JPS6054475B2 - Blind lifting/tilting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for lifting and lowering a horizontal blind, which comprises a number of horizontal slats arranged vertically and at equal intervals. A lifting drum and a tilting drum are attached to the slats, the upper ends of support cords supporting a number of horizontal slats are engaged with the tilting drum, and the upper ends of the lifting cords for raising and lowering these slats are attached to the lifting drum. This invention relates to a blind lifting/lowering tilting device in which a slat can be lifted/lowered and tilted by rotating the operating shaft in either direction.

This type of blind lifting/lowering/tilting device can raise/lower and tilt the slats by rotating a single actuating shaft. Therefore, in manual type blinds, the slats can be raised/lowered and tilted by the rotation of a single operating shaft. The blinds can be raised, lowered, and tilted by operating the tool, and electric blinds can be operated simply by connecting one motor to the operating shaft, making them extremely convenient. It is now widely used.

In this type of lifting and tilting device, the lifting drum and the tilting drum are mounted on the same operating shaft, so that they rotate simultaneously.

Therefore, for example, when lowering a slat from an elevated position, the rotation of the operating shaft in the direction of lowering the slat causes the lifting cord to be unwound from the lifting drum, lowering the slat, and the rotation of the tilting drum. Therefore, the slat tilts in one direction, and when the slat tilts to an almost vertical position, the tilting stops at that position because the edges of the upper and lower slats touch each other, and after that, slippage occurs between the support cord and the tilting drum. The slat is then lowered in its vertical position to the desired position. Once the slat has been lowered to the desired position, the slat is held in that position by stopping rotation of the actuating shaft. Thereafter, when adjusting the tilting state of the slat for light shielding adjustment, the operating shaft is rotated in the opposite direction. This rotation causes the slat to tilt in the opposite direction via the support cord, and when the desired tilt angle is reached, the rotation of the operating shaft is stopped. The conventional lifting/lowering tilting device as described above has the following drawbacks. (1) Since the lifting drum and the tilting drum are operated simultaneously by the same operating shaft, when the blind is lowered to the lowest position and the operating shaft is rotated in the opposite direction to adjust the light shielding, A rise of the slats also occurs, thus keeping the blind in its lowest position (i.e.
The tilting condition of the slats cannot be adjusted (when the blind is in the fully closed position).

(2) In order to be able to finely adjust the tilting angle of the slat, it is desirable that the rotation speed of the operating shaft be as slow as possible.

However, when the operating shaft rotates at a low speed, the rotation speed of the lifting drum also slows down, and it takes time to raise and lower the blind. The present invention aims to provide a blind lifting/lowering device that eliminates the above-mentioned drawbacks.

The lifting and tilting device according to the present invention does not directly connect the operating shaft and the lifting drum, but connects them between the two after the operating shaft idles for a certain period of time, so that the rotation of the operating shaft is transferred to the lifting drum. It is characterized by the arrangement of an idling device consisting of a plurality of idling drums for transmitting transmission. Furthermore, the lifting/lowering tilting device according to the present invention is characterized in that a speed reduction device is disposed between the above-mentioned operating shaft and the tilting drum. The present invention will be described in detail below with reference to embodiments shown in the drawings. Explain.

FIG. 1 shows an embodiment of a blind lifting/lowering tilting device according to the present invention.

In the figure, 1 is a front head box, 2 is an operating shaft horizontally supported within the head box, and 3 is a shaft on the operating shaft. 4 is a tilting drum mounted on the operating shaft; 5 is horizontal slats arranged vertically at equal intervals; 6 is a support cord supporting these slats; 7 is a support cord for supporting these slats; 8 indicates a support for supporting the drum in the head box. The lifting drum 3 and the tilting drum 4 are rotated by rotating the operating shaft 2 to raise and lower and tilt the slats. According to the present invention, the operating shaft 2 and the elevating drum 3 are not directly connected, but an idling device is provided between them that connects the operating shaft 2 and the elevating drum 3 after the operating shaft 2 has idled for a certain period of time. 9 is placed. The illustrated idler 9 comprises a first idler which is arranged to be able to slide axially on the actuating shaft 2 but to rotate with it in the rotational direction, as shown in detail in FIG. It consists of a drum 10, a second idling drum 11 that is loosely fitted thereto, and a third idling drum 12 that is loosely fit therewith, and the third idling drum 12 is connected to the lifting drum 3.

Each of the idling drums 10, 11, and 12 is formed with protrusions 1'', 1V, and 12'', respectively, and when the first idling drum idles approximately once, the protrusions are connected to the second idling drum. In this case, the second idle drum is started to rotate, and when the second idle drum has idled approximately once, the next idle drum is started to rotate, so that the actuating shaft 2 is When the actuating shaft 2 idles for a predetermined number of rotations, the rotation of the actuating shaft 2 is transmitted to the elevating drum.In the figure, reference numeral 13 indicates a spring that acts as a one-way clutch.Furthermore, according to the present invention, the actuating shaft 2 and the tilting A speed reduction device 14 made of, for example, a planetary gear is arranged between the drum 4 and the drum 4 .

As mentioned above, in the lifting/lowering tilting device according to the present invention,
When the operating shaft 2 is rotated in the blind lowering direction from the blind raised position, first, due to the action of the idle rotation device 9, the rotation of the operating shaft 2 is not immediately transmitted to the lifting drum 3, and the operating shaft 2 rotates, for example, three times. However, at this time, the rotation of the actuating shaft 2 is transmitted to the tilting drum 4 via the reduction gear 14, and the tilting drum 4 rotates slowly. It is done.

After the slat has tilted to the vertical position, the idle device 9
All of the idle drums are in a state of transmitting rotation, and the rotation is now transmitted to the lifting drum 3, which rotates and lowers the slat. After the slats have descended to the desired position, for example the fully closed position, the slats 5
When the actuating shaft 2 is rotated in the opposite direction to adjust the tilting angle of the rotor, the rotation is not immediately transmitted to the lifting drum due to the action of the idling device, but the rotation is transmitted to the tilting drum 4 via the deceleration device 14. is transmitted, and the slat is tilted slowly. As described above, according to the present invention, when the slats are tilted, the rotation is not transmitted to the elevating drum, but when the slats are tilted, the slats are moved up and down, as in the conventional case. The slat can be tilted in the lowered position without any problems. Further, since the tilting operation is performed slowly compared to the rotation of the operating shaft, delicate adjustments can be made, and moreover, the lifting and lowering operations can be performed quickly.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a side view showing an embodiment of a blind lifting/lowering tilting device according to the present invention, and Fig. 2 is a perspective view showing an idling device provided in the device shown in Fig. 1. be. 1...Head box, 2...Operating shaft, 3...Elevating drum, 4...Tilt drum, 5...Slat, 6 ...Support cord, 7... Lifting cord, 8...
Support body, 9... Idle rotation device, 10, 11, 12...
...Drum, 1", 1", 12" ...Protrusion, 13
...Spring, 14...Deceleration device.

Claims (1)

[Claims] 1. A lifting drum and a tilting drum are mounted on an operating shaft horizontally supported in a head box, and the upper ends of support cords supporting a number of horizontal slats are engaged with the tilting drum, The upper ends of the lifting cords for lifting and lowering these slats are attached to the lifting drum, and by rotating the operating shaft in either direction, both lifting and lowering and tilting of the slats can be performed. In a blind lifting and tilting device, the operating shaft and the lifting drum are not directly connected, but are connected to each other after the operating shaft idles for a certain period of time to transmit the rotation of the operating shaft to the lifting drum. A blind lifting/lowering device characterized in that an idling device consisting of a plurality of idling drums is arranged. 2. A blind lifting/lowering tilting device according to claim 1, wherein a speed reduction device is disposed between the operating shaft and the tilting drum.