JP2546980Y2 - Pulley for Roman shade - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a pulley for winding a roman shade lifting cord or tape.

[0002]

2. Description of the Related Art A conventional pulley for winding a hoisting cord or tape of a Roman shade is disclosed in Japanese Utility Model Laid-Open No. 63-11736.
As disclosed in No. 7, the pulley had to be removed from the pulley holder together with the shaft when rewinding the elevating cord or the tape because it was integrally fixed to the shaft.

[0003]

It is a troublesome task to remove the pulley together with the shaft from the pulley holder, especially when a plurality of pulleys are mounted on one shaft.
It takes a lot of trouble. The present invention has been made to solve this problem, and an object of the present invention is to provide a pulley in which a lifting cord or a tape can be easily wound.

[0004]

In order to achieve the above-mentioned object, the present invention adopts a means which integrally rotates a shaft, but slidably fits the pulley shaft in the axial direction, and connects the pulley to the pulley. The pulley is rotatably fitted to the pulley holder, but it is free to rotate in the pulley holder, but cannot slide in the axial direction. A spring is provided between the pulley holder or the pulley and the pulley shaft so that the pulley shaft is connected to one end. Part, and engage the other end of the pulley and the pulley shaft with each other to form a claw that forms a clutch. When the spring pushes the pulley shaft, the clutch is engaged and pushes the pulley shaft against the spring. And the clutch was disengaged.

[0005]

[Action] When rewinding the cut lifting cord or tape, if the pulley shaft is pushed against the spring, the pulley shaft and the pulley claw are disengaged, the clutch is disengaged, and the pulley rotates freely regardless of the shaft. , Without removing the pulley, unwind the remaining lifting cord or tape from the pulley,
A new lifting cord or tape can be wound on the pulley.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A pulley according to the present invention will be described with reference to an embodiment shown in the drawings. As shown in FIG. 1 and FIG.
The bottom plate 13 of the pulley holder 11 is screwed to 10, and the support plate 14 is riveted to the side plate 12 of the pulley holder at intervals. The bearing 15 is sandwiched between the side plate 12 and the support plate 14, and the hollow shaft portion 21 of the pulley 20 is inserted into the inner ring of the bearing 15.
A pulley shaft 22 is slidably inserted in the hollow shaft portion 21 in the axial direction.
Insert the corner shaft 24. Ring on one end of pulley shaft 22
25 is externally fitted and fixed, and a circumferential groove 26 is provided at one end of the hollow shaft portion 21.
The both ends of the coil spring 27 are hung on the ring 25 and the circumferential groove 26, and the pulley shaft 22 is pushed toward one end. At the other end of the pulley 20, there are left and right flanges 28 and 29, and the elevating tape 16 is wound around the cylindrical portion 30 between the flanges. Since the circumferential groove 26 of the pulley 20 is located at one end of the bearing 15, the pulley 20
The axial position is defined by a coil spring 27 that fits into a circumferential groove 26 on one end side and a flange 29 on the other end side. A plurality of claws 31 are provided on the outer surface of the flange 28 of the pulley 20, and the claws are engaged with the claws 32 provided on the other end of the pulley shaft 22 to form a clutch. When the coil spring 27 pushes the pulley shaft 22 to one end, the pawls 31 and 32 engage with the engaging clutch.When the pulley shaft 22 is pushed to the other end against the coil spring 27, the pawls 31 and 32 move in the axial direction. The clutch does not engage and disengages. When the clutch is disengaged, the pulley 20 can be freely rotated on the clutch shaft 22.

As shown in FIGS. 2 and 3, one claw 31a of the flange 28 extends radially to the outer periphery. The claw 31a is composed of both side walls 41 and 42 and a tape clip 43 inserted between the side walls 41 and 42 so as to be able to move in and out in the radial direction. As shown in FIGS. 1 and 3, the tape clip 43 is made of a synthetic resin having a high elasticity, and is slit into the guide portion 34 between the side walls 41 and 42.
44, a small groove 45 that fits in the small projection 35 of the guide portion 34, a tail 46 that fits in the tail groove 36 on the peripheral surface of the cylindrical portion 30, and a knob 47. When the tape clip 43 is inserted to the base of the guide part 34 by inserting the lifting tape 16 or the upper end of the lifting cord into the tail 46 and the small projection 35 fits into the small groove 45, the tape clip
43 is fixed to the flange 28. At this time, the upper end of the elevating tape 16 fits into the tail groove 36 together with the tail 46 to form a smooth peripheral surface.

The tape 16 can be wound while the pulley 20 is attached to the pulley holder 11. Pulley shaft 22 ring
When 25 is pushed toward bearing 15 against coil spring 27, the clutch is disengaged and pulley 20 can be freely rotated. Therefore, the lifting tape 16 wound on the pulley 20
And rotate the pulley 20 to pull it out. Then, when the knob 47 is pushed outward in the radial direction, the small groove 45 comes off the small projection 35, and the tape clip 43 comes off the flange 28 together with the upper end of the lifting tape 16. When the loop at the upper end of the new lifting tape is fitted to the tail 46 and the slit 44 of the tape clip 43 is fitted to the guide portion 34, the small projection 35 fits into the small groove 45 and is fixed. Then, after turning the pulley 20 with a finger to wind a predetermined amount of the elevating tape 16 around the cylindrical portion 30, the pulley shaft 22 is released and the clutch is engaged.

[0009]

As described above, unlike the conventional pulley which could not be freely rotated, the pulley of the present invention can be freely rotated when the clutch is disengaged. There is an excellent effect that the elevating tape or the elevating cord can be re-wound while being held.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a Roman shade equipped with a pulley according to the present invention;

FIG. 2 is a side view of the Roman shade of FIG. 1;

FIG. 3 is an exploded perspective view of the tape clip,

[Explanation of symbols]

 11: Pulley holder 15: Bearing 16: Elevating tape 18: Screen 20: Pulley 22: Pulley shaft 24: Shaft 25: Ring 26: Circumferential groove 27: Coil spring 28: Flange 30: Cylindrical part 31: Claw 32: Claw

Claims (1)

(57) [Scope of request for utility model registration] 1. A pulley, which is axially non-slidably supported by a pulley holder via a bearing and winds an elevating tape or cord for raising and lowering a screen in response to rotation of a shaft. The pulley shaft is movably fitted inside, and the pulley shaft is integrally rotated with the shaft, but is slidably fitted outside in the axial direction, and a spring is interposed between the pulley shaft and the pulley to move the pulley shaft to one side. Pushing, a claw is provided which is engaged with the other end of the pulley shaft and the other end of the pulley to form a clutch. The clutch is engaged when the spring pushes the pulley shaft to one side, and is opposed to the spring. A pulley for a Roman shade, characterized in that the pulley shaft is broken when the pulley shaft is pushed in the opposite direction.