JP5315009B2 - blind - Google Patents

Description

  According to the present invention, in a blind such as a horizontal blind having a first shielding material and a second shielding material, a roman shade, a pleated screen, and a roll screen, the raising / lowering operation of both shielding materials can be performed by operating a common operation shaft. Concerning blinds.

  As a conventional blind, what was described in patent document 1 is known. In this elevating device for solar radiation shielding material, it is possible to select the first and second elevating operation parts, the state for preventing the first and second solar radiation shielding material from falling by its own weight, and the state for allowing the lowering of its own weight. The first and second stopper units are provided. In addition, by operating one of the operation cords, the first elevating operation unit and the first stopper unit are operated, and the first solar shading material is lifted without raising and lowering the second solar shading material, A first clutch unit that enables selection of a descent operation due to its own weight and a self-weight descent prevention operation, and an operation to the other of the operation cords activates the second elevating operation unit and the second stopper unit, And a second clutch unit that can select a lifting operation of the second solar shielding material, a lowering operation due to its own weight, and an operation for preventing its own weight lowering without raising or lowering the one solar radiation shielding material.

  When pulling up the first solar shading material, the first solar shading material is pulled up by performing an operation of pulling down an operation cord that hangs down indoors (near side). If the operation cord is released after the first solar shading material is pulled up to a desired position, the first stopper unit is activated to prevent the first solar shading material from falling by its own weight. When lowering the first solar shading material, pulling the operation cord hanging down indoors (near side) slightly downward causes the first stopper unit to operate and the first solar shading material Descent with its own weight. As described above, the raising / lowering operation of the first solar shading material is performed by operating the operation cord that hangs down to the indoor side (front side).

  Moreover, when pulling up the second solar shading material, the second solar shading material is pulled up by performing an operation of pulling the operation cord hanging down from the outdoor side (back side) downward. If the operation cord is released after the second solar shading material is pulled up to a desired position, the second stopper unit is actuated to prevent the second solar shading material from falling by its own weight. When lowering the second solar shading material, pull the operation cord hanging down to the outside (back side) slightly downward, the second stopper unit will operate and the second solar shading material will Descent with its own weight. Thus, the raising / lowering operation of the 2nd solar radiation shielding material is performed by operating the operation code which hangs down to the outdoor side (back side).

  Thus, the operation of raising and lowering the first solar shading material and the raising and lowering operation of the second solar shading material can be performed independently by operating one operation code.

JP 2004-16422 A

  In the blind described in Patent Document 1, it is necessary to operate different portions of the operation code between when the first solar shielding material is raised and lowered and when the second solar shielding material is raised and lowered. However, when a person unfamiliar with the operation operates the operation code, there is a problem that it is difficult to perform the same operation when a different part of the operation code is operated. For example, when comparing the indoor side (front side) and the outdoor side (back side) of the operation code, the operation on the outdoor side (back side) is more difficult than the operation on the indoor side (front side).

  This invention is made | formed in view of this subject, and it aims at providing the blind which can raise / lower the two shielding materials by simpler operation.

In order to achieve the above-described object, the invention according to claim 1 is characterized in that the first shielding member under the action of urging in either one of the upward direction and the downward direction,
A second shielding material under the action of urging in either one of the upward direction or the downward direction;
A first drive shaft that is rotatably supported and connected to the first shielding member, the rotation direction of which corresponds to the lifting and lowering operation of the first shielding member;
A second drive shaft that is rotatably supported and connected to the second shielding material, the rotation direction of which corresponds to the lifting and lowering operation of the second shielding material;
A first stopper that can be switched between a state that allows rotation of the first drive shaft corresponding to the biased direction of the first shielding member and a state that restricts the rotation;
A second stopper that can be switched between a state allowing and restricting rotation of the second drive shaft corresponding to the biased direction of the second shielding member;
An operating shaft that rotates when the operating force is transmitted;
A clutch provided between the operation shaft and the first drive shaft and the second drive shaft, and the clutch rotates from the operation shaft to the first drive shaft when the operation shaft is rotated in one direction. When transmitted to one of the two drive shafts and rotated in one direction after rotating the operation shaft in the other direction, the rotation from the operation shaft is transferred to the other drive shaft of the first drive shaft and the second drive shaft. It is characterized by transmitting.

  According to a second aspect of the present invention, the clutch according to the first aspect connects the operation shaft, the first drive shaft, and the second drive shaft when the operation shaft is rotated in one direction. When the operation shaft is rotated in the other direction and then rotated in one direction, the operation shaft, the first drive shaft, and the second drive shaft are connected to each other.

According to a third aspect of the present invention, when the operating shaft according to the first or second aspect is rotated in the other direction, the rotation of the drive shaft connected at that time is applied to the first and second stoppers . By being restricted by either one of them, further rotation of the operation shaft in the other direction is restricted.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the first stopper has a first drive shaft in a direction opposite to a direction in which the first shielding member is urged. When rotated in the corresponding direction by a set angle or more, rotation of the first drive shaft in the direction corresponding to the biased direction of the first shielding material is restricted, and the first drive shaft is biased by the first shielding material. The first drive shaft is allowed to rotate in the direction corresponding to the biased direction of the first shielding member when rotated to a set angle in a direction corresponding to the opposite direction of the first direction,
When the second drive shaft is rotated by a set angle or more in a direction corresponding to a direction opposite to the direction in which the second shielding material is urged, the second stopper is urged by the second shielding material of the second driving shaft. When the second drive shaft is rotated to a set angle in a direction corresponding to a direction opposite to the biased direction of the second shielding material, the rotation of the second drive shaft is controlled. Rotation in a direction corresponding to the biased direction of the second shielding material is allowed.

  According to a fifth aspect of the present invention, the first shielding material and / or the second shielding material according to any one of the first to fourth aspects is under an action of urging in a downward direction by its own weight. And

  According to a sixth aspect of the present invention, the first drive shaft and / or the second drive shaft according to the fifth aspect has the other end of a cord connected at one end to the first shielding material and / or the second shielding material. A winding drum connected so as to be capable of winding and unwinding is connected.

  According to a seventh aspect of the present invention, the first shielding material and / or the second shielding material according to any one of the first to fourth aspects is under an action of urging in an upward direction by a winding spring. It is characterized by.

  According to an eighth aspect of the present invention, the first drive shaft and / or the second drive shaft according to the seventh aspect is coupled to one end of the first shielding member and / or the second shielding member so as to be wound and unwound. The wound winding pipes are connected.

The invention according to claim 9 is the one according to any one of claims 1 to 8 , wherein the loop-shaped operation cord or two cords are arranged so that the operation cord is positioned on the front side and the back side of the operation shaft. opcode been arranged, the operating shaft by the operation code that position on the front side are operated by rotating to the one direction, the operating shaft by the operation code that position on the far side is operated The rotation is performed in the other direction.

  According to the present invention, the two shielding materials can be moved up and down by an operation in one direction of the operation shaft, and the operation in the other direction of the operation shaft is used as a means for switching the operating shielding material. Therefore, in the lifting / lowering operation of the shielding material, any shielding material can be lifted / lowered by an operation in one direction of the operation axis, that is, the same operation, so that the operation becomes simple.

  In addition, when the operating shaft is operated in the other direction, the operation is prevented from further operation by preventing the further rotation of the operating shaft in the other direction from being restricted by the stopper. Since the operation shaft is operated in one direction, the raising / lowering operation and the switching operation of the shielding material to be raised / lowered are completely separated, and the operation is easy to understand and simple.

  In addition, by operating the operation cord arranged on the front side, by rotating the operation shaft in the one direction, it is possible to perform the lifting operation of any shielding material by the operation on the near side, which is easy to operate, There is no trouble of continuing to operate the operation cord arranged on the back side, and the lifting operation is simplified.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a front view showing a first embodiment of a blind according to the present invention, and FIG. 2 is a plan view schematically showing the arrangement of each member in the head box.

  In the figure, reference numeral 10 denotes a head box, which is fixed to a window frame, a wall surface or the like by a bracket 11, and an upper end of a shielding material 14 is attached to the head box 10. An intermediate bar 18 is attached to the lower end of the shielding material 14, and the upper end of the shielding material 16 is attached to the intermediate bar 18. The lower end of the shielding material 16 is a bottom rail 20, and each of the shielding material 14 and the shielding material 16 is configured by a screen that can be folded in a zigzag shape.

  A lifting / lowering cord 22 is suspended from the head box 10 so that it can be lifted / lowered. One end of the lifting / lowering cord 22 is connected to the bottom rail 20 through the flanges of the shielding member 14 and the flanges of the intermediate bar 18 and the shielding member 16. Is done. The other end of the lifting / lowering cord 22 is connected to a first winding drum 24 rotatably supported in the head box 10 so as to be wound and unwound. One winding shaft 26 is connected so as to rotate integrally. The shielding material 16 is under the action of urging the shielding material 16 in the downward direction by its own weight, and allows the unwinding direction of the lifting / lowering cord 22 of the first winding shaft 26 corresponding to the downward direction of the shielding material 16 to be permitted. The first winding shaft 26 is provided with a first stopper 27 that can be switched between a state to be controlled and a state to be restricted.

  Similarly, a dimming cord 32 is suspended from the head box 10 so as to be movable up and down, and one end of the dimming cord 32 is connected to the intermediate bar 18 through each hook of the shielding material 14. The other end of the dimming cord 32 is connected to a second winding drum 34 rotatably supported in the head box 10 so as to be wound and unwound. A second winding shaft 36 is connected to the second winding drum 34 so as to rotate integrally. The shielding material 14 is under the action of urging the shielding material 14 in the downward direction by its own weight, and allows rotation of the lifting cord 22 of the second winding shaft 36 in the unwinding direction corresponding to the downward direction of the shielding material 14. The second winding shaft 36 is provided with a second stopper 37 that can be switched between a state to be controlled and a state to be restricted.

  The first winding shaft 26 and the second winding shaft 36 extend in parallel with each other in the head box 10, and one end thereof is connected to an operation unit 40 provided at one end of the head box 10. .

  The operation unit 40 includes a first drive shaft 42 that is coupled to the first winding shaft 26 so as to be integrally rotatable, a second drive shaft 44 that is coupled to the second winding shaft 36 so as to be integrally rotatable, and a clutch 46. The operation shaft 50, the pulley 52, the first transmission gear 54 that rotates integrally with the pulley 52, and the second transmission gear 55 that meshes with the first transmission gear 54 and transmits the rotation of the pulley 52 to the operation shaft 50. Is done. A loop-shaped operation cord 70 capable of rotating the pulley 52 is wound around the pulley 52, and the operation cord 70 is suspended from the head box 10.

  The clutch 46 will be described in detail with reference to FIGS.

  The clutch 46 selectively transmits the rotation of the operation shaft 50 transmitted from the pulley 52 to either the first drive shaft 42 or the second drive shaft 44. The first clutch gear 48 and the second clutch gear 49, a clutch frame 56, a clutch pin 58, a clutch shaft 60, a clutch seat 62, and a spring 64.

  The first clutch gear 48 and the second clutch gear 49 are arranged coaxially and mesh with gears formed on the outer peripheral surfaces of the first drive shaft 42 and the second drive shaft 44, respectively.

  On the inner peripheral surfaces of the first clutch gear 48 and the second clutch gear 49, projections 48a and 49a projecting in the diametrical direction are formed at three positions spaced at equal intervals (120 degrees) in the circumferential direction, respectively. The first clutch gear 48 and the second clutch gear 49 are loosely fitted on the outer peripheral side of the clutch frame 56. As shown in FIG. 4, the axial position of the clutch frame 56 corresponding to the first clutch gear 48 and the second clutch gear 49 is 3 at equal intervals (120 degrees) in the circumferential direction of the clutch frame 56. Openings 56a and 56b are provided at the locations.

  The position where the opening 56a corresponding to the first clutch gear 48 and the opening 56b corresponding to the second clutch gear 49 are provided is at a phase of 60 degrees with respect to the circumferential direction of the clutch frame 56 as shown in FIG. The clutch pins 58 are inserted into the openings 56a and 56b, respectively.

  An insertion portion 60a of the clutch shaft 60 is rotatably fitted and inserted into the clutch frame 56. As shown in FIG. 6, the outer circumferential surface of the insertion portion 60a is equally spaced in the circumferential direction. Concave portions 60b into which the clutch pins 58 can be inserted are formed at three positions with a gap of (120 degrees).

  Each clutch pin 58 is movable between a position projecting radially from the outer peripheral surface of the clutch frame 56 and a position retracting into the clutch frame 56, and a portion of the clutch shaft 60 that is not the recess 60 b and the clutch frame. When the opening 56a or 56b of 56 is aligned in the circumferential direction, the clutch pin 58 protrudes from the outer peripheral surface of the clutch frame 56, and the recess 60b of the clutch shaft 60 and the opening 56a or 56b of the clutch frame 56 are in the circumferential direction. When aligned, the clutch frame 56 is immersed. When the clutch pin 58 protrudes, the clutch pin 58 comes into contact with the projection 48a of the first clutch gear 48 or the projection 49a of the second clutch gear 49, so the clutch frame 56 and the first clutch gear 48 or the second clutch gear. 49 and connect to rotate together. On the other hand, when the clutch pin 58 is retracted, the clutch pin 58 is separated from the first clutch gear 48 or the second clutch gear 49, so that the clutch frame 56 and the first clutch gear 48 or the second clutch gear 49 are not connected. Become.

  A large-diameter portion is formed at the end of the clutch frame 56, a ratchet 56c is formed on the end surface of the large-diameter portion, and a pair of protrusions 56d are opposed to each other in the axial direction so as to be 180 degrees in the circumferential direction. Projected apart.

  Further, the clutch shaft 60 is formed with a large-diameter portion having a larger radial dimension than the insertion portion 60a adjacent to the insertion portion 60a, and the first ratchet on the surface of the clutch frame 56 facing the ratchet 56c. 60c, and the second ratchet 60d is formed on the opposite surface. The clutch shaft 60 has a shaft portion 60e extending from a large diameter portion where the ratchets 60c and 60d are formed. The shaft portion 60e extends in the clutch seat 62, the spring 64 and the drive shaft 50.

  A ratchet 62 a is formed on the clutch seat 62 on a surface facing the second ratchet 60 d formed on the clutch shaft 60. Further, a pair of protrusions 62 b are formed on the outer peripheral surface of the clutch seat 62.

  As shown in FIGS. 3E and 9A, one end 50c of the operation shaft 50 is coupled to the second transmission gear 55 so as not to be relatively rotatable. Further, the other end side of the operation shaft 50 has a cylindrical shape, and a recess 50b for receiving the protrusion 62b of the clutch seat 62 is formed on the inner peripheral surface thereof, and a fit between the protrusion 62b and the recess 50b is formed. Accordingly, the clutch seat 62 rotates integrally with the operation shaft 50 and the second transmission gear 55. A pair of notches 50a into which the pair of protrusions 56d of the clutch frame 56 are inserted are formed on the inner peripheral surface of the operation shaft 50 at positions different from the portion where the recess 50b is formed. The protrusion 56d is movable in the circumferential direction in the notch 50a, whereby the operation shaft 50 and the clutch frame 56 are coupled with play so as to be relatively rotatable by a predetermined angle (about 60 degrees).

  The spring 64 is inserted between the surface of the clutch seat 62 opposite to the surface on which the ratchet 62a is formed and the step portion in the operation shaft 50. The spring 64 is connected to the ratchet 62a of the clutch seat 62. The clutch shaft 60 is biased toward the second ratchet 60d.

  As shown in FIG. 10, the first ratchet 60c and the second ratchet 60d of the clutch shaft 60 are formed so that the directions of the ratchet peaks are opposite to each other, so that the clutch shaft 60 is as described below. When the back side of the operation cord 70 is pulled downward, the ratchet 62a of the clutch seat 62 and the second ratchet 60d of the clutch shaft 60 do not mesh with each other, as shown in FIGS. 3 (b) and 10 (b). The first ratchet 60c of the clutch shaft 60 and the ratchet 56c of the clutch frame 56 mesh with each other, and when the front side of the operation cord 70 is pulled downward, as shown in FIGS. 3 (c) and 10 (c). Further, the ratchet 62a of the clutch seat 62 and the second ratchet 60d of the clutch shaft 60 are engaged with each other, and the first ratchet 60c of the clutch shaft 60 and the latch of the clutch frame 56 are latched. Tsu and the door 56c is set so that the relationship is established that do not mesh.

  The operation of the operation unit 40 configured as described above will be described. When the rear side 70b of the operation cord 70 shown in FIG. 3E is pulled downward and the pulley 52 is rotated in a corresponding direction, the first transmission gear 54 is integrated with the pulley 52 counterclockwise in FIG. The rotation is transmitted to the second transmission gear 55, and the operation shaft 50 rotates clockwise as shown in FIG. 9A together with the second transmission gear 55.

  When the operation shaft 50 rotates clockwise, the clutch seat 62 rotates together with the operation shaft 50. However, as shown in FIGS. 3B and 10B, the ratchet 62a of the clutch seat 62 and the second ratchet 60d of the clutch shaft 60 do not mesh with each other, whereas the first ratchet 60c of the clutch shaft 60 is not engaged. And the ratchet 56c of the clutch frame 56 mesh with each other. On the other hand, as shown in FIG. 9A, since there is play between the notch 50a of the operation shaft 50 and the projection 56d of the clutch frame 56, the operation shaft 50 has an end surface of the notch 50a at the clutch frame. It can rotate with respect to the clutch frame 56 until it abuts against the projection 56d of 56. At this time, if the ratchet 62a of the clutch seat 62 climbs over the mountain of the second ratchet 60d of the clutch shaft 60, a clicking sound will be heard when the ratchet 62a is climbed over.

  After the end surface of the notch 50a comes into contact with the projection 56d of the clutch frame 56, when the front side 70a of the operation cord 70 is pulled downward and the pulley 52 is rotated in the corresponding direction, the operation is performed as shown in FIG. 9B. The shaft 50 and the clutch seat 62 rotate to the opposite side, and the ratchet 62a of the clutch seat 62 meshes with the second ratchet 60d of the clutch shaft 60 that has passed over as shown in FIGS. 3 (c) and 10 (c). Therefore, the clutch shaft 60 rotates together with the operation shaft 50 and the clutch seat 62. However, since the first ratchet 60 c of the clutch shaft 60 and the ratchet 56 c of the clutch frame 56 do not mesh with each other, relative rotation occurs between the clutch shaft 60 and the clutch frame 56.

  As a result, as shown in FIGS. 7B and 8B, the clutch pin 58 protrudes in the first clutch gear 48 and the clutch pin 58 is immersed in the second clutch gear 49. Then, the clutch pin 58 engages with the protrusion 48 a of the first clutch gear 48, the first clutch gear 48 is connected to the clutch frame 56, and the second clutch gear 49 is disconnected from the clutch frame 56.

  When the first ratchet 60c of the clutch shaft 60 gets over the mountain of the ratchet 56c of the clutch frame 56, a clicking sound is heard when it gets over.

  Further, when the operation shaft 50 continues to rotate and the operation shaft 50, the clutch seat 62, and the clutch shaft 60 rotate about 60 ° relative to the clutch frame 56, the end surface of the notch 50a is moved as shown in FIG. The clutch frame 56 rotates together with the operation shaft 50 in contact with the protrusion 56d of the clutch frame 56.

  Through a series of these operations, the operation force on the near side of the operation cord 70 can be transmitted to the first drive shaft 42 via the first clutch gear 48.

  Next, in order to switch the transmittable drive shaft to the second drive shaft 44, the back side 70 b of the operation cord 70 is again pulled downward to rotate the pulley 52 in the corresponding direction, and then the front side of the operation cord 70. By pulling 70a downward, relative rotation occurs between the clutch shaft 60 and the clutch frame 56, and as shown in FIGS. 7 (a) and 8 (a), in the first clutch gear 48. The clutch pin 58 is immersed, and the clutch pin 58 protrudes in the second clutch gear 49. Then, the clutch pin 58 engages with the protrusion 49 a of the second clutch gear 49, the second clutch gear 49 is connected to the clutch frame 56, and the first clutch gear 48 is disconnected from the clutch frame 56.

  In the above description, the description has been made in accordance with the illustrated configuration. However, for example, even when the operation unit 40 having the same configuration is reversed left and right, the same switching operation can be performed. In this case, however, the relative rotation between the clutch shaft 60 and the clutch frame 56 occurs when the operation shaft 50 is rotated by pulling the back side of the operation cord 70 downward and rotating the pulley 52 in a corresponding direction. Therefore, it should be noted that a drive shaft switching operation that can be transmitted is performed.

  In any case, if the operation shaft 50 is rotated in one direction and rotated in the other direction, the drive shaft to which the rotation of the operation shaft is transmitted can be switched.

  Next, based on FIG.11 and FIG.12, the 1st stopper 27 and the 2nd stopper 37 are demonstrated. The first stopper 27 switches between allowing and restricting the rotation of the first winding shaft 26 and the first drive shaft 42, and the second stopper 37 allows the rotation of the second winding shaft 36 and the second drive shaft 44. And switch between regulations. Since the first stopper 27 and the second stopper 37 have the same configuration, the second stopper 37 will be described as an example.

  The second stopper 37 is rotatably supported by the stopper case 66 and the stopper case 66, and an input shaft 68 through which the second winding shaft 36 passes and rotates integrally with the second winding shaft 36. A cam drum 72 fitted on the outer peripheral side of the small-diameter portion of the input shaft 68; a slider 74 slidable in the axial direction within a vertical groove 66a formed on the inner peripheral surface of the stopper case 66; Coil-shaped clutch springs 76 wound around the outer peripheral surface of the large-diameter portion and the respective outer peripheral surfaces of the cam drum 72. One end of the clutch spring 76 is connected to the input shaft 68 and the other end is connected to the cam drum 72.

  A guide groove 72a is formed on the outer peripheral surface of the cam drum 72, and the slider 74 can slide in the guide groove 72a. As shown in FIG. 12, the guide groove 72a is composed of an endless loop 72b extending endlessly in the circumferential direction of the cam drum 72, and a branch loop 72c branched from the endless loop 72b. A portion 72d and a second locking portion 72e are formed.

  The operation of the stopper configured as described above will be described. First, when the second winding shaft 36 is rotated in the upward direction of the shielding material, the cam drum 72 is also rotated together with the input shaft 68. At this time, the cam drum 72 moves relatively from the endless loop 72b to the branching loop 72c as shown by the solid arrow in FIG. 12A, and reaches the first locking portion 72d. . Therefore, after this, the cam drum 72 cannot rotate in that direction, so that the clutch spring 76 is loosened, the input shaft 68 and the cam drum 72 are disconnected, and the input shaft 68 idles with respect to the cam drum 72. . Therefore, the shielding material is separated from the second stopper 37 and moves upward.

  Next, when the ascent operation is stopped, the second winding shaft 36 rotates in the descending direction of the shielding material by its own weight, and the cam drum 72 slightly rotates in the direction opposite to the ascending direction as shown in FIG. The slider 74 reaches the second locking portion 72e as indicated by the solid arrow in the drawing. Therefore, the cam drum 72 can no longer rotate in that direction, and the clutch spring 76 is tightened, so that the rotation of the input shaft 68 is restricted, and the stopper 37 restricts the rotation of the second winding shaft 36 and enters a stopped state. .

  Next, when the second winding shaft 36 is slightly rotated in the upward direction of the shielding material, the cam drum 72 is also rotated together with the input shaft 68, and the slider 74 is second as shown by the solid line arrow in FIG. After moving from the locking portion 72e to the endless loop 72b, as shown by the dashed-dotted arrow in FIG. 12C, the endless loop 72b moves relative to the branch loop 72c.

  Next, when the second winding shaft 36 is rotated in the shielding material lowering direction by the weight of the shielding material, the input shaft 68 is rotated together, the clutch spring 76 is tightened, and the input shaft 68 and the cam drum 72 are connected. And rotate together. At this time, in the cam drum 72, the slider 74, which has become non-rotatable with respect to the case 66, moves relative to the endless loop 72b of the guide groove 72a from top to bottom as indicated by the solid line arrow in FIG. Rotate.

  The slider 74 moves from the second locking portion 72e in FIG. 12B to the branching loop 72c through the endless loop 72b as shown in FIG. 12C, to a position 72f before reaching the first locking portion 72d. Until the rotation of the set angle of the second winding shaft 36 corresponding to the movement, the shielding member can be lowered. On the other hand, when the operation is stopped after the second winding shaft 36 is rotated by the set angle or more, the slider 74 moves to the second stop portion 72e, so that the shielding material stops.

  The overall operation of the blind constructed as described above will be described.

  When the shielding material is not operating, the rotation of the first winding shaft 26 and the second winding shaft 36 in the shielding material descending direction is restricted by the action of the first stopper 27 and the second stopper 37 described above. The shielding material 14 and the shielding material 16 are stopped (FIG. 13A).

  When the front side of the operation cord 70 is pulled downward from this state as shown in FIG. 13B, this operation force becomes the rotation of the operation shaft 50, and the rotation of the operation shaft 50 in the clutch 46 is applied to the clutch frame 56. It is transmitted to either the first drive shaft 42 or the second drive shaft 44 according to the connected clutch gear. Assuming that rotation is transmitted to the second drive shaft 44, the second winding shaft 36 winds the dimming cord 32, one end of the dimming cord 32 rises, and the intermediate bar 18 rises. The shielding material 14 is folded and the shielding material 16 is extended (FIG. 13C). At this time, in the second stopper 37, the slider 74 has reached the first locking portion 72d. When the operation is stopped, the slider 74 reaches the second locking portion 72e.

  Alternatively, as shown in FIG. 13D, when the front side of the operation cord 70 is slightly pulled downward, the slider 74 moves to the endless loop 72b in the second stopper 37, so that the shielding material 14 and the intermediate bar 18 The light control cord 32 is unwound from the second winding shaft 36 by its own weight, and the shielding material 14 and the intermediate bar 18 are lowered (FIG. 13E). Thereby, the shielding material 14 is extended and the shielding material 16 is folded.

  Further, when the front side of the operation cord 70 is continuously pulled downward, the shielding member 14 and the intermediate bar 18 rise (FIG. 13 (f)).

  Thus, the exposure ratio of the shielding material 14 and the shielding material 16 can be changed.

  In order to operate the lifting / lowering cord 22, as shown in FIG. 13 (g), the back side of the operation cord 70 is pulled. During the stop, as described above, the first stopper 27 and the second stopper 37 restrict the rotation of the first winding shaft 26 and the second winding shaft 36. The first clutch gear 48 and the second clutch gear 49 that mesh with the gears of the first drive shaft 42 and the second drive shaft 44 connected to the shaft 26 and the second winding shaft 36 are shown in FIGS. The clutch frame 56 connected to either the first clutch gear 48 or the second clutch gear 49 is restricted from rotating clockwise.

  From this state, when the operation cord 70 is operated to rotate the operation shaft 50 in the clockwise direction, the clutch frame 56 cannot be rotated together. Therefore, the end face of the notch 50a of the operation shaft 50 At this point, the operation cord 70 cannot be operated further to the back side when it contacts the projection 56d of the clutch frame 56. Further, since the ratchet 62a of the clutch seat 62 climbs over the mountain of the second ratchet 60d of the clutch shaft 60 just before the contact, a clicking sound is generated, so that the operator detects the limit of the operation amount by the sound. be able to.

  When it is detected that this clicking sound has been detected, when the operation shaft 70 is operated counterclockwise by operating the front side of the operation cord 70, the rotation transmission of the operation shaft 50 is first transmitted as described above. The drive shaft 42 is switched. By operating the front side of the operation cord 70 as it is, the first winding shaft 26 winds the lifting cord 22, the one end of the lifting cord 22 is raised, and the shielding member 16 and the bottom rail 20 are raised (FIG. 13). (H)).

  Alternatively, as shown in FIG. 13 (i), when the front side of the operation cord 70 is slightly pulled downward, the slider 74 moves to the endless loop 72b in the first stopper 27, so that the shielding material 16 and the bottom rail 20 Due to its own weight, the lifting / lowering cord 22 is unwound from the first winding shaft 26, and the shielding member 16 and the bottom rail 20 are lowered (FIG. 13 (j)).

  Again, as shown in FIGS. 13 (k) to 13 (l), after pulling the back side of the operation cord 70 downward and then pulling it to the near side, the rotation of the operation shaft 50 due to the operation of the operation cord 70 is transmitted. The take-up shaft can be switched.

  Further, as shown in FIG. 13 (f ′) from the state of FIG. 13 (e), switching is performed by pulling the back side of the operation cord 70, and the rotation of the operation shaft 50 by the operation of the operation cord 70 is the first winding. After switching to be transmitted to the shaft 26, when the front side of the operation cord 70 is pulled, the lifting / lowering cord 22 is wound (FIG. 13 (g ′)) and unwound (FIG. 13 (h) ')), The bottom rail 20 can be moved up and down (FIGS. 13 (g ′) to (i ′)).

  In this way, the blind can be changed to various states.

  As described above, according to the present embodiment, when the operation code 70 is operated to switch the drive shaft to which the rotation of the operation shaft 50 is transmitted, switching is performed by the operation on the back side of the operation code 70, The operation on the front side of the operation cord 70 is always the rotation operation of the first drive shaft or the second drive shaft, and the shielding material 14 and the shielding material 16 can be moved up and down. The side where the operation code 70 is easy to operate, for example, the front side, can be assigned to the lifting operation of the shielding material.

  Although the first transmission gear 54 and the second transmission gear 55 are provided in the operation unit 40, these may be omitted and the rotation of the pulley 52 may be transmitted directly to the operation shaft 50. In this case, the relative rotation between the clutch shaft 60 and the clutch frame 56 is performed when the operation cord 70 is pulled to the back side.

  In the above example, the pleated screen is taken as an example of the blind, but the present invention is not limited to this. For example, it can be applied to a roll screen as a blind. As shown in FIG. 14A, the roll screen includes two first winding pipes 102 and second winding pipes 112 that are rotatably supported by the side bracket 100. One end of the first shielding material 104 and the second shielding material 114 is attached to the pipe 102 and the second winding pipe 112 so as to be wound and unwound.

  A stopper is built in each of the first winding pipe 102 and the second winding pipe 112. As this stopper, for example, a stopper having the same configuration as the stopper 37 can be used. In this case, the cam drum 72 is connected to the take-up pipe so as to be integrally rotatable, and the input shaft 68 is connected to the fixed shaft. Can be configured.

  And the operation unit 40 similar to 1st Embodiment is provided in the edge part of the 1st winding pipe 102 and the 2nd winding pipe 112. FIG. The operation unit 40 can omit the first transmission gear 54 and the second transmission gear 55, the first drive shaft 42 of the clutch 46 is connected to the first winding pipe 102, and the second drive shaft 44 is not shown. It is connected to the second winding pipe 112 through a gear.

  In the blind constructed as described above, when the front side of the operation cord 70 is pulled downward as shown in FIGS. 14 (b) to 14 (c) to operate the shielding member, one of the first shieldings is performed. The material 104 rises according to the amount pulled. As shown in FIGS. 14D to 14E, when the front side of the operation cord 70 is slightly pulled downward, the first shielding member 104 is lowered by its own weight by releasing the stopper.

  Next, as shown in FIG. 14 (f), after pulling the back side of the operation cord 70 downward, when the front side is pulled downward, a switching operation is performed, and when the front side is pulled down as it is, the other side The second shielding material 114 rises in accordance with the amount pulled (FIG. 14 (g)). Further, when the front side of the operation cord 70 is slightly pulled downward, the second shielding member 114 is lowered by its own weight by releasing the stopper (FIG. 14 (h)).

  Further, by pulling the back side of the operation cord 70 and then pulling it toward the front side, the winding shaft to which the rotation of the operation shaft 50 due to the operation of the operation cord 70 is transmitted can be switched (FIG. 14 (i), (J), (h ′), (i ′)).

  FIG. 15 shows an example in which a roll screen is used as a blind, but unlike the example of FIG. 14, a winding spring that constantly urges the winding pipe in the shielding material winding direction is housed inside the winding pipe. ing. And the direction of the guide groove 72a of the cam drum 72 of the stopper incorporated in a winding pipe differs in the point which is contrary to the example of FIG.

  In this case, by pulling the front side of the operation cord 70 downward, the shielding material is lowered according to the amount pulled, and by pulling the front side of the operation cord 70 slightly downward, the shielding material is not dead weight. Although different in that it is biased in the direction of rising by the biasing force of the winding spring, the other switching operations are the same as in the example of FIG.

  FIG. 16 shows an example of a roman shade as a blind. In this case, the first shielding member 204 and the second shielding member 214 are suspended from the head box 10, and the first lifting / lowering cord 206 and the second lifting / lowering cord 216 are suspended from the head box 10. . One ends of the first elevating cord 206 and the second elevating cord 216 are connected to the lower ends of the first shielding material 204 and the second shielding material 206, respectively. The other end of the first lifting / lowering cord 206 is connected to a first winding drum rotatably supported in the head box 10 so as to be wound and unwound, and the other end of the second lifting / lowering cord 216 is It is connected to a second winding drum rotatably supported in the head box 10 so as to be wound and unwound. Similar to the first embodiment, the first winding drum and the second winding drum are coupled to the first winding shaft and the second winding shaft so as to be integrally rotatable.

  An operation unit 40 similar to that in the first embodiment is provided at one end of the head box 10. The operation unit 40 can omit the first transmission gear 54 and the second transmission gear 55, the first drive shaft 42 of the clutch 46 is connected to the first take-up shaft, and the second drive shaft 44 is a gear (not shown). It is connected to the 2nd winding axis via.

  The above roman shade can be similarly operated. In addition to the above blinds, the present invention can also be applied to a horizontal blind having a shielding material composed of two slat groups as a blind. Also, the two shielding materials of the blind can be different types of shielding materials, for example, one shielding material is under the action of urging in the downward direction by its own weight, and the other shielding material is taken up by a winding spring. It may be under the action of energizing in the upward direction.

  In the above example, the operation code 70 is one loop-shaped operation code. However, the operation code 70 is not limited to this, and can be two operation codes respectively arranged on the back side and the near side. By operating the operation code on the side, the operation shaft 50 can be rotated in one direction to operate each shielding material, and by operating the operation code on the back side, the operation shaft 50 can be moved in the other direction. The shielding material to be operated can be switched by rotating.

It is a front view showing 1st Embodiment of the blind which concerns on this invention. It is a top view which shows typically arrangement | positioning of each member in a head box. (A)-(c) is sectional drawing showing the internal structure of an operation unit, (d) is a top view of an operation unit, (e) is sectional drawing seen along the AA line of (d). It is. It is a disassembled perspective view of a clutch. (A) is sectional drawing seen along the BB line of FIG. 3 (a) of a clutch frame, (b) is sectional drawing seen along CC line of FIG. 3 (a) of a clutch frame. is there. It is sectional drawing of a clutch shaft. It is sectional drawing of a clutch shaft, a clutch frame, etc. which looked along the BB line of FIG.3 (d). FIG. 4 is a cross-sectional view of a clutch shaft, a clutch frame, and the like as seen along line CC in FIG. FIG. 4 is a cross-sectional view of an operation shaft, a clutch shaft, a clutch frame, and the like viewed along line DD in FIG. It is a top view which shows the relationship of the ratchet between a clutch seat, a clutch shaft, and a clutch frame. It is sectional drawing of a stopper. It is an expanded view of the cam drum of a stopper. It is a side view showing the whole effect | action of the pleat screen as a blind. It is a side view showing the whole effect | action of the roll screen as a blind. It is a side view showing the whole effect | action of another roll screen as a blind. It is a side view showing the whole effect | action of the Roman shade as a blind.

Explanation of symbols

16, 104, 204 First shielding material 14, 114, 214 Second shielding material 22 Lift code (code)
32 Dimming code (Code)
26, 36 Winding shafts 27, 37 Stopper 42 First drive shaft 44 Second drive shaft 46 Clutch 50 Operation shaft 70 Operation code 102, 112 Winding pipe 206 First lifting code (code)
216 Second lifting cord (code)

Claims (9)

A first shielding material under the action of urging in either one of the upward direction or the downward direction;
A second shielding material under the action of urging in either one of the upward direction or the downward direction;
A first drive shaft that is rotatably supported and connected to the first shielding member, the rotation direction of which corresponds to the lifting and lowering operation of the first shielding member;
A second drive shaft that is rotatably supported and connected to the second shielding material, the rotation direction of which corresponds to the lifting and lowering operation of the second shielding material;
A first stopper that can be switched between a state that allows rotation of the first drive shaft corresponding to the biased direction of the first shielding member and a state that restricts the rotation;
A second stopper that can be switched between a state allowing and restricting rotation of the second drive shaft corresponding to the biased direction of the second shielding member;
An operating shaft that rotates when the operating force is transmitted;
A clutch provided between the operation shaft and the first drive shaft and the second drive shaft, and the clutch rotates from the operation shaft to the first drive shaft when the operation shaft is rotated in one direction. When transmitted to one of the two drive shafts and rotated in one direction after rotating the operation shaft in the other direction, the rotation from the operation shaft is transferred to the other drive shaft of the first drive shaft and the second drive shaft. Blinds characterized by transmitting.   The clutch connects the operation shaft, the first drive shaft, and the second drive shaft when the operation shaft is rotated in one direction, and then rotates in one direction after rotating the operation shaft in the other direction. 2. The blind according to claim 1, wherein when the first drive shaft is rotated, the other of the operation shaft, the first drive shaft, and the second drive shaft is connected. When the operation shaft is rotated in the other direction, the rotation of the drive shaft connected at that time is restricted by one of the first stopper and the second stopper acting on the drive shaft, so that the operation shaft exceeds that. The blind according to claim 1, wherein rotation in the other direction is restricted. The first stopper biases the first shielding material of the first driving shaft when the first driving shaft is rotated by a set angle or more in a direction corresponding to a direction opposite to the direction in which the first shielding material is biased. When the first drive shaft is rotated to a set angle in a direction corresponding to the direction opposite to the direction in which the first shielding member is urged, the rotation of the first drive shaft is controlled. Allowing rotation in a direction corresponding to the biased direction of the first shielding material;
When the second drive shaft is rotated by a set angle or more in a direction corresponding to a direction opposite to the direction in which the second shielding material is urged, the second stopper is urged by the second shielding material of the second driving shaft. When the second drive shaft is rotated to a set angle in a direction corresponding to a direction opposite to the biased direction of the second shielding material, the rotation of the second drive shaft is controlled. The blind according to any one of claims 1 to 3, wherein the blind is allowed to rotate in a direction corresponding to a direction in which the second shielding member is urged.   The blind according to any one of claims 1 to 4, wherein the first shielding material and / or the second shielding material is under an action of urging in the downward direction by its own weight.   The winding drum in which the other end of the cord, one end of which is connected to the first shielding member and / or the second shielding member, is connected to the first driving shaft and / or the second driving shaft so as to be wound and unwound. The blind according to claim 5, wherein the two are connected.   The blind according to any one of claims 1 to 4, wherein the first shielding material and / or the second shielding material is under an action of being urged upward by a winding spring.   The first drive shaft and / or the second drive shaft is connected to a winding pipe in which one end of the first shielding material and / or the second shielding material is coupled so as to be wound and unwound. The blind according to claim 7. Operating shaft looped operation code or two opcode as front and each operation code into a rear side position of the arrangement, the operating shaft by the operation code that position on the front side is operated is rotated to one direction, any one of claims 1, characterized in that the operating shaft has to rotate to the other direction by operating code that position on the far side is operated 8 The listed blind.

Images