JP2017133346A - Blind apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blind apparatus having a speed adjusting function by a speed adjusting apparatus whose workability is improved.SOLUTION: A blind apparatus of the present invention comprises a speed adjusting apparatus 6 which restricts moving speed of elevation codes C1, C2, C3 so that moving speed in the one direction of a blind material (for example, a slat 3) is controlled at a constant value or less. The speed adjusting apparatus 6 comprises a pair of axes 62,64 which may sandwich the elevation codes C1, C2, C3, control means (for example, a rotary damper 63) which may rotate either or both of the pair of axes 62, 64 so as to apply a predetermined control torque, and pushing means (for example, a torsion spring 644) urging the pair of axes 62, 64 at a predetermined urging force so that they may sandwich and press the codes. By virtue that the pair of axes 62, 64 sandwiches the elevation codes, the moving speed of the elevation codes is restricted and upon manual operation, either axis among the pair of axes 62, 64 is movable in a direction away from the other axis.SELECTED DRAWING: Figure 4

Description

  According to the present invention, by operating the cord for moving the shielding material, the mechanism is automatically operated to adjust the speed in one direction of the opening / closing direction of the shielding material through the operation release of the stopper device, and the other direction is shielded as the manual operation. The present invention relates to a shielding device such as a horizontal blind, a pleated screen, a roman shade, or a vertical blind or an accordion curtain that can open and close the material.

  Typical as a shielding device that directly or indirectly transmits the operating force of the operation cord to the lifting / lowering cord to move the shielding material in one direction and automatically move the shielding material in the other direction. Has a horizontal blind that directly operates the lifting cord.

  In such a horizontal blind, a plurality of slats are suspended and supported from a head box via a plurality of ladder cords, and a bottom rail is suspended and supported at the lower end of the ladder cord. A plurality of lifting / lowering cords are inserted into each slat. One end of each lifting / lowering cord is connected to the bottom rail, and the other end is guided into the head box and connected to the operating device.

  In the operating device, a gear mechanism is disposed in the head box, and an input shaft of the gear mechanism projects out of the head box from an opening provided in the head box, and a tilt operating rod is provided at the tip of the input shaft. And the angle of the slats can be adjusted by rotating the tilt operation rod.

  On the other hand, the lifting / lowering cord is led out from the inside of the head box through the cord outlet and connected to one end portion of the operation cord via the cord equalizer, and the other end portion of the operation cord is connected to the bottom rail. Alternatively, the lifting / lowering cord may be guided from the head box through the cord outlet into the tilt operation rod and connected to the knob at the lower end thereof.

  When the operation cord and the knob are operated to pull out the lifting / lowering cord from the head box, the bottom rail is pulled up and the slat is raised.

  If the pulling-out operation of the lifting / lowering cord is stopped, the stopper device is actuated to prevent the slats and the bottom rail from falling by their own weight. Further, when the operation of the stopper device is released, the slat and the bottom rail descend based on their own weight.

  With such a release of the stopper device, the bottom rail and the slat are lowered by their own weight, and the slat is lowered smoothly and appropriately against the horizontal blind that lifts the slat by directly pulling the lifting cord. A technique of providing a brake device so that it can be performed at a speed is known (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 10-140950

  In the brake device in Patent Document 1, an elevating cord is bent and inserted in an S shape between a fixed pulley and a movable pulley, and the movable pulley approaches the fixed pulley as the elevating cord moves when the shielding material is lowered, and friction increases. As a result, the moving speed of the lifting / lowering cord is suppressed, while the movable pulley moves away from the fixed pulley as the lifting / lowering cord moves when the shielding material is raised, so that the friction is reduced.

  In this technique, knurling is engraved on the movable pulley so that it can move in the longitudinal direction with respect to the head box. However, since it is always in contact with the lifting / lowering cord, it is not necessary even when the lifting / lowering cord is moved due to the lifting operation of the slat 3. A certain amount of friction is generated, that is, a constant braking force is applied even when the slat 3 is raised, and the guidance load at that time increases. In addition, since the constant braking force always works, there is room for improvement in terms of responsiveness regarding the lifting operation.

  Accordingly, there is a demand for a technique for improving the operability and making the shielding device with speed adjustment.

  In view of the above problems, an object of the present invention is to provide a shielding device with speed adjustment by a speed adjusting device with improved operability.

  According to the shielding device of the present invention, by operating the cord for moving the shielding material, the operation of the stopper device is canceled, and one of the opening and closing directions of the shielding material is mechanically operated automatically and the other direction is manually operated. A shielding device comprising a speed adjusting device that enables opening and closing of the material and that limits the moving speed of the cord to brake the moving speed of the shielding material in one direction to a certain value or less, wherein the speed adjusting device includes the cord A pair of shafts that can be sandwiched, braking means that can rotate either one or both of the pair of shafts and apply a predetermined braking torque, and a predetermined that allows the cord to be sandwiched and pressed by the pair of shafts Urging means for urging with the urging force of the pair, the cord is sandwiched between the pair of shafts, the predetermined braking torque is applied to limit the moving speed of the cord, and the manual operation is performed. Wherein the one shaft of the pair of shaft against the predetermined biasing force when the work is constituted so as to be movable in a direction away from the other axis.

  In the shielding device of the present invention, any one of the pair of shafts is supported at a fixed position with respect to the frame of the speed adjusting device.

  In the shielding device of the present invention, both of the pair of shafts are supported so as to be movable with the cord sandwiched with respect to the frame of the speed adjusting device.

  In the shielding device of the present invention, both of the pair of shafts are configured to move in a direction in which they are separated in synchronization with each other against the predetermined biasing force.

  In the shielding device of the present invention, one of the pair of shafts is configured as a roller that applies a predetermined braking torque by the braking means, and the other shaft is configured as a roller that does not apply the predetermined braking torque. It is characterized by doing.

  In the shielding device of the present invention, one of the pair of shafts is configured as a roller that applies a predetermined braking torque by the braking means, and the other shaft is configured as a bar that does not apply the predetermined braking torque. It is characterized by doing.

  Further, in the shielding device of the present invention, the speed adjustment device is configured to further include a moving region that presses the cord with the predetermined urging force from a position where the cord is sandwiched between the pair of shafts. It is characterized by being.

  In the shielding device of the present invention, the speed adjusting device is provided in a frame that guides the cord, and the cord is pulled in a direction different from the guide direction in the frame, and One of the shafts is configured to be separated from the other shaft.

  Further, in the shielding device of the present invention, the shaft that is movable in the direction in which one of the pair of shafts is separated from the other shaft during the manual operation has a proximal end side with respect to the frame of the speed adjusting device. A pair of movable arms rotatably supported by the pair of movable arms is rotatably attached.

  Further, in the shielding device of the present invention, the speed adjusting device is provided in the vicinity of a cord outlet of a frame body that guides the cord, and is disposed at an installation angle corresponding to a hanging direction of the cord from the cord outlet. It is characterized by being.

  ADVANTAGE OF THE INVENTION According to this invention, the shielding apparatus with a speed adjustment by the speed adjustment apparatus which improved operativity is realizable.

It is a front view which shows schematic structure of the horizontal blind comprised as a shielding apparatus of one Embodiment by this invention. It is a see-through | perspective side view which shows partially the arrangement | positioning of the raising / lowering cord in the horizontal blind comprised as a shielding apparatus of one Embodiment by this invention. It is a disassembled perspective view of the speed control apparatus applied to the horizontal blind comprised as a shielding apparatus of one Embodiment by this invention. (A), (b) is the speed adjustment device applied to the horizontal blind configured as the shielding device according to the embodiment of the present invention, respectively, during the pulling operation of the lifting cord when lifting and lowering the slat and during the non-pulling operation It is a perspective view which shows roughly operation | movement. (A), (b) is the schematic front view explaining the moving range of the speed adjustment apparatus applied to the horizontal blind comprised as a shielding apparatus of one Embodiment by this invention, respectively, and its suitable example. . (A), (b) relates to a speed adjustment device applied to a horizontal blind configured as a shielding device according to an embodiment of the present invention, respectively, during a pulling operation of a lifting cord when lifting and lowering a slat (when a slat is lifted) ) And a schematic front view showing the operation of the speed adjusting device during a non-pull operation (when the slat is lowered). (A), (b), (c) is a partial front view of the periphery of a speed adjustment device applied to a modification of a horizontal blind configured as a shielding device according to an embodiment of the present invention, It is a simplified top view at the time of non-pull operation. (A) is a perspective view which shows the structure of the modification of the speed adjusting device based on this invention, (b), (c) is a schematic front view which shows the operation | movement. (A) is a perspective view which shows the structure of another modification of the speed adjusting device which concerns on this invention, (b), (c) is a schematic front view which shows the operation | movement. (A), (b), (c) is a perspective view which shows the structure of another modification of the speed adjusting device which concerns on this invention, respectively. (A), (b) relates to a speed adjusting device applied to an accordion curtain configured as a shielding device according to an embodiment of the present invention, respectively, at the time of pulling operation (opening operation) and non-pulling operation of the shielding material It is a schematic front view which shows the effect | action (at the time of closing operation).

  Hereinafter, with reference to drawings, the shielding device of each embodiment by the present invention is explained. In the present specification, with respect to the front view of the horizontal blind configured as the shielding device shown in FIG. Upper side) and lower direction (or lower side) are defined, the left direction in the figure is defined as the left side of the horizontal blind, and the right direction in the figure is defined as the right side of the horizontal blind. In the example described below, the front side (or indoor side) is the front side of the horizontal blind shown in FIG. 1, and the opposite side is the rear side (or outdoor side). The term “direction” refers to a direction perpendicular to the illustrated surface in the front view of FIG.

(overall structure)
FIG. 1 is a front view showing a schematic configuration of a horizontal blind configured as a shielding device according to an embodiment of the present invention. FIG. 2 is a perspective side view partially showing the arrangement of the lifting / lowering cords C1, C2, and C3 in the horizontal blind configured as the shielding device of the present embodiment. In the horizontal blind according to the present embodiment, a multi-stage slat 3 is suspended and supported via a ladder cord 2 suspended from both the left and right sides and the center of the head box 1, and a bottom rail 4 is provided at the lower end of the ladder cord 2. Suspended and supported.

  Further, from the vicinity of the left and right end portions of the head box 1, the elevating cords C1 and C3 are suspended from the ladder cord 2 on the outdoor side (see FIG. 2). The lifting / lowering cord C2 is suspended alongside the ladder cord 2 (not shown in FIG. 2). The bottom rail 4 is attached to the lower ends of the elevating cords C1, C2, and C3.

  A support member 5 that supports the ladder cord 2 and the lifting / lowering cords C1, C2, and C3 is disposed in the head box 1, and a hexagonal bar-shaped drive shaft 13 is inserted into the support member 5.

  A tilt drum 51 (see FIG. 2) is rotatably supported by the support member 5, and the drive shaft 13 is inserted into the tilt drum 51 so as not to be relatively rotatable. Therefore, when the drive shaft 13 is rotated, the tilt drum 51 is rotated, and the angles of the multi-stage slats 3 suspended and supported by the ladder cord 2 are adjusted in phase. As shown in FIG. 2, the support member 5 has the other end of the lifting / lowering cord C1 that attaches one end to the bottom rail 4 (the same applies to the other ends of the lifting / lowering cords C2 and C3) in the longitudinal direction in the head box 1. It is preferable to provide a turning pulley 52 that is turned to guide.

  On the right end side in the head box 1, there is formed a tilt window portion 11 for hanging a tilt operation rod 9 having one end attached to a tilt operation grip 10. The other end of the tilt operation rod 9 is connected to the gear mechanism 12 in the head box 1 through the tilt window 11. The gear mechanism 12 is connected to the drive shaft 13 and is configured to transmit the rotation of the tilt operation rod 9 to the rotation of the drive shaft 13. Therefore, by rotating the tilt operation grip 10, the rotation is transmitted to the drive shaft 13, and the angles of the multi-stage slats 3 suspended and supported by the ladder cord 2 through the support member 5 can be adjusted. it can.

  The other ends of the lifting / lowering cords C1, C2, and C3 that attach one end to the bottom rail 4 are guided to the right end side in the head box 1 through the support member 5, and through the stopper device 15 in the head box 1. After that, when inserted through the speed adjustment device 6 according to the present invention installed in the head box 1, it is suspended from the cord outlet 14 and connected to the cord equalizer 8.

  In the example shown in FIGS. 1 and 2, one end of the operation cord 7 is attached to the lower end of the cord equalizer 8 that connects the ends of the plurality of lifting cords C1, C2, and C3 suspended from the cord outlet 14. . The other end of the operation cord 7 is attached to the bottom rail 4.

  However, as a modification related to the hanging of the plurality of lifting / lowering cords C1, C2, and C3, the ends of the plurality of lifting / lowering cords C1, C2, and C3 are guided from the cord outlet 14 into the tilt operation rod 9 without being suspended. It can also be set as the structure connected to a knob in a lower end part.

  In the example shown in FIGS. 1 and 2, if the operation cord 7, the code equalizer 8, or the plurality of lift cords C 1, C 2, C 3 are operated and the lift cords C 1, C 2, C 3 are pulled out of the head box 1 from the cord outlet 14. The bottom rail 4 is pulled up and the slat 3 is raised. Therefore, the lifting / lowering cords C1, C2, and C3 function as traction cords that perform traction when the slat 3 and the bottom rail 4 are raised.

  If the pulling-out operation of the lifting / lowering cords C1, C2, and C3 is stopped, the stopper device 15 is activated, and the slat 3 and the bottom rail 4 are prevented from falling by their own weight. Moreover, if the action | operation of the stopper apparatus 15 is cancelled | released, the slat 3 and the bottom rail 4 will descend | fall based on the dead weight.

  In this way, the horizontal blind having a configuration in which the slat 3 is lowered by its own weight by the weight of the bottom rail 4 and the slat 3 by releasing the operation of the stopper device 15 and the slat 3 is lifted by directly pulling the elevating cords C1, C2, and C3. Then, it is preferable to provide the speed adjusting device 6 so that the slat 3 can be lowered smoothly and at an appropriate speed.

  If the speed adjusting device 6 is not installed, if the hand is released from the lifting / lowering cords C1, C2, C3, etc. that are suspended from the cord outlet 14 during the lowering operation, the operation of the stopper device 15 is canceled and the weight of the bottom rail 4 and the slat 3 is reduced. , And the falling sound at that time and the collision sound with the floor surface of the bottom rail 4 cause discomfort to the operator. For this reason, by providing the speed adjusting device 6 as in the present embodiment, the vehicle can be decelerated and lowered only when the vehicle is lowered and the brake force is applied.

  However, in the conventional technique, a constant braking force is applied even when the slat 3 is raised, and the guidance load at that time increases. In addition, since the constant braking force always works, it is not preferable from the viewpoint of quick response regarding the lifting operation.

  For this reason, when the slat 3 is lowered, the speed adjusting device 6 according to the present invention generates a braking force with high friction against the movement of the lifting / lowering cord so that it can be performed smoothly and at an appropriate speed. At the time of ascending, it is configured to be able to be smoothly operated so that the generation of the braking force, which is low friction with respect to the movement of the lifting / lowering cord, becomes almost zero. Hereinafter, the speed adjusting device 6 according to the present invention will be described in detail.

(Speed adjusting device)
FIG. 3 is an exploded perspective view of the speed adjusting device 6 applied to the horizontal blind according to the present embodiment. The speed adjusting device 6 according to the present invention includes a frame 61, a first shaft 62, a rotary damper 63, a second shaft 64, and a movable mechanism 64a.

  In the illustrated example, the first shaft 62 is a roller that is rotatably supported at a fixed position with respect to the frame 61, and the second shaft 64 is a roller that is rotatably supported by the movable mechanism 64a. The movable mechanism 64a is configured to rotatably support the second shaft 64 at the distal ends of a pair of movable arms 641 and 642 whose base ends are pivotally supported with respect to the frame 61. More specifically, the movable mechanism 64a in this example is a pair of long plate-like members each having a shaft hole 647 provided on the distal end side in order to rotatably support a rotating shaft 649 provided at both ends of the second shaft 64. The movable arms 641 and 642 are provided. The proximal ends of the pair of movable arms 641 and 642 are fixed to each other by a round shaft 643, and a torsion spring 644 is mounted on the round shaft 643. The pair of movable arms 641 and 642 has a round shaft. A pair of arm shafts 645 projecting outward on the shaft 643 is provided.

  The frame 61 supports the flat wall portion 611, the U-shaped wall portion 613 having a pair of protruding pieces 612a and 612b having different lengths, and the flat wall portion 611 and the U-shaped wall portion 613 on the base end side. It is comprised from the base end wall part 614 which has the opening part 614a. In addition, it is good also as a shape similar to a pair of protrusion piece 612a, 612b instead of setting it as the flat base end wall part 614. FIG.

  A shaft hole 615 is provided in each of the tip of the protruding piece 612a and the flat wall portion 611. The rotation shaft 622 of the first shaft 62 is rotatably supported in the shaft hole 615 on the protruding piece 612a side. Further, the damper shaft 631 of the rotary damper 63 is rotatably inserted into the shaft hole 615 on the flat wall portion 611 side, and is engaged with the bearing portion 623 of the first shaft 62 so as not to be relatively rotatable. A knurl is formed on the peripheral surface of the first shaft 62.

  The rotary damper 63 functions as a braking means for applying a braking torque with resistance by air or oil to the rotation of the damper shaft 631 to generate a constant braking force. Therefore, the first shaft 62 is supported so as to be rotatable at a fixed position with respect to the frame 61, but a constant braking force is generated in the rotation. The main body of the rotary damper 63 is fixed and held in a case (not shown) that houses the entire speed adjusting device 6 together with the frame 61. If a constant braking force is generated in the rotation of the first shaft 62, instead of using the rotary damper 63, a resistor such as rubber or carbon or a centrifugal brake type governor is used to rotate the first shaft 62. You may comprise as the said braking means by providing to a axis | shaft.

  Further, shaft holes 616 are provided at the tip of the projecting piece 612b and the flat wall portion 611 so as to be substantially parallel to the pair of shaft holes 615 for the first shaft 62, respectively. In the shaft hole 616 on the projecting piece 612b side, an arm shaft 645 projecting outward by a movable arm 642 in the movable mechanism 64a is rotatably supported. In addition, an arm shaft 645 protruding outward by a movable arm 641 in the movable mechanism 64a is rotatably supported in the shaft hole 616 on the flat wall portion 611 side.

  Here, one end 644 a of both ends of the torsion spring 644 engages with the protrusion 646 on the inner surface side of the movable arm 642, and the other end 644 b of the torsion spring 644 is a protrusion on the inner surface side of the flat wall portion 611. The portion 617 is engaged.

  And each other end of the raising / lowering cords C1, C2, and C3 that attach one end to the bottom rail 4 is guided in the head box 1, and through a stopper device 15 as shown in FIG. 6 is inserted between the second shaft 64 and the first shaft 62 supported by the movable mechanism 64 a through the opening 614 a and led out from the cord outlet 14.

  The operation of the speed adjusting device 6 configured as described above will be described with reference to FIG. 4 (a) and 4 (b) schematically show the operation during the pulling operation and the non-pulling operation of the lifting / lowering cord when the slat 3 is lifted / lowered with respect to the speed adjusting device 6 applied to the horizontal blind according to the present embodiment. FIG. The speed adjusting device 6 is provided in the head box 1, and a second shaft 64 supported by the movable mechanism 64a by pulling the lifting / lowering cords C1, C2, C3 in a direction different from the longitudinal direction of the head box 1. Is configured to be separated from the first shaft 62.

  First, as shown in FIG. 4A, when the slat 3 is raised by the pulling operation of the lifting / lowering cords C1, C2, and C3, the pair of movable arms 641 and 642 in the movable mechanism 64a is caused by the pulling operation. The second shaft 64 rotates relative to 61 and rotates. At this time, since the second shaft 64 moves in a direction away from the first shaft 62 and rotates, the lifting and lowering that has been inserted between the second shaft 64 and the first shaft 62 is performed. The cords C1, C2, and C3 move smoothly because they are almost non-contact with the first shaft 62 that is knurled and generates a braking force by the rotary damper 63. Note that the urging force of the torsion spring 644 is acting on the pair of movable arms 641 and 642 in a direction to bring the second shaft 64 closer to the first shaft 62, but the second shaft 64 rotates. The urging force is negligible compared with the tension caused by the weight of the bottom rail 4 and the slat 3 relating to the pulling operation of the lifting / lowering cords C1, C2, and C3.

  On the other hand, as shown in FIG. 4B, when there is no pulling operation of the lifting / lowering cords C1, C2, C3, the urging force of the torsion spring 644 works in a direction to bring the second shaft 64 closer to the first shaft 62. Therefore, the lifting / lowering cords C1, C2, and C3 are constricted between the second shaft 64 and the first shaft 62, resulting in high friction. In particular, when the slat 3 is lowered by its own weight after the lifting operation of the lifting / lowering cords C1, C2, C3 and the stopper device 15 is released, the lifting / lowering cords C1, C2, C3 are moved with respect to the first shaft 62 in which the knurling is engraved. Are brought into contact with each other and narrowed by the second shaft 64, and a braking force is generated by the rotary damper 63 against the movement of the lifting / lowering cords C1, C2, C3.

  The distance d between the second shaft 64 and the first shaft 62 as the urging force of the torsion spring 644 and the moving range of the movable mechanism 64a that cause such an action is the cord of the lifting / lowering cords C1, C2, and C3. With respect to the diameter D, it is defined as 0 ≦ d <D as shown in FIG. Preferably, as shown in FIG. 5B, the moving range is such that the distance d between the second shaft 64 and the first shaft 62 is zero, and more preferably, the distance d is zero. Further, it is preferable to press with a predetermined pressing force by the urging force of the torsion spring 644. The predetermined pressing force at this time is the movement of the lifting / lowering cords C1, C2, and C3 set for deceleration when the lifting / lowering cords C1, C2, and C3 are inserted between the second shaft 64 and the first shaft 62. It may be within a range that allows the rotation of the first shaft 62 corresponding to the speed. Accordingly, the speed adjusting device 6 further has a moving range for pressing the lifting / lowering cords C1, C2, and C3 from a position where the lifting / lowering cords C1, C2, and C3 are sandwiched between the first shaft 62 and the second shaft 64. The torsion spring 644 that is the biasing means is configured to have a biasing force that presses the lifting / lowering cords C1, C2, and C3 in the moving range.

  Thereby, as shown in FIG. 6A, when the slat 3 is lifted based on the pulling operation of the lifting / lowering cords C1, C2, C3 (or the operation cord 7 or the code equalizer 8), the movable mechanism 64a of the speed adjusting device 6 is moved. The distance between the second shaft 64 and the first shaft 62 is separated to be in a released state, that is, a low friction state, and the slat 3 is smoothly raised.

  On the other hand, as shown in FIG. 6B, the pulling operation of the lifting / lowering cords C1, C2, and C3 (or the operation cord 7 and the cord equalizer 8) is stopped, the operation of the stopper device 15 is released, and the slat 3 is lowered by its own weight. Sometimes, the distance between the second shaft 64 and the first shaft 62 of the movable mechanism 64a in the speed adjusting device 6 becomes closer to the urging force of the torsion spring 644 and becomes a narrow pressure state, that is, a high friction state. A braking force is generated by the damper 63, and the descent of the slat 3 is realized smoothly and at an appropriate speed.

  Thereby, the horizontal blind with speed adjustment by the speed adjusting device 6 with improved operability can be realized.

  In FIG. 1 and FIG. 2 described above, a horizontal blind that hangs the lifting / lowering cords C1, C2, and C3 downward from the cord outlet 14 is taken as an example, and therefore the movable mechanism 64a rotates in the vertical direction in FIG. It is preferable to arrange the speed adjusting device 6 so as to be disposed.

  On the other hand, for example, as shown in the partial front view of FIG. 7A, when the cord outlet 14 is provided on the front surface of the head box 1, a simplified top view showing the pulling operation of FIG. As shown in the simplified top view showing the non-pulling operation in FIG. 7C, the speed adjusting device 6 can be arranged so that the movable mechanism 64a rotates in the front-rear direction. Similar actions and effects can be obtained. Accordingly, the speed adjusting device 6 is provided in the vicinity of the cord outlet 14 of the frame (head box 1) for guiding the lifting / lowering cords C1, C2, and C3, and according to the hanging direction of the lifting / lowering cords C1, C2, and C3 from the cord outlet 14 A smooth operation can be suitably realized by arranging at an installation angle.

(Modification)
Next, some typical modifications relating to the speed adjustment device 6 of the above-described embodiment will be described.

  First, FIG. 8A is a perspective view showing a configuration of a modified example of the speed adjusting device 6 according to the present invention. Similar components are denoted by the same reference numerals.

  In the speed adjusting device 6 of the embodiment shown in FIG. 4 described above, the first shaft 62 is rotatably supported with respect to the frame 61 at a fixed position, and the second shaft 64 is supported by the lifting / lowering cords C1, C2, and the frame 61. An example has been described in which C3 is sandwiched and supported so as to be rotatable. On the other hand, in the speed adjusting device 6 of a modified example shown in FIG. 8A, both shafts of the pair of shafts are supported so as to be movable while sandwiching the cord with respect to the frame of the speed adjusting device.

  More specifically, in the speed adjusting device 6 of a modified example shown in FIG. 8A, the first shaft 62 is configured as a roller that applies a predetermined braking torque by the rotary damper 63, and the second shaft 64 is configured. Although configured as a roller that does not apply the predetermined braking torque, the second shaft 64 is the same as the first embodiment shown in FIG. 4 in that the second shaft 64 is rotatably supported with respect to the frame 61 by the movable mechanism 64a. The shaft 62 is also configured to be rotatably supported with respect to the frame 61 by a movable mechanism 62a.

  The movable mechanism 62 a is configured in the same manner as the movable mechanism 64 a shown in FIG. 3, and the second shaft 62 is rotatably supported at the distal ends of a pair of movable arms whose base ends are pivotally supported with respect to the frame 61. It is configured to The proximal ends of the pair of movable arms are fixed to each other by a round shaft, and a torsion spring 644 is mounted on the round shaft. One end of both ends of the torsion spring 644 engages with the protrusion on the inner surface side of one of the movable arms, and the other end of the torsion spring 644 is on the inner surface side of the frame 61 shown in FIG. The protrusion 617 is engaged.

  As an operation of the speed adjusting device 6 of the modified example shown in FIG. 8A, as shown in FIG. 8B, when there is no pulling operation of the lifting / lowering cords C1, C2, C3, both of the movable mechanisms 62a, 64a are both operated. The urging force of the torsion spring 644 acts in a direction to bring the second shaft 64 and the first shaft 62 closer to each other. For this reason, the lifting / lowering cords C1, C2, and C3 are constricted between the second shaft 64 and the first shaft 62, resulting in high friction. In particular, when the slat 3 is lowered by its own weight after the lifting operation of the lifting / lowering cords C1, C2, C3 and the stopper device 15 is released, the lifting / lowering cords C1, C2, C3 are moved with respect to the first shaft 62 in which the knurling is engraved. Are brought into contact with each other and narrowed by the second shaft 64, and a braking force is generated by the rotary damper 63 against the movement of the lifting / lowering cords C1, C2, C3.

  The distance d between the second shaft 64 and the first shaft 62 is the urging force of both torsion springs 644 in the movable mechanisms 62a and 64a that cause such an action and the moving range of the movable mechanisms 62a and 64a. As shown in FIG. 8B, 0 ≦ d <D is defined for the cord diameter D of the lifting cords C1, C2, and C3. Preferably, the moving range is such that the distance d between the second shaft 64 and the first shaft 62 is zero. More preferably, the predetermined range is set by the urging force of the torsion spring 644 while the distance d is zero. It is preferable to press with a pressing force of. The predetermined pressing force at this time is the movement of the lifting / lowering cords C1, C2, and C3 set for deceleration when the lifting / lowering cords C1, C2, and C3 are inserted between the second shaft 64 and the first shaft 62. It may be within a range that allows the rotation of the first shaft 62 corresponding to the speed. Accordingly, the speed adjusting device 6 further has a moving range for pressing the lifting / lowering cords C1, C2, and C3 from a position where the lifting / lowering cords C1, C2, and C3 are sandwiched between the first shaft 62 and the second shaft 64. The torsion spring 644 that is both the urging means in the movable mechanisms 62a and 64a is configured to have an urging force that presses the elevating cords C1, C2, and C3 in the moving range.

  Accordingly, when the pulling operation of the lifting / lowering cords C1, C2, C3 (or the operation cord 7 or the code equalizer 8) is stopped and the operation of the stopper device 15 is released and the slat 3 is lowered by its own weight, the movable mechanism in the speed adjusting device 6 is operated. The distance between the second shaft 64 of 64a and the first shaft 62 becomes close to the urging force of both the torsion springs 644 in the movable mechanisms 62a and 64a to be in a narrow pressure state, that is, a high friction state. The brake force is generated by 63, and the slat 3 is lowered smoothly and at an appropriate speed.

  On the other hand, as shown in FIG. 8C, when the slat 3 is lifted based on the pulling operation of the lifting / lowering cords C1, C2, and C3 (or the operation cord 7 and the cord equalizer 8), the movable mechanism 64a of the speed adjusting device 6 is The distance between the second shaft 64 and the first shaft 62 is separated to enter a released state, that is, a low friction state, and a smooth rise is realized.

  Next, Fig.9 (a) is a perspective view which shows the structure of another modification of the speed adjustment apparatus 6 which concerns on this invention. Similar components are denoted by the same reference numerals.

  In the speed adjusting device 6 of the modification shown in FIG. 9A, in addition to the configuration shown in FIG. 8A, a drive gear 65b that rotates in synchronization with the rotation of the movable mechanism 64a, and a movable mechanism 62a. A driven gear 65a that rotates in synchronism with the rotation is provided, and the driven gear 65a is configured to mesh with the drive gear 65b. In this example, the driven gear 65a shows an example in which the number of teeth of the driving gear 65b is the same as a predetermined number, but any number of teeth different from each other can be used.

  As an operation of the speed adjusting device 6 of the modification shown in FIG. 9A, as shown in FIG. 9B, when there is no pulling operation of the lifting / lowering cords C1, C2, C3, both of the movable mechanisms 62a, 64a The urging force of the torsion spring 644 acts in a direction to bring the second shaft 64 and the first shaft 62 closer to each other. For this reason, the lifting / lowering cords C1, C2, and C3 are constricted between the second shaft 64 and the first shaft 62, resulting in high friction. In particular, when the slat 3 is lowered by its own weight by releasing the operation of the stopper device 15 after the lifting operation of the lifting cords C1, C2, C3, the lifting cords C1, C2, C3 Are brought into contact with each other and narrowed by the second shaft 64, and a braking force is generated by the rotary damper 63 against the movement of the lifting / lowering cords C1, C2, C3.

  Accordingly, when the pulling operation of the lifting / lowering cords C1, C2, C3 (or the operation cord 7 or the code equalizer 8) is stopped and the operation of the stopper device 15 is released and the slat 3 is lowered by its own weight, the movable mechanism in the speed adjusting device 6 is operated. The distance between the second shaft 64 of 64a and the first shaft 62 becomes close to the urging force of both the torsion springs 644 in the movable mechanisms 62a and 64a to be in a narrow pressure state, that is, a high friction state. The brake force is generated by 63, and the slat 3 is lowered smoothly and at an appropriate speed.

  On the other hand, as shown in FIG. 9 (c), when the slat 3 is lifted based on the pulling operation of the lifting / lowering cords C1, C2, C3 (or the operation cord 7 or the cord equalizer 8), The distance between the second shaft 64 and the first shaft 62 is synchronously separated from each other to be in a released state, that is, a low friction state, and a smooth rise is realized.

  In the speed adjusting device 6 of the embodiment shown in FIG. 4 described above, the first shaft 62 is rotatably supported at a fixed position with respect to the frame 61, and the second shaft 64 is supported by the lifting / lowering cord C 1 with respect to the frame 61. Although an example has been described in which C2 and C3 are sandwiched and supported so as to be rotatable, as shown in FIG. 10 (a), the second shaft 64 is sandwiched and moved by the lift cords C1, C2 and C3 with respect to the frame 61. Although possible, it may be configured as a non-rotatable bar.

  Similarly, in the speed adjusting device 6 of the embodiment shown in FIG. 8A (or FIG. 9A) described above, the fourth shaft 64 is attached to the frame 61 as shown in FIG. The lift cords C1, C2, and C3 can be sandwiched and moved, but may be configured as a non-rotatable bar.

  Further, as shown in FIG. 10C, the first shaft 62 is supported as a simple roller (or a bar) at a fixed position with respect to the frame 61, and the second shaft 64 is knurled on the peripheral surface. As the provided roller, it is possible to adopt a form in which a braking force is generated by the rotary damper 63.

  In the above-described example, the horizontal blind has been described as the shielding device in which the shielding material descends its own weight. However, it goes without saying that the speed adjusting device 6 according to the present invention can be similarly applied to a shielding device such as a pleated screen or a roman shade. is there.

  Furthermore, the speed adjusting device 6 according to the present invention can be similarly applied to a shielding device that automatically moves the shielding material in one direction by an urging force such as a spring, not only when the shielding material falls by its own weight.

  For example, FIGS. 11A and 11B show the speed adjusting device 6 applied to the accordion curtain 100 configured as a shielding device according to an embodiment of the present invention, respectively, when the shielding material 103 is pulled (opened). FIG. 2 is a schematic front view showing the operation during operation) and during non-pull operation (close operation).

  The accordion curtain 100 includes a hanger rail 101, a moving rod 102, a fixed rod 104, two front and rear shielding materials 103 attached to the moving rod 102 and the stationary rod 104 at both left and right sides, and two front and rear shielding materials. A plurality of runners (not shown) that suspend and support 103 on the hanger rail 101, a leading runner 105 that can be moved on the hanger rail 101 and installed on the top of the movable rod 101, The operation unit 106 fixed to the right end side, the operation cord 107, the traction cords C1 and C2, the code equalizer 108, the support unit 109 fixed to the left end side of the hanger rail 101, the operation grip 110, and the turning pulley The left and right ends are attached to the unit 111, the moving rod 102, and the fixed rod 104, and are expanded and contracted in a pantograph shape. A telescopic mechanism 112 functioning as a framework, pulley units 113 and 114 provided at two positions above and below the center of the fixed rod 104, a stopper device 115 provided on the fixed rod 104, and the speed adjusting device 6 according to the present invention, Is the main component.

  The hanger rail 101 is a substantially rectangular tube-shaped member that is open at the lower end side so that a plurality of runners (not shown) that support the suspension of the shielding material 103 and the leading runner 104 can move. The hanger rail 101 is fixed to the ceiling surface via a bracket (not shown).

  The operation unit 106 is fixed to the right end side of the hanger rail 101, and the speed adjusting device 6 according to the present invention is installed therein.

  The moving rod 102 is a frame-like member extending in the vertical direction, and is attached to the right end portions of the two front and rear shielding materials 103.

  The fixing rod 104 is fixed to the left wall surface, and the left end portions of the two front and rear shielding materials 103 are attached.

  The code equalizer 108 has one end of the operation cord 107 attached to the right end side thereof, and one end of each of the two traction cords C1 and C2 attached to the left end side thereof, and is provided so as to be movable in the hanger rail 2. It is done.

  The turning pulley 111 is provided in a support unit 109 fixed to the left end side of the hanger rail 101. The two traction cords C1 and C2 having one end attached to the code equalizer 108 are turned downward through the turning pulley 111 inside the two front and rear shielding members 103, and after passing through the stopper device 115, The traction cord C1 is turned from the left end to the right end substantially parallel to the longitudinal direction of the hanger rail 2 via the pulley unit 113, and the traction cord C2 is changed from the longitudinal direction of the hanger rail 2 via the pulley unit 114. It turns from the left end to the right end substantially in parallel. Thereafter, the other ends of the two traction cords C1 and C2 are attached to the moving rod 102.

  The other end of the operation cord 107 having one end attached to the cord equalizer 108 is guided to the right in the hanger rail 107, and is hung downward through the speed adjusting device 6 according to the present invention in the operation unit 106 to be externally provided. And is attached to the operation grip 110.

  Inside the two front and rear shielding materials 103, there is provided an expansion / contraction mechanism 112 that functions as a framework that is attached to the movable rod 102 and the fixed rod 104 at both left and right ends and expands and contracts in a pantograph shape. In particular, the expansion / contraction mechanism 112 is provided with a plurality of coil springs (not shown) that urge the shielding member 103 in the closing direction.

  Therefore, as shown in FIG. 11A, when the pulling operation by the operation grip 110 is performed to move the moving rod 102 in the opening direction (leftward in the drawing), the speed adjustment device 6 according to the present invention is as shown in FIG. As in the example shown in FIG. 5, the distance between the second shaft 64 and the first shaft 62 in the movable mechanism 64a is separated to be in a released state, that is, a low friction state, and a smooth movement is realized. At this time, the urging force is stored in the plurality of coil springs by folding the telescopic mechanism 112. If the operation grip 110 is released in this state, when the stopper device 115 operates to stop the movement of the traction cords C1 and C2, the shielding member 103 is kept open at the stop position of the moving rod 102. The

  On the other hand, when releasing the operation grip 110, when the stopper operation that allows the movement of the traction cords C1 and C2 is released by the stopper device 115, as shown in FIG. Due to the biasing force of the coil spring, the moving rod 102 automatically moves to the fully closed state. At this time, the distance between the second shaft 64 and the first shaft 62 in the movable mechanism 64a in the speed adjusting device 6 becomes closer to the urging force of the torsion spring 644 and becomes a narrow pressure state, that is, a high friction state. A brake force is generated by the rotary damper 63, and the movement of the shielding material 103 is realized smoothly and at an appropriate speed.

  Therefore, by moving the cord for moving the shielding material, the mechanism is automatically operated to adjust the speed in one direction of the opening / closing direction of the shielding material through the release of the operation of the stopper device. The speed adjusting device 6 according to the present invention can be applied to any shielding device that can be opened and closed.

  The present invention has been described above with reference to specific embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the technical concept thereof. For example, in the example of the embodiment described above, the example in which the torsion spring 644 is used as the biasing force in the speed adjusting device 6 has been described. However, the biasing force is generated by a leaf spring, a telescopic spring, etc., and the same action and effect are generated. It can also be configured. As described above, instead of using the air or oil type rotary damper 63 as a braking means for generating a constant braking force, a resistor such as rubber or carbon, or a centrifugal brake type governor is used. It can comprise as the said braking means by providing to the rotating shaft of any one or both of the axis | shaft 64 and the 1st axis | shaft 62.

  In the example of the embodiment described above, the example in which the speed adjusting device 6 according to the present invention is applied to the moving lifting / lowering cord or the operation cord as the cord related to the pulling operation has been described. The speed adjusting device 6 according to the present invention can also be applied to a cord that is connected to a speed conversion mechanism and moves in conjunction with the speed conversion mechanism.

  According to the present invention, the speed adjusting device with improved operability can be obtained, which is useful for the use of a shielding device with speed adjustment.

1 Headbox C1, C2, C3 Lift code (traction code)
3 Shielding material (slats)
4 bottom rail 5 support member 6 speed adjusting device 7 operation cord 8 cord equalizer 14 cord outlet 61 frame 62 first shaft 62a movable mechanism 63 braking means (rotary damper)
64 Second shaft 64a Movable mechanism 65a Driven gear 65b Drive gear 614a Opening 641, 642 Movable arm 644 Energizing means (torsion spring)

Claims (10)

By moving the cord for moving the shielding material, it is possible to open and close the shielding material with mechanical automatic operation in one direction among the opening and closing directions of the shielding material and manual operation in the other direction after the operation of the stopper device is released. A shielding device comprising a speed adjusting device that limits the moving speed of the cord and brakes the moving speed of the shielding material in one direction to a predetermined value or less,
The speed adjusting device includes:
A pair of shafts capable of sandwiching the cord;
Braking means for rotating either one or both of the pair of shafts and applying a predetermined braking torque;
Biasing means for biasing with a predetermined biasing force so that the cord is sandwiched and pressed by the pair of shafts;
When the cord is sandwiched between the pair of shafts, the predetermined braking torque is applied to limit the moving speed of the cord, and one of the pair of shafts resists the predetermined biasing force during the manual operation. The shielding apparatus is configured to be movable in a direction away from the other axis.   2. The shielding device according to claim 1, wherein any one of the pair of shafts is supported at a fixed position with respect to a frame of the speed adjusting device.   2. The shielding device according to claim 1, wherein both of the pair of shafts are supported so as to be able to sandwich and move the cord with respect to a frame of the speed adjusting device.   The shielding apparatus according to claim 3, wherein both of the pair of shafts are configured to move in a direction in which they are separated in synchronization with each other against the predetermined biasing force.   The one of the pair of shafts is configured as a roller that applies a predetermined braking torque by the braking means, and the other shaft is configured as a roller that does not apply the predetermined braking torque. The shielding apparatus as described in any one of 1-4.   The one of the pair of shafts is configured as a roller that applies a predetermined braking torque by the braking means, and the other shaft is configured as a bar that does not apply the predetermined braking torque. The shielding apparatus as described in any one of 1-4.   The speed adjusting device is configured to further include a moving region that presses the cord by the predetermined urging force from a position where the cord is sandwiched between the pair of shafts. The shielding apparatus as described in any one of 1 to 6.   The speed adjusting device is provided in a frame that guides the cord, and one of the pair of shafts is separated from the other by pulling the cord in a direction different from the guide direction in the frame. The shielding device according to any one of claims 1 to 7, wherein the shielding device is configured to be configured.   The shaft that is movable in the direction in which one of the pair of shafts moves away from the other shaft during the manual operation is a pair of shafts that are pivotally supported on the base end side with respect to the frame of the speed adjusting device. The shielding device according to claim 1, wherein the shielding device is rotatably attached to a distal end side of the movable arm.   The speed adjusting device is provided in the vicinity of a cord outlet of a frame body that guides the cord, and is arranged at an installation angle corresponding to a hanging direction of the cord from the cord outlet. The shielding apparatus as described in any one of 1 to 9.