JP6207317B2 - Ceiling structure - Google Patents

Description

  The present invention relates to a technique for reinforcing a ceiling.

  Ceiling materials such as a field edge and a field edge support are suspended from the ceiling housing and the ceiling structure that supports the ceiling panel (including the ceiling board) with the ceiling foundation material is intended to prevent its falling out during an earthquake. There is a need. As this type of ceiling earthquake-resistant structure, a structure in which a wire or a brace is fixed between a ceiling base material and a ceiling part housing to perform earthquake-proof reinforcement has been proposed (for example, Patent Documents 1 to 3).

Japanese Patent Laid-Open No. 2003-138689 JP 2004-76433 A JP 2007-239441 A

  In the conventional earthquake-resistant structure described above, if the strength of the ceiling base material is low, tension cannot be introduced into the wire or brace, and there is a limit to durability against horizontal force. Moreover, since the horizontal force with respect to a ceiling panel is transmitted to a ceiling part housing | casing via a ceiling base material, stress may concentrate on a part of ceiling base material. When the ceiling is large, it may be necessary to provide braces or the like in multiple stages, and the mechanism for transmitting the horizontal force tends to be complicated. Furthermore, when reinforcing existing ceilings, almost all ceiling base materials must be removed and replaced with new ones.

  An object of the present invention is to improve durability against horizontal force without greatly depending on the configuration of the ceiling base material.

According to the present invention, for example, a ceiling base material suspended from a ceiling body by a hanger, a ceiling panel supported by the ceiling base material, and a column connected to the ceiling part body and the ceiling panel And a plurality of branch lines extending in different directions from the support column and stretched between the support column and the ceiling housing , and the support column is provided with a full-length adjusting mechanism that expands and contracts its entire length, The full length adjustment mechanism is a mechanism that adjusts the length of the portion closer to the ceiling panel than the connection portion between the plurality of branch lines and the support column .

  ADVANTAGE OF THE INVENTION According to this invention, durability with respect to a horizontal force can be improved without being greatly influenced by the structure of a ceiling base material.

Explanatory drawing of the ceiling structure which concerns on one Embodiment of this invention. The fragmentary sectional view of a support | pillar. (A) thru | or (C) are explanatory drawings of a connection metal fitting. (A) is a fragmentary sectional view of the support | pillar of another embodiment, (B) is explanatory drawing of the connection metal fitting of another embodiment. (A) is a fragmentary sectional view of the support | pillar of another embodiment, (B) is explanatory drawing of the connection metal fitting of another embodiment. (A) is a perspective view of the connection part of the support | pillar member and connection metal fitting of another embodiment, (B) is each side view of the support | pillar member lower part of another embodiment.

<First Embodiment>
FIG. 1 is an explanatory diagram of a ceiling structure A1 according to an embodiment of the present invention. The ceiling structure A includes a ceiling base material 1, a ceiling panel 2, a support column 3, and a plurality of branch lines 4.

  The ceiling base material 1 is suspended from the ceiling housing B by a hanging tool 5. The ceiling body B is, for example, a floor slab on the upper floor. The hanger 5 includes a steel rod 51 such as a screw rod and a hanger 52. The upper end of the steel bar 51 is fixed to the ceiling part housing B, and the lower end is fixed to the hanger 52 by a nut, for example.

  The ceiling base material 1 includes a plurality of field edges 10 and a plurality of field edges 11. The field edge receiver 10 and the field edge 11 are horizontally disposed so as to be orthogonal to each other, and are joined to each other by the clip 11 at the intersection. The field edge receiver 10 is locked to the hanger 52 and is suspended from the ceiling housing B by the hanger 5. The field edge receiver 10 and the field edge 11 are, for example, channel steel. In the example of FIG. 1, field edges 11 having different sizes are used.

  The ceiling panel 2 is supported by the ceiling base material 1. The ceiling panel 2 is fixed to the field edge 11 with a tapping screw, for example.

  The support column 3 is connected to the ceiling body B and the ceiling panel 2. The plurality of branch lines 4 are stretched between the column 3 and the ceiling case B. This embodiment is a structure which supports the support | pillar 3 to the ceiling part housing | casing B by a support | pillar branch system. The branch line 4 can employ a wire rod such as a wire or a steel rod such as a screw rod. One end of the branch line 4 is connected to the ceiling housing B and the other end is connected to the column 3. By providing a tensioning device 41 such as a turnbuckle at a midpoint or end of the branch line 4, the tensioning portion 41 is tensioned. The branch line 4 extends from the column 3 in different directions. The plurality of branch lines 4 extend radially, for example, in plan view with the support column 3 as the center. The number of branch lines 4 is preferably three or more (three or more directions).

  The support column 3 includes a support member 31, a connection hardware 32, and a connection hardware 33, and the vertical length can be adjusted. The connection hardware 33 includes a plurality of metal fittings 331 to 333. The structure of the support | pillar 3 is explained in full detail with reference to FIG.2 and FIG.3. FIG. 2 is a partial cross-sectional view of the column 3. FIG. 3A is a plan view, a front view, and a bottom view of the metal fitting 331. FIG. 3B is a plan view, a front view, and a bottom view of the metal fitting 332. FIG. 3C is a plan view and a front view of the metal fitting 333.

  The column member 31 is a bar-like member extending vertically, and in the case of the present embodiment, is a steel material having a circular cross section, and particularly a steel pipe is reduced in weight. The support body 31 may be a square steel pipe or the like. A threaded portion 31 a is formed on the upper outer periphery of the support member 31. In addition, when the longer full length support | pillar member 31 is required, it is good also as a support | pillar member 31 by connecting a some member with a joint.

  The connection hardware 32 includes a cylindrical portion 32a having a screw portion that is screwed with the screw portion 31a, and a base plate 32b. The base plate 32 b is fixed to the ceiling part casing B with a fastening member such as a bolt, and the column member 31 is connected to the ceiling part casing B via the connection hardware 32.

  The connection hardware 33 is provided at the lower end of the support member 31 and connects the support member 31 and the ceiling panel 2. In the case of the present embodiment, the connection hardware 33 further includes a full length adjustment mechanism for the support column 3 and a connection structure for the branch line 4.

  The metal fitting 331 constitutes a support member connection portion connected to the lower end portion of the support member 31 and also constitutes a branch connection portion to which a plurality of branch lines 4 are connected. The metal fitting 331 includes a disk-shaped plate 3312 to which the branch line 4 is connected, a connection portion 3311 extending upward from the plate 3312, and a connection portion 3313 extending downward from the plate 3312.

  The connecting portion 3311 has a cylindrical shape into which the lower end portion of the column member 31 can be inserted, and a pair of screw holes 3311a are formed on the peripheral wall at positions facing each other. The column member 31 and the metal fitting 331 are fixed to each other by fastening the screw 6 to the screw hole 3311a and pressing the peripheral surface of the column member 31 in a state where the lower end portion of the column member 31 is inserted into the connection portion 3311. . This fixing method has an advantage that the fixing position can be adjusted up and down. In addition, other methods can also be used for these fixing methods, and for example, fastening with screws may be used as in a fixing method of the upper end portion of the support member 31 and the connection hardware 32.

  A plurality of connection holes 3312 a for connecting the branch lines 4 are formed in the plate 3312. The connection holes 3312a are formed in a plurality of locations in the circumferential direction, and have a configuration in which the degree of freedom for selecting the stretched portion of the branch line 4 is increased. In addition, in this embodiment, although the connection hole 3312a was employ | adopted by the point which simplifies a connection structure with the branch line 4, other connection structures (for example, screw fastening) are also employable.

  The connection portion 3313 has a cylindrical shape, and a screw portion 3313a for connection to the metal fitting 332 is formed on the inner peripheral surface thereof.

  The metal fitting 332 forms a full length adjustment mechanism of the support column 3. The metal fitting 332 is connected to a disk-shaped plate 3322, a connection portion 3321 extending upward from the plate 3322, a connection portion 3324 extending downward from the plate 3322, a lower surface of the plate 3322, and an upper peripheral surface of the connection portion 3324. The rib 3323 is provided.

  In the case of this embodiment, the connection portion 3321 has a round steel shape with a screw portion formed on the outer peripheral surface, and is inserted into the screw portion 3313a of the metal fitting 331 to be screwed together. In the case of this embodiment, the connecting portion 3324 has a round steel shape in which a screw portion is formed on the outer peripheral surface except the upper portion, and is screwed with the screw portion 3331a of the metal fitting 333. The vertical distance between the metal fitting 331 and the metal fitting 333 is variable depending on the screwing amount of the connection portion 3321 with respect to the screw portion 3313a or the screwing amount of the connection portion 3324 with respect to the screw portion 3331a. Thereby, the full length of the support | pillar 3 expands and contracts, and the level adjustment of the ceiling panel 2 can be performed. The screws may be reverse screws of the connection portion 3321 and the screw portion 3313a and the connection portion 3324 and the screw portion 3313a.

  The plurality of ribs 3323 function as an operation unit used when an operator turns the metal fitting 332 with a tool or hand in order to reinforce the metal fitting 332 and adjust the level of the ceiling panel 2.

  In this embodiment, the full length adjustment mechanism of the support column 3 is a mechanism that adjusts by the screwing amount, but other methods can also be adopted. For example, one member is provided with a plurality of height selection holes in the vertical direction, the other member is provided with one engagement hole, and a pin is inserted into one of the height selection holes and the engagement hole. It may be configured.

  The metal fitting 333 constitutes a panel connection part connected to the ceiling panel 2. The metal fitting 333 includes a base plate 3333, a connection portion 3331 erected on the base plate 3333, a plurality of ribs 3332 connected to the upper surface of the base plate 3333 and the peripheral surface of the connection portion 3331, and a spacer 3334.

  The base plate 3333 has a plate shape, and in the case of the present embodiment, the base plate 3333 has a square shape in plan view. The base plate 3333 is connected to the ceiling panel 2 by, for example, a tapping screw. When connecting to the ceiling panel 2 with a tapping screw, it is further preferable to fix the lower surface of the base plate 3333 and the ceiling panel 2 with an adhesive such as a double-sided adhesive tape. Thereby, the transmission of the horizontal force from the ceiling panel 2 to the support column 3 becomes smooth, the stress concentration can be reduced, and a large area can be seismically strengthened at one place.

  The connecting portion 3331 has a cylindrical shape, and a screw portion 3331a to which the connecting portion 3324 of the metal fitting 332 is screwed is formed on the inner peripheral surface thereof. The plurality of ribs 3332 reinforce the strength of the metal fitting 333. The spacer 3334 is fixed to the upper surface of the base plate 3333, and is a member that fills the gap between the field receiver 10 and the base plate 3333. In the present embodiment, the spacer 3334 is a square steel pipe. The spacer 3334 can function as a cushioning material between the field receiver 10 and the base plate 3333.

  In the ceiling structure A having such a configuration, the structure is a support-branch-type structure including the support column 3 and the plurality of support lines 4, and the structure is provided in which the ceiling panel 2 is seismically reinforced without using the ceiling base material 1. Even if the tension of the branch line 4 is increased, the ceiling base material 1 is not subjected to a load, and the horizontal force is transmitted from the ceiling panel 2 to the ceiling body B without passing through the ceiling base material 1. Stress concentration on the base material 1 can be suppressed. Therefore, durability against horizontal force can be improved without being greatly affected by the configuration of the ceiling base material 1.

  In addition, since stress concentration on the ceiling base material 1 can be suppressed, a larger area of earthquake-proof reinforcement can be achieved at one place of the column 3. Since the direction in which the branch line 4 is stretched has a relatively high degree of freedom, even if there are equipment and piping on the back of the ceiling, the construction is easy to be affected.

  The level adjustment of the ceiling panel 2 is possible by providing the connection bracket 33 with the full length adjustment mechanism of the support column 3, and in particular, the level adjustment is possible even after the branch line 4 is tensioned.

  Even when the ceiling pocket is large, the basic joint is the same just by adjusting the lengths of the column 3 and the branch line 4, and a structure with high flexibility in application to the building structure can be provided.

  Since it is not greatly influenced by the structure of the ceiling base material 1, it is effective as a reinforcing structure for an existing ceiling including the ceiling base material 1 and the ceiling panel 2, and the column 3 can be used without completely removing the existing ceiling of the standard specification. And the seismic reinforcement can be done by adding the branch line 4.

Second Embodiment
In 1st Embodiment, although the plate 3312 which comprises a branch line connection part is located in the support | pillar member 31 side, you may position a branch line connection part in the ceiling panel 2 side. In other words, the branch line connecting portion may be located at a position closer to the ceiling panel 2 than the support member 31. FIG. 4A shows an example thereof, and is a partial cross-sectional view of a column 3 ′ of this embodiment that replaces the column 3. FIG. 4B is a plan view and a front view of a metal fitting 333 ′ according to this embodiment that replaces the metal fitting 333. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and different components will be described.

  The support column 3 ′ includes a support member 31 ′ and a connection hardware 33 ′, and the vertical length can be adjusted. The support member 31 ′ is integrally provided with a connection hardware 32 ′ that replaces the connection hardware 32 and a metal fitting 331 ′ that replaces the metal fitting 331. The support member 31 ′ is a bar-like member extending vertically, and in the case of this embodiment, is a steel material having a square cross section. If a longer full length column member 31 'is required, a plurality of members may be connected by a joint to form the column member 31'.

  The connection hardware 32 ′ is fixed to the upper end of the support member 31 ′, and a rib 32 c is connected between the base plate 32 b and the side surface of the support member 31 ′. The metal fitting 331 'is fixed to the lower end portion of the support member 31'. The metal fitting 331 ′ includes a disk-shaped plate 3312 ′ instead of the plate 3312. The branch line 4 is not connected to the plate 3312 ′. Therefore, the connection hole of the branch line 4 is not formed. A rib 3314 is connected between the plate 3312 'and the side surface of the column member 31'.

  The connecting portion 3313 has the same configuration as that of the first embodiment, and extends downward from the plate 3312 '. However, in this embodiment, a rib 3314 is connected between the plate 3312 ′ and the peripheral surface of the connection portion 3313.

  In the case of the present embodiment, the connection hardware 33 ′ has a two-member configuration, and includes a metal fitting 332 having the same configuration as that of the first embodiment, and a metal fitting 333 ′ in which a plate 3335 is integrally provided on the metal fitting 333. The The plate 3335 constitutes a branch line connecting portion to which a plurality of branch lines 4 are connected, and a plurality of connection holes 3335a for connecting the branch lines 4 are formed. Similar to the connection hole 3335a of the first embodiment, the connection holes 3335a are formed in a plurality of parts in the circumferential direction, and have a configuration in which the degree of freedom in selecting the stretched part of the branch line 4 is increased. Of course, as described in the first embodiment, another connection structure (for example, screw fastening) can be employed instead of the connection hole 3335a.

  In the support column 3 ′ having such a configuration, the branch line connecting portion (333 ′) is positioned on the ceiling panel 2 side. Therefore, the point of action of the tension force of the branch line 4 on the support column 3 ′ can be brought close to the ceiling panel 2. It is possible to suppress the deformation of the column member 31 ′ when a horizontal force is applied. In the present embodiment, not only the position of the branch line connecting portion (333 ′) but also the configuration of the connection hardware 32 ′ and the column member 31 ′ are different from those of the first embodiment. For example, in the first embodiment, A configuration in which the plate 3312 is removed from the metal fitting 331 and a metal fitting 333 ′ is used instead of the metal fitting 333 can also be adopted.

<Third Embodiment>
The connection hardware may be substantially composed of one member. FIG. 5 (A) shows an example thereof, and is a partial cross-sectional view of the support post 3 ″ of this embodiment replacing the support post 3 or 3 ′. FIG. 5 (B) shows the metal support of this embodiment replacing the metal fitting 333 or 333 ′. It is the top view and front view of 333 ". FIG. 6A is a perspective view of a connecting portion between the column member 31 ″ and the connection hardware 33 ″ (metal fitting 333 ″) in this embodiment, and FIG. 6B is a side view of the lower portion of the column member 31 ″. is there. Hereinafter, the same configurations as those of the first and second embodiments are denoted by the same reference numerals, description thereof will be omitted, and different configurations will be described.

  The support post 3 ′ includes a support member 31 ″ and a connection hardware 33 ″. In the case of the present embodiment, the support member 31 ″ is integrally provided with a connection hardware 32 ′ similar to that of the second embodiment. The support member 31 ″ is a bar-like member extending up and down. It is a square steel material. If a longer full length column member 31 'is required, a plurality of members may be connected by a joint to form the column member 31'.

  In the case of the present embodiment, the connection hardware 33 ″ has a substantially one-member configuration, and includes a metal fitting 333 ″ similar to the metal fitting 333 ′ of the second embodiment.

  The difference between the metal fitting 333 ″ and the metal fitting 333 ′ of the second embodiment is in the connection portion. The connection portion 3331 ′ of the metal fitting 333 ″ is a steel pipe having a square cross section corresponding to the support member 31 ″. Then, the size is the same as that of the support member 31 ″. Other configurations are the same.

  A base material 334 for connecting the connection portion 3331 ′ and the lower end portion of the column member 31 ″ is fixed to the connection portion 3331 ′. The base material 334 is an L-shaped angle in this embodiment. It is comprised from the material 3341 and 3342. In addition to an angle material, the cross-sectional square steel pipe etc. are employable.

  The angle members 3341 and 3342 are combined so as to have a substantially rectangular tube shape, and are fixed to the inner surface of the side portion so that there is almost no gap inside the connecting portion 3331 ′. In this embodiment, the fixing is performed by welding. Each side wall of the connection portion 3331 ′ is provided with an opening portion 3331b for welding work, and the base material 334 is fixed to the connection portion 3331 ′ by spot welding the periphery of the opening portion 3331b with the angle member 3341 or 3342. It is configured to do.

  The connecting portion 3331 ′ and the lower end portion of the column member 31 ″ are connected to each other through the base material 334 in such a manner that the end surfaces thereof are in contact with each other. Adjustment is possible.

  Here, the lower end portion of the column member 31 ″ and the base material 334 are fixed to each other by a tapping screw TS. In this embodiment, pilot holes h1 to h3 for tapping screws are provided at the lower end portion of the column member 31 ″. It has been. The pilot holes h1 to h3 are respectively formed on the four side surfaces 311a to 311d of the column member 31 ″. In order to avoid interference with the tapping screw TS, as shown in FIG. 6 (B), each of the side surfaces 311a to 311d is provided. The positions (heights) of the pilot holes h1 to h3 are shifted. The connection structure between the support member 31 ″ and the metal fitting 333 ′ is not limited to this, and various structures can be adopted. For example, each fixing of the base material 334, the column member 31 ″, and the metal fitting 333 ′ may be performed by welding, or conversely, may be performed by using a tapping screw.

  In the present embodiment, it is possible to improve the rigidity of the support post 3 ′ by making the connection hardware 33 ″ substantially one member. In addition, commercially available products with various plate thicknesses are available for the square steel pipe. For this reason, a thicker steel pipe can be adopted relatively easily as the support member 31 ″ and the connecting portion 33331 ′, and the rigidity can be improved relatively easily.

Claims (3)

A ceiling base material suspended from a ceiling housing by a hanging tool;
A ceiling panel supported by the ceiling base material;
A column connected to the ceiling housing and the ceiling panel;
A plurality of branch lines extending in a different direction from the support column and stretched between the support column and the ceiling housing ,
The support column is provided with a full length adjustment mechanism that expands and contracts its full length,
The full length adjustment mechanism is a mechanism that adjusts the length of the part on the ceiling panel side than the connection part of the plurality of branch lines and the support column.
A ceiling structure characterized by that. The ceiling structure according to claim 1,
The full length adjusting mechanism includes a plate, an upper connecting portion extending upward from the plate, a lower connecting portion extending downward from the plate, and a rib connecting the lower surface of the plate and the upper portion of the lower connecting portion. With fittings including
The upper connection portion is connected to a component part that constitutes the support column on the upper side of the metal fitting with a screw,
The lower connection portion is connected to a component part that constitutes the column on the lower side than the metal fitting with a screw,
A ceiling structure characterized by that. The ceiling structure according to claim 1,
The full length adjusting mechanism includes a first member provided with a plurality of height selection holes in the vertical direction, a second member provided with one engagement hole, and the plurality of height selection holes. A pin inserted into one of the holes and the engagement hole,
A ceiling structure characterized by that .

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