JP7350575B2 - Expansion joint ceiling structure - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act On March 31, 2019, Takenaka Corporation Co., Ltd. sent Hiroshi Masuoka, Izumi Eto, Koichi Toda, Kenji Shimizu, and Mizutani to the National Cerebral and Cardiovascular Center. We handed over a building (National Cerebral and Cardiovascular Research Center) that adopted the expansion joint wall, floor, and ceiling structures invented by Kenichi, Toshihiro Fujii, and Tatsuo Takahashi.

The present invention relates to an expansion joint ceiling structure that includes a ceiling panel that is provided in a communication section that communicates between two adjacent buildings so as to cover the gap between the ceiling sections of both buildings.

An expansion joint ceiling structure is known that includes a ceiling panel provided in a communication section that communicates between two adjacent buildings to cover the gap between the ceiling sections of both buildings (for example, Patent Document (See Figure 27, etc. of 1).
The ceiling structure described in Patent Document 1 is constructed over two buildings and includes a support fitting that holds a central guide rail in the center of the gap while allowing relative displacement between the two buildings, and a ceiling panel is attached to the lower end. The suspension bar is configured to be supported by a support frame depending from the central guide rail. Furthermore, in the ceiling structure described in Patent Document 1, the hanging bar for attaching the ceiling panel to the lower end is located lower than the ceiling portions on both building sides. If the relative positional relationship between the two buildings changes due to an earthquake, etc., the hanging bar that attaches the ceiling panel to the lower end will move in the in-plane direction along the lower surface of the ceiling on both buildings. This keeps the gap covered.

Patent No. 3382567

However, in the ceiling structure of the expansion joint described in Patent Document 1, the hanging bar for attaching the ceiling panel to the lower end is located below the ceiling on the building side, so the lower surface of the ceiling panel and the building side when viewed from below. This creates a relatively large level difference between the lower surface of the ceiling and the lower surface of the ceiling, which impairs the design. In addition, in order to reduce this level difference as much as possible, it is possible to use a ceiling panel with high shape retention and reduce the thickness of the hanging bar to which it is attached. As a result, the weight of the ceiling panel increases, resulting in a problem in that the workability of the ceiling panel and the safety in case it falls off are impaired.

In view of this situation, the main problem of the present invention is to provide an expansion joint that is provided with a ceiling panel that covers the gap between the ceilings on both building sides in a communication section that connects two adjacent buildings. To provide a technology capable of reducing the height difference between the lower surface of the ceiling panel and the lower surface of the ceiling part on the building side as much as possible in a ceiling structure to improve the design and to reduce the weight of the ceiling panel.

A first characteristic configuration of the present invention is an expansion joint ceiling structure including a ceiling panel provided in a connecting part that communicates between two adjacent buildings so as to cover the gap between the ceiling parts on both building sides. And,
comprising a center frame holding mechanism section that is constructed across the two buildings and holds the center frame at the center in the far and near direction between the two buildings while allowing relative displacement between the two buildings;
a ceiling frame to which the ceiling panel is mounted at a lower end; the ceiling frame is supported in a scale-like manner by a support frame located above the ceiling on the building side and suspended from the center frame ;
The ceiling frame includes: a beam arranged below the center frame and parallel to the center frame; an upper frame extending toward the building from a base end fixed to the beam; a lower frame arranged below the upper frame and parallel to the upper frame on each of both sides of the beam in the perspective direction of the building; and a plurality of connecting members connecting the upper frame and the lower frame. configured with
A receiving member configured to be elongated along the beam is fixed to the lower surface of the beam, and a base end portion of the ceiling panel is placed on both outer sides of the receiving member in the far and near direction. A receiving surface is formed,
A long receiving member is fixed to the lower surface of the end of the lower frame on the building side along the beam material, and the tip of the ceiling panel is placed on the inside of the receiving member in the distance direction. A receiving surface is formed,
The ceiling part on the building side is suspended and supported by a hanging material fixed to the frame of the building,
The hanging member is disposed at a position further outward along the distance direction than the end of the ceiling frame on the building side when the two buildings are relatively close to each other. .

According to this configuration, the ceiling frame to which the ceiling panel is attached at the lower end is located above the ceilings of both buildings, so if the relative positional relationship between the two buildings changes due to an earthquake, etc. The ceiling panel attached to the lower end of the ceiling frame moves in the in-plane direction along the upper surface of the ceiling on both building sides, so that the gap can be kept covered. In addition, in this configuration, since the lower surface of the ceiling panel is placed along the upper surface of the ceiling on both building sides, the level difference between the lower surface of the ceiling panel and the lower surface of the ceiling on the building side is approximately the same as that of the ceiling when viewed from below. It can be made relatively small, close to the thickness. In addition, since the ceiling on the building side does not interfere with the installation area of the ceiling frame with the ceiling panel attached to the lower end, the ceiling frame is configured to be relatively strong and the ceiling frame is installed and supported at the lower end. As a ceiling panel, it is possible to use one that is lightweight but has poor shape retention.

Therefore, according to the present invention, in the ceiling structure of an expansion joint that includes a ceiling panel provided in a connecting part that communicates between two adjacent buildings so as to cover the gap between the ceiling parts of both buildings, It is possible to provide a technology that can improve the design by minimizing the level difference between the lower surface of the panel and the lower surface of the ceiling on the building side, and can also reduce the weight of the ceiling panel.

A second characteristic configuration of the present invention is that the ceiling panel includes a ceiling base material made of a rectangular fibrous board material, and splints for suppressing deflection deformation attached to at least each of both side portions of the ceiling base material. The point is that it is made up of.

According to this configuration, in the ceiling structure of the expansion joint, it is possible to employ a highly safe ceiling panel in which the ceiling base material is made of a fibrous board material. That is, this ceiling panel has splints for suppressing bending deformation attached to at least both side portions of a ceiling base material made of a rectangular fibrous plate material. When supporting the central part of the ceiling frame with the ceiling panel attached to the lower end by the support frame hanging from the center frame, the ceiling frame supports a pair of splints attached to each side of the ceiling panel. By doing so, the posture of the pair of splints is maintained in a stable state in a state where they extend along the upper surfaces of the ceiling portions on both building sides. Therefore, the flexural deformation of the ceiling base material made of fibrous board material provided between the pair of splints is suppressed by the pair of splints whose posture is stabilized, and as a result, the ceiling panel is stabilized. It can be installed in a fixed position.

A third feature of the present invention is that a gap is provided between the lower surface of the ceiling panel attached to the lower end of the ceiling frame and the upper surface of the ceiling portions on both building sides.

According to this configuration, a gap is provided between the lower surface of the ceiling panel attached to the lower end of the ceiling frame and the upper surface of the ceilings on both building sides, so the relative positional relationship between the two buildings is When the ceiling panels move in the in-plane direction along the upper surfaces of the ceilings on both buildings, the ceiling panels are prevented from coming into contact with the ceilings on both buildings. Damage to the ceiling panel due to contact can be prevented.

Elevation view of the ceiling structure according to the embodiment in a normal state Elevation view of the ceiling structure according to the embodiment in a close state Elevation view of the ceiling structure according to the embodiment in a separated state An exploded perspective view showing an installed state of a ceiling panel in a ceiling structure according to an embodiment. Enlarged view of the fixing mechanism (a) Exploded view of the ceiling panel, (b) Cross-sectional view of the ceiling panel in the short direction Plan view of center frame holding mechanism in normal state Plan view of the center frame holding mechanism in close proximity Plan view of center frame holding mechanism in separated state

Embodiments of the present invention will be described based on the drawings.
FIG. 1 shows an expansion joint ceiling structure 100 (hereinafter referred to as "main ceiling structure") in a normal state where the width of the gap 3 between two buildings 1 and 2 (distance between buildings 1 and 2) is the normal width. 100''), FIG. 2 shows the state of the ceiling structure 100 in a close state where the width of the gap 3 is reduced compared to the normal state, and FIG. The present ceiling structure 100 is shown in a separated state in which the width of the gap 3 is expanded compared to the normal state.

This ceiling structure 100 is constructed over the two buildings 1 and 2 to allow relative displacement between the two buildings 1 and 2, and has a center frame in the center in the far and near direction X between the two buildings 1 and 2. A center frame holding mechanism section 50 for holding the frame 51 is provided. Note that a known configuration can be adopted as the configuration of the center frame holding mechanism section 50, and the detailed configuration in this embodiment will be described later.

This ceiling structure 100 has a connecting part 5 that connects two adjacent buildings 1 and 2, which covers the gap 3 between the ceiling panels 7 (an example of a ceiling part) on both sides of the buildings 1 and 2. A ceiling panel 20 is provided, and the ceiling panel 20 is provided on both sides of the center frame 51 in the perspective direction X. The present ceiling structure 100 has a substantially bilaterally symmetrical structure with the center frame 51 in between.
Since the ceiling panels 20 are provided on both sides of the center frame 51 held in the center of the gap 3 between the buildings 1 and 2, even if the gap 3 between the buildings 1 and 2 is wide. While each ceiling panel 20 is made smaller with a width less than half, the width of each ceiling panel 20 can be made uniform to improve the design.

A ceiling frame 10 is provided to which a ceiling panel 20 is attached at its lower end. The ceiling frame 10 is supported in a scale-like manner by a support frame 40 located above the ceiling panels 7 on the buildings 1 and 2 and suspended from a center frame 51.

Specifically, a plurality of support frames 40 are fixed to the lower surface of the center frame 51 as hanging members for suspending and supporting a ceiling frame 10, which will be described later.
On the other hand, the ceiling frame 10 is connected to a beam 15 disposed below a center frame 51 and parallel to the center frame 51, and from a base end fixed to an upper flange of the beam 42 on both sides of the beam 42. An upper frame 11 extending toward the 1 and 2 sides, a lower frame 12 arranged below each upper frame 11 on both sides and parallel to the upper frame, and connecting the upper frame 11 and the lower frame 12. A plurality of connecting members 13 are provided. Note that although the connecting member 13 is shown in the figure as being along the vertical direction, it may be in an inclined position with respect to the vertical direction depending on the situation.
The beam material 15 of the ceiling frame 10 is fixed to the lower end of the ceiling frame 10.

A receiving member 31 made of elongated metal is fixed to the lower surface of the beam 15 along the beam 15 . The receiving member 31 made of such metal also functions as a parting member that covers the gap between the ceiling panels 20 arranged on both sides of the beam 15. Further, on both outer sides of the receiving member 31, receiving surfaces 31a on which the base end portion 20a of the ceiling panel 20 is placed are formed as stepped portions.
On the other hand, on the lower surface of the end of the lower frame 12 on the side of the buildings 1 and 2, a receiving member 17 made of a long metal piece is fixed along the beam 42. A receiving surface 17a is formed inside the receiving member 17, on which the tip end 20b of the ceiling panel 20 is placed.

The ceiling panels 7 provided on the sides of the buildings 1 and 2 are suspended and supported by hanging members 8 fixed to the frames of the buildings 1 and 2. This hanging member 8 is placed at a position further outside the end of the ceiling frame 10 on the buildings 1 and 2 side along the distance direction , interference between the ceiling frame 10 and the hanging material 8 is avoided. As a result, the ceiling panel 7 is held in a state protruding from the fixed position of the hanging member 8 toward the gap 3 side.
The lower surface of the ceiling panel 20 attached to the lower end of the ceiling frame 10 in the gap 3 forms a gap 45 of an appropriate width between the upper surface of the ceiling panel 7 on each of the buildings 1 and 2, It is arranged above the ceiling panel 7.

In the present ceiling structure 100 configured as described above, the ceiling frame 10 on which the ceiling panel 20 is mounted at the lower end is located above the ceiling panels 7 on both buildings 1 and 2 sides. As a result, if the relative positional relationship between the two buildings 1 and 2 changes due to an earthquake or the like and changes from the normal state shown in Fig. 1 to the close state shown in Fig. 2 or the separated state shown in Fig. 3, , the ceiling panel 20 moves in the in-plane direction along the upper surfaces of the ceiling panels 7 on both buildings 1 and 2, so that the gap 3 is kept covered.

Furthermore, since the lower surface of the ceiling panel 20 is placed along the upper surface of the ceiling panel 7 on both the buildings 1 and 2 side, the lower surface of the ceiling panel 20 and the ceiling panel on the building 1 and 2 side are The difference in level from the lower surface of panel 7 is relatively small, approximately close to the thickness of ceiling panel 7. Further, since the gap 45 is provided between the lower surface of the ceiling panel 20 and the upper surface of the ceiling panel 7, contact between the ceiling panels 7 and 20 is suppressed.
Moreover, in the installation area of the ceiling frame 10 above the ceiling panel 20, the ceiling panels 7 on the building 1 and 2 sides do not interfere. This makes it possible to configure the ceiling frame 10 to be relatively strong, and to use a lightweight ceiling panel 20 that is attached and supported on the lower end of the ceiling frame 10, although its shape retention is poor.

[Ceiling panel and its fixing mechanism]
Next, details of the ceiling panel 20 and its fixing structure will be explained based on FIGS. 4 to 6.
As shown in FIG. 6, the ceiling panel 20 is configured as a rectangular plate-shaped lightweight ceiling material whose main component is a ceiling base material 21 made of a lightweight fibrous material. That is, the ceiling panel 20 includes a ceiling base material 21 formed of glass wool, which is an example of a fibrous material, into a rectangular plate shape, and a ceiling base material 21 that is attached to each of both sides 21a of the ceiling base material 21. A strip-shaped splint 22 for suppressing deflection deformation of the ceiling base material 21 and a non-combustible or flame-retardant flexible surface material 23 covering the lower surface of the ceiling base material 21 are provided. There is.

The splint 22 for suppressing bending deformation is made of, for example, an elongated strip-shaped plate made of aluminum alloy, steel, or the like. The width dimension (height dimension along the vertical direction in FIG. 6) of the splint 22 is the same or approximately the same as the height dimension (thickness dimension) of the ceiling base material 21. Further, the length of the splint 22 is the same or approximately the same as the length of the long side of the outer periphery of the ceiling base material 21 . The splint 22 is bonded to the entire end surface of each of the pair of long sides of the ceiling base material 21 using an adhesive such as an adhesive so as to cover the entire end surface of each of the long sides of the ceiling base material 21. .

With this splint 22, the bending rigidity of the ceiling base material 21 is appropriately and efficiently reinforced while suppressing an increase in weight as much as possible. Therefore, when the ceiling panel 20 is installed between the splints 22, the longitudinal intermediate portion of the ceiling panel 20 is prevented from hanging down. Moreover, when the ceiling panel 20 is installed on the receiving surfaces 31a, 17a of the pair of receiving members 31, 17 facing each other along the longitudinal direction of the ceiling panel 20 (see FIG. 1), both sides of the ceiling base material 21 The splint 22 joined to the entire area of the portion 21a can also be installed on the pair of receiving surfaces 31a, 17a. Therefore, the ceiling panel 20 is appropriately installed in a state where it is difficult to fall.
In this embodiment, the splints 22 are attached only to both sides 21a of the ceiling base material 21, but similar splints 22 may be attached to sides other than both sides 21a. I don't mind.

The non-combustible or flame-retardant surface material 23 is made of a material such as glass paper, and is wrapped around both sides 21a of the ceiling base material 21 on which the splint material 22 is placed. It is configured to cover the lower surface, the both sides 21a, and the both sides 21a of the upper surface. The surface material 23 is bonded to splints 22 adhesively bonded to both sides 21a of the ceiling base material 21 using an adhesive or other bonding means, with tension applied to eliminate wrinkles.

As shown in FIGS. 1, 4, and 5, the top end 20b of the ceiling panel 20 rests on the receiving surface 17a of the receiving member 17 fixed to the lower surface of the edge of the ceiling frame 10 on both buildings 1 and 2 sides. In the placed state, the base end portion 10a is placed and fixed on the receiving surface 31a of the receiving member 31 fixed to the central lower surface of the ceiling frame 10.

The fixing mechanism section 30 that fixes the base end 20a of the ceiling panel 20 to the receiving surface 31a of the receiving member 31 is provided with a restraining member 32 installed on the upper surface 20c of the ceiling base material 21 of the ceiling panel 20. There is.
As shown in FIG. 4, the restraining member 32 is configured as a metal fitting that spans the entire width of the ceiling panel 20 along the longitudinal direction of the receiving member 31. Further, the restraining member 32 is configured to be installed on the upper surface 20c of the ceiling base material 21 of the ceiling panel 20 and fixed to the receiving member 31 with the base end 20a of the ceiling panel 20 placed on the receiving member 31. has been done.

As shown in FIG. 4, the fixing mechanism section 30 is configured to hold the splint 22 of the ceiling panel 20 between a restraining member 32 and a receiving member 31. That is, a pair of splints 22 attached to each of the both sides 21a of the ceiling base material 21 in the ceiling panel 20 connects the receiving member 31 on which the base end 20a of the ceiling panel 20 is placed, and the ceiling panel 20. It is held between a band-shaped restraining member 32 that crosses the upper surface 20c of the.

The posture of the pair of splints 22 is maintained in a stable state in a state where they extend from the base end 20a on the fixing mechanism section 30 side toward the distal end side. Therefore, the ceiling base material 21 made of fibrous board material provided between the pair of splints 22 is suppressed from being bent or deformed by the pair of splints 22 whose posture is stabilized, and as a result, the ceiling base material 21 is made of a fibrous board material provided between the pair of splints 22. 20 will be installed in a stable position.

The restraining member 32 includes a band-shaped portion 32A that traverses the upper surface 20c of the ceiling panel 20 along the longitudinal direction of the receiving member 31, and an outer surface 22a of the splint 22 of the ceiling panel 20 ( (see FIG. 6), and a notch formed in the ceiling base material 21 that protrudes downward from the end of the band-shaped portion 32A on the slide mechanism 60 side. 32C of piercing parts inserted into 21b.

By employing such a restraining member 32, when attaching the restraining member 32 to the ceiling panel 20, the belt-shaped portion 32A of the restraining member 32 can be placed along the upper surface 20c of the ceiling base material 21 of the ceiling panel 20. By aligning the folded piece portions 32B bent from both ends of the band-shaped portion 32A along the outer surface 22a of the splint 22 of the ceiling panel 20, the restraining member 32 can be easily and accurately positioned. Then, the posture of the splint 22 held between the holding member 32 and the receiving member 31 is maintained accurately and more stably, and the ceiling panel 20 whose shape is defined by the splint 22 is It is mounted in a more stable position. Further, since the piercing portion 32C formed protrudingly on the restraining member 32 is inserted into the notch portion 21b of the ceiling base material 21, displacement of the highly flexible ceiling base material 21 in the ceiling panel 20 is suitably prevented. There is.

The restraining member 32 installed on the upper surface 20c of the base end 20a of the ceiling panel 20 is placed along the longitudinal direction of the restraining member 32 with respect to the receiving member 31 on which the base end 20a of the ceiling panel 20 is placed. It is fixed by a plurality of screws 36 arranged at the same time. Further, these screws 36 are inserted into screw holes 32a formed in the holding member 32 from above, penetrate through the ceiling base material 21, and then screwed into screw holes 31b formed in the receiving surface 31a of the receiving member 31. installed to match. That is, the screw 36 passes through the ceiling base material 21 of the ceiling panel 20, extending between the restraining member 32 and the receiving member 31 that sandwich the top and bottom of the ceiling base material 21. Therefore, the screws 36 suitably prevent the ceiling base material 21, which is highly flexible, from shifting in the ceiling panel 20. In addition, when using a drill screw that does not require a prepared hole as the screw 36, it is not necessary to form the screw holes 31b and 32a in advance.

[Center frame retention structure]
Next, the detailed configuration of the center frame holding mechanism section 50 used in each of the above-described embodiments will be explained based on FIGS. 7 to 9.
Note that FIG. 7 shows the state of the center frame holding mechanism section 50 in a normal state in which the width of the gap 3 between the two buildings 1 and 2 (the distance between the buildings 1 and 2) is the normal width. 8 shows the state of the center frame holding mechanism section 50 in a close state in which the width of the gap 3 is reduced compared to the normal state, and FIG. The state of the center frame holding mechanism section 50 is shown in an enlarged separated state compared to the state shown in FIG.

The center frame holding mechanism section 50 is disposed above the ceiling frame 10 and is installed between the buildings 1 and 2.
A plurality of first connecting beams 55 and a plurality of second connecting beams 57 are spanned over each of the buildings 1 and 2, respectively.

The first connecting beam 55 is provided with a pair of movable shafts 56 that are slidable along the longitudinal direction of the connecting beam 55 . Further, each movable shaft 56 engages with a rail 6 disposed in each building 1, 2, and is held slidably along the rail 6. In each of the buildings 1 and 2, the rail 6 extends in a direction (horizontal direction in FIGS. 7 to 9) perpendicular to the perspective direction X (vertical direction in FIGS. 7 to 9) between the buildings 1 and 2 in plan view. located along.
A plurality of first connecting beams 55 are provided along the longitudinal direction of the center frame 51 constituting the center frame 51, and adjacent first connecting beams 55 are arranged such that the angles at which they incline with respect to the longitudinal direction of the center frame 51 are different. It is located.

The second connecting beam 57 is provided with a pair of movable shafts 58 that are slidable along the longitudinal direction of the connecting beam 57 . Further, each of the movable shafts 58 is joined to each of the buildings 1 and 2 so as to be rotatable around an axis along the vertical direction. A plurality of second connecting beams 57 are provided along the longitudinal direction of the center frame 51, and are arranged parallel to each other.

In the center frame holding mechanism section 50, a center frame 51 made of H-beam steel is arranged parallel to the facing surfaces of the buildings 1 and 2 during normal times. The center frame 51 is an example of a center frame in the present invention, and is arranged at the center of the gap 3 between the buildings 1 and 2.

The center frame 51 is placed on a first connecting beam 55 and a second connecting beam 57 via a pivot portion 52 . The pivot portion 52 is connected to the center frame 51 so as to be rotatable about an axis along the vertical direction, and the connection beam 55 is connected to the first connection beam 55 and the second connection beam 57. , 57 are slidably joined along the longitudinal direction.

The center frame holding mechanism section 50 as described above maintains the center frame 51 at the center in the far/near direction X between the two buildings 1 and 2, and changes from the normal state shown in FIG. 7 to the close state shown in FIG. The state can be changed to the separated state shown in FIG.

In other words, if a horizontal force due to an earthquake acts on buildings 1 and 2 from the normal state shown in Fig. 7, in which no earthquake force is acting, and the buildings 1 and 2 are relatively displaced in the direction toward each other, the buildings 1 and 2 The positional relationship between 1 and 2 is in a close proximity state as shown in FIG.
On the other hand, if a horizontal force due to an earthquake acts on buildings 1 and 2 and the buildings 1 and 2 are displaced relative to each other in a direction away from each other from the normal state shown in Fig. 7, where no seismic force is acting, The positional relationship between 1 and 2 becomes a separated state as shown in FIG.
That is, when the state changes from the normal state shown in FIG. 7 to the close state shown in FIG. 8 or the separated state shown in FIG. The first connecting beam 55 rotates around the pivot portion 52 of the center frame 51, and the movable shafts 58 provided in the buildings 1 and 2 slide along the second connecting beam 57. . At this time, since the pivot portion 52 is disposed at the axial center of the first connecting beam 55, the center frame 51 is held at the center of the gap 3 between the buildings 1 and 2.

[Another embodiment]
Other embodiments of the present invention will be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.

(1) In the above embodiment, the ceiling panel 20 includes a ceiling base material 21 made of a rectangular fibrous plate material, and splints for suppressing bending deformation attached to at least each of both side portions of the ceiling base material 21. 22, however, the structure of the ceiling panel 20 may be changed as appropriate.

(2) In the above embodiment, the gap 45 was provided between the lower surface of the ceiling panel 20 and the upper surface of the ceiling panel 7 on both buildings 1 and 2. However, without providing such a gap 45, the ceiling panel 20 , 7 may be arranged so as to be in contact with each other above and below.

1 Building 2 Building 3 Gap 5 Communication section 7 Ceiling panel 10 Ceiling frame 20 Ceiling panel 21 Ceiling base material 22 Splint 40 Support frame 45 Gap 50 Center frame holding mechanism section 51 Center frame 100 Ceiling structure X Perspective direction

Claims (3)

An expansion joint ceiling structure comprising a ceiling panel provided to cover the gap between the ceilings on both building sides in a communication section that communicates between two adjacent buildings,
comprising a center frame holding mechanism section that is constructed across the two buildings and holds the center frame at the center in the far and near direction between the two buildings while allowing relative displacement of the two buildings;
a ceiling frame to which the ceiling panel is mounted at a lower end; the ceiling frame is supported in a scale-like manner by a support frame located above the ceiling on the building side and suspended from the center frame ;
The ceiling frame includes: a beam arranged below the center frame and parallel to the center frame; an upper frame extending toward the building from a base end fixed to the beam; a lower frame arranged below the upper frame and parallel to the upper frame on each of both sides of the beam in the perspective direction of the building; and a plurality of connecting members connecting the upper frame and the lower frame. configured with
A receiving member configured to be elongated along the beam is fixed to the lower surface of the beam, and a base end portion of the ceiling panel is placed on both outer sides of the receiving member in the far and near directions. A receiving surface is formed,
A long receiving member is fixed to the lower surface of the end of the lower frame on the building side along the beam material, and the tip of the ceiling panel is placed on the inside of the receiving member in the distance direction. A receiving surface is formed,
The ceiling part on the building side is suspended and supported by a hanging material fixed to the frame of the building,
The hanging member is an expansion joint that is disposed at a position further outward in the distance direction than the end of the ceiling frame on the building side when the two buildings are relatively close to each other. ceiling structure. Claim 1: The ceiling panel is composed of a ceiling base material made of a rectangular fibrous board material, and splints for suppressing bending deformation attached to at least both side portions of the ceiling base material. Expansion joint ceiling structure described in . 3. The expansion joint ceiling structure according to claim 1, wherein a gap is provided between the lower surface of the ceiling panel attached to the lower end of the ceiling frame and the upper surface of the ceiling parts on both building sides.

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