JP6928383B2 - Protective net upholstery structure - Google Patents

Description

The present invention relates to a protective net upholstery structure that prevents an object that may fall from above the room from falling.

Conventionally, the ceilings of most buildings other than houses and special wooden buildings are composed of "hanging ceilings", and by placing gypsum boards and lighting fixtures on the base structure that is connected to bolts and constructed in a grid pattern. It was configured as an indoor ceiling surface. However, the ceiling surface configured in this way may cause the plasterboard and lighting fixtures configured as the ceiling surface to fall in the event of a disaster such as an earthquake, and technologies such as the following publications are disclosed as means to eliminate this risk. Has been done.

For example, Patent Document 1 describes a building reinforcement device that can prevent damage to indoor dwellers due to falling objects from above during an earthquake. Specifically, the ceiling constituting the indoor space. A configuration for preventing a fall from above by arranging a metal net body at the lower part of the surface is described.

In Patent Document 2, the displacement of the members constituting the indoor ceiling at the time of an earthquake is determined by connecting the suspended ceiling to the fixed plate provided at the lower end of the column suspended from the ceiling slab via the viscoelastic material. It describes a configuration that prevents the members constituting the ceiling surface from falling by absorbing the ceiling material and restricting the movement of the ceiling material.

Japanese Unexamined Patent Publication No. 2003-120045 Japanese Unexamined Patent Publication No. 2009-167737

However, the fall prevention structure of an object from above disclosed in any of the documents does not consider, for example, the installation of the net body after the fall prevention structure is composed of a net body.

Therefore, the present invention facilitates a protective net that is attached below an object that may fall into the interior space during an earthquake, such as the ceiling of a building, lighting equipment, or a duct, to prevent the falling object from falling onto the floor surface of the room. Provide a protective net erection structure that can be erected in.

The present invention is a net stretching structure for stretching a protective net 12 below an object that may fall into a room at the time of an earthquake, and the net stretching structure is characterized by having the following configuration. Net upholstery structure. That is, the protective net tensioning structure includes an annular wire threading metal fitting 7 connected to the lower end of the bolt 6 attached to the reinforced concrete surface 2, a connecting joint wire 11, and a connecting metal fitting provided at the end of the connecting joint wire 11. It is composed of a net support wire unit W composed of 8 and a net mounting wire 9 connected to the connecting metal fitting 8, and the net supporting wire unit W is formed on both sides of the wire threading metal fitting 7 on the ring and is also composed of the net mounting wire. A protective net 12 is attached and fixed to 9 via a binding wire 13, and a design of strength calculation that can withstand the load load of falling objects in the room below the protective net 12 in the room where the protective net 12 is stretched. The net support wire unit W is stretched at a position based on the above , the connecting joint wire 11 or the end joint wire 14 is located at the intersection of the net support wire unit W, and the intersection of the net support wire unit W is a bolt. It is characterized in that it is configured so as to be continuously provided on the reinforced concrete surface 2 by 6.

Support the parts of the net mounting wire 9 and the protective net 12 that match the strength calculation design that can withstand the load of falling objects with bolts 6, and properly correct the ends and overlapping parts of the protective net 12 with the end joint wire 14. It is also characterized in that the protective net 12 is bound to the net attachment wire 9 via the binding wire 13 of each required means.

The wire threading metal fitting 7 is also characterized in that it is connected to one end of the turnbuckle 10 via the connecting metal fitting 8 and the other end of the turnbuckle 10 is connected to the net mounting wire 9 via the connecting metal fitting 8.

It is a net laying structure for laying a protective net 12 under an object that may fall into the room at the time of an earthquake, and the protective net laying structure is continuously installed at the lower end of a bolt 6 attached to the reinforced concrete surface 2. A net support wire unit W composed of an annular wire threading metal fitting 7, a connecting joint wire 11, a connecting metal fitting 8 provided at an end of the connecting joint wire 11, and a net mounting wire 9 connected to the connecting metal fitting 8. The net support wire unit W is configured on both sides of the wire threading metal fitting 7 on the ring, and the protective net 12 is attached and fixed to the net attaching wire 9 via the binding wire 13, and the protective net 12 is further attached. In the room where the net support wire unit W is installed, the net support wire unit W is installed below the protective net 12 at a position based on the design of the strength calculation that can withstand the load load of the falling objects in the room, and the net support wire unit W intersects. Since the connecting joint wire 11 or the end joint wire 14 is located in the portion and the intersecting portion of the net support wire unit W is connected to the reinforced concrete surface 2 by the bolt 6, the ring of the connecting joint wire 11 is formed. By adjusting the portion, it is possible to easily adjust the tension and relaxation of the net mounting wire 9, and further, it is possible to easily stretch the protective net 12 in conjunction with the stretching of the net mounting wire 9. Further, since the protective net 12 is not provided with a heavy object or a special structure for stretching, it is possible to prevent an object from falling from above in a short construction period and at low cost. In particular, the net support wire unit W can support the protective net 12 from below so as to sufficiently withstand the heavy load of a falling object, and can prevent the risk of the protective net 12 falling due to insufficient strength.

Further, the protective net 12 supports the portion of the net mounting wire 9 according to the design of the strength calculation with the bolt 6, and the end portion and the overlapping portion of the protective net 12 are appropriately corrected by the end joint wire 14, respectively. If the protective net 12 is bound to the net mounting wire 9 via the binding wire 13 of the required means, the tension of the protective net 12 is relaxed by adjusting the tensile force of the net mounting wire 9 and the end joint wire 14. Can be easily changed. In addition, it is possible to reliably receive the falling object from above after supporting the part corresponding to the strength design when receiving the falling object with the bolt 6 and expanding the area for receiving the falling object of the protective net 12 as much as possible. can.

Further, if the wire threading metal fitting 7 is connected to one end of the turnbuckle 10 via the connecting metal fitting 8 and the other end of the turnbuckle 10 is connected to the net mounting wire 9 via the connecting metal fitting 8, it is reliable. The net mounting wire 9 can be connected and fixed to. Further, since the net mounting wire 9 is fixed to the wire threading metal fitting 7 via the turnbuckle 10, the tensile force applied to the net mounting wire 9 is easily adjusted by the turnbuckle 10 and connected to the net mounting wire 9. The protective net 12 can be put into an appropriate tension state.

It is a perspective view which shows the protection net tensioning structure in embodiment of this invention. It is a side view which shows the protection net tensioning structure in embodiment of this invention. It is a side view which shows the state which installed the protective net tensioning structure in embodiment of this invention on the reinforced concrete surface of the top surface. It is a side view which shows the protection net tension structure in the vicinity of the wall surface concrete in the protection net tension structure of embodiment of this invention. It is a side view which shows the state which the bolt was hung from the reinforced concrete surface of the top surface by the bolt fixing tool, and the net attachment wire was stretched in the protection net tensioning structure of embodiment of this invention. It is a side view which shows the state which fixed the bolt to the structural steel material and stretched the protective net in the protective net stretching structure of embodiment of this invention. It is a side view which shows the state which installed the wire threading metal fitting in the H type structural steel material in the protection net tensioning structure of embodiment of this invention. It is a side view which shows the state which fixed the bolt to the C-shaped structural steel material, and stretched the protective net in the protective net stretched structure of embodiment of this invention. It is a side view which shows the state which installed the wire threading metal fitting in the pipe truss in the protection net tensioning structure of embodiment of this invention. It is a side view which shows the state which connected the net attachment wire to the wall surface concrete without passing through the end joint wire in the protection net tensioning structure of embodiment of this invention. It is a side view which shows the state in which the protective net is stretched with a plurality of post-installed anchors embedded in the wall concrete in the protective net stretching structure of the embodiment of the present invention. It is a top view which shows the protection net tensioning structure of embodiment of this invention. It is a side view which shows the state which used the turnbuckle in the protection net tensioning structure of embodiment of this invention.

The present invention is a net stretching structure for stretching a protective net 12 below an object that may fall into a room at the time of an earthquake, and the protective net stretching structure is a bolt 6 attached to a reinforced concrete surface 2. A net support wire composed of an annular wire threading metal fitting 7 connected to the lower end, a connecting joint wire 11, a connecting metal fitting 8 provided at the end of the connecting joint wire 11, and a net mounting wire 9 connected to the connecting metal fitting 8. The net support wire unit W is composed of the unit W, and is configured on both sides of the wire threading metal fitting 7 on the ring, and the protective net 12 is attached and fixed to the net attachment wire 9 via the binding wire 13 of the required means. Moreover, in the room where the protective net 12 is installed, the net support wire unit W is placed below the protective net 12 at a position based on the design of the strength calculation that can withstand the load load of the falling objects in the room, if necessary. It is stretched in a grid pattern, and the connecting joint wire 11 or the end joint wire 14 is located at the intersection of the net support wire unit W, and the intersection of the net support wire unit W is placed on the upper reinforced concrete surface 2 by the bolt 6 by the bolt 6. The protective net 12 is configured to be continuously provided, and the protective net 12 is attached at a position matching the design of the strength calculation of the net mounting wire 9 by aligning the corners with the net mounting wire 9, and the end portion and the overlapping portion of the protective net 12 are attached. The gist is that the protective net 12 is bound to the net mounting wire 9 via the binding wire 13 of the required means, respectively, by performing appropriate correction with the end joint wire 14.
That is, the gist of the present invention is the support structure of the protective net 12 stretched below the ceiling surface 1a in the room, and the basic net support structure has the following structure.
(1) An annular wire threading metal fitting 7 connected to the lower end of the bolt 6 attached to the reinforced concrete surface 2 and
(2) The net support wire unit W is composed of a connecting joint wire 11, a connecting metal fitting 8 provided at the end of the connecting joint wire 11, and a net mounting wire 9 connected to the connecting metal fitting 8. Is configured on both sides of the wire threading bracket 7 on the annulus.
(3) The connecting joint wire 11 or the end joint wire 14 is located at the intersection of the net support wire unit W.
( 4 ) Both ends of the wire unit W are connected and fixed to the wall concrete 2'in the facing room via a post-construction anchor-4, so that the net support wire unit W is stretched between the wall concrete 2'in the facing room. Set up
( 5 ) By integrally binding the net support wire unit W and the protective net 12 at a predetermined position by the binding wire 13 of the required means.
( 6 ) The protective net 12 is supported from below by the net support wire unit W.
In such a protective net support structure, the structure of the net support wire unit W consists of a connecting joint wire 11 in which both ends are folded back to form an annulus portion 11a and a single through wire in the center, and the left and right sides of the connecting joint wire 11. An annular connecting metal fitting 8 is connected to the annular portion 11a of the above, and an annular portion 14a of the end joint wire 14 formed on the annular portion 11a by folding back one end is further provided on the left and right sides of the annular connecting metal fitting 8. The other end of the end joint wire 14 is folded back to form an annular portion 11a and connected to the annular connecting metal fitting 8, and the annular connecting metal fitting 8 attaches the post-installed anchor 4 to the wall concrete 2'in the facing room. It consists of a structure in which the wires are fixed in series.

In the space between the facing wall concretes 2'in the room, the net support wire unit W is stretched at a position below the protective net 12, and the stretching structure for supporting the protective net 12 from below is as follows.
That is, a square net support framework S is formed by stretching between the facing wall concretes 2'in the room so as to be located below the vicinity of the four sides of the protective net 12, and the inside of the square net support framework S. In the above, the intermediate net support wire unit W1 in the vertical direction and the horizontal direction is further stretched in a crossed manner, and the position of this intersection is set as the position calculated by the design of the strength calculation when the protective net 12 is passively dropped. Attach the protective net 12 to the net support wire unit W with its corners aligned.

In the rectangular net support framework S, the intermediate net support wire unit W1 stretched in the vertical direction and the horizontal direction is adjacent to the intermediate net support wire unit W1 so as to match the position calculated by the design of the strength calculation. It is stretched while keeping the interval between.
The intersecting portion of the intermediate net support wire unit W1 stretched in the vertical direction and the horizontal direction is hung by the wire threading metal fitting 7 at the lower end of the bolt 6.
The wire threading metal fitting 7 is in a state in which the connecting joint wire 11 in the intermediate net support wire unit W1 is inserted and suspended.
In this way, below the protective net 12, the intersecting portion of the intermediate net support wire unit W1 stretched in the vertical or horizontal direction is suspended by the wire threading metal fitting 7 at the lower end of the bolt 6 to support the protective net 12 from below. Since the intermediate net support wire unit W1 is suspended by the wire threading metal fitting 7 at the lower end of the bolt 6 at the position based on the strength calculation design, the protective net 12 can be sufficiently supported and the protective net 12 is dropped. It can maintain the net support strength that can withstand the load of an object.

When the bolt 6 is vertically installed from the reinforced concrete surface 2 on the top surface provided above the ceiling surface 1a, the bolt 6 is vertically installed on the steel material 3 of the H-shaped steel as the attic steel frame via the bolt suspension mechanism 21. As shown in FIGS. It was composed of a substantially L-shaped connecting tool 20 fitted and fixed to the portion, and a substantially L-shaped bolt fixing tool 19 joined to the tip surface of the connecting tool 20 and screwed to the upper end portion of the bolt 6.

Specific embodiments of the present invention will be described in detail with reference to FIGS. 1 to 13.
1 to 13 are drawings showing the whole, portion, and waist portion showing the protective net stretching structure according to the embodiment of the present invention.

The protective net upholstery structure 100 of the present invention includes a reinforced concrete surface 2 constituting the wall surface and the top surface of a building, a ceiling surface 1a of an indoor space provided below the reinforced concrete surface 2 of the top surface, and a reinforced concrete surface of the top surface. A ring formed by folding back a bolt 6 suspended in 2 and a wire threading metal fitting 7 connected to the lower end of the bolt 6 and a connecting joint wire 11 or a connecting joint wire 11 arranged on both sides of the wire threading metal fitting 7. A net support wire unit W composed of a net mounting wire 9 or the like connected to the annular portion 11a via a portion 11a or a connecting metal fitting 8, an annular binding wire 13 connected to the net mounting wire 9, and a binding wire 13 are used. It is composed of a protective net 12 attached to the vehicle.
Moreover, in the room where the protective net 12 is stretched, the net support wire unit W is arranged in a grid pattern as necessary below the protective net 12 at a position based on the design of strength calculation that can withstand the load load of falling objects in the room. The crossing portion of the net support wire unit W is connected to the reinforced concrete surface 2 by the bolt 6.

The building is composed of a steel material 3 as a frame, and a reinforced concrete surface 2 on the top surface and a wall surface concrete 2'are formed by reinforced concrete along the steel material 3. As shown in FIGS. 6, 7 and 8, the steel material 3 is composed of an H-shaped steel, a C-shaped steel, and a pipe truss. In the steel material 3, a bolt 6 is vertically hung on the lower surface, a field edge receiver is connected to the lower end of the bolt 6, and a field edge is connected to the lower surface of the field edge receiver in a direction orthogonal to the field edge receiver. It is constructed in a plane visual grid shape with the field edge.

The ceiling surface 1a is connected and fixed to the lower surface of the field edge with screws or the like. The ceiling surface 1a has substantially the same shape as the reinforced concrete surface 2 on the top surface. It is desirable that the ceiling surface 1a is made of a member that is as light as possible so that the ceiling surface 1a does not fall due to the weight of the constituent members, and is made of, for example, gypsum board.

A plurality of holes 2a are bored in the reinforced concrete surface 2 on the top surface, and a cylindrical post-installed anchor 4 is embedded in the holes 2a. The post-installed anchor 4 is composed of a female screw whose inner peripheral surface is spirally threaded, and as shown in FIG. 2, a bolt having a male screw structure in which one end is spirally threaded. 6 is screwed.

Further, on the ceiling surface 1a, holes 1d having substantially the same diameter as the holes 2a are formed at positions facing the holes 2a formed in the reinforced concrete surface 2 on the top surface. A bolt 6 suspended from the reinforced concrete surface 2 on the top surface is inserted into the hole 1d formed in the ceiling surface 1a. Further, a wire threading metal fitting 7 is connected to the other end of the bolt 6.
In FIG. 2, the bolt 6 is embedded in the reinforced concrete surface 2 on the top surface and then screwed into the construction anchor 4. However, the bolt 6 is not limited to this fixed form, and is shown in FIGS. As shown, the steel material 3 formed as the skeleton of the building may be vertically installed via the bolt suspension mechanism 21. As shown in FIGS. The tools 18 are integrally provided, and the head of the bolt 6 is screwed to the bolt connector 18 to vertically suspend the bolt 6.
Further, as shown in FIG. 9, the bolt 6 may be vertically installed on a cylindrical steel material 3 provided on the reinforced concrete surface 2 on the top surface.

As shown in FIGS. 2 and 5, the wire threading metal fitting 7 includes a metal ring portion 7a configured in an annular shape, and the metal ring portion 7a is connected to a connecting joint wire 11, a net mounting wire 9, and an end portion. A net support wire unit W composed of a joint wire 14, a connecting metal fitting 8, and the like is inserted.
That is, on both sides of the annular wire threading metal fitting 7, a net support wire unit W composed of a connecting joint wire 11, a net mounting wire 9, an end joint wire 14, a connecting metal fitting 8, and the like is arranged.

As shown in FIG. 2, the connecting joint wire 11 has a structure in which a plurality of metal wires are twisted and bundled, and both ends thereof are folded back to form a circular ring portion 11a. The annular portion 11a is connected to the annular connecting metal fitting 8, and is connected to the net mounting wire 9 via the connecting metal fitting 8.

As shown in FIGS. 4 and 12, the net mounting wire 9 is configured as one wire by twisting and bundling a plurality of metal wires in the same manner as the connecting joint wire 11. Further, the net mounting wires 9 are formed in a grid pattern at regular intervals, one end of which is connected to the connecting metal fitting 8, and the other end of the wall concrete 2'via the end joint wire 14. It is connected.
In the wall surface concrete 2', holes 2b are bored at a plurality of places as in the case of the reinforced concrete surface 2 of the ceiling, and post-installed anchors 4 are embedded in the holes 2b. An eyebolt 17 having an annular connecting portion is screwed into the post-installed anchor 4, and the annular portions 14a formed at both ends of the end joint wire 14 are engaged with the annular connecting portion of the eyebolt 17. doing. With such a configuration, the net mounting wire 9 can be reliably fixed to the wall surface concrete 2'.
Further, as shown in FIG. 3, the net mounting wire 9 is a wire threading metal fitting in which a bolt 6 is vertically installed on the lower surface of the reinforced concrete surface 2 on the top surface near the connecting portion with the wall surface concrete 2'and connected to the tip of the bolt 6. The metal ring portion 7a of 7 may be connected and fixed by engaging the ring portion 14a of the end joint wire 14.
Further, as shown in FIG. 5, in the net mounting wire 9, a hole 2a is formed in the side surface of the reinforced concrete surface 2 on the top surface, a post-installed anchor 4 is embedded in the hole 2a, and the post-installed anchor 4 is used. The bolt 6 is vertically hung via a bolted substantially L-shaped bolt fixture 19, and the ring portion 14a of the end joint wire 14 is attached to the metal ring portion 7a of the wire threading metal fitting 7 connected to the tip of the bolt 6. May be connected and fixed by engaging.
Further, as shown in FIG. 10, other connecting structures of the net mounting wire 9 to the wall surface concrete 2 ′ include a configuration in which the net mounting wire 9 is connected to the connecting portion of the eyebolt 17 installed on the wall surface concrete 2 ′ via the connecting metal fitting 8. As shown in FIG. 11, even if the wall concrete 2'is configured to be connected and fixed to the fixing tool 22 provided with a substantially U-shaped connecting portion via the connecting metal fitting 8 to the connecting portion of the fixing tool 19. good.

Further, in the room where the protective net 12 is stretched, the net support wire unit W is arranged in a grid shape as necessary below the protective net 12 at a position based on the design of the strength calculation that can withstand the load load of the falling object in the room. It is characterized in that the intersecting portion of the net support wire unit W is suspended from the upper reinforced concrete surface 2 by a bolt 6 and is attached to the net constituting the net support wire unit W. The wire 9 is connected to the terminal portion of the protective net 12 formed in a substantially rectangular shape in a plan view by a binding wire 13, and the state change of the net mounting wire 9 and the state change of the protective net 12 are linked. For example, when the net attachment wire 9 is in a tense state, the protective net 12 is also in a tense state, and when the net attachment wire 9 is in a relaxed state, the protective net 12 is also in a relaxed state.
Further, as shown in FIG. 2, the net mounting wire 9 is connected to the connecting joint wire 11 via the connecting metal fitting 8, and is connected by the total circumference length of the annular portions 11a at both ends of the connecting joint wire 11. The total length of the wire 11 can be adjusted. Therefore, if the entire circumference of the annular portion 11a of the connecting joint wire 11 is lengthened, the total length of the connecting joint wire 11 is shortened, and the net mounting wire 9 can be in a tense state and the protective net 12 can be in a tense state.
Further, if the total peripheral length of the annular portions 11a at both ends of the connecting joint wire 11 is shortened, the total length of the connecting joint wire 11 becomes longer, the net mounting wire 9 is in a relaxed state, and the protective net 12 is also in a relaxed state. ..

Further, the protective net 12 is connected and fixed to the net attachment wire 9 by a binding wire 13 as a required means. The binding wire 13 is a string made of stainless steel, and can be connected and fixed by surrounding the outer circumference of the net attachment wire 9 and the protective net 12 with the binding wire 13 in a bundled state. As for the binding wire 13, the protective net 12 is fixed to the net mounting wire 9, and it is sufficient that the tension-relaxed state of the net mounting wire 9 and the tension-relaxed state thereof can be adjusted in conjunction with each other. ..
The material of the binding wire 13 is not limited to stainless steel, and any material may be used as long as the binding wire 13 is cut and the protective net 12 does not fall downward when a load is applied to the protective net 12, for example. , May be composed of blunt iron wire.

As described above, the protective net tensioning structure 100 is configured by embedding the post-installed anchor 4 in the reinforced concrete surface 2 on the top surface and screwing the bolt 6 into the post-installed anchor 4, so that the bolt 6 is located at the lower end of the bolt 6. By inserting the inside of the provided wire threading metal fitting 7, the central portion of the connecting joint wire 11 of the net support wire unit W arranged on the left and right sides of the wire threading metal fitting 7 can be easily supported. Further, in this configuration, the support strength can be changed according to the number of holes 2a formed in the reinforced concrete surface 2 on the top surface. That is, the post-installed anchor 4 is embedded in the reinforced concrete surface 2 according to the number of holes 2a drilled in the reinforced concrete surface 2 on the top surface, and the bolt 6 is screwed into the post-installed anchor 4. As the number of holes 2a increases, the number of wire threading metal fittings 7 provided at the lower end of the bolt 6 also increases, and the number of places supporting the connecting joint wire 11 through which the wire threading metal fittings 7 is inserted increases, so that the net can be attached. The strength to support the wire 9 is improved.
The wire threading metal fitting 7 not only supports the connecting joint wire 11, but also inserts the net mounting wire 9 to directly support the net mounting wire 9, and is a support mechanism when a tensile force is generated in the protective net 12. It may be arranged to function as.

Further, the end of the net mounting wire 9 is connected to the connecting joint wire 11 via the connecting metal fitting 8, and the net mounting wire 9 is stretched by adjusting the length of the annular portion 11a of the connecting joint wire 11. The degree can be adjusted as appropriate. That is, when the tensile force is insufficient, the tensile force of the net attachment wire 9 is increased by increasing the annular shape of the annular portion 11a and shortening the total length of the connecting joint wire 11. When the tensile force is excessive, the tensile force of the net attachment wire 9 is reduced by reducing the annular shape of the annular portion 11a and increasing the total length of the connecting joint wire 11.
Therefore, in the protective net tensioning structure 100, the ceiling is adjusted by adjusting the number of bolts 6 suspended on the reinforced concrete surface 2 on the top surface, the number of connecting joint wires 11, and the total circumference of the annular portion 11a of the connecting joint wires 11. The protective net 12 provided below the surface 1a can be installed so as to have an appropriate tensile state and tensile strength.

Further, as another method of adjusting the tensile force of the net mounting wire 9, the turnbuckle 10 may be used in combination with the connecting joint wire 11.
The turnbuckle 10 is configured by screwing an eyebolt 10b to both ends of a turnbuckle main body 10a for tensioning and the turnbuckle main body 10a.
As shown in FIG. 13, one end of the turnbuckle body 10a is connected and fixed to the wire threading metal fitting 7 connected to the lower end of the bolt 6 via the connecting metal fitting 8, and the other end is connected and fixed to the net mounting wire 9 with the connecting metal fitting 8 It is connected via.

With this configuration, when the tensile force of the protective net 12 is insufficient, the turnbuckle body 10a connected to the wire threading metal fitting 7 is rotated in the direction in which the eyebolt 10b screwed into the turnbuckle body 10a is tightened. A tensile force can be applied to the net attachment wire 9 to cause a predetermined tension in the protective net 12.
When the tensile force of the protective net 12 is excessive, the turnbuckle body 10a connected to the wire threading metal fitting 7 is rotated in the direction in which the eyebolt 10b screwed into the turnbuckle body 10a loosens to pull the net mounting wire 9. The force can be reduced so that the protective net 12 has a predetermined tension.

As described above, by installing the turnbuckle 10 between the wire threading metal fitting 7 and the net mounting wire 9, the entire circumference of the annular portion 11a of the connecting joint wire 11 can be adjusted to form the net mounting wire 9. By adjusting the tensile force and using the turnbuckle 10 as an auxiliary, it is easy to finely adjust the tensile force applied to the protective net 12 to give a predetermined tension to the protective net 12. Further, when the tension of the turnbuckle 10 is loosened, the tension of the protective net 12 can be supported by the net support wire unit W.

It should be noted that the present invention is not limited to the above-described embodiment, and is disclosed in the configurations in which the configurations disclosed in the above-described embodiments are replaced with each other or the combinations are changed, known inventions, and the above-described embodiments. It also includes configurations in which the configurations are replaced with each other or the combinations are changed. Further, the technical scope of the present invention is not limited to the above-described embodiment, but extends to the matters described in the claims and their equivalents.

S Net support framework W Net support wire unit W1 Intermediate net support Wire unit 1a Ceiling surface 1d Hole 2 Reinforced concrete surface 2'Wall surface concrete 2a, 2b Hole 3 Steel material 3d Horizontal side plate 4 Post-installed anchor 6 Bolt 7 Wire threading bracket 7a Metal circle Ring part 8 Connecting metal fitting 9 Net mounting wire 10 Turn buckle 10a Turn buckle body 10b Eyebolt 11 Connecting joint wire 11a Ring part 12 Protective net 13 Binding wire 14 End joint wire 14a Ring part 17 Eyebolt 18 Bolt connector 19 Bolt fixing Tool 20 Connector 21 Bolt suspension mechanism 22 Fixture 100 Protective net tension structure

Claims (1)

It is a net stretching structure for stretching a protective net 12 below an object that may fall into the room at the time of an earthquake, and the net stretching structure is characterized by having the following configuration. ..
That is, the protective net upholstery structure
An annular wire threading metal fitting 7 connected to the lower end of the bolt 6 attached to the reinforced concrete surface 2 and
It is composed of a connecting joint wire 11, a connecting metal fitting 8 provided at the end of the connecting joint wire 11, and a net supporting wire unit W composed of a net mounting wire 9 connected to the connecting metal fitting 8.
The net support wire unit W is configured on both sides of the wire threading metal fitting 7 on the ring, and the protective net 12 is attached and fixed to the net attachment wire 9 via the binding wire 13, and the protective net 12 is stretched. below the guard net 12 in the room to be set, stretched a net support wire unit W in a position based on the design of the interior of strength capable of withstanding a load burden falling objects calculations, the intersection of the net support wire unit W Is characterized in that the connecting joint wire 11 or the end joint wire 14 is located, and the intersecting portion of the net support wire unit W is connected to the reinforced concrete surface 2 by the bolt 6.

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