JP2012219458A - Twin type solar shading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cord suspension preventing device for preventing projection from a lifting cord hole 7 of an upper shielding material of an upper shielding material lifting cord generated when an intermediate rail is pushed up by a bottom rail in order to open upper and lower shielding materials, in a twin type solar shading device.SOLUTION: In a cord suspension preventing device 80, while a locking piece 104 is not engaged with an engaging projection 89 of a passive side gear 85 for cord suspension prevention when torque opposing a return spring 110 is imparted to an output board 100 by deadweight of an intermediate rail, the locking piece 104 is engaged with the engaging projection 89 by the return spring when the lower shielding material is raised and an intermediate rail 4 is raised by a bottom rail 6, and when a rotary base member 90 and the passive side gear 85 for the cord suspension prevention are engaged, the torque of the passive side gear 85 for the cord suspension prevention is transmitted to the output board 100, and an upper lifting cord 8 is hoisted by an upper lifting cord take-up drum 70.

Description

  The present invention relates to a twin-type solar shading device in which shielding materials are arranged above and below, and more particularly to an invention characterized by a string droop prevention device in a twin-type solar shading device. Here, the solar radiation shielding device is a pleated screen device, a shutter device, a blind device, or the like, and the shielding material is a member that shields these solar radiation, such as a pleated screen, a shutter, or a blind.

  Conventionally, in pleated screens and blinds, twin type pleated screens and blinds are known in which shielding materials (screens, shutters, etc.) are arranged separately on the upper and lower parts of an intermediate rail, and each can be moved up and down.

  Such twin-type pleated screens and blinds have a configuration in which the bottom rail is lifted, and when it hits the intermediate rail, the bottom rail is mechanically locked and regulated so that the bottom rail does not rise any further. It is known (see Patent Document 1). In such screens and blinds, the intermediate rail is raised to the top and then the bottom rail is raised to the top.

  Moreover, if the above-mentioned mechanical regulation is not performed at all, the lifting / lowering cords loosen and come out of the lifting / lowering cord holes of the upper shielding material. However, configurations with such specifications are also known.

  In a blind equipped with a lifting / lowering cord and a dimming cord and capable of changing the exposure rate of the upper and lower shielding materials, if the lifting / lowering cord is wound up, the lower shielding material is raised and the bottom rail raises the intermediate bar, A configuration in which the slack of the light control cord is prevented by detecting the slack of the light cord by the slack detection means and winding the light adjustment cord in conjunction with the winding operation by the gear mechanism that engages based on this detection. Known (see Patent Documents 2 and 3).

JP-A-2005-207161 JP 2010-101069 A JP 2010-112049 A

  In the twin-type solar shading device, as the lower shielding material and the bottom rail are raised, if the upper shielding material rises together with the middle rail, the lifting cord that raises and lowers the upper shielding material as described above This causes a problem that it comes out of the lifting cord hole of the upper shielding material.

  Therefore, as disclosed in Patent Document 2, the lifting / lowering cord is wound in conjunction with the winding operation via the looseness detection means and the gear mechanism that engages based on the detection of the looseness detection means. It is also conceivable to adopt a configuration that prevents looseness.

  However, in the configuration in which loosening is prevented by the meshing operation of the gear mechanism, the operation is not necessarily stable due to the meshing state of the gear, the gear strength, etc., and there is room for improvement, and by providing the gear mechanism, The overall structure is large, and there is room for improvement in terms of compactness and design.

  The present invention aims to solve the above-described conventional problems. In the twin-type solar radiation shielding device, while the lower shielding material and the bottom rail are raised, both the intermediate rail and the intermediate rail are raised. It is an object of the present invention to realize a twin-type solar radiation shielding device including a string drooping prevention device that prevents the upper shielding material lifting / lowering cord from protruding from the lifting / lowering cord hole of the upper shielding material even if the upper shielding material is pushed up.

  In order to solve the above problems, the present invention provides a head box, an upper shielding member suspended from the head box and lifted by an upper lifting code, an intermediate rail attached to the lower end of the upper shielding member, and an upper end of the intermediate rail. Is a solar shading device comprising a lower shielding material that is lifted and lowered by a lower lifting cord, and a bottom rail attached to the lower end of the lower shielding material, the head box includes an upper lifting cord winding drum and A lower lifting / lowering cord winding drum, a pulley operation driving device, an upper lifting / lowering drive shaft connected to the pulley operation driving device to rotate the upper lifting / lowering cord winding drum, and a lower lifting / lowering cord winding connected to the pulley operation driving device. A lower lifting drive shaft for rotating the drum and a string droop prevention device are provided, and the pulley operation drive device operates the operation cord. Thus, it is possible to selectively rotate either the upper elevating drive shaft or the lower elevating drive shaft via the pulley, and the string hanging prevention device is connected to the lower elevating drive shaft via the one-way clutch. A driving side gear for preventing drooping provided, a passive side gear for preventing drooping that always meshes with the driving side gear for drooping prevention, a rotating base member that rotates integrally with the upper lifting drive shaft, An output panel, and a return spring that is mounted between the rotary base member and the output panel and biases the output panel in one direction with respect to the rotary base member. It is connected to the drum, and can be rotated via the rotating base member by the upper lifting drive shaft, and can be rotated by the lower lifting drive shaft when the rotating base member and the passive side gear for preventing string hanging are engaged. This is a simple structure Providing solar shading device comprising a.

The output board has a locking piece pivotally attached to the side surface, the rotation base member has a guide groove for guiding the locking piece on the side surface facing the output board, and the passive side gear for preventing string hanging is It has an engaging projection that can be engaged with and disengaged from the locking piece, and when the rotating force against the return spring is applied to the output panel by the weight of the intermediate rail, the locking piece is a passive side gear for preventing string hanging. When the lower shielding material is raised and the intermediate rail is raised by the bottom rail, the locking piece is engaged with the engaging protrusion by the return spring, and the rotating base member and the passive side for preventing the drooping of the string. When the gear is engaged, it is preferable that the rotational force of the passive side gear for preventing drooping is transmitted to the output panel, and the upper lifting cord is wound up by the upper lifting cord winding drum.

  The passive side gear for preventing drooping has a boss portion, and a rim spring is wound around the boss portion, and one end of the boss portion is attached to the passive side gear. When rotating the upper lifting / lowering cord in the direction to wind up the upper lifting / lowering cord winding drum via the member and the output panel, it becomes a boss part, allowing the rotation of the passive side gear for preventing drooping, and the direction opposite to the above direction It is preferable that the rotation of the passive side gear for preventing drooping is stopped by expanding and contacting the sleeve provided around the boss portion.

  The pulley operation driving device preferably includes a lower lifting one-way clutch that transmits rotation in one direction by the pulley and an upper lifting one-way clutch that transmits rotation in the other direction by the pulley.

  The lower elevating drive shaft and the upper elevating drive shaft are provided with a lower elevating stopper device and an upper elevating stopper device, respectively, and the lower elevating stopper device is coaxially fixed to the lower elevating drive shaft. Lower elevating cam shaft having a lower elevating cam groove on the surface, lower elevating cam case rotatably supporting the lower elevating cam shaft and having a lower elevating vertical groove on the inner peripheral surface, and lower elevating cam groove And an upper elevating stopper device, which is rotated by a pulley and has an upper elevating cam groove, and an upper elevating cam shaft. An upper elevating drive shaft cam case having an upper elevating vertical groove on the inner peripheral surface, an upper elevating cam groove and a rolling element that rolls the upper elevating vertical groove, and an operation code Operation of the lower shielding material and upper shielding material. It is preferably a start or stop possible and is to configure the drop wood.

  In the twin-type solar shading device of the present invention, when the bottom rail is raised to open the lower shielding material and the upper shielding material, even if the intermediate rail is pushed up, the upper shielding material lifting / lowering cord can be This prevents the upper shield material from protruding from the lifting / lowering cord hole, which not only improves the design and appearance but also causes the protruding / lowering cord to contact or entangle with surrounding members and obstacles. Can prevent problems from occurring.

It is a figure explaining the whole structure of the Example of the twin type solar radiation shielding apparatus of this invention, (a) is a top view which shows the structure of a head box, (b) is a front view. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the stopper apparatus of the Example of the twin type solar radiation shielding apparatus of this invention, (a) is a figure explaining the relative structure with the drive shaft for an upper part and a lower part raising, (b) is a lower part. It is an expanded view of the raising / lowering cam groove (an upper raising / lowering cam groove is the same structure). It is a figure which shows the twin winding drum apparatus and the string droop prevention apparatus of the Example of the twin type solar radiation shielding apparatus of this invention, (a) is a top view of the state except the case of the string droop prevention apparatus, b) is a sectional view. It is an exploded view of the string droop prevention apparatus of the Example of the twin type solar radiation shielding apparatus of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the structure and effect | action of an output board and a locking piece of the Example of the twin type solar radiation shielding apparatus of this invention, (a) is a perspective view, (b), (c) is from a pulley side. It is a figure explaining the relative structure of the output board and latching piece which looked, and an effect | action. It is the figure seen from the pulley and the other side explaining the structure and the effect | action of the passive side gear for string drooping prevention of the Example of the twin type solar radiation shielding apparatus of this invention, a rotation base member, and a lock | rock top, (a) Is a passive side gear for preventing drooping, (b) is a diagram showing a state in which the rotary base member is fitted to the passive side gear for preventing drooping, (c), (d) are further locked It is a figure which shows the state which integrated the frame. It is a figure explaining the string drooping prevention apparatus of the Example of the twin type solar radiation shielding apparatus of this invention, (a) is a perspective view, (b) is sectional drawing. It is a perspective view explaining the 2nd curtain simultaneous fall prevention mechanism of the Example of the twin type solar radiation shielding apparatus of this invention, (a) shows the state which removed the braking sleeve, (b) shows the assembled state. Show It is a figure explaining the effect | action of the Example of the twin type solar radiation shielding apparatus of this invention. It is a figure explaining the effect | action of the Example of the twin type solar radiation shielding apparatus of this invention.

  EMBODIMENT OF THE INVENTION The form for implementing the twin type solar radiation shielding apparatus which concerns on this invention is demonstrated below with reference to drawings based on an Example.

  The twin-type solar shading device of the present invention is a pleated screen device, a shutter device, a blind device, etc., and the shielding material is a member that shields these solar radiations, such as a pleated screen, a shutter, a blind. In the following embodiments, a twin type pleated screen device will be described as a twin type solar radiation shielding device of the present invention.

  FIG. 1 is a diagram for explaining the overall configuration of an embodiment of a twin-type solar radiation shielding device according to the present invention and the arrangement of the string droop prevention device in the overall configuration, and FIG. 1 (a) shows the configuration in the head box. It is a top view explaining an outline and Drawing 1 (b) is a front view.

  As shown in FIG. 1B, the twin-type solar radiation shielding device 1 includes a head box 2, an upper shielding material 3 suspended from the head box 2, an intermediate rail 4 attached to the lower end of the upper shielding material 3, A lower shielding member 5 having an upper end attached to the intermediate rail 4 and a bottom rail 6 attached to the lower end of the lower shielding member 5 are provided.

  The upper shielding material 3 and the lower shielding material 5 are respectively formed with lifting code holes 7 on the left and right. The lower shielding cord elevating cord 8 (referred to herein as “upper elevating cord”) has a lower end attached to the intermediate rail 4 and extending upward toward the head box 2 through the elevating cord hole 7. The lower shielding material elevating cord 9 (referred to herein as “lower elevating cord”) has a lower end attached to the bottom rail 6 and extending upward toward the head box 2 through the elevating cord hole 7.

  In the head box 2, an upper elevating drive shaft 21 and a lower elevating drive shaft 22 are arranged in parallel at the front and rear positions. One end portion of the head box 2 is provided with a pulley operation drive device 23 for driving the upper elevating drive shaft 21 and the lower elevating drive shaft 22, and further, the upper elevating drive shaft 21 and the lower elevating drive shaft. The shaft 22 is provided with an upper elevator stopper device 24 and a lower elevator stopper device 25. A twin winding drum device 26 that is rotationally driven by the driving force of the upper lifting drive shaft 21 and the lower lifting drive shaft 22 is provided on the left and right.

  The pulley operation drive device 23 is a device that pulls an operation cord 30 formed of a loop-shaped ball chain and rotationally drives the upper lifting drive shaft 21 and the lower lifting drive shaft 22. In this embodiment, the upper elevating drive shaft 21 and the lower elevating drive shaft 22 rotate in opposite directions.

  The pulley operation drive device 23 includes a pulley, a rotational force transmission mechanism 32, and a one-way clutch 33, as shown in FIGS. An operation cord 30 is hung on the pulley 31, and a pulley gear 31 ′ is fixed coaxially. The rotational force transmission mechanism 32 includes a lower driving gear 35 and an upper driving gear 36 that mesh with the pulley gear 31 ′ via the intermediate gear 29.

  The one-way clutch 33 is connected to the output shaft 37 of the lower driving gear 35, and a lower lifting one-way clutch 38 that transmits the rotation only in the first direction (for example, clockwise direction) to the lower lifting drive shaft 22. The upper drive gear 36 includes an upper lift one-way clutch 41 that is connected to the output shaft 40 of the upper drive gear 36 and transmits the rotation only in the second direction (for example, the counterclockwise direction) to the upper lift drive shaft 21.

  In such a pulley operation driving device 23, the operation cord 30 is pulled in one direction, and the pulley 31 and the pulley gear 31 ′ are rotated, for example, clockwise (in the direction in which the clock hand rotates), via the intermediate gear 29. Thus, the lower driving gear 35 can be rotated clockwise, and the lower lifting drive shaft 22 can be rotated clockwise via the lower lifting one-way clutch 38.

  Further, by pulling the operation cord 30 in the opposite direction, the pulley 31 and the pulley gear 31 'are rotated counterclockwise, for example, the upper driving gear 36 is rotated counterclockwise via the intermediate gear 29, and the upper The upper elevating drive shaft 21 can be rotated clockwise through the driving gear 36 and the upper elevating one-way clutch 41.

  The upper lifting / lowering stopper device 24 and the lower lifting / lowering stopper device 25 are respectively provided in the middle of the upper lifting / lowering driving shaft 21 and the lower lifting / lowering driving shaft 22. Since the upper elevating stopper device 24 and the lower elevating stopper device 25 have the same configuration, the reference numerals of the respective components are described as the same reference numerals, and the configuration will be described below in the lower elevating stopper device 25.

  As shown in FIG. 2A, the lower lift stopper device 25 rotatably supports the lower lift cam shaft 50 coaxially fixed to the lower lift drive shaft 22 and the lower lift cam shaft 50. A lower elevating cam case 51. The lower elevating cam shaft 50 has a lower elevating cam groove 52 formed on the outer peripheral surface thereof.

  The lower elevating cam case 51 is formed with a longitudinal groove 53 linearly in the axial direction on the inner peripheral surface thereof. The lower elevating cam case 51 is fixed to the head box 2. A ball-shaped rolling element 54 is slidably inserted into the lower elevating cam groove 52 and the vertical groove 53 of the lower elevating cam case 51.

  FIG. 2B is a development view of the outer peripheral surface of the lower elevating cam shaft 50. As shown in FIG. 2B, the lower elevating cam groove 52 is a circle of the lower elevating cam shaft 50. Endless left end groove 55 and right end groove 56 extending in the circumferential direction, and a connecting groove 57 extending in the circumferential direction between left end groove 55 and right end groove 56, one end connected to left end groove 55 and the other end connected to right end groove 56. And one end is connected to the connecting groove 57 and the other end is connected to the right end groove 56, and has a V-shaped groove 58 formed in a V-shape and a recess 59 formed in a corner portion in the middle of the V-shaped groove 58.

  Note that the pulley operation drive device 23 and the upper and lower stopper devices 24 and 25 are not the main features that characterize the twin-type solar radiation shielding device of the present invention. For example, Japanese Patent Application No. 2010-216590 has filed a separate application for an invention relating to a pulley operation drive device and a stopper device.

  The twin take-up drum device 26 corresponds to the upper elevating drive shaft 21 and the lower elevating drive shaft 22, respectively, as shown in FIGS. 1 (a), 3 (a), 3 (b), etc. A cord winding drum 70 and a lower lifting / lowering cord winding drum 71 are provided.

  Between the upper and lower stopper devices 24 and 25 and the twin winding drum device 26, as shown in FIG. 1, a string drooping prevention device 80, which is a characteristic configuration of the present invention, is disposed. FIG. 3A shows a plan view of the outer appearance of the string droop prevention device 80, FIG. 3B shows a cross-sectional view thereof, and FIG. The string droop prevention device 80 has a case 81 composed of left and right half-cuts that can be engaged and disengaged, and a mechanism portion of the string droop prevention device 80 is disposed in the case 81.

  The mechanism part of the string droop prevention device 80 will be described with reference to FIGS. The lower elevating drive shaft 22 extends to and is coupled to the lower elevating cord winding drum 71 and transmits the rotation of the lower elevating drive shaft 22. A bearing 82 is fixed to the lower elevating drive shaft 22, and a drive side gear 84 is attached to the bearing 82 through a one-way clutch 83 so as to prevent the string from hanging. The one-way clutch 83 transmits the rotational force to the drive-side gear 84 for preventing drooping only when the lower elevating drive shaft 22 and the bearing 82 rotate in one direction (for example, clockwise).

  A passive side gear 85 for preventing drooping is provided which is coaxial with the upper lifting drive shaft 21 and is relatively rotatable. The passive side gear 85 for preventing drooping includes a pair of fan-shaped boss portions 86, a gear portion 87, and a cylindrical portion 88 on the base end side. Engagement protrusions 89 are formed on the cylindrical portion 88 at four circumferentially equal intervals on the inner peripheral surface thereof. The engagement protrusion 89 protrudes toward the center of the cylindrical portion 88 and extends along the axial direction.

  The upper elevating drive shaft 21 is provided with a rotating base member 90 that is coaxial and always rotates integrally. The rotation base member 90 is provided so as to be relatively rotatable with respect to the passive side gear 85 for preventing drooping in the cylindrical portion 88 of the passive side gear 85 for preventing drooping. The rotating base member 90 has a boss portion 91 and a disc portion 92 integrally formed, and a hexagonal section of the upper elevating drive shaft 21 is inserted into a hexagonal hole 93 that passes through the axis of the boss portion 91. ing.

  Flat portions 95 are formed on both sides of the disk portion 92 (on the side in the width direction of the solar shading device) on both sides of the central thick strip 94. In these flat portions 95, guide grooves 96 that are long grooves are formed along the thick strip 94, respectively.

  An output panel 100 is provided which is positioned inside the rotation base member 90 (center side in the width direction of the solar shading device), is rotatably fitted to the boss portion 91, and is rotatable with respect to the upper lifting drive shaft 21. ing. A drive rod 101 is coaxially attached to the end of the upper lifting / lowering cord winding drum 70. The output panel 100 is connected to the drive rod 101 of the upper lifting / lowering cord winding drum 70 via a meshing portion 102 formed on the inner side (center side in the width direction of the solar shading device).

  Projecting shafts 103 are respectively provided on the upper and lower side surfaces of the output panel 100 (outside in the width direction of the solar shading device), and the locking pieces 104 are fitted into the upper and lower projecting shafts 103 respectively. Combined and pivoted. Long and thin ribs 106 are formed on the side surfaces of the upper and lower locking pieces 104 on the outer side (the outer side in the width direction of the solar shading device) along the longitudinal direction (see FIG. 5). As shown in FIG. 7B, the rib 106 is slidably fitted in the guide groove 96 of the disc portion 92 of the rotation base member 90.

  6 (c), 6 (d), and 7 (b), the upper and lower locking pieces 104 are also illustrated with ribs 106 on the inner side surfaces (the width direction center side of the solar shading device). However, this shows an example in which it is formed on both side surfaces of the locking piece 104 in consideration of assembly according to the rotation direction of the output panel 100 (parts commonality).

  The locking piece 104 configured as described above can rotate around the protruding shaft 103 with respect to the output board 100 and can slide with respect to the disc portion 92. Further, the locking piece 104 includes a hook portion 107 at the distal end portion of which the locking piece 104 can be engaged with the engagement protrusion 89 of the rotation base member 90.

  A return spring 110 made of a ring-shaped torsion spring is wound around the outer periphery of the boss portion 90 of the rotation base member 90. One end of the return spring 110 is fixed to the output panel 100, and the other end is fixed to the rotary base member 90.

  As shown in FIGS. 5C and 6D, the return spring 110 urges the output board 100 to rotate in one direction with respect to the rotary base member 90, thereby locking the output board 100. The top 104 is protruded outward from the rotation base member 90 so that the top 104 can be engaged with the engagement protrusion 89 of the cylindrical portion 88 of the passive side gear 85 for preventing the drooping of the piece 104.

  FIGS. 7A and 7B are views showing a state in which the rotating member 90 and the locking piece 104 are accommodated in the cylindrical portion 88 of the passive side gear 85 for preventing string drooping. In the state of FIG. 7A, the rotational force of the return spring 110 is urged to the output panel 100, and the locking piece 104 is rotated by the rotation base member 90 as shown in FIGS. 5C and 6D. The hook portion 107 is engaged with the engagement protrusion 89. In short, the locking piece 104 is configured to be able to appear and retract from the rotating member 90.

  As shown in FIG. 8A, a coiled tight spring 111 is wound around the outer periphery of the fan-shaped boss portion 86 of the passive side gear 85 for preventing string drooping, and a braking sleeve 112 is further wound on the outer periphery thereof. The strap 113 (see FIG. 10B) is attached to the boss portion of the case 81 of the string droop prevention device. One end of the interference spring 111 is fixed to the fan-shaped boss portion 86.

  When the fan-shaped boss portion 86 rotates in one direction (counterclockwise in this embodiment), the tight spring 111 is contracted with respect to the outer peripheral surface of the fan-shaped boss portion 86, and the brake sleeve 112 and the tight spring 111 are The gap 113 is widened (see FIG. 10C), and the passive side gear 85 for preventing drooping can be rotated.

  However, when the fan-shaped boss portion 86 rotates in the reverse direction (clockwise in this embodiment), the tight spring 111 expands outward and abuts against the sleeve 112 (see FIG. 10D), The passive side gear 85 for preventing string drooping is restrained from rotating. By performing such an operation, the tight spring 111 and the brake sleeve 112 function as a “two-curtain simultaneous lowering prevention mechanism” that prevents the upper shielding material 3 and the lower shielding material 5 from being simultaneously lowered, as will be described later. .

(Function)
The operation of the embodiment of the solar radiation shielding apparatus of the present invention having the above-described configuration will be described below with a focus on the string hanging prevention apparatus 80. 9 and 10 are diagrams schematically showing the solar shading device 1 for explaining the operation.

(1) When raising the lower shielding member In FIG. 9, when the operation cord 30 is pulled in one direction (the direction of the solid line arrow in FIG. 9) and the pulley 31 is rotated clockwise, the pulley gear 31 ′, the intermediate gear 29, The lower elevating drive shaft 22 rotates clockwise through the lower driving gear 35 and the lower elevating one-way clutch 38. When the lower elevating drive shaft 22 rotates, the lower elevating cord winding drum 71 concentrically fixed thereto rotates in the winding direction and raises the lower shielding member 5.

  When the lower elevating drive shaft 22 is rotated clockwise, the bearing 82 fixed to the lower elevating drive shaft 22 is rotated together, and the drive side gear 84 for preventing string hanging is rotated clockwise via the one-way clutch 83. In addition, the passive side gear 85 for preventing the drooping of the string rotates counterclockwise.

  By the way, the output board 100 is originally set so that the locking piece 104 protrudes outward from the disc portion 92 of the rotating base member 90 by the return spring 110 as shown in FIGS. 5 (c) and 6 (d). It is energized.

  However, since the rotating force against the urging force of the return spring 110 acts on the output panel 100 due to the weight of the intermediate rail 4 (see the wavy arrow in FIG. 9), FIG. 5 (b) and FIG. 6 (c). As shown in FIG. 5, the locking piece 104 is held at a position that falls within the range of the disc portion 92 via the protruding shaft 103. Accordingly, the passive side gear 85 for preventing the drooping of the string is idled counterclockwise without being blocked by the locking piece 104.

  When the lower elevating drive shaft 22 is rotated clockwise by pulling the operation code 30 in one direction, the lower elevating cam groove 52 in the lower elevating cam shaft 50 is used in the lower elevating stopper device 25. The rolling element 54 rolls and moves in the right end groove 56 and in the vertical groove 53 of the lower lifting cam shaft 50. When the hand is released, the rolling element 54 enters the V-shaped groove 58 from the right end groove 56 and stops at the recess 59. As a result, the rotation of the lower elevating drive shaft 22 is stopped, and the lowering of the lower shielding member 5 is stopped halfway.

(2) When lowering the lower shielding material When the operation cord 30 is slightly pulled in one direction (the direction indicated by the solid line in FIG. 9) and then released, the rolling element 54 in the lower lifting stopper device 20 The V-shaped groove 58 and the connecting groove 57 roll from the recess 59 of the cam groove 52 and enter the left end groove 55.

  Then, the lower lifting / lowering cord winding drum 71 and the lower lifting / lowering drive shaft 22 can be rotated counterclockwise by the weight of the lower shielding member 5, and the lower shielding member 5 is lowered. When the lower elevating drive shaft 22 rotates counterclockwise, the bearing 82 rotates together. However, the counterclockwise rotation is transmitted to the drive-side gear 84 for preventing drooping by the one-way clutch 83. do not do.

(3) Raising the upper shielding material When the operation cord 30 is pulled in the other direction (the direction of the dotted arrow in FIG. 9), the pulley 31 is rotated counterclockwise in FIG. As a result, the upper elevating drive shaft 21 rotates counterclockwise via the pulley gear 31 ′, the intermediate gear 29, the upper driving gear 36, and the upper elevating one-way clutch 41. When the upper elevating drive shaft 21 rotates, the output board 100 rotates counterclockwise via the rotation base member 90 concentrically fixed thereto, and the upper elevating cord winding drum 70 rotates in the winding direction, The upper shielding material 3 is raised.

  The rib 106 of the locking piece 104 is fitted in the guide groove 96 of the rotating base member 90, and the locking piece 104 is pivotally attached to the output panel 100 by the protruding shaft 103. The output panel 100 rotates as a unit.

  At this time, since the rotational force against the urging force of the return spring 110 is acting on the output panel 100 due to the weight of the intermediate rail 4 (see the wavy arrow in FIG. 9), the locking piece 104 is interposed via the protruding shaft 103. Is held at a position that falls within the range of the disc portion 92, as shown in FIGS. 5 (b) and 6 (c).

  For this reason, the output board 100 and the rotation base member 90 are idled without being engaged with the passive side gear 85 for preventing drooping. Therefore, the rotation of the output board 100 and the rotary base member 90 is caused by the lower lifting drive shaft 22 via the passive side gear 85 for preventing drooping, the driving side gear 84 for preventing drooping, the one-way clutch 83 and the bearing 82. There is no such thing as being transmitted to.

(4) When lowering the upper shielding material When the operation cord 30 is slightly pulled in the other direction (the direction of the dotted arrow in FIG. 9) and then released, the rolling element 54 is moved upward and downward in the upper lifting stopper device 24. The V-shaped groove 58 and the connecting groove 57 roll from the recess 59 in the cam shaft 50 and enter the left end groove 55.

  Then, the upper lifting / lowering cord winding drum 70, the output panel 100, and the rotation base member 90 can be rotated clockwise by the weight of the upper shielding member 3. At this time, the rotating force against the urging force of the return spring 110 is acting on the output panel 100 due to the weight of the intermediate rail 4 (see the wavy arrow in FIG. 9). As shown in FIGS. 5B and 6C, 104 is held at a position that falls within the range of the disc portion 92.

  For this reason, the output board 100 and the rotation base member 90 idle in the clockwise direction without being engaged with the passive side gear 85 for preventing drooping. Therefore, the rotation of the output board 100 and the rotary base member 90 is caused by the lower lifting drive shaft 22 via the passive side gear 85 for preventing drooping, the driving side gear 84 for preventing drooping, the one-way clutch 83 and the bearing 82. There is no such thing as being transmitted to.

(5) When the lower shielding material is raised and the bottom rail hits the intermediate rail If the operation of (1) is continued, the lower shielding material 5 rises, the bottom rail 6 hits the intermediate rail 4, and the intermediate rail 4 is moved upward. lift. Then, normally, the upper lifting / lowering cord 8 is slackened and falls out of the lifting / lowering cord hole 7 of the upper shielding member 3, but the string drooping prevention device 80 of the present invention operates as follows to To prevent.

  That is, when the bottom rail 6 hits the intermediate rail 4 and lifts the intermediate rail 4 upward, the tension due to the weight of the intermediate rail 4 is reduced. Then, the output disc 100 tilts counterclockwise with respect to the rotary base member 90 by the elasticity of the return spring 110 as shown in FIGS. 5C and 10A. Thereby, as shown in FIGS. 6 (d) and 10 (a), the locking piece 104 moves outward along the guide groove 96 of the disk portion 92 of the rotating base member 90 and protrudes. The portion 107 engages with the engagement protrusion 89 of the cylindrical portion 88 of the passive side gear 85 for preventing string hanging.

  When the operation cord 30 continues to be pulled down in one direction (the solid line direction in FIG. 10A), the drive side gear 84 for preventing the drooping rotates clockwise as in the operation of the above (1), The passive drive gear 85 for preventing drooping rotates counterclockwise.

  Therefore, as described above, when the locking piece 104 protrudes outward from the rotation base member 90 and the hook portion 107 engages with the engagement protrusion 89 of the passive side gear 85 for preventing drooping, it prevents string drooping. The rotary base member 90 and the output panel 100 rotate counterclockwise together with the passive side gear 85, rotate the upper lift cord winding drum 70 counterclockwise, wind the upper lift cord 8, and Take up the slack of the lifting cord and prevent the string from drooping.

(6) When simultaneously lowering the lower shielding material and the upper shielding material and then simultaneously lowering the operation cord 30 while pulling down the operation cord 30 in one direction (solid line direction in FIG. 10A) and performing the above operation (5) The passive side gear 85 for preventing drooping rotates counterclockwise, and the tight spring 111 contracts to tighten around the fan-shaped boss portion 86, so that the passive side gear 85 for preventing drooping continues to rotate.

  Then, when the lower shielding material 5 and the upper shielding material 3 are simultaneously lifted, when the hand is released from the operation cord 30, the lower lifting stopper device 25 performs the same operation as the operation described in the above (1). As a result, the rolling element 54 stops at the recess 59 of the V-shaped groove 58. Then, when the operation cord 30 is slightly pulled in one direction (solid line direction in FIG. 10) and then released, the rolling element 54 in the lower lifting stopper device 25 is moved from the concave portion 59 of the lower lifting cam to the V-shaped groove. 58, the connecting groove 57 rolls and enters the left end groove 55.

  Then, the lower shielding material 5 and the upper shielding material 3 try to descend simultaneously by their own weight. However, in the string droop prevention device 80 of the present invention, when the upper shielding member 3 is lowered, the locking piece 104 is engaged with the engagement protrusion 89 of the cylindrical portion 88 of the passive side gear 85 for string droop prevention. Therefore, the passive side gear 85 for preventing the drooping together with the output panel 100 and the rotation base member 90 simultaneously rotates clockwise.

  Then, the tight spring 111 expands with respect to the fan-shaped boss portion 86 and comes into contact with the brake sleeve 112 so as to press the brake sleeve 112 so that braking is applied. As a result, the upper shielding material 3 does not descend. In short, when the lower shielding material 5 and the upper shielding material 3 are simultaneously lifted, when the hand is released from the operation cord 30, the upper shielding material 3 is braked and the descent stops immediately, and only the lower shielding material 5 is lowered. .

  Thereafter, when the bottom rail 6 is lowered and a clockwise force is applied to the output panel 100 by the weight of the intermediate rail 4, the locking piece 104 is accommodated in the disc portion 92 of the rotating base member 90, and the engagement protrusion 89 and Is released. As a result, the restraint by the passive side gear 85 for preventing the drooping is eliminated, so that the output panel 100 and the rotation base member 90 can idle in the clockwise direction, and the upper shielding member 3 is lowered by its own weight.

  Therefore, the lower shielding material 5 and the upper shielding material 3 do not descend simultaneously. For this reason, when the lower shielding material 5 and the upper shielding material 3 are simultaneously lowered, the lower shielding material 5 and the upper shielding material are generated when the lower lifting one-way clutch 38 is stopped by the lower lifting one-way clutch 38. 3 can be prevented from being overloaded. In short, the interference spring 111 mounted around the fan-shaped boss and the sleeve positioned further outside function as a “two-curtain simultaneous lowering prevention mechanism”.

  As mentioned above, although the form for implementing the twin type solar radiation shielding apparatus which concerns on this invention was demonstrated based on the Example, this invention is not limited to such an Example, and is described in a claim It goes without saying that there are various embodiments within the scope of the technical matters stated.

  Since the twin-type solar shading device according to the present invention has the above-described configuration, it can be applied to various types of solar shading devices such as a pleated screen device, a shutter device, and a blind device.

1 Twin-type solar shading device
2 Headbox
3 Upper shielding material
4 Intermediate rail
5 Lower shielding material
6 Bottom rail
7 Lifting cord hole
8 Upper lifting code
9 Lower lifting cord
21 Drive shaft for raising and lowering the upper part
22 Lower lifting drive shaft
23 Pulley operation drive device
24 Upper-lowering stopper device
25 Lower lift mechanism
26 Twin winding drum device
29 Intermediate gear
30 Operation code
31 pulley
31 'pulley gear
32 Rotational force transmission mechanism
33 one-way clutch
35 Lower driving gear
36 Upper driving gear
37 Output shaft of lower driving gear
38 One-way clutch for lowering
40 Output shaft of upper driving gear
41 One-way clutch for upper lift
50 Lower lift camshaft (upper lift camshaft)
51 Lower Elevating Cam Case (Upper Elevating Cam Case)
52 Lower Elevating Cam Groove (Upper Elevating Cam Groove)
53 Vertical groove of lower elevating cam case (Vertical groove of upper elevating cam case)
54 Rolling elements
55 Left end groove
56 Right end groove
57 Connecting groove
58 V-shaped groove
59 Recess
70 Upper lifting cord winding drum
71 Lower lifting cord winding drum
80 String dripping prevention device
81 Case of string sag prevention device
82 Bearing
83 One-way clutch
84 Drive-side gear for preventing string sag
85 Passive side gears to prevent drooping
86 Fan-shaped boss
87 Gear part
88 Cylindrical part
89 Engagement protrusion
90 Rotating base member
91 Boss part of rotating base member
92 Disk part of rotating base member
93 Hexagonal hole in boss
94 Thick strip of disk part of rotating base member
95 Flat part of disk part of rotating base member
96 Guide groove in the disc part of the rotating base member
100 output panel
101 Driving rod for upper lifting / lowering cord winding drum
102 meshing part of output panel
103 Projection shaft of output panel
104 Locking piece
105 Locking hole
106 Locking piece rib 107 Hook
110 Return spring
111 Shimari Spring
112 Braking sleeve
113 Clearance between return spring and braking sleeve

Claims (5)

A head box, an upper shielding member suspended from the head box and lifted by an upper lifting cord, an intermediate rail attached to the lower end of the upper shielding member, and a lower portion attached to the intermediate rail and having an upper end attached to the lower lifting cord A solar radiation shielding device comprising a shielding material and a bottom rail attached to the lower end of the lower shielding material,
The head box includes an upper lifting / lowering cord winding drum, a lower lifting / lowering cord winding drum, a pulley operation driving device, an upper lifting / lowering driving shaft connected to the pulley operation driving device and rotating the upper lifting / lowering cord winding drum, A lower elevating drive shaft connected to the pulley operation drive device for rotating the lower elevating cord winding drum, and a string sag prevention device;
The pulley operation drive device can selectively rotate and drive either the upper elevating drive shaft or the lower elevating drive shaft via the pulley by operating the operation cord.
The string droop prevention device includes a drive side gear for preventing drooping provided on a lower lifting drive shaft via a one-way clutch, and a passive side gear for preventing drooping that always meshes with the drive side gear for preventing drooping. A rotation base member that rotates integrally with the upper lifting drive shaft, an output panel, and a return spring that is mounted between the rotation base member and the output panel and biases the output panel in one direction with respect to the rotation base member. And,
The output board is connected to the upper lifting / lowering cord take-up drum, can be rotated via the rotating base member by the upper lifting / lowering drive shaft, and when the rotating base member and the passive side gear for preventing string hanging are engaged. The solar shading device is configured to be rotatable by a lower lifting drive shaft. The output panel is pivotally attached to the side,
The rotating base member has a guide groove that guides the locking piece on the side surface facing the output board,
The passive side gear for preventing drooping has an engaging projection that can be engaged with and disengaged from the locking piece,
When the rotating force against the return spring is applied to the output panel due to the weight of the intermediate rail, the locking piece does not engage with the engaging protrusion of the passive side gear for preventing string hanging, but the lower shielding material rises. When the intermediate rail is raised by the bottom rail, the locking piece is engaged with the engagement protrusion by the return spring, and when the rotary base member and the passive side gear for preventing the drooping are engaged, the passive side gear for preventing the drooping of the strap is engaged. 2. The solar shading device according to claim 1, wherein the rotational force is transmitted to the output panel, and the upper lifting / lowering cord is wound up by the upper lifting / lowering cord winding drum.   The passive side gear for preventing drooping has a boss portion, and a rim spring is wound around the boss portion, and one end of the boss portion is attached to the passive side gear. When rotating the upper lifting / lowering cord in the direction to wind up the upper lifting / lowering cord winding drum via the member and the output panel, it becomes a boss part, allowing the rotation of the passive side gear for preventing drooping, and the direction opposite to the above direction 3. The structure according to claim 1 or 2, characterized in that when the rotation is to be performed, the rotation of the passive side gear for preventing string drooping is stopped by expanding and contacting a sleeve provided around the boss portion. The solar radiation shielding device described.   The pulley operation driving device includes a lower lifting one-way clutch that transmits rotation in one direction by the pulley and an upper lifting one-way clutch that transmits rotation in the other direction by the pulley. Item 4. The solar radiation shielding device according to item 1, 2 or 3. The lower elevating drive shaft and the upper elevating drive shaft are provided with a lower elevating stopper device and an upper elevating stopper device, respectively.
The lower elevating stopper device is coaxially fixed to the lower elevating drive shaft and has a lower elevating cam shaft having a lower elevating cam groove on the circumferential surface, and a lower elevating cam shaft rotatably supported on the inner circumferential surface. A lower elevating cam case having a vertical elevating groove, and a lower elevating cam groove and a rolling element that rolls in the lower elevating vertical groove. Upper elevating cam shaft having a cam groove; upper elevating drive shaft cam case having an upper elevating cam shaft rotatably supported on the inner peripheral surface; upper elevating cam groove and upper elevating cam shaft And a rolling element that rolls in the vertical groove for the operation, and the operation cord is operated to start or stop the lower shielding material and the upper shielding material from being lowered. The solar radiation shielding apparatus in any one of 4.

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