JPS6156747B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cord guiding device for a horizontal blind, which allows raising and lowering of a blind bottom rail and tilting of a slat from one place.

Conventional devices that have been proposed as blinds that can be tilted and raised and lowered in one place, such as the blind described in U.S. Pat. A worm wheel fixed to the shaft is engaged, a hollow operating rod is connected to the hollow worm via a hollow hook joint, a brake equipped with a spring is attached to the lower end of the hollow operating rod, and a lifting cord is connected to the hollow worm from the outside of the top rail. The cord is sequentially passed through a worm, a hollow hook-type joint, and a hollow operating rod, and then pulled out, and the lifting cord is locked by pressing against the inner peripheral surface of the hollow operating rod with a brake shoe. However, the overall width of this blind is much longer than the length of the slats, so in addition to the problem of not being able to install slats that are the same length as the internal width of openings such as windows and doors in buildings, this blind has Since the lifting cord is stretched along the upper surface of the top rail, there are problems in that the top rail cannot be directly attached to the ceiling and the appearance is not good.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a device which solves the above-mentioned problems in blinds that can perform both raising and lowering of the bottom rail and tilting of the slats at one location.

In order to achieve the above object, the gist of the present invention is that a block is installed inside the top rail, a hollow shaft that projects diagonally downward from the top rail is supported on the block, and the block is orthogonal to the tilting axis of the slat.
A transmission device is provided to transmit rotation from the hollow shaft to the tilting shaft, and a hollow operating rod is connected to the hollow shaft via a hollow swivel joint, and a bottom rail lifting cord is connected to the hollow shaft, hollow swivel joint, and In a horizontal blind that is sequentially passed through a hollow operating rod, the hollow shaft is arranged in a block such that the opening at its upper end is lower than the tilting shaft, and the guide roll is inserted between the tilting shaft and the hollow shaft and the tilting shaft passes through its axis. The vertical axis is placed in the same block so that the plane parallel to the top rail is perpendicular to the hollow shaft, and the lifting cord stretched inside the top rail is connected to the inside of the hollow shaft via the guide roll without raising it higher than the tilting axis. It's about guiding you in the right direction. The hollow flexible joint mentioned here includes hollow hook-shaped joints, coil joints, tube joints, and the like.

The apparatus of the present invention will be explained based on embodiments shown in the drawings. As shown in FIG. 1, a hollow operating rod 3 that controls the elevation of the slat 2 descends from one end of the top rail 1, and a cord 5 that controls the elevation and descent of the bottom rail 4 passes through the rod 3 and extends from its lower end. Droop. Therefore, all operations of the blinds can be performed in one place. The left and right width of the top rail 1 is approximately the same as the left and right width of the slat 2, and the operating rod 3 hangs down from the front surface of the slat 2.

As shown in FIGS. 2 and 3, a block 6 is attached to the end of the top rail 1.
A hexagonal rod-shaped tilting shaft 7 extending in the longitudinal direction of the top rail 1 is supported on the top rail 1 . A hollow shaft 8, which is perpendicular to the tilting shaft 7 and projects diagonally downward from the top rail 1, is similarly supported by the block 6. A gear 10 that meshes with a face gear 9 fixed to a tilting shaft 7 is attached to the upper end of a hollow shaft 8. The upper end pipe 12 of the operating rod is connected to the hollow shaft 8 via a coil joint 11 with a tube. Operation rod 3 is upper and lower pipe 1
It has a double structure with 2 and 13 telescopic extensions, and its length can be freely adjusted with a screw 14.

Although not shown, a string 20 for adjusting the tilting of the slat 2 is wound around a drum integral with the tilting shaft 7, and tilts the slat 2 back and forth in accordance with the direction of rotation of the tilting shaft 7. On the other hand, the cord 5 extends upward between the bottom rail 4 and the slat 2, then enters the top rail and passes under the tilting shaft 7.
Next, the cord 5 is passed through a guide roll 16 provided in the block 6 and into a hollow shaft 8 whose opening center is located at a lower position of the tilting shaft 7.
is located between the tilting shaft 7 and the hollow shaft 8 , and a plane parallel to the tilting shaft 7 and including the axis of the guide roll 16 is orthogonal to the hollow shaft 8 . Furthermore, the cord 5 has a hollow shaft 8,
It sequentially passes through the coil joint 11 and the operating rod 3, and is pulled out downward through a hole in a locking fitting 17 detachably attached to the bottom of the grip 15, and reaches a knob 18. An inner circumferential step 24 is formed in the upper part of the grip 15, and a compression coil spring 25 is disposed between the inner circumferential step and the thick walled portion 23 at the lower end of the pipe. Since the upper part of the locking metal fitting 17 is formed into a plug shape, when the spring 25 pushes up the grip 16, the locking metal fitting 17 enters the hollow part of the pipe 13 and clamps and locks the cord 5. Also, the grip 15 resists the elasticity of the spring 25.
When pushed down, the locking metal fitting 17 falls out of the hollow part of the pipe 13, so the cord 5 is released from the lock and can freely move up and down. The hollow shaft 8 may be made to protrude substantially horizontally from the front surface of the top rail 1 instead of diagonally downward. In some cases, the guide roll 16 may be a fixed guide.

In the embodiment shown in FIG. 4, the hollow shaft 8 and the upper pipe 12 of the operating rod 3 are connected via a hollow hook type joint 41, and bevel gears or pin wheels 42, 43 are used to transmit rotation from the hollow shaft 8 to the tilting shaft 7. are using. Although the hook-shaped joint 41 is larger in shape than the coil joint 11 of the previous embodiment, there is no deviation in rotation transmission due to elastic deviation.

In the embodiment shown in FIG. 5, a spur gear 51 is attached to the tilting shaft 7, a relay spur gear 52 that meshes with the spur gear 51 is supported on the block 6, and the spur gear 52 and the hollow shaft 8 are connected to a coil joint. 53. The cord 5 enters the hollow shaft 8 through the coil joint 53 from the hollow part of the spur gear 52 which also serves as a guide roll. The rotation of the hollow shaft 8 is transmitted to the tilting shaft 7 via a coil joint 53 and spur gears 52 and 51.

Although not shown, instead of the coil joint 53, a bevel gear or a helical gear may be fixed to the shaft of the relay spur gear 52 and the hollow shaft 8 to transmit rotation between the two. Furthermore, as shown in FIG. 9, a relay helical gear 54 is supported parallel to the tilting shaft 7 of the block 6 at a different level, and the helical gear is engaged with a hollow helical gear 55 fixed to the hollow shaft 8, thereby connecting the tilting shaft 7 and the relay helical gear 54. They may be connected by a hollow flexible joint such as a tube joint 56. It goes without saying that the helical gears 54 and 55 can be replaced with bevel gears.

In the embodiment shown in FIG. 6, spur gears 61 and 62 are fixed to the tilting shaft 7 and the hollow shaft 8, respectively, and the two gears are connected via a rack body 63 having racks on the top and side surfaces. Therefore, the rotation of the hollow shaft 8 is transmitted to the tilting shaft 7 via the spur gear 61 and the rack body 63. The rack body 63, which is a gear with an infinite radius of curvature and is slidably supported on the block 6, may be a gear with a finite radius of curvature, that is, an annular internal gear, and its outer peripheral portion may be rotatably supported on the block 6.

In the embodiment shown in FIG. 7, friction wheels 71 and 72 are fixed to the tilting shaft 7 and the hollow shaft 8, respectively.
A compression spring 73 is disposed in the hollow bearing portion of the block 6 to press the friction wheel 71 against the friction wheel 72. Therefore, the rotation of the hollow shaft is transmitted to the tilting shaft 7 via the friction wheels 71, 72.

Next, the operation of the apparatus of the present invention will be explained.
All operations of the blind can be carried out on the lower side of the operating rod 3. The operating rod 3 is connected to a hollow shaft 8 projecting obliquely from the top rail 1 via a hollow flexible joint 11 or 41 so as to be able to pivot about it, and a grip 15 is keyed to the operating rod 3, so that the grip When 15 is turned left and right, the operating rod 3 and the hollow adjustable joint 11 or 41 are rotated, and the hollow shaft 8 is accordingly turned left and right. The rotation of the hollow shaft 8 causes the tilting shaft 7 to rotate back and forth, winding up one side of the string 20 and unwinding the other, thereby tilting the slat 2 back and forth.
When the rotation of the grip 15 is stopped, the slat 2 stops at that angle of inclination, so that the desired angle of inclination of the slat can be easily obtained.

The vertical movement of the blind, that is, the vertical movement of the bottom rail 4, is carried out by adjusting the cord 5 hanging from the operating rod 3. Connect the grip 15 to the coil spring 25
When you push down against the elasticity of the locking metal fitting 17
exits from the hollow part of the pipe 13, freeing the cord 5 held between them. As a result, when the cord 5 is released, the bottom rail 4 descends under its own weight and the cord 5 enters the operating rod 3. Conversely, when the cord 5 is pulled, the bottom rail 4 is pulled up and raised. When the bottom rail 4 reaches the desired position and the grip 15 is loosened, the grip 15 is pushed up by the repulsive force of the spring 25 and the locking metal fitting 17
is again fitted into the hole of the pipe 13 and locks the cord 5, so the bottom rail 4 stops at that position.

Two or three cords pass through the operating rod, so if the cords are bunched together, when the locking fitting on the operating rod is pushed in, the locking fitting will lock all the cords equally. I can't. As a result, some of the cords may shift and the bottom rail may tilt. To prevent this, the locking fitting 80 of FIG. 8 has six symmetrical holes 82 in the bottom 81.
with a groove 8 continuing from the hole 82 in the conical plug part 83.
There are 4. When two or three cords are inserted symmetrically into the holes 82 and grooves 84, the cords can be separated one by one to prevent them from shifting. Therefore, when the locking fitting 80 is pushed into the operating rod 3, the plug portion 83 evenly presses and locks all the cords against the inner wall of the operating rod 3. In this way, when the locking fitting shown in FIG. 8 is used, there is no possibility that the bottom rail will tilt. The lower end of the cord 5 may be connected to the bottom rail as in the conventional manner, or it may be hung down with a knob 18 attached thereto, as shown in the embodiment. Furthermore, the knob 18 can be hung on the operating rod 3 with a hook 19 whose position can be adjusted elastically.

As mentioned above, when the device of the present invention is installed on a blind that allows the raising and lowering of the blind and the tilting of the slats from one place, unlike the conventional method in which the raising/lowering cord is stretched over the top surface of the top rail, the raising/lowering cord is attached to the top rail. Since it is installed at a lower position than the internal tilt axis, the top surface of the top rail can be attached directly to the ceiling. In addition, the lifting cord enters the hollow shaft in the axial direction through the guide roll, and does not slide at right angles to the hollow shaft even when it rotates, so the lifting cord suffers little wear and tear and can withstand long-term use.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a blind according to an embodiment of the present invention, Fig. 2 is a side sectional view of the main part of the blind shown in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4. 7 to 9 are views corresponding to FIG. 3 of another embodiment, and FIG. 8 is an enlarged perspective view of a locking fitting of another embodiment. 1: Top rail, 2: Slat, 3: Operation rod, 4: Bottom rail, 5: Lifting operation cord,
6: Block, 7: Tilting shaft, 8: Hollow shaft, 9: Face gear, 10: Gear, 11: Coil joint, 12, 13: Upper and lower pipes, 14: Adjusting screw,
15: Grip, 16: Guide roll, 17: Locking metal fitting, 19: Hook, 23: Inner circumference step, 24: Outer circumference step, 25: Compression spring, 41: Hollow hook type joint, 42, 43, 51, 52, 61, 62: Gear, 53: Coil joint, 63: Rack body,
71, 72: Friction wheel, 80: Locking metal fitting, 81: Same bottom, 82: Same hole, 83: Same thread, 84: Same groove.

Claims (1)

[Scope of Claims] 1. A top rail, a block provided on the top rail, a tilting shaft bearing on the top rail, a hollow shaft bearing on the block and protruding diagonally downward from the top rail, and the tilting shaft. a rotation transmission mechanism provided between the top rail and the hollow shaft, a hollow flexible joint and a hollow operating rod sequentially connected to the hollow shaft, and a lifting cord passed through them from inside the top rail and pulled out from the hollow operating rod. In the horizontal blind, the hollow shaft is arranged in the block so that the center of the upper end thereof is located lower than the tilting shaft, and a guide roll is arranged between the tilting shaft and the hollow shaft with the axis of the guide roll. The block is arranged such that a plane parallel to the tilting axis including the center is orthogonal to the hollow shaft, and the lifting cord is axially directed from a position lower than the tilting axis to the hollow shaft via the guide roll. A horizontal blind cord guiding device characterized by guiding the user to enter the blind cord. 2. The horizontal blind cord guide device according to claim 1, characterized in that the guide roll is provided as a rotating body. 3. The horizontal blind cord guide device according to claim 1, characterized in that the guide roll is provided as a fixed body. 4. The horizontal blind cord guide device according to claim 1, characterized in that the guide roll is provided as a hollow spur gear of a rotation transmission mechanism between the tilting shaft and the hollow shaft.