JP6301229B2 - Anti-vibration structure of unit building and construction method thereof - Google Patents

Description

  The present invention relates to an anti-vibration structure for a unit building configured by adjoining a plurality of building units on the left and right, and a construction method thereof.

  Conventionally, when building a unit building by stacking a plurality of building units manufactured at a factory vertically and horizontally, the building unit adjacent to the left and right or between the floor beams and ceiling beams of the building units stacked vertically It is known that an anti-vibration member is interposed between the columns (see Patent Documents 1-4).

  In the unit buildings described in these documents, in order to suppress the vibration generated by the bending of floor beams and columns, a vibration isolating member having a steel plate or a laminated structure of rubber and steel plates is interposed between the beams and the columns. , Trying to suppress the occurrence of vibration.

  In Patent Document 1, a vibration isolation structure is provided for a unit building that can extend the building area beyond the limit of multiples of the building unit by connecting the building units with a space for adjusting the layout. ing.

JP 2012-207454 A Japanese Patent Publication No. 6-15785 JP 2008-121318 A JP 2002-194817 A

  However, the unit building disclosed in Patent Documents 2 to 4 is constructed by bringing building units close to each other, and a structure in which only a vibration isolating member is arranged around a slight gap is disclosed. Not too much.

  Therefore, the present invention provides an anti-vibration structure for a unit building that can connect the left and right building units to exhibit the anti-vibration function even if the gap between the building units is small, and a construction method thereof. The purpose is that.

  In order to achieve the above object, the vibration isolating structure for a unit building according to the present invention is a unit building anti-vibration structure constituted by a plurality of building units adjacent to each other on the left and right sides, each of which has a framework formed of beams and pillars. An upper surface portion spanned between the upper surfaces of the floor beams on both sides sandwiching a gap between the building units adjacent on the left and right sides, and a lower surface spanned between the lower surfaces of the floor beams on both sides sandwiching the gap And a bar-shaped connecting rod portion that connects the upper surface portion and the lower surface portion in the gap, and the upper surface portion has a guide notch for guiding the connecting rod portion from the side edge toward the center. In addition, the head of the connecting rod portion is formed to have a width wider than the guide notch.

  Here, the connecting rod portion is preferably a long bolt having a hexagonal hole in the head portion.

  A method for constructing a vibration isolating structure for a unit building according to the present invention is the above method for constructing a vibration isolating structure for a unit building, the step of attaching the connecting rod part to the lower surface part, and the first building unit A step of bringing the upper surface of the lower surface portion into contact with the lower surface of the floor beam, and temporarily fixing the connecting rod portion to be raised along a side surface of the floor beam; and the upper surface of the head and the floor beam Aligning the guide notch with the connecting rod portion between the upper and lower floor beams and accommodating the upper surface portion between the floor beam and an upper floor plate, and the first building unit installed in advance A step of adjoining the second building unit with the gap, and a step of moving the upper surface portion along the guide notch to bridge the upper surface portion between the first and second building units; The upper surface portion by fastening the connecting rod portion Characterized by comprising a step of adhering fine lower surface of each said floor beam.

  The unit building anti-vibration structure of the present invention configured as described above has a connecting rod portion directed from the side edge toward the center on the upper surface portion spanned between the upper surfaces of the floor beams of the left and right building units across the gap. A guide notch is provided for guiding. The head of the connecting rod portion is formed to have a width wider than the guide notch.

  For this reason, by sliding the upper surface part along the guide notch with respect to the connecting rod part, even if the gap between the building units is slight, the left and right building units can be connected to exhibit the vibration-proof function. it can.

  In particular, if the connecting rod part is a long bolt with a hexagonal hole in the head, it is easily tightened so that the adjacent floor beams are sandwiched between the upper surface part and the lower surface part by fastening work from above the floor. Can be done.

  In the method for constructing the vibration-proof structure for a unit building according to the present invention, the upper surface portion is accommodated between the floor beam and the floor board above the floor beam, and the upper surface along the guide notch is installed after the second building unit is installed. Move the section horizontally and bridge it between adjacent building units.

  For this reason, another building unit can be taken down straight next to the building unit to which the connection jig is temporarily fixed. Furthermore, the upper surface portion can be bridged between the floor beams and the connecting rod portion can be fastened only by work from above the floor.

It is sectional drawing explaining the structure of the vibration proof structure of the unit building of this Embodiment. It is a perspective view explaining the structure of a building unit. It is a perspective view explaining the structure of a connection jig. It is the side view which showed the state of the connection jig before an upper surface part was attached. It is a perspective view explaining the process of installing a connection jig. It is a figure explaining the state of the connection jig temporarily fixed to the building unit installed in advance, (a) is a top view, (b) is a side view. It is a figure explaining the process of aligning an upper surface part, (a) is a top view, (b) is a side view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view for explaining the structure of a vibration isolation structure for a unit building according to the present embodiment, and FIG. 2 is a perspective view for explaining a building unit 1 constituting the unit building.

  First, the structure of the unit building will be described with reference to FIG. 2. Such a unit building transports a plurality of building units 1,. The first floor is built side by side in the horizontal direction, and the upper floor is built by stacking another (upper floor) building unit 1,... On those (lower floor) building units 1,. Build.

  Here, when the building units 1 and 1 are arranged adjacent to each other on the left and right sides, as shown in FIGS.

  On the other hand, as shown in FIG. 2, the building unit 1 constituting the unit building is passed between pillars 11,... As pillar members arranged at the four corners, and lower ends of the pillars 11,. , And floor beams 12, 12A,... As beams, and ceiling beams 13, 13A,. (Framework structure).

  Here, the pillar 11 is a square steel pipe, and the floor beams 12 and 12A and the ceiling beams 13 and 13A are formed of a channel steel material having a U-shape in cross section. For example, as shown in FIG. 1, the upper surface of the floor beam 12 is formed by an upper flange 121, the lower surface is formed by a lower flange 122 substantially parallel to the upper flange 121, and the side surfaces are side edges of the upper flange 121 and the lower flange 122. It is formed by the web 123 which connects between them.

  Further, the column 11, the floor beam 12 (12 </ b> A), and the ceiling beam 13 (13 </ b> A) are welded and joined via the joining frame member 14. Further, a ceiling joist 16,... Is bridged between the ceiling beams 13, 13 in parallel, and a ceiling plate 18 is attached to the lower surface of the ceiling joist 16,.

  Moreover, between the floor beams 12 and 12, the floor beam 15, ... is passed in parallel, and the floor board 17 is affixed on the upper surface of the floor beam 15, .... Here, the floor beam 15 is fixed to the floor beam 12 via the mounting bracket 15a.

  In the present embodiment, as shown in FIG. 1, a description will be given of a vibration isolation structure for a unit building that connects floor beams 12 and 12 that are installed substantially parallel and adjacent to the left and right.

  As shown in FIG. 1, the connecting jig 2 is disposed in the gap 101 between the floor beams 12 and 12. As shown in FIGS. 1 and 3, the connecting jig 2 includes an upper surface portion 21 spanned between the upper flanges 121 and 121 of both floor beams 12 and 12 on both sides of the gap 101, and both sides of the gap 101. It has mainly the lower surface part 22 passed between the lower flanges 122 and 122, and the connecting rod part 23 which connects the upper surface part 21 and the lower surface part 22 in the clearance gap 101.

  As shown in FIGS. 3 and 7, the upper surface portion 21 is formed of a steel material having a rectangular shape in plan view having a width and length wider than the gap 101. Specifically, the band plate-shaped bottom plate portion 21b, the reinforcing ribs 21a and 21a projecting in a wall shape upward from both side edges of the bottom plate portion 21b, and the center from one side edge serving as the short side of the bottom plate portion 21b. And a guide notch 211 that is notched in a groove shape.

  Since the bending rigidity can be increased by providing reinforcing ribs 21a, 21a extending in the width direction of the gap 101 on the upper surface portion 21, the thickness of the bottom plate portion 21b does not need to be excessively increased. Can be reduced.

  Moreover, the guide notch 211 is extended | stretched in the longitudinal direction of the baseplate part 21b so that it may become substantially parallel to the reinforcement ribs 21a and 21a. Furthermore, the guide notch 211 is provided so that the substantially U-shaped groove bottom in plan view is located at the approximate center of the bottom plate portion 21b.

  On the other hand, as shown in FIGS. 3 and 7 (b), the lower surface portion 22 is formed of a rectangular steel plate having a planar shape that is substantially the same size as the upper surface portion 21, and is located near both ends in the longitudinal direction of the steel plate. Butyl tapes 22a and 22a are affixed.

  The butyl tape 22a is a vulcanized rubber sheet having adhesiveness on both sides, and has a function of closely attaching the lower surface portion 22 to the lower flange 122 of the floor beam 12 and a function as a shock absorbing material for absorbing vibration. Yes.

  And the connecting rod part 23 formed with a long bolt is attached between the butyl tapes 22a and 22a in the approximate center of the lower surface part 22. 3 and 4, the head portion 23a of the connecting rod portion 23 is provided in a columnar shape larger than the shaft portion, and a washer 23d such as a spring washer is attached to the lower end thereof.

  As shown in FIGS. 6A and 7A, the head 23a is formed to have a width (diameter) wider than the guide notch 211 in plan view. A hexagonal hole 23c is provided at the upper end of the head 23a.

  That is, when the head 23 a is tightened with the connecting rod portion 23 being passed through the guide notch 211, the jaw of the head 23 a hits the bottom plate portion 21 b around the guide notch 211, and the upper surface portion 21 can be pressed against the floor beam 12 side. it can.

  Further, a lower screw portion 23 b is provided at the lower end of the connecting rod portion 23. The lower screw portion 23 b is screwed into a female screw hole that penetrates substantially the center of the lower surface portion 22. That is, when the connecting rod portion 23 is tightened so that the lower screw portion 23b is screwed into the female screw hole of the lower surface portion 22, the lower surface portion 22 is pressed against the lower flanges 122, 122 of the floor beams 12, 12, and the upper surface portion 21 is The upper flanges 121 and 121 are pressed against the beams 12 and 12.

  In this way, the floor beams 12 and 12 on both sides sandwiching the connecting jig 2 are connected to form a vibration-proof structure in which the two floor beams 12 and 12 adjacent to each other in parallel are fluctuated integrally.

  Next, a method for constructing a vibration isolation structure for a unit building according to the present embodiment will be described with reference to FIGS.

  First, building units 1,... Are manufactured in a factory and transported to a construction site where a house is constructed. At construction sites, solid foundations and cloth foundations are constructed using reinforced concrete.

  Then, as shown in FIG. 4, the lower screw portion 23 b of the connecting rod portion 23 is screwed into the female screw hole of the lower surface portion 22 from above, and the lower end of the lower screw portion 23 b is projected below the lower surface portion 22.

  Subsequently, as shown in FIG. 5, the connecting bar portion 23 of the connecting jig 2 is temporarily fixed to the web 123 of the floor beam 12 facing the gap 101 in the first building unit 1 </ b> A previously installed. .

  This temporary fixing is performed by bringing the butyl tape 22a of the lower surface portion 22 into close contact with the lower surface of the lower flange 122 of the floor beam 12 and fastening the connecting rod portion 23 to the web 123 using the tape 23e.

  Then, the building unit 1A on the first floor is lowered on the foundation (not shown). In addition, the opening of the guide notch 211 in the upper surface portion 21 is aligned with the temporarily fixed connecting rod portion 23.

  As shown in FIG. 6B, the upper surface portion 21 is adjusted to the height (position) at which the bottom plate portion 21b is disposed between the head 23a of the connecting rod portion 23 and the upper flange 121 of the floor beam 12. It is done.

  Further, a part of the peripheral surface of the connecting rod portion 23 is fitted into the guide notch 211 of the upper surface portion 21 so that the upper surface portion 21 is accommodated between the upper flange 121 of the floor beam 12 and the floor plate 17 above it.

  Here, Fig.6 (a) is the top view which showed the state in which the upper surface part 21 was accommodated under the floor board 17 of the building unit 1A, FIG.6 (b) looked at the same state from the side. It is a side view.

  The upper surface portion 21 is accommodated so as not to protrude toward the gap 101 side from the side surface of the connecting rod portion 23. In short, the portion of the connecting jig 2 that protrudes most with respect to the gap 101 is the head portion 23a or the washer 23d of the connecting rod portion 23 excluding the lower surface portion 22.

  Then, as shown in FIG. 7, another building unit 1 </ b> B that becomes the second building unit is lowered next to the first-floor building unit 1 </ b> A that was previously lowered. Here, when the building unit 1B is lowered straight next to the building unit 1A, it is only necessary to take care that the head 23a or the washer 23d does not contact the floor beam 12 of the building unit 1B.

  Immediately after installing the building unit 1B, the upper surface portion 21 of the connecting jig 2 is only on the floor beam 12 of one building unit 1A. Therefore, the worker moves the upper surface portion 21 accommodated under the floor board 17 of the building unit 1A laterally along the guide notch 211 from the floor board 17 toward the building unit 1B.

  This lateral movement is performed until the side surface of the connecting rod portion 23 comes into contact with the groove bottom of the guide notch 211. By this operation, the connecting rod portion 23 and the head portion 23a are arranged at the approximate center of the upper surface portion 21.

  FIG. 7A is a plan view of the periphery of the floor beams 12 and 12 of the first floor building units 1A and 1B adjacent to the left and right with the gap 101 therebetween, and FIG. 7B is the same. It is the side view which looked at the state from the side.

  After the upper surface portion 21 is bridged between the floor beams 12 and 12 of the building units 1A and 1B in this way, the operator can use the hexagonal hole 23c of the head portion 23a of the connecting rod portion 23 from the floor plate 17 on the first floor. A hexagon wrench is fitted to the connecting rod part 23 to fasten it.

  Next, the function of the vibration isolation structure for a unit building and the construction method thereof according to the present embodiment will be described.

  As shown in FIG. 1, the vibration-proof structure of the unit building according to the present embodiment configured as described above is bridged between the upper flanges 121, 121 of the left and right floor beams 12, 12 across the gap 101. A guide notch 211 for guiding the connecting rod portion 23 as shown in FIG. 6A from the side edge toward the center is provided on the upper surface portion 21. Further, the head portion 23 a of the connecting rod portion 23 is formed to have a width wider than the guide notch 211.

  For this reason, by sliding the upper surface portion 21 along the guide notch 211 with respect to the connecting rod portion 23, even if the gap 101 between the building units 1 </ b> A and 1 </ b> B is slight, the space between the adjacent floor beams 12 and 12 can be reduced. The upper surface portion 21 and the lower surface portion 22 can be sandwiched and connected.

  In addition, when the left and right building units 1A and 1B are connected in a tightened state in this way, it is possible to suppress the occurrence of deformation that widens the space between the floor beams 12 and 12 adjacent to the left and right.

  That is, when the vertical load is applied to the floor surface by running on the floor plate 17 of the building units 1A and 1B or dropping an object, the floor beam 15 and the floor beam 12 are bent.

  For such a behavior, the connecting jig 2 is arranged at intervals in the longitudinal direction of the floor beam 12, and the adjacent floor beams 12 and 12 are connected to each other. By suppressing the transmission function, the anti-vibration function can be exhibited.

  Further, the upper surface portion 21 is accommodated in advance under the floor board 17 using the guide notch 211 so that the upper surface portion 21 does not protrude toward the building unit 1B side to be installed later, so that the gap 101 is slight. However, another building unit 1B can be lowered straight next to the building unit 1A to which the connection jig 2 is temporarily fixed.

  Furthermore, only the work from the top of the floor can be performed by sliding the upper surface portion 21 and spanning it between the floor beams 12 and 12 and fastening the connecting rod portion 23.

  If the connecting rod portion 23 is a long bolt having a hexagonal hole 23c in the head portion 23a, a hexagonal wrench that can be passed through even a slight gap between the floor plates 17 and 17 from above the floor. The fastening operation can be easily performed.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the anti-vibration structure of the unit building provided between the building units 1A and 1B adjacent to the first floor has been described. However, the present invention is not limited to this. It can be applied to other floors such as the second and third floors.

  Moreover, although the said embodiment demonstrated the case where the long volt | bolt in which the hexagon hole 23c was provided in the head 23a was used as the connection rod part 23, it is not limited to this, The external shape of a head is a hexagonal column. It may be a polygonal column such as. Moreover, it can also be set as the structure which attaches a nut to the upper surface part side by the head part of a long volt | bolt becoming a lower surface part side.

  Furthermore, in the said embodiment, although the upper surface part 21 in which the reinforcement ribs 21a and 21a were provided was demonstrated, it is not limited to this, An upper surface is formed by the rectangular steel plate with constant thickness similarly to the lower surface part 22. The part can be formed. On the other hand, the lower surface portion may have a reinforcing rib.

1,1A, 1B Building unit 101 Crevice 11 Column (column material)
12, 12A Floor beam (beam material)
121 Upper flange (top)
122 Lower flange (bottom surface)
13, 13A Ceiling beam (beam material)
17 Floor plate 2 Connecting jig 21 Upper surface portion 211 Guide notch 22 Lower surface portion 23 Connecting rod portion 23a Head portion 23c Hexagonal hole

Claims (3)

It is a vibration-proof structure of a unit building that is constructed by adjoining a plurality of building units that are framed by beams and pillars on the left and right,
An upper surface portion spanned between upper surfaces of floor beams on both sides sandwiching a gap between the building units adjacent to the left and right;
A lower surface portion interposed between the lower surfaces of the floor beams on both sides of the gap,
A rod-shaped connecting rod portion for connecting the upper surface portion and the lower surface portion in the gap,
The upper surface portion is provided with a guide notch for guiding the connecting rod portion from the side edge toward the center, and the head portion of the connecting rod portion is formed wider than the guide notch. Anti-vibration structure of unit building.   The vibration isolation structure for a unit building according to claim 1, wherein the connecting rod portion is a long bolt having a hexagonal hole in the head. A method for constructing a vibration-proof structure for a unit building according to claim 1 or 2,
Attaching the connecting rod portion to the lower surface portion;
A step of bringing the upper surface of the lower surface portion into contact with the lower surface of the floor beam of the first building unit, and temporarily fixing the connection bar portion in a state of being raised along the side surface of the floor beam;
Aligning the guide notch with the connecting bar between the head and the upper surface of the floor beam, and accommodating the upper surface portion between the floor beam and the floor plate above it;
A step of adjoining the second building unit with the gap with respect to the first building unit installed in advance;
Laterally moving the upper surface along the guide notch, and spanning the upper surface between the first and second building units;
A method for constructing a vibration-proof structure for a unit building, comprising: fastening the connecting rod portion to bring the upper surface portion and the lower surface portion into close contact with the floor beam.