JP6666125B2 - Twin type solar shading device - Google Patents

Description

  The present invention relates to a twin-type solar shading device, for example, a twin-type pleated screen, a blind, and the like, and particularly to a twin-type solar shading device provided with a string hanging prevention device.

  Conventionally, the intermediate rail is suspended from the head box via the lifting cable for the upper part, and the bottom rail is suspended from the head box via the lifting code for the lower part. There are known twin-type solar shading devices in which a material is stretched and a lower shielding material is stretched between an intermediate rail and a bottom rail (see Patent Documents 1 to 7).

  According to such a twin-type solar shading device, the thickness of the upper shielding material and the lower shielding material, and the dimming state can be appropriately adjusted by using a combination of shielding materials having different materials such as translucency. And other functions can be realized.

  However, when the bottom rail is lifted by the lower elevating cord and the lower solar material is raised, if the intermediate rail is pushed up by the bottom rail to raise the intermediate rail, the upper elevating cord for lifting the upper solar material is loose. This causes a so-called string hanging state, which may protrude from a hole through which the elevating cord for upper part is inserted, not only has a poor appearance, but also may be caught by other members, thereby hindering operation.

  In order to solve such a problem, for example, a configuration is known in which when the bottom rail pushes up the intermediate rail during the operation of raising the upper elevating cord, the raising operation of the upper elevating cord is restricted (Patent Reference 1).

  Also, when the bottom rail pushes up the intermediate rail, the slack detecting means detects the slack of the upper lifting cord, and the interlocking means operates to link the rotation of the upper winding drum with the rotation of the lower winding drum. Thus, there is known a configuration in which a slack of an upper lifting cord is wound (see Patent Documents 2 and 3).

  Further, a configuration is known in which when the winding tension of the upper lifting cord is lost, the cam moves in the axial direction by the force of the spring, and the winding force of the lower lifting cord is transmitted to the winding of the upper lifting cord. (See Patent Document 4).

Japanese Patent No. 4423979 Japanese Patent No. 5102737 Japanese Patent No. 5107869 Japanese Patent No. 5421069 Japanese Patent No. 5666965 Japanese Patent No. 5718130 Japanese Patent No. 4982172

  The above prior art invention basically has a configuration in which a slack in the upper lifting cord is detected and the winding force of the lower lifting cord is transmitted to the upper lifting cord winding drum. Is thin and lightweight, the tension of the upper lifting / lowering cord is small, so that even if the upper lifting / lowering cord is not loose, it may be erroneously detected that slack has occurred.

  The invention of the conventional example described in Patent Literature 7 automatically rotates the lower drive shaft so that when the bottom rail is lifted, the intermediate rail separated upward from the bottom rail is also raised automatically. When the detection member detects that the intermediate rail has reached the head box, the interlock is released. Therefore, when the intermediate rail is separated from the headbox, only the bottom rail cannot be raised independently.

  An object of the present invention is to solve the problem of the conventional twin-type solar shading device described above, and to make it possible to independently raise and lower the bottom rail and the intermediate rail, and to detect a detecting means for detecting a slack of the upper lifting code. Without providing, only when the bottom rail pushes up the intermediate rail, the upper elevating cord is always wound up and the intermediate rail is also lifted, so that the upper hoisting cord has a string drip prevention device that prevents the loosening of the elevating cord. It is an object to realize a twin type solar shading device.

In order to solve the above problems of the present invention, a head box, an intermediate rail and a bottom rail suspended from the head box by an upper elevating cord and a lower elevating cord, and an upper part provided between the head box and the intermediate rail. A shielding member, a lower shielding member provided between the intermediate rail and the bottom rail, an upper take-up drum and a lower take-up drum provided in the head box, a pulley operation drive device, and a pulley operation drive device. A solar shading device comprising: an upper clutch unit and a lower clutch unit for switching between a state in which rotation is transmitted to an upper winding drum and a lower winding drum and a state in which rotation is not transmitted, and a string dripping prevention device. The cord drip prevention device comprises an upper lifting cord and a lower lifting cord, respectively, and an upper winding drum and a lower winding cord, respectively. Only when the intermediate rail and the bottom rail can be lifted and lowered independently by rolling up and rewinding with the ram, the intermediate rail abuts and overlaps the bottom rail, and the lower lift cable is wound up and the bottom rail is raised. At the same time, the upper lifting cord is also wound up by the upper take-up drum, and the intermediate rail is also raised at the same time as the bottom rail to prevent the upper lifting cord from hanging off. An upper screw shaft and a lower screw shaft that rotate in conjunction with the drum and the lower winding drum, a movable gear unit that can move in the axial direction by rotating the upper screw shaft, and a rotation of the lower screw shaft. A movable gear unit and a movable claw when the intermediate rail and the bottom rail independently move up and down. Only when the knit moves alone in the axial direction along the upper screw shaft and the lower screw shaft, and the movable gear unit and the movable claw unit abut each other and move in the axial direction at the same time, the intermediate rail and the bottom rail Provided is a solar shading device characterized in that the solar shading device rises at the same time .

  The movable gear unit includes an upper female screw piece screwed to the upper screw shaft, an upper wheel that rotates with the upper screw shaft and is axially movable with respect to the upper screw shaft, and a lower screw. A lower wheel rotatable with respect to the shaft and movable in the axial direction, an upper transmission gear rotatably supported on the upper wheel by a predetermined angle, and a driven-side engaging claw; A lower transmission gear rotatably supported and provided to mesh with the upper transmission gear, wherein the movable claw unit rotates together with the lower screw shaft and moves axially with respect to the lower screw shaft. A claw disk having a driving-side engaging claw to be driven, and a female screw piece screwed to the lower screw shaft, wherein the movable claw unit and the movable gear unit are in contact with each other so that the driving-side engaging claw and the driven side With the engaging claws engaged, lift the lower When the bottom rail is raised by winding up the screw, the rotation of the lower screw shaft is transmitted to the upper screw shaft via the lower transmission gear, the upper transmission gear, and the upper wheel, and the movable gear unit moves. It is preferable that the configuration is such that it moves in the axial direction together with the claw unit.

  A coil spring is interposed in a circumferential gap between the upper transmission gear and the upper wheel, and the upper transmission gear rotates by rotating the lower screw shaft and the lower transmission gear in a direction to raise the bottom rail. However, it is preferable that the upper wheel is not rotated by the upper transmission gear until the coil spring is compressed.

  The upper clutch unit and the lower clutch unit switch between a state in which the rotation of the pulley operation driving device is transmitted to the upper winding drum and a lower winding drum, respectively, and a state in which the rotation is not transmitted. It is preferable to have a structure that switches the material between the rolled state, the holding state, and the self-weight drop state.

  According to the present invention, the bottom rail and the intermediate rail can be individually lifted and lowered independently, and without particularly providing a detecting means for detecting the slack of the upper lifting cord, when the upper lifting cord is loosened, Only when the intermediate rail abuts on the rail and overlaps, raises the lower elevating cord, and raises the bottom rail, the upper elevating cord is automatically wound up by the upper take-up drum. With this configuration, it is possible to eliminate the slack of the upper elevating cord.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining Example of the solar radiation shielding device of the twin type which concerns on this invention, (a) is a top view and (b) shows a pulley operation drive device. It is a front view of the twin type solar shading device of the above-mentioned example. It is sectional drawing of the clutch unit for upper parts used for the solar radiation shielding apparatus of the twin type of the said Example. It is a figure for demonstrating the development view and operation | movement of the cam drum of the upper clutch unit used for the twin type solar shading apparatus of the said embodiment typically. It is a figure explaining the string hanging prevention device of the said example, (a) is an overall perspective view, (b) is a perspective view of a movable claw unit. It is an exploded perspective view of a string hanging prevention device of the above-mentioned example. It is a perspective view of the member which comprises the string hanging prevention device of the said Example, (a) shows a lower part transmission gear, (b) a nail plate, (c) shows an upper part transmission gear, an upper wheel, etc. It is a figure which illustrates typically the structure and operation of the transmission gear for upper parts, and the wheel for upper parts of the string hanging prevention device of the said Example. (A) shows the intermediate rail / upper shielding material and the bottom rail / lower shielding material of the embodiment, and (b) is a diagram for explaining the configuration of the string hanging prevention device in the initial setting state in the state of (a). It is. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device. (A) and (c) show the operating states of the intermediate rail and upper shielding material and the bottom rail and lower shielding material of the above embodiment, and (b) and (d) show the operating states of (a) and (c). It is a figure explaining composition and operation of a cord hanging prevention device.

  An embodiment for implementing a twin type solar shading device according to the present invention will be described below based on an embodiment with reference to the drawings.

  The twin type solar shading device according to the present invention is a solar shading device in which two upper and lower shielding materials suspended from a head box are switched by a single loop-shaped operation cord, and each of them is independently or together moved up and down. Yes, it is applicable to pleated screen devices, blind devices, and the like.

  In this embodiment, a configuration applied to a twin type solar shading device having twin pleated screens (a twin type pleated screen device) will be described as an example.

(overall structure)
FIG. 1 is a diagram illustrating the overall configuration of a twin-type solar shading device 1 which is an embodiment of a twin-type solar shading device according to the present invention.

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

  Elevating cord holes 7 are formed on the left and right of the upper shielding member 3 and the lower shielding member 5, respectively. The upper lifting cord 8 is attached to the intermediate rail 4 at the lower end, and extends upward toward the head box 2 through the lifting cord hole 7. The lower elevating cord 9 has a lower end attached to the bottom rail 6 and extends upward toward the head box 2 through the elevating cord hole 7.

  As shown in FIGS. 1A and 2, the head box 2 includes an upper drive shaft 11 and an upper driven shaft 12, and a lower drive shaft 13 and a lower driven shaft 14 in front and rear positions ( (Inside of the room and outside of the room).

  At one end of the head box 2, a pulley operation driving device 18 for driving the upper driving shaft 11 and the upper driven shaft 12, and the lower driving shaft 13 and the lower driven shaft 14 is provided. ing. The other end of the head box 2 is provided with a string hanging prevention device 21 that is operated by the upper driven shaft 12 and the lower driven shaft 14 and is a characteristic configuration of the present invention.

  An upper clutch unit 24 and a lower clutch unit 25 are provided between the upper drive shaft 11 and the upper driven shaft 12, and between the lower drive shaft 13 and the lower driven shaft 14, respectively. .

  The upper driven shaft 12 is provided with an upper winding drum 28 for winding the upper lifting cord 8, and the lower driven shaft 14 is a lower winding drum 29 for winding the lower lifting cord 9. Is attached. The upper driven shaft 12 and the lower driven shaft 14 are each provided with a well-known speed controller (speed control device) 30.

  The overall configuration of the present invention is as described above. In this specification, the “proximal side” is the pulley operation driving device 18 side (the right side in FIG. 1A and FIG. 2), and the “distal end side” is a string. Let it be the droop prevention device 21 side. The terms "clockwise" and "counterclockwise" refer to the direction in which the hand of the clock rotates when viewed from the base end to the distal end, and the opposite direction.

(Pulley operation drive)
The pulley operation driving device 18 is a device for pulling one side of an operation cord 33 formed of a loop-shaped ball chain to rotationally drive the upper drive shaft 11 and the lower drive shaft 13, respectively. In the first embodiment, the upper drive shaft 11 and the lower drive shaft 13 rotate in opposite directions.

  In this specification, "pull one side of the operation code 33" is used to mean one of two hanging portions of the loop-shaped operation code 33 (see a solid arrow in FIG. 2). Similarly, “pull the other side of the operation code 33” is used to mean the other of the two hanging portions of the loop-shaped operation code 33 (see the dotted arrow in FIG. 2).

  As shown in FIG. 1B, the pulley operation driving device 18 includes a pulley 34, a rotational force transmission mechanism 35, an upper one-way clutch 36, and a lower one-way clutch 37. The pulley 34 has an operation code 33 hooked thereon, and the pulley 34 is fixed coaxially. The torque transmitting mechanism 35 has an intermediate gear 38 that meshes with the pulley 34, an upper driving gear 39 and a lower driving gear 40 that mesh with the intermediate gear 38, respectively.

  The upper one-way clutch 36 receives the output of the upper driving gear 39 and transmits rotation in only one direction (for example, a counterclockwise direction) to the upper drive shaft 11. The lower one-way clutch 37 receives the output of the lower driving gear 40 and transmits the rotation only in the other direction (for example, clockwise) to the lower drive shaft 13.

  The one-way clutch incorporated as each of the upper one-way clutch 36 and the lower one-way clutch 37 uses a known one-way clutch.

  In the pulley operation driving device 18, one side of the operation cord 33 (solid arrow side in FIG. 2) is pulled to pull the pulley 34 and the intermediate gear 38 clockwise as viewed from the right side in FIG. , The upper drive gear 39 is rotated counterclockwise, and the upper drive shaft 11 is further rotated in one direction (counterclockwise) via the upper one-way clutch 36. Can be.

  When the other side (the dotted arrow side in FIG. 2) of the operation cord 33 is pulled, the pulley 34 and the intermediate gear 38 rotate counterclockwise (the direction opposite to the direction in which the clock hand rotates), and the lower prime mover is driven. The gear 40 can be rotated clockwise, and the lower drive shaft 13 can be rotated in the other direction (clockwise) via the lower one-way clutch 37.

(Clutch unit)
The upper clutch unit 24 and the lower clutch unit 25 transmit and do not transmit the rotation of the upper drive shaft 11 and the lower drive shaft 13 to the upper driven shaft 12 and the lower driven shaft 14, respectively. The function as a clutch for switching as described above and the function as a stopper for switching the upper shielding member 3 and the lower shielding member 5 to a winding state, a holding state, and a self-weight lowering state are also used.

  In this embodiment, the clutch unit which also functions as a stopper is used. However, the clutch unit controls the rotation of the upper drive shaft 11 and the lower drive shaft 13 by rotating the upper driven shaft 12 and the lower drive shaft 13. The upper shaft driven member 12 and the lower shaft 14 are separately provided with the upper shield member 3 and the lower shield member, respectively, with only a function as a clutch that switches between transmission and non-transmission to the drive shaft 14. A lifting and lowering stopper device (see Patent Literatures 5 and 6) for switching the material 5 to a rolled state, a held state, a self-weight falling state, or the like may be provided.

  The present applicant has already applied for a clutch unit that also functions as a stopper as Japanese Patent Application No. 2015-81817, and in the present embodiment, the same configuration as that of the prior invention is used. Only the following will be described.

  The upper clutch unit 24 and the lower clutch unit 25 have different rotation directions, but have substantially the same configuration. Therefore, the upper clutch unit 24 will be described with reference to FIGS. 3 and 4.

  As shown in FIG. 3, the upper clutch unit 24 includes a clutch case 45, a transmission side meshing plate 46 fixed to a tip of the upper drive shaft 11, and a spring cylinder 47 spline-connected to the upper drive shaft 11. A cam drum 51 rotatably disposed in the clutch case 45 and having a cam groove 50 formed on the peripheral surface thereof; a coil spring 52 wound around the outer periphery of the spring cylinder 47 and one end of which is engaged with the cam drum 51; A holding groove 53 formed linearly in the axial direction on the inner surface of the clutch case 45, and is movable only in the axial direction between one end and the other end of the holding groove 53 in the axial direction. The transmission includes a clutch ball 55 that moves relatively to the driving shaft 51, and a transmission-side engaging plate 48 that is spline-coupled to the upper driven shaft 12.

  The transmission-side meshing plate 48 is a member that moves in the axial direction with respect to the upper driven shaft 12, rotates with the upper driven shaft 12, and rotates with respect to the cam drum 51. When meshed with the side meshing plate 46, the rotation of the upper drive shaft 11 is transmitted to the upper driven shaft 12.

  The axial length L of the holding groove 53 is shorter than the distance D between the axially most proximal end portion and the most distal end portion of the cam groove 50 (see FIG. 4A). When the upper drive shaft 11 is rotated by pulling one side of the operation cord 33, the cam drum 51 is rotated via the spring cylinder 47 and the coil spring 52, and the cam drum 51 is in the holding groove 53 and the cam groove 50. The movement of the clutch ball 55 moves in the axial direction.

  As described above, when the cam drum 51 moves, the transmission-side meshing plate 48 also moves in the axial direction, and the transmission-side meshing plate 48 meshes with or is disengaged from the transmission-side meshing plate 46. Between the transmission and the non-transmission of the upper driven shaft 12.

  The cam groove 50 is shown in an exploded view in FIGS. 4 (a) and 4 (b). The cam groove 50 is a winding groove 56 (a dash-dotted line indicating the center thereof) formed continuously and endlessly around the periphery. ), And a release groove branched from the winding groove 56.

  The winding groove 56 has a meshing portion 57 which is convexly curved toward the tip end side (the left side in FIG. 4A) and a convex shape which is opposite to the first rotation direction (winding direction) of the cam drum 51. And a holding portion 59 that is convexly curved in the first rotation direction of the upper cam drum 51.

  The release grooves include a main release groove 63 branched from the winding groove 56 in the vicinity of the holding portion 59 and a sub release groove 65 branched from the winding groove 56 in the vicinity of the meshing portion 57 in the second rotation direction. .

  When the clutch ball 55 is relatively moved and positioned at the release portion 64 of the main release groove 63 or the sub release portion 66 of the sub release groove 65, the transmission side meshing plate 48 separates from the transmission side meshing plate 46 and moves upward. The clutch unit 24 is in a transmission release state (see FIG. 4A).

  From the release state shown in FIG. 4A, the clutch ball 55 is moved relative to the engaging portion 57 and positioned with respect to the cam drum 51 (refer to the position of the clutch ball 55 shown by the dotted line in FIG. 4B). ), The transmission-side meshing board 48 meshes with the transmission-side meshing board 46, and the upper clutch unit 24 is in the transmission state (see FIG. 4B).

  When the clutch ball 55 moves relative to the cam drum 51 and moves relative to the stop portion 58, the rotation of the cam drum 51 in the first rotation direction is restricted, but the upper drive shaft 11 and the spring cylinder 47 Then, the rotation is transmitted to the upper driven shaft 12 and the upper winding drum 28 by slipping with respect to the coil spring 52, and the upper lifting cord 8 can be wound up.

  When the operation of pulling the operation code 33 is stopped and released in the middle, the cam drum 51 rotates in the second rotation direction (clockwise) based on the own weight of the upper shielding member 3, and the clutch ball 55 moves to the holding portion 59. To position. Therefore, the rotation of the cam drum 51 in the second rotation direction (clockwise) based on the weight drop of the upper shielding member 3 is restrained, and the upper shielding member 3 is prevented from falling by its own weight, and enters a holding state in which the upper shielding member 3 does not drop.

  When the one side of the operation cord 33 is slightly pulled from the holding state, the clutch ball 55 moves from the holding portion 59 into the hoisting groove 56. When the operation of pulling the operation cord 33 is stopped halfway and released, the clutch ball 55 is moved. Enters the main release groove 63, is located at the main release portion 64, the transmission-side meshing plate 48 is separated from the transmission-side meshing plate 46, and the transmission release state of the upper drive shaft 11 and the upper driven shaft 12 is released. (See FIG. 4A).

(String drop prevention device)
The structure of the string hanging prevention device 21 will be described with reference to FIGS. As shown in FIGS. 5, 6, and 9B, the string hanging prevention device 21 includes a support case 70, an upper screw shaft 71, a lower screw shaft 72, a movable claw unit 75, and a movable gear. And a unit 76.

  As shown in FIGS. 5A, 5B, and 6, the upper screw shaft 71 and the lower screw shaft 72 are arranged in parallel with each other, and are rotatably mounted on the support case 70 at both ends. I have. The upper screw shaft 71 and the lower screw shaft 72 each have a male screw portion formed on the surface thereof, and a pair of flat portions 77 extending in the axial direction (a flat surface symmetrical with respect to the axis by 180 ° with respect to each other). ) Is formed.

  As shown in FIGS. 5A and 6, a linear guide groove 80 extending in the axial direction is formed in a portion of the bottom of the support case 70 below the lower screw shaft 72.

  The upper screw shaft 71 is connected at its base end to the upper driven shaft 12, and the lower screw shaft 72 is connected to its lower driven shaft 14 at its base end. Specifically, the upper driven shaft 12 and the lower driven shaft 14 are inserted into and coupled to the upper screw shaft 71 and the lower screw shaft 72. Accordingly, the upper screw shaft 71 and the lower screw shaft 72 rotate integrally with the upper driven shaft 12 and the lower driven shaft 14, respectively.

  The movable claw unit 75 includes a female screw piece 83 for the lower part, a claw disc 84, and a support cover 85, as shown in FIGS. The lower female screw piece 83 has a female screw hole 88 that is screwed to the lower screw shaft 72, and is screwed to the lower screw shaft 72.

  The pawl disc 84 is spline-coupled to the lower screw shaft 72, rotates together with the lower screw shaft 72, and is movable in the axial direction with respect to the lower screw shaft 72. Two arcuate drive-side engaging claws 89a and 89b are formed on the distal end surface of the claw disc 84 at intervals in the circumferential direction (see FIG. 7B). The driving-side engaging claw 89a is provided on a locus having a larger diameter in the claw disc 84 than the driving-side engaging claw 89b.

  The support cover 85 rotatably supports the nail plate 84 by the support holes 90 and is attached to the lower female screw piece 83. Guide projections 93 are formed on the lower surfaces of the support cover 85 and the lower female screw piece 83, respectively, facing downward, and are slidably fitted in the guide grooves 80 of the support case 70.

  Since the movable claw unit 75 has such a configuration, when the lower screw shaft 72 rotates, the claw disc 84 rotates together. The support cover 85 and the lower female screw piece 83 have a guide projection 93 fitted in the guide groove 80 and are prevented from rotating. The lower female screw piece 83 is screwed to the lower screw shaft 72. When the screw shaft 72 for use rotates, it moves in the axial direction.

  In short, when the lower screw shaft 72 rotates, the movable claw unit 75 moves in the axial direction as a whole, and the claw disc 84 rotates.

  As shown in FIG. 6, the movable gear unit 76 includes a lower transmission gear 95, a lower wheel 96, an upper female screw piece 97, an upper transmission gear 98, an upper wheel 99, and a base end side. A lid 100 and a tip-side lid 101 are provided. The lower transmission gear 95 and the upper transmission gear 98 are provided so as to mesh with each other.

  The lower wheel 96 is spline-coupled to the lower screw shaft 72, is rotatable with the lower screw shaft 72, and is slidable in the axial direction with respect to the lower screw shaft 72.

  The lower transmission gear 95 is rotatably fitted to the lower wheel 96. As shown in FIG. 7A, the lower transmission gear 95 has two arcuate driven side engaging claws 105a and 105b that are spaced apart in the circumferential direction on the base end surface. The driven-side engaging claw 105a is provided on a locus of a larger diameter in the lower transmission gear 95 than the driven-side engaging claw 105b.

  The driving-side engaging claw 89a of the claw disc 84 is provided on a locus having the same diameter as the driven-side engaging claw 105a of the lower transmission gear 95, and the claw disc 84 moves toward the distal end with respect to the lower screw shaft 72. During the axial movement, before the driving side engaging claw 89a and the driven side engaging claw 105a engage with each other, the base side surface of the driving side engaging claw 89a and the distal end side of the driven side engaging claw 105a. In order to avoid contact of the surfaces as much as possible, it is configured to engage with some play from rotation.

  The driving-side engaging claw 89b of the claw disc 84 is provided on a locus having the same diameter as the driven-side engaging claw 105b of the lower transmission gear 95. When the shaft moves to the side, before the driving-side engaging claw 89b and the driven-side engaging claw 105b engage with each other, the base-side surface of the driving-side engaging claw 89b and the distal end of the driven-side engaging claw 105b. In order to avoid contact of the side surfaces as much as possible, it is configured to engage with some play from rotation.

  The upper wheel 99 is spline-coupled to the upper screw shaft 71, is rotatable with the upper screw shaft 71, and is slidable in the axial direction with respect to the upper screw shaft 71. As shown in FIGS. 6, 7C, 8A, and 8B, the upper wheel 99 has an arc-shaped sliding portion 106 formed toward the distal end.

  The upper transmission gear 98 is rotatably attached to the upper wheel 99 as shown in FIGS. 8A and 8B. As shown in FIGS. 7C, 8A and 8B, an arc-shaped receiving groove 107 is formed on the inner surface of the upper transmission gear 98. The arc-shaped sliding portion 106 of the upper wheel 99 is rotatably fitted in the arc-shaped receiving groove 107.

  The arc length of the arc-shaped receiving groove 107 is formed to be longer than the arc length of the arc-shaped sliding portion 106 as shown in FIG. Therefore, when the arc-shaped sliding portion 106 of the upper wheel 99 is fitted into the arc-shaped receiving groove 107, an arc-shaped gap 110 is generated between the arc-shaped receiving groove 107 and the arc-shaped sliding portion 106. A compression coil spring 111 (see FIGS. 8A and 8B) is inserted into the gap 110 in an arcuate state.

  The lower transmission gear 95, the lower wheel 96, the upper transmission gear 98, and the upper wheel 99 are inserted between the base cover 100 and the front cover 101, and the base cover 100 and the front cover 101 are mounted. Are joined together. The lid body composed of the base side lid 100 and the distal side lid 101 joined together is guided between the front and rear side walls 112 of the support case 70 and is movable in the axial direction.

  The upper female screw piece 97 is fixed to the base end of the base side lid 100, has a female screw hole 113 screwed to the upper screw shaft 71, and is screwed to the upper screw shaft 71. . With this configuration, when the upper screw shaft 71 rotates, the upper female screw piece 97 moves in the axial direction, so that the movable gear unit 76 as a whole also moves in the axial direction.

  Since the movable gear unit 76 is configured as described above, the details will be described later in the operation. However, when the lower screw shaft 72 rotates and the lower transmission gear 95 rotates, the upper transmission gear 98 Also rotate.

  When the lower transmission gear 95 rotates clockwise, the upper transmission gear 98 starts rotating counterclockwise. As shown in FIG. 8B, when the compression coil spring 52 is sufficiently compressed, the upper transmission gear 98 is rotated. The wheel starts rotating counterclockwise together with the upper transmission gear 98.

  In short, the clockwise rotation of the lower transmission gear 95 is transmitted to the upper wheel 99 via the upper transmission gear 98 with a time lag. The rotation of the lower transmission gear 95 in the counterclockwise direction is immediately transmitted to the upper wheel 99 via the upper transmission gear 98 without a time lag (see the dotted arrow in FIG. 8A).

  The string hanging prevention device 21 itself has the configuration as described above. However, when the string hanging prevention device 21 is incorporated in the head box 2, the positions of the intermediate rail 4 and the bottom rail 6, the movable gear unit 76 and the movable claw unit Initially, the positional relationship with the position 75 is set as shown in FIGS. 9A and 9B.

  Specifically, when assembling the string hanging prevention device 21 into the headbox 2, the movable gear unit 76 is placed in a state where the intermediate rail 4 and the bottom rail 6 are at the lowermost positions as shown in FIG. As shown in FIG. 9B, the movable claw unit 75 is in a position where it contacts the base end of the support case 70, and the upper driven shaft 12 and the lower driven shaft 14 are moved upward. Into the lower screw shaft 71 and the lower screw shaft 72 for connection.

(Action)
The operation of the embodiment of the twin-type solar shading device 1 having the above-described configuration will be described with reference to FIGS.

(1) When Only the Upper Shield 3 Is Raised In FIGS. 10A and 10B, the intermediate rail 4 is lowered to the bottom rail 6 at the lowermost position, and the upper shield 3 is hung to the lowermost position. And the movable gear unit 76 is in contact with the base end of the support case 70. To raise only the intermediate rail 4 and the upper shielding member 3 from this state, one side of the operation cord 33 of the pulley operation driving device 18 is pulled.

  Then, the upper driven shaft 12 rotates in one direction (counterclockwise) through the pulley 34, the intermediate gear 38, the upper drive shaft 11, the upper one-way clutch 36, and the upper clutch unit 24 (FIG. 10 (d)). The operation of the upper clutch unit 24 by operating the operation code 33 is as described above.

  When the upper driven shaft 12 rotates in one direction, the upper lifting cord 8 is wound up by the upper winding drum 28, and the intermediate rail 4 and the upper shielding member 3 are irrespective of the bottom rail 6 and the lower shielding member 5. , Rise alone.

  Also, when the upper driven shaft 12 rotates in one direction, the upper screw shaft 71 also rotates in one direction, and the upper female screw piece 97 screwed to the upper screw shaft 71 moves to the distal end side. As shown in FIG. 10D, the movable gear unit 76 moves from the base end side to the distal end side as a whole.

  With the rotation of the upper screw shaft 71, the lower transmission gear 95 idles with respect to the lower wheel 96 via the upper wheel 99 and the upper transmission gear 98.

  Then, the operation of pulling one side of the operation cord 33 is stopped, and when the clutch ball is positioned on the holding portion 59 (see FIG. 4B) of the cam drum 51 in the upper clutch unit 24, the intermediate rail 4 and the upper shielding member 33 is held at a position in the middle of ascending as shown in FIG.

  As described above, when the upper driven shaft 12 rotates in one direction, the upper screw shaft 71 also rotates in one direction, and the upper female screw piece 97 moves to the distal end side. As shown, the movable gear unit 76 moves from the proximal end to the distal end.

  During this time, the rotation of the pulley 34 by the operation code 33 is not transmitted to the lower driven shaft 14 by the lower one-way clutch 37. Therefore, since the lower screw shaft 72 and the lower driven shaft 14 do not rotate, the lower shielding member 5 does not move up and down, and the movable claw unit 75 does not move.

(2) When only the upper shielding material 3 is lowered
When lowering only the intermediate rail 4 and the upper shielding member 3 from the state shown in FIGS. 11A and 11B, pulling one side of the operation cord 33 of the pulley operation driving device 18 slightly away from the state shown in FIG. The transmission-side meshing plate 46 and the transmission-side meshing plate 48 in the clutch unit 24 are disengaged from each other, and the upper drive shaft 11 and the upper driven shaft 14 are switched to the non-transmission state.

  As a result, the upper driven shaft 12 can idle, so that the upper shielding member 3 descends by its own weight, as shown in FIG. 11C, and the upper driven shaft 12 and the upper screw shaft 71 are moved. It rotates in the other direction (clockwise) (see FIG. 11D).

  Then, since the upper female screw piece 97 screwed to the upper screw shaft 71 moves to the base end side, the movable gear unit 76 as a whole changes from the state shown in FIG. 11A to the state shown in FIG. Move to the tip side as shown.

(3) When Only the Lower Shielding Material 5 Is Raised FIGS. 12A and 12B show a state in which the intermediate rail 4 is located above the bottom rail 6 with an interval. To raise only the bottom rail 6 and the lower shielding member 5 from this state, the other side of the operation cord 33 of the pulley operation driving device 18 is pulled.

  Then, the lower driven shaft 14 rotates in the other direction (clockwise) via the pulley 34, the intermediate gear 38, the lower one-way clutch 37, the lower drive shaft 13 and the lower clutch unit 25 (FIG. 12). (D)).

  When the lower driven shaft 14 rotates in the other direction, the lower take-up drum 29 winds up the lower elevating cord 9, and as shown in FIG. 12 (c), the bottom rail 6 and the lower shielding member 5 rise. , The lower screw shaft 72 also rotates in the other direction.

  Therefore, the lower female screw piece 83 screwed to the lower screw shaft 72 moves to the distal end side. Therefore, in the movable claw unit 75, as shown in FIG. 12D, the drive-side engagement claws 89a and 89b of the claw disc 84 engage with the driven-side engagement claws 105a and 105b of the lower transmission gear 95. Until you move to the tip side.

  During this time, the rotational force of the operation cord 33 is not transmitted to the upper driven shaft 12 by the upper one-way clutch 36, so that the upper shielding member 3 does not move up and down and the upper screw shaft 71 does not rotate. The movable gear unit 76 does not move.

(4) When lowering only the lower shielding member 5 When lowering only the bottom rail 6 and the lower shielding member 5 from the state shown in FIGS. 13A and 13B, the other of the operation codes 33 of the pulley operation driving device 18 is used. When the side is slightly pulled away, the lower clutch unit 25 separates the meshing between the transmission-side meshing plate and the transmission-side meshing plate, which are not shown, but is substantially the same as that of the upper clutch unit 24. The shaft 13 and the lower driven shaft 14 are switched to the non-transmission state.

  Therefore, the lower shielding member 5 descends by its own weight as shown in FIG. 13C, and the lower driven shaft 14 and the lower screw shaft 72 rotate in one direction (counterclockwise). Then, since the lower female screw piece 83 screwed to the lower screw shaft 72 moves to the base end side, only the movable claw unit 75 changes from the state shown in FIG. 13B to the state shown in FIG. Move to the tip side.

  In the state shown in FIGS. 13A and 13B, the driving-side engaging claws 89a and 89b of the claw disc 84 and the driven-side engaging claws 105a and 105b of the lower transmission gear 95 are engaged. I have. Therefore, as described above, when the other side of the operation cord 33 is slightly pulled to rotate the lower screw shaft 72 in the other direction in order to put the lower clutch unit 25 in the non-transmission state, the lower transmission gear 95 The upper transmission gear 98 rotates in one direction.

  However, even if the upper transmission gear 98 rotates in one direction, the rotational force is not transmitted to the upper wheel 99 until the compression coil spring 52 is sufficiently compressed. In short, a time lag occurs from the start of rotation of the lower driven shaft 14, the lower screw shaft 72, and the lower transmission gear 95 to the rotation of the upper wheel 99.

  During this time lag, the movable claw unit 75 moves to the base end side, and the engagement between the drive-side engagement claws 89a and 89b of the claw disc 84 and the driven-side engagement claws 105a and 105b of the lower transmission gear 95 is performed. Is released, and the rotation of the lower transmission gear 95 stops. Therefore, even if the other side of the operation cord 33 is slightly pulled, the rotation is not substantially transmitted to the upper wheel 99, the upper screw shaft 71, and the upper driven shaft 12, so that the upper shielding member 33 moves up and down. Can be prevented.

(5) When the upper shielding member 3 and the lower shielding member 5 are simultaneously raised From the state shown in FIGS. 14A and 14B, as shown in FIG. 14C, the upper shielding member 3 and the lower shielding member 5 Is simultaneously raised, when the other side of the operation cord 33 is pulled, the lower driven shaft 14 rotates in the other direction (clockwise), and the bottom rail 6 and the lower shield 5 rise.

  At the same time, the lower screw shaft 72 rotates in the other direction (clockwise), and the upper screw shaft 71 and the upper screw shaft 71 are moved through the claw disc 84, the lower transmission gear 95, the upper transmission gear 98, and the upper wheel 99. The driven shaft 12 rotates in one direction.

  Therefore, the upper elevating cord 8 is wound up by the upper winding drum 28, and the intermediate rail 4 and the upper shielding member 3 move up together with the lower shielding member 5. Further, when the upper female screw piece 97 moves toward the distal end with respect to the upper screw shaft 71, as shown in FIG. 14D, the movable gear unit 76 as a whole also moves toward the distal end.

  When the upper shielding member 3 and the lower shielding member 5 are simultaneously raised from the state shown in FIGS. 15A and 15B as shown in FIG. As in the case shown in FIG. 14, the lower driven shaft 14 rotates in the other direction (clockwise), and the lower shielding member 5 rises.

  At the same time, the lower screw shaft 72 is rotated in the other direction (clockwise), and the upper screw shaft 71 and the upper screw shaft 71 are driven via the claw disc 84, the lower transmission gear 95, the upper transmission gear 98, and the upper wheel 99. The driven shaft 12 rotates in one direction.

  Therefore, the lower shielding member 5 rises and the upper shielding member 3 also rises, and as shown in FIG. 14D, the upper female screw piece 97 moves to the tip end side with respect to the upper screw shaft 71, and The movable gear unit 76 also moves to the distal end side as a whole.

  As shown in FIGS. 14 and 15, when the intermediate rail 4 overlaps the bottom rail 6, when the other side of the operation cord 33 is pulled and the bottom rail 6 is raised, the upper lifting cord 8 is moved upward. Since the intermediate rail 4 and the upper shielding member 3 are raised together with the bottom rail 6 and the lower shielding member 5 by the winding drum 28, the bending of the upper lifting cord 8 can be prevented.

  In short, the feature of the present invention is that the bottom rail 6 and the intermediate rail 4 can be lifted and lowered independently of each other, and when the upper lifting cord 8 becomes loose, that is, the bottom rail 6 and the intermediate rail 4 come into contact with each other and overlap. Only when the lower elevating cord 9 is wound up and the bottom rail 6 is raised, the upper elevating cord 8 is also wound up by the upper winding drum 28 so that the upper elevating cord 8 is not bent.

  The embodiments for implementing the twin-type solar shading device according to the present invention have been described based on the embodiments. However, the present invention is not limited to such embodiments, and is described in the claims. It goes without saying that there are various embodiments within the scope of the technical matters described.

  Since the twin type solar radiation shielding device according to the present invention has the above-described configuration, the upper and lower shielding materials suspended from the head box are switched by a single loop-shaped operation cord, and each of them is individually raised and lowered. The present invention is applicable to solar shading devices such as pleated screen devices, shutter devices, and blind devices.

1 Twin type solar shading device
2 Head box
3 Upper shielding material
4 Intermediate rail
5 Lower shielding material
6 Bottom rail
7 Elevating cord hole
8 Lifting code for upper part
9 Lift code for lower part
DESCRIPTION OF SYMBOLS 11 Upper drive shaft 12 Upper driven shaft 13 Lower drive shaft 14 Lower driven shaft 18 Pulley operation drive
21 String drop prevention device
Reference Signs List 24 Upper clutch unit 25 Lower clutch unit 28 Upper winding drum 29 Lower winding drum 30 Speed controller 33 Operation code 34 Pulley 35 Rotary force transmission mechanism 36 Upper one-way clutch 37 Lower one-way clutch 38 Intermediate gear Reference Signs List 39 upper driving gear 40 lower driving gear 45 clutch case 46 transmission side meshing board 47 spring cylinder 48 transmitted side meshing board 50 cam groove 51 cam drum 52 coil spring 53 holding groove 55 clutch ball 56 winding groove 57 engaging section 58 stop section 59 Holding part 63 Main release groove 64 Main release part of main release groove 65 Secondary release groove 66 Secondary release part of secondary release groove 70 Support case
71 Upper screw shaft
72 Screw shaft for lower part
75 Movable claw unit
76 Movable gear unit
77 Flat part
80 Guide groove
83 Internal thread piece for lower part
84 Nailboard
85 Support cover
88 Female screw hole 89a, 89b of lower female screw piece Drive side engaging claw
90 Support hole of support cover
93 Guide protrusion
95 Transmission gear for lower part
96 Lower Wheel
97 Upper internal thread piece
98 Upper transmission gear
99 Upper Wheel
100 Base end lid
101 Tip side lid
105a, 105b Driven side engaging claw
106 arc-shaped sliding part
107 arc-shaped receiving groove
110 arc-shaped gap
111 Compression coil spring
112 Front and rear side walls of support case
113 Female thread hole of female thread piece for upper part

Claims (4)

A head box, an intermediate rail and a bottom rail suspended from the head box by an upper elevating cord and a lower elevating cord, an upper shielding material provided between the head box and the intermediate rail, and an intermediate rail and a bottom rail. A lower shielding member provided therebetween, an upper take-up drum and a lower take-up drum provided in a head box, a pulley operation driving device, and rotation of the pulley operation drive device for the upper take-up drum and the lower portion. An insolation shielding device including an upper clutch unit and a lower clutch unit that switch between a state of transmitting to the winding drum and a state of non-transmission, respectively, and a string hanging prevention device,
The string hanging prevention device winds up and down the upper lifting cord and lower lifting cord with the upper winding drum and the lower winding drum, respectively, and thereby enables the intermediate rail and the bottom rail to be independently liftable. When the middle rail abuts on the bottom rail and overlaps, the lifting code for the lower part is wound up, and only when raising the bottom rail, the lifting code for the upper part is also wound up by the winding drum for the upper part, and the intermediate rail is also connected to the bottom rail. It is a configuration that raises at the same time to prevent the hanging of the upper lifting cord ,
The string hanging prevention device is movable so that it can move in the axial direction by rotating the upper screw shaft and the lower screw shaft that rotate in conjunction with the upper winding drum and the lower winding drum, respectively. A gear unit, and a movable claw unit movable in the axial direction by rotating the lower screw shaft,
When the intermediate rail and the bottom rail move up and down independently, the movable gear unit and the movable claw unit move independently in the axial direction along the upper screw shaft and the lower screw shaft, respectively. The solar shading device is characterized in that the intermediate rail and the bottom rail are simultaneously raised only when they come into contact with each other and move simultaneously in the axial direction . The movable gear unit includes an upper female screw piece screwed to the upper screw shaft, an upper wheel that rotates with the upper screw shaft and is axially movable with respect to the upper screw shaft, and a lower screw. A lower wheel rotatable with respect to the shaft and movable in the axial direction, an upper transmission gear rotatably supported on the upper wheel by a predetermined angle, and a driven-side engaging claw; Rotatably supported, comprising a lower transmission gear provided to mesh with the upper transmission gear,
The movable claw unit is a nail plate that has a drive-side engagement claw that rotates together with the lower screw shaft and moves in the axial direction with respect to the lower screw shaft, and a female screw piece screwed to the lower screw shaft, With
In a state where the movable claw unit and the movable gear unit are in contact with each other and the drive side engagement claw and the driven side engagement claw are engaged with each other, the lower elevating cord is wound up to raise the bottom rail. The rotation is transmitted to the upper screw shaft via the lower transmission gear, the upper transmission gear, and the upper wheel, and the movable gear unit moves in the axial direction together with the movable claw unit. Item 2. The solar shading device according to Item 1. A coil spring is interposed in a circumferential gap between the upper transmission gear and the upper wheel, and the upper transmission gear rotates by rotating the lower screw shaft and the lower transmission gear in a direction to raise the bottom rail. 3. The solar shading device according to claim 2 , wherein the upper wheel is not rotated by the upper transmission gear until the coil spring is compressed . The upper clutch unit and the lower clutch unit switch between a state in which the rotation of the pulley operation driving device is transmitted to the upper winding drum and a lower winding drum, respectively, and a state in which the rotation is not transmitted. The solar shading device according to any one of claims 1 to 3, further comprising a configuration for switching the material between a rolled state, a holding state, and a self-weight drop state .

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