JP2010116678A - Building unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building unit capable of improving rigidity against a horizontal load. <P>SOLUTION: In the building unit, anchor bolts 18 are protrusively provided downward from floor connections 15 at four corners of a unit floor frame 14, and insertion holes 22 are formed at positions closer to the center in the longitudinal direction more than the anchor bolts 18 in a floor girder 20. The anchor bolts for a building foundation are inserted into the insertion holes 22 and become fulcrums. Consequently, the deformation of the floor girder 20 which is caused when a horizontal load acts can be prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a building unit including a unit floor frame that constitutes a skeleton of a unit floor surface.

  As an example of a conventional building unit, in Patent Document 1, a joint is provided on the long side floor beam, and this joint is also joined to the foundation, thereby improving the rigidity around the joint without using a subframe. The resulting structure is shown.

However, in the structure described in Patent Document 1, it is difficult to suppress the deformation of the floor beam when a horizontal load is applied.
JP 2000-328664 A

  This invention considers the said fact and makes it a subject to obtain the building unit which can improve the rigidity with respect to a horizontal load.

  In the invention according to claim 1, at least one unit floor frame constituting the skeleton of the unit floor surface, an end side fulcrum set on the end side of the floor beam in the longitudinal direction of the unit floor frame, and The floor girder is set closer to the center in the longitudinal direction than the end side fulcrum and at least two places where the floor girder is displaced when assuming deformation of the floor girder due to horizontal load acting on the unit housing. The center fulcrum portion and the center fulcrum portion of at least one of the floor girders have a floor center beam arranged separately from the floor girder instead of the floor girder.

  In this building unit, corresponding to at least one floor girder of the unit floor frame constituting the skeleton of the unit floor surface, an end side fulcrum part on the end side of the floor girder and a center closer to the longitudinal direction than this The center fulcrum is set. In the configuration having only the end side fulcrum portions, the floor girder is easily deformed between these end side fulcrum portions due to the horizontal load. In the present invention, central fulcrum portions are set at at least two locations where the floor girder is displaced when assuming deformation of the floor girder due to the horizontal load acting on the unit housing. That is, since the floor girder is joined to the building foundation at a position where deformation is assumed, the deformation of the floor girder can be suppressed and the rigidity against the horizontal load is increased.

  Also, between the two central fulcrum portions of at least one floor girder, a floor center beam separate from the floor girder is arranged instead of the floor girder. Since the rigidity of the floor girder is enhanced at the central fulcrum part, the influence on the rigidity is small even at a portion closer to the center than the center fulcrum part, even if the floor girder is separate from the floor girder. For example, by using a member that is lighter than the large floor beam as the floor center beam, the building unit can be reduced in weight.

  In invention of Claim 2, in the invention of Claim 1, two said center fulcrum parts are installed in the same distance from the said edge part side fulcrum part.

By installing the two central fulcrum portions at the same distance from the end-side fulcrum portion in this way, there is no bias in the deformation suppression effect of the floor girder.
In the configuration in which three or more central fulcrum portions are set in one floor girder, any two of the central fulcrum portions may be installed at the same distance from the end side fulcrum portion.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the unit floor frame includes a frame main body including the two floor beams having the central fulcrum portion set thereon, A central frame that is disposed on the inner side in a plan view than the portion surrounded by the central fulcrum portion, is separate from the frame body, and includes the floor central beam.

  That is, the center fulcrum portion is set for each of the two floor beams of the frame body, and the rigidity of the unit floor frame can be secured by the frame body. And, by configuring the unit floor frame with the frame body and the central frame, a specific structure (for example, for general use, for storage under the floor, for entrance) is adopted in the central frame, and the number of building units can be increased. It becomes possible.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the central frame is removable from the frame body.

  Thereby, productivity in a factory etc. can be improved by attaching a central frame made into a module to a frame main part, for example. In addition, for example, only the central frame can be exchanged at the time of extension and renovation, etc., so that it is possible to easily cope with a floor plan change or the like.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the central frame is hooked and attached to the frame body.

  Thus, the structure which connects a center frame to a frame main body can be simplified by setting it as the structure which hooks a center frame with respect to a frame main body.

  In invention of Claim 6, in invention of any one of Claims 1-5, it provided in the floor large beam in the connection part of the said floor large beam and the said floor center beam, and it is an open cross-sectional shape. A reinforcing member for reinforcing the floor girder by closing the cross section;

  By this reinforcing member, the floor girder can be reinforced at the connection portion between the floor girder and the floor center beam, and the rigidity becomes higher.

  Since the present invention has the above-described configuration, it is possible to improve the rigidity against a horizontal load.

  In FIG. 1, the building unit 12 according to the first embodiment of the present invention is shown by enlarging a portion of a unit floor frame 14 constituting a skeleton of the unit floor surface. Although the building unit 12 has a ramen structure, in this embodiment, in particular, the unit floor frame 14 is formed in a substantially rectangular frame shape, and the column 16 erected from the four corners and the ceiling above the column 16. It is provided with a large beam (not shown), and is a box-type ramen unit housing in which each element is rigidly coupled as a whole. The floor joint 15 at the bottom of the column 16, the long floor beam 20 and the short floor beam 21 are installed on the foundation 28 (see FIG. 2) of the building, and the unit floor frame 14 according to the present invention. Is configured.

  Anchor bolts 18 that protrude downward are fixed from the floor joints 15. The anchor bolt 18 is located on the end side in the longitudinal direction of the floor beam 20 extending in the longitudinal direction in the unit floor frame 14, and is an end side fulcrum according to the present invention. Then, the anchor bolt 18 is inserted into a fixing hole (not shown) formed on the foundation 28 and fixed, thereby serving as a fulcrum when the building unit 12 is installed. In the present embodiment, the floor girder 20 extending in the longitudinal direction of the unit floor frame 14 is divided at the central portion (left and right in FIG. 1), and the floor central beam 30 is arranged at the central portion as will be described later. Although it is provided, it constitutes one floor girder 20 before splitting (in the pair of left and right). In other words, one floor girder 20 (two in the whole unit floor frame 14) is divided at the central portion.

  Further, the floor girder 20 is provided with two insertion holes 22 for each column girder at the position closer to the center in the longitudinal direction than the anchor bolt 18 (however, the position avoiding the center 20C in the longitudinal direction). It is provided equidistant from the anchor bolt 18). As shown in FIGS. 2A and 2B, anchor bolts 24 embedded in the foundation 28 are inserted into these insertion holes 22, and nuts 26 are screwed into the anchor bolts 24. Accordingly, the insertion hole 22 substantially becomes a central fulcrum portion according to the present invention, and the floor girder 20 is fixed to the foundation 28.

  Here, in FIG. 3 (A) and FIG. 3 (B), the insertion hole 22 (central fulcrum part) as in this embodiment is not provided as a comparative example (however, the anchor bolt 18 is provided). In the building unit 112 having a ramen structure, the deformation behavior when a horizontal load F1 (particularly shearing force) is applied to the unit housing during an earthquake or a strong wind is schematically shown. In this building unit 112, since the members such as the floor beam 114 and the pillar 116 are rigidly connected, the floor beam 114 is deformed into a wave shape as shown in FIG. In particular, the end 114T and the center 114C in the longitudinal direction are in the same positions as before the deformation, but are shifted from the positions before the deformation in other places. In FIG. 3, the degree of deformation of the floor beam is shown larger than the actual size for clarity of illustration.

  FIG. 3C schematically shows the deformation behavior when the same force F1 as described above acts on the unit housing in the building unit 12 of the present embodiment. In the present embodiment, an insertion hole 22 (central fulcrum portion) is provided, and the position of the insertion hole 22 is largely deviated from the position before deformation of the floor girder 20 in the comparative example shown in FIG. The position is the same as the (displaced) position. Specifically, since the displacement is the largest at a position of about ¼ of the total length as measured from the longitudinal end portion (deformation fixed end) of the floor beam 20, the central fulcrum portion is set at this position. That is, the fulcrum is set at a position where the floor girder 20 is greatly displaced in this way, and deformation of the floor girder 20 is suppressed.

  In the present embodiment, as shown in FIG. 1, a floor center beam 30 is disposed in a portion closer to the center than the insertion hole 22 instead of the floor large beam 20. As shown in FIGS. 2B and 2C, both the large floor beam 20 and the central floor beam 30 are steel materials having a substantially “C” cross section that is open toward the inside of the unit floor frame 14 (so-called grooves). Although the width W2 of the floor center beam 30 is narrower than the width W1 of the large floor beam 20, the mass per unit length is small. Note that the floor girder 20 and the floor center beam 30 may be so-called H-shaped steel or the like instead of the grooved steel.

  The floor center beam 30 is arranged in a straight line with the floor large beam 20, and these are joined by a joining member 32. The joining member 32 is formed in a substantially “C” cross section, and is joined to the floor big beam 20 and the floor central beam 30 by welding or the like so as to cover the open portions of the floor big beam 20 and the floor central beam 30. Further, the floor cross beam 20 and the floor center beam 30 having an open cross-sectional shape are closed and reinforced at the joint portion by the joint member 32. In addition, joining of the floor big beam 20 and the floor center beam 30 by the joining member 32 is possible by welding the joining member 32 to these, for example. Instead of welding, bolting or riveting may be employed.

  As shown in FIG. 1, a floor beam 34 is stretched between the floor beams 20 and the floor center beam 30 facing each other in parallel. It is joined to the floor center beam 30. Accordingly, the unit floor frame 14 includes a floor frame body 36 composed of two floor beams 20, two floor beams 21, and a floor beam 34 spanned between the floor beams 20. In the central portion of the unit floor frame 14 in the longitudinal direction, a central floor frame 38 that is separate from the floor frame main body 36 and includes the floor central beam 30 and the floor beam 34 is provided. In other words, the central frame 38 is disposed on the inner side in plan view with respect to the portion surrounded by the total four insertion holes 22 (central fulcrum portions) set in the floor girder 20.

  Next, the operation of this embodiment will be described.

  As can be seen from FIG. 1, in the present embodiment, the anchor bolt 18 is fixed to the foundation 28 at the end in the longitudinal direction of the floor beam 20, but in addition to this, FIGS. As shown in FIG. 5, the insertion hole 22 (anchor bolt 24) is fixed to the foundation 28 with the insertion hole 22 (anchor bolt 24) as a fulcrum even at a position near the center in the longitudinal direction of the floor girder 20. Here, as shown in FIG. 3B, in the configuration of the comparative example in which the fulcrum (center fulcrum portion) is not provided at the position near the center of the large floor beam 114, the rigidity with respect to the horizontal load F1 is relatively low. Therefore, the deformation of the floor girder 20 increases, and the amount of rotation of the column 16 (inclination angle from the vertical direction) also increases. On the other hand, in this embodiment, the anchor bolt 24 is inserted into the insertion hole 22, so that a fulcrum closer to the center is provided on the floor girder 20. As a result, as shown in FIG. 3C, the rigidity with respect to the horizontal load F1 is relatively higher than that of the comparative example, so that deformation of the floor beam 20 is suppressed and the rotation of the column 16 is also suppressed.

  In particular, in this embodiment, two insertion holes 22 (central fulcrum portions) are set by one floor girder 20. Even if there is only one central fulcrum portion, the effect of suppressing the deformation of the floor beam 20 can be obtained as long as the center 20C is avoided as described later. For example, as schematically shown in FIG. 3 (D), the insertion hole 22 (central fulcrum) may be provided only at one location where the deformation (displacement) of the floor girder 20 is large. The effect of suppressing becomes small.

  In addition, in the present embodiment, the insertion point 22 is formed at the position where the floor girder 20 is most deformed (position about ¼ from the end in the longitudinal direction) to set the center fulcrum part. Therefore, the effect of suppressing the deformation of the floor beam 20 is enhanced as compared with the configuration in which the center fulcrum is set at a position other than this. Further, the deformation of the floor beam 20 is considered to occur substantially point-symmetrically with respect to the center 20C (overlap by 180 ° rotation), so that the two central fulcrum parts are separated from the end side fulcrum parts (anchor bolts 18), etc. It is preferable to provide a distance position, in other words, a symmetrical position when viewed from the longitudinal center 20C, since there is no bias in the effect of suppressing deformation.

  Of course, it may be difficult to provide the insertion hole 22 (central fulcrum part) at such a position due to the overall structure of the building unit 12 and the balance with the foundation 28 to be installed. It is not limited to the positions described above. However, as can be seen from FIG. 3 (E), the center 20C in the longitudinal direction of the floor girder 20 is not substantially displaced even when deformation of the floor girder 20 is assumed. Therefore, in the configuration of FIG. 3E in which the insertion hole 22 (central fulcrum portion) is provided at the center 20C of the floor girder 20, the effect of suppressing the deformation of the floor girder 20 is small.

  In the present embodiment, a portion on the inner side in the longitudinal direction from the insertion hole 22 (central fulcrum portion) is a central floor frame 38 and is separate from the floor frame main body 36. As can be seen from FIG. 3C, the contribution to the improvement of the rigidity of the floor girder 20 is small between the central fulcrum portions. From this point of view, a floor center beam 30 having a smaller mass per unit length is used in place of the large floor beam 20 in the portion between the center fulcrum portions. For example, the floor center beam 30 can reduce the amount of steel by reducing the width W2 to such an extent that it has a cross-sectional shape having rigidity required for a vertical load. As a result, the overall rigidity of the unit floor frame 14 is secured, and the cost and weight are reduced.

  Moreover, in this embodiment, as shown also in FIG. 2, the joining member 32 is used for joining the floor large beam 20 and the floor central beam 30, and the floor large beam 20 and the floor central beam 30 are closed at the joint portion. It is reinforced with. Since the torsional resistance at the joint portion increases, inadvertent torsion during deformation of the floor girder 20 can be suppressed.

  Furthermore, in the said embodiment, the center part floor frame 38 separate from the floor frame main body 36 is provided, and also as the building unit 12 by replacing | exchanging to this with a different structure as this center part floor frame 38, It becomes possible to cope with different applications.

  For example, the center floor frame 40 shown in FIG. 4 is used for storage under the floor, and an additional beam 41 is added, and an opening 42 for accessing the floor storage is provided in the center floor frame 38. Furthermore, it is formed in the center. Moreover, the center part floor frame 44 shown in FIG. 5 is used for the entrance, and the additional beam 41 is added, and the floor beam 34 and the floor center beam 30 in the lower half in FIG. 5 are omitted. (The entrance is provided in the omitted part).

  Thus, the unit floor frame 14 having various structures can be obtained simply by replacing the central floor frame 38 with a different structure. For example, in the factory, the floor frame main body 36 is first manufactured and is used in accordance with the application. By combining the desired center floor frame, efficient factory production becomes possible. Moreover, even when the floor plan (layout) is changed at the time of extension or renovation of a building, an increase in work man-hours can be suppressed and efficient work can be performed. For example, when the position of the entrance of a building is changed, the normal central floor frame 38 and the central floor frame 44 for the entrance may be exchanged at the site of extension and renovation. In addition, only a new central floor frame 40 (or central floor frame 44) is manufactured at the factory, and the existing central floor frame 38 is replaced with the central floor frame 40 (or central floor) at the site of extension and reconstruction. It is also possible to replace the frame 44).

  When the joining member 32 is welded to the floor girder 20 or the floor center beam 30, the center floor frames 38, 40, and 44 are replaced by first cutting the joining member 32 and removing it from the floor girder 20. In addition, after the central floor frames 38, 40, and 44 are arranged, a new joining member 32 may be added and joined from the outside of the joined joining member 32 that has been cut.

  In the present embodiment, the two center fulcrum parts (insertion holes 22) are provided at a fixed distance from the end side fulcrum parts (anchor bolts 18), respectively. By providing a size variation proportional to the module for each size (a multiple of the module), it becomes easy to deal with the size variation of the building unit 12.

  6 (A) to 6 (C), the building unit 62 according to the second embodiment of the present invention is shown enlarged at the joint portion between the floor large beam 20 and the floor center beam 30. In the second embodiment, since the configuration other than the joining portion is the same as that of the first embodiment, detailed description thereof is omitted.

  In the second embodiment, the floor center beam 30 constituting the center floor frame 38 (the whole image is the same as that of the first embodiment, not shown, see FIGS. 1, 4 and 5 of the first embodiment). The hook members 64 for hooking to the floor beams 20 are attached in advance to both ends in the longitudinal direction. The hook member 64 is formed in a substantially “L” cross-section, and the upper surface 64 U comes into contact with the floor beam 20 from above, so that the floor center beam 30 is hooked on the floor beam 20. Further, the side surface 64S contacts the outer surface 20S of the floor girder 20, but when viewed from the entire unit floor frame 14, the side surface 64S of the hook member 64 contacts the outer surface 20S of each of the two floor girder 20s. The floor center beam 30 is positioned in the short direction of the unit floor frame 14 (the direction of the arrow S1 in FIG. 1).

  In the second embodiment, a reinforcing member 66 is used in place of the joining member 32 of the first embodiment because the hooking member 64 is used. The reinforcing member 66 reinforces the floor girder 20 with a closed cross section at a position closer to the insertion hole 22 as compared with the joining member 32 of the first embodiment. Since the torsion resistance of the floor girder 20 is substantially required in the vicinity of the insertion hole 22 through which the anchor bolt 24 is inserted, the torsion resistance of the floor girder 20 is also improved in the second embodiment. Thus, inadvertent twisting during deformation of the floor girder 20 can be suppressed.

  In the second embodiment configured as described above, the same operational effects as in the first embodiment can be obtained. However, the attachment (attachment) of the central floor frame 38 to the floor frame main body 36 can be performed by attaching the hook member 64. Since it only needs to hook on the end of the floor girder 20, workability is improved. For example, the replacement work of the central floor frame at the time of extension and renovation of a building is easier than in the first embodiment.

  Moreover, since the floor girder 20 is partially closed at a position close to the insertion hole 22 by the reinforcing member 66, inadvertent twisting during deformation of the floor girder 20 can be suppressed.

  In the second embodiment, the structure in which the floor center beam 30 is hooked on the floor large beam 20 is not limited to the one having the hook member 64 described above. For example, if the shape of the end of the floor center beam 30 is a shape that can be hooked to the floor large beam 20 in advance, the hooking member 64 is substantially integrated with the floor center beam 30, Score is reduced.

  In each of the above embodiments, the unit floor frame 14 is composed of the frame main body 36 and the central frame 38, but in short, the central fulcrum portion according to the present invention is provided on the floor beam 20. If it has, the effect which suppresses a deformation | transformation of the floor beam 20 will be acquired. Accordingly, it is only necessary that at least two central fulcrum portions are provided on the floor girder 20 without the central frame 38 and between the adjacent central fulcrum portions be the floor central beam. A structure in which the floor center beam is not substantially disposed between the center fulcrum portions of the two floor beams 20 may be employed. For example, what is shown in FIG. 5 corresponds to this example because the floor center beam is not arranged between the center fulcrum portions of one floor beam 20. Further, a configuration in which one floor girder 20 is continuous from one end to the other end without being divided corresponds to this example because the floor center beam is not arranged in the central portion of the floor girder 20.

  In the above description, the center fulcrum portion of the present invention is configured such that the anchor bolt 24 of the foundation 28 of the building is inserted into the insertion hole 22, but instead, for example, downward from the floor beam 20. The anchor bolt may protrude toward the base 28 and fixed to the foundation 28. On the contrary, as an end side fulcrum portion of the present invention, an insertion hole may be formed in the floor finish 15 and an anchor bolt protruding from the foundation 28 may be inserted.

  The floor girder provided with the center fulcrum portion does not need to be both of the unit floor frames, and if the center fulcrum portion is provided on one of the floor girder beams, the rigidity can be improved.

  As a building in which the building unit of the present invention is used, all building units constituting the building may be the building unit of the present invention, but the building unit of the present invention is used in at least one place. Also good. For example, the building unit of the present invention may be used in a place where the rigidity in the horizontal direction is required due to torsion of the building, and a normal building unit may be used in other places.

It is a top view which expands and shows the building unit of 1st Embodiment of this invention in the part of a unit floor frame. The building unit of 1st Embodiment of this invention is expanded partially, and (A) is a partially notched top view, (B) is a front view, (C) is CC sectional view taken on the line of (B). It is. (A)-(E) is explanatory drawing which shows notionally the deformation | transformation behavior seen from the front when a horizontal load acts on a building unit according to the difference in a fulcrum part. It is a top view which expands and shows the modification of the building unit of 1st Embodiment of this invention in the part of a unit floor frame. It is a top view which expands and shows the modification of the building unit of 1st Embodiment of this invention in the part of a unit floor frame. The building unit of 1st Embodiment of this invention is expanded partially, and (A) is a partially notched top view, (B) is a front view, (C) is CC sectional view taken on the line of (B). , (D) is a perspective view showing only the hooking member.

Explanation of symbols

12 Building unit 14 Unit floor frame 15 Floor joint (unit floor frame)
16 Column 18 Anchor bolt (end fulcrum)
20 Floor girder (unit floor frame)
22 Insertion hole (central fulcrum)
24 anchor bolt 28 foundation 30 floor central beam 32 joint member 34 floor beam 36 floor frame main body 38 central floor frame 40 central floor frame 42 opening 44 central floor frame 62 building unit 64 hook member 66 reinforcing member

Claims (6)

A unit floor frame constituting the skeleton of the unit floor surface;
An end side fulcrum set on the end side of the floor beam in the longitudinal direction of the unit floor frame;
At least two places where the floor girder is displaced when the deformation of the floor girder is assumed due to a horizontal load acting on the unit housing in the longitudinal direction of the at least one floor girder than the end side fulcrum. A central fulcrum set to
Between the central fulcrum portions of at least one floor girder, a floor center beam arranged separately from the floor girder instead of the floor girder,
Having a building unit.   The building unit according to claim 1, wherein the two central fulcrum portions are installed at the same distance from the end side fulcrum portion. The unit floor frame is
A frame body comprising two floor beams with the central fulcrum set;
A central frame that is disposed on the inner side in a plan view than the portion surrounded by the central fulcrum part and is separate from the frame body and includes the floor central beam,
The building unit according to claim 1 or 2, comprising:   The building unit according to claim 3, wherein the central frame is removable from the frame body.   The building unit according to claim 4, wherein the central frame is attached by being hooked to the frame body. A reinforcing member that is provided on a floor beam in a connection portion between the floor beam and the floor center beam, and reinforces the floor beam having an open cross-sectional shape by closing the cross-section,
The building unit according to claim 1, comprising:

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