JP7076269B2 - Cloaking device - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention includes a pleated screen, a horizontal blind, a raised curtain, a curtain rail, etc. In particular, the present invention relates to a shielding device that converts the rotation of an input shaft that has been rotationally transmitted from an operation source that rotates in both directions into a one-way rotation and transmits the rotation to the drive shaft of the shielding material to be lifted and lowered.

The pleated screen suspends and supports a screen that can be bent in the vertical direction from a head box, and raises and lowers the screen by an operating device to appropriately adjust the amount of lighting.

Generally, in a pleated screen that suspends and supports one screen from the head box, this screen is used as drape fabric (light-shielding fabric) or lace fabric (light-collecting fabric), and the amount of lighting is adjusted by folding the screen. Can be done.

In addition, as a type of pleated screen, a screen that can be folded in a zigzag shape in the vertical direction is composed of an upper screen and a lower screen of different fabrics, and the lower edge of the upper screen and the upper edge of the lower screen are taken as an intermediate rail. Some of them are worn and the middle rail and bottom rail are suspended and supported by independent lifting cords.

In such a pleated screen having an upper screen and a lower screen, the upper screen is used as a daylighting material and the lower screen is used as a daylighting material, or conversely, the upper screen is used as a daylighting material and the lower screen is used as a daylighting material. Various combinations of fabrics can be separated by an intermediate rail. The amount of lighting can be adjusted by folding either or both of the upper screen and the lower screen, increasing the degree of freedom in adjusting the amount of lighting. Further, the number of intermediate rails is not limited to one, and a plurality of intermediate rails can be used as a combination of three or more screens.

By the way, in the cloaking device, an endless operation cord is hung on an operation pulley rotatably supported at one end of the head box, and the operation cord is operated to rotate the operation pulley to shield the cloaking device. There is something that raises and lowers the material. However, when such an endless operation cord is hung from the operation pulley, the endless edge of the operation cord may be caught by a resident or other moving object moving in the room.

Therefore, when an excessive load exceeding the tensile force acting during normal operation is applied to this endless operation cord, it has a safety function of being separated by the tensile force to ensure the safety of the resident. Some have a connecting part. However, since this connecting portion has a constant tensile holding force, the safety function does not work for a load less than the tensile holding force.

In addition, although the endless operation code is substantially two hanging, one of the hanging operation codes may be used for an operation different from the other operation code depending on the specifications of the shielding device. Since it is configured to run idle with respect to the drive shaft, the operation cannot be understood at first glance.

Therefore, in order to improve this safety, operability, or operation efficiency, there is a technique to provide a shielding material drive device that changes the bidirectional rotation input in the operation pulley related to the raising and lowering operation of the screen to the one-way rotation input. It is disclosed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2015-55132.

According to the technique of Patent Document 1, safety, operability, or operability, or Operation efficiency can be improved.

However, in the configuration of the shielding material drive device including one rail, it is necessary to use a bidirectional clutch specialized for the specifications of the shielding device, so that from the viewpoint of cost, operability, and safety. There is room for improvement.

In view of the above problems, the present invention is to provide a shielding device capable of improving cost and operability, and more preferably enhancing safety.

The shielding device according to the present invention is a shielding device that can open and close one shielding material (screen 11 in the example of the first embodiment described later), and is an operation source having a rotating shaft that rotates in both directions (a first described later). In the example of one embodiment, the operation pulley 13 or the electric motor as a modified example ) and the rotation of the rotating shaft are input, and one of the two-way rotations of the rotating shaft is transmitted to the first clutch output shaft. However, regarding the other rotation, the clutch mechanism transmitted to the second clutch output shaft, the first input shaft rotated by the one rotation in the first clutch output shaft, and the second clutch output shaft. A shielding material that converts the rotation of a plurality of input shafts composed of a second input shaft that rotates by the other rotation into one-way rotation and transmits the shielding material to one drive shaft for opening and closing the one shielding material. It is characterized by including a drive device.
As a result, cost and operability can be improved, and it is possible to improve safety by making any of the operation cords, which are preferably mounted on the operation pulley as the operation source and hung down two front and rear, into an end shape. It is possible to configure a cloaking device that can be used.

Further, in the shielding device according to the present invention, the shielding material driving device has a first intermediate gear that rotates with the rotation of the first input shaft and a second intermediate gear that rotates with the rotation of the second input shaft. The gear mechanism includes two intermediate gears, and has a gear mechanism in which the first intermediate gear and the second intermediate gear are meshed with each other. It is characterized in that it is configured to be converted into one-way rotation via a mechanism and transmitted to the drive shaft.

Further, in the shielding device according to the present invention, the operation source is composed of an operation pulley on which an operation code is hooked, and the operation code is composed of two end-shaped cords hooked on the operation pulley and hung back and forth. It is characterized by becoming.

According to the present invention, cost and operability can be improved, and more preferably safety can be enhanced.

It is a front view which shows the schematic structure of the pleated screen configured as the shielding device of 1st Embodiment by this invention. It is a side view which shows the schematic structure of the pleated screen configured as the shielding device of 1st Embodiment by this invention. It is a top view which shows the schematic structure of the pleated screen configured as the shielding device of 1st Embodiment by this invention. It is a side view which shows the schematic structure of the operation device of the pleated screen and the shielding material driving device configured as the shielding device of 1st Embodiment by this invention. (A) and (b) are a partial plan view showing the first operation of the pleated screen operating device and the shielding material driving device configured as the shielding device of the first embodiment according to the present invention, respectively, and the first. 1 is a side view schematically showing the operation of the pleated screen corresponding to the operation of 1, and (c) and (d) are a pleated screen operating device and a pleated screen operating device configured as a shielding device of the first embodiment according to the present invention, respectively. It is a partial plan view which shows the 2nd operation of a shielding material drive device, and the side view which shows the operation of the pleats screen corresponding to this 2nd operation schematically. It is a front view which shows the schematic structure of the pleated screen configured as the shielding device of 2nd Embodiment by this invention. It is a side view which shows the schematic structure of the pleated screen configured as the shielding device of 2nd Embodiment by this invention. It is a top view which shows the schematic structure of the pleated screen configured as the shielding device of 2nd Embodiment by this invention. (A) and (b) are perspective views which show the schematic structure of the shielding material driving apparatus of the pleated screen configured as the shielding apparatus of the 2nd Embodiment by this invention, respectively. It is an exploded perspective view which shows the schematic structure of the shielding material driving apparatus of the pleated screen configured as the shielding device of 2nd Embodiment by this invention. (A) and (b) are plan views showing the operation of the shielding material driving device at the time of each operation of the upper screen and the lower screen in the pleated screen configured as the shielding device of the second embodiment according to the present invention, respectively. (A) and (b) are a partial plan view showing the first operation of the pleated screen operating device and the shielding material driving device configured as the shielding device of the second embodiment according to the present invention, respectively, and the first. 1 is a side view schematically showing the operation of the pleated screen corresponding to the operation of 1, and (c) and (d) are a pleated screen operating device and a pleated screen operating device configured as a shielding device of the second embodiment according to the present invention, respectively. It is a partial plan view which shows the 2nd operation of a shielding material drive device, and the side view which shows the operation of the pleats screen corresponding to this 2nd operation schematically. (A) and (b) are a partial plan view showing a third operation of the pleated screen operating device and the shielding material driving device configured as the shielding device of the second embodiment according to the present invention, respectively, and the first. 1 is a side view schematically showing the operation of the pleated screen corresponding to the operation of 1, and (c) and (d) are a pleated screen operating device and a pleated screen operating device configured as a shielding device of the second embodiment according to the present invention, respectively. It is a partial plan view which shows the 4th operation of a shielding material drive device, and the side view which shows the operation of the pleats screen corresponding to this 2nd operation schematically. It is a top view which shows the schematic structure of the pleated screen of the modification which is configured as the shielding device of 2nd Embodiment by this invention. (A) and (b) are plan views showing the operation of the shielding material driving device at the time of each operation of the upper screen and the lower screen in the pleated screen of the modified example configured as the shielding device of the second embodiment according to the present invention, respectively. Is. It is a front view which shows the schematic structure of the pleated screen configured as the shielding device of 3rd Embodiment by this invention. It is a side view which shows the schematic structure of the pleated screen configured as the shielding device of 3rd Embodiment by this invention. It is a side view which shows the schematic structure when the upper screen of the pleated screen configured as the shielding device of 3rd Embodiment by this invention is folded. It is a top view which shows the schematic structure of the pleated screen configured as the shielding device of 3rd Embodiment by this invention. It is a perspective view which shows the schematic structure of the shielding material drive device with the automatic folding detection of the pleated screen configured as the shielding device of 3rd Embodiment by this invention. FIG. 5 is an exploded perspective view showing a schematic configuration of a convolution detection mechanism together with a switching unit in a shielding material driving device in a pleated screen configured as a shielding device according to a third embodiment of the present invention. (A) and (b) are a plan view and a cross-sectional view showing a schematic configuration of a shielding material driving device with automatic folding detection of a pleated screen configured as a shielding device of the third embodiment according to the present invention, respectively. (A) and (b) are partial simplified cross-sectional views showing the first operation of the shielding material driving device with automatic folding detection of the pleated screen configured as the shielding device of the third embodiment according to the present invention, respectively. (C) and (d) are partial views showing a second operation of a shielding material driving device with automatic folding detection of a pleated screen configured as a shielding device according to a third embodiment of the present invention, respectively. It is a simplified cross-sectional view and a plan view. It is a figure which shows the schematic structure of the guide groove of the stopper function part of the automatic convolution detection unit of the pleated screen configured as the shielding device of 3rd Embodiment by this invention. (A) is a front view simply showing the overall operation of the pleated screen configured as the shielding device of the third embodiment according to the present invention, and (b) and (c) are the overall operations of the pleated screen, respectively. FIG. 3 is a partial simplified cross-sectional view and a plan view showing the operation of the corresponding shielding material drive device with automatic folding detection. It is a side view which shows the schematic structure of the pleated screen configured as the shielding device of 4th Embodiment by this invention. It is a top view which shows the schematic structure of the pleated screen configured as the shielding device of 4th Embodiment by this invention. (A) and (b) are a partial plan view showing the first operation of the pleated screen operating device and the shielding material driving device configured as the shielding device of the fourth embodiment according to the present invention, respectively, and the first. 1 is a side view schematically showing the operation of the pleated screen corresponding to the operation of 1, and (c) and (d) are a pleated screen operating device and a pleated screen operating device configured as a shielding device of the fourth embodiment according to the present invention, respectively. It is a partial plan view which shows the 2nd operation of a shielding material drive device, and the side view which shows the operation of the pleats screen corresponding to this 2nd operation schematically.

Hereinafter, the pleated screen configured as the shielding device of each embodiment according to the present invention will be described with reference to the drawings. In the specification of the present application, with respect to the front view of the pleated screen shown in FIG. 1, the upper side and the lower side of the drawing are upward (or upper) and lower (or lower) according to the hanging direction of the screen, respectively. It will be defined and described by defining the left direction in the figure as the left side of the pleated screen and the right direction in the figure as the right side of the pleated screen. Further, the side on which the front view of FIG. 1 is visually recognized is the front side (indoor side), and the opposite side is the rear side (outdoor side).

[First Embodiment]
(overall structure)
FIG. 1 is a front view showing a schematic configuration of a pleated screen configured as a shielding device according to the first embodiment of the present invention. FIG. 2 is a side view showing a schematic configuration of a pleated screen configured as a shielding device according to the first embodiment of the present invention. Further, FIG. 3 is a plan view showing a schematic configuration of a pleated screen configured as a shielding device according to the first embodiment of the present invention.

In the pleated screen of the first embodiment, the upper edge portion of the screen 11 that can be bent in a zigzag shape in the vertical direction is suspended and supported from the head box 1, and the screen 11 is raised and lowered by the operating device 3 to increase the amount of lighting. It is adjusted as appropriate. The head box 1 is fixed to the mounting surface via the bracket 2.

In the pleated screen of the first embodiment, the bottom rail 12 is attached to the lower edge portion of the screen 11.

As shown in FIG. 2, a plurality of elevating cords 18 are inserted on both sides of the screen 11 in the width direction, and the lower ends of the elevating cords 18 are attached to the bottom rail 12.

The upper end of each elevating cord 18 is wound around a winding shaft 5 rotatably supported by a support member in the head box 1 as shown in FIGS. 1 and 3.

As shown in FIG. 1, the pleated screen of the present embodiment is provided with a hexagonal rod-shaped first drive shaft 7a and a hexagonal rod-shaped second drive shaft 7b.

A second drive shaft 7b is inserted through each take-up shaft 5 so as to be relatively non-rotatable. Then, when the second drive shaft 7b is rotated in the winding direction of the elevating cord 18, the elevating cord 18 is wound around each winding shaft 5.

An operating device 3 for rotationally driving the second drive shaft 7b is attached to one end of the head box 1. The detailed configuration of the operating device 3 will be described later, but an operating pulley 13 in the case 31 is rotatably supported on the base end side of the operating device 3, and the operating pulley 13 has an operation code having both ends (for example, an operation code (for example). , Ball chain) 14 is hung and hung down in the front and back. The operation pulley 13 can be rotationally driven by operating the operation code 14.

A first grip 16a is attached to one end of the operation code 14, and a second grip 16b is attached to the other end of the operation code 14. A first limiting member 15a that limits the pulling operation range is provided on the operation code 14 hanging from the front side of the operation pulley 13, and the pulling member 15a is provided on the operation code 14 hanging from the rear side of the operation pulley 13. A second limiting member 15b that limits the operating range is provided.

The second drive shaft 7b is inserted into the stopper device 8 in the head box 1. This stopper device 8 has a known function of preventing the weight of the bottom rail 12 from dropping when the operation code 14 is released after the operation of pulling up the bottom rail 12. The governor device 9 is arranged on the side of the stopper device 8. The governor device 9 is a device that brakes the bottom rail 12 so as to maintain its descent speed below a certain level when the bottom rail 12 is lowered by its own weight.

At the other end of the head box 1, a lower limit limit device 10 for setting the maximum rewinding amount of the elevating cord 18 on the take-up shaft 5 and setting the lower limit position of the bottom rail 12 is arranged.

The screen 11 is provided with joint pieces 11b at the upper and lower edges of the fabric provided with the creases 11a, and the joint pieces 11b are formed by means such as welding.

Then, the elevating cord 18 hanging from the head box 1 is inserted through the hole provided in the joint piece 11b of the screen 11, and the lower end of the elevating cord 18 is attached to the bottom rail 12.

As shown in FIG. 2, a pitch holding cord 17 is arranged on the back side of the screen 11 at the insertion position of the elevating cord 18. The pitch holding code 17 operates so as to make the pitch of the folds of the screen 11 constant. An elevating cord 18 is inserted through the annular support cords 17a provided in large numbers at equal intervals on the pitch holding cords 17. Then, when the bottom rail 12 is lowered and the screen 11 is stretched, the joint piece 11b is supported by the support cord 17a so that the folds of the screen 11 are held at substantially equal intervals.

By the way, in the pleated screen of the present embodiment, in order to raise and lower one screen 11, conventionally, one drive shaft is configured, but as shown in FIG. 1, the first drive shaft 7a is used. A second drive shaft 7b is provided. Then, as will be described in detail with reference to FIG. 4, in the operation device 3, the rotation of the operation pulley 13 is caused by either the first drive shaft 7a or the second drive shaft 7b according to the rotation direction of the operation pulley 13. A two-axis clutch mechanism 4 that transmits only to one of them is provided.

Further, the first drive shaft 7a and the second drive shaft 7b are provided with intermediate gears 6a and 6b for interlocking rotation in opposite directions to each other. When the rotation shaft of the operation pulley 13 is used as an input source, the intermediate gears 6a and 6b cooperate with the two-axis clutch mechanism 4 in the operation device 3 to change the bidirectional rotation of the operation pulley 13 to one-way rotation. It functions as a shielding material driving device 6 for a two-axis clutch that is converted and rotationally transmitted to the second drive shaft 7b.

Therefore, in the present embodiment, the first and second drive shafts 7a and 7b, which are the input sides of the intermediate gears 6a and 6b, are used as input shafts, and the output side of the intermediate gears 6a and 6b is based on the rotation of the input shafts. It is configured as a shielding material driving device 6 having the first and second driving shafts 7a and 7b as output shafts.

Hereinafter, with reference to FIG. 4, the clutch mechanism 4 in the operating device 3 and the shielding material driving device 6 including the intermediate gears 6a and 6b that operate in cooperation with the clutch mechanism will be described in order.

(Operating device)
As shown in FIG. 4, the operation pulley 13 is rotatably supported on the base end side in the case 31 of the operation device 3, and the operation cord 14 having both ends is hooked on the operation pulley 13 and hangs downward. Has been done. The operation pulley 13 can be rotationally driven by operating the operation code 14.

A gear 13a is integrally formed on the operation pulley 13, and a transmission gear 32 rotatably supported by the case 31 is meshed with the gear 13a. Therefore, when the operation pulley 13 is rotated, the transmission gear 32 is rotated.

The clutch mechanism 4 includes a pair of first and second clutch gears 40a and 40b, and first and second transmission clutches 41a and 41b.

A pair of first and second clutch gears 40a and 40b rotatably supported by the case 31 are meshed with the transmission gear 32 on both radial sides of the transmission gear 32. Then, when the transmission gear 32 is rotated, the first and second clutch gears 40a and 40b are rotated in the same direction.

The first and second transmission clutches 41a and 41b having the same configuration are housed on the tip end side of the case 31, and the input shafts 42 of the first and second transmission clutches 41a and 41b are the first and second clutches. It is fitted in the center of the gears 40a and 40b. Therefore, when the first and second clutch gears 40a and 40b are rotated, the input shafts 42 of the first and second transmission clutches 41a and 41b are rotated in the same direction.

The first and second transmission clutches 41a and 41b are configured to transmit only one direction rotation of the input shaft 42 to the output shaft 43, respectively, and the transmission directions are opposite to each other. Then, the end of the first drive shaft 7a is fitted to the output shaft 43 of the first transmission clutch 41a, and the end of the second drive shaft 7b is fitted to the output shaft 43 of the second transmission clutch 41b. Has been done.

(Shielding material drive device)
As shown in FIG. 4, the shielding material drive device 6 in the present embodiment includes an intermediate gear 6a that rotates integrally with the first drive shaft 7a fitted to the output shaft 43 of the first transmission clutch 41a, and a second gear. It is composed of an intermediate gear 6b that rotates integrally with a second drive shaft 7b fitted to the output shaft 43 of the transmission clutch 41b of 2.

The intermediate gears 6a and 6b are meshed with each other, and the first drive shaft 7a and the second drive shaft 7b are interlocked and rotated in opposite directions.

However, as shown in FIG. 4, when the operation pulley 13 rotates in the A direction, only the output shaft 43 of the first transmission clutch 41a is rotationally transmitted in the A'direction in the same direction as the A direction, and the second transmission clutch 41a is rotated. The output shaft 43 of the transmission clutch 41b slips and is not rotationally transmitted. When the first drive shaft 7a rotates in the A'direction, the second drive shaft 7b is rotationally transmitted via the intermediate gears 6a and 6b.

Further, when the operation pulley 13 rotates in the B direction, only the output shaft 43 of the second transmission clutch 41b is rotationally transmitted in the B'direction in the same direction as the B direction, and the output shaft 43 of the first transmission clutch 41a. Will slip and will not be rotated.

Therefore, regardless of whether the operation pulley 13 rotates in either the A direction or the B direction, the output shafts 43 of the first and second transmission clutches 41a and 41b are shown as shown without rotation inconsistency. The second drive shaft 7b rotates in the C direction in the same direction as the B'direction due to the rotation in the directions (A'and B'directions). On the other hand, the rotation in the D direction from the second drive shaft 7b idles in both the first and second transmission clutches 41a and 41b, and does not rotate and transmit to the operation pulley 13.

With such a configuration, as shown in FIG. 2, when the first grip 16a attached to the operation code 14 to be hung on the front side is pulled, and to be attached to the operation code 14 to be hung on the rear side. The screen 11 can be raised in any operation when the second grip 16b is pulled, and the stopper device 8 is operated in any of the operations of the first and second grips 16a and 16b. The screen 11 can be lowered by its own weight by releasing it.

That is, when the pulling operation of the first grip 16a attached to the operation code 14 suspended on the front side as shown in FIG. 5 (b) is performed, the second drive shaft 7b is performed as shown in FIG. 5 (a). Rotates in the direction shown in the drawing, the elevating cord 18 is wound around the winding shaft 5, and the bottom rail 12 is pulled up. Then, when the first grip 16a is released after the bottom rail 12 is pulled up to a desired height, the stopper device 8 is locked by the self-weight descent prevention operation, and the bottom rail 12 is held at the desired height. Further, when the stopper device 8 is unlocked by a slight pulling operation of the first grip 16a, the second drive shaft 7b rotates in the direction opposite to the direction shown in the drawing, and idles with respect to the operation pulley 13. The bottom rail 12 descends to the lower limit position without rotation transmission.

Similarly, when the second grip 16b attached to the operation code 14 suspended on the rear side is pulled as shown in FIG. 5 (d), the first drive is performed as shown in FIG. 5 (c). The shaft 7a rotates in the direction shown in the drawing, the elevating cord 18 is wound around the winding shaft 5, and the bottom rail 12 is pulled up. Then, when the second grip 16b is released after the bottom rail 12 is pulled up to a desired height, the stopper device 8 is locked by the self-weight descent prevention operation, and the bottom rail 12 is held at the desired height. Further, when the stopper device 8 is unlocked by a slight pulling operation of the second grip 16b, the second drive shaft 7b rotates in the direction opposite to the direction shown in the drawing and idles with respect to the operation pulley 13. The bottom rail 12 descends to the lower limit position without rotation transmission.

Therefore, according to the pleated screen of the present embodiment, the same ascending / descending operation is performed regardless of which of the two operation codes 14 hanging back and forth is operated, so that the operation can be understood at first glance and the operability is improved. Further, according to the pleated screen of the present embodiment, since the operation code 14 is not configured endlessly, the safety can be further enhanced.

In particular, according to the pleated screen of the present embodiment, the operation device 3 can be shared with the operation device 3 in the pleated screen provided with the intermediate rail 20 described below, and is shielded as a dedicated component. Since only the intermediate gears 6a and 6b constituting the material drive device 6 are used, it contributes to cost reduction.

[Second Embodiment]
(overall structure)
FIG. 6 is a front view showing a schematic configuration of a pleated screen configured as a shielding device according to a second embodiment of the present invention. FIG. 7 is a side view showing a schematic configuration of a pleated screen configured as a shielding device according to a second embodiment of the present invention. Further, FIG. 8 is a plan view showing a schematic configuration of a pleated screen configured as a shielding device according to the second embodiment of the present invention. The same reference numbers are given to the components similar to the pleated screen of the first embodiment.

In the pleated screens shown in FIGS. 6 to 8, the upper screen 11U is suspended and supported from the head box 1, and the intermediate rail 20 is attached to the lower end of the upper screen 11U. Further, the lower screen 11L is suspended and supported from the intermediate rail 20, and the bottom rail 12 is attached to the lower end of the lower screen 11L.

The upper screen 11U is a semi-transparent fabric such as a lace fabric that can be folded in a zigzag shape, and the lower screen 11L is a fabric having a light-shielding property that can be folded in a zigzag shape, for example.

The upper screen 11U and the lower screen 11L are provided with joint pieces 11b at the upper and lower edges of the fabric provided with the creases 11a, and the joint pieces 11b are formed by means such as welding.

The first and second elevating cords 18 and 19 hanging from the head box 1 are inserted through the holes provided in the joint piece 11b on both sides of the upper screen 11U in the width direction, and the second elevating cords are inserted. The lower end of 19 is attached to the intermediate rail 20. The first elevating cord 18 penetrates the intermediate rail 20 and is further inserted into the lower screen 11L, and the lower end of the first elevating cord 18 is attached to the bottom rail 12.

As shown in FIG. 7, at the insertion positions of the first and second elevating cords 18 and 19, on the back side of the upper screen 11U and the lower screen 11L, between the head box 1 and the intermediate rail 20, and the intermediate rail 20 and Pitch holding cords 17 are arranged between the bottom rails 12. Each pitch holding code 17 operates so as to make the pitch of the folds of the upper screen 11U and the lower screen 11L constant. The first and second elevating cords 18 and 19 are inserted through a large number of annular support cords 17a provided at equal intervals by the pitch holding cords 17 on the back side of the upper screen 11U. Further, a first elevating cord 18 is inserted through a large number of annular support cords 17b provided at equal intervals by pitch holding cords 17 on the back side of the lower screen 11L.

Then, when the intermediate rail 20 is lowered to extend the upper screen 11U, the joint piece 11b of the upper screen 11U is supported by the support cord 17a, and the folds of the upper screen 11U are held at substantially equal intervals. .. Further, when the bottom rail 12 is lowered to extend the lower screen 11L, the joint piece 11b is supported by the support cord 17b so that the folds of the lower screen 11L are held at substantially equal intervals.

The upper ends of the first and second elevating cords 18 and 19 are wound around the first and second winding shafts 5F and 5R rotatably supported by the support member in the head box 1, respectively. That is, as shown in FIG. 8, the first and second take-up shafts 5F and 5R are supported in the head box 1 in a horizontal parallel position above the first and second elevating cords 18 and 19. It is rotatably supported by the member.

Then, the upper end of the first elevating cord 18 is wound around the first take-up shaft 5F, and the upper end of the second elevating cord 19 is wound around the second take-up shaft 5R. The elevating cords 18 and 19 of No. 2 are wound around the first and second take-up shafts 5F and 5R in opposite directions to each other. Further, the first and second elevating cords 18 and 19 are spirally wound or rewound based on the rotation of the first and second winding shafts 5F and 5R.

An operating device 3 having the same structure as that of the first embodiment shown in FIG. 4 is attached to one end of the head box 1. The operation pulley 13 in the case 31 is rotatably supported on the base end side of the operation device 3, and an operation code (for example, a ball chain) 14 having both ends is hooked on the operation pulley 13 to move downward in the front-rear direction. It is hanging down. The operation pulley 13 can be rotationally driven by operating the operation code 14.

A first grip 16a is attached to one end of the operation code 14, and a second grip 16b is attached to the other end of the operation code 14. A first limiting member 15a that limits the pulling operation range is provided on the operation code 14 hanging from the front side of the operation pulley 13, and the pulling member 15a is provided on the operation code 14 hanging from the rear side of the operation pulley 13. A second limiting member 15b that limits the operating range is provided.

The operating device 3 has a two-axis clutch mechanism 4 that transmits the rotation of the operating pulley 13 to only one of the first drive shaft 7a and the second drive shaft 7b according to the rotation direction of the operating pulley 13. It is provided (see FIG. 4).

That is, the first and second transmission clutches 41a and 41b in the clutch mechanism 4 in the operating device 3 are configured to transmit only one direction rotation of the input shaft 42 to the output shaft 43, respectively, and the transmission direction is They are in opposite directions. Then, the end of the first drive shaft 7a is fitted to the output shaft 43 of the first transmission clutch 41a, and the end of the second drive shaft 7b is fitted to the output shaft 43 of the second transmission clutch 41b. Has been done.

A hexagonal rod-shaped third drive shaft 7F is inserted into the first take-up shaft 5F so as to be relatively non-rotatable, and a hexagonal rod-shaped fourth drive shaft 7R is also inserted into the second take-up shaft 5R so as to be relatively non-rotatable. It has been inserted. Then, when the third drive shaft 7F is rotated in the winding direction of the first elevating cord 18, the first elevating cord 18 is wound around the first winding shaft 5F, and the fourth drive shaft 7R Is rotated in the winding direction of the second elevating cord 19, the second elevating cord 19 is wound around the second take-up shaft 5R.

The third and fourth drive shafts 7F and 7R are inserted into the stopper devices 8F and 8R in the head box 1, respectively. The stopper device 8F has a known function of preventing the weight of the bottom rail 12 from dropping when the operation code 14 is released after the operation of pulling up the bottom rail 12. The stopper device 8R has a known function of preventing the weight of the intermediate rail 20 from dropping when the operation code 14 is released after the operation of pulling up the intermediate rail 20. Governor devices 9F and 9R are arranged on the sides of the stopper devices 8F and 8R. Each governor device 9F, 9R is a device that brakes the bottom rail 12 and the intermediate rail 20 so as to maintain the descent speed below a certain level when the bottom rail 12 and the intermediate rail 20 are lowered by their own weight.

At the other end of the head box 1, a lower limit limit device 10F for setting the maximum rewinding amount of the elevating cord 18 on the first take-up shaft 5F and setting the lower limit position of the bottom rail 12 is arranged, and further. , A lower limit limit device 10R is provided which sets the maximum rewinding amount of the elevating cord 19 on the second take-up shaft 5R and sets the lower limit position of the intermediate rail 20. However, the lower limit limit devices 10F and 10R do not necessarily have to be provided.

By the way, in the pleated screen of the present embodiment, as shown in FIGS. 6 and 8, 2 in the operating device 3 is provided between the operating device 3 and the first and second winding shafts 5F and 5R on the right side. A two-axis clutch that, in cooperation with the clutch mechanism 4 of the shaft, converts the bidirectional rotation of the operation pulley 13 into one-way rotation and transmits the rotation to the third and fourth drive shafts 7F and 7R so as to be switchable. A shielding material driving device 60 for use and a stopper device 21 for a switching cord 22 capable of switching rotation transmission to the third and fourth drive shafts 7F and 7R are arranged.

As shown in FIG. 8, the shield material driving device 60 connects the first and second drive shafts 7a and 7b to the input side and the third and fourth drive shafts 7F and 7R to the output side. The shielding material drive device 60 will be described in detail later, but as a main component, a pair of intermediate gears 66a and 66b that rotate integrally with the first and second drive shafts 7a and 7b and rotate in conjunction with each other. And the third and fourth transmission clutches 63 and 64 that can transmit only the rotation of the intermediate gears 66a and 66b in one direction to either of the third and fourth drive shafts 7F and 7R, respectively, and the third. And a switching unit 65 for switching the connection of the fourth transmission clutches 63 and 64.

In the present embodiment, one end of the switching cord 22 is attached to the switching unit 65, and the other end of the switching cord 22 is inserted from the lower surface opening 1a of the head box 1 as shown in FIG. 6 after passing through the stopper device 21. It is led out to the outside, hangs down, and is attached to the switching grip 23.

Then, as shown in FIG. 8, the switching unit 65 is relatively moved via the stopper device 21 by the pulling operation of the switching cord 22 and the switching grip 23, whereby the third and fourth transmission clutches 63 and 64 are connected. In order to enable switching, the compression spring 67 that urges the switching unit 65 to move relative to the left in the shielding material driving device 60 in the direction opposite to the pulling operation direction of the switching cord 22 always drives the shielding material. It is provided in the device 60.

Hereinafter, the configuration and operation of the shielding material driving device 60 will be described more specifically with reference to FIGS. 9 to 13.

(Shielding material drive device)
9 (a) is a perspective view showing a schematic configuration of a shield material driving device 60 of a pleated screen configured as a shield device of the second embodiment according to the present invention, respectively, and FIG. 9 (b) shows a shield material. The perspective view when the upper case 61 of the drive device 60 was removed is shown. Further, FIG. 10 shows an exploded perspective view showing a schematic configuration of the shielding material driving device 60 when the upper case 61 is removed.

As shown in FIG. 9, in the shielding material driving device 60, the upper case 61 and the lower case 62 accommodate the third and fourth transmission clutches 63 and 64, the switching unit 65, and the pair of intermediate gears 66a and 66b. There is. The intermediate gears 66a and 66b are provided with input shafts 601, 602 for fitting the first and second drive shafts 7a and 7b, respectively. On the other hand, the third and fourth transmission clutches 63 and 64 are provided with output shafts 603 and 604 for fitting the third and fourth drive shafts 7F and 7R, respectively. The switching unit 65 slides in the axial direction (both shown in the figure) so that only one direction rotation of the intermediate gears 66a and 66b can be transmitted to either of the third and fourth drive shafts 7F and 7R. The connection of the third and fourth transmission clutches 41a and 41b can be switched by the direction of the arrow). A slide piece 651 is provided in the center of the top of the switching unit 65, and the slide piece 651 is penetrated through the guide hole 61a provided in the upper case 61, so that the sliding movement of the switching unit 65 in the axial direction is stable. It will be.

As shown in FIG. 10, the third transmission clutch 63 includes an output shaft member 631, clutch gears 632, 633, and a clutch spring 634.

The output shaft member 631 is provided with an output shaft 603 for fitting a third drive shaft 7F. An annular groove 6311 is formed on the tip end side of the output shaft member 631, and the output shaft member 631 is engaged and mounted in a bearing portion 620a of the lower case 62 (not shown, but the same applies to the upper case 61) so as to be relatively rotatable. The hexagonal shaft portion 6312 protruding toward the base end side of the output shaft member 631 is inserted into the hexagonal hole 6332 of the clutch gear 633 in a state where the clutch spring 634 is mounted so as not to rotate relative to the hexagonal shaft portion 6312. It is engaged with the clutch gear 633 by a pair of claws 6313 formed on the clutch gear 633.

Since the clutch spring 634 is composed of a compression spring, the clutch gear 633 is always urged in a direction away from the output shaft member 631 within a range locked by the pair of claw portions 6313. The peripheral surface 6331 of the clutch gear 633 is engaged and mounted on the circular hole portion 653a of the switching unit 65 so as to be relatively rotatable and axially movable. In other words, the switching unit 65 can slide and move in the axial direction within the range in which the peripheral surface 6331 of the clutch gear 633 is engaged and mounted on the circular hole portion 653a.

The clutch gear 632 has an annular groove 6321 formed on the base end side and is rotatable relative to a substantially semi-annular protrusion 654a formed in the axial direction of the circular hole portion 653a of the switching unit 65, but is relative to the axial direction. It is immovably engaged and mounted. In other words, the clutch gear 632 moves integrally with the axial slide movement of the switching unit 65.

Therefore, depending on the axial slide movement of the switching unit 65, the uneven portion 6333 formed on the base end surface of the clutch gear 633 and the uneven portion 6323 formed on the tip end surface of the clutch gear 632 mesh with each other. A state of not meshing with a state of doing is formed. That is, when the switching unit 65 slides relatively toward the output shaft member 631, the clutch gear 633 and the clutch gear 632 are smoothly meshed by the action of the clutch spring 634, and the rotation of the clutch gear 632 is output. Rotationally transmitted to the shaft member 631 in the same direction. On the other hand, when the switching unit 65 slides relatively away from the output shaft member 631, the clutch gear 633 and the clutch gear 632 are disengaged, so that the rotation of the clutch gear 632 moves to the output shaft member 631. Does not transmit rotation.

A hexagonal hole 6322 is formed in the clutch gear 632, and a hexagonal shaft portion 662 protruding toward the tip side from the round shaft portion 661 at the center of the shaft of the intermediate gear 66a is fitted and inserted into the hexagonal hole 6322. Therefore, when the intermediate gear 66a rotates, the clutch gear 632 also rotates integrally.

On the other hand, the fourth transmission clutch 64 includes an output shaft member 641, clutch gears 642, 643, and a clutch spring 644.

The output shaft member 641 is provided with an output shaft 604 to which a fourth drive shaft 7R is fitted. An annular groove 6411 is formed on the tip side of the output shaft member 641, and the output shaft member 641 is engaged and mounted in a bearing portion 620b of the lower case 62 (not shown, but the same applies to the upper case 61) so as to be relatively rotatable. The hexagonal shaft portion 6412 protruding toward the proximal end side of the output shaft member 641 is inserted into the hexagonal hole 6422 of the clutch gear 642 so as not to rotate relative to each other.

The clutch gear 642 has an annular groove 6421 formed on the base end side and is relatively rotatable on the substantially semi-annular protrusion 654b of the switching unit 65, but is engaged and mounted so as not to be relatively movable in the axial direction. In other words, the clutch gear 642 moves integrally with the axial slide movement of the switching unit 65.

A hexagonal hole 6432 is formed in the clutch gear 643, and the hexagonal shaft portion 665 protruding toward the tip side from the round shaft portion 665 at the center of the shaft of the intermediate gear 66b is relative to the hexagonal hole 6432 with the clutch spring 634 attached. It is inserted non-rotatably and is engaged with the clutch gear 643 by a pair of claws 666 formed at the ends of the hexagonal shaft portion 665. Therefore, when the intermediate gear 66b rotates, the clutch gear 643 also rotates integrally.

Since the clutch spring 644 is composed of a compression spring, the clutch gear 643 is always urged in a direction away from the intermediate gear 66b within a range locked by the pair of claws 666. The peripheral surface 6431 of the clutch gear 643 is engaged and mounted on the circular hole portion 653b of the switching unit 65 so as to be relatively rotatable and axially movable. In other words, the switching unit 65 can slide and move in the axial direction within the range in which the peripheral surface 6431 of the clutch gear 643 is engaged and mounted on the circular hole portion 653b.

Therefore, depending on the axial slide movement of the switching unit 65, the uneven portion 6433 formed on the tip surface of the clutch gear 643 and the uneven portion 6423 formed on the base end surface of the clutch gear 642 mesh with each other. A state of not meshing with a state of doing is formed. That is, when the switching unit 65 slides relatively in the direction approaching the intermediate gear 66b, the clutch gear 643 and the clutch gear 642 are smoothly meshed by the action of the clutch spring 644, and the rotation of the clutch gear 643 is the output shaft. Rotationally transmitted to the member 641 in the same direction. On the other hand, when the switching unit 65 slides relatively away from the intermediate gear 66b, the clutch gear 643 and the clutch gear 642 are disengaged, so that the rotation of the clutch gear 643 rotates to the output shaft member 641. Do not communicate.

The clutch gears 642 and 643 may have the same shape as the clutch gears 632 and 633, respectively, and the clutch spring 644 may have the same spring pressure as the clutch spring 634.

As described above, the switching unit 65 is housed in the lower case 62 in a state of being combined so that the connection switching of the third and fourth transmission clutches 63 and 64 is possible by the slide movement thereof. Further, in the intermediate gears 66a and 66b, the lower case is in a state where the tooth portions are meshed with each other and the hexagonal shaft portions 662 and 665 are engaged with the input sides of the third and fourth transmission clutches 63 and 64. It is housed in 62. At this time, the third and fourth transmission clutches 63 and 64 are located in the accommodating portions 621a and 621b of the lower case 62, respectively, and the intermediate gears 66a and 66b are located in the accommodating portions 622a and 622b of the lower case 62, respectively. It will be placed.

Round shaft portions 661 and 665 are formed at the center of the shafts on both sides of the intermediate gears 66a and 66b, respectively, in bearing portions 623a and 623b of the lower case 62 (not shown, but the same applies to the upper case 61). It is engaged and mounted so that it can rotate relative to each other.

A slide piece 651 is provided in the center of the top of the switching unit 65, and the slide piece 651 is penetrated through a guide hole 61a provided in the upper case 61 (see FIG. 9) to slide the switching unit 65 in the axial direction. Is performed stably. Further, a bifurcated leg portion 652 extending downward from the round recess 655 is provided in the center of the bottom of the switching unit 65, and the bifurcated leg portion 652 sandwiches the guide piece 624 provided in the lower case 62 for switching. The axial slide movement of the unit 65 is stably performed.

As shown in FIG. 10, an insertion hole 625, 626 for inserting the switching cord 22 shown in FIG. 8 is formed in the wall portion of the lower case 62, and one end of the switching cord 22 is a round recess 655 of the switching unit 65. It is locked by a knot ball or the like at a locking hole (not shown) provided in. The insertion holes 625 and 626 in the lower case 62 are formed as lateral Φ-shaped holes in which a square hole and a round hole are combined. This is to enable the switching bar, which will be described later, to be inserted and used.

Further, in the present embodiment, since the slide movement of the switching unit 65 can be operated by using the switching cord 22 and the stopper device 21, the switching unit 65 is always shielded in the direction opposite to the pulling operation direction of the switching cord 22. A compression spring 67 that urges the drive device 60 to move relative to the output shafts 603 and 604 (left side in the drawing) is engaged with the insertion hole 625 of the lower case 62. For this reason, the insertion hole 625 is formed with a laterally Φ-shaped hole in which a square hole and a round hole are combined, and a round concave portion having a larger diameter than the round hole is formed.

Further, the lower case 62 shown in FIG. 10 is formed with a spring support portion 627, a pair of bearing portions 628, and a through hole 629 so that they can be commonly used in the third embodiment described later. The pair of bearing portions 628 and through holes 629 may be omitted.

As described above, in cooperation with the two-axis clutch mechanism 4 in the operating device 3, the bidirectional rotation of the operating pulley 13 is converted into one-way rotation to the third and fourth drive shafts 7F and 7R. A shielding material driving device 60 for a two-axis clutch is configured to transmit rotation in a switchable manner.

Here, the operation of the operating device 3 and the shielding material driving device 60 will be described with reference to FIG.

First, in the operating device 3, as in the first embodiment shown in FIG. 4, when the operating pulley 13 rotates in the A direction, only the output shaft 43 of the first transmission clutch 41a is A in the same direction as the A direction. 'Rotation is transmitted in the direction, and the output shaft 43 of the second transmission clutch 41b slips and is not rotationally transmitted.

Further, when the operation pulley 13 rotates in the B direction, only the output shaft 43 of the second transmission clutch 41b is rotationally transmitted in the B'direction in the same direction as the B direction, and the output shaft 43 of the first transmission clutch 41a. Will slip and will not be rotated.

Then, the first drive shaft 7a of the intermediate gear 66a having the input shaft 601 is fitted to the shielding material drive device 60 so as to be relatively non-rotatable, and the second drive shaft 7b is fitted to the intermediate gear 66b having the input shaft 602. Is fitted so that it cannot rotate relative to each other. The intermediate gears 66a and 66b mesh with each other and rotate in conjunction with each other in the opposite direction.

Further, in the shielding material driving device 60, a third driving shaft 7F for raising and lowering the lower screen 11L is fitted to the third transmission clutch 63 having the output shaft 603 so as to be relatively non-rotatable, and the output shaft 604 A fourth drive shaft 7R for raising and lowering the upper screen 11U is fitted to the fourth transmission clutch 64 having a relative non-rotatable shape.

(When raising and lowering the upper screen)
As shown in FIG. 11A, in order to raise and lower the upper screen 11U, the switching cord 22 is pulled out (in the direction of the arrow in the figure) and locked by the operation of the stopper device 21. At this time, the switching unit 65 having one end of the switching cord 22 relatively moves (slides) to the right (in the direction of the arrow in the figure) in the shielding material driving device 60 against the urging force of the compression spring 67.

Then, in the shielding material drive device 60, the third transmission clutch 63 is disengaged without the clutch gears 632 and 633 (see FIG. 10) being engaged, and the rotation of the input shaft 601 (that is, the first drive shaft 7a). And the rotation of the input shaft 602 (ie, the second drive shaft 7b) is not rotationally transmitted to the output shaft 603 (ie, is not rotationally transmitted to the third drive shaft 7F).

On the other hand, in the shielding material drive device 60, the fourth transmission clutch 64 is interlocked with the clutch gears 642, 643 (see FIG. 10) meshed with each other, and the rotation of the input shaft 601 (that is, the first drive shaft 7a). And the rotation of the input shaft 602 (ie, the second drive shaft 7b) is rotationally transmitted to the output shaft 604 (ie, rotationally transmitted to the fourth drive shaft 7R).

Therefore, regardless of whether the operation pulley 13 rotates in either the A direction or the B direction, the output shafts 43 of the first and second transmission clutches 41a and 41b are shown as shown without rotation inconsistency. With rotation in the direction (A'and B'direction), the fourth drive shaft 7R rotates in the C direction in the same direction as the B'direction. On the other hand, the rotation in the D direction from the fourth drive shaft 7R idles in both the first and second transmission clutches 41a and 41b, and does not rotate and transmit to the operation pulley 13.

(When raising and lowering the lower screen)
As shown in FIG. 11B, in order to raise and lower the lower screen 11L, the switching cord 22 is slightly pulled out (in the direction of the short arrow in the figure) to release the operation (lock) of the stopper device 21. At this time, the switching unit 65 to which one end of the switching cord 22 is attached moves (slides) to the left (in the direction of the arrow in the figure) in the shielding material driving device 60 due to the urging force of the compression spring 67. The code 22 also moves in the same direction (in the direction of the long arrow in the figure).

Then, in the shielding material drive device 60, the fourth transmission clutch 64 is disengaged without the clutch gears 642, 643 (see FIG. 10) being engaged, and the rotation of the input shaft 601 (that is, the first drive shaft 7a). And the rotation of the input shaft 602 (ie, the second drive shaft 7b) is not rotationally transmitted to the output shaft 604 (ie, is not rotationally transmitted to the fourth drive shaft 7R).

On the other hand, in the shielding material drive device 60, the third transmission clutch 63 is interlocked with the clutch gears 632 and 633 (see FIG. 10) meshed with each other, and the rotation of the input shaft 601 (that is, the first drive shaft 7a). And the rotation of the input shaft 602 (ie, the second drive shaft 7b) is rotationally transmitted to the output shaft 603 (ie, rotationally transmitted to the third drive shaft 7F).

Therefore, regardless of whether the operation pulley 13 rotates in either the A direction or the B direction, the output shafts 43 of the first and second transmission clutches 41a and 41b are shown as shown without rotation inconsistency. With rotation in the direction (A'and B'direction), the third drive shaft 7F rotates in the C direction in the same direction as the A'direction. On the other hand, the rotation in the D direction from the third drive shaft 7F idles in both the first and second transmission clutches 41a and 41b, and does not rotate and transmit to the operation pulley 13.

With such a configuration, in order to raise and lower the upper screen 11U, as shown in FIG. 11A, the switching cord 22 is pulled out, the switching unit 65 is slid and moved in the shielding material driving device 60, and the stopper device is used. The movement of the switching cord 22 is locked by the operation of 21, and only the fourth transmission clutch 64 is set to be rotationally transmitted. Then, as shown in FIG. 7, when the first grip 16a attached to the operation code 14 to be hung on the front side is pulled, and the second grip 16a to be attached to the operation code 14 to be hung on the rear side is to be pulled. The upper screen 11U can be raised in any operation when the grip 16b is pulled, and the upper part is released by releasing the operation of the stopper device 8 in any of the first and second grip 16a and 16b operations. The screen 11U can be lowered by its own weight.

That is, in order to raise and lower the upper screen 11U, the switching cord 22 is pulled out, the switching unit 65 is slid to the right in the figure in the shielding material driving device 60, and the movement of the switching cord 22 is locked by the operation of the stopper device 21. , Only the fourth transmission clutch 64 is set to rotate and transmit. Then, when the pulling operation of the first grip 16a attached to the operation code 14 suspended on the front side is performed as shown in FIG. 12 (b), the second drive shaft 7b is performed as shown in FIG. 12 (a). Rotates in the direction shown in the drawing, is rotationally transmitted to the fourth drive shaft 7R via the shielding material drive device 60, the elevating cord 19 is wound around the second take-up shaft 5R, and the intermediate rail 20 is pulled up. .. Then, when the first grip 16a is released after the intermediate rail 20 is pulled up to a desired height, the stopper device 8R is locked by the self-weight drop prevention operation, and the intermediate rail 20 is held at the desired height. Further, when the stopper device 8R is unlocked by a slight pulling operation of the first grip 16a, the fourth drive shaft 7R and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, and the operation pulley 13 The intermediate rail 20 descends to the lower limit position by its own weight without being rotated and transmitted.

Similarly, in a state where only the fourth transmission clutch 64 in the shielding material driving device 60 is set to rotate and transmit, the second is attached to the operation code 14 which is hung on the rear side as shown in FIG. 12 (d). When the grip 16b is pulled, the first drive shaft 7a rotates in the direction shown in FIG. 12 (c) and rotates to the fourth drive shaft 7R via the shielding material drive device 60. The transmission is transmitted, the elevating cord 19 is wound around the fourth take-up shaft 5R, and the intermediate rail 20 is pulled up. Then, when the second grip 16b is released after the intermediate rail 20 is pulled up to a desired height, the stopper device 8R is locked by the self-weight drop prevention operation, and the intermediate rail 20 is held at the desired height. Further, when the stopper device 8R is unlocked by a slight pulling operation of the second grip 16b, the fourth drive shaft 7R and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, and the intermediate rail 20 Drops its own weight to the lower limit position.

On the other hand, in order to raise and lower the lower screen 11L, the switching cord 22 is slightly pulled out to release the operation of the stopper device 21 to allow the switching cord 22 to move, and the switching unit 65 is shown on the left in the lock shielding material drive device 60. The slide is moved toward the direction, and only the third transmission clutch 63 is set to be rotationally transmitted. Then, when the pulling operation of the first grip 16a attached to the operation code 14 suspended on the front side is performed as shown in FIG. 13 (b), the second drive shaft 7b is performed as shown in FIG. 13 (a). Rotates in the direction shown in the drawing, is rotationally transmitted to the third drive shaft 7F via the shielding material drive device 60, the elevating cord 18 is wound around the first take-up shaft 5F, and the bottom rail 12 is pulled up. .. Then, when the first grip 16a is released after pulling up the bottom rail 12 to a desired height, the stopper device 8F is locked by the self-weight drop prevention operation, and the bottom rail 12 is held at a desired height. Further, when the stopper device 8F is unlocked by a slight pulling operation of the first grip 16a, the third drive shaft 7F and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, and the operation pulley 13 The bottom rail 12 spins idle and the bottom rail 12 descends to the lower limit position without being transmitted.

Similarly, in a state where only the third transmission clutch 63 in the shielding material driving device 60 is set to rotate and transmit, the second is attached to the operation code 14 suspended on the rear side as shown in FIG. 13 (d). When the grip 16b is pulled, the first drive shaft 7a rotates in the direction shown in FIG. 13 (c) and rotates to the third drive shaft 7F via the shielding material drive device 60. It is transmitted, the elevating cord 18 is wound around the third take-up shaft 5F, and the bottom rail 12 is pulled up. Then, when the bottom rail 12 is pulled up to a desired height and then the second grip 16b is released, the stopper device 8F is locked by the self-weight drop prevention operation, and the intermediate rail 20 is held at the desired height. Further, when the stopper device 8F is unlocked by a slight pulling operation of the second grip 16b, the third drive shaft 7F and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, and the bottom rail 12 Drops its own weight to the lower limit position.

Therefore, according to the pleated screen of the present embodiment, even in the form of having a plurality of screens at the top and bottom, two screens to be operated are hung back and forth by selecting the screen to be operated by the pulling operation of the switching code 22. Since the same lifting operation is performed regardless of which operation code 14 is operated, the operation can be understood at a glance and the operability is improved. Further, according to the pleated screen of the present embodiment, since the operation code 14 is not configured endlessly, the safety can be further enhanced.

In particular, according to the pleated screen of the present embodiment, the configuration of the operating device 3 can be shared with the operating device 3 of the pleated screen of the first embodiment, which contributes to cost reduction.

(Modified example of the second embodiment)
FIG. 14 is a plan view showing a schematic configuration of a modified pleated screen configured as a shielding device according to a second embodiment of the present invention. In the pleated screen of the second embodiment shown in FIG. 6 described above, an example of selecting the screen to be operated by the pulling operation of the switching code 22 has been described, but as shown in FIG. 14, the screen to be operated is switched by the switching pole 26. It can be configured to be selected by the rotation operation of.

More specifically, the pleated screen of the modified example shown in FIG. 14 has a switching bar 24 and a switching pole 26 instead of providing the stopper device 21 shown in FIG. 6 and the switching cord 22 having the switching grip 23 attached to one end. It is provided.

One end of the switching bar 24 is attached to the switching unit 65 in the shielding material driving device 60, and the other end of the switching bar 24 is led out from the right end of the head box 1 to the switching box 25. The switching pole 26 is suspended and supported by the switching box 25, and has a gear 26a at the tip thereof that meshes with the tooth portion 24a provided at the other end of the switching bar 24.

As shown in FIG. 10 described above, the wall portion of the lower case 62 in the shielding material driving device 60 is provided with insertion holes 625 and 626 formed of laterally Φ-shaped holes, and the switching bar 24 is inserted through the insertion holes 625 and 626. One end of the switching bar 24 is attached to the switching unit 65 in the shielding material driving device 60.

That is, as shown in FIG. 15A, when the upper screen 11U is moved up and down, the switching pole 26 is rotated in the direction of the arrow in the figure, and the switching unit 65 is slid to the right in the figure via the switching bar 24. It is moved and set so that only the fourth transmission clutch 64 is rotationally transmitted.

On the other hand, when the lower screen 11L is moved up and down, the switching pole 26 is rotated in the direction of the arrow shown in the figure, the switching unit 65 is slid to the left in the figure via the switching bar 24, and only the third transmission clutch 63 is operated. Is set to rotate and transmit.

Thereby, the same operation and effect as in FIG. 13 described above can be obtained.

[Third Embodiment]
(overall structure)
FIG. 16 is a front view showing a schematic configuration of a pleated screen configured as a shielding device according to a third embodiment of the present invention. FIG. 17 is a side view showing a schematic configuration of a pleated screen configured as a shielding device according to a third embodiment of the present invention, and FIG. 18 shows a schematic configuration when the upper screen 11U thereof is folded. It is a side view. Further, FIG. 19 is a plan view showing a schematic configuration of a pleated screen configured as a shielding device according to a third embodiment of the present invention. The same reference numbers are given to the components similar to the pleated screen of the second embodiment.

The pleated screen of the third embodiment shown in FIGS. 16 to 19 has an upper screen 11U and a lower screen 11L, and is the same regardless of which operation code 14 is hung back and forth between the two screens to be operated. It is the same as the second embodiment in that it is configured to be an elevating operation. However, in the second embodiment described above, a configuration example in which the screen to be operated is selected by the switching code 22 or the switching pole 26 has been described, but in the pleated screen of the third embodiment, the screen to be operated is used. The difference is that it is configured to switch automatically.

Therefore, in the pleated screen of the third embodiment, instead of providing the stopper device 21 shown in FIG. 6 and the switching cord 22 having the switching grip 23 attached to one end thereof, the switching bar 24 and the switching pole shown in FIG. 14 are further provided. Instead of providing 26, as shown in FIG. 16, the convolution detection mechanism 50 that automatically detects the convolution of the upper screen 11U and interlocks with the switching operation of the switching unit 65 in the shielding material driving device 60 is the head. It is provided on the back side of the box 1 (see FIG. 19). Therefore, in the pleated screen of the third embodiment, the configuration other than the convolution detection mechanism 50 is the same as that of the pleated screen of the second embodiment, and further details will be omitted. That is, the configuration of the shielding material driving device 60 can be the same as that shown in FIG. 10, except that the compression spring 68, which will be described later, is further provided and the convolution detection mechanism 50 is interlocked.

The details of the convolution detection mechanism 50 will be described later, but as shown in FIG. 17, a movable arm 53 and a movable arm that detect the convolution of the upper screen 11U and slide and move the switching unit 65 in the shielding material driving device 60. As a clutch mechanism for holding the state of 53 by the clutch operation, a trolley 54 that moves up and down in conjunction with the movable arm 53 and a clutch ball 55 described later are used to guide the vertical movement of the trolley 54. It is composed of a front case 51 and a rear case 52 that hold the clutch.

Then, as shown in FIG. 17, when the upper screen 11U is not folded, the dolly 54 can be moved downward from the front case 51 and the rear case 52 and pulled out, and the dolly 54 is lowered. When the movable arm 53 is located at, the switching unit 65 shown in FIG. 19 is slid and moved in one direction, and only the third transmission clutch 63 is set to rotate and transmit (see FIG. 19).

On the other hand, as shown in FIG. 18, when the upper screen 11U is folded, the dolly 54 can be moved upward and pushed into the front case 51 and the rear case 52, and the dolly 54 is upward. When the movable arm 53 is located at, the movable arm 53 slides the switching unit 65 shown in FIG. 19 in the other direction, and only the fourth transmission clutch 634 is set to rotate and transmit.

(Convolution detection mechanism)
Hereinafter, the configuration of the convolution detection mechanism 50, the schematic configuration of the shielding material driving device with the automatic convolution detection, and the operation thereof will be described more specifically. FIG. 20 is a perspective view showing a schematic configuration of a shielding material driving device 60 with automatic folding detection of a pleated screen configured as a shielding device according to a third embodiment of the present invention. Further, FIG. 21 is an exploded perspective view showing a schematic configuration of the convolution detection mechanism 50 together with the switching unit 65 in the shielding material driving device 60.

First, as shown in FIG. 20, the convolution detection mechanism 50 is a movable arm that slides and moves the switching unit 65 in the shielding material driving device 60 in order to interlock with the switching operation of the switching unit 65 in the shielding material driving device 60. The shaft portion 531 of the 53 is rotatably supported by the bearing portion 628 via a through hole 629 provided in the lower case 62 of the shielding material driving device 60 (see FIG. 10).

As shown in FIG. 21, the convolution detection mechanism 50 is composed of a front case 51, a rear case 52, a movable arm 53, a carriage 54, and a clutch ball 55 as a more specific configuration example. The front case 51, the rear case 52, and the carriage 54 are configured as a clutch mechanism that locks or allows (unlocks) the movement of the movable arm 53.

The movable arm 53 engages with a columnar shaft portion 531 and an engaging piece 532 extending in a substantially opposite shape in the circumferential direction from a portion on the peripheral surface of the shaft portion 531 from one end of the shaft portion 531. It has a detection bar 533 that extends in an abbreviated shape in the direction opposite to that of the piece 532, and a columnar working shaft 534 that is substantially parallel to the shaft portion 531 but extends in the opposite direction from the end of the detection bar 533. There is.

The dolly 54 has an elongated hole 541 provided near the lower end of the substantially elongated plate-shaped main body and extending in the left-right direction, and a guide groove 542 having a so-called heart cam structure formed on the front surface above the substantially elongated plate-shaped main body and extending vertically. It has a pair of projecting pieces 543 that project rearward from the left and right edge edges above the substantially elongated plate-shaped main body.

The front case 51 has a fitting recess 511 provided at two upper and lower positions on the outer side of the left and right side walls protruding rearward from the left and right edge edges of the main body having a substantially U-shaped cross section, and the main body having a substantially U-shaped cross section. It has a stepped groove 512 formed at substantially the center of the rear surface, extending to the left and right, and having a more concave center.

The rear case 52 has a fitting claw portion 521 provided at two upper and lower positions on the inside on the left and right side walls protruding forward from the left and right end edges of the main body having a substantially U-shaped cross section, and a substantially U-shaped cross section. It has a pair of slide grooves 522 extending in the vertical direction along the left and right side walls on the front surface of the main body.

By fitting each fitting recess 511 of the front case 51 with each corresponding fitting claw portion 521 of the rear case 52, the pair of protruding pieces 543 of the trolley 54 engages with the pair of slide grooves 522 of the rear case 52. In this state, the dolly 54 is housed in the front case 51 and the rear case 52 so as to be relatively movable up and down.

At this time, the clutch ball 55 is sandwiched between the concave groove 512 of the front case 51 and the guide groove 542 of the so-called heart cam structure of the bogie 54, and is restrained by the concave groove 512 of the so-called heart cam structure guide groove 542. It is movable on.

The operating shaft 534 of the movable arm 53 is engaged and inserted into the elongated hole 541 of the trolley 54, and the operating shaft 534 can be slidably moved on the elongated hole 541 of the trolley 54.

Then, as shown in FIG. 22B as a sectional view taken along the line AA'with respect to the plan view of the folding detection mechanism 50 and the shielding material driving device 60 installed in the headbox 1 shown in FIG. 22A, the folding detection mechanism is used. In order to interlock with the switching operation of the switching unit 65 in the shielding material driving device 60, the shaft portion 531 of the movable arm 53 that slides and moves the switching unit 65 in the shielding material driving device 60 is the lower surface of the head box 1. It is rotatably supported by the bearing portion 628 shown in FIG. 10 through the through hole 1b provided in the above and the through hole 629 provided in the lower case 62 of the shielding material driving device 60. Further, as shown in FIG. 10, a spring support portion 627 is provided in the lower case 62, and a round recess 655 is formed in the center of the bottom of the switching unit 65, and both ends of the compression spring 68 are engaged with each other. There is.

Further, as shown in FIG. 10, a spring support portion 627 is provided in the lower case 62, and a round recess 655 is formed in the center of the bottom of the switching unit 65. As shown, both ends of the compression spring 68 shown in FIG. 21 are engaged and mounted on the spring support portion 627 and the round recess 655. Therefore, the switching unit 65 is always urged to slide and move in the direction of the input shafts 601 and 602 shown in FIG. 20 in the shielding material driving device 60.

Note that FIG. 21 shows a switching unit 65 that is visually recognized from the direction opposite to that of FIG. As shown in FIG. 21, a vertically long engaging groove 658 is formed at a position visible from the side opposite to the round recess 655 provided in the center of the bottom of the switching unit 65. The tip of the engaging piece 532 extending in a substantially opposite shape in the circumferential direction from the shaft portion 531 of the movable arm 53 always abuts on the vertically long engaging groove 658 and is movable on the vertically long engaging groove 658. Engage.

Therefore, when the engaging piece 532 presses the switching unit 65 in a direction that opposes the urging force of the compression spring 68 with the rotation of the shaft portion 531 of the movable arm 53, the switching unit 65 moves in the shielding material driving device 60. It slides in the output shafts 603 and 604 directions (opposite to the input shafts 601 and 602).

By the way, in FIG. 21, a locking hole 658 penetrating from the engaging groove 658 to the round recess 655 and a horizontally long locking groove 657 are shown, and these locking holes 658 and the horizontally long locking groove 657 are shown. Is formed so that it can be commonly used in the second embodiment described above, and in this embodiment, the locking hole 658 and the locking groove 657 may be omitted. That is, the locking hole 658 is for locking one end of the switching cord 22 of the second embodiment described above with a round recess 655 by a knot or the like (see FIG. 11), and the horizontally long locking groove 657 is provided. This is for fixing one end of the switching bar 24 of the modification of the second embodiment described above (see FIG. 15).

The shielding material drive device 60 with automatic convolution detection in the present embodiment is configured to have a convolution detection mechanism 50 having such a structure, and has a movable arm 53 (or the lower end of the carriage 54) in FIGS. 17 and 18. As shown in the above, the presence / absence of convolution of the upper screen 11U is automatically detected, and the screen to be operated by the sliding movement of the switching unit 65 in the shielding material driving device 60 is automatically switched.

23 (a) and 23 (b) show a partially simplified cross-sectional view and a plan view showing the first operation of the shield material driving device 60 with automatic convolution detection according to the present embodiment, respectively. Further, FIGS. 23 (c) and 23 (d) show a partially simplified cross-sectional view and a plan view showing the second operation of the shield material driving device 60 with automatic convolution detection in the present embodiment, respectively.

First, as the first operation of the shielding material driving device 60 with automatic folding detection shown in FIGS. 23 (a) and 23 (b), when the upper screen 11U is not folded, as shown in FIG. 23 (a). The bogie 54 is at the lower limit position as a relative movement range with respect to the front case 51 and the rear case 52, and the clutch ball 55 is located at the upper end of the guide groove 542 of the so-called heart cam structure although it is restrained by the concave groove 512. ing. In this state, the operating shaft 534 of the movable arm 53 is supported by the left end of the elongated hole 541 provided near the lower end of the carriage 54.

At this time, the movable arm 53 is rotatably supported by the shaft portion 531 as a fulcrum, and allows the carriage 54 to move upward relative to the front case 51 and the rear case 52. The switching unit 65 in the above is urged so as to always slide and move in the input shafts 601, 602 directions by the urging force of the compression spring 68, and the tip of the engaging piece 532 of the movable arm 53 is the switching unit in the shielding material drive device 60. Since it is in contact with the engagement groove 658 of 65, the detection bar 533 of the movable arm 53 is stably held in the state shown in FIG. 23 (a) unless an external force is generated.

In the state shown in FIG. 23 (a), as shown in FIG. 23 (b), the switching unit 65 is slid and moved in the input shafts 601 and 602 directions, and is among the third and fourth transmission clutches 63 and 64. Only the fourth transmission clutch 64 can transmit rotation, and only one direction rotation of the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b, respectively, is performed via the output shaft 604. It is transmitted only to the fourth drive shaft 7R.

On the other hand, as the second operation of the shielding material driving device 60 with automatic folding detection shown in FIGS. 23 (c) and 23 (d), when the upper screen 11U is folded, it is movable as shown in FIG. 23 (c). An external force is generated on the arm 53 (or the lower end of the bogie 54), and the bogie 54 moves upward relative to the front case 51 and the rear case 52. Although the clutch ball 55 is restrained by the concave groove 512, the clutch ball 55 is located at the lower end of the guide groove 542 of the so-called heart cam structure and is locked. In this state, the operating shaft 534 of the movable arm 53 is supported by the right end of the elongated hole 541 provided near the lower end of the carriage 54.

At this time, the movable arm 53 is rotatably supported around the shaft portion 531 as a fulcrum, and the tip of the engaging piece 532 of the movable arm 53 abuts on the engaging groove 658 of the switching unit 65 in the shielding material driving device 60. Therefore, the switching unit 65 in the shielding material driving device 60 slides and moves in the output shafts 603 and 604 directions against the urging force of the compression spring 68. Since the carriage 54 is locked to the front case 51 and the rear case 52 as a clutch mechanism, the detection bar 533 of the movable arm 53 is stably held in the state shown in FIG. 23 (d) unless this lock is released.

In the state shown in FIG. 23 (c), as shown in FIG. 23 (d), the switching unit 65 is slid in the output shafts 603 and 604 directions, and is among the third and fourth transmission clutches 63 and 64. Only the third transmission clutch 63 can transmit rotation, and only one-way rotation of the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b, respectively, is performed via the output shaft 603. It is transmitted only to the third drive shaft 7F.

Here, the clutch operation of the front case 51, the rear case 52, and the carriage 54 configured as a clutch mechanism for locking or allowing (unlocking) the movement of the movable arm 53 will be described with reference to FIG. 24. The bogie 54 is movable in the vertical direction relative to the front case 51 and the rear case 52, and a guide groove 542 having a heart cam structure shown in FIG. 24 is formed. The clutch ball 55 can move on the guide groove 542 of the bogie 54 while being restrained by the concave groove 512, and the lock of the relative movement of the bogie 54 with respect to the front case 51 and the rear case 52 depending on the position of the clutch ball 55. And the unlocked state can be switched.

As shown in FIG. 24, the guide groove 542 moves the clutch ball 55 from the first position P1 to the fourth position P4 in the order of the movement of the bogie 54, and the guide groove 542 at any of the positions P1 to P4. 542 holds the clutch ball 55 constrained by the concave groove 512 formed in the front case 51. Therefore, depending on the position of the clutch ball 55, whether or not to lock the bogie 54 with respect to the front case 51 and the rear case 52 is set, whereby the movement of the movable arm 53 linked to the movement of the bogie 54 is locked or allowed ( It is configured as a clutch mechanism to unlock).

When the clutch ball 55 is located at the upper end of the guide groove 542 or at the first position P1 extending linearly from the upper end, the upper screen 11U is folded and movable as described with reference to FIG. If an external force is generated on the arm 53 (or the lower end of the bogie 54), the bogie 54 is in a state of allowing the bogie 54 to move upward relative to the front case 51 and the rear case 52.

When an external force is generated on the movable arm 53 (or the lower end of the bogie 54) from the state where the clutch ball 55 is located at the first position P1, the bogie 54 moves upward relative to the front case 51 and the rear case 52, and the bogie 54 moves upward. Based on the movement, the clutch ball 55 moves from the first position P1 to the second position P2. If the movement at this time is less than the minimum displacement movement amount R shown in FIG. 24 and the external force disappears, the state returns to the state of the first position P1, and if the movement is equal to or more than the minimum displacement movement amount R, the second position P2 to the third position It reaches P3. When the clutch ball 55 reaches the third position P3, the bogie 54 is in the state shown in FIG. 23 (c), and the movement of the movable arm 53 linked to the movement of the bogie 54 is locked.

Then, when the clutch ball 55 is slightly upwardly moved upward with respect to the front case 51 and the rear case 52 due to an external force generated from the state where the clutch ball 55 is located at the third position P3 (this operation is an unlocking operation), at this time. If the movement of the clutch ball 55 moves by the second displacement minimum movement amount T or more shown in FIG. 24, the clutch ball 55 moves from the third position P3 to the fourth position P4 based on the movement. If it is less than the second minimum displacement movement amount T, the position returns to the third position P3.

At the fourth position P4, the bogie 54 is in the unlocked state, and the movement of the movable arm 53 linked to the movement of the bogie 54 is also released, and the bogie 54 moves downward with respect to the front case 51 and the rear case 52. Since the switching unit 65 is in a relative movable state, the switching unit 65 is always urged to slide and move in the input shafts 601, 602 directions by the urging force of the compression spring 68, and the tip of the engaging piece 532 of the movable arm 53 is shielded. Since it is in contact with the engagement groove 658 of the switching unit 65 in the material drive device 60, the detection bar 533 of the movable arm 53 is in the state shown in FIG. 23A and is stably held as long as no external force is generated. ..

Therefore, in the shielding material driving device 60 with automatic folding detection in the present embodiment, the presence or absence of folding of the upper screen 11U is performed on the movable arm 53 (or the lower end of the carriage 54) as shown in FIGS. 17 and 18. Is automatically detected, and the screen to be operated by the sliding movement of the switching unit 65 in the shielding material driving device 60 can be automatically switched.

For example, FIG. 25 (a) briefly shows the overall operation of a pleated screen configured as a shielding device according to a third embodiment of the present invention, and FIGS. 25 (b) and 25 (c) are diagrams, respectively. The operation of the shielding material driving device 60 with the automatic convolution detection corresponding to the whole operation of the pleated screen shown in 25 (a) is shown.

First, the state of the pleated screen shown in FIG. 25 (a-1) shows a state when the intermediate rail 20 and the bottom rail 12 are respectively aligned with the lower limit positions and the upper screen 11U and the lower screen 11L are not folded. ing. At this time, as shown in FIG. 25 (b-1), the bogie 54 is at the lower limit position as a relative movement range with respect to the front case 51 and the rear case 52, and as shown in FIG. 25 (c-1), the shielding material driving device 60. Since the switching unit 65 is in a state of being slid in the input shafts 601, 602 directions by the urging force of the compression spring 68, the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b, respectively. Only rotation in one direction is transmitted to only the fourth drive shaft 7R via the output shaft 604.

Subsequently, when the operation code 14 is pulled from the state of the pleated screen shown in FIG. 25 (a-1) via the first grip 16a or the second grip 16b shown in FIG. 18, a fourth drive is performed. Only the shaft 7R is rotationally transmitted. Therefore, only the second take-up shaft 5R through which the fourth drive shaft 7R is inserted so as not to rotate relative to each other is rotated in the take-up direction of the second elevating cord 19, the intermediate rail 20 rises, and the upper screen 11U Only is folded into the state of the pleated screen shown in FIG. 25 (a-2). At this time, as shown in FIG. 25 (b-2), the bogie 54 reaches the upper limit position as a relative movement range with respect to the front case 51 and the rear case 52, and then slightly lowers to be locked as the clutch mechanism thereof. .. As shown in FIG. 25 (c-2), the switching unit 65 in the shielding material driving device 60 resists the urging force of the compression spring 68 by the action of the movable arm 53 interlocked with the movement of the trolley 54, and the output shaft 6033. It switches to the state of sliding in the 604 direction, and drives only the rotation of the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b in one direction via the output shaft 603, respectively. It is in a state of transmitting only to the shaft 7F.

Subsequently, when the operation code 14 is pulled from the state of the pleated screen shown in FIG. 25 (a-2) via the first grip 16a or the second grip 16b shown in FIG. 18, the first and first grips are pulled. Since only the rotation of the intermediate gears 66a and 66b connected to the drive shafts 7a and 7b of 2 in one direction is transmitted to only the third drive shaft 7F via the output shaft 603, the third drive shaft 7F is switched to. Only the drive shaft 7F of the above is rotationally transmitted. Therefore, only the first take-up shaft 5F through which the third drive shaft 7F is inserted so as not to rotate relative to each other is rotated in the take-up direction of the first elevating cord 18, the bottom rail 12 rises, and the lower screen 11L Is also folded into the state of the pleated screen shown in FIG. 25 (a-3). At this time, as shown in FIG. 25 (b-3), the bogie 54 is in a locked state as its clutch mechanism in the vicinity of the upper limit position as a relative movement range with respect to the front case 51 and the rear case 52, and is in a locked state in FIG. 25 (c-). As shown in 3), the switching unit 65 in the shielding material driving device 60 is in a state of being switched to a state of sliding and moving in the output shafts 603 and 604 directions against the urging force of the compression spring 68. In the state shown in b-3), the lock can be released by a slight pulling operation of the operation code 14.

Subsequently, from the state of the pleated screen shown in FIG. 25 (a-3), the lock of the carriage 54 is released by a slight pulling operation of the operation code 14, and the first grip 16a or the second grip shown in FIG. 18 is released. When a slight pulling operation of the operation code 14 is performed via 16b, the lock of the stopper device 8F shown in FIG. 19 is released by the pulling operation of the operation code 14, the bottom rail 12 is lowered to the lower limit position by its own weight, and FIG. 25 The state of the pleated screen shown in (a-4) is reached. At this time, although the lower screen 11L is in the folded state, the locks for the front case 51 and the rear case 52 of the bogie 54 are released, so that the compression spring is as shown in FIG. 25 (c-4). The switching unit 65 slides in the input shafts 601, 602 directions due to the urging force of 68, and as a result, the bogie 54 has a lower limit as a relative movement range with respect to the front case 51 and the rear case 52 as shown in FIG. 25 (b-4). Move to the position. Therefore, even when the lower screen 11L is in the folded state, the switching unit 65 in the shielding material driving device 60 slides in the input shafts 601 and 602 directions by the urging force of the compression spring 68 by unlocking the trolley 54. Then, only the rotation of the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b in one direction is transmitted to only the fourth drive shaft 7R via the output shaft 604. ..

Subsequently, when the operation code 14 is slightly pulled from the state of the pleated screen shown in FIG. 25 (a-4), the stopper device 8R shown in FIG. 19 is unlocked and the intermediate rail 20 reaches the lower limit position. It descends by its own weight and becomes the state of the pleated screen shown in FIG. 25 (a-5). At this time, as shown in FIG. 25 (b-4), the bogie 54 is at the lower limit position as a relative movement range with respect to the front case 51 and the rear case 52, and as shown in FIG. 25 (c-4), the shielding material driving device 60. Since the switching unit 65 in the above-mentioned state is in a state of being slid in the input shafts 601 and 602 directions by the urging force of the compression spring 68, the above-mentioned FIGS. 25 (a-1), (b-1) and (c-1) are shown. As shown, a state in which only one-way rotation of the intermediate gears 66a and 66b connected to the first and second drive shafts 7a and 7b, respectively, is transmitted to only the fourth drive shaft 7R via the output shaft 604. Return to.

As described above, in the pleated screen of the third embodiment, the folding of the upper screen 11U can be automatically detected and the screen to be operated can be automatically switched. Although the example of directly engaging the compression spring 68 with the switching unit 65 has been described in the example of the present embodiment, the urging force of the compression spring 68 may be provided on the convolution detection mechanism 50 side.

Therefore, according to the pleated screen of the present embodiment, even in the form of having a plurality of screens at the top and bottom, the screen to be operated is automatically switched, and any of the operation codes 14 to be hung back and forth can be obtained. Even if it is operated, the same lifting operation is performed, so the operation can be understood at first glance and the operability is improved. Further, according to the pleated screen of the present embodiment, since the operation code 14 is not configured endlessly, the safety can be further enhanced.

In particular, according to the pleated screen of the present embodiment, the configuration of the operating device 3 can be shared with the operating device 3 of the pleated screens of the first and second embodiments, which contributes to cost reduction. ..

[Fourth Embodiment]
(overall structure)
FIG. 26 is a side view showing a schematic configuration of a pleated screen configured as a shielding device according to a fourth embodiment of the present invention. FIG. 27 is a plan view showing a schematic configuration of a pleated screen configured as a shielding device according to a fourth embodiment of the present invention. The pleated screen configured as the shielding device of the fourth embodiment is a modification of the pleated screen of the second embodiment shown in FIGS. 6 and 7 described above, and has the same components as those of the second embodiment. It has the same reference number.

The pleated screen of the fourth embodiment shown in FIGS. 27 and 28 is a manual switching operation for selecting a screen to be operated by the switching code 22 (or the switching pole 26), and has an upper screen 11U and a lower screen 11L, and the operation thereof. It is the same as the second embodiment in that the same ascending / descending operation is performed regardless of which operation code 14 is hung from the front and back of the target screen. However, unlike the second embodiment shown in FIGS. 6 and 7 described above, in the pleated screen of the fourth embodiment, the endless operation code 14 is used, and the first clutch gear 40a, the first transmission clutch 41a, and the like. The difference is that the first drive shaft 7a is not required.

Therefore, in the pleated screen of the fourth embodiment, the configuration other than the point that the operation code 14 is endless and the first clutch gear 40a, the first transmission clutch 41a, and the first drive shaft 7a are unnecessary is used. It is the same as the pleated screen of the second embodiment, and further details will be omitted.

In the pleated screen of the fourth embodiment, when an excessive load exceeding the tensile force acting during normal operation is applied to the endless operation code 14, the pleated screen is separated by the tensile force of the resident. A connecting portion 14a having a safety function for ensuring safety is provided.

In the pleated screen of the fourth embodiment, when the upper screen 11U is moved up and down, as shown in FIG. 28A, the switching cord 22 is pulled out and the switching unit 65 is slid to the right in the figure in the shielding material driving device 60. It is moved, and the movement of the switching cord 22 is locked by the operation of the stopper device 21 shown in FIG. 27, and only the fourth transmission clutch 64 is set to be rotationally transmitted. Then, when the operation code 14 suspended on the front side is pulled as shown in FIG. 28 (b), the second drive shaft 7b rotates in the direction shown in FIG. 28 (a), and the shielding material is shielded. Rotationally transmitted to the fourth drive shaft 7R via the drive device 60, the elevating cord 19 is wound around the second take-up shaft 5R, and the intermediate rail 20 is pulled up. Then, when the operation code 14 is released after the intermediate rail 20 is pulled up to a desired height, the stopper device 8R is locked by the self-weight drop prevention operation, and the intermediate rail 20 is held at the desired height. Further, when the stopper device 8R is unlocked by a slight pulling operation of the operation code 14, the fourth drive shaft 7R and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, with respect to the operation pulley 13. The intermediate rail 20 spins idle and the rotation is not transmitted, and the intermediate rail 20 descends to the lower limit position by its own weight.

On the other hand, when the lower screen 11L is moved up and down, as shown in FIG. 28 (c), the switching cord 22 is slightly pulled out to release the operation of the stopper device 21 and allow the switching cord 22 to move to drive the lock shielding material. The switching unit 65 is slid to the left in the drawing in the device 60, and only the third transmission clutch 63 is set to rotate and transmit. Then, when the operation code 14 suspended on the front side is pulled as shown in FIG. 28 (d), the second drive shaft 7b rotates in the direction shown in FIG. 28 (c), and the shielding material is shielded. The rotation is transmitted to the third drive shaft 7F via the drive device 60, the elevating cord 18 is wound around the first take-up shaft 5F, and the bottom rail 12 is pulled up. Then, when the operation code 14 is released after the bottom rail 12 is pulled up to a desired height, the stopper device 8F is locked by the self-weight descent prevention operation, and the bottom rail 12 is held at the desired height. Further, when the stopper device 8F is unlocked by a slight pulling operation of the operation code 14, the third drive shaft 7F and the second drive shaft 7b rotate in the direction opposite to the direction shown in the drawing, with respect to the operation pulley 13. The bottom rail 12 spins idly and the bottom rail 12 descends to the lower limit position without being transmitted.

Therefore, according to the pleated screen of the present embodiment, even in the form of having a plurality of screens at the top and bottom, two screens to be operated are hung back and forth by selecting the screen to be operated by the pulling operation of the switching code 22. Only the operation code 14 on the front side needs to be operated, and the operation can be understood at first glance to improve the operability. Further, according to the pleated screen of the present embodiment, although the operation code 14 is configured to be endless, a certain level of safety can be maintained because the connecting portion 14a that separates when an excessive load is generated is provided. ..

In particular, according to the pleated screen of the present embodiment, the configuration of the operating device 3 can be shared with the members of the operating device 3 in the pleated screens of the first to third embodiments, which contributes to cost reduction. Will be.

As a modification of the fourth embodiment, instead of providing the stopper device 21 and the switching cord 22 to which the switching grip 23 is attached at one end as in the pleated screen of the modification of the second embodiment shown in FIG. , The switching bar 24 and the switching pole 26 can be provided, and almost the same effect can be obtained.

Further, as a modification of the fourth embodiment, as in the pleated screen of the third embodiment shown in FIG. 16, instead of the manual switching operation by the switching code 22 or the switching pole 26, the convolution detection mechanism 50 is provided. The effect of the pleated screen of the third embodiment can be obtained.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and can be variously modified without departing from the technical idea. For example, an example of applying the shielding material driving devices 6 and 60 according to the present invention to a pleated screen has been described. However, a shielding material such as a screen, slats, and curtains is suspended and supported from a head box, and the shielding material is raised and lowered. It can also be used for applications such as pleated screens, horizontal blinds, raised curtains, and curtain rails that allow the amount of lighting to be adjusted. Further, in the example of the above-described embodiment, the operation pulley 13 has been mainly described as an example of the operation source for rotating the drive shaft, but as a modification thereof, the output shaft of the electric motor operated by the control signal may be used. can. Further, in the example of each of the above-described embodiments, the switching cord 22, the switching pole 26, or the convolution detection mechanism 50 is used to use any one of the plurality of output shafts in the shielding material driving device 60 to control each of the plurality of shielding materials. An example of selective switching so as to transmit to one drive shaft to be driven has been described, but as a modification thereof, a control device for switching control based on an external operation is provided when the output shaft of the electric motor is used as an operation source. It can be configured.

According to the present invention, when the shielding device is configured, cost and operability can be improved, and more preferably safety can be enhanced. Therefore, pleated screens, horizontal blinds, raised curtains, curtain rods, etc. It is useful for shielding device applications.

1 Headbox 2 Bracket 3 Operating device 4 Clutch mechanism 5 Winding shaft 5F 1st winding shaft 5R 2nd winding shaft 6,60 Shielding material drive device 6a, 6b Intermediate gear 7a 1st drive shaft 7b 2nd Drive shaft 7F 3rd drive shaft 7R 4th drive shaft 8, 8F, 8R Stopper device 9, 9F, 9R Governor device 10, 10F, 10R Lower limit limit device 11 screen 11U Upper screen 11L Lower screen 12 Bottom rail 13 Operation Pulley 14 Operation code 15a 1st limiting member 15b 2nd limiting member 16a 1st grip 16b 2nd grip 17 Pitch holding code 18 1st elevating code 19 2nd elevating code 21 Stopper device 22 Switching code 23 Switching Grip 24 Switching bar 25 Switching box 26 Switching pole 50 Folding detection mechanism 51 Folding detection mechanism front case 52 Folding detection mechanism rear case 53 Movable arm 54 Carriage 55 Clutch ball 61 Shielding material drive upper case 62 Shielding material drive device Lower case 63 Third transmission clutch 64 Fourth transmission clutch 65 Switching unit 66a Intermediate gear 66b Intermediate gear 67,68 Compression spring 601 Shielding material drive input shaft 602 Shielding material drive input shaft 603 Shielding material drive unit Output shaft 604 Output shaft of shield material drive device

Claims (3)

A shielding device that can open and close one shielding material.
An operating source with a rotating shaft that rotates in both directions,
With a clutch mechanism that inputs the rotation of the rotary shaft and transmits one of the bidirectional rotations of the rotary shaft to the first clutch output shaft and the other rotation to the second clutch output shaft. ,
Rotation of a plurality of input shafts including a first input shaft that rotates by one of the rotations of the first clutch output shaft and a second input shaft that rotates by the other rotation of the second clutch output shaft. Is converted into rotation in one direction and transmitted to one drive shaft for opening and closing the one shield material, and a shield material drive device.
A cloaking device characterized by being provided with. The shielding material driving device is
The first intermediate gear that rotates with the rotation of the first input shaft,
A second intermediate gear that rotates with the rotation of the second input shaft is provided.
The gear mechanism has a gear mechanism in which the first intermediate gear and the second intermediate gear are meshed with each other, and the gear mechanism converts bidirectional rotation of the operation source into unidirectional rotation via the clutch mechanism. The shielding device according to claim 1, wherein the shielding device is configured to be converted and transmitted to the drive shaft. The operation source consists of an operation pulley on which an operation code is mounted.
The shielding device according to claim 1 or 2, wherein the operation cord comprises an end-shaped cord that is hooked on the operation pulley and is hung in the front-rear direction.

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