winding misalignment, moving the movable slat 30 away from the winding shaft 10 (to the left) causes the screen 20 to be unwinded from the winding shaft 10. At the same time, among the numerous engaging elements 23 provided on both ends of the screen 20, the engaging element 23 located at the tip in the screen unwinding direction (hereinafter referred to as "tip-side engaging element 23a") moves along the third guide surfaces 74a, 74b in the screen unwinding direction while being held in place against the slits 75a, 75b of the third engaging grooves 57a, 57b.

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

[0055] Then, as the inner winding engager 23b moves along the third guide surface 74a, the screen 20 moves while being displaced outward in the direction of the axis L. Therefore, the winding misalignment of the screen 20, which is wound in a bamboo shoot shape around the winding shaft 10, can be eliminated.

[0056] Furthermore, if the screen 20 is misaligned while wound onto the winding shaft 10, the engaging element 23 of the screen 20 can be reliably engaged with the engaging grooves 55A and 55B by adjusting the mounting positions of the groove forming blocks 65A and 65B.

[0057] In the embodiment described above, the rail support portion 47a that supports the inner rail 48a is shown to be formed integrally with the side frame 43A, but it is not limited to this. As shown in Figure 17, the rail support portion 87 may be formed separately from the side frame 43A and may be provided so as to be adjustable in the vertical direction. The rail support portion 87 according to this modified example has a support portion body 87a that supports the inner rail 48a, and two plate-shaped first support arm portions 87b and second support arm portions 87c that protrude upward from both the front and rear ends of the support portion body 87a and extend along the inner rail 48a. At both the left and right ends of the front first support arm portion 87b of these first and second support arm portions 87b and 87c, there are a number of holes (not shown) that are spaced apart in the vertical direction and through which the shaft portion of a bolt 90 is inserted.

[0058] A fixing member 91 for fixing the rail support 87 is attached to the inner surface of the top plate 43a of the side frame 43A. The fixing member 91 is arranged side by side on the top plate 43a and has a fixing member body 91a fixed to the top plate 43a, and two plate-shaped first fixing arm portion 91b and second fixing arm portion 91c extending downward from both the front and rear ends of the fixing member body 91a. Female threaded portions 92 into which bolts 90 can be screwed are provided at both the left and right ends of the front first fixing arm portion 91b of these first and second fixing arm portions 91b and 91c. In this modified example, the female threaded portions 92 are provided at the lower end of the first fixing arm portion 91b.

[0059] Therefore, by moving the rail support portion 87 vertically relative to the fixing member 91, and inserting a bolt 90 into one of the multiple holes in the first support arm portion 87b, the bolt 90 can be screwed into the female thread portion 92 of the first fixing arm portion 91b, thereby adjusting the vertical position of the inner rail 48a connected to the rail support portion 87. As a result, the screen 20 can be pulled upward, giving the screen 20 tension. Note that the multiple holes in the first support arm portion 87b may be elongated holes extending in the vertical direction. [Explanation of Symbols]

[0060] 1. Roller screen device 3 Reel Box 3b Outlet 10 reel spindles 13a, 13b End winding section 15 Winding body 20 screens 23 Engagement element 43A,43B Side frame (side rod) 48a, 48b Inner rail 55A,55B Engagement groove 55a,55b end face 56a, 56b First engagement groove (side rod side engagement groove) 57a, 57b Third engagement groove (winding shaft side engagement groove) 58a, 58b Second engagement groove (winding shaft side engagement groove) 59a, 59b Outer accommodation hole 60a, 60b First guide surface (guide surface) 61a, 61b, 75a, 75b, 79a, 79b Slit 63a, 63b Inner surface 65A, 65B Groove-forming blocks 67a, 67b Block 1 68a, 68b Block 2 71a, 71b Mounting section 72 mounting holes 73a, 73b Base end side receiving hole (hole) 74a, 74b Third guide surface (guide surface) 77a, 77b End-side housing hole (hole) 78a, 78b Second guide surface (guide surface) 85a,85b Slope 87 Rail support section

Claims

1. A roll screen device comprising: a hollow winding box; a winding shaft rotatably supported inside the winding box; a screen whose base end is connected to the winding shaft and whose tip end is led out from the winding box to the outside, with engaging elements provided at both ends; a pair of side rods connected to both longitudinal ends of the winding box and extending along the direction in which the screen is led out; and engaging grooves extending along each of the side rods, which engage the wider engaging elements with slits opening to the screen side in a locking state, wherein the screen is opened and closed while being guided by the pair of engaging grooves, The engagement groove has an open end face on the winding shaft side and a guide surface that divides the inner surface on the screen side along the side rod. The guide surface has the slit provided therein. The guide surface includes an inclined surface at the end of the engagement groove on the winding shaft side that slopes inward in the longitudinal direction toward the winding shaft side. The inclined surface extends to the end face of the engagement groove on the winding shaft side, The winding shaft has a winding body portion for winding the screen, and end winding portions that protrude outward in the longitudinal direction from each of the longitudinal ends of the winding body portion for winding the engaging element. The diameter of the end winding portion is formed to decrease from the base end of the end winding portion on the winding body side toward the tip end on the longitudinal side. The edge of the inclined surface extending to the end face of the engagement groove is located between the base end and the tip of the end winding portion. A roller screen device characterized by the following features.

2. The engagement groove is formed between the guide surface and the bottom surface opposite it, and has a hole for movably accommodating the engaging element. The height of the hole between the inclined surface and the bottom surface is formed to gradually increase as it progresses toward the winding shaft. The roller screen device according to feature 1.

3. The winding box is provided with an outlet for leading the screen out of the winding box to the outside. The engagement grooves extend into the winding box from each of the longitudinal ends of the outlet, The engagement groove comprises a side rod engagement groove located on the side rod side of the outlet, and a winding shaft engagement groove located on the winding shaft side of the side rod engagement groove and extending into the winding box. The winding shaft side engagement groove is provided so as to be positionable in the longitudinal direction relative to the winding shaft. The roller screen device according to feature 2.

4. The aforementioned side rod engagement groove is provided in the inner rail which is arranged side by side within the side rod. The winding shaft side engagement groove is provided in a groove-forming block that is formed separately from the inner rail. The groove-forming block has an elongated hole extending in the longitudinal direction, and its position relative to the winding shaft can be adjusted by inserting a fastening member through the elongated hole and fastening it to the winding box or the side rod. The roller screen device according to feature 3.

5. The groove-forming block has a first block and a second block that are divided vertically along the slit of the winding shaft side engagement groove, and these first and second blocks are integrally formed by joining their opposing sides together. The roller screen device according to feature 4.

6. The groove-forming block is configured such that, when the entire screen is wound onto the winding shaft, the engaging element provided on the leading edge side of the screen is located within the winding shaft side engaging groove. The roller screen device according to feature 4.

7. The inner rail is connected to rail support parts arranged side by side within the side rod. The rail support portion is provided so as to be adjustable in the longitudinal direction relative to the side rod. The roller screen device according to feature 4.

8. The groove-forming block used in the roller screen device according to any one of claims 4 to 6.

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