Suspension structure of the winding part of the opening / closing mechanism

Abstract

To provide a hinge-side structure of an opening / closing body roll-up section configured to reduce material cost, realize fire preventive structure, and facilitate assembling.SOLUTION: A hinge-side structure of an opening / closing body roll-up section connects a shutter curtain 15 which opens / closes a building opening 13 and a roll-up shaft 17 for rolling up the shutter curtain 15, with a screw 19. The roll-up shaft 17 has a connection groove 49 along an axial line on an outer periphery 51 and formed as a hollow pipe by roll forming. The connection groove 49 has a pair of ribs 59 for reducing a groove width, formed in a pair of groove edges facing each other across the groove width. A connection body 63 for exposing a fastening hole 61 between the ribs 59 is inserted into the connection groove 49. Falling of the connection body 63 from the connection groove 49 is regulated by the pair of ribs 59, and the connection body freely moves in a direction along the axial line. In the connection body 63, a hinge-side member 45 of the shutter curtain 15 is fixed with the screw 19 that penetrates through the hinge-side member 45 to be fastened into the fastening hole 61.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a suspension structure of an opening / closing body winding section.

Background Art

[0002] In an opening / closing body suspension structure in which an opening / closing body for opening and closing an opening of a building is attached to the outer periphery of a winding shaft that winds up the opening / closing body via a suspension member, on the outer periphery of the winding shaft, engaging protrusions that are continuous along the axial direction thereof are integrally formed and protrude, and a suspension member is locked in a state where a hook portion formed on the suspension member is hooked on the engaging protrusions, and a screw that penetrates the suspension member is screwed and fixed to an aluminum winding shaft. An opening / closing body suspension structure characterized by this is known (see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, conventional winding shafts used in suspension structures are constructed from a single extruded pipe made of aluminum, which has good formability. Because they are sufficiently thick to provide rigidity, they have a somewhat high manufacturing cost. Furthermore, when the opening / closing mechanism is designed to be fire-resistant, the aluminum winding shaft may soften and melt due to the heat of a fire. For these reasons, there is a demand for winding shafts made of steel. However, while aluminum winding shafts have a wall thickness of 2-3 mm, allowing the suspension member to be directly screwed to the winding shaft, a steel winding shaft has a wall thickness of only about 0.4 mm, making it difficult to secure sufficient thread engagement and thus insufficient fixing strength. Moreover, increasing the plate thickness of a steel winding shaft to ensure sufficient thread engagement unnecessarily increases its weight, requiring a larger opening / closing mechanism. In other words, while this is feasible for shutter devices installed in large openings, it is not feasible for small, lightweight shutter devices such as window shutters installed in residential windows. Furthermore, in the case of a thin winding shaft, it is conceivable to use nuts and screws (bolts) to ensure fixing strength, but this presents problems in terms of nut placement and screwing work, as the screws (bolts) passed through from the outside must be screwed into nuts located on the inside of the winding shaft, which are difficult to see.

[0005] This invention has been made in view of the above circumstances, and its purpose is to provide a suspension structure for an opening / closing body winding section that can reduce material costs, realize a fire-resistant structure, and facilitate assembly work. [Means for solving the problem]

[0006] Next, means for solving the above-mentioned problems will be described with reference to drawings corresponding to the embodiments. The suspension structure for the winding mechanism of an opening / closing body according to claim 1 of the present invention is a suspension structure for the winding mechanism of an opening / closing body that connects an opening / closing body 15 that opens and closes an opening 13 of a building and a winding shaft 17 that winds up the opening / closing body 15 with a fastening member 19, The winding shaft 17 has a connecting groove 49 along its axis on its outer surface 51, The edges of both ends of the board were joined together. Formed as a hollow pipe, The connecting groove 49 has a pair of ribs 59 formed by folding and crushing the groove edges, which are opposite each other across the groove width and extend in a direction that narrows the groove width, and each is folded back in opposite directions. A connecting body 63 is inserted into the connecting groove 49, exposing fastening holes 61 between the pair of ribs 59. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is movable in the direction along the axis. The connecting body 63 is secured to the opening / closing body 15 by the fastening member 19 which penetrates the opening / closing body 45 and fastens to the fastening hole 61. 、 The connecting body 63 has a groove outer plate portion 65 positioned on the outside of the connecting groove 49 with the rib 59 in between, and a groove inner plate portion 67 positioned on the inside of the connecting groove 49 with the rib 59 in between. The outer groove plate portion 65 and the inner groove plate portion 67 are integrally formed in a U-shape via a bent portion 69. The outer groove plate portion 65 has a through hole 71, and the inner groove plate portion 67 has a fastening hole 61 formed coaxially with the through hole 71. When the fastening member 19 is fastened into the fastening hole 61, the outer clamping portion 73 formed on the outer groove plate portion 65 and the inner clamping portion 75 formed on the inner groove plate portion 67 clamp the rib 59 from both the inside and outside in the radial direction of the winding shaft 17. It is characterized by the following.

[0007] In this suspension structure for the winding mechanism of the opening / closing body, the winding shaft 17 is made into a hollow pipe by roll forming. The hollow pipe is formed, for example, by folding the edges of both ends of a plate material 51 in opposite directions and joining them together, then flattening the overlapping portion in the thickness direction of the plate. The winding shaft 17 is obtained by roll forming and has a connecting groove 49 along its axis on its outer surface 51. The connecting groove 49 has a pair of ribs 59 formed by a pair of groove edges facing each other across the groove width, which extend in a direction that narrows the groove width, and then are folded back in opposite directions and flattened. In other words, the connecting groove 49 is formed as a groove that widens at the back, with the groove width at the groove edges being narrower than at the bottom of the groove. A connecting body 63 for exposing a fastening hole 61 between a pair of ribs 59 is inserted into the connecting groove 49. The connecting body 63 is regulated from falling off from the connecting groove 49 by the pair of ribs 59 and is movable in the direction along the axis. That is, the connecting body 63 can be freely positioned according to the fixing position of the suspension member 45 of the opening / closing body 15. The suspension member 45 of the opening / closing body 15 is fixed to the connecting body 63 by a fastening member 19 that penetrates the suspension member 45 and is fastened to the fastening hole 61. In the suspension structure of the opening / closing body winding portion as described above, even in the case of the winding shaft 17 made of a thin plate material, the connecting body 63 can be inserted into the connecting groove 49 provided on the outer peripheral surface 51 of the winding shaft 17 while being prevented from coming off, and the suspension member 47 of the opening / closing body 15 can be easily fastened to the connecting body 63 with sufficient fixing strength. As a result, the suspension structure of the opening / closing body winding portion can replace the expensive aluminum material with an inexpensive steel material. By making the winding shaft 17 made of steel, the fire resistance can be improved as compared with the aluminum-made one. Further, since the fastening member 19 can be fastened from the outer peripheral side of the winding shaft 17, there is no need to arrange a nut inside the winding shaft 17, and the fastening operation can be easily and quickly performed with a simple structure.

[0008] Furthermore, in the suspension structure of this opening / closing winding section, a connecting body 63 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 63 is integrally formed such that an outer groove plate portion 65, which is positioned outside the connecting groove 49 with the rib 59 in between, and an inner groove plate portion 67, which is positioned inside the connecting groove 49 with the rib 59 in between, are bent into a U-shape via a bent portion 69. The connecting body 63 has a through hole 71 in the outer groove plate portion 65 through which the fastening member 19 passes, and a fastening hole 61 in the inner groove plate portion 67 for fastening the fastening member 19. In addition, an outer clamping portion 73 is formed on the outer side of the groove of the rib 59, and an inner clamping portion 75 is formed on the inner side of the groove of the rib 59, which is located inside the groove of the rib 59. A screw, which is a fastening member 19 that penetrates the suspension member 45, is fastened to the fastening hole 61 of the connecting body 63 inserted into the connecting groove 49. Before the fastening member 19 is fastened, the connecting body 63 can move freely along the connecting groove 49. In other words, the connecting body 63 can be freely positioned and adjusted to match the fixed position of the suspension member 45 of the opening / closing body 15. Meanwhile, when the screw that has passed through the suspension member 45 passes through the through hole 71 in the groove outer plate portion 65 and is fastened to the fastening hole 61 in the groove inner plate portion 67, the U-shaped bent portion 69 deforms, and the groove inner plate portion 67 is pulled towards the groove outer plate portion 65. As a result, the connecting body 63, with its outer clamping portion 73 on the groove outer plate portion 65 and its inner clamping portion 75 on the groove inner plate portion 67, clamps the pair of ribs 59 from both the inside and outside of the winding shaft 17, restricting the axial movement of the winding shaft 17 and fixing it to the winding shaft 17. At the same time, the opening and closing body 15 is also fixed to the winding shaft 17 via the connecting body 63, with the suspension member 45 being fixed to the winding shaft 17. In this suspension structure for the winding section of the opening / closing body, the suspension member 45 of the opening / closing body 15 can be quickly and easily fixed to a desired position on the winding shaft 17 with a simple structure, simply by fastening the fastening member 19 to the connecting body 63.

[0009] The suspension structure for the winding mechanism of an opening / closing body according to claim 2 of the present invention is a suspension structure for the winding mechanism of an opening / closing body that connects an opening / closing body 15 that opens and closes an opening 13 of a building and a winding shaft 17 that winds up the opening / closing body 15 with a fastening member 19, The winding shaft 17 has a connecting groove 49 along its axis on its outer surface 51 and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove 49 has a pair of ribs 59 formed by folding and crushing the groove edges, which are opposite each other across the groove width and extend in a direction that narrows the groove width, and each is folded back in opposite directions. A connecting body 63 is inserted into the connecting groove 49, exposing fastening holes 61 between the pair of ribs 59. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is movable in the direction along the axis. The connecting body 63 is fixed to the opening / closing body 15 by the fastening member 19 which passes through the opening / closing body 45 and fastens to the fastening hole 61. The connecting body 77 has an outer groove plate portion 65 positioned outside the connecting groove 49 and an inner groove plate portion 67 positioned inside the connecting groove 49. The grooved outer plate portion 65 has the fastening hole 61 in a protruding portion 79 that protrudes from the outer circumferential surface 51 of the winding shaft 17. The groove inner plate portion 67 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is provided at both longitudinal ends of the groove outer plate portion 65, and is formed as a protruding leg plate with a dimension approximately the same as the groove width of the connecting groove 49. The connecting body 77 is characterized in that the suspension member 45 of the opening / closing body 15 is fixed to the connecting body 77 by the fastening member 19 which passes through the suspension member 45 and fastens to the fastening hole 61.

[0010] In this suspension structure for the winding mechanism of the opening / closing body, a connecting body 77 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. Before the fastening member 19 is fastened, the connecting body 77 can move freely along the connecting groove 49. In other words, the connecting body 77 can be freely positioned to match the fixed position of the suspension member 45 of the opening / closing body 15. The connecting body 77 has an outer groove plate portion 65 positioned outside the connecting groove 49 and an inner groove plate portion 67 positioned inside the connecting groove 49. The outer groove plate portion 65 has a projection 79 that protrudes from the outer circumferential surface 51 of the winding shaft 17, and fastening holes 61 are formed in this projection 79. The connecting body 77 is prevented from falling out of the connecting groove 49 by a pair of ribs 59 that prevent the inner groove plate portion 67 from coming out of the connecting groove 49. A fastening member 19, which passes through the suspension member 45, is fastened to the protruding portion 79 of the outer groove plate portion 65 that is prevented from coming out of the connecting groove 49. As a result, the opening and closing body 15 is fastened to the connecting body 77, which is prevented from coming out of the connecting groove 49, and is fixed to the winding shaft 17 via this connecting body 77. In this suspension structure for the winding section of the opening / closing body, the suspension member 45 of the opening / closing body 15 can be quickly and easily fixed to a desired position on the winding shaft 17 with a simple structure, simply by fastening the fastening member 19 to the connecting body 77. Furthermore, in this suspension structure for the winding mechanism, the fastening member 19 is fastened to the protruding portion 79 of the outer groove plate portion 65, which is located outside the connecting groove 49, and only the inner groove plate portion 67 is positioned inside the connecting groove 49. In other words, the depth of the connecting groove 49 can be made shallow. Also, by positioning the inner groove plate portion 67 in the connecting groove 49, a space equivalent to the length of the screw can be secured. This space is set to a length that allows fastening to be completed before the tip of the screw reaches the bottom surface of the connecting groove 49. In this suspension structure for the winding mechanism of the opening / closing body, even when the screws are fastened, the tips of the screws do not come into contact with the bottom of the connecting groove 49, allowing the connecting groove 49 to be formed to the minimum necessary depth. As a result, the winding shaft 17 can accommodate a wheel 41 with a larger outer diameter.

[0011] The suspension structure of the opening / closing body winding part according to claim 3 of the present invention is A suspension structure for an opening / closing body winding section, which connects an opening / closing body 15 that opens and closes an opening 13 of a building and a winding shaft 17 that winds up the opening / closing body 15 with a fastening member 19, The winding shaft 17 has a connecting groove 49 along its axis on its outer surface 51 and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove 49 has a pair of ribs 59 formed by folding and crushing the groove edges, which are opposite each other across the groove width and extend in a direction that narrows the groove width, and each is folded back in opposite directions. A connecting body 63 is inserted into the connecting groove 49, exposing fastening holes 61 between the pair of ribs 59. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is movable in the direction along the axis. front The connecting body 63 is fixed to the opening / closing body 15 by the fastening member 19 which passes through the opening / closing body 45 and fastens to the fastening hole 61. The connecting body 81 is formed in the shape of a long strip along the axis, and is positioned inside the connecting groove 49, with its detachment from the connecting groove 49 being restricted by the pair of ribs 59. The connecting body 81 has a slit 83 along the longitudinal direction, which is the fastening hole 61, exposed between the pair of ribs 59. The connecting body 81 is fixed to the opening / closing body 15 by the fastening member 19 which penetrates the hanging member 45 and screws into the slit 83, and the screwing of the fastening member 19 widens the spacing of the slit 83, causing the width of the connecting body 81 within the connecting groove 49 to be widened and deformed to be equal to the inner width of the connecting groove 49. characterized by.

[0012] In this suspension structure for the winding part of the opening / closing body, a connecting body 81 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 81 is formed in the shape of a long strip along its axis, and is positioned inside the connecting groove 49, with a pair of ribs 59 preventing it from falling out of the connecting groove 49. Before the fastening member 19 is fastened, the connecting body 81 can move freely along the connecting groove 49. In other words, the connecting body 81 can be freely positioned to match the fixed position of the suspension member 45 of the opening / closing body 15. The connecting body 81 has a slit 83 formed along its longitudinal direction, which serves as a fastening hole 61. The slit 83 is exposed between a pair of ribs 59. The width of the slit 83 is smaller than the outer diameter of the screw that is the fastening member 19, allowing the screw to be threaded. The opening / closing body 15 is fixed to the connecting body 81 by a screw that passes through the suspension member 45 and fastens to the slit 83. At this time, the screw is screwed into the longitudinal center of the slit 83 on the connecting body 81. Since the spacing width of the slit 83 is smaller than the outer diameter of the screw, when the screw is screwed into the connecting body 81, the spacing width of the slits is widened, and the longitudinal center is expanded outward. The connecting body 81 is deformed to widen so that the width of the outwardly expanded longitudinal center is equal to the inner width of the connecting groove 49, and presses against the opposing groove inner surface 87 of the connecting groove 49. Furthermore, as the screw that has passed through the suspension member 45 tightens into the slit 83, the connecting body 81 is pulled closer. As a result, the connecting body 81 sandwiches the pair of ribs 59 between the suspension member 45 and the winding shaft 17 from both the inside and outside directions, restricting the axial movement of the winding shaft 17 and fixing it to the winding shaft 17. At the same time, the opening and closing body 15 is also fixed to the winding shaft 17 via the connecting body 81 through the suspension member 45. In this suspension structure for the winding mechanism of the opening / closing body, the suspension member 45 of the opening / closing body 15 can be quickly and easily fixed to a desired position on the winding shaft 17 with a simple structure, simply by fastening screws to the slit 83.

[0013] The suspension structure of the opening / closing body winding part according to claim 4 of the present invention is A suspension structure for an opening / closing body winding section, which connects an opening / closing body 15 that opens and closes an opening 13 of a building and a winding shaft 17 that winds up the opening / closing body 15 with a fastening member 19, The winding shaft 17 has a connecting groove 49 along its axis on its outer surface 51 and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove 49 has a pair of ribs 59 formed by folding and crushing the groove edges, which are opposite each other across the groove width and extend in a direction that narrows the groove width, and each is folded back in opposite directions. A connecting body 63 is inserted into the connecting groove 49, exposing fastening holes 61 between the pair of ribs 59. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is movable in the direction along the axis. The connecting body 63 is fixed to the opening / closing body 15 by the fastening member 19 which passes through the opening / closing body 45 and fastens to the fastening hole 61. The connecting body 89 is formed in the shape of a long strip along the axis, and is positioned inside the connecting groove 49, with its detachment from the connecting groove 49 being restricted by the pair of ribs 59, and has the fastening hole 61 located in the longitudinal center between the pair of ribs 59. At both ends of the connecting body 89 in the longitudinal direction that straddle the fastening hole 61, a pair of claw portions 91 are formed that protrude in the direction of rotation of the screw, which is the fastening member 19 that is screwed into the fastening hole 61 and rotated, and face the inner surface 87 of the connecting groove 49. The connecting body 89 is characterized in that the suspension member 45 of the opening / closing body 15 is fixed to it by the screw that passes through the suspension member 45 and fastens to the fastening hole 61.

[0014] In this suspension structure for the winding part of the opening / closing body, a connecting body 89 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 89 is formed in the shape of a long strip along its axis, and is positioned inside the connecting groove 49, with a pair of ribs 59 preventing it from falling out of the connecting groove 49. Before the fastening member 19 is fastened, the connecting body 89 can move freely along the connecting groove 49. In other words, the connecting body 89 can be freely positioned to match the fixed position of the suspension member 45 of the opening / closing body 15. The connecting body 89 has a fastening hole 61 located in the longitudinal center between a pair of ribs 59. At both longitudinal ends of the connecting body 89, flanking the fastening hole 61, a pair of claw portions 91 are formed that protrude in the direction of rotation of the screw, which is the fastening member 19 that is screwed into the fastening hole 61 and rotated, and face the inner surface 87 of the connecting groove 49. The suspension member 45 of the opening / closing body 15 is fixed to the connecting body 89 by a screw that passes through the suspension member 45 and fastens to the fastening hole 61. In this suspension structure for the winding mechanism, a screw that passes through the suspension member 45 is tightened into a fastening hole 61 of a connecting body 89 inserted into a connecting groove 49. When the screw rotates, the connecting body 89 rotates in the direction of the screw's rotation, and the claws 91 provided at both ends in the longitudinal direction bite into and catch on the opposing inner grooves 87 of the connecting groove 49. With the claws 91 caught on the inner grooves 87, the connecting body 89's movement along the connecting groove 49 is restricted. Furthermore, as the screw that has passed through the suspension member 45 is fastened into the fastening hole 61, the connecting body 89 is pulled closer. As a result, the connecting body 89, along with the suspension member 45, sandwiches the winding shaft 17 from both the inside and outside, restricting the axial movement of the winding shaft 17 and fixing it to the winding shaft 17. At the same time, the opening and closing body 15 is also fixed to the winding shaft 17 via the connecting body 89 through the suspension member 45. In this suspension structure for the winding part of the opening / closing body, the suspension member 45 of the opening / closing body 15 can be quickly and easily fixed to the desired position on the winding shaft 17 with a simple structure, simply by fastening screws into the fastening holes 61.

[0015] Claims of the present invention The suspension structure for the winding part of the opening / closing body described in 5 is the suspension structure for the winding part of the opening / closing body described in any one of claims 1 to 4, The connecting groove 49 protrudes inward from the winding shaft 17 as a convex portion 55, and this convex portion 55 engages with a recess 57 formed on the outer surface 51 of the wheel 41, which is coaxially inserted into the inner circumference of the winding shaft 17 and rotated.

[0016] In this suspension structure for the winding mechanism of the opening / closing unit, the connecting groove 49 protrudes inward from the winding shaft 17 as a convex portion 55. That is, the convex portion 55 is the inverse shape of the connecting groove 49 and protrudes inward from the winding shaft 17. A wheel 41, formed with a slightly smaller outer diameter, is coaxially inserted into the inside of the cross-section of the winding shaft 17 perpendicular to its axis. This wheel 41 is rotationally driven by the opening / closing mechanism 35. The wheel 41 has a recess 57 on its outer circumference that engages with the convex portion 55. As a result, the winding shaft 17 is driven to rotate in both forward and reverse directions by the transmission of rotation from the wheel 41 to the convex portion 55 via the recess 57.

[0017] The suspension structure for the winding part of the opening / closing body according to claim 6 of the present invention is the suspension structure for the winding part of the opening / closing body according to any one of claims 1 to 4, The pair of ribs 59 are characterized in that they have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed by extending with the groove width narrowed in the direction along the outer circumferential surface 51.

[0018] In this suspension structure for the winding mechanism of the opening / closing body, a pair of ribs 59 have surfaces that follow the outer circumferential surface 51 of the winding shaft 17, and are formed by narrowing the groove width in the direction along this outer circumferential surface 51, so as not to protrude outward from the outer circumferential surface 51. As a result, they do not interfere with the suspension member 45 to which they are attached.

[0019] The suspension structure for the winding part of the opening / closing body according to claim 7 of the present invention is the suspension structure for the winding part of the opening / closing body according to any one of claims 1 to 4, The pair of ribs 59 are characterized in that they have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed by extending with the groove width narrowed in the direction along the outer circumferential surface 51.

[0020] In this suspension structure for the winding mechanism of the opening / closing body, a pair of ribs 59 have surfaces that follow the outer circumferential surface 51 of the winding shaft 17, and are formed by narrowing the groove width in the direction along this outer circumferential surface 51, so as not to protrude outward from the outer circumferential surface 51. As a result, they do not interfere with the suspension member 45 to which they are attached. [Effects of the Invention]

[0021] According to the suspension structure of the winding mechanism of the opening / closing body described in claim 1 of the present invention, the material cost of the winding shaft itself can be reduced, a fire-resistant structure can be realized using the material, and the suspension member can be fastened and fixed from the outer circumference of the winding shaft, making assembly work easy.

[0022] Furthermore, by fastening a screw that passes through the suspension member to the connecting body inserted into the connecting groove, the U-shaped bent portion is deformed, the inner groove plate portion is pulled towards the outer groove plate portion, and the connecting body can be fixed to the winding shaft with the rib in between. This reduces material costs, realizes a fire-resistant structure, and because the connecting body is positioned to protrude from the outer surface of the winding shaft, it is easy to move and position the connecting body, and assembly work is also simplified.

[0023] According to the suspension structure of the winding part of the opening / closing body described in claim 2 of the present invention, by fastening a screw that passes through the suspension member to the connecting body inserted into the connecting groove, the suspension member of the opening / closing body can be fixed to the connecting body even when it is not possible to secure a connecting groove depth greater than the screw length due to the structure of the winding shaft. This reduces material costs, enables a fire-resistant structure, and because the connecting body is positioned to protrude from the outer surface of the winding shaft, it is easy to move and position the connecting body, and assembly work is also made easier.

[0024] According to the suspension structure of the winding part of the opening / closing body described in claim 3 of the present invention, by fastening a screw that passes through the suspension member to the longitudinal center of the slit of the connecting body inserted into the connecting groove, the connecting body can be expanded in the groove width direction, and the connecting body can be hooked into the connecting groove and fixed to the winding shaft. As a result, the structure is simple, material costs can be reduced, a fire-resistant structure can be realized, and assembly work can be made easy.

[0025] According to the suspension structure of the winding mechanism of the opening / closing body described in claim 4 of the present invention, by tightening a screw that passes through the suspension member into the fastening hole of the connecting body inserted into the connecting groove, the connecting body can be rotated and the claw portion can be hooked onto the inner surface of the groove of the connecting groove to fix the connecting body to the winding shaft. This allows for low material costs, a fire-resistant structure to be realized, and easy assembly.

[0026] According to the suspension structure of the winding part of the opening / closing body described in claim 5 of the present invention, the convex portion that has the inverted shape of the connecting groove and protrudes inward from the winding shaft can be engaged with the recess provided on the outer surface of the wheel, and the forward and reverse rotation from the wheel can be transmitted to the winding shaft by effectively utilizing the connecting groove.

[0027] According to the suspension structure of the winding part of the opening / closing body described in claim 6 of the present invention, the pair of ribs do not protrude outward from the outer circumferential surface of the winding shaft, thereby preventing interference with the suspension member to which it is attached.

[0028] According to the suspension structure of the winding part of the opening / closing body described in claim 7 of the present invention, the pair of ribs do not protrude outward from the outer circumferential surface of the winding shaft, thereby preventing interference with the suspension member to which it is attached. [Brief explanation of the drawing]

[0029] [Figure 1] This is an external perspective view of a window shutter device equipped with a suspension structure for the winding mechanism of the opening / closing body according to the first embodiment of the present invention. [Figure 2] This is a front view showing a portion of the shutter storage compartment cut across a vertical plane. [Figure 3] This is a side view of the winding shaft 17, which is part of the components constituting the suspension structure of the winding part of the opening / closing body according to the first embodiment of the present invention. [Figure 4] Figure 3 is an exploded perspective view showing the connecting body detached from the connecting groove. [Figure 5] (a) is a magnified view of the main part of the connecting groove before the connecting body is fixed, and (b) is a cross-sectional view AA of (a). [Figure 6] (a) is an enlarged view of the main part of the connecting groove to which the connecting body is fixed, and (b) is a cross-sectional view of BB in (a). [Figure 7] This is an exploded perspective view of a winding shaft equipped with a suspension structure for an opening / closing winding section according to a second embodiment of the present invention. [Figure 8] This is a magnified view of the main part of the connecting groove before the connecting body is fixed in place. [Figure 9] This is a magnified view of the main part of the connecting groove to which the connecting body is fixed. [Figure 10] This is an exploded perspective view of a winding shaft equipped with a suspension structure for the winding part of an opening / closing body according to a third embodiment of the present invention. [Figure 11] This is a front view of the connecting groove before the connecting body is fixed in place. [Figure 12] This is a front view of the connecting groove to which the connecting body is fixed. [Figure 13] This is a side view of the connecting groove to which the connecting body is fixed. [Figure 14] This is an exploded perspective view of a winding shaft equipped with a suspension structure for an opening / closing winding section according to a fourth embodiment of the present invention. [Figure 15] This is a front view of the connecting groove before the connecting body is fixed in place. [Figure 16] This is a front view of the connecting groove to which the connecting body is fixed. [Figure 17]This is a side view of the connecting groove to which the connecting body is fixed. [Modes for carrying out the invention]

[0030] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [First Embodiment] Figure 1 is an external perspective view of a window shutter device 11 equipped with a suspension structure for the winding mechanism of the opening / closing body according to the first embodiment of the present invention. The suspension structure of the winding mechanism of the opening / closing body according to the first embodiment is a structure in which an opening / closing body 15 that opens and closes the opening 13 of a building and a winding shaft 17 (see Figure 2) that winds up the opening / closing body 15 are connected by a fastening member 19 (see Figure 3). The suspension structure of the winding mechanism of the opening / closing body is suitable for use in, for example, a window shutter device 11.

[0031] The window shutter device 11 is installed on the outside of the sash window 21 that constitutes the window portion of the house. An opening 13 is provided in the exterior wall of the house. The sash window 21 is installed in this opening 13. The window shutter device 11 has a shutter curtain which is an opening and closing body 15. The shutter curtain 15 moves up and down on the outside of the exterior wall to cover the sash window 21. In this embodiment, the shutter curtain 15 is made up of multiple steel slats 23 that can improve fire resistance performance.

[0032] The shutter curtain 15 is constructed by connecting multiple slats 23 in a windable planar shape by engaging the edges of adjacent slats 23 along their longitudinal directions. A base plate 25 is attached to the end of the shutter curtain 15 in the direction of extension. The base plate 25 sits on the lower frame 27 when the shutter curtain 15 is lowered. The shutter curtain 15 is guided up and down by a pair of guide rails 28 provided on the left and right sides of the sash window 21. The guide rails 28 extend in the direction of up and down of the shutter curtain 15 and guide the side edges of the shutter curtain 15 by sandwiching them from the front and back. Each of the pair of guide rails 28 is fixed to the inside of a pair of outer frames 29 attached to the exterior wall on the left and right sides of the sash window 21.

[0033] A pair of outer frames 29 extend in the vertical direction of the shutter curtain 15, and their lower ends are connected by a lower frame 27. At their upper ends, these pairs of outer frames 29 support a portion of the load in the shutter storage section 31. The shutter storage section 31 is formed in a roughly rectangular parallelepiped shape that extends in the width direction of the sash window 21. Decorative covers that protrude slightly outward from the outer frames 29 may be attached to the side plates at both longitudinal ends of the shutter storage section 31.

[0034] An opening for the shutter curtain 15 in the guide rail 28 is provided at the upper end of the pair of outer frames 29. This opening is located inside the shutter storage section 31, which is placed on the upper end of the outer frame 29. The upper ends of the pair of outer frames 29 are fixed by an upper frame (not shown). The upper frame is a so-called lintel. The shutter storage section 31 is mounted above this lintel.

[0035] Figure 2 is a front view of a portion of the shutter storage section 31, cut in half vertically. The shutter storage section 31 is provided with brackets 33 on both sides. A tubular motor 35, which is an opening and closing mechanism, is fixed to one bracket 33. A fixed shaft 37 is fixed to the other bracket 33. The rotating shaft 39 of the tubular motor 35 and the fixed shaft 37 are arranged coaxially.

[0036] The tubular motor 35 is equipped with a reduction gear, which reduces the torque by a predetermined ratio, causing the rotating shaft 39 to rotate with a predetermined torque. Wheels 41 are rotatably mounted on both ends of the fixed shaft 37 via bearings. Wheels 41 of the same diameter are also rotatably mounted on the rotating shaft 39 via bearings. Near the fixed part of the tubular motor 35, a rotating body 43 (limit ring) of the same diameter as the wheels 41 is provided. This rotating body 43 is not connected to the rotating shaft 39 that rotates when the tubular motor is driven, and is freely rotatable.

[0037] A hollow winding shaft 17 is fixed to the outer circumference of the wheel 41 and the rotating body 43 as a winding member for winding up the shutter curtain 15. One end of the shutter curtain 15 is connected to the outer circumference of this winding shaft 17 via a suspension member 45 (see Figure 3), which is a suspension slat. The suspension member 45 is a slat that forms the upper end (one end) of the slats 23 that make up the shutter curtain 15. As shown in the figure, both ends along the longitudinal direction are formed in the same way as the other slats 23, but the shape of the slat body portion sandwiched between these ends is different from that of the other slats 23, and it has a mounting plate portion 46 that protrudes in the direction toward the inside of the winding, and preferably the mounting plate portion 46 is formed in the shape of a flat plate. In addition, the suspension member 45 may have the same longitudinal length as the other slats 23, or it may be formed to be shorter than the other slats 23 and have a segmented structure in which multiple members are arranged in the longitudinal direction of the slats 23, or it may have a shape that includes an edge that has a connection portion with the slats 23 and an edge that is formed in the shape of a flat plate, and it may have a mounting plate portion 46 through which the fastening member 19 described later passes, and it may be configured to be the upper end of the shutter curtain 15.

[0038] Furthermore, a winding spring 47 (balance spring) is provided on the fixed shaft 37. This winding spring 47 is a torsion spring biased in the rotational direction of the winding shaft 17 when winding up the shutter curtain 15, allowing the shutter curtain 15 to be wound up with little force. Therefore, by providing this winding spring 47, the load during winding is reduced, and the tubular motor 35 is made smaller as a result. In this way, the window shutter device 11 is made smaller and simpler overall by using a tubular motor 35 as an electric opener and closed mechanism and by incorporating a winding spring 47. The outer shape of the wheel 41 and the rotating body 43 may be circular, having an outer diameter approximately equal to the inner diameter of the winding shaft 17, or it may be formed into a polygon.

[0039] Figure 3 is a side view of the winding shaft 17, which is part of the components constituting the suspension structure of the winding mechanism of the opening / closing body according to the first embodiment of the present invention. The winding shaft 17 has a connecting groove 49 along its axis on its outer surface 51 and is formed as a hollow pipe by roll forming. The winding shaft 17 has the connecting groove 49 and groove-shaped recesses 53 that are approximately the same shape as the connecting groove 49, provided at equal intervals in the circumferential direction. For example, there is one connecting groove 49 and three recesses 53. Since the connecting groove 49 and recesses 53 are formed by bending the plate material of the winding shaft 17 inward, they protrude as convex portions 55 on the inside of the winding shaft 17.

[0040] The suspension structure of the winding part of the opening / closing mechanism has a connecting groove 49 and a recessed portion 53 that protrude as a convex portion 55 on the inside of the winding shaft 17, and this convex portion 55 engages with a recess 57 formed on the outer surface 51 of the wheel 41, which is inserted coaxially into the inner circumference of the winding shaft 17 and rotated.

[0041] The connecting groove 49 has a pair of ribs 59 formed by a pair of groove edges facing each other across the groove width, which extend in a direction that narrows the groove width and then fold back in opposite directions. The ribs 59 can be formed by a crushing bend, or so-called hemming bend. Preferably, the pair of ribs 59 have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed by extending in a direction that narrows the groove width along this outer circumferential surface 51, that is, they do not protrude outward from the outer circumferential surface 51, and more preferably, are formed flat without following the curved surface of the outer circumferential surface 51. A connecting body 63 is inserted into the connecting groove 49, exposing a fastening hole 61 (see Figure 4) between the pair of ribs 59. The connecting body 63 can be made of steel. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59. The connecting body 63 is movable in a direction along the axis that is the longitudinal direction of the groove. The connecting body 63 is secured to the upper end of the shutter curtain 15 by a fastening member 19, such as a screw, which passes through the upper end of the hanging member 45 and fastens to the fastening hole 61. The fastening member 19 may be a screw, bolt, rivet, or the like.

[0042] Figure 4 is an exploded perspective view showing the connecting body 63, as shown in Figure 3, detached from the connecting groove 49. The suspension structure of the winding section of the opening / closing body has a connecting body 63 which has a groove outer plate portion 65 positioned on the outside of the connecting groove 49 with the rib 59 in between, and a groove inner plate portion 67 positioned on the inside of the connecting groove 49 with the rib 59 in between. The groove outer plate portion 65 and the groove inner plate portion 67 are integrally continuous in a U-shape or U-shape via a bent portion 69, and are formed by bending a flat plate. The bent portion 69 is formed to be narrow enough to be positioned between a pair of ribs 59. A through hole 71 is formed in the groove outer plate portion 65. A fastening hole 61 is formed in the groove inner plate portion 67. The through hole 71 and the fastening hole 61 are arranged coaxially. The fastening hole 61 has an inner diameter into which a screw, which is a fastening member 19, is screwed, and the through hole 71 has an inner diameter larger than the outer diameter of the screw. The groove outer plate portion 65 also has an outer clamping portion 73 for clamping the rib 59 from the outside of the winding shaft 17. The groove inner plate portion 67 has an inner clamping portion 75 for clamping the rib 59 from the inside of the winding shaft 17. The outer clamping portion 73 and the inner clamping portion 75 are specifically the edge portions of the groove outer plate portion 65 and the groove inner plate portion 67, respectively, and are formed to protrude beyond the bent portion 69 in the same direction as the extension direction of the rib 59.

[0043] Figure 5(a) is an enlarged view of the main part of the connecting groove 49 before the connecting body 63 is fixed, and (b) is a cross-sectional view AA of (a). In this suspension structure for the winding mechanism of the opening / closing body, when the connecting body 63 is inserted into the connecting groove 49, the outer clamping portion 73 of the groove outer plate portion 65 is positioned outside the rib 59, and the inner clamping portion 75 of the groove inner plate portion 67 is positioned inside the rib 59. In this state, the connecting body 63 can move along the connecting groove 49. The fastening member 19, which has passed through the suspension member 45, can be inserted into the connecting body 63 through the through hole 71. The fastening member 19 inserted into the through hole 71 can be screwed into the fastening hole 61 of the groove inner plate portion 67, which is arranged coaxially.

[0044] Figure 6(a) is an enlarged view of the main part of the connecting groove 49 to which the connecting body 63 is fixed, and (b) is a cross-sectional view of BB in (a). In this suspension structure for the winding part of the opening / closing body, the fastening member 19 is fastened to the fastening hole 61, so that the rib 59 can be clamped from both the inside and outside in the radial direction of the winding shaft 17 by the outer clamping portion 73 formed on the outer groove plate portion 65 and the inner clamping portion 75 formed on the inner groove plate portion 67.

[0045] Next, the operation of the configuration according to the first embodiment described above will be explained.

[0046] In the suspension structure of the winding section of the opening / closing body according to the first embodiment, the winding shaft 17 is made into a hollow pipe by roll forming. The hollow pipe is formed by folding the edges of both ends of a plate material in opposite directions and joining them together, and then flattening the overlapping portion in the thickness direction of the plate. The winding shaft 17 is formed by roll forming and has a connecting groove 49 along its axis on its outer surface 51.

[0047] The connecting groove 49 has a pair of ribs 59 formed by a pair of groove edges facing each other across the groove width, which extend in a direction that narrows the groove width, then fold back in opposite directions and flatten. In other words, the connecting groove 49 is formed in a roughly T-shaped groove with the groove width at the groove edges being narrower than the bottom of the groove, and widening towards the back. The pair of ribs 59 have a continuous surface along the outer circumferential surface 51 of the winding shaft 17, and are formed to extend with a narrower groove width in the direction along this outer circumferential surface 51. Furthermore, they are formed flat so that they do not protrude outward from the outer circumferential surface 51, and the outer clamping portion 73 and inner clamping portion 75 of the connecting body 63 are in close contact and do not interfere when fixing the suspension member 45.

[0048] A connecting body 63 is inserted into the connecting groove 49, with fastening holes 61 exposed between a pair of ribs 59. The connecting body 63 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is movable in the direction along the axis. In other words, the connecting body 63 can be freely positioned to match the fixed position of the suspension member 45 of the shutter curtain 15. The suspension member 45 of the shutter curtain 15 is fixed to the connecting body 63 by fastening members 19 that pass through the suspension member 45 and fasten into the fastening holes 61.

[0049] In this way, in the suspension structure of the winding mechanism of the opening / closing body, even if the winding shaft 17 is made of thin sheet metal, the connecting body 63 can be inserted into the connecting groove 49 provided on the outer surface 51 of the winding shaft 17 in a way that prevents it from coming loose, and the suspension member 45 of the shutter curtain 15 can be easily fastened to this connecting body 63 with sufficient fixing strength. As a result, the suspension structure of the winding mechanism of the opening / closing body can be made of inexpensive steel instead of expensive aluminum. Even if the winding shaft 17 is made of thin steel sheet metal, by forming the connecting groove 49 and arranging the connecting body 63 inside it, it becomes possible to fasten the suspension member 45 using screws.

[0050] Furthermore, by making the winding shaft 17 out of steel, the fire resistance can be improved compared to using aluminum. Since the fastening member 19 can be fastened from the outer circumference of the winding shaft 17, the fastening position is easier to see, and there is no need to place a nut inside the winding shaft 17, resulting in a simple structure that allows for easy and quick fastening work.

[0051] Furthermore, in the suspension structure of this opening / closing winding section, the connecting groove 49 protrudes inward from the winding shaft 17 as a convex portion 55. That is, the convex portion 55 is the inverse shape of the connecting groove 49 and protrudes inward from the winding shaft 17. A wheel 41, formed with a slightly smaller outer diameter, is coaxially inserted into the inside of the cross section perpendicular to the axis of the winding shaft 17. This wheel 41 is rotationally driven by the opening / closing mechanism 35. The wheel 41 has a recess 57 on its outer circumference with which the convex portion 55 engages. As a result, the winding shaft 17 is driven to rotate in both forward and reverse directions by the transmission of rotation from the wheel 41 from the recess 57 to the convex portion 55. Consequently, the convex portion 55, which is the inverse shape of the connecting groove 49 and protrudes inward from the winding shaft 17, can engage with the recess 57 provided on the outer surface 51 of the wheel 41, and the forward and reverse rotation from the wheel 41 can be effectively utilized to transmit the winding shaft 17.

[0052] In the suspension structure of the winding part of the opening / closing body according to the first embodiment, the connecting body 63 is inserted into the connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 63 is integrally formed in a U-shape via a bent portion 69, comprising an outer groove plate portion 65 positioned outside the connecting groove 49 with the rib 59 in between, and an inner groove plate portion 67 positioned inside the connecting groove 49 with the rib 59 in between.

[0053] The connecting body 63 has a through hole 71 in the outer groove plate portion 65 through which the fastening member 19 passes, and a fastening hole 61 in the inner groove plate portion 67 for fastening the fastening member 19. In addition, an outer clamping portion 73 is formed on the outer side of the groove of the rib 59, and an inner clamping portion 75 is formed on the inner side of the groove of the rib 59, which is located inside the groove of the rib 59.

[0054] A screw, which is a fastening member 19 that penetrates the suspension member 45, is screwed into the fastening hole 61 of the connecting body 63 inserted into the connecting groove 49 and fastened. Before the fastening member 19 is fastened, the connecting body 63 can move freely along the connecting groove 49. In other words, the connecting body 63 can be freely positioned to match the fixed position of the suspension member 45 of the shutter curtain 15.

[0055] Meanwhile, as the screw 19 that has passed through the suspension member 45 passes through the through hole 71 in the outer groove plate portion 65 and fastens to the fastening hole 61 in the inner groove plate portion 67, the U-shaped bent portion 69 deforms, and the inner groove plate portion 67 is pulled towards the outer groove plate portion 65. As a result, the connecting body 63, with its outer clamping portion 73 on the outer groove plate portion 65 and its inner clamping portion 75 on the inner groove plate portion 67, clamps the pair of ribs 59 from both the inside and outside directions of the winding shaft 17, restricting its movement and fixing it to the winding shaft 17. At the same time, the shutter curtain 15 is also fixed to the winding shaft 17 via the connecting body 63, with the suspension member 45 being the same.

[0056] In this suspension structure for the winding mechanism of the opening and closing body, the suspension member 45 of the shutter curtain 15 can be quickly and simply fixed to the desired position on the winding shaft 17 by only fastening the fastening member 19 to the connecting body 63. As a result, the material cost of the winding shaft 17 can be reduced, a fire-resistant structure can be achieved using that material, and assembly work can be made easy.

[0057] Next, a second embodiment will be described.

[0058] Figure 7 is an exploded perspective view of a winding shaft 17 equipped with a suspension structure for the winding part of the opening / closing body according to the second embodiment of the present invention. In the second embodiment, the same reference numerals are used for members and parts equivalent to those shown in Figures 1 to 3, and redundant explanations are omitted. The suspension structure of the winding mechanism of the opening / closing body according to the second embodiment includes a connecting body 77 comprising a groove outer plate portion 65 positioned outside the connecting groove 49 and a groove inner plate portion 67 positioned inside the connecting groove 49. The connecting body 77 can be made of steel. The groove outer plate portion 65 has a fastening hole 61 approximately in the center of a protruding portion 79 that protrudes from the outer circumferential surface 51 of the winding shaft 17. The groove outer plate portion 65 is also formed by bending an edge portion 80 that extends from the protruding portion 79 along the outer circumferential surface 51 of the winding shaft 17 in an approximately V-shape. The groove inner plate portion 67 is provided at both longitudinal ends of the groove outer plate portion 65 and is formed in the shape of a leg plate that extends parallel to the groove bottom of the connecting groove 49 and has approximately the same dimensions as the groove width of the connecting groove 49.

[0059] Figure 8 is an enlarged view of the main part of the connecting groove 49 before the connecting body 77 is fixed in place. In this suspension structure for the winding mechanism of the opening / closing body, when the connecting body 77 is inserted into the connecting groove 49, the outer groove plate portion 65 is positioned outside the rib 59, and the inner groove plate portion 67 is positioned inside the rib 59. In this state, the connecting body 77 is prevented from falling out of the connecting groove 49 by the pair of ribs 59, and is able to move along the connecting groove 49. The fastening member 19, which penetrates the suspension member 45, can be screwed into the fastening hole 61 of the protruding portion 79 of the connecting body 77.

[0060] Figure 9 is an enlarged view of the main part of the connecting groove 49 to which the connecting body 77 is fixed. In this suspension structure for the winding mechanism of the opening / closing unit, the suspension member 45 is fixed to the connecting body 77 by fastening a fastening member 19 that passes through the suspension member 45 into a fastening hole 61. As a result, the shutter curtain 15 is attached to the winding shaft 17 via the connecting body 77.

[0061] Furthermore, the suspension structure of this opening / closing winding section may be provided with a separate member to restrict the movement of the suspension member 45 in the direction along the axis of the winding shaft 17, that is, in the longitudinal direction of the connecting groove 49. The separate member can be, for example, a member with a shape similar to the connecting body 63 of the first embodiment described above.

[0062] Next, the operation of the configuration according to the second embodiment described above will be explained.

[0063] In this suspension structure for the winding mechanism of the opening / closing unit, a connecting body 77 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. Before the fastening member 19 is fastened, the connecting body 77 can move freely along the connecting groove 49. In other words, the connecting body 77 can be freely positioned to match the fixed position of the suspension member 45 of the shutter curtain 15.

[0064] The connecting body 77 has an outer groove plate portion 65 positioned outside the connecting groove 49 and an inner groove plate portion 67 positioned inside the connecting groove 49. The outer groove plate portion 65 has a projection 79 that protrudes from the outer circumferential surface 51 of the winding shaft 17, and fastening holes 61 are formed in this projection 79.

[0065] The connecting body 77 is prevented from falling out of the connecting groove 49 by a pair of ribs 59 that prevent the inner groove plate portion 67 from coming out of the connecting groove 49. A fastening member 19, which passes through the suspension member 45, is fastened to the protruding portion 79 of the outer groove plate portion 65 that is prevented from coming out of the connecting groove 49. As a result, the shutter curtain 15 is fastened to the connecting body 77, which is prevented from coming out of the connecting groove 49, and is fixed to the winding shaft 17 via this connecting body 77. Furthermore, the pair of ribs 59 have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed to extend with a narrower groove width in the direction along the outer circumferential surface 51, and are also formed flat, so that they do not protrude outward from the outer circumferential surface 51 and do not interfere with the groove outer plate portion 65 of the connecting body 77 and the suspension member 45.

[0066] In this suspension structure for the winding mechanism of the opening / closing body, the suspension member 45 of the shutter curtain 15 can be quickly and easily fixed to the desired position on the winding shaft 17 with a simple structure, simply by fastening the fastening member 19 to the connecting body 77.

[0067] In this suspension structure for the winding mechanism of the opening / closing body, the fastening member 19 is fastened to the protruding portion 79 of the groove outer plate portion 65, which is located outside the connecting groove 49, and only the groove inner plate portion 67 is located inside the connecting groove 49. In other words, the depth of the connecting groove 49 can be made shallow. Also, by positioning the groove inner plate portion 67 in the connecting groove 49, a space (room) equal to the length of the screw can be secured. This space can be set to a length that allows fastening to be completed before the tip of the screw reaches the bottom of the connecting groove 49.

[0068] In this suspension structure for the winding mechanism of the opening / closing unit, even when screws are fastened, the tip of the screw does not hit the bottom of the connecting groove 49, allowing the connecting groove 49 to be formed with the minimum necessary depth. As a result, the winding shaft 17 can accommodate a wheel 41 with a larger outer diameter. Consequently, even if the screw length cannot be sufficiently secured due to the structure of the winding shaft 17, the suspension member 45 of the shutter curtain 15 can be fixed to the connecting body 77.

[0069] Next, a third embodiment will be described.

[0070] Figure 10 is an exploded perspective view of a winding shaft 17 equipped with a suspension structure for the winding part of the opening / closing body according to the third embodiment of the present invention. In the third embodiment, the same reference numerals are used for members and parts equivalent to those shown in Figures 1 to 3, and redundant explanations are omitted. In the suspension structure of the winding part of the opening / closing body according to the third embodiment, the connecting body 81 is formed in the shape of a long strip along the axis. The connecting body 81 can be made of steel. The connecting body 81 has a width that is approximately the same as the width of the connecting groove 49, so that it is positioned inside the connecting groove 49 and is prevented from falling out of the connecting groove 49 by a pair of ribs 59. The connecting body 81 has a slit 83 that runs along the longitudinal direction, which is the fastening hole 61.

[0071] Figure 11 is a front view of the connecting groove 49 before the connecting body 81 is fixed in place. The connecting body 81 is formed with a slit 83 exposed between a pair of ribs 59. When inserted into the connecting groove 49, the connecting body 81 can move in the longitudinal direction of the connecting groove 49 without touching the inner surface of the groove.

[0072] Figure 12 is a front view of the connecting groove 49 to which the connecting body 81 is fixed. A fastening member 19, which penetrates the suspension member 45 of the shutter curtain 15, is screwed into the slit 83 of the connecting body 81. The fastening member 19 is screwed into the longitudinal center of the slit 83. With the fastening member 19 screwed into the slit 83, the connecting body 81 widens the spacing of the slit 83, and its width at the longitudinal center expands outward in the width direction of the slit 83, causing it to protrude. Both sides 85 of the protruding connecting body 81 become equal to the inner width of the connecting groove 49 and are in a state of pressure contact with the inner surface 87 of the groove.

[0073] Figure 13 is a side view of the connecting groove 49 to which the connecting body 81 is fixed. In this suspension structure for the winding mechanism of the opening / closing body, the suspension member 45 is fixed to the connecting body 81 by fastening member 19, which passes through the suspension member 45, and fastening member 19 to the slit 83. At the same time, the connecting body 81 expands as fastening member 19 is screwed in, and both sides 85 press against the inner surface 87 of the groove, fixing it to the connecting groove 49. As a result, the shutter curtain 15 is fixed to the winding shaft 17 via the connecting body 81.

[0074] Next, the operation of the configuration according to the third embodiment described above will be explained.

[0075] In this suspension structure for the winding mechanism of the opening / closing body, a connecting body 81 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 81 is formed in the shape of a long strip along the axis of the winding shaft 17, and is positioned inside the connecting groove 49, with a pair of ribs 59 preventing it from falling out of the connecting groove 49. Before the fastening member 19 is fastened, the connecting body 81 can move freely along the connecting groove 49. In other words, the connecting body 81 can be freely positioned to match the fixed position of the suspension member 45 of the shutter curtain 15.

[0076] The connecting body 81 has slits 83 formed along its longitudinal direction, which serve as fastening holes 61. The slits 83 are exposed between a pair of ribs 59. The spacing between the slits 83 is smaller than the outer diameter of the screw that forms the fastening member 19, allowing the screw 19 to be screwed in.

[0077] The shutter curtain 15 is fixed to the connecting body 81 by screws 19 that pass through the suspension member 45 and fasten into the slit 83. At this time, the screws 19 are screwed into the longitudinal center of the slit 83 on the connecting body 81. Since the spacing width of the slit 83 is smaller than the outer diameter of the screws 19, when the screws 19 are screwed into the connecting body 81, the width of the longitudinal center is widened outward, and the shape changes from a long rectangle to a roughly barrel-shaped or roughly diamond-shaped shape with the top and bottom of the center widening. The longitudinal center of the connecting body 81, which has been widened outward, is pressed against the inner surface 87 of the opposing grooves of the connecting groove 49. In addition, the fastening by screwing in the screws 19 causes the connecting body 81 to come into contact with the inside of the rib 59, sandwiching the rib 59 between the connecting body 81 and the suspension member 45. Furthermore, the pair of ribs 59 have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed by narrowing the groove width in the direction along this outer circumferential surface 51 and are formed flat so that they do not protrude outward from the outer circumferential surface 51 and do not interfere with the suspension member 45, and the ribs 59 are sandwiched between the suspension member 45 and the connecting body 81.

[0078] In this suspension structure for the winding mechanism of the opening and closing body, the suspension member 45 of the shutter curtain 15 can be quickly and simply fixed to the desired position on the winding shaft 17 by only fastening screws to the slit 83. As a result, the connecting body 81 can be expanded in the groove width direction, and the connecting body 81 can be expanded and deformed within the connecting groove 49 to hook and fix to the winding shaft 17. This allows the material of the winding shaft 17 to be changed to steel, reducing material costs, and also enables a fire-resistant structure by replacing it with steel. Furthermore, assembly work is simplified as it only requires fastening screws 19.

[0079] Next, a fourth embodiment will be described.

[0080] Figure 14 is an exploded perspective view of a winding shaft 17 equipped with a suspension structure for the winding part of the opening / closing body according to the fourth embodiment of the present invention. In the fourth embodiment, the same reference numerals are used for members and parts equivalent to those shown in Figures 1 to 3, and redundant explanations are omitted. In the fourth embodiment, the suspension structure of the winding mechanism of the opening / closing body is such that the connecting body 89 is formed in the shape of a long strip along the axis of the winding shaft 17. The connecting body 89 can be made of steel. The connecting body 89 is positioned inside the connecting groove 49, and its detachment from the connecting groove 49 is restricted by a pair of ribs 59. The connecting body 89 has a fastening hole 61 located in the longitudinal center between the pair of ribs 59.

[0081] Figure 15 is a front view of the connecting groove 49 before the connecting body 89 is fixed in place. A pair of claw portions 91 are formed at both longitudinal ends of the connecting body 89, flanking the fastening hole 61. The pair of claw portions 91 protrude in the direction of rotation of the screw, which is the fastening member 19 that is screwed into the fastening hole 61 and rotated, and each faces the inner surface 87 of the connecting groove 49.

[0082] Figure 16 is a front view of the connecting groove 49 to which the connecting body 89 is fixed. When the screw 19, which is screwed into the fastening hole 61, is tightened, the connecting body 89 rotates in the direction of rotation of the screw 19. As the connecting body 89 rotates, each of its protruding claw portions 91 in the direction of rotation comes into contact with and bites into the inner surface 87 of the connecting groove 49. With both ends of the claw portions 91 biting into the inner surface 87 of the groove, the connecting body 89's movement along the longitudinal direction of the connecting groove 49 is restricted.

[0083] Figure 17 is a side view of the connecting groove 49 to which the connecting body 89 is fixed. In this suspension structure for the winding mechanism of the opening / closing body, the suspension member 45 is fixed to the connecting body 89 by fastening member 19, which passes through the suspension member 45, into fastening hole 61. At the same time, as the fastening member 19 rotates, a pair of claws 91 bite into the inner surface 87 of the groove and are fixed to the connecting groove 49. As a result, the suspension member 45 of the shutter curtain 15 is fixed to the winding shaft 17 via the connecting body 89.

[0084] Next, the operation of the configuration according to the fourth embodiment described above will be explained.

[0085] In this suspension structure for the winding mechanism of the opening / closing unit, a connecting body 89 is inserted into a connecting groove 49 formed on the outer circumferential surface 51 of the winding shaft 17. The connecting body 89 is formed in the shape of a long strip along its axis, and is positioned inside the connecting groove 49, with a pair of ribs 59 preventing it from falling out of the connecting groove 49. Before the fastening member 19 is fastened, the connecting body 89 can move freely along the connecting groove 49. In other words, the connecting body 89 can be freely positioned to match the fixed position of the suspension member 45 of the shutter curtain 15.

[0086] The connecting body 89 has a fastening hole 61 located in the longitudinal center between a pair of ribs 59. At both longitudinal ends of the connecting body 89, flanking the fastening hole 61, a pair of claw portions 91 are formed that protrude in the direction of rotation of the screw, which is a fastening member 19 that is screwed into the fastening hole 61 and rotated, and face the inner surface 87 of the connecting groove 49. The hanging member 45 of the shutter curtain 15 is fixed to the connecting body 89 by a screw 19 that passes through the hanging member 45 and fastens to the fastening hole 61.

[0087] In this suspension structure for the winding mechanism of the opening / closing body, a screw 19 that passes through the suspension member 45 is tightened into a fastening hole 61 of a connecting body 89 inserted into a connecting groove 49. When the screw 19 is rotated, the connecting body 89 rotates in the direction of rotation of the screw 19, and the claw portions 91 provided at both ends in the longitudinal direction bite into the inner surface 87 of the connecting groove 49. With the claw portions 91 biting into the inner surface 87 of the groove, the movement of the connecting body 89 along the connecting groove 49 is restricted. In addition, the fastening by screwing in the screw 19 causes the connecting body 89 to come into contact with the inside of the rib 59, and the rib 59 is sandwiched between the connecting body 89 and the suspension member 45. Furthermore, the pair of ribs 59 have a surface that is continuous with the outer circumferential surface 51 of the winding shaft 17, and are formed by narrowing the groove width in the direction along this outer circumferential surface 51 and are formed flat so that they do not protrude outward from the outer circumferential surface 51 and do not interfere with the suspension member 45, and the ribs 59 are sandwiched between the suspension member 45 and the connecting body 89.

[0088] As a result, in this suspension structure for the winding mechanism of the opening and closing body, the suspension member 45 of the shutter curtain 15 can be quickly and simply fixed to the desired position on the winding shaft 17 by only the tightening of screws into the fastening holes 61.

[0089] Accordingly, according to the suspension structure of the winding mechanism of the opening / closing body as embodied in the first, second, third, and fourth embodiments, the material cost of the winding shaft 17 can be reduced by changing the material to steel, a fire-resistant structure can be realized by replacing it with steel, and the assembly work can be made easy as it only requires fastening screws 19. [Explanation of Symbols]

[0090] 13…Opening 15…Opening / closing mechanism (shutter curtain) 17... Winding shaft 19… Fastening component (screw) 41... Foil 45…Suspension component 49...Connection groove 51...Outer surface 55…Convex part 57…recess 59... Rib 61… Fastening hole 63…Connector 65…outer trough plate section 67…Inner slab of the trench 69…Folding section 71…Penetrating acupoint 73…Outer clamping section 75…Inner clamping part 77…Connector 79…protrusion 81…Connector 83…スリット 87…Inner surface of the ditch 89…Connector 91…Claws

Claims

1. A suspension structure for an opening / closing mechanism winding section, which connects an opening / closing mechanism that opens and closes an opening in a building with a winding shaft that winds up the opening / closing mechanism, using a fastening member. The winding shaft has a connecting groove along its axis on its outer surface and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove has a pair of ribs formed by folding and crushing the groove edges opposite each other across the groove width, which extend in a direction that narrows the groove width, and which are folded back in opposite directions. A connecting body is inserted into the connecting groove, exposing fastening holes between the pair of ribs. The connecting body is prevented from falling out of the connecting groove by the pair of ribs and is movable in the direction along the axis. The connecting body is secured to the opening / closing body by a fastening member that penetrates the opening / closing body and fastens to the fastening hole. The connecting body has a groove outer plate portion that is positioned on the outside of the connecting groove with the rib in between, and a groove inner plate portion that is positioned on the inside of the connecting groove with the rib in between. The outer groove plate portion and the inner groove plate portion are integrally formed in a U-shape via a bent portion. The outer plate portion of the groove has through holes, and the inner plate portion of the groove has fastening holes formed coaxially with the through holes. The suspension structure for the winding part of an opening / closing body is characterized in that the fastening member is fastened to the fastening hole, thereby clamping the rib from both the inside and outside in the radial direction of the winding shaft by the outer clamping portion formed on the outer plate portion of the groove and the inner clamping portion formed on the inner plate portion of the groove.

2. A suspension structure for an opening / closing body winding section, which connects an opening / closing body for opening and closing an opening in a building and a winding shaft for winding up the opening / closing body with a fastening member, The winding shaft has a connecting groove along its axis on its outer surface and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove has a pair of ribs formed by folding and crushing the groove edges opposite each other across the groove width, which extend in a direction that narrows the groove width, and which are folded back in opposite directions. A connecting body is inserted into the connecting groove, exposing fastening holes between the pair of ribs. The connecting body is prevented from falling out of the connecting groove by the pair of ribs and is movable in the direction along the axis. The connecting body is secured to the opening / closing body by a fastening member that penetrates the opening / closing body and fastens to the fastening hole. The connecting body has a groove outer plate portion disposed on the outside of the connecting groove and a groove inner plate portion disposed on the inside of the connecting groove, The grooved outer plate portion has the fastening holes in the protruding portion that extends from the outer circumferential surface of the winding shaft. The groove inner plate portion is prevented from falling out of the connecting groove by the pair of ribs, and is provided at both longitudinal ends of the groove outer plate portion, and is formed as a protruding leg plate with a dimension approximately the same as the groove width of the connecting groove. The suspension structure for the winding part of the opening / closing body is characterized in that the suspension member of the opening / closing body is fixed to the connecting body by the fastening member which penetrates the suspension member and fastens to the fastening hole.

3. A suspension structure for an opening / closing body winding section, which connects an opening / closing body for opening and closing an opening in a building and a winding shaft for winding up the opening / closing body with a fastening member, The winding shaft has a connecting groove along its axis on its outer surface and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove has a pair of ribs formed by folding and crushing the groove edges opposite each other across the groove width, which extend in a direction that narrows the groove width, and which are folded back in opposite directions. A connecting body is inserted into the connecting groove, exposing fastening holes between the pair of ribs. The connecting body is prevented from falling out of the connecting groove by the pair of ribs and is movable in the direction along the axis. The connecting body is secured to the opening / closing body by a fastening member that penetrates the opening / closing body and fastens to the fastening hole. The connecting body is formed in the shape of a long strip along the axis, and is positioned inside the connecting groove, with its detachment from the connecting groove being restricted by the pair of ribs. The connecting body has a slit along the longitudinal direction, which is the fastening hole, formed between the pair of ribs. The suspension structure for the winding part of the opening / closing body is characterized in that the suspension member of the opening / closing body is fixed to the connecting body by the fastening member which penetrates the suspension member and screws into the slit, and the screwing of the fastening member widens the spacing of the slit, thereby widening and deforming the width of the connecting body within the connecting groove to be equal to the inner width of the connecting groove.

4. A suspension structure for an opening / closing body winding section, which connects an opening / closing body for opening and closing an opening in a building and a winding shaft for winding up the opening / closing body with a fastening member, The winding shaft has a connecting groove along its axis on its outer surface and is formed as a hollow pipe with both ends of a plate material joined together. The connecting groove has a pair of ribs formed by folding and crushing the groove edges opposite each other across the groove width, which extend in a direction that narrows the groove width, and which are folded back in opposite directions. A connecting body is inserted into the connecting groove, exposing fastening holes between the pair of ribs. The connecting body is prevented from falling out of the connecting groove by the pair of ribs and is movable in the direction along the axis. The connecting body is secured to the opening / closing body by a fastening member that penetrates the opening / closing body and fastens to the fastening hole. The connecting body is formed in the shape of a long strip along the axis, and is positioned inside the connecting groove, with its detachment from the connecting groove being restricted by the pair of ribs, and has the fastening hole located in the longitudinal center between the pair of ribs. At both ends of the connecting body in the longitudinal direction that straddle the fastening hole, a pair of claw portions are formed that protrude in the direction of rotation of the screw, which is the fastening member that is screwed into the fastening hole and rotated, and face the inner surface of the connecting groove. The suspension structure for the winding part of the opening / closing body is characterized in that the suspension member of the opening / closing body is fixed to the connecting body by the screw that passes through the suspension member and fastens to the fastening hole.

5. The suspension structure for an opening / closing winding unit according to any one of claims 1 to 4, characterized in that the connecting groove protrudes inward as a convex portion on the inside of the winding shaft, and this convex portion engages with a recess formed on the outer surface of a wheel that is coaxially inserted into the inner circumference of the winding shaft and rotated.

6. The suspension structure for the winding part of the opening / closing body according to any one of claims 1 to 4, characterized in that the pair of ribs have a continuous surface along the outer circumferential surface of the winding shaft and are formed to extend with the groove width narrowed in the direction along the outer circumferential surface.

7. The suspension structure for the winding part of the opening / closing body according to any one of claims 1 to 4, characterized in that the pair of ribs have a continuous surface along the outer circumferential surface of the winding shaft and are formed to extend with the groove width narrowed in the direction along the outer circumferential surface.

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