JPH0137504Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) This invention relates to an operating string tensioning device for a curtain that is opened and closed by operating an operating string.

(Prior Art) A light-shielding curtain provided at a doorway, a window, etc. has an endless operating string hanging from one side thereof, and is opened and closed by operating the operating string. The end of the operating string is usually hung on an operating string tensioning device to prevent swinging.

(Problem to be solved by the invention) The above-mentioned operating string tensioning device tensions the operating string by hanging the endless edge of the operating string around a pulley that is urged downward by the urging force of a coil spring. However, if the direction of the pulley and the endless edge of the operating string were different, there was a problem that the operating string would be stretched in a crossed state.

Structure of the invention (means for solving the problems) In order to solve the above problems, this invention has a tension shaft that rotatably supports the pulley at the upper end and is retractably inserted into the cylindrical body. is urged into the cylindrical body by a biasing means, the upper end of the tension shaft is made into a round shaft part, the lower part of the round shaft is made into a square shaft part with a regular polygonal cross section, and the round shaft part is attached to the upper end of the cylindrical body. A square hole is provided to support the cylinder in a retractable and rotatable manner and to support the square shaft portion only in a retractable manner, and a fixing fitting is provided at the lower end of the cylinder for fixing the cylinder to a floor or wall. It is something.

(Function) With the above means, the tension shaft can freely rotate relative to the cylinder when it is not pulled out from the cylinder, and cannot rotate relative to the cylinder when it is pulled out from the cylinder, and further The relative angle between the pulley and the cylindrical body is selected by selecting the insertion direction of the square shaft portion relative to the cylindrical body.

(Embodiment) An embodiment embodying this invention will be described below with reference to the drawings.
It is suspended and supported so as to be movable along it, and can be opened and closed by operating an operating string 3 hanging from one side thereof. The endless edge of the operating string 3 is hung on an operating string tensioning device 4 and is tensioned so as not to swing.

The details of the tensioning device 4 will be explained according to FIG. 1. In the tensioning device 4, a fixing metal fitting 6 is rotatably supported by a pin 7 at the lower end of a rectangular cylindrical body 5. 5, the tensioning device 4 can be fixed to the floor or wall while the cylinder 5 is held vertically. That is, in the state shown in FIG.
can be fixed to the floor, and by rotating the fixing fitting 6 90 degrees relative to the cylinder 5 from this state, the tensioning device 4 can be fixed to the wall while holding the cylinder 5 vertically.

The tension shaft 8 inserted into the cylindrical body 5 consists of a round shaft part 9 at its upper end and a square shaft part 10 below it. It has a large diameter and a square cross section. A spring holder 11 is fitted into the lower end of the square shaft part 10, and the spring holder 11 is prevented from coming off from the square shaft part 10 by a spring pin 12 passing through the square shaft part 10.

A stopper 13 is fitted and fixed to the upper end of the cylinder 5 with a screw 14, and a square hole 15 is provided in the center of the stopper 13 through which the square shaft portion 10 of the tension shaft 8 can be inserted. There is.

Between the stopper 13 and the spring holder 11 is a coil spring 16 surrounding the tension shaft 8.
is disposed, and as shown in FIG. 1, the tension shaft 8 is always recessed into the cylinder body 5 except for the upper end of the round shaft portion 9 due to its biasing force. In this state, the round shaft portion 9 passes through the square hole 15, so the tension shaft 8 is rotatable relative to the cylinder body 5, and from this state, the tension shaft 8 is moved against the biasing force of the coil spring 16. If it is pulled out slightly from the cylinder 5, the square shaft part 10 will pass through the square hole 15, and the tension shaft 8 will be pulled out from the cylinder 5.
It becomes impossible to rotate.

A support fitting 17 is fixed to the upper end of the round shaft portion 9 of the tension shaft 8, and a pulley 18 is rotatably supported by the support fitting 17, so that the operating string 3 can be hung thereon.

Now, the tension device 4 configured as described above is
As shown in FIG. 1, when the tension shaft 8 is fixed to the floor surface and the operating string 3 is not hung from the pulley 18, the lower end of the tension shaft 8 comes into contact with the pin 7 due to the biasing force of the coil spring 16, and the upper end of the tension shaft 8 comes into contact with the pin 7. It is immersed in the cylindrical body 5 except for. At this time, since the round shaft portion 9 passes through the square hole 15 of the stopper 13, the tension shaft 8 can be freely rotated with respect to the cylindrical body 5.

From this state, the tension shaft 8 is rotated relative to the cylindrical body 5 until the square shaft portion 10 can be inserted through the square hole 15, and then the tension shaft 8 is rotated as shown in FIG.
When the operating string 3 is pulled out against the urging force of the coil spring 16 and the operating string 3 is hung on the pulley 18, the operating string 3 is pulled out by the urging force of the coil spring 16.
becomes nervous. In this state, the tension shaft 8 cannot rotate relative to the cylinder 5, and only a downward urging force acts on the operating string 3.

As described above, in this tensioning device 4, the square hole 15 of the stopper 13 has a square shape, and the square shaft portion 10 of the tensioning shaft 8 also has a square cross section that can be inserted into the square hole 15. When the tension shaft 8 is not pulled out from the cylinder body 5, the support fitting 17 that supports the pulley 18 can be freely rotated with respect to the cylinder body 5. Therefore, when pulling out the support fitting 17 from the cylindrical body 5, the support fitting 17 can be arbitrarily selected from among four relative positions in which the angle of the support fitting 17 is shifted by 90 degrees with respect to the cylindrical body 5. The rotating direction of the pulley 18 and the hanging direction of the endless edge of the operating string 3 can be easily aligned, and the operating string 3 can be tensioned without crossing.

Furthermore, when the operating string 3 is tensioned, the tensioning shaft 8 is non-rotatably supported relative to the cylinder 5, so that the support fitting 17 will not rotate relative to the cylinder 5 when operating the operating string 3. Therefore, the operation string 3 can be operated stably.

Effects As detailed above, in this invention, when the round shaft portion 9 of the tensioning shaft 8 passes through the square hole 15 at the upper end of the cylinder 5, the tensioning shaft 8 can rotate arbitrarily with respect to the cylinder 5. , the tension shaft 8 is pushed against the biasing force of the biasing means, and the cylindrical body 5 is
When pulling out the square shaft part 10 from the square hole 15
By selecting the insertion direction of the pulley 18
The relative angle between the cylinder body 5 and the cylinder body 5 can be selected.
Therefore, even after the cylindrical body 5 is fixed to the floor or wall surface with the fixing fitting 6, the relative angle between the pulley 18 and the cylindrical body 5 can be changed to tension the operation string 3 without crossing it. be effective.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of an operating string tensioning device that embodies this invention, Fig. 2 is a perspective view showing the same with its square shaft pulled out, and Fig. 3 is a front view of a curtain related to this invention. . Cylindrical body...5, Fixing bracket...6, Tension shaft...8,
Round shaft part...9, square shaft part...10, square hole...15,
Coil spring...16, pulley...18.

Claims (1)

[Scope of utility model registration request] A tensioning shaft 8 rotatably supporting a pulley 18 at the upper end is inserted into and retractable from the cylinder 5, and the tensioning shaft 8 is urged into the cylinder 5 by the urging means 16,
The upper end of the tensioning shaft 8 is a round shaft part 9, and the lower part of the round shaft part 9 is a square shaft part 10 having a regular polygonal cross section, so that the round shaft part 9 can be retracted and retracted from the upper end of the cylinder 5 and can be rotated. A square hole 15 is provided to support the square shaft portion 10 in a manner that allows it to protrude and retract.
A curtain operating string tensioning device characterized in that a fixing fitting 6 for fixing the cylindrical body 5 to a floor or a wall is provided at the other end.