JP3083455B2 - Unit building ceiling structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling structure of a unit building.

[0002]

2. Description of the Related Art A unit building is disclosed in Japanese Patent Publication No. 62-6222.
As described in Japanese Patent No. 4 gazette, a box-shaped building unit of fixed size that can be transported, and inside and outside finished building units are manufactured in advance in a factory, transported to a construction site, and transported to a construction site. They are assembled into buildings. The frame unit building has been gradually and widely adopted because it has a feature that it is a standardized building having a short on-site construction period and high dimensional accuracy. The skeleton of this building unit has four pillars, four ceiling beams, and four floor beams assembled in a box shape.

[0003] There are various types of ceiling structures of this building unit, and in particular, in order to improve fire prevention performance and fire resistance performance,
As described in Japanese Utility Model Publication No. 1-25134, there is known a structure in which a wooden ceiling beam is inserted between opposing ceiling beams, and ceiling materials having good fire prevention performance are respectively provided above and below the ceiling beam. This building unit can prevent the spread of fire when the ceiling material on the underside of the ceiling beam is destroyed or burnt down in the event of a fire, because there is another ceiling material above the ceiling beam. It is preferable because the performance and fire resistance are improved.

[0004]

However, since a unit building transports a building unit manufactured at a factory to a construction site and assembles a plurality of the building units at the construction site, the factory uses a building unit and a building unit. Ceiling material cannot be attached to the ceiling between the two. Therefore, after a building unit is installed at a construction site, a ceiling material is attached between a ceiling material of a building unit and a ceiling material of an adjacent building unit, and both ceiling materials are connected.

[0005] However, since the building unit has the ceiling beam spanned between the opposing ceiling beams, when the building units are installed side by side, both the ceiling beam and the ceiling beam of the building unit are interposed. There are ceiling beams. Therefore, it is difficult to attach the ceiling material between the building unit and the adjacent building unit because the ceiling beam is in the way. Therefore, conventionally, the ceiling beam is shifted downward, and the lower surface of the ceiling beam is projected from the lower surface of the ceiling beam. The ceiling material is passed to the lower part of the ceiling beam of the adjacent building unit and attached to both ceiling beams. Since the height of the ceiling beam is generally lower than the height of the ceiling beam, if the lower surface of the ceiling beam is mounted lower than the lower surface of the ceiling beam as described above, the upper surface of the ceiling beam will be lower than the upper surface of the ceiling beam. Therefore, the ceiling material attached to the upper surface of the ceiling beam cannot be attached because the ceiling beam is in the way. In other words, the ceiling material stretched on the ceiling beam does not exist between the building unit and the adjacent building unit.

[0006] Therefore, in the above case, there is a problem that the fire protection performance or fire resistance performance between this building unit and an adjacent building unit is inferior, and as a result, the overall fire protection performance or fire resistance performance is inferior. Therefore, an object of the present invention is to provide a ceiling structure of a unit building in which the fire protection performance or fire resistance performance between the ceiling material of a building unit and the ceiling material of an adjacent building unit is not inferior.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and the invention according to claim 1 has four pillars, four ceiling beams, and four floor beams. DOO is a ceiling structure of the unit building assembling a plurality of building unit having a skeleton assembled into a box shape, facing the ceiling
A wooden ceiling beam is attached to the beam, and the lower side of the ceiling beam is the surrounding ceiling beam.
Projecting below the lower surface of the ceiling,
Gypsum board is attached to the upper surface of the beam, and the lower surface of the ceiling beam
Gypsum board is installed in the center except for the periphery of the ceiling beam
Around the ceiling beam, which is not covered with gypsum board
The lower surface of the ceiling beam is made higher than the center, and the gypsum board
And the rock wool sound-absorbing plate are under the ceiling beam of the building unit
From below the ceiling of the next building unit passing below the ceiling beam
Both ceiling smalls that extend over the underside of the girder and are higher than the center
Attached to the beam, the bottom of the plasterboard in the center and the periphery of the ceiling
The bottom of the plaster board on the side is made almost at the same height,
Of gypsum board and ceiling girder attached to the underside of well girder
Rock wool between gypsum board mounted on top
Is provided .

As the gypsum board used in the first aspect of the present invention, a commercially available gypsum board can be used as it is, but a reinforced gypsum board containing glass fiber in gypsum is particularly preferable.

In the present invention, the JIS-A-1304 is used.
As a preferred combination of ceiling materials that pass the 60-minute fire resistance test specified in, the thickness of the gypsum board attached to the lower surface of the ceiling girder is about 15 mm, and the thickness of the gypsum board attached to the upper surface of the ceiling girder is about 12 mm And a rock wool having a thickness of about 50 mm is attached between them. It is preferable that the thickness of the gypsum board attached between the lower ceiling material of the building unit and the lower ceiling material of the adjacent building unit is about 12 mm, and the thickness of the rock wool is 9 mm.

According to the first aspect of the present invention, the lower surface of the gypsum board at the center and the lower surface of the gypsum board at the periphery of the ceiling are formed at substantially the same height.
In a ceiling structure that passes the 60-minute fire test specified in 04, the lower surface of the ceiling beam around the ceiling beam is approximately 6 m from the center.
m higher, about 1 attached to the lower surface of the central part of the ceiling beam
5mm gypsum board and thickness of about 1 to be attached to the peripheral piece of the ceiling girder from the periphery of the ceiling girder to the next building unit
The lower surface of the ceiling made up of a 2 mm gypsum board and a rock wool sound absorbing plate having a thickness of about 9 mm has almost the same height.

In the first aspect of the present invention, the gypsum board and the rock wool sound-absorbing plate are attached. At this time, the gypsum board and the rock wool may be provided separately. However, since the ceiling material between the ceiling material of the building unit and the ceiling material of the adjacent building unit is attached at the construction site, it is preferable that the ceiling material is as simple as possible. From this sense, as in the invention of claim 2, wherein the plasterboard and rock wool the sound absorbing plate previously attached Awashi a laminate, it is preferable to mount it.

That is, the invention according to claim 2 is the ceiling structure of a unit building according to claim 1 , wherein the gypsum board and the rock wool sound-absorbing plate are laminated to form a laminate, and the laminate is a ceiling of the building unit. The beam passes under the ceiling beam from the lower surface of the beam and extends to the adjacent ceiling beam, and is attached to both ceiling beams.

[0013]

According to the first aspect of the present invention, the ceiling of the building unit is provided.
Between wells and building units and adjacent building units
A special combination of ceiling materials is used,
Excellent performance and fire prevention performance. Especially on the underside of the ceiling beam.
The thickness of the gypsum board to be attached is about 15 mm,
The thickness of the gypsum board attached to the upper surface is about 12 mm,
During this time, attach rock wool with a thickness of about 50 mm,
Of the lower part of the product unit and the lower part of the adjacent building unit
The thickness of the gypsum board attached to the ceiling material is about 12m
m, the thickness of rock wool is 9 mm, JIS-A
It can withstand the 60 minute fire test specified in -1304.
Wear.

[0014] In addition, in this combination of ceiling materials, building
The thickness of the ceiling material attached to the underside of the knit ceiling beam
And between the building unit and the next building unit
Although the thickness of the ceiling material is different, in the present invention,
The bottom surface of the gypsum board and the bottom surface of the gypsum board around the ceiling
Because they are almost at the same height, the ceiling of the building unit
Between the bottom of the timber and the building unit and the adjacent building unit
The lower surface of the well material is flush.

According to the second aspect of the present invention, since a ceiling material composed of a gypsum board and a rock wool sound-absorbing plate is laminated to form a laminate, it is only necessary to attach the laminate at the site, and the construction is completed. Easy.

[0016]

1 to 4 show an embodiment of the present invention. FIG. 1 is a sectional view of a ceiling portion of a junction between a first-floor building unit and an adjacent building unit of a two-story unit building. FIG. 2 is an explanatory view of a ceiling part of a building unit viewed from an oblique direction, FIG. 3 is an explanatory view showing a skeleton of the building unit, and FIG. 4 is an explanatory view showing a state where the building unit is installed. . FIG. 5 shows another embodiment of the present invention.
It is explanatory drawing which shows the cross section of the ceiling part of the junction part of the building unit with the partition wall of a two-story unit building, and an adjacent building unit.

In FIG. 1 to FIG. 4, reference numeral 1 denotes a building unit. As shown in FIG. 3, the frame of the building unit 1 has four pillars 11, 11, 11, 1 and 4 each made of a steel square tube.
Floor beams 12, 12, 12, 12 made of one and four C-shaped steels
And ceiling beams 13, 13, 13, 13 made of four C-shaped steels
Are assembled in a box shape. A steel floor beam 15 is inserted between the facing floor beams 12, 12, and a wooden floor joist 16 is mounted on the floor beam 15, and the floor material 2 is placed on the floor joist 16. Are provided to form a floor. Also, the facing ceiling beams 13, 1
A wooden girder 17 with a thickness of about 15 mm is attached to the lower surface of the ceiling girder 17, and a gypsum board 4 with a thickness of about 12 mm is attached to the upper surface of the girder 17. Is provided with a rock wool 5 having a thickness of 50 mm. 9 is the basis.

The method of attaching the gypsum board to the upper and lower surfaces of the ceiling beam 17 will be described in more detail with reference to FIGS. 1 and 2. More specifically, both ends of the ceiling beam 17 having a height of 89 mm are 19 mm long. Cut out 110mm and remove all 17
1 and the lower surface of the notch 171 is set to a thickness of 4.5 m.
m, a 250 mm high C-shaped steel beam is placed on the lower flange of the ceiling beam 13, the ceiling beam 17 is inserted, and the ceiling beam is screwed into the end face of the ceiling beam using screws screwed from the ceiling beam 13. It is fixed. Therefore, the lower surface of the ceiling beam 17 protrudes about 14 mm below the ceiling beam 13, and the upper surface of the ceiling beam 17 is lower than the ceiling beam 13 by about 180 mm.

A 12 mm reinforced gypsum board 4 is provided on almost the entire upper surface of the ceiling beam 17, and on the lower surface of the ceiling beam 17, except for the peripheral portion from the ceiling beam 13 to 322 mm. A reinforced gypsum board 3 having a thickness of about 15 mm is attached to the center. And this ceiling beam 13
The lower surface of the ceiling beam 17 in the peripheral portion from to 322 mm is provided with a second notch 172 cut out by about 6 mm, and the second notch 172 has a reinforced gypsum board having a thickness of about 12 mm and a rock wool sound absorbing plate having a thickness of 9 mm. Is passed from the lower surface of the ceiling beam 17 of the building unit to the lower side of the ceiling beam 17 of the adjacent building unit after passing under the ceiling beam 13, It is attached to the two notches 172. Therefore, the lower surface of the rock wool sound absorbing plate 32 and the lower surface of the reinforced gypsum board 3 having a thickness of 15 mm are substantially flush with each other.

The surface on which the outer wall is provided includes a ceiling beam 13 and a floor beam 1.
A stud 19 is attached between the stud 2 and an outer wall material, and an inner wall material is attached inside the stud 19 to form a wall. A notch 173 is provided behind the first notch, and a crosspiece 21 is provided in the notch in a direction orthogonal to the ceiling beam 17. This place corresponds to the joint of the gypsum board 4 and the gypsum board 3, and both the gypsum boards 3, 4 can be attached to the crosspiece 21 with nails.

Next, the construction method and operation of the building unit 1 will be described. At the factory, as shown in FIG.
Four pillars 11, 11, 11, 11 and four ceiling beams 1
3, 13, 13, 13 and four floor beams 12, 12, 1
2 and 12 are assembled in a box shape, and a skeleton having floor beams 15 attached between the floor beams 12 and 12 is manufactured. A floor joist 16 is mounted on the floor beam 15, and a floor material 2 is mounted thereon to form a floor. In addition, about 89 mm in length, about 38 mm in width, and about 1440 mm in length, about 110 mm from the edge to
mm notch to provide a first notch 171, further cut out from the end to about 322 mm (about 212 mm from the first notch 171) to provide a second notch 172, and a notch 173 at the tip thereof. The ceiling small beam 17 is manufactured by providing the ceiling small beam 17, and the ceiling small beam 17 is extended to the opposing ceiling beams 13, 13, and the lower surface of the first notch 171 is placed on the lower flange of the ceiling beam 13, and A screw is screwed into the end face of the ceiling beam 17 from the outside of the ceiling beam 13 to attach the ceiling beam 17 to the ceiling beam 13.

When the ceiling beam 17 is attached to the ceiling beam 13 in this manner, the lower surface of the ceiling beam 17 is 17 mm lower than the lower surface of the ceiling beam 13. A gypsum board 3 having a thickness of about 15 mm is placed on the lower surface of the ceiling beam 17 and 322 mm from the ceiling beam 13.
Attach except for the periphery of. A rock wool 5 having a thickness of about 50 mm is laid on the gypsum board 3. Next, the gypsum board 4 having a thickness of about 12 mm is attached to almost the entire surface of the ceiling beam 17. Further, the building unit 1 is completed by attaching an outer wall, an inner wall, and the like.

The building unit 1 completed in this way is transported to a construction site and placed on a foundation 9 provided in advance.
As shown in FIG. 4, a plurality is installed and assembled. Thereafter, finishing between the building units 1 and finishing such as piping are completed to complete the unit building.

At this time, the finishing of the ceiling between the building unit 1 and the adjacent building unit 1 will be described. Next, a 654 mm wide laminated plate 7 in which a rock wool sound absorbing plate having a thickness of about 9 mm and a gypsum board having a thickness of about 12 mm are bonded with an adhesive is passed from the lower surface of the ceiling beam 17 of the building unit 1 to below the ceiling beam 13. And the laminated plate 7 is attached to both ceiling beams 17. Then, the lower surface of the ceiling beam 17 is
Since it protrudes by about 14 mm from the lower surface of the device, it can be mounted without any trouble. The lower surface of the ceiling beam 7 is almost the same height as the lower surface of the gypsum board 3 having a thickness of about 15 mm attached to the ceiling beam at the center. Next, when a ceiling decorative sheet was stuck on the lower surfaces of the gypsum board 3 and the laminated board 7, the ceiling was beautifully finished because the lower surfaces were almost the same. This ceiling structure is JIS-A-130
4 A 60-minute fire resistance test specified in "Fire resistance test method for building structural parts" passed.

Next, the embodiment shown in FIG. 5 will be described. Compared with the embodiment shown in FIG. 5 and the embodiment shown in FIGS. 1 to 4, the partition wall is provided near the boundary between the building unit 1 and the adjacent building unit 1, and therefore, the ceiling near this boundary is provided. Since the mounting structure of the members is different, this point will be described. In the embodiment shown in FIG. 5, the first notch 171a provided in the ceiling beam 17a has a height of about 1 mm.
Although the length is 9 mm and the length is about 110 mm, a spacer 81 having an L-shaped cross section having a height of about 19 mm and a spacer 82 having a height of about 13 mm are provided in a place where the partition wall 85 is attached below. Is provided with a spacer 8 integrated with the above. Then, the lower surface of the spacer having a height of approximately 19 mm is substantially the same height as the lower surface of the ceiling beam 17a, and the lower surface of the spacer having a height of approximately 13 mm is approximately 6 mm higher than the lower surface of the central portion of the ceiling. Then, a gypsum board 31 having a thickness of about 15 mm is attached to a place having a height of about 19 mm, and a partition wall 85 is attached below the gypsum board 31. The building unit completed in this way is transported to a construction site, and the building unit is assembled at the construction site to form a unit building.

At this time, the construction of the ceiling portion will be described in detail. The lower surface of the spacer having a height of about 13 mm and the ceiling beam of the building unit having the same structure as that of the embodiment shown in FIGS. A laminate plate 7a having a width of 396 mm, in which a rock wool sound absorbing plate having a thickness of about 9 mm and a gypsum board having a thickness of about 12 mm are bonded with an adhesive, is provided between the two notches. Then, the lower surface of the laminated plate 7a is flush with the lower surface of the gypsum board having a thickness of about 15 mm attached to the ceiling beam 13a.
The rest is the same as the embodiment shown in FIGS.

[0027]

As can be seen from the above description, claim 1
In the invention of the present invention, the ceiling of the building unit and the building unit
Ceiling material installed between the building and the adjacent building unit
The special combination of
Excellent. In particular, gypsum board attached to the underside of ceiling beams
With a thickness of about 15 mm and attached to the top of the ceiling beam
The thickness of the gypsum board is about 12 mm, and the thickness is about 5
Attach 0mm rock wool and lower the building unit
Between the ceiling material of the building and the ceiling material below the adjacent building unit.
About 12mm thick gypsum board, rock wool
Assuming that the thickness is 9 mm, it is specified in JIS-A-1304.
Can withstand 60 minutes fire test
It becomes a good unit building.

Further , in this combination of ceiling materials, the building
The thickness of the ceiling material attached to the underside of the knit ceiling beam
And between the building unit and the next building unit
Although the thickness of the ceiling material is different, in the present invention,
The bottom surface of the gypsum board and the bottom surface of the gypsum board around the ceiling
Because they are almost at the same height, the ceiling of the building unit
Between the bottom of the timber and the building unit and the adjacent building unit
The lower surface of the well is flush with the ceiling material
Can be beautifully stuck.

According to the second aspect of the present invention, the gypsum board
Gypsum board and ceiling material consisting of
Rock wool sound absorbing board is laminated and made into laminated board
At the site, just attach this laminate
Construction is easy.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of the present invention, and is an explanatory view showing a cross section of a ceiling portion of a joint portion between a building unit on the first floor and a neighboring building unit of a two-story unit building.

FIG. 2 is an explanatory view of a ceiling portion of a building unit viewed from an oblique direction.

FIG. 3 is an explanatory diagram showing a skeleton of a building unit.

FIG. 4 is an explanatory diagram showing a state in which a building unit is installed.

FIG. 5 shows another embodiment of the present invention, and is an explanatory view showing a cross section of a ceiling portion at a junction between a building unit on the first floor of a two-story unit building and an adjacent building unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Building unit 11 Column 12 Floor beam 13 Ceiling beam 17, 17a Ceiling beam 171, 171a All the notch 172 Second notch 2 Floor material 3, 3a Ceiling material attached to the lower surface of ceiling beam (about thickness) 15 gypsum board) 4 Ceiling material attached to the upper surface of the ceiling beam (gypsum board with a thickness of about 12 mm) 5 Rock wool with a thickness of about 50 mm 7, 7a Ceiling material with better fireproof performance and fire resistance than the ceiling material 3 ( A laminated board of a gypsum board of about 12 mm thickness and a rock wool sound-absorbing board of about 9 mm thickness) 8 Spacer 85 Partition wall 9 Foundation

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) E04B 5/52 E04B 1/348 E04B 1/94

Claims (2)

(57) [Claims] 1. A ceiling structure of the unit building assembling a plurality of building unit having four columns and four ceiling beams and the four floor beams are assembled into a box shape skeleton phase
On the other hand, a wooden ceiling beam is placed around the underside of the ceiling beam.
Projected below the lower surface of the surrounding ceiling beam, it is bridged,
A gypsum board is attached to the top of this ceiling beam,
Gypsum board on the underside of the girder, in the center excluding the periphery of the ceiling girder
To the ceiling without gypsum board
The lower surface of the ceiling beam around the beam is made higher than the center,
Gypsum board and rock wool sound-absorbing board
From the bottom of the Ikobashi, passing below the ceiling beam,
Lower than the center of the ceiling
Under the gypsum board in the middle part
Surface and the lower surface of the gypsum board around the ceiling are almost at the same height
Made with gypsum board attached to the underside of the ceiling beam
Between the gypsum board attached to the top of the ceiling beam
The ceiling structure of a unit building characterized by the provision of cook wool . 2. The ceiling structure of a unit building according to claim 1.
And the gypsum board and the rock wool sound-absorbing board are bonded together
It is made into a laminated board, and this laminated board is
From the lower surface of the Ikobashi, passing under the ceiling beam, the next ceiling beam
Installed on both ceiling beams.
And the ceiling structure of the unit building.