JPH0713587Y2 - Screen winding device cord winding structure - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application This invention is for electrically or manually opening and closing a curtain hung on the upper part of a window frame, a theater curtain, a projection screen, or the like. The present invention relates to a cord winding structure for a screen opening / closing device used.

(B) Conventional Technology As a curtain opening / closing device for opening / closing the curtain of the above-mentioned example, there is a curtain opening / closing device already developed by the applicant (see Japanese Utility Model Application No. 63-150539).

As shown in FIG. 4, the curtain opening / closing apparatus 1 simultaneously rotates a winding drum 5 (see FIG. 7) housed in four drum cases 4 ... The curtain 7 is to be opened and closed. That is, one end of the opening / closing cord 6 is fixed and wound around the winding drum 5, and the winding drum 5 is moved up and down through the guide hole 4a (see FIG. 7) formed on the lower surface side of the drum case 4 to thereby raise and lower the curtain. Open and close 7.

(C) Problems to be solved by the invention However, the above-mentioned guide hole is formed in a size having sufficient play so that any opening / closing cord having a different cross-sectional shape such as flat or round can be inserted. There is.

Therefore, when the curtain swings during the opening / closing operation, the opening / closing cord may sway sideways. When the open / close cord rolls, the winding position of the open / close cord is deviated, so that the open / close cord concentrates on a portion of the open / close cord, resulting in a rugged and irregular winding state. If the winding state is irregular as described above, the vertical movement speed of the opening / closing cords is deviated between the four winding drums even though the winding drums rotate at the same time, and the curtain cannot be opened / closed in a straight line.

In view of this, the present invention proposes a cord winding device for a screen opening / closing device that regulates the lifting position of the opening / closing cord so that the winding drum can evenly wind the opening / closing cord and the screen can be opened / closed smoothly and smoothly. The purpose is to provide the structure.

(D) Means for Solving the Problems The present invention is directed to rotating a plurality of winding drums fixed on the rotating shaft by forward and reverse rotation of a rotating shaft that is installed in an aqueous state, and rotating one end of the winding drum. A cord winding structure of a screen opening / closing device that winds or unwinds an open / close cord fixed to the winding drum, and opens / closes a screen by raising / lowering the open / close cord, and on the cord hanging side of the winding drum. A screen opening / closing device in which a guide member having a guide hole through which the opening / closing cord is inserted is disposed, and the guide hole is set to a size corresponding to the cross section of the opening / closing cord to be inserted and a size without unnecessary play. It is characterized by having a cord winding structure.

(E) Operation That is, according to the above-described configuration, for example, according to the type of the opening / closing cord, a guide member suitable for the type is attached at a predetermined position, the opening / closing cord is inserted into the guide hole, or the guide member having different types of guide holes is used. In the case of having a plurality of openings, the opening / closing cord is inserted through the guide hole corresponding to the type. Then, when the rotary shaft is rotated to rotate the take-up drum and the opening / closing cord is lifted / lowered, the guide hole of the guide member prevents the opening / closing cord from rolling laterally and regulates the lifting position.
Therefore, a plurality of winding drums can also perform regular winding similarly.

(F) Effect of the Invention As a result of the above, according to the cord winding structure of the screen opening / closing device of the present invention, since the guide member having the guide hole for restricting the up / down position of the opening / closing cord is provided, the winding drum is The opening and closing cords can be arranged in a spiral shape and can be wound regularly and evenly. As a result, the screen can be opened and closed smoothly and smoothly.

(G) Embodiment of the Invention One embodiment of the invention will be described in detail below with reference to the drawings.

The drawing shows a cord winding structure of a curtain opening and closing device used for opening and closing a curtain as an example of a screen.
In the figure, the curtain opening / closing device 1 has four drum cases 4 ... Arranged at predetermined equal intervals on a rotating shaft 3 provided above the window frame 2, and these drum cases 4 ... Each of the winding drums 5 stored in and held by the rotary shaft 3 is normally and reversely rotated by the rotary shaft 3, and at the same time, each of the four open / close cords 6 having a predetermined length is wound or rewound on each winding drum 5. Open and close the curtain 7.

As shown in FIGS. 1 and 2, the drum case 4 is composed of a separable synthetic resin case body 8 and a case cover 9, and a synthetic resin take-up drum 5 described later. Is housed in a drum housing portion 10 formed in the case body 8, and a case cover 9 is fitted to the open side of the case body 8 and screwed and fixed by a plurality of screws 11 ...

Cord insertion windows 8a and 9a are continuously formed on one side of the case main body 8 and the case cover 9, and the cord insertion window 9 is formed.
The a is formed continuously with the bearing hole 9c formed at the center of the case cover 9.

A lower surface of the drum case 4 corresponding to the hanging side of the curtain 7 and the opening / closing cord 6 is opened, and a metal guide member 13 and a rail holding member 14 made of synthetic resin are provided on the lower surface side of the opening 12. Are arranged respectively.

That is, each guide insertion groove 8b, 9b is formed in the lower facing surface of the case body 8 and the case cover 9 in communication with the opening 12, and each guide insertion groove 8b, 9b has a rectangular guide member. The guide members 13 and the insertion grooves 8b and 9 are inserted into both ends of the curtain 13 and correspond to the hanging side of the curtain 7.
A T-shaped support piece 14c formed in the central portion on the long side of the rail holding member 14 is inserted and fixed in the gap between b and the rail.

As shown in FIG. 5, the guide member 13 has a shape corresponding to the opening / closing cord 6 having a round cross section as shown in FIG. 5, and can be inserted when the opening / closing cord 6 is inserted. Guide hole of a size that does not have unnecessary play other than
13a is bored, and screw holes 13b, 13b are respectively screwed on the upper surfaces of both ends.

A guide member is provided at the center of the upper surface of one rail holding member 14.
A rectangular square hole 14a larger than the guide hole 13a of 13 is formed, and elliptical insertion holes 14b and 14b are formed on the upper surfaces of both ends.

The winding drum 5 is a winding shaft formed in a cylindrical shape.
The rectangular rotary shaft 3 is inserted into the center of the shaft 5a so that power can be transmitted, and the open / close cord 6 is provided on the peripheral surfaces of both ends of the wind shaft 5a.
Each regulation plate 5b, 5b for regulating the winding position of is formed respectively,
Each of the regulation plates 5b, 5b has an opening / closing cord 6 continuous with the inner surface of the winding shaft 5a and the winding surface between the regulation plates 5b, 5b.
Z-shaped cord insertion grooves 5c, 5c are formed in the radial direction.

The drum case 4 is fixed inside a box-shaped rail 15, and the box-shaped rail 15 includes a rail main body 16 and a rail cover 17 made of aluminum that are separable as shown in FIG. The rail body 16 formed into an inverted L shape is fixed to the upper portion of the window frame 2 via the bracket 18, and the four drum cases 4 ... Are fixed to the insides of the rails to rotatably support the rotary shaft 3, and an L-shaped rail cover 17 is fitted and fixed to the open side of the rail body 16.

That is, the locking plate 8c formed on the upper peripheral surface of the case body 8 is locked on the back side of the tip of the horizontal portion of the rail body 16, and the case body 8 and the case cover are attached to the rail 16a formed at the lower end of the vertical portion of the rail body 16. The respective groove portions 8e and 9d formed on the lower surface side of 9 are engaged with each other to fix the drum case 4.

On the other hand, the upper end of the vertical portion of the rail cover 17 is locked to the tip of the horizontal portion of the rail body 16, and the rails 17a formed at the tip of the horizontal portion of the rail cover 17 are formed on the lower surfaces of the case body 8 and the case cover 9, respectively. Rail cover 1 by engaging with 8e and 9d respectively
7 is fixed, and the support plate 8d formed on the lower edge side of the cord insertion window 8a of the case body 8 is brought into contact with the rear side corner of the rail cover 17.

After that, the rail holding member 14 attached to the lower surface side of the drum case 4 is pressed against the rail 17a of the rail cover 17, and as shown in FIG. 3, through the respective insertion holes 14b, 14b of the rail holding member 14, Guide member 13 inserted into the lower surface of the drum case 4
The two screws 20, 20 are screwed and fixed to the respective screw holes 13b, 13b of the rail from the lower surface side, and the rail 17a of the rail cover 17 is held by the rail holding member 14, and the drum case 4 and the rail cover are held.
17 is fixed integrally.

The upper end edge of the curtain 7 is detachably fixed to the outer surface of the vertical portion of the rail body 16 on the box-type rail 15 via the velcro 21, and the cloth is attached to the lower end edge of the curtain 7. The lower end of the open / close cord 6 is fixed by stitching through a predetermined number of guide rings 22 ...

Drive motor arranged inside the above-mentioned box-type rail 15
A switch box 23 is appropriately connected to 19 via an electric circuit (not shown), and the switch box 23 is driven by operating switches 23a, 23b, and 23c.

With the illustrated embodiment configured as described above, the opening / closing operation of the curtain opening / closing device 1 using the opening / closing cord 6 formed in a round shape will be described below.

After the guide member 13 corresponding to the opening / closing cord 6 having a round cross-sectional shape is previously attached to the lower surface side of the drum case 4, the round guide hole 13a is formed in the guide member 13.
Then, the opening / closing cord 6 formed to a length corresponding to the hanging dimension of the curtain 7 is inserted from the lower surface side, and the end portion of the opening / closing cord 6 is projected toward the cord insertion window 8a side of the case main body 8 to bind it, and then the case Through the cord insertion windows 8a, 9a formed in the main body 8 and the case cover 9, the cord is inserted into the cord insertion groove 5c formed in the winding drum 5, and the end of the opening / closing cord 6 is wound into the winding shaft 5a of the winding drum 5. It is locked and fixed on the inner peripheral surface of and is wound.

Next, when the switch box 23 is operated to drive the drive motor 19, the rotary shaft 3 causes the drum cases 4 ...
Each of the winding drums 5 stored in each of the drums rotates forward and backward, and the open / close cords 6 are guided by the guide holes 13a of the guide members 13 assembled in the drum cases 4 for winding and unwinding. , The open / close cords 6 ... Restricted to predetermined winding positions with respect to the winding surface of the winding drums 5 stored in the drum cases 4, and the opening / closing cords 6 wound on the winding drums 5 ... Since the open / close cords 6 are wound in a spiral shape along the winding mountain of ..., the open / close cords 6 are prevented from laterally swaying due to the swinging of the curtain 7 occurring during the open / close operation. You can open and close smoothly.

In this way, the guide member 13 corresponding to the cross-sectional shape of the opening / closing cord 6 is assembled on the lower surface side of the drum case 4, and the elevating position of the opening / closing cord 6 is regulated by the guide hole 13a formed in the guide member 13. It is possible to prevent the open / close cord 6 from laterally swaying by the open / close operation of the winding 7, and during the open / close operation, each winding housed in each of the four drum cases 4 is not affected by the swing of the curtain 7. The open / close cords 6 ... Can be respectively spirally aligned with the take-up drum 5 and wound evenly, and the opening / closing operation can be smoothly performed without impairing the opening / closing posture of the curtain 7.

Moreover, since the guide member 13 is detachably attached as described above, a dedicated guide member for guiding the winding and rewinding of the open / close cords 6 in correspondence with the open / close cords 6 of flat type or round type. By preparing a large number of the open / close cords 6, the drum case 4 and the take-up drum 5 can be wound around the open / close cords 6 such as a flat type or a round type by simply replacing the open / close cords 6 with corresponding guide members 13. It can also be used for rewinding, and the manufacturing cost can be reduced.

The present invention is not limited to the configuration of the above-described embodiment.

For example, as shown in FIGS. 1 and 6, a guide member 13 corresponding to an opening / closing cord 6a having a flat cross section is attached to the lower surface side of the drum case 4 described above, and the guide member 13 is attached. A rectangular opening / closing cord 6a may be inserted through the rectangular guide hole 13c formed in the guide hole 13c to guide winding and unwinding.

Also, not only one type of guide hole is provided in the guide member,
For example, the round guide hole 13a and the flat guide hole 1 described above
3c and 3c may be juxtaposed along the width direction of the guide member 13.
One guide member can also be used.

[Brief description of drawings]

The drawings show an embodiment of the present invention. Fig. 1 is an exploded perspective view of a drum case, Fig. 2 is an enlarged vertical side view of a drum case assembled to a box-type rail, and Fig. 3 is an enlarged lower part of the drum case. FIG. 4 is a perspective view of a guide member having a round opening / closing cord inserted therein, and FIG. 6 is a perspective view of a guide member having a flat opening / closing cord inserted therein. FIG. 7 is an enlarged vertical front view of a drum case showing a conventional cord winding structure. 1 ... Curtain opening / closing device, 3 ... Rotating shaft 4 ... Drum case, 5 ... Winding drum 6,6a ... Opening / closing cord, 7 ... Curtain 13 ... Guide member, 13a, 13c ... Guide hole

Claims (1)

[Scope of utility model registration request] 1. An open / close cord having a plurality of take-up drums fixed on the turn shafts rotated by forward and reverse rotations of a turn shaft installed horizontally, and one end of which is fixed to the take-up drums by this rotation. Is a cord winding structure of a screen opening / closing device that winds or unwinds the cord and opens / closes the screen by raising and lowering the opening / closing cord, wherein a guide hole for inserting the opening / closing cord is provided on the cord hanging side of the winding drum. A cord winding structure for a screen opening / closing device, in which the guide member is provided, and the guide hole has a shape corresponding to the cross section of the opening / closing cord to be inserted and has a size without play.