JP2021105256A - Net support structure and method of mounting net support structure - Google Patents

Abstract

To provide a net support structure capable of being mounted with a small work load by having sufficient strength with a simple constitution, and a mounting method of the net support structure.SOLUTION: A net support structure is provided with a frame capable of supporting a net for covering the opening of the building, and an anchor for fixing the frame to the building. The anchor secures the frame to the building at a support position away from the load bearing point of the net in the frame.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a net support structure and a method of attaching the net support structure.

Buildings, which are structures, are generally provided with openings for the purpose of carrying in / out equipment / personnel and ventilation. In such an opening, there is a possibility that flying objects may enter the space inside the building from the outside. The flying object may be generated by, for example, a flying object such as a gust or a tornado, an aircraft falling, or a fire explosion in a nearby chemical factory.

The intrusion of flying objects through the openings may affect the equipment installed inside the building. In order to prevent such intrusion of flying objects, it is conceivable to cover the opening with an iron plate having sufficient strength, but it is difficult to secure the opening and the weight becomes large, which is disadvantageous in terms of earthquake resistance. Prone. On the other hand, for example, Patent Document 1 describes that a wire net is used as an intrusion suppressing portion provided in the opening in order to prevent the intrusion of flying objects from the opening. The wire net is lighter in weight than the iron plate, and is advantageous in that it is easy to secure an opening in the building.

Japanese Unexamined Patent Publication No. 2015-132137

In Patent Document 1, the wire net attached to the opening of the building receives flying objects from the outside to prevent the flying objects from entering the inside of the building. Such a wire net needs to be fixed to the building with sufficient strength by a fixing structure such as an anchor so that it can sufficiently withstand the load acting when it receives a flying object. When the wire net is fixed directly to the building, the load generated when the flying object is received by the wire net acts directly on the anchor that fixes the wire net to the building. Therefore, in order to secure sufficient fixing strength of the wire net to the building, the number of anchors must be increased, and the period required for the installation work to the building becomes long.

At least one embodiment of the present disclosure has been made in view of the above circumstances, and a net support structure that can be mounted with a small work load and a method of mounting the net support structure by having sufficient strength with a simple configuration. The purpose is to provide.

The net mounting structure according to some embodiments of the present disclosure is designed to solve the above problems.
A frame that can support the net to cover the opening of the building,
Anchors for fixing the frame to the building,
With
The anchor fixes the frame to the building at a support position away from the load support point of the net in the frame.

The method of mounting the net mounting structure according to some embodiments of the present disclosure is to solve the above problems.
A frame that can support the net to cover the opening of the building,
An anchor for fixing the frame to the building via a support member,
With
The anchor is a method of attaching a net support structure for fixing the frame to the building at a support position away from the load support point of the net in the frame.
The process of attaching the net to the frame and
A step of fixing the support member to the building with the anchor,
A step of transporting the frame to which the net is attached and attaching it to the support member fixed to the building by the anchor.
To be equipped.

According to at least one embodiment of the present disclosure, it is possible to provide a net support structure that can be mounted with a small work load and a method of mounting the net support structure by having sufficient strength with a simple configuration.

FIG. 1 is a perspective view showing an overall configuration of a net support structure according to an embodiment of the present disclosure. FIG. 5 is a cross-sectional view taken along the line LL of FIG. It is an enlarged view in the region M of FIG. It is a modification of FIG. It is a schematic diagram which shows schematic the net support structure of FIG. 1 and FIG. It is a modification of FIG. It is a modification of FIG. It is a modification of FIG. It is a modification of FIG. 9 is a cross-sectional view taken along the line PP of FIG. It is a modification of FIG. FIG. 12 is a flowchart showing a method of attaching the net support structure according to at least one embodiment of the present disclosure for each process.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention to this, and are merely explanatory examples. do not have.

FIG. 1 is a perspective view showing the overall configuration of the net support structure 1 according to the embodiment of the present disclosure, and FIG. 2 is a cross-sectional view taken along the line LL of FIG. 1 and 2 show how the net support structure 1 is attached to the wall 4 of the building 2 to be attached. The building 2 is erected on a foundation (not shown) buried in the ground, and FIGS. 1 and 2 show a wall 4 which is a part of the building 2. The wall 4 is erected along a substantially vertical direction and constitutes at least a part of the appearance of the building 2. A space 6 is provided inside surrounded by the wall 4. The space 6 is an arbitrary space having an area according to the purpose, and for example, equipment and the like can be arranged.

The wall 4 has a predetermined thickness defined by an outer wall surface 4a facing the outside and an inner wall surface 4b facing the space 6. In the following description, a three-dimensional Cartesian coordinate system including an X-axis along the vertical direction on the XY plane parallel to the wall 4, a Y-axis perpendicular to the X-axis on the XY plane, and a Z-axis perpendicular to the XY plane. Will be described using.

The wall 4 has an opening 8. The opening 8 can take any shape, but in the present embodiment, as an example, the opening 8 having a substantially rectangular cross-sectional area on the XY plane is shown. More specifically, the opening 8 has an opening cross-sectional area having a substantially rectangular shape defined by a short side L1 along the X direction and a long side L2 (> L1) along the Y direction.

An opening reinforcing bar 10 for reinforcement is provided in the vicinity of the opening 8 of the wall 4. The opening reinforcing bar 10 is provided at the corner of the opening 8 on the outer wall surface 4a side to compensate for the local strength decrease due to the presence of the opening 8. Such an opening reinforcing bar 10 extends along the edge of the opening 8 so as to correspond to the shape of the opening 8. Specifically, the opening reinforcing bar 10 extends with a constant width so as to surround the opening 8 on the XY plane, and the inside thereof coincides with the short side L1 and the long side L2 of the opening 8. It is designed to be. Further, the opening reinforcing bar 10 extends from the outer wall surface 4a to a predetermined depth L3 (<thickness L4 of the wall 4) along the Z direction.

For example, when the building 2 is a nuclear reactor building that constitutes a part of a nuclear power plant, the equipment that constitutes the nuclear reactor is arranged in the space 6. Since the wall 4 constituting the building 2 is provided with the opening 8 as described above, a flying object from the outside invades the space 6 inside the building 2 through the opening 8 in a strong wind. It is necessary to prevent that. For such a purpose, the net support structure 1 is attached to the building 2 in a state of supporting the net for receiving the flying object, so that the flying object from the outside is received by the net and the space 6 of the flying object is reached. The equipment and the like arranged in the space 6 are protected by preventing the invasion of the space 6.

The net support structure 1 includes a frame 12 for supporting a net (not shown) for covering the opening 8 of the building 2. The frame 12 has a load bearing point for supporting the net. The load support point is a position where a load from the net is input when the net supported by the frame 12 receives a flying object. Although the specific configuration of the net attached to the frame 12 will be omitted, for example, the load support point is a net that receives flying objects because the support wire attached to the net is configured to be engageable. The load from is input to the load support point via the support wire.

The frame 12 has a shape corresponding to the opening 8. In the present embodiment, since the opening 8 has a substantially rectangular shape as described above, the frame 12 also has a substantially rectangular shape. Specifically, as shown in FIG. 2, when the frame 12 is attached to the vicinity of the opening 8 from the outer wall surface 4a side, the inner edge of the frame 12 and the inner edge of the opening 8 coincide with each other. It may be designed to. As a result, when the frame 12 is attached to the opening 8, the opening 8 is not narrowed, so that the influence of attaching the net support structure 1 to the building 2 can be reduced.

The frame 12 may be configured by combining frame members 12a to 12d having an H-shaped vertical cross section in the extending direction. By adopting the frame members 12a to 12d having such an H-shape, the frame 12 can be made lighter and stronger than the simple rod-shaped member. This is effective in reducing the work load when attaching the net support structure 1 to the building 2.

In the present embodiment, the frame members 12a and 12c extending in the X direction have a length corresponding to the short side L1 of the opening 8 and in the Y direction so as to correspond to the opening 8 having a substantially rectangular shape. The extending frame members 12b and 12d have a length corresponding to the long side L2 of the opening 8, and the frame 12 is formed by combining these. The frame members 12a to 12d are connected by, for example, bolting between the members, but the connecting method is not limited to this.

FIG. 3 is an enlarged view in the region M of FIG. Each frame member 12a to 12d having an H shape has a first recess 14 that opens inward on the ZX plane and a second recess 16 that opens outward in the opening 8. The first recesses 14 of the frame members 12a to 12d are connected along the inner circumference of the frame 12 when the frame members 12a to 12d are connected to each other to form the frame 12, thereby forming a net (not shown). A space is formed for arranging the wire W attached to the.

As shown in FIG. 3, a wire W for supporting the net is arranged inside the first recess 14. As a result, even when the wire W supporting the net is deformed in the direction indicated by the arrow N in FIG. 3 due to the load due to the weight of the net supported by the wire, the wire W is formed by the wall surface forming the first recess 14. Since it is surrounded, it is possible to prevent an extra gap from being generated between the frame and the frame 12. Further, when the frame 12 is viewed from the outside, the wire W supporting the net is arranged so as to be hidden inside the first recess 14, so that the wire W can be suitably protected from the outside.

FIG. 4 is a modification of FIG. In this modification, the frame 12 is provided with a lid portion 18 that covers the second recess 16. The lid portion 18 is fixed to the frame 12 by, for example, bolts (not shown). By covering the second recess 16 with the lid portion 18 in this way, the rigidity of the H-shaped frame 12 can be further improved.

Further, the lid portion 18 shown in FIG. 4 may be used for the frame member 12b arranged above the four frame members 12a to 12d constituting the frame 12. In the second recess 16 of the frame member 12b arranged above, when the net support structure 1 is attached to the building 2 located outdoors, rainwater or the like easily enters from above. Therefore, by covering the second recess 16 of the frame member 12b arranged above with the lid portion 18, it is possible to suitably prevent such intrusion of rainwater and the like.

Since each of the frame members 12a to 12d has an H-shaped cross section as described above, it is possible to easily attach a member such as a louver to the side surface thereof.

Returning to FIGS. 1 and 2, the frame 12 having such a configuration is fixed to the building 2 by the anchor 22. The anchor 22 fixes the frame 12 to the building 2 at the support positions SP1 to SP4 set in the frame 12. The number of anchors 22 at each of the support positions SP1 to SP4 is set to such an extent that the strength required for stably attaching the net support structure 1 to the building 2 can be obtained, but the net support structure 1 of the present embodiment will be described later. By providing the above-mentioned configuration, the number of anchors 22 at each of the support positions SP1 to SP4 can be reduced.

As shown in FIGS. 1 and 2, the anchor 22 may fix the frame 12 via the support member 30. One end of the support member 30 is fixed to the support positions SP1 to SP4 set on the frame 12, and the other end is fixed to the building 2 by the anchor 22. By using such a support member 30, the fixed position of the anchor 22 to the building 2 can be flexibly set without being restricted by the shape of the frame 12.

The support member 30 may include a base plate 32 and a connecting member 34. The base plate 32 is fixed to the building 2 by an anchor 22. The base plate 32 has, for example, a flat plate shape that can be surface-contacted with the wall 4 of the building 2, and is fixed by a plurality of anchors 22. The connecting member 34 is a member for connecting the base plate 32 fixed to the building 2 by the anchor 22 and the frame 12 by interposing between the base plate 32 and the frame 12.

The anchor 22 for fixing the frame 12 may be arranged so as to avoid the opening reinforcing bar 10 provided in the opening 8. If the anchor 22 is fixed directly to the opening reinforcing bar 10, the reinforcing effect of the opening reinforcing bar 10 is reduced. However, by fixing the anchor 22 while avoiding the opening reinforcing bar 10 in this way, the opening is reinforced. The frame 12 can be installed while maintaining the reinforcing effect of the muscle 10. In the present embodiment, since the frame 12 is fixed by the anchor 22 via the support member 30, the layout that avoids the opening reinforcing bar 10 can be easily realized by adjusting the length of the support member 30.

Here, FIG. 5 is a schematic view schematically showing the net support structure 1 of FIGS. 1 and 2. In FIG. 5, load support points LP1 to LP4 for supporting the wire W supporting the net with respect to the frame 12 are provided at four corner portions C1 to C4 of the frame 12 having a substantially rectangular shape, respectively. The load support points LP1 to LP4 are provided inside the first recess 14 as described above with reference to FIG. Further, FIG. 5 shows the support positions SP1 to SP4 of the frame 12 by the anchor 22 (the support positions SP1 to SP4 are the frame 12 when the frame 12 is fixed to the building 2 via the support member 30. The connection position of the support member 30 with respect to the above).

As shown in FIG. 5, the support positions SP1 to SP4 are set apart from the load support points LP1 to LP4. When the net supported by the frame 12 is deformed, at least a part of the load input from the load support points LP1 to LP4 is shared by the frame 12 and does not act directly on the anchor 22. As a result, the load acting on the anchor 22 is reduced, and the number of anchors 22 required to fix the frame 12 to the building 2 can be reduced. Therefore, the net support structure 1 can be attached to the building 2 with a simpler configuration. Is possible. This is advantageous in reducing the work load, such as shortening the construction period for attaching the net support structure 1 to the building 2 and reducing the weight of the net support structure 1.

In the present embodiment, the load support points LP1 to LP4 of the frame 12 are provided at the corner portions C1 to C4 as described above, and the support positions SP1 to SP4 are provided at positions away from the corner portions C1 to C4. ing. As a result, at least a part of the load input from the load support points LP1 to LP4 is shared and acts on the frame 12, and the rest is supported provided on each side between the adjacent corner portions C1 to C4. It will be transmitted to the building 2 via the positions SP1 to SP4.

Further, in the present embodiment, a plurality of support positions SP1 to SP4 of the frame 12 by the anchor 22 are provided along the frame 12. In the embodiment of FIG. 5, two support positions are provided for each of the two long sides of the frame 12 having a substantially rectangular shape (SP1 and SP4 are provided on the upper long side, and the lower long side is provided. Is provided with SP2 and SP3). As a result, the support span between the adjacent support positions SP1 to SP4 is shortened, and the load input to the frame 12 when the flying object is received by the net can be more effectively dispersed.

Further, the support positions SP1 to SP4 provided on the frame 12 may be provided symmetrically with respect to the central portion O of the frame 12. By arranging the support positions SP1 to SP4 symmetrically, the component forces of the loads input from the corners C1 to C4 of the frame 12 are balanced in the substantially central portions 15a to 15d of each side of the frame 12, and the good resistance is good. It can exert loadability. As a result, the load input to the frame 12 when the flying object is received by the net can be more preferably dispersed.

Although FIG. 5 illustrates a case where the support member 30 is arranged along the vertical direction, the support member is as long as the support positions SP1 to SP4 are separated from the load support points LP1 to LP4. The extending direction of 30 may be inclined with respect to the vertical direction.

FIG. 6 is a modification of FIG. In the above-described embodiment, as shown in FIG. 5, two support positions SP1 to SP4 are set for each of the two upper and lower long sides of the frame 12 having a substantially rectangular shape, and the respective support positions SP1 to SP1 are set. The support member 30 was provided in SP4. In the modified example shown in FIG. 6, in addition to the embodiment of FIG. 5, support positions SP5 and SP6 are added to the left and right short sides of the frame 12, respectively, and the support members 30 are also added to the support positions SP5 and SP6, respectively. The frame 12 may be fixed by the anchor 22 via the anchor 22.

FIG. 7 is another modification of FIG. In the modified example shown in FIG. 7, two support positions SP1 to SP4 are set for each of the two left and right short sides of the frame 12 having a substantially rectangular shape, and the support members are set at the respective support positions SP1 to SP4. 30 is provided. In this modification, the upper support position SP5, which is the fifth support position with respect to the upper one long side of the two upper and lower long sides, is further set, and the support member 30 is similarly set at the upper support position SP5. It is provided. By providing the upper support position SP5 in this way, the weight of the frame itself and the weight due to snow accumulation in the snowfall area are supported by the anchor 22 at the upper support position SP5, and the stability of the frame 12 with respect to the building 2 can be effectively improved.

The upper support position SP5 may be arranged at a substantially central portion 15d located at a substantially midpoint on the upper long side of the frame 12. As a result, each support position SP with respect to the frame 12 can be set symmetrically, and the component forces of the loads input from the corner portions C1 and C4 of the frame 12 are balanced in the substantially central portion 15d, and have good load bearing capacity. Therefore, the net support structure 1 can be mounted in a well-balanced manner.

FIG. 8 is another modification of FIG. In the modified example shown in FIG. 8, the frame 12 is directly supported by the anchor 22 without the support member 30. Even in this case, the support positions SP1 to SP4 by the anchor 22 are configured to be separated from the load support points LP1 to LP4 of the frame 12, so that a part of the load input from the load support points LP1 to LP4 is partly distributed to the frame 12. The load acting on the anchor 22 can be reduced.

FIG. 9 is another modification of FIG. In the modified example shown in FIG. 9, the frame 12 is supported by the anchor 22 via the support member 30, except that the support member 30 is composed of only the base plate 32. That is, as compared with FIG. 5, since the support member 30 does not have the connecting member 34, the frame 12 is directly connected to the base plate 32 fixed to the building 2 by the anchor 22. Even in this case, the support positions SP1 to SP4 by the anchor 22 are configured to be separated from the load support points LP1 to LP4 of the frame 12, so that a part of the load input from the load support points LP1 to LP4 is partly distributed to the frame 12. The load acting on the anchor 22 can be reduced.

FIG. 10 is a cross-sectional view taken along the line PP of FIG. In this modification, as shown in FIG. 10, a load reduction structure 40 may be provided between the frame 12 and the base plate 32 in order to reduce the load acting on the anchor 22 from the frame 12. The load-reducing structure 40 has a first convex portion 42 that protrudes toward the base plate 32 side from the surface of the frame 12 that faces the base plate 32, and a first convex portion 42 that protrudes from the surface of the base plate 32 that faces the frame 12 toward the frame 12. A spring member 46 provided along the in-plane direction is provided between the second convex portion 44 and the second convex portion 44. As a result, the load input to the frame 12 is reduced by the spring member 46 when a part of the load is shared by the frame 12 itself and then transmitted to the base plate 32.

FIG. 11 is a modification of FIG. 10. In this modification, as the load reduction structure 40, an elongated hole 47 provided on a surface of the frame 12 facing the base plate 32 and an elongated hole 47 extending from the base plate 32 toward the frame 12 and the tip thereof being inserted into the elongated hole 47. It is provided with an extending portion 49 that can be fixed with a nut 48 from the frame 12 side. The elongated hole 47 has a wider opening area than the extending portion 49, and the extending portion 49 is configured to be movable within the range of the elongated hole 47 while its tip is fixed by a nut 48. As a result, the load input to the frame 12 is reduced by the load reduction structure 40 when a part of the load is shared by the frame 12 itself and then transmitted to the base plate 32.

In the net support structure 1 of the above embodiment, the case where the frame 12 is attached so as to be located on the outer wall surface 4a side of the building 2 is illustrated, but the frame 12 is located on the inner wall surface 4b side of the building 2. It may be mounted, or the frame 12 may be mounted so as to be located inside the opening 8 of the building 2.

Subsequently, a method of attaching the net support structure 1 having the above configuration will be described. FIG. 12 is a flowchart showing a method of attaching the net support structure 1 according to at least one embodiment of the present disclosure for each process.

First, a frame 12 constituting the net support structure 1 is prepared, and a net (not shown) is attached to the frame 12 (step S1). The method of attaching the net to the frame 12 may be arbitrary. For example, by attaching the attachment wire W to the net as described above and fixing the wire W to the load support points LP1 to LP4 set on the frame 12. Will be done. The net attachment work to the frame 12 in step S1 is performed at a point away from the site where the net support structure 1 attachment work is performed (that is, the place where the building 2 is located) (for example, a factory away from the site). Will be done at).

Subsequently, the support member 30 is fixed to the building 2 to which the net support structure 1 is attached by the anchor 22 (step S2). In step S2, first, the support positions SP1 to SP4 described above are determined on the building 2 side, and the support member 30 is fixed to each support position SP1 to SP4 with the anchor 22. At this time, one end of the support member 30 is fixed to the building 2 by the anchor 22, while the other end of the support member 30 is in an open state.

In step S2, when the support member 30 includes the base plate 32 and the connecting member 34, the support member 30 is completed in advance by combining the base plate 32 and the connecting member 34, and then the completed support is completed. The member 30 may be fixed by the anchor 22, or only the base plate 32 of the support members 30 is fixed to the building 2 by the anchor 22, and the connecting member 34 is further fixed to the base plate 32 fixed by the anchor 22. It may be. Further, as shown in FIG. 9, when the support member 30 is composed of only the base plate 32, in step S2, only the base plate 32 may be fixed by the anchor 22.

Although FIG. 12 illustrates a case where step S2 is performed after step S1, step S2 may be performed before step S1 or steps S1 and S2 may be performed at the same time.

Subsequently, the frame 12 to which the net is attached is conveyed to the site in step S1 (step S3), and attached to the support member 30 fixed by the anchor 22 in step S2 (step S4). At this time, the load support points LP1 to LP4 have already been determined in step S1, and the support positions SP1 to SP4 have already been determined in step S2. Therefore, in step S4, the support positions SP1 to SP4 support the load by combining the two. The net support structure 1 having the above configuration separated from the points LP1 to LP4 can be easily completed.

As described above, according to the above mounting method, the net support structure 1 is assembled at the site by individually performing the net mounting work to the frame 12 and the fixing work of the support member 30 to the building 2 in advance. The work can be facilitated. As a result, the work load on the site is reduced, and the net support structure 1 can be attached to the building 2 in a short construction period.

In addition, it is possible to replace the components in the above-described embodiments with well-known components as appropriate without departing from the spirit of the present disclosure, and the above-described embodiments may be combined as appropriate.

The contents described in each of the above embodiments are grasped as follows, for example.

(1) The net support structure according to some embodiments of the present disclosure (for example, the net support structure 1 of the above embodiment) is
A frame (for example, the frame 12 of the above embodiment) capable of supporting a net for covering an opening (for example, the opening 8 of the above embodiment) of a building (for example, the building 2 of the above embodiment)
Anchors for fixing the frame to the building (for example, the anchor 22 of the above embodiment) and
With
The anchor attaches the frame to the building at a support position (for example, support positions SP1 to SP4 of the above embodiment) away from the load support point of the net in the frame (for example, the load support points LP1 to LP4 of the above embodiment). Fix it.

According to the aspect (1) above, the support position by the anchor of the frame is set away from the load support point of the net in the frame. As a result, a part of the load input from the load support point when the net receives the flying object is shared by the frame, and the load acting on the anchor is reduced. As a result, the anchor for fixing the frame to the building can be simplified.

(2) In some embodiments, in the aspect of (1) above,
The frame has a rectangular shape and has a rectangular shape.
The support position is separated from the rectangular corner portion (for example, the corner portions C1 to C4 of the above embodiment).

According to the aspect (2) above, the support position by the anchor is set at a position of the frame having a rectangular shape away from the corner portion (that is, an extending portion between the adjacent corner portions of the frame). NS. As a result, when the net receives a flying object, a part of the load input from the load support point can be effectively shared by the frame.

(3) In some embodiments, in the above aspect (1) or (2),
The anchor fixes the frame via a support member (for example, the support member 30 of the above embodiment).

According to the aspect (3) above, the frame is fixed by an anchor via a support member. By interposing the support member between the frame and the anchor, the fixing position of the anchor to the building can be flexibly set without being restricted by the shape of the frame.

(4) In some embodiments, in the aspect of (3) above,
The support member includes a base plate fixed to the building by the anchor and a connecting member for connecting the base plate and the frame.

According to the aspect (4) above, by forming the support member by combining the base plate and the connecting member, the fixing position of the anchor to the building can be flexibly set.

(5) In some embodiments, in any one of the above (1) to (4),
The anchor is arranged so as to avoid the opening reinforcing bar provided in the opening (for example, the opening reinforcing bar 10 of the above embodiment).

According to the aspect (5) above, by arranging the anchors so as to avoid the opening reinforcing bars, it is possible to satisfactorily secure the building strength when the net support structure is attached to the building.

(6) In some embodiments, in any one of the above (1) to (5),
A plurality of the support positions are provided along the frame.

According to the aspect (6) above, a plurality of support positions are provided along the frame. As a result, the support span between the adjacent support positions is shortened, and the load input to the frame when the flying object is received by the net can be more effectively distributed.

(7) In some embodiments, in any one of the above (1) to (6),
The support position includes an upper support position that supports the upper part of the frame (for example, the upper support position SP5 of the above embodiment).

According to the aspect (7) above, at least the upper part of the frame is fixed by the anchor at the upper support position. As a result, the weight of the frame itself and the weight due to snowfall in the snowfall area are supported by the anchor at the upper support position, and the stability of the frame with respect to the building can be effectively improved.

(8) In some embodiments, in any one of the above (1) to (7),
The support position is arranged symmetrically with respect to the central portion of the frame (for example, the central portion O of the above embodiment).

According to the aspect (8) above, the frame is supported in a well-balanced manner with respect to the building by arranging the support positions symmetrically with respect to the central portion of the frame. As a result, the component force of the load input from each corner portion of the frame when the flying object is received by the net is balanced at the substantially central portion of each side of the frame, and good load bearing capacity can be exhibited. As a result, the load input to the frame can be more preferably distributed.

(9) In some embodiments, in any one of the above (1) to (8),
The frame extends along the edge of the opening and has an H-shaped vertical cross section in the extending direction.

According to the aspect (9) above, the rigidity of the frame can be satisfactorily secured by forming the vertical cross section of the frame in the extending direction into an H shape.

(10) In some embodiments, in the aspect of (9) above,
The H shape has a first recess (for example, the first recess 14 of the above embodiment) that opens toward the inside of the opening.
The support position is configured to support a wire attached to the net (for example, the wire W of the above embodiment) inside the first recess.

According to the aspect (10) above, the wire attached to the net is supported with respect to the frame at the support position provided inside the first recess that opens toward the inside of the opening in the H shape. As a result, when the wire is deformed by the weight of the net, it is possible to prevent a gap from being generated between the net and the frame.

(11) In some embodiments, in the above aspect (9) or (10),
The H shape has a second recess (for example, the second recess 16 of the above embodiment) that opens toward the outside of the opening.
The H-shaped steel has a lid portion (for example, the lid portion 18 of the above embodiment) that covers the second recess.

According to the aspect (11) above, good frame rigidity can be obtained by covering the second concave portion of the H shape that opens toward the outside of the opening with the lid portion.

(12) In some embodiments, in the aspect of (11) above,
The lid is provided on the upper side of the frame.

According to the aspect (12) above, by covering the second recess with the lid on the upper side of the frame, it is possible to suitably prevent foreign matter such as water from entering the second recess.

(13) In some embodiments, in any one of the above (1) to (12),
The inner peripheral side of the frame is provided on the outer wall surface of the building (for example, the outer wall surface 4a of the above embodiment) so as to correspond to the inner peripheral edge of the opening.

According to the aspect (13) above, since the inner peripheral side of the frame is attached so as to correspond to the inner peripheral edge of the opening, the frame does not interfere with the opening.

(14) In some embodiments, in any one of the above (1) to (13),
The building is a reactor building,
The net is a protective net for preventing flying objects from entering the inside of the reactor building through the opening.

According to the aspect (14) above, by attaching a protective net to the opening of the reactor building by the above-mentioned net support structure, the equipment inside the reactor building is suitable against flying objects from the outside. Can be protected.

(15) The method of attaching the net support structure (for example, the net support structure 1 of the above embodiment) according to some embodiments of the present disclosure is as follows.
A frame (for example, the frame 12 of the above embodiment) capable of supporting a net for covering an opening (for example, the opening 8 of the above embodiment) of a building (for example, the building 2 of the above embodiment)
An anchor for fixing the frame to the building via a support member (for example, the support member 30 of the above embodiment) and an anchor (for example, the anchor 22 of the above embodiment).
With
The anchor attaches the frame to the building at a support position (for example, support positions SP1 to SP4 of the above embodiment) away from the load support point of the net in the frame (for example, the load support points LP1 to LP4 of the above embodiment). It is a method of attaching a net support structure that is fixed.
A step of attaching the net to the frame (for example, step S1 of the above embodiment) and
A step of fixing the support member to the building with the anchor (for example, step S2 of the above embodiment) and
A step of transporting the frame to which the net is attached and attaching the frame to the support member fixed to the building by the anchor (for example, steps S3 and S4 of the above embodiment).
To be equipped.

According to the aspect (15) above, the work of attaching the net to the frame and the work of fixing the support member to the building using anchors are individually carried out in advance. Since the load support point is determined in the former and the support position is determined in the latter, it is possible to easily realize a configuration in which the support position is separated from the load support point when both are combined. As described above, the net support structure having the above configuration can be easily attached to the building. In addition, the net support structure is a stable net support structure with a small number of anchors because the support position is arranged away from the load support point as described above and the load from the load support point is shared by the frame. Can be realized. Therefore, the burden of fixing work by the anchor can be reduced. By attaching the net support structure to the building in this way, the work load can be reduced and the construction period can be effectively shortened.

1 Net support structure 2 Building 4 Wall 6 Space 8 Opening 10 Opening reinforcement 12 Frame 14 1st recess 16 2nd recess 18 Lid 22 Anchor 30 Support member 32 Base plate 34 Connecting member 40 Load reduction structure 42 1st convex part 44 Second convex portion 46 Spring member 47 Long hole 48 Nut 49 Extended portion C1 to C4 Corner portion LP1 to LP4 Load support points SP1 to SP5 Support position W wire

Claims (15)

A frame that can support the net to cover the opening of the building,
Anchors for fixing the frame to the building,
With
The anchor is a net support structure that fixes the frame to the building at a support position away from the load support point of the net in the frame. The frame has a rectangular shape and has a rectangular shape.
The net support structure according to claim 1, wherein the support position is separated from the rectangular corner portion. The net support structure according to claim 1 or 2, wherein the anchor fixes the frame via a support member. The net support structure according to claim 3, wherein the support member includes a base plate fixed to the building by the anchor and a connecting member for connecting the base plate and the frame. The net support structure according to any one of claims 1 to 4, wherein the anchor is arranged so as to avoid an opening reinforcing bar provided in the opening. The net support structure according to any one of claims 1 to 5, wherein a plurality of the support positions are provided along the frame. The net support structure according to any one of claims 1 to 6, wherein the support position includes an upper support position that supports the upper part of the frame. The net support structure according to any one of claims 1 to 7, wherein the support positions are arranged symmetrically with respect to the central portion of the frame. The net support structure according to any one of claims 1 to 8, wherein the frame extends along the edge of the opening and has an H-shaped vertical cross section in the extending direction. The H shape has a first recess that opens toward the inside of the opening.
The net support structure according to claim 9, wherein the support position is configured to support a wire attached to the net inside the first recess. The H shape has a second recess that opens toward the outside of the opening.
The net support structure according to claim 9 or 10, wherein the H-section steel has a lid portion that covers the second recess. The net support structure according to claim 11, wherein the lid portion is provided on the upper side of the frame. The net support structure according to any one of claims 1 to 12, wherein the inner peripheral side of the frame is provided on the outer wall surface of the building so as to correspond to the inner peripheral edge of the opening. The building is a reactor building,
The net support structure according to any one of claims 1 to 13, wherein the net is a protective net for preventing flying objects from entering the inside of the reactor building through the opening. A frame that can support the net to cover the opening of the building,
An anchor for fixing the frame to the building via a support member,
With
The anchor is a method of attaching a net support structure for fixing the frame to the building at a support position away from the load support point of the net in the frame.
The process of attaching the net to the frame and
A step of fixing the support member to the building with the anchor,
A step of transporting the frame to which the net is attached and attaching it to the support member fixed to the building by the anchor.
A method of mounting a net support structure.

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