JP2011153437A - Reinforcing hardware - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide reinforcing hardware which has damping performance, can secure the strength of a building even in an aftershock, and has superior cost performance. <P>SOLUTION: This reinforcing hardware 11 includes two attachment pieces 12 which are disposed so as to connect two adjacent members 31 and brought into surface-contact with the members 31 and a crosslinking body 14 for joining the two attachment pieces 12 to each other. Fragile parts 16 the cross sectional areas of which are reduced to facilitate the deformation of the crosslinking body are provided to the crosslinking body 14. The adjacent members 31 are firmly tightened to each other by integrating the attachment pieces 12 of the reinforcing hardware 11 with the members 31 with bolts 21. Since the reinforcing hardware can exhibit the same effect as in conventional braces and bearing walls, the damping performance can be secured. Since the fragile parts 16 elastically deform or plastically deform when the deformation of the members 31 is increased, the damping performance can also be secured, loads acting on the members 31 and the attachment pieces 12 can be relieved, and these parts are prevented from being damaged. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a reinforcing hardware used for fastening two adjacent members such as columns or columns and a horizontal member.

  The wooden frame construction method, which is widely used as a building method for houses, etc., lays a foundation on the upper surface of a foundation, makes pillars upright on it, and ties a plurality of pillars with horizontal members to assemble a skeleton ing. In order to improve the strength of this skeleton, it is necessary to increase the rigidity of the fastening part between the members, but it is difficult to increase the rigidity only by the fastening part, and usually a reinforcing material such as bracing or fire-fitting is incorporated. . Bracing is arranged diagonally in a grid composed of columns and horizontal members, and restrains the inclination of the columns and displacement of the horizontal members when a horizontal force is applied due to an earthquake or the like. In addition, the firing is arranged so as to short-circuit the two members to be fastened, and prevents concentration of the load on the fastening portion. In addition, a load-bearing wall that closes a grid made up of columns and horizontal members is also an effective reinforcing means.

  Bracing, firing and bearing walls are intended to ensure “seismic resistance” that suppresses deformation of buildings in the event of an earthquake, and “seismic control” that absorbs vibration and reduces indoor damage cannot be expected. . Recently, however, a technique for suppressing vibration by incorporating a damper in the brace has been developed as in Patent Document 1 described later. The technique of Patent Document 1 is intended to be able to demonstrate the original seismic control effect without being affected by looseness in a wooden structure in which a deviation between the design dimension and the actual construction dimension is likely to occur. It is characterized in that screw portions are provided at both ends.

  In addition to Patent Document 1, the following patent documents related to the present invention are disclosed. Reference 2 uses a brace damper that functions as a brace, and is characterized by interposing a viscoelastic material at both ends of the brace damper. A simple, compact, lightweight, and inexpensive seismic damper that is suitable for wooden buildings. Realized. Reference 3 discloses a vibration control panel that is incorporated into a grid made up of two studs and two upper and lower connecting members, and divides the grid up and down into three equal parts to vibrate in the upper and lower sections. A follower plate is provided, and the central section is a simple space. By condensing the deformation into the central compartment, the shear resistance function is exhibited and efficient vibration suppression is realized.

JP 2009-228276 A Japanese Patent Laid-Open No. 2002-30828 JP 2007-138407 A

  If the current wooden frame construction method is designed and constructed correctly based on various standards, the building will not collapse even if it encounters a large-scale earthquake. However, bracing has a smaller cross-section than columns and horizontal members, and nails are often used for fastening both ends, so cracks and loosening of the nails occur during the mainshock. There is a possibility that the function cannot be performed. In addition, if you continue to use the building after an earthquake, it will be necessary to repair the damaged part. At that time, only parts that are as easy to handle as possible can be used without replacing important parts such as pillars and horizontal members. They should be replaced to save money and time.

  Bracing, firing and bearing walls are effective in improving earthquake resistance, but they do not have seismic control to absorb the impact of earthquakes. In order to ensure seismic control, a means of incorporating a damper or a viscoelastic material into the brace is effective as in Patent Document 1 and Patent Document 2 above. However, even though the effectiveness of such a technology is understood, there are many cases where the introduction is given up in terms of cost, and attention is also required for aging deterioration of resins.

  The present invention has been developed on the basis of such circumstances, and has the purpose of providing reinforcement hardware that has seismic control properties, can secure the strength of a building even in the event of an aftershock, and is excellent in cost. .

  The invention according to claim 1 for solving the above-mentioned problem is arranged so as to connect two adjacent members, two mounting pieces that are in surface contact with the members, and a bridged body that connects the two mounting pieces. The mounting piece is provided with a hole for inserting a fastening member, and the bridging body is provided with a fragile portion that is easily deformed by reducing the cross-sectional area. Reinforcing hardware.

  The reinforcement hardware according to the present invention is arranged so as to connect two adjacent members such as pillars and horizontal members, and the rigidity is improved by integrating both members, and also absorbs energy in the event of an earthquake. Is also considered, and it is composed of a mounting body at both ends and a bridged body connecting the mounting pieces. The two members incorporating the reinforcing hardware can be freely selected, such as two pillars arranged in parallel, pillars and horizontal members intersecting at right angles, and rods and thick plates. Since the present invention is supposed to be used in a wooden construction, the member is made of wood containing laminated wood in principle. However, as an exception, one member may be metal or concrete. A plurality of reinforcing hardware may be arranged side by side in order to improve the strength of the building.

  Reinforcement hardware is a strip-shaped steel plate finished in a predetermined shape, and consists of attachment pieces at both ends and a bridging body connecting the two. The individual attachment pieces are brought into contact with the side surfaces of the respective members. Furthermore, it integrates with a member using a fastening member. Even if an external force due to an earthquake or the like is applied after the mounting piece and the member are integrated, the fastening member needs to be strong enough to maintain both fastenings. Therefore, a simple member such as a wood screw should not be used as the fastening member. Specific examples of the fastening member include a lag screw or shaft having a female screw formed on the end surface, and a bolt that is screwed to the lag screw or shaft. The lag screw or shaft is embedded in the member, and the female screw is further inserted into the mounting piece. When the bolt is inserted and tightened, the reinforcement hardware and the member are integrated.

  When the mounting piece is integrated with the member, a bolt is used as described above, but a hole is provided in the mounting piece for insertion. In addition, in order to attach a reinforcement metal piece stably, it is preferable to provide two or more punching holes with respect to one attachment piece. Also, the bolts need to be strong enough not to be plastically deformed by an earthquake load.

  The cross-linked body is a band-like portion connecting two mounting pieces and has a function of connecting two members. Thus, by integrating the two members using the reinforcing hardware, the load acting on one member is transmitted to the other member via the reinforcing hardware, and the two members are integrated. It counters external forces and exerts the same effect as bracing. The reinforcing hardware only needs to have mounting pieces at both ends of the cross-linked body, and the specific shape can be freely selected. You can choose variously.

  The cross-linked body does not simply connect two members, but is characterized in that a weakened portion is provided in the middle. The fragile portion is a portion having a smaller cross-sectional area (cross-section perpendicular to the extending direction of the cross-linked body) than other portions, and inevitably has a lower strength than other portions and acts as a stress. Will also increase. Therefore, when a load that bends or pulls the crosslinked body acts, the fragile portion is elastically deformed intensively, and further plastic deformation occurs when the elastic limit is exceeded. By providing a fragile portion in this way and preferentially deforming it, it becomes easier to mitigate the impact and absorb energy, the load acting on the mounting piece and member is reduced, and the member itself and the member and attachment Breakage of the fastening portion with the piece can be prevented. In addition, the weak part should just have the area of a cross section smaller than another site | part, the specific shape is free, and there is no restriction | limiting also in the position.

  The invention according to claim 2 limits details of the fragile portion, and the fragile portion is provided in the vicinity of both ends of the cross-linked body. When the reinforcement hardware is attached so as to straddle between the two columns, it is expected that both of the two columns will be tilted by the same angle in the same direction when a horizontal load is applied due to an earthquake or the like. When the column is tilted in this way, one attachment piece moves upward and the other attachment piece moves downward. For this reason, a difference occurs in the height of the left and right mounting pieces, and an external force that bends the crosslinked body acts. At that time, if there is only one fragile part, it cannot follow the external force flexibly, and the load may concentrate on the boundary between the mounting piece and the bridge and the vicinity of the punched hole, and the original function may not be exhibited. There is.

  Therefore, as in the present invention, the weakened portion is not only provided at one place, but also at the two ends in the vicinity of the both ends of the crosslinked body, that is, in the vicinity of one member and in the vicinity of the other member. It can be bent and an unreasonable load does not act on other parts, and the original function can be exhibited.

  According to the first aspect of the present invention, a reinforcing hardware is constituted by two mounting pieces that are in surface contact with a member and a bridged body connecting the two mounting pieces, and the mounting piece and the member are formed using bolts or the like. By integrating the two members, the two members are firmly fastened, and the same effects as bracing and bearing walls can be exhibited to ensure earthquake resistance. If the deformation of the member becomes excessive, energy can be absorbed by elastic deformation or plastic deformation of the fragile part, so that vibration control is ensured, and the load acting on the member and the mounting piece is alleviated, and these parts are damaged. Can be prevented.

  Further, since the fragile portion is not destroyed even after plastic deformation, it has a predetermined strength. Therefore, even aftershocks, the same strength as the original can be maintained and the soundness of the building can be secured. Also, when repairing a building after the aftershock is over, it is only necessary to replace the plastically deformed reinforcement hardware while removing the inclination of the pillars, etc., and the time and cost required for the repair can be suppressed. Moreover, the reinforcing hardware is a simple shape obtained by processing a steel plate, and the manufacturing cost can be suppressed.

  As in the invention described in claim 2, by providing the fragile portion at two locations near both ends, when two members arranged in parallel, such as a column, are inclined in the same direction, only the fragile portion is smooth like a joint. The height difference between the left and right mounting pieces can be eliminated, and no excessive load is applied to the other parts. Therefore, it is possible to prevent the fastening portion between the column and the mounting piece and the column itself from being damaged, maintain the strength of the building even in the event of an aftershock, and only replace the reinforcing hardware when repairing.

It is a perspective view which shows the shape of the reinforcement metal fitting by this invention, and its usage example. It is a side view of the state which built the reinforcement metal fitting into the pillar. It is a side view of a state in which a column is inclined and a reinforcing metal piece is plastically deformed. It is a perspective view which shows the example of a shape of a reinforcement metal fitting. It is a perspective view which shows an example of a fastening member, and uses the shaft and a deformed steel bar as a fastening member. It is a perspective view which shows an example of a fastening member, and uses the coach bolt as a fastening member. It is a perspective view which shows the usage example of the reinforcement metal fitting of a shape different from FIG. It is a perspective view of the state which combined each element shown in FIG. It is a side view of the state which installed the pillar through the T-shaped reinforcement metal fitting. It is a perspective view which shows the other shape example about a reinforcement metal fitting.

  FIG. 1 shows the shape of a reinforcing hardware 11 according to the present invention and an example of its use. The reinforcement hardware 11 is made of a strip-shaped steel plate, and is composed of left and right attachment pieces 12 formed by bending both ends at right angles, and a bridge 14 connecting the left and right attachment pieces 12. A through hole 17 for inserting the bolt 21 is formed, and the bridging body 14 is formed with two fragile portions 16 having a reduced cross-sectional area by notching both side surfaces. And the intensity | strength of the pillar 31 improves by integrating the two pillar 31 (member) using the reinforcement metal fitting 11 similarly to a brace.

  The distance between the left and right mounting pieces 12 (the distance between the outer surfaces of the mounting pieces 12) is equal to the distance between the two pillars 31 facing each other. Makes surface contact. The reinforcing hardware 11 is not simply attached to the side surface of the column 31, and a lag screw 23, which is a fastening member, is embedded in the side surface of the column 31 in advance. The lag screw 23 is formed with spiral ridges 25 formed on the side peripheral surface thereof, and this digs into the column 31 so that the lag screw 23 is fixed in the column 31 and can be strengthened to prevent cracking. Further, female screws 24 for screwing the bolts 21 are formed on both end faces of the lag screw 23. Further, in order to screw the lag screw 23 into the column 31, a pilot hole 33 penetrating both side surfaces is processed in the column 31.

  The total length of the lag screw 23 is equal to the total length of the lower hole 33, and both end surfaces of the lag screw 23 that have been screwed are aligned with the side surface of the column 31 without any step. Therefore, when the reinforcing hardware 11 is arranged between the two pillars 31 and the hole 17 and the female screw 24 are aligned concentrically, the bolt 21 is inserted and tightened to bring the mounting piece 12 and the lag screw 23 into surface contact. Then, the pillar 31 and the reinforcing hardware 11 are integrated. At this time, the reinforcing hardware 11 is integrated with the column 31 via the bolt 21 and the lag screw 23, and a concentrated load does not act on a narrow range of the column 31, and the mounting piece 12 bites into the column 31. Absent. In addition, since the reinforcement metal object 11 cannot exhibit sufficient intensity | strength only by one piece, it arrange | positions in the up-down direction like a figure in many cases.

  FIG. 2 is a side view of the state in which the reinforcing hardware 11 is incorporated in the pillar 31. Reinforcement hardware 11 not only arranges vertically at predetermined intervals, but also arranges horizontally as shown in this figure to effectively suppress the deformation of the building in order to exhibit the same function as bracing and bearing walls. Can do. The total length of the lag screw 23 embedded in the column 31 is equal to the width of the column 31 as in FIG. 1, and any of the attachment pieces 12 is in close contact with the end surface of the lag screw 23.

  FIG. 3 is a side view of the state in which the column 31 is tilted and the reinforcing hardware 11 is plastically deformed. In this figure, two pillars 31a and 31b stand upright from the upper surface of the base 35. A horizontal member 36 is placed on the upper part of the pillar 31, and the reinforcing hardware 11 includes left and right pillars 31a and 31b. It is arranged to tie. Before the columns 31a and 31b are inclined, the left and right mounting pieces 12a and 12b are equal in height, and the bridge 14 extends horizontally. However, when a horizontal force acts on the horizontal member 36 due to an earthquake and the left and right columns 31a and 31b are tilted in the same direction, the left mounting piece 12a becomes higher and the right mounting piece 12b becomes lower as shown in the figure. . Therefore, the cross-linked body 14 is forced to undulate deformation, but the two fragile portions 16 are plastically deformed as shown in the figure, so that the difference in height between the left and right mounting pieces 12a, 12b can be absorbed without difficulty. The load acting on the mounting piece 12 and the bolt 21 is relaxed, and ideal vibration control is obtained.

  When the fragile portion 16 is plastically deformed, the reinforcing hardware 11 does not return to its original shape, but the left and right columns 31a and 31b are still fastened with the reinforcing hardware 11, and the load acts repeatedly after an aftershock or the like. Even in this case, the strength of the building can be secured. Further, due to the effect of the fragile portion 16, an excessive load does not act on the mounting piece 12 or the lag screw 23, and the column 31 and the lag screw 23 can be used continuously. Therefore, after the aftershock has converged, the building 31 can be restored to its original state by uprighting the pillar 31 and replacing only the reinforcing hardware 11.

  FIG. 4 shows an example of the shape of the reinforcing hardware 11. If the weak part 16 reduces the area of the cross section of the bridge | crosslinking body 14 locally, the form will be free. Therefore, as in the first shape example 1, the fragile portion 16 can be a hole. Further, as in shape example 2, a semicircular groove may be provided on the upper surface of the crosslinked body 14 to form the weakened portion 16. The attachment pieces 12 do not have to be aligned in the same direction, and the left attachment piece 12a can be extended downward, and the right attachment piece 12b can be extended upward. In addition, as in shape example 3, the end face of the bridge 14 can be integrated with the center of the mounting piece 12 by welding to form an H shape.

  FIG. 5 shows an example of the fastening member. The fastening member for attaching the reinforcing hardware 11 to the pillar 31 or the like is free. In addition to the case where the bolt 21 and the lag screw 23 are used as shown in FIG. 26 or deformed steel bar 29 can also be used. The shaft 26 is obtained by cutting a steel round bar to a predetermined length, and has a lateral hole 27 formed on the side peripheral surface. In addition, a pilot hole 33 for embedding the shaft 26 is processed on the side surface of the column 31. However, the drift pin 39 is driven so as to intersect with the shaft 26 because the shaft 26 is easily pulled out only by being inserted into the lower hole 33. In order to drive this drift pin 39, a pin hole 32 that intersects the lower hole 33 is processed on the side surface of the column 31. An internal thread 24 is formed on the end face of the shaft 26, and the bolt 21 is screwed into the female thread 24 to fix the reinforcing metal piece 11.

  In addition, a deformed steel bar 29 can also be used for attaching the reinforcing hardware 11, as shown in the lower part of FIG. The deformed steel bar 29 has a large number of ribs formed on the side peripheral surface to increase friction, and is normally embedded in concrete. However, as shown in this figure, the adhesive 28 is applied to the entire side peripheral surface. It can also be embedded in the pillar 31. When the adhesive 28 is hardened, the deformed steel bar 29 is integrated with the column 31 so that the reinforcing hardware 11 can be fixed. A female screw 24 for screwing the bolt 21 is also formed on the end face of the deformed steel bar 29.

  FIG. 6 also shows an example of the fastening member. In this figure, a coach bolt 22 is used as a fastening member. The coach bolt 22 is larger than a general-purpose screw nail, but can be screwed without machining the prepared hole 33 as shown in FIG. 5 and is excellent in workability. However, if the mounting piece 12 and the column 31 are brought into direct contact, when an external force is applied, the mounting piece 12 may sink into the column 31 and the reinforcing hardware 11 may not perform its original function. Accordingly, a steel plate 38 is interposed between the mounting piece 12 and the column 31 to relieve the pressure acting on the side surface of the column 31.

  FIG. 7 shows an example of use of the reinforcing hardware 11t having a shape different from that of FIG. The reinforcing hardware 11 can be used not only for connecting two parallel columns 31 as shown in FIG. 1 but also for fastening the orthogonal columns 31 and the horizontal member 36 as shown in FIG. However, the shape of the reinforcing hardware 11t is a T-shape different from that of FIG. 1 and the like, and the attachment piece 12b corresponding to the T-shaped horizontal line extends in a direction perpendicular to the bridge 14 and contacts the horizontal member 36. The other mounting piece 12a is continuous from the bridge 14 and contacts the side surface of the column 31. Moreover, the weak part 16 formed in the crosslinked body 14 is only one place.

  In order to firmly attach the reinforcing hardware 11t, the lag screws 23 and 40 are screwed into both the column 31 and the horizontal member 36. The end surfaces of the lag screws 23 and 40 are connected to the surface of the column 31 or the horizontal member 36. Consideration is given during construction so that they are lined up in the same manner. Therefore, each attachment piece 12a, 12b is integrated with the pillar 31 and the horizontal member 36 via the bolt 21 and the lag screw 23, 40, and each attachment piece 12a, 12b is embedded in the pillar 31 or the horizontal member 36. There is nothing. In addition, all the four reinforcing hardwares 11t depicted in the figure have the same shape, but are turned upside down depending on the location of use.

  FIG. 8 also uses a reinforcing hardware 11 that horizontally connects the two pillars 31 in a state where the elements shown in FIG. 7 are combined. By installing the two pillars 31 through the reinforcing hardware 11t in this way, a horizontal load due to an earthquake or the like is efficiently transmitted to the reinforcing hardware 11t, so that the fragile portion 16 functions effectively and the damping performance is improved. To do. In addition, regarding the reinforcing hardware 11t in which both ends of the column 31 are fastened to the horizontal member 36, the mounting piece 12a that is in contact with the side surface of the column 31 does not have a clear boundary with the bridge 14. However, from the actual state of use, the range in contact with the pillar 31 is the mounting piece 12a, and the range not in contact with the pillar 31 is the crosslinked body 14.

  FIG. 9 is a side view of a state in which the pillar 31 is installed through the reinforcing hardware 11t. A base 35 is laid on the upper surface of the foundation 37, a long column 34 stands upright from the upper surface of the base 35, and the horizontal member 36 is supported by the long column 34. Furthermore, in order to ensure seismic control and seismic resistance, a column 31 is disposed between the two long columns 34. The two pillars 31 are fastened to the base 35 and the horizontal member 36 via reinforcing hardware 11t arranged above and below, and the weakened portion 16 is formed in the reinforcing hardware 11t. Therefore, the horizontal load acting on the horizontal member 36 can be absorbed smoothly. In addition, the reinforcing hardware 11 that horizontally connects the two pillars 31 is also arranged. By tilting the two pillars 31 in the same direction, the reinforcing hardware 11 is deformed as shown in FIG. Can be absorbed in a composite manner.

  FIG. 10 shows another shape example of the reinforcing hardware 11. As shown in FIG. 1, the two adjacent pillars 31 can be improved in rigidity by incorporating the reinforcing hardware 11, but when it is desired to further improve the rigidity, the reinforcing hardware 11 v as shown in this figure is suitable. The reinforcing metal piece 11 in FIG. 1 has a horizontal surface (a surface having a large area) of the cross-linked body 14, but the reinforcing metal piece 11v in this figure has a vertical surface of the cross-linked body 14, and inevitably. The rigidity with respect to the load which tries to incline the column 31 is improved. In addition, the length of the attachment piece 12 is restrained so that the reinforcement hardware 11v can be fixed to the pillar 31 without trouble, and the punching holes 17 are arranged in the width direction (vertical direction in the figure). Moreover, the weak part 16 has arrange | positioned three vertically long oblong things, and has ensured fixed deformability. However, the point which attaches the reinforcement metal object 11v via the volt | bolt 21 and the lag screw 23 is the same as another form.

DESCRIPTION OF SYMBOLS 11 Reinforcement metal part 12 Attachment piece 14 Bridged body 16 Fragile part 17 Hole 21 Bolt (fastening member)
22 Coach bolt (fastening member)
23 lag screw (fastening member) (screwed into the pillar)
24 female thread 25 ridge 26 shaft (fastening member)
27 Horizontal hole 28 Adhesive 29 Deformed bar 31 Column (member)
32 Pin hole 33 Pilot hole 34 Long column 35 Base (member)
36 Horizontal members (members)
37 foundation 38 plate 39 drift pin 40 lag screw (fastening member) (screwed into the base or horizontal member)

Claims (2)

It is arranged to connect two adjacent members (31 etc.),
Two attachment pieces (12) in surface contact with the member (31 etc.) and a bridged body (14) connecting the two attachment pieces (12);
The mounting piece (12) is provided with a hole (17) for inserting the fastening member (21),
Reinforced hardware characterized in that the bridging body (14) is provided with a fragile portion (16) that is easily deformed by reducing the cross-sectional area.   The reinforcing metal fitting according to claim 1, wherein the fragile portion (16) is provided in the vicinity of both ends of the crosslinked body (14).

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