JP6561391B2 - Fail-safe ceiling structure - Google Patents

Description

  The present invention relates to a fail-safe ceiling structure in which a flexible face material (flexible face material) is stretched under a ceiling material suspended from a ceiling structure to prevent the ceiling material from falling.

A suspended ceiling of a building is configured by suspending a hanging tool from a structure such as a beam arranged behind the ceiling, and supporting a bar attached to the upper surface of the ceiling board with the lifting tool. In such a suspended ceiling, when a large earthquake occurs, the ceiling board may fall off the suspension tool together with the bar, and in some cases, there is a concern that even a fatal accident may occur.
Therefore, conventionally, a technique has been proposed in which a protective material such as a net is stretched below the ceiling plate, and the ceiling material removed from the suspension is received by the protective material to prevent the ceiling material from falling.

For example, in Patent Document 1, a suspension supported by a beam on the back of the ceiling is extended below the ceiling material, a receiving material is installed between the lower ends of the bundle material, and a net, a wire, a steel frame material, etc. A suspended ceiling structure with protective material attached is described.
In Patent Document 2, the upper end of a hanging tool is fixed to the back of the ceiling, the hanging tool is passed through a through portion formed in the ceiling material, and the lower end of the hanging tool is fixed to a frame portion that holds the net. A suspended ceiling structure is disclosed in which is installed below the ceiling material.

JP 2014-1536 A JP 2014-185507 A

However, in the above-described conventional ceiling structure, when a protective material such as a net is stretched on an existing structure, the work of fixing the suspension to the beam or the like must be performed behind the narrow ceiling. In addition, it is dangerous because an operator deposits weight on the ceiling material or works on the ceiling material. Furthermore, it was necessary to make a through-hole for passing the lifting tool through the ceiling material, and the construction was troublesome.
A problem to be solved by the present invention is a fail-safe ceiling structure that does not require processing of the ceiling material or work on the back of the ceiling, and can easily install a flexible face material to prevent the ceiling material from falling. Is to provide.

The invention according to claim 1 is a fail-safe ceiling structure in which a ceiling material is suspended from a structure behind the ceiling and a flexible face material is stretched below the ceiling, and both ends of a plurality of wires arranged at intervals. Are attached along the wall surface below the both sides of the ceiling, and the flexible face material is supported by these wires supported only on the wall surfaces on both sides, and both ends of the wire are in the beam direction of the building on the wall surface. It is attached to a piece member mounted on a long rail member fixed oppositely or fixed oppositely in the spar direction, and the rail member is a grooved member with a lip between the upper and lower lips. The above-mentioned piece member is basically a rectangular parallelepiped whose basic front view viewed from the direction in which the rail members face each other is basically a rectangle, The dimension of the short side of the shape is smaller than the width dimension of the slit in the rail member, the dimension of the long side is slightly larger than the internal dimension of the upper and lower flanges of the rail member, and the dimension of the rectangular parallelepiped in the depth direction is It is smaller than the depth dimension of the inner space of the rail member, and further, at least one of the four corner ridges extending in the depth direction of the rectangular parallelepiped is chamfered. The rail member is horizontally fitted into the inner space of the rail member from the slit of the rail member, adjusted in the longitudinal direction of the rail member, and then rotated around the axis in the opposite direction at a predetermined location. This is a fail-safe ceiling structure characterized by being fixed inside.
According to a second aspect of the present invention, the wire is attached to the piece member by engaging a hook with a gate-type engaging portion provided in the piece member, and the engaging portion includes the piece member. 2. The fail-safe ceiling structure according to claim 1, wherein the fail-safe ceiling structure is disposed on the piece member so as to be horizontal in a state in which the rail member is rotated and fixed inside the rail member.
The invention according to claim 3 is characterized in that the wire is attached to the wall surface via a turnbuckle and a damper having an elastic body or a biasing member that absorbs fluctuations in external force applied to the wire. Or it is the fail safe ceiling structure of 2.
The invention according to claim 4 is the fail-safe ceiling structure according to any one of claims 1 to 3, wherein the flexible face material is a net.
The invention according to claim 5 is the fail-safe ceiling structure according to claim 4, wherein the net is formed by knitting stainless fine wires, and the wires are knitted.
The invention according to claim 6 is characterized in that the damper is provided with a small window for observing the amount of contraction of the elastic material or the biasing means and a mark indicating the standard amount of contraction. It is a ceiling structure.
As another invention, the following may be used.
The present invention relates to a fail-safe ceiling structure in which a ceiling material is suspended from a structure behind the ceiling, and a flexible surface material such as a net is stretched below the ceiling material, and a plurality of wires are spaced in the beam direction or the girder direction. These two ends are respectively attached along the wall surfaces on both sides of the building below the ceiling material, and the flexible face material is supported by the plurality of wires supported only on the wall surfaces on both sides. Features.
For fixing the wire along the wall of the building, it is preferable to use a turnbuckle for tensioning the wire and a damper that absorbs fluctuations in external force applied to the wire.
In addition, although fail safe is expected to be sufficiently safe for the structure in which the ceiling material is suspended, it is still assumed that the ceiling material may fall and minimize the damage that occurs at that time It means that.
The term “attached along the wall surface of the building” includes not only the attachment to the wall surface of the building but also the case of attachment to the surface of the trunk edge or the column in the case of a steel structure.

  The present invention is characterized in that the flexible surface material such as the net disposed on the lower surface side of the ceiling material as described above is supported by the wire stretched between the wall surfaces of the building. The attachment may be either a direct method of attaching to an anchor metal such as an eye bolt or a hook bolt driven into a wall surface of a building, or an indirect method of attaching to a long attachment member fixed in advance to the wall surfaces on both sides. However, it must be able to withstand the weight of the flexible face material and the tension of the wire. The long mounting member is an angle mold material, a ribbed groove mold material (rail member), or the like.

When the rail member is used, a piece member that can be moved and fixed along the rail member is used, and the end of the wire may be attached to the piece member.
The flexible face material is not limited to a net, but is a fabric, a thick resin film sheet, or the like, and a ceiling that may cause impact, weight, or damage due to falling of the ceiling material assumed when the ceiling is destroyed. It must be able to catch the size of the shards (depending on the material).

According to the present invention, when a flexible face material is stretched below the ceiling material, it is not necessary to work in a narrow ceiling space and it is not necessary to process the ceiling material, so that the construction is easy.
When attaching the end of the wire to the wall on both sides of the building, if you use a turnbuckle, you can tension the wire with the turnbuckle, so you can stretch the flexible face material so that it does not loosen greatly Excellent aesthetics. In addition, when a damper is interposed, fluctuations in external force applied to the wire are absorbed, so the wire and flexible face material will break due to the vibration of the flexible face material due to an earthquake and the impact from the flexible face material due to falling objects. Can be prevented.
As described above, the attachment of both ends of the wire includes the direct method of attaching to the anchor hardware driven into the wall of the building and the indirect method of using the rail member. However, in the indirect method of using the rail member, the position of the wire and the wire Easy to adjust the spacing.

The perspective view of the structure A which fractures | ruptures and shows it. Sectional drawing of the principal part of the building shown typically. A top view showing the state where a net was stretched (example 1). The perspective view which showed the attachment state of the 1st rail member and a net | network. The partial cross section figure (after length adjustment) which showed the connection structure of a wire and a turnbuckle, and the structure of a turnbuckle. The front view which disassembled and showed the turnbuckle (partial cross section). The partial cross section figure (before length adjustment) which showed the connection structure of a wire and a turnbuckle, and the structure of a turnbuckle. It is a front view which shows the fixed state of the piece member with respect to a 1st rail member, [A] is at the time of insertion, (B) is at the time of fixation. [A] is a perspective view of a state in which a turnbuckle is engaged with a piece member, and [B] is a reference perspective view showing another example. The steps of net installation work are shown, [A] is the first step, [B] is the second step, and [C] is the third step. The perspective view which showed the attachment state of a 2nd rail member and a net, [A] is before a net engagement, [B] is after a net engagement. The top view which showed the state which pulled the net | network to one side. A top view showing the state where a net was stretched (example 2). The perspective view which showed the anchor part. The perspective view which showed the opening part for work (Example 3). The top view which shows the net | network provided with the opening part in the stretched state. The top view of a part shown in the state which stretched the net (Example 4). Partial sectional drawing (Before length adjustment) which showed the connection structure of a wire and a turnbuckle, and the structure of a turnbuckle (Example 5). The partial cross section figure which showed the other example of the turnbuckle. The front view which showed the principal part of the other example of a turnbuckle.

Embodiments of the present invention will be described below with reference to the drawings.
Example 1 is a fail-safe ceiling structure (FIGS. 1 and 2) employed in a building A having a pillar / beam structure with a large span such as a gymnasium. In addition, the fail-safe ceiling structure of the present invention is not only such a large-area ceiling, but also a ceiling of a so-called office building that adopts a suspended ceiling structure, a store, a meeting place, a passage, or a general household ceiling, It is also used for medium and small ceilings.

In Building A, a beam 2 is bridged between the left and right columns 1, a girder 3 is bridged between the front and rear columns 1, and a roof truss 4 is further bridged between the girders 3. Except for the opening portion, the left and right wall surfaces 5a and 5b and the front and rear wall surfaces 5c and 5d form a wall surface 5 on the four sides. The front and rear and left and right wall surfaces 5a to 5d are continuous in the wall surface 5 at least in an upper portion and a lower portion near the ceiling 6 inside the building A.
The ceiling 6 is a suspended ceiling configured by attaching a ceiling material to the lower end of a suspension 7 whose upper end is fixed to the beam 2 (FIG. 2).
In addition, the building A of Example 1 assumes a gymnasium with a left-right column interval (span) of about 15 m, a front-rear column interval of 20 mm, and a ceiling height of about 6 m.

A net 8 for preventing the ceiling material from falling is supported by a wire 9 slightly below the ceiling 6 (FIGS. 1, 2 and 3).
The net 8 is one of flexible face materials, and in this embodiment, a net is formed by knitting fine stainless steel wires. The stainless steel wire net has high strength, and the appearance after tension is elegant and relatively inconspicuous. The mesh of the net 8 is 40 mm to 60 mm square.
The wire 9 is made of stainless steel, has a diameter of 6 mm in Example 1, is stretched in the beam direction, and a plurality of wires 9 are arranged at intervals of 750 mm to 900 mm in the beam direction. The wire 9 is slightly shorter than the interval between the left and right pillars 1 and both ends thereof are fixed to the wall surfaces 5a and 5b on the left and right sides of the building A, respectively. The interval between the plurality of wires 9 is substantially as described above, but may be increased or decreased depending on the situation. In short, a flexible face material is supported by a plurality of wires 9 supported only on the walls on both sides of the building. Therefore, when a flexible face material hangs down, the number of the plurality of wires 9 is increased, and the pitch between the wires 9 is reduced.

In the first embodiment, rail members 10a and 10b (FIGS. 2 and 3) (referred to as first rail members 10a and 10b) are fixed to the wall surfaces 5a and 5b so as to face each other. The wire 9 is fixed to the wall surfaces 5a and 5b using the attached turnbuckle 12 (FIG. 4).
The net 8 and the wire 9 are engaged with the wire 9 by zigzaging the wire 9 in the vertical direction in the net of the net 8 (FIG. 4).

The turnbuckle 12 (FIGS. 5 to 7) includes a case member 13, a hook member 14, a screw shaft member 15, a cover member 16, a rubber damper (buffer member) 17, and a plug 18 (FIGS. 5 and 6).
The case member 13 has a cylindrical shape made of metal or a strong synthetic resin. The case member 13 has a male screw part 19 at one end and a female screw part 20 at the other end. A penetrated tool insertion hole 21 is formed. A case female screw 22 is formed on the inner surface of the male screw portion 19.

The hook member 14 has a straight part 23 and a relatively long hook part 24 which is folded back at one end and made substantially parallel. One end (right end in the figure) of the straight portion 23 is formed as a male screw, a retaining nut 25 is screwed therein, and the other end is connected to the hook portion 24.
The screw shaft member 15 is integrally provided with a screw rod portion 26, a tool hook portion 27, and a caulking portion 28, and a lock nut 29 is screwed onto the screw rod portion 26. The screw rod portion 26 can be screwed into the case female screw 22 on the inner surface of the male screw portion 19. The crimping portion 28 has a cylindrical shape with an open end surface so that the end of the wire 9 can be inserted.

The cover member 16 has a cylindrical shape having the same outer shape as that of the case member 13, has a length substantially equal to that of the screw shaft member 15, and has one end closed with a through hole 30 through which the wire 9 is passed. . A cover side female screw 31 is formed on the inner surface of the other end of the cover member 16. The cover member 16 can be integrally attached to the case member 13 by screwing the cover-side female screw 31 into the male screw portion 19 of the case member 13.
In the first embodiment, the damper 17 is formed by stacking a plurality of rubber rings having an outer diameter slightly smaller than the inner diameter of the case member 13, and is used by being inserted into the straight portion 23 of the hook member 14.
The plug body 18 has a through hole 32 through which the straight portion 23 of the hook member 14 is passed in the center, and a plug male screw 33 is formed on the outer periphery.

The cover member 16 is fitted into the wire 9 from its end, and then the end portion of the wire 9 is inserted into the crimping portion 28 of the screw shaft member 15 to be crimped. Then, after a locking nut 29 is screwed to the screw rod portion 26 of the screw shaft member 15, the screw shaft member 15 is screwed to the case female screw 22 of the case member 13.
After the plug 18 and the damper 17 are fitted in this order in the straight part 23 of the hook member 14, a retaining nut 25 is screwed onto the male screw at the tip of the straight part 23.
Then, after the retaining nut 25 and the damper 17 are fitted into the hollow portion of the case member 13, the plug male screw 33 of the plug body 18 is screwed into the female screw portion 20 at the other end of the case member 13 to hook the hook member. 14 and the case member 13 are assembled.

  Thereby, the wire 9 and the hook part 24 are couple | bonded by the turnbuckle mechanism (turnbuckle 12) by the screw shaft member 15, the case member 13, and the hook member 14 (FIG. 7). In this mechanism, the screwing length between the screw rod portion 26 and the case member 13 can be adjusted by rotating the case member 13, and the straight portion 23 of the hook member 14 passes through the through hole 32 of the plug 18. Thus, the movement of the case member 13 in the axial direction and the rotation around the axis are possible.

The first rail members 10a and 10b are grooved members with lips formed so that the lips are opposed to the ends of the upper and lower flanges, with the slits 34 between the upper and lower lips facing the indoor side and facing the wall surface. It is fixed to 5a and 5b (FIG. 4), and the piece member 11 is attached to the inner space (FIG. 8). As shown in FIG. 9, the piece member 11 is basically a rectangular parallelepiped in which each front view seen from the direction in which the rail members face each other is basically a rectangle, and the dimension of the short side a of the rectangle is the first The width of the slits in the rail members 10a and 10b is smaller than that of the slits, and the length of the long side b is slightly larger than the internal dimensions of the upper and lower flanges of the first rail members 10a and 10b. Moreover, the dimension of the rectangular parallelepiped in the depth direction is smaller than the depth dimension of the inner space of the first rail members 10a and 10b. Furthermore, at least one corner ridge is rounded out of four corners (called corner ridges) extending in the depth direction of the rectangular parallelepiped.
Note that a gate-shaped locking portion 35 is integrally formed on the indoor side surface of the piece member 11.

The piece member 11 is fitted into the inner space of the first rail member 10a, 10b from the slit 34 of the first rail member 10a, 10b in a posture rotated sideways with the long side b horizontal (see FIG. ]) After adjusting the position of the rail member in the longitudinal direction, if it is rotated 90 ° with the chamfered side first at a predetermined location, that is, it is rotated about the axis along the opposing direction. Then, the surface on the short side a side of the piece member 11 slightly pushes up the first rail members 10a and 10b, and is pressed against and fixed to the inner surface (FIG. 8 [B]).
The engaging portion 35 of the piece member 11 is arranged so that the engaging portion with the hook member 14 is horizontal when the piece member 11 is fixed to the first rail members 10a and 10b (FIG. 9 [ B)
As shown in FIG. 9A, when the engaging portion is horizontal, the hook portion 24 of the hook member 14 can be engaged with the engaging portion 35 even when the wire 9 swings up and down due to an earthquake or the like. A large external force is not applied to the piece member 33 only by rotating up and down as the center. On the other hand, as shown in FIG. 9B, when the engagement portion with the hook portion 24 is vertical, the moment when the hook portion 24 rotates with the engagement portion sandwiched between them, The base portion of the hook member 14 is twisted with respect to 35, and this base portion is easily damaged.

The net 8 is stretched as follows.
The wire 9 with the turnbuckle 12 attached to the end is passed through the mesh of the net 8 in a zigzag manner.
Next, the net 8 is spread on the floor (FIG. 10 [A]).
The wire 9 arrange | positions the required number calculated | required previously in parallel in the direction (beam direction) between the wall surfaces 5a and 5b of the both sides which installed the 1st rail member 10a, 10b in Example 1. FIG.
Auxiliary ropes 36 are attached to the hook portions 24 of the turnbuckles 12 at both ends.
Next, by using a workbench or a device that can be raised and lowered, the first rail member 10a in which the pulling rope 36 of one turnbuckle 12 is pulled and the hook portion 24 of the turned turnbuckle 12 is fixed to one wall surface 5a. The piece member 11 is engaged. Thereby, the end of the wire 9 is attached to the 1st rail member 10a. At this time, the hook portion 24 of the turnbuckle 12 is engaged with the locking portion 35 of the piece member 11. As described above, the engagement mode is a mode in which the hook portion 24 can rotate on the horizontal locking portion 35 on a plane perpendicular to the engagement portion (FIG. 9 [A]).
Note that the piece member 11 is inserted from the slit 34 of the first rail member 10b, and is rotated by 90 ° at a previously marked place and fixed at that place (see FIGS. 8A and 8B). ]).

By repeating this, one turn buckle 12 of each wire 9 is all attached to one wall surface 5a (FIG. 10 [B]).
Similarly, the other end of the wire 9 is also pulled up using the rope 36 and attached to the other wall surface 5b (FIG. 10 [C]).
In the above operation, the weight of the net 8 is added to the wire 9, and in some cases even one end of the wire 9 is pulled up to the position of the first rail member 5a as shown in FIG. May be difficult. At this time, by pulling the net 8 along the wire 9 to the opposite side, lightening one end side of the wire 9 to engage with the first rail member 5a, and then returning the net 8 to its original state. The winding effort can be reduced. The same operation is performed on the opposite side, and finally the net 8 gathered at the center is expanded to both sides.
In addition, including the above case, when it is difficult for one worker to lift the end of the wire 9, another worker points (the support tool with a bifurcated tip) to the middle of the wire 9. It is desirable to push up the part from below.
Further, when a pulley or a simple hoisting tool is used to pull up one end or the other end of the wire 9 to the position of the first rail members 10a and 10b, the working time can be shortened and labor can be reduced.
Furthermore, in the above, the turnbuckle 12 is completely attached to the end of the wire 9 and then the mesh of the net 8 is passed through. However, when the turnbuckle 12 is large with respect to the mesh and difficult to pass through, the wire 9 After the cover member 16 is inserted, the end of the wire 9 is then crimped to the crimping portion 28 of the screw shaft member 15, and the mesh is passed through as it is. Then, after passing, the other case member 13 and the hook member 14 are attached.
In addition, as shown in FIG. 19, when the cover member 16 has a cylindrical shape whose tip is not closed, the cover member 16 is also mounted after the wire 9 having the screw shaft member 15 attached is passed through the mesh. Therefore, the operation of passing the wire 9 through the net 8 can be performed more smoothly, and the operation time can be shortened.

Next, a screwdriver or the like is inserted into the tool insertion hole 21 (FIG. 7) provided in the case member 13 of the turnbuckle 12 to rotate the case member 13 and tension each wire 9. Thereby, the slack of the wire 9 and the net 8 is eliminated. At this time, the tool hooking portion 27 of the screw shaft member 15 is prevented from rotating with a spanner or the like to restrict the joint rotation of the screw shaft member 15 and the case member 13. Then, when the tension of the wire 9 becomes appropriate, that is, when the turnbuckle 12 has an appropriate length, the locking nut 29 is moved until it comes into contact with the end surface of the case member 13, and the axial position of the screw shaft member 15 is reached. To fix.
Since the hook member 14 comes out of the case member 13 with the tension of the wire 9, the damper 17 fitted in the straight portion 23 of the hook member 14 is sandwiched between the plug 18 and the retaining nut 25. It is compressed with.
At this time, as shown in FIG. 20, the case member 13 is provided with a small window 57 through which the amount of contraction of the elastic member or the biasing means in the damper 17 can be observed, and the standard amount of contraction (the amount by which the tension of the wire 9 is in an appropriate state). ) Is provided, the tension of the plurality of wires 9 can be made constant, and the tension between the wires 9 can be easily maintained. In addition, the tension of the wire 9 is too low and the net 8 is loosened to impair the aesthetics. Conversely, the tension of the wire 9 is too high and the wire 9 and the net 8 are affected by vibration or falling objects. You can avoid situations such as breaking. That is, by providing the small window 57 and the mark 58, it is easy to adjust when the wire 9 is loosened, and it is easy to maintain the wire 9 at a predetermined tension.

In this way, the net 8 is stretched below the ceiling 6 by the wire 9. Further, the wire 9 is tensioned by the turnbuckle 12 and the tensioned state is maintained by the damper 17. Along with this, the net 8 is also stretched almost flat, so that it looks good even on a fail-safe ceiling. As described above, when the pitch between the wires 9 is reduced and the drooping of the net 8b is supported by a large number of wires 9, the degree of tension of the wire 9 is relaxed, and the elongation of the wire 9 can be suppressed.
Furthermore, even if the wire 9 vibrates due to an earthquake, or the ceiling material falls on the net 8 and an impact is applied to the wire 9, the external force applied to the wire 9 by the damper 17 built in the turnbuckle 12 is changed. Therefore, it is possible to prevent the wire 9 and the net 8 from being broken and the connecting portions between the both ends of the wire 9 and the first rail members 10a and 10b from being damaged and detached. At this time, the pitch between the wires 9 can be reduced to reduce the impact of the falling ceiling material with the plurality of nearby dampers 17, and the individual burden on the dampers 17 can be reduced.
The proof strength of the net 8 is preferably about 66 kg / m ^2, which is more than three times the standard in order to enhance safety.

Next, the cover member 16 is brought close to the case member 13 to cover the screw shaft 15, and the cover side female screw portion 31 is screwed to the male screw portion 19 of the cover member 13 to couple the case member 13 and the cover member 16. (FIG. 5).
Edges 37a, 37b on both sides in the beam direction and edges 38a, 38b on both sides in the beam direction of the stretched net 8 are fixed to the left and right wall surfaces 5a, 5b and the front and rear wall surfaces 5c, 5d by appropriate means (FIG. 3). .
In the first embodiment, beam-side slide members 39a (39b) (FIG. 4) are slidably attached to the first rail members 10a, 10b of the left and right wall surfaces 5a, 5b using the slit 34 and the upper and lower lips thereof. The edges 37 a and b on both sides of the net 8 in the beam direction are hooked on the hook 40 provided on the hook 40.

The slide members 39a and 39b are located between the piece members 11 for attaching the wires 9, and are rotated by 90 ° at appropriate positions with respect to the first rails 10a and 10b, similarly to the piece members 11 for wires. A structure that can fix the position may be used, or the height dimension of the piece may be slightly reduced so as to be slidable. Even if it is slidable, the positions of the slide members 39a and 39b are roughly determined by the tension of the net 8, and can move only within the range between the two wire piece members 11 whose positions are fixed. The hooks 40 of the slide members 39a and 39b face upward, and are attached by pulling the edge 37a (37b) of the net 8 and hooking the corners of the mesh on the hook 40.
This eliminates the net-free area where the net 8 does not exist between the edges 37a, 37b on both sides in the beam direction of the stretched net 8 and the left and right wall surfaces 5a, 5b, and improves the safety by the fail-safe structure ceiling. .

In the first embodiment, the second rail members 41a and 41b are attached to the front and rear wall surfaces 5c and 5d, and the edges 38a and 38b on both sides of the net 8 are attached using the slide members 39c and 39d attached thereto. (Figure 3). The second rail members 41a and 41b are grooved members with lips similar to the first rail members 10a and 10b, and are fixed at the same height as the first rail members 10a and 10b. Similarly to the first rail members 10a and 10b, slide members 39c and 39d are mounted on the second rail members 41a and 41b so as to be slidable in the longitudinal direction. The slide members 39c and 39d have hooks 40 and protrude from the slits between the lips of the second rail members 41a and 41b. Similarly to the above, the slide members 39c and 39d may be structured such that the slide members 39c and 39d can be fixed in position by rotating 90 ° at appropriate positions with respect to the second rail members 41a and 41b. It may be possible.
In any case, this eliminates the net-free area where the net 8 does not exist between the edges 38a, 38b on both sides of the string 8 of the stretched net 8 and the front and rear wall surfaces 5c, 5d. Safety is further improved.
In the above, the connection between the edges 37a, 37b on both sides in the beam direction of the net 8 and the left and right slide members 39a, 39b, and the connection between the edges 38a, 38b on both sides in the beam direction and the front and rear slide members 39c, 39d are as follows. At the nodule part. That is, the net 8 is stretched in a rhombus shape in which the knots of the mesh are arranged in the beam direction and the girder direction. In this way, when the mesh is formed into a rhombus, the mesh knot is hooked on the hook 40 of the slide member 39, so that the mesh is strong and can be connected to each other when the adjacent nets need to be joined. Furthermore, when the wire 9 is passed, the piercing direction becomes longer than the diagonal direction of the mesh, which makes it easy to work.

If the slide members 39c and 39d are slidable with respect to the second rail members 41a and 41b, the slide member 39a or 39b of the first rail member 10a or 10b in the spar direction and the net 8 are engaged. The net 8 can be slid along the wire 9 in the beam direction, and the net 8 can be shifted to one side in the beam direction like a curtain (FIG. 12).
This structure requires only the net 8 to be pulled to the required position when performing maintenance such as lighting and air conditioning equipment attached to the ceiling 6, so that it is not necessary to remove and attach the wires 9 and net 8 which require labor. Work becomes easy.
Thus, in order to shift the net 8 to one side in the beam direction, it is necessary to support the wire 9 only at both ends without hanging the intermediate portion of the wire 9 from the ceiling 6.
The wire 9 is preferably stretched in the short side direction as shown in FIG.

FIG. 13 shows a second embodiment. Unlike the building A, the building B has a structure in which pillars are greatly projected on the indoor side even near the ceiling 6, such as a steel concrete structure.
In such a building B, a plurality of anchors 42 (for example, FIG. 14) are driven at the same height position of the wall surface 5 along the unevenness of the wall surface 5, and the end portion of the wire 9 is engaged with the locking portion 35. Together, the wire 9 is fixed between the wall surfaces 5a and 5b (direct method). Although the length of the wire 9 varies depending on the unevenness of the wall surface 5, the turnbuckle 12 having the hook portion 24 and the damper 17 at the end of the wire 9 can be used as in the first embodiment.
Even in the structure of the second embodiment, an anchor (not shown) corresponding to the slide member 39 of the first embodiment is driven into the net 9 in order to reduce the non-net area generated between the net 8 and the wall surfaces 5a to 5d. Are engaged (FIG. 13).

The indirect method as in the first embodiment is suitable for the case of the building A with less unevenness on the wall surface 5 (5a to 5d), but the direct method as in the second embodiment suppresses the generation of a large net-free area. From the point, it can be said that it is suitable for the case of the building B having the unevenness on the wall surface 5 (5a to 5d).
In addition, the extending | stretching direction of the wire 9 may be parallel to a girder, and may skew with respect to a beam or a girder. The wires 9 do not necessarily have to be parallel to each other, and can be selected according to the situation such as the form of the ceiling 6.

  FIG. 15 shows a third embodiment in which a work opening 43 is provided in the net 9 stretched by the direct method. The working opening 43 is cut off from the three sides of the rectangular portion 44 (FIG. 16) in the net 9, and the rectangular portion 44 hangs downward with the remaining one side as a hinge portion. Open. The rectangular portion 44 is disposed immediately below the lighting device 45 and the ventilation device disposed on the ceiling 6, and the three notches are connected by a zipper 46. That is, the zipper 46 in a closed state is fixed (adhered, sewn, etc.) in three places as the opening 43, then the zipper 46 is opened, and the net 8 located between the meshing teeth of the zipper 46 is opened. Cut all three sides along the zipper. When the zipper 46 is closed, the cut nets 8 on both sides are connected, and the opening 43 is closed.

  In the case of the direct method, the net 8 is easily stretched, and it is difficult to perform maintenance management of the lighting device 45 and the ventilation device arranged on the ceiling 6. However, according to the structure of the third embodiment, the zipper 46 of the opening 43 provided immediately below the device arranged on the ceiling 6 can be opened to open the net 8 only at that portion. The work efficiency such as is greatly improved.

FIG. 17 shows the fourth embodiment, in which the net 8 stretched by the direct method in the building B is continuously stretched by dividing the net 8a divided into two wires 9 in this embodiment. is there. In this structure, in the direct method in which the tensioning is likely to be fixed, it is only necessary to remove the divided net 8a corresponding to the position of the lighting device 45 and the ventilation device arranged on the ceiling 6, so that maintenance work is reduced. . In addition, since the net 8 can be stretched in small portions, the net stretching labor for fail-safe is reduced as compared with the case where the large net 8 is handled. Furthermore, the tension state of the entire net 8 can be adjusted frequently.
When the net 8 is stretched, it is not necessary to overlap the wires 9 of the divided net 8a. It is permissible to provide a gap between the divided nets 8a as long as the gap can prevent the ceiling material from dropping directly. . However, when the wire 9 of the divided net 8a is spaced from the wire 9 of the adjacent divided net 8a, the adjacent wires 9 are connected to each other with a ring catch or a carabiner, and these wires 9 are drawn together.

FIG. 18 shows a fifth embodiment, which is different from the first embodiment in the configuration of the turnbuckle 12. In the turnbuckle 12 according to the fourth embodiment, the screw shaft portion 15 of the turnbuckle 12 according to the first embodiment has a chuck structure 47, and when the wire 9 is tensioned after being inserted through the end of the wire 9, the turnbuckle is turned on. 12, the end of the wire 9 is fixed by the wedge effect.
Hereinafter, parts common to the first embodiment will be described using the same reference numerals.
The screw shaft portion 15 of the fifth embodiment (FIG. 18 [B]) includes a cylindrical member 49 having a chuck male screw 48 provided on the outer peripheral surface, a release member 50, a wedge member 51, a spring 52, and a stopper member 53. The cylindrical member 49 can be screwed onto the case female screw 22 of the case member 13 by a chuck male screw 48 on the outer peripheral surface. The cylindrical member 49 has a conical surface in which the inner surface on the distal end side (the side into which the wire 9 is inserted) is tapered toward the distal end side, and an opening 54 is formed at the apex portion thereof.

The release member 50, wedge member 51, spring 52, and stopper member 53 are mounted in this order from the front end side inside the cylindrical member 49.
As shown in FIG. 18 [B], the release member 50 has a structure in which a flange is provided at the rear end of the cylindrical portion through which the wire 9 can penetrate, and the flange portion is inserted into the cylindrical member 49 from the rear side. The cylindrical member 49 is engaged with the inside of the distal end portion, and the cylindrical portion is protruded to the outside of the cylindrical member 49.
The wedge member 51 is divided in the circumferential direction, and a space in which the wire 9 is sandwiched between the divided pieces is formed. The front end of the wedge member 51 abuts on the rear surface of the flange of the release member 50, and the front end surface of the spring 52 is in contact with the rear end surface of the wedge member 51.

The stopper member 53 is fixed to the rear end portion of the cylindrical member 49, and an insertion hole 55 through which the wire 9 is inserted is formed at the center.
The spring 52 is mounted between the stopper member 53 and the wedge member 51 in a compressed state.
When the split piece of the wedge member 51 is pushed forward by the spring 52, the wedge member 51 is brought inward by the conical surface of the inner surface of the distal end portion of the tubular member 49, and when the release member 50 is pushed backward, the wedge member 51 is pushed. Is in a state where it can be diffused outward from the state of being retracted and moved inward.
Other configurations such as the damper 17 and the hook member 14 are the same as those in the first embodiment.

The wire 9 is passed from the distal end side of the release member 50 through the tube portion, passes the wedge member 51 while pushing the release member 50 backward, and further reaches the case member 13 through the spring 52 and the insertion hole 55 of the stopper member 53. Let Next, the tip is passed through the passage hole 56 of the case member 13 and led out to the outside of the turnbuckle 12. When the pressing of the release member 50 is released, the wire 9 is fixed to the turnbuckle 12 by the wedge member 51. Since the wire 9 in this state can be pulled out rearward, the tension of the wire 9 can be increased. However, the wire 9 cannot be pulled forward due to the wedge effect of the wedge member 51 unless the release member 50 is operated. The adjusted tension of 9 is maintained.
The structure of the fifth embodiment can previously adjust the tension of the wire 9 by pulling the wire 9, and the amount of adjustment is larger than the case of only the turnbuckle function, so that the troublesome length of the wire 9 must be carefully determined. Disappears.

The above is an example.
The turnbuckle 12 may be attached only to one end of the wire 9.
The damper built in the turnbuckle may be other than rubber, for example, a coil spring.
The means for connecting the end of the wire 9 to the first rail 10 is not limited to the use of the above-mentioned piece member 11, for example, a member that loosens and slides the screw and tightens the screw to fix the slide position. Various means such as those provided with a stop 35 can be employed.
The net 8 and the wire 9 may be configured such that the wire 9 is knitted simultaneously when the net 8 is knitted.

In order to attach the girder direction edges 38a and 38b and the beam direction edges 37a and 37b to the front and rear wall surfaces 5c and 5d and the left and right wall surfaces 5a and 5b in the net 8, a rope is attached along each of these edges. The rope may be attached to the front and rear wall surfaces 5c and 5d and the left and right wall surfaces 5a and 5b. The edge of the net 8 is not frayed and the mounting strength can be increased.
The rail member 10, the rail member 41, the piece member 11, and the slide member 39 can be made of aluminum alloy, steel, or synthetic resin.
If the building has a steel structure and there is an H-type steel material exposed on the inner wall, an engagement member that can engage the end of the wire 9 or the edge of the net 8 is fixed to this by welding or screwing. Or a through-hole is directly provided in an H-shaped steel material and the like, and hook portions 24 at both ends of the wire 9 are engaged therewith.
The extending direction of the wire 9 may be either the beam direction or the girder direction. In particular, the direct method is not limited to the beam direction and the girder direction. Furthermore, it is not restricted to the case where the wire 9 is stretched in parallel. The wire 9 may be crossed and stretched.

A Building B Building 1 Pillar 2 Beam 3 Girder 4 Roof truss 5 Wall surface 5a Left wall surface 5b Right wall surface 5c Front wall surface 5d Rear wall surface 6 Ceiling 7 Lifting tool 8 Net 9 Wire

10 Rail member (first rail member)
10a First rail member (left)
10b First rail member (right)
11 piece member 11a piece member (left)
11b piece member (right)
12 Turnbuckle 13 Case member 14 Hook member 15 Screw shaft member 16 Cover member 17 Damper 18 Plug body 19 Male screw part

20 Female thread portion 21 Tool insertion hole 22 Case female screw 23 Direct portion 24 Hook portion 25 Retaining nut 26 Screw rod portion 27 Tool hook portion 28 Caulking portion 29 Retaining nut

30 Through-hole 31 Cover-side female screw 32 Through-hole 33 Plug body male screw 34 Slit 35 Locking portion 36 Thatched rope 37 Beam direction edge 37a Beam direction edge (left)
37b Beam direction edge (right)
38 Girder edge 38a Girder edge (front)
38b Girder edge (rear)
39 Slide member 39a Left slide member 39b Right slide member 39c Front slide member 39d Rear slide member

40 Hook 41 Second rail member 41a Second rail member (front)
41b Second rail member (rear)
42 Anchor 43 Work Opening 44 Rectangular Part 45 Lighting Equipment 46 Zipper 47 Chuck Structure 48 Chuck Male Screw 49 Cylindrical Member

50 Release member 51 Wedge member 52 Spring 53 Stopper member 54 Opening 55 Insertion hole 56 Passage hole 57 Small window 58 Marking

Claims (6)

A fail-safe ceiling structure in which a ceiling material is suspended from a structure behind the ceiling and a flexible surface material is stretched under the ceiling, and both ends of a plurality of wires arranged at intervals are placed on the wall surface below both sides of the ceiling. Attached along, supporting the flexible face material with these wires supported only on the wall surfaces on both sides ,
Both ends of the wire are fixed to the wall surface facing the beam direction of the building, or attached to a piece member attached to a long rail member fixed facing the beam direction,
The rail member is a grooved material with a lip and is attached with the slit between the upper and lower lips facing the indoor side,
Each of the piece members is basically a rectangular parallelepiped in which each front view viewed from the direction in which the rail members are opposed is basically a rectangle, and the short side dimension of the rectangle is larger than the width dimension of the slit in the rail member. The dimension of the long side is slightly larger than the inner dimension of the upper and lower flanges of the rail member, the dimension of the rectangular parallelepiped in the depth direction is smaller than the depth dimension of the inner space of the rail member, and Of the four corners extending in the depth direction, at least one corner is rounded,
The piece member is fitted in the inner space of the rail member from the slit of the rail member with the long side thereof being horizontal, adjusted in the longitudinal direction of the rail member, and then along the facing direction at a predetermined location. It is fixed inside the rail member by rotating around the axis.
Fail-safe ceiling structure characterized by that. The wire is attached to the piece member by engaging a hook with a gate-type engaging portion provided in the piece member, and the engaging portion is rotated by the piece member to the inside of the rail member. 2. The fail-safe ceiling structure according to claim 1, wherein the fail-safe ceiling structure is arranged on the piece member so as to be horizontal in a fixed state. The fail-safe ceiling according to claim 1 or 2, wherein the wire is attached to a wall surface via a turnbuckle and a damper having an elastic body or a biasing member that absorbs fluctuations in external force applied to the wire. Construction. The fail-safe ceiling structure according to any one of claims 1 to 3, wherein the flexible face material is a net. The net is obtained by knitting a stainless fine wire, failsafe ceiling structure according to claim 4 which is characterized by that is in front knitting Kiwa ear. The fail-safe ceiling structure according to claim 3 , wherein a small window for observing the amount of contraction of the elastic member or the biasing means and a mark indicating a standard amount of contraction are provided on the damper.

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