Opening and closing body hanging structure

Abstract

To provide a hanging structure of an opening and closing body, which can suppress noise and malfunction occurring when the opening and closing body is opened or closed.SOLUTION: A hanging link 35 protruding from a top end of an opening and closing body 25 is supported by a winding drum in a hanging structure of the opening and closing body. A hanging drum 23 is fixed on outer peripheries of both ends of the winding drum. A fixing hole 43 in a direction along an axis line is formed so as to open on an end face 24 of the hanging drum 23. On the hanging link 35, a connection hole 47 is drilled on a tip plate part 45 in parallel with the end face 24 of the hanging drum 23, and the connection hole 47 is supported by the fixing hole 43 through a connection member. A base end plate part 55 on an opposite side to the tip plate part 45 is connected to an end of the opening and closing body 25 by a pivotally supporting pin. A crank bent part 57, which protrudes from outside of the end face 24 to an outer peripheral surface 71 side of the hanging drum 23 and offsets the base end plate part 55 to the outer peripheral surface 71 side, is formed between the tip plate part 45 and the base end plate part 55. The hanging drum 23 has a groove 59 along the axis line on the outer peripheral surface 71 with which the crank bent part 57 comes into contact.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a suspension structure for an opening / closing body. [Background technology]

[0002] In the case of a retractable opening / closing body such as a shutter curtain, the upper edge of the opening / closing body is connected to a retractable drum. Conventionally, the upper edge of the opening / closing body has been fixed to the outer circumferential surface of the retractable drum by bolts or the like (see, for example, Patent Document 1). On the other hand, some opening / closing bodies have a structure for connecting the slats, in which pivot pins protrude from both ends of the slats and the pivot pins are connected to each other by links. In an opening / closing body configured in this way, the links are wound inward from both ends of the retractable drum. For this reason, the uppermost hanging link that connects the link to the retractable drum has a tip plate portion on the upper end side connected to the end of the retractable drum from outside the end of the retractable drum, and a base plate portion on the lower end connected to the opening / closing body is connected to the link inward from the end of the retractable drum, i.e., offset toward the outer circumferential surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-83100 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in order to offset the hanging link from the end face of the hanging drum to the outer peripheral surface of the hanging drum, a portion that rides up onto the outer peripheral surface is required. This riding up portion is achieved by forming a crank bent portion between the tip plate portion and the base plate portion of the hanging link, thereby offsetting the tip plate portion and the base plate portion. Here, both the tip plate portion and the base plate portion become plate portions parallel to the end face of the winding drum. When this plate portion parallel to the end face is crank bent, an axis-parallel plate portion perpendicular to the end face is formed between the tip plate portion and the base plate portion that are parallel to the end face. This axis-parallel plate portion is located on the outer peripheral surface of the winding drum. When the link is wound around the outer peripheral surface of the winding drum, the edge (ridge portion) of the axis-parallel plate portion at this crank bent portion contacts the outer peripheral surface, oriented parallel to the axis. In a shutter device, when the opening is opened, the opening and closing body is wound around the outer peripheral surface of the winding drum, but this opening and closing body may be tightened. As a result, the edge of the axially parallel plate portion of the steel hanging link comes into contact with the outer surface of the aluminum winding drum (or hanging drum), and as the winding tightens, it bites in, and due to the difference in hardness of the two materials, the hanging drum is scraped and damaged, and the axially parallel plate portion becomes caught in this, causing the hanging link to become caught.In particular, when the winding operation is performed to close the opening and closing body, the edge of the hanging link suddenly moves out of the biting state, causing noise and the hanging link to become caught, which can cause problems.

[0005] The present invention has been made in consideration of the above circumstances, and its purpose is to provide a suspension structure for an opening / closing body that can suppress abnormal noise and malfunctions that occur when the opening / closing body is opened or closed. [Means for solving the problem]

[0006] Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments. The suspension structure of an opening / closing body according to claim 1 of the present invention is a suspension structure of an opening / closing body in which a suspension link 35 protruding from the upper end of the opening / closing body 25 is supported by the winding drum 21, A hanging drum 23 is fixed to the outer periphery of each end of the winding drum 21. The hanging drum 23 has an axial mounting hole 43 formed on the end face 24, The hanging link 35 has a connecting hole 47 drilled in a tip plate portion 45 parallel to the end face 24 of the hanging drum 23, and the connecting hole 47 is supported in the mounting hole 43 by a connecting member 49, and a base end plate portion 55 opposite the tip plate portion 45 is connected to the end of the opening / closing body 25 by a pivot pin 33, and a crank bent portion 57 is formed between the tip plate portion 45 and the base end plate portion 55, protruding from the outside of the end face 24 toward the outer peripheral surface 71 of the hanging drum 23 and offsetting the base end plate portion 55 toward the outer peripheral surface 71, The hanging drum 23 is characterized in that it has a groove 59 along the axis on an outer peripheral surface 71 with which the crank bent portion 57 comes into contact.

[0007] In this hanging structure of the opening / closing body, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer peripheral surface 71 while winding the link 31. The link 31 and slat 27 next to the hanging link 35 are wound onto the hanging drum 23, resting on the outer peripheral surface 71. As the opening / closing body 25 is wound up, the links 31 are wound on top of the hanging link 35, stacking in order. The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound onto the outer peripheral surface 71 of the hanging drum 23, the opening / closing body 25 is tightened, and the crank portion 57 is pressed against the outer peripheral surface 71 of the hanging drum 23. In the hanging structure of the opening / closing body, a groove 59 is formed in the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact. This groove 59 prevents the crank bent portion 57 of the hanging link 35 from coming into direct contact with the outer peripheral surface 71 of the hanging drum 23 even when the opening / closing body 25 is wound and tightened. The crank bent portion 57 has an axis-parallel plate portion 67. The groove 59 is provided with a groove width that does not allow contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the hanging link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so the outer peripheral surface 71 is not scratched and the scratches are not caught on. In this manner, in the hanging structure of the opening / closing body, the crank bent portion 57 does not come into direct contact with the hanging drum 23, which prevents the edge 69 of the hanging link 35, which is made of steel, from coming into contact with the outer peripheral surface 71 of the hanging drum 23, which is made of aluminum, over time, and scratching the outer peripheral surface 71. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, eliminating noise and malfunctions caused by snagging.

[0008] The suspension structure of an opening / closing body according to claim 2 of the present invention is a suspension structure of an opening / closing body in which a suspension link 35 protruding from the upper end of the opening / closing body 25 is supported by the winding drum 21, A hanging drum 23 is fixed to the outer periphery of each end of the winding drum 21. The hanging drum 23 has an axial mounting hole 43 formed on the end face 24, The hanging link 35 has a connecting hole 47 drilled in a tip plate portion 45 parallel to the end face 24 of the hanging drum 23, and the connecting hole 47 is supported in the mounting hole 43 by a connecting member 49, and a base end plate portion 55 opposite the tip plate portion 45 is connected to the end of the opening / closing body 25 by a pivot pin 33, and a crank bent portion 57 is formed between the tip plate portion 45 and the base end plate portion 55, protruding from the outside of the end face 24 toward the outer peripheral surface 71 of the hanging drum 23 and offsetting the base end plate portion 55 toward the outer peripheral surface 71, The hanging drum 23 is characterized in that it has a buffer material 61 on its outer peripheral surface 71 with which the crank bent portion 57 comes into contact.

[0009] In this hanging structure of the opening / closing body, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer peripheral surface 71 while winding the link 31. The link 31 and slat 27 next to the hanging link 35 are wound onto the hanging drum 23, resting on the outer peripheral surface 71. As the opening / closing body 25 is wound up, the links 31 are wound on top of the hanging link 35, stacking in order. The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound onto the outer peripheral surface 71 of the hanging drum 23, the opening / closing body 25 is tightened, and the crank portion 57 is pressed against the outer peripheral surface 71 of the hanging drum 23. In the hanging structure of the opening / closing body, a buffer material 61 is provided on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact. Even when the opening / closing body 25 is wound and tightened, this buffer material 61 prevents the crank bent portion 57 of the hanging link 35 from coming into direct contact with the outer peripheral surface 71 of the hanging drum 23. The crank bent portion 57 has an axis-parallel plate portion 67. The cushioning material 61 is provided with an area that does not come into contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the hanging link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so the outer peripheral surface 71 is not scratched and the scratches do not get caught on it. In this manner, in the hanging structure of the opening / closing body, the crank bent portion 57 does not come into direct contact with the hanging drum 23, which prevents the edge 69 of the hanging link 35, which is made of steel, from coming into contact with the outer peripheral surface 71 of the hanging drum 23, which is made of aluminum, over time, and scratching the outer peripheral surface 71. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, eliminating noise and malfunctions caused by snagging.

[0010] The suspension structure of an opening / closing body according to claim 3 of the present invention is a suspension structure of an opening / closing body in which a suspension link 35 protruding from the upper end of the opening / closing body 25 is supported by the winding drum 21, A hanging drum 23 is fixed to the outer periphery of each end of the winding drum 21. The hanging drum 23 has an axial mounting hole 43 formed on the end face 24, The hanging link 35 has a connecting hole 47 drilled in a tip plate portion 45 parallel to the end face 24 of the hanging drum 23, and the connecting hole 47 is supported in the mounting hole 43 by a connecting member 49, and a base end plate portion 55 opposite the tip plate portion 45 is connected to the end of the opening / closing body 25 by a pivot pin 33, and a crank bent portion 57 is formed between the tip plate portion 45 and the base end plate portion 55, protruding from the outside of the end face 24 toward the outer peripheral surface 71 of the hanging drum 23 and offsetting the base end plate portion 55 toward the outer peripheral surface 71, The hanging drum 23 has a groove 59 along the axis on an outer peripheral surface 71 with which the crank bent portion 57 comes into contact, and a buffer material 61 is provided in the groove 59.

[0011] In this hanging structure of the opening / closing body, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer peripheral surface 71 while winding the link 31. The link 31 and slat 27 next to the hanging link 35 are wound onto the hanging drum 23, resting on the outer peripheral surface 71. As the opening / closing body 25 is wound up, the links 31 are wound on top of the hanging link 35, stacking in order. The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound onto the outer peripheral surface 71 of the hanging drum 23, the opening / closing body 25 is tightened, and the crank portion 57 is pressed against the outer peripheral surface 71 of the hanging drum 23. In the hanging structure of the opening / closing body, a groove 59 is formed along the axis on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, and a buffer material 61 is provided in the groove 59. Even when the opening / closing body 25 is wound and tightened, the groove 59 and the buffer material 61 prevent the crank bent portion 57 of the hanging link 35 from coming into direct contact with the outer peripheral surface 71 of the hanging drum 23. The crank bent portion 57 has an axis-parallel plate portion 67. The groove 59 and the buffer material 61 are provided with a groove width that prevents contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the hanging link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so the outer peripheral surface 71 is not scratched and the scratch is not caught on. In this manner, in the hanging structure of the opening / closing body, the crank bent portion 57 does not come into direct contact with the hanging drum 23, which prevents the edge 69 of the hanging link 35, which is made of steel, from coming into contact with the outer peripheral surface 71 of the hanging drum 23, which is made of aluminum, over time, and scratching the outer peripheral surface 71. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, eliminating noise and malfunctions caused by snagging.

[0012] The suspension structure for an opening / closing body according to claim 4 of the present invention is the suspension structure for an opening / closing body according to claim 2 or 3, The cushioning material 61 is characterized by being grease.

[0013] In this hanging structure of the opening / closing body, the buffer material 61 is grease. By applying grease to the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 of the hanging link 35 comes into contact, the axis-parallel plate portion 67 of the crank bent portion 57 slides and is less likely to get caught. In addition, the grease can disperse the winding force when the opening / closing body 25 is wound around the hanging drum 23.

[0014] The suspension structure for an opening / closing body according to claim 5 of the present invention is the suspension structure for an opening / closing body according to claim 2 or 3, The buffer material 61 is characterized in that it is a sliding member made of a material having a sliding surface.

[0015] In this hanging structure of the opening / closing body, the buffer material 61 is a sliding member made of a material with a sliding surface. The hanging link 35 is provided with a sliding member on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, so that the axis-parallel plate portion 67 of the crank bent portion 57 slides on the sliding member and is less likely to get caught. In addition, the sliding member can disperse the winding force when the opening / closing body 25 is wound around the hanging drum 23.

[0016] The suspension structure for an opening / closing body according to claim 6 of the present invention is the suspension structure for an opening / closing body according to claim 2 or 3, The buffer material 61 is characterized by being an elastic member made of a flexible material.

[0017] In this hanging structure for an opening / closing body, the buffer material 61 is an elastic member made of a flexible material. The hanging link 35 is provided with elastic deformation on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, thereby absorbing and mitigating the impact when the axis-parallel plate portion 65 of the crank bent portion 57 comes into contact with the outer peripheral surface 71. This makes the outer peripheral surface 71 less likely to be scratched, and the crank bent portion 57 is less likely to get caught on scratches on the outer peripheral surface 71. [Effects of the Invention]

[0018] According to the hanging structure of the opening / closing body described in claim 1 of the present invention, the crank bent portion of the hanging link is prevented from digging into the outer surface of the hanging drum, thereby suppressing abnormal noise and malfunctions that occur when the opening / closing body is opened or closed.

[0019] According to the hanging structure of the opening / closing body described in claim 2 of the present invention, a cushioning material is provided on the outer peripheral surface of the hanging drum with which the crank bent portion comes into contact, thereby mitigating the impact when the axis-parallel plate portion of the crank bent portion comes into contact with the outer peripheral surface, and suppressing abnormal noise and malfunctions that occur when the opening / closing body is opened or closed.

[0020] According to the hanging structure of the opening / closing body described in claim 3 of the present invention, a groove is formed along the axis on the outer peripheral surface of the hanging drum with which the crank bent portion comes into contact, and a buffer material is provided in the groove, so that the axis-parallel plate portion of the crank bent portion is less likely to come into contact with the outer peripheral surface, and if it does come into contact, the impact can be mitigated by the sliding member provided in the groove, and abnormal noise and malfunctions that occur when the opening / closing body is opened or closed can be more effectively suppressed.

[0021] According to the suspension structure of the opening / closing body described in claim 4 of the present invention, the cushioning material is grease, so that by simply applying grease to the outer peripheral surface of the suspension drum with which the crank bent portion comes into contact, shock absorption can be easily and inexpensively achieved, and abnormal noises and malfunctions that occur when the opening / closing body is opened or closed can be suppressed.

[0022] According to the hanging structure of the opening / closing body described in claim 5 of the present invention, the buffer material is a sliding member made of a material with a slippery surface, which reduces the frictional resistance of the outer surface of the hanging drum with which the crank bent portion comes into contact, allowing the crank bent portion to slide, and suppressing abnormal noise and malfunctions that occur when the opening / closing body is opened or closed.

[0023] According to the suspension structure of the opening / closing body described in claim 6 of the present invention, the buffer material is an elastic member made of a flexible material, which absorbs and mitigates the impact force when the crank bent portion comes into contact with the outer peripheral surface, making it less likely for the axis-parallel plate portion to bite into the outer peripheral surface, thereby suppressing abnormal noise and malfunctions that occur when the opening / closing body is opened or closed. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a front view showing the entire shutter device having a suspension structure for an opening / closing body. [Figure 2] FIG. [Figure 3] (a) is a front view of the opening / closing body, and (b) is a side view of (a). [Figure 4] FIG. 10 is an enlarged exploded perspective view of the main parts of the hanging drum and the hanging link. [Figure 5](a) is a plan view of the suspension link, (b) is a side view of (a), and (c) is a perspective view of (b) seen from diagonally below to the right. [Figure 6] (a) is a side view of the hanging drum with the link wound around it, and (b) is a cross-sectional view taken along the line AA in (a). [Figure 7] (a) is a diagram showing the operation of the hanging link during tightening, (b) is a side view of (a), and (c) is a BB cross-sectional view of (b). DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the entire shutter device 11 having a suspension structure for an opening / closing body. The opening / closing body hanging structure according to this embodiment can be suitably used for a shutter device 11 such as a window shutter. The shutter device 11 is broadly divided into a storage section 13 for the opening / closing body 25 and a frame body. The storage section 13 stores the opening / closing body 25, which opens and closes an opening in a building wall, in a rollable manner. The storage section 13 is formed in a roughly rectangular parallelepiped shape that is long in the width direction of the opening. The storage section 13 is attached to the building by having both longitudinal side surfaces fixed to the building wall by a pair of brackets 15.

[0026] The frame body is attached to the building wall so as to surround the sash frame attached to the opening in the building wall. The frame body has a horizontal lower frame 17 attached to the building wall below the sash frame, a pair of left and right vertical frames (not shown) whose lower ends are fixed to the left and right ends of the lower frame 17 and which are attached vertically to the building wall across the width of the opening, and a lintel (not shown) which is an upper frame that connects the upper ends of the pair of left and right vertical frames by fixing them to each other at both ends in the longitudinal direction. The pair of left and right vertical frames include guide rails 19 into which both sides of the opening / closing body 25 are inserted to guide the lifting and lowering of the opening / closing body 25.

[0027] The suspension structure for the opening / closing body includes a cylindrical winding drum 21 that rotates around a fixed shaft (not shown) that serves as the axis, and cylindrical hanging drums 23 that are fitted onto both ends of the winding drum 21 so as not to be able to rotate relative to each other and to which the upper end of the hanging part of the opening / closing body 25 is connected, winding the opening / closing body 25 onto the outer periphery. The winding drum 21 is formed with a length (e.g., 2 m) that spans the width of the opening, but the hanging drum 23 is formed shorter (e.g., 200 mm). The winding drum 21 and the hanging drum 23 can be manufactured from extruded aluminum.

[0028] FIG. 2 is an enlarged perspective view of the main part of the opening / closing body 25. As shown in FIG. In this embodiment, the opening and closing body is a blind-structured shutter curtain 25. The blind-structured shutter curtain 25 is configured with horizontally long slats 27 arranged one above the other. Each slat 27 has a shaft-like protrusion 29 that protrudes in the longitudinal direction from the top of both longitudinal ends.

[0029] The shutter curtain 25 is configured like a blind, with shaft-like protrusions that protrude from both ends of the slats 27 and are connected to adjacent shafts above and below by links 31. The shaft-like protrusions 29 of the slats 27 are connected to the links 31 so as to be rotatable about pivot pins 33. The uppermost link of the shutter curtain 25 serves as the hanging link 35. In other words, the hanging link 35 protrudes upward from the left and right sides of the upper end of the shutter curtain 25 (see Figure 3). The hanging link 35 is structured so as to move away from the hanging drum 23 when the shutter curtain 25 is closed. The hanging link 35 is formed in a curved shape so as not to interfere with the other links 31 when the shutter curtain 25 is wound up (in a wound state).

[0030] Each slat 27 is rotatably connected to a link 31, and with the shutter curtain 25 in contact with the bottom frame 17 of the opening, it can swing about a pivot pin 33 between a closed position that closes the opening and an open position that opens part of the opening. This allows the shutter curtain 25 to operate as a so-called blind shutter. By swinging the slats 27, the shutter curtain 25 with a blind structure can block views from outside while letting in light and breezes.

[0031] FIG. 3(a) is a rear view of the opening / closing body 25, and (b) is a side view of (a). A pair of left and right link connectors that connect the shaft-like protrusions 29 that protrude from both ends of the slats 27 vertically engage with the guide rails 19. When the shutter curtain 25 engages with the guide rails 19, the stopper 37 for preventing swallowing faces the outdoors 39, and its back face faces the indoors 41. The shutter curtain 25 has a hanging link 35 that protrudes from the top end that is supported by the take-up drum 21 via the hanging drum 23 (see Figure 6).

[0032] In the hanging structure of the opening / closing body, the opening / closing body is not limited to the shutter curtain 25 with a blind structure. The opening / closing body 25 may also be an ordinary slat curtain, sheet curtain, panel curtain, etc. that does not have a blind structure.

[0033] FIG. 4 is an enlarged exploded perspective view of the main parts of the hanging drum 23 and the hanging link 35. The hanging drum 23 has a mounting hole 43 formed in the direction along the axis, opening at the end face 24. In this specification, the axis is approximately the same as the central axis of rotation of the winding drum 21. As described above, the hanging drum 23 is an extruded aluminum member, and therefore, by making the axial direction the extrusion direction, the mounting hole 43 opening at the end face 24 can be easily formed.

[0034] On the other hand, the hanging link 35 is made of steel sheet metal or the like, and has a tip plate portion 45 that is parallel to the end surface 24 of the hanging drum 23. A connecting hole 47 is drilled in the tip plate portion 45. The hanging link 35 is supported in the mounting hole 43 by a pin 51 (see Figure 6) of a connecting member 49 through this connecting hole 47. The connecting hole 47 is formed as an elongated hole that runs along the circumferential direction of the hanging drum 23. The hanging drum 23 and the hanging link 35 can move relative to each other in the winding direction and the unwinding direction within the distance that the pin 51 moves within the connecting hole 47.

[0035] The connecting member 49 has the above-mentioned pin 51 (see FIG. 6) that passes through the connecting hole 47 from the outside of the hanging link 35 and is inserted into the mounting hole 43. A restricting portion 53 (see FIG. 6) that extends parallel to the end face 24 of the hanging drum 23 is connected to the base end of the pin 51 on the side opposite the insertion direction. An insertion plate portion (not shown) that is inserted into the inside of the hanging drum 23 is connected to the end of the restricting portion 53 opposite the pin 51. A female-threaded fixing hole is formed in the insertion plate portion in a direction that passes through the plate thickness. The fixing hole is fastened to the outer circumferential surface 71 by a fixing device such as a screw that is inserted through a through hole (not shown) drilled in the outer periphery of the hanging drum 23.

[0036] The hanging link 35 has a connecting hole 47 supported in the mounting hole 43 by a pin 51 of a connecting member 49. The hanging link 35 has a base end plate 55 on the opposite side of the tip plate 45 connected to the end of the shutter curtain 25 by a pivot pin 33 (see Figure 2). Between the tip plate 45 and the base end plate 55 is formed a crank bent portion 57 that protrudes from the outside of the end face 24 of the hanging drum 23 towards the outer peripheral surface 71 of the hanging drum 23 and offsets the base end plate 55 towards the outer peripheral surface 71.

[0037] Meanwhile, in this embodiment, the hanging drum 23 has a groove 59 along the axis on the outer peripheral surface 71 with which the crank bent portion 57 comes into contact. Because the hanging drum 23 is an extrusion molded product, the groove 59 along the axis can be easily formed. In this embodiment, grease, which serves as a buffer material 61, is applied to this groove 59.

[0038] As another modification of the hanging drum 23, only the groove 59 may be formed without the buffer material 61. The groove 59 may be a bottomed groove, or may be formed by cutting out the hanging drum 23. Furthermore, the hanging drum 23 may not have the groove 59, and only the buffer material 61 may be provided on the outer peripheral surface 71 with which the crank bent portion 57 comes into contact. The buffer material 61 may also be a sliding member made of a material with a sliding surface, for example, a hard resin material with a small coefficient of friction such as Teflon (registered trademark) resin, or the same material as the hanging link 35 or a hard metal material. Furthermore, the buffer material 61 may also be an elastic member made of a flexible and highly elastic material.

[0039] 5(a) is a plan view of the suspension link 35, (b) is a side view of (a), and (c) is a perspective view of (b) seen from diagonally below to the right. As shown in FIG. 5(a), the hanging link 35 is formed by bending a support piece 63, on which the link 31 rests during winding (see FIG. 6), at a right angle to the base end plate portion 55. As shown in FIG. 5(b), a through hole 65 into which the pivot pin 33 is inserted is drilled at the end of the base end plate portion 55. As shown in FIG. 5(c), the hanging link 35 has a crank bent portion 57 that contacts the outer peripheral surface 71 of the hanging drum 23 and is formed with an axis-parallel plate portion 67. Of the plate end faces of the hanging link 35 where this axis-parallel plate portion 67 faces the outer peripheral surface 71, an edge 69 (ridge portion) that intersects with one plate surface is a portion that is likely to bite into the outer peripheral surface 71. Note that the edge that intersects with the other plate surface can also be a factor in biting.

[0040] FIG. 6(a) is a side view of the hanging drum 23 around which the link 31 is wound, and (b) is a cross-sectional view taken along the line AA in (a). In the suspension structure of the opening / closing body, the shutter curtain 25 has vertically connected links 31 (i.e., a link connecting body) that are wound and overlapped around the outer periphery of the suspension drum 23, as shown in Fig. 6(a). When the shutter curtain 25 is unwound in the vertical direction, the link 31 has a U-shaped horizontal cross section that opens toward the slats 27, as shown in Fig. 2.

[0041] As shown in FIG. 6(b), the link 31 has a U-shape with a pair of opposing pieces 32 bent toward the slat 27 formed on the front and rear sides of a plane parallel to the end face 24 (the front and rear sides of the shutter curtain 25, the top and bottom positions in FIG. 6(b)). Meanwhile, the base end side of the hanging link 35 has an inverted L-shape with a base end plate portion 55 that contacts the outer circumferential surface 71 and a mounting piece 63 bent perpendicularly from the base end plate portion 55. The base end plate portion 55 of the hanging link 35 contacts along the outer circumferential surface 71 as a leg that supports the mounting piece 63. When the hanging drum 23 rotates, the first layer of the link 31 rests on the mounting piece 63, and then the opposing pieces 32 are sequentially brought into contact with each other and wound around the hanging drum 23 in a lap.

[0042] 7(a) is a diagram showing the operation of the hanging link 35 during tightening, (b) is a side view of (a), and (c) is a BB cross-sectional view of (b). The shutter curtain 25 is wound up onto the hanging drum 23 from a state in which it is closing the opening (being unwound). When the shutter curtain 25 is completely wound up, a stopper 37 provided on the seat plate at the end of the winding direction hits the curtain entrance near the lintel, restricting further winding. At this time, the shutter curtain 25 is wound up tight onto the hanging drum 23 until the opening / closing machine stops at a predetermined timing. This removes play in the winding direction of the shutter curtain 25 at each connecting part.

[0043] The force caused by this tightening and the load that is gradually applied when the shutter curtain 25 is wound up generate a predetermined tension T shown in Figure 7(a) in the shutter curtain 25, which causes it to be pulled in the opposite direction to the winding direction. In addition, the weight of each slat 27 that is wound and stacked in layers is also applied toward the center of the winding. When tension T acts on the suspension link 35, elastic deformation occurs in the direction a that extends the crank bent portion 57 and in the shear direction b of the pin 51. In Figure 7, the state before deformation is shown by a two-dot chain line, and the state after deformation is shown by a solid line.

[0044] 7(b) and 7(c), this elastic deformation causes the crank bent portion 57 of the hanging link 35 to be displaced relative to the outer peripheral surface 71 of the hanging drum 23. Meanwhile, on the outer peripheral surface 71 of the hanging drum 23, a groove 59 and a buffer material 61 are located in an area facing the range of displacement of the crank bent portion 57. As a result, the groove 59 and the buffer material 61 prevent contact and the outer peripheral surface 71 from being scraped, thereby preventing the hanging link 35 from getting caught on the scratches.

[0045] Next, the operation of the above-described configuration will be described.

[0046] In the hanging structure of the opening / closing body according to this embodiment, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer circumferential surface 71 as the link 31 is wound. The link 31 and slat 27 next to the hanging link 35 are wound onto the outer circumferential surface 71 of the hanging drum 23. As the shutter curtain 25 is wound up, the links 31 are wound up on top of the hanging link 35, stacking in order.

[0047] The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound up on the outer circumferential surface 71 of the hanging drum 23, the shutter curtain 25 is wound up and the crank portion 57 is pressed against the outer circumferential surface 71 of the hanging drum 23.

[0048] In the hanging structure of the opening / closing body, a groove 59 is formed, for example, on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact. Even when the shutter curtain 25 is wound up, this groove 59 acts as a so-called relief, so that the crank bent portion 57 of the hanging link 35 does not come into direct contact with the outer peripheral surface 71 of the hanging drum 23.

[0049] The crank bent portion 57 has an axis-parallel plate portion 67. The groove 59 is provided with a groove width that does not allow contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the hanging link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so the outer peripheral surface 71 is not scratched and the scratches are not caught on.

[0050] In this manner, in the hanging structure of the opening / closing body, the crank bent portion 57 does not come into direct contact with the hanging drum 23, which prevents the edge 69 of the hanging link 35, which is made of steel, from coming into contact with the outer peripheral surface 71 of the aluminum hanging drum 23 over time, digging into the outer peripheral surface 71 and scratching it. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, eliminating noise and malfunctions caused by snagging.

[0051] In addition, in the hanging structure of this opening / closing body, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer peripheral surface 71 as it winds up the link 31. The link 31 and slat 27 next to the hanging link 35 are wound onto the hanging drum 23, resting on the outer peripheral surface 71. As the shutter curtain 25 is wound up, the links 31 are wound up on top of the hanging link 35, stacking up in order.

[0052] The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound up on the outer circumferential surface 71 of the hanging drum 23, the shutter curtain 25 is wound up and the crank portion 57 is pressed against the outer circumferential surface 71 of the hanging drum 23.

[0053] In the hanging structure of the opening / closing body, as an example, a buffer material 61 is provided on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact. Even when the shutter curtain 25 is wound up, this buffer material 61 prevents the crank bent portion 57 of the hanging link 35 from coming into direct contact with the outer peripheral surface 71 of the hanging drum 23.

[0054] An axis-parallel plate portion 67 is formed in the crank bent portion 57. The cushioning material 61 is provided with an area that does not come into contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the suspension link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so the outer peripheral surface 71 is not scratched and the scratches are not caught on it.

[0055] In this hanging structure for the opening / closing body, the crank bent portion 57 does not come into direct contact with the hanging drum 23, so over time, the edge 69 of the steel hanging link 35 comes into contact with the outer peripheral surface 71 of the aluminum hanging drum 23, digging into the outer peripheral surface 71 and preventing scratches on the outer peripheral surface 71. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, preventing noise and malfunction due to snagging. As a result, the provision of the buffer material 61 on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact can mitigate overload and impact when the axis-parallel plate portion 67 of the crank bent portion 57 comes into contact with the outer peripheral surface 71, thereby preventing abnormal noise and malfunction that occur when the shutter curtain 25 opens and closes.

[0056] Furthermore, in the hanging structure of this opening / closing body, the hanging link 35 is offset from the end face 24 of the hanging drum 23 toward the outer circumferential surface 71 as it winds up the link 31. The link 31 and slat 27 next to the hanging link 35 are wound onto the hanging drum 23, resting on the outer circumferential surface 71. As the shutter curtain 25 is wound up, the links 31 are wound up on top of the hanging link 35, stacking up in order.

[0057] The hanging link 35 has a bent crank portion 57 bent midway to offset the link 31. When the next link 31 and slat 27 are wound up on the outer circumferential surface 71 of the hanging drum 23, the shutter curtain 25 is wound up and the crank portion 57 is pressed against the outer circumferential surface 71 of the hanging drum 23.

[0058] In the hanging structure of the opening / closing body, a groove 59 is formed along the axis on the outer peripheral surface 71 of the hanging drum 23 with which the bent crank portion 57 comes into contact, for example, and a buffer material 61 is provided in the groove 59. Even when the shutter curtain 25 is wound up, the groove 59 and the buffer material 61 prevent the bent crank portion 57 of the hanging link 35 from coming into direct contact with the outer peripheral surface 71 of the hanging drum 23.

[0059] An axis-parallel plate portion 67 is formed in the crank bent portion 57. The groove 59 and the buffer material 61 are provided with a groove width that prevents contact with at least the edge 69 of this axis-parallel plate portion 67. The axis-parallel plate portion 67 and the bent portions connected to both ends of the hanging link 35, which are the largest factors in scraping the outer peripheral surface 71, do not come into contact with the outer peripheral surface 71, so they do not bite into the outer peripheral surface 71, do not scratch the outer peripheral surface 71, and do not get caught on the scratches.

[0060] In this way, with the hanging structure of the shutter curtain 25, the crank bent portion 57 does not directly contact the hanging drum 23, which prevents the edge 69 of the steel hanging link 35 from coming into contact with the outer peripheral surface 71 of the aluminum hanging drum 23 over time and scratching the outer peripheral surface 71. This allows the hanging link 35 to smoothly separate from the hanging drum 23 at the intended position, preventing noise and malfunction due to jamming or catching. As a result, a groove 59 is formed along the axis on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, and a buffer material 61 is provided in the groove 59. This makes it difficult for the axis-parallel plate portion 67 of the crank bent portion 57 to come into contact with the outer peripheral surface 71. Even if contact does occur, the sliding member provided in the groove 59 can mitigate overloads and impacts, more effectively suppressing abnormal noise and malfunctions that occur when the shutter curtain 25 is opened or closed.

[0061] Furthermore, in this hanging structure of the opening / closing body, the buffer material 61 is grease. By applying grease to the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 of the hanging link 35 comes into contact, the axis-parallel plate portion 67 of the crank bent portion 57 slides, preventing jamming and making it less likely to get caught. Furthermore, the grease can disperse the force of winding when the shutter curtain 25 is wound around the hanging drum 23. As a result, because the buffer material 61 is grease, simply applying grease to the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact can easily and inexpensively provide a buffer effect against overloads and impacts, suppressing abnormal noise and malfunctions that occur when the shutter curtain 25 opens and closes.

[0062] Furthermore, in this hanging structure of the opening / closing body, the buffer material 61 is a sliding member made of a material with a sliding surface. The hanging link 35 is provided with a sliding member on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, so that the axis-parallel plate portion 67 of the crank bent portion 57 slides on the sliding member and is less likely to get caught. The sliding member also disperses the force of winding when the shutter curtain 25 is wound around the hanging drum 23. As a result, because the buffer material 61 is a sliding member made of a material with a sliding surface, frictional resistance on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact is reduced, allowing the crank bent portion 57 to slide. This prevents the crank bent portion 57 from getting caught, suppressing abnormal noise and malfunctions that occur when the shutter curtain 25 opens and closes.

[0063] Furthermore, in this hanging structure of the opening / closing body, the buffer material 61 is an elastic member made of a flexible material. The hanging link 35 is provided with elastic deformation on the outer peripheral surface 71 of the hanging drum 23 with which the crank bent portion 57 comes into contact, thereby absorbing and mitigating the impact when the axis-parallel plate portion 67 of the crank bent portion 57 comes into contact with the outer peripheral surface 71. This makes the outer peripheral surface 71 less likely to be scratched, and the crank bent portion 57 is less likely to get caught on scratches on the outer peripheral surface 71. As a result, because the buffer material 61 is an elastic member made of a flexible material, it absorbs and mitigates the impact force when the crank bent portion 57 comes into contact with the outer peripheral surface 71, making it less likely that the axis-parallel plate portion 67 will bite into the outer peripheral surface 71, thereby suppressing abnormal noise and malfunctions that occur when the shutter curtain 25 is opened or closed.

[0064] Therefore, according to the hanging structure of the opening / closing body of this embodiment, the crank bent portion 57 of the hanging link 35 is prevented from digging into the outer surface 71 of the hanging drum 23, thereby suppressing abnormal noises and malfunctions that occur when the shutter curtain 25 is opened or closed. [Explanation of symbols]

[0065] 21... Winding drum 23...Hanging drum 24…End face 25...Opening and closing body (shutter curtain) 33...Pivot pin 35...Hanging link 43...Mounting hole 45...Tip plate 47...Connection hole 49...Connecting member 55...Base end plate part 57...Crank bend 59...Groove 61...Cushioning material (grease, sliding material, elastic material) 71...Outer surface

Claims

1. A suspension structure for an opening / closing body in which a suspension link protruding from the upper end of the opening / closing body is supported by a winding drum, A hanging drum is fixed to the outer periphery of each end of the winding drum, The suspension drum has an axially extending mounting hole formed on its end surface, The hanging link has a connecting hole drilled in a tip plate portion parallel to the end surface of the hanging drum, and the connecting hole is supported by a connecting member in the mounting hole, and the base end plate portion opposite the tip plate portion is connected to the end of the opening / closing body by a pivot pin, and a crank bent portion is formed between the tip plate portion and the base end plate portion, protruding from the outside of the end surface toward the outer peripheral surface of the hanging drum and offsetting the base end plate portion toward the outer peripheral surface, The suspension structure for an opening / closing body is characterized in that the suspension drum has a groove along the axis on the outer surface with which the crank bent portion contacts.

2. A suspension structure for an opening / closing body in which a suspension link protruding from the upper end of the opening / closing body is supported by a winding drum, A hanging drum is fixed to the outer periphery of each end of the winding drum, The suspension drum has an axially extending mounting hole formed on its end surface, The hanging link has a connecting hole drilled in a tip plate portion parallel to the end surface of the hanging drum, and the connecting hole is supported by a connecting member in the mounting hole, and the base end plate portion opposite the tip plate portion is connected to the end of the opening / closing body by a pivot pin, and a crank bent portion is formed between the tip plate portion and the base end plate portion, protruding from the outside of the end surface toward the outer peripheral surface of the hanging drum and offsetting the base end plate portion toward the outer peripheral surface, The suspension structure for an opening / closing body is characterized in that the suspension drum has a cushioning material on its outer surface with which the crank bent portion comes into contact.

3. A suspension structure for an opening / closing body in which a suspension link protruding from the upper end of the opening / closing body is supported by a winding drum, A hanging drum is fixed to the outer periphery of each end of the winding drum, The suspension drum has an axially extending mounting hole formed on its end surface, The hanging link has a connecting hole drilled in a tip plate portion parallel to the end surface of the hanging drum, and the connecting hole is supported by a connecting member in the mounting hole, and the base end plate portion opposite the tip plate portion is connected to the end of the opening / closing body by a pivot pin, and a crank bent portion is formed between the tip plate portion and the base end plate portion, protruding from the outside of the end surface toward the outer peripheral surface of the hanging drum and offsetting the base end plate portion toward the outer peripheral surface, The suspension structure for an opening / closing body is characterized in that the suspension drum has a groove along the axis on its outer surface with which the crank bent portion contacts, and a buffer material is provided in the groove.

4. 4. The suspension structure for an opening / closing body according to claim 2, wherein the buffer material is grease.

5. 4. The suspension structure for an opening / closing body according to claim 2 or 3, wherein the buffer material is a sliding member made of a material having a sliding surface.

6. 4. The suspension structure for an opening / closing body according to claim 2 or 3, wherein the buffer material is an elastic member made of a flexible material.

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