JP4087737B2 - Shielding material lifting device for solar radiation shielding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shielding material lifting / lowering device that winds or unwinds a lifting / lowering cord and raises / lowers a shielding material such as a slat or curtain fabric in a solar radiation shielding device such as a horizontal blind, a raised curtain, and a pleated curtain.
[0002]
[Prior art]
As one type of horizontal blind, a lifting cord winding device provided in the head box enables the lifting cord to be wound around the winding shaft, or the lifting cord is unwound from the winding shaft so that the slat can be lifted and lowered. is there.
[0003]
In order to wind up the lifting / lowering cord without overlapping with the outer peripheral surface of the winding shaft, the winding cord is configured to move in the axial direction while rotating the winding shaft during the winding operation of the lifting / lowering cord, or the winding shaft from one of them. There is a taper that gradually decreases in diameter toward the other side.
[0004]
When winding the lifting / lowering cord on the taper-shaped winding shaft, the end of the lifting / lowering cord is attached to the small diameter side of the winding shaft. When the lifting / lowering cord is wound on the large diameter side of the winding shaft, the lifting / lowering cord that has been wound up by the load acting on the lifting / lowering cord is already wound around the circumferential surface of the winding shaft. Are sequentially pushed to the small diameter side of the take-up shaft.
[0005]
On the large diameter side of the winding shaft, the outer peripheral surface is smoothly formed, and the lifting cord is smoothly moved to the small diameter side. Moreover, since the raising / lowering cord which moved to the small diameter side will be in the slack state with respect to the winding shaft, it moves more smoothly.
[0006]
By such an operation, the lifting / lowering cord is wound without overlapping on the circumferential surface of the winding shaft.
The lifting cord winding device as described above is disclosed in Patent Document 1.
[0007]
[Patent Document 1]
JP 2000-179261 A
[0008]
[Problems to be solved by the invention]
In the lifting cord winding device as described above, the taper formed on the winding shaft is a taper with a fixed inclination.
[0009]
In such a configuration, when the winding amount of the lifting / lowering cord on the winding shaft increases as the lifting / lowering cord is wound around the winding shaft, the lifting / lowering cord that is newly wound on the small-diameter side of the winding shaft. The amount of the lifting cord to be moved increases.
[0010]
At this time, as the lifting / lowering cord is wound around the winding shaft, the load acting on the lifting / lowering cord increases. However, if the inclination of the taper is small, the lifting / lowering cord already wound on the winding shaft is removed from the winding shaft. It cannot be reliably moved to the small diameter side. Therefore, the lifting / lowering cord may be wound in a state of being overlapped on the winding shaft.
[0011]
On the other hand, when the inclination of the taper is large, it is easy to move the lifting / lowering cord that has already been wound to the smaller diameter side of the winding shaft during the winding operation of the lifting / lowering cord. The slack of the code increases.
[0012]
Therefore, when unwinding the lifting cord from the winding shaft and lowering the slats, when unwinding the slack portion of the lifting cord, the lifting cord suddenly descends due to the load acting on the lifting cord, and the slats are smooth. There is a problem that the lowering operation is hindered.
[0013]
In order to solve such problems, it is necessary to optimally set the taper inclination according to the winding amount of the lifting / lowering cord. However, the taper inclination is adjusted according to the height of the horizontal blind. There is a problem that this is extremely complicated.
[0014]
SUMMARY OF THE INVENTION An object of the present invention is to provide a lifting / lowering cord winding device that winds a lifting / lowering cord around a taper-shaped winding shaft, and can lift and lower the lifting / lowering cord smoothly while allowing the lifting / lowering cord to be wound without overlapping the winding shaft. The object is to provide a cord winding device.
[0015]
[Means for Solving the Problems]
In claim 1, a winding shaft whose diameter changes in a taper shape is rotatably supported by a support member, and a lifting / lowering cord is wound around a large diameter side of the winding shaft and sequentially moved toward a small diameter side, or the winding by unwinding the lift cords from the shaft, the shielding material lifting apparatus solar shading device for lifting the shielding material, the the take-up shaft, the inclination of the taper in accordance with the increasing size of the winding of the lift cords with inclination adjustment means for automatically increasing size.
[0016]
According to a second aspect of the present invention, the inclination adjusting means includes a split groove that is formed in the axial direction of the winding shaft that is formed in a cylindrical shape and opens to the small diameter side, and the winding shaft is supported on the large diameter side. The member was cantilevered.
[0017]
In Claim 3, the said dividing groove was provided with two or more.
According to a fourth aspect of the present invention, the winding shaft increases in thickness toward the small diameter side.
According to a fifth aspect of the present invention, on the winding shaft, a lifting / lowering cord attaching member for attaching an end portion of the lifting / lowering cord is supported so as to be movable in the axial direction.
[0018]
According to a sixth aspect of the present invention, the lifting / lowering cord attaching member is supported by a guide groove formed in parallel to the split groove.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the lifting / lowering cord winding device of the horizontal blind (sunlight shielding device) shown in FIG. 1, a support member 2 is fixed in the head box 1, and the winding shaft 3 is rotatably supported by the support member 2.
[0020]
The winding shaft 3 is formed in a cylindrical shape, and a flange portion 4 is formed at one end thereof. Further, a first cap 5 is fitted to the inner peripheral portion of the flange portion 4 so as not to be relatively rotatable.
[0021]
That is, as shown in FIG. 4, a ridge 6 is formed on the outer peripheral portion of the first cap 5, and the ridge 6 is fitted to a concave strip 7 formed on the inner peripheral portion of the flange portion 4. The relative rotation is impossible.
[0022]
A second cap 8 is attached to the other end of the winding shaft 3. As shown in FIG. 3, the take-up shaft 3 is rotatably supported by the support member 2 via first and second caps 5 and 8.
[0023]
Further, the shaft portion 9 of the second cap 8 inserted into the winding shaft 3 is formed with a diameter smaller than the inner diameter of the winding shaft 3, and the shaft portion 9 and the inner peripheral surface of the winding shaft 3. A predetermined clearance is secured between them.
[0024]
Therefore, the winding shaft 3 is cantilevered by the support member 2 via the first cap 5.
Hexagonal holes 10 and 11 are formed in the center portions of the first and second caps 5 and 8, respectively, and a hexagonal rod-like drive shaft 12 is fitted into the hexagonal holes 10 and 11 so as not to be relatively rotatable.
[0025]
The drive shaft 12 is rotationally driven by an operating device. Therefore, when the drive shaft 12 is rotated, the winding shaft 3 is rotated via the first cap 5.
[0026]
The end portion of the lifting / lowering cord 13 for lifting and lowering the slat (shielding material) is fixed to the end portion of the winding shaft 3 on the second cap 8 side, and is provided on the support member 2 in the vicinity of the flange portion 4. The guide hole 14 guides the head box 1 downward.
[0027]
When the winding shaft 3 is rotated in the winding direction of the lifting / lowering cord 13, the lifting / lowering cord 13 is wound around the winding shaft 3 and the slat is pulled up, and the winding shaft 3 is unwound in the rewinding direction of the lifting / lowering cord 13. , The lifting / lowering cord 13 is rewound from the winding shaft 3 so that the slats are lowered.
[0028]
A split groove 15 is formed in the winding shaft 3 from the other end to the intermediate portion of the flange portion 4. When the lifting / lowering cord 13 is wound around the winding shaft 3, the split groove 15 is tightened by the load acting on the lifting / lowering cord 13, and the other end side of the winding shaft 3 is reduced in diameter. It becomes a taper shape in which a diameter becomes small toward an edge part.
[0029]
Next, the operation of the lifting / lowering cord winding device configured as described above will be described.
FIG. 2 shows a state where all the lifting / lowering cords 13 are rewound. In this state, when the winding shaft 3 is rotated in the winding direction of the lifting / lowering cord 13 and the slat is pulled up, the lifting / lowering cord 13 is wound along the flange portion 4 of the winding shaft 3 and has already been wound. The raising / lowering cord 13 is sequentially pushed toward the other end side of the winding shaft 3.
[0030]
As the lifting / lowering cord 13 is wound around the winding shaft 3, the winding shaft 3 is tightened by the load acting on the lifting / lowering cord 13, and the split groove 15 is gradually tightened from the other end side of the winding shaft 3.
[0031]
Then, the winding shaft 3 is reduced in diameter toward the other end side and becomes tapered, and the lifting / lowering cord 13 wound around the winding shaft 3 easily moves to the other end side of the winding shaft 3. As the winding amount of the lifting / lowering cord 13 increases, the load acting on the lifting / lowering cord 13 increases, the tightening of the split groove 15 increases and the inclination of the taper increases, so that the lifting / lowering cord 13 moves smoothly. Done.
[0032]
When the winding shaft 3 is rotated in the rewinding direction of the lifting / lowering cord 13 to lower the slat, the lifting / lowering cord 13 is sequentially rewound from one end side of the winding shaft 3. Since the load acting on the lifting / lowering cord 13 decreases as the lifting / lowering cord 13 is rewound, the tightening of the split groove 15 is gradually released, and the taper inclination becomes smaller.
[0033]
Then, the slack of the lifting / lowering cord 13 moving to the other end side of the winding shaft 3 is absorbed, so that discontinuous rewinding of the lifting / lowering cord during the slat lowering operation is prevented. In the lifting / lowering cord winding device configured as described above, the following operational effects can be obtained.
(1) When the lifting / lowering cord 13 is wound around the winding shaft 3 and the slat is pulled up, the lifting / lowering cord 13 can be wound without overlapping the winding shaft 3 by rotating the winding shaft 3.
(2) As the winding amount of the lifting / lowering cord 13 increases, the taper-shaped inclination of the winding shaft 3 can be automatically increased. Therefore, since the lifting / lowering cord 13 wound around the winding shaft 3 can be smoothly moved to the other end side of the winding shaft 3, the lifting / lowering cord 13 can be wound without overlapping the winding shaft 3.
(3) When the lifting / lowering cord 13 is rewound from the winding shaft 3, the taper-shaped inclination of the winding shaft 3 can be automatically reduced as the lifting / lowering cord 13 is rewound. Therefore, the slack of the lifting / lowering cord 13 can be absorbed and the lifting / lowering cord 13 can be smoothly rewound.
(Second embodiment)
FIG. 5 shows a second embodiment. The winding shaft 3 of this embodiment is configured such that the thickness of the cylindrical portion is gradually increased toward the other end side. With such a configuration, one end of the winding shaft 3 can be more easily bent, and the winding shaft 3 can be quickly bent into a tapered shape when the winding of the lifting / lowering cord 13 is started.
(Third embodiment)
FIG. 6 shows a third embodiment. In this embodiment, the split groove 15 is provided at two locations symmetrical with respect to the center. With such a configuration, the taper-shaped inclination of the winding shaft 3 can be further increased as compared with the second embodiment.
(Fourth embodiment)
FIG. 7 shows a fourth embodiment. In this embodiment, three split grooves 15 are provided at equal intervals in the circumferential direction of the winding shaft 3. With such a configuration, the taper-shaped inclination of the winding shaft 3 can be further increased as compared with the third embodiment.
(Fifth embodiment)
FIG. 8 shows a fifth embodiment. In this embodiment, four split grooves 15 are provided at equal intervals in the circumferential direction of the winding shaft 3. With such a configuration, the taper-shaped inclination of the winding shaft 3 can be further increased as compared with the fourth embodiment.
(Sixth embodiment)
9 to 12 show a sixth embodiment. In this embodiment, a lifting / lowering cord attaching member 16 is movably supported in the split groove 15, and an end portion of the lifting / lowering cord 13 is attached to the lifting / lowering cord attaching member 16.
[0034]
As shown in FIG. 10, the lifting / lowering cord attaching member 16 is supported so as to be movable along the split groove 15, and the lifting / lowering cord attaching member is also in a state where the split groove 15 is tightened and the winding shaft 3 is tapered. The movement of 16 is not inhibited.
[0035]
In the lifting / lowering cord winding device configured as described above, when all the lifting / lowering cords 13 are rewound, the lifting / lowering cord attaching member 16 moves to the vicinity of the flange portion 4 as shown in FIG.
[0036]
When the lifting / lowering cord 13 is wound around the winding shaft 3, as shown in FIG. 12, the wound lifting / lowering cord 13 sequentially moves to the other end side of the winding shaft 3, and accordingly, the lifting / lowering cord removal is performed. The landing member 16 also moves in the same direction.
[0037]
With such a configuration, it is possible to obtain the same operational effects as those of the first embodiment. Further, when all the lifting / lowering cords 13 are rewound, there is almost no lifting / lowering cord 13 that remains in the head box. Therefore, the length used as the raising / lowering cord 13 can be minimized.
[0038]
Further, when the winding is started from the state where the lifting / lowering cord 13 is completely rewound, the lifting / lowering cord 13 is pulled up in the vertical direction and wound around the winding shaft 3. The winding operation of the cord 13 can be started with a small torque.
(Seventh embodiment)
FIG. 13 shows a seventh embodiment. In this embodiment, a lifting / lowering cord attaching member 16 is movably supported in a guide groove 17 independent of the split groove 15. The split groove 15 is formed so as to penetrate to the flange portion 4.
[0039]
With such a configuration, the lifting / lowering cord attaching member 16 that moves along the guide groove 17 can obtain the same function and effect as the sixth embodiment, and the split groove 15 that penetrates to the flange portion 4. The winding shaft 3 can be easily bent in a tapered shape.
[0040]
The above embodiment can be modified as follows.
-The said raising / lowering cord winding apparatus can also be used for a hoisting curtain other than a horizontal blind or a pleated curtain.
-You may implement combining each said embodiment suitably.
[0041]
【The invention's effect】
As described in detail above, the present invention provides a lifting / lowering cord winding device that winds a lifting / lowering cord around a taper-shaped winding shaft. It is possible to provide an elevating cord winding device that can be rewound.
[Brief description of the drawings]
FIG. 1 is a front view showing a first embodiment.
FIG. 2 is a sectional view showing a first embodiment.
FIG. 3 is a cross-sectional view showing a first embodiment.
FIG. 4 is a perspective view showing a winding shaft according to the first embodiment.
FIG. 5 is a sectional view showing a winding shaft according to a second embodiment.
FIG. 6 is a side view showing a winding shaft according to a third embodiment.
FIG. 7 is a side view showing a winding shaft according to a fourth embodiment.
FIG. 8 is a side view showing a winding shaft according to a fifth embodiment.
FIG. 9 is a front view showing a winding shaft according to a sixth embodiment.
FIG. 10 is a side view showing a winding shaft according to a sixth embodiment.
FIG. 11 is a front view showing an operation of a winding shaft according to a sixth embodiment.
FIG. 12 is a front view showing the operation of the winding shaft according to the sixth embodiment.
FIG. 13 is a side view showing a winding shaft according to a seventh embodiment.
[Explanation of symbols]
2 Support member 3 Winding shaft 13 Lifting cord 15 Tilt adjusting means (split groove)

Claims (6)

A winding shaft whose diameter changes in a tapered shape is rotatably supported by a support member, and a lifting / lowering cord is wound around the large-diameter side of the winding shaft and sequentially moved toward the small-diameter side, or the lifting / lowering cord is moved from the winding shaft In the shielding material lifting device of the solar radiation shielding device that lifts and lowers the shielding material,
Wherein the winding shaft is shielding material lifting apparatus solar shading device characterized by comprising a tilt adjusting means for automatically increasing size of inclination of the taper in accordance with the increasing size of the winding of the lift cords. The inclination adjusting means is constituted by a split groove formed in the axial direction of the winding shaft formed in a cylindrical shape and opening to the small diameter side, and the winding shaft is cantilevered on the support member on the large diameter side. The shielding material raising / lowering device of the solar radiation shielding apparatus of Claim 1 characterized by the above-mentioned. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 2, wherein a plurality of the split grooves are provided. The said winding shaft increased the thickness toward the said small diameter side, The shielding material raising / lowering apparatus of the solar radiation shielding apparatus of Claim 2 or 3 characterized by the above-mentioned. 5. The solar radiation according to claim 1, wherein a lifting / lowering cord attaching member for attaching an end portion of the lifting / lowering cord is supported on the winding shaft so as to be movable in an axial direction. Shielding material lifting device for shielding device. 6. The shielding material lifting / lowering device for a solar radiation shielding device according to claim 5, wherein the lifting / lowering cord attaching member is supported by a guide groove formed in parallel to the split groove.

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