JP6639713B2 - Method for supporting membrane member and structure for supporting membrane member - Google Patents

Description

  The present invention relates to a method for supporting a film-like member and a structure for supporting a film-like member. More specifically, the present invention relates to a mechanism for supporting a film-like member suitable for use as a mechanism for supporting, for example, a wire net or a net for protecting a structure or equipment.

  As a conventional net support structure related to protection, for example, as shown in FIG. 18, a cable support pipe band for inserting and fixing to a base pile 102 and a head of the base pile 102 to stretch the net 101 is provided. A corner post 106, a stay post 107, and a peripheral post 108, each of which is composed of an upper post 105 having a hook band 103 or a hook band 104, are erected at predetermined positions. And a net 101 is stretched on the entire peripheral side surface and the top surface via the wire cable 109 (Patent Document 1).

JP-A-9-238582

  The present inventor has studied protection measures using a film-like member such as a protective net for the purpose of protecting structures and equipment from flying objects flying at a high speed. The impact resistance of the candidate material was evaluated by performing a free fall test in which a freely falling weight or the like collides. As a result of the free-fall test, the high-strength wire mesh was found to have excellent impact resistance, but it was found that the impact resistance varied greatly depending on the supporting conditions and the structure and mode of the supporting structure.

  Specifically, high-strength wire mesh is mainly used for slope reinforcement and rock fall protection fences, etc., and wire mesh is attached and supported on support pillars via wire ropes to protect structures and equipment. When the purpose is to attach the wire mesh to the steel structure (steel frame) installed around the structure, etc., the installation method of fixing the wire mesh end to the steel frame with strong bolts etc. In terms of advantages. Therefore, a test body in which a high-strength wire mesh was attached to a net support structure having a rectangular shape in a plan view, which resembled a steel frame structure (steel frame), was manufactured, and a free-fall test in which a free-falling weight collides was performed. The test consisted of a fixed-side fixed specimen in which the short side of the wire mesh was fixed to a steel frame with bolts and the long side supported by a wire rope, and an all-around movable specimen in which the entire circumference of the wire mesh was supported by a wire rope. Was carried out for two types.

  From the test results, it is clear that in the short side fixed type test piece, the wire mesh is not able to deform freely due to the constraint of the end, and the weight penetrates without sufficiently exhibiting the impact resistance of the wire mesh became. Further, the wire rope supporting the long side was broken. On the other hand, in the all-around movable test specimen, the wire mesh is not excessively restrained and can be freely deformed by the deflection of the wire rope, so that the predetermined impact resistance of the wire mesh is exhibited and the penetration of the weight is prevented. It became clear that it would be. It was also found that the wire rope did not break. However, in the all-around movable test specimen, deformation occurs at the corners of the steel frame, which is the attachment part of the wire rope, and this deformation alleviates the sudden increase in tension generated in the wire rope, resulting in brittleness. It is possible that the fracture did not occur.

  Based on these findings, it is possible to sufficiently exhibit the impact resistance of a film-like member such as a wire mesh, and to further suppress deformation of a frame to which the film-like member is attached and a wire for supporting the film-like member. There is a need for a mechanism for supporting a film-like member that can mitigate a sudden increase in tension generated in a linear member such as a rope.

  Therefore, the present invention can sufficiently exhibit the impact resistance of the film-like member, and suppresses the deformation of the frame to which the film-like member is attached, and generates the linear member supporting the film-like member. An object of the present invention is to provide a method for supporting a film-like member and a structure for supporting the film-like member, which can alleviate a sudden increase in tension.

To achieve the above object, the supporting method of the film-like member of the present invention, the linear member supported by winding in contact with the outer periphery of the through the supporting portion to the frame body with a cylindrical support portion Thereby, the periphery of the film-shaped member is supported over the entire circumference.

Further, the support structure for a film-like member of the present invention includes a film-like member, a linear member, and a frame having a cylindrical support portion, and the linear member comes into contact with the outer periphery via the support portion. The film is wound and supported by the frame so that the peripheral edge of the film member is supported by the linear member over the entire circumference.

  Therefore, according to the method for supporting the film-like member and the structure for supporting the film-like member, the entire periphery of the periphery of the film-like member is supported by the linear member. Are sufficiently exhibited, the deformation of the frame body is suppressed, and a sudden increase in the tension generated in the linear member is alleviated.

  In the method for supporting a film-like member and the structure for supporting the film-like member according to the present invention, the support portion of the frame may have a buffer. In this case, since the entire periphery of the film-shaped member is supported by the line-shaped member and the supporting portion supporting the line-shaped member has a buffer, the impact resistance of the film-shaped member is reduced. This is sufficiently exhibited, the deformation of the frame body is further suppressed, and the sudden increase in the tension generated in the linear member is further alleviated.

  Further, the method for supporting a film-like member and the structure for supporting the film-like member according to the present invention may be configured such that the buffer has an outer cylinder constituting an outer peripheral wall and a cushioning member disposed inside the outer cylinder. good. In this case, the cushioning member of the support portion is appropriate because it suppresses the deformation of the frame and alleviates the sudden increase in the tension generated in the linear member.

  Further, the method for supporting a film-like member and the structure for supporting the film-like member of the present invention may be configured such that at least one end of the linear member exerts a resistance while deforming in the direction of pulling with respect to a tensile force, so that the frame is formed on the frame. You may make it attach. In this case, since the entire periphery of the film-shaped member is supported by the line-shaped member, and the line-shaped member is attached to the frame by a mechanism that exhibits resistance while being deformed, The impact resistance performance of the member is sufficiently exhibited, the deformation of the frame body is further suppressed, and the sudden increase in tension generated in the linear member is further alleviated.

  ADVANTAGE OF THE INVENTION According to the support method and support structure of a film-like member of this invention, the impact resistance performance of a film-like member is fully exhibited, the deformation | transformation of a frame is suppressed, and the sharpness of the tension which generate | occur | produces in a linear member is increased. To prevent the rupture of the film-like member and the breakage of the linear member, to reliably protect the object, and to improve the reliability as a protection measure and improve reliability. Becomes possible.

  Further, in the method for supporting a film-like member and the structure for supporting the film-like member of the present invention, the support portion of the frame may have a buffer, and in this case, the impact resistance of the film-like member is sufficient. In addition, the deformation of the frame can be further suppressed, and the sudden increase in the tension generated in the linear member can be further alleviated, so that the rupture of the film member and the rupture of the linear member can be more reliably achieved. Thus, the object can be reliably protected, the reliability as a protection measure can be further improved, and the reliability can be further improved.

  Further, the method for supporting a film-like member and the structure for supporting the film-like member according to the present invention may be configured such that the buffer has an outer cylinder constituting an outer peripheral wall and a cushioning member disposed inside the outer cylinder. Well, in this case, the buffer of the support portion can be made appropriate for suppressing deformation of the frame and alleviating a sudden increase in tension generated in the linear member. It is possible to more reliably prevent the rupture of the membrane member and the rupture of the linear member to protect the target object, and to further improve the reliability as a protection measure, thereby further improving the reliability. Will be possible.

  Further, the method for supporting a film-like member and the structure for supporting the film-like member of the present invention may be configured such that the linear member is attached to the frame by a mechanism that exhibits resistance while being deformed. In this case, In this case, the impact resistance of the film-like member is sufficiently exhibited, the deformation of the frame body is further suppressed, and the sudden increase in the tension generated in the linear member can be further alleviated. The rupture of linear members and the rupture of linear members can be more reliably prevented, and the target can be protected more reliably, and the reliability as a protection measure can be further improved, and the reliability can be further improved. become.

It is a top view which shows an example of embodiment of the support method of the film-like member of this invention, and the support structure of a film-like member, The upper flange of the H-shaped steel which comprises each side of a frame, and each corner of a frame. It is the figure of the state which removed the upper side steel plate (in other words, the state which made the upper flange and the upper side steel plate transparent). It is the front view and longitudinal section of the support structure of the membrane-like member of an embodiment. (A) is a front view. FIG. 2B is a view as seen from the direction of the arrow II in FIG. 1. It is the side view and longitudinal section of the support structure of the membrane member of an embodiment. (A) is a left side view. (B) is a view on arrow II-II of FIG. 1. It is a side view of the corner part of the frame containing the support part of the support structure of the film-like member of the embodiment. It is a top view of a support part of a support structure of a membrane member of an embodiment. It is a mimetic diagram explaining support of a linear member by a support part in a support structure of a membrane member of an embodiment. It is a top view which shows an example of other embodiment of the support method of the film-like member of this invention, and the support structure of a film-like member. It is a top view which shows the example of the other aspect of the aspect of the support method of the film-like member in the support method of the film-like member of this invention, and the support structure of a film-like member. It is a top view which shows the example of the form of still another form of the support method of the film-like member in the support method of the film-like member of this invention, and the support structure of a film-like member. It is a top view which shows the example of the other form of the buffer in the support part in the support method of the film-like member of this invention, and the support structure of a film-like member. It is a figure explaining an example of yet another embodiment of a support method of a membrane member of the present invention, and a support structure of a membrane member, and a concept explaining a vertical arrangement relation between a membrane member and an auxiliary membrane member. FIG. It is a figure explaining an example of still another embodiment of a supporting method of a film member of the present invention, and a supporting structure of a film member, and explains arrangement relation of a film member and an auxiliary film member in the up-and-down direction. It is a conceptual diagram. FIG. 13 is a diagram illustrating an example of a mounting member in the embodiment illustrated in FIGS. 11 and 12. FIG. 3 is a partially enlarged view of a diamond-shaped wire mesh for describing a development direction and a direction perpendicular to the wire mesh. It is a figure explaining the relation between the development direction of a film-like member, and the development direction of an auxiliary film-like member. FIG. 4 is a plan view showing an analysis model of the buffer according to the first embodiment. (A) is a diagram showing an initial state before the start of analysis. (B) is a diagram showing a deformed state at the end of the analysis. FIG. 4 is a diagram illustrating a time history of energy absorbed by the buffer according to the first embodiment. It is a perspective view showing the conventional net support structure.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  1 to 6 show an example of an embodiment of the method for supporting a film-like member and the structure for supporting a film-like member according to the present invention.

  In the method for supporting a film-like member according to the present embodiment, the peripheral portion of the film-like member 1 is supported over the entire periphery by the linear member 2 supported by the frame 3 having the support portion 4 via the support portion 4. I am trying to be.

  Further, the support structure for a film-like member of the present embodiment includes a film-like member 1, a linear member 2, and a frame 3 having a support portion 4, and the linear member 2 is interposed via the support portion 4. The film member 1 is supported by the frame 3, and the peripheral edge of the film-shaped member 1 is supported by the linear member 2 over the entire circumference.

  Furthermore, in the support structure of the film-shaped member of the present embodiment, the support portion 4 has the buffer 6, and specifically, the support portion 4 has the outer diameter holding member 4 a as the outer peripheral wall, The buffer 6 is housed inside the holding member 4a, and the buffer 6 has an outer cylinder 6A constituting an outer peripheral wall and a buffer member 6B disposed inside the outer cylinder 6A.

  The frame 3 is for supporting the film-like member 1, and is protected by the film-like member 1, specifically, for example, the entire structure or a part thereof, various facilities, and the like (hereinafter, referred to as an object to be protected). ) Is provided so as to surround the range that covers).

  The frame 3 is preferably provided as a continuous circuit so as to divide the area covering the protection target into a closed area, but may be partially interrupted. In addition, although it is preferable that the frame 3 is constituted by an independent member as the frame 3, it is also possible to use, as the frame 3, those which originally exist as facilities and facilities related to the protection target.

  The material and the cross-sectional shape of the frame 3 are not limited to specific ones, but may be any as long as they can exhibit the strength normally required as protection equipment for anticipated flying objects and the like. Specifically, for example, an H-section steel, an I-section steel, an angle iron, and a channel steel can be used.

  The shape of the frame 3 in plan view is not limited to a specific shape, but may be an appropriate shape (specifically, for example, various polygons, ellipses, circles, or the like) so as to surround a range covering the protection target. A shape in which a plurality of these are combined) is set. In the present embodiment, the frame 3 is formed such that the shape in a plan view is a rectangle.

  In the present embodiment, specifically, the frame body 3 is formed by a pair of upper and lower steel plates 3a and 3b whose respective sides of the rectangle are formed of H-shaped steel and whose corners 3A of the rectangle are opposed to each other. The shaped steel and the upper and lower steel plates 3a, 3b are formed by welding. FIG. 1 shows a state in which the upper flange of the H-shaped steel constituting each side of the frame 3 and the upper steel plate 3a of each corner 3A of the frame 3 are removed (in other words, the upper flange and the upper steel plate 3a are removed). FIG.

  The film-like member 1 is provided to protect the object to be protected from flying objects and the like, and is supported by the frame body 3 and provided so as to cover the object to be protected.

  The mode and material of the film-like member 1 are not limited to specific ones, but may be any as long as they have a strength normally required as a protection facility for anticipated flying objects and the like. Specifically, for example, a wire mesh made of a metal material such as stainless steel or iron (for example, a rhombus wire mesh (including a high-strength wire mesh or a special rhombus wire mesh), a turtle shell wire mesh, and the like), various synthetic resin fibers, and natural fibers And a fiber net made of the same.

Specifically, in the present embodiment, a galvanized steel wire having a wire diameter (in other words, a diameter of a column wire) of 4.0 mm and a wire strength of 1400 N / mm ² is used as the film-shaped member 1. A three-dimensionally woven rhombus wire mesh having an opening size of mesh (also called mesh size) of 50 mm is used. Further, the film-like member 1 of the present embodiment is formed in a rectangular shape in a plan view slightly smaller than the space surrounded by the webs of the H-shaped steels constituting each side of the frame 3.

Although the above example can be said to be a preferable example, when a wire mesh is used as the film-like member 1, the wire diameter, wire strength, and opening size of the wire mesh are not limited to the above example. It is not intended to be limited to a particular value or range. Specifically, for example, the wire diameter is set to any value within a range of about 3.5 to 4.5 mm as an example. In addition, as an example, a wire strength of about 1000 N / mm ² or more is selected, and a preferable wire strength is about 1200 N / mm ² or more. A range of about 1400 N / mm ² or more is more preferable. Further, as an example, the opening dimension is set to any value in a range of about 35 to 55 mm.

  The linear member 2 is provided between the film member 1 and the frame 3 to support the film member 1 on the frame 3, and is disposed on the peripheral edge of the film member 1. .

  The material of the linear member 2 is not limited to a specific material, but may be any material having a strength generally required as a member for supporting the film member 1 as a facility for protecting against assumed flying objects and the like. Good. Specifically, for example, a wire rope twisted with a hard steel wire, a stainless steel wire, a piano wire, or the like can be used.

  The method of attaching the linear member 2 to the film-like member 1 is not limited to a specific one, and an appropriate member is appropriately selected according to the mode of the film-like member 1 and the like. Specifically, for example, the linear member 2 may be attached by sewing the membrane member 1, or the linear member 2 may be attached using a grip or the like.

  In this embodiment, specifically, a stainless steel rope is used as the linear member 2, and the stainless rope as the linear member 2 stitches the periphery of each side of the film-like member 1 side by side (also referred to as “stitching”). It is attached to the membrane-like member 1 by passing through a wire mesh.

  Both ends of the linear member 2 are attached to the frame 3 by a first fixture and a second fixture, respectively.

  In the present embodiment, a ring 2A is formed at one end of the linear member 2 by aluminum lock processing 2a, and a ring 2B is formed at the other end using a wire grip 10. In FIG. 1, illustration of the wire grip 10 is omitted.

  A shackle 11, 11 serving as a first mounting tool is attached to each of one pair of opposite sides of the two pairs of opposite sides constituting the frame 3, and the other pair of opposite sides is provided. The pipe type turnbuckles 12, 12 as a second mounting tool are mounted on each of the sides. In the present embodiment, the shackles 11 and 11 and the pipe-type turnbuckles 12 and 12 are attached to the upper and lower flanges of the H-shaped steel constituting the frame 3 and the mounting portions fixed to the web, and the outside of the web ( That is, it is attached to the side opposite to the film-like member 1). However, the mounting structure of the shackle 11 and the pipe type turnbuckle 12 is not limited to this.

  Then, one end wheel 2A of the linear member 2 is connected to the shackle 11, and the other end wheel 2B is connected to the pipe-type turnbuckle 12. Thereby, both ends of the linear member 2 are attached to the frame 3.

  Note that the manner of attaching the linear member 2 to the frame 3 is not limited to the above. That is, the formation of the loops 2A and 2B at the ends of the linear member 2 by using the aluminum lock processing 2a and the wire grip 10 is not an essential configuration in the present invention, and the first mounting tool and the second The use of a shackle or a pipe-type turnbuckle as the mounting tool is not essential in the present invention.

  The support portion 4 is for supporting the linear member 2 on the frame 3, in other words, for attaching the film-like member 1 having the linear member 2 attached to the peripheral portion to the frame 3. At the same time, it is for absorbing an impact load such as a flying object acting on the film-like member 1 and the linear member 2.

  In the present embodiment, a total of four support portions 4 are provided, one for each of the four corners 3A of the rectangular frame 3 in plan view.

  The support portion 4 has an outer diameter holding member 4a as an outer peripheral wall, and a fixing bolt 5, a buffer body 6, and a holding plate 7 housed inside the outer diameter holding member 4a. In the present embodiment, the support portion 4 is disposed between the upper steel plate 3a and the lower steel plate 3b that form the corner 3A of the frame 3.

  The outer diameter holding member 4a is for maintaining the unity of the support unit 4 when the support unit 4 is deformed, and is formed in a cylindrical shape.

  The material and plate thickness of the outer diameter holding member 4a are not limited to specific ones, and the outer diameter holding member 4a is deformed by a certain load (specifically, tension assumed to be generated in the linear member 2). A combination of a material and a plate thickness that does not cause breakage is appropriately selected. In the present embodiment, a steel pipe having an appropriate plate thickness is used as the outer diameter holding member 4a.

  The fixing bolt 5 is for fixing the position of the support portion 4 to the frame 3, and is fixed and attached to the upper steel plate 3 a and the lower steel plate 3 b constituting the corner 3 A of the frame 3. Can be In this embodiment, specifically, the pedestal 3c is attached to the upper surface of the lower steel plate 3b by welding, and the three fixing bolts 5 penetrate the upper steel plate 3a and the top plate of the pedestal 3c and are fastened by nuts. And are fixedly attached to the upper and lower steel plates 3a, 3b. The number of fixing bolts 5 is not limited to three, but may be one or two, or four or more.

  The shock absorber 6 absorbs an impact load transmitted by the linear member 2 such as a flying object acting on the film-like member 1 by being deformed in the lateral direction (in other words, being crushed in the lateral direction). It is for doing.

  The buffer body 6 has an outer cylinder 6A constituting an outer peripheral wall, and a buffer member 6B disposed inside the outer cylinder 6A.

  The outer cylinder 6 </ b> A absorbs an impact load by deforming itself, and also maintains the unity of the buffer 6 when the buffer 6 deforms.

  The material and plate thickness of the outer cylinder 6A are not limited to specific ones, but are absorbed by deforming an assumed load (specifically, a tension assumed to be generated in the linear member 2). In this case, a combination of a material and a plate thickness that are appropriate for this purpose is appropriately selected. In the present embodiment, a steel pipe having an appropriate plate thickness determined based on an assumed collision load is used as the outer cylinder 6A.

  The buffer member 6B is for absorbing an impact load by deforming together with the outer cylinder 6A.

  The material of the cushioning member 6B is not limited to a specific material, but is suitable for absorbing an assumed load (specifically, a tension assumed to be generated in the linear member 2) by deforming the same. Is appropriately selected.

  In the present embodiment, a plurality of steel pipes are provided inside the outer cylinder 6A as the buffer member 6B. Specifically, as shown in FIG. 5, seven cushioning members 6B of the same dimensions are arranged in the outer cylinder 6A in such a manner that there is little gap between them and almost no gap with the inner peripheral surface of the outer cylinder 6A. You.

  The shock absorber 6 absorbs the impact load acting on the film-like member 1 transmitted by the linear member 2 by deforming in the lateral direction (in other words, being crushed in the lateral direction) as described above. If possible, the present invention is not limited to a mode in which the support portion 4 is completely accommodated inside the support portion 4, and a part or the whole may be exposed.

  The holding plate 7 is provided between the fixing bolt 5 and the buffer 6, and serves to limit the movement of the buffer 6 in the outer diameter holding member 4 a of the support 4. Specifically, the buffer 6 prevents the fixing bolt 5 from moving from the side opposite to the initially disposed film-like member 1 side to the film-like member 1 side in the outer diameter holding member 4a. Things.

  The material of the pressing plate 7 is not limited to a specific material, but may be used to restrict the movement of the buffer 6 by interposing between the fixing bolt 5 and the buffer 6 when the buffer 6 is deformed. A material having a strength that does not cause large deformation or breakage is appropriately selected. In the present embodiment, a steel plate is used as the holding plate 7.

  The holding plate 7 includes a holding portion 4 on which the holding plate 7 is disposed as a vertex and a bisector of an angle when the supporting portion 4 is connected to the adjacent supporting portions 4 and 4 on both sides. It is preferable that the surface of the plate 7 is disposed in a direction (in other words, an angle) orthogonal to the surface.

  In the present embodiment, since the support portions 4 are provided at each of the four corners 3A of the rectangular frame 3 in a plan view, a certain support portion 4 is set as the apex and the support portion 4 is adjacent to the support portion on both sides. The angle at the time of connecting 4 and 4 is 90 degrees. Therefore, specifically, in the present embodiment, the three fixing bolts 5 are arranged such that the bisector of the angle forming 90 degrees and the horizontal direction (angle) of the three fixing bolts 5 are orthogonal to each other. At the same time, the holding plate 7 is disposed such that the surfaces of the holding plate 7 are orthogonal to each other.

  By adjusting the direction of the surface of the holding plate 7 as described above, the resultant force of the tension generated in the linear members 2, 2 which are bridged from the certain support portion 4 to the adjacent support portions 4 on both sides, respectively, is obtained. The direction is orthogonal to the surface of the holding plate 7, so that when a certain support portion 4 is deformed by the linear member 2, the load acting on the buffer 6 can be applied to the buffer 6 without bias. Become.

  In addition, as a whole of the support portion 4, the holding plate 7 is provided outside the three side-by-side fixing bolts 5 (ie, on the opposite side to the film-like member 1 side), and outside the holding plate 7 (ie, the film-like member). A buffer 6 is disposed on the side opposite to the member 1 and the fixing bolt 5), and an outer diameter holding member 4a is disposed so as to surround the bolt 5, the holding plate 7 and the buffer 6.

  The holding plate 7 of the present embodiment is provided with a pair of opposed vertical plates 7a, 7a on the surface on the fixing bolt 5 side. Then, by inserting these vertical plates 7a, 7a between the fixing bolts 5, the lateral movement of the holding plate 7 with respect to the fixing bolts 5 is restricted. However, the provision of the vertical plate 7a is not an indispensable configuration of the holding plate 7 in the present invention, and the holding plate 7 may be formed as a simple plate-shaped member.

  When only one fixing bolt 5 is provided, it is preferable that the holding plate 7 is fixed to the fixing bolt 5 so that the holding plate 7 does not rotate from the initially provided direction (angle). .

  The arrangement of the holding plate 7 inside the support portion 4 is not an essential configuration in the present invention. That is, for example, when a plurality of fixing bolts 5 are provided in the support portion 4 as in the present embodiment, and the movement of the buffer 6 in the outer diameter holding member 4a is restricted by the plurality of fixing bolts 5, Alternatively, the holding plate 7 may not be provided.

  However, by disposing the holding plate 7, the load acting on the fixing bolt 5 when the buffer body 6 is deformed is dispersed to the plurality of fixing bolts 5, so that the load is concentrated only on the specific fixing bolt. The fixing bolt is prevented from being damaged.

  Subsequently, the support of the linear member 2 by the support portion 4 will be described mainly with reference to FIGS. 1 and 6. Here, for the sake of convenience of the description, for each of the support portions 4 provided one at each of the four corner portions 3A of the rectangular frame 3 in plan view of the present embodiment, the support portion 4 of a certain corner portion 3A 6A, 4B, 4C, and 4D in the clockwise order from the upper left support portion 4 in FIG. In addition, each side of the film-shaped member 1 is referred to as 1A, 1B, 1C, and 1D in the clockwise order from one side between the supporting portions 4A and 4B.

  First, a linear member 2 having one end fixed to one side of a frame 3 along a side 1A of the film-like member 1 by a shackle 11 as a first mounting member is supported along a side 1A of the film-like member 1 by a support portion. 4A, the support member 4A is wound around the support member 4A from the side opposite to the film-like member 1 toward the film-like member 1 (the contact with the outer periphery of the outer diameter holding member 4a is a half turn). The supporting member 4A is separated from the side of the film-shaped member 1 and is passed through the eye of the film-shaped member 1 (wire mesh) so as to stitch the edge of the side 1A of the film-shaped member 1 side by side, and is disposed toward the supporting portion 4B. The support member 4B is wound around the supporting member 4B from the film-like member 1 (side 1A) side to the film-like member 1 (side 1B) side after coming out of the film-like member 1 (the contact with the outer periphery of the outer diameter holding member 4a is three quarters). Circumference), leaving the supporting portion 4B from the film-like member 1 side, passing through the eyes of the film-like member 1 (wire mesh) so as to line up the edges of the side 1B of the film-like member 1 toward the supporting portion 4C. The supporting member 4C is disposed and wound around the supporting portion 4C from the film-like member 1 side to the opposite side of the film-like member 1 side from the film-like member 1 (the contact with the outer periphery of the outer diameter holding member 4a is halved. ), A second attachment to one side of the frame 3 that is disposed along the side 1B of the film-like member 1 away from the support portion 4C from the opposite side of the film-like member 1 and along the side 1B of the film-like member 1 The other end is fixed by a pipe type turnbuckle 12 which is a tool.

  Further, another supporting mechanism in which the above-described supporting mechanism is rotated by 180 degrees around the center of gravity of the film-like member 1 is combined. That is, the linear member 2, one end of which is fixed to one side of the frame 3 along the side 1 </ b> C of the film-like member 1 by the shackle 11, which is a first attachment, is supported along the side 1 </ b> C of the film-like member 1. 4C, the support member 4C is wound around the support member 4C from the side opposite to the membrane member 1 toward the membrane member 1 (the contact with the outer periphery of the outer diameter holding member 4a is a half turn). The support member 4C is separated from the side of the film-like member 1 and is passed through the eyes of the film-like member 1 (wire mesh) so as to line up the edge of the side 1C of the film-like member 1 so as to face the support portion 4D. The support member 4D is wound around the support member 4D from the film member 1 (side 1C) side to the film member 1 (side 1D) side after coming out of the film member 1 (contact with the outer periphery of the outer diameter holding member 4a is three quarters). Circumference), leaving the support portion 4D from the film-like member 1 side, passing through the eyes of the film-like member 1 (wire mesh) so as to stitch the edges of the side 1D of the film-like member 1 side by side, and to the support portion 4A. And is wound around the support portion 4A from the film-like member 1 side to the side opposite to the film-like member 1 side (contact with the outer periphery of the outer diameter holding member 4a is reduced to two minutes). One round), the supporting member 4A is separated from the opposite side of the film-like member 1 along the side 1D of the film-like member 1 and the second side is formed on one side of the frame 3 along the side 1D of the film-like member 1. The other end is fixed by a pipe-type turnbuckle 12 which is a mounting tool of (1).

  By the combination of the two support mechanisms described above, the two linear members 2 are supported by the frame 3 via the support portions 4, and the two linear members 2 extend the sides 1 </ b> A and 1 </ b> B. , 1C, 1D (that is, the entire periphery of the peripheral portion of the film-like member 1) is supported, so that the film-like member 1 is supported by the frame 3 via the support portion 4.

  Also, by supporting the linear member 2 by the support portion 4 as shown in FIGS. 1 and 6, the H-shaped steel web constituting each side of the frame body 3 on the film-like member 1 side A linear member 2 for supporting the film-like member 1 is disposed on the other side, and shackles 11, 11 as first fittings and a pipe-type turn as a second fitting on the side opposite to the film-like member 1 side. A configuration in which the buckles 12, 12 are disposed and the linear member 2 is wound around the support portion 4 is realized.

  As described above, the support portion 4 has the structure having the buffer body 6 and the film member 1 is supported by the linear member 2 supported by the support portion 4, so that a flying object collides with the film member 1. It is possible to exhibit a reliable protection function as protection equipment such as, for example, the whole or part of the structure or various equipment without being destroyed by the impact load at the time.

  Specifically, when a flying object collides with the membrane member 1, an impact load is transmitted from the membrane member 1 to the linear member 2, and tension is applied to each of the linear members 2 between the support portions 4. appear. Then, the impact load transmitted from the film-like member 1 to the linear member 2 is concentrated on the corner 3A of the frame 3, specifically, on the support 4 provided on the corner 3A. Then, a load that tries to crush the support portion 4 laterally acts on the support portion 4 around which the linear member 2 is wound.

  At this time, depending on the arrangement of the linear member 2 and the manner of winding the linear member 2 around the support portion 4 as described above, the support portion moves from the side opposite to the film member 1 toward the film member 1 side. A load that crushes the support member 4 in the lateral direction, specifically, a resultant force of the tension generated in the linear members 2 on both sides of the support portion 4 acts on the support portion 4.

  A buffer 6 is disposed outside the fixing bolt 5 and the holding plate 7 (that is, on the side opposite to the film-like member 1), and the outer cylinder 6A and the buffer member that constitute the buffer 6 together with the outer diameter holding member 4a. By compressing and deforming 6B, an impact load such as a flying object acting on the film-like member 1 is absorbed.

  According to the method for supporting a film-like member and the structure for supporting a film-like member of the present invention configured as described above, the impact resistance of the film-like member 1 can be sufficiently exerted. To prevent deformation of the frame member 3 on which the wire member 1 is mounted and to alleviate a sharp increase in tension generated in the wire member 2 supporting the film member 1 to prevent brittle breakage of the wire member 2. Can be.

  Although the above-described embodiment is an example of a preferred embodiment for carrying out the present invention, the embodiment of the present invention is not limited to the above-described embodiment, and the present invention may be implemented without departing from the scope of the present invention. Can be variously modified. For example, in the above-described embodiment, all the support portions 4 have the buffer 6, but it is not an essential configuration in the present invention that all the support portions 4 have the buffer 6. That is, some support portions 4 may not include the buffer 6 or all support portions 4 may not include the buffer 6 (note that the support portion 4 includes the buffer 6). If not, the holding plate 7 is unnecessary). At this time, the support portion 4 without the buffer 6 may be in a form on the assumption that the outer diameter holding member 4a is formed in a cylindrical shape and deforms itself as in the above-described embodiment, for example. The form which does not assume that it is deformed may be used. In the case where the supporting portion 4 does not have the buffer body 6 but is assumed to be deformed by itself, the combination of the material and the plate thickness of the outer diameter holding member 4a is appropriately adjusted, so that When the diameter holding member 4a is deformed by compression, an impact load such as a flying object acting on the film-shaped member 1 is absorbed. On the other hand, even if the supporting portion 4 does not have the buffer body 6 and does not assume that the supporting member 4 is deformed, the entire circumference of the movable test specimen supported by the wire rope and carried out by the inventor of the present invention. According to the results of the free drop test in which the weight is used to collide with the weight, the wire mesh is not excessively restrained and can be freely deformed by the deflection of the wire rope. It is clear that the penetration of the weight is prevented and the breakage of the wire rope is prevented. In other words, even when all the support portions 4 do not have the buffer 6, a certain effect is exerted as long as the entire periphery of the film member 1 is supported by the linear member 2. In this case, the support portion 4 functions to change the direction of the linear member 2 according to the shape of the frame 3 and is provided at an appropriate position on the frame 3 as appropriate.

  Further, in the above-described embodiment, two linear members 2 are used so that one film-like member 1 is supported by the frame 3. However, the number of film-like members 1 is limited to one. Instead, two or more film-like members 1 in which the back surface and the front surface of each member face each other in the vertical direction may be supported by one frame 3. When two film-like members 1 arranged vertically facing each other are supported, for example, as shown in FIG. 7, it is considered that the support mechanism in the above-described embodiment is turned upside down and overlapped. Can be With the configuration shown in FIG. 7, it is possible to eliminate the bias of the winding of the linear member 2 around each support portion 4 and to appropriately disperse the collision load, and at the same time, the first mounting member (shackle 11) and The second fitting (pipe-type turnbuckle 12) can be properly fitted and attached to the frame 3. In FIG. 7, the illustration of the wire grip 10 is omitted.

  In addition, it is a matter of course that the frame members 3 supporting one or more film-like members 1 are stacked in a plurality of stages, whereby a plurality of the film-like members 1 are arranged and arranged.

  Further, in the above-described embodiment, each side 1A, 1B, 1C, 1D of the film-like member 1 is supported by the two linear members 2, that is, the periphery of the film-like member 1 extends over the entire circumference. Although supported, the manner of supporting the entire periphery of the film-like member 1 is not limited to this. Specifically, for example, as shown in FIG. 8, the periphery of the film-like member 1 may be supported over the entire circumference by one linear member 2, or as shown in FIG. The periphery of the film-like member 1 may be supported over the entire periphery by the four linear members 2.

  Further, in the above-described embodiment, as described with reference to FIGS. 1 and 6, the contact between the outer circumference of the outer diameter holding member 4 a and the support 4 </ b> A and the support 4 </ b> C is ２. The linear member 2 is wound around the support portion 4B and the support portion 4D such that the contact with the outer periphery of the outer diameter holding member 4a is 3/4 of the circumference. However, the manner in which the linear member 2 is wound around the support portion 4 is not limited to the above-described embodiment. Specifically, for example, it may be simply arranged on the opposite side of the support member 4 from the film-like member 1 side (the contact with the outer periphery of the outer diameter holding member 4a is a quarter turn).

  In the above-described embodiment, the linear member 2 is attached to the frame 3 by using the shackles 11, 11 as the first attachment and the pipe-type turnbuckles 12, 12 as the second attachment. However, the manner of attaching the linear member 2 to the frame 3 is not limited to this, and at least one end of the linear member 2 deforms in the direction of pulling with respect to the pulling force while reducing the resistance. It may be attached to the frame 3 by a mechanism that exerts (in other words, generates resistance while transforming in the direction of tension and converts and absorbs tensile energy) (in other words, with a mechanism interposed). . In this case, particularly, the support portion 4 may not have the buffer 6. That is, by using a mechanism that exerts a resistance while deforming in the direction of pulling with respect to the pulling force, a sudden increase in the tension generated in the linear member can be reduced. Specific examples of the mechanism that exerts a resistance while deforming in the direction of tension with respect to the tensile force include, for example, a tension coil spring and an oil damper.

  Further, in the above-described embodiment, the buffer 6 in the support portion 4 is constituted by the outer cylinder 6A and the buffer member 6B in the outer cylinder 6A. The invention is not limited to the above-described embodiment as long as it can absorb an impact load by being deformed into (in other words, crushed in the lateral direction). Specifically, for example, as shown in FIG. 10A, a plurality of tubular buffer members 6B are provided without providing the outer cylinder 6A, or as shown in FIG. 6C may be arranged concentrically so as to form a multilayer. Note that a steel pipe may be used as the buffer member 6B or the tubular member 6C in these cases. However, the configuration of the buffer body 6 in the above-described embodiment is as follows: 1) a gap is provided to allow the deformation of the buffer member 6B; 2) the rigidity is reduced when the buffer member 6B is compressed and deformed; However, as the deformation progresses, the time during which the buffer member 6B absorbs energy is lengthened. 3) Disturbance in the initial arrangement position of the buffer member 6B during actual installation (assembly) is reduced, and after the installation, This is preferable in that the quality of the buffering effect is ensured by limiting the variation of the buffering member 6B during deformation.

  Further, in the above-described embodiment, the buffer 6 in the support portion 4 is configured by a tubular member (specifically, a steel pipe). However, the buffer 6 itself deforms in the lateral direction (in other words, It is not limited to the above-described embodiment as long as the impact load can be absorbed by being crushed in the lateral direction). Specifically, for example, a member having a honeycomb structure is used in a horizontal cross section, or a resistance is exerted while deforming in the direction of compression with respect to a compressive force (in other words, a resistance is generated while deforming in the direction of compression. A mechanism that generates and converts and absorbs compression energy) may be used. Specific examples of a mechanism that exerts a resistance force while deforming in the direction of compression with respect to the compression force include a compression coil spring and an oil damper.

  The method for supporting a film-like member and the structure for supporting the film-like member according to the present invention include an auxiliary film-like member on the upper surface side (in other words, the front side) and the lower surface side (in other words, the back side) of the film-like member 1. May be further provided. Specifically, for example, when one film-like member 1 is supported by the frame 3 as shown in FIGS. 1 to 6, the auxiliary film-like member 13 is placed on the upper surface side of the film-like member 1. It is disposed (see FIG. 11A), disposed on the lower surface side of the film-like member 1 (see FIG. 11B), or disposed on the upper surface side and the lower surface side of the film-like member 1 respectively. (See FIG. 11C). It should be noted that two or more auxiliary film-like members 13 may be arranged in an overlapping manner.

  Here, FIG. 11 is a conceptual diagram for explaining an example of an arrangement relationship between the film-like member 1 and the auxiliary film-like member 13 in the vertical direction, and the structures and dimensions (including mutual arrangement intervals) are strict. In addition, illustration of components other than the film-like member 1 and the auxiliary film-like member 13 is omitted. Further, in FIG. 11, the film-like member 1 is shown by a dashed line only in consideration of the clarity of distinction from the auxiliary film-like member 13 and has no other meaning.

For example, when two film-like members 1 in which the back surface and the front surface of each member are vertically opposed to each other as shown in FIG. The member 13 may be disposed at any position of the upper surface side and the lower surface side of the upper film-like member 1 _{up and} the upper surface side and the lower surface side of the lower film-like member 1 _lo . Also, one or a plurality of sheets may be provided. Specifically, for example, the auxiliary film-shaped member 13 is disposed on the upper surface of the upper film-shaped member 1 _up (see FIG. 12A), or disposed on the upper surface of the lower film-shaped member 1 _lo. 12 (B)), disposed on the lower surface side of the lower film-like member _1lo (see FIG. 12 (C)), or on the upper surface side of the upper film-like member 1 _up. It is disposed on the upper surface side of the lower film-like member 1 _lo (see FIG. _12D ), or the upper surface side of the lower film-like member 1 _{lo and} the lower surface side of the lower film-like member 1 _lo . , Or on the upper surface of the upper film-like member 1 _up and on the lower surface of the lower film-like member 1 _lo , respectively, and further, on the upper surface of the upper film-like member 1 _up it may be or is disposed in each of the lower surface side of the film member 1 _lo of top side, and the lower film member 1 _lo lower. Note that two or more auxiliary film-like members 13 may be arranged so as to be stacked.

  Here, FIG. 12 is a conceptual diagram for explaining an example of an arrangement relationship between the film-like member 1 and the auxiliary film-like member 13 in the vertical direction, and the structures and dimensions (including mutual arrangement intervals) are strict. In addition, illustration of components other than the film-like member 1 and the auxiliary film-like member 13 is omitted. Further, the film-like member 1 is shown by a dashed line in FIG. 12 merely in consideration of the clarity of distinction from the auxiliary film-like member 13 and has no other meaning.

As the auxiliary film-like member 13, a material having the same form and material as the film-like member 1 (including the film-like members 1 _up and 1 _lo ) may be used, or a material having a different form and material may be used. Is also good. For example, a wire net made of a metal material such as stainless steel or iron, or a fiber net made of various synthetic resin fibers or natural fibers may be used.

More specifically, for example, similarly to the example of the film-like member 1 in the above-described embodiment, the wire diameter is about 3.5 to 4.5 mm and the wire strength is about 1000 N / mm ² or more ( In addition, about 1200 N / mm ² or more is preferable, and about 1400 N / mm ² or more is more preferable.) A galvanized steel wire is three-dimensionally woven with an opening size of about 35 to 55 mm. A diamond-shaped wire mesh may be used.

  The auxiliary film-shaped member 13 is formed in a shape and a size that cover the whole or substantially the whole of the film-shaped member 1 in a plan view, that is, in the same or substantially the same shape and size as the film-shaped member 1 in a plan view, or , Are formed larger than the film-like member 1 in a plan view.

  When the auxiliary film-shaped member 13 is disposed on the upper surface side or the lower surface side of the film-shaped member 1, the peripheral portion of the auxiliary film-shaped member 13 or a portion around the peripheral portion (in other words, a little more than the peripheral edge portion) (Inner part), the film-like member 1 is attached to the linear member 2 supporting the peripheral edge portion by the attachment member 14.

  The mounting member 14 is so strong that the auxiliary film-like member 13 is attached to the linear member 2 by exhibiting a rigidity that does not come off when an impact load due to a collision of a flying object or the like is applied. It does not matter.

  As the attachment member 14, for example, a spirally wound coil (also referred to as a coupling coil), a binding / binding ring, a binding tool, or the like can be used.

  For example, when the film-like member 1 is a wire mesh and the wire-like member 2 is a rope, and the wire-like member 2 is passed through the mesh of the wire mesh so as to stitch the periphery of each side of the film-like member 1 side by side. When the auxiliary film-like member 13 is also a wire mesh and a spiral coil is used as the attachment member 14, specifically, as shown in FIG. 13, for example, one end 14a of the spiral coil 14 is linear. The spiral coil 14 is inserted into the mesh of the membrane member 1 at the inner position (position 1e) of the member 2 and the outer periphery of the linear member 2 is spirally rotated by the axial rotation of the spiral coil 14. (In other words, so that the linear member 2 is taken into the hollow shaft portion of the spiral coil 14) when the spiral coil 14 advances while sewing the wire mesh. The auxiliary film-like member 13 provided on the upper surface side of the Spelling, by involving in other words, the auxiliary film-like member 13 is attached to the linear member 2 by the helical coil 14. Although FIG. 13 shows an example in which the auxiliary film-like member 13 is provided on the upper surface side of the film-like member 1, the auxiliary film-like member 13 is provided on the lower surface side of the film-like member 1. In this case, the same attachment is possible when the auxiliary film-like member 13 is provided on each of the upper surface side and the lower surface side of the film-like member 1.

  Here, FIG. 13 is a conceptual diagram for explaining an example of how to attach the auxiliary film-like member 13, and the structure of the film-like member 1, the linear member 2, the auxiliary film-like member 13, and the spiral coil 14. And dimensions are not exact. Specifically, for example, the meshes of the film-like member 1 and the auxiliary film-like member 13 are not shown for simplicity, and the mutual arrangement interval is not strict. The illustration of the configuration other than the above members is omitted. Further, in FIG. 13, the film-like member 1 is shown by a dashed-dotted line merely in consideration of the clarity of distinction from other members, and has no other meaning.

  Alternatively, in the case where the film-like member 1 and the linear member 2 have the above-described configuration, the auxiliary film-like member 13 is also a wire mesh, and the attachment member 14 is a binding / joining ring, specifically, for example, a screw connection made of stainless steel. In the case where a wire ring is used, the connection portion of the wire ring arranged annularly around the linear member 2 while penetrating the mesh between the film member 1 and the auxiliary film member 13 is screwed. Thereby, the auxiliary film-like member 13 is attached to the linear member 2 by a wire ring.

  Alternatively, in the case where the film-like member 1 and the linear member 2 have the above-described configuration, the auxiliary film-like member 13 is also a wire mesh, and a binding tool, specifically, for example, a binding wire or a binding band is used as the attachment member 14. In this case, the binding film or the binding band wound around the linear member 2 while passing through the mesh between the film member 1 and the auxiliary film member 13 is tightened, so that the auxiliary film member 13 is bound. It is attached to the linear member 2 by a wire or a binding band.

  Here, when the auxiliary film-like member 13 is attached to the linear member 2, the entire periphery of the peripheral edge of the auxiliary film-like member 13 may be attached to the linear member 2 without any gap, or May be attached to the linear member 2. And a plurality of attachment members 14 may be used as needed. However, it is preferable that the auxiliary film-shaped member 13 is attached to the linear member 2 in four directions in plan view, as in each of the four sides when the auxiliary film-shaped member 13 is quadrangular.

  In addition, when the auxiliary film-like member 13 is mounted on the upper surface of the film-like member 1 by attaching the auxiliary film-like member 13 in the above-described manner, especially when the auxiliary film-like member 13 is provided on the upper surface of the film-like member 1, Although it is conceivable that the auxiliary film-shaped member 13 is disposed while naturally contacting the film member 1, the auxiliary film-shaped member 13 may be in contact with the upper surface (in other words, the front surface) or the lower surface (in other words, the back surface) of the film-shaped member 1. It is not an essential condition in the present invention. Further, the auxiliary film-shaped member 13 may be provided in a state where it is separated from the film-shaped member 1 (that is, in a state where a predetermined gap is provided between both surfaces).

  Here, the wire netting is an anisotropic material having different load sharing (in other words, energy absorption performance) depending on the direction (direction) of braiding. For example, in a wire mesh such as a diamond wire mesh partially shown in FIG. 14, when the column line 15 arranged in the left and right direction in the drawing is pulled out by an impact due to a collision of a flying object or the like, the drawn row The location of the line 15 becomes a line-shaped tear, and the wire mesh is torn, so that the energy absorbing performance cannot be exhibited.

  For this reason, when a wire mesh is used as the film-like member 1 and the auxiliary film-like member 13, the film-like member 1 and the auxiliary film-like member 13 are arranged such that the weaving directions of the wire meshes are different from each other. It is possible to exhibit both the energy absorption performance and the local penetration prevention performance when an impact load due to the collision of a flying object or the like is applied.

  Regarding the weaving direction, in the diamond-shaped wire mesh partially shown in FIG. 14, the direction in which the column line 15 that is bent in a sawtooth shape and engages with the adjacent one is arranged (in other words, the axial direction / longitudinal direction of the column line 15). 14 is referred to as a direction perpendicular to the direction of development (the direction indicated by the arrow Od in the figure), and is a direction orthogonal to the direction in which the column lines 15 are arranged (that is, the direction in FIG. 14). The vertical direction) is referred to as a developing direction (the direction of the arrow indicated by the symbol Dd in the figure). The concept of the development direction (arrow Dd) and the direction perpendicular to the development (arrow Od) is the same for the wire net.

  Then, the film-like member 1 provided to be stretched so as to cover the protection target (in other words, a range covered by the film-like member 1 for protecting the protection target) is, for example, rectangular or elliptical in plan view. When the dimensions in the two orthogonal directions are different, the film-like member 1 is formed and arranged so that the development direction of the wire mesh is in the longitudinal direction, so that the film-like member 1 can exhibit good energy absorption performance. .

  On the other hand, since the auxiliary film-like member 13 is formed and arranged so that the direction of development of the wire mesh is perpendicular to the direction of development of the film-like member 1, good penetration prevention performance is exhibited by the auxiliary film-like member 13. obtain.

  That is, the film member supporting method and the film member supporting structure of the present invention, for example, taking the form shown in FIG. 1 as an example, the longitudinal direction of the film member 1 in plan view is the vertical direction in the figure. Good energy absorption performance can be exhibited by forming and arranging the film-like member 1 so that the development direction of the wire mesh is the vertical direction in the figure. In the method for supporting a film-like member and the structure for supporting a film-like member according to the present invention, for example, taking the form shown in FIG. 7 as an example, a back surface and a front surface of each member are vertically opposed to each other. Since the longitudinal direction of the two film-like members 1 in plan view is the vertical direction in the figure, both of the two film-like members 1 are formed and arranged so that the development direction of the wire mesh is the vertical direction in the figure. Thereby, better energy absorption performance can be exhibited. That is, when one or two or more film members 1 are arranged vertically facing each other, all the film members 1 are formed and arranged so that the development direction of the wire mesh is the longitudinal direction. Thereby, good energy absorption performance can be exhibited. Therefore, this embodiment can exert a reliable protection function, especially when the assumed flying object is, for example, a sphere and it is not necessary to attach importance to preventing the penetration of the wire mesh by the flying object. It is.

  The method for supporting a film-like member and the structure for supporting the film-like member according to the present invention include, in addition to the film-like member 1 formed and arranged so that the development direction of the wire mesh is the longitudinal direction, the development direction of the wire mesh By forming and arranging the auxiliary film-like member 13 so as to be in a direction orthogonal to the developing direction of the shape-like member 1, good penetration prevention performance can be exhibited in addition to good energy absorption performance. Therefore, in this embodiment, even when an assumed flying object or the like is, for example, a pillar, and it is necessary to attach importance to prevention of penetration of the wire mesh by the flying object or the like, a reliable protection function can be exhibited. It is possible.

  Here, when the film member 1 and the auxiliary film member 13 are used in combination, the development direction of the wire mesh is adjusted as described above, and the auxiliary film member is provided on the upper surface side of the film member 1. 13 are preferably provided.

Therefore, an example of a preferable configuration in the case where the film-like member 1 and the auxiliary film-like member 13 are used in combination is, for example, one film-like member 1 is used as shown in FIG. In this case, the wire mesh is formed such that the wire mesh development direction (the direction of the arrow Dd in the figure) extends along the longitudinal direction (the direction of the arrow Ld in the figure) of the range covered to protect the protection target. An auxiliary film formed on the upper surface side of one of the film members 1 arranged and arranged so that the development direction (arrow Dd) of the wire mesh is along the direction perpendicular to the development direction (arrow Dd) of the film member 1. Preferably, a member 13 is provided. In addition, as shown in FIG. 15B, in the case where two film-like members 1 are used in which the back surface and the front surface of each member are arranged facing each other in the vertical direction, in order to protect an object to be protected. range longitudinal development direction of the wire mesh (arrow Ld) (arrow Dd) of the upper and lower two are formed is disposed along the film-like member 1 _{Stay up-,} 1 of the upper of the _lo film member 1 _{Stay up-of} covering on the upper surface side, the film-shaped member 1 _{Stay up-,} 1 _lo auxiliary film-like member 13 the deployment direction of the wire mesh (arrow Dd) are formed along a direction perpendicular to the deployment direction (arrow Dd) of is disposed Is preferred.

Here, FIG. 15 is a conceptual diagram for explaining the relationship between the developing directions of the film members 1, 1 _up and 1 _{lo and} the developing direction of the auxiliary film member 13, and each structure and dimensions (mutual arrangement) are shown. (Including the interval) is not strict, and the illustration of the configuration other than the film members 1, 1 _up and 1 _lo and the auxiliary film member 13 is omitted.

  Embodiments in which the method for supporting a film-like member of the present invention and the energy absorbing performance of the buffer 6 in the structure for supporting the film-like member are verified will be described with reference to FIGS. 16 and 17.

  The buffer 6 serves to suppress the deformation of the frame 3 and to alleviate a sudden increase in the tension generated in the linear member 2. The buffer 6 has a deformation performance (energy absorption) that progresses slowly and for a long time. Performance) is required.

  Therefore, here, by using a finite element method, numerical analysis using the finite element method was used to verify the ability of the buffer body 6 to exhibit a gradual and long-lasting deformation performance (energy absorption performance).

  In the verification, the acting load when the assumed flying object collides with the membrane member 1 is identified, the tension generated in the linear member 2 is identified, and the energy absorption performance of the buffer 6 is determined using the identified tension. Was analyzed. In the present embodiment, the applied load was identified by numerical analysis based on the measurement results of a free fall test performed by actually colliding a weight or the like, and the tension generated in the linear member 2 was identified. As a result of the numerical analysis, specifically, a load at which the maximum applied load occurs approximately 0.05 seconds after the collision of the flying object was identified, and the identified load was used as an input load for verification.

  Then, numerical analysis using the finite element method was performed using the analysis model of the buffer 6 shown in FIG. The analysis model of the buffer 6 shown in FIG. 16A has the same configuration as the configuration of the buffer 6 shown in FIG. 5 except for the number of the fixing bolts 5 and the presence or absence of the vertical plate 7a of the holding plate 7, The outer diameter holding member 4a of the support 4 and the outer cylinder 6A and the buffering member 6B of the buffer 6 were all cylindrical steel pipes, and the holding plate 7 was a steel plate.

  By the numerical analysis, the result shown in FIG. 16B was obtained as a deformation diagram of the analysis model at the end of the analysis, and the result shown in FIG. 17 was obtained as the time history of the absorbed energy. FIG. 17 specifically shows the transition of the amount of absorbed energy of the buffer structure having a height of 10 mm.

  From the results shown in FIG. 16 (B), the outer diameter holding member 4a which receives the load moves forward (that is, toward the film-like member 1), and compresses and deforms the internal cushioning member 6B together with the outer cylinder 6A. It was confirmed that energy was absorbed.

  The cushioning member 6B is configured by combining cylindrical steel pipes. The cylindrical steel pipe which receives a compressive load shows a strong resistance force due to an arch effect in an initial stage, but has a rigidity when deformation proceeds and internal deformation occurs. It was confirmed that the deformation of the steel pipe progressed even if the applied load decreased.

  Further, by appropriately setting the thickness of the steel pipe as the buffer member 6B with respect to the magnitude of the acting load, the absorbed energy is gradually increased, and the deformation of the steel pipe is generated inside at the time of final deformation. It was confirmed that it was possible.

  Then, when the plate thickness of the steel pipe as the buffer member 6B is appropriately set, as shown in FIG. 17, while the input load decreases after 0.05 seconds, the absorbed energy becomes 0.06 seconds. It was confirmed that the structure of the buffer 6 of the present invention can exhibit excellent buffer performance.

  According to the verification in the present embodiment, by incorporating the buffer 6 having the structure shown in FIGS. 5 and 16 into the support structure of the membrane member 1, the tension generated in the linear member 2 supporting the membrane member 1 is reduced. It was confirmed that the increase was alleviated and the deformation of the frame supporting the film-like member was also suppressed. In the example shown in FIG. 5, seven cushioning members 6B of the same size are arranged in the outer cylinder 6A in such a manner that there is almost no gap between them and there is almost no gap with the inner peripheral surface of the outer cylinder 6A (in other words, almost in contact). However, seven cushioning members 6B of the same dimensions may be arranged so as to completely contact each other and completely contact the inner peripheral surface of the outer cylinder 6A.

DESCRIPTION OF SYMBOLS 1 Film-like member 2 Linear member 3 Frame 4 Support part

Claims (14)

The peripheral portion of the film-shaped member is supported over the entire periphery by a linear member that is wound and supported on a frame having a cylindrical support portion while being in contact with the outer periphery of the support portion via the support portion. A method for supporting a film-like member, characterized by comprising:   2. The method according to claim 1, wherein the support section has a buffer.   3. The method according to claim 2, wherein the buffer has an outer cylinder forming an outer peripheral wall and a buffer member disposed inside the outer cylinder.   2. The method according to claim 1, wherein at least one end of the linear member is attached to the frame by a mechanism that exhibits resistance while being deformed in the direction of tension with respect to tensile force. 3. .   The film according to claim 1, wherein an auxiliary film-like member is provided on at least one of an upper surface side and a lower surface side of the film-like member, and the auxiliary film-like member is attached to the linear member. Method of supporting a shaped member.   A wire mesh is used as the film-like member and the auxiliary film-like member, and a wire mesh as the film-like member is formed and arranged so that a development direction of the wire mesh is a longitudinal direction. The method for supporting a film-like member according to claim 5, wherein a wire mesh as the auxiliary film-like member is formed and arranged so as to be orthogonal to a developing direction of the wire mesh as a member.   Two sets of the frame body, the linear member, and the film member provided with the support portion are used, and the two film members are arranged vertically facing each other and the two film members An auxiliary film-like member is disposed on the upper surface side of the upper film-like member of the members, and the auxiliary film-like member is attached to the linear member, and as the two film members and the auxiliary film-like member, A wire mesh is used, and both of the two wire meshes as the two film-like members are formed and arranged so that the direction of deployment of the wire mesh is the longitudinal direction, and the direction of deployment of the wire mesh is the two membranes. 2. The method of supporting a film-like member according to claim 1, wherein a wire mesh as the auxiliary film-like member is formed and arranged to be orthogonal to a developing direction of the two wire meshes as the film-like members. A frame having a film- shaped member, a linear member, and a cylindrical supporting portion, wherein the linear member is wound around the outer periphery of the supporting portion by contact with the outer periphery of the supporting portion and supported by the frame; A supporting structure for the film-like member, wherein a peripheral portion of the film-like member is supported by the linear member over the entire circumference.   9. The support structure for a film-like member according to claim 8, wherein said support portion has a buffer.   10. The support structure for a film-like member according to claim 9, wherein the buffer has an outer cylinder constituting an outer peripheral wall and a buffer member disposed inside the outer cylinder.   9. The support structure for a film-like member according to claim 8, wherein at least one end of the linear member is attached to the frame by a mechanism that exhibits resistance while being deformed in the direction of tension with respect to tensile force. .   9. The film-like member according to claim 8, further comprising an auxiliary film-like member provided on at least one of an upper surface side and a lower surface side of the film-like member and attached to the linear member. Support structure.   The film-like member and the auxiliary film-like member are wire meshes, and a wire mesh as the film-like member is formed and arranged so that the direction of deployment of the wire mesh is a longitudinal direction, and the direction of deployment of the wire mesh is the film-like member. 13. The support structure for a film-like member according to claim 12, wherein a wire mesh as the auxiliary film-like member is formed and arranged to be orthogonal to a developing direction of the wire mesh.   It has two sets of the combination of the film-like member, the linear member, and the frame provided with the support portion, and the two film-like members are arranged vertically facing each other, and the two film-like members are arranged. It further has an auxiliary film-like member provided on the upper surface side of the upper film-like member of the members and attached to the linear member, wherein the two film-like members and the auxiliary film-like member are wire meshes. Both the two wire meshes as the two film-like members are formed and arranged so that the wire mesh development direction is the longitudinal direction, and the wire mesh development direction is the two film-like members. 9. The support structure for a film-like member according to claim 8, wherein a wire net as the auxiliary film-like member is formed and arranged so as to be orthogonal to a development direction of the two wire nets.