JP2009229915A - Screen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a screen for improving flatness of a screen body. <P>SOLUTION: The screen 1 includes the screen body 2, a rewinding shaft 3, a holding member 4, a plurality of tubular members 5, two wires 6, a pantograph mechanism 7, and a body tension applying mechanism 8. The screen body 2 includes two crossing sides A respectively crossing with two sides held by the rewinding shaft 3 and the holding members 4, and has a shape of rotational symmetry in a thread winding shaft shape. The tubular members 5 are arranged along the respective crossing sides A, and are formed in a tubular shape passing through along an extending direction of the respective crossing sides A. The wires 6 are supported at both ends so as to locate on an outer side of the respective crossing sides A, and are inserted in the respective tubular members 5. The pantograph mechanism 7 applies tension on the wires 6 along the extending direction of the respective crossing sides A. The body tension applying mechanism 8 applies the tension along the extending direction of the respective crossing sides A to the screen body 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a screen.

Conventionally, a substantially rectangular screen main body having flexibility, one side of the screen main body, a winding shaft for winding the screen main body, and a holding for holding a side opposite to the side held by the winding shaft A screen including a member is known (see, for example, Patent Document 1).
In the screen described in Patent Document 1, a screen main body, a winding pipe (winding shaft) to which one end of the screen main body is connected, a support frame that rotatably supports the winding pipe, and the other end of the screen main body are provided. An extended rail (holding member) to be connected, and a link mechanism that closely separates the extended rail and the support frame are provided.
The screen body is pulled out from the winding shaft by separating the overhang rail and the support frame by the link mechanism, and is wound around the winding shaft by being brought close to the screen body.

JP-A-6-235773

  Moreover, in the screen of patent document 1, it applies along the direction which winds a screen main body around a screen main body with respect to a screen main body by applying tension | tensile_strength with a link mechanism between a support frame and an overhanging rail. Applying tension. However, since the two intersecting sides that intersect with the two sides held by the winding pipe and the extending rail are not held, along the direction intersecting the direction in which the screen body is wound around the winding pipe. There is a problem that tension cannot be applied to the screen body, curling wrinkles occur at the intersections, or wrinkles are formed on the screen body, resulting in a decrease in the flatness of the screen body.

  The objective of this invention is providing the screen which can improve the flatness of a screen main body.

  The screen of the present invention includes a flexible substantially rectangular screen main body, one side of the screen main body, a winding shaft for winding the screen main body, and a side held by the winding shaft. A holding member that holds opposite sides, the winding shaft, and two intersecting sides that intersect the two sides held by the holding member, respectively, the winding shaft side, and the With respect to the width between the intersecting sides on at least one of the holding member side, the shape is curved so that the width between the intersecting sides in the central portion is small, provided on each intersecting side, A tubular member formed in a tubular shape penetrating along the extending direction of each intersecting side, and two string-like shapes that are supported at both ends so as to be located outside each intersecting side and are inserted through the tubular member Parts and A tension applying mechanism for the main body that applies tension to the screen along the extending direction of the intersecting sides, and a string that applies tension to the string-like member along the extending direction of the intersecting sides. And a tension applying mechanism for the shaped member.

According to such a configuration, each intersecting side in the screen main body has a curved shape, and the screen includes a tubular member, a string-like member, and a string-like member tension applying mechanism. The string-like member is supported at both ends so as to be located outside each crossing side, and is inserted through the tubular member. As a result, by applying tension to the string-like member by the string-like member tension applying mechanism, the tubular member provided at each crossing side intersects the outer peripheral direction of the screen body, that is, the direction in which the screen body is wound up. Tension is applied along the direction (hereinafter referred to as the crossing direction). Accordingly, tension is applied to the screen body along the intersecting direction via the tubular member, so that no curl is generated on the intersecting side and no wrinkle is formed on the screen body, thereby improving the flatness of the screen body. Can do.
The tubular member may be provided directly on the screen body, or may be provided separately from the screen body. Moreover, the length of the tubular member may be, for example, the same length as each crossing side or may be shorter than each crossing side. Furthermore, when the length of the tubular member is shorter than each crossing side, a plurality of tubular members may be provided.

Further, if the mechanism for applying tension to the string-like member and the mechanism for applying tension to the screen main body are the same mechanism, for example, even when the tension is sufficiently applied to the screen main body, There is a problem that there is a case where the tension is not sufficiently applied to the string-like member so that the string member is loosened, and the flatness of the screen body cannot be sufficiently improved.
According to the present invention, the string-like member tension applying mechanism for applying tension to the string-like member and the main body tension applying mechanism for applying tension to the screen main body are independent from each other. In addition, it is possible to reliably apply a tension to the screen body, and to further improve the flatness of the screen body.

  In the present invention, the take-up shaft is formed in a cylindrical shape, has the same rotation shaft as the take-up shaft, and has a configuration in which a central shaft that rotates as the take-up shaft rotates is inserted. The string-like member tension applying mechanism is configured by a pantograph mechanism that closely separates the winding shaft and the holding member, and the main body tension applying mechanism is the string-like member tension adding mechanism. By separating the winding shaft and the holding member, the winding shaft includes a biasing member that biases the central shaft in a direction in which the screen main body is wound. It is preferable that the center shaft is slidably supported and the other end is supported by the holding member.

According to such a configuration, the tension applying mechanism for the string-like member is configured by a pantograph mechanism that closely separates the winding shaft and the holding member, and one end of the string-like member is slidable on the central axis. The other end is supported by the holding member. Therefore, the tension applying mechanism for the string-like member can apply tension to the string-like member by isolating the winding shaft and the holding member.
The tension applying mechanism for the main body includes a biasing member that biases the central axis in the direction in which the screen main body is wound up by separating the winding shaft and the holding member by the tension applying mechanism for the string-like member. I have. Accordingly, the tension applying mechanism for the main body applies tension to the screen main body via the central shaft and the winding shaft in a state where the winding shaft and the holding member are isolated by the tension applying mechanism for the string-like member. Can do.

Here, since the string-like member is slidably supported by the central axis that rotates in accordance with the rotation of the winding shaft, even if the central axis is urged by the urging member, the central axis Against the influence of the urging force. That is, the string-like member tension applying mechanism and the main body tension applying mechanism are configured independently of each other. Therefore, tension can be reliably applied to the string-like member and the screen body with a simple configuration, and the flatness of the screen body can be further improved.
The urging member urges the central axis in the direction in which the screen main body is wound up by separating the winding shaft and the holding member by the tension applying mechanism for the string-shaped member. By bringing the winding shaft and the holding member close to each other by the tension applying mechanism, the screen body can be automatically wound around the winding shaft.

  In the present invention, the winding shaft is formed with a notch along the rotation direction of the winding shaft, and the string-like member is supported by the central shaft via the notch. preferable.

According to such a configuration, the string-like member is supported on the central axis via the notch formed along the rotation direction of the take-up shaft, so that the string-like member tension applying mechanism takes up the string-like member. By bringing the shaft and the holding member close to each other, the screen body can be automatically wound around the winding shaft, and at the same time, the string-like member can be wound around the winding shaft. Therefore, the storage property of the screen can be improved.
Moreover, since the string-like member can move along the notch even when the central axis is urged by the urging member, it is not affected by the urging force. Therefore, it is possible to maintain a configuration in which the string member tension applying mechanism and the main body tension applying mechanism are made independent, and the flatness of the screen main body can be further improved.

  In the present invention, each of the intersecting sides is curved such that the width between the intersecting sides in the central portion is smaller than the width between the intersecting sides on the winding shaft side and the holding member side. It is preferable that the screen body has a rotationally symmetric shape.

  According to such a configuration, the tension is applied to the string-like member by the string-like member tension applying mechanism, so that the tension is applied radially from the center to the outer periphery via the respective tubular members. Can do. Therefore, for example, the flatness of the screen body can be further improved as compared with a case where the screen body is trapezoidal.

  In the present invention, it is preferable that a plurality of the tubular members are provided along the intersecting sides.

Here, as described above, when the length of the tubular member is the same as each crossing side, the string member is tensioned by the string member tension applying mechanism, and the tubular member is wrinkled. As a result, there is a problem that wrinkles may occur in the screen body. Further, assuming that the length of the tubular member is shorter than each crossing side and only one tubular member is provided on each crossing side, tension is applied to the string-like member by the string-like member tension applying mechanism. Thus, there is a problem that wrinkles may occur in the screen body because tension is applied to only one place.
According to the present invention, since the plurality of tubular members are provided along each intersecting side, tension can be applied to the screen body at a plurality of portions along the intersecting direction. Therefore, wrinkles are less likely to occur in the screen body, and the flatness of the screen body can be improved.

In this invention, it is preferable that the said tubular member is provided with the contact part contact | abutted to the said string-like member, and the said contact part consists of metal materials.
According to such a configuration, in the tubular member, the abutting portion that abuts on the string-like member is made of the metal material, so that wear of the tubular member can be suppressed. Accordingly, the life of the screen can be extended.

  In this invention, it is preferable to provide the support mechanism which supports the said holding member, and the said support mechanism supports the said holding member in at least two places.

Here, if the holding member is supported at only one place, twisting occurs between the winding shaft and the holding member, and there is a problem that the flatness of the screen body is lowered.
According to the present invention, since the support mechanism supports the holding member at at least two locations, it is difficult for twisting to occur between the winding shaft and the holding member, and the flatness of the screen body can be improved.

[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
[Schematic configuration of screen]
FIG. 1 is a schematic view of the screen 1 according to the first embodiment of the present invention as viewed from the back side.
As shown in FIG. 1, the screen 1 has a screen body 2, a winding shaft 3, a holding member 4, a tubular member 5, a winding shaft 3, and a wire 6 that is supported at both ends by the holding member 4. And a pantograph mechanism 7, a main body tension applying mechanism 8, and a screen cover 9 that houses the winding shaft 3. In FIG. 1, the screen cover 9 is seen through.

  The screen body 2 is a flexible, substantially rectangular reflective screen, for example, image light projected from a projector or the like is reflected by a reflective surface formed on the back side (front side) in FIG. By doing so, an image is displayed. The screen main body 2 has one side (lower end in FIG. 1) held by the winding shaft 3 and the side (upper end in FIG. 1) opposite to the side held by the winding shaft 3. It is held by the holding member 4. Further, the screen body 2 has two intersecting sides A (both ends on the left and right sides in FIG. 1) intersecting with the winding shaft 3 and the two sides held by the holding member 4, respectively. Is curved so that the width between the crossing sides A in the center portion is smaller than the width between the crossing sides A on the winding shaft 3 side and the holding member 4 side. More specifically, the screen body 2 has a pincushion-shaped rotational symmetry.

FIG. 2 is a schematic diagram showing an end portion of the winding shaft 3.
As shown in FIGS. 1 and 2, the take-up shaft 3 is a shaft for taking up the cylindrical screen body 2, and a bearing portion 3 </ b> A (not shown in FIG. 2) provided on the screen cover 9. Is rotatably supported by the shaft. A center shaft 31 that has the same rotation axis as the winding shaft 3 and rotates with the rotation of the winding shaft 3 is inserted into the winding shaft 3. Further, as shown in FIG. 2, the take-up shaft 3 has a notch 32 that is notched along the rotation direction of the take-up shaft 3 after being cut out in the length direction of the take-up shaft 3. Is formed.
The wire 6 as a string-like member has an annular portion 61 at one end (the lower end in FIG. 1). The wire 6 is slidably supported by the annular portion 61 being inserted into the central shaft 31 through the notch 32 of the winding shaft 3.

FIG. 3 is a schematic diagram showing a portion of the holding member 4 that supports the wire 6.
As shown in FIGS. 1 and 3, the holding member 4 is provided with two wire fixing portions 41 on both sides for fixing the other end portion (the upper end portion in FIG. 1) of the wire 6.
As shown in FIG. 3, each wire fixing portion 41 includes a female screw portion 411 provided in the holding member 4 and a screw 412 inserted through the female screw portion 411. The other end of the wire 6 is fixed to the tip of the screw 412. That is, each wire fixing portion 41 is configured to be able to adjust the position of the other end portion of the wire 6 by rotating the screw 412.
Here, the positions of the notch portion 32 of the winding shaft 3 and the wire fixing portions 41 of the holding member 4 are positioned outside the intersecting side A of the screen body 2 as shown in FIGS. is doing. Then, both ends of the wire 6 are supported by the winding shaft 3 and the holding member 4 so as to be positioned outside the respective intersecting sides A.

FIG. 4 is an enlarged schematic view of the vicinity of the tubular member 5.
As shown in FIG. 1 and FIG. 4, the tubular member 5 is a member that is provided in a plurality along each crossing side A and is formed in a tubular shape that penetrates along the extending direction of each crossing side A. Specifically, as shown in FIG. 4, the tubular member 5 has a configuration in which two trapezoidal members 51 having a substantially trapezoidal shape having flexibility are bonded to each other so as to sandwich the screen body 2. The end portion on the long side is fixed to the screen body 2 by sewing. Moreover, the edge part of the short side in each trapezoid member 51 is mutually bonded by the eyelet 52 which consists of metal materials. A wire 6 is inserted between the trapezoidal members 51.
Note that the height of each trapezoidal member 51 is half the difference between the width between the crossing sides A on the winding shaft 3 side and the holding member 4 side and the width between the crossing sides A in the central portion. Also, the height from each intersection A to the eyelet 52 is set to be high.

  As shown in FIG. 1, the string member tension applying mechanism and the pantograph mechanism 7 as a support mechanism have a plurality of arm portions 71 connected to bendable and extendable. The two tip portions 71A are rotatably attached to the screen cover 9, and the two tip portions 71B on the upper side in FIG. 1 are rotatably attached to the holding member 4, respectively. That is, the pantograph mechanism 7 supports the holding member 4 at two locations. And the pantograph mechanism 7 isolates the winding shaft 3 and the holding member 4 close to each other as each arm portion 71 bends and stretches.

Here, since both ends of the wire 6 are supported by the take-up shaft 3 and the holding member 4 so as to be located outside each crossing side A, the take-up shaft 3 and the hold are held by the pantograph mechanism 7. By isolating the member 4, a tension is applied to the wire 6 along the extending direction of each intersection A. The length of the wire 6 is adjusted in each wire fixing portion 41 so that a predetermined tension is applied to the wire 6 in a state where the winding shaft 3 and the holding member 4 are separated by the pantograph mechanism 7. Yes.
In a state where a predetermined tension is applied to the wire 6, the wire 6 comes into contact with the eyelet 52 (see FIG. 4) in the tubular member 5, and the tubular member 5 provided at each crossing side A has a crossing direction. A tension is applied along. That is, the eyelet 52 functions as a contact portion in the present invention.

The tension applying mechanism 8 for the main body includes a spring coil 81 that urges the central shaft 31 in the direction in which the screen main body 2 is wound up by separating the winding shaft 3 and the holding member 4 by the pantograph mechanism 7. ing.
The spring coil 81 as an urging member has a configuration generally used for winding the screen body 2 around the winding shaft 3, and therefore detailed illustration is omitted, but as shown in FIG. 31 is attached to cover 31. The spring coil 81 rotates the center shaft 31 in the direction in which the screen body 2 is pulled out, thereby generating a biasing force that biases the center shaft 31 in the direction in which the screen body 2 is wound up. Accordingly, the tension is applied to the screen body 2 by rotating the winding shaft 3 through the central shaft 31 by the body tension applying mechanism 8.
The spring coil 81 urges the central shaft 31 in the direction in which the screen body 2 is wound up by separating the winding shaft 3 and the holding member 4 by the pantograph mechanism 7. The screen main body 2 is automatically wound around the winding shaft 3 by bringing the winding shaft 3 and the holding member 4 close to each other.

According to the present embodiment as described above, the following effects are obtained.
(1) In the screen 1, tension is applied to the screen body 2 along the crossing direction via the tubular member 5 by applying tension to the wire 6 by the pantograph mechanism 7, so that a curl is generated on the crossing side A. In addition, the screen body 2 is not wrinkled, and the flatness of the screen body 2 can be improved.
(2) In the screen 1, the pantograph mechanism 7 for applying tension to the wire 6 and the main body tension applying mechanism 8 for applying tension to the screen body 2 are independent of each other. 2 can be reliably applied with tension, and the flatness of the screen body 2 can be further improved.

(3) Since the wire 6 is slidably supported by the central shaft 31 that rotates as the winding shaft 3 rotates, even if the central shaft 31 is urged by the spring coil 81. It slides relative to the central shaft 31 and is not affected by the urging force. Therefore, tension can be reliably applied to the wire 6 and the screen body 2 with a simple configuration, and the flatness of the screen body 2 can be further improved.

(4) Since the wire 6 is supported on the central shaft 31 through the notch 32 formed along the rotation direction of the winding shaft 3, the winding shaft 3 and the holding member 4 are supported by the pantograph mechanism 7. , The screen main body 2 can be automatically wound around the winding shaft 3 and at the same time, the wire 6 can be wound around the winding shaft 3. Therefore, the storage property of the screen 1 can be improved. Further, since the wire 6 can move along the notch 32 even when the central shaft 31 is urged by the spring coil 81, the wire 6 is not affected by the urging force. Therefore, the pantograph mechanism 7 as the string member tension applying mechanism and the main body tension applying mechanism 8 can be maintained independently, and the flatness of the screen body 2 can be further improved.

(5) Since the screen body 2 has a pincushion-like rotational symmetry shape, a tension is applied to the wire 6 by the pantograph mechanism 7 so that the screen body 2 is connected to the screen body 2 via each tubular member 5. Tension can be applied radially from the center toward the outer periphery. Therefore, the flatness of the screen body 2 can be further improved.
(6) Since the plurality of tubular members 5 are provided along each crossing side A, tension can be applied to the screen body 2 at a plurality of portions along the crossing direction. Therefore, wrinkles are unlikely to occur in the screen body 2 and the flatness of the screen body 2 can be improved.

(7) The height of each trapezoidal member 51 is half the difference between the width between the crossing sides A on the winding shaft 3 side and the holding member 4 side and the width between the crossing sides A in the center portion. Since the height from each crossing side A to the eyelet 52 is set to be longer than that, the screen body 2 and the wire 6 are in contact with each other when the wire 6 is wound around the winding shaft 3. You can avoid it. Therefore, the screen body 2 can be prevented from being damaged.
(8) The tubular member 5 includes an eyelet 52 that abuts against the wire 6, and the eyelet 52 is made of a metal material, so that wear of the tubular member 5 can be suppressed. Therefore, the life of the screen 1 can be extended.
(9) Since the pantograph mechanism 7 supports the holding member 4 at two locations, it is difficult for twisting to occur between the winding shaft 3 and the holding member 4, and the flatness of the screen body 2 can be improved. it can.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.
In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
FIG. 5 is a schematic view of the screen 1A according to the second embodiment of the present invention as seen from the back side. In addition, in FIG. 5, the screen cover 9 is seen through.
In the first embodiment, the screen 1 includes the string member tension applying mechanism and the pantograph mechanism 7 as a support mechanism. On the other hand, in the present embodiment, the screen 1A is different in that the screen 1A includes two actuators 10 as the tension applying mechanism for the string-like member, and the pantograph mechanism 7 functions only as a support mechanism.

As shown in FIG. 5, the holding member 4 is provided with two wire fixing portions 41 </ b> A that fix the other end portion (the upper end portion in FIG. 5) of the wire 6 on both sides. In the present embodiment, the wire fixing portion 41A completely fixes the other end of the wire 6 unlike the wire fixing portion 41 (see FIG. 3) in the first embodiment.
Each actuator 10 is arranged outside the intersecting side A of the screen body 2 and applies a predetermined tension along the extending direction of each intersecting side A to the wire 6 by rotating the rotating shaft 10A.
Then, both ends of the wire 6 are supported by the rotating shaft 10A of each actuator 10 and the wire fixing portion 41A of the holding member 4 so as to be located outside each crossing side A.

In this embodiment as well, the same actions and effects as (5) to (9) in the first embodiment can be obtained, and the following actions and effects can be obtained.
(10) Since each actuator 10 applies a predetermined tension along the extending direction of each intersection A to the wire 6 by rotating the rotary shaft 10A, the pantograph mechanism 7 takes up the winding shaft. 3 and the holding member 4 can be brought close to each other so that the screen body 2 can be automatically wound around the winding shaft 3 and at the same time the wire 6 can be wound around the rotating shaft 10A. Therefore, the storage property of the screen 1A can be improved.

(11) In the screen 1 </ b> A, tension is applied to the screen body 2 along the intersecting direction via the tubular member 5 by applying tension to the wire 6 by the actuator 10, so The flatness of the screen body 2 can be improved without causing wrinkles on the screen body 2.
(12) In the screen 1A, the actuator 10 for applying tension to the wire 6 and the main body tension applying mechanism 8 for applying tension to the screen body 2 are independent from each other. Therefore, it is possible to reliably apply tension to the screen body 2 and to further improve the flatness of the screen body 2.

[Third Embodiment]
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.
FIG. 6 is a schematic view of the screen 1B according to the third embodiment of the present invention as viewed from the front side.
In the second embodiment, the screen 1A includes the pantograph mechanism 7 as a support mechanism. On the other hand, in this embodiment, the screen 1B is provided on two sides of the two hook-shaped portions 11A suspended from the ceiling and on both sides of the holding member 4, and two annular shapes on which the hook-shaped portions 11A are locked. And the support mechanism is different in that the support mechanism is composed of the hook-shaped portion 11A and the annular portion 42.
Also in this embodiment, the same operations and effects as the operations and effects in the second embodiment can be achieved.

[Modification of Embodiment]
Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope in which the object of the present invention can be achieved are included in the present invention.
In each said embodiment, the winding shaft 3 was arrange | positioned at the floor surface side, and the holding member 4 was arrange | positioned at the ceiling side. On the other hand, for example, a winding shaft may be disposed on the ceiling side and a holding member may be disposed on the floor surface side, and the winding shaft and the holding member are disposed so as to be substantially parallel to the wall surface. May be. In addition, when the winding shaft is arranged on the ceiling side and the holding member is arranged on the floor surface side, the weight of the holding member is increased so that the extending direction of each intersecting side with respect to the screen body is extended. Tension can be applied. That is, the holding member can function as a main body tension applying mechanism.

In each of the above-described embodiments, the pantograph mechanism 7 and the actuator 10 are employed as the tension applying mechanism for the string-like member, and the main body tension applying mechanism 8 includes the spring coil 81 that rotates the winding shaft 3. On the other hand, the string member tension applying mechanism and the main body tension applying mechanism may have other configurations, as long as they are independent from each other.
In each said embodiment, although the screen main body 2 was made into the shape which has rotational symmetry of the pincushion shaft shape, you may make it trapezoid, for example. In short, the screen body has a curved shape so that the width between the crossing sides in the central portion is smaller than the width between the crossing sides on at least one of the winding shaft side and the holding member side. Just do it.

  In each said embodiment, although the tubular member 5 was provided with two or more along each intersection A, you may provide only one tubular member in each intersection. Moreover, in each said embodiment, although the tubular member 5 was set as the structure which bonded two trapezoidal members 51, the shape and length of a tubular member may be set how. For example, the tubular member may be formed in a cylindrical shape and a cylindrical portion through which the string-like member is inserted, and an arm portion that connects the cylindrical portion and the screen body. In short, the tubular member only needs to be formed in a tubular shape that is provided at each crossing side and penetrates along the extending direction of each crossing side.

In each of the embodiments described above, the tubular member 5 includes the eyelet 52 made of a metal material as the contact portion. On the other hand, you may employ | adopt the fastener which consists of synthetic resins etc. as a contact part, for example. In short, it is sufficient that the wear of the tubular member can be suppressed at the contact portion. In addition, the tubular member does not need to be provided with the contact part.
In each said embodiment, the pantograph mechanism 7 as a support mechanism, the hook-shaped part 11A, and the cyclic | annular part 42 supported the holding member 4 in two places. On the other hand, the support mechanism may support the holding member at one place, and may further support at three or more places.
In the first embodiment, the winding shaft 3 is formed with the notch 32, and the wire 6 is supported by the central shaft 31 through the notch 32. On the other hand, for example, the central shaft may be configured to protrude from the winding shaft, and the wire may be supported on the central shaft without using the notch.

  Since the flatness of the screen can be improved, the present invention can be suitably used for a projector screen used for a presentation or home theater.

The schematic diagram which looked at the screen which concerns on 1st Embodiment of this invention from the back side. The schematic diagram which shows the edge part of the winding shaft in the said embodiment. The schematic diagram which shows the part which is supporting the wire in the holding member in the said embodiment. The schematic diagram which expanded the vicinity part of the tubular member in the said embodiment. The schematic diagram which looked at the screen which concerns on 2nd Embodiment of this invention from the back side. The schematic diagram which looked at the screen which concerns on 3rd Embodiment of this invention from the front side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A, 1B ... Screen, 2 ... Screen main body, 3 ... Winding shaft, 4 ... Holding member, 5 ... Tubular member, 6 ... Wire (string-like member), 7 ... Pantograph mechanism (Tension adding mechanism for string-like member) , Support mechanism), 8 ... tension applying mechanism for main body, 10 ... actuator (tension applying mechanism for string-like member), 11A ... hook-shaped part (supporting mechanism), 31 ... central axis, 32 ... notch, 42 ... annular Part (support mechanism), 52 ... eyelet (contact part), 81 ... spring coil (biasing member), A ... crossing side.

Claims (7)

A substantially rectangular screen body having flexibility, one side of the screen body, a winding shaft for winding the screen body, and a side opposite to the side held by the winding shaft are held. A screen comprising a holding member,
Two intersecting sides that respectively intersect the winding shaft and the two sides held by the holding member have a width between the intersecting sides on at least one of the winding shaft side and the holding member side. On the other hand, it is a curved shape so that the width between the intersecting sides in the central portion is reduced,
A tubular member formed in a tubular shape provided in each of the intersecting sides and penetrating along the extending direction of the intersecting sides;
Two string-like members that are supported at both ends so as to be located outside the crossing sides and are inserted through the tubular member;
A tension applying mechanism for the main body that applies tension to the screen along the extending direction of the intersecting sides;
A screen comprising a tension applying mechanism for a string-like member that applies tension to the string-like member along the extending direction of each of the intersecting sides. The screen of claim 1,
The take-up shaft is formed in a cylindrical shape, has the same rotation shaft as the take-up shaft, and has a configuration in which a central axis that rotates with the rotation of the take-up shaft is inserted,
The string member tension applying mechanism is:
It is composed of a pantograph mechanism that closely separates the winding shaft and the holding member,
The tension applying mechanism for the main body is
An urging member that urges the central axis in a direction in which the screen main body is wound, by separating the winding shaft and the holding member by the string member tension applying mechanism;
One of the string-like members is slidably supported on the central axis, and the other end is supported by the holding member. The screen according to claim 2.
The winding shaft is formed with a notch along the rotation direction of the winding shaft,
The screen is characterized in that the string-like member is supported by the central axis through the notch. The screen according to any one of claims 1 to 3,
Each of the intersecting sides has a curved shape so that the width between the intersecting sides in the center portion is smaller than the width between the intersecting sides on the winding shaft side and the holding member side,
The screen body has a shape having rotational symmetry. The screen according to any one of claims 1 to 4,
A plurality of the tubular members are provided along the intersecting sides. The screen according to any one of claims 1 to 5,
The tubular member is
A contact portion that contacts the string member;
The screen, wherein the contact portion is made of a metal material. The screen according to any one of claims 1 to 6,
A support mechanism for supporting the holding member;
The screen is characterized in that the support mechanism supports the holding member in at least two places.

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