JP7653680B2 - Roll screen equipment and fittings - Google Patents

Description

The present invention relates to a roll screen device that rolls up a screen by rotating the winding shaft of the screen through the operation of an operating cord, and more specifically, to a roll screen device that rolls up a screen through the operation of an operating cord that is formed in an end shape without connecting both ends.

Screen devices in which the winding shaft of the screen is rotated by operating an operating cord, thereby unwinding or winding the screen, are already known. For example, Patent Document 1 discloses a screen device in which a sprocket is provided at one end of a winding shaft supported by a winding box, an endless circular operating cord is wound around the sprocket, and the screen is unwinded or wound by rotating the operating cord in forward and reverse directions. However, in screen devices using this type of operating cord, two operating cords extend from the winding box, and it is necessary to correctly select one of the operating cords depending on whether the screen is unwinding or winding. Moreover, these two operating cords are easily noticeable from the outside, so there is still room for improvement in terms of operability and design.

JP 2016-106191 A

The technical objective of this invention is to provide a roller blind device with an operating cord that is easy to operate and has a good design.

In order to solve the above problems, according to the present invention, there is provided a roll screen device comprising a winding shaft supported rotatably about an axis, a winding box in which the winding shaft is housed, and a screen provided so as to be capable of being wound and unwound from the winding shaft by the rotation of the winding shaft, the screen being stored in the winding box as the screen is wound onto the winding shaft, and the screen being drawn out from within the winding box as the screen is unwound from the winding shaft, the roll screen device comprising a rotation transmission mechanism connected to one end of the winding shaft within the winding box for rotating the winding shaft, and an operating cord connected to the rotation transmission mechanism, the operating cord being formed in an end-shaped manner having a first end and a second end without both ends being connected to each other, the first end side being connected to the winding box, a hollow frame body extending perpendicular to the axis is connected to an end of the winding box where the rotation transmission mechanism is arranged, the inside of the frame body is divided into a first chamber and a second chamber by a partition extending in the longitudinal direction of the frame body, a slit is formed in the frame body extending in the longitudinal direction thereof and communicating with the first chamber of the frame body, an engaging member attached to the side edge of the screen facing the frame body is slidably engaged with the slit, an opening is formed in the end face of the frame body facing the winding box, the second end side of the operating cord is movably accommodated in the second chamber through the opening of the frame body, and the winding shaft rotates through the rotation transmission mechanism by pulling the first end side of the operating cord.

It is also preferable that the rotation transmission mechanism has a rotation transmission body around which the operating cord is wound and which rotates when the operating cord is pulled, and a speed change mechanism that transmits the rotational motion of the rotation transmission body to the winding shaft at a predetermined rotation ratio greater than 1, thereby making the rotational speed of the winding shaft greater than the rotational speed of the rotation transmission body.

In addition, in a preferred embodiment of the roller screen device according to the present invention, the rotation transmission body is a pulley formed in an annular shape and supported rotatably around an axis extending parallel to the axis, and the speed change mechanism is composed of an internal gear formed on the inner surface of the pulley and a spur gear that meshes with the internal gear and is coaxially connected to the winding shaft.
In this embodiment, it is preferable that the outer peripheral surface on the rear side of the pulley is disposed on an extension line of the frame.

Furthermore, in a preferred embodiment of the roller blind device according to the present invention, the winding box has a locking portion for holding the operating cord, which is pulled out of the winding box by a pulling operation, at any pull-out position, and the operating cord is formed by connecting multiple ball members at regular intervals with flexible connecting strips, and the ball members can be engaged and disengaged with the locking portion, and the operating cord is configured to be held at any pull-out position when the ball members are engaged with the locking portion.

In addition, in this embodiment, it is preferable that the roller blind device has a cord outlet path for leading the first end side of the operating cord to the outside, the locking portion is an locking hole cut into the cord outlet path and opening toward the outside, and the width of the locking hole is smaller than the diameter of the ball member of the operating cord and larger than the diameter of the connecting strip.
In this embodiment, the roller blind device is attached to a fixture.

In the roller blind device according to the present invention, the operating cord for rotating the winding shaft is formed as an end-type device having a first end and a second end without both ends being connected to each other, and the first end is led out from inside the winding box to the outside for pulling operation. Therefore, the first end of the operating cord can be easily operated, and a roller blind device with excellent design can be provided.

1 is a longitudinal sectional front view showing a main part of a roller screen device according to the present invention, with a part cut away; FIG. 2 is a horizontal cross-sectional view of the roller screen device. FIG. 2 is a side cross-sectional view of the roller screen device. FIG. 2 is an exploded perspective view showing a rotation transmission mechanism of the roller screen device. FIG. 5 is a perspective view of the rotation transmission mechanism shown in FIG. 4 in an assembled state. 2 is an enlarged vertical cross-sectional view of a rotation transmission mechanism of the roller screen device shown in FIG. 1 .

The following describes an embodiment of the roller screen device according to the present invention. The roller screen device 1 of this embodiment is a vertical opening type roller screen device that opens and closes in the vertical direction by unwinding and winding the screen 2 from the winding shaft 3. The roller screen device 1 is supported rotatably around an axis L1 extending horizontally (left and right direction in FIG. 1), with the left end being the first side end and the right end being the second side end. The roller screen device 1 includes an upper frame, a winding box 4 that extends horizontally and accommodates the winding shaft 3, frame bodies 5 and 6 that are connected to the left and right ends of the winding box 4 and extend perpendicular to the axis L1, i.e. downward, and a rotation transmission mechanism 7 for rotating the winding shaft 3. The roller screen device 1 is supported by a window frame 51 attached to an opening in a building, and the roller screen device 1 and the window frame 51 form a fitting 50.

The screen 2 opens and closes by guiding its left and right ends into the respective frames 5, 6, and a number of engagement members 9, consisting of halves of fasteners used for clothing, etc., are attached to the side edges of the left and right ends of the screen 2. These engagement members 9 are slidably engaged with slits 11, 12 of the frames 5, 6, which will be described later, allowing the screen 2 to move up and down along the frames 5, 6. In addition, one end of the screen 2 is attached to the winding shaft 3, and the other end of the screen 2 is attached to a movable crosspiece 8 that functions as a weight.

The winding shaft 3 is a shaft supported rotatably relative to the winding box 4, and has a flange at its first side end and a support shaft at its second side end for supporting it in the winding box 4. The winding shaft 3 has a cylindrical winding shaft body 3a, a winding cap 3b attached to the first side end of the winding shaft body 3a, and a support shaft 3c extending from the second side end of the winding shaft body 3a along the axis L1 and rotatably supported at the right end of the winding box 4. The winding cap 3b is fitted into the first side end of the winding shaft body 3a, and a flange is provided at the first side end. The flange of the winding cap 3b has a fitting hole 3d formed in a prismatic shape on the axis L1. The support shaft 3c is fitted into the second side end of the winding shaft body 3a, and its tip is rotatably supported by the winding box 4.

The winding box 4 is formed in a substantially square prism shape, and includes a hollow winding box body 13 that has a substantially rectangular cross-sectional shape and extends horizontally, and a pair of end caps 14, 15 that are provided at both ends of the winding box body 13 and are screwed to the winding box body 13. A screen outlet 10 is formed on the underside of the winding box body 13, and when the winding shaft 3 housed in the winding box 4 rotates around the axis L1, the screen 2 wound around the winding shaft 3 is unwound from the screen outlet 10 or wound around the winding shaft 3.

The end caps 14 and 15 are both formed to be approximately the same shape and size as the openings at both ends of the winding box body 13, and rotatably support the first and second side ends of the winding shaft 3, respectively. The end cap 14 is attached to the end of the winding box body 13 where the first side end of the winding shaft 3 is located, and is formed so that it can rotatably accommodate the rotation transmission mechanism 7 connected to the winding cap 3b and lead the first end 16a side of the operating cord 16 from inside the winding box 4 to the outside. On the other hand, the end cap 15 is attached to the end of the winding box body 13 where the second side end of the winding shaft 3 is located, and is configured to rotatably support the support shaft 3c. And since the other structure of this end cap 15 is well known, further explanation of its structure will be omitted.

The end cap 14 includes a cap body 21 formed in a substantially plate-like shape, a storage section 22 provided on the inner wall of the cap body 21 and storing the rotation transmission mechanism 7, a cord outlet path 23 opened on the front side of the cap body 21 for leading the first end 16a of the operating cord 16 from the end cap 14, and a guide member 27 for guiding the second end 16b of the operating cord 16 to the first frame 5. The storage section 22 is formed by an outer peripheral wall 24 erected in an annular shape on the inner peripheral wall of the cap body 21, with the center being the intersection point between the cap body 21 and an axis L2 that is parallel to the axis L1 and located on the front side of the axis L1, an inner peripheral wall 25 that has the same center as the outer peripheral wall 24 and is erected in an annular shape on the inner side of the outer peripheral wall 24, and a part of the cap body 21 that constitutes the bottom wall.

The outer peripheral wall 24 has an opening on the rear side below the center of the outer peripheral wall 24 and on the front side at a position approximately the same height as the center of the outer peripheral wall 24, and the guide member 27 is provided at the opening on the rear side. The inner peripheral wall 25 has an opening on the rear side above the center of the inner peripheral wall 25, and a cylindrical support member 26 is provided at this opening. The distance between the outer peripheral wall 24 and the inner peripheral wall 25 is formed to be slightly larger than the distance between the outer peripheral surface 34a and the inner peripheral surface 34b of the pulley 34 described later, and the height of the outer peripheral wall 24 and the inner peripheral wall 25 is formed to be approximately the same as the thickness of the pulley 34, so that the pulley 34 can be accommodated in the accommodation section 22. On the other hand, the support member 26 is a member for supporting the spur gear 38, and by supporting the spur gear 38 on the support member 26, the spur gear 38 can be accommodated in the opening of the inner peripheral wall 25.

The cord outlet path 23 is a path for leading the first end 16a of the operating cord 16 from the winding box 4 to the outside, and is arranged so that its base end is located on the outer peripheral surface 34a on the front side of the pulley 34, preferably on the front end of this outer peripheral surface 34a. The width of the cord outlet path 23 is formed to be slightly larger than the diameter of the ball member 17 described below, and a downward opening 28 is provided at the tip of the path. At the lower edge 28a of the opening 28, a locking hole 28b is cut into a substantially circular shape to lock the ball member 17, and opens toward the outside of the cord outlet path 23. The width of this locking hole 28b is smaller than the diameter of the ball member 17 and larger than the diameter of the connecting strip 18 described below, so that by locking any ball member 17 into the locking hole 28b, the operating cord 16 can be held in any drawn-out position, and by removing the ball member 17 that is locked into the locking hole 28b, the retention of this operating cord 16 can be released.

A cover plate 29 formed to be approximately the same shape and size as the cap body 21 is attached to the end cap 14 by screws so as to cover the pulley 34 and spur gear 38 housed in the housing 22. A through hole 30 is provided in the center of the cover plate 29 to allow the square shaft 39 of the spur gear 38, which will be described later, to pass through, and a guide groove 31 is provided below the rear side of the cover plate 29 to guide the screen 2 to the screen outlet 10.

The operating cord 16 is a flexible cord formed by connecting a number of ball members 17 at regular intervals with connecting strips 18, with both ends not connected to each other and having a first end 16a and a second end 16b. The operating cord 16 is wound around a pulley 34 so that the first end 16a and the second end 16b of the operating cord 16 are located on the front and back sides of the roller blind device 1. The first end 16a of the operating cord 16 is provided with a grip 19 for holding when manually pulling the operating cord 16. Meanwhile, the second end 16b of the operating cord 16 is housed in the second chamber 43 of the first frame 5, as described below.

The rotation transmission mechanism 7 has a pulley 34 as a rotation transmission body that rotates when the first end 16a of the operating cord 16 is pulled, and a speed change mechanism 35 that transmits the rotational motion of the pulley 34 to the winding shaft 3 at a predetermined rotation ratio greater than 1, thereby making the rotational speed of the winding shaft 3 greater than the rotational speed of the pulley 34. The pulley 34 is formed in an annular shape, and an annular outer circumferential groove 36 for winding the operating cord 16 is provided on its outer circumferential surface 34a, and an internal gear 37 consisting of multiple teeth is formed on its inner circumferential surface 34b. In addition, the outer circumferential groove 36 has multiple engaging pieces 36a at equal intervals for engaging the ball member 17 of the operating cord 16. The pulley 34 is arranged on the axis L2 and is housed in the housing 22.

The speed change mechanism 35 of this embodiment is composed of an internal gear 37 formed on the inner peripheral surface of the pulley 34, and a spur gear 38 arranged on the inner peripheral side of the pulley 34 and meshing with the internal gear 37. A rectangular parallelepiped square shaft 39 is erected on the inner surface 38a (the surface facing the winding cap 3b) of the spur gear 38, and the square shaft 39 is fitted into the fitting hole 3d of the winding cap 3b. This fitting connects the spur gear 38 and the winding shaft 3, and this connection allows the spur gear 38 and the winding shaft 3 to rotate together. In addition, an engagement hole 40 for engaging the support member 26 is provided in the center of the outer surface 38b (the surface facing the cap body 21) of the spur gear 38, and by engaging the support member 26 with this engagement hole 40, the support member 26, the square shaft 39 of the spur gear 38, and the winding shaft 3 are arranged on the same axis L1.
In addition, the number of teeth of the internal gear 37 of the pulley 34 is 34, and the number of teeth of the spur gear 38 is 14, so the rotation ratio (gear ratio) of the spur gear 38 to the pulley 34 is approximately 2.4. Therefore, when the pulley 34 rotates once, the spur gear 38 and the winding shaft 3 rotate approximately 2.4 times in the same direction as the rotation direction of the pulley 34.

Next, the frames 5 and 6 will be described. The frames 5 and 6 are composed of a first frame 5 connected to an end (left end in FIG. 1) of the winding box 4 where the first side end of the winding shaft 3 is disposed, and a second frame 6 connected to an end (left end in FIG. 1) of the winding box 4 where the second side end of the winding shaft 3 is disposed, the first frame 5 extending downward from the left end of the rear side of the winding box 4, and the second frame 6 extending downward from the right end of the rear side of the winding box 4. The first frame 5 and the second frame 6 are hollow frames having openings 5a and 6a at the upper ends, which are the ends on the winding box 4 side, respectively, and have a rectangular cross-sectional shape. In addition, partitions 41, 41 are provided inside the first frame body 5 and the second frame body 6, respectively, extending in the longitudinal direction of the first frame body 5 and the second frame body 6 (the up-down direction in Figure 1), and these partitions 41 divide the inside of the first frame body 5 and the second frame body 6 into a first chamber 42 that faces the screen 2 and extends in the up-down direction of the first frame body 5 and the second frame body 6, and a second chamber 43 that is provided outside the first chamber 42 and extends in the up-down direction of the first frame body 5 and the second frame body 6.

The opposing side walls 5b, 6b of the first frame 5 and the second frame 6 have slits 11, 12 extending in the vertical direction and slidably engaging the engaging member 9 of the screen 2 so as not to be removed. These slits 11, 12 communicate with the first chamber 42 of the first frame 5 and the second frame 6, so that the head of the engaging member 9 is slidably accommodated in the first chamber 42. The second chamber 43 of the first frame 5 is configured so that the second end 16b of the operating cord 16 can be accommodated in the second chamber 43 through the opening 5a and moved in its length direction (vertical direction in FIG. 1). That is, the first frame 5 is arranged so that the outer peripheral surface 34a on the back side of the pulley 34 is located on the upper extension line of the second chamber 43, and preferably the back side end of this outer peripheral surface 34a is located on the upper extension line of the second chamber 43. With this configuration, the second end 16b of the operating cord 16 is guided by the guide member 27 and accommodated in the second chamber 43. At this time, the width of the cord introduction path 44 formed by the guide member 27 and the rear end 24a of the outer peripheral wall 24 is formed to be slightly larger than the diameter of the ball member 17.

Next, the opening and closing of the screen in the roller blind device 1 of this embodiment will be described. The roller blind device 1 of this embodiment is a device in which the screen 2 is wound onto the winding shaft 3 by operating the operating cord 16, thereby opening the screen 2, and the screen 2 is unwound from the winding shaft 3 by the weight of the movable crosspiece 8, thereby closing the screen 2. The operation of opening the screen 2 is performed by operating the first end 16a side of the operating cord 16 to rotate the pulley 34, and the rotational force of this pulley 34 is transmitted to the winding shaft 3 via the spur gear 38, and the screen 2 is wound onto the winding shaft 3. At this time, the winding shaft 3, spur gear 38, and pulley 34 all rotate in the same direction, and the winding shaft 3 rotates approximately 2.4 times for each rotation of the pulley 34. Then, as the winding shaft 3 rotates, the screen 2 is wound up and placed in an open state. In this state, the ball member 17 of the operating cord 16 is fitted into the locking hole 28b, whereby the ball member 17 is locked into the locking hole 28b, and the screen 2 is maintained in an open state.

On the other hand, the screen 2 is closed by being unwound by the weight of the movable crosspiece 8. When the engagement between the locking hole 28b and the ball member 17 is released while the screen 2 is open, the downward force of the weight of the movable crosspiece 8 rotates the winding shaft 3 in the opposite direction to when the operating cord 16 is operated. This rotation unwinds the screen 2 from the winding shaft 3, and the screen 2 is closed.

Thus, according to the roller blind device 1 of this embodiment, the pulley 34 is rotated by pulling the first end 16a of the endless operating cord 16, and the speed change mechanism 35 makes the rotation speed of the winding shaft 3 greater than the rotation speed of the pulley 34, thereby eliminating the need to select the rotation direction of the operating cord 16 when using an endless operating cord, and preventing the operating cord 16 from becoming longer. Moreover, since the second end 16b of the operating cord 16 is housed in the second chamber 43 of the frame body 5, there is no need to select between the first end 16a and the second end 16b when operating the operating cord 16, and it can be operated reliably.

The roller blind device according to the present invention has been described above, but it goes without saying that the present invention is not limited to the above embodiment and various design changes are possible within the scope of the claims. For example, in this embodiment, the pulley 34 is used as the rotation transmission body, but a sprocket may be used instead of the pulley 34. In addition, in this embodiment, the spur gear 38 that meshes with the internal gear 37 formed on the inner periphery side of the pulley 34 is used as the speed change mechanism 35, but this is not limited. For example, instead of the internal gear 37 of the pulley 34, a spur gear that rotates together with the pulley may be provided, and a gear such as a spur gear or an internal gear that meshes with the spur gear and rotates together with the winding shaft may be used. In this case, the spur gear that rotates together with the pulley and the gear that rotates together with the winding shaft correspond to the speed change mechanism.

In addition, in this embodiment, a vertical-opening type roll screen device that opens and closes the screen in the vertical direction is described, but the present invention can also be applied to a horizontal-pulling type roll screen device that opens and closes the screen in the left-right direction. In this case, the winding shaft is supported rotatably around an axis that extends in the vertical direction, and the first and second frames provided at both ends of the winding box extend in the left-right direction, and the screen opens when the first end of the operating cord is operated, and closes when the movable bar is grasped and operated in the direction to unwind the screen.

1 Roll screen device 2 Screen 3 Winding shaft 4 Winding box 5 Frame (first frame)
5a (first frame) opening 6 frame (second frame)
6a (of the second frame) opening 7 rotation transmission mechanism 8 movable bar 9 engagement members 11, 12 slit 16 operation cord 16a first end 16b second end 23 cord outlet path 34 pulley (rotation transmission body)
35 Speed change mechanism 38 Spur gear 42 First chamber 43 Second chamber L1 Axis line (of winding shaft) L2 Axis line (of pulley)

Claims (7)

A winding shaft supported so as to be rotatable about an axis line;
A winding box in which the winding shaft is housed;
a screen that can be wound and unwound on the winding shaft by rotation of the winding shaft;
A roll screen device configured such that, as the screen is wound around the winding shaft, the screen is stored in the winding box, and as the screen is unwound from the winding shaft, the screen is led out from within the winding box,
a rotation transmission mechanism connected to one end of the winding shaft in the winding box and configured to rotate the winding shaft;
an operating cord connected to the rotation transmission mechanism,
the operating cord is formed in a manner having a first end and a second end without both ends being connected to each other, and the first end side is led out from inside the winding box to the outside,
A hollow frame extending in a direction perpendicular to the axis is connected to an end of the winding box where the rotation transmission mechanism is disposed,
The inside of the frame is divided into a first chamber and a second chamber by a partition wall extending in the longitudinal direction of the frame,
The frame has a slit extending in the longitudinal direction thereof and communicating with the first chamber of the frame,
An engagement member attached to a side edge of the screen facing the frame is slidably engaged with the slit,
An opening is formed in an end surface of the frame body on the winding box side, and a second end side of the operating cord is movably accommodated in the second chamber through the opening of the frame body,
A roller blind device, characterized in that the winding shaft rotates through the rotation transmission mechanism by pulling the first end side of the operating cord. The roller blind device described in claim 1, characterized in that the rotation transmission mechanism includes a rotation transmission body around which the operating cord is wound and which rotates when the operating cord is pulled, and a speed change mechanism that transmits the rotational motion of the rotation transmission body to the winding shaft at a predetermined rotation ratio greater than 1, thereby making the rotational speed of the winding shaft greater than the rotational speed of the rotation transmission body. the rotation transmission body is a pulley formed in an annular shape and supported rotatably about an axis extending parallel to the axis,
The roller blind device according to claim 2, characterized in that the speed change mechanism is composed of an internal gear formed on the inner surface of the pulley and a spur gear that meshes with the internal gear and is coaxially connected to the winding shaft. 4. The roller blind device according to claim 3 , wherein the outer peripheral surface of the pulley on the rear side is disposed on an extension of the frame. the winding box has a locking portion for holding the operation cord pulled out from the winding box at an arbitrary pulled-out position by a pulling operation,
The operating cord is formed by connecting a plurality of ball members at regular intervals by flexible connecting strips,
A roller blind device as described in any one of claims 1 to 4, characterized in that the ball member is capable of being engaged and disengaged with the locking portion, and when the ball member is engaged with the locking portion, the operating cord is held in any pull-out position. The roller blind device has a cord outlet path for leading out a first end side of the operating cord to the outside,
The roller blind device according to claim 5, characterized in that the locking portion is a locking hole cut into the cord guide path and open toward the outside, and the width of the locking hole is smaller than the diameter of the ball member of the operating cord and larger than the diameter of the connecting strip. A fitting comprising the roller blind device according to any one of claims 1 to 6 .

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