JP5042615B2 - Building unit and unit building using the same - Google Patents

Description

  The present invention relates to a building unit having a shorter side dimension than a normal unit and a unit building using the same.

  In Patent Document 1 below, after joining one end of a joining member to a short side beam of an expansion unit such as a half size with bolts and nuts, the other end of the joining member is welded to the side face of the end of a column. Unit buildings to be joined are disclosed.

According to the above configuration, the short-side beam is made into a flexible joint member before being put into the factory production line, and this is put into the factory production line and rigidly joined to the end side surface of the column. A balanced expansion unit can be obtained.
JP-A-9-256473

  However, according to the prior art disclosed in Patent Document 1, there is room for improvement in terms of welding accuracy.

  That is, as described above, in the case of the prior art, a pretreatment process is required in which the short side beam and the joining member are softly joined in advance before the expansion unit is put into the production line. Since the outer diameter is set to be slightly larger than the outer diameter, a slight assembling error may occur when the joining member and the short side beam are joined by bolts. In this state, since the joining member is welded to the side surface of the end portion of the column, it is conceivable that the welding accuracy is lowered, such as welding distortion. In addition, when welding accuracy falls, the rigidity reduction amount of the part which carried out the soft joining may vary.

  In consideration of the above facts, the present invention improves the rigid joint accuracy between the short-side beam and the column, and a building unit capable of ensuring a good rigidity balance when used in combination with a normal unit, and the building unit The purpose is to obtain the unit building used.

The invention of claim 1 is a building unit in which the dimensions in the long side direction and the height direction are set to be substantially the same as those of a normal size building unit, and the dimension in the short side direction is set shorter than that of the normal size building unit. The column located in the height direction in the beam located in the short side direction after the column located in the height direction and the beam located in the short side direction are rigidly joined, or the vicinity thereof the soft joint is provided at least one position, further, the flexible joint, said beam located in the short side direction along a junction near said columns, and was left in the column side beams A joining member is arranged in a state straddling a part and the end of the cut beam, and both are rejoined, and the joining member and a part of the beam left on the column side are joined and the joining member. And at least one of the joints of the cut beam ends It is set by the belt joint, and wherein the.

The invention of claim 2 is a building unit in which the dimension in the long side direction and the height direction is set to be substantially the same as that of the normal size building unit, and the dimension in the short side direction is set shorter than that of the normal size building unit. In addition, the column located in the height direction and the beam located in the short side direction are rigidly joined, and the beam located in the short side direction is rigidly joined to the column located in the height direction. The joint member is arranged in a state where it is cut in the vicinity of the beam and straddling the part of the beam left on the column side and the end of the cut beam, and the both are rejoined and the joint member and the column side At least one flexible joint is set by bolting at least one of the joining of a part of the remaining beam and the joining of the joining member and the end of the cut beam. It is characterized by.

The invention of claim 3 is a building unit in which the dimensions in the long side direction and the height direction are set to be substantially the same as those of the normal size building unit, and the dimension in the short side direction is set shorter than that of the normal size building unit. After the column located in the height direction and the beam located in the short side direction are rigidly joined, the junction part of the column located in the height direction and the beam located in the short side direction or the vicinity thereof the soft joint is provided at least one position, further, the flexible joint, the column located above the height direction along a junction near said beam, and left on the beam side pillars of The joining member is arranged in a state straddling a part and the end of the cut pillar, and both are rejoined, and the joining member and the part of the pillar left on the beam side are joined and the joining member. And at least one of the joining of the end of the cut pillar It is set by the belt joint, and wherein the.

The invention of claim 4 is a building unit in which the dimensions in the long side direction and the height direction are set to be substantially the same as those of a normal size building unit, and the dimension in the short side direction is set shorter than that of the normal size building unit. The column located in the height direction and the beam located in the short side direction are rigidly joined, and the column located in the height direction is rigidly joined to the beam located in the short side direction. The joint member is arranged in a state where it is cut in the vicinity of the beam and straddling the part of the pillar left on the beam side and the end of the cut pillar, and the both are rejoined and the joint member and the beam side are disposed. At least one flexible joint is set by bolting at least one of the joining with a part of the remaining pillar and the joining between the joining member and the end of the cut pillar. It is characterized by.

The unit building according to the invention of claim 5 includes a first building unit having a normal size and a second building unit according to any one of claims 1 to 4. It is characterized by that.

  According to the first aspect of the present invention, the column positioned in the height direction in the beam positioned in the short side direction after the column positioned in the height direction and the beam positioned in the short side direction are rigidly joined. Since at least one flexible joint portion is provided at or near the joint portion, the flexible joint portion is not provided on the beam during rigid joining. Therefore, the perpendicularity of the joint surface between the column and the beam at the time of rigid joining can be accurately obtained, and welding distortion and the like can be suppressed as much as possible. For this reason, the joining precision of the site | part rigidly joined can be made high. In addition, by providing a flexible joint to the beam after the rigid joint, the amount of decrease in the rigidity of the flexible joint can be made as designed.

Furthermore, according to the present invention , the beam located in the short side direction is cut in the vicinity of the joint portion with the column, and in a state straddling a part of the beam left on the column side and the end of the cut beam. At least one of joining the joining member and a part of the beam left on the column side and joining the joining member and the end of the cut beam is performed. Since it was decided to set the flexible joint by bolting, as processing, cutting of the beam and bolting of the joining member (exactly, the joining member and a part of the beam left on the column side) If both the joint and the joint between the joint member and the end of the cut beam are bolt joints, bolt joint is used, and if only one of them is bolt joint, bolt joint and a soft joint according to this )It turns out that. The cutting of the beam itself is easier than accurately providing the weakened portion in the beam, and the bolt connection between the joining member and the part of the beam left at the end of the cut beam or on the column side can be performed without difficulty. Even if bolted joints and welded joints are used together to join the joint member and both, the beam is not welded to the column but welded to a part of the beam left on the column side or cut. Since the welded surface is not orthogonal to each other, the welding accuracy is easy to ensure and the welding work is easy.

  In addition, the rigidity of the flexible joint can be easily changed by changing the member width of the joining member or changing the diameter of the bolt.

According to the second aspect of the present invention, the column positioned in the height direction and the beam positioned in the short side direction are rigidly joined, and the beam positioned in the short side direction is positioned in the height direction. The joint member is placed in a state where it is cut in the vicinity of the rigid joint with the column to be cut and straddles the part of the beam left on the pillar side and the end of the cut beam, and the two are re-joined together. At least one flexible joint is formed by bolting at least one of the joining between the joining member and a part of the beam left on the column side and the joining between the joining member and the end of the cut beam. Since it is set, it becomes possible to cut the beam after rigid joining and join the cut portion with a joining member by welding and bolt joining. Therefore, the perpendicularity of the joint surface between the column and the beam at the time of rigid joining can be accurately obtained, and welding distortion and the like can be suppressed as much as possible. For this reason, the joining precision of the site | part rigidly joined can be made high. In addition, by providing a flexible joint to the beam after the rigid joint, the amount of decrease in the rigidity of the flexible joint can be made as designed.

According to this invention of Claim 3 , after the column located in a height direction and the beam located in a short side direction are rigidly joined, the beam located in the said short side direction in the column located in the said height direction Since at least one flexible joint portion is provided at or near the joint portion, the flexible joint portion is not provided on the column at the time of rigid joining. Therefore, the perpendicularity of the joint surface between the column and the beam at the time of rigid joining can be accurately obtained, and welding distortion and the like can be suppressed as much as possible. For this reason, the joining precision of the site | part rigidly joined can be made high. In addition, by providing the flexible joint portion on the column after the rigid joint, the amount of decrease in the rigidity of the flexible joint portion can be made as designed.

Further, according to the present invention , the column located in the height direction is cut in the vicinity of the joint portion with the beam, and in a state straddling a part of the column left on the beam side and the end of the cut column. At least one of joining of the joining member and a part of the column left on the beam side and joining of the joining member and the end of the cut pillar is performed by arranging the joining member and rejoining both. Since it was decided to set the flexible joint by bolting, as processing, column cutting and bolting of the joining member (to be exact, the joining member and a part of the pillar left on the beam side) When both the joining and joining of the joined member and the end of the cut column are bolted, bolted joining, and when only one of them is bolted, bolted joining and a flexible joint equivalent thereto )It turns out that. The cutting of the column itself is easier than accurately providing the weakened portion in the column, and the bolt connection between the joining member and the end of the cut column or a part of the column left on the beam side can be easily performed. Even if bolt joint and weld joint are used together to join the joint member and both, the pillar is not welded to the beam but welded to a part of the pillar left on the beam side or cut. Since the welded surface is not orthogonal to each other, the welding accuracy is easy to ensure and the welding work is easy.

  In addition, the rigidity of the flexible joint can be easily changed by changing the member width of the joining member or changing the diameter of the bolt.

According to the fourth aspect of the present invention, the column positioned in the height direction and the beam positioned in the short side direction are rigidly joined, and the column positioned in the height direction is positioned in the short side direction. The joint member is arranged in a state where it is cut in the vicinity of the rigid joint with the beam to be welded, and straddles the part of the pillar left on the beam side and the end of the cut pillar, and the two are rejoined together. By connecting at least one of the joining of the joining member and a part of the pillar left on the beam side and the joining of the joining member and the end of the cut pillar to each other by bolt joining, at least one flexible joint is provided. Since it is set, it becomes possible to cut the column after rigid joining and join the cut portion with a joining member by welding and bolt joining. Therefore, the perpendicularity of the joint surface between the column and the beam at the time of rigid joining can be accurately obtained, and welding distortion and the like can be suppressed as much as possible. For this reason, the joining precision of the site | part rigidly joined can be made high. In addition, by providing a flexible joint to the beam after the rigid joint, the amount of decrease in the rigidity of the flexible joint can be made as designed.

According to this invention of Claim 5 , a unit building is comprised including the 1st building unit of a normal size, and the 2nd building unit as described in any one of Claim 1 thru | or 4. Therefore, the rigidity of the excessively rigid portion is moderately moderated.

  As described above, the building unit according to claim 1 has an excellent effect of ensuring a good rigidity balance when used in combination with a normal unit.

Furthermore, the building unit according to the first aspect of the present invention has an excellent effect that the flexible joint portion can be set by an easy operation and the rigidity reduction amount of the flexible joint portion can be easily adjusted. Have.

The building unit according to claim 2 has an excellent effect of ensuring a good rigidity balance when used in combination with a normal unit. Moreover, since it will be cutting of a beam, bolt joining of a joining member, etc. as a process, a soft junction part can be set with an easy operation | work. Furthermore, since the size of the joining member, the diameter of the bolt, and the like can be easily changed, the effect that the rigidity reduction amount of the flexible portion can be easily adjusted is also obtained.

The building unit according to claim 3 has an excellent effect of ensuring a good rigidity balance when used in combination with a normal unit.

Furthermore, the building unit according to the third aspect of the present invention has an excellent effect that the flexible joint portion can be set by an easy work and the rigidity reduction amount of the flexible joint portion can be easily adjusted. Have.

The building unit according to claim 4 has an excellent effect of ensuring a good rigidity balance when used in combination with a normal unit. Moreover, since it will be cutting of a beam, bolt joining of a joining member, etc. as a process, a soft junction part can be set with an easy operation | work. Furthermore, since the size of the joining member, the diameter of the bolt, and the like can be easily changed, the effect that the rigidity reduction amount of the flexible portion can be easily adjusted is also obtained.

[First Embodiment]
A building unit according to the present invention and a first embodiment of a unit building using the same will be described below with reference to FIGS.

  FIG. 4 shows a schematic perspective view of a unit house according to the present embodiment. As shown in this figure, a unit house 10 as a unit building includes a foundation 12, a first floor portion 14 provided on the foundation 12, a second floor portion 16 provided on the first floor portion 14, and an illustration. It is composed of a roof part and not. Further, the first floor portion 14 and the second floor portion 16 are a plurality of normal size box-shaped normal units 18 and a small size (half size in this embodiment) box disposed adjacent to the normal units 18. And a plurality of expansion units 20 of the shape. The “extension unit 20” as the second building unit here is the same as the normal unit 18 as the first building unit of the normal size in the long side direction and the height direction, and is short. This refers to a building unit in which the dimension in the side direction is set shorter than the normal unit 18 of the normal size.

  FIG. 3 is a perspective view of a portion where the normal unit 18 and the expansion unit 20 are disposed adjacent to each other. As shown in this figure, the normal unit 18 includes a pillar 22 erected at four corners, two types of long and short ceiling beams 24 and 26 that connect the upper ends of the opposing pillars 22, and the lower end of the opposing pillars 22. It comprises two types of long and short floor beams 28 and 30 that connect the parts. Further, a small ceiling beam 32 is arranged at a predetermined interval between the pair of large ceiling beams 24 on the long side. Similarly, a floor beam 34 is disposed at a predetermined interval between the pair of large floor beams 28 on the long side.

  Similarly, the expansion unit 20 includes a pillar 36 erected at four corners, ceiling beams 38 and 40 that connect the upper ends of the opposite pillars 36, and floor beams 42 and 44 that connect the lower ends of the opposite pillars 36. And. Further, a plurality of ceiling beams 46 are disposed at a predetermined interval between the pair of long side beams 38 on the long side. Similarly, a plurality of floor beams 48 are arranged at a predetermined interval between the pair of large floor beams 42 on the long side.

  The above-described features of the present embodiment lie in the joint portion between the large floor beam 44 and the column 36 located in the short side direction of the extension unit 20 and will be described in detail below.

  As shown in FIGS. 1 and 2, the floor girder 44 is made of channel steel, and its longitudinal end 44 </ b> A is welded to the side surface of the lower end of the column 36 with a sufficient welding length. . Note that the welded joint portion between the longitudinal end 44 </ b> A of the floor beam 44 and the lower end of the column 36 is a rigid joint 50.

  Further, the floor girder 44 is cut in the vicinity of the joining portion after the rigid joining to the column 36. Hereinafter, the cut portion is referred to as “cut portion 52”. As a result, the part of the floor girder 54 left on the column 36 side and the end part 56 of the cut floor girder are arranged facing each other in the longitudinal direction of the beam with a slight gap 58 across the cutting part 52. Has been. Then, the joining plate 60 as a rectangular flat plate joining member is in contact with the web surface of the part 54 of the floor beam remaining on the column 36 side and the web surface of the end portion 56 of the cut floor beam. They are arranged and joined together. Specifically, one end portion 60 </ b> A of the joining plate 60 is welded to the web surface of a part 54 of the floor beam remaining on the column 36 side. The other end portion 60B of the joining plate 60 is bolted to the end portion 56 of the cut floor girder. Specifically, a long hole 62 is formed in advance in two stages on the other end side of the joining plate 60, and correspondingly, a long hole 62 is formed in the web of the end portion 56 of the cut floor beam. Bolt insertion holes are respectively formed at two upper and lower positions overlapping with each other. Then, the bolt 64 is inserted into the long hole 62 and the bolt insertion hole, and the nut 66 (see FIG. 2A) is screwed, whereby the other end 60B of the joining plate 60 and the end of the floor beam that has been cut. The part 56 is fastened and fixed. A joint portion using the joint plate 60 is a soft joint portion 68.

  In other words, the “rigid joint” in the present invention is relatively rigid by being welded or the like having a sufficient weld length, such as the joint between the longitudinal end 44A of the floor beam 44 and the column 42. In contrast, the “soft joint portion” in the present invention is a joint portion in which the rigidity of the joint portion is intentionally relatively low, such as a joint portion using the joint plate 60. Say. Therefore, as in the present embodiment, the one end portion 60A of the joining plate 60 is welded to a part 54 of the floor girder, but the welding length is shorter than that of the rigid joining portion 50, and so much welding strength cannot be obtained. Further, since the other end portion 60 </ b> B of the joining plate 60 is bolted to the end portion 56 of the floor girder, the joining strength is lower than that of the rigid joining portion 50. Therefore, in this embodiment, the soft junction part 68 is comprised in the whole site | part to which the joining plate 60 was joined.

(Action / Effect)
Next, the operation and effect of this embodiment will be described.

  A procedure for assembling the expansion unit 20 of the present embodiment on the production line of the factory will be described. In the factory production line, the box-shaped expansion unit 20 is assembled in the same procedure as the normal unit 18. That is, first, the end 44A in the longitudinal direction of the large floor beam 44 located on the short side of the expansion unit 20 is welded to the side surface of the lower end (joint portion) of the column 36 to be rigidly joined. Therefore, at this time, the floor girder 44 is not cut. Next, after the end 44 </ b> A in the longitudinal direction of the floor girder 44 is rigidly joined to the side surface of the lower end portion of the column 36, the floor girder 44 is cut at a portion near the end 44 </ b> A in the longitudinal direction of the floor girder 44. After cutting, the web surface of the part 54 of the floor girder remaining on the column 36 side and the one end 60A of the joining plate 60 are welded, and then the other end 60B of the joining plate 60 and the end of the cut floor girder. The web of the part 56 is bolted. When the bolts are joined, the elongated holes 62 formed in the other end portion 60B of the joining plate 60 and the bolt insertion holes formed in the end portion 56 of the cut floor beam are overlapped, and the bolt 64 is inserted into both. The nut 66 is screwed onto the penetrating end, thereby joining. As a result, the rigid joint 50 is set at the joint between the large floor beam 44 located on the short side of the expansion unit 20 and the lower end of the column 36, and the soft joint 68 is formed in the vicinity thereof. In addition, the operation | work which sets the above flexible junction part 68 is performed in the middle of a series of production lines which produce the expansion unit 20 in a factory. In other words, in the present embodiment, it is possible to perform the work of setting the flexible joint portion 68 without taking any special trouble of adding an independent process to the production line that is operating during production.

  The unit housing 10 is constructed by transporting the necessary number of the expansion units 20 and the normal units 18 assembled as described above from the factory to the site by transport vehicles.

  In the state in which the unit house 10 of the present embodiment is constructed, the rigidity balance at the location where the expansion unit 20 and the normal unit 18 are disposed adjacent to each other is as shown in FIG. That is, since the flexible joint 68 is set in the vicinity of the joint portion between the floor beam 44 and the column 36, the rigidity of the joint portion between the floor beam 44 and the column 36 is reduced (in FIG. The part is indicated by a black triangle symbol, and the low rigidity part is indicated by a white triangle symbol). Therefore, a good overall rigidity balance is ensured.

  On the other hand, when the flexible joint portion 68 is not set, as shown in FIG. 5A, the rigidity of the joint portion between the floor beam 70 and the column 36 remains high, and the expansion unit 72 Stiffness becomes too high. Accordingly, since the rigidity of the portion where the expansion unit 72 and the normal unit 18 are arranged adjacent to each other becomes too high, the overall rigidity balance is also unbalanced compared to this embodiment.

  As described above, in the extension unit 20 according to the present embodiment and the unit house 10 using the extension unit 20, it is possible to relax the rigidity of the portion where the rigidity is excessively high and to secure a good rigidity balance. Moreover, durability against earthquakes (seismic resistance) can be improved by ensuring a good rigidity balance for the unit housing 10 as a whole. This point will be described in more detail after the description of the second embodiment.

  In particular, in the present embodiment, after the end 44A in the longitudinal direction of the floor beam 44 located on the short side in the expansion unit 20 is first welded to the side surface of the lower end of the column 36, the rigid joint 50 is provided. Since the floor girder 44 is cut in the vicinity of the rigid joint portion 50 and the flexible joint portion 68 is provided, the perpendicularity of the joining surface between the column 36 and the floor girder 44 at the time of rigid joining can be accurately obtained. It is possible to suppress welding distortion and the like as much as possible. Therefore, the joining accuracy of the rigid joint 50 can be increased. In addition, by providing the flexible joint 68 on the floor beam 44, the amount of reduction in the rigidity of the flexible joint 68 can be made as designed. As a result, according to this embodiment, a very good rigidity balance can be obtained.

  Further, in the case of the present embodiment, the processing when setting the flexible joint portion 68 is cutting of the floor beam 44, welding of the joining plate 60, and bolt joining. The cutting of the floor beam 44 is easy. Even when the joining plate 60 is welded, the welding is not performed with the column 36 but with the part 54 of the floor beam remaining on the column 36 side. Are not orthogonal to each other, it is easy to ensure the welding accuracy and the welding work. Furthermore, the bolt connection between the joining plate 60 and the end portion 56 of the cut floor girder can be easily performed. Accordingly, the flexible joint 68 can be set with an easy operation.

  Furthermore, the rigidity of the flexible joint portion 68 can be easily changed by changing the member width or plate thickness of the joining plate 60, changing the diameter of the bolt 64, or the like. Therefore, it is possible to easily adjust the rigidity reduction amount of the flexible joint portion 68.

  In addition, in this embodiment, a pair of upper and lower long holes 62 is formed in the other end portion 60B of the joining plate 60, and bolts 64 are inserted into the bolt insertion holes formed in the end portions 56 of the floor beams that are cut off from the long holes 62. , And the other end portion 60B of the joining plate 60 and the end portion 56 of the cut floor beam are joined together, and when an external force is applied during an earthquake, Relative movement along the long hole 62 is possible between the column 36 and the floor beam 44. Therefore, the generation of bending stress in the floor beam 44 can be suppressed, and the durability of the expansion unit 20 can be improved.

  In the first embodiment described above, one end 60A of the joining plate 60 is welded to the part of the floor beam left on the column 36 side, and the other end 60B of the joining plate 60 is cut. Although the structure which carried out the bolt joint to the end part 56 of a large beam was taken, it is not restricted to this, You may make it reverse, and make both the one end part 60A side and the other end part 60B side of the joining plate 60 into bolt joining. Also good.

  Moreover, in 1st Embodiment mentioned above, although the structure which bolts the other end part 60B of the joining plate 60 to the edge part 56 of the cut | disconnected floor large beam was carried out in two steps up and down, it is not restricted to this, FIG. You may employ | adopt the structure shown by A) and (B). In general, in this modification, a guide pin 74 is fixed to the central portion of the elongated hole 62 on the upper stage side of the other end 60B of the joining plate 60. The guide pin 74 is inserted and positioned in the upper bolt insertion hole formed in the web of the end portion 56 of the cut floor girder, and the bolt 64 is inserted from the lower long hole 62 to the through end portion. In this configuration, the nut 66 is screwed.

  According to this configuration, the bolt joint point is changed from two places to one place, and even when the bolt is joined at one place, the guide pin 74 is inserted into the corresponding bolt insertion hole. Positioning work between 62 and the bolt insertion hole can be performed. Therefore, the work efficiency when setting the flexible joint portion 68 is greatly improved, and the work time can be shortened. As a result, the influence on one cycle of the factory production line can be made extremely small.

[Second Embodiment]
Next, with reference to FIGS, a description of a second embodiment of buildings units and the unit building using the same. The second embodiment is a reference example. Further, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

7 and 8, in the expansion unit 80 according to the second embodiment, the longitudinal end portion 82A of the floor beam 82 positioned in the short side direction is welded to the side surface of the lower end portion of the column 36. Although the point of rigid connections is the same as the first embodiment described above, it is characterized in that the flexible joint 84 is constituted by forming a pair of upper and lower slits 86.

  More specifically, slits 86 as fragile portions are formed from the upper and lower flange sides toward the center of the web in the vicinity of the longitudinal end portion 82A of the floor beam 82 positioned in the short side direction. Yes. The slit width B of the slit 86 and the slit length L on the web surface are set to a predetermined width and a predetermined length in relation to the rigidity reduction amount. The slit 86 is formed after rigidly joining the end 82 </ b> A in the longitudinal direction of the floor girder 82 positioned in the short side direction to the lower end of the column 36.

(Action / Effect)
Also according to the second embodiment, since the rigid joint portion 50 is set first and then the flexible joint portion 84 is set in the vicinity of the rigid joint portion 50, as in the first embodiment described above, The perpendicularity of the joint surface between the column 36 and the floor beam 82 at the time of rigid joining can be accurately obtained, and welding distortion and the like can be suppressed as much as possible. Therefore, the joining accuracy of the rigid joint 50 can be increased. In addition, by providing the flexible joint 84 on the floor beam 82, the amount of rigidity reduction of the flexible joint 84 can be made as designed. As a result, according to the present embodiment, it is possible to ensure a very good rigidity balance as a whole of the unit house 10, and it is possible to improve durability against earthquakes (seismic resistance).

  Moreover, according to this embodiment, since it is the structure which forms the slit 86 from the upper and lower sides in the vicinity part 82A of the longitudinal direction of the floor beam 82, the number of parts does not increase at all. Therefore, the structure can be simplified and the cost can be reduced.

  Furthermore, by changing the slit width and length of the slit 86, it is possible to easily change the degree of the fragile portion and the flexible joint portion 84. Therefore, adjustment of the rigidity reduction amount of the flexible joint portion 84 can be easily performed.

  In the second embodiment described above, the fragile portion is formed by forming the slit 86 that cuts from the top and bottom in the vicinity of the longitudinal end portion of the floor beam 82 positioned in the short side direction. Other configurations other than the slit 86 may be used. For example, instead of the slit 86, a hole for lowering rigidity may be formed so as to straddle the ridge line of the floor beam 82 that is a channel steel.

  Moreover, in 2nd Embodiment mentioned above, although the slit 86 cut | disconnected to the center of the web surface of the floor beam 82 was taken, not only this but the structure shown by FIG. 9 (A), (B) is employ | adopted. May be. In general, in this modified example, the weight reducing hole 88 is formed in the web of the floor beam 82, and the slit 90 is formed only in the upper and lower flanges passing through the center of the weight reducing hole 88. In addition, the slit 90 is formed so that it may go over the ridgeline of a flange and a web.

  According to this configuration, the weight reducing hole 88 is an existing one and is intended to be used as a fragile portion. Therefore, the existing configuration can be used effectively, and the formation range of the slit 90 can be reduced, so that the work efficiency when setting the flexible joint 92 is greatly improved and the work time can be shortened. As a result, the influence on one cycle of the factory production line can be made extremely small.

[Supplementary Explanation of Effects of First Embodiment and Second Embodiment]
Hereinafter, the effects obtained in the first embodiment and the second embodiment described above will be supplementarily described with reference to FIGS.

<Reasons to improve earthquake resistance by suppressing too high horizontal rigidity>
FIG. 10A is a plan layout view of a unit building 104 in which the left column is composed of expansion units (half units) 100 and the right column is composed of normal units 102. The point G in this figure is the center of gravity (center of weight) of this unit building 104, and the point K is the rigid center (center of horizontal rigidity). Further, the horizontal force F at the time of the earthquake acts on the center of gravity G, and the unit building 104 is deformed around the rigid center K.

  In the case of this unit building 104, since the horizontal stiffness of the X0 ramen is too high, the rigid center K is greatly shifted to the left with respect to the center of gravity G. When the deviation amount (= eccentricity) e between the center of gravity G and the rigid center K is large, when the horizontal force F during the earthquake acts on the center of gravity G, the torsional deformation of the unit building 104 becomes large, and the deformation is large as X2. May occur. Accordingly, the seismic performance is relatively low.

  On the other hand, as shown in FIG. 10 (B), in the case of the unit building 108 of the present invention in which the flexible joint 106 is set as X0, the horizontal rigidity of the X0 ramen is reduced. The rigid center K moves to the right, and the amount of deviation e from the center of gravity G decreases. Accordingly, the torsional deformation of the unit building 108 is also reduced, and no large deformation occurs in X2. Therefore, the seismic performance can be relatively improved as compared with the case of the unit building 104 shown in FIG.

  In addition, when the amount of deviation (the amount of eccentricity) e is too large, it is necessary to increase the proof stress of the unit building, the thickness of the ramen increases, and there is a disadvantage that the amount of steel used increases. In the case of this embodiment, such a disadvantage does not occur.

<Design advantages obtained by suppressing excessively high horizontal rigidity>
As shown in FIGS. 11 (A) and 11 (B), when the expansion unit 110 not provided with the flexible joint is horizontally displaced by a displacement amount δ, and FIGS. 11 (C) and 11 (D). Thus, when the expansion unit 114 provided with the flexible joint portion 112 is horizontally displaced by the same displacement amount δ, the relationship of horizontal force P1> horizontal force P2 is obtained as shown in FIG. It holds. Therefore, when this is replaced with reaction force, R1 = (H / L) × P1, R2 = (H / L) × P2 (however, H and L are constant), so that reaction force R1> reaction force R2 A relationship is established. In other words, when the horizontal rigidity is high, the reaction force R of the ramen column base is increased.

  Therefore, if the horizontal rigidity of the expansion unit is high, the force acting on the bolt that connects the building units on the upper and lower floors and the anchor bolt that connects the first floor unit and the foundation increases. Specifically, a large pulling force acts on one column base and a large compressive force acts on the other column base. For this reason, in order to withstand even if the pulling force is large, it is necessary to increase the strength of the bolts or increase the number of bolts. However, in this embodiment, since the flexible joint portion is provided on the extension unit side, such a design disadvantage does not occur.

<The rigidity balance of the entire unit building can be optimized. >
FIG. 12A schematically shows an expansion in which all are rigid joints. On the other hand, FIG. 12 (B) to FIG. 12 (I) show variations of the expansion unit in which a flexible joint is set in at least one place.

  Assuming that the horizontal rigidity K0 of the expansion unit 120A in which all joints are rigidly joined as shown in FIG. 12 (A) is 1, the flexible joint 122 is provided at one place of the floor beam as shown in FIG. 12 (B). In the case of the set expansion unit 120B, the horizontal rigidity K1 is slightly more than half of K0, and in the case of the expansion unit 120C in which the flexible joint 122 is set at two floor beams, the horizontal rigidity K2 is less than 1/3, which is smaller than this. Become. As shown in FIG. 12D, the horizontal rigidity K3 in the case of the extension unit 120D in which the flexible joint 122 is set in one place on the ceiling beam is almost the same as that in the case of K1, and as shown in FIG. The horizontal rigidity K4 in the case of the expansion unit 120E in which the flexible joint portion 122 is set at the location is substantially the same as in the case of K2.

  Further, as shown in FIG. 12 (F), the horizontal rigidity K5 of the expansion unit 120F in which the flexible joint portion 122 is set diagonally on each of the ceiling beam and the floor beam is about 1/4 of K0. ), The horizontal rigidity K6 of the expansion unit 120G in which the flexible joint 122 is set on the non-diagonal line is about 1 / 2.5 of K0.

  Furthermore, as shown in FIG. 12 (H), the horizontal rigidity K7 of the expansion unit 120H in which the flexible joints 122 are set at two locations of the ceiling beam and the floor beam is about 1/8 of K0. ), The horizontal rigidity K8 of the expansion unit 120I in which the flexible joint portion 122 is set at two places on the ceiling beam and one place on the floor beam is about 1/8 of K0.

  In this way, the horizontal rigidity K of the expansion unit 120 having a ramen structure is inevitably reduced by setting the flexible joint 122 in at least one place as compared with the expansion unit 120A in which all the joints are rigid joints. . Therefore, the expansion unit 120 having various horizontal rigidity K can be obtained according to the set position and the number of set points of the flexible joint portion 122. As a result, the rigidity balance of the entire unit building can be designed more optimally.

[Supplementary explanation of this embodiment]
In each of the embodiments described above, the present invention is applied to a general house. However, the present invention is not limited to this. Other uses (commercial use, industrial use, agricultural use, non-profit such as welfare facilities / public facilities, etc.) The present invention may also be used for unit buildings (including intended administrative uses).

  Further, in each of the above-described embodiments, the configuration in which the flexible joint portions 68 and 92 are set for each of the two ends on both ends of the floor beams 44 and 82 located on the short side is not limited thereto. As described above, it is sufficient that the soft joint portion is set in at least one place. Further, the object for providing the flexible joint is not limited to the floor beam, and may be a ceiling beam or a column. Furthermore, the place where the flexible joint is provided is not limited to the vicinity of the joint between the floor beam and the ceiling beam, or the vicinity of the floor beam or the ceiling beam in the column. You may make it set a soft junction part on the junction part itself with a beam. Moreover, although the case where the flexible junction part was set with respect to the lower floor side expansion unit was demonstrated, you may make it set not only this but a flexible junction part with respect to the upper floor side expansion unit.

It is an expansion perspective view which shows the principal part of the expansion unit in the unit house which concerns on 1st Embodiment. (A) is the top view which abbreviate | omitted the middle of the expansion unit, (B) is the elevation view. It is a perspective view which shows the state which has arrange | positioned the normal unit and the expansion unit adjacently. It is a schematic perspective view of the unit house which concerns on 1st Embodiment. (A) is explanatory drawing which shows the rigidity balance at the time of not applying this invention, (B) is explanatory drawing which shows the rigidity balance at the time of applying this invention. (A) is a top view which expands and shows the principal part of the modification of 1st Embodiment, (B) is the elevation view. It is an expansion perspective view which shows the principal part of the expansion unit in the unit house which concerns on 2nd Embodiment. (A) is the top view which abbreviate | omitted the middle of the expansion unit, (B) is the elevation view. (A) is a top view which expands and shows the principal part of the modification of 2nd Embodiment, (B) is the elevation view. It is explanatory drawing for demonstrating the reason why earthquake resistance goes up if the horizontal rigidity which is too high is suppressed. It is explanatory drawing for demonstrating the design merit obtained by suppressing the horizontal rigidity which is too high. It is explanatory drawing for demonstrating the effect that the rigidity balance of the whole unit building can be made into an optimal design.

Explanation of symbols

10 Unit housing (unit building)
18 Normal unit (first building unit)
20 Expansion unit (second building unit)
36 Column 44 Floor beam 44A Longitudinal end 50 Rigid joint 54 Part of floor beam 56 End of floor beam 60 Joint plate (joint member)
60A end 60B and the other end portion 64 bolt 66 nut 68 soft joint

Claims (5)

The dimensions of the long side direction and the height direction are set substantially the same as the normal size building unit and the short side dimension is a building unit set shorter than the normal size building unit,
After the column located in the height direction and the beam located in the short side direction are rigidly joined, the beam located in the short side direction of the beam located in the short side direction is softened at or near the junction portion with the column located in the height direction. joint is provided at least one location,
Further, the flexible joint section cuts the beam located in the short side direction in the vicinity of the joint portion with the column, and straddles a part of the beam left on the column side and the end portion of the cut beam. In this state, the joining member is arranged to rejoin both the joint member and the part of the beam left on the column side, and the joining member and the end of the cut beam. It is set by bolting at least one side,
A building unit characterized by that. The dimensions of the long side direction and the height direction are set substantially the same as the normal size building unit and the short side dimension is a building unit set shorter than the normal size building unit,
The column positioned in the height direction and the beam positioned in the short side direction are rigidly connected, and the beam positioned in the short side direction is in the vicinity of the rigid connection portion with the column positioned in the height direction The joint member is arranged in a state straddling a part of the beam left on the column side and the end portion of the cut beam, and the two are re-joined and left on the joint member and the column side. At least one flexible joint portion is set by bolt-joining at least one of the joint with a part of the beam and the joint between the joint member and the end of the cut beam,
A building unit characterized by that. The dimensions of the long side direction and the height direction are set substantially the same as the normal size building unit and the short side dimension is a building unit set shorter than the normal size building unit,
After the column located in the height direction and the beam located in the short side direction are rigidly joined, the column located in the height direction is softly connected to or near the junction portion of the beam located in the short side direction. joint is provided at least one location,
Further, the flexible joint section cuts a column located in the height direction in the vicinity of the joint portion with the beam, and straddles a part of the column left on the beam side and an end portion of the cut column. In this state, the joining member is arranged to rejoin both the joint member and the part of the pillar left on the beam side, and the joining member and the end of the cut pillar. It is set by bolting at least one side,
A building unit characterized by that. The dimensions of the long side direction and the height direction are set substantially the same as the normal size building unit and the short side dimension is a building unit set shorter than the normal size building unit,
The column located in the height direction and the beam located in the short side direction are rigidly joined, and the column located in the height direction is in the vicinity of the rigid joint portion with the beam located in the short side direction The joint member is placed in a state straddling the part of the pillar left on the beam side and the end of the cut pillar, and the two are re-joined and left on the joint member and the beam side. At least one flexible joint portion is set by bolt-joining at least one of the joining with a part of the pillar and the joining member and the end of the cut pillar,
A building unit characterized by that. A first building unit of normal size;
A second building unit according to any one of claims 1 to 4 ;
Composed of,
A unit building characterized by that.

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