JPH07102862A - Blind - Google Patents

Abstract

PURPOSE:To prevent a lifting from interwinding a rotation operating bar, and also prevent an auxiliary cord from hanging down. CONSTITUTION:A hollow rotation operating bar 24 is projected downward out of one end of a head box 12 so as to enable a rotating shaft capable of changing the inclination of a slat 10 to be rotatably operated. A lifting cord 18 capable of moving the slat up and down is penetrated through the inside of the rotation operating bar 24 so as to be led out of the lower end. The rotation operating bar 24 is connected to a first bevel gear 28 through which the lifting cord 18 penetrates at the hollow axial center section in such a way that the car can be rotated integrally with the bevel gear. A second bevel gear 32 is meshed with the first bevel gear 28 in such a way that the rotation can be transmitted. The second bevel gear 32 is connected to a third bevel gear 38 in such a way that it is integrally rotated while being capable of being relatively moved in the axial direction. The third bevel gear 38 is meshed with a fourth bevel gear 42 in such a way that the rotation can be transmitted. The fourth bevel gear 42 can transmit the rotation to the rotating shaft 20. The rotation operating bar 24, the first bevel gear 28 and the second bevel gear 32 are made to be capable of being moved in an integrated state by a specified distance in the longer direction of the head box 12.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a blind.

[0002]

2. Description of the Related Art In a conventional blind, an elevating cord for raising and lowering a slat is led out from the vicinity of one end of a head box. One end of the elevating cord is connected to a bottom rail at the other end of an auxiliary cord. Are connected. Further, the head box is provided with a rotary operation rod capable of adjusting the angle of the slat adjacent to the elevating cord derived therefrom.

[0003]

However, the above-mentioned conventional blind has a problem that the lifting cord is entangled with the rotary operation rod during the operation of the lifting cord. In addition, there is a problem that the auxiliary cord hangs down and the appearance is bad particularly when the slats are raised. The present invention is intended to solve such a problem.

[0004]

According to the present invention, an elevating cord derived from a head box is inserted through a rotary operation rod and is derived from a lower end, and the rotation of the rotary operation rod can be transmitted to a rotary shaft. The above-mentioned problem is solved by being able to move in the longitudinal direction of the head box together with the lifting cord. That is, the blind of the present invention includes a head box (12) and a ladder cord (1
6) a number of slats (1) supported in alignment by
0), a bottom rail (14) arranged at one end of the row of slats (10), a rotary shaft (20) rotatable to change the inclination of the slats (10), and a head box (1).
2) A hollow rotation operating rod (24) protruding downward from one end and capable of rotating the rotation shaft (20), and one end connected to the bottom rail (14) and the other end slat (10). An elevating cord (18) which is introduced through the row into the head box (12), is inserted through the rotating operation rod (24) and is led out from the lower end thereof, and an elevating cord (18)
And a stopper device (52) capable of restraining the movement of the first operation bevel gear (28) through which the lifting cord (18) passes through the hollow shaft center portion of the rotation operation rod (24).
And a first bevel gear (2
8) has a second bevel gear (3
2) engaged with the second bevel gear (32)
Is connected to a third bevel gear (38) that rotates integrally with the first bevel gear (38) so that the third bevel gear (38) can transmit the rotation of the third bevel gear (38). The fourth bevel gear (4
2) can transmit the rotation thereof to the rotary shaft (20), and the rotary operation rod (24), the first bevel gear (28), and the second bevel gear (32) are integrated into the head box (12). ) Is movable by a predetermined distance in the longitudinal direction. In addition, the code in the above brackets is
5 shows the corresponding elements of the embodiment.

[0005]

When the tilt angle of the rotary shaft is changed, the first bevel gear integrally connected to the rotary operating rod rotates by rotating the rotary operating rod, so that the second bevel gear meshed with the first bevel gear also rotates. To do. The rotation of the second bevel gear is transmitted to the third bevel gear which is connected to rotate integrally with the second bevel gear. The rotation of the third bevel gear is transmitted to the fourth bevel gear meshed with the third bevel gear, and the rotation shaft rotates. This changes the slant angle of the slats. Further, the slats are raised by further pulling out the lifting cord from the lower end of the rotary operation rod. Next, when lowering the slat, the raising / lowering cord led out from the lower end of the rotary operation rod is moved in the right or left direction (one direction preset for releasing the fastening of the stopper device). As a result, the rotation operating rod also moves in the same direction as the lifting cord, so that the first bevel gear and the second bevel gear also move rightward or leftward together with the rotation operating rod. As a result, the fastening of the stopper device is released, and the lifting cord becomes movable, so that the slats descend due to the weight of the bottom rail. Further, at this time, the second bevel gear moves axially relative to the third bevel gear, so the third bevel gear does not move, and the rotation operating rod is in a state capable of transmitting rotation to the rotary shaft. Next, when stopping the slat, the elevating cord drawn out from the lower end of the rotary operation rod is moved in the direction opposite to that when lowering the slat. As a result, the rotary operation rod moves in the same direction as the lifting cord as in the case of lowering the slat, so that the first bevel gear and the second bevel gear also move in the same direction as the rotary operation rod, and the stopper device is fastened. . As a result, the lifting cord is in a state where it cannot move freely.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an overall view of a blind embodying the present invention. A plurality of slats 10 are arranged in the vertical direction at predetermined intervals, a head box 12 is arranged on the upper end side of the slats 10 row, and a bottom rail 14 is arranged on the lower end side. Head box 12 and bottom rail 14
A ladder cord 16 is provided between and to support each slat 10. The upper end of the ladder cord 16 is connected to a rotating drum (not shown) that can be driven to rotate by a rotating shaft 20 (see FIG. 3) so as to be able to be wound and unwound for a predetermined length. The inclination of is variable. One end of the elevating cord 18 is connected to the bottom rail 14, and the other end is inserted into an insertion hole (not shown) provided in the slat 10 to be introduced into the head box 12, and the head is passed through the insertion hole. It is led out from an outlet 21 (see FIG. 2) provided in the vicinity of one end of the box 12, is inserted through the hollow rotary operating rod 24, and is led out from the lower end of the rotary operating rod 24. A knob 22 is provided at the end of the elevating cord 18 led out from the rotary operation rod 24. A cover 26 is provided at a portion of the head box 12 where the rotary operation rod 24 is provided.

2 shows a view of the inside of the cover 26, FIG. 3 shows a sectional view taken along line 3-3 of FIG. 2, and FIG. 4 shows a sectional view taken along line 4-4 of FIG. The rotation operating rod 24 is connected to the first bevel gear 28 so as to rotate integrally therewith. The first bevel gear 28 is hollow, and the lifting cord 18 is introduced into the rotary operation rod 24 through the hollow portion. In the first bevel gear 28,
The second bevel gear 32 is meshed with and can transmit the rotation. Rotation operating rod 24 and first bevel gear 2
A notch 30 having a predetermined width is provided in a portion of the cover 26 that is connected to the cover 8. Rotary operating rod 24, first
The bevel gear 28 and the second bevel gear 32 are integrally connected by a slide member 34, and are movable in the left-right direction in FIG. 2 by the width of the cutout portion 30. At the end of the second bevel gear 32 opposite to the first bevel gear 28, a tubular portion 36 having a hollow portion 35 having a hexagonal cross section is provided. The hollow portion 35 of the tubular portion 36 of the second bevel gear 32 rotates integrally, but is relatively movable in the axial direction.
Hexagonal shaft portion 40 provided on the bevel gear 38
Are fitted together. The third bevel gear 38 is fixed to the cover 26. The third bevel gear 38 has a fourth
A bevel gear 42 is meshed with the gear, and rotation can be transmitted to the bevel gear 42. Third bevel gear 3 of fourth bevel gear 42
A shaft 44 is provided on the side opposite to the side meshed with the shaft 8. The shaft 44 is introduced into the head box 12 through an opening formed in the head box 12, and a worm 48 is provided at the tip of the shaft 44.
The worm 48 is engaged with a worm wheel 50 that is integrally rotatable with the rotating shaft 20, and the rotation of the worm wheel 50 can be transmitted to the worm wheel 50. At the opening of the head box 12 into which the shaft 44 is introduced, a tilter cover 46 is provided to cover the opening. A stopper device 5 capable of restraining the movement of the lifting cord 18 is provided at the outlet 21 portion of the lifting cord 18 of the head box 12.
Two are provided.

Next, the operation of this embodiment will be described.
When changing the inclination angle of the rotary shaft 20, the rotary operation rod 24 is rotated. As a result, the first bevel gear 28 connected so as to rotate integrally with the rotation operating rod 24 rotates, and thus the second bevel gear 28 engaged with the first bevel gear 28
The bevel gear 32 also rotates. The rotation of the second bevel gear 32 is transmitted to the third bevel gear 38 via the tubular portion 36 and the shaft portion 40 which is connected to the tubular upper portion 36 so as to rotate integrally therewith. The rotation of the third bevel gear 38 is transmitted to the fourth bevel gear 42 engaged with the third bevel gear 38. Since the shaft 44 also rotates integrally with the fourth bevel gear 42, the rotation of the worm 48 provided on the shaft 44 is transmitted to the worm wheel 50 engaged with the worm 48. Since the rotary shaft 20 is connected to the worm wheel 50 so as to rotate integrally therewith, the rotary shaft 20
Rotates. As a result, one of the ladder cords 16 sandwiching the slat 10 and supporting the slat 10 from the front and back is wound and the other is unwound, so that the inclination angle of the slat 10 is changed.

When raising the slat 10, the knob 22 is pulled downward. As a result, the lifting cord 18 is led out from the lower end of the rotary operation rod 24, and the slat 10 is raised. At this time, the vicinity of the rotary operation rod 24 is in a state as shown in FIG. Next, when stopping the slat 10, the elevating cord 18 led out from the lower end of the rotary operation rod 24 is moved to the left as shown in FIG. As a result, the rotation operating rod 24 moves in the same direction as the elevating cord 18, so that the slide member 34 makes the first movement.
The bevel gear 28 and the second bevel gear 32 are also the rotary operation rod 2
Move to the left along with 4. As a result, the lifting cord 18 in FIG. 5 moves to the left end side of the outlet 21, the stopper device 52 is fastened, and the lifting cord 18 becomes immovable. Further, at this time, since the tubular portion 36 of the second bevel gear 32 is led out from the shaft portion 40 of the third bevel gear 38, the third bevel gear 38 does not move, and the rotation operating rod 24 is attached to the rotation shaft 20. It is a state in which rotation can be transmitted. Next, when lowering the slat 10, the lifting cord 18 led out from the lower end of the rotary operation rod 24 is moved to the right in FIG. As a result, the rotation operating rod 24 moves in the same direction as the lifting cord 18 as in the case of stopping the slat 10, so that the first bevel gear 28 and the second bevel gear 32 also move to the right, and the stopper device 52 is fastened. Is released. As a result, the elevating cord 18 can move freely, and the slat 10 descends due to the weight of the bottom rail 14. Next, when the slat 10 is stopped in the middle of descending, the lifting cord 18 is moved to the same position as in the case of stopping the slat 10 described above.
It is performed by moving to the center left direction. In the above embodiment, the stopper device 52 is fastened when the lifting cord 18 is moved leftward, and the fastening of the stopper device 52 is released when the lifting cord 18 is moved rightward. The present invention is not limited to this, and the stopper device 52 may be unfastened when the lifting cord 18 is moved to the right, and the stopper device 52 may be fastened when the lifting cord 18 is moved to the left. .

[0010]

According to the present invention, the raising / lowering cord led out from the head box is passed through the inside of the rotary operation rod and is led out from the lower end, and the rotary operation rod has the first, second, third and fourth bevel gears. Since it is connected to the rotary shaft movably in the longitudinal direction of the head box, the slats can be raised and lowered by raising and lowering the raising and lowering cords drawn from the lower end of the rotating operation rod. By moving the head box in the left-right direction, the lifting cord can be switched between a movable state and a non-movable state. Therefore, although the operating method is the same as that of the conventional blind, the entanglement of the lifting cord with the rotary operating rod can be eliminated. Moreover, since the auxiliary cord is not connected to the tip of the lifting cord, the auxiliary cord does not hang down, and the appearance is good.

[Brief description of drawings]

FIG. 1 is an overall view of a blind embodying the present invention.

FIG. 2 is a diagram showing a state inside a cover.

3 is a sectional view taken along line 3-3 of FIG.

4 is a cross-sectional view taken along line 4-4 of FIG.

FIG. 5 is a diagram showing a state in which the lifting cord is moved to the left.

[Explanation of symbols]

 10 slat 12 head box 14 bottom rail 16 ladder cord 18 lifting cord 24 rotary operation rod 28 first bevel gear 32 second bevel gear 38 third bevel gear 42 fourth bevel gear 52 stopper device

Claims (1)

[Claims] 1. A headbox (12), a number of slats (10) supported in alignment by a ladder cord (16), and a bottom rail (14) arranged at one end of a row of slats (10). A rotating shaft (20) rotatable so as to change the inclination of the slat (10), and projected downward from one end of the head box (12),
A hollow rotary operating rod (2) capable of rotating the rotary shaft (20).
4) and one end is connected to the bottom rail (14), and the other end is inserted through the row of slats (10) and the head box (1
2) A lifting cord (18) which is introduced into the rotary operating rod (24) and is guided out from the lower end thereof, and a stopper device (52) capable of restraining the movement of the lifting cord (18). In the blind having the rotary operation rod (24), the hollow shaft center portion is moved up and down by the cord (1
8) is rotatably connected to a first bevel gear (28) through which the second bevel gear (28) is inserted, and a second bevel gear (32) is engaged with the first bevel gear (28) so that the rotation thereof can be transmitted. The second bevel gear (32) rotates integrally with the second bevel gear (32), but is axially movably connected to the third bevel gear (38), and the third bevel gear (38) is capable of transmitting the rotation of the second bevel gear (38). The fourth bevel gear (42) is engaged with the fourth bevel gear (42), and the fourth bevel gear (42) rotates the rotation of the fourth bevel gear (42).
0), the rotary operation rod (24), the first bevel gear (28), and the second bevel gear (32) can move in a longitudinal direction of the head box (12) as a unit by a predetermined distance. There is a blind.