JP2010210971A - Screen - Google Patents

Abstract

A screen capable of improving the flatness of a screen substrate is provided.
A screen base material is attached to one surface of the screen base material, and is substantially orthogonal to a first direction (A direction) that is an extension direction of the screen base material, and a second direction along the one surface ( B direction), and a stretching device 5 that stretches and contracts the screen base material. The stretching device 5 extends along the second direction and extends in the first direction of the screen base material. And a plurality of first rod members 711, 712, 721, and 722 that are rotatably connected to each other, and extend and contract along the first direction to support the member 6 An adjustment mechanism (pantograph link) 7 that adjusts the position of the first support rail 4, the support body 4 includes a first guide rail 44 that extends in the second direction, and the adjustment mechanism 7 includes a first guide rail 44. Allow rotation of one rod-like member, Having a first sliding portion that slides along the Doreru 44.
[Selection] Figure 4

Description

  The present invention relates to a screen, and more particularly to a folding screen.

  Conventionally, a screen that reflects image light incident from an image projection apparatus such as a projector and displays an image corresponding to the image light is known. As such a screen, a screen including a flexible screen base material formed in a sheet shape and a housing that houses the screen base material is known (see, for example, Patent Document 1). ).

In the screen described in Patent Document 1, a screen base material (screen cloth) is wound around a winding shaft in a casing (accommodating case) and stored in the casing, and a main frame extends from the casing to the outside. By stretching, the wound screen substrate is stretched.
More specifically, the leading edge of the screen base in the drawing direction is supported by an upper edge bar, and the upper edge bar is engaged with two upper frames constituting the main frame. In addition, the two lower frames constituting the main frame are pivotally coupled to the inside of the housing, and are connected to the two upper frames so as to be rotatable, whereby the main frame has a substantially rhombus shape. Configure the link. By extending such a main frame, the screen base material is stretched, and by contracting the main frame, the screen base material is taken up by the take-up shaft.

JP 2009-25336 A

  However, in the screen described in Patent Document 1 described above, since there is no configuration for maintaining the flatness of the screen base material between the upper end and the lower end of the screen base material, the screen base material is bent, etc. There is a problem that the flatness of the reflecting surface is impaired. When image light is projected onto such a reflective surface, an image corresponding to the image light is deteriorated.

  This invention is providing the screen which can improve the planarity of the extended screen base material.

  In order to achieve the above-described object, a screen of the present invention includes a flexible screen base material and a first direction that is attached to one surface of the screen base material and extends the screen base material. And at least one support disposed along a second direction along the one surface, and extending and contracting along the first direction so that the screen base material extends in the first direction. And a telescopic device that extends and contracts along with the support member, which extends along the second direction and supports the edge of the screen base on the tip side in the first direction, and rotates with each other And an adjustment mechanism configured to adjust the position of the support member by extending and contracting along the first direction. The support body faces the adjustment mechanism. In the second direction A first guide rail that extends, and the adjustment mechanism allows the first rod-shaped member to rotate with respect to the first guide rail, and slides along the first guide rail. It has a sliding part.

  Here, examples of the rod-shaped member include a cylindrical member having a substantially circular shape or a rectangular shape in cross-sectional view and formed hollow or solid. Other examples include a structure formed by laminating a plurality of horizontally long plate-like bodies, and a rod-like member having a cross-sectional shape such as a substantially H shape, a substantially N shape, or a substantially D shape. Can be mentioned.

  According to the present invention, the first sliding portion provided in the adjustment mechanism constituted by the plurality of first rod-shaped members is the first guide rail of the support provided in the screen base material when the adjustment mechanism is expanded and contracted. Therefore, the support is moved via the first sliding portion and the first guide rail according to the expansion and contraction of the adjustment mechanism. That is, since the first shaft-like member is slidable at the first sliding portion with respect to the first guide rail along the second direction, the first shaft-like member is supported regardless of the expansion / contraction state (position) of the adjustment mechanism. The body can be maintained in a state along the second direction. Therefore, since the flatness of the portion of the screen base material where the support is provided can be improved, the flatness of the stretched screen base material can be improved. Moreover, when the screen includes a plurality of such support bodies and first sliding portions, the flatness of the screen base material can be further improved.

  In the present invention, the adjustment mechanism is configured in a substantially rhombus shape by the plurality of first rod-shaped members, and one diagonal line has a pantograph link along the first direction, and the first sliding portion is the pantograph It is preferable that the link is disposed substantially symmetrically about an imaginary straight line that passes through the end of the first direction in the first direction and extends along the first direction.

According to the present invention, since the adjustment mechanism has the pantograph link, the screen base material supported by the support member can be easily and smoothly expanded and contracted as compared with the case of having a multistage rod. Since the size of the screen can be reduced, the screen can be reduced in size.
In addition, since the first sliding portions that engage with the guide rails of the same support are arranged substantially symmetrically about the virtual straight line, the first sliding portions are each along the second direction. Will be placed. According to this, the support body can be easily aligned in the second direction during expansion and contraction of the pantograph link. Therefore, the flatness of the screen base material can be reliably improved.

  In the present invention, the telescopic device is disposed substantially symmetrically about the imaginary straight line, and is supported by a pair of first rod-shaped members positioned on the distal end side in the first direction of the pantograph link. And the support member includes a second guide rail extending along the second direction, and the pair of second rod-shaped members have substantially the same dimensions and are rotatably connected to each other. The pair of second bar-shaped members engage with the second guide rail, respectively, and allow the second bar-shaped member to rotate with respect to the second guide rail, and along the second guide rail. It is preferable to have the 2nd sliding part to slide, respectively.

  According to the present invention, the pair of second rod-shaped members are pivotally supported by the pair of first rod-shaped members on the distal end side in the first direction substantially symmetrically about the imaginary straight line, and the pantograph link, the support member, Is crosslinked. According to this, since the supporting member can be supported at at least two places, it is possible to suppress the bending of the supporting member, and consequently the edge of the screen base material on the front end side in the first direction.

  At this time, the pair of second rod-shaped members are pivotally connected to each other and are pivotally supported by the pair of first rod-shaped members positioned on the distal end side in the first direction. These second rod-like members are each provided with a second sliding portion that slides along the second guide rail and allows the first rod-like member to rotate with respect to the second guide rail. According to this, in synchronization with expansion and contraction of the pantograph link, each second bar-shaped member slides along the second guide rail and rotates with respect to the second guide rail and the first bar-shaped member. Therefore, the support member can always be maintained along the second direction regardless of the expansion / contraction state (position) of the pantograph link. Therefore, the flatness of the screen substrate can be reliably maintained.

In the present invention, it is preferable that an end of the pantograph link on the tip side in the first direction is engaged with the support member.
According to the present invention, since the support member is supported by the pantograph link and the pair of second rod-shaped members, the support member can be stably supported along the second direction. Therefore, the stretched state along the second direction of the screen base material can be stabilized.

  In the present invention, a housing is provided for housing the screen base material and the telescopic device, the housing is provided with a third guide rail extending along the second direction, and the telescopic device is the virtual A pair of third rod-shaped members arranged substantially symmetrically about a straight line and pivotally supported by the pair of first rod-shaped members positioned on the proximal end side in the first direction, Have substantially the same dimensions and are pivotably connected to each other, and the pair of third bar members engage with the third guide rail, respectively, and the third bar member with respect to the third guide rail. It is preferable to have a third sliding portion that allows the rotation of the second sliding portion and slides along the third guide rail.

  According to the present invention, the pair of third rod members having substantially the same dimensions are arranged symmetrically about the above-described virtual straight line, and are pivotally supported on the pair of first rod members on the proximal end side in the first direction. Is done. These third rod-shaped members each have a third sliding portion that slides along the second guide rail provided in the housing and allows the third rod-shaped member to rotate with respect to the third guide rail. According to this, even if the pantograph link that engages the housing expands and contracts, the distance from the housing to the pivot support position of the third rod-shaped member in the pair of first rod-shaped members on the proximal end side in the first direction is Are substantially the same. For this reason, the expansion-contraction direction of a pantograph link can be made into the orthogonal | vertical direction with respect to a housing | casing. Therefore, by setting the vertical direction as the first direction, the pantograph link can be reliably expanded and contracted along the first direction. Moreover, since the pantograph link and the housing are bridged by each third bar-shaped member, the expansion and contraction operation of the pantograph link can be stabilized.

In the present invention, the first guide rail has an opening formed along the second direction and into which the first sliding portion is inserted, and the first sliding portion has the opening. It is preferable to have a shaft portion having a substantially circular shape in cross-sectional view through which is inserted.
According to the present invention, the shaft portion inserted into the opening formed in the first guide rail is formed in a substantially circular shape in cross section, so that the first rod-shaped member rotates with respect to the first guide rail. And sliding can be performed smoothly. Therefore, the sliding along the first guide rail of the first sliding portion according to the expansion and contraction of the adjusting mechanism and the movement of the support body can be performed smoothly.

In the present invention, a plurality of the supports are provided, and the tension of each of the supports according to the expansion and contraction of the adjustment mechanism is adjusted between the edge of the opening and the shaft in the first direction. It is preferable that a clearance for this is set.
According to the present invention, the clearance between the edge of the opening and the shaft portion can absorb the deviation of each member of the screen due to manufacturing error, so the tension applied to each support during expansion and contraction of the adjustment mechanism Can be adjusted evenly. Therefore, the flatness of the screen base material to be extended can be further enhanced.

The perspective view which looked at the screen which concerns on one Embodiment of this invention from the front side. The perspective view which looked at the screen at the time of the expansion | extension in the said embodiment from the front side. The perspective view which looked at the screen at the time of contraction in the embodiment from the front side. The figure which looked at the screen at the time of the expansion | extension in the said embodiment from the back side. The figure which looked at the screen at the time of contraction in the embodiment from the back side. The side view which shows the screen at the time of the expansion | extension in the said embodiment. The side view which shows the screen at the time of shrinkage | contraction in the said embodiment. The perspective view which shows the connection member in the said embodiment. Sectional drawing which shows the guide rail of the support body in the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Overall configuration of screen]
1 to 3 are perspective views of the screen 1 according to the present embodiment as viewed from the front side. 1 and 2 are perspective views showing a state in which the expansion / contraction device 5 constituting the screen 1 is extended, and FIG. 3 is a perspective view showing a state in which the expansion / contraction device 5 is contracted. In FIG. 2 and subsequent figures, the illustration of the screen base material 3 is omitted.
As shown in FIGS. 1 to 3, the screen 1 according to the present embodiment is configured as a portable folding screen, and the screen base material 3 is attached to the screen base 3 by an extension device 5 housed in the housing 2. By pulling out in the direction (corresponding to the first direction of the present invention), the image light incident from a projector or the like is reflected, and a display area for displaying an image corresponding to the image light is formed. The screen 1 includes a housing 2 (FIG. 1), a screen base material 3 (FIG. 1), a plurality of supports 4 (FIGS. 1 to 3), and a telescopic device 5 (FIGS. 1 to 3). Prepare.

[Case structure]
The housing 2 includes a box-shaped housing 21 (FIG. 1) having an opening 211 that opens upward, a lid member (not shown) that closes the opening 211, and an interior of the box-shaped housing 21. It is provided with a support structure 22 (FIGS. 2 and 3) arranged along the bottom surface, and is placed on an installation surface such as a floor. Of these, the lower surface of the box-shaped housing 21 is provided with a leg portion that is in contact with the installation surface (not shown).

  As shown in FIGS. 2 and 3, the support structure 22 is a substantially flat plate-like member, and is formed in a substantially rectangular shape in plan view having a longitudinal direction in one direction (B direction described later). A support portion 23 that pivotally supports rod-like members 711 and 712 of a pantograph link 7 to be described later is provided at substantially the center of the upper surface 221 of the support structure 22. Further, a pair of guide rails 24 arranged on the upper surface 221 so as to sandwich the support portion 23 and extending along the longitudinal direction of the upper surface 221 (the right guide rail in FIGS. 2 and 3 is 24L). The left guide rail is 24R). These guide rails 24 correspond to the third guide rail of the present invention, and engage with rod-like members 81 and 82 constituting the lower sub link 8 described later.

[Configuration of screen substrate]
The screen base material 3 has flexibility and is formed in a sheet shape having a substantially rectangular shape when viewed from the front with the horizontal direction (the same direction as the longitudinal direction of the support structure 22) being the longitudinal direction. A reflection surface that reflects incident image light is formed on the front surface 31 of this screen base material 3 (the surface opposite to the side facing the telescopic device 5 described later). A plurality of supports 4 are arranged at equal intervals along the A direction on the back surface 32 of the screen base material 3 (the surface facing the telescopic device 5 described later). Such a screen base material 3 is drawn out from the box-shaped casing 21 and expanded by extending the expansion / contraction device 5 in the A direction, and by contracting the expansion / contraction device 5 in the direction opposite to the A direction, Is housed in a cylindrical housing 21.

[Configuration of telescopic device]
4 and 5 are views of the screen 1 when stretched and contracted as seen from the back side. 6 and 7 are side views showing the screen 1 in a state where the pantograph link 7 is expanded and contracted, respectively.
First, the telescopic device 5 will be described.
The expansion / contraction device 5 expands / contracts (lifts / lowers) along the A direction from the box-shaped casing 21 to expand / contract the screen base material 3. As shown in FIGS. 4 to 7, the telescopic device 5 includes a support member 6, a pantograph link 7, a lower sublink 8, and an upper sublink 9 as an adjustment mechanism for adjusting the position of the support member 6.

(Configuration of support member)
The support member 6 supports the edge in the A direction of the screen base material 3. This support member 6 is a prismatic member having a substantially rectangular shape in cross-section, and is perpendicular to the A direction and is a direction along the back surface 32 (FIG. 1) of the screen base material 3 (the first embodiment of the present invention). (Corresponding to two directions). Such a support member 6 includes a support portion 61 and a pair of guide rails 62.
Among these, the support part 61 pivotally supports the pair of rod-like members 721 and 722 of the pantograph link 7.

  The pair of guide rails 62 (in FIG. 4 and FIG. 5, the guide rail located on the left side is 62L and the guide rail located on the right side is 62R) corresponds to the second guide rail of the present invention, and the support member 6 Is provided so as to extend along the longitudinal direction (B direction) of the support member 6 on the surface facing the pantograph link 7. These guide rails 62 engage with connecting members 911 and 921 provided on a pair of rod-shaped members 91 and 92 constituting the upper sub link 9 described later. Then, as the pantograph link 7 is moved up and down, the connecting members 911 and 921 slide along the guide rails 62 in a direction away from and close to the center of the support member 6, thereby causing the rod-shaped members 91 and 92. Is rotated with respect to the guide rail 62. The operation of the upper sub link 9 that engages with the guide rail 62 will be described in detail later.

[Configuration of pantograph link]
The pantograph link 7 has a substantially rhombus shape in which a lower link 71 and an upper link 72 positioned below and above are rotatably combined.
Specifically, the pantograph link 7 includes four rod-like members 711, 712, 721, 722 having substantially the same dimensions. That is, the pantograph link 7 includes a lower link 71 configured by a pair of rod-like members 711 and 712 positioned on the lower left side and the right side when viewed from the rear side so as to be rotatable in a substantially V shape. A pair of rod-like members 721 and 722 positioned on the left side and the right side are configured to be combined with an upper link 72 that is configured to be rotatable in a substantially inverted V shape. The rod-like members 711 and 721 are rotatably connected to each other, and the rod-like members 712 and 722 are rotatably connected to each other. The rod-shaped members 711 and 712 are respectively pivotally supported by the above-described support portion 23, and the rod-shaped members 721 and 722 are respectively pivotally supported by the above-described support portion 61.
And this pantograph link 7 is arrange | positioned so that the diagonal line which connects the connection site | part of the rod-shaped members 711,712 and the connection site | part of the rod-shaped members 721,722 along the A direction. Note that the rod-like members 711, 712, 721, and 722 having a substantially rectangular shape in cross section correspond to the first rod-like member of the present invention.

As shown in FIG. 4, such a pantograph link 7 has a narrower angle between the rod-shaped members 711 and 712 and a smaller angle between the rod-shaped members 721 and 722, and a smaller angle between the rod-shaped members 711 and 721, and The rod-shaped members 712 and 722 move so as to increase the included angle, thereby extending in the A direction. In addition, as shown in FIG. 5, the pantograph link 7 has a large sandwich angle between the rod-shaped members 711 and 712 and a sandwich angle between the rod-shaped members 721 and 722, and a sandwich angle between the rod-shaped members 711 and 721, and By moving so that the included angle between the rod-shaped members 712 and 722 is reduced, the rod-shaped members 712 and 722 contract in the direction opposite to the A direction.
Although not shown, each rod-like member 711, 712 is engaged with the other end of a posture maintaining member such as a gas spring whose one end is pivotally supported by the support structure 22, and the posture maintaining member The posture (height position) of the pantograph link 7 is maintained.

  As shown in FIGS. 6 and 7, a plurality of connecting members 73 are provided on the surface of the pantograph link 7 that faces the screen substrate 3. More specifically, each connecting member 73 is symmetrical with respect to the support body 4 attached to the back surface 32 (FIG. 1) as viewed from the back surface side (rotating fulcrums of the rod-shaped members 721 and 722). It is provided at a position that passes through these connecting portions and is a virtual straight line L1 along the A direction (that is, substantially symmetrical about the above-described diagonal line), and is associated with a guide rail 44 to be described later of each of the supports 4. Match. Each connecting member 73 moves up and down each support body 4 and expands the screen base 3 while sliding along the guide rail 44 according to the expansion and contraction of the pantograph link 7. These connecting members 73 correspond to the first sliding portion of the present invention.

FIG. 8 is a perspective view showing the connecting member 73.
As shown in FIG. 8, the connecting member 73 includes a cylindrical shaft portion 731 having a substantially circular shape in cross section, a large diameter portion 732 having a larger diameter than the shaft portion 731, and the large diameter portion 732. And a flat surface 733 perpendicular to the axial direction of the shaft portion 731.
Among these, the shaft portion 731 is disposed in the opening 443 of the guide rail 44 when engaged with the guide rail 44. The large diameter portion 732 is disposed in the guide rail 44. The engagement between the connecting member 73 and the guide rail 44 will be described in detail later.

[Configuration of lower sub-link]
As shown in FIGS. 4 to 7, the lower sub link 8 is attached to the opposite side of the lower link 71 to the side facing the screen base 3, and slides along the aforementioned guide rails 24 </ b> L and 24 </ b> R. The pantograph link 7 is moved up and down vertically with respect to the support structure 22. The lower sub-link 8 is configured by a pair of rod-shaped members 81 and 82 each having a size approximately half of that of the rod-shaped member 711 and having a substantially rectangular shape in cross-section so as to be rotatable. Specifically, the lower sub link 8 is configured in a substantially inverted V shape with respect to the lower link 71 having a substantially V shape when viewed from the back side, and the rod member 81 is pivotally supported by the rod member 711 to form a rod shape. The member 82 is pivotally supported by the rod-shaped member 712. These rod-shaped members 81 and 82 correspond to the third rod-shaped member of the present invention.

  As shown in FIGS. 6 and 7, the end portions of the rod-shaped members 81 and 82 on the opposite side to the connection portion are engaged with the guide rails 24L and 24R and along the guide rails 24L and 24R. The connecting members 811 and 821 as the third sliding portions that slide are supported by the shaft. These connecting members 811 and 821 allow the rod-shaped members 81 and 82 to rotate with respect to the guide rails 24L and 24R.

As shown in FIGS. 4 and 5, the rotation fulcrum that is a connecting portion of these rod-shaped members 81 and 82 is located on the above-described virtual straight line L1. Further, the axial support positions of the rod-shaped members 81 and 82 in the rod-shaped members 711 and 712 are substantially symmetrical about the virtual straight line L1 when viewed from the back. Further, the connection positions of the rod-shaped members 81 and 82 with respect to the guide rails 24L and 24R are set to symmetrical positions with the virtual straight line L1 as the center.
When the pantograph link 7 is expanded and contracted by the lower sub link 8 as described above, the dimensions from the support structure 22 to the shaft support positions of the rod-shaped members 81 and 82 of the rod-shaped members 711 and 712, that is, the respective shafts The height dimensions of the support positions are equal to each other. As a result, the pantograph link 7 expands and contracts in the vertical direction (A direction) with respect to the upper surface 221 of the support structure 22.

[Configuration of upper sublink]
As shown in FIGS. 4 to 7, the upper sub link 9 is provided on the opposite side of the upper link 72 from the side facing the screen base material 3, and supports the support member 6 along the B direction. The upper sub-link 9 is configured by a pair of rod-shaped members 91 and 92 each having a size approximately half that of the rod-shaped member 721 and having a substantially rectangular shape in cross-section, being rotatably connected to each other. Attached to the link 72. Specifically, the upper sub link 9 is formed in a substantially V shape with respect to the upper link 72 having a substantially inverted V shape when viewed from the back side, and the rod-shaped member 91 is pivotally supported by the rod-shaped member 721 and is formed in a rod shape. The member 92 is pivotally supported by the rod-shaped member 722. These rod-shaped members 91 and 92 correspond to the second rod-shaped member of the present invention.

  As shown in FIGS. 6 and 7, the end portions on the side opposite to the rotation fulcrum side, which is a connecting portion of the rod-shaped members 91 and 92, are engaged with the guide rails 62 </ b> L and 62 </ b> R described above, and Connection members 911 and 921 as second sliding portions that slide along the guide rails 62L and 62R are pivotally supported, respectively. The connecting members 911 and 921 allow the rod-shaped members 91 and 92 to rotate with respect to the guide rails 62L and 62R.

  In the upper sub-link 9, the pivot fulcrums of the rod-shaped members 91 and 92 are located on the above-described virtual straight line L1. Further, the axial support positions of the rod-shaped members 91 and 92 in the rod-shaped members 721 and 722 are set to positions that are substantially symmetric with respect to the virtual straight line L1 when viewed from the back. The connection positions with respect to the guide rails 62L and 62R are set to symmetrical positions with respect to the virtual straight line L1. That is, the upper sub-link 9 is arranged at a position symmetrical to the lower sub-link 8 with respect to a virtual straight line L2 (FIG. 4) passing through the center of the pantograph link 7 and extending along the B direction orthogonal to the A direction. The

  When the pantograph link 7 is expanded and contracted along the A direction by the upper sub link 9 as described above, the height positions of the connection members 911 and 921 from the support structure 22 are equalized. For this reason, when the pantograph link 7 is expanded and contracted, the support member 6 is along the B direction, and the upper end edge of the screen base material 3 is substantially parallel to the upper surface 221. Thereby, the flatness of the spread screen base material 3 is improved.

(Structure of support)
As shown in FIGS. 4 to 7, each of the plurality of support bodies 4 is a substantially rectangular column-shaped member that is a horizontally elongated substantially rectangular shape, is arranged at equal intervals along the A direction, and extends along the B direction. As shown in FIG. 1, the screen substrate 3 is attached to the back surface 32 (FIG. 1). A pair of guide rails 44 (FIG. 4 and FIG. 5) formed along the longitudinal direction (B direction) of the support 4 on the back side (surface facing the pantograph link 7) of the support 4. The left guide rail is 44L and the right guide rail is 44R). In the present embodiment, five support bodies 4 are provided. However, the number of support bodies 4 is not limited to this and may be one or more, and may not be equal.

FIG. 9 is a cross-sectional view showing the guide rail 44 of the support 4.
These guide rails 44 correspond to the first guide rails of the present invention, engage with a connecting member 73 provided on the pantograph link 7, and move close to the center of the support body 4 when the pantograph link 7 expands and contracts. The connecting member 73 is slid along the separating direction. As shown in FIG. 9, such a guide rail 44 is constituted by a pair of rail members 441 and 442 having a substantially L shape in a longitudinal section, and these rail members 441 and 442 are formed when the pantograph link 7 is expanded and contracted. It has a length according to the movement range of the connecting member 73.

  Among these, the rail member 441 located on the upper side is spaced from the back surface 41 so that one side is along the back surface 41 of the support body 4 and the other side is along the top surface 42 of the support body 4. It is fixed by the screw Sc1. The rail member 442 located on the lower side is fixed with screws Sc2 with a space between the rail member 442 and the back surface 41 so that one side is along the back surface 41 and the other side is along the bottom surface 43 of the support 4. The For this reason, a slit-like opening 443 along the B direction is formed between the rail member 441 and the rail member 442, and between the rail members 441 and 442 and the back surface 41, the same is also provided in the B direction. A space Sp along is formed.

  When the connecting member 73 engages with such a guide rail 44, the shaft portion 731 is disposed in the opening 443, and the large-diameter portion 732 is disposed in the space Sp. The flat surface 733 of the connecting member 73 is arranged along the back surface 41 with a minimum clearance. For this reason, when the screen base material 3 is extended, it is suppressed that the site | part in which the support body 4 in the screen base material 3 was provided inclines to the front side.

Further, the clearance between the edge of the opening 443 and the shaft portion 731 is to increase the flatness of the screen base material 3 when the pantograph link 7 is extended and the screen base material 3 is expanded. It is set slightly larger than the general value.
Here, each support body 4 is required to be parallel to the B direction, and each of the virtual straight lines connecting the pair of connecting members 73 located at approximately the same distance from the support structure 22 is also provided. It is required to be parallel to the B direction. However, the mounting error of the support 4 with respect to the screen base 3, the assembling error and the manufacturing error of the bar members 711, 712, 721, 722, and the mounting error of the connecting member 73 with respect to the bar members 711, 712, 721, 722. When the pantograph link 7 is extended, each support body 4 may be inclined with respect to the B direction.

  On the other hand, when the opening dimension along the A direction of the opening 443 is set to a dimension obtained by adding the above-described clearance to the cross-sectional area of the shaft portion 731, the manufacturing error can be absorbed by the clearance. As a result, when the pantograph link 7 is extended, the tension in the A direction can be evenly applied to each support body 4 via the connecting member 73, and the A in the state where each support body 4 is along the B direction. Can be moved in the direction. For this reason, the flatness of the stretched screen base material 3 can be improved.

[Screen operation]
Hereinafter, expansion and contraction of the pantograph link 7 and the screen base material 3 will be described.
In the contracted state of the pantograph link 7, as shown in FIG. 5, the supports 4 are arranged along the A direction and are substantially parallel to the B direction. At this time, the interval between the supports 4 is substantially zero. In this state, as described above, the included angle of the rod-shaped members 711 and 712, the included angle of the rod-shaped members 721 and 722, the included angle of the rod-shaped members 81 and 82, and the included angle of the rod-shaped members 91 and 92 are the largest. On the other hand, the included angle between the rod-shaped members 711 and 721 and the included angle between the rod-shaped members 712 and 722 are the smallest. In addition, each connecting member 73 is disposed on the guide rail 44 at a position farthest outward from the center of each support body 4.

  When the pantograph link 7 is extended from this contracted state, as shown in FIG. 4, the pantograph link 7 is lifted in the vertical direction (A direction) with respect to the support structure 22 by the lower sub-link 8 described above. To do. At this time, the pair of connecting members 73 that are substantially equidistant from the support structure 22 slide along the guide rails 44 provided on the same support 4 toward the center in the B direction of the support 4. However, each connection member 73 raises each support body 4 at equal intervals along the A direction. Further, the upper sub-link 9 raises the support member 6 along the A direction while maintaining the state along the B direction.

With such a configuration of the screen 1, in the state where the pantograph link 7 is most extended, the support member 6 that supports the front edge of the screen base 3 in the A direction is parallel to the B direction orthogonal to the A direction. When viewed from the front, the screen base material 3 is spread in a substantially rectangular shape.
Moreover, since each support body 4 affixed to the back surface 32 of the screen base material 3 is engaged with the pantograph link 7, the flatness of the screen base material 3 can be improved.

The screen 1 according to the present embodiment described above has the following effects.
Each connecting member 73 slides along each guide rail 44 and raises and lowers the support 4 according to the expansion and contraction of the pantograph link 7. Here, since the rod-shaped members 711, 712, 721, 722 are allowed to rotate with respect to the guide rail 44 by the connecting member 73, the support body 4 can be attached regardless of the expansion / contraction state (position) of the pantograph link 7. The state along the second direction can be maintained. Therefore, the flatness of the stretched screen base material 3 can be improved.

  As an adjustment mechanism for adjusting the position of the support member 6, the pantograph link 7 is employed, so that the screen substrate 3 can be easily expanded and contracted compared to the case of having a multistage rod, Since the size of the screen 1 when contracted can be reduced, the size of the screen 1 can be reduced.

  The connecting members 73 that engage with the guide rails 44 of the same support 4 are arranged substantially symmetrically about the virtual straight line L1. According to this, since each said connection member 73 will be each arrange | positioned along a B direction, it is easy to maintain each support body 4 in the state along the B direction at the time of expansion / contraction of the pantograph link 7. Can do. Therefore, the flatness of the screen base material 3 can be improved reliably.

  The rod-shaped members 91 and 92 are pivotally supported by the rod-shaped members 721 and 722 substantially symmetrically about the virtual straight line L1, and the pantograph link 7 and the support member 6 are bridged by the rod-shaped members 91 and 92. According to this, it is possible to stably support the support member 6, and it is possible to suppress the bending of the support member 6, and thus the edge of the screen base material 3 on the front end side in the A direction.

  The rod-shaped members 91 and 92 are connected to each other so as to be rotatable. These rod-shaped members 91 and 92 have connecting members 911 and 921 that slide along the guide rail 62 and allow the rod-shaped members 721 and 722 to rotate with respect to the guide rail 62. According to this, in synchronization with expansion and contraction of the pantograph link 7, the rod-shaped members 91 and 92 slide along the guide rail 62 and rotate with respect to the guide rail 62 and the rod-shaped members 721 and 722. . For this reason, the support member 6 can always be maintained along the second direction regardless of the expansion / contraction state (position) of the pantograph link 7. Accordingly, the flatness of the screen base material 3 can be reliably maintained.

  The bar-shaped members 721 and 722 of the pantograph link 7 are engaged with the support member 6, so that the support member 6 is stably moved along the B direction in accordance with the engagement between the bar-shaped members 91 and 92 and the support member 6. Can be supported. Therefore, the stretched state along the B direction of the screen base material 3 can be stabilized.

  The rod-like members 81 and 82 constituting the lower sub link 8 are symmetrically arranged around the virtual straight line L1 and are pivotally supported by the rod-like members 711 and 712, respectively. These rod-shaped members 81 and 82 have connecting members 811 and 821 that slide along the guide rail 24 and allow the rod-shaped members 91 and 92 to rotate with respect to the guide rail 24. According to this, even if the pantograph link 7 expands and contracts, the distances from the support structure 22 to the shaft support positions of the rod-shaped members 81 and 82 in the rod-shaped members 711 and 712 are substantially the same. For this reason, the expansion / contraction direction of the pantograph link 7 can be a direction perpendicular to the upper surface 221 of the support structure 22. Therefore, by setting the vertical direction as the A direction, the pantograph link 7 can be reliably expanded and contracted along the A direction which is the drawing direction of the screen base material 3. Further, since the pantograph link 7 and the support structure 22 are bridged by the rod-shaped members 81 and 82, the expansion and contraction operation of the pantograph link 7 can be stabilized.

  The cross-sectional shape of the shaft portion 731 that passes through the opening 443 of the guide rail 44 is substantially circular. According to this, the rotation and sliding of the rod-like members 711, 712, 721, 722 with respect to the guide rail 44 can be performed smoothly. Therefore, the sliding along the guide rail 44 of the connecting member 73 according to the expansion and contraction of the pantograph link 7 and the lifting and lowering of the support body 4 can be performed smoothly.

  Since the clearance between the edge of the opening 443 and the shaft portion 731 can absorb the displacement of each member of the screen 1 due to a manufacturing error, the tension applied to each support body 4 when the pantograph link 7 is expanded or contracted is reduced. It can be adjusted evenly. Therefore, the flatness of the screen substrate 3 to be spread can be further increased.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, as the first guide rail, the support bodies 4 extend along the B direction, are located on the left side when the support body 4 is viewed from the back side, and the connecting member 73 is engaged. The guide rail 44L is provided, and the guide rail 44R is located on the right side and engaged with the connecting member 73. However, the present invention is not limited to this. That is, the first guide rail may be configured as one guide rail with which the rod-shaped members 711 and 712 or the rod-shaped members 721 and 722 are engaged.
Further, the guide rail 62 (62L, 62R) as the second guide rail may be configured as one guide rail with which the rod-shaped members 91, 92 are engaged, respectively, and the guide rail 24 as the third guide rail. The same applies to (24L, 24R).

  In the above embodiment, the rod-like members 721 and 722 of the pantograph link 7 and the support portion 61 are pivotally supported by the support member 6. However, the present invention is not limited to this. That is, the rod-like members 721 and 722 may not support the support member 6 directly. Similarly, the rod-like members 711 and 712 may not be directly engaged with the support structure 22.

  In the said embodiment, although the expansion-contraction apparatus 5 was provided with the substantially rhombus-shaped pantograph link 7 as an adjustment mechanism, this invention is not limited to this. For example, a substantially X-shaped pantograph link in which rod-shaped members intersect can be cited, and two approximately V-shaped links in which a pair of rod-shaped members are rotatably connected are centered in the vertical direction or the horizontal direction. Pantograph links combined in a substantially symmetrical manner can be mentioned. Furthermore, it may have a configuration in which two or more pantograph links are combined. That is, the shape of the pantograph link does not matter.

  In the above-described embodiment, the expansion / contraction device 5 includes the lower sub-link 8, but the present invention is not limited thereto, and the pantograph link 7 can be expanded / contracted in the direction perpendicular to the upper surface 221 of the support structure 22. For example, the lower sublink 8 may not be provided. Similarly, if the flatness of the stretched screen base material 3 can be secured and the support member 6 can be along the B direction, the upper sublink 9 may be omitted.

  In the embodiment, the rod-shaped members 711, 712, 721, 722 as the first rod-shaped members, the rod-shaped members 81, 82 as the third rod-shaped members, and the rod-shaped members 91, 92 as the second rod-shaped members are respectively cross-sectioned. Although a rod-like member having a substantially rectangular shape is employed, the present invention is not limited to this. For example, you may employ | adopt the rod-shaped member of cross-sectional view substantially circular shape. Moreover, such a rod-shaped member may be hollow or solid. Further, instead of the rod-like members, a rod-like member constituted by laminating a plurality of horizontally long plate-like bodies may be adopted, or a cross-sectional shape such as a substantially H shape, a substantially N shape and a substantially D shape. You may employ | adopt the rod-shaped member which has.

  In the said embodiment, although the screen 1 was comprised as a portable screen provided with the housing | casing 2 mounted on an installation surface, this invention is not restricted to this. For example, the present invention can also be applied to a screen that is installed on a ceiling or the like and is used by pulling a screen base material downward from the ceiling. Further, the drawing direction of the screen base material is not limited to the upper side and the lower side, and may be lateral. That is, the drawing direction is not limited.

  The present invention can be suitably used for a folding screen.

  DESCRIPTION OF SYMBOLS 1 ... Screen, 2 ... Housing | casing, 3 ... Screen base material, 4 ... Support body, 5 ... Expansion-contraction apparatus, 6 ... Support member, 7 ... Pantograph link (adjustment mechanism), 24 (24L, 24R) ... Guide rail 3 guide rails), 44 (44L, 44R)... Guide rail (first guide rail), 62 (62L, 62R)... Guide rail (second guide rail), 73... Connecting member (first sliding portion), 81 , 82 ... Rod-shaped member (third rod-shaped member), 91, 92 ... Rod-shaped member (second rod-shaped member), 443 ... Opening, 711, 712, 721, 722 ... Rod-shaped member (first rod-shaped member), 731 ... Shaft , 811, 821 ... connecting member (third sliding portion), 911, 921 ... connecting member (second sliding portion), A ... direction (first direction), B ... direction (second direction).

Claims (7)

A flexible screen substrate;
At least one attached to one surface of the screen base material, substantially orthogonal to a first direction that is a direction for extending the screen base material, and disposed along a second direction along the one surface A support;
A stretching device that stretches and contracts along the first direction and stretches the screen base material along the first direction;
The telescopic device is
A support member extending along the second direction and supporting an end edge of the screen base in the first direction;
An adjustment mechanism that includes a plurality of first rod-like members that are rotatably connected to each other, and that expands and contracts along the first direction to adjust the position of the support member;
The support includes a first guide rail extending along the second direction on a surface facing the adjustment mechanism,
The screen according to claim 1, wherein the adjusting mechanism includes a first sliding portion that allows the first rod-shaped member to rotate with respect to the first guide rail and slides along the first guide rail. The screen of claim 1,
The adjustment mechanism is configured in a substantially rhombus shape by the plurality of first rod-shaped members, and one diagonal line has a pantograph link along the first direction,
The first sliding portion is disposed substantially symmetrically about an imaginary straight line passing through the end portion on the tip side in the first direction in the pantograph link and extending along the first direction. Screen to play. The screen according to claim 2.
The expansion and contraction device is disposed substantially symmetrically about the virtual straight line and is paired with a pair of second rods that are respectively pivotally supported by the pair of first rod members positioned on the distal end side in the first direction of the pantograph link. Comprising a member,
The support member includes a second guide rail along the second direction,
The pair of second rod-shaped members have substantially the same dimensions, and are rotatably connected to each other.
The pair of second bar members engage with the second guide rail to allow the second bar member to rotate relative to the second guide rail, and slide along the second guide rail. Each of the screens has a second sliding portion that moves. The screen according to claim 2 or claim 3,
An end of the pantograph link on the front end side in the first direction is engaged with the support member. The screen according to any one of claims 2 to 4,
A housing for housing the screen base material and the telescopic device;
The housing includes a third guide rail extending along the second direction,
The telescopic device includes a pair of third rod-like members that are arranged substantially symmetrically about the virtual straight line and are respectively supported by the pair of first rod-like members located on the proximal end side in the first direction. ,
The pair of third rod-shaped members have substantially the same dimensions, and are rotatably connected to each other.
The pair of third bar members engage with the third guide rail to allow the third bar member to rotate with respect to the third guide rail, and slide along the third guide rail. Each of the screens has a third sliding portion that moves. The screen according to any one of claims 1 to 5,
The first guide rail has an opening formed along the second direction and into which the first sliding portion is inserted.
The screen according to claim 1, wherein the first sliding portion has a shaft portion having a substantially circular shape in cross section as viewed through the opening. The screen according to claim 6.
A plurality of the supports are provided,
A clearance for adjusting the tension of each of the support members accompanying expansion and contraction of the adjustment mechanism is set between an edge of the opening in the first direction and the shaft portion. screen.

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