JP2018017850A - Screen device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a method for obtaining smoothness of a screen body that used to be difficult by extension by horizontal bar support in a vertical direction with an inexpensive and simple mechanism.SOLUTION: A screen device includes a tubular crossbar provided at an upper end portion of a screen body, and a holding member 11 for holding the upper end portion of a screen body installed in the tubular crossbar. The holding member 11 is composed of at least three division components: a left side edge holding member 12 for holding a left side edge of the screen body to pull the screen body in a left side edge direction; a right side edge holding member 13 for holding a right side edge of the screen body to pull the screen body in a right side edge direction; and a central section holding member 14 that is disposed at an intermediate section between the left side edge holding member 12 and the right side edge holding member 13 to hold a central section of the screen body.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a suspension type screen device that hangs and extends a screen body from a wall or a ceiling with a hanging tool, or a floor-standing screen device that extends by hanging a horizontal bar attached to an end of the screen body on a column. It is about.

  2. Description of the Related Art Conventionally, as screen devices used for projection, projectors, rear projections, and the like, hanging screen devices (eg, a hanging shaft type, roll-in type) and floor-standing type roll-in type screen devices are known.

In these screen devices, the following method is used as a method of holding the rectangular screen body on the horizontal bar (or winding drum).
(1) As shown in FIG. 11 (a), the upper end of the screen body 51 is sewn into a bag shape, and a horizontal bar 52 made of wood or resin is inserted into the bag-shaped part 51a. A fitting 53 such as a hanging hook is hooked on the part and the fitting 53 is suspended from a wall or ceiling (Patent Document 1).
(2) As shown in FIGS. 11B and 11C, screen holding members 62A and 62B are attached to the upper end of the screen body 61, and the screen body 61 is held in the internal space of the tubular horizontal bars 63A and 63B. The screen holding members 62A and 62B are inserted, and the fixtures 64A and 64B such as hooks are attached to the horizontal bars 63A and 63B, and the fixtures 64A and 64B are suspended from the wall or ceiling.
(3) As shown in FIG. 12, the upper end of the screen main body 71 is directly attached to a winding drum (horizontal bar) 73 with an adhesive tape 72, and the winding drum 73 is moved by a winding device 74 made of an electric motor or a spring. The one that was rolled up.
(4) As shown in FIG. 13, a recess 82 is provided in a part on the outer peripheral side of the winding drum (horizontal bar) 81, while a screen holding member 84 is attached to the upper end portion of the screen body 83, and the screen holding member 84. And the screen main body 83 are inserted into the recess 82, and the screen main body 83 is held by the resistance force in the winding drum 81 of the screen holding member 84.
(5) As shown in FIGS. 14 (a) and 14 (b), a recess 92 is provided in a part of the outer peripheral portion of the winding drum (horizontal bar) 91, while the screen holding has a shape that fits into the recess 92. The member 93 is molded with synthetic resin, the upper end of the screen main body 94 is attached to the screen holding member 93, the screen holding member 93 is pushed into the winding drum 91, and united with the winding drum 91, so that the screen main body 94 is assembled. What was to be retained.

Moreover, as a method of pulling the screen body from both sides and extending it in the horizontal direction, there are the following methods.
(6) As shown in FIGS. 15A and 15B, the stretching wire 103 is attached to both sides of the screen holding member 102 holding the screen main body 101, and this wire 103 is connected to the end of the horizontal bar 104 ( The screen body 101 is stretched by pulling in the direction of the arrow) and attaching the tip of the wire 103 to the end of the horizontal bar 104 in a state where tension is applied to the screen body 101.
(7) As shown in FIGS. 16 (a), 16 (b), and 16 (c), the left and right side portions of the screen body 111 are curved, and a pair of left and right connecting members 112 are attached to the both side portions. A wire 113 extending in the vertical direction is attached so as to be inserted into the 112, and a tension is applied between the upper frame (winding drum) 114 and the lower frame 115 via the connecting member 112, thereby causing the screen body 111 to move in the vertical and horizontal directions. (2) Patents 2 to 5 are provided with tension.
(8) As shown in FIGS. 17 (a) and 17 (b), a horizontal bar 122 is attached to the upper end of the screen body 121, and the horizontal drum 122 is applied with tension in the direction of arrow 123, and the winding drum The screen body 121 is expanded by being attached to the recess 125 of 124.
(9) As shown in FIG. 17 (c), in the roll-up type screen device, the upper side 131 a of the screen body 131 is recessed from the left and right sides of the winding body 132 when the screen body 131 is suspended. The screen body 131 is stretched by attaching an item that is cut in an arc shape and packed in length so that it is straight when attached.

(10) In the floor-standing screen device, as shown in FIG. 18, a screen holding member 142 is attached to the upper end of the screen main body 141, and these are inserted and held in the tubular horizontal bar 143. A roll entraining device 144 (see FIG. 21) is attached to the lower part of the machine.

JP 2004-205913 A JP 2009-229915 A JP 2011-123233 A JP 2012-22029 A JP 2014-6307 A

  By the way, with the recent advancement of projection performance of video projectors and projectors, it has become possible to project high-definition images, and the performance of screens that project images is also required to be improved. Fineness, chromaticity reproducibility, high brightness, high contrast and the like have been demanded. The screen size is also increasing, and the brightness and smoothness of the screen become important factors that influence the quality of the projected image. Especially when a 3D image is projected or when a screen such as a single-focus projector is projected, if the screen is not smooth, the projected image is distorted and the quality of the projector is deteriorated. It is requested to provide.

From the above point of view, when examining the above-described prior art, in the case of the above (1) (FIG. 11A), when the tension due to the weight of the screen body 51 is applied in the vertical direction, FIG. As shown in FIG. 4, when the wedge-shaped ridge 54 is generated in the lower portion of the bag-like portion 51a, the vertical ridge 55 is generated in the screen main body 51, and the screen main body 51 becomes wavy and smoothness cannot be obtained. There is a problem.
In the case of (2) (FIGS. 11B and 11C), as shown in FIGS. 19B and 19C, a wedge-shaped ridge 65 is also generated below the horizontal bars 63A and 63B. However, there is a problem that a slanted ridge 66 is generated in the entire screen body 61. Here, the heel height of the central part of the oblique ridge 66 reaches 7 to 10 mm.

In the case of (3) (FIG. 12), since the expansion ratio of the screen main body 71 and the winding drum 73 is different, there is a difference in expansion / contraction length, which leads to generation of wrinkles of the screen main body 71. In the case of (4) (FIG. 13), when the screen main body 83 expands and contracts due to environmental changes, the expansion and contraction ratios of the winding drum 81 and the screen main body 83 differ. There is a problem that wrinkles occur. Further, in the case of (5) (FIGS. 14A and 14B), the screen holding member 93 is firmly pushed into the winding drum 91 and attached, so that there is a difference in stretch length between the winding drum 91 and the screen body 94. When this occurs, there is a problem that, as shown in FIGS.

  On the other hand, when the screen main body 101 expands and contracts in the suspended state in the method of always applying tension to the screen holding member 102 as in (6) (FIGS. 15A and 15B). Since there is a difference between the inclination of the screen holding member 102 in the horizontal bar 104 in the vicinity of the end portions on both sides (the degree of slacking) and the inclination of the screen holding member 102 at the center of the screen body 101, There is a difference between the amount of pulling to the upper part and the amount of pulling to the upper part of the central part, which leads to the generation of wrinkles on the screen main body 101. As shown in FIGS. There is a problem that a so-called ridge 105 (4 to 6 mm) is generated in the part. In this case, as the tension of the spreading wire 103 is applied, the difference between the angle of the screen holding member 102 on the both sides and the angle of the central portion is generated, leading to generation of wrinkles. Further, by partially applying tension to the outside of the upper part, vertical curling wrinkles (curled wrinkles) are generated on both sides of the screen main body 101.

  In the case of (7) (FIGS. 16A, 16B, and 16C), the weight of the screen body itself is concentrated in the central portion of the screen body, so that the screen holding member is inclined, and compared with the both ends of the screen body. While the screen body is lowered, the force point for fixing the wire 113 or the like to the horizontal bar to which the screen holding member is attached is one point with the horizontal bar, so the inclination of the screen holding member near the wire attaching portion ( Since the height does not change, there is a difference in the heights of the screen holding members at both ends and the center, and there is a difference in the degree of lowering of the screen body. For this reason, the more the tension is applied to the screen holding member that holds one screen body, the more wrinkles are generated, and it becomes difficult to obtain smoothness according to the expansion and contraction of the screen body. . In addition, there is a problem that the structure of the screen device is complicated and the cost is unavoidable, for example, it is necessary to add a processing mechanism for the connecting material 112 and a winding mechanism for the wire 113. Further, the above (8) (FIGS. 17A, 17B) and 9) (FIG. 17C) has a problem that wrinkles are essentially unavoidable.

  Further, in the above-described (10) (FIG. 18) which is a floor-standing screen device, the upper horizontal bar 143 is supported at two places by a column raised from the lower roll entraining device 144 (see FIG. 21). Because of the structure, the horizontality of the horizontal bar 143 is not obtained, and the pulling force from the lower horizontal bar portion 145 is strong, so there is a difference in the amount of force between the force applied to both sides of the upper horizontal bar 143 and the force applied vertically. Therefore, there is a problem that a wedge-shaped ridge 146 is generated at the lower portion of the upper horizontal bar 143, and a vertical ridge 147 is generated in the entire screen body 141. In addition, curled ridges 148 are generated on both outer sides of the screen body 141. Here, the height of the ridge 147 reaches 8 to 10 mm.

  As described above, in any of the conventional screen devices, wrinkles are generated in the screen main body, and the image projected on the screen main body is distorted as shown in FIG. 22 (screen test image), for example.

  The present invention has been made in view of the above-described problems, and a method for obtaining the smoothness of the screen main body, which has been difficult by the stretching by supporting the upper and lower horizontal bars, can be realized by an inexpensive and simple mechanism. An object of the present invention is to provide a screen device.

In order to achieve the above object, a screen device according to the present invention comprises:
In a screen device comprising a tubular horizontal bar provided at an upper end portion of a screen main body to suspend or wind the screen main body, and a holding member disposed in the horizontal bar and holding the upper end portion of the screen main body.
The holding member is disposed on the left end side of the horizontal bar, holds the left end of the screen main body, and pulls the screen main body in the left end direction along the axial direction of the horizontal bar. A holding member and a right end holding portion arranged on the right end side of the horizontal bar to hold the right end of the screen main body and pull the screen main body in the right end direction along the axial direction of the horizontal bar; A member and a central portion holding member that is disposed in an intermediate portion between the left end portion holding member and the right end portion holding member and holds the central portion of the screen main body. (First invention).

  In the first aspect of the invention, the central holding member is divided into a plurality of holding pieces and is held by the central holding member without being affected by the tension of the left end holding member and the right end holding member. It is preferable that the upper and lower positions of the upper end of the screen body be maintained horizontally (second invention).

  In the second aspect of the present invention, a recess is provided in the horizontal bar to accommodate the left end holding member, the right end holding member, the center holding member, and the screen main body held by these holding members. When the screen main body accommodated in the recess is moved by its own weight, the long side in the sectional view of the left end holding member, the right end holding member, and the center holding member is inclined. It is preferable to be configured to be in a posture (third invention).

  Furthermore, in the first to third aspects of the invention, the left end holding member and the right end holding member are adhesively fixed to a plate-like pull holding member for holding the screen body and an end of the pull holding member. A tension piece, a bolt connected to an end portion of the tension piece via a joint, and a nut that is screwed to the bolt and applies a tensile force to the bolt by a turning operation. (4th invention).

  According to the present invention, since the holding member that holds the upper end portion of the screen body is divided into three parts along the axial direction of the horizontal bar, a slight expansion and contraction of the screen body can be dispersed and absorbed by the entire holding member. it can. In addition, even if there is a difference in expansion ratio between the screen main body and the horizontal bar, the difference in expansion / contraction distance can be obtained by applying a slight tension from both sides with the three divided holding members attached to the screen main body. Can be eliminated as the expansion and contraction of the surface of the screen body, and the generation of wrinkles on the screen body can be prevented. Also, since the left and right tensions are not applied to the center of the screen body, the center body holding member works only to hold the weight of the screen body, and is not affected by the tilt of the holding member caused by left and right pulls. It becomes possible to keep the smoothness of.

  According to the configuration of the second invention, when the left end holding member and the right end holding member are stretched and stretched, the left and right holding members are not affected by the downward force due to the weight of the screen body. Since it is pulled left and right, the screen body is moved in the left and right direction without deformation of the left and right holding members. Thus, the screen body can be stretched left and right while maintaining the horizontal position of the upper and lower positions of the upper end of the screen body held by the central holding member, and the screen can be stretched while maintaining smoothness. It becomes possible.

  According to the configuration of the third aspect of the invention, it is possible to add a stretching tension that combines the left and right pulling force and the vertical height maintaining force due to the weight of the screen body in the recess formed inside the horizontal bar. Can be surely prevented.

  According to the configuration of the fourth aspect of the invention, a fine and accurate tensile force can be applied to the screen body. When the screen body is suspended (expanded), the holding member tilts due to the weight of the screen body, and the weight of the holding member does not apply when retracted (when rolled up), so the tilting state of the holding member rises slightly. become. Despite the tension being applied from the left and right, a joint is necessary for the holding member to respond to this fine inclination. Thus, according to the present invention, it is possible to cope with the change in the load applied to the screen body, which is repeatedly performed on a daily basis.

Front view of a screen device according to an embodiment of the present invention applied to a hanging shaft type suspended screen device Schematic (a) showing a state in which the screen main body is held by the holding member and a detailed configuration diagram (b) of the holding member Partial perspective view of horizontal bar and holding member Partially broken perspective view (a) and exploded view (b) showing pulling mechanism of holding member Sectional drawing showing the pulling mechanism of the holding member of the modification of this embodiment The detailed block diagram (a) of the holding member in the screen apparatus which concerns on other embodiment of this invention, and the partial perspective view of a horizontal bar and a holding member (b) Sectional drawing (a) showing the pulling mechanism of the holding member of the modification of this embodiment, and its partial enlarged view (b) Diagram explaining the mechanism of wrinkles on the screen (1) Diagram explaining the mechanism of wrinkles on the screen (2) The figure which shows the roll entrainment type screen apparatus (a) and floor-standing type roll entrainment screen apparatus (b) to which this invention is applied. The figure which shows the method to hold | maintain a screen main body in the screen apparatus (a) of a prior art example (1), and the screen apparatus (b) (c) of a prior art example (2). The figure which shows the method of hold | maintaining a screen main body in the screen apparatus of a prior art example (3). The figure which shows the method of hold | maintaining a screen main body in the screen apparatus of a prior art example (4). The figure which shows the method to hold | maintain a screen main body in the screen apparatus of a prior art example (5) (a) (b) The figure which shows the method of extending a screen main body in the screen apparatus of a prior art example (6) (a) (b) The figure which shows the method of extending a screen main body in the screen apparatus of a prior art example (7) (a) (b) (c) The figure which shows the method of extending a screen main body in the screen apparatus (a) (b) of a prior art example (8), and the screen apparatus (c) of a prior art example (9). The figure which shows the method of extending a screen main body in the screen apparatus of a prior art example (10). FIG. 5A illustrates a state of occurrence of wrinkles in the screen device of the conventional example (1), and FIG. 6B illustrates a state of occurrence of wrinkles in the screen device of the conventional example (2). Figures (a) and (b) for explaining the state of occurrence of wrinkles in the screen device of the conventional example (5), and (c) and (d) for explaining the state of occurrence of wrinkles in the screen device of the conventional example (6). The figure explaining the generation | occurrence | production state of a flaw in the screen apparatus of a prior art example (10) (a) (b) The figure explaining the state of distortion in the screen test image

  Next, specific embodiments of the screen device according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a front view of a screen device according to an embodiment of the present invention applied to a hanging shaft type suspended screen device. FIG. 2 shows a schematic diagram (a) showing a state in which the screen body is held by the holding member arranged in the horizontal bar, and a detailed configuration diagram (b) of the holding member, respectively. FIG. 4 shows a partial perspective view of the horizontal bar and the holding member, and FIG. 4 shows a partially broken perspective view (a) and an exploded view (b) showing the pulling mechanism of the holding member, respectively.

  As shown in FIG. 1, the screen device 1 of the present embodiment includes a substantially rectangular screen main body 2, a tubular upper horizontal bar 3 disposed at the upper end of the screen main body 2, and a lower end of the screen main body 2. The upper horizontal bar 3 is held by inserting the upper end of the screen main body 2 into the upper horizontal bar 3, and the upper horizontal bar 3. The screen main body 2 is extended by being hung from a wall or a ceiling to project a movie or a projector image. Here, since the upper horizontal bar 3 and the lower horizontal bar 4 have substantially the same structure, in the following description, the configuration of the upper horizontal bar 3 (hereinafter simply referred to as “horizontal bar 3”) is representative. Only explained.

  As shown in FIG. 3, the horizontal bar 3 is made of an aluminum extruded material and has a tubular shape as a whole, and has partition walls 5 and 6 that extend in parallel in the longitudinal direction, and an outer periphery of the partition walls 5 and 6. Openings (slits) 7 and 8 extending in the longitudinal direction are formed on the sides, and an upper recess 9 and a lower recess 10 are defined between the partition walls 5 and 6 and the openings 7 and 8, respectively. It is made into a shape. Here, the lower recess 10 is a space for holding the screen body 2 and the screen holding member 11 inside the horizontal bar 3.

  As shown in FIG. 2, the screen holding member 11 includes a left end holding member 12 arranged on the left end side of the horizontal bar 3 and a right end holding member 13 arranged on the right end side of the horizontal bar 3. The central portion holding member 14 arranged in the middle portion between the left end holding member 12 and the right end holding member 13 is divided into three parts. The lengths of the left end holding member 12, the right end holding member 13 and the center holding member 14 in the longitudinal direction of the horizontal bar 3 are approximately 1/3 of the width (upper end length) of the screen body 2 (ie, a : B: c = 1: 1: 1). The lengths of the left end holding member 12 and the right end holding member 13 may be set slightly longer than the length of the center holding member 14 (for example, when the width of the screen body 2 is 2 m, the left end The length of the part holding member 12 and the right end holding member 13 is set to 700 to 1200 mm).

  The central holding member 14 is divided into a plurality of (five in the illustrated example) height holding holding pieces 14 a in the longitudinal direction, and each of the height holding holding pieces 14 a is the upper end of the screen body 2. The screen body 2 functions to hold the height of the screen body 2 without being affected by the tension of the left end holding member 12 and the right end holding member 13. Here, the length in the longitudinal direction of the horizontal bar 3 of each height holding holding piece 14a is set to 200 to 400 mm, for example.

  On the other hand, the left end holding member 12 and the right end holding member 13 are attached to the screen main body 2 independently of the central holding member 14, and the screen main body 2 is mainly used as the left end or the right end. Pulling members 12a, 13a having a function of pulling the screen body 2 and holding the height of the screen body 2, and a pulling piece (pulling) fixed to the end side of the pulling holding members 12a, 13a with an adhesive Metal fittings) 12b, 13b. More specifically, the upper end portion of the screen main body 2 is joined to the entire height of the screen main body 2 with the height holding holding piece 14a and the left and right pulling holding members 12a and 13a. And as FIG. 4 shows, the bolt 16 is connected via the joint 15 which consists of a piano wire to the edge part side of the tension | pulling piece 12b, 13b, This nut 16 distribute | arranged to the end surface of the horizontal bar 3 It is configured to be inserted through the stopper 17 and screwed into the nut 18. In this way, the holding members 14a for holding the height of the central holding member 14 and the holding members 12a and 13a for the pulling of the right end holding member 13 are attached to the upper end of the screen body 2. The screen body 2 is held by the horizontal bar 3 and suspended by being inserted into the lower recess 10 of the horizontal bar 3. Here, the recess 10 is provided with a space allowing the inclination of the holding pieces 12b and 13b for holding the height due to the weight of the screen body 2 itself.

  When the nut 21 is tightened while the screen body 2 is suspended in the recess 10 of the horizontal bar 3 in this way, the screen body 2 held by the left end holding member 12 and the right end holding member 13 becomes the bolt 16, A pulling force in the left-right direction is applied by the pulling holding members 12a and 13a through the joint 15 and the pulling pieces 12b and 13b.

  Usually, the wrinkles generated in the screen main body 2 have a characteristic of becoming large wrinkles due to slight expansion and contraction of the screen main body 2. Therefore, in the screen device 1 of the present embodiment, the left end holding member 12 and the right end holding member 13 Has a structure in which the tension applied by these end holding members 12 and 13 can be accurately extended over a distance of about 1 to 2 mm. On the other hand, the center holding member 14 has a structure that supports downward tension due to its own weight. With the holding members 12, 13, 14 thus divided into three being attached to the upper end of the screen body 2, a slight tension is applied from both sides by the left end holding member 12 and the right end holding member 13. By extending the screen body 2, even if there is a difference in expansion / contraction ratio between the screen body 2 and the horizontal bar 3, the entire holding members 12, 13, and 14 are dispersed and absorbed, and the difference in expansion / contraction distance is obtained. The expansion and contraction of the approximately 1/3 of the entire width (see the regions 18a and 18b in FIG. 2A) can be eliminated, and the occurrence of wrinkles can be prevented. In this case, since the right and left tension is not applied to the central portion of the screen main body 2, the height is not affected by the inclination of the pulling holding members 12a and 13a based on the pulling of the pulling holding members 12a and 13a. The holding piece 14a for holding acts only as a holding force against the own weight of the screen body 2, and thereby the smoothness of the screen body 2 is maintained.

  Here, the height of the holding piece 14 a for holding the height is set according to the hanging height of the screen body 2. Further, the heights of the left and right pulling holding members 12a and 13a are set to a height that is lower than the height holding holding piece 14a and corresponding to the left and right pulling forces.

  According to the screen device 1 of the present embodiment, when the screen body 2 is expanded by applying tension to the left and right pulling holding members 12a and 13a, the pulling holding members 12a and 13a are lowered by the weight of the screen body 2 itself. Since it is pulled in the left-right direction without being affected by force, the screen body 2 can be moved in the left-right direction without deformation of the pulling holding members 12a, 13a. Since the screen main body 2 is expanded in the left-right direction while the height holding holder piece 14a is maintained in a horizontal state, the screen main body 2 can be expanded while maintaining smoothness.

  In the present embodiment, the left end holding member 12, the right end holding member 13 and the center holding member 14 are arranged in the upper horizontal bar 3 at the upper end of the screen body 2. , 13 and 14 are also arranged in the lower horizontal bar 4 so that the expansion action of the screen body 2 can be performed more reliably.

  FIG. 5 is a cross-sectional view illustrating a holding mechanism pulling mechanism according to a modification of the present embodiment. This modification shows an example applied to a winding screen device in which the winding drum 3A of the hanging screen device is wound up by a winding device made of an electric motor or a spring.

  In this example, a recess 10A is formed inside the winding drum 3A, and the holding member 12a for pulling with the screen body 2 attached is inserted into the recess 10A, as in the above-described embodiment, and the screen body 2 is pulled from the left and right. The screen body 2 is configured to maintain smoothness by a balanced tension between the tension and the height holding force that maintains the height against the downward pulling force due to the weight of the screen body 2. The screen holding member 11 is the same as that of the above embodiment in that the left end holding member 12, the right end holding member 13, and the center holding member 14 are configured.

  Also in this modified example, when the screen body 2 expands and contracts due to environmental changes, the screen body 2 expands to the left and right by the tension in the left and right direction, and the tension holding members 12a and 13a move together. At this time, the left and right pulling holding members 12a and 13a and the height holding holding piece 14a are different in height, and the central part is not pulled left and right. To do. As a result, the screen body 2 around the winding drum 3A extends horizontally, so that the smoothness of the screen body 2 is obtained. When the winding drum 3A rotates the screen body 2 to wind it up, the screen body 2 It is rolled up while maintaining a smooth state. As a result, in a narrow space in the winding drum 3A, it is possible to add a drawing tension that combines the left and right pulling forces and the vertical height maintaining force due to the weight of the screen, thereby preventing wrinkles.

In the present embodiment, the tension holding members 12a and 13a and the height holding holder piece 14a are formed into a plate shape by compounding a short glass fiber or the like into an epoxy or phenol resin material whose material itself is environmentally stable. Or a plate of polycarbonate, polyamide, polyacetal or vinyl chloride having a linear expansion coefficient of 3 to 4 × 10 ⁻⁵ / ° C. or less and a tensile strength of 4.5 kg / mm ² or more. .

  FIG. 6 shows a detailed configuration diagram (a) of the holding member and a partial perspective view (b) of the horizontal bar and the holding member in the screen device according to another embodiment of the present invention.

  In this embodiment, the left end holding member 12 and the right end holding member 13 are connected to the pulling holding members 12 a and 13 a that function to pull the screen main body 2 to the left end or the right end, and the screen main body 2. It is configured to have height holding holder pieces 12c, 13c that function to hold the height, and tension pieces 12b, 13b that are fixed to the ends of the tension holding members 12a, 13a. is there. Here, like the height holding holder pieces 14a of the central holding member 14, the height holding holder pieces 12c and 13c are divided into a plurality of pieces (six in the example in the figure) in the longitudinal direction. . FIG. 7 shows a cross-sectional view (a) and a partially enlarged view (b) showing a holding member pulling mechanism according to a modification of the present embodiment. In the present embodiment and the modification thereof, the left end holding member 12 and the right end holding member 13 have a function of pulling the screen body 2 left and right by the pulling holding members 12a and 13a, and a height holding holding piece. The point which isolate | separated from the function which hold | maintains the height of the screen main body 2 by 12c, 13c is different from previous embodiment and the modification, and the basic operation effect differs from the previous embodiment and the modification. Absent. Therefore, detailed description thereof will be omitted.

  By the way, the present applicant examined the mechanism of wrinkles generated in the screen body when the screen body is suspended from a horizontal bar. According to this study, the screen body material expands and contracts due to changes in temperature, humidity, and seasonal fluctuations in the place where the screen device is used, and a rod-shaped screen support member (horizontal bar, winding drum) that fixes the screen body. However, since the strength of the screen support member is larger than that of the screen main body, the screen support member appears as a wrinkle on the screen main body side.

  There is a large numerical relationship between the amount of elongation in the plane of the screen body and the amount of wrinkles (the height of the wrinkles). That is, as shown in FIG. 8A, in the screen body 2 having a width of 1000 mm, when the length in the plane direction is reduced by 1.4 mm, it appears as a wrinkle having a height of 10 mm. This means that if the screen body 2 having a length of 1000 mm is extended by 1.4 mm, a wrinkle having a height of 10 mm is generated when the screen is fixed to a length of 1000 mm.

  Further, as shown in FIG. 8B, when the screen body 2 is pulled to both sides to give tension, if the joint 20 between the holding member 19 and the screen body 2 is 100 mm to 300 mm, the screen body 2 As a result, tension is partially applied to the left and right end portions of the wire, and wrinkles due to the joint portion 20 occur. For this reason, when tension is applied to the screen body 2, the holding members 20 at the left and right ends need to be at least one third of the width of the screen body 2 (or 700 mm to 1200 mm). The main body 2 and the joint portion 20 are joined as a long surface. When the screen 20 is held and extended with the joint 20 having a length of 100 mm and a height of 17 mm, diagonal wrinkles 21 are generated at the corners of the upper portion of the screen main body, and curled curled wrinkles are formed on the sides of the screen main body 2. 22 was found to occur.

  In the conventional hanging screen device that inserts the screen body held by the holding member into the horizontal bar and applies tension to the holding member from both sides, the reason why smoothness cannot be obtained is as follows. There is a unique screen stretching mechanism. That is, as shown in Table 1, when the inner diameter (A) of the installation site in the horizontal bar (bar-shaped pipe) 3 for fixing the holding member 19 that holds the screen main body 2 is 18.5 mm, it is attached to the screen main body 2. When the holding member 19 is installed in the horizontal bar 3 with the width (B) of the long side in a cross-sectional view being 17.5 mm and being installed in the horizontal bar 3, the descending amount (D) of the screen body 2 is 3.5 mm (see FIG. 9 (a)). Further, when the width (B) of the holding member 19 attached to the screen body 2 is reduced to 16.0 mm by 2.5 mm, the descending amount (D) of the screen body 2 is 7.5 mm (see FIG. 9B). . Therefore, if the width (B) of the holding member 19 is 17.5 mm as the width (position) at the time of initial manufacture, when the width (B) of the holding member 19 is shortened by 1.5 mm, the screen body is lowered by 4 mm. . The change in the width of the holding member 19 inside the horizontal bar 3 causes an increase in the amount by which the screen body 2 is lowered, and a slight amount of expansion / contraction of the screen body 2 causes wrinkles (1. When stretched by 4 mm, it becomes a wrinkle having a height of 10 mm (see FIG. 8), which is a cause of failure to obtain the smoothness of the screen body 2 by the horizontal bar 3.

  Conventionally, the holding member is attached to the entire width of the upper end of the screen body, and tension is applied from both sides with a wire etc. However, in this method, since strong tension is constantly applied to the screen body, The angle of the nearby holding member is close to the beam shape of the horizontal bar and is in parallel with the beam. However, the holding member at the center of the horizontal bar is pulled downward due to the weight of the screen main body and causes the rotary member to tilt obliquely. The difference between the inclination of the outer holding member in the horizontal bar and the inclination of the central part of the screen body is the difference in the height of the holding member, and the screen body has a wrinkle that causes a large wrinkle due to a slight distance shrinkage. It was causing an outbreak. The more the left and right pulling forces are applied to prevent this wrinkle, the more the holding members on both sides are closer to the bar-like beam and in a parallel state with the beam, and the holding member in the center of the 2 to 3 m long screen body is Due to the strong tension, the holding member becomes linear and causes an inclination due to the weight of the screen body. As the left and right tensions are applied, the angles of the holding members at both ends and the center change, and the difference in height between the holding members spreads to generate wrinkles.

  On the other hand, in the technique shown in the above-described embodiment, a slight distance is obtained with a pulling device that joins the holding member with both ends of the end portion of the screen body as long surfaces and does not change the angle of the holding member at both ends. I try to apply the pulling force. When tension is applied to the holding members on both sides, since the holding members on both ends are joined as long surfaces, the tension is transmitted little by little to the entire width of the screen body, and the entire screen body is expanded and contracted. On the other hand, the downward pulling force is applied horizontally to the entire screen main body because the inclination of the holding member is the same. As a result, it is possible to achieve a balanced stretching in the vertical and horizontal directions by the slight vertical tension on the left and right and the vertical stretching due to the weight of the screen body. In this way, it is possible to realize a well-balanced up / down / left / right extension despite the use of two horizontal bars, and to provide a screen device with excellent smoothness.

  In the present embodiment, the example applied to the hanging type suspension screen device shown in FIG. 1 has been described. However, the present invention can be applied to a roll-in type screen device 1A as shown in FIG. The present invention can also be applied to a floor-standing roll entrainment screen device 1B as shown in 10 (b). Here, the roll-in type screen device 1A (FIG. 10 (a)) includes a rotary type drum 23 by electric power or spring force, and the upper end of the screen body 2 is attached to the drum 23. The screen body 2 is raised and lowered by the entraining device 24. In the figure, reference numeral 25 indicates a lower horizontal bar, and reference numeral 26 indicates a handle. On the other hand, in the floor-mounted roll entrainment screen device 1B (FIG. 10B), a rotary winding cylinder 27 by electric or spring force is provided in the lower part, and the end of the screen body 2 is pulled up, and then the lower part The end portion is attached to the upright support column 28 and extended. In the figure, the reference numeral 29 indicates a roll entrainment device, the reference numeral 30 indicates an upper horizontal bar, and the reference numeral 31 indicates a support mounting portion.

  The screen device of the present invention was invented based on the principle of expansion and contraction of the material of the screen body, and can provide an image with high quality at a low cost.

1, 1A, 1B Screen device 2 Screen body 3 Upper horizontal bar (horizontal bar)
3A, 23 Winding drum 4 Lower horizontal bar 5, 6 Partition wall 7, 8 Opening (slit)
9, 10 Recess 11 Screen holding member 12 Left end holding member 12a Pulling holding member 12b Pulling piece 12c Height holding holding piece 13 Right end holding member 13a Pulling holding member 13b Pulling piece 13c Height Holding part 14 for holding Center holding member 14a Holding part 15 for holding height Joint 16 Bolt 17 Nut stopper 18 Nut 24, 29 Roll entrainment device

In these screen devices, the following method is used as a method of holding the rectangular screen body on the horizontal bar (or winding drum).
(1) As shown in FIG. 11 (a), the upper end of the screen body 51 is sewn into a bag shape, and a horizontal bar 52 made of wood or resin is inserted into the bag-shaped part 51a. An attachment 53 such as a hanging hook is hooked on the part, and the attachment 53 is suspended from a wall or ceiling .
(2) As shown in FIGS. 11B and 11C, screen holding members 62A and 62B are attached to the upper end of the screen body 61, and the screen body 61 is held in the internal space of the tubular horizontal bars 63A and 63B. The screen holding members 62A and 62B are inserted, and the fixtures 64A and 64B such as hooks are attached to the horizontal bars 63A and 63B, and the fixtures 64A and 64B are suspended from the wall or ceiling (Patent Document 1) .
(3) As shown in FIG. 12, the upper end of the screen main body 71 is directly attached to a winding drum (horizontal bar) 73 with an adhesive tape 72, and the winding drum 73 is moved by a winding device 74 made of an electric motor or a spring. The one that was rolled up.
(4) As shown in FIG. 13, a recess 82 is provided in a part on the outer peripheral side of the winding drum (horizontal bar) 81, while a screen holding member 84 is attached to the upper end portion of the screen body 83, and the screen holding member 84. And the screen main body 83 are inserted into the recess 82, and the screen main body 83 is held by the resistance force in the winding drum 81 of the screen holding member 84.
(5) As shown in FIGS. 14 (a) and 14 (b), a recess 92 is provided in a part of the outer peripheral portion of the winding drum (horizontal bar) 91, while the screen holding has a shape that fits into the recess 92. The member 93 is molded with synthetic resin, the upper end of the screen main body 94 is attached to the screen holding member 93, the screen holding member 93 is pushed into the winding drum 91, and united with the winding drum 91, so that the screen main body 94 is assembled. What was to be retained.

Further, the adhesive in the first invention to third invention, the left end holding member and the right end portion holding member includes a plate-shaped tensioning holding member for holding the screen body, the ends of the tension holding member A tension piece to be fixed, a bolt connected to an end portion of the tension piece via a joint, and a nut that is screwed to the bolt and applies a tensile force to the bolt by a turning operation. It is preferable to be carried out (fourth invention).

Claims (4)

In a screen device comprising a tubular horizontal bar provided at an upper end portion of a screen main body to suspend or wind the screen main body, and a holding member disposed in the horizontal bar and holding the upper end portion of the screen main body.
The holding member is disposed on the left end side of the horizontal bar, holds the left end of the screen main body, and pulls the screen main body in the left end direction along the axial direction of the horizontal bar. A holding member and a right end holding portion arranged on the right end side of the horizontal bar to hold the right end of the screen main body and pull the screen main body in the right end direction along the axial direction of the horizontal bar; The screen is characterized in that it has at least a three-part configuration comprising a member and a central portion holding member that is disposed in the middle portion of the left end portion holding member and the right end portion holding member and holds the central portion of the screen body. apparatus.   The central portion holding member is divided into a plurality of holding portion pieces and is held by the central portion holding member without being affected by the tension of the left end holding member and the right end holding member. The screen device according to claim 1, wherein the screen device is configured to maintain a vertical position of the screen horizontally.   Inside the horizontal bar, there is provided a recess in which the left end holding member, the right end holding member, the center holding member, and the screen body held by the holding member are accommodated. When the screen main body accommodated in the recess is moved by its own weight, the long side in the sectional view of the left end holding member, the right end holding member and the center holding member is configured to be inclined. The screen device according to claim 2. The left-side end holding member and the right-side end holding member include a plate-like tension holding member that holds the screen body, a tension piece that is bonded and fixed to an end portion of the tension holding member, and an end portion of the tension piece. And a nut that is screwed to the bolt and applies a pulling force to the bolt by a turning operation of the bolt. The screen device according to the item.