JPS6237914Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a roll blind.

Generally, a roll blind has a torsion spring built into the winding roll, which always applies a rotational force to the winding roll by the torsion spring, and a stopper is provided to stop this rotation. The blind main body made of cloth or the like is stopped at a desired height. In such blinds, when the stopper is released, the blind body is completely rolled up onto the winding roll. This winding is performed by the elastic force of a torsion spring, so for this type of blind, it is necessary to adjust the torsion spring according to the width and height of the blind body, and the higher the elastic force is, the higher the winding speed is. It's fast, and the smaller the elasticity, the slower it is.
It had the following characteristics. This is the drawback of roll blinds.

In order to eliminate such drawbacks, the applicant has previously provided a reduction gear and a hand wheel as a mechanism for winding up the blind body smoothly and at a constant speed independent of the width and height of the blind body. Therefore, we devised a roll blind that stabilizes torque and rotational speed.

In this roll blind, when the blind body is rolled up, that is, when the stopper is released, the stoppers on the reduction gear and the handwheel (for stable torque and rotation speed) that are linked to the torsion spring must be released. Must be.

The present invention aims to provide a roll blind as described above, in which the stopper can be released with only the first operation.

In the roll blind according to the present invention, in order to stabilize the rotation of the hoisting roll that winds up the blind body made of cloth or the like, the roll blind is equipped with a speed reduction device. A spring clutch, a clutch ring, and a stopper that stops the rotation of the clutch ring in the blind winding direction are provided on the stepped portion formed on the outside of the clutch ring, and on the inner peripheral surface of the clutch ring, each end of the spring clutch A shoulder portion is provided between the two ends of the spring clutch, and a pin is provided at either end of the spring clutch to restrict the rotation of the spring clutch, and when the blind body is pulled down, the spring clutch is loosened. When the clutch shaft is freely rotated and the clutch ring is stopped by the stopper, the spring clutch is tightened to stop the rotation of the clutch shaft, and when the stopper is removed and the clutch ring is allowed to rotate, the spring clutch is It is characterized in that it is loosened to allow rotation of the clutch shaft in the direction of pulling up the blind.

The embodiments shown in the drawings will be described below. Figure 1 shows the external appearance of a roll blind according to the present invention, in which 1 is the blind body made of cloth, etc.;
is the bearing of the winding roll that winds up the blind body,
3 is a case housing the operating mechanism, and 4 is an operating string. This roller blind is lowered to a desired height by pulling down the blind body by hand, and rolled up by pulling the operating string 4.

As shown in FIG. 2, a torsion spring 6 is built into the winding roll 5, and the elastic force of this torsion spring causes the winding roll 5 to constantly apply rotational force in the direction of winding up the blind body 1. Granted. In this roll blind, a deceleration device 7 and a hand wheel 8 are arranged to ensure that the winding roll 5 rotates smoothly and at a constant speed when the blind is rolled up. However, in order to be able to quickly pull down the blind main body when the blind is being pulled down, a ratchet mechanism 10 is disposed within the gear 9 of the reduction gear, and the reduction gear 7 and the hand wheel 8 are activated only when the blind is rolled up. It's starting to work.

According to the present invention, in the roll blind as described above, a clutch ring 13 is disposed via a spring clutch 12 around a clutch shaft 11 that rotates together with the hoisting roll 5. Protrusions 12a and 12b are formed at both ends of the spring clutch 12, and a pin 14 is provided so as to be able to come into contact with the protrusions 12a and 12b.
protrudes inward from case 3. A step 13a is formed on the outside of the clutch ring 13, and a stopper 15 is provided on the step 13a to stop the clutch ring from rotating in the blind winding direction. This stopper 15 is pivotally mounted in the case 3 at a shaft 16, and its tip end face 15a is in contact with the stepped part 13a, and the other end part 15b is in contact with the step part 13a.
An operating string 4 is connected to. This stopper 15
However, the stopper 15 is placed between the end 15b of the stopper 15 and the case 3 so that the stopper 15 is constantly rotated at the position where the rotation of the clutch ring 13 in the blind winding direction is stopped against the step 13a. A spring 17 is arranged. Clutch shaft 1 above
1. The clutch device is composed of a spring clutch 12 and a clutch ring 13. When pulling down the blind body 1, the clutch spring 12 is loosened to allow the clutch shaft 11 to rotate freely, and the clutch ring 13 is held by the stopper 15. When the clutch is stopped, the spring clutch 12 is tightened to stop the rotation of the clutch shaft 11, and when the stopper 15 is removed to allow the clutch ring 13 to rotate, the spring clutch 12 is loosened and the clutch shaft 11 is moved in the blind lifting direction. It is configured to allow rotation of.

In the illustrated roll blind, as described above, protrusions 12a and 12b protruding outward are formed at both ends of the spring clutch 12, and protrusions 12a and 12b are formed on the inner peripheral surface of the clutch ring 13 at each end of the spring clutch. , 12b are formed, and between these protrusions 12a and 12b, a pin 14 that restricts rotation of the spring clutch protrudes inward of the case 3.

In the roll blind described above, when the blind is folded, it is in the state shown in FIG. 4A. When the blind main body 1 is pulled downward, the clutch shaft 11 also rotates as the winding roll 5 rotates.
Perform the left rotation shown in Figure A. As a result of this rotation, as shown in FIG. be lowered. When the blind main body 1 is pulled down to the desired position and the blind main body stops lowering at a certain position, the main body tries to be wound up by the action of the torsion spring 6, but the stepped portion 13a of the clutch ring 13 15a,
It becomes impossible for the pin 14 to push the protrusion 12a of the spring clutch 12, and the clutch is activated. In this state, the blind body is stopped at a desired position. This state is shown in FIG. 4B.

Next, when the operating string 4 is pulled downward to wind up the blind, the step 13a of the clutch ring 13
and the end surface 15a of the stopper 15 is disengaged,
The stepped portion 13a of the clutch ring 13 is a stopper 15.
introduced into the world. In this case clutch ring 13
In this case, the protrusion 12b of the spring clutch 12 is connected to the pin 14.
After that, the spring clutch 12 is loosened by the pin 14, the shaft 11 is rotated by the elastic force of the torsion spring 6, and the blind body 1 is thus rolled up.

As described above, in the roll blind according to the present invention, when winding up the blind, the winding roll is rotated at a constant and stable speed even if the width and height of the blind is different, and the winding roll is rotated at a constant and stable speed. In this case, all you have to do is first release the stopper.
The blind is rolled up to its fully rolled up position.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a roll blind according to the present invention, Fig. 2 is a partial sectional view showing the operating mechanism of the roll blind according to the present invention, and Fig. 3 shows a ratchet mechanism in the mechanism shown in Fig. 2. The side view and FIGS. 4A, 4B and 4C are sectional views showing the sequential operation of the stopper mechanism according to the present invention. 1...Blind body, 2...Bearing, 3...Case with built-in operating mechanism, 4...Operation string, 5...
Sales roll, 6...Torsion spring, 7...Deceleration device,
8...Handwheel, 9...Gear, 10...Ratchet mechanism, 11...Clutch shaft, 12...Spring clutch, 13...Clutch ring, 14...Pin,
15...Stopper, 16...Shaft, 17...Spring.

Claims (1)

[Scope of utility model registration request] In order to stabilize the rotation of the hoisting roll that winds up the blind body made of cloth or the like, in a roll blind equipped with a speed reduction device, a spring clutch, a clutch ring, and the clutch are sequentially mounted around a clutch shaft that rotates together with the hoisting roll. A stopper is provided on the stepped portion formed on the outside of the ring to stop the clutch ring from rotating in the blind winding direction, and a shoulder portion corresponding to each end of the spring clutch is provided on the inner peripheral surface of the clutch ring. A pin is provided between both ends of the spring clutch to restrict the rotation of the spring clutch, and when the blind body is pulled down, the spring clutch is loosened and the clutch shaft is allowed to rotate freely. When the clutch ring is stopped by the stopper, the spring clutch is tightened to stop the rotation of the clutch shaft, and when the stopper is not removed and the clutch ring is allowed to rotate, the spring clutch is loosened and the clutch shaft is pulled up blindly. A roll blind characterized by allowing rotation in direction.