JP2021070950A - Shielding device - Google Patents

Abstract

To improve the operability of opening and closing a shielding material.SOLUTION: A shielding device has a support member attached to a fixed surface, a rotating body rotatably supported by the support member, an operating member capable of rotating the rotating body for driving the same, a shielding material that can be raised and lowered by rotation of the rotating body by operating the operating member, and drive means connected to the operating member and transmitting the driving force of the operating member to the rotating body. The drive means has an urging member that exerts a force on the rotating body in the upward direction of the shielding material. The urging member is activated when the shielding material rises to a predetermined height, which is before the upper limit position of the upward movement, and the force of the urging member raises the shielding material to the upper limit position not by the operation of the operating member.SELECTED DRAWING: Figure 8

Description

The present invention relates to a shielding device such as a roll screen.

Conventionally, in a shielding device such as a roll screen or a blind, the shielding material is raised and lowered by an operation code.

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

Further, in the technique of Patent Document 1, an end cap is fitted to one end of the take-up pipe, and a support shaft is fixed so as to pass through the end cap from the side plate, and the support shaft is fitted to the support shaft so as not to rotate relative to the support shaft. The wheel is rotatably supported on the fitted sleeve, the wheel is integrally formed with protrusions towards the end cap, and when the wheel rotates, the protrusions end via a clutch spring fitted onto the sleeve. The rotation is transmitted to the cap.

According to this, when one side of the operation cord is pulled, the screen is lowered by rotating the take-up pipe through the wheel in the screen rewinding direction, and when the operation cord is pulled on the other side, the winding pipe is wound through the wheel. By rotating the take-up pipe in the screen winding direction, the screen rises, and the rotation of the take-up pipe due to the weight of the screen is blocked by the engagement of the clutch spring, and the screen falls under its own weight. When the operation code is stopped from being pulled, the screen stops at the height at which the operation is stopped, so that the screen can be easily stopped at a desired ascending / descending 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 code, the operation code 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 above circumstances, an object of the present invention is to provide a shielding device capable of improving operability when opening and closing the shielding material.

In order to achieve the above object, the shielding device according to one embodiment of the present invention includes a support member attached to a fixed surface, a rotating body rotatably supported by the supporting member, and an operation capable of rotationally driving the rotating body. It has a member, a shielding material that can be raised and lowered 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 applies an ascending urging force of the shielding material to the rotating body. The urging member operates when the shielding material rises to a predetermined height in front of the upper limit position of the ascending operation, and the shielding material is raised to the upper limit by the urging force of the urging 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 rising position of the shielding material reaches a predetermined height in front of the upper limit position, the urging member is lifted without operating the operating member. The shielding material can be automatically raised to the upper limit position, improving operability. The urging 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 about 450 mm below the lower end of the support member, but is not limited to this.

Even if the driving means has a support shaft, an input member to which the driving force is transmitted from the operating member, and a clutch member that is connected to the urging member and engages with the support shaft. Good. In this case, the urging member may be operated by disengaging the clutch member and the support shaft via the input member by operating the operating member.

According to this configuration, the urging 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 includes an engaging portion that can be engaged with an engaged portion formed on the support shaft, and a clutch case that is interlocked with the urging member and is pivotally supported on the support shaft. You may. In this case, the clutch case is made unable to rotate relative to the support shaft by engaging the engaged portion with the engaged portion, and the engaged portion is disengaged from the engaged portion. Then, it may be made possible to rotate relative to the support shaft.

According to this configuration, by interlocking the urging member with the clutch case, when the clutch case is engaged, the urging force can be accumulated in the urging member, and the clutch case is disengaged. At that time, the urging force of the urging member can be released.

The driving means may have a moving member that can move along the support shaft. In this case, the input member may transmit a driving force for moving in the support axis direction to the moving member. In this case, the urging member may be operated by operating the operating member so that the moving member moves along the support shaft via the input member and the moving member switches the clutch member. ..

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

The cloaking device may further include a pulley that transmits the 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 inside. 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 engage the moving member with the moving member so as to be slidable in the support shaft direction. In this case, the moving member has a male screw on the outer peripheral surface, the cylindrical body has a female screw screwed with the male screw on the inner peripheral surface, and the cylinder body rotates to engage the cylinder body. The moving member may move on the support shaft.

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

The driving means may have a deceleration means connected to the urging member to reduce the ascending speed of the shielding material due to the urging force.

According to this configuration, the speed reduction means can automatically reduce the ascending speed of the urging member, and the safety and the sense of security are improved.

The deceleration means may include a brake case connected to the urging member and a brake body housed in the brake case. In this case, the clutch case may be engaged with the brake case so as to be relatively movable and integrally rotatable in the support axis direction.

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

The operating member may be an endless cord or chain having a trigger member in part. In this case, the driving means capable of transmitting the driving force to the operating member operates the urging member when the case, the urging member movable along the case, and the trigger member come into contact with each other. It may have a possible switch. Further, in this case, at least a part of the operating member is inserted through the case, and the urging 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, since the driving means is not built in the mechanical portion of the shielding device but is provided in the moving portion of the chain which is the operating member, the function of improving the operability can be added to the existing shielding device.

The rotating body may be a take-up pipe. In this case, the shielding material may be raised by being wound 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 on the winding pipe.

The rotating body may be a take-up drum. In this case, the shielding material may be raised by winding an elevating cord having one end 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 that raises the shielding material by winding the elevating cord around a drum.

The shielding device according to another embodiment 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. It has a shielding material that can be opened and closed by the rotation of the rotating body by the operation of the above, 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 applies an urging force in the opening or closing direction of the shielding material to the rotating body. The urging member operates when the shielding material opens and closes to a predetermined position which is before the opening limit position or the closing limit position of the opening / closing operation, and the urging force of the urging member is used regardless of the operation of the operating member. The shielding material is opened and closed to the opening limit position or the closing limit position.

According to this configuration, the shielding material is opened or closed by continuous operation of the operating member, and when the position of the shielding material reaches a predetermined position before the opening limit position or the closing limit position, the operating member is not operated. However, the urging member can automatically open or close the shielding material to the limit position, which improves operability.

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

It is a partially transparent front view of the roll screen which concerns on one Embodiment of this invention. It is a front side sectional view in the winding pipe which the roll screen of FIG. 1 has. 2A is a cross-sectional view taken along the line AA, a cross-sectional view taken along the line BB, a cross-sectional view taken along the line CC, a cross-sectional view taken along the line DD, and a sectional view taken along the line EE. It is an exploded perspective view of the drive means which the 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. It is a perspective view of the main part of the roll screen including the said drive means. It is a front side sectional view which showed the operation of the said drive means. It is a figure which showed the operation of the clutch member of the drive means at the time of the raising operation of the roll screen. It is a figure which showed the operation of the clutch member of the drive means at the time of the lowering operation of the roll screen. It is a partially transparent front view of the honeycomb screen which concerns on 2nd Embodiment of this invention. It is a partially transparent front view and side view of the roll screen which concerns on 3rd Embodiment of this invention. It is a figure which showed the operation of the drive means of the roll screen which concerns on 3rd Embodiment of this invention. It is a figure which showed the operation 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, the first embodiment of the present invention will be described.

[Roll screen configuration]
FIG. 1 is a partially transparent front view of the roll screen according to the present 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 take-up pipe 2 as a rotating body supported by the set frame 1, a chain 3 as an operating member, and the like. It has a pulley 4, a screen 5 as a shielding material, and a driving means 10 for driving a rotating body.

The set frame 1 has a horizontally long rectangular parallelepiped shape, and is attached to a ceiling, a wall, or the like via a bracket 9 by screwing or the like 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 take-up pipe 2 is rotatably supported by the side plates 16.

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

At one end of the take-up pipe 2, the chain 3 and the pulley 4 for rotationally driving the take-up pipe 2 are provided. The chain 3 is formed in an annular shape (endless shape) and is wound around the outer circumference of the pulley 4, and the pulley 4 is assembled to the side plate 16. The screen 2 can be raised and lowered in the Y direction in the figure by rotating the take-up pipe 2 by operating the chain 3.

The drive means 10 is connected to the chain 3 and the pulley 4, and transmits these rotational driving forces to the take-up pipe 2. The drive means 10 has a take-up spring 6 as an urging member that applies an ascending urging force (winding force) of the screen 2 to the take-up pipe 2.

Although the details will be described later, the take-up spring 6 operates when the screen 2 rises to a predetermined height in front of the upper limit position of the ascending operation (the position where the weight bar 7 comes into contact with the set frame 1), and the winding spring 6 operates in the chain 3. The screen 5 can be automatically raised to the upper limit position by the urging force of the take-up spring regardless of the operation.

At the other end of the take-up pipe 2, an auxiliary spring 8 is provided to reduce 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 sectional view of the winding pipe of the roll screen. Further, FIG. 3 is a sectional view taken along the line AA (FIG. A), a sectional view taken along the line BB (FIG. B), a sectional view taken along the line CC (FIG. C), and a sectional view taken along the line DD (FIG. D). ) And EE cross-sectional view (FIG. E), respectively. 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. Further, FIG. 7 is a perspective view of a main portion in the take-up pipe 2 of the roll screen 100 including the driving means 10.

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

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 on the surface which is screwed with the inner peripheral surface of the moving member 13. As the cylindrical body 12 rotates, the moving member 13 engaged by the convex portion 12a and the concave portion 13a moves on the screw shaft 11. Since the moving member 13 moves as the screen 2 rises and falls, the screw shaft 11 also functions as a means for detecting the ascending and lowering positions of the screen 2.

The pulley 4 is rotatably supported by the fixed shaft 17, and a part of the pulley 4 is housed in the wheel case 18. A clutch spring 19 is provided between the fixed shaft 17 and the wheel case 18. The clutch spring 19 prevents the take-up pipe 2 from rotating due to the weight of the screen 5 (weight bar 7) due to its urging force and unwinding the screen 2. An adapter 22 that fits into the end of the take-up pipe 2 is connected around the wheel case 18.

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

The rotation from the pulley 4 loosens the clutch spring 19 and is transmitted to the take-up pipe 2 via the wheel case 18 and the adapter 22. On the other hand, the rotation from the take-up pipe 2 restricts the rotation of the take-up pipe 2 by winding the clutch spring 19 via the adapter 22 and the wheel case 18.

Further, the driving means 10 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 transmitting the urging 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 concave engaged portion 11a at a position opposite to the pulley 4. The clutch member 14 has an engaging portion 141 that can be engaged with the engaged portion 11a, and a clutch case 142 that is interlocked with the take-up spring 6 and is pivotally supported on the screw shaft 11.

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

The clutch case 142 cannot rotate relative to the screw shaft 11 by engaging the engaging portion 141 with the engaged portion 11a. Further, in the clutch case 142, the moving member 13 that moves along the screw shaft 11 engages with the engaging portion 141, so that the engaging portion 141 is disengaged from the engaged portion 11a, so that the clutch case 142 becomes a screw shaft 11. On the other hand, it is said that it can rotate relative to each other.

Further, as shown in FIGS. 2 to 4, the tip of the moving member 13 in the X direction protrudes in the X direction and has a concave portion of the engaging portion 141 of the clutch member 14 on the opposite side of the convex portion of the rotating end. A pin 131 that engages with the pin 131 is integrally provided.

Then, in the take-up spring 6, the moving member 13 moves along the screw shaft 11 via the cylindrical body 12 by the operation of the chain 3, and the pin 131 of the moving member 13 is the engaging portion 141 of the clutch member 14. It operates by disengaging the screw shaft 11 from the engaged portion 11a. In other words, the engagement portion 141 engages with the engaged portion 11a of the screw shaft 11 to regulate the release of the take-up spring 6.

In this way, the moving member 13 that moves along the screw shaft 11 switches the clutch member 14 with the operation of the chain 3, so that the "predetermined height" at which the take-up spring 6 operates can be made constant. it can.

Further, as described above, the structure is such that the rotation is transmitted to the cylindrical body 12 via the pulley 4 with the operation of the chain 3, and the driving force is not directly transmitted from the take-up pipe 2 to the cylindrical body 12. As a result, the urging force of the take-up spring 6 can be transmitted to the take-up pipe 2 without being affected by the weight of the screen 5.

The drive means 10 is further connected to the take-up spring 6 and has a brake 15 as a deceleration means for applying a braking force to the take-up spring 6 and decelerating the ascending speed of the screen 5 due to the urging force. The brake 15 also has a function of keeping the speed of automatic winding of the screen 5 by the take-up spring 6 constant.

The brake 15 has a brake main body 151 and a brake case 152 accommodating the brake main 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 and integrally rotatable in the screw shaft 11 direction (X direction).

By having such a structure of the brake 15, 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, and improve the safety and security when the screen 5 is automatically raised. At the same time, the brake body 151 can be accommodated compactly.

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

[Roll screen operation]
Next, the operation of the roll screen 100 configured as described above will be described. FIG. 8 is a front side (Z direction) cross-sectional view 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 drive means 10 during the ascending operation, and FIG. 10 is a cross-sectional view of the drive means 10 during the lowering operation of the roll screen 100. It is a side surface side (X direction) sectional view and external view which showed the operation of a member 14. FIG. 9 and 10, each of FIGS. A1 to D1 shows a cross section of the cylindrical body 12, and each of FIGS. A2 to D2 shows the appearance of the chain 3 and the screen 5.

First, the ascending operation of the roll screen 100 will be described.

As shown in FIGS. 8A and 9A, first, while the user is raising the screen 5 by operating the chain 3 (black arrow in FIG. 9), the rotation of the pulley 4 causes the wheel while loosening the clutch spring 19. It is transmitted to the connector 20 via the case 18. The rotation from the connector 20 (solid arrow in the rotation direction in FIG. 8) is input to the cylindrical body 12, and the moving member 13 rotates as the cylindrical body 12 rotates (broken arrow in the rotation direction in FIG. 8). 8 Move to the left (left arrow in FIG. 8). Along with this ascending 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 screen 5 is raised to a predetermined height H, which is before the upper limit position which is the limit position of the ascending operation, by the operation of the chain 3 (white in FIG. 9). (Arrow), the pin 131 of the moving member 13 comes into contact with the engaging portion 141 of the clutch member 14.

Subsequently, as shown in FIG. 9B', the rotation of the pin 131 pulls up the rotating end of the engaging portion 141 to the pin 131, disengages the screw shaft 11 from the engaged portion 11a, and disengages the clutch. The case 142 is released from being fixed. As a result, the 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 the operation of the chain 3, the urging force of the take-up spring 6 causes the clutch case 142 to move the cylindrical body 12, the connector 20, the wheel case 18, and the adapter 22 from the clutch case 142. When the rotation is transmitted to the take-up pipe 2 via the screen 5, the screen 5 starts to automatically rise from the predetermined height H.

Here, the difference (the length that automatically rises) between the upper limit position and the predetermined height H is, for example, 450 mm, which corresponds to about 3 rotations of the take-up pipe 2. With this length, the user can automatically feel that the screen 5 is raised without depending on his / her own operation. However, the length is not limited to this.

Then, as shown in FIGS. 8D and 9D, the rotation of the clutch case 142 is transmitted to the brake case 152, so that the screen 5 is wound up regardless of the operation of the chain 3 while the braking force is applied by the brake 15. The take-up pipe 2 is rotated by the urging force of the spring 6 and automatically rises 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. Further, the user feels that the operation becomes heavy due to the rotational resistance of the brake and the chain 3 and the screen 5 are pulled in.

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 in a state where the urging force is completely released, and the urging force remains. A force that tends to rotate counterclockwise in the drawing acts on the engaging portion 141, and the pin 131 stops in a state where the clockwise rotation is restricted by the engaging portion 141.

Next, the lowering operation of the roll screen 100 will be described.

First, as shown in FIG. 10A, when the user operates the chain 3 in the downward direction (black arrow in the figure) from the state where the screen 5 is stopped at the upper limit position and the screen 5 starts to descend (white arrow in the figure). ), As shown in FIG. 10B, the pin 131 of the moving member 13 rotates clockwise together with the clutch member 14. At this time, the urging force is stored in the take-up spring 6 by 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.

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

Then, when the user continues the lowering operation of the chain 3, as shown in FIG. 10D, the engagement between the clutch member 14 and the moving member 13 is released, the rotation of the clutch member 14 is restricted, and only the moving member 13 is released. It will rotate. As a result, the screen 5 is lowered according to the amount of operation, and the release of the screen 5 is restricted while the urging force is stored in the take-up spring 6.

[Summary]
As described above, according to the present embodiment, the user raises the screen 5 by continuously operating the chain 3, and the raised position of the screen 5 is a predetermined height H (immediately before the end of winding) before the upper limit position. When it reaches the limit, the take-up 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, the second embodiment of the present invention will be described. In this embodiment and subsequent embodiments, the same reference numerals are given to the parts having the same functions as those in the first embodiment.

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

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

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

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

Further, the screen 29 in the present embodiment is a honeycomb screen formed by connecting a plurality of tubular cells having a hexagonal cross section in the Y direction of the figure so as to be convolutable and expandable. The fabric 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.

An elevating cord 26 insertion hole (not shown) is formed inside the screen 29, and the elevating cord 26 hanging from the set frame 1 is inserted into the elevating cord insertion hole. The upper end of the elevating cord 26 is connected to the take-up drum 25 so as to be rewound and unwound in the head box 30, and the other end of the elevating cord 26 is connected to the bottom rail 40.

When the user operates the chain 3, the elevating cord 26 moves up and down, and the bottom rail 40 moves up and down, so that the screen 29 can be expanded and contracted. In the present embodiment, the same driving means 10 as described above is used for automatic winding of the elevating cord 26 to the winding drum 25.

Further, in the present embodiment, for example, the interlocking gear 27 can be integrally rotated coaxially with the winding drum 25 which is a rotating body between the winding drum 25 and the pulley 4 which are closest to the pulley 4 among the plurality of winding drums 25. Is provided. The rotation of the interlocking gear 27 is transmitted to another take-up drum 25 via the shaft 28, so that the rotations of the plurality of take-up drums 25 are synchronized.

In the present 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 elevating cord 26 in the winding direction, the shaft 28 and the winding drum 25 rotate integrally. Then, the take-up drum 25 winds up the elevating cord 26, the bottom rail 30 rises, and the screen 29 is sequentially folded from the lowermost cell to the uppermost cell.

Then, when the bottom rail 30 rises to a predetermined height H, which is in front of the upper limit position which is the limit position of the ascending operation, by further operation of the chain 3 by the user, the driving means 10 as in the first embodiment. The take-up spring 6 is activated by this, and the elevating cord 26 is automatically taken up by the take-up drum 25 up to the upper limit position.

In this way, even when the take-up drum 25 is adopted as the rotating body, the lifting cord 26 can be automatically taken up (automatically ascending the screen 29) from the predetermined height H by the operation of the take-up spring 6 by the driving means 10. It becomes.

<Third Embodiment>
Next, a third embodiment of the present 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 drive means of the roll screen according to the present embodiment. ..

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

That is, as shown in FIG. 12, the drive means 10 in the present embodiment includes a vertically long rectangular parallelepiped case 51 through which the chain 3 is inserted and attached to a fixed surface such as a wall, and a part of the chain 3, for example. It has a cylindrical trigger member 52.

Further, as shown in FIG. 13, the driving means 10 has a weight 55 as an urging member that can move along the case 51 and a switch 54 that can operate the weight 55 when the trigger member 52 comes into contact with the weight 55. Have.

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

The switch 54 has, for example, an obtuse-angled plate-like or rod-like shape. The weight 55 is provided on the bottom surface of the switch 54.

Further, in the case 51, for example, guide grooves 56 formed in two rows substantially parallel to each other are provided. The switch 54 is engaged so as to be guided by both guide grooves 56, for example, via two shaft portions provided so as to project in the X direction of FIG. The guide groove 56 has a bent upper end portion and a linear shape at other portions.

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

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

From this state, when the user further operates the chain 3, the trigger member 52 rises, and as shown in FIG. B, when the screen 5 reaches a predetermined height in front of the upper limit height, the trigger member 52 rises. It comes into contact with the trigger cap 53, and the trigger cap 53 leaves the holder 53a and rises together with the trigger member 52.

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

As a result, as shown in FIG. D, the weight 55 drops by its own weight along the guide groove 56, and the urging force of the weight 55 causes the end of the switch 54 to be opposite to the contact end with the trigger member 52. By transmitting the driving force to the chain 3 that engages with, the chain 3 is pulled downward by the 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. To do.

As described above, according to the present embodiment, since the drive means 10 is not built in the mechanical portion in the set frame 1 of the roll screen 300 but is provided in the moving portion of the chain 3, 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 the modified example of the roll screen 300 according to the third embodiment.

As shown in the figure, in the present embodiment, a spring 57 is provided in the case 51 instead of the weight 55 as the urging member. For example, the upper end of the spring 57 is connected to the bottom surface of the switch 54, and the lower end of the spring 57 is 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 locks the switch 54 to the bent end portion of the guide groove 56 while accumulating the urging force.

From that state, as shown in FIG. A, the trigger member 52 comes into contact with the switch 54 via the trigger cap 53, and the weight 55 is pushed out from the bent portion of the guide groove 56 toward the straight portion.

As a result, as shown in FIG. B, the switch 54 is lowered along the guide groove 56 by the urging force of the spring 57, and the driving force is transmitted to the engaging chain 3, so that the chain 3 is outlined in the figure. It is pulled downward by the amount corresponding to the length indicated by the arrow, and the screen 5 automatically rises to the upper limit position accordingly.

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

In the first and second embodiments described above, the moving member 13 moves on the screw shaft 11 by the operation of the chain 3 to release the engagement between the clutch member 14 and the screw shaft 11. The release of 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 rises to the predetermined height H and disengages the clutch member 14 from the screw shaft 11. May be good.

In the first and second embodiments described above, the cylindrical body 12 has a convex portion 12a and the moving member 13 has a concave portion 13a and both are engaged with each other, but the cylindrical body 12 has a concave portion and the moving member 13 May have a convex portion and engage with each other.

In the first and second embodiments described above, a screw shaft 11 is provided as a support shaft, a moving member 13 is screwed onto the screw shaft 11, and a concave portion 13a (or a convex portion) provided on the outer peripheral surface of the moving member 13 is provided. ) Engage with the convex portion 12a (or the 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 on 11. However, instead of this, the support shaft may be a shaft having no thread cutting, and may engage with the inner peripheral surface of the moving member 13 so as to be slidable in the axial direction by the same uneven structure as described above. The moving member 13 has a male screw on the outer peripheral surface, the cylindrical body 12 has a female screw on the inner peripheral surface that engages with the male screw, and the cylindrical body 12 rotates to engage 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 an input member is 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. 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 and moved by a predetermined torque, for example, by a screw or the like, and the take-up spring 6 is provided by that torque. It may be possible to adjust the operating length of the.

In each of the above-described embodiments, an example in which a roll screen and a honeycomb screen are used as the shielding material is shown. However, the shielding material is not limited to this. For example, when a take-up drum is used as a rotating body, in addition to the honeycomb screen of the second embodiment, there are other Venetian blinds, pleated screens, roman shades, etc. using metal / resin or wooden slats. The present invention is similarly applicable to the brand of. Further, for example, the drive means 10 according to the third embodiment does not need to change the structure in the set frame 1 which is a support member from the conventional one, and does not utilize the weight of the shielding material itself. It can be easily applied not only to the type of shielding material but also to any shielding material such as a vertical blind, a shutter, an accordion door, a sliding door, a panel door and the like which can be opened and closed in the lateral direction. 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 depending on the type of the shielding material can be used.

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

In the third embodiment described above, the case 51 is installed on the wall, but it may be provided so as to be suspended from the set frame 1 (head box 30). This eliminates the need for even wall installation, making it easier to apply the invention to conventional blinds.

1 ... Set frame (support member)
2 ... Winding pipe (rotating body)
3 ... Chain (operation member)
4 ... Pulley (operating member)
5 ... Screen (shielding material)
6 ... Winding spring (urging member)
7 ... Weight bar 8 ... Auxiliary spring 9 ... Bracket 10 ... Drive means 11 ... Screw shaft (support shaft)
11a ... Engaged portion 12 ... Cylindrical body (input member)
12a ... Convex part 13 ... Moving member 13a ... Concave part 14 ... Clutch member 15 ... Brake (deceleration means)
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 (support 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)
61 ... Support pipe 62 ... Fixed end 100, 300 ... Roll screen 131 ... Pin 141 ... Engagement part 142 ... Clutch case 143 ... Protrusion 151 ... Brake body 152 ... Brake case 200 ... Honeycomb screen H ... Predetermined height

Claims (12)

Support members attached to the fixed surface and
A rotating body rotatably supported by the support member and
An operating member capable of rotationally driving the rotating body and
A shielding material that can be raised and lowered by the rotation of the rotating body by operating the operating member, and
It is provided with a driving means connected to the operating member and transmitting the driving force of the operating member to the rotating body.
The driving means has an urging member that applies an ascending urging force of the shielding material to the rotating body.
The urging member operates when the shielding material rises to a predetermined height in front of the upper limit position of the ascending operation, and the shielding material is raised by the urging force of the urging member regardless of the operation of the operating member. A shielding device that raises to a position. The shielding device according to claim 1.
The driving means is
Support shaft and
An input member to which the driving force is transmitted from the operating member and
It has a clutch member that is connected to the urging member and engages with the support shaft.
The urging member is a shielding device that operates by disengaging the clutch member and the support shaft via the input member by operating the operating member. The shielding device according to claim 2.
The clutch member is
An engaging portion that can be engaged with the engaged portion formed on the support shaft,
It has a clutch case that works with the urging member and is pivotally supported on the support shaft.
The clutch case is
By engaging the engaged portion with the engaged portion, it is made impossible to rotate relative to the support shaft.
A shielding device that can rotate relative to the support shaft by disengaging the engaging portion from the engaged portion. The shielding device according to claim 2 or 3.
The driving means has a moving member that can move along the support shaft.
The input member transmits a driving force for moving in the support axis direction to the moving member.
The urging member is a shielding device that operates when the moving member moves along the support shaft via the input member by operating the operating member and the moving member switches the clutch member. The shielding device according to claim 4.
A pulley for transmitting the operation of the operating member to the input member is further provided.
The support shaft is a screw shaft and
The input member is a cylindrical body capable of accommodating the screw shaft and the moving member inside.
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. apparatus. The shielding device according to claim 4.
A pulley for transmitting the operation of the operating member to the input member is further provided.
The support shaft engages the moving member so as to be slidable in the direction of the support shaft, and the support shaft engages with the moving member.
The moving member has a male screw on the outer peripheral surface and has a male screw.
The cylindrical body has a female screw screwed with the male screw on the inner peripheral surface, and when the cylindrical body rotates, the engaged moving member moves on the support shaft. The shielding device according to any one of claims 2 to 6.
The driving means is a shielding device which is connected to the urging member and has a deceleration means for decelerating the ascending speed of the shielding material due to the urging force. The shielding device according to claim 7.
The deceleration means includes a brake case connected to the urging member and a brake body housed in the brake case.
The clutch case is a shielding device that is engaged with the brake case so as to be relatively movable and integrally rotatable in the support axis direction. The shielding device according to claim 1.
The operating member is an endless cord or chain having a trigger member in part.
The driving means capable of transmitting the driving force to the operating member is a switch capable of operating the urging member when the case, the urging member movable along the case, and the trigger member come into contact with each other. And have
At least a part of the operating member inserts the case.
The urging member is a shielding device that transmits the driving force to the operating member when the trigger member and the switch come into contact with each other. The shielding device according to any one of claims 1 to 9.
The rotating body is a take-up pipe.
The shielding material is a shielding device that rises by being wound by the rotation of the winding pipe. The shielding device according to any one of claims 1 to 9.
The rotating body is a take-up drum.
The shielding material is a shielding device that rises when an elevating cord having one end connected to a part of the shielding material is wound around the winding drum. Support members attached to the fixed surface and
A rotating body rotatably supported by the support member and
An operating member capable of rotationally driving the rotating body and
A shielding material that can be opened and closed by rotating the rotating body by operating the operating member, and
It is provided with a driving means connected to the operating member and transmitting the driving force of the operating member to the rotating body.
The driving means has an urging member that applies an urging force in the opening or closing direction of the shielding material to the rotating body.
The urging member operates when the shielding material opens and closes to a predetermined position which is before the opening limit position or the closing limit position of the opening / closing operation, and the urging force of the urging member is used regardless of the operation of the operating member. A shielding device that opens and closes the shielding material to the opening limit position or the closing limit position.

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