JP2012012912A - Earthquake proof reinforcement structure for ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake proof reinforcement structure for a ceiling capable of facilitating reinforcement construction work, making cost inexpensive, and eliminating remarkable shortening of the natural period of a ceiling by earthquake proof reinforcement.SOLUTION: An earthquake proof reinforcement structure for a ceiling is constituted in such a manner that a plurality of hanging bolts 2, each having a hanger 3 at its tip, are suspended from a building skeleton, a plurality of cradling receivers 4 hooked by the hangers 3 at prescribed intervals in a lengthwise direction of members are provided in parallel to each other, a plurality of cradlings 5 provided in parallel to each other so as to be orthogonal to the cradling receivers 4 are connected therewith by clips 6 at intersection points with the cradling receivers 4, and a ceiling panel 7 is fixed to the cradlings 5. A fluid or viscous adhesive material 8 is applied or injected to contact parts between the clips 6 and the cradling receivers 4 and to those between the cradling receivers 4 and the hangers 3.

Description

  The present invention relates to a seismic reinforcement structure for a ceiling suspended by a plurality of suspension bolts suspended from a building frame such as a floor slab or a beam in various facilities such as an office, a house, and a factory.

  Conventionally, as the ceiling structure 50, as shown in FIG. 10, a plurality of suspension bolts 51 provided with hangers 52 at the tip are suspended from the building housing, and the hangers 52 are arranged at predetermined intervals in the member longitudinal direction. A plurality of field ledges 53 hooked by the plurality of field edges 53 are provided in parallel, and a plurality of field edges 54 provided in parallel so as to be orthogonal to the field edge receivers 53 are formed by clips 55 at the intersections with the field edge receivers 53. A structure in which a ceiling panel 56 is fixed to the field edge 54 is known.

  However, in such a ceiling structure 50, the hanger 52, the field edge receiver 53, the field edge 54, and the clip 55 made of metal hardware are respectively latched and are not firmly fixed. These members are likely to slip, and damage often occurs such that the ceiling panel 56 falls off the fixed screw, or the ceiling panel 56 collides with a wall or a pillar and collapses.

  In order to prevent such damage, as shown in FIG. 11, the bracing 57 of the diagonal reinforcing material is attached between the field edge receiver 53 and the suspension bolt 51 to reduce the shaking of the field edge receiver 53 with respect to the orientation direction. In addition, an additional field receiver 58 is suspended between adjacent field receivers 53, 53, and a brace 59 of diagonal reinforcing material is attached between the additional field receiver 58 and the suspension bolt 51, thereby A seismic reinforced ceiling structure 60 has been proposed in which the fluctuation with respect to the orientation direction is reduced.

  In addition to this, as a reinforcing metal fitting for reducing slippage between members, the following Patent Document 1 is made of a thin plate material having screw holes at both ends, and the intermediate portion is turned to the lower side of the field edge, and the both ends thereof. The ceiling fall prevention clip which supports a field edge from the lower side by the hanging part of is disclosed. Further, in Patent Document 2 below, a base piece portion, an upper holding piece portion that is in contact with an upper end edge of the base piece portion, an upper holding piece portion that is in contact with an upper piece of the clip metal fitting, and a tip edge of the upper holding piece portion are provided. The upper edge of the clip metal and the upper edge of the upper bent plate of the edge bracket and the upper edge of the upper edge of the bent plate and the lower edge of the base piece are connected to both ends of the edge. The lower holding piece that is in contact with the lower bent plate lower surface, and the lower locking claw portion that is connected to the tip edge of the lower holding side portion and can be locked to the lower bent plate tip edge portion of the field edge receiving bracket There is disclosed a holder for a clip fitting for ceiling base that can hold the clip fitting together with the field edge receiving fitting. Further, in Patent Document 3 below, the first metal fitting is attached to the field edge receiver and the second metal fitting is attached to the field edge, and the first metal fitting is disposed so as to straddle the field edge receiver. The second metal fitting is fitted to the edge so as to be displaceable in the axial direction of the field edge receiver against the impact force generated in the ceiling base structure due to the earthquake, and the second metal fitting sandwiches the field edge lip part of the field edge, and Arranged so as to straddle metal fittings, it can be attached to the field lip of the field edge so that it can be displaced in the axial direction of the field edge against the impact force generated in the ceiling structure due to an earthquake, and can absorb the impact force generated in the ceiling structure A seismic reinforcing metal fitting configured as described above is disclosed.

Japanese Patent Laid-Open No. 2002-267012 Utility model registration No. 3147509 JP 2009-243228 A

  However, when seismic reinforcement is applied to the existing ceiling, it is preferable that the work on the back of the ceiling be possible and that the room underneath can be used during the construction. In addition, the additional work of reinforcing metal fittings described in Patent Documents 1 to 3 requires a large amount of work because of problems such as noise caused by screws and danger of fire caused by welding. In addition, the above-described reinforcing structure using braces is actually present in many places where the braces cannot be inserted depending on the equipment with equipment such as an air-conditioning duct installed behind the ceiling.

  Furthermore, as in Patent Documents 1 to 3, when attaching a reinforcing bracket to a ceiling base material, in order to increase the earthquake resistance, it is necessary to attach the reinforcing bracket to more places. There are concerns about the cost increase due to an increase in the number of parts, as well as a lot of time and effort for the fitting operation. Moreover, since it accompanies the increase in a weight, it will result in the burden on an earthquake-resistant member increasing.

  In addition, the structure for attaching braces and reinforcing brackets as described above is to shorten the natural period of the ceiling by increasing the rigidity of the entire ceiling, but when considering coupling with the natural period of the building, If the natural period of the building itself is a long period, such as a high-rise building, it is thought that it will exhibit some seismic effect without causing resonance, but in the case of a solid structure such as a nuclear facility, the natural period of the building is short. Because it is a period, it tends to resonate with the natural period of the earthquake-proofed ceiling, and it can be assumed that the result of the earthquake-proofing will cause tremendous damage.

  On the other hand, as described above, many damages have been reported in which the ceiling panel falls off during an earthquake. One of the causes of the fall of the ceiling panel is that the joint between each component is slippery. Causes of this slip include (1) collision between the ceiling panel and the surrounding housing such as walls and pillars, and (2) forced deformation that acts on the ceiling panel due to deformation of the surrounding housing, acting repeatedly and continuously. It is thought to be due to this. Therefore, in order to prevent the ceiling panel from falling off, it is important to prevent the joint from slipping, which leads to an improvement in the earthquake resistance of the ceiling structure.

  Therefore, the main problem of the present invention is that the reinforcement work can be simplified, the cost is low, and the natural period of the ceiling is significantly shortened by the seismic reinforcement, thereby preventing the joint from slipping and improving the earthquake resistance. It is to provide a seismic reinforcement structure for the ceiling.

In order to solve the above-mentioned problem, as a first aspect of the present invention, a plurality of suspension bolts provided with hangers are suspended from the building housing at the tip, and are suspended by the hangers at predetermined intervals in the longitudinal direction of the member. A plurality of field ledges are provided in parallel, and a plurality of field edges provided in parallel so as to be orthogonal to the field ledge receiver are connected by a clip at an intersection with the field edge receiver, and the ceiling panel is connected to the field edge. Is a seismic reinforcement mechanism for the ceiling,
The ceiling panel and the field edge contact portion, the field edge and the clip contact portion, the clip and the field edge contact portion, and the field edge and the hanger contact portion are respectively liquid or viscous. An anti-seismic reinforcing structure for a ceiling is provided, which is coated or injected with an adhesive.

  In the first aspect of the present invention, a plurality of suspension bolts provided with hangers at the tip are suspended from a building frame such as a floor slab or a beam, which is a general ceiling structure, and a predetermined interval in the longitudinal direction of the member. A plurality of field ledges hooked by the hanger are provided in parallel at a position, and a plurality of field edges provided in parallel so as to be orthogonal to the field ledge receiver are connected by a clip at an intersection with the field edge receiver. The seismic reinforcement is applied to a ceiling panel fixed to the field edge.

  Specifically, a contact part between the ceiling panel and the field edge, a contact part between the field edge and the clip, a contact part between the clip and the field edge receiver, and a contact part between the field edge receiver and the hanger, respectively. By applying a liquid or viscous adhesive, the adhesive is allowed to enter the gaps between the contact portions by surface tension. As a result, it is possible to prevent slippage of the joint between the metal hanger, the field edge receiver, the field edge, and the respective components of the clip, and to prevent damage leading to falling off of the ceiling panel. Since it is not firmly fixed by the reinforcing bracket, the natural period of the entire ceiling is not significantly shortened, and resonance with a short-period building does not occur during an earthquake. In addition, since the adhesive is applied or injected into the contact portion between the ceiling panel and the field edge, it is possible to prevent the ceiling panel from falling off from the field edge during an earthquake.

As the present invention according to claim 2, the field edge and the field edge receiver are made of a cross-sectional groove-shaped material,
A gap portion formed between the groove portion of the field edge and the clip, a gap portion formed between the groove portion of the field edge receiver and the clip, and a groove portion of the field edge receiver and the hanger. 2. The ceiling seismic reinforcement structure according to claim 1, wherein each of the formed gap portions is filled with an epoxy-based or clay-based curable material.

  In the invention according to claim 2, when a cross-section groove shape is used for the field edge and field edge receiver, a gap portion formed between the field edge groove part and the clip, the field edge receiver The gap portion formed between the groove portion and the clip and the gap portion formed between the groove portion and the hanger are filled with an epoxy-based or clay-based curable material, respectively. It is a thing. Thereby, it becomes possible to prevent slipping between the members even with respect to the gap of the groove portion. The “curable material” refers to a material that can be arbitrarily deformed in the initial state, such as epoxy resin, clay, or gypsum, and exhibits a property of curing after drying.

  According to a third aspect of the present invention, there is provided a ceiling earthquake-proof reinforcement structure according to any one of the first and second aspects, wherein the adhesive or the curable material is applied or filled after the ceiling is assembled.

  The invention described in claim 3 is a preferred work procedure for applying a liquid or viscous adhesive or filling an epoxy or clay curable material, which is performed after the ceiling is assembled. is there.

  As the present invention according to claim 4, there is provided a seismic reinforcement structure for a ceiling according to any one of claims 1 and 2 for an existing ceiling.

  The invention according to the fourth aspect performs seismic reinforcement for the existing ceiling. Since the seismic retrofitting work simply applies or injects an adhesive to each contact portion, the work can be greatly simplified, and the cost burden of reinforcing metal fittings can be reduced and the cost can be reduced. In addition, since the work is completed behind the ceiling and no problem of noise or risk of fire occurs, it is possible to continue using the lower room as usual even during construction.

  As described above in detail, according to the present invention, the reinforcement work can be simplified, the cost can be reduced, and the seismic reinforcement can suppress the slip of the joint without significantly shortening the natural period of the ceiling, thereby improving the earthquake resistance. An improved ceiling seismic reinforcement structure can be provided.

It is a perspective view of the earthquake-proof reinforcement ceiling 1 which concerns on this invention. It is a principal part enlarged view of FIG. It is a front view which shows the construction point of earthquake-proof reinforcement. It is the IV-IV line arrow directional view of FIG. It is a perspective view of the hanger 3. FIG. It is a perspective view of the field edge 5. FIG. It is a perspective view of the clip 6. FIG. In the case of the back of the clip 6, (A) is a front view, and (B) is a cross-sectional view. In the case of the clip 6 being hung, (A) is a front view and (B) is a cross-sectional view. It is a perspective view of the conventional ceiling structure 50. FIG. It is a perspective view of the conventional earthquake-proof reinforcement ceiling structure 60. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The earthquake-proof reinforced ceiling 1 according to the present invention can be widely adopted for a suspension ceiling structure that is generally widely constructed. As a typical example of a general ceiling structure, as shown in FIGS. 1 to 4, there are a plurality of suspension bolts 2, 2... Having a hanger 3 at the tip from a building frame such as a floor slab or a beam. A plurality of field edge receivers 4 that are suspended and hooked by the hanger 3 at predetermined intervals in the longitudinal direction of the member are provided in parallel, and a plurality of field edge receivers 4 are provided in parallel so as to be orthogonal to the field edge receiver 4. The field edges 5, 5... Are connected by the clip 6 at the intersection with the field edge receiver 4, and the ceiling panel 7 is fixed to the field edge 5.

  The representative example of the ceiling 1 will be described in more detail. The hanger 3 is a metal hardware such as iron, stainless steel, aluminum, and the upper end portion is bent at a right angle as shown in FIG. The bent portion 3a is provided with an opening 3b. As shown in FIG. 3, the hanger 3 is fixed to the lower end portion of the suspension bolt 2 by fastening the nut 3a and 2a from above and below with the opening 3b inserted into the tip end portion of the suspension bolt 2. Has been. On the other hand, the lower end portion of the hanger 3 is folded into a substantially U-shape to form a U-shaped portion 3c. The upper open portion of the U-shaped portion 3c is formed so that the distance between both surfaces is slightly narrowed. The field edge receiver 4 can be hooked on the character-shaped portion 3c.

  The field edge receiver 4 is a metal hardware such as iron, stainless steel, or aluminum, and is formed of a cross-sectional groove shape.

  The field edge 5 is also a metal hardware such as iron, stainless steel, and aluminum. As shown in FIG. 6, the field edge 5 is formed of a cross-sectional groove-shaped material, and engaging grooves 5 a and 5 a are formed at the upper end edges of both side surfaces, the end edges being folded inward.

  The clip 6 is also a metal hardware such as iron, stainless steel or aluminum. As shown in FIG. 7, the clip 6 is bent at an upper portion at a substantially right angle, and bifurcated claws 6 a and 6 a are formed at the tip thereof. On the other hand, on both lower sides of the clip 6, engagement pieces 6b, 6b that can be engaged with the engagement grooves 5a, 5a of the field edge 5 are formed. The clip 6 engages the engaging pieces 6b and 6b with the engaging grooves 5a and 5a of the field edge 5 at the intersection of the field edge receiver 4 and the field edge 5 and also connects the claws 6a and 6a to the field edge. By bending along the upper surface of the receiver 4, the field edge receiver 4 and the field edge 5 are connected.

  As shown in FIG. 3, the ceiling panel 7 is fixed to the bottom surface of the field edge 5 by a fixing screw 7 a. The ceiling panel 7 may have a laminated structure of a base material 7A of a finishing material such as a gypsum board and a sound absorbing material 7B such as a rock wool material outside the ceiling panel 7 as illustrated.

  And in this earthquake-proof reinforcement ceiling 1, as FIG. 2-4 shows, the contact part of the said ceiling panel 7 and the field edge 5, the contact part of the said field edge 5 and the clip 6, the said clip 6 and the field edge A liquid or viscous adhesive 8 is applied or injected into a contact portion with the receiver 4 and a contact portion between the edge receiver 4 and the hanger 3, respectively.

  The adhesive 8 can be a general liquid or viscous adhesive that adheres metals, such as a two-component mixed epoxy adhesive, a cyanoacrylic adhesive that bonds instantaneously, a hot A melt adhesive or the like is preferable.

  The adhesive 8 is preferably applied or injected into the joint of each contact portion after the ceiling 1 is assembled. However, the adhesive 8 is applied to the contact portion of each member in advance when the ceiling 1 is constructed. It can also be left. By applying or injecting a liquid or viscous adhesive 8 into the joint of each contact portion, the adhesive 8 enters the gap between the contact portions by surface tension. In general, the surface of the gypsum board constituting the ceiling panel 7 is often finished with a paper-based material, and the paper-based material is usually subjected to a water repellent treatment. It is preferable to apply the above-mentioned adhesive for metal to the contact portion.

  By applying or injecting adhesive to each contact part, it is possible to prevent the contact part between the metals from slipping and to prevent damage leading to the falling off of the ceiling panel 7, while each member is firmly fixed by the reinforcing metal fittings. Because it does not significantly increase the rigidity of the entire ceiling and does not significantly shorten the natural period, it must resonate with the short natural period of a solid structure such as a nuclear facility. Disappears. In addition, since the adhesive 8 is applied or injected into the contact portion between the ceiling panel 7 and the field edge 5, the ceiling panel 7 can be prevented from falling off from the field edge 5 even when the ceiling is greatly shaken by an earthquake.

  Furthermore, this seismic reinforcement work can be applied to existing ceilings as well as new ceilings. This ceiling seismic reinforcement simply applies or injects an adhesive to each contact portion, so that the construction can be greatly simplified, and the cost burden of reinforcing metal fittings can be reduced and the cost can be reduced. In particular, when working on existing ceilings, work is completed behind the ceiling, and noise and fire hazards do not occur. It has the advantage of being able to.

  Here, in the contact portion between the ceiling panel 7 and the field edge 5, as shown in FIG. 2, the adhesive 8 may be continuously applied or injected over the entire length of the field edge 5, but the dotted line. The amount of the adhesive used can be reduced by intermittent application or injection of the shape.

  On the other hand, as shown in FIGS. 4, 8, and 9, a gap formed between the groove portion of the field edge 5 made of the groove-shaped member and the clip 6, and a field made of the groove-shaped member. The gap portion formed between the groove portion of the edge receiver 4 and the clip 6 and the gap portion formed between the groove portion of the field edge receiver 4 and the hanger 3 are respectively cured by epoxy or clay. It is preferable to fill the conductive material 9.

  The curable material 9 may be a material such as an epoxy resin, clay, or gypsum that can be arbitrarily deformed in the initial state and has a property of curing after drying.

  In the gap portion formed between the groove portion of the field edge 5 and the clip 6, an epoxy is used so that the lower end portion of the clip 6 is sandwiched in the longitudinal direction of the member of the field edge 5 as shown in FIGS. It is preferable to fill a curable material 9 based on clay or clay.

  In the gap portion formed between the groove portion of the field edge receiver 4 and the clip 6, the filling state of the curable material 9 varies depending on the attachment state of the clip 6. That is, the clip 6 is hooked from the groove bottom surface side (back side) of the field edge receiver 4 shown in FIG. 8 (back), and the groove opening surface side of the field edge receiver 4 shown in FIG. The case of locking from the abdominal side (hungry) is considered. In the case of the backrest, the curable material 9 can be filled in a gap portion between the claw 6a of the clip 6 and the field edge receiver 4 as necessary. In the case of the bellows, it is preferable to dispose the curable material 9 so as to fill the groove over the entire width of the clip 6.

  In the gap portion formed between the groove portion of the field receiver 4 and the hanger 3, as shown in FIG. 4, an epoxy system is used to fill the groove of the field receiver 4 over the entire width of the hanger 3. Alternatively, it is preferable to dispose a clay-based curable material 9. Further, when the curable material 9 is installed in a groove such as a field edge or a field edge holder to fix the joint metal, steel, plastic or paper is used depending on the fluidity of the curable material 9 before curing. It is also useful to install a weir so that the curing material is disposed only in a predetermined range.

  DESCRIPTION OF SYMBOLS 1 ... Seismic reinforcement ceiling, 2 ... Suspension bolt, 3 ... Hanger, 4 ... Field edge receptacle, 5 ... Field edge, 6 ... Clip, 7 ... Ceiling panel, 8 ... Adhesive, 9 ... Clay type curable material

Claims (4)

A plurality of suspension bolts provided with hangers at the front end portion are suspended from the building frame, and a plurality of field receivers hooked by the hangers at predetermined intervals in the longitudinal direction of the member are provided in parallel. A plurality of field edges provided in parallel so as to be orthogonal to each other are connected by a clip at an intersection with the field edge receiver, and a ceiling earthquake-resistant reinforcement mechanism in which a ceiling panel is fixed to the field edge,
The ceiling panel and the field edge contact portion, the field edge and the clip contact portion, the clip and the field edge contact portion, and the field edge and the hanger contact portion are respectively liquid or viscous. An anti-seismic reinforcement structure for a ceiling, characterized in that an adhesive is applied or injected. The field edge and field edge receiver are made of a cross-sectional groove type material,
A gap portion formed between the groove portion of the field edge and the clip, a gap portion formed between the groove portion of the field edge receiver and the clip, and a groove portion of the field edge receiver and the hanger. 2. The earthquake-proof reinforcement structure for a ceiling according to claim 1, wherein each of the formed gap portions is filled with an epoxy-based or clay-based curable material.   The ceiling or seismic reinforcement structure according to claim 1, wherein the adhesive or the curable material is applied or filled after the ceiling is assembled.   The earthquake-proof reinforcement structure for a ceiling according to any one of claims 1 and 2, which targets an existing ceiling.

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