JP6313508B2 - Shielding device - Google Patents

Description

  The present invention relates to a shielding material driving device for opening and closing a shielding material, and a shielding device including the shielding material driving device. Shielding devices can be opened and closed vertically such as pleated screens, horizontal blinds, raised curtains, and roll screens, and can be opened and closed horizontally such as vertical blinds, curtains attached to curtain rails, and partitions. Things.

  In the solar radiation shielding device, an endless operation cord is hung on an operation pulley rotatably supported at one end of the head box, and the operation pulley is operated to rotate the operation pulley, thereby shielding the solar radiation. There is a thing which raises / lowers a material (patent document 1). When such an endless operation cord is suspended from the operation pulley, the endless edge of the operation cord may be caught by a resident moving in the room or other moving objects.

  Therefore, the endless operation cord has a fail-safe function that ensures the safety of the occupant by being separated by the tensile force when an excessive tensile force that exceeds the tensile force that acts during normal operation is applied. Some have a connecting portion (Patent Document 2).

JP 2004-16422 A JP 2011-6929 A

  Although the safety of the technique of Patent Document 2 is secured at a high level, there is a demand for further improving safety.

  This invention is made | formed in view of such a situation, and provides the shielding material drive device excellent in safety | security, operativity, and operation efficiency.

  According to the present invention, there is provided a shielding material driving apparatus that opens and closes a shielding material by rotation of a drive shaft, wherein an operation side rotating body capable of bidirectional input rotation and bidirectional input rotation of the operation side rotating body are provided. A shielding material driving device is provided that includes a rotation transmission unit that outputs to the drive shaft as rotation in only one direction.

  As a result of diligent research to further improve the safety of the solar shading device, the present inventors converted bidirectional rotation applied to the operation pulley into one-way rotation and transmitted it to the drive shaft. When the conversion mechanism is provided, it is noticed that the sunshade can be raised by rotating the drive shaft in one direction by reciprocating the first part and the second part of the operation cord suspended from the operation pulley. . If such a mechanism is used, it is not necessary to make the operation cord endless, so that safety can be improved. In addition, since the reciprocating motion of the first portion and the second portion of the operation cord can be directly converted into one-way rotation of the drive shaft, it is excellent in operability and operation efficiency.

  The inventors of the present invention have the same effect in various devices that can employ a mechanism that outputs a bidirectional input rotation of the operation side rotating body as a rotation in only one direction to the drive shaft. As a result, the present invention has been completed.

Hereinafter, various embodiments of the present invention will be exemplified. The following embodiments can be combined with each other.
Preferably, the rotation transmitting unit includes an input shaft rotated by the input rotation, a first input gear attached to the input shaft via a one-way clutch that transmits only rotation in the first direction, A second input gear attached to the input shaft via a one-way clutch that transmits only rotation in a second direction opposite to the first direction, and rotation of the first and second input gears to the drive shaft. A transmission gear for converting to rotation in the rotation direction.
Preferably, the first and second input gears are bevel gears whose directions of spiral shapes are opposite to each other, and the transmission gear is a first bevel gear that meshes with the first input gear, and a first bevel gear. A first spur gear that rotates with the rotation of the second spur gear, a second spur gear that meshes with the second input gear, a second spur gear that rotates with the rotation of the second spur gear, and the first and second spur gears. An output spur gear meshing with the gear is provided.
Preferably, the first and second input gears are spur gears, and the transmission gear includes a first spur gear that meshes with the first input gear, and a first bevel gear that rotates as the first spur gear rotates. A second spur gear that meshes with the second input gear, a second bevel gear that rotates as the second spur gear rotates, and an output bevel gear that meshes with the first and second bevel gears.
Preferably, including the shielding material driving device, wherein the operation-side rotating body is an operation pulley, and includes an operation cord hung on the operation pulley, and a first portion of the operation cord suspended from the operation pulley And the second part are reciprocated to rotate the drive shaft in one direction.

It is a front view of the pleat screen of a 1st embodiment of the present invention. It is a right view of the pleat screen of FIG. (A)-(b) is the front view corresponding to FIG. 1 for demonstrating the usage method of the operation code | cord | chord 13 (illustration of the screen 4 is abbreviate | omitting). 4 is a perspective view showing a configuration of an operation unit unit 23. FIG. It is a perspective view which shows the state which removed the pulley support 34 from the state of FIG. It is a perspective view which shows the state which removed the operation pulley 11 and the operation cord 13 from the state of FIG. It is a perspective view which shows the state which removed the side case 37 and the side cap 35 from the state of FIG. FIG. 6 is a perspective view showing a state in which a clutch case 31, a gear case 32, a side case 37, and a side cap 35 are removed from the state of FIG. It is a perspective view which shows the state which removed the operation pulley 11 and the operation cord 13 from the state of FIG. FIG. 10 is a perspective view showing a state in which the transmission clutch 21 and the drive shaft 12 are removed from the state of FIG. 9. 5 is a perspective view for explaining a method of attaching the conversion gear 33 to the gear case 32. FIG. It is the perspective view which looked at the conversion gearwheel 33 of FIG. 10 from another angle. It is sectional drawing which shows the structure of a stopper apparatus. It is an expanded view which shows the stopper guide groove of a stopper apparatus. It is a perspective view which shows the structure of the operation part unit 23 in 2nd Embodiment of this invention. It is a perspective view which shows the state which removed the pulley support 34 from the state of FIG. It is a perspective view which shows the state which removed the 1st gear case 63 from the state of FIG. It is a perspective view which shows the state which removed the 2nd gear case 64 from the state of FIG. It is a perspective view which shows the state which removed the 1st and 2nd gear case 63, 64 from the state of FIG. FIG. 20 is a perspective view showing a state where the operation cord 13 is removed from the state of FIG. 19. It is the perspective view which looked at the state of Drawing 20 from another angle. It is a one part perspective view of the conversion gearwheel 2 of FIG.

  Hereinafter, embodiments of the present invention will be described. Various characteristic items shown in the following embodiments can be combined with each other. The invention is established independently for each feature. In the following description, the pleated screen can be appropriately read as “shielding device”.

1. First Embodiment A pleated screen according to a first embodiment of the present invention shown in FIGS. 1 to 2 has a screen 4 suspended from a head box 1 and a bottom rail 5 attached to the lower end of the screen 4. The screen 4 enables the fabric to be folded in a zigzag shape.

  Between the head box 1 and the bottom rail 5, a pitch holding cord 39 for holding the pitch of the folds of the screen 4 is provided. The pitch holding cord 39 is provided with a large number of annular holding portions 57 at equal intervals. After the holding portions 57 are inserted into the screen 4, the lifting cord 7 for raising and lowering the bottom rail 5 is held by the holding portion 57. The holding portion 57 is prevented from coming off from the screen 4 by being inserted into the screen 4, thereby enabling the pitch of the screen 4 to be held. The pitch holding cord 39 and the lifting / lowering cord 7 are arranged on opposite sides of the screen 4.

  A pitch holding cord holding member 56 that holds the pitch holding cord 39 and a lifting / lowering cord holding member 55 that holds the lifting / lowering cord 7 are attached to the bottom rail 5. The pitch holding cord 39 and the lifting / lowering cord 7 are attached to the bottom rail 5 by these holding members.

  The upper end of the lifting / lowering cord 7 is attached to the winding shaft 10. The winding shaft 10 rotates together with the drive shaft 12. At one end of the head box 1, an operation unit unit 23 including an operation cord 13, an operation pulley 11, and a transmission clutch 21 is provided. The operation cord 13 is hung on the operation pulley 11, and locking members 14 a and 14 b that prevent the operation cord 13 from coming off the operation pulley 11 are provided at both ends of the operation cord 13. The locking members 14a and 14b also have an effect of facilitating operation of the operation code 13 by gripping the operation code 13. The operation cord 13 may be endless (looped), but is preferably ended as in this embodiment in order to increase safety.

  As shown in FIG. 10, the transmission clutch 21 includes an input unit 21a on the operation pulley 11 side and an output unit 21b on the drive shaft 12 side, and the rotation applied to the input unit 21a is transmitted to the output unit 21b. However, the rotation applied to the output unit 21b is configured not to be transmitted to the input unit 21a. The output portion 21 b of the transmission clutch 21 is a shaft having a non-circular cross section, and is inserted into a fitting hole 22 a having a non-circular cross section provided in the connecting portion 22 so that the output portion 21 b rotates integrally with the connecting portion 22. Since the drive shaft 12 is integrated with the connecting portion 22, it rotates integrally with the connecting portion 22. The input portion 21a of the transmission clutch 21 is a fitting hole having a non-circular cross section, and the rotation of the output shaft 33f is input to the transmission clutch 21 by inserting an output shaft 33f having a non-circular cross section of the conversion gear 33 described later. Is done.

  As shown in FIG. 10, the conversion gear 33 converts both the rotation in the arrow Q direction and the arrow P direction input to the input shaft 33a into the rotation in the arrow A direction of the output shaft 33f. That is, the output shaft 33f rotates in the direction of arrow A regardless of which direction the input shaft 33a is rotated.

  Hereinafter, the details of the conversion gear 33 will be described. As shown in FIG. 10, inclined gears 33b and 33c are attached to the input shaft 33a via a not-shown one-way clutch. By the action of the one-way clutch, only the rotation in the arrow P direction is transmitted to the inclined gear 33b, and only the rotation in the arrow Q direction is transmitted to the inclined gear 33c. Accordingly, when the input shaft 33a is rotated in the direction of arrow P, only the inclined gear 33b rotates in the direction of arrow P, and the inclined gear 33c rotates idly. On the other hand, when the input shaft 33a is rotated in the arrow Q direction, only the inclined gear 33c rotates in the arrow Q direction, and the inclined gear 33b idles.

  An inclined gear 33d is engaged with the inclined gear 33b. When the inclined gear 33b rotates in the direction of arrow P, the inclined gear 33d rotates in the direction of arrow B accordingly, and is integrated with the inclined gear 33d. The formed spur gear 33g also rotates in the arrow B direction.

  The inclined gear 33e is engaged with the inclined gear 33c. When the inclined gear 33c rotates in the direction of the arrow Q, the inclined gear 33e rotates in the direction of the arrow B accordingly, and is integrated with the inclined gear 33e. The formed spur gear 33h also rotates in the arrow B direction.

  Thus, since the direction of the helical shape of the inclined gear 33b and the inclined gear 33d that meshes with the inclined gear 33b is opposite to that of the inclined gear 33c and the inclined gear 33e that meshes with this, the inclined gear 33b. Although the rotation direction of the gear and the inclined gear 33c are opposite to each other, the inclined gear 33d and the inclined gear 33e both rotate in the direction of the arrow B. With this rotation, the spur gear 33g Both the spur gear 33h and the spur gear 33h rotate in the arrow B direction.

  When the spur gear 33g rotates in the arrow B direction, the spur gear 33k that meshes with the spur gear 33g rotates in the arrow A direction. Since the output shaft 33f is formed integrally with the spur gear 33k, the output shaft 33f also rotates in the arrow A direction. The rotation of the output shaft 33 f is input to the input portion 21 a of the transmission clutch 21.

  By the way, since the spur gear 33k is also meshed with the spur gear 33h, when the spur gear 33k rotates in the direction of arrow A, the spur gear 33h rotates in the direction of arrow B. With this rotation, the helical gear 33e also rotates. It rotates in the direction of arrow B.

  When the bevel gear 33e rotates in the arrow B direction, the bevel gear 33c rotates in the arrow Q direction. Since the bevel gear 33c is attached to the input shaft 33a via a one-way clutch that transmits only the rotation of the input shaft 33a in the direction of arrow Q, the rotation of the bevel gear 33c in the direction of arrow Q is the same as that of the input shaft 33a. Is not communicated to. This is because the rotation of the inclined gear 33c in the arrow Q direction has the same relative rotation direction as the rotation of the input shaft 33a in the arrow P direction. Therefore, the rotation of the spur gear 33k is not hindered by the spur gear 33h.

Even when the spur gear 33h rotates in the arrow B direction, the spur gear 33k meshing with the spur gear 33h rotates in the arrow A direction. This rotation causes the spur gear 33g to rotate in the direction of arrow B, and this rotation is transmitted to the inclined gear 33b via the inclined gear 33d, causing the inclined gear 33b to rotate in the direction of arrow P. Since the bevel gear 33b is attached to the input shaft 33a via a one-way clutch that transmits only the rotation of the input shaft 33a in the direction of arrow P, the rotation of the bevel gear 33b in the direction of arrow P is caused by the input shaft 33a. Is not communicated to. Accordingly, the rotation of the spur gear 33k is not hindered by the spur gear 33g.
As described above, the output shaft 33f rotates in the direction of arrow A regardless of whether the input shaft 33a is rotated in the direction of arrow Q or arrow P. When the direction of rotation transmitted by the one-way clutch is reversed, the rotation direction of the output shaft 33f is also reversed.

  As shown in FIG. 11, the gear case 32 is provided with support shafts 32a and 32b, and the support shafts 32a and 32b are inserted into support holes 33i and 33j provided in the spur gears 33g and 33h. 33g and 33h rotate around the support shafts 32a and 32b. The gear case 32 is also provided with an insertion hole 32c, and the output shaft 33f is inserted into the input portion 21a of the transmission clutch 21 through the insertion hole 32c. The transmission clutch 21 is also fixed to the gear case 32.

  As shown in FIGS. 8 to 9, the input shaft 33 a is inserted into the engagement hole 11 e of the operation pulley 11. The input shaft 33a and the engagement hole 11e are both non-circular in cross section, and the operation pulley 11 and the input shaft 33a rotate integrally. An operation cord 13 is hung on the operation pulley 11. The operation code 13 is obtained by arranging a large number of balls 13d at equal intervals on the code 13c. The ball 14d is engaged with an uneven portion 11d provided on the outer periphery of the operation pulley 11, and the tension applied to the operation cord 13 when the first portion 13a or the second portion 13b of the operation cord 13 is pulled down is applied to the operation pulley. 11 rotational force. The operation cord 13 may not have the ball 14d. In this case, the tension applied to the operation cord 13 by the frictional force between the operation cord 13 and the operation pulley is converted into the rotational force of the operation pulley 11. Is done. When the first portion 13a of the operation cord 13 is pulled down, the input shaft 33a rotates in the direction of arrow Q, and when the second portion 13b of the operation cord 13 is pulled down, the input shaft 33a rotates in the direction of arrow P. The shaft 33f rotates in the arrow A direction.

  FIG. 7 shows a state where the conversion gear 33 and the transmission clutch 21 are attached to the gear case 32 and the clutch case 31 is attached so as to cover the transmission clutch 21 from the state of FIG. The clutch case 31 includes a base 31 a on the gear case 32 side and a protrusion 31 b that is narrower than the base 31 a and extends in the longitudinal direction of the head box 1. The protruding portion 31b is formed in a shape that can be engaged with the head box 1 from the end surface in the width direction of the head box 1 having a U-shaped cross section having an opening on the upper surface.

  FIG. 4 to FIG. 6 show a state in which the side case 37 covering the exposed portion of the conversion gear 33 and the side cap 35 covering the side surface of the side case 37 are attached from the state of FIG. The gear case 32 and the side case 37 include pulley support attachment portions 32 a and 37 a for attaching a pulley support 34 that supports the operation pulley 11. The pulley support 34 includes a base 34a, a support wall 34b suspended from the base 34a, and a support cylinder 34c protruding from the support wall 34b toward the head box 1 side. The operation pulley 11 includes a circular support hole 11b into which the support cylinder 34c is inserted. By attaching the base 34a to the pulley support attachment portions 32a and 37a with the support cylinder 34c inserted into the support hole 11b, the operation pulley 11 can be rotated while being supported by the support cylinder 34c.

Next, how to use the operation code 13 will be described.
When the first portion 13a of the operation cord 13 suspended from the operation pulley 11 is pulled down from the state of FIG. 1, the operation pulley 11 rotates in the arrow P direction as shown in FIG. This rotation is converted into rotation in the direction of arrow A by the conversion gear 33, and the drive shaft 12 is rotated in the direction of arrow A via the transmission clutch 21. When the first portion 13a of the operation cord 13 is pulled down, the second portion 13b of the operation cord 13 is raised correspondingly, and the state shown in FIG. Next, when the second portion 13b of the operation cord 13 is pulled down from the state shown in FIG. 3A, the operation pulley 11 rotates in the arrow Q direction. Since the conversion gear in the operation unit 23 is configured to convert the rotation in the direction of the arrow Q to the rotation in the direction of the arrow A, the drive shaft 12 can move in the direction of the arrow A even when the second portion 13b is pulled down. Rotate to. When the second portion 13b of the operation cord 13 is pulled down, the first portion 13a of the operation cord 13 is raised by that amount, and the state shown in FIG. Next, when the first portion 13a of the operation cord 13 is pulled down from the state of FIG. 3B, the drive shaft 12 rotates in the direction of arrow A by the same action, and the operation cord 13 is in the state of FIG. become. As described above, even when the first portion 13a or the second portion 13b of the operation cord 13 is pulled down (that is, when the operation pulley 11 is rotated in the direction of the arrow P or the arrow Q), the drive shaft 12 rotates in the direction of arrow A. Therefore, the drive shaft 12 can be rotated in the same direction (arrow A direction) by repeating the operation of alternately pulling down the first portion 13a and the second portion 13b of the operation code 13. In the present embodiment, the arrow A direction is a direction in which the bottom rail 5 is raised by winding the lifting / lowering cord 7 around the winding shaft 10, and therefore the first portion 13 a and the second portion 13 b of the operation cord 13 are alternately arranged. The bottom rail 5 can be raised by repeating the pulling-down operation.

  The drive shaft 12 is inserted through the stopper device 24 at the intermediate portion of the head box 1. The stopper device 24 stops the rotation of the drive shaft 12 and prevents the bottom rail 5 from dropping its own weight when the operation cord 13 is released after the bottom rail 5 is lifted.

  Here, in FIG. 13 to FIG. 14, in the present embodiment, the stopper device 24 is a rotary heart cam stopper, and the operation thereof will be described below.

  As shown in FIG. 13, the stopper device 24 includes a stopper drum 94, a stopper case 95 disposed around the stopper drum 94, and a stopper ball 96 disposed therebetween. A stopper guide groove 98 having an outer peripheral surface shape and a semicircular cross section shown in FIG. 14 is provided on the outer peripheral surface of the stopper drum 94. A slide groove 97 extending in the direction along the drive shaft 12 and having a semicircular cross section is provided on the inner peripheral surface of the stopper case 95. The stopper ball 96 is disposed between the stopper guide groove 98 and the slide groove 97. Accordingly, the stopper ball 96 can move only in the direction along the drive shaft 12, and when the stopper drum 94 is rotated, the stopper ball 96 moves on the outer peripheral surface of the stopper drum 94 along the stopper guide groove 98. It moves along the slide groove 97 while circling relatively.

  The structure of the stopper guide groove 98 will be described with reference to a development view shown in FIG. In FIG. 14, when the stopper drum 94 is rotated in the lifting direction of the bottom rail 5 (in the direction of arrow A in FIG. 1), the stopper ball 96 moves relatively in the direction of arrow C in FIG. .

  When the stopper drum 94 is rotated in the direction in which the screen 4 is pulled down, the stopper ball 96 moves relatively in the direction of arrow D on the stopper guide groove 98.

  A pull-down groove 99 is formed on one side of the outer peripheral surface of the stopper drum 94. A first return groove 50 that branches in the direction of arrow C communicates with the pull-down groove 99, and the first return groove 50 joins the pull-up groove 51 in the direction of arrow C.

  The pulling groove 51 communicates with a stop groove 52 that branches in the direction of arrow D. The stop groove 52 stops at a locking portion 53 in the direction of arrow D, and passes through a second return groove 54 that extends in the direction of arrow C. It joins the pull-down groove 99.

  In the stopper device 24 configured as described above, when the drive shaft 12 is rotated in the pulling direction of the screen 4 via the transmission clutch 21 based on the operation of the operation cord 13, the stopper ball 96 moves in the pulling groove 51. Move in the direction of arrow C.

  When the operation cord 13 is released after the screen 4 is pulled up to a desired position, the lifting / lowering cord 7 is rewound by the weight of the screen 4, the stopper drum 94 is rotated via the drive shaft 12, and the stopper ball 96 is pulled up. It moves in the direction of arrow D in the groove 51.

  Then, the stopper ball 96 engages with the locking portion 53, and further rotation of the stopper drum 94 is prevented. Therefore, in this state, the weight drop of the screen 4 is prevented.

  Next, when the screen 4 is lowered, if the operation cord 13 is operated to slightly lift the screen 4, the stopper ball 96 is moved from the locking portion 53 through the second return groove 54 into the lowering groove 99. Guided.

  Then, the stopper ball 96 can circulate in the direction of the arrow D in the pull-down groove 99. Therefore, if the operation code 13 is released, the lowering operation by the weight of the screen 4 can be performed.

  Further, when the screen 4 is further lifted from the state where the stopper ball 96 is engaged with the locking portion 53, the operation cord 13 is operated in the pulling direction of the screen 4.

  Then, the stopper ball 96 is guided from the locking portion 53 through the second return groove 54 into the pull-down groove 99, and further guided through the first return groove 50 into the pull-up groove 51. Accordingly, the screen 4 can be pulled up by the operation code 13.

  As shown in FIG. 1, the drive shaft 12 is inserted through the governor device 36 on the side of the stopper device 24. The governor device 36 suppresses the rotational speed of the drive shaft 12 to a predetermined value or less without stopping the rotation of the drive shaft 12, and suppresses the descending speed when the weight of the bottom rail 5 is lowered to a predetermined speed or less.

Here, the operation of the pleated screen will be described.
When the operation of alternately pulling down the first portion 13a and the second portion 13b of the operation cord 13 is repeated, the operation pulley 11 rotates alternately in the arrow P direction and the arrow Q direction in FIG. Both the rotation of the operation pulley 11 in the direction of the arrow P and the direction of the arrow Q is converted into the rotation in the direction of the arrow A in FIG. Rotate in direction A.

  The rotation applied to the input portion 21 a of the transmission clutch 21 is transmitted to the output portion 21 b of the transmission clutch 21, so that the output portion 21 b is rotated in the direction of arrow A, and the rotation is transmitted to the drive shaft 12 via the connecting portion 22. As a result, the drive shaft 12 is rotated. By the rotation of the drive shaft 12, the winding shaft 10 rotatably supported by the support member 8 in the head box 1 rotates in the direction of arrow A in FIG. 1, and the lifting / lowering cord 7 is spirally wound, The bottom rail 5 attached to the tip of the lifting / lowering cord 7 rises.

  If the hand is released from the operation cord 13 in this state, the stopper device 24 is activated to prevent the bottom rail 5 from dropping its own weight. In this state, when the first portion 13a or the second portion 13b of the operation cord 13 is slightly lowered and then released, the stopper device 24 is released from its own weight drop prevention operation, and the lifting / lowering cord 7 is wound from the winding shaft 10. Returned, the bottom rail 5 descends.

2. Second Embodiment The pleated screen of the present embodiment is similar to the first embodiment, and the bottom rail 5 can be raised by alternately lowering the first portion 13a and the second portion 13b of the operation cord 13. It is common in that respect. On the other hand, this embodiment is different from the first embodiment in the configuration of the operation unit 23. Hereinafter, the difference will be mainly described.

  As shown in FIGS. 19 to 22, an operation cord 13 is hung on the operation pulley 11, and the rotation in the direction of arrow P applied to the operation pulley 11 when the first portion 13 a of the operation cord 13 is pulled down. The rotation in the arrow Q direction applied to the operation pulley 11 when the second portion 13b of the operation cord 13 is pulled down is converted into the rotation in the arrow A direction shown in FIG.

  The conversion gear 2 includes an input shaft 2a. The input shaft 2a is attached to the operation pulley 11 so as to rotate integrally with the operation pulley 11.

  Spur gears 2f and 2g are attached to the input shaft 2a via a one-way clutch (not shown). Due to the action of the one-way clutch, only rotation in the direction of arrow Q is transmitted to the spur gear 2f, and only rotation in the direction of arrow P is transmitted to the spur gear 2g.

  When the operation pulley 11 is rotated in the arrow P direction in the state shown in FIG. 19, the rotation is transmitted to the spur gear 2g through the input shaft 2a, and the spur gear 2g is rotated in the arrow P direction. On the other hand, when the operation pulley 11 is rotated in the arrow Q direction, the rotation is transmitted to the spur gear 2f through the input shaft 2a, and the spur gear 2f is rotated in the arrow Q direction.

  The spur gear 2g is meshed with the spur gear 2i, and when the spur gear 2g rotates in the direction of arrow P, the spur gear 2i rotates in the direction of arrow Q accordingly, and the bevel gear formed integrally with the spur gear 2i. 2 m also rotates in the direction of arrow Q. When the bevel gear 2m rotates in the arrow Q direction, the bevel gear 2n that meshes with the bevel gear 2m rotates in the arrow A direction. Since the output shaft 2q is formed integrally with the bevel gear 2n, the output shaft 2q also rotates in the arrow A direction. The rotation of the output shaft 2q is input to the input portion 21a of the transmission clutch 21 as in FIG. 10 of the first embodiment. The bevel gear 2m is also meshed with the bevel gear 2o, and the bevel gear 2o rotates in the arrow B direction in FIG. 22 as the bevel gear 2m rotates in the arrow Q direction.

  On the other hand, as shown in FIGS. 19 to 21, the spur gear 2 f is meshed with the spur gear 2 h, and when the spur gear 2 f rotates in the arrow Q direction, the spur gear 2 h rotates in the arrow P direction accordingly. The bevel gear 21 formed integrally with the spur gear 2h also rotates in the arrow P direction. When the bevel gear 21 is rotated in the direction of the arrow P, the bevel gear 2n and the output shaft 2q that mesh with the bevel gear 21 are rotated in the direction of the arrow A. The bevel gear 2l is also meshed with the bevel gear 2o, and the bevel gear 2o rotates in the arrow B direction in FIG. 22 as the bevel gear 2l rotates in the arrow P direction.

  As the bevel gear 2m rotates in the direction of arrow Q, the bevel gears 2n and 2o rotate in the directions of arrow A and arrow B in FIG. 22, respectively. As a result, the bevel gear 21 rotates in the direction of arrow P. Accordingly, the spur gear 2h rotates in the arrow P direction.

  When the spur gear 2h rotates in the arrow P direction, the spur gear 2f rotates in the arrow Q direction. Since the spur gear 2f is attached to the input shaft 2a via a one-way clutch that transmits only the rotation of the input shaft 2a in the direction of arrow Q, the rotation of the spur gear 2f in the direction of arrow Q is applied to the input shaft 2a. Not transmitted. This is because the rotation of the spur gear 2f in the direction of the arrow Q has the same relative rotational direction as the rotation of the input shaft 2a in the direction of the arrow P. Therefore, the rotation of the bevel gear 2n is not hindered by the bevel gear 21.

  Further, as the bevel gear 2l rotates in the direction of arrow P, the bevel gears 2n and 2o rotate in the directions of arrows A and B in FIG. 22, respectively. As a result, the bevel gear 2m rotates in the direction of arrow Q. . Since this rotation is not transmitted to the input shaft 2a for the same reason as described above, the rotation of the bevel gear 2n is not hindered by the bevel gear 2m.

  As described above, the output shaft 2q rotates in the arrow A direction regardless of whether the operation pulley 11 is rotated in the arrow Q direction or the arrow P direction.

  As shown in FIGS. 15 to 18, the conversion gear 2 is accommodated in a gear case configured by combining first and second gear cases 63 and 64. The first and second gear cases 63 and 64 are connected by a connecting plate 62 provided outside the room. The first and second gear cases 63 and 64 include pulley support attachment portions 63 a and 64 a for attaching the pulley support 34 that supports the operation pulley 11. The pulley support 34 includes a base 34a, a support wall 34b suspended from the base 34a, and a support cylinder 34c protruding from the support wall 34b toward the head box 1 side. The operation pulley 11 includes a circular support hole 11b into which the support cylinder 34c is inserted. By attaching the base 34a to the pulley support attaching portions 63a and 64a with the support cylinder 34c inserted into the support hole 11b, the operation pulley 11 can be rotated while being supported by the support cylinder 34c.

  As shown in FIG. 17, the first gear case 63 includes semicircular cutouts 63b, 63c, 63d, and 63e, and a circular support hole 63f. As shown in FIG. 18, the first gear case 64 includes semicircular cutouts 64b, 64c, 64d, and 64e and a circular insertion hole 64f. The first input shaft 2a is inserted into a circular insertion hole in which the notches 63b and 64b are combined. The support shaft 2e of the second input shaft 2c is rotatably supported by a circular support hole in which the notches 63c and 64c are combined. The support shaft 2k of the spur gear 2i is rotatably supported by a circular support hole in which the notches 63d and 64d are combined. The support shaft 2j of the spur gear 2h is rotatably supported by a circular support hole in which the notches 63e and 64e are combined. The support shaft 2p of the bevel gear 2o is rotatably supported by the support hole 63f. The output shaft 2q is inserted through the insertion hole 64f.

3. Other Embodiments The present invention relates to an operation-side rotating body capable of bidirectional input rotation and a bidirectional input rotation of the operation-side rotating body in a shielding material driving apparatus that opens and closes a shielding material by rotation of a drive shaft. It is characterized by a configuration including a rotation transmission unit that outputs to the drive shaft as rotation only in the direction, and can be applied to various shielding devices that can employ such a configuration.
Shielding devices can be opened and closed vertically such as pleated screens, horizontal blinds, raised curtains, and roll screens, and can be opened and closed horizontally such as vertical blinds, curtains attached to curtain rails, and partitions. Things.
The mechanism for opening and closing the shielding material may be a mechanism for winding and unwinding the lifting / lowering cord with respect to the winding shaft, such as a pleated screen, a horizontal blind, and a hoisting curtain, such as a roll screen. It may be a mechanism that winds and unwinds the shielding material with respect to the winding shaft, and is a mechanism that moves the runner along the hanger rail by rotating the drive shaft, like a vertical blind. Also good.

  In the shielding apparatus according to the present invention, normally, the user moves the shielding material in one of the opening direction and the closing direction by an operation, and uses the gravity or the biasing force of a spring or the like to open and close the shielding material. Automatically move in the other direction. In this case, it is preferable to provide a stopper device that stops the movement of the shielding material so that the shielding material does not automatically move when not operated, and to be configured so that the operation of the stopper device can be released by a user operation.

  In the above embodiment, the shielding material is raised by one-way rotation of the drive shaft, and the shielding material is automatically lowered by its own weight by releasing the operation of the stopper device. However, the shielding material is lowered by one-way rotation of the driving shaft. The shielding material may be automatically raised by releasing the operation of the stopper device. As a method for automatically raising the shielding material, there is a method in which the shielding material is always urged in the winding direction by a winding spring like a roll screen.

  In addition, for vertical blinds, curtain rails, partitions, etc., as a method of automatically moving the leading runners, rivets, etc., the hanger rails are tilted, or a separate weight or spring is provided to use the biasing force. A method is mentioned. In such an auto-close or auto-open type vertical blind, curtain rail, partition, etc., the user moves the shielding material in one of the opening direction and the closing direction, and the user releases the operation of the stopper device. Thus, the shielding material can be moved in the other of the opening direction and the closing direction.

  The method of rotating the operation side rotating body is not limited to the method of rotating the operation pulley by operating the operation cord as in the above embodiment, and inputting the rotation to the input shaft of the conversion gear. A system in which the operation side rotating body is rotated in both directions by an operation pole, an operation dial, and a magnet roller (an operation device through glass in the case of a multi-layer built-in blind) may be used. In US Pat. No. 5,476,132, an operating tool is attached to a spiral rod via a one-way bearing, and the spiral rod is rotated in one direction by moving the operating tool in one direction, and the shielding material is moved up and down using the rotation. However, a spiral bar having the same configuration as that of this publication and an operation tool are engaged without using a one-way bearing, the spiral bar is rotated in one direction when the operation tool is raised, and the operation bar is moved when the operation tool is lowered. A system in which the operation side rotating body is rotated in both directions by rotating in the direction may be used.

  As a type of the stopper device, not only a fixed stop position type as in the above embodiment but also a free position stop type (through a clutch spring as in JP-A-5-179878) may be used.

  In the above embodiment, a rotation transmission unit that changes bidirectional rotation to one-way rotation is provided at a position adjacent to the operation pulley. However, the position at which the rotation transmission unit is provided is not limited to such a position. May be directly connected to the drive shaft, the drive shaft may be rotated in both directions, and a rotation transmitting unit that converts the bidirectional rotation into a unidirectional rotation may be disposed at a position adjacent to the winding shaft. In this case, the shaft that rotates the winding shaft is the “drive shaft” in the claims. Moreover, you may provide a rotation transmission part for every winding axis | shaft.

1: Head box 2: Conversion gear 4: Screen 5: Bottom rail 7: Lifting cord 8: Support member 10: Winding shaft 11: Operation pulley 12: Drive shaft 13: Operation cord 21: Transmission clutch 24: Stopper device 33: Conversion gear 36: governor device 39: pitch holding cord

Claims (5)

A shielding device that can open and close the shielding material by pulling an operation code,
The operation cord includes a first portion and a second portion facing each other.
A shielding apparatus, wherein the shielding material is moved in one of an opening direction and a closing direction by performing an alternate pulling operation for alternately pulling the first part and the second part.   The shielding device according to claim 1, wherein the operation cord is end-shaped. The operation cord is hung on a pulley,
The shielding device according to claim 2, wherein the operation cord includes a locking member that prevents the operation cord from coming off the pulley. The shielding material is configured to automatically move in the other direction of the opening direction and the closing direction,
The shielding apparatus as described in any one of Claims 1-3 provided with the stopper apparatus which stops the automatic movement of the said shielding material. A drive shaft that rotates in one direction by the alternate pulling operation,
The shielding device according to any one of claims 1 to 4, wherein the shielding material is configured to move in the one direction along with the rotation of the drive shaft.