JP4691202B1 - Building reinforcement structure - Google Patents

Abstract

To provide a reinforcing structure for a building which can be easily implemented even when an opening is provided at the time of renovation.
When a part of a ceiling part 19 of a building unit 1 is cut to form an opening 190, a lower surface of the ceiling joist 192 located at or around the opening is made higher than an existing position. Apply the uplift process.
And the reinforcement ceiling joist 6 in which reinforcement with respect to the over-rolling process was performed is provided. This reinforced ceiling joist includes an upper joist 61 that is passed through the opening, a lower joist 62 that is overlapped to support one end of the upper joist from below, an upper joist and a lower joist. And an end joint fitting 63 that connects the end of the upper joist and the girder-side ceiling beam 15.
[Selection] Figure 1

Description

  The present invention relates to a reinforcing structure for a building when an opening that is opened in a vertical direction is provided in a building in which a frame structure is formed by beams and pillars.

  Conventionally, in order to form an opening, such as an atrium, in a unit building as a building, reinforcement of a unit building in which a reinforcing member (stiffener) is welded or bolted to a floor beam or a ceiling beam located around the opening. The structure is known (see, for example, Patent Documents 1 and 2).

  The reinforcement of the opening disclosed in Patent Documents 1 and 2 is performed when a unit building is newly constructed, and since it is performed in the process of assembling the building unit at the factory, joining by welding is possible. In addition, in the case of bolt joining, there is almost no restriction on the mounting location, and it can be performed at any location.

  On the other hand, when renovating, there are cases where the floor or ceiling of an existing unit building is opened to provide a storage space, or an atrium space from the lower floor to the upper floor is provided, but the ceiling joists are cut to provide an opening. If it is notched, the strength will be lower than that of an existing unit building, so it is necessary to reinforce the opening or its periphery.

JP 2008-291489 A JP 2002-54237 A

  However, reinforcement using a welded joint as disclosed in Patent Documents 1 and 2 uses a firearm in an existing building and is difficult to implement in view of the risk of fire.

  Also, if you try to join the reinforcing member to the flange of the beam by bolting, the beams that overlap on the upper and lower floors will be in the way, and there are places where you can not drill bolt holes or screw drill screws. It cannot be reinforced.

  Accordingly, an object of the present invention is to provide a reinforcing structure for a building that can be easily implemented even when an opening is provided during refurbishment.

  In order to achieve the above object, a building reinforcing structure according to the present invention is a building reinforcing structure in which a frame structure is formed by a beam material and a column material, and an upper edge of the frame structure is a first structure. And a pair of first ceiling beams arranged substantially parallel to the direction and a pair of second ceiling beams arranged substantially parallel to the second direction substantially orthogonal to the first direction. A plurality of ceiling joists facing in the second direction are provided between the first ceiling beams at intervals in the first direction, and a part of the ceiling portion of the frame structure is cut. When the opening is formed, the ceiling joist located in the opening or the periphery thereof is subjected to a lifting process in which the lower surface is raised above the existing position.

  Here, it is possible to provide a reinforced ceiling joist that is reinforced with respect to the above-described over-rolling process. The reinforced ceiling joist includes an upper joist member that is passed to the opening, a lower joist member that is overlapped to support one end of the upper joist member from below, the upper joist member, and the lower joist member. It can be set as the structure provided with the connection metal fitting which joins material, and the end metal fitting which connects the edge part of the said upper joist material, and the said 1st ceiling beam.

  In addition, the first ceiling beam is formed of a grooved steel or a grooved steel with a lip so that the inner side of the ceiling is opened, and the end joint fitting is a lower side that forms the recess. In addition to having a washer that is placed on the flange, it may be configured to be substantially L-shaped. Furthermore, the said coupling metal fitting can be set as the structure attached ranging over the side surface of the said upper joist material and the said lower joist material.

  Further, the reinforcing ceiling joist includes a main joist member passed between the first ceiling beams and an auxiliary joist member fixed to a side surface of the main joist member, and the sub joist member is more than the main joist member. It may be configured to be formed short and at a height equal to or less than the height of the portion of the main joist that has been subjected to the over-rolling process.

  Further, at least one of the first ceiling beam or the second ceiling beam located in the opening or the periphery thereof is formed by a grooved steel or a grooved steel with a lip so that a concave portion is directed so as to open the ceiling inner side. The reinforcing beam is disposed along the first ceiling beam or the second ceiling beam on the open side of the concave portion, and the web forming the concave portion and the reinforcing beam are used to attach the reinforcing beam. It can be set as the structure connected by the bending plate-shaped connection member and fastening member in which this fixed piece was formed.

  Furthermore, the fixing pieces can be provided at a plurality of locations at intervals in the short direction of the reinforcing beam. The connecting member may be provided with a plurality of intervals in the longitudinal direction of the reinforcing beam. Further, the reinforcing beam may be a grooved steel or a grooved steel with a lip with the open side of the recess facing the open side of the recess.

  The reinforcing structure for a building according to the present invention configured as described above performs an uplifting process in which the lower surface of the ceiling joist located at the opening or its periphery is raised above the existing position.

  In this way, when an opening is provided in an existing building, an opening suitable for the purpose is constructed by removing a part of the ceiling joist that interferes with the elevator equipment and materials newly arranged in the opening. be able to.

  In addition, if a part of the existing ceiling joist is removed by the over-rolling process, the lateral stiffening rigidity may be lower than that of the existing ceiling beam. Sufficient rigidity in the direction can be ensured.

  Furthermore, if the reinforced ceiling joists are constructed by overlapping the end of the upper joist and the end of the lower joist vertically, it is easy to simply slide the upper joist and the lower joist. The distance between the first ceiling beams can be adjusted.

  Moreover, the end part of the reinforced ceiling joist and the first ceiling beam can be easily connected by providing the end fitting with a washer that is placed on the flange of the first ceiling beam. Furthermore, two members can be joined without generating the location which protrudes up and down by using the connection metal fitting attached ranging over the side surface of an upper joist material and a lower joist material.

  In addition, if it is a reinforced ceiling joist that is configured by overlapping the side joist that is formed in a size that does not protrude, on the side surface of the main joist, it is wide in the axial direction without causing a portion to protrude vertically Can be reinforced over a range. In particular, when a load is loaded from above the reinforced ceiling joists, it is easy to partially reinforce the vicinity of the loading point with the sub joists.

  Further, a reinforcing beam is arranged along the longitudinal direction of the ceiling beam located at the opening or its periphery, and the web and the reinforcing beam of the ceiling beam are formed by a bent plate-like connecting member and a fastening member on which a fixing piece is formed. By connecting, the opening can be further reinforced.

  In addition, with such a configuration, it is possible to easily attach the reinforcing beam to the ceiling beam at the time of refurbishment from the opening. Furthermore, by arranging the reinforcing beam along the ceiling beam, the strength in the weak axis direction can be increased without reducing the allowable bending stress degree in the strong axis direction of the ceiling beam. That is, since the lateral stiffening rigidity of the ceiling beam is enhanced by the arrangement of the reinforcing beams, it is possible to provide an atrium space without reducing the proof strength of the building.

  In addition, when the fixed pieces are provided at a plurality of positions at intervals in the short direction of the reinforcing beam, a cross-section close to the closed cross section is formed by the ceiling beam, the connecting member having the fixed piece, and the reinforcing beam. The allowable bending stress degree of the ceiling beam can be increased.

  In addition, when a plurality of connecting members are provided at intervals in the longitudinal direction of the reinforcing beam, the connecting member can be attached avoiding the place where the ceiling joists, end joists, various mounting brackets, etc. are attached. Therefore, it is possible to attach the reinforcing beam even if the end of the ceiling joist is left as it is or the mounting bracket is left as it is.

  In addition, when the reinforcing beam is made of channel steel with the open side of the recess facing the concave side of the ceiling beam or channel steel with a lip, the atrium space from the lower floor to the upper floor in the existing building At the time of refurbishment such as providing a flange, the rigidity in the horizontal direction can be increased as compared with the case where a plate-like reinforcing beam is used because the reinforcing beam is provided with a flange. Furthermore, since the flange of the reinforcing beam faces the ceiling beam side, the amount of protrusion to the opening can be minimized, and there is no hindrance when attaching the inner wall material or the like.

It is sectional drawing explaining the structure of the reinforcement structure of the unit building of embodiment of this invention. It is a perspective view explaining the structure of a building unit. It is sectional drawing explaining the structure of a ceiling joist. It is a perspective view explaining the structure of the reinforcement structure of the unit building of embodiment of this invention. It is sectional drawing explaining the structure of the reinforcement structure of the unit building of Example 1. FIG. It is sectional drawing seen in the AA arrow direction of FIG. It is sectional drawing explaining the attachment structure of the reinforcement beam of Example 2. FIG. It is a front view explaining the attachment structure of the reinforcement beam of Example 2. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a cross-sectional view illustrating a configuration of a reinforcing structure of a unit building as a building according to the present embodiment. Here, a unit building (not shown) is constructed by installing a plurality of building units 1 adjacent to each other as shown in FIG.

  As shown in FIG. 2, the building unit 1 includes a pillar 11,... As a pillar disposed at a corner, and a floor, a beam, spanned between the lower ends of the pillars 11,. A box-shaped frame structure (frame structure) is formed by the beams (12, 13) and the ceiling beams (15, 16) as beam members spanned between the upper ends of the columns 11,.

  This building unit 1 is formed in a rectangular shape in plan view. The floor beam on the long side (girder side) is used as the girder side floor beam 12 (first floor beam), and the floor beam on the short side (wife side) is used. The wife side floor beam 13 (second floor beam) is used. Further, the ceiling beam on the long side is referred to as the girder side ceiling beam 15, and the ceiling beam on the short side is referred to as the wife side ceiling beam 16.

  Here, the girder-side floor beam 12, the end-side floor beam 13, the girder-side ceiling beam 15, and the end-side ceiling beam 16 are formed of channel steel or channel steel with a lip. In the present embodiment, as shown by the girder-side ceiling beam 15 in FIG. 1, a substantially U-shaped channel steel in which the upper and lower flanges 152, 152 are connected by a web 151 is used. The case will be described.

  As is apparent from FIGS. 1 and 4, the groove-shaped steel (girder-side ceiling beam 15, etc.) is such that the open side of the recess formed by the flanges 152, 152 and the web 151 faces the interior side of the ceiling (opening 190 side). It has been.

  Further, as shown in FIG. 2, a plurality of floor beams 172,... Are inserted between the beam-side floor beams 12 and 12 at intervals in the long side direction (also referred to as the first direction or the beam direction). Passed. That is, the floor beam 172 is arranged substantially parallel to the short side direction (also referred to as the second direction or the wife direction), similarly to the wife side floor beam 13.

  The floor beam 172 is formed by a rectangular tubular steel pipe. Further, a mounting bracket (not shown) having a U-shaped cross-sectional view is joined to both ends of the floor beam 172, and the mounting bracket is joined to the girder floor beam 12 by welding.

  Further, a plurality of wooden floor joists 173,... Are passed between the wife side floor beams 13, 13 on the floor beam 172,. That is, the floor portion 17 includes a plurality of floor beams 172,... Passed between the girder floor beams 12, 12, and the floor beams 172,. Are mainly composed of a plurality of floor joists 173,...

  On the other hand, a plurality of wooden ceiling joists 192,... Extending in the short side direction are bridged between the girder-side ceiling beams 15, 15, and the ceiling material 191 is provided on the lower surface of the ceiling joists 192,. Is attached to form the ceiling portion 19. A wall portion 18 is provided between the columns 11 and 11.

  Further, as shown in FIG. 2, a joint frame member 14 having a substantially U-shaped cross-sectional view is disposed at a joint portion between the column 11 and the girder side floor beam 12 or the wife side floor beam 13. That is, the end face of the joining frame member 14 is brought into contact with the side surface of the column 11 and is joined by welding, and the girder-side floor beam 12 or the wife-side floor beam 13 is joined to the joining frame member 14 by welding. The joining frame member 14 is also used for joining the column 11 and the girder-side ceiling beam 15 or the wife-side ceiling beam 16.

  When renovating or remodeling, when constructing a staircase, an elevator, an atrium space or a ceiling storage in a living room or the like, a part of the ceiling portion 19 of the building unit 1 is cut to open the opening portion 190. FIG. 4 is a perspective view provided with.

  In FIG. 4, a ceiling material 191 partially cut off in accordance with the shape of the opening 190 is attached to the bottom of the ceiling joists 192. In other words, the opening 190 is opened by cutting the ceiling material 191 at the position where the opening 190 is provided, and lifting the ceiling joist 192 across the opening 190. This over-rolling process is performed when there is a problem such as interference with other members if the position of the lower surface of the existing ceiling joist 192 remains at the opening 190.

  FIG. 3 is a cutaway view of the ceiling joist 192 spanned between the girder-side ceiling beams 15 and 15 before the opening 190 is provided in order to raise the lower surface of the position of the opening 190 above the existing position. It is sectional drawing which showed ceiling joist 192A which cut off the part 192a.

  If the cutout portion 192a, which is a part of the ceiling joist 192A, is removed in this way, the lateral stiffening rigidity of the girder-side ceiling beams 15 and 15 will be lowered, but the horizontal rigidity required for the design will be reduced. Can be maintained, the existing ceiling joist 192A can be used as it is.

  On the other hand, when the horizontal rigidity required by the removal of the cut-out portion 192a cannot be ensured, the reinforcing ceiling joists 6 are disposed in the opening 190 as shown in FIGS.

  The reinforcing ceiling joists 6 are bridged between the girder-side ceiling beams 15 and 15. The reinforcing ceiling joist 6 includes an upper joist member 61 passed to the opening 190, a lower joist member 62 superimposed on one end of the upper joist member 61, an upper joist member 61, and a lower joist member 62. It mainly includes a connecting fitting 64 to be joined and an end joining fitting 63 that connects the end of the upper joist member 61 and the girder-side ceiling beam 15.

  The upper joist 61 is formed of a long wooden square. Further, the lower joist member 62 is also formed of a long wooden square member. Further, a hook 62 a for hooking on the flange 152 of the girder ceiling beam 15 is formed at one end of the lower joist member 62. Further, the upper joist member 61 or the lower joist member 62 can be formed by processing the existing ceiling joist 192 spanned over the opening 190.

  Then, the end portion of the upper joist member 61 is placed on the end portion of the lower joist member 62. Further, the upper joist member 61 and the lower joist member 62 that are overlapped are joined by a connecting metal fitting 64 that is attached across the side surfaces of the upper joist member 61 and the lower joist member 62.

  The connection fitting 64 is formed of a rectangular steel plate. Further, the coupling fitting 64 is fixed to each of the upper joist member 61 and the lower joist member 62 by screwing drill screws 66 as a fastening member. Further, the connecting metal fitting 64 is attached to both side surfaces with the upper joist member 61 and the lower joist member 62 interposed therebetween.

  As shown in FIG. 1, the end of the upper joist member 61 placed on the lower joist member 62 on the side of the beam-side ceiling beam 15 is brought into contact with the middle of the web 151. Therefore, an end fitting 63 is used to connect the end of the upper joist 61 and the girder ceiling beam 15.

  The end fitting 63 is formed at a substantially L-shaped metal fitting 631 that is disposed along both side surfaces of the upper joist member 61 and at a lower end that hangs downward from the lower surface of the upper joist member 61. The washer 632 is provided. The washer 632 is placed on the lower flange 152 of the spar-side ceiling beam 15 and is fixed to the spar-side ceiling beam 15 by a drill screw 65 as a fastening member.

  A base material 611 is interposed between the washer 632 and the end portion of the upper joist member 61. Further, the end joining metal fitting 63 is fixed to the upper joist member 61 and the base material 611 using the drill screws 66.

  Next, the effect | action of the reinforcement structure of the unit building of this Embodiment is demonstrated.

  The reinforcing structure of the unit building of the present invention configured as described above performs an uplift process in which the lower surface of the ceiling joist 192 located in the opening 190 or its periphery is raised above the existing position.

  Thus, when an opening is provided in an existing unit building, the ceiling joist 192A from which the cutout portion 192a that interferes with materials and materials newly placed in the opening 190 is removed is used as the opening suitable for the purpose. Part 190 can be constructed.

  For example, when an elevator is provided at the time of refurbishment, it may be necessary to remove the lower part of the ceiling joist 192 that obstructs the installation of the elevator in the opening 190 provided in the ceiling 19 on the top floor.

  At this time, if a part of the existing ceiling joist 192 is removed by the over-rolling process, the lateral stiffening effect member is removed, and a horizontal load such as wind load or earthquake load is applied to the girder ceiling. The rigidity when acting from the side of the beam 15 is lowered. For this reason, it is assumed that the over-rolling process in which the horizontal rigidity is sufficiently secured by providing the reinforcing ceiling joists 6 as necessary is performed.

  Here, if the reinforced ceiling joist 6 is configured using the upper joist member 61 and the lower joist member 62 arranged vertically, it is easy to slide the upper joist member 61 and the lower joist member 62 easily. The distance between the existing girder-side ceiling beams 15 and 15 can be adjusted. Furthermore, by adjusting the length of the lower joist material 62, it is possible to easily change the range where the over-rolling process is performed.

  Further, the end joint fitting 63 attached to the end of the reinforced ceiling joist 6 is provided with a washer 632 to be placed on the flange 152 of the spar-side ceiling beam 15, so that the end of the reinforced ceiling joist 6 and the spar-side ceiling beam 15 are provided. Can be easily connected.

  Furthermore, by using the connecting metal fitting 64 attached across the side surfaces of the upper joist member 61 and the lower joist member 62, the two members can be joined without causing any members to protrude vertically. That is, if the connecting metal fitting 64 attached to the side surface is used, there is no portion protruding above and below the reinforcing ceiling joists 6, and there is no interference with other members.

  Moreover, if it is the structure which fixes the connection metal fitting 64 by screwing the drill screw 66, ... in arbitrary positions, it is not necessary to perform alignment with respect to the upper joist material 61 and the lower joist material 62 correctly. The upper joist member 61 and the lower joist member 62 can be easily joined.

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

  In the embodiment described above, the reinforced ceiling joist 6 configured by stacking two joists on the upper and lower sides has been described. However, in the first embodiment, the reinforced ceiling configured by stacking two joists on the horizontal direction. The joist 7 will be described.

  This reinforced ceiling joist 7 includes a main joist member 71 passed between the girder-side ceiling beams 15, an auxiliary joist member 72 fixed to the side surface of the main joist member 71, and the main joist member 71 and the sub joist member. A plurality of wood screws 73,.

  The main joist 71 is formed of a long wooden square. Further, the main joist 71 is formed to have a length that can be bridged between the girder-side ceiling beams 15 and 15 across the opening 190, and a hook portion 71 a that is hooked on the flange 152 of the girder-side ceiling beam 15 at the end. Is formed.

  Further, the main joist material 71 is formed with a notch portion 71b in which a lower portion of a portion arranged in the opening 190 is cut off. This notch 71b is a portion subjected to a lifting process for raising the lower surface upward from the existing position. Such a main joist material 71 is formed by processing an existing ceiling joist 192.

  On the other hand, the secondary joist member 72 is formed shorter than the main joist member 71 by a long wooden square member. Further, the secondary joist material 72 is formed to be lower than the main joist material 71. The height of the secondary joist member 72 is substantially the same as the height of the notch 71 b of the main joist member 71.

  Then, the secondary joist members 72 are overlapped so as to coincide with at least a part of the notched portion 71b of the main joist member 71 when viewed from the side, and both are joined using a plurality of wood screws 73,. (See FIG. 5).

  In the first embodiment, the receiving material 193 is placed on the reinforcing ceiling joists 7. The receiving material 193 is a member that supports a tight frame (not shown) of the folded plate roof.

  For example, when installing a solar panel on a folded-plate roof, the receiving material 193 is placed not only on the girder-side ceiling beam 15 and the wife-side ceiling beam 16 but also on the ceiling joists 192 to support the load. There is a case. In such a case, the reinforcing material is reinforced so as to support the receiving material 193 even at the position where the reinforcing ceiling joists 7 are bridged.

  The reinforced ceiling joist 7 according to the first embodiment configured as described above is configured by overlapping the sub joist member 72 having the same height as the cutout portion 71 b along the upper side surface of the main joist member 71.

  For this reason, there are no places protruding upward or downward from the main joist material 71 in other places as well as places where the opening 190 is subjected to the over-rolling process, and there is a problem such as interference with other members. Reinforcement can be performed over a wide range in the axial direction without causing it.

  In particular, when a load is loaded from above the reinforced ceiling joist 7 such as when installing a solar panel on a folded plate roof, it is easy to partially reinforce the periphery of the loading point with the sub joist member 72. .

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, Example 2 of a form different from the above-described embodiment or Example 1 will be described with reference to FIGS. The description of the same or equivalent parts as those described in the above embodiment or Example 1 will be given the same reference numerals.

  In Example 2, not only the reinforcement by the reinforcing ceiling joists 6 and 7 as described in the above embodiment or Example 1, but also at least one of the girder-side ceiling beam 15 and the wife-side ceiling beam 16 around the opening 190 is provided. The structure which reinforces directly with the reinforcement beam 5 is demonstrated.

  For example, when the large opening 190 is formed to form the blow-by space, the ceiling joist 192 may be greatly cut or cut, and the lateral stiffening rigidity of the girder-side ceiling beam 15 may be reduced.

  Further, as shown in FIG. 2, the lateral stiffening rigidity of the end-side ceiling beam 16 is ensured by end joists 194,... Passed between adjacent ceiling joists 192. When the joist 194 is removed, the lateral stiffening rigidity of the wife side ceiling beam 16 is lowered.

  Therefore, in the second embodiment, the reinforcing beam 5 is used to reinforce the girder-side ceiling beam 15 facing the opening 190. As shown in FIG. 8, the reinforcing beam 5 is a long steel material disposed along the axial direction of the girder-side ceiling beam 15.

  For example, as shown in FIG. 7, the reinforcing beam 5 is formed of channel steel having a substantially U-shape in cross section in which parallel upper and lower flanges 52 and 52 are connected by a web 51. Further, the reinforcing beam 5 is arranged on the open side of the concave portion of the girder-side ceiling beam 15 with the open side of the concave portion of the reinforcing beam 5 facing each other.

  The reinforcing beam 5 is connected to the web 151 of the girder-side ceiling beam 15 by a connecting member 53 having fixing pieces 532 and 532 formed at two positions at intervals in the vertical direction (short direction of the reinforcing beam 5). Is done. As shown in FIG. 8, a plurality of connecting members 53 are provided at intervals in the longitudinal direction of the reinforcing beam 5.

  The connecting member 53 is formed by bending a steel plate as shown in FIG. Specifically, the beam side fixing portion 531 of the connecting member 53 is formed in a flat plate shape along the web 151, and both upper and lower edges 533 and 533 of the beam side fixing portion 531 are substantially parallel to the flanges 152 and 152. It is formed by being bent at right angles.

  Then, the upper fixing piece 532 is formed by bending the upper edge portion 533 toward the reinforcing beam 5 at a right angle upward. Further, the lower fixing piece 532 is formed by bending the lower edge portion 533 on the side of the reinforcing beam 5 downward at a right angle. That is, the fixing pieces 532 and 532 formed on the upper edge and the lower edge of the connecting member 53 have a shape protruding in the upside down direction.

  The beam-side fixing portion 531 that is in contact with the web 151 of the girder-side ceiling beam 15 is fixed to the web 151 by a drill screw 534 as a fastening member. The drill screw 534 can be screwed in from the side using the opening 190.

  FIG. 8 is a front view of the reinforcing beam 5 fixed to the beam-side ceiling beam 15 by the connecting members 53, 53 as viewed from the center side of the opening 190. As shown in this figure, the web 51 of the reinforcing beam 5 is brought into contact with the fixing pieces 532 and 532 exposed on the opening 190 side, and the drill screws 534 and 534 are screwed from the opening 190 side. Thus, the reinforcing beam 5 can be easily fixed to the connecting member 53.

  In this way, the reinforcing beam 5 is disposed along the longitudinal direction of the girder-side ceiling beam 15 located in the opening 190 or the periphery thereof, and the web 151 and the reinforcing beam 5 of the girder-side ceiling beam 15 are fixed to the both ends. If the bending plate-like connecting member 53 formed with 532 and the drill screw 534 are connected, the allowable bending stress in the strong axis direction of the girder-side ceiling beam 15 itself is not lowered, and the girder-side ceiling beam 15 is reduced. The strength in the weak axis direction (the horizontal rigidity against the force acting from the side of the girder-side ceiling beam 15) can be increased.

  In this way, the reinforcing beam 5 is arranged along the longitudinal direction of the ceiling beam (15, 16) located in the opening 190 or the periphery thereof, and the web 151 and the reinforcing beam 5 of the ceiling beam (15, 16) are arranged at both ends. The opening 190 can be reinforced by being connected by a bent plate-like connecting member 53 in which the fixing pieces 532 and 532 are formed and the drill screws 534. For this reason, it is possible to newly provide an atrium space at the time of refurbishment without reducing the strength of the existing unit building.

  Further, when the fixing pieces 532 and 532 of the connecting member 53 are provided at two places in the short direction of the reinforcing beam 5, the connecting member 53 having the ceiling beam (15, 16) and the fixing pieces 532 and 532 and the reinforcing member 53 are reinforced. Since the cross section close to the closed cross section is formed with the beam 5, the allowable bending stress degree of the ceiling beam (15, 16) can be increased.

  Further, as shown in FIG. 8, by providing a plurality of connecting members 53, 53 at intervals in the longitudinal direction of the reinforcing beam 5, a ceiling joist 192, an end joist 194, various mounting brackets, and the like are provided. The connecting member 53 can be attached while avoiding the place where it was attached. For this reason, the reinforcing beam 5 can be attached even if the end portion of the ceiling joist 192 is left as it is or other members such as mounting brackets (not shown) are left as they are.

  Further, the reinforcing beam 5 is formed of a grooved steel with the opening side of the recessed part facing the opening side of the recessed part of the ceiling beam (15, 16) or a grooved steel with a lip, so that it can be installed on the existing unit building. At the time of refurbishment such as providing an atrium space from the floor to the upper floor, the rigidity in the horizontal direction can be increased as compared with the case where the reinforcing beams 5 are provided with the flanges 52, 52 compared to the case where the plate-shaped reinforcing beams are used.

  Furthermore, if the flanges 52, 52 of the reinforcing beam 5 face the ceiling beam and are accommodated in the recesses of the ceiling beam (15, 16), the amount of protrusion to the opening 190 can be minimized, It does not get in the way when attaching inner wall materials.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  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 the embodiment and the example, and the design change is within a range not departing from the gist of the present invention. Are included in the present invention.

  For example, in the above-described embodiment or example, the first ceiling beam is the girder-side ceiling beam 15 and the second ceiling beam is the wife-side ceiling beam 16, but the present invention is not limited to this. May be the wife side ceiling beam, and the second ceiling beam may be the girder side ceiling beam. Further, the lengths of the first ceiling beam and the second ceiling beam may be the same.

  Moreover, in the said embodiment or Example 1, although the reinforced ceiling joist 6 and 7 spanned between the girder-side ceiling beams 15 and 15 was demonstrated as a ceiling joist to be reinforced, it is not limited to this, The same reinforcement can be performed when the end joist 194 spanned between the wife side ceiling beam 16 and the ceiling joist 192 is lifted and processed. For example, the position of the bottom surface of the end joist 194 can be moved upward using the end joint fitting 63 described in the above embodiment.

  Further, in the above-described embodiment or example, the case where the drill screw 65, 66, 534 or the wood screw 73 is used as the fastening member has been described. However, the present invention is not limited to this. If a hole is made or an existing hole can be used, a one-side bolt, screw, screw or the like can be used as a fastening member. Further, instead of the drill screw 66, a wood screw or a nail can be used for fixing the end joining metal fitting 63 and the connection metal fitting 64. Further, a drill screw, a nail, or the like can be used instead of the wood screw 73 for joining the main joist member 71 and the sub joist member 72.

  In the embodiment or the example, the case where the opening 190 is provided in a part of the building unit 1 is described. However, the present invention is not limited to this, and the case where the opening is provided in a plurality of locations of the unit building. The present invention can also be applied.

  Furthermore, although the said embodiment or Example demonstrated the reinforcement structure of the unit building comprised by making two or more the building units 1 which are ramen structures adjacent, it is not limited to this. For example, the present invention can be applied to a steel structure building in which a frame structure assembled by a beam material and a column material using lightweight steel is formed.

1 Building unit (frame structure)
11 Pillar (column material)
12 Girder side floor beam (beam material)
13 Wife side floor beam (beam material)
15 Girder-side ceiling beam (first ceiling beam, beam material)
151 Web 152 Flange 16 Wife side ceiling beam (second ceiling beam, beam material)
DESCRIPTION OF SYMBOLS 19 Ceiling part 192,192A Ceiling joist 190 Opening part 6 Reinforcement ceiling joist 61 Upper joist member 62 Lower joist member 63 End joint metal fitting 631 Long L metal fitting 632 Washer 64 Connecting metal fitting 7 Reinforcement ceiling joist 71 Main joist material 72 Secondary joist material 5 Reinforcement beam 51 Web 52 Flange 53 Connecting member 532 Fixing piece 534 Drill screw (fastening member)

Claims (8)

A building reinforcement structure in which a frame structure is formed by beams and pillars,
The upper edge of the frame structure is a pair of first ceiling beams arranged substantially parallel to the first direction and a pair arranged substantially parallel to the second direction substantially orthogonal to the first direction. And a plurality of ceiling joists facing in the second direction are provided between the first ceiling beams at intervals in the first direction.
When the opening part is formed by cutting a part of the ceiling part of the frame structure, the uplift process for raising the lower surface above the existing position with respect to the ceiling joist located in the opening part or its periphery with a structure in which a reinforcing ceiling joists, which was carried out reinforced facilities to the,
The reinforced ceiling joists include an upper joist that is passed to the opening, a lower joist that is overlapped to support one end of the upper joist from below, and the upper joist and the lower joist. A reinforcing structure for a building , comprising: a connecting fitting that joins the upper ceiling joist and an end joining fitting that connects the end of the upper joist and the first ceiling beam . The first ceiling beam is formed of a grooved steel or a grooved steel with a lip so that the inner side of the ceiling is opened, and the end joint fitting is a lower flange that forms the recess. The reinforcing structure for a building according to claim 1 , wherein the structure has a washer to be placed on and is formed in a substantially L shape. The connecting fitting, the reinforcing structure of a building according to claim 1 or 2, characterized in that mounted over the side surface of the lower joists member and the upper joists material. A building reinforcement structure in which a frame structure is formed by beams and pillars,
The upper edge of the frame structure is a pair of first ceiling beams arranged substantially parallel to the first direction and a pair arranged substantially parallel to the second direction substantially orthogonal to the first direction. And a plurality of ceiling joists facing in the second direction are provided between the first ceiling beams at intervals in the first direction.
When the opening part is formed by cutting a part of the ceiling part of the frame structure, the uplift process for raising the lower surface above the existing position with respect to the ceiling joist located in the opening part or its periphery with a structure in which a reinforcing ceiling joists, which was carried out reinforced facilities to the,
The reinforcing ceiling joist includes a main joist member passed between the first ceiling beams and an auxiliary joist member fixed to a side surface of the main joist member, and the sub joist member is formed shorter than the main joist member. And a reinforcing structure for a building, wherein the reinforcing structure is formed to have a height equal to or less than a height of the portion of the main joist that has been over-rolled . At least one of the first ceiling beam or the second ceiling beam located in the opening or the periphery thereof is formed of a grooved steel or a grooved steel with a lip so that a concave portion is directed so that the inside of the ceiling is opened. A reinforcing beam is disposed along the first ceiling beam or the second ceiling beam on the open side of the recess,
It claims 1 to 4 and the web and the reinforcing beams forming said recess, characterized in that it is connected with the a fastening member connecting member fixing piece is formed bent plate shape for mounting the reinforcing beams The building reinforcing structure according to any one of the above. The building reinforcing structure according to claim 5 , wherein the fixed pieces are provided at a plurality of locations at intervals in a short direction of the reinforcing beam. The building reinforcing structure according to claim 5 or 6 , wherein a plurality of the connecting members are provided at intervals in the longitudinal direction of the reinforcing beam. The reinforcement beams, the open side of the recess, according to any one of claims 5 to 7, characterized in that a groove-shaped steel or lipped channel steel was facing the open side of the recess Reinforcement structure of the building.