JP2016125234A - Flying object preventive facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To preferably protect an object to be protected.SOLUTION: A flying object preventive facility 10 protects a top face of an object to be protected against a flying object. The flying object preventive facility 10 comprises: multiple column parts 20, which are columnar members disposed around the object to be protected; a connection part 22, which is directly or indirectly supported by the column part 20 and circles above the object to be protected; a net part 30, which is installed along an inner periphery of the connection part 22, covers the top face of the object to be protected and looses downward in a vertical direction; a rope part 40 with one end fixed to a first fixing part of the connection part that is a predetermined position of the connection part 22 and the other end fixed to the second fixing part of the connection part that is the other predetermined position of the connection part 22 and faces opposite to the first fixing part of the connection part, which can be installed so as to be tense from one end to the other end; and a connection part, which connects the net part 30 and the rope part 40.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a flying object protection facility that suppresses a flying object from reaching a protection object.

  A nuclear facility has a mechanism to ensure the safety of the facility. For example, in order to protect equipment in a nuclear facility from flying objects, it has been proposed that a frame is provided around the protection target device and a net is attached to the frame to cover the protection target device with a steel wire net. Steel wire nets are used in equipment that protects rocks from slopes, for example, as disclosed in Patent Document 1.

JP 2013-2117020 A

  Here, as a flying object, there is an object flying toward the equipment to be protected due to a gust or strong wind. If such a flying object collides with the protection target device, it may cause damage or failure. In Japan, as defined in Article 6 of the “Rules for the Location, Structure, and Equipment Standards for Practical Power Reactors and Their Attached Facilities” established by the Nuclear Regulatory Commission, safety facilities are It is stipulated that the safety function should not be impaired even in the event of an assumed natural phenomenon. One of the natural phenomena assumed based on the natural environment around this site is the effect of tornado. For this reason, it is required to have a design that does not impair the safety of the reactor facility due to tornadoes and accompanying events as natural phenomena that cause gusts and strong winds that occur very rarely during the operation period of the reactor facility. ing. Specifically, based on the “Turnado Impact Assessment Guide for Nuclear Power Plants”, design tornadoes and design loads (design tornado loads and other combined loads) are set, surveys on flying objects at the power station, flying objects Take preventive measures, evaluate the structural integrity of the tornado protection facility against the design load to be considered, and take measures corresponding to the results to maintain the safety function.

  Here, since the devices to be protected by the nuclear facilities are generally huge, the protective net is also large. Therefore, the protective net installed on the upper surface of the protection target equipment of the nuclear facility may be loosened by its own weight. If the slack of the net increases, the clearance between the net and the device to be protected decreases, and flying objects may collide with the device to be protected via the net, making it impossible to properly protect the device to be protected. . In order to reduce the clearance between the net and the device to be protected, the height of the frame may be increased, but in this case, the seismic strength of the frame may be reduced. In addition, it is conceivable to install the net by applying an initial tension to the net so that the net does not loosen, but since the net weight is large, there is a possibility that a large load is applied to the frame that supports the net.

  This invention solves the subject mentioned above, and aims at providing the flying object protection equipment which can protect a protection target suitably.

  In order to solve the above-described problems and achieve the object, the flying object protection apparatus of the present invention is a flying object protection apparatus for protecting the upper surface of the protection object from the flying object, and is provided around the protection object. A plurality of support pillars that are pillar-shaped members, a connection part that is directly or indirectly supported by the support pillar part, and is circulated above the protection object, and is attached along the inner periphery of the connection part. One end is fixed to a net-like net part covering the upper surface of the object to be protected and slacking downward in the vertical direction, and a connecting part first fixing part which is a predetermined position of the connecting part, The other end of the connecting portion is fixed to the second fixing portion of the connecting portion that is at another predetermined position of the connecting portion and faces the first fixing portion of the connecting portion, and tension is applied from the one end to the other end. A rope part which is a linear member attached so as to have, and the net part Having a connecting portion for connecting the rope portions.

  The flying object protection equipment of the present invention connects a rope part attached so as to have a tension and a net part for protecting the upper surface of the object to be protected. The flying object protection equipment of the present invention can suitably protect the protection object by suppressing the slack of the net part by the rope part and ensuring the clearance between the net part and the protection object.

  In the flying object protection equipment, the rope portion is positioned vertically above the net portion in the inner peripheral portion of the connecting portion, and the connecting portion is in the inner peripheral portion of the connecting portion. It is preferable that the net part is suspended from the rope part. In this flying object protection equipment, the net part is suspended from the rope part, so that the slack of the net part can be more suitably suppressed and the protection target can be suitably protected.

  In the flying object protection equipment, it is preferable that the net part and the connection part are fixed, and the rope part and the connection part are fixed. In this flying object protection equipment, the net part and the connection part are fixed, and the rope part and the connection part are fixed, so that the net part is fixed to the rope part. It is possible to suitably ensure a vertical clearance between the two and the object to be protected.

  In the flying object protection equipment, it is preferable that a plurality of the connection portions are provided along the extending direction of the rope portion. In this flying object protection equipment, the net part is supported by a plurality of connection parts, so that the slack of the net part can be more suitably suppressed and the object to be protected can be suitably protected.

  In the flying object protection equipment, it is preferable that a plurality of the rope portions are provided in parallel with each other. In this flying object protection equipment, by supporting the net part with a plurality of rope parts, it is possible to more suitably suppress the slack of the net part and to suitably protect the object to be protected.

  In the flying object protection equipment, the connecting portion is circulated in a rectangular shape, the connecting portion first fixing portion is located on one side of the short side of the connecting portion, and the connecting portion second fixing is performed. It is preferable that the part is located on the other side of the short side of the connecting part. This flying object protection equipment ensures a larger clearance between the net part and the object to be protected because the rope part extends along the long side to suppress loosening along the long side of the net part. can do.

  In the flying object protection equipment, one end of the connection portion is fixed to the rope portion, the other end is fixed to the net portion, and a load of a predetermined load value or more is applied to the net portion. When acting, it is preferable to absorb the impact caused by the load by increasing the distance between the one end and the other end. Since this flying object protection equipment can cause the connection part to absorb the impact caused by the flying object, the impact applied to the net part can be suppressed and the object to be protected can be more suitably protected.

  In the flying object protection equipment, it is preferable that the connection portion be plastically deformed when a load greater than the predetermined load value acts on the net portion. Since this flying object protection equipment can absorb the impact caused by the flying object in the connecting part by plastic deformation of the connecting part, the impact applied to the net part can be suppressed and the object to be protected can be protected more suitably. .

  In the flying object protection equipment, the connection portion has the first connection portion on the one end side and the second connection portion on the other end side fixed to each other by a predetermined frictional force. When a load greater than a predetermined load value acts on the net portion, it is preferable that the second connection portion slides with respect to the first connection portion. This flying object protection equipment can absorb the impact of the flying object on the connecting part by the frictional force of the connecting part, so that the impact on the net part can be suppressed and the object to be protected can be protected more suitably. .

  In the flying object protection equipment, between one end of the rope portion and the connecting portion first fixing portion, and between the other end portion of the rope portion and the connecting portion second fixing portion, It is preferable that a buffer portion that absorbs an impact caused by a load acting on the net portion is provided. Since this flying object protection equipment can absorb the shock caused by the flying object in the buffer part, the shock applied to the net part can be suppressed and the object to be protected can be protected more suitably.

  In the flying object protection equipment, it is preferable that the buffer portion includes a spring and a damper. Since this flying object protection apparatus can absorb the impact by a flying object in a spring and a damper, it can suppress the impact concerning a net part and can protect a protection subject more suitably.

  In the flying object protection equipment, it is preferable that the buffer portion includes a deformable member that is plastically deformed when a load greater than the predetermined load value acts on the net portion. This flying object protection equipment can absorb the impact of the flying object on the deformable member by plastic deformation of the deformable member, so that the impact on the net portion can be suppressed and the object to be protected can be more suitably protected. .

  In the flying object protection equipment, the connecting portion connects the support post portions, extends a connecting beam portion that circulates above the object to be protected, and an inner peripheral portion of the connecting beam portion, and connects the connecting portions. A sub-connecting beam part that connects the beam parts, the net part is composed of a plurality, and the plurality of net parts are respectively attached to the connecting beam part and the sub-connecting beam part. Is preferred. Since this flying object protection apparatus has a plurality of net portions, the size of the net portions can be reduced to suppress an increase in weight, and a decrease in impact resistance can be suppressed.

  According to the present invention, an object to be protected can be protected more suitably.

FIG. 1 is a perspective view schematically showing a structure of a protection target device and a flying object protection facility according to the first embodiment. FIG. 2 is a top view schematically showing the structure of the flying object protection equipment according to the first embodiment. FIG. 3 is a side view schematically showing the structure of the flying object protection equipment according to the first embodiment. FIG. 4 is a schematic diagram illustrating an example of the connection between the rope portion and the net portion according to the first embodiment. FIG. 5 is a schematic diagram illustrating an example of the arrangement of the rope portions. FIG. 6 is a schematic diagram illustrating an example of the arrangement of connection portions. FIG. 7 is a schematic diagram illustrating an example of a configuration of a connection unit according to the second embodiment. FIG. 8 is a graph illustrating an example of a load displacement curve of the connection portion according to the second embodiment. FIG. 9 is a schematic diagram illustrating another example of the configuration of the connection unit according to the second embodiment. FIG. 10 is a graph illustrating another example of the load displacement curve of the connecting portion according to the second embodiment. FIG. 11 is a schematic diagram schematically showing the flying object protection equipment according to the third embodiment. FIG. 12 is a schematic diagram schematically showing the flying object protection equipment according to the fourth embodiment. FIG. 13 is a schematic diagram illustrating a configuration of a buffer according to the fourth embodiment. FIG. 14 is a graph illustrating an example of a load displacement curve of the buffer portion according to the fourth embodiment. FIG. 15 is a schematic diagram schematically showing the connection between the net portion and the rope portion according to the modification. FIG. 16 is a perspective view schematically showing an example of the structure of the protection target device and the flying object protection facility according to the second modification. FIG. 17 is a perspective view schematically illustrating another example of the structure of the protection target device and the flying object protection facility according to the second modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this embodiment, Moreover, when there are two or more embodiments, what comprises a combination of each Example is also included.

(First embodiment)
FIG. 1 is a perspective view schematically showing a structure of a protection target device and a flying object protection facility according to the first embodiment. FIG. 2 is a top view schematically showing the structure of the flying object protection equipment according to the first embodiment. FIG. 2 is a schematic view of the flying object protection apparatus 10 as viewed from above. The facility shown in FIG. 1 is, for example, a nuclear facility. A protection target device 1 shown in FIG. 1 is a device provided in a nuclear facility, and is a pump in the first embodiment. The protection target device 1 is installed outdoors, and the bottom surface is in contact with the ground surface. As shown in FIG. 1, the protection target device 1 is covered with flying object protection equipment 10 on the side surface and the upper surface. The protection target device 1 is protected from the outside (outdoors) by the flying object protection equipment 10.

  As shown in FIG. 1, the flying object protection equipment 10 includes a support column 20, a connection unit 22, a net unit 30, and net units 31 </ b> A, 31 </ b> B, 31 </ b> C, and 31 </ b> D.

  As shown in FIG. 1, the support | pillar part 20 has support | pillar 20A, 20B, 20C, 20D. The struts 20A, 20B, 20C, and 20D are members on pillars that are provided around the protection target device 1 and extend vertically upward from the ground surface around the protection target device 1. The struts 20 </ b> A, 20 </ b> B, 20 </ b> C, and 20 </ b> D are higher than the protection target device 1. The struts 20A, 20B, 20C, and 20D are formed of, for example, mold steel (section steel). Moreover, as shown in FIG.1 and FIG.2, each support | pillar 20A, 20B, 20C, 20D is arrange | positioned so that each may comprise any one of the four vertexes of a rectangle. However, the struts 20A, 20B, 20C, and 20D do not have to form four rectangular vertices, but may form deformed rectangular vertices. Moreover, in 1st Embodiment, although the support | pillar is four, as long as two or more are provided around the protection object apparatus 1, the number and installation position will not be limited.

  As shown in FIG.1 and FIG.2, the connection part 22 has connection beam part 22A, 22B, 22C, 22D. The connecting beam portions 22A, 22B, 22C, and 22D are attached to the columns 20A, 20B, 20C, and 20D, and are directly supported by the columns 20A, 20B, 20C, and 20D. More specifically, the connecting beam portions 22A, 22B, 22C, and 22D are beam-like members that connect the columns 20A, 20B, 20C, and 20D, and are circulated above the protection target device 1. The connecting beam portions 22A, 22B, 22C, and 22D are made of, for example, steel mold (section steel). The connecting beam portion 22A extends linearly from one end connected to the tip of the column 20A to the other end connected to the tip of the column 20B. That is, the connecting beam portion 22A connects the support 20A and the support 20B. Similarly, the connecting beam portion 22B extends linearly from one end connected to the tip of the column 20B to the other end connected to the tip of the column 20C. The connecting beam portion 22B connects the support column 20B and the support column 20C. The connecting beam portion 22C extends linearly from one end connected to the tip of the column 20C to the other end connected to the tip of the column 20D. That is, the connecting beam portion 22C connects the support column 20C and the support column 20D. The connecting beam portion 22D extends linearly from one end connected to the tip of the column 20D to the other end connected to the tip of the column 20A. That is, the connecting beam portion 22D connects the support column 20D and the support column 20A.

  Each of the connecting beam portions 22A, 22B, 22C, and 22D constitutes one of four sides of a rectangle in order to connect the tips of the columns 20A, 20B, 20C, and 20D. The connecting beam portions 22A and 22C constitute a long side of the rectangle, and the connecting beam portions 22B and 22D constitute a short side of the rectangle. The connecting beam portions 22A, 22B, 22C, and 22D circulate around the protection target device 1 in a rectangular shape. In other words, the connecting beam portions 22 </ b> A, 22 </ b> B, 22 </ b> C, and 22 </ b> D surround a predetermined space above the protection target device 1. Note that the connecting beam portions 22A, 22B, 22C, and 22D are linear beams, but may be curved, for example, and any shape is possible as long as they circulate above the protection target device 1. .

  Net part 31A, 31B, 31C, 31D is a net-like member which formed the wire rope formed by twisting a steel wire in the shape of a net. The net portions 31 </ b> A, 31 </ b> B, 31 </ b> C, and 31 </ b> D cover the side surface of the protection target device 1. The diameter of the wire rope which comprises net | network parts 31A, 31B, 31C, 31D is 8 mm, for example. Moreover, the mesh of net | network part 31A, 31B, 31C, 31D is a rhombus, and one side is 231 mm. The diameters, mesh shapes, and sizes of the wire ropes of these net portions 31A, 31B, 31C, and 31D are examples.

  As shown in FIG. 1, the net portions 31A, 31B, 31C, and 31D are arranged on a surface formed by two support columns and one connecting beam portion that connects them. More specifically, the net portion 31A is installed so as to cover a surface surrounded by the support column 20A, the support column 20B, and the connecting beam portion 22A. The net portion 31B is installed so as to cover a surface surrounded by the support column 20B, the support column 20C, and the connecting beam portion 22B. The net portion 31C is installed so as to cover a surface surrounded by the support column 20C, the support column 20D, and the connecting beam portion 22C. The net portion 31D is installed so as to cover a surface surrounded by the support column 20D, the support column 20A, and the connecting beam portion 22D. The net portion 31A shown in FIG. 1 is partly reticulated and omitted from the description, but is actually arranged over the entire surface surrounded by the support column 20A, the support column 20B, and the connecting beam portion 22A. Similarly, the net portions 31B, 31C, and 31D are arranged over the entire corresponding surface.

  As shown in FIGS. 1 and 2, the net portion 30 is a net-like member that is provided along the inner periphery of the connecting portion 22 and covers the upper surface of the protection target device 1. The net part 30 is a net in which a wire rope formed by twisting a steel wire is formed in a net shape. The diameter of the wire rope which comprises the net part 30 is 8 mm, for example. Moreover, the mesh of the net part 30 is a rhombus, and one side is 231 mm. In addition, the diameter, mesh shape, and size of the wire rope of these net portions 30 are examples. Further, the net part 30 is not limited to a wire rope as long as the net part 30 is a net-like member having a rigidity high enough to absorb the impact of flying objects. The flying object is assumed to be, for example, 135 kg of steel.

  As shown in FIG. 2, a frame body 24 is attached to the inner circumference of the connecting beam portions 22 </ b> A, 22 </ b> B, 22 </ b> C, 22 </ b> D by a frame body joint portion 26. The frame body 24 is a rectangular frame-shaped member along the inner periphery of the connecting beam portions 22A, 22B, 22C, and 22D. The frame joint portion 26 is a ring-shaped member that bundles the frame body 24 and the connection portion 22 in parallel inside the ring, and a plurality of the frame body joint portions 26 are arranged along the inner periphery of the connection beam portions 22A, 22B, 22C, and 22D. The frame body 24 is supported by the coupling portion 22 above the protection target device 1 by the frame body joint portion 26. Since the frame joint portion 26 supports the frame body 24 on the connecting portion 22, a tensile load, that is, tension acts. Although the distance L1 between the connection part 22 and the frame 24 will be arbitrary if it is the magnitude | size which does not let the flying object assume, it is preferable that it is less than 50 mm, for example.

  The net part 30 is installed so that the outer periphery is attached to the inner periphery of the frame body 24 and covers the inner peripheral surface of the frame body 24. The net portion 30 is attached to the inner periphery of the frame body 24 without applying tension. Therefore, the net part 30 is slackened in the vertical direction lower side, that is, the direction toward the protection target device 1 due to its own weight. The net portion 30 is attached along the inner periphery of the connecting portion 22 via the frame body 24 and covers the upper surface of the protection target device 1. The net part 30 may be directly attached to the connecting part 22 along the inner periphery of the connecting part 22 without using the frame body 24.

  FIG. 3 is a side view schematically showing the structure of the flying object protection equipment according to the first embodiment. As shown in FIG. 2, the flying object protection apparatus 10 further includes rope portions 40A, 40B, 40C, 40D, and 40E. Hereinafter, the rope portions 40A, 40B, 40C, 40D, and 40E will be referred to as the rope portion 40 unless it is particularly necessary to distinguish them. Moreover, as shown in FIG. 3, the flying object protection equipment 10 further has connection parts 50A, 50B, 50C, 50D, and 50E. Hereinafter, the connection portions 50A, 50B, 50C, 50D, and 50E are referred to as the connection portions 50 unless it is particularly necessary to distinguish them.

  The rope part 40 is a linear member formed of a wire rope formed by twisting a steel wire. The diameter of the wire rope constituting the rope portion 40 is preferably larger than the diameter of the wire rope of the net portion 30 and is, for example, 18 mm, but the diameter is arbitrary. Further, the rope portion 40 is not limited to a wire rope as long as it is a net-like member having a rigidity high enough to support the net portion 30.

  As shown in FIG. 2, one end of each of the rope portions 40A, 40B, 40C, 40D, and 40E is attached to a connecting beam portion 22B as a connecting portion first fixing portion. Moreover, rope part 40A, 40B, 40C, 40D, 40E has the other edge part attached to connecting beam part 22D as a connection part 2nd fixing | fixed part. The rope portions 40A, 40B, 40C, 40D, and 40E are positioned above the protection target device 1. The rope portions 40A, 40B, 40C, 40D, and 40E extend from the connecting beam portion 22B to the connecting beam portion 22D, and extend along the connecting beam portions 22A and 22C that are rectangular long sides.

  The rope portions 40A, 40B, 40C, 40D, and 40E are fixed to the connecting beam portion 22B by winding one end portion around the connecting beam portion 22B. The rope portions 40A, 40B, 40C, 40D, and 40E are fixed to the connecting beam portion 22D by winding the other end portion around the connecting beam portion 22D. The rope portions 40A, 40B, 40C, 40D, and 40E are attached so as to have tension between the connecting beam portion 22B and the connecting beam portion 22D. The ropes 40A, 40B, 40C, 40D, and 40E can be fixed by any method as long as the ropes 40A, 40B, 40C, 40D, and 40E are attached so as to have tension between the connecting beam 22B and the connecting beam 22D. Moreover, if rope part 40A, 40B, 40C, 40D, 40E is being fixed to the connection part 22 and is extended to the inner peripheral part of the connection part 22, it is the connection beam part 22B and connection beam part 22D. For example, it may not be installed between the connecting beam portion 22A and the connecting beam portion 22C.

  The rope portions 40A, 40B, 40C, 40D, and 40E are arranged in parallel along the direction (rectangular short side) in which the connecting beam portion 22B and the connecting beam portion 22D extend, and are arranged at equal intervals. ing. However, the intervals between the rope portions 40A, 40B, 40C, 40D, and 40E are arbitrary. Further, the number of the rope portions 40 may not be five, and may be arbitrary. For example, the number may be one or any plural number.

  The connection part 50 is a linear member formed by a wire rope formed by twisting a steel wire. Although the diameter of the wire rope which comprises the connection part 50 is 18 mm, for example, the diameter is arbitrary. The connecting portions 50A, 50B, 50C, 50D, and 50E are provided in the rope portions 40A, 40B, 40C, 40D, and 40E, respectively. Connection portions 50A, 50B, 50C, 50D, and 50E connect rope portion 40 and net portion 30. Note that the connecting portion 50 is not limited to a wire rope and may not be a linear member as long as the rigidity is high enough to support the net portion 30 on the rope portion 40.

  Here, since the net part 30 is installed so that tension does not act, as shown in FIG. 3, the net part 30 is slackened in the lower side in the vertical direction, that is, in the direction toward the protection target device 1. When the net portion 30 is not connected to the rope portion 40 by the connecting portion 50, the net portion 30 is as shown in the net portion 30X in FIG. 3, and the central portion in the long side direction of the rectangle (the extending direction of the rope portion 40) is the vertical direction. It sags downward in the vertical direction so as to have a convex shape toward the lower side. On the other hand, the rope part 40 is installed so that tension | tensile_strength acts, and is not slacking toward the vertical direction lower side. Accordingly, the rope portion 40 is positioned above the net portion 30 in the vertical direction in the inner peripheral portion of the connecting portion 22, that is, in the space above the protection target device 1.

  Here, the connection part 50 connects the rope part 40 and the net part 30. FIG. 4 is a schematic diagram illustrating an example of the connection between the rope portion and the net portion according to the first embodiment. The connection part 50 is a linear member formed by a wire rope formed by twisting a steel wire. As shown in FIG. 4, the connection portion 50 has one end portion 51 fixed to the rope portion 40 and the other end portion 52 fixed to the net portion 30. More specifically, it is preferable that the other end portion 52 of the connection portion 50 is fixed to the crossing portion of the mesh of the net portion 30 (intersection portion of the wire rope). Thereby, the connection part 50 can increase the support strength of the net part 30. As shown in FIG. 3, the connection part 50 suspends the net part 30 from the rope part 40. In addition, although the connection part 50, the rope part 40, and the connection part 50 and the net | network part 30 are being fixed by welding, if fixed, the fixing method is arbitrary.

  As shown in FIG. 3, since the net part 30 is suspended from the rope part 40 by the connection part 50, the net part 30 is loosened upward in the vertical direction at the place connected to the connection part 50 (convex upward), Between the parts connected to the connection part 50, it is slacking downward in the vertical direction (convex downward). Here, when the net part 30 and the rope part 40 are not connected, the distance between the lowest part in the vertical direction of the net part 30 (net part 30X) and the upper surface of the protection target device 1 is L2. Moreover, let the distance between the lowest part in the perpendicular direction of the net part 30 and the upper surface of the protection target apparatus 1 be L3 when the net part 30 and the rope part 40 are connected by the connection part 50. As shown in FIG. 3, the distance L3 is larger than the distance L2. That is, the net part 30 can keep a large clearance with the protection target device 1 by being connected to the rope part 40.

  The connecting portions 50A, 50B, 50C, 50D, and 50E are arranged along the extending direction (long rectangular side) of the rope portion 40, and are arranged at equal intervals. Further, the lengths of the connecting portions 50A, 50B, 50C, 50D, and 50E are the same. However, the intervals between the connecting portions 50A, 50B, 50C, 50D, and 50E are arbitrary. Further, the lengths of the connecting portions 50A, 50B, 50C, 50D, and 50E may be different from each other. Also, the number of connecting portions 50 is not limited to five, and may be arbitrary. For example, the number may be one or any plural number.

  For example, the flying object protection equipment 10 is assembled in the following process. In the flying object protection equipment 10, first, the support column 20 and the connection unit 22 are assembled around the protection target device 1. Next, the frame body 24 to which the net portion 30 is attached is attached to the inner peripheral portion of the connecting portion 22 by the frame body joint portion 26. Then, one end portion of the rope portion 40 is fixed by being wound around the connecting beam portion 22B, and the other end portion of the rope portion 40 is connected to the connecting beam portion 22D in a state where tension is applied. Wind and attach the rope part 40. Then, the rope portion 40 and the net portion 30 are connected by the connection portion 50. However, this process is only an example, and the flying object protection equipment 10 is optional in its assembly process as long as the column part 20, the connecting beam part 22, the net part 30, the rope part 40, and the connection part 50 are provided. It is.

  As described above, the flying object protection equipment 10 according to the first embodiment circulates above the protection target device 1 by connecting the support column 20 provided around the protection target device 1 and the support column 20. The connecting portion 22 is provided. The flying object protection equipment 10 includes a net portion 30 that is attached along the inner circumference of the connecting portion 22 to cover the upper surface of the protection target device 1 and is slackened downward in the vertical direction. And the flying object protection equipment 10 has one end fixed to the connecting beam 22B, the other end fixed to the connecting beam 22D, and has tension from one end to the other end. It has the rope part 40 attached. Moreover, the net part 30 and the rope part 40 are connected by the connection part 50.

  Since the net part 30 covers the upper surface of the protection target device 1, it protects the upper surface of the protection target device 1 from flying objects. The net part 30 is slacking downward in the vertical direction due to its own weight. When the net part 30 is loosened, the clearance between the upper surface of the protection target device 1 and the net part 30 is reduced. If the clearance between the upper surface of the protection target device 1 and the net portion 30 becomes too small, the flying object may collide with the protection target device 1 via the net portion 30 and the protection target device 1 may not be properly protected. There is. However, the flying object protection equipment 10 according to the first embodiment connects the net part 30 to the rope part 40 on which the tension acts. Therefore, the flying object protection equipment 10 suppresses the slack of the net part 30 by the rope part 40 and suppresses the clearance between the upper surface of the protection target device 1 and the net part 30 from being reduced. Therefore, the flying object protection equipment 10 can appropriately protect the protection target device 1 from the flying objects above.

  Here, since the net part 30 is a net-like member, it is composed of more steel wires than the rope part 40. Therefore, the net part 30 has a greater weight than the rope part 40, and the tension necessary for suppressing the slack is greater than that of the rope part 40. For example, when the tension for suppressing the slack of the net part 30 is increased, it is necessary to increase the rigidity of the support column part 20 and the connecting part 22 that support it. Since the flying object protection equipment 10 according to the first embodiment applies tension to the rope portion 40, the necessary tension is small, and the rigidity of the support column 20 and the connecting portion 22 can be suppressed to a necessary level. Further, by connecting the rope part 40 to the net part 30, the impact generated when the flying object collides with the net part 30 can be dispersed also in the rope part 40. Therefore, the flying object protection equipment 10 can increase its impact resistance.

  Moreover, the target apparatus can be suitably protected by providing the flying object protection apparatus 10 in the apparatus of the nuclear facility as in the first embodiment. The flying object protection equipment 10 is preferably used for nuclear facility equipment as in the first embodiment, but may be used for equipment in other facilities.

  Further, the rope portion 40 is positioned above the net portion 30 in the vertical direction in the inner peripheral portion of the connecting portion 22. And the connection part 50 suspends the net part 30 from the rope part 40 in the inner peripheral part of the connection part 22. FIG. The flying object protection equipment 10 can reliably increase the clearance between the upper surface of the protection target device 1 and the net part 30 in the vertical direction by suspending the net part 30 from the rope part 40. Therefore, the flying object protection equipment 10 can appropriately protect the protection target device 1 from the flying objects above.

  The net part 30 and the connection part 50 are fixed, and the rope part 40 and the connection part 50 are fixed. Therefore, in the flying object protection equipment 10, the net part 30 is fixed to the rope part 40, and it is possible to more suitably suppress the slack of the net part and protect the object to be protected.

  A plurality of connection portions 50 are provided along the extending direction of the rope portion 40. The flying object protection equipment 10 supports the net part 30 by the plurality of connection parts 50, thereby more suitably suppressing the slack of the net part 30 and suitably protecting the protection target device 1.

  Moreover, it is preferable that the rope part 40 is provided with two or more in parallel with each other. The flying object protection equipment 10 can more appropriately suppress the slack of the net part 30 and support the object to be protected by supporting the net part 30 with the plurality of rope parts 40. Moreover, the impact applied to the net part 30 can be more suitably distributed by installing the rope part 40 in parallel.

  In addition, the connecting portion 22 is wound in a rectangular shape, and the connecting beam portion 22B (the connecting portion first fixing portion) to which one end of the rope portion 40 is fixed is located on one side of the short side of the rectangle. The connecting beam portion 22D (the connecting portion second fixing portion) to which the other end portion of the rope portion 40 is fixed is located on the other side of the rectangular short side. That is, the rope part 40 extends along the long side of the rectangle. The net part 30 is most slackened at the central part along the long side. Since the flying object protection equipment 10 can suppress the slack along the long side of the net part 30 by the rope part 40 extending to the long side, the clearance between the upper surface of the protection target device 1 and the net part 30 is reduced. Larger can be secured.

  Furthermore, the rope portions 40A, 40B, 40C, 40D, and 40E are arranged at equal intervals. Thereby, the rope part 40 can disperse | distribute the impact concerning the net part 30 equally, and can improve the impact resistance of the flying object protection equipment 10. FIG.

  FIG. 5 is a schematic diagram illustrating an example of the arrangement of the rope portions. As shown in FIG. 5, the rope portions 40 </ b> A, 40 </ b> B, 40 </ b> C, 40 </ b> D, and 40 </ b> E are densely arranged in the central portion along the rectangular short side of the net portion 30 and along the rectangular short side of the net portion 30. The two ends may be arranged sparsely. The net part 30 has a larger slack at the central part along the short side of the rectangle than at both end parts along the short side of the rectangular part of the net part 30. Therefore, in this case, since the flying object protection equipment 10 increases the number of the rope portions 40 in the central portion where the slackness is large, the slackness of the net portion 30 can be more suitably suppressed. In addition, the rope portions 40A, 40B, 40C, 40D, and 40E may have a smaller installation interval from the end portion along the rectangular short side of the net portion 30 toward the center portion. In this case, since the flying object protection equipment 10 can increase the number of rope sections 40 to be installed as the slack of the net section 30 increases, the slack of the net section 30 can be more suitably suppressed.

  Further, the connecting portions 50A, 50B, 50C, 50D, and 50E are arranged at equal intervals. Thereby, the connection part 50 can disperse | distribute the impact concerning the net part 30 equally, and can improve the impact resistance of the flying object protection equipment 10. FIG.

  FIG. 6 is a schematic diagram illustrating an example of the arrangement of connection portions. As shown in FIG. 6, the connecting portions 50 </ b> A, 50 </ b> B, 50 </ b> C, 50 </ b> D, and 50 </ b> E are densely arranged at the center portion along the extending direction of the rope portion 40. In the part, they may be arranged sparsely. The net part 30 has a larger slack in the central part along the extending direction of the rope part 40 than at both end parts along the extending direction of the rope part 40. Since the flying object protection equipment 10 increases the number of connection parts 50 in the central part where the slack of the net part 30 is large, the slack of the net part 30 can be more suitably suppressed. Further, the connection portions 50 </ b> A, 50 </ b> B, 50 </ b> C, 50 </ b> D, and 50 </ b> E may have a smaller installation interval from the end portion along the extending direction of the rope portion 40 toward the center portion. In this case, since the flying object protection equipment 10 can increase the number of connection parts 50 to be installed as the slack of the net part 30 increases, the slack of the net part 30 can be more suitably suppressed. Furthermore, the extending direction of the rope portion 40 in which the plurality of connecting portions 50 are installed is a long side direction of a rectangle. Since the net part 30 is most slackened in the central part along the long side of the rectangle, the flying object protection equipment 10 can more appropriately suppress the slack of the net part 30.

(Second Embodiment)
Next, a second embodiment will be described. The flying object protection equipment 10a according to the second embodiment is different from the flying object protection equipment 10 according to the first embodiment in the configuration of the connecting portion 50a. In the configuration of the flying object protection equipment 10a according to the second embodiment, the description of the parts having the same configuration as the flying object protection equipment 10 according to the first embodiment is omitted.

  FIG. 7 is a schematic diagram illustrating an example of a configuration of a connection unit according to the second embodiment. FIG. 8 is a graph illustrating an example of a load displacement curve of the connection portion according to the second embodiment. As shown in FIG. 7, as for the connection part 50a of the flying object protection equipment 10a which concerns on 2nd Embodiment, one edge part 51a is being fixed to the rope part 40a, and the other edge part 52a is the net | network part 30a. It is fixed to. The connection part 50a is a steel linear member having a low yield point, such as mild steel. When a load equal to or greater than a predetermined load value acts on the net portion 30a, the connecting portion 50a extends by plastic deformation, and the distance between one end 51a and the other end 52a increases. Here, the predetermined load value is a value larger than the weight of the net portion 30a, and is a load value generated when an assumed flying object collides with the net portion 30a.

The horizontal axis in FIG. 8 is the displacement of the connecting portion 50a, that is, the distance between one end 51a and the other end 52a. Moreover, the vertical axis | shaft of FIG. 8 is a load value which acts on the connection part 50a. As shown in FIG. 8, the connecting portion 50a, for example when a predetermined load was k _1, when the load k ₁ following load but may act is elastically deformed, the load k ₁ or more load is applied Plastically deformed. The connecting portion 50a is plastically deformed to increase the distance between the one end portion 51a and the other end portion 52a, thereby absorbing an impact due to a load acting on the net portion 30a. Therefore, the flying object protection equipment 10a according to the second embodiment can suppress the impact applied to the net part 30a and more suitably protect the protection target device 1.

  In addition, the connection part 50a is a load which acts on the net part 30a because the distance between the one end part 51a and the other end part 52a increases when a load greater than a predetermined load acts on the net part 30a. As long as it absorbs the impact caused by the above, it is not limited to absorbing the impact by plastic deformation. FIG. 9 is a schematic diagram illustrating another example of the configuration of the connection unit according to the second embodiment. FIG. 10 is a graph illustrating another example of the load displacement curve of the connecting portion according to the second embodiment. As shown in FIG. 9, in the connection portion 50a, for example, the first connection portion 53a and the second connection portion 55a are fixed with a predetermined frictional force, and a load greater than a predetermined load value acts on the net portion 30a. In this case, the second connecting portion 55a may slide with respect to the first connecting portion 53a.

  More specifically, the first connection portion 53a is a shaft-like member having a shaft portion 54a, and is fixed to the rope portion 40a at one end portion 51a. The second connection portion 55a includes a cylindrical portion 56a, a ring portion 57a, a bottom portion 58a, and a shaft portion 59a. As for the 2nd connection part 55a, the ring part 57a which is a ring-shaped member is being fixed to the inner periphery of the cylinder part 56a which is a cylindrical member. Moreover, the bottom part 58a as a cylinder bottom is attached to the edge part of the cylinder part 56a. Moreover, the shaft part 59a which is an axial member extended on the opposite side to the cylinder part 56a is attached to the surface on the opposite side to the cylinder part 56a of the bottom part 58a. The shaft portion 59a is fixed to the net portion 30a at the other end portion 52a which is the end portion on the opposite side to the bottom portion 58a.

  The outer diameter of the shaft portion 54a of the first connection portion 53a is larger than the inner diameter of the ring portion 57a of the second connection portion 55a. The shaft portion 54a of the first connection portion 53a is press-fitted into the inner diameter of the ring portion 57a of the second connection portion 55a. The net part 30a and the rope part 40a are connected by a first connection part 53a and a second connection part 55a.

  Since the shaft portion 54a of the first connection portion 53a is press-fitted into the ring portion 57a of the second connection portion 55a, when a load greater than a predetermined load value acts on the net portion 30a, the ring of the second connection portion 55a. The part 57a slides with respect to the shaft part 54a of the first connection part 53a, and the distance between one end part 51a of the first connection part 53a and the other end part 52a of the second connection part 55a increases. Here, the predetermined load value in this case is a value larger than the weight of the net portion 30a, and is a load value generated when an assumed flying object collides with the net portion 30a. Further, the static frictional force between the shaft portion 54a of the first connection portion 53a and the ring portion 57a of the second connection portion 55a is set to the same value as the predetermined load value. In this case, the connection part 50a can absorb the impact applied to the net part 30a because the second connection part 55a slides with respect to the first connection part 53a due to a load greater than or equal to a predetermined load. That is, the connection part 50a in this case is a friction damper.

FIG. 10 is a load displacement curve when the connecting portion 50a is a friction damper. The horizontal axis in FIG. 10 is the displacement of the connecting portion 50a, that is, the distance between one end 51a and the other end 52a. Moreover, the vertical axis | shaft of FIG. 10 is a load value which acts on the connection part 50a. As shown in FIG. 10, the connecting portion 50a, for example when a predetermined load and k _2, when a load k ₂ smaller load is applied, the second connecting portion 55a is slid with respect to the first connecting portion 53a Absent. Connecting portion 50a, when the load _{k 2} or more load is applied, the second connecting portion 55a slides with respect to the first connecting portion 53a. Thus, the connection portion 50a, when the load k ₂ or more load is applied to absorb the impact on the net portion 30a.

(Third embodiment)
Next, a third embodiment will be described. The flying object protection equipment 10b according to the third embodiment is different from the flying object protection equipment 10 according to the first embodiment in that a buffer part is provided between the connecting part and the rope part. In the configuration of the flying object protection equipment 10b according to the third embodiment, description of portions having the same configuration as that of the flying object protection equipment 10 according to the first embodiment is omitted.

  FIG. 11 is a schematic diagram schematically showing the flying object protection equipment according to the third embodiment. As shown in FIG. 11, in the flying object protection equipment 10b according to the third embodiment, a buffer portion 60b is provided between the rope portion 40b and the connecting beam portion 22B (the connecting portion first fixing portion). . Moreover, the buffer part 60b is provided between the rope part 40b and the connection beam part 22D (connection part 2nd fixing | fixed part).

  As for the buffer part 60b, the spring part 61b and the damper part 62b are connected in parallel. The buffer part 60b absorbs the impact of the load acting on the flying object that collides with the net part 30. More specifically, the spring part 61b absorbs an impact caused by a load acting on the net part 30, and the damper part 62b attenuates the impact transmitted to the spring part 61b. Since the flying object protection equipment 10b according to the third embodiment can cause the shock of the flying object acting on the net part 30 to be absorbed by the buffer part 60b, the shock applied to the net part 30 is suppressed, and the protection target device 1 Can be more suitably protected. The buffer portion 60b is not limited to the configuration of the spring and the damper, and the configuration is not limited as long as it is provided between the rope portion 40b and the connecting portion 22 and absorbs the impact caused by the load acting on the net portion 30. Is optional.

(Fourth embodiment)
Next, a fourth embodiment will be described. The flying object protection equipment 10c according to the fourth embodiment is different from the flying object protection equipment 10 according to the first embodiment in that a buffer part is provided between the connecting part and the rope part. In the configuration of the flying object protection equipment 10b according to the third embodiment, description of portions having the same configuration as that of the flying object protection equipment 10 according to the first embodiment is omitted.

  FIG. 12 is a schematic diagram schematically showing the flying object protection equipment according to the fourth embodiment. FIG. 13 is a schematic diagram illustrating a configuration of a buffer according to the fourth embodiment. As shown in FIG. 12, in the flying object protection equipment 10c according to the fourth embodiment, a buffer portion 60c is provided between the rope portion 40c and the connecting beam portion 22B (the connecting portion first fixing portion). . Moreover, the buffer part 60c is provided between the rope part 40b and connection beam part 22D (connection part 2nd fixing | fixed part). That is, the flying object protection equipment 10c is common to the third embodiment in that a buffer part is provided, but the structure of the buffer part is different from that of the third embodiment.

  FIG. 13 is a schematic diagram illustrating the buffer portion 60c between the rope portion 40c and the connecting beam portion 22D. As shown in FIG. 13, the rope portion 40c includes a first rope portion 41c and a second rope portion 42c. Further, the buffer portion 60c has a cylindrical portion 63c, a first bottom portion 64c, and a second bottom portion 66c.

  One end of the first rope portion 41c is fixed to the connecting beam portion 22D. The first rope portion 41c extends toward the connecting beam portion 22B, and the other end is fixed to the first bottom portion 64c. The first bottom portion 64c is a disk-shaped metal member. The first bottom portion 64c has a through hole 65c.

  The cylinder portion 63c is disposed between the first bottom portion 64c and the connecting beam portion 22D. The cylindrical portion 63c as a deformable member is a cylindrical member, and is deformed plastically and crushed by an axial compressive load equal to or greater than a predetermined load value. The cylindrical portion 63c is preferably a metal member such as aluminum. The cylinder part 63c is less rigid than the first bottom part 64c.

  The second bottom portion 66c is a disk-shaped metal member, and has higher rigidity than the cylindrical portion 63c. The second bottom portion 66c has a through hole 67c. The second bottom portion 66c is disposed between the cylindrical portion 63c and the connecting beam portion 22D. The second bottom portion 66c is fixed to one end portion of the second rope portion 42c. The second rope portion 42 c extends from one end portion toward the connecting beam portion 22 </ b> B, and is connected to the net portion 30 via the connection portion 50. In addition, although description is abbreviate | omitted, the buffer part 60c is similarly provided between the other edge part of the 2nd rope part 42c, and the connection beam part 22B.

  The first rope portion 41c passes through the inner peripheral portion of the through hole 67c of the second bottom portion 66c and is disposed inside the cylindrical portion 63c. The second rope portion 42c passes through the inner peripheral portion of the through hole 65c of the first bottom portion 64c and is disposed inside the cylindrical portion 63c. Here, the 1st rope part 41c and the 2nd rope part 42c are attached so that tension may act. Accordingly, the first bottom portion 64c is pulled by the load T1 in the direction of the connecting beam portion 22D, and the second bottom portion 66c is pulled by the load T2 in the direction opposite to the connecting beam portion 22D (direction of the connecting beam portion 22B). Due to the loads T1 and T2 in this case, the first bottom portion 64c and the cylindrical portion 63c are in contact with each other, and the second bottom portion 66c and the cylindrical portion 63c are in contact with each other. Note that the compressive load generated in the axial direction of the cylindrical portion 63c by the loads T1 and T2 is smaller than a predetermined load value at which the cylindrical portion 63c is plastically deformed. Therefore, the cylinder part 63c is not plastically deformed.

  Here, when a flying object collides with the net part 30, the impact concerning the net part 30 is transmitted to the 2nd rope part 42c. This impact is transmitted to the second bottom portion 66c fixed to the second rope portion 42c. The impact transmitted to the second bottom portion 66c generates a load T3 in a direction opposite to the connecting beam portion 22D (direction of the connecting beam portion 22B). When the compressive load generated in the axial direction of the cylindrical portion 63c by the load T3 becomes a predetermined load value or more, the cylindrical portion 63c is plastically deformed and is crushed in the axial direction. The flying object protection equipment 10c can absorb the impact applied to the net part 30 by plastic deformation of the cylindrical part 63c.

FIG. 14 is a graph illustrating an example of a load displacement curve of the buffer portion according to the fourth embodiment. The horizontal axis in FIG. 14 is the displacement of the cylindrical portion 63c, that is, the axial length of the cylindrical portion 63c. The vertical axis | shaft of FIG. 14 is a load value concerning the axial direction of the cylinder part 63c. As shown in FIG. 14, a predetermined load value when the k _3, the cylindrical portion 63c is elastically deformed when a load k ₃ smaller load acts, when a load k ₃ or more load is applied Plastically deformed and crushed in the axial direction.

  Thus, in the flying object protection equipment 10c according to the fourth embodiment, the buffer 60c has the cylindrical portion 63c as a deformable member. The cylindrical portion 63 c is plastically deformed when a load greater than a predetermined load value acts on the net portion 30. Since the flying object protection equipment 10c absorbs an impact applied to the net part 30 by plastic deformation of the cylinder part 63c, the protection target device 1 can be protected more suitably. The buffer portion 60c is not limited to the one described above, and is provided between the rope portion 40c and the connecting portion 22 and is plastically deformed when a load greater than a predetermined load value acts on the net portion 30. If present, the configuration is arbitrary.

(Modification 1)
Next, Modification 1 of the first embodiment will be described. The flying object protection equipment 10d according to Modification 1 is different from the first embodiment in that the net part and the rope part are directly connected. In the configuration of the flying object protection equipment 10d according to the first modification, the description of the parts having the same configuration as that of the flying object protection equipment 10 according to the first embodiment is omitted.

  FIG. 15 is a schematic diagram schematically illustrating the connection between the net portion and the rope portion according to the first modification. As shown in FIG. 15, the net part 30d according to the first modification is directly connected to the rope part 40d via the connection part 50d. The connection part 50d which concerns on the modification 1 shows the connection point of the net part 30d and the rope part 40d, for example, is a welding location of the net part 30d and the rope part 40d. That is, the net part 30 and the rope part 40 according to the first embodiment do not need to be connected via the connection part 50 that is, for example, a linear member, and are directly connected to each other as shown in the first modification. It may be a thing. Also in this case, since the flying object protection equipment 10d suppresses the slack of the net part 30d, the protection target device 1 can be protected more suitably.

(Modification 2)
Next, Modification 2 of the first embodiment will be described. The flying object protection equipment 10e according to Modification 2 is different from the first embodiment in that it has a plurality of net portions. In the configuration of the flying object protection equipment 10e according to the modified example 2, the description of the parts having the same configuration as that of the flying object protection equipment 10 according to the first embodiment is omitted.

  FIG. 16 is a perspective view schematically showing an example of the structure of the protection target device and the flying object protection facility according to the second modification. As shown in FIG. 16, the flying object protection apparatus 10 e according to Modification 2 includes a support column 20, a connection unit 22 e, net units 30 </ b> A and 30 </ b> B, and a rope unit 40.

  The connecting portion 22e has connecting beam portions 22A, 22B, 22C, 22D and a sub connecting beam portion 23A. The sub-connecting beam portion 23A is a beam-like member that extends the inner peripheral portions of the connecting beam portions 22A, 22B, 22C, and 22D and connects the connecting beam portions. In FIG. 16, the sub-connecting beam portion 23A is attached to the connecting beam portion 22B and the connecting beam portion 22D, and connects the connecting beam portion 22B and the connecting beam portion 22D. In other words, the sub-connecting beam portion 23A is indirectly supported by the support column 20 via the connecting beam portion 22B and the connecting beam portion 22D. The sub-connecting beam portion 23A only needs to connect the connecting beam portions. For example, the sub-connecting beam portion 23A may be attached to the connecting beam portion 22A and the connecting beam portion 22C and connect them.

  The net portions 30A and 30B are attached to the connecting beam portion and the sub-connecting beam portion 23A, and cover a plane surrounded by the connecting beam portion and the sub-connecting beam portion 23A. More specifically, the net portion 30A is attached to the connecting beam portion 22B, the connecting beam portion 22C, the connecting beam portion 22D, and the auxiliary connecting beam portion 23A, and the connecting beam portion 22B, the connecting beam portion 22C, the connecting beam portion 22D, and the auxiliary beam portion 22D. A plane surrounded by the connecting beam portion 23A is covered. The net portion 30B is attached to the connecting beam portion 22A, the connecting beam portion 22B, the auxiliary connecting beam portion 23A, and the connecting beam portion 22D, and the connecting beam portion 22A, the connecting beam portion 22B, the auxiliary connecting beam portion 23A, and the connecting beam portion 22D. Cover the plane surrounded by. Similarly, the net portions 30A and 30B are the same net members as the net portion 30 according to the first embodiment.

  Thus, the flying object protection equipment may have a plurality of net portions attached to the sub-connection beam portions that connect the connection beam portions. Specifically, in the flying object protection equipment 10e according to the modified example, the connecting portion 20e connects the support column portions 20 to each other and connects the connecting beam portions 22A, 22B, 22C, and 22D that circulate above the protection target device 1. And a sub-connecting portion 23A that extends to the inner periphery of the connecting beam portions 22A, 22B, 22C, and 22D and connects the connecting beam portions 22A, 22B, 22C, and 22D. In this case, since the connection part 20e has a connection beam part and a sub-connection beam part, it can be said that it is directly or indirectly supported by the support | pillar part 20. FIG. The flying object protection equipment 10e has a plurality of net portions (net portions 30A and 30B), and the net portions 30A and 30B are attached to at least one of the connecting beam portion and the sub-connecting portion 23A. Since the flying object protection apparatus 10e according to the modification includes a plurality of net portions, the size of the net portions is reduced to suppress an increase in gravity, and thus the impact resistance can be increased. As shown in FIG. 16, the net part 31 </ b> A that covers the side surface of the protection target device 1 is configured by one net part, but similarly to the net units 30 </ b> A and 30 </ b> B that cover the top surface of the protection target device 1, It may be composed of a plurality of net parts. In this case, for example, another strut portion is also provided between the strut portion 20A and the strut portion 20B, and one net portion is provided between the strut portion 20A and this another strut portion. Another one net part is provided between the part and the column part 20B. Similarly, each of the net portions 31B, 31C, and 31D may include a plurality of net portions.

  In the above description, the two net units 30A and 30B have been described, but there may be three or more net units. Hereinafter, a case where there are four net units will be described. FIG. 17 is a perspective view schematically illustrating another example of the structure of the protection target device and the flying object protection facility according to the second modification. As shown in FIG. 17, the flying object protection equipment 10e according to the modified example 2 includes a support column 20, a connecting unit 22e, nets 30C, 30D, 30E, and 30F, and rope units 40C, 40D, 40E, and 40F. Have

  The connection part 22e shown in FIG. 17 has connection beam part 22A, 22B, 22C, 22D, and sub connection beam part 23A, 23B. The sub-connecting beam portions 23A and 23B are beam-like members that extend the inner peripheral portions of the connecting beam portions 22A, 22B, 22C, and 22D and connect the connecting beam portions. The sub-connecting portion 23A connects the connecting beam portion 22B and the connecting beam portion 22D. The sub-connecting portion 23B connects the connecting beam portion 22A and the connecting beam portion 22C. The sub-connecting beam portion 23A and the sub-connecting portion 23B are connected to each other at the center portion to form a cross shape.

  The net portions 30C, 30D, 30E, and 30F are attached to the connecting beam portion and the sub-connecting beam portion, and cover a plane surrounded by the connecting beam portion and the sub-connecting beam portion. More specifically, the net portion 30C is attached to the connecting beam portion 22C, the auxiliary connecting beam portion 23B, the auxiliary connecting beam portion 22A, and the connecting beam portion 22D, and the connecting beam portion 22C, the auxiliary connecting beam portion 23B, and the auxiliary connecting beam portion. A plane surrounded by 22A and the connecting beam portion 22D is covered. The net portion 30D is attached to the connecting beam portion 22A, the sub-connecting beam portion 23B, the sub-connecting beam portion 22A, and the connecting beam portion 22D, and the connecting beam portion 22A, the sub-connecting beam portion 23B, the sub-connecting beam portion 22A, and the connecting beam. A plane surrounded by the portion 22D is covered. The net portion 30E is attached to the connecting beam portion 22C, the sub-connecting beam portion 23B, the sub-connecting beam portion 22A, and the connecting beam portion 22B, and the connecting beam portion 22C, the sub-connecting beam portion 23B, the sub-connecting beam portion 22A, and the connecting beam. A plane surrounded by the portion 22B is covered. The net portion 30F is attached to the connecting beam portion 22A, the connecting beam portion 22B, the sub connecting beam portion 23A, and the sub connecting beam portion 22B, and the connecting beam portion 22A, the connecting beam portion 22B, the sub connecting beam portion 23A, and the sub connecting beam. A plane surrounded by the portion 22B is covered. The net portions 30C, 30D, 30E, and 30F are attached to the connection beam portion and the sub-connection beam portion as described above, but may be attached only to the sub-connection beam portion depending on the arrangement of the net portion. Good. For example, when four sub-connecting beam portions form a rectangular plane on the inner peripheral portion, a part of the net portion covers a plane formed by the four sub-connecting beam portions. In this case, the partial net portion is attached only to the four sub-connecting beam portions constituting the plane.

  In FIG. 17, rope portions 40C, 40D, 40E, and 40F are attached to the connecting beam portion and the sub-connecting beam portion 23A, respectively. One end of the rope portions 40C and 40D is attached to the connecting beam portion 22D as the connecting portion first fixing portion, and the other end portion is the sub connecting beam portion 23B as the connecting portion second fixing portion. Installed on. The rope portion 40C is provided above the net portion 30C and is connected to the net portion 30C by the connecting portion 50 in the same manner as in the first embodiment. The rope portion 40D is provided above the net portion 30D and is connected to the net portion 30D by the connection portion 50 in the same manner as in the first embodiment.

  One end of each of the rope portions 40E and 40F is attached to the sub-connection beam portion 23B as the connection portion first fixing portion, and the other end portion is the connection beam portion 22B as the connection portion second fixing portion. Installed on. The rope portion 40E is provided above the net portion 30E and is connected to the net portion 30E by the connecting portion 50 in the same manner as in the first embodiment. The rope portion 40F is provided above the net portion 30F, and is connected to the net portion 30F by the connection portion 50 in the same manner as in the first embodiment. However, the rope portions 40C, 40D, 40E, and 40F may have one end attached to the connecting beam portion 22B and the other end attached to the connecting beam portion 22D, as in the first embodiment. .

  Thus, when having a plurality of net portions, one end of the rope portion is attached to the connecting beam portion or the sub-connecting beam portion as the connecting portion first fixing portion, and the other end portion is fixed to the connecting portion second fixing. It is attached to the connecting beam portion or the sub-connecting beam portion as a portion, and may be provided above any one of the plurality of net portions in the vertical direction.

  As mentioned above, although embodiment and modification of this invention were described, embodiment is not limited by the content of these embodiment and modification. In addition, the above-described constituent elements include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the above-described components can be appropriately combined. Furthermore, various omissions, substitutions, or changes of the constituent elements can be made without departing from the spirit of the above-described embodiments and the like.

DESCRIPTION OF SYMBOLS 1 Protection target apparatus 10, 10a, 10b, 10c, 10d Projectile object protection equipment 20 Support | pillar part 20A, 20B, 20C, 20D Support | pillar 22 Connection part 22A, 22B, 22C, 22D Connection beam part 23A, 23B Sub-connection beam part 24 Body 26 Frame joint part 30, 30a, 30d, 30X, 31A, 31B, 31C, 31D Net part 40, 40A, 40B, 40C, 40D, 40E, 40a, 40b, 40c, 40d Rope part 41c First rope part 42c Second rope portion 50, 50A, 50B, 50C, 50D, 50E, 50a, 50d Connection portion 51, 51a One end portion 52, 52a The other end portion 53a First connection portion 54a Shaft portion 55a Second connection portion 56a Tube Part 57a Ring part 58a Bottom part 59a Shaft part 60b, 60c Buffer part 61b Spring part 62b Damper part 6 3c tubular portion 64c first bottom 65c through hole 66c second bottom 67c through hole k _{1, k} 2, _{k 3} loads L1, L2, L3 distances T1, T2, T3 load

Claims (13)

A flying object protective equipment for protecting the upper surface of the object to be protected from flying objects,
A plurality of support columns that are columnar members provided around the object to be protected;
A connecting part that is supported directly or indirectly between the support parts and is circulated above the object to be protected;
A net-like net part that is attached along the inner periphery of the connecting part and covers the upper surface of the object to be protected, and is slackened downward in the vertical direction;
One end of the connecting portion is fixed to the connecting portion first fixing portion, which is a predetermined position of the connecting portion, and the connecting portion is located at another predetermined position of the connecting portion and faces the first fixing portion of the connecting portion. A rope portion, which is a linear member that is attached to the other fixing portion so as to have tension from the one end portion to the other end portion;
A connecting portion connecting the net portion and the rope portion;
The flying object protection equipment. The rope part is positioned vertically above the net part in the inner peripheral part of the connecting part,
The said connection part is a flying object protection equipment of Claim 1 which has suspended the said net part from the said rope part in the inner peripheral part of the said connection part.   The flying object protection equipment according to claim 2, wherein the net part and the connection part are fixed, and the rope part and the connection part are fixed.   The said connection part is a flying object protection equipment of Claim 2 or Claim 3 provided with two or more along the extension direction of the said rope part.   5. The flying object protection apparatus according to claim 2, wherein a plurality of the rope portions are provided in parallel to each other.   The connecting portion is wound around in a rectangular shape, the connecting portion first fixing portion is located on one side of the short side of the connecting portion, and the connecting portion second fixing portion is connected to the connecting portion. The flying object protection equipment according to any one of claims 2 to 5, which is located on the other side of the short side.   The connection part has one end fixed to the rope part and the other end fixed to the net part, and when a load greater than a predetermined load value acts on the net part, The flying object protection apparatus according to any one of claims 2 to 6, wherein an impact caused by the load is absorbed by increasing a distance between an end portion and the other end portion.   The said connection part is a flying object protection equipment of Claim 7 when a load more than the said predetermined load value acts on the said net | network part.   In the connecting portion, the first connecting portion on the one end side and the second connecting portion on the other end side are fixed to each other by a predetermined frictional force, and a load equal to or higher than a predetermined load value is obtained. The flying object protection equipment according to claim 7, wherein when the second acting part acts on the net part, the second connecting part slides relative to the first connecting part.   A load acting on the net portion between one end portion of the rope portion and the connecting portion first fixing portion and between the other end portion of the rope portion and the connecting portion second fixing portion. The flying object protection apparatus according to any one of claims 2 to 6, further comprising a buffer portion that absorbs an impact caused by the above.   The flying object protection apparatus according to claim 10, wherein the buffer section includes a spring and a damper.   The said buffer part is a flying object protection equipment of Claim 10 provided with the deformation member which deforms plastically when the load more than the said predetermined | prescribed load value acts on the said net | network part. The connecting portion connects the supporting column portions, extends a connecting beam portion that circulates above the object to be protected, and an inner peripheral portion of the connecting beam portion, and connects the connecting beam portions to each other. A connecting beam portion;
The said net | network part is comprised with two or more, The said some net | network part is attached to at least any one of the said connection beam part or the said sub-connection beam part, The any one of Claims 1-12. The flying object protection equipment described in 1.

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