JP7328867B2 - Shielding device - Google Patents

Description

The present invention relates to a shielding device, for example a roll screen.

Conventionally, in shielding devices such as roll screens and blinds, shielding materials are raised and lowered by means of operation codes.

For example, in Patent Document 1 below, both ends of a winding pipe are rotatably supported by side plates provided at both ends of a set frame, one end of a screen is connected to the winding pipe so as to be wound or unwound, and a screen is wound. A roll screen is disclosed as a shielding device in which an operating cord is wound around a wheel that can rotate integrally with the winding pipe at one end of the pipe.

Furthermore, in the technique of Patent Document 1, an end cap is fitted to one end of the winding pipe, and a support shaft is fixed so as to pass through the end cap from the side plate, and is fitted to the support shaft so as not to rotate relative to each other. A wheel is rotatably supported on the mated sleeve, and a projection is integrally formed on the wheel toward the end cap. It is designed to transmit rotation to the cap.

According to this, when one side of the operating cord is pulled, the winding pipe is rotated in the screen rewinding direction via the wheel, thereby lowering the screen, and when the other side of the operating cord is pulled, the screen is wound via the wheel. By rotating the winding pipe in the screen winding direction, the screen rises, and the rotation of the winding pipe due to the weight of the screen is prevented by the engagement of the clutch spring, and the screen descends due to its own weight. When pulling the operation cord is stopped, the screen stops at the height when the operation is stopped, so the screen can be easily stopped at the desired elevation height.

Utility Model Registration No. 2531959

However, in the technique described in Patent Document 1, in order to raise the screen to the upper limit position where the screen is completely wound by operating the operation cord, the operation cord is continuously pulled until the lower end of the screen reaches the upper limit position. It was necessary to continue, and there was a problem with operability.

In view of the circumstances as described above, an object of the present invention is to provide a shielding device capable of improving operability when opening and closing the shielding material.

To achieve the above object, a shielding device according to one aspect of the present invention comprises: a support member attached to a fixed surface; a rotor rotatably supported by the support member; a member, a shielding member that can be moved up and down by the rotation of the rotating body by operating the operating member, and a driving means that is connected to the operating member and transmits the driving force of the operating member to the rotating body. The driving means has an urging member that imparts an urging force to the rotating body in the upward direction of the shielding member. The biasing member is actuated when the shielding material rises to a predetermined height that is before the upper limit position of the rising operation, and the shielding material is moved to the upper limit by the biasing force of the biasing member regardless of the operation of the operating member. Raise to position.

According to this configuration, the shielding material is raised by continuous operation of the operating member, and when the raised position of the shielding material reaches a predetermined height before the upper limit position, the biasing member is activated without operating the operating member. The shielding material can be automatically raised to the upper limit position, improving operability. The biasing member is, for example, a spring, a weight, or the like, but is not limited to this. The predetermined height is, for example, a position approximately 450 mm below the lower end of the support member, but is not limited to this.

The driving means may have a support shaft, an input member to which the driving force is transmitted from the operating member, and a clutch member coupled to the biasing member and engaged with the support shaft. good. In this case, the biasing member may be actuated by disengaging the clutch member and the support shaft through the input member by operating the operating member.

According to this configuration, the biasing member can be operated by switching the clutch member via the input member in accordance with the operation of the operating member.

The clutch member has an engaging portion engageable with the engaged portion formed on the support shaft, and a clutch case interlocked with the biasing member and pivotally supported on the support shaft. You may In this case, the clutch case is rendered non-rotatable relative to the support shaft by engaging the engaging portion with the engaged portion, and the engaging portion is disengaged from the engaged portion. , and may be relatively rotatable with respect to the support shaft.

According to this configuration, by interlocking the biasing member with the clutch case, when the clutch case is engaged, biasing force can be accumulated in the biasing member, and the engagement of the clutch case is released. At times, the biasing force of the biasing member can be released.

The driving means may have a moving member movable along the support shaft. In this case, the input member may transmit a driving force for moving the moving member in the direction of the support shaft. In this case, the biasing member may be operated by operating the operation member to move the moving member along the support shaft via the input member, and by switching the clutch member by the moving member. .

According to this configuration, the "predetermined height" at which the urging member operates can be made constant by switching the clutch member by the moving member that moves along the support shaft in accordance with the operation of the operating member.

The shielding device may further comprise a pulley for transmitting operation of the operating member to the input member. In this case, the support shaft may be a screw shaft, and the input member may be a cylindrical body capable of accommodating the screw shaft and the moving member therein. In this case, the cylindrical body has a convex portion or a concave portion that engages with the moving member, and when the cylindrical body rotates, the moving member engaged with the convex portion or the concave portion moves on the screw shaft. You may

Further, instead of the screw shaft, the support shaft may be engaged with the movement member so that the movement member can slide in the direction of the support shaft. In this case, the moving member has a male thread on its outer peripheral surface, and the cylindrical body has a female thread that engages with the male thread on its inner peripheral surface. The moving member may move on the support shaft.

According to these configurations, as the operation member is operated, the rotation is transmitted to the input member via the pulley, and the driving force is not directly transmitted from the rotating body to the input member. The biasing force of the biasing member can be transmitted to the rotating body without being affected by the weight of the material.

The drive means may have deceleration means connected to the biasing member for decelerating the rising speed of the shielding material due to the biasing force.

According to this configuration, the deceleration means can decelerate the automatic ascent speed by the biasing member, thereby improving safety and security.

The deceleration means may have a brake case connected to the biasing member and a brake main body accommodated in the brake case. In this case, the clutch case may be engaged with the brake case so as to be relatively movable in the support shaft direction and to be integrally rotatable.

According to this configuration, the braking force can be applied to the clutch case without restricting the movement of the clutch member in the axial direction, and the brake main body can be accommodated compactly.

The operating member may be an endless cord or chain partially having a trigger member. In this case, the driving means capable of transmitting the driving force to the operating member operates the biasing member when the case, the biasing member movable along the case, and the trigger member come into contact with each other. and a switch that enables In this case, at least a part of the operating member may be inserted through the case, and the biasing member may transmit the driving force to the operating member when the trigger member and the switch come into contact with each other. .

According to this configuration, the driving means is not built in the mechanism portion of the shielding device, but is provided in the moving portion of the chain, which is the operation member, so that the function of improving the operability can be added to the existing shielding device.

The rotating body may be a winding pipe. In this case, the shielding material may be lifted by being wound up by the rotation of the winding pipe.

According to this configuration, the shielding device can be realized as a roll screen, a shutter, or the like for winding the shielding material around the winding pipe.

The rotating body may be a winding drum. In this case, the shielding material may be lifted by winding an elevating cord, one end of which is connected to a part of the shielding material, around the winding drum.

According to this configuration, the shielding device can be realized as a venetian blind, a pleated screen, a honeycomb screen, a Roman shade, or the like, in which the shielding material is lifted by winding the lifting cord around the drum.

A shielding device according to another aspect of the present invention includes a support member attached to a fixed surface, a rotating body rotatably supported by the supporting member, an operating member capable of rotationally driving the rotating body, and the operating member. and a driving means connected to the operating member for transmitting the driving force of the operating member to the rotating body. The driving means has an urging member that imparts an urging force in the opening or closing direction of the shielding member to the rotating body. The biasing member is actuated when the shielding member opens and closes to a predetermined position that is before the open limit position or the close limit position of the opening/closing operation, and is operated by the biasing force of the biasing member regardless of the operation of the operating member. The shielding material is opened and closed to the open limit position or the closed limit position.

According to this configuration, the shielding member is opened or closed by continuous operation of the operating member, and when the shielding member reaches a predetermined position before the open limit position or the closed limit position, the operating member does not need to be operated. Also, the urging member can automatically open or close the shielding material to the limit position, improving the operability.

As described above, according to the present invention, it is possible to improve the operability when opening and closing the shielding material. However, this effect does not limit the invention.

1 is a partially transparent front view of a roll screen according to an embodiment of the present invention; FIG. 1. It is front side sectional drawing in the winding pipe which the roll screen of FIG. 1 has. They are an AA cross-sectional view, a BB cross-sectional view, a CC cross-sectional view, a DD cross-sectional view, and an EE cross-sectional view of FIG. It is an exploded perspective view of the drive means which the said roll screen has. It is a partially exploded perspective view of the said drive means. It is a perspective view of the said drive means. Fig. 3 is a perspective view of the main part of the roll screen including the driving means; It is a front sectional view showing the operation of the driving means. It is the figure which showed the operation|movement of the clutch member of a drive means at the time of raising operation of the said roll screen. It is the figure which showed the operation|movement of the clutch member of a drive means at the time of downward operation of the said roll screen. Fig. 10 is a partially transparent front view of a honeycomb screen according to a second embodiment of the present invention; It is a partially transparent front view and side view of a roll screen according to a third embodiment of the present invention. It is the figure which showed the operation|movement of the drive means of the roll screen which concerns on 3rd Embodiment of this invention. It is the figure which showed the operation|movement of the drive means which concerns on the modification of the roll screen which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First embodiment>
First, a first embodiment of the present invention will be described.

[Roll screen configuration]
FIG. 1 is a partially transparent front view of a roll screen according to this embodiment.

As shown in the figure, the roll screen 100 according to the present embodiment includes a set frame 1 as a support member, a winding pipe 2 as a rotating body supported by the set frame 1, a chain 3 as an operation member, and It has a pulley 4, a screen 5 as a shielding material, and a driving means 10 for driving the rotating body.

The set frame 1 has a horizontally elongated rectangular parallelepiped shape, and is attached to the ceiling, wall, or the like with screws or the like via brackets 9 in order to install the roll screen 100 in an opening such as a window frame or a bay window of a building. Side plates 16 are provided at both ends of the set frame 1 , and the winding pipe 2 is rotatably supported by the side plates 16 .

One end of the screen 5 is connected to the winding pipe 2 so as to be wound up. The other end side of the screen 5 is connected to the weight bar 7 .

One end of the winding pipe 2 is provided with the chain 3 and the pulley 4 for rotating the winding pipe 2 . The chain 3 is formed in an annular shape (endless) and is wound around the outer periphery of the pulley 4 , and the pulley 4 is attached to the side plate 16 . The screen 2 can be raised and lowered in the Y direction in the figure by rotating the winding pipe 2 by operating the chain 3 .

A driving means 10 is connected to the chain 3 and the pulley 4 and transmits the rotational driving force thereof to the winding pipe 2 . The driving means 10 has a winding spring 6 as an urging member that applies an urging force (winding force) to the winding pipe 2 in the upward direction of the screen 2 .

Although the details will be described later, the take-up spring 6 operates when the screen 2 rises to a predetermined height before the upper limit position of the upward movement (the position where the weight bar 7 contacts the set frame 1). It is possible to automatically raise the screen 5 to the upper limit position by the urging force of the winding spring without depending on the operation.

The other end of the winding pipe 2 is provided with an auxiliary spring 8 for reducing the operating load when the screen 2 is raised.

[Configuration of drive means]
Next, the details of the driving means 10 will be described. FIG. 2 is a front cross-sectional view of the inside of the winding pipe of the roll screen. 3 is a cross-sectional view along AA (A in FIG. 2), a cross-sectional view along B-B (B in FIG. 2), a cross-sectional view along C-C (C in FIG. 2), and a cross-sectional view along DD (D in FIG. 2). ) and a cross-sectional view along EE (E in the same figure). 4 is an exploded perspective view of the driving means 10, FIG. 5 is a partially exploded perspective view of the driving means 10, and FIG. 6 is a perspective view of the driving means 10. As shown in FIG. FIG. 7 is a perspective view of the main part inside the winding pipe 2 of the roll screen 100 including the driving means 10. As shown in FIG.

As shown in these figures, the driving means 10 has a cylindrical body 12 as an input member to which the driving force is transmitted from the chain 3 and pulley 4 . The cylindrical body 12 includes a screw shaft 11 that extends in the X direction in each figure and is fixedly supported via a shaft 21 on a fixed shaft 17 fixed to a side plate 16, The member 13 is accommodated inside, and a driving force for moving the moving member 13 in the direction of the screw shaft 11 (X direction) is transmitted.

More specifically, the cylindrical body 12 has a convex portion 12a on its inner peripheral surface that engages with the moving member 13, and the moving member 13 has a concave portion 13a that engages with the convex portion 12a. Further, the screw shaft 11 has a male screw threadedly engaged with the inner peripheral surface of the moving member 13 on its surface. As the cylindrical body 12 rotates, the moving member 13 engaged by the convex portion 12 a and the concave portion 13 a moves on the screw shaft 11 . Since the moving member 13 moves as the screen 2 is raised and lowered, the screw shaft 11 also functions as means for detecting the raised position and lowered position of the screen 2 .

The pulley 4 is rotatably supported by the fixed shaft 17 and partially housed in a wheel case 18 . A clutch spring 19 is provided between the fixed shaft 17 and the wheel case 18 . The biasing force of the clutch spring 19 prevents the winding pipe 2 from rotating due to the weight of the screen 5 (weight bar 7) and the screen 2 from being unwound. Around the wheel case 18 is connected an adapter 22 that fits the end of the winding pipe 2 .

The wheel case 18 is connected to the winding pipe 2 via the adapter 22 so as to be able to transmit rotation, and is connected to the cylindrical body 12 via the connector 20 so as to be able to transmit rotation.

Rotation from the pulley 4 is transmitted to the winding pipe 2 via the wheel case 18 and the adapter 22 by loosening the clutch spring 19 . On the other hand, rotation from the winding pipe 2 tightens the clutch spring 19 through the adapter 22 and the wheel case 18, thereby restricting the rotation of the winding pipe 2.

The drive means 10 also has a clutch member 14 connected to the take-up spring 6 and engaged with the screw shaft 11 on the opposite side of the cylindrical body 12 from the pulley 4 . The clutch member 14 is interlocked with the take-up spring 6 to switch the connection between the take-up spring 6 and the pulley 4 (holding and transmission of the biasing force of the take-up spring 6) at a fixed position.

As shown in FIGS. 4 and 5, the screw shaft 11 has, for example, a recessed engaged portion 11a on the opposite side of the pulley 4. As shown in FIG. The clutch member 14 has an engaging portion 141 that can be engaged with the engaged portion 11 a , and a clutch case 142 that interlocks with the take-up spring 6 and is supported on the screw shaft 11 .

More specifically, as shown in FIG. 3D, the engaging portion 141 has, for example, an H-shaped (S-shaped) shape and is rotatably supported by the clutch case 142. It can be engaged with the engaged portion 11a.

The clutch case 142 is made non-rotatable relative to the screw shaft 11 by engaging the engaging portion 141 with the engaged portion 11a. In addition, the clutch case 142 is configured such that the moving member 13 that moves along the screw shaft 11 is engaged with the engaging portion 141 so that the engaging portion 141 is disengaged from the engaged portion 11a. relative rotation is possible.

Further, as shown in FIGS. 2 to 4, at the tip of the moving member 13 in the X direction, a concave portion of the engagement portion 141 of the clutch member 14 protruding in the X direction is opposite to the convex portion of the rotation end. A pin 131 that engages with is provided integrally.

In the take-up spring 6, the moving member 13 moves along the screw shaft 11 through the cylindrical body 12 by the operation of the chain 3, and the pin 131 of the moving member 13 engages the engaging portion 141 of the clutch member 14. is disengaged from the engaged portion 11a of the screw shaft 11. In other words, the engagement of the engaging portion 141 with the engaged portion 11 a of the screw shaft 11 restricts the release of the winding spring 6 .

In this manner, the moving member 13 that moves along the screw shaft 11 switches the clutch member 14 in accordance with the operation of the chain 3, so that the "predetermined height" at which the winding spring 6 operates can be made constant. can.

Further, as described above, the structure is such that the rotation is transmitted to the cylindrical body 12 via the pulley 4 as the chain 3 is operated, and the driving force is not transmitted directly from the winding pipe 2 to the cylindrical body 12. Thus, the biasing force of the winding spring 6 can be transmitted to the winding pipe 2 without being affected by the weight of the screen 5 itself.

The driving means 10 further includes a brake 15 as decelerating means that is connected to the winding spring 6 and applies a braking force to the winding spring 6 to reduce the upward speed of the screen 5 due to the biasing force. The brake 15 also has the function of keeping the speed of automatic winding of the screen 5 by the winding spring 6 constant.

The brake 15 has a brake body 151 and a brake case 152 that accommodates the brake body. The brake body 151 is an oil damper, and the brake case 152 connects the clutch case 142 and the take-up spring 6 via the brake body 151 . As shown in FIGS. 3E and 5, the clutch case 142 is engaged with the brake case 152 so as to be relatively movable in the direction of the screw shaft 11 (X direction) and to be integrally rotatable.

By making the brake 15 have such a structure, it is possible to apply a braking force to the clutch case 142 without restricting the movement of the clutch member 14 in the X direction, thereby improving safety and a sense of security when the screen 5 is automatically raised. At the same time, the brake main body 151 can be accommodated compactly.

As shown in FIGS. 2 and 7, the take-up spring 6 is supported around a support pipe 61 and locked by a fixed end 62 . The fixed end 62 is prevented from rotating by an adjusting tool to which the shaft is fixed, and also serves as torque adjusting means for the take-up spring 6 .

[Operation of roll screen]
Next, the operation of the roll screen 100 configured as described above will be described. FIG. 8 is a cross-sectional view of the front side (Z direction) showing the operation of the driving means 10 when the roll screen 100 is raised. FIG. 9 is a side (X direction) cross-sectional view showing the operation of the clutch member 14 of the driving means 10 during the upward operation, and FIG. 10 is a clutch of the driving means 10 during the downward operation of the roll screen 100. FIG. 4 is a side (X-direction) cross-sectional view and an external view showing the operation of the member 14; 9 and 10, each of A1 to D1 shows the cross section of the cylindrical body 12, and each of A2 to D2 shows the appearance of the chain 3 and the screen 5. As shown in FIG.

First, the upward movement of the roll screen 100 will be described.

As shown in FIGS. 8A and 9A, first, while the user is lifting the screen 5 by operating the chain 3 (black arrow in FIG. 9), the rotation of the pulley 4 causes the clutch spring 19 to loosen and the wheel to rotate. It is transmitted to the connector 20 via the case 18 . Rotation from the connector 20 (the solid line arrow in the direction of rotation in FIG. 8) is input to the cylindrical body 12, and as the cylindrical body 12 rotates (the broken line arrow in the direction of rotation in FIG. 8), the moving member 13 rotates. 8 Move to the left (left arrow in FIG. 8). Along with this lifting operation, the pin 131 of the moving member 13 approaches the clutch member 14 while rotating.

Subsequently, as shown in FIGS. 8B and 9B, when the chain 3 is operated to raise the screen 5 to a predetermined height H before the upper limit position, which is the limit position of the upward movement (white outline in FIG. 9). arrow), the pin 131 of the moving member 13 contacts the engaging portion 141 of the clutch member 14 .

Subsequently, as shown in FIG. 9B', the rotation of the pin 131 pulls the rotating end of the engaging portion 141 up to the pin 131, disengages the screw shaft 11 from the engaged portion 11a, and disengages the clutch. Fixation of the case 142 is released. As a result, movement of the pin 131 is restricted, and the pin 131 is connected to the take-up spring 6 and the brake 15 via the engaging portion 141 of the clutch member 14 .

Then, as shown in FIGS. 8C and 9C, even if the user stops operating the chain 3, the urging force of the take-up spring 6 pulls the cylindrical body 12, the connector 20, the wheel case 18 and the adapter 22 out of the clutch case 142. Rotation is transmitted to the winding pipe 2 via the screen 5, and the screen 5 starts to automatically rise from a predetermined height H.

Here, the difference between the upper limit position and the predetermined height H (length of automatic rise) is, for example, 450 mm, which corresponds to about three rotations of the winding pipe 2 . With such a length, the user can feel that the screen 5 is automatically raised regardless of the user's own operation. However, the length is not limited to this.

8D and 9D, the rotation of the clutch case 142 is transmitted to the brake case 152, so that the screen 5 is wound without operating the chain 3 while the braking force is applied by the brake 15. The winding pipe 2 is rotated by the biasing force of the spring 6 and automatically raised to the upper limit position, and the pin 131 follows the rotation of the engaging portion 141 of the clutch member 14 .

At this time, the brake 15 significantly reduces the impact noise when the weight bar 7 hits the lower end of the set frame 1 . In addition, the user's operation becomes heavy due to the rotational resistance of the brake, and the user feels as if the chain 3 and the screen 5 are being pulled.

At this time, as shown in FIG. 9D, when the screen 5 automatically rises to the upper limit position, the take-up spring 6 is not completely released from the biasing force, and the biasing force remains. A force that tends to rotate counterclockwise in the figure acts on the engaging portion 141 , and the pin 131 stops with its clockwise rotation restricted by the engaging portion 141 .

Next, the downward movement of the roll screen 100 will be described.

First, as shown in FIG. 10A, when the screen 5 is stopped at the upper limit position, the user operates the chain 3 in the downward direction (black arrow in the figure), and when the screen 5 starts to descend (white arrow in the figure) ), the pin 131 of the moving member 13 rotates clockwise together with the clutch member 14, as shown in FIG. 10B. At this time, biasing force is accumulated in the winding spring 6 due to the clockwise rotation of the clutch member 14 .

Subsequently, as shown in FIG. 10C, when the user further lowers the chain 3, the screen 5 is lowered to the predetermined height H described above.

Then, as shown in FIG. 10C', the tip of the engaging portion 141 of the clutch member 14 is engaged with the engaged portion 11a of the screw shaft 11. As shown in FIG.

Then, when the user continues to lower the chain 3 further, as shown in FIG. begin to rotate. As a result, the screen 5 descends according to the amount of operation, and the release of the winding spring 6 is restricted with the urging force stored therein.

[summary]
As described above, according to the present embodiment, the user continuously operates the chain 3 to raise the screen 5, and the screen 5 rises to a predetermined height H (immediately before the end of winding) before the upper limit position. When it reaches the upper limit, the winding spring 6 can automatically raise the screen 5 to the upper limit position without operating the chain 3, so that the operability is improved.

<Second embodiment>
Next, a second embodiment of the invention will be described. In this embodiment and subsequent embodiments, portions having the same functions as those of the first embodiment are denoted by the same reference numerals.

In this embodiment, the present invention is applied to a honeycomb screen instead of the roll screen 100 described above. FIG. 11 is a partially transparent front view of the honeycomb screen according to this embodiment.

As shown in the figure, the honeycomb screen 200 has a plurality of winding drums 25 as rotating bodies inside the head box 30 instead of the winding pipe 2 of the first embodiment.

A shaft 28 can be interlocked with the winding drum 25, and the winding drum 25 and the shaft 28 are integrally rotatably supported.

Although not shown, inside the winding drum 25, a screw shaft 11, a cylindrical body 12, a moving member 13, a clutch member 13, and a brake 15 similar to those of the first embodiment are provided.

Further, the screen 29 in this embodiment is a honeycomb screen formed by connecting a plurality of cylindrical cells having a hexagonal cross section in the Y direction of the figure so as to be able to be folded and unfolded. The material of the screen 29 is made of, for example, a material that does not transmit light, but may be made of a see-through material.

A lifting cord 26 insertion hole (not shown) is formed inside the screen 29, and the lifting cord 26 suspended from the set frame 1 is inserted through the lifting cord insertion hole. The upper end of the lifting cord 26 is connected to the winding drum 25 inside the head box 30 so as to be capable of winding and unwinding, and the other end of the lifting cord 26 is connected to the bottom rail 40 .

By operating the chains 3 by the user, the lifting cords 26 are lifted and the bottom rails 40 are lifted, whereby the screen 29 can be expanded and contracted. In this embodiment, the same driving means 10 as described above is used for automatically winding the lifting cord 26 onto the winding drum 25 .

Further, in this embodiment, for example, between the winding drum 25 closest to the pulley 4 among the plurality of winding drums 25 and the pulley 4, an interlocking gear 27 coaxially rotatable with the winding drum 25, which is a rotating body, is provided. is provided. The rotation of the interlocking gear 27 is transmitted to the other winding drums 25 via the shaft 28, thereby synchronizing the rotations of the plurality of winding drums 25. As shown in FIG.

In this embodiment, when the screen 29 is folded from the unfolded state as shown in FIG. 11, when the user operates the chain 3 to rotate the lifting cord 26 in the winding direction, the shaft 28 and the winding drum 25 rotate together. Then, the winding drum 25 winds up the lifting cord 26, the bottom rail 30 rises, and the screen 29 is sequentially folded from the lowest cell to the upper end cell.

When the user further operates the chain 3 to raise the bottom rail 30 to a predetermined height H before the upper limit position, which is the limit position of the upward movement, the driving means 10 is lifted as in the first embodiment. , the winding spring 6 is actuated, and the lifting cord 26 is automatically wound on the winding drum 25 to the upper limit position.

As described above, even when the winding drum 25 is employed as the rotating body, the operation of the winding spring 6 by the driving means 10 enables automatic winding of the lifting cord 26 (automatic lifting of the screen 29) from the predetermined height H. becomes.

<Third Embodiment>
Next, a third embodiment of the invention will be described. FIG. 12 is a partially transparent front view and a side view of the roll screen according to the present embodiment, and FIG. 13 is a side partial cross-sectional view showing the operation of the driving means of the roll screen according to the present embodiment. .

As shown in both figures, the roll screen 300 according to this embodiment has a drive means 10 connected to the chain 3 .

That is, as shown in FIG. 12, the driving means 10 in this embodiment includes a case 51 in the shape of a vertically elongated rectangular parallelepiped, which is mounted on a fixed surface such as a wall through which the chain 3 is inserted, and a case 51 provided on a part of the chain 3, such as and a cylindrical trigger member 52 .

Further, as shown in FIG. 13, the driving means 10 includes a weight 55 as an urging member movable along the case 51 and a switch 54 capable of operating the weight 55 when the trigger member 52 comes into contact. have.

In addition, a trigger cap 53 is provided in the case 51 so that the chain 3 is inserted therethrough and the trigger cap 53 can be raised and lowered in conjunction with the trigger member 52 by contacting the upper end of the trigger member 52 . The trigger cap 53 is held by a holder 53 a fixed inside the case 51 when it is not in contact with the trigger member 52 .

The switch 54 has, for example, a plate-like or bar-like shape bent at an obtuse angle. The weight 55 is provided on the bottom surface of the switch 54 .

In the case 51, for example, two guide grooves 56 are formed substantially parallel to each other. The switch 54 is engaged so as to be guided by both guide grooves 56 via two shafts protruding in the X direction of the figure, for example. The guide groove 56 has a curved upper end portion and a linear shape in other portions.

The lifting operation of the roll screen 300 configured in this way will be described.

First, as shown in FIG. 5A, while the screen 5 is ascending, the trigger member 52 is not in contact with the switch 54, and the switch 54 does not operate the weight 55. It is locked to the bent end of the groove 56 .

When the user further operates the chain 3 from this state, the trigger member 52 rises, and as shown in FIG. When the trigger cap 53 abuts, the trigger cap 53 leaves the holder 53 a and rises together with the trigger member 52 .

Then, as shown in FIG. 4C, the trigger member 52 comes into contact with the switch 54 via the trigger cap 53, and pushes the weight 55 from the bent portion of the guide groove 56 toward the straight portion. At this time, the switch 54 rotates counterclockwise in the drawing from the bent portion toward the straight portion.

As a result, the weight 55 is lowered by its own weight along the guide groove 56 as shown in FIG. By transmitting the driving force to the chain 3 engaged with , the chain 3 is pulled downward by a length corresponding to the length indicated by the white arrow in the figure, and the screen 5 automatically rises to the upper limit position accordingly. do.

As described above, according to the present embodiment, the driving means 10 is not built in the mechanism portion in the set frame 1 of the roll screen 300, but is provided in the moving portion of the chain 3, so that the existing roll screen has a function of improving operability. can be easily added.

<Modified example of the third embodiment>
FIG. 14 is a diagram showing the operation of the driving means 10 according to a modification of the roll screen 300 according to the third embodiment.

As shown in the figure, in this embodiment, instead of the weight 55, a spring 57 is provided inside the case 51 as an urging member. The spring 57 has, for example, an upper end connected to the bottom surface of the switch 54 and a lower end connected to the bottom surface of the case 57 .

When the trigger member 52 is not in contact with the switch 54 , the spring 57 holds the switch 54 at the bent end portion of the guide groove 56 while retaining a biasing force.

From this state, the trigger member 52 comes into contact with the switch 54 through the trigger cap 53, and pushes the weight 55 from the curved portion of the guide groove 56 toward the straight portion, as shown in FIG.

As a result, the switch 54 is lowered along the guide groove 56 by the biasing force of the spring 57 as shown in FIG. The screen 5 is pulled downward by an amount corresponding to the length indicated by the arrow, and accordingly the screen 5 automatically rises to the upper limit position.

<Other Modifications>
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.

In the above-described first and second embodiments, the engagement between the clutch member 14 and the screw shaft 11 is released by moving the moving member 13 on the screw shaft 11 by operating the chain 3. is not limited to that by the moving member 13 . For example, a switch is provided that electrically detects that the screw shaft 11 has rotated by the amount that the screen 5 has risen to the predetermined height H, and releases the engagement between the clutch member 14 and the screw shaft 11. good too.

In the first and second embodiments described above, the cylindrical body 12 has the convex portion 12a and the moving member 13 has the concave portion 13a, and both are engaged. may have a protrusion so that both may engage.

In the above-described first and second embodiments, the screw shaft 11 is provided as a support shaft, the moving member 13 is screwed onto the screw shaft 11, and the concave portion 13a (or the convex portion) provided on the outer peripheral surface of the moving member 13 ) engages with a convex portion 12a (or concave portion) provided on the inner peripheral surface of the cylindrical body 12 so that the two cannot rotate relative to each other. It was possible to move above 11. However, instead of this, the support shaft may be a non-threaded shaft, and may be engaged with the inner peripheral surface of the moving member 13 so as to be slidable in the axial direction by the uneven structure similar to that described above. The moving member 13 has a male screw on its outer peripheral surface, and the cylindrical body 12 has a female screw on its inner peripheral surface that engages with the male screw. The moving member 13 may be movable on the support shaft.

In the first and second embodiments described above, the cylindrical body 12 as the input member was connected to the pulley 4 via the connector 20 and the adapter 22, but the cylindrical body 12 and the adapter 22 need to be provided separately. Alternatively, the connector 20 may not be provided and the adapter 22 may be provided integrally with the cylindrical body 12 .

In the first and second embodiments described above, the screw shaft 11 is fixed to the side plate 16, but the screw shaft 11 can be rotated by a predetermined amount of torque, for example, by a screw or the like. may be adjustable.

In each of the above-described embodiments, examples using roll screens and honeycomb screens as shielding materials were shown. However, the shielding material is not limited to this. For example, particularly when a winding drum is used as a rotating body, other than the honeycomb screen of the second embodiment, other screens such as Venetian blinds, pleated screens, and Roman shades using metal, resin, or wooden slats may be used. The present invention is similarly applicable to the brands of Further, for example, the driving means 10 according to the third embodiment does not need to change the structure inside the set frame 1, which is a supporting member, from the conventional structure, and does not use the weight of the shielding material itself, so that it is possible to raise and lower a Venetian blind or the like. It can be easily applied to any type of shielding material, such as vertical blinds, shutters, accordion doors, sliding doors or panel doors that can be opened laterally. As the rotating body in this case, not only a winding pipe or a winding drum, but also a rotating member operated by an operating member such as a rotating shaft can be used according to the type of the shielding material.

When the laterally opening/closing type shielding member is used, the driving means has a biasing member that applies a biasing force in the opening or closing direction of the shielding member to the rotating body, and the biasing member is the shielding member. When the material is opened and closed to a predetermined position before the opening limit position or the closing limit position of the opening/closing operation, the shielding material is moved to the opening limit position or the closing limit position by the biasing force of the biasing member regardless of the operation of the operating member. It will be opened and closed to the closing limit position.

In the third embodiment described above, the case 51 is installed on the wall, but it may be installed so as to be suspended from the set frame 1 (head box 30). Since this eliminates the need for even installation on the wall, the present invention can be more easily applied to conventional blinds.

1 … Set frame (supporting member)
2... Winding pipe (rotating body)
3... Chain (operating member)
4 ... pulley (operating member)
5... Screen (shielding material)
6... Take-up spring (biasing member)
7 Weight bar 8 Auxiliary spring 9 Bracket 10 Driving means 11 Screw shaft (support shaft)
11a... Engaged portion 12... Cylindrical body (input member)
DESCRIPTION OF SYMBOLS 12a... Convex part 13... Moving member 13a... Concave part 14... Clutch member 15... Brake (reduction means)
DESCRIPTION OF SYMBOLS 16... Side plate 17... Fixed shaft 18... Wheel case 19... Clutch spring 20... Connector 21... Shaft 22... Adapter 25... Winding drum (rotating body)
26... Lifting cord 27... Interlocking gear 28... Shaft 29... Honeycomb screen (shielding material)
30... Head box (supporting member)
40 Bottom rail 51 Case 52 Trigger member 53 Trigger cap 53a Holder 54 Switch 55 Weight (biasing member)
56... Guide groove 57... Spring (biasing member)
DESCRIPTION OF SYMBOLS 61... Support pipe 62... Fixed end 100, 300... Roll screen 131... Pin 141... Engagement part 142... Clutch case 143... Protrusion 151... Brake main body 152... Brake case 200... Honeycomb screen H... Predetermined height

Claims (12)

a support member attached to the fixed surface;
a rotating body rotatably supported by the supporting member;
an operating member capable of rotationally driving the rotating body;
a shielding material that can be raised and lowered by rotating the rotating body by operating the operating member;
a driving means connected to the operating member for transmitting the driving force of the operating member to the rotating body;
The driving means has a biasing member that applies a biasing force to the rotating body in the upward direction of the shielding material,
The biasing member is actuated when the shielding material rises to a predetermined height that is before the upper limit position of the rising operation, and the shielding material is moved to the upper limit position by the biasing force of the biasing member regardless of the operation of the operating member. Shielding device to raise to position. A shielding device according to claim 1, comprising:
The drive means
a support shaft;
an input member to which the driving force is transmitted from the operating member;
a clutch member connected to the biasing member and engaged with the support shaft;
The biasing member is operated by disengaging the clutch member and the support shaft through the input member by operating the operating member. A shielding device according to claim 2, wherein
The clutch member is
an engaging portion engageable with the engaged portion formed on the support shaft;
a clutch case interlocked with the biasing member and supported on the support shaft;
The clutch case is
By engaging the engaging portion with the engaged portion, relative rotation with respect to the support shaft is made impossible,
A shielding device that is relatively rotatable with respect to the support shaft by disengaging the engaging portion from the engaged portion. A shielding device according to claim 2 or 3,
The driving means has a moving member movable along the support shaft,
The input member transmits a driving force for moving the moving member in the direction of the support shaft,
The biasing member is operated by operating the operation member so that the moving member moves along the support shaft via the input member, and the moving member switches the clutch member. A shielding device according to claim 4,
further comprising a pulley for transmitting the operation of the operating member to the input member;
the support shaft is a screw shaft;
the input member is a cylindrical body capable of accommodating the screw shaft and the moving member therein;
The cylindrical body has a projection or a recess that engages with the moving member, and when the cylindrical body rotates, the moving member engaged with the projection or the recess moves on the screw shaft. Device. A shielding device according to claim 4,
further comprising a pulley for transmitting the operation of the operating member to the input member;
the support shaft engages the moving member so that the moving member can slide in the direction of the supporting shaft;
The moving member has a male thread on its outer peripheral surface,
the input member is a cylindrical body capable of accommodating the support shaft and the moving member therein;
The cylindrical body has a female thread that engages with the male thread on its inner peripheral surface, and the engaged moving member moves on the support shaft as the cylindrical body rotates. A shielding device according to any one of claims 2 to 6,
The shielding device, wherein the driving means has a deceleration means connected to the biasing member and decelerating the rising speed of the shielding material due to the biasing force. A shielding device according to claim 7, comprising:
the deceleration means has a brake case connected to the biasing member and a brake main body housed in the brake case,
The clutch member is
an engaging portion engageable with the engaged portion formed on the support shaft;
a clutch case interlocked with the biasing member and supported on the support shaft, wherein the clutch case is
By engaging the engaging portion with the engaged portion, relative rotation with respect to the support shaft is made impossible,
By disengaging the engaging portion from the engaged portion, it is rotatable relative to the support shaft,
A shielding device engaged with the brake case so as to be relatively movable in the direction of the support shaft and to be integrally rotatable. A shielding device according to claim 1, comprising:
The operation member is an endless cord or chain having a trigger member in part,
The driving means has a case, the biasing member movable along the case, and a switch capable of activating the biasing member by contact with the trigger member,
At least part of the operation member is inserted through the case,
The biasing member transmits the driving force to the operation member when the trigger member and the switch contact each other. A shielding device according to any one of claims 1 to 9,
The rotating body is a winding pipe,
The shielding device, wherein the shielding material is lifted by being wound up by the rotation of the winding pipe. A shielding device according to any one of claims 1 to 9,
The rotating body is a winding drum,
The shielding device is lifted by winding an elevating cord, one end of which is connected to a portion of the shielding material, around the winding drum. a support member attached to the fixed surface;
a rotating body rotatably supported by the supporting member;
an operating member capable of rotationally driving the rotating body;
a shielding material that can be opened and closed by rotating the rotating body by operating the operating member;
a driving means connected to the operating member for transmitting the driving force of the operating member to the rotating body;
The driving means has a biasing member that applies a biasing force in a direction of opening or closing the shielding material to the rotating body,
The biasing member is actuated when the shielding member opens and closes to a predetermined position that is before the opening limit position or the closing limit position of the opening/closing operation, and the biasing force of the biasing member operates regardless of the operation of the operating member. A shielding device that opens and closes the shielding material to the open limit position or the closed limit position.

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