JPH0740989U - Venetian blind lifting cord handling device - Google Patents

Abstract

(57) [Abstract] [Purpose] A blind is operated by rotating one hollow operating rod 17 hanging from the head box 10 to incline the slat 14 and operating the lifting cords 11 and 12 hanging from the hollow operating rod 17. In the Venetian blind that elevates and lowers, even if the hollow operation rod 17 is arranged between the plurality of elevating cords 11 and 12, without being disturbed by the gear box 15 of the gear ring that transmits the rotation of the hollow operation rod 17 to the tilt shaft. Provided is a lifting cord handling device capable of inserting the lifting cords (11, 12) into the hollow operating rod (17) from the same inlet roll. [Structure] The elevating cord 11 penetrating a slat 14 outside the hollow operating rod 17 is guided in a direction along the lower corner of the rear face of the headbox via first and second guide rolls 31 and 32 provided in the headbox 10. As a result, a gap between the gear box 15 of the gear ring that transmits the rotation of the hollow operation rod 17 to the tilt shaft and the inner surface of the head box 10 is passed through to move to the opposite side, and the third guide roll provided there. 33
Via the same inlet roll with the other lifting cord 12 into the hollow universal joint 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a handling device for guiding a lifting cord of a Venetian blind in a head box.

[0002]

[Prior art]

 A venetian blind in which a hollow operating rod hanging from a head box is rotated to tilt a slat and a lifting cord that is suspended from the hollow operating rod is operated to raise and lower a blind is known from Japanese Patent Publication No. 61-56383. Is. In this device, the upper end of a hollow operating rod is connected to a hollow universal joint, one side of the hollow universal joint is integrated with a hollow bevel gear, and the hollow bevel gear and a bevel gear that engages with the hollow bevel gear are bearings in a gearbox provided in the headbox. However, the bevel gear and the tilt shaft that tilts the slat were rotated together. The bevel gear and gear box that rotate integrally with the tilt shaft were located on one side of the hollow universal joint to form a partition wall. The multiple lifting cords of the device have one end fastened to the bottom rail and the other end vertically through each slat into the headbox and then through the guide rolls to hold the upper end of the hollow operating rod. It was introduced in the universal joint. Since the hollow operating rod was located outside the lifting cord, the other ends of all the lifting cords could be pulled into the hollow universal joint in the same direction via a common inlet roll.

[0003]

[Problems to be solved by the device]

 It is known from Japanese Utility Model Laid-Open No. 59-2896 that a lifting cord is passed through both ends of a slat to facilitate the attachment and detachment of the slat. However, when the lifting cord is passed through both ends of the slat, the position of the hollow operating rod is between the hanging positions of the lifting cords, so at least one lifting cord in the head box has a partition-shaped gear box. However, if a passage for the lifting cord to pass through is provided in the gear box, the structure of the gear box becomes complicated and it takes a lot of time to assemble. Get up.

The present invention has been made to solve this problem, and its purpose is to circulate an elevating cord to pass a bulkhead-shaped gear box and then to provide a common inlet roll for a hollow universal joint. It is to provide a device to guide.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the means adopted by the present invention is to fix a gear box to a head box, accommodate a gear ring for transmitting rotation to a tilt shaft in the gear box, and project from the head box as an input shaft of the gear ring. In a Venetian blind in which a hollow universal joint is provided, a hollow operating rod is connected to the hollow universal joint, and a plurality of lifting cords are introduced from the hollow universal joint to the hollow operating rod, the hollow operating rod is connected to multiple lifting cords. It is placed between the positions that hang down to the slats, the gear box is provided with an inlet roll for introducing the lifting cord into the hollow universal joint, and the third guide roll holder is provided on the inlet roll side in the head box. , The first and second guide roll holders are provided on the opposite side, and the first and second guide roll holders are provided in the bottom of the head box. The first guide roll that lowers the elevating cord that entered vertically from the inside along the inner rear surface of the headbox, and the elevating cord that vertically descends by the first guide roll near the bottom of the headbox along the inner rear surface along the gearbox side. There is provided a second guide roll for turning to the third guide roll holder, and the third guide roll holder is provided with a third guide roll for reversing the elevating cord and directing it toward the inlet roll. The first and second guide roll holders can be formed integrally with the end cap of the head box, and the third guide roll holder can be formed integrally with the tilt drum holder of the tilt drum that tilts the slats.

[0006]

[Action]

 The gearbox traverses the headbox like a partition, but always leaves a gap in the lower corner of the rear face of the headbox. One of the lifting cords that penetrated the slat outside the hollow operation rod entered the headbox through the opening in the bottom of the headbox and was guided by the first and second guide rolls along the lower corner of the inner rear surface of the headbox. As it advances to the gear box side, the lifting cord reaches the third guide roll of the third guide roll holder provided on the inlet roll side through the gap between the gear box and the head box. Since the third guide roll half-turns the elevating cord and guides it to the inlet roll, one elevating cord, together with the other elevating cord, enters the hollow natural joint via the inlet roll, and then inserts the hollow operating rod.

As described above, the device of the present invention has a simple structure in which the first, second and third guide roll holders and the third guide roll holder are provided with the first, second and third guide rolls. Multiple lifting cords can be routed from both sides of the rod to the headbox and threaded through the hollow operating rod from the same side via a common inlet roll.

[0008]

【Example】

 The device of the present invention will be described based on an embodiment shown in the drawings. As shown in FIG. 1, ascending cords 11 and 12 hang down from both ends of a head box 10 of a Venetian blind and penetrate the ends of each slat 14, and one end thereof is fixed to a bottom rail 13. The other ends of the lifting cords 11, 12 are guided by the respective guide rolls 31, 32, 33, 22 in the head box 10, enter the hollow universal joint 16, and then pass through the hollow operating rod 17. The hollow universal joint 16 is supported by the gear box 15.

The first and second guide rolls 31 and 32 are rotatably attached to the first and second guide roll holders 30, and the third guide roll 33 is rotatably attached to the tilt drum holder 20, respectively. The guide roll 22 is rotatably attached to the guide roll holder 23. The first and second guide roll holders and this guide roll holder can be integrated with the end cap. The third guide roll can be attached to a third guide roll holder provided separately from the tilt drum holder. The shift gear accommodated in the gear box 15 transmits the rotation of the hollow operation rod 17, that is, the hollow universal joint 16 to the tilt shaft.

The tilt drum holder 20 bears the tilt drum 19, and the tilt drum 19 receives the rotational drive of the tilt shaft 18. A ladder cord 21 is hung on the tilt drum 19, and each slatt 14 is supported by each weft thread of the ladder cord 21. When the tilt drum 19 is rotated by the tilt shaft 18, the slats 14 are simultaneously tilted. As shown in FIG. 2, the first and second guide roll holders 30 are fixed to the head box 10, the first guide roll 31 is pivotally mounted on the upper rear surface side, and the second guide roll 32 is pivotally mounted below the first guide roll 31. To do. The axis of the first guide roll 31 is parallel to the longitudinal direction of the head box, and the axis of the second guide roll 32 is orthogonal to the longitudinal direction of the head box. The elevating cord 11 rising vertically from the bottom opening of the head box 10 is inverted by the first guide roller 31 and descends along the rear surface inside the head box. Then, the elevating code 11 is deflected at a right angle by the second guide roll 32 and advances toward the gear box along the lower corner of the rear surface in the head box 10.

As shown in FIG. 3, the gear box 15 divides the inside of the head box 10 into a partition shape, but forms a gap in the lower front and rear inner corners of the head box 10. However, since the hollow universal joint 16 passes through the space in the lower corner of the front surface, only the space in the lower corner of the inner rear surface remains. The elevating cord 11 passes through this gap and exits to the opposite side. As shown in FIG. 4, the lifting cord 11 passing through the gap between the headbox 10 and the gearbox 15 and coming out on the opposite side reaches the third guide roller 33 axially attached to the tilt drum holder 20, and is inverted there. And goes to the inlet roll 24 provided on the hollow universal joint 16 side of the gear box 15. In the inlet roll 24, one elevating cord 11 is aligned with the other elevating cord 12 and is introduced into the hollow inside of the hollow universal joint 16.

The axis of the third guide roll shown in FIG. 4 is horizontal, but as shown in FIG. 5, the third guide roll 33 is tilted and axially attached to the tilt drum holder 20, so that the lifting cord 11 can be smoothly moved. It may be deflected and introduced into the inlet roll 24. In this way, the elevating cord 11 is routed from one side of the gear box 15 that traverses the head box 10 in a partition shape to the other side, and the elevating cords 11 and 12 are fed from the same inlet roll 24 to the hollow universal joint 16. It is introduced and inserted into the hollow operation rod 17.

The embodiment shown in FIG. 6 is a Venetian blind provided with double rows of slats 14 and 14, and a large number of lifting cords 11, 11 ′, 12, 12 ′ support one bottom rail 13. As in the previous embodiment, the lifting cord 11 on one end side passes through the gear box 15 in the head box by the first and second guide rolls 31 and 32 provided in the first and second guide roll holders 30, and the tilt drum holder. It reaches the third guide roll 33 provided in 20 and is inverted there, and together with the other lifting cords 12, 11'12 'enter the hollow universal joint 16 via the inlet roll (not shown), and then insert the hollow operating rod 17. To do. In the head box 10, the other lifting cords 11 ′, 12, 12 ′ go to the hollow universal joint 16 via the guide rolls 22 pivotally mounted on the respective guide roll holders 23.

[0014]

[Effect of device]

 As described above, the device of the present invention has the simple structure of the first and second guide roll holders and the third guide roll holder which can be integrally formed with the end cap of the Venetian blind and the tilt drum holder. An elevating cord consisting of first, second, and third guide rolls axially attached to the holder, which penetrates the slat outside the hollow operating rod, connects the gearbox that traverses the headbox in a partition shape with the inner surface of the headbox. It passes through the space in the lower corner of the rear face left between them and reaches from the one side of the gear box to the other side, and enters the inside of the hollow universal joint through the same inlet roll together with other lifting cords, and then the hollow operating rod. Since it can be routed so that it can be inserted into, it has an excellent effect that has never been obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a Venetian blind equipped with a device according to an embodiment of the present invention;

2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along line IV-IV in FIG.

FIG. 5 is a view corresponding to FIG. 4 of another embodiment,

FIG. 6 is a view corresponding to FIG. 1 of another embodiment,

[Explanation of symbols]

10: Head box, 11, 12: Lifting cord, 13: Bottom rail, 14: Slat, 15: Gear box, 16: Hollow universal joint, 17: Hollow operating rod, 18: Tilt shaft, 19: Tilt drum, 20: Tilt drum holder, 21: Ladder cord, 2
2: guide roll, 23: guide roll holder, 24: inlet roll, 30: first and second guide roll holders, 31: first guide roll, 32: second guide roll, 33: third guide roll

Claims (3)

[Scope of utility model registration request] 1. A head box (10), a tilt shaft (18) passing through the head box in a longitudinal direction thereof, a tilt drum (19) rotating with the tilt shaft, and a ladder cord hanging from the tilt drum. (21), the slats (14) supported by the ladder cords, and a plurality of lifting cords (11, 1) hanging from the bottom opening of the head box.
2) A bottom rail (13) fixed to one end, a gear box (15) internally provided in the head box between the hanging cords, and a gear box bearing the gear box. A hollow universal joint (16) protruding from the front surface, a hollow operating rod (17) connected to the hollow universal joint, and a gear ring housed in the gear box and transmitting the rotation of the hollow operating rod to the tilt shaft. A Venetian blind provided with the first and second guide roll holders (30) provided on the head box and the first and second guide roll holders on one side of the gear ring. Guide roll (3
1, 32) are provided, and the elevating cord (11) vertically ascending the bottom opening of the head box through the first and second guide holders is advanced to the gear box side along the lower corner of the rear surface of the head box. To the third side of the headbox on the other side of the gear ring.
A guide roll holder (20) is provided, a third guide roll (33) is provided on the third guide roll holder, and the elevating cord (11) advanced by the third guide roll is reversed to cause another elevating cord. A lifting cord for a venetian blind, characterized in that it is guided together with an inlet roll (24) provided in the gear box, then introduced into the hollow universal joint via the hollow roll, and further inserted into the hollow operation rod. A handling device. 2. The lifting cord routing device for a Venetian blind according to claim 1, wherein the first and second guide roll holders (30) are provided integrally with the end caps of the head box. 3. A lifting / lowering cord handling device for a venetian blind according to claim 1, wherein the third guide roll holder (20) is provided integrally with the tilt drum holder.