JP5232591B2 - Unit building - Google Patents

Description

  The present invention relates to a unit building constructed by assembling a plurality of building units.

  Conventionally, many unit buildings constructed by assembling a plurality of building units have been implemented because of their good workability.

In order to further improve the workability, this unit building is also implemented by providing a roof portion in advance on the building unit constituting the unit building (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 62-115437

  However, in the conventional unit building described above, when the roof part is provided in the building unit in advance, since it is a configuration that only considers measures against rain between the roof parts, in order to prevent hot air filling and condensation in the attic space The space could not be ventilated efficiently.

  Then, an object of this invention is to provide the unit building which can ventilate an attic space efficiently.

  In order to achieve the above object, the unit building of the present invention is a unit building constructed by assembling a plurality of building units, and a roof portion is provided on the upper part of the building unit, Adjacent portions of the roof are provided with ventilation openings that communicate with the attic space of the building unit, and the ventilation openings are provided with a continuous building cover having ventilation openings, and the roof A series of roofs are formed by the section and the continuous building cover.

  In addition, the ventilation port of the continuous building cover includes the building unit adjacent to the continuous building cover via a support member and a spacer in a state where a ventilation path is secured in a portion where the opening for ventilation is provided. It may be formed so as to straddle the surface.

  Moreover, the eaves side ventilation port is provided in the part which forms the eaves part of the said building unit, and the said eaves side ventilation port and the ventilation port of the said continuous building cover are good to communicate via the said attic space.

  Further, the eaves-end side ventilation opening is provided with a notch for installing a gutter at an outer edge portion of the roof portion of the building unit, and a gutter is installed in the notch for installing the gutter. Further, it may be formed by installing a spacer in a state in which a ventilation path is secured between the engaging portion of the outer end portion and the upper end portion of the outer wall portion of the building unit.

  Moreover, the rain gutter over a series may be installed in the notch for the gutter installation provided in the said roof part of the said some building unit.

  Furthermore, it is good that the said roof part is previously attached to the said building unit.

  Further, an insertion portion for installing the rain gutter is formed at an outer edge portion of the roof portion of the building unit where the notch for installing the rain gutter is provided. A stop part may be inserted and installed in the insertion part.

  Further, the roof portion is attached in advance to a plurality of the building units, and the notches for installing the gutter provided on the roof portion are substantially the same as the lengths of the notches for installing the gutter. The rain gutter members having a length of 1 mm may be attached in advance, and the gutter members may be connected by a joint member to form a series of gutters.

  In addition, a support member longer than the ceiling beam is attached to the upper surface of the ceiling beam of the building unit, the roof portion is attached to the support member, and a flange is provided in the projecting portion of the support member. Also good.

  Furthermore, the said collar part is previously provided in the said overhang | projection part of the said supporting member, and the said collar part may consist of the same member as the said roof part.

  A support member having a cross-sectional shape including an L shape to which the roof portion is attached may be provided on the upper surface of the ceiling beam of the building unit.

  In the unit building of the present invention configured as described above, a roof is provided at the top of the building unit, and an opening for ventilation communicating with the attic space of the building unit is provided in an adjacent portion of the roof of the building unit. The ventilation opening is provided with a continuous building cover with ventilation openings in the ventilation opening, and a series of roofs are formed by the roof and the continuous building cover. The mouth can efficiently ventilate the attic space.

  Here, in the portion where the ventilation opening of the continuous building cover is provided with the ventilation opening, the continuous building cover straddles the adjacent building unit via the support member and the spacer. When attached and formed, the ventilation opening of the multi-building cover can be simply configured, so that the workability is good.

  In addition, an eaves side ventilation opening is provided in the part that forms the eaves of the building unit. When the eaves side ventilation opening and the ventilation opening of the multi-building cover are communicated via the attic space, the eaves side ventilation opening is provided. Since the air in the attic space can be supplied and exhausted through the ventilation openings of the multi-building cover, the attic space can be ventilated more efficiently.

  In addition, the eaves side vents are provided with notches for installing gutters at the outer edge of the roof of the building unit, and gutters are installed in the notches for installing gutters. If it is formed by installing it with a spacer in a state where a ventilation path is secured between the locking part of the building unit and the upper end part of the outer wall part of the building unit, the rain gutter will not protrude toward the eaves, In addition to the good appearance, the eaves side ventilation opening can be easily configured, so the workability is good.

  In addition, if rain gutters are installed across a series of gutter installation cutouts provided on the roof of multiple building units, it is possible to install gutters on multiple building units at once. Because it is possible, workability is good.

  Furthermore, when the roof part is attached to the building unit in advance, it is possible to save the trouble of retrofitting, so that the workability is better.

  In addition, an insertion part for installing the rain gutter is formed on the outer edge of the roof of the building unit where the notch for installing the gutter is provided. In the case where the rain gutter is installed by being inserted into the bayonet part, the rain gutter can be easily installed after ensuring a continuous waterproof property with the roof part.

  Furthermore, the roof part is attached to the plurality of building units in advance, and the notch for installing the rain gutter provided on the roof part has a length substantially the same as the length of the notch for installing the gutter. When the rain gutter members are respectively attached in advance and the gutter members are connected by a joint member to form a series of rain gutters, the number of members to be retrofitted is reduced, so that the workability is further improved.

  In addition, when a support member that is longer than the ceiling beam is attached to the upper surface of the ceiling beam of the building unit, a roof portion is attached to the support member, and a flange portion is provided on the protruding portion of the support member, Since it is not necessary to separately provide a support structure for the heel, the collar portion can be easily attached.

  Further, a flange portion is provided in advance on the projecting portion of the support member, and when the flange portion is made of the same member as the roof portion, the workability is further improved, and the roof portion and the flange portion are identical. There is a bodily sensation and the design appearance can be improved.

  In addition, when a support member having a cross-sectional shape including an L-shape to which the roof portion is attached is provided on the upper surface of the ceiling beam of the building unit, the member can be shared and can be implemented economically. Also, workability at the time of extension and renovation is good.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  In the unit building 1 of the present embodiment, as shown in FIG. 1, the building units 2A and 2B are arranged in the digit direction, and the building unit 2C is arranged in the wife direction on the right wife side of these building units 2A and 2B. It is a unit building constructed by assembling these building units 2A, 2B, 2C.

  On the upper part of these building units 2 (2A, 2B, 2C), as shown in FIG. 2, a panel frame 33 comprising a plurality of hanging trees 32,. A roof portion 3 formed by pasting a field board 34 and further overlaying a roof finishing material 35 is attached in advance at a factory or the like.

  Further, as shown in FIG. 3, ventilation openings communicating with the attic space S of the building units 2 </ b> A, 2 </ b> B, 2 </ b> C are formed in adjacent portions of the roof parts 3,... Of the building units 2 </ b> A, 2 </ b> B, 2 </ b> C. 4A, 4B, and 4C are provided in advance (see also FIG. 4).

  Furthermore, as shown in FIG. 1, a long continuous building cover 5 is provided across the openings 4A, 4B, 4C for ventilation.

  Here, as shown in FIG. 4, the ceiling beams 7 of the building units 2A, 2B, and 2C are provided in the portions where the ventilation openings 4A, 4B, and 4C of the adjacent building units 2A, 2B, and 2C are provided. A plurality of short channel steels 8 as support members are provided at regular intervals.

  Further, a long cross section as a support member having a slit-like hole 9a penetrating in the vertical direction in the center on the upper flanges 8a of the plurality of channel steels 8,. A mountain-shaped receiving material 9 is provided.

  And the long continuous building cover 5 is long screw 11, ... via the spacer 10, ... arrange | positioned by equal intervals on the right-and-left inclined surface of the receiving material 9 of a long cross-sectional mountain shape. A ventilation port 6 is formed by being attached.

  Further, on the inner side surfaces of the left and right lower ends of the long continuous building cover 5, water return members 12 are fixed by rivets 13,.

  Further, fixing plates 16 are vertically provided at the ends of the left and right roof finishing materials 35, respectively, and water return sheets 17 are provided on these fixing plates 16, respectively. The upper end portion of 17 is fixed to the left and right inclined surfaces of the receiving member 9, and the lower end portion is fixed to the left and right bottom surfaces of the receiving member 9.

  Moreover, as shown in FIG. 3, the rectangular rain gutter installation notch 14 is each provided in the outer edge part of each roof part 3 in building unit 2A, 2B.

  As shown in FIG. 1, a rain gutter 15 having a vertical gutter 15 </ b> A at one end is installed across the notches 14 and 14 for installing the gutter.

  Here, as shown in FIG. 5, the locking portion 15 b at the inner end portion of the rain gutter 15 is attached via a water stop material 18 provided on the lower surface of the left end portion of the roof finishing material 35.

  Further, the locking portion 15a at the outer end portion of the rain gutter 15 is a grooved steel 22 as a support member provided at a plurality of intervals on the upper end portion of the outer wall portion 19 and the ceiling beam 7 of the building units 2A and 2B. ,... Are attached via spacers 20,... Arranged at equal intervals.

  Thus, the rain gutter 15 is installed and the eaves-end side ventilation port 21 is formed.

  Moreover, the water return sheet | seat 26 and the L-shaped water-stop member 27 are provided in the lower side of the rain gutter 15, and the waterproof performance is improved.

  Further, the draining material 28 is also provided in the downward direction from the upper flange portion 22 a of the channel steel 22.

  Further, a water return material 23 having an L-shaped cross section is provided at the upper end of the outer wall portion 19, and the decorative material 24 is screwed from the upper surface of the locking portion 15 a at the outer end portion of the rain gutter 15. It is attached with.

  In this way, a series of roofs 30 are formed as shown in FIG.

  In the unit building 1 of the present invention configured as described above, a roof portion 3 is provided above the building units 2A, 2B, and 2C, and the roof portions 3,... Of the building units 2A, 2B, and 2C are adjacent to each other. The portions are provided with ventilation openings 4A, 4B, 4C communicating with the attic space S of the building units 2A, 2B, 2C, and the ventilation openings 6 are provided in the ventilation openings 4A, 4B, 4C. Since the continuous building cover 5 is provided and a series of roofs are formed by the roof portions 3,... And the continuous building cover 5, the attic space is efficiently provided by the ventilation port 6 of the continuous building cover 5. S can be ventilated.

  Here, in the portion where the ventilation openings 6 of the continuous building cover 5 are provided with ventilation openings 4A, 4B and 4C, the continuous building cover 5 is a grooved steel as a support member in a state where a ventilation path is secured. 8, etc., and is formed across the building units 2A, 2B, 2C via the receiving material 9 and the spacers 10,... It can be done and has good workability.

  In addition, an eaves side ventilation port 21 is provided at a part forming the eaves of the building units 2A and 2B, and the eaves side ventilation port 21 and the ventilation port 6 of the multi-building cover 5 communicate with each other via the attic space S. Therefore, the air in the attic space S can be supplied and exhausted by the eaves-end side ventilation port 21 and the ventilation port 6 of the continuous building cover 5, so that the attic space S can be more efficiently ventilated.

  Here, when the opening area of the vent hole 21 on the eaves side is relatively larger than the vent hole 6 of the multi-building cover 5, the temperature in the attic space S is usually higher than the outside air. The vent hole 21 on the eaves side serves as a vent hole on the intake side, and the vent hole 6 on the multi-building cover 5 serves as a vent hole on the exhaust side, so that the attic space S can be more efficiently ventilated.

  1, 4, and 5, an arrow represented by a dotted line W indicates the air flow at that time.

  In addition, the eaves side ventilation opening 21 is provided with notches 14 and 14 for installing rain gutters on the outer edge portions of the roof parts 3 and 3 of the building units 2A and 2B. A gutter 15 is installed, and the gutter 15 has a spacer 20 in a state in which a ventilation path is secured between the locking portion 15a at the outer end portion and the upper end portion of the outer wall portion 19 of the building unit 2A, 2B. Since the rain gutter 15 does not protrude from the eaves, the design appearance is good and the eaves side ventilation port 21 can be simply configured, and the workability is good.

  In addition, since the rain gutter 15 straddling a series of gutters 15 is installed in the rain gutter installation notches 14 and 14 provided on the roof portions 3 and 3 of the building units 2A and 2B, the gutter 15 is attached to the two building units 2A. , 2B can be installed at once, and workability is good.

  Moreover, the number of downpipe can be reduced as compared with the case where gutters are individually provided in the building units 2A and 2B.

  Furthermore, since the roof part 3 is previously attached to each building unit 2A, 2B, 2C at the factory etc., the effort of retrofitting can be saved and workability is more favorable.

  Hereinafter, Example 1 of the above-described embodiment will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In the first embodiment, as shown in FIG. 6, each of the building units 2A, 2B, and 2C is provided in the portion where the ventilation openings 4A, 4B, and 4C of the adjacent building units 2A, 2B, and 2C are provided. On the ceiling beam 7, a long channel steel 80 is provided as a support member having a plurality of vent holes 80c, ... in the web portion 80b.

  Further, on the upper flange portion 80a of the grooved steel 80, a long cross-sectional mountain-shaped receiving material 9 is provided as a support member having a slit-like hole 9a penetrating in the vertical direction in the center portion. Yes.

  And the long continuous building cover 5 is long screw 11, ... via the spacer 10, ... arrange | positioned by equal intervals on the right-and-left inclined surface of the receiving material 9 of a long cross-sectional mountain shape. A ventilation port 6 is formed by being attached.

  That is, the supporting member that supports the long cross-sectional mountain-shaped receiving material 9 is a long channel steel 80 having a plurality of air holes 80c,... It differs mainly from the said embodiment shown in FIG. 4 that the edge part of the base plate 34 and the roof finishing material 35 is provided to the position of the web part 80b of the channel steel 80. FIG.

  Other configurations and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, Example 2 of the above-described embodiment will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In the second embodiment, as shown in FIG. 7, the rain gutter 15 has a locking portion 15 b at its inner end via a water stop 18 provided on the lower surface of the left end of the roof finishing material 35. It is installed by being inserted into a concave portion of a long insertion member 42 as an attached insertion portion for installing a gutter.

  Here, a water stop material 42 a is provided in the recess of the insertion member 42, and the locking portion 15 b of the rain gutter 15 is sandwiched to ensure waterproofness.

  That is, the insertion member 42 provided with the water stop material 42a for rain gutter installation is provided in the outer edge part in which the notch 14 for rain gutter installation of the roof part 3 of the building unit 2A was provided. 15, since the locking portion 15 b of the inner end is inserted and installed in the recess of the insertion member 42, the rain gutter 15 is secured with continuous waterproofing between the roof portion 3 and the rain gutter 15. The main difference from the embodiment shown in FIG. 5 is that it can be easily installed.

  Other configurations and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, Example 3 of the above-described embodiment will be described with reference to FIGS. 8 and 9. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In this Example 3, as shown in FIG. 8, in the rectangular rain gutter installation notch provided respectively on the outer edge part of each roof part 3 attached in advance in a factory or the like in the building units 2A, 2B, Gutter members 150a having substantially the same length as these notches are also attached in advance at a factory or the like.

  And between these rain gutter members 150a, 150a, as shown in FIGS. 9A to 9C, the joint member 150b is retrofitted by bolts 36,... And nuts 37,. A series of rain gutters 150 are secured to ensure water tightness.

  A vertical rod 150A is provided on the outer end side of the joint member 150b.

  Further, the gap between the roof parts 3 and 3 of the building units 2A and 2B is closed by a roof material 3a made of the same material as the roof part 3 to ensure water tightness.

  That is, the roof units 3 are attached to the building units 2A and 2B in advance, and the lengths of the gutter installation notches provided in the roof units 3 are approximately the same as the lengths of the gutter installation cut-outs. A gutter member 150a having the same length is also attached in advance, and the gutter members 150a and 150a are connected by a joint member 150b to form a series of gutters 150.

  For this reason, since only the joint member 150b and the vertical shaft 150A are retrofitted, it is mainly different from the embodiment shown in FIG.

  Other configurations and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, Example 4 of the above-described embodiment will be described with reference to FIGS. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.

  In the fourth embodiment, as shown in FIG. 10, a collar portion 38 is provided on the right digit side of the building unit 2C.

  As with the roof portion 3, the ridge portion 38 has a roof finishing material 35 overlapped on the base plate 34 (see FIG. 14), and as shown in FIG. A steel receiving member 39 as a support member longer than the ceiling beam 7 is attached to the upper surface of the ceiling beam 7, the roof portion 3 is attached to the steel receiving member 39, and the overhanging portion 39 a of the steel receiving member 39 is attached. , Provided in advance.

  Here, as for the steel receiving material 39, the part which attaches the roof part 3 is an L-shaped cross section, The fixing pieces 41 and 41 are formed in the both ends, The bolts 40 and. By attaching to the upper surface of the ceiling beam 7.

  Further, at one end portion of the steel receiving member 39, grooved steel is joined by welding or the like to form an overhang portion 39a.

  Of course, the collar portion 38 may be provided later.

  Furthermore, as shown in FIG. 12, between the adjacent building units 2A and 2B, a cross section including an L shape along the shape of the step at the end of the hanging tree 32 on the upper surface of the flange portion of the ceiling beam 7 A frame member 31A having an L-shaped cross section as a supporting member having a shape is provided by bolts and nuts.

  Further, as shown in FIG. 13, the locking portion 15 a at the outer end portion of the rain gutter 15 includes an L shape provided on the upper end portion of the outer wall portion 19 of the building units 2 </ b> A and 2 </ b> B and the ceiling beam 7. A plurality of spacers 20 arranged at equal intervals between the upper flange portion 43a of the groove-shaped member 43 obtained by joining the L-shaped steel 43B and the L-shaped steel 43A as support members having a cross-sectional shape by welding or the like at the web portion; It is attached via ...

  Here, the same L-shaped cross-section member as the frame member 31A is used for the L-shaped steel 43B.

  Further, in the portion of the building unit 2 </ b> C provided with the flange portion 38 on the right girder side, a cross-sectional shape including an L shape along the shape of the step at the end of the hanging tree 32 on the upper surface of the flange portion of the ceiling beam 7. A frame member 31A having an L-shaped cross section as a supporting member is provided with bolts and nuts.

  And the W-shaped as a support member of a cross-sectional shape including an L-shape that supports the hanging tree 44 and the eaves ceiling plate 46 with bolts and nuts at the rising portion outside the frame member 31A of the L-shaped cross section. A steel receiving member 45 having a cross section is joined.

  In the fourth embodiment, the frame member 31A has an L-shaped cross section having substantially the same width as the portion in contact with the flange of the ceiling beam 7. However, the present invention is not limited to this. It may be carried out with a W-shaped cross section extended up to.

  That is, a steel receiving member 39 as a support member longer than the ceiling beam 7 is attached to the upper surface of the ceiling beam 7 of the building unit 2C, the roof portion 3 is attached to the steel receiving member 39, and the steel receiving member 39 is attached. Since the overhang portion 39a is provided with the flange portion 38a, it is not necessary to separately provide a support structure for the flange portion 38, and thus the flange portion 38 can be easily attached.

  In addition, the overhanging portion 39a of the steel receiving member 39 is provided with a collar portion 38 in advance, and the collar portion 38 is made of the same member as the roof portion 3, so that the workability is further improved and the roof portion 3 and the collar part 38 have a sense of unity, and the design appearance can be improved.

  Furthermore, the steel receiving member 39 may be determined by the presence or absence of the overhanging portion 39a depending on the presence or absence of the flange portion 38, so that the members can be easily shared and can be economically implemented.

  Further, a frame member 31A having an L-shaped cross section is provided on the upper surface of the ceiling beam 7 of the building units 2A, 2B, 2C as a support member having a cross-sectional shape including the L shape to which the roof portion 3 is attached. Since the member having the same L-shaped cross section as the frame member 31A is also used for 43B, the member can be shared here and can be implemented economically.

  In addition, since it is a common structure in which the frame member 31A to which the roof portion 3 is attached is provided on the upper surface of the ceiling beam 7, workability at the time of extension and renovation is also good.

  These are mainly different from the embodiment shown in FIG.

  Other configurations and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  The best embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment and Examples 1 to 4 and does not depart from the gist of the present invention. A degree of design change is included in the present invention.

  For example, in the embodiment and Examples 1 to 4, the unit building 1 is constructed by assembling three building units 2A, 2B, and 2C. However, the present invention is not limited to this, and more building units 2 are used. May be.

  Moreover, in the said embodiment and Examples 1-4, in order to explain attic ventilation easily, the one-story unit building 1 was applied, However, It can implement similarly in the unit building of 2nd floor or more. .

It is a top view which shows schematic structure of the unit building of the best embodiment of this invention. It is explanatory drawing which shows schematic structure of the building unit which comprises the unit building of FIG. In FIG. 1, it is a top view which shows schematic structure of the state which does not provide the continuous building cover and the gutter. It is AA arrow sectional drawing of FIG. It is a BB arrow directional cross-sectional view of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a cross-sectional view taken along line BB in FIG. It is a top view which shows schematic structure of the unit building of Example 3. FIG. (A) is explanatory drawing which shows the state before attaching a joint member and a roofing material in (b), (b) is an enlarged view in the C section of FIG. 8, (c) is D- of (b). It is D line arrow sectional drawing. It is a top view which shows schematic structure of the unit building of Example 4. FIG. It is a perspective view which shows schematic structure of the attachment structure of the collar part in Example 4. FIG. It is the EE arrow directional cross-sectional view of FIG. It is a FF arrow directional cross-sectional view of FIG. It is a GG arrow directional cross-sectional view of FIG.

Explanation of symbols

1 Unit Building 2, 2A-2C Building Unit 3 Roof S S Attic Space 4A-4C Opening for Ventilation 5 Continuous Building Cover 6 Ventilation Port 7 Ceiling Beam 30 Roof 8, 80 Channel Steel (Support Member)
9 Receiving material (supporting member)
DESCRIPTION OF SYMBOLS 10 Spacer 14 Notch 15 for rain gutter installation Rain gutter 15a, 15b Locking part 19 Outer wall part 20 Spacer 21 Eaves side vent 150 Rain gutter 150a Gutter member 150b Joint member 38 Gutter part 39 Steel receiving material (support member )
39a Overhanging portion 42 of steel receiving material (supporting member) Inserting member (inserting portion)
31A Frame material (support member having a cross-sectional shape including an L-shape)
43B L-shaped steel (supporting member with cross-sectional shape including L-shape)
45 Steel receiving member (supporting member with cross-sectional shape including L-shape)

Claims (10)

A unit building constructed by assembling multiple building units,
A roof portion is provided on the top of the building unit, and an opening for ventilation communicating with the attic space of the building unit is provided in an adjacent portion of the roof portion of the building unit, and the ventilation unit In the opening portion of the building, a continuous building cover having a ventilation opening is provided, and a series of roofs are formed by the roof portion and the continuous building cover ,
The ventilation port of the multi-building cover covers the building unit adjacent to the adjacent building unit via a support member and a spacer in a state where a ventilation path is secured in a portion where the opening for ventilation is provided. A unit building characterized by being attached and formed . An eaves side ventilation port is provided in a part forming the eaves of the building unit, and the eaves side ventilation port and the ventilation port of the multi-building cover communicate with each other via the attic space. The unit building according to claim 1 . The eaves-end side ventilation opening is provided with a notch for installing a gutter at an outer edge portion of the roof portion of the building unit, and a gutter is installed in the notch for installing the gutter. according to claim 2, characterized in that it is formed by placing via a spacer while ensuring the ventilation channel between the locking portion of the outer end and the outer wall of the upper portion of the building units Unit building. The unit building according to claim 3 , wherein a rain gutter is placed across a series of gutter installation cutouts provided on the roof portion of the plurality of building units. The unit building according to any one of claims 1 to 4 , wherein the roof portion is attached in advance to the building unit. An insertion portion for rain gutter installation is formed on an outer edge portion of the roof portion of the building unit where the notch for rain gutter installation is provided, and the rain gutter is a locking portion at an end thereof. The unit building according to claim 3 , wherein the unit building is installed by being inserted into the insertion portion. The roof portion is attached in advance to a plurality of the building units, and the notch for installing the gutter provided on the roof portion has a length substantially the same as the length of the notch for installing the gutter. 4. The unit building according to claim 3 , wherein each of the gutter members is attached in advance, and the gutter members are connected by a joint member to form a series of gutters. A support member that is longer than the ceiling beam is attached to the upper surface of the ceiling beam of the building unit, the roof portion is attached to the support member, and a flange is provided at the overhanging portion of the support member. unit building according to any one of claims 1 to 7, characterized. The unit building according to claim 8 , wherein the ridge portion is provided in advance in the projecting portion of the support member, and the ridge portion is formed of the same member as the roof portion. The unit building according to any one of claims 1 to 9 , wherein a support member having a cross-sectional shape including an L shape to which the roof portion is attached is provided on an upper surface of a ceiling beam of the building unit. .

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