JPH0642543Y2 - Winding drum of screen opening / closing device - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Use The present invention relates to a screen opening / closing device for electrically or manually opening and closing a curtain hung on a window frame, a theater curtain, a projection screen, or the like. Regarding the take-up drum.

(B) Conventional Technique As a curtain opening / closing device for opening / closing the curtain of the above-mentioned example, for example, as shown in FIG. 4, a rotating shaft 2 installed above a window frame A is rotated by a drive motor 16. A device for winding up and down the lifting cords 7 on the winding drums 5 of the cord winding units 3 fixed on the rotary shaft 2, and for lifting the lower end edge of the suspended curtain 6 in a mountain shape. There is.

(C) Problems to be solved by the invention When the curtain 6 is tucked up as described above, the winding drum 5 having a large winding diameter is fixed to the central portion of the rotating shaft 2, and the rotating shaft 2 The winding drums 5 having a small winding diameter are fixed to both ends of the winding drum 5 and the elevating cords 7 are wound around the winding drums 5, respectively.

That is, the winding pitches of the lifting cords 7 ... Which are wound in one rotation are faster in the large-diameter winding drum 5 than in the small-diameter winding drum 5, and the curtain corresponding to the large-diameter winding drum 5. The central lower edge of 6 is pulled up to a higher position in advance, and both lower edges and both lower edges of the curtain 6 corresponding to the small-diameter winding drums 5 are pulled to a lower position.

However, when suspending the curtain 6 as described above, it is necessary to prepare a plurality of types of winding drums 5 having different winding diameters, which causes a problem that the number of parts increases and the cost increases. When tucking up the curtain 6 in a corrugated shape,
After the winding drum 5 is pulled out from an arbitrary position of the rotating shaft 2 removed from the window frame A, the winding drum 5 having an appropriate winding diameter is inserted and attached on the rotating shaft 2, so that the winding drum 5 There is a problem in that attachment and detachment and selection are troublesome, and workability during assembly is poor.

The object of the present invention is to select the engagement / disengagement of the winding pin with respect to the winding drum, so that the winding pitch of the lifting cord wound on the winding drum at an arbitrary position can be increased or decreased. Another object of the present invention is to provide a take-up drum for a screen opening / closing device that can easily change the tuck-up state of the screen into a wavy shape.

(D) Means for Solving the Problems The winding drum of the screen opening / closing device of the present invention rotates the winding drum by the forward and reverse rotations of the rotation shaft installed above the window frame, and the winding drum is rotated. A winding drum for a screen opening / closing device that winds and rewinds an elevating cord to and winds the screen vertically to open and close, the facing surfaces of both side walls formed at both ends of the winding shaft of the winding drum. A pin locking portion is formed at a position radially spaced from the axial center of the winding drum, and a winding pin is provided so that the pin locking portion can be engaged or disengaged. It is a composition.

(E) Action The take-up drum of the screen opening / closing device of the present invention has two ends of the take-up pin on the take-up drum on the rotary shaft fixed at the position corresponding to the preceding pulling-up portion of the screen that increases the tucking amount. The parts are respectively engaged with the pin locking parts formed on both side walls of the take-up drum, and the take-up pins are rotated, so that the take-up drum winds the lifting cord.

Next, when tucking up the screen, the drive shaft is rotated to rotate each take-up drum in the take-up direction, and a take-up pin is attached to the take-up drum of the preceding pull-up portion to increase the take-up amount of the lifting cord. Because of the large amount, the lifting cord wound around the winding drum is wound at the fastest winding pitch.

If the lifting cord is wound directly on the winding drum without attaching the winding pin, the winding amount will be smaller. Therefore, the lifting cord will be slightly slower than the winding drum with the winding pin installed. It is wound up with.

Therefore, when the take-up drum with the take-up pin and the take-up drum without the take-up pin are used together, the lower end edge portion of the screen can be tucked up in a chevron or corrugated shape.

(F) Effect of the device According to this device, the winding drum with the winding pin has a large diameter by selecting the engagement / disengagement of the winding pin with respect to the winding drum and setting the winding amount of the lifting cord. The maximum take-up diameter is equivalent to that of the drum, and the take-up drum without the take-up pin has a normal take-up diameter.

Therefore, by rotating each winding drum in the winding direction and winding each elevating cord, the winding pitch of the elevating cord is fast for a winding drum having a winding diameter with a winding pin attached. In the winding drum having the winding diameter of, the winding pitch of the elevating cord becomes slower, and the screen can be tucked up in a chevron or corrugated shape.

Moreover, since the winding pin is attached to the predetermined position of the winding drum to set the winding amount of the elevating cord, the winding amount can be set easily and with high accuracy, and the winding pin to which the winding pin is attached can be set. It is possible to change the position and location of the leading part of the screen just by selecting the drum, which eliminates the need to manufacture or replace a winding drum with a different winding diameter as in the conventional example. The work time can be shortened and the workability can be improved.

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

The drawing shows, as an example of a screen, a winding drum of a curtain opening and closing device that opens and closes the curtain by lifting it up.
In the figure, a tuck-up type curtain opening / closing device 1 has a plurality of cord winding units 3 made of synthetic resin, which are arranged at predetermined equal intervals, on a rotating shaft 2 installed above a window frame A. The above-mentioned rotation shaft 2 is rotated in the forward and reverse directions to rotate each winding drum 5 in each drum case 4 forming each cord winding unit 3 in the same direction. Each lifting cord 7 formed in a length corresponding to the hanging dimension of the curtain 6 is wound around the drum 5 and rewound, and the hanging curtain 6 is vertically tucked up to open and close.

As shown in FIGS. 1 and 2, the above-mentioned drum case 4 is divided into a case body 8 and a case cover 9.
A case body 8 accommodating a winding drum 5 to be described later and a case cover 9 are fitted to face each other, and then the case body 8 and the case cover 9 are fixed with screws or the like. 5 is rotatably held.

On the other hand, the right side flat surface of the case main body 8 is notched in the fitting surface direction to open the cord insertion window 8a, and the right side flat surface portion of the case cover 9 corresponding to the cord insertion window 8a is notched in the radial direction. A cord insertion groove 9b having a groove width that allows the elevating cord 7 to be inserted is formed in communication with a bearing hole 9a opened at the center of the case cover 9.

As shown in FIG. 3, the take-up drum 5 has a cylindrical take-up shaft 10 formed on both circumferential surfaces of both ends thereof.
The winding restricting surfaces 11, 11 for restricting the winding position of the lifting cord 7 are integrally formed on the winding surface 10a of 10, and the facing surfaces of the winding restricting surfaces 11, 11 are arranged from the inner peripheral side to the outer peripheral side. The taper surface gradually widens toward the side and a square hole 10b is opened in the axial center of the winding shaft 10 in the axial direction to transmit the power of the square rotation shaft 2 formed in the same shape. Insert as much as possible.

Each of the above-mentioned winding control surfaces 11 and 11 has
The symmetrical positions of 1 and 11 are notched in the radial direction, the split grooves 11a and 11a are formed to have groove widths through which the elevating cord 7 can be inserted, and the cord locking portions formed at both ends of the winding shaft 10. 10c,
10c and both sides of the winding surface 10a are cut out to divide each groove.
It communicates with 11a, 11a.

On the other hand, the pin insertion holes 12a, 12b, 12c are opened at positions spaced by a predetermined equal distance in the radial direction with respect to the axial center of the winding drum 5 on the surfaces facing the winding restriction surfaces 11, 11 described above. The winding pin 13 is axially inserted from one side surface of the winding drum 5 into each of the pin insertion holes 12a, 12b, 12c, and the tip end of the winding pin 13 faces the opposite surface side. The pin insertion holes 12a, 12b, 12c opened are screwed and fixed.

That is, each pin insertion hole through which the above-mentioned winding pin 13 is inserted
By selecting 12a, 12b and 12c, the winding amount of the lifting cord 7 when the winding pin 13 is wound around the winding drum 5 is set.

The above-mentioned cord winding unit 3 is housed and held inside a box-shaped curtain rail 14 installed above the window frame A.

As shown in FIG. 3, the above-mentioned curtain rail 14 is composed of a rail main body 15 and a rail cover 16 which are separably formed, and a plurality of brackets 17 fixed to the upper part of the window frame A.
, The upper surface of the rail body 15 formed in an inverted L shape is fixed to the inside of the rail body 15, and the rotary shaft 2, the plurality of cord winding units 3, and the built-in transmission type. After assembling the drive motor 18 integrally and attaching from the open side,
A rail cover (16) formed in a V shape is fitted and fixed to the open surface of the rail body (15) so as to be openable and closable.

On the other hand, via the locking metal fittings 19 locked on the lower surface side of the rails 15a and 16a of the rails 15 and 16 and the screwing portion 8b formed on the lower side surface of the case body 8, this screwing portion is formed. 8b Top nut 20
The screw 21 is screwed onto the screw to fix the mounting position of the cord winding unit 3.

The end of the lifting cord 7 wound around the winding drum 5 has a guide hole 8c opened at the bottom of the case body 8 and a predetermined number of guide rings 22 sewn on the back side of the curtain 6.
And is fixed to the lower end edge of the curtain 6, and the upper edge of the curtain 6 is detachably attached via a velcro 23 attached to the front side of the curtain rail 14.

The drive motor 18 is connected to the shaft of the rotary shaft 2 or the shaft end thereof, and the drive stop is controlled in the winding / rewinding direction by a switch operation of a switch box 24 connected via a control circuit as appropriate. .

In the illustrated embodiment, the curtain 6 is formed in the above-described configuration and the curtain 6 is kneaded up in a mountain shape.

First, as shown in Part 2, after opening the rail cover 16 of the curtain rail 14, the elevating cords 7 ... Are inserted into the guide holes 8c of the drum cases 4 ... After pulling out the ends of the lifting cords 7 toward the cord insertion windows 8a ... Using the inner peripheral surface as a guide, the lifting cords 7
The ends of the ... Are tied together to form each knot 7a.

Next, the winding drums 5 are rotated in the same direction, and the split grooves 11a formed on the winding control surfaces 11 of the winding drums 5 are formed on the cord insertion windows formed on the drum cases 4. After matching with 8a ... and each cord insertion groove 9b ...
Insert each lifting cord 7 ... into each cord insertion groove of each drum case 4.
9b ... And each slit 11a ... of each winding drum 5 ... Inserting each knot 7a ... of each lifting cord 7 ...
It is locked to each cord locking portion 10c of 10 ...

After that, the winding drums 5 ... Are rotated in the same direction to wind the elevating cords 7 ... On the winding surfaces 10a of the winding shafts 10 ... According to the dimensions of the tuck-up portions of the curtain 6 by a predetermined amount. take.

That is, the preceding pull-up portion corresponds to the central lower end of the curtain 6, and the winding drum 5 fixed to the central portion of the rotating shaft 2 corresponding thereto has a large amount of combing, and each winding of the winding drum 5 is increased. After inserting the winding pin 13 of each pin insertion hole 12c, 12c on the outer peripheral side formed on the take-up control surface 11, 11, the winding pin 13 is circulated to wind the lifting cord 7 around the winding drum 5. .

The take-up drums 5, 5 fixed at positions near both sides around the preceding pull-up portion have pin insertion holes 12b, 12b at intermediate positions formed on the take-up regulating surfaces 11, 11 of the take-up drum 5, respectively.
After the take-up pin 13 is inserted through the winding pin 13, the take-up pin 13 is rotated to wind the lifting cord 7 around the take-up drum 5.

Further, the winding drums 5, 5 fixed to both ends of the rotary shaft 2 farthest from the preceding pulling portion do not have the winding pins 13 attached thereto, and the lifting cords for the winding drums 5, 5 are not lifted.
Wind 7 and 7 directly.

The ends of the elevating cords 7 wound on the winding drums 5 by a predetermined amount are inserted into the guide rings 22 sewn on the back side of the curtain 6 and fixed to the lower end edges of the curtain 6, respectively. .

Next, as shown in FIG. 4, when the curtain 6 is tucked up, the drive motor 18 is driven to rotate each winding drum 5 ... Since the winding pin 13 is attached to the winding drum 5 at the farthest position in the radial direction to increase the winding amount of the lifting cord 7, the winding pitch of the lifting cord 7 wound around the winding drum 5 is increased. Is the fastest.

The take-up pins 13, 13 are attached to the take-up drums 5, 5 at positions closer to both sides than the preceding pull-up part at intermediate positions in the radial direction to slightly reduce the take-up amount of the hoisting cords 7, 7. Therefore, the winding pitch of the lifting cords 7, 7 wound around the winding drums 5, 5 is slightly slower.

Further, since the lifting cords 7, 7 are directly wound around the winding drums 5, 5 at both ends farthest from the preceding pulling portion, the winding amount is minimized.
The winding pitch of each lifting cord 7, 7 wound around 5 is the slowest.

Therefore, the leading pull-up portion of the curtain 6, that is, the central lower edge portion of the curtain 6 is pulled up first at the fastest winding pitch, and the trailing pull-up portion of the curtain 6, that is, the curtain 6 is centered around this leading pull-up portion. The lower edge portions on both sides and the lower edge portions on both ends are sequentially pulled up at a slower winding pitch, the central lower edge portion corresponding to the leading pulling portion of the curtain 6 is raised to a higher position, and the both lower edge portions corresponding to the trailing pulling portion of the curtain 6 are lowered. The lower end edge of the curtain 6 can be tucked up in a chevron shape while the edge portion is pulled up to the intermediate position and the lower edge portions on both ends are pulled up to lower positions.

On the other hand, when lowering the curtain 6, the drive motor 18 is reversely driven to rotate the winding drums 5 in the rewinding direction.
Following the rewinding of the winding drums 5, 5 at both ends, the winding drums 5 at the center and both sides rewind the respective lifting cords 7 ... The edge portion and the lower center edge portion are made to reach the lower portion of the window frame A at the same time.

In this way, the selection of attachment of the winding pin 13 to each winding drum 5 and the winding drum 5 through which the winding pin 13 is inserted are selected.
By selecting each pin insertion hole 12a, 12b, 12c formed in,
The winding amount of each lifting cord 7 wound around each winding drum 5 can be set, and the winding drum 5 to which the winding pin 13 is attached has the maximum winding diameter equivalent to the large diameter drum. The take-up drum 5 to which the take-up pin 13 is not attached has a normal take-up diameter.

Therefore, by rotating the winding drums 5 in the winding direction and winding the lifting cords 7 ... The winding pitch is the fastest, and the winding drums 5 and 5 with the winding pins 13 and 13 mounted on the inner circumference side have a slightly slower winding pitch, and the normal winding without the winding pin 13 The take-up drum 5 having the take-up diameter has the slowest take-up pitch, and the curtain 6 can be tucked up in a chevron shape or a wave shape.

Moreover, the winding pin is placed at the predetermined position of the winding drum 5 described above.
Since 13 is attached and the winding amount of the lifting cord 7 is set,
The winding amount can be set easily and with high accuracy, and the position and location of the leading pulling portion of the curtain 6 can be changed only by selecting the winding drum 5 to which the winding pin 13 is attached. As described above, it is not necessary to manufacture or replace the winding drums 5 having different winding diameters, the work time required for this can be shortened, and the workability can be improved.

In the correspondence between the configuration of the present invention and the above-described embodiment, the side wall of the present invention corresponds to the winding-up restricting surface 11 of the embodiment, and similarly, the pin locking portions are the pin insertion holes 12a, 12b. , 12c, but this invention is not limited to the configuration of the above-described embodiment.

For example, the winding pins 13, 13 are attached to the outer peripheral sides of the winding drums 5, 5 fixed to both sides of the central portion of the rotating shaft 2 to increase the winding amount of the lifting cords 7, 7. The lower end edge of the curtain 6 may be tucked up in a wave shape.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is an exploded perspective view of a cord winding unit, FIG. 2 is an enlarged vertical side view of a cord winding unit mounting portion shown in FIG. 4, and FIG. 2 is a vertical sectional front view of the cord winding unit shown in FIG. 2, and FIG. 4 is a front view of the tuck-up curtain opening / closing device. 2 ... Rotation axis, 3 ... Cord winding unit 5 ... Winding drum, 7 ... Lifting cord 10 ... Winding shaft, 11 ... Winding restriction surface 12a, 12b, 12c ... Pin insertion hole 13 ... Winding pin

Claims (1)

[Scope of utility model registration request] 1. A winding drum is rotated by forward and reverse rotations of a rotating shaft installed on the upper part of a window frame, and an elevating cord is wound around the winding drum and rewound, and a screen is vertically tucked up. A winding drum of a screen opening / closing device that opens and closes by a predetermined distance in the radial direction with respect to the axial center of the winding drum, on opposite surfaces of both side walls formed at both ends of the winding shaft of the winding drum. A winding drum for a screen opening / closing device, in which a pin locking portion is formed at a separated position, and a winding pin is provided to the pin locking portion so that engagement and disengagement can be selected.