JP6709044B2 - Solar shading device - Google Patents

Description

The present invention relates to a solar radiation shielding device that raises and lowers at least one shield suspended from a head box by a loop-shaped lift operation code. Here, the solar radiation shielding device is a pleated screen device, a shutter device, a blind device, and the like, and the shielding material is a member that shields the solar radiation in these devices, and is a pleated screen, a shutter, a blind, or the like.

When the solar shading device according to the present invention is applied to a twin type solar shading device that vertically moves two shielding members suspended from a head box, two shields are operated by a single loop-shaped lifting operation code. It is possible to switch between raising and lowering any one of the materials and independently perform the raising and lowering operation.

As such two shields, for example, in a twin type solar shading device, an upper shield and a lower shield arranged vertically via an intermediate rail, or an indoor shield and an outdoor shield. There is a double shield before and after the shield.

Conventionally, in a twin-type solar shading device, a configuration in which an upper shielding member and a lower shielding member, which are vertically arranged via an intermediate rail, are switched and lifted by operating a single loop-shaped lifting operation code Is known (see Patent Document 1).

In addition, it is configured such that the dual solar shading members on the indoor side and the outdoor side can be independently pulled up by a single operation code, and the first solar shading material can be operated by operating one of the operation codes. Lifting operation, lowering operation by its own weight, and self-weight lowering prevention operation can be selected, and the first clutch unit and the first stopper unit are selected, and the second solar radiation shielding material is lifted by operating the other operation code. There is known a configuration including a second clutch unit and a second stopper unit that make it possible to select an operation, a descending operation by its own weight, and an operation for preventing its own weight from descending (see Patent Document 2).

JP, 2010-101069, A Japanese Patent No. 4119692

The clutch unit in the above-mentioned related art (Patent Document 2 and the like) enables the raising operation of the solar radiation shielding material and the lowering operation by its own weight, but it is necessary to provide a stopper unit having a stopper groove in addition to the clutch unit. However, there is a problem that the number of parts increases and the structure becomes complicated.

The present invention has an object to solve the above-mentioned conventional problems, and the operation of raising and lowering the shielding material suspended from the head box is performed only in one direction of a single loop-shaped raising and lowering operation cord. (EN) A solar shading device that can be switched by a pulling operation and can be stably operated. Further, it is possible to realize a solar shading device having a clutch unit having a function of a stopper unit and having a simple structure and a small number of parts.

In order to solve the above problems, the present invention provides a pulley operation drive device that is provided in a head box and that is rotated by an operation cord, a winding rotation shaft that raises a shielding member that hangs downward from the head box, and a pulley. A solar shading device comprising: a clutch unit that selectively switches between a transmission state in which the rotational force of the operation drive device is transmitted to the winding rotation shaft and a non-transmission state in which the rotation force is not transmitted, and the clutch unit is a pulley operation drive device. It is attached to the head box and the transmission side rotating part connected to the device and having a meshing disc, the transmission side rotating part having a meshing disc connected to the winding and rotating shaft, the cam drum having a cam groove formed on its peripheral surface. A clutch case that rotatably accommodates the cam drum, a holding groove formed linearly in the axial direction on the inner surface of the clutch case, and an axial direction within a range between one end and the other end of the holding groove in the holding groove in the axial direction. And a clutch ball that moves relative to the cam drum in the cam groove, and a movable rib that moves and rotates in the axial direction integrally with the cam drum is formed on the cam drum. The inner side of the clutch case is formed with fixed ribs that can be engaged with and disengaged from the movable ribs, and the cam groove is formed by an endless winding groove formed on the cam drum and a branch from the winding groove. And a release groove.

The winding groove has an engaging portion, a stop portion, and a holding portion, the release groove has a releasing portion, and the engaging portion is located at either the base end side or the tip end side of the cam groove. Is provided so as to be located on the other of the base end side and the tip end side of the cam groove, and the axial length of the holding groove is shorter than the axial length of the engaging portion and the releasing portion. The rotation of the transmission side rotating part causes the cam drum to rotate in one direction of rotation, and when the clutch ball comes to the meshing part, one of the transmitting side rotating part and the transmitted side rotating part is rotated. Of the other rotating part moves in a direction relatively closer to the other of the rotating parts in the axial direction to be in a meshed transmission state, and the cam drum is rotated by the rotation of the transmission side rotating portion due to the weight of the shielding material. When the clutch ball rotates to the other rotation direction opposite to the one rotation direction and the clutch ball comes to the disengagement portion, the one rotation portion moves in a direction in which the one rotation portion moves away from the other rotation portion in the axial direction. It is preferable that the structure is such that the movable state is released to release the meshed state and the non-transmitted state is established.

When the clutch ball is located at the stop, the rotation of the cam drum in one rotation direction is restrained to stop it. When the clutch ball is located at the holding part, the rotation of the cam drum in the other rotation direction is stopped and held. When the clutch ball is located at either the stop portion or the holding portion, the meshing plate of the transmitting side rotating part and the meshing plate of the transmitting side rotating part are in mesh with each other, and the movable side rib and the fixed side rib are It is preferable that the cam drum is in the engaged state and the axial movement of the cam drum is restricted to maintain the engaged state.

The clutch unit has a configuration that can be selected by operating the operation code into one of a state in which the shielding member can be raised, a state in which the shielding member can lower by its own weight, and a state in which the shielding member can be held without lowering its own weight. Is preferred.

The transmission-side rotating portion has a drive shaft that rotates by the pulley operating drive device and a clutch spring cylinder that is spline-coupled to the drive shaft and around which a clutch spring is wound. One end of the clutch spring is engaged with the cam drum. The clutch spring cylinder moves in the axial direction together with the cam drum via the clutch spring, enables the cam drum to rotate, and when the rotation of the cam drum and the clutch spring is restricted, the clutch spring cylinder does not move with respect to the clutch spring. It is preferable that it can rotate while sliding.

It is preferable that the transmitted-side rotating portion has a driven shaft that rotates together with the meshing disk of the transmitted-side rotating portion, and the driven shaft is connected to the hoisting and rotating shaft.

The stop portion is formed to be convexly curved in the other rotation direction in which the cam drum rotates, and the holding portion is formed to be convexly curved in the one rotation direction in which the cam drum rotates. Is preferably provided.

The meshing disc of the one rotating portion is a meshing disc included in the transmitted side rotating portion, and the meshing disc can be moved in the axial direction relative to the driven shaft by spline coupling to the driven shaft. It is attached and is rotatable relative to the cam drum, and is provided so as to be movable in the axial direction together with the cam drum. It is preferable that the meshing disc is fixed to the tip of the drive shaft of the transmission side rotation unit.

The meshing disc of the one rotating portion is a meshing disc of the transmitting side rotating portion, the meshing disc is fixed to the tip of the clutch spring cylinder, and the meshing disc of the other rotating portion is the transmission side. It is preferable that the rotating part is a meshing disk, and the meshing disk is fixed to the base end of the driven shaft.

Two sets of a clutch unit and a winding rotary shaft are provided, and the operation code of the pulley operation drive device is a loop, and by operating the operation code in one direction, either one of the two sets It is also possible to adopt a twin type configuration in which the rotational force is transmitted only to one of the two pairs by transmitting the rotational force to the other and operating the operation cord in the other direction .

The pulley operation drive device is configured to rotate an intermediate gear that rotates by operating an operation code, a first driving gear and a second driving gear that mesh with the intermediate gear, and rotate one of the first driving gears in one rotation direction of the two sets. A first one-way clutch for transmitting a rotational force to only one of the two sets and a second one-direction for transmitting a rotational force of the second driving gear in the other rotational direction to only the other of the two sets. A twin type configuration including a clutch may be used.

According to the solar shading device according to the present invention, it is possible to switch the raising and lowering operations of the shielding material suspended from the head box by pulling the single loop-shaped lifting operation cord in only one direction. is there.

Further, since the clutch unit having both the function as a clutch and the function as a stopper unit is provided, the number of parts is reduced and the configuration is simplified.

Further, in the state where the rotation of the first cam drum is restrained and stopped, and in the state where it is held, the movable side rib of the base end portion of the cam drum engages with the fixed side rib of the clutch case. At the time of holding, it is possible to prevent the meshing of the transmission side meshing disc and the transmission side meshing disc from being released, so that a stable winding operation and holding operation can be performed.

It is a front view explaining the whole composition of Examples 1 and 2 of the solar radiation shielding device concerning the present invention. It is a perspective view showing the appearance of the pulley operation drive of Examples 1 and 2, the 1st clutch unit, and the 2nd clutch unit. It is an exploded perspective view of the pulley operation drive device of Examples 1 and 2. FIG. 3 is a sectional view showing a first clutch unit and a second clutch unit of the first embodiment. FIG. 3 is an exploded perspective view of the first clutch unit of the first embodiment. It is a figure explaining the 1st cam drum of Example 1 and Example 2, (a) is a perspective view showing the state where a lid of a clutch case was removed, and (b) is a front view of the 1st cam drum etc. is there. It is a figure explaining the lid|cover of the clutch case of Example 1 and Example 2, (a) is a perspective view, (b) is the figure which looked at the inside from an axial direction, (c) is an axial direction. It is the figure which cut|disconnected along and looked at the inner surface. FIG. 4 is a diagram for explaining the operation in a development view of the first cam drum of the first clutch unit of the first embodiment, in which (a) shows a released state and (b) shows a meshed state. FIG. 6 is a diagram for explaining the operation in a development view of the first cam drum of the first clutch unit of the first embodiment, in which (a) shows a stopped state and (b) shows a held state. FIG. 3 is a diagram showing an engagement state between a peripheral edge rib of a first cam drum and an inner peripheral surface rib of a lid of a clutch case in a meshed state of a first clutch unit of Embodiment 1, and FIG. ) Is a view seen from the axial direction. FIG. 4 is a diagram illustrating the operation in a development view of the first cam drum of the second clutch unit of the first embodiment, in which (a) shows a released state and (b) shows a stopped state. FIG. 7 is a cross-sectional view of a first clutch unit and a second clutch unit of the second embodiment. FIG. 7 is an exploded perspective view of a first clutch unit according to a second embodiment. FIG. 9 is a diagram illustrating the operation in a development view of the first cam drum of the first clutch unit of the second embodiment, in which (a) shows a released state and (b) shows a meshed state. FIG. 9 is a diagram illustrating the operation in a development view of the first cam drum of the first clutch unit of the second embodiment, in which (a) shows a stopped state and (b) shows a held state. FIG. 10 is a diagram showing an engagement state between a peripheral edge rib of the second cam drum and an inner peripheral surface rib of the lid of the clutch case in a meshed state of the second clutch unit of the second embodiment, and FIG. ) Is a view seen from the axial direction. FIG. 9 is a diagram illustrating the operation in a development view of the second cam drum of the second clutch unit of the second embodiment, in which (a) shows a released state and (b) shows a stopped state.

A mode for carrying out a solar shading device according to the present invention will be described below based on embodiments with reference to the drawings.

A solar shading device according to the present invention is a solar shading device that operates an operation code to raise and lower a shielding member. Here, the raising of the shielding material includes various configurations such as a configuration in which an elevating cord of the shielding material is wound up and tucked up, a configuration in which the shielding material itself is wound up around a winding roller, and the like. For example, it is a solar shading device that allows a shielding material suspended from a headbox to be pulled in one direction by a single loop-shaped operation cord to wind and shield the shielding material.

Such a solar shading device according to the present invention can be applied not only to a solar shading device provided with one shielding member suspended from a head box, but also with two shielding materials suspended from a head box. It is also applicable to a twin type solar shading device which is switched by a single loop-shaped operation code and is independently moved up and down.

The two shielding members in the twin-type solar shading device include upper and lower shielding members, or a front and rear double shielding member including an indoor shielding member and an outdoor shielding member. Further, as the shielding material, it is possible to apply a tuck-up curtain (Roman shade), a pleated screen, a shutter, a blind and the like.

(Example 1)
A first embodiment of the solar radiation shielding device according to the present invention will be described below with reference to FIGS. The first embodiment has a configuration in which the present invention is applied to a twin type solar shading device, especially a twin type curtain curtain device.

overall structure:
FIG. 1 is a diagram illustrating the overall configuration of the solar radiation shielding device 1 according to the first embodiment of the present invention. As shown in FIG. 1, the solar radiation shielding device 1 includes a head box 2, a first shielding member 3 hung from the head box 2 to the outside of the room, and a second shielding member hung from the head box 2 to the inside of the room. The material 4 is provided. In the first embodiment, tuck-up curtains are provided as the first shielding material 3 and the second shielding material 4, respectively.

The head box 2 is provided with a pulley operation drive device 8 as shown in FIGS. 2 and 3 at one end (the right end in FIG. 1). A first clutch unit 9 and a second clutch unit 10, a first winding rotation shaft 13 and a second winding rotation shaft 14 as shown in FIGS. , A first winding roller 15 and a second winding roller 16 are provided.

The first clutch unit 9 and the second clutch unit 10 apply the rotational force generated by the pulley operation drive device 8 to the first winding rotation shaft 13 and the second winding rotation shaft 14, to the first winding roller 15 and the second winding roll. It is transmitted to the roller 16.

The first hoisting roller 15 and the second hoisting roller 16 wind up the first elevating cord and the second elevating cord 21 for raising the first shielding member 3 and the second shielding member 4, respectively. Since the first elevating code is located outside the room, it is not shown in FIG. 1, but the same reference numeral 21 as the second elevating code is used in the specification.

The lower ends of the first elevating cord and the second elevating cord 21 are attached to the lower ends of the first shielding member 3 and the second shielding member 4, respectively. The bottom rail provided at the lower end of the first shielding member 3 is located on the outside of the room, and thus is not shown in FIG. 1, but has the same reference numeral as the bottom rail provided at the lower end of the second shielding member 4. 22 is used in the description.

Hereinafter, the configuration of each part of the solar shading device 1 will be described. In the description of the present specification and claims, the “axial direction” is the longitudinal direction of the head box 2, and more specifically, the axes of the first drive shaft 27, the first winding rotation shaft 13, and the like, which will be described later. 1 (the left-right direction in FIG. 1), the “proximal end side” refers to the side closer to the pulley operation drive device 8 (the right end side in FIG. 1) in the axial direction, and the “tip end side” refers to the pulley operation drive device. 8 (the left end side in FIG. 1), that is, the side opposite to the base end side. Regarding the rotation direction, terms such as clockwise and counterclockwise are used when viewed from the base end side.

Pulley operation drive device:
The pulley operation drive device 8 pulls an operation cord 25 (see FIG. 1) formed of a loop-shaped (endless) ball chain, and will be described in detail later, but the first transmission-side rotating portion 26 (FIGS. 4 and 5). The first driving shaft 27 and the second driving shaft 32 of the second transmission-side rotating portion (having substantially the same configuration as the first transmission-side rotating portion 26) of FIG. In the first embodiment, the first drive shaft 27 and the second drive shaft 32 rotate in opposite directions.

As shown in FIGS. 1, 2 and 3, the pulley operation drive device 8 includes a pulley 35, an intermediate gear 36 that rotates with the pulley 35, a first driving gear 37 and a second driving gear that mesh with the intermediate gear 36. 38, and a first one-way clutch 39 and a second one-way clutch 40.

The first one-way clutch 39 receives the output of the first driving gear 37 and transmits the rotation only in the first rotation direction (the counterclockwise direction in the first embodiment) to the first drive shaft 27. The second one-way clutch 40 receives the output of the second driving gear 38 and transmits the rotation only in the second rotation direction (clockwise direction in the first embodiment) to the second drive shaft 32. The first one-way clutch 39 and the second one-way clutch 40 are known one-way clutches, respectively.

In such a pulley operation drive device 8, when the operation cord 25 is pulled in one direction and the pulley 35 and the intermediate gear 36 are rotated in the clockwise direction (second rotation direction) in FIG. 3, for example, The first driving gear 37 is rotated in the counterclockwise direction (first rotation direction) via the intermediate gear 36, and further, the first drive shaft 27 is rotated in the first rotation direction via the first one-way clutch 39. It can rotate in the direction (counterclockwise direction, see solid arrow in FIG. 5).

When the operation cord 25 is pulled in the opposite direction to rotate the pulley 35 and the intermediate gear 36 in the first rotation direction (counterclockwise direction), the second driving gear 38 is moved to the first rotation direction via the intermediate gear 36. It is possible to rotate in two rotation directions (clockwise direction) and further rotate the second drive shaft 32 in the second rotation direction (clockwise direction) via the second one-way clutch 40.

Clutch unit:
The first clutch unit 9 and the second clutch unit 10 respectively have a state in which the rotation of the pulley operation drive device 8 is transmitted to the first winding rotation shaft 13 and the second winding rotation shaft 14, and a state in which the rotation is not transmitted. , Switch.

Further, the first clutch unit 9 and the second clutch unit 10 are stopper units used in a conventional solar shading device (holding the shielding material in a rolled-up state or releasing the holding to lower the shielding material by its own weight). (See Patent Document 2). In this way, the configuration in which the clutch unit also has the function of the stopper unit as described above is also a feature of the present invention.

Since the directions of rotations transmitted from the pulley operation drive device 8 to the first and second drive shafts 27 and 32 are opposite to each other, the first clutch unit 9 and the second clutch unit 10 are the first cam drums described later. The direction of the cam groove 46 of 44 and the cam groove 46 of the second cam drum 45 are opposite to each other (axisymmetric) with respect to the rotation direction of the cam drum.

Further, as will be described later, the winding direction of the clutch spring 60 corresponds to the rotation direction of the second drive shaft 32 being opposite to the rotation direction of the first drive shaft 27. It is in the opposite direction to the clutch spring 60 of the unit 9.

As described above, the configurations and operations of the first clutch unit 9 and the second clutch unit 10 are the same, except for the configuration in which the cam grooves and the clutch springs are slightly different due to the opposite rotation directions. Therefore, the first clutch unit 9 will be described below.

As shown in FIGS. 4 and 5, the first clutch unit 9 includes a first transmission-side rotation portion 26 connected to the pulley operation drive device 8 and a first transmission-received portion connected to the first winding rotation shaft 13. The side rotating portion 50, the first cam drum 44 having a cam groove 46 having a substantially hemispherical cross section formed on the outer peripheral surface thereof, the clutch case 52 rotatably housing the first cam drum 44, and the inner surface of the clutch case 52 in the axial direction. And a holding groove 56 that is linear and has a substantially hemispherical cross-section, and is held in the holding groove 56 so as to be movable within a predetermined range in the axial direction and relative to the first cam drum 44 in the cam groove 46. And a clutch ball 55 that moves in a desired manner.

The first transmission-side rotation portion 26 includes a first drive shaft 27, a clutch spring cylinder 59 spline-coupled so as to rotate integrally with the first drive shaft 27 and be movable in the axial direction, and a clutch spring 60. , A transmission side meshing disc 61 fitted and fixed to the tip of the first drive shaft 27.

As described above, the first drive shaft 27 is connected to the first one-way clutch 39 of the pulley operation drive device 8, and is operated in the first rotation direction (counterclockwise direction) by pulling the operation cord 25 in one direction. It rotates and includes a spline portion 64 and an annular portion 65.

A coil-shaped clutch spring 60 is wound around the outer peripheral surface of the clutch spring cylinder 59. The clutch spring 60 normally tightens the outer peripheral surface of the clutch spring cylinder 59 by its elasticity, and rotates integrally with the rotation of the clutch spring cylinder 59.

However, when the rotation of the clutch spring 60 rotating together with the clutch spring cylinder 59 is restrained via one end 69 (see FIG. 5) of the clutch spring 60 and a force against the elastic force acts, the tightening force for the clutch spring cylinder 59 is increased. Weakens. Therefore, the clutch spring cylinder 59 is loosely tightened by the clutch spring 60, and rotates in a sliding manner relative to the clutch spring 60.

The clutch case 52 includes a clutch case main body 72 and a clutch case lid 73 attached to the clutch case main body 72. The cam cover 47 is attached to the base end portion 77 of the first cam drum 44, and the base end portion 77 is inserted into the inner peripheral wall surface 75 of the clutch case lid 73 so as to be rotatable.

As shown in FIGS. 7A to 7C, the clutch case lid 73 of the first cam drum 44 has a fixed rib 76 formed on a part of the inner peripheral wall surface 75 thereof. The fixed rib 76 may be designed to be provided on the inner surface of the clutch case main body 72 in consideration of the positional relationship with the movable rib described later.

The first drive shaft 27 is rotatably mounted in the first cam drum 44 through the center hole 48 of the cam cover 47 together with the clutch side sleeve 59 including the transmission side meshing disc 61 fixed to the tip thereof. An annular portion 65 provided on the base end side of the first drive shaft 27 is rotatably fitted in the opening 74 of the clutch case lid 73.

As shown in FIG. 5, the first cam drum 44 has a base end portion 77 cut out to form an engagement portion 78, and the engagement portion 78 is engaged with one end portion 69 of the clutch spring 60. is doing. As a result, the first cam drum 44 can rotate together with the clutch spring cylinder 59. Further, the first cam drum 44, along with the clutch spring cylinder 59, is movable in the axial direction relative to the first drive shaft 27.

Further, on the first cam drum 44, as shown in FIGS. 6A and 6B, a movable rib 80 is formed on a part of a peripheral edge portion 79 of the base end surface of the base end portion 77. As will be described in the operation to be described later, when the first cam drum 44 rotates and moves in the axial direction, the surface of the movable side rib 76 on the tip end side in the axial direction of the clutch case lid 73 is moved depending on the rotation angle and the moving position. Engages with or disengages from the surface of the fixed side rib 76 on the base end side in the axial direction.

As described above, the cam groove 46 is formed on the outer peripheral surface of the first cam drum 44, and the holding groove 56 (see FIGS. 4 and 10) for holding the clutch ball 55 is formed on the inner surface of the clutch case main body 72. , Is formed linearly in the axial direction. The clutch ball 55 is rotatably fitted in the cam groove 46 and the holding groove 56. For reference, the holding groove 56 is schematically shown in FIGS.

As shown in FIGS. 4 and 5, the first transmitted-side rotating unit 50 includes a first driven shaft 81 and a transmitted-side meshing plate 82 spline-coupled to the first driven shaft 81. There is.

The base end side of the first driven shaft 81 is rotatably mounted in the clutch case 52 and the first cam drum 44. The tip end side of the first driven shaft 81 is connected to the first hoisting and rotating shaft 13 by a connecting tool 83, and both can be rotated. The connector 83 has a fastening ring 86, a fastening plate 87, and a screw 88. A spline portion 91 (see FIGS. 4 and 5) is formed on the base end side of the first driven shaft 81.

The transmitted side meshing disc 82 is provided in the first cam drum 44 so as to be rotatable relative to the first cam drum 44 and axially movable together with the first cam drum 44 by the positioning ring 92. .. More specifically, the transmission-side meshing disc 82 is spline-coupled to the spline portion 91 of the first driven shaft 81, is rotatable with the first driven shaft 81, and is the first driven shaft 81. It is provided so as to be relatively movable in the axial direction.

8 and 9 are development views of the cam groove 46 formed on the outer peripheral surface of the first cam drum 44 of the first clutch unit 9. The clutch case 52 is fixedly provided to the head box 2, and a first cam drum that is axially movable in a holding groove 56 that is linearly formed in the inner surface of the clutch case 52 in the axial direction. It is schematically shown to show the relative position in the axial direction with respect to 44.

The transmitted side meshing disk 82 is configured to move in the axial direction together with the cam groove 46. However, for convenience of explanation of the operation, in FIG. 8 and FIG. 9, the transmitted side meshing disk 82 is the base end of the first cam drum 44. , And is shown schematically. Further, the transmission side meshing disc 61 that does not move in the axial direction is schematically shown facing the transmission side meshing disc 82.

Further, FIGS. 8 and 9 show the positional relationship of the clutch ball 55 with respect to the cam groove 46 and the movable side rib 80 formed at the base end portion 77 of the first cam drum 44 with respect to the fixed side rib 76 of the clutch case lid 73. The relative positional relationship is shown. 8 and 9, it is described as if the fixed rib 76 of the clutch case lid 73 moves and the movable rib 80 of the first cam drum 44 is immovable.

However, FIGS. 8 and 9 only show the relative positional relationship of the movable side rib 80 of the first cam drum 44 with respect to the fixed side rib 76 of the clutch case lid 73, and actually, the fixed side rib 76. Is formed on a part of the inner peripheral surface of the clutch case lid 73 and does not move, but the movable rib 80 moves in the axial direction and the circumferential direction. This point is the same also in FIG. 11, FIG. 14 to FIG.

The cam groove 46 includes, as a main groove, a winding groove 95 (see a path indicated by an alternate long and short dash line in FIGS. 8 and 9) which is continuously formed in an endless manner around the circumference. In the winding groove 95, the meshing portion 96 curved in a convex shape toward the tip side (the left side in FIGS. 8 and 9) and the direction opposite to the first rotation direction (winding direction) of the first cam drum 44 are formed. It has a stop portion 97 that is convexly curved and a holding portion 98 that is convexly curved in the first rotation direction of the first cam drum 44.

As will be described later, when the clutch ball 55 moves relative to the first cam drum 44 and is positioned relative to the meshing portion 96, the transmission operation of the first clutch unit 9 is performed. When the clutch ball 55 moves relative to the first cam drum 44 and is positioned at the stop portion 97, the first rotation direction (counterclockwise direction) of the first cam drum 44 of the first shielding member 3 is detected. The rotation in the winding direction) is restricted.

When the winding operation by the operation cord 25 is stopped halfway and released, the first cam drum 44 rotates in the second rotation direction (clockwise direction) based on the drop of the weight of the first shielding member 3, and the clutch ball 55 holds the holding portion 98. When the first shielding member 3 is located in the first shielding member 3, the first shielding member 3 is restrained from rotating in the second rotation direction (clockwise direction) based on the lowering of the first shielding member 3 due to its own weight. , Held from falling.

Further, the cam groove 46 has a release groove branched from the winding groove 95. As the release groove, the main release groove 102 branched from the winding groove 95 near the second rotation direction of the holding portion 98 and the sub release groove 103 branched from the winding groove 95 near the second rotation direction of the meshing portion 96. And have.

The main release groove 102 has an inclined portion 106 directed toward the base end side and a main release portion 107 at the end thereof. As will be described later, when the clutch ball 55 moves relative to the main releasing portion 107, the main releasing portion 107 causes the first clutch unit 9 to perform a transmission releasing operation (see FIG. 8A).

The sub-release groove 103 has an inclined portion directed to the base end side and a sub-release portion 111 that is an abutting end. When the clutch ball 55 moves relative to the first cam drum 44 and is positioned in the sub release portion 111, the first clutch unit 9 performs the transmission release operation.

The main release groove 102 and the main release portion 107, and the sub release groove 103 and the sub release portion 111 are different from each other in the location where they branch from the winding groove 95. The points of doing are the same as each other. The main and the sub are given to distinguish them from each other, and there is no special meaning with respect to the configuration and operation.

When the first cam drum 44 rotates with the rotation of the first drive shaft 27, the clutch ball 55 moves axially within the range of the axial length of the holding groove 56, and moves in the cam groove 46 within the first groove. It moves relative to the cam drum 44. The length L of the holding groove 56 in the axial direction is determined by the releasing portion (main releasing portion 107, sub-releasing portion 111) located on the proximal end side of the cam groove 46 and the meshing portion 96 located on the distal end side of the cam groove 46. Is formed to be smaller than the axial distance D (see FIG. 8A).

The main releasing portion 107 and the sub-releasing portion 111 of the cam groove 46 are portions of the cam groove 46 that are located at the most proximal end side in the axial direction, and the meshing portion 96 of the cam groove 46 is the cam groove 46. Since it is a portion located on the most distal end side in the axial direction, the axial length L of the holding groove 56 is located on the most proximal end side in the axial direction in the cam groove 46 formed in the first cam drum 44. That is, it is formed to be shorter than the length D of the axial distance between the portion that is located on the most tip side and the portion that is located on the tip side.

When the clutch ball 55 moves to one end and the other end of the holding groove 56, the clutch ball 55 is restrained there and cannot move any more. Therefore, the first cam drum 44 moves in the axial direction relative to the restrained clutch ball 55. As a result, the clutch ball 55 can be moved to and positioned in the engagement portion 96 and the main release portion 107.

As a result, the transmission-side meshing board 82 that moves in the axial direction together with the first cam drum 44 is meshed with the stationary transmission-side meshing disk 61, or the meshing is released. The details of this point will be described in more detail in the section of operation described later.

In FIG. 4, when the clutch ball 55 is located in the main releasing portion 107 of the cam groove 46 and the meshing of the transmission side meshing disc 61 and the transmission side meshing disc 82 is in the released state, the cam groove of the first cam drum 4 is released. 46 shows a positional relationship between the clutch ball 55 and the clutch ball 55 in a sectional view, and shows a state in which the movable side rib 80 of the base end portion 77 of the first cam drum 44 is not engaged with the fixed side rib 76 of the clutch case lid 73. ing.

Further, in FIG. 10A, when the clutch ball 55 is located at the stop portion 97 of the cam groove 46 and the transmission side meshing disc 61 and the transmission side meshing disc 82 are in the meshing state, The positional relationship between the cam groove 46 and the clutch ball 55 is shown in a sectional view, and in FIGS. 10A and 10B, the movable side rib 80 of the base end 77 of the first cam drum 44 corresponds to the clutch case lid 73. The state in which the fixed side ribs 76 are engaged is shown in a side view.

The clutch case 52 is fixed to the head box 2. Although not shown, the cam groove 46 may be provided on the inner peripheral surface of the clutch case 52 and the holding groove 56 may be provided on the outer peripheral surface of the first cam drum 44, contrary to the above-described configuration.

Action:
(1) Ascending (winding) operation The operation of the solar radiation shielding device 1 having the above configuration will be described below. Here, before the operation is started, the first cam unit 9 is in a released state, that is, as shown in FIG. 8A, the transmission side meshing board 61 of the first transmission side rotating portion 26 and the first transmitted side. The transmission side meshing discs 82 of the rotating part 50 are separated from each other and disengaged from each other.

In this state, as shown in FIGS. 4 and 8A, the movable side rib 80 of the base end portion 77 of the first cam drum 44 is not engaged with the fixed side rib 76 of the clutch case 52. From the state before the start of such an operation, the raising operation of raising the first shielding material 3 by the operation of pulling the operation cord 25 in one direction (the winding operation of winding the lifting cord) will be described.

When the operation cord 25 is pulled in one direction to operate and the pulley 35 is rotated in the clockwise direction, in FIG. 3, both the first driving gear 37 and the second driving gear 38 make a first rotation via the intermediate gear 36. It rotates in the direction (counterclockwise direction in FIG. 3 in the first embodiment).

The rotation of the first driving gear 37 in the first rotation direction (counterclockwise direction) is performed via the first one-way clutch 39 by the first drive shaft of the first transmission-side rotation portion 26 of the first clutch unit 9. 27, and the first drive shaft 27 rotates in the first rotation direction (counterclockwise direction in FIG. 5).

The rotation of the second driving gear 38 is generated by the second one-way clutch 40 (the clutch that transmits only when the second driving gear 38 rotates in the opposite direction to the first driving gear 37) in the second clutch unit 10. It is not transmitted to the second drive shaft 32 of the transmission side rotation unit 31.

When the first drive shaft 27 rotates in the first rotation direction (counterclockwise direction), the one end portion 69 of the clutch spring 60 wound around the clutch spring cylinder 59 and the engaging portion 78 of the first cam drum 44 are passed. Then, the first cam drum 44 is rotated in the first rotation direction (counterclockwise direction).

Then, as shown in FIG. 8A, the clutch ball 55 located at the base end of the holding groove 56 and located at the main release portion 107 of the main release groove 102 is opposed to the first cam drum 44. Specifically, the main release groove 102 passes through the inclined portion 106 and the branch portion 110, moves toward the winding groove 95, and moves inside the holding groove 56 toward the front end side (leftward in FIG. 8A). To do.

Since the clutch ball 55 can move only within the range of the holding groove 56 in the axial direction, the movement of the clutch ball 55 in the cam groove 46 is relative to the first cam drum 44.

When the clutch ball 55 reaches the tip of the holding groove 56 ((left end in FIG. 8B)), the movement of the clutch ball 55 to the tip side in the cam groove 46 is restrained, so that the first cam drum 44. Moves in the axial direction toward the base end side (rightward in FIG. 8A).

Then, the transmission side meshing disc 82 that moves in the axial direction together with the first cam drum 44 also moves toward the base end side, and meshes with the transmission side meshing disc 61, as shown in FIG. 8B, and the first clutch unit. 9 is in the transmission state.

As a result, the rotation of the first drive shaft 27 in the first rotation direction (counterclockwise direction) is transmitted to the first driven shaft 81 via the transmission side meshing disc 61 and the transmission side meshing disc 82. The raising operation of the first shielding member 3 by the first hoisting rotation shaft 13 starts. In the state shown in FIG. 8B, the movable rib 80 of the base end portion 77 of the first cam drum 44 is not engaged with the fixed rib 76 of the clutch case 52.

Further, when the operation cord 25 is continuously operated in the same direction, the first cam drum 44 continues to rotate in the first rotation direction (counterclockwise direction), and the clutch ball 55 moves as shown in FIG. 9A. Reach stop 97. Then, since the clutch ball 55 is restrained by the stop portion 97, the rotation of the first cam drum 44 is restrained and stopped.

In this state, when the operation cord 25 is continuously operated in the same direction to rotate the first drive shaft 27 and the clutch spring cylinder 59 in the first rotation direction (counterclockwise direction), the one end portion 69 of the clutch spring 60 is moved. Since it is locked to the engaging portion 78 of the first cam drum 44, the rotation of the clutch spring 60 together with the first cam drum 44 is stopped, and the tightening of the clutch spring cylinder 59 by the clutch spring 60 is loosened.

Therefore, when the operation code 25 is operated to continue the rotation of the first drive shaft 27, the clutch spring cylinder 59 continues to rotate while sliding with respect to the clutch spring 60, and the first driven shaft 81 also continues to rotate. The rotation of the one-winding rotary shaft 13 continues, and the raising operation of the first shielding member 3 continues.

By the way, the clutch ball 55 engages with the stop portion 97 of the cam groove 46 to stop the rotation of the first cam drum 44. However, at the time of the winding, the first winding rotation shaft 13, the first driven shaft An external force (reaction force) applied to the first cam drum 44 through the transmission-side meshing disc 82, the transmission-side meshing disc 82, the transmission-side meshing disc 61, and the like causes the first cam drum 44 to move axially to the left to engage the transmission-side meshing. The meshing between the board 61 and the transmission side meshing board 82 may be released.

However, in the present invention, in the state where the clutch ball 55 is restrained by the stop portion 97 and the rotation of the first cam drum 44 is restrained and stopped, as shown in FIGS. 9(a), 10(a) and 10(b). In addition, the movable side rib 80 of the base end portion 77 of the first cam drum 44 engages with the fixed side rib 76 of the clutch case 52.

Therefore, the first cam drum 44 is restricted from moving to the left in the axial direction in FIGS. 9A, 10</b>A, and 10</b>B, and is transmitted to the transmission side meshing disc 61 on the transmitted side. Since the meshing disk 82 is restricted from moving to the left, the first cam drum 44 moves axially to the left during the above-mentioned winding, and the transmission-side meshing disk 61 and the transmission-side meshing disk 82 are separated from each other. It is possible to prevent disengagement.

When the operation is stopped by pulling the operation cord 25 in one direction after the first shielding material 3 is wound up to a desired height, the first hoisting rotation shaft 13 is wound by the self-weight of the first shielding material 3. In the first embodiment, the first driven shaft 81, the power receiving side meshing plate 82, the power transmitting side meshing plate 61, and the first side are rotated in the direction opposite to the taking direction, that is, in the second direction (clockwise direction). The first cam drum 44 rotates in the second direction (clockwise direction) via the drive shaft 27, the clutch spring cylinder 59, and the clutch spring 60.

By this rotation, the clutch ball 55 enters the holding portion 98 in the cam groove 46 as shown in FIG. 9B, and the second rotation direction of the first cam drum 44 due to the weight drop of the first shielding member 3 ( The rotation in the clockwise direction) stops. Thereby, the 1st shielding material 3 can be hold|maintained in the open state to desired height.

In the state where the clutch ball 55 is restrained by the holding portion 98 and the rotation of the first cam drum 44 is restrained and held, similar to the state where the clutch ball 55 is restrained by the stop portion 97 as shown in FIG. 9A. As shown in FIG. 9B, the movable side rib 80 of the base end portion 77 of the first cam drum 44 engages with the fixed side rib 76 of the clutch case 52.

Therefore, in FIG. 9B, the first cam drum 44 is restricted from moving leftward in the axial direction, and the transmitted side meshing disc 82 moves leftward with respect to the transmission side meshing disc 61. Therefore, in the holding state, the first cam drum 44 may move axially leftward due to an earthquake or the like, and the meshing between the transmission side meshing disc 61 and the transmission side meshing disc 82 may be released. Can be prevented.

(2) Descent (roll down) operation
When lowering the first shielding member 3 in the state where it is held in the raised position as described above (see FIG. 9(b)), if the operation cord 25 is slightly pulled in the same one direction as when raising, the first clutch In the unit 9, the clutch ball 55 moves relative to the first cam drum 44 from the holding portion 98 shown in FIG. 9B to the winding groove 95 and to the branch portion 110 or a position beyond the branch portion 110. To do.

Then, when pulling the operation cord 25 in one direction is stopped, the first hoisting rotation shaft 13 is in the opposite direction to the hoisting direction due to the weight of the first shielding member 3, that is, the second rotation in the first embodiment. Direction (clockwise direction), through the first driven shaft 81, the transmitted side meshing disc 82, the transmission side meshing disc 61, the first drive shaft 27, the clutch spring cylinder 59, and the clutch spring 60. The 1-cam drum 44 is rotated in the second rotation direction (clockwise direction).

Then, the clutch ball 55 enters the main release groove 102 from the branch portion 110 and tries to move relatively from the inclined portion 106 to the main release portion 107 with respect to the first cam drum 44. Since the axial movement is restricted at the end, the first cam drum 44 moves toward the tip side.

Therefore, as shown in FIG. 8A, the transmission side meshing disc 82 and the transmission side meshing disc 61 are separated from each other, and the meshing therebetween is released. As a result, the power transmission side meshing disc 82, the first driven shaft 81, and the first hoisting rotation shaft 13 can freely rotate, and the first shielding member 3 is lowered by its own weight to be in a closed state.

At this time, since the meshing of the transmission side meshing plate 82 and the transmission side meshing plate 61 is released, the second rotation direction (clockwise rotation of the first driven shaft 81 due to the weight drop of the first shielding member 3). Rotation is not transmitted to the first drive shaft 27, the clutch spring cylinder 59, and the first cam drum 44.

In the raising operation, as described above, the meshing of the transmission side meshing board 61 of the first transmission side rotating section 26 and the transmission side meshing board 82 of the first transmitted side rotating section 50 is released (see FIG. 8 ( 8), the operation cord 25 is pulled in one direction to bring it into a meshed state as shown in FIG. 8B, and the first shielding member 3 is raised.

If the operation of the operation cord 25 is immediately stopped after the meshed state is achieved in this way, the first cam drum 44 rotates in the first rotation direction (counterclockwise direction), and although not shown, the clutch ball 55 After passing through the meshing portion 96, it enters the sub release groove 103 via the branch portion 104 to the sub release groove 103, and stops at the sub release portion 111.

As a result, as in the case where the clutch ball 55 enters the main release portion 107, as shown in FIG. 8A, the transmission side meshing disc 61 and the first transmission side rotation portion 61 of the first transmission side rotation portion 26. The meshing of the transmission side meshing board 82 of the portion 50 is released.

Second clutch unit:
Although the configuration and operation of the first clutch unit 9 have been described above, the configuration and operation of the second clutch unit 10 (see FIG. 2) are substantially the same as those of the first clutch unit 9. As with the first clutch unit 9, the second clutch unit 10 also includes the movable side rib 80 of the base end 77 of the second clutch unit 10 and the clutch case, as shown in FIGS. 11A and 11B. The fixed side rib 76 of 52 is provided so as to be disengageable.

However, the rotation direction of the second drive shaft 32 (see FIG. 4) and the second driven shaft 84 of the second clutch unit 10 is the second rotation direction (clockwise direction), and the rotation of the first drive shaft 27 is the same. The opposite of the direction.

The action of the second clutch unit 10 is that the second cam drum 45 meshes and meshes the transmission side meshing plate 61 of the second transmission side rotating part 31 and the transmission side meshing plate 82 of the second transmitted side rotating part 51. The switching operation for canceling the alignment is the same as that for the first clutch unit 9 except that the rotation directions when raising (winding) and lowering the own weight are opposite as described above.

That is, when raising (rolling up) the second shielding member 4, the operation cord 25 is pulled in the direction opposite to that when raising the first shielding member 3 (the other direction), and the pulley 35 is moved to the first position. 3 in the rotation direction (counterclockwise direction), in FIG. 3, the first driving gear 37 and the second driving gear 38 both rotate in the second rotation direction (clockwise direction) via the intermediate gear 36. To do.

The rotation of the second driving gear 38 in the second rotation direction is transmitted to the second drive shaft 32 of the second transmission side rotation portion of the second clutch unit 10 via the second one-way clutch 40, and the second The drive shaft 32 rotates in the second rotation direction (clockwise direction). The rotation of the first driving gear 37 is not transmitted to the first drive shaft 27 of the first transmission side rotation portion 26 of the first clutch unit 9 by the first one-way clutch 39.

Corresponding to the fact that the rotation direction of the second drive shaft 32 is opposite to the rotation direction of the first drive shaft 27, although not shown, the winding direction of the clutch spring is the clutch direction of the first clutch unit 9. It is in the opposite direction to the spring 60.

Further, the cam groove 46 of the second cam drum 45 of the second clutch unit 10 is different from the cam groove 46 of the first cam drum 44 of the first clutch unit 9 as shown in FIGS.
It is formed so as to be in the opposite direction (axisymmetric) with respect to the rotation direction.

In the second clutch unit 10, as shown in FIG. 11A, the clutch ball 55 is located in the main releasing portion 107 of the main releasing groove 102, and the meshing of the transmission side meshing disc 61 and the transmission side meshing disc 82 is released. The second clutch unit 10 is in the non-transmission state.

In this state, in the second clutch unit 10, as shown in FIG. 11A, when the clutch is in the released state, the movable side rib 80 of the base end portion 77 of the second clutch unit 10 and the fixed side rib of the clutch case 52. 76 is in a disengaged state.

In the second clutch unit 10, as shown in FIG. 11B, the clutch ball 55 is located at the meshing portion 96, and the transmission side meshing plate 61 and the transmission side meshing plate 82 mesh with each other. Indicates that it is in a transmission state.

Then, as shown in FIG. 11B, when the clutch ball 55 enters the stop portion 97 and is locked therein, the rotation of the second cam drum 45 is stopped, and as in the case of the first clutch unit 9. , The second drive shaft 32, the clutch spring cylinder 59, and the transmission side meshing plate 61 are rotated relative to the second cam drum 45, and the second shielding member is inserted via the transmission side meshing plate 82 and the second driven shaft 84. It is possible to wind up 4.

In the state of FIG. 11B, the movable side rib 80 of the base end 77 of the second cam drum 45 engages with the fixed side rib 76 of the clutch case 52, as in the case of the first clutch unit 9. Therefore, the second cam drum 45 is restricted from moving leftward in the axial direction, and the transmitted side meshing board 82 is restricted from moving leftward with respect to the transmitting side meshing board 61.

As a result, the second cam drum 45 moves leftward in the axial direction by the reaction force applied to the second cam drum 45 at the time of the winding, and the meshing of the transmission side meshing disc 61 and the transmission side meshing disc 82 is released. This can be prevented.

Although not shown, when the clutch ball 55 enters the holding portion 98 and is locked there, the rotation of the second cam drum 45 is stopped and the second shielding member 4 is opened as in the case of the first clutch unit 9. It is possible to hold it in a closed state.

At this time, the movable rib 80 of the second cam drum 45 engages with the fixed rib 76 of the clutch case 52. Therefore, the second cam drum 45 and the transmitted side meshing plate 82 are restricted from moving to the left in the axial direction, so that the meshing of the transmitting side meshing plate 61 and the transmitted side meshing plate 82 is released. Can be prevented. Therefore, it is possible to stably hold the second shielding material 4 in the open state.

(Example 2)
A second embodiment of the solar shading device according to the present invention will be described with reference to FIGS. The solar shading device 120 of the second embodiment is substantially the same as the solar shading device 1 of the first embodiment. Therefore, in the description of the solar radiation shading device 120 of the second embodiment, the same reference numerals are used for the same components as those of the solar radiation shading device 1 of the first embodiment.

Overview:
The outline of the configuration of the solar radiation shielding device 120 according to the second embodiment will be described while focusing on the configuration different from that of the solar radiation shielding device 1 according to the first embodiment. The overall structure of the solar radiation shielding device 120 of the second embodiment and the pulley operation drive device 8 are the same as those of the solar radiation shielding device 1 of the first embodiment shown in FIGS.

The solar radiation shading device 120 of the second embodiment is different from the solar radiation shading device 1 of the first embodiment in the configuration of a part of the clutch unit (the first clutch unit 9 and the second clutch unit 10).

Specifically, the first clutch unit 9 of the clutch unit of the second embodiment includes the first transmission-side rotating portion 26 and the first transmitted-side rotation portion 50, similarly to the first clutch unit 9 of the first embodiment. However, the first transmitting-side rotating portion 26 and the first transmitted-side rotating portion 50 are partially different in configuration. Similarly, the second clutch unit 10 of the second embodiment is also partially different in configuration from the first clutch unit 10 and the second clutch unit 10.

As shown in FIG. 12, the first transmission-side rotating portion 26 of the second embodiment includes a first drive shaft 27, the first drive shaft 27, and a spline as in the case of the first transmission-side rotating portion 26 of the first embodiment. A clutch spring cylinder 59, a clutch spring 60, and a transmission side meshing plate 61 that are connected to each other are provided.

In the first transmission-side rotating portion 26 of the first embodiment, the transmission-side meshing disc 61 is fixed to the tip of the first drive shaft 27 and does not move in the axial direction. However, the transmission side meshing disc 61 of the first transmission side rotating portion 26 of the second embodiment is fixed to the tip of the clutch spring cylinder 59 and rotates together with the first drive shaft 27 together with the clutch spring cylinder 59. , Can be moved relative to the first drive shaft 27 in the axial direction.

Further, the clutch spring cylinder 59 and the transmission side meshing disc 61 of the first transmission side rotating portion 26 of the second embodiment can rotate together with the first cam drum 44 via the clutch spring 60, and when the clutch spring 60 loosens, the first It can also rotate relatively (independently) to the cam drum 44.

In addition, the first transmitted-side rotating portion 50 of the second embodiment includes a first driven shaft 81 and a transmitted-side meshing board 82, similarly to the first transmitted-side rotating portion 50 of the first embodiment.

In the first transmitted-side rotating portion 50 of the first embodiment, the transmitted-side meshing disc 82 is spline-coupled to the first driven shaft 81 and is movable in the axial direction together with the first cam drum 44. The transmission side meshing disc 82 is fixed to the base end of the first driven shaft 81 and does not move in the axial direction.

The outline of the configuration in which the clutch unit (first and second clutch units 9 and 10) of the second embodiment is different from the clutch unit (first and second clutch units 9 and 10) of the first embodiment has been described above. As I explained, the basic differences between the two are summarized as follows.

In the first embodiment, regarding the first clutch unit 9, the transmission side meshing disc 61 of the first transmission side rotation part 26 does not move in the axial direction, but the transmission meshing disc 82 of the first transmission side rotation part 50 does not. By moving in the axial direction, the transmission side meshing disc 61 and the transmitted meshing disc 82 are engaged and released.

On the other hand, in the second embodiment, the transmitted mesh plate 82 of the first transmitted rotary unit 50 does not move in the axial direction, but the transmitted mesh plate 61 of the first transmitted rotary unit 26 moves in the axial direction. By doing so, the transmission side meshing disc 61 and the transmission meshing disc 82 are engaged and released.

Clutch unit:
As described above, the outline of the configuration of the solar radiation shielding device 120 according to the second embodiment has been described centering on the configuration of the clutch units (first and second clutch units 9 and 10) different from the solar radiation shielding device 1 according to the first embodiment. Further, the configuration of the clutch unit (first and second clutch units 9, 10) of the second embodiment will be described in detail with reference to FIGS. 12 to 17.

Also in the solar shading device 120 of the second embodiment, the first clutch unit 9 and the second clutch unit 10 rotate the rotation of the pulley operation drive device 8 to the first winding rotation shaft 13 and the second winding rotation shaft 14, respectively. It has a function of a stopper unit (see Patent Document 2 etc.) used in a conventional solar shading device while switching between a transmitting state and a non-transmitting state.

Also in the solar shading device 120 according to the second embodiment, the first clutch unit 9 and the second clutch unit 10 are rotated in the opposite directions to each other by the pulley operation drive device 8, and thus, as shown in FIG. As shown in FIGS. 15 and 17, the configuration and operation are different, except that the cam grooves 46 of the first cam drum 44 and the cam grooves 46 of the second cam drum 45 are opposite in direction of rotation (axisymmetric) to each other. Are the same as each other. Hereinafter, the structure of the first clutch unit 9 will be described.

The first clutch unit 9 of the second embodiment is similar to the first clutch unit 9 of the first embodiment, and as shown in FIGS. 12 and 13, the first transmission side rotation portion 26 connected to the pulley operation drive device 8. Formed on the inner surface of the first transmission side rotating part 50 connected to the first winding rotation shaft 13, the first transmission side rotation part 50, the first cam drum 44, the clutch case 52, and the clutch case 52, and the clutch ball 55 in the axial direction. A holding groove 56 for movably holding within a predetermined range and a clutch ball 55 are provided.

The first transmission-side rotating portion 26 includes a first drive shaft 27, a clutch spring cylinder 59 spline-coupled to the first drive shaft 27, a clutch spring 60, and a transmission-side meshing fixed to the tip of the clutch spring cylinder 59. And a board 61.

The first drive shaft 27 is connected to the first one-way clutch 39 of the pulley operation drive device 8 and is rotated in a first rotation direction (counterclockwise direction) by an operation of pulling the operation cord 25 in one direction. The clutch spring cylinder 59 is spline-coupled to the first drive shaft 27, rotates with the first drive shaft 27, and is relatively movable in the axial direction along the first drive shaft 27.

A clutch spring 60 is wound around the outer peripheral surface of the clutch spring cylinder 59. The clutch spring 60 normally tightens the outer peripheral surface of the clutch spring cylinder 59 by its elasticity, and rotates integrally with the rotation of the clutch spring cylinder 59.

The first drive shaft 27 is rotatably mounted in the first cam drum 44 together with a clutch spring cylinder 59 having a transmission side meshing disc 61 at its tip. One end portion 69 of the clutch spring 60 is engaged with an engaging portion 78 (see FIGS. 12 and 13) formed by cutting out the base end portion 77 of the first cam drum 44.

The first cam drum 44 can rotate together with the clutch spring cylinder 59 via the one end portion 69 of the clutch spring 60, and can rotate relative to the clutch spring cylinder 59 when the clutch spring 60 is loosened. In addition, it is movable in the axial direction relative to the first drive shaft 27.

The clutch case 52 is fixed to the head box 2 and includes a clutch case main body 72 and a clutch case lid 73 attached to the clutch case main body 72. The cam cover 47 is attached to the base end portion 77 of the first cam drum 44, and the base end portion 77 is rotatable in the inner peripheral wall of the clutch case lid 73 together with the first drive shaft 27 and the clutch spring cylinder 59. It has been charged to become.

As shown in FIGS. 7A to 7C, the clutch case lid 73 of the first cam drum 44 has a fixed rib 76 formed on a part of its inner peripheral wall surface 75, as shown in FIGS. ing. The fixed rib 76 may be designed to be provided on the inner surface of the clutch case main body 72 in consideration of the positional relationship with the movable rib 80 described later.

Further, in the first cam drum 44, as shown in FIGS. Are formed. As will be described in the operation to be described later, when the first cam drum 44 rotates and moves in the axial direction, the surface of the movable side rib 80 on the tip side in the axial direction of the clutch case lid 73 is moved depending on the rotation angle and the moving position. Engages with or disengages from the surface of the fixed side rib 76 on the base end side in the axial direction.

An endless cam groove 46 is formed around the outer circumference of the first cam drum 44, and a clutch ball holding groove 56 is formed on the inner surface of the clutch case body 72. The clutch ball 55 is rotatably fitted in the cam groove 46 and the holding groove 56.

As shown in FIGS. 12 and 13, the first transmitted-side rotating portion 50 includes a first driven shaft 81 and a transmitted-side meshing plate 82 fixed to the base end of the first driven shaft 81. I have it. The base end side of the first driven shaft 81 including the transmission side meshing disc 82 is rotatably mounted in the clutch case 52 and the first cam drum 44. The tip end side of the first driven shaft 81 is connected to the first hoisting and rotating shaft 13 by a connecting tool 83, and rotates the first hoisting and rotating shaft 13 together.

As described above, the first clutch unit 9 of the second embodiment is partially different from the first clutch unit 9 of the first embodiment in the first transmission-side rotation portion 26 and the first transmission-side rotation portion 50. Based on such a difference, the configuration of the cam groove 46 of the first cam drum 44 of the first clutch unit 9 also differs. The configuration of the cam groove 46 in the first cam drum 44 of the first clutch unit 9 of the second embodiment will be described below.

14 and 15 are development views of the cam groove 46 formed on the outer peripheral surface of the first cam drum 44 of the first clutch unit 9. Further, the holding groove 56, which is provided stationary on the inner surface of the clutch case 52, is schematically shown to show the relative position in the axial direction with respect to the axially movable first cam drum 44.

The transmission side meshing disc 61 is configured to move in the axial direction together with the first cam drum 44. However, for convenience of explaining the operation, the transmission side meshing disc 61 is arranged on the tip side of the first cam drum 44 in FIGS. 14 and 15. It is added and shown schematically. Further, the transmission-side meshing disc 82, which is stationary without being moved in the axial direction, is schematically shown facing the transmission-side meshing disc 61.

Further, FIGS. 14 and 15 show the positional relationship of the clutch ball 55 with respect to the cam groove 46 and the movable side rib 80 formed at the base end portion 77 of the first cam drum 44 with respect to the fixed side rib 76 of the clutch case lid 73. The relative positional relationship is shown.

The cam groove 46 includes, as a main groove, a winding groove 95 which is continuously formed in an endless manner in the circumferential direction (see a chain line path in FIGS. 14 and 15). The winding groove 95 has a meshing portion 96 curved toward the base end side (right side in FIGS. 14 and 15) and a convex shape curved in a direction opposite to the first rotation direction (winding direction) of the first cam drum 44. And a holding portion 98 that is convexly curved in the first rotation direction of the first cam drum 44.

As will be described later, the meshing portion 96 performs the transmission operation of the first clutch unit 9 when the clutch ball 55 moves relative to the first cam drum 44 and is positioned there. As will be described later, when the clutch ball 55 moves relative to the stop portion 97, the stop portion 97 restrains the rotation of the first cam drum 44 in the first rotation direction (counterclockwise).

Further, as will be described later, when the holding portion 98 stops pulling in one direction of the operation cord 25 in the middle and releases it, the clutch ball 55 enters this holding portion 98, and the first shielding member 3 is lowered by its own weight. The rotation of the cam drum 44 in the second rotation direction (clockwise) is restricted, and the first shielding member 3 does not descend by its own weight.

Further, the cam groove 46 has a main release groove 102 branched from the winding groove 95 in the vicinity of the holding portion 98, and a sub release groove 103 in the vicinity of the meshing portion 96 from the winding groove 95 via the branch portion 104. The main release groove 102 has an inclined portion 106 directed toward the tip side and a main release portion 107 at the end of the inclined portion 106. As will be described later, when the clutch ball 55 moves relative to the main releasing portion 107, the main releasing portion 107 causes the first clutch unit 9 to perform a transmission releasing operation (see FIG. 14A).

The sub-release groove 103 has an inclined portion directed to the base end side and a sub-release portion 111 that is an abutting end. As will be described later, when the clutch ball 55 moves relative to the sub release portion 111, the first clutch unit 9 performs the transmission release operation.

When the first cam drum 44 rotates as the first drive shaft 27 rotates, the clutch ball 55 moves axially within the holding groove 56 within the axial length L of the holding groove, and the cam groove 46. The inside moves relative to the first cam drum 44. The axial length L of the holding groove 56 is in the axial direction with respect to the releasing portion (main releasing portion 107, sub-releasing portion 111) located on the tip end side of the meshing portion 96 located on the base end side of the cam groove 46. It is formed smaller than the distance D (see FIG. 14A).

When the clutch ball 55 moves to one end and the other end of the holding groove 56, the clutch ball 55 is restrained there and cannot move any more. Therefore, the first cam drum 44 moves in the axial direction relative to the restrained clutch ball 55. As a result, the clutch ball 55 can be moved to and positioned in the main release portion 107 and the meshing portion 96.

As a result, the transmission-side meshing disc 61 that moves in the axial direction together with the first cam drum 44 meshes with the stationary transmission-side meshing disc 82, or the meshing is released. The details of this point will be described in more detail in the section of operation described later.

In FIG. 14A, the first cam drum 44 when the clutch ball 55 is located in the main release portion 107 of the cam groove 46 and the meshing of the transmission side meshing disc 61 and the transmission side meshing disc 82 is in the released state. The cross-sectional view of the positional relationship between the cam groove 46 and the clutch ball 55 shows that the movable rib 80 of the base end 77 of the first cam drum 44 is not engaged with the fixed rib 76 of the clutch case 52. Shown in side view.

15(a), 16(a) and 16(b), the clutch ball 55 is located at the stop portion 97 of the cam groove 46, and the transmission side meshing disc 61 and the transmission side meshing disc 82 are in the meshed state. The positional relationship between the cam groove 46 of the first cam drum 44 and the clutch ball 55 is shown in a sectional view, and the movable side rib 80 of the base end portion 77 of the first cam drum 44 is the fixed side rib of the clutch case 52. The state which is engaging with 76 is shown by a side view.

Action:
The operation of the solar radiation shielding device 120 of the second embodiment having the above configuration is substantially the same as that of the solar radiation shielding device 1 of the first embodiment, but as described above, in the cam unit (first and second cam units 9, 10). Since they are partially different, the operation based on the different configuration will be mainly described below.

(1) Ascending (winding) operation Here, before the operation is started, the first clutch unit 9 is in the released state, that is, as shown in FIG. 14A, the transmission side meshing of the first transmission side rotating portion 26. The disc 61 and the transmission-side meshing disc 82 of the first transmission-side rotating part 50 are separated from each other and disengaged from each other.

In this state, as shown in FIGS. 12 and 14A, the movable side rib 80 of the base end portion 77 of the first cam drum 44 is not engaged with the fixed side rib 76 of the clutch case 52. An operation of pulling the operation cord 25 in one direction to raise the first shielding member 3 from such a state before the start of the movement (a winding operation of winding the lifting cord) will be described.

When the operation cord 25 is pulled and operated in one direction to rotate the pulley 35 in the second rotation direction (clockwise direction), in FIG. 3, the first driving gear 37 and the second driving gear are moved via the intermediate gear 36. Both 38 rotate in the first rotation direction (counterclockwise direction).

This rotation is transmitted via the first one-way clutch 39 to the first drive shaft 27 of the first transmission-side rotating portion 26 of the first clutch unit 9, and the first drive shaft 27 moves in the first rotation direction (main In the second embodiment, it rotates counterclockwise).

When the first drive shaft 27 rotates in the first rotation direction (counterclockwise direction), the first cam drum 44 is moved to the first cam drum 44 via the one end portion 69 of the clutch spring 60 wound around the clutch spring cylinder 59. Rotate in the direction of rotation (counterclockwise).

Then, as shown in FIG. 14A, the clutch ball 55 stopped at the main releasing portion 107 of the main releasing groove 102 is relatively released from the main releasing portion of the main releasing groove 102 with respect to the first cam drum 44. It passes through the inclined portion 106 from 107, moves from the branched portion 110 toward the winding groove 95, and moves inside the holding groove 56 toward the base end side (rightward in FIG. 14A).

When the clutch ball 55 reaches the base end ((the right end in FIG. 14A)) of the holding groove 56, the further movement in the axial direction is restrained, so that the first cam drum 44 moves in the axial end. Move to the side.

Then, the transmission side meshing board 61 provided on the clutch spring cylinder 59 that moves in the axial direction together with the first cam drum 44 also moves to the tip side in the axial direction, and as shown in FIG. The first clutch unit 9 is brought into a transmission state by engaging with the board 82.

As a result, the rotation of the first drive shaft 27 in the first rotation direction (counterclockwise direction) is transmitted to the first driven shaft 81 via the transmission side meshing disc 61 and the transmission side meshing disc 82. The raising (winding) operation of the first shielding member 3 by the first winding rotation shaft 13 starts. In the state shown in FIG. 14B, the movable side rib 80 of the base end portion 77 of the first cam drum 44 is not engaged with the fixed side rib 76 of the clutch case 52.

Further, when the operation code 25 is continuously operated, the first cam drum 44 continues to rotate in the first rotation direction (counterclockwise direction), and the clutch ball 55 moves to the stop portion 97 as shown in FIG. 15A. Reach Then, since the clutch ball 55 is restrained by the stop portion 97, the rotation of the first cam drum 44 is restrained and stopped.

In this state, when the operation cord 25 is continuously operated to rotate the first drive shaft 27 and the clutch spring cylinder 59 in the first rotation direction (counterclockwise direction), the one end portion 69 of the clutch spring 60 causes the first cam drum to move. Since the clutch spring 60 is locked to the engaging portion 78 of the clutch 44, the rotation of the clutch spring 60 together with the first cam drum 44 is stopped, and the tightening of the clutch spring cylinder 59 by the clutch spring 60 is loosened.

Therefore, when the operation code 25 is operated and the rotation of the first drive shaft 27 is continued, the rotation of the first cam drum 44 is stopped, but the clutch spring cylinder 59 continues to rotate while sliding with respect to the clutch spring 60. The first driven shaft 81 also continues to rotate.

By the way, the clutch ball 55 engages with the stop portion 97 of the cam groove 46 to stop the rotation of the first cam drum 44. However, at the time of the winding, the first winding rotation shaft 13, the first driven shaft The external force (reaction force) applied to the first cam drum 44 through the transmission-side meshing disc 82, the transmission-side meshing disc 82, the transmission-side meshing disc 61, and the like causes the first cam drum 44 to move to the right in the axial direction, and thus the transmission-side meshing The mesh between the disk 61 and the transmission side meshing disk 82 may be disengaged.

However, in the present invention, when the clutch ball 55 is restrained by the stop portion 97 and the rotation of the first cam drum 44 is restrained and stopped, as shown in FIGS. 15(a), 16(a), and (b). In addition, the movable side rib 80 of the base end portion 77 of the first cam drum 44 engages with the fixed side rib 76 of the clutch case 52.

Therefore, the first cam drum 44 is restricted from moving to the right in the axial direction in FIGS. 15A, 16A, and 16B, and is transmitted to the transmission side meshing plate 61 on the transmitted side. Since the meshing plate 82 is restricted from moving to the right, the reaction force applied to the first cam drum 44 causes the first cam drum 44 to move to the right in the axial direction during the winding operation, and the transmission side meshing is performed. It is possible to prevent the meshing between the board 61 and the transmission side meshing board 82 from being released.

When the operation is stopped by stopping the pulling of the operation cord 25 in one direction after raising (rolling up) the first shielding member 3 to a desired height, the first hoisting rotation shaft is caused by the weight of the first shielding member 3. 13 rotates in a direction opposite to the winding direction, that is, in the second embodiment in the second rotation direction (clockwise direction), and further, the first driven shaft 81, the transmitted side meshing plate 82, the transmission side. The first cam drum 44 rotates in the second rotation direction (clockwise direction) via the meshing plate 61, the clutch spring cylinder 59, and the clutch spring 60.

By this rotation, the clutch ball 55 enters the holding portion 98, as shown in FIG. 15B, and the second rotation direction (clockwise direction) of the first cam drum 44 due to the weight drop of the first shielding member 3. Rotation to) stops. Thereby, the 1st shielding material 3 can be hold|maintained in the open state to desired height.

In the state where the clutch ball 55 is restrained by the holding portion 98 and the rotation of the first cam drum 44 is restrained and held, as in the state of being restrained by the stop portion 97 shown in FIG. As shown in (b), the movable side rib 80 of the base end portion 77 of the first cam drum 44 engages with the fixed side rib 76 of the clutch case 52.

Therefore, the first cam drum 44 is restricted from moving to the right in the axial direction, and the transmitted side meshing board 82 is restricted from moving to the right side with respect to the transmitting side meshing board 61. In this state, it is possible to prevent the first cam drum 44 from moving to the right in the axial direction due to an earthquake or the like, and the meshing between the transmission side meshing disc 61 and the transmission side meshing disc 82 is released.

(2) Descent (roll down) operation
When lowering the first shielding member 3 in the rolled-up state, if the operation cord 25 is pulled slightly in the same one direction as when raising, the clutch balls 55 in the first clutch unit 9 are shown in FIG. 15(b). From the holding portion 98, it advances along the winding groove 95, and moves relative to the first cam drum 44 to a position where the main release groove 102 branches or a position beyond the branch 110.

When the operation cord 25 is stopped from being pulled in one direction and the operation is stopped, the first hoisting rotation shaft 13 rotates in the second rotation direction (clockwise direction) due to the weight of the first shielding material 3. , The first driven shaft 81, the transmitted side meshing disc 82, the transmission side meshing disc 61, the clutch spring cylinder 59 and the clutch spring 60, the first cam drum 44 in the second rotation direction (clockwise direction). Rotate.

Then, the clutch ball 55 enters the main release groove 102 from the branch portion 110 and tries to move from the inclined portions 106 to 107 relative to the first cam drum 44, but at the tip of the holding groove 56 in the axial direction. Is restrained, the first cam drum 44 moves toward the base end side.

As a result, as shown in FIG. 14A, the transmission side meshing disc 61 and the transmission side meshing disc 82 separate from each other and the meshing is released. Then, the transmitted side meshing disc 82, the first driven shaft 81, and the first hoisting rotation shaft 13 can freely rotate, and the first shielding member 3 descends by its own weight to be in a closed state.

Since the meshing of the transmission side meshing disk 61 and the transmission side meshing disk 82 is released, the first driven shaft 81 rotates in the second rotation direction (clockwise direction) due to the weight drop of the first shielding member 3. Is not transmitted to the first drive shaft 27, the clutch spring cylinder 59, and the first cam drum 44.

In the ascending (winding operation), as described above, the meshing between the transmission side meshing board 61 of the first transmission side rotating section 26 and the transmission side meshing board 82 of the first transmitted side rotating section 50 is released ( 14(a)), the operation cord 25 is pulled in one direction to bring it into a meshed state as shown in FIG. 14(b), and the first shielding material 3 is rolled up.

If the operation of the operation cord 25 is immediately stopped after the meshed state is established in this way, the first cam drum 44 rotates in the first rotation direction (counterclockwise direction), and although not shown, the clutch ball 55 After passing through the meshing portion 96, it enters the sub release groove 103 through the branch portion 104 and stops at the sub release portion 111.

As a result, similarly to the case where the clutch ball 55 enters the main release groove 102 (see FIG. 14A), the transmission side meshing board 61 of the first transmission side rotation section 26 and the first transmission side rotation section 50. The meshing of the transmission side meshing board 82 is released.

Second clutch unit:
Although the configuration and operation of the first clutch unit 9 of the second embodiment have been described above, the configuration and operation of the second clutch unit 10 are substantially the same as those of the first clutch unit 9. As for the second clutch unit 10, as shown in FIGS. 12, 17A, and 17B, the movable side rib 80 of the base end 77 of the second clutch unit 10 and the fixed side rib 76 of the clutch case 52. Is detachable.

However, the rotation direction of the second drive shaft 32 and the second driven shaft 84 of the second clutch unit 10 is the second rotation direction (clockwise direction), which is opposite to the rotation direction of the first drive shaft 27. is there.

The switching operation by which the second cam drum 45 of the second clutch unit 10 releases the meshing between the transmission side meshing board 61 of the second transmission side rotating part 31 and the transmission side meshing board 82 of the second transmitted side rotating part 51 is It is the same as the case of the first clutch unit 9 except that the rotation directions when raising (winding up) and lowering its own weight are opposite as described above.

That is, when raising (rolling up) the second shielding member 4, contrary to when winding up the first shielding member 3, the operation code is pulled in the other direction to operate, and the pulley 35 is rotated in the first rotation direction. When rotated in the (counterclockwise direction), in FIG. 3, the first driving gear 37 and the second driving gear 38 both rotate in the second rotation direction (clockwise direction) via the intermediate gear 36.

The rotation of the second driving gear 38 in the second rotation direction (clockwise direction) is performed via the second one-way clutch 40 by the second drive shaft 32 of the second transmission-side rotating portion 31 of the second clutch unit 10. And the second drive shaft 32 rotates in the second rotation direction (clockwise direction). The rotation of the first driving gear 37 is not transmitted to the first drive shaft 27 of the first transmission side rotation portion 26 of the first clutch unit 9 by the first one-way clutch 39.

As described above, in response to the rotation direction of the second drive shaft 32 being opposite to the rotation direction of the first drive shaft 27, the cam groove 46 of the second cam drum 45 of the second clutch unit 10 is provided with the first clutch. As shown in FIGS. 17A and 17B, the cam groove 46 of the first cam drum 44 of the unit 9 is formed in a direction (line symmetry) opposite to the rotation direction.

In the second clutch unit 10, FIG. 17A shows that the clutch ball 55 is located at the main release portion 107 at the end of the main release groove 102, and the transmission side meshing disc 61 and the transmission side meshing disc 82 mesh with each other. Indicates that the second clutch unit 10 is in the non-transmission state.

In this state, in the second clutch unit 10, as shown in FIG. 17A, the movable rib 80 of the base end portion 77 of the second clutch unit 10 and the fixed rib 76 of the clutch case 52 are engaged. There is no state.

In the second clutch unit 10, the clutch ball 55 is located at the meshing portion 96 in the state shown by the chain double-dashed line in FIG. 17B, and the transmission side meshing disc 61 and the transmission side meshing disc 82 mesh with each other. The second clutch unit 10 is in the transmission state.

Then, as shown in FIG. 17B, when the clutch ball 55 enters the stop portion 97 and is locked there, the rotation of the second cam drum 45 stops, and like the case of the first clutch unit 9, , The second drive shaft 32, the clutch spring cylinder 59, and the transmission side meshing plate 61 are relatively rotated with respect to the second cam drum 45, and the second transmission shaft meshing plate 82 and the second driven shaft 84 are used to rotate the second shaft. 2 The shielding material 4 can be rolled up.

In the state of FIG. 17B, the movable rib 80 of the base end 77 of the second cam drum 45 engages with the fixed rib 76 of the clutch case 52, as in the case of the first clutch unit 9. Therefore, the second cam drum 45 is restricted from moving to the right in the axial direction, and the transmission side meshing board 61 is restricted from moving to the right side with respect to the transmission side meshing board 82.

As a result, the second cam drum 45 moves rightward in the axial direction by the reaction force applied to the second cam drum 45 at the time of the winding, and the meshing of the transmission side meshing disc 61 and the transmission side meshing disc 82 is released. This can be prevented.

Although the embodiment for carrying out the solar radiation shielding device according to the present invention has been described above based on the embodiments, the present invention is not limited to such embodiments, and the techniques described in the scope of the claims. It goes without saying that there are various embodiments within the scope of the subject matter.

Since the solar shading device according to the present invention has the above-described configuration, not only the solar shading device including one shielding member suspended from the head box but also two solar shields suspended from the head box. The present invention can be applied to a twin-type solar shading device in which materials are switched by a single operation code in a loop shape and are independently moved up and down.

Further, the present invention can be applied as a solar shading device to a solar shading device such as a tuck-up curtain device (Roman shade or the like), a pleated screen device, a shutter device, or a blind device.

1 solar shading device
2 head box
3 First shielding material
4 Second shielding material
8 Pulley operation drive device
9 First clutch unit
10 Second clutch unit
13 First winding rotation axis
14 Second winding rotation axis
15 First winding roller
16 Second winding roller
21 lifting code
22 Bottom rail
25 Operation code
26 1st transmission side rotating part
27 First drive shaft
31 Second transmission side rotating part
32 Second drive shaft
35 pulley
36 intermediate gear
37 1st driving gear
38 Second drive gear
39 First one-way clutch
40 Second one-way clutch
44 First Cam Drum
45 Second Cam Drum
46 Cam groove
47 cam cover
48 Center hole of cam cover
50 First transmitted side rotating part
51 Second transmitted side rotating part
52 clutch case
55 Clutch Ball
56 retaining groove
59 Clutch spring cylinder
60 clutch spring
61 Transmission side meshing board
64 Spline part of the first drive shaft
65 annular part
68 Spline part of clutch spring cylinder
69 One end of clutch spring
72 Clutch case body
73 Clutch case lid
74 Clutch Case Lid Opening 75 Clutch Case Lid Inner Wall 76 Fixed Side Rib
77 Base end of cam drum
78 Engagement part of cam drum 79 Peripheral wall surface of base end part of cam drum 80 Movable rib
81 First driven shaft
82 Transmission side meshing board
83 connecting tool 84 second driven shaft
86 Fastening ring
87 Tightening plate
88 screws
91 Spline part of the first driven shaft
92 Positioning ring
95 winding groove
96 meshing part
97 Stop
98 holding part
102 Main release groove
103 Secondary release groove 104 Branch to secondary release groove
106 Main release groove slope
107 Main release section
110 Cam groove branch
111 Sub release unit
120 solar shading device

Claims (11)

A pulley operation drive device provided on the head box and rotated by an operation code,
A hoisting rotation shaft for raising the shielding material hanging downward from the head box,
A solar radiation shielding device, comprising: a clutch unit that selectively switches between a transmission state in which the rotational force of the pulley operation drive device is transmitted to the winding shaft and a non-transmission state in which the rotation force is not transmitted.
The clutch unit includes a transmission-side rotating portion that is connected to a pulley operation drive device and that has a meshing disc, a transmission-side rotating portion that has a meshing disc that is connected to a winding rotation shaft, and a cam drum that has a cam groove formed on its peripheral surface. A clutch case attached to the head box so as to rotatably accommodate the cam drum; a holding groove formed linearly in the axial direction on the inner surface of the clutch case; and one end and the other end of the holding groove in the holding groove in the axial direction. And a clutch ball that is movable only in the axial direction in the range between and that moves relative to the cam drum in the cam groove,
The cam drum is formed with a movable side rib that moves and rotates in the axial direction integrally with the cam drum, and a fixed side rib that is engageable with and disengageable from the movable side rib is formed on the inner surface of the clutch case.
The solar shading device is characterized in that the cam groove has an endless winding groove formed on the cam drum, and a release groove formed by branching from the winding groove. The winding groove has an engagement portion, a stop portion and a holding portion, and the release groove has a release portion,
The meshing portion is located on one of the base end side and the tip end side of the cam groove, and the release portion is provided on the other side of the base end side and the tip end side of the cam groove.
The axial length of the holding groove is shorter than the axial distance between the meshing portion and the release portion,
When the cam drum rotates in one rotation direction due to the rotation of the transmission side rotation part and the clutch ball comes to the meshing part, the meshing disc of one of the rotation parts of the transmission side rotation part and the transmission side rotation part becomes The other rotating part moves in a direction relatively closer to the meshing plate in the axial direction to be in a transmission state in which they mesh with each other, and due to the rotation of the transmission side rotating part due to the dead weight of the shielding material, the cam drum becomes Rotate in the other direction of rotation in the opposite direction,
When the clutch ball reaches the releasing portion, the one rotating portion moves in a direction in which the rotating portion is relatively separated from the other rotating portion in the axial direction, releasing the meshed state and releasing the non-transmitted state. The solar radiation shielding device according to claim 1, wherein the solar radiation shielding device has the following configuration. When the clutch ball is located at the stop, the rotation of the cam drum in one rotation direction is restrained to stop it. When the clutch ball is located at the holding part, the rotation of the cam drum in the other rotation direction is stopped and held. Next to
Regardless of whether the clutch ball is located at the stop part or the holding part, the mesh plate of the transmission side rotary part and the mesh plate of the transmission side rotary part are in mesh, and the movable side rib and the fixed side rib are engaged. The solar shading device according to claim 2, characterized in that, in such a state, the axial movement of the cam drum is regulated to maintain the meshed state. The clutch unit has a configuration that can be selected by operating the operation code into one of a state in which the shielding material can be raised, a state in which the shielding material can be lowered by its own weight, and a state in which the shielding material can be held without being lowered by its own weight. The solar shading device according to any one of claims 1 to 3, characterized in that: The transmission-side rotating portion has a drive shaft that rotates by the pulley operating drive device and a clutch spring cylinder that is spline-coupled to the drive shaft and around which a clutch spring is wound. One end of the clutch spring is engaged with the cam drum. The clutch spring cylinder moves in the axial direction together with the cam drum via the clutch spring, enables the cam drum to rotate, and when the rotation of the cam drum and the clutch spring is restricted, the clutch spring cylinder does not move with respect to the clutch spring. The solar shading device according to claim 1, wherein the solar shading device is rotatable while sliding. 6. The transmission-side rotating portion has a driven shaft that rotates together with the meshing disc of the transmission-side rotating portion, and the driven shaft is connected to the hoisting and rotating shaft. The solar shading device according to any one of the above. The stop portion is formed to be convexly curved in the other rotation direction in which the cam drum rotates, and the holding portion is formed to be convexly curved in the one rotation direction in which the cam drum rotates. The solar shading device according to claim 2, wherein the solar shading device is provided. The meshing disc of the one rotating portion is a meshing disc included in the transmitted side rotating portion, and the meshing disc can be moved in the axial direction relative to the driven shaft by spline coupling to the driven shaft. It is attached and rotatable relative to the cam drum, and is provided so as to be movable in the axial direction together with the cam drum.
7. The meshing disc of the other rotating portion is a meshing disc included in the transmission-side rotating portion, and the meshing disc is fixed to a tip of a drive shaft of the transmitting-side rotating portion. Solar shading device. The meshing disc of the one rotating portion is a meshing disc included in the transmitting side rotating portion, and the meshing disc is fixed to a tip of the clutch spring cylinder.
The insolation according to claim 6, wherein the meshing disc of the other rotating portion is a meshing disc included in the transmission-side rotating portion, and the meshing disc is fixed to the base end of the driven shaft. Shielding device. Two sets of a clutch unit and a winding rotary shaft are provided, and the operation code of the pulley operation drive device is a loop, and by operating the operation code in one direction, either one of the two sets 10. A twin type configuration in which a rotational force is transmitted to only one of the two pairs by transmitting the rotational force to only the other and operating the operation cord in the other direction. A solar shading device according to the item Crab . The pulley operation drive device is configured to rotate an intermediate gear that rotates by operating an operation code, a first driving gear and a second driving gear that mesh with the intermediate gear, and rotate one of the first driving gears in one rotation direction of the two sets. A first one-way clutch for transmitting a rotational force to only one of the two sets and a second one-direction for transmitting a rotational force of the second driving gear in the other rotational direction to only the other of the two sets. The solar radiation shielding device according to claim 10, wherein the solar radiation shielding device has a twin type structure including a clutch .

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