JPS6411797B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a rotation regulating device such as a roll blind, and more specifically, the invention relates to a rotation regulating device such as a roll blind. This invention relates to a rotation prevention mechanism for a winding pipe of a roll blind of an auxiliary type.

[Prior Art] Roll blinds are widely used that use the repulsive torque of a spring installed in a screen winding pipe to wind up a pulled-out screen, or to assist manual winding. , unless the rotation of the winding pipe due to the repulsive torque of the spring is restricted, the pulled out screen cannot be fixed in any position. For this purpose, a clutch-type brake is interposed between the take-up pipe and a fixed shaft that rotatably supports it to freely stop the rotation of the take-up pipe, or the lower end of the screen is directly connected or a cord etc. It is attached to a hanger through the handle. Those equipped with a clutch brake can prevent the winding pipe from reversing, so it is possible to apply initial torque to the spring and install it on the bracket, but the lower end of the screen must be secured to a hanger, etc. Since there are no clutch-type brakes for automatic windings or those with built-in springs to assist manual hoisting, it was not easy for the spring to provide initial torque before installation. Conventionally, when applying initial torque to a spring-loaded roll blind without a clutch-type brake before installation, a special jig such as a stop pin that passes through the winding pipe and fixed shaft was required. There was a problem that I had to operate the . moreover,
Roll blinds equipped with clutch-type brakes also have the problem that if the take-up roll is removed from the bracket without applying the brake, the winding roll will suddenly reverse and become dangerous.

[Object of the present invention] The present invention can prevent the pipe from reversing due to the initial torque applied to the spring before installation, and can prevent the lower end of the screen pulled out as necessary from being locked to a hanger, etc. It is an object of the present invention to provide a rotation regulating device such as a roll blind that can be fixed in any position even when the vehicle is in use.

[Structure of the Invention] In order to achieve the above object, the device of the present invention provides a fixed shaft groove extending in the radial direction on a fixed shaft which is non-rotatably supported by a bracket and rotatably supports a winding pipe, and a fixed shaft groove is provided in the groove. The pawl is inserted into and out of the tube via a spring, an inner circumferential groove is provided on the inner periphery of the end of the winding pipe to engage the pawl, and a lid is attached to the bracket that supports the fixed shaft to push the pawl into the groove of the fixed shaft. This is considered a structural feature. It is desirable to fix a bearing portion for bearing the fixed shaft to the winding pipe, and to fix a ring having an inner circumferential groove cut into the bearing portion. One end of the spring that rotates the winding pipe is locked in the bearing part, and the other end is locked on the extension of the fixed shaft.

With the above configuration, unless the pawl is pushed into the fixed shaft groove, the pawl protrudes in the radial direction due to the spring and engages with the inner circumferential groove of the ring, thereby restricting the rotation of the ring, that is, the rotation of the winding pipe. When the pawl is pushed into the fixed shaft groove, the ring or winding pipe can rotate freely.

The initial winding, or initial torque, of the spring that rotates the take-up pipe to wind up the screen can be easily applied or adjusted by pushing the claw into the fixed shaft groove with your finger and turning the take-up pipe. It is. After applying an appropriate initial torque, when the roll blind is attached to the bracket, the bracket lid pushes the claw into the fixed shaft, and the rotation restriction of the winding pipe is automatically released. At this time, it goes without saying that the head box of the roll blind prevents the winding pipe from reversing.

[Example] The apparatus of the present invention will be described based on an example shown in the drawings. As shown in FIG.
2, a rotating shaft portion 13 is integrally fixed to the other end, and a rotating shaft 14 is attached to the rotating shaft portion so as to be freely removable in the axial direction. The rotating shaft 14 is the bracket 1
5 and is rotatably supported. A fixed shaft 17 is inserted into the bracket 16 on the opposite side,
The fixed shaft 17 passes through the shaft hole of the bearing part 12 and rotatably supports the bearing part 12. A washer 18 is fitted onto the inner end of the fixed shaft 17 and connected to one end of the hollow core 20 via a pin 19. A sleeve 21 is pinned to the other end of the hollow core 20, and an intermediate support ring is rotatably fitted to the sleeve. One end of the spring 39 that rotates the winding pipe 11 is connected to the bearing part 12.
Then, the other ends are respectively locked to the sleeves 21. A groove is provided at the outer end of the fixed shaft 17, and the pawl 24 is fitted into the rotary shaft groove so as to be freely removable in the radial direction. Bearing part 1
A ring 25 is fixed to the inner peripheral surface facing the pawl 24 of No. 2, and an internal tooth-shaped groove that engages with the pawl 24 is carved on the inner surface of the ring. The pawl 24 is pressed outward by a spring 26 attached to the bottom of the groove of the fixed shaft 17.

As shown in FIG. 2, the fixed shaft 17 is a synthetic resin molded body, and an angular outer end portion 31 and a shaft portion 32 project outward and inward from the disk portion 30, respectively. A T-shaped fixed shaft groove 34 is cut into the disk portion 30 and the outer end portion 31, and a coil spring 26 is inserted into the groove.
and the claw 24 is fitted. Tooth-shaped groove 35 on the inner periphery
The ring 25 formed with this is fitted into the disk portion 30. The pawl 24 pushed out in the radial direction by the coil spring 26 fits into the groove 35 of the ring 25. ring 2
5 is fitted into the inlet 36 of the cylindrical rotating shaft portion 12. The outer circumference of the rotating shaft portion 12 is divided into three stages, and on the circumference of the middle stage there is a protrusion 37 that fits into the inner circumferential groove of the winding pipe.
will be provided. A protrusion 38 that locks the front end of the spring 39 is attached to the outer periphery of the inner minimum diameter.
A shaft portion 32 protruding from the rotating shaft portion 12 of the fixed shaft 17
Attach washers 18 to the. Shaft portion 32 of fixed shaft 17
A pin 19 is inserted into the tip of the hollow core 20 to connect the front end of the hollow core 20. A sleeve 21 is attached to the rear end of the hollow core 20 via a pin 41, and the rear end of the spring 39 is locked to the sleeve.

The intermediate support ring 22 is rotatably fitted into the sleeve 21, and the groove on its outer circumference is fitted into the protrusion on the inner circumference of the winding pipe.

As shown in FIG. 3, before the fixed shaft 17 of the roll blind is fitted into the bearing groove 41 of the fixed bearing 40 of the bracket 16 and the lid 42 is closed, the claw 24 is caused to protrude from the fixed shaft groove 34 by the coil spring. Therefore, as shown in FIG. 5, the protruding pawl 24 fits into one of the tooth-shaped grooves 35 of the ring 25 and prevents the ring 25 from rotating. The ring 25 is the bearing part 12
Since the bearing part 12 is integrally fixed to the winding pipe, even if the first wound spring tries to reverse the winding pipe due to repulsive torque,
The winding pipe cannot rotate.

As shown in FIG. 4, when the lid 42 is closed, the pawl 24 is pushed deeply into the groove 34 of the fixed shaft 17, so as shown in FIG. 25 can be rotated in either direction as shown by the arrow.

Although not shown, before shipping the roll blind, if you push the claw into the fixed shaft groove with your finger and rotate the winding pipe a predetermined number of times to apply a certain initial torque to the spring, then release the claw. The claws fit into the ring grooves and the rotation of the winding pipe 11 is prevented. Install the roller blind shipped in this state to the bracket at the installation location. As shown in FIG. 3, the fixed shaft 17 is inserted into the bearing groove 40 of the bracket 16.
When the lid 42 is closed as shown in FIG. 4, the pawl 24 comes off the ring groove 35,
In the state shown in the figure, the winding pipe 11 can freely rotate. When the screen 10 is pulled, the winding pipe 11 rotates in one direction and the screen 10 is pulled out, and when the screen 10 is released, the spring 39 reverses the winding pipe 11 and winds up the screen 10.

Roller blinds without a clutch-type brake must lock the lower end of the pulled-out screen to a hanging device, but roll blinds equipped with the device of the present invention do not require the lower end of the screen to be locked. As shown in FIGS. 3 and 4, it can be stopped at any position after being pulled out. As shown by chain lines in the figure, a cord 43 and a pulley 44 are provided to open and close the lid 42, and the cord 43 is operated to regulate the rotation of the winding pipe. Pull out the screen to any position, pull the cord 43, and close the lid 4.
When the lid 42 is opened, the screen is fixed in that position, and when the lid 42 is closed by pulling the opposite cord, the screen is rolled up by the repulsive force of the spring.

Although a roll blind without a clutch brake has been shown as an example, the device according to the invention can also be used as a safety device for a roll blind with a clutch brake. If the take-up pipe is removed from the bracket without engaging the clutch, the take-up pipe will reverse due to the repulsive force of the spring, creating an unexpected danger.However, with the device of the present invention, when the take-up pipe is removed from the bracket, Since the pawl inevitably fits into the ring groove and prevents the take-up pipe from rotating, there is no danger of the take-up pipe reversing even if the take-up pipe is removed from the bracket without engaging the clutch.

[Effects of the Invention] As described above, the device of the present invention is different from the conventional rotation regulating device in which the winding pipe and the fixed shaft are fixed with a special jig such as a locking pin. When the lid is closed, the rotation restriction of the take-up pipe is automatically released, and when the take-up pipe is removed from the bracket, the rotation restriction is automatically applied, so there is no need for any special operations to restrict rotation or release it. It has excellent effects not found in conventional products.

Additionally, the device of the present invention can be used as a screen fixing device for roll blinds without a clutch type brake, and can also be used as a safety device for roll blinds equipped with a clutch type brake, unlike conventional devices. It can be extremely effective.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a roll blind equipped with the device of the present invention, Fig. 2 is an exploded perspective view of the main part of the roll blind of Fig. 1, and Figs. 3 and 4 are inner end views of the bracket. , FIG. 3 shows the state with the lid open, and FIG. 4 shows the state with the lid closed. FIGS. 5 and 6 are cross-sectional views showing the states of the pawl and ring groove when rotation is restricted and when it is released, respectively. In the figure, 11 is a winding pipe, 12 is a bearing part, 16 is a bracket, 17 is a fixed shaft, 24 is a pawl, 25 is a ring, 26 is a spring, 34 is a fixed shaft groove, 35 is a ring groove, 39 is a spring, 40 is a bearing groove, and 42 is a lid.

Claims (1)

[Scope of Claims] 1. A fixed shaft 17 non-rotatably attached to the bearing groove 41 of one bracket 16, one end rotatably supported by the fixed shaft and the other end rotatably supported by the other bracket. Winding pipe 11
and a spring 39 whose one end side is locked to the fixed shaft and the other end side is locked to the winding pipe, a fixed shaft groove 34 extending in the radial direction provided in the fixed shaft; A pawl 24 is attached to the fixing groove so as to be able to move in and out, a spring 26 is disposed inside the fixing groove and tends to push out the pawl, and a spring 26 is carved on the inner periphery of the winding pipe so as to be engageable with the pawl. It consists of a groove 35 provided therein, and a lid 42 attached to the bracket so as to cover the bearing groove in an openable and closable manner, and when the lid is closed, the pawl is pressed and removed from the groove, and the lid is opened. and the claw is provided so as to be pushed out by the spring and engaged with the groove. 2. A patent characterized in that the winding pipe 11 includes a ring 25 fixed to one end thereof, and an internal tooth-shaped groove 35 is provided on the inner periphery of the ring, and the pawl 24 is engaged with the groove. A rotation regulating device for a roll blind according to claim 1. 3. The winding pipe 11 includes a bearing part 12 fixed to one end thereof and bearing a fixed shaft, one end of a spring 39 is locked to the bearing part, and a ring 25 is fixed to the bearing part. A rotation regulating device for a roll blind according to claim 2.