JPS6344917B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a curtain winding device.

Here, the curtain winding device is composed of a curtain winding drum for winding and unwinding the curtain thereon, and an operating mechanism for rotating the curtain winding drum in order to raise and lower the curtain. Generally speaking, it refers to a device that is
The curtain winding body has a coil spring installed inside it in order to wind and unwind the curtain thereon, and a stopper is placed on the outside of the winding body to facilitate the raising and lowering of the curtain. At the same time, the rotation of the curtain winding drum is stopped by a stopper at a desired position, thereby maintaining the curtain at a desired height. Furthermore, in special cases, it may be necessary to stop the drooping of the curtain at an arbitrary position without providing a stopper. In this case, it is necessary to have a worm gear or bevel gear mechanism cooperate with the curtain winding drum, or to provide a special rotation mechanism.

However, this makes the mechanism complicated and increases the risk of failure.

Further, it is extremely difficult to install coil springs inside a wide curtain winding body.

The present invention eliminates the need to install coil springs or the like in the curtain winding body, and there is no need to provide a stopper.Moreover, the rotation of the curtain can be stopped at any desired location, and the drooping position of the curtain can be set arbitrarily. The object of the present invention is to obtain a curtain winding device consisting of a mechanism of the type described above.

In the present invention, in order to achieve this object, the curtain winding drum shaft is rotatably supported at each end by curtain winding drum fixing fittings, and a curtain winding drum bearing is mounted outside one of the curtain winding drum fixing fittings. An operating rope pulley fixed to the curtain winding drum shaft is rotatably installed inside the pulley, and the operating rope is wound around the circumferential surface of the pulley, with both ends hanging outside from the curtain winding drum bearing. Further, a working pawl is movably housed inside the curtain winding drum bearing between the hanging portions of the operating rope, and the working pawl is moved in one direction by relative rotation of the curtain winding drum bearing with respect to the curtain winding drum fixing fitting. The curtain is moved in this direction, and during this movement, the operating rope is pressed against the inner surface of the curtain winding drum bearing to hold the curtain in that position.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing one embodiment thereof.

First, FIG. 1 is a front view showing the whole of one embodiment of the present invention. In the figure, 1 is a curtain, the upper edge of which is fixed to a curtain winding drum 2, and , its shaft 3 integral with the curtain winding drum 2
has each end horizontally facing the fixed part,
a pair of curtain winding body fixing brackets 4, which are adapted to be fixed appropriately according to the width of the curtain winding body 2;
4, it is rotatably supported horizontally. A curtain winding drum bearing 10 is attached to the outside of one of the curtain winding drum fixing brackets 4 while being supported by the curtain winding drum shaft 3.
1, an operating rope pulley 12 rotatably disposed inside the pulley, and an operating rope 1 wound around the rim of the operating rope pulley 12.
3, and an operating rope 13.
The housing 1 of the curtain winding drum bearing 10 is made of a suitable length according to the mounting height of the curtain 1.
Both end portions are made to hang down from 1 and both ends are connected.

More specifically, as shown in FIGS. 2 to 5 in a neutral state in which the upper edge of the curtain 1 is not fixed to the curtain winding drum 2, the curtain winding drum bearing 10 has a casing 11 attached to the curtain. It has the shape of a flat hollow box that is rotatably supported by a winding drum shaft 3, and the curtain winding drum shaft 3 loosely passes through approximately the center of the box. . In addition, inside the casing 11, the part through which the curtain winding trunk shaft 3 passes,
A substantially cylindrical space is formed so that an operating rope pulley 12, which is non-rotatably mounted on the curtain winding trunk shaft 3, is rotatably accommodated. In this case, the pulley 12 has a substantially V-shaped cross-section at its rim and the housing 1
A uniform gap is formed between the inner peripheral surface of the cylindrical space 1 and the outer peripheral surface of the rim of the pulley 12 so that the operating rope 13 can be wound around the pulley 12 in a slightly compressed state. The dimensions are such that it remains. For this purpose, as shown in FIG. The shape of the cylindrical surface is such that it surrounds the upper half-circumference of No. 12 and a part of the lower half-circumference that follows it. Parallel surface 14,1
It has a shape that looks like a cutout between 4. Furthermore,
Between the parallel surfaces 14 and 14 on the inner peripheral surface of the housing 11, a protrusion 15 for preventing rope entanglement is located near the outer periphery of the pulley 12 and has a recessed upper surface so as to surround it. It is integrally formed so that a clearance sufficient for passing the operating rope 13 remains symmetrically at right angles to X--X and between each end thereof and the parallel surfaces 14, 14. Further, between the parallel surfaces 14 and 14 on the inner circumferential surface of the housing 11, below the protrusion 15, there is a horizontally long, substantially oval cross section with substantially arcuate surfaces formed at both ends. The working pawl 16 is parallel to the parallel surfaces 14,1
4 and the operating rope 13, respectively, so as to be movable in the horizontal direction so as to leave a certain amount of clearance. Further, on the side of the working pawl 16 facing the curtain winding drum fixing bracket 4, a substantially oval projection 17 is integrally formed at the center thereof, and this projection 17 is attached to the housing 11 perpendicularly to the housing 11. It loosely passes through an elongated hole 18 that extends in the horizontal direction and is drilled symmetrically with respect to the line XX, and
The curtain winding drum fixing bracket 4 has a long hole 5 drilled in the horizontal direction symmetrically with respect to the vertical line XX of the housing 11, and protrudes with a sufficient clearance around the hole 5. I'm starting to do that. Note that the latter elongated hole 5 is for regulating the movement of the working pawl 16 in the lateral direction. That is, the elongated hole 5 drilled in the curtain winding drum fixing bracket 4 and the protrusion 17 of the working pawl 16 are arranged as shown in FIGS. 6 to 8.
When the curtain winding drum bearing 10 is rotated with respect to the curtain winding drum fixing bracket 4 around the curtain winding drum shaft 3, a protrusion of the working pawl 16 moves in that direction along with the curtain winding drum bearing 10. One end of the projection 17 abuts against one end of the elongated hole 5, stopping its movement. Therefore, when the curtain winding drum bearing 10 continues to rotate, the projection 17, and therefore the working pawl 16 integrated therewith, The end facing one of the operating ropes 13 is adapted to press the operating rope 13 towards the parallel surface 14 of the housing 11 . For this purpose, if a corresponding arc-shaped recess 19 is formed on the side facing the action pawl 16 of the parallel surfaces 14, 14 of the housing 11, the tightening action of the action pawl 16 on the operating rope 13 will be enhanced. It can be made even stronger. Also, pulley 12
Protrusion 15 for preventing rope entanglement provided below
This prevents the rope 13 on the side to which no tension is applied from being wound around the pulley 12 more than necessary due to friction, causing malfunction of the pulley 12 when the operating rope 13 is operated, which will be explained later. It is for.

In this way, when the curtain winding drum bearing 10 rotates in either direction with respect to the curtain winding drum fixing fitting 4, the operating rope 13 engages the working pawl 16,
It is tightened between the parallel surface 14 of the housing 11 and the operation rope 13 cannot be moved relative to the housing 16. In addition, in this example,
The outer shape of the housing 11 is approximately in the shape of an inverted U.

Although the present invention has the above configuration,
Next, its effect will be explained.

As shown in FIG. 6, when the upper edge of the curtain 1 is fixed to the curtain winding body 2, the curtain winding body 2 will not move due to the weight of the curtain 1.
The curtain winding drum shaft 3 integrated with the curtain winding drum shaft 3 is to be rotated relative to the curtain winding drum fixing bracket 4, and therefore, the curtain winding drum shaft 3 is rotatably mounted in the housing 11 of the curtain winding drum bearing 10 which is non-rotatably attached to the curtain winding drum shaft 3. The attached operating rope pulley 12 can also be rotated. However, an operating rope 13 is wound around the pulley 12, and the rope 13 is also wound around the pulley 12.
Since the inner circumferential surface of the housing 11 surrounds the housing 11 so as to compress the curtain winding drum bearing 10, the friction between them causes the curtain winding drum bearing 10 to also rotate in that direction with respect to the curtain winding drum fixing fitting 4. Begins to move. Therefore, as described above, the movement of the protrusion 17 of the working pawl 16 is controlled by the elongated hole 5 provided in the curtain winding drum fixing bracket 4.
0 (see FIGS. 7 and 8), the operating pawl 16 uses its one end to guide the operating rope 13 to the parallel surface 14 of the housing 11 or to the parallel surface 14 of the housing 11 or the It is compressed between the depressions 19. Therefore, the rope 13 is
In this position, the curtain winding drum bearing 10 will firmly hold the curtain 1, and therefore the curtain 1 will also be firmly held in that position.

On the contrary, in this state, the operating rope pulley 1
When either one of the operating ropes 13 hanging from the curtain winding trunk shaft 3 is pulled, the curtain winding trunk bearing 10 changes the direction of the force applied to the operating rope 13 and the positional relationship of the curtain winding trunk bearing 10 with respect to the curtain winding trunk shaft 3. Based on this, the curtain winding drum rotates around the curtain winding drum shaft 3 and returns to the state shown in FIGS. Since the end of the elongated hole 5 is free from the end, the operating rope 13 can be freely moved relative to the housing 11 of the curtain winding drum bearing 10. When pulled to overcome the friction between the ropes, the friction causes the operation rope pulley 12 to rotate, and the curtain winding drum 2 is rotated via the curtain winding drum shaft 3 fixed thereto, so that the curtain 1 can be freely moved. It can be raised or lowered.

As described above, according to the present invention, by using a curtain winding drum bearing having a simple configuration, the curtain can be smoothly raised and lowered, and it can be stopped reliably at a desired height. Moreover, since this operation can be carried out independently of the width and weight of the curtain, the present invention eliminates all the drawbacks of conventional curtain winding devices and achieves excellent effects. The present invention provides a novel curtain winding device that can perform the following functions.

[Brief explanation of drawings]

FIG. 1 is an overall front view showing one embodiment of the present invention;
Figure 2 is a partially cutaway side view showing the curtain winding drum bearing in a neutral state, and Figure 3 is the same as in Figure 2.
Line sectional view, Figure 4 is a - line sectional view of Figure 3,
FIG. 5 is a view showing a part of the curtain winding drum fixing bracket as seen in the direction of arrow V in FIG. A partially cutaway side view of the curtain winding drum bearing, FIG. 7 is a sectional view taken in FIG. . 1...Curtain, 2...Curtain winding drum, 3...Curtain winding drum shaft, 4...Curtain winding drum fixing bracket, 10...
Curtain winding drum bearing, 11...Housing, 12...Operation rope pulley, 13...Operating rope, 14...Parallel surface, 15...Protrusion for preventing rope entanglement, 16...Working pawl, 17...Protrusion.

Claims (1)

[Scope of Claims] 1. Curtain winding drum shafts are rotatably supported at each end by curtain winding drum fixing fittings, and a curtain winding drum shaft is attached to the outside of one of the curtain winding drum fixing fittings. A curtain winding drum bearing is arranged so as to be rotatably supported, and an operating rope pulley that is non-rotatably attached to the curtain winding drum shaft is rotatably housed inside the housing of the curtain winding drum bearing. The operating rope is wound around the circumferential surface of the curtain winding drum bearing so as to frictionally engage with the inner circumferential surface of the housing of the curtain winding drum bearing and the circumferential surface of the operating rope pulley. They are suspended at intervals, and inside the housing of the curtain winding drum bearing, operating pawls are provided below the operating rope pulley and within the interval between the operating ropes in a direction approximately perpendicular to the hanging direction of the operating ropes. The movement of the action pawl is restricted by the projection provided thereon engaging with the hole drilled in the curtain winding body fixing fitting, and the movement of the action pawl is limited by engaging with the hole drilled in the curtain winding body fixing fitting. A curtain winding device characterized in that a working pawl tightens an operating rope to an inner surface of a housing. 2 Inside the housing of the curtain winding drum bearing, a substantially cylindrical circumferential surface is provided so as to surround the operating rope pulley and leave a certain gap, and the lower part of this cylindrical circumferential surface is provided. in two parallel planes, where the operating rope hangs from the housing, with a spacing of a dimension smaller than the diameter of the rope sheave and symmetrical to a vertical line passing through the center of the operating rope sheave. the housing has a working pawl disposed within the space below the operating rope pulley extending perpendicularly to a vertical line passing through the centerline of the operating rope pulley; 2. A curtain winding device according to claim 1, wherein the protrusion provided on the action pawl loosely passes through a hole drilled in the housing and a laterally elongated hole drilled in the curtain winding drum fixing fitting. 3. Claim 1, in which a protrusion for preventing the operating rope from being caught is fixedly provided inside the housing at the lower part of the operating rope pulley above the operating pawl.
Or the curtain winding device according to item 2.