JP2010261160A - Corner fitting and aseismic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a corner fitting having also a function of a holddown which prevents a column from coming out when an earthquake occurs and a stress to deform the structure of an axial frame is applied thereto and preventing an eccentric moment to rotate the column in the peripheral direction from being applied to the column under the stress through braces and a brace fixing plate. <P>SOLUTION: When a corner fitting 100 is fixed to the corner of an axial frame, a column extraction prevention bolt 420 of a holddown which vertically extends through a base 220 is inserted into the hollow part of a cylindrical part which is formed by a cylindrical fitting 130 fixed to the rear plate 110 and the tongue-shaped plate 120 of an L-shaped fitting. Then, the bolt can be fixed with a nut at the top end of the cylindrical fitting 130, and a brace 300 is fixed to a brace fixing plate 140 which is fixed to the cylindrical fitting 130 vertically to a rear plate 110 and a tongue-shaped plate 120 on the surface formed with the lateral center lines of a rear plate 110 and a tongue-shaped plate 120. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to corner brackets and seismic devices, and in particular, corner brackets that are fixed to corner portions of a shaft frame composed of column members, girders, and foundations of a wooden frame construction method, and corner portions that are fixed by the corner brackets. The present invention relates to a seismic device for fixing corner metal fixtures fixed to opposite corners of a shaft frame by bracing.

Conventionally, in the wooden frame construction method, a corner bracket is provided in the frame to increase the strength of the frame, or the column and the base are fixed by a hole-down bracket attached to the column and subjected to vibration caused by an earthquake, etc. A construction method for preventing omission is known. In addition, a construction method is known in which the strength of the frame is increased by putting a brace between the diagonal corners of the shaft frame.
A device has been proposed in which a hole-down fitting is mounted on the side of a pillar by combining the above construction methods, and a fixing plate for fixing a brace is provided at the same corner (for example, see Patent Documents 1 and 2). ).

JP 2002-81133 A JP 2002-339456 A

  However, if you try to attach a brace to the corner, the column retaining bolt of the hole-down bracket will be installed on the extension surface of the column core, so avoid contact with the hole-down bracket and bolt from the column core. Since the brace fixing plate was installed at the shifted position, when a stress was applied to the shaft frame structure due to an earthquake, the brace and the brace fixing plate were used. When the stress is applied to the corner bracket, there is a problem that an eccentric moment that rotates the column in the circumferential direction is applied, which causes a disadvantage in terms of yield strength, such as the column tearing.

  The present invention has been made in view of the above points, and also has a function of a hole-down fitting for preventing a column dropout when an earthquake occurs and stress is applied to deform the shaft frame structure. An object of the present invention is to provide a corner bracket and an earthquake-proof device that do not apply an eccentric moment that rotates in the circumferential direction due to the stress through the brace and the brace fixing plate.

  In the present invention, in order to solve the above-mentioned problem, the cross section of the corner metal fitting which is fixed to the corner portion of the shaft frame composed of the column member of the wooden frame construction method, the beam and the base to increase the rigidity of the wall body is L An L-shaped metal fitting formed of a back plate and a tongue-shaped plate, a cylindrical metal member fixed to the back plate and the tongue-shaped plate of the L-shaped metal member, and a cylindrical part formed by the cylindrical metal member. A through hole for passing through a hollow part a pillar retaining bolt projecting from the base or beam and passing through the tongue plate of the L-shaped bracket, and the center in the width direction of the back plate and tongue plate A corner bracket provided with a brace fixing plate fixed to the cylindrical bracket perpendicular to the back plate and the tongue plate on a surface formed by a line is provided.

  Thereby, when this corner metal fitting is fixed to the corner corner portion of the shaft frame, the bolt is attached through the hollow portion of the cylindrical portion formed by the cylindrical metal fitting fixed to the back plate and tongue plate of the L-shaped metal fitting. Can be made to function as a hole-down metal fitting, and is fixed to the cylindrical metal fitting perpendicular to the back plate and the tongue plate on the surface formed by the center line of each width direction of the back plate and the tongue plate. The brace can be fixed to the brace fixing plate.

  Further, in the present invention, the corner portion of the shaft frame composed of the column member of the wooden frame construction method, the girder beam, and the base is fixed with a corner metal fitting, and the corner metal fittings fixed to the diagonal of the shaft frame are braided together. In the seismic device to be fixed, the corner bracket has an L-shaped cross section, and is fixed to an L-shaped bracket composed of a back plate and a tongue-shaped plate, and a back plate and a tongue-shaped plate of the L-shaped bracket. A through hole for penetrating through the cylindrical plate and a tongue-shaped plate of the L-shaped bracket through a hollow part of the cylindrical portion formed by the cylindrical bracket and protruding from the base or the beam. A brace fixing plate fixed to the cylindrical fitting perpendicular to the back plate and the tongue plate is provided on a surface formed by a center line in each width direction of the back plate and the tongue plate. A seismic device characterized by the above is provided.

  Thus, when the corner bracket is fixed to the corner portion of the shaft frame, the bolt is attached through the hollow portion of the cylindrical portion formed by the cylindrical bracket fixed to the back plate and tongue plate of the L-shaped bracket. Can be made to function as a hole-down metal fitting, and is fixed to the cylindrical metal fitting perpendicularly to the back plate and the tongue plate on the surface formed by the center line of each width direction of the back plate and the tongue plate. The brace can be fixed to the brace fixing plate.

  According to the corner bracket and the earthquake-proof device of the present invention, the brace fixing plate is a cylindrical bracket perpendicular to the back plate and the tongue plate on the surface formed by the center line in the width direction of each of the back plate and the tongue plate. The bolts of the hole down metal fittings can be attached and the brace can be fixed on the center line of the column, and an earthquake occurred and stress was applied to deform the shaft frame structure. Sometimes, when the stress is applied to the corner bracket through the brace and the brace fixing plate, an eccentric moment that rotates the column in the circumferential direction is not applied. Therefore, the column can be stressed to its proof stress limit without falling off the column.

It is an upper perspective view of the corner metal fitting which concerns on this Embodiment. It is a figure which shows the state which fixed the corner metal fitting of this Embodiment to the pillar and the base. It is a top view which shows the shaft frame structure using the corner metal fitting of this Embodiment. It is the elements on larger scale of a steel pipe crossing part. It is a figure which shows the state which attached the corner metal fitting and the brace also to the adjacent shaft frame structure part. It is a figure which shows the corner metal fitting which provided the backplate long. It is the elements on larger scale of the state which attached the hole down metal fitting to the corner metal fitting.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an upper perspective view of a corner fitting according to the present embodiment.
As shown in FIG. 1, the corner fitting 100 includes a back plate 110, a tongue-like plate 120, a cylindrical fitting 130, and a brace fixing plate 140.

  The back plate 110 and the tongue plate 120 are formed by bending a single metal plate. It is welded to the back plate 110 and the tongue plate 120 so that the center in the curvature direction of the cylindrical metal fitting 130 coincides with the center in the width direction. In FIG. 1, a tubular portion is formed by welding a semi-tubular fitting as the tubular fitting 130 to the back plate 110. Further, on the side opposite to the back plate 110 in the cylindrical metal fitting 130, the stripes are the centers of the back plate 110 and the tongue plate 120 in the width direction and perpendicular to the back plate 110 and the tongue plate 120. A paddle fixing plate 140 is fixed.

  A screw for inserting a screw when fixing the corner metal fitting 100 to a pillar, a base or the like outside the portion of the back plate 110 and the tongue plate 120 where the cylindrical metal fitting 130 and the brace fixing plate 140 are fixed. A plurality of holes 111 are provided. The brace fixing plate 140 is provided with a fixing hole 141 for bolting the end of the brace.

  FIG. 1B is a transparent view in which the lower part of the cylindrical fitting 130 and the brace fixing plate 140 is omitted. As shown in FIG. 1B, the cylindrical fitting 130 of the tongue-like plate 120 is fixed. An insertion hole 121 for inserting a column retaining bolt of a hole-down metal fitting, which will be described later, is provided inside the portion.

FIG. 2 is a diagram illustrating a state in which the corner bracket according to the present embodiment is fixed to a column and a base.
As shown in FIG. 2, the corner fitting 100 is fixed to the center of the column 210 and the base 220 in the width direction at the corner of the portion where the pillar 210 and the base 220 are assembled. As described above, the corner bracket 100 is fixed to the pillar 210 and the base 220 by inserting the screw 150 through the screw hole 111 provided in the corner bracket 100.

  A brace 300 is fixed to the brace fixing plate 140 of the fixed corner fitting 100. The brace 300 is fixed by a bolt 310 by overlapping a hole provided at an end of the brace 300 and a fixing hole 141. In addition, when the high tension bolt is used for the bolt 310, the threaded portion of the bolt does not slip when stress is applied compared to a normal bolt, and the performance is further improved.

  The brace 300 is provided with a length adjusting device, and includes a steel pipe portion 320 and a male threaded rod 330. A nut 340 is welded to each end of the steel pipe portion 320 on the male screw rod 330 side. The nuts 340 are in a reverse screw relationship with each other, and the male screw rod 330 is screwed into the nut 340. The nut 340 may be a double nut.

  The male threaded rod 330 is provided with a chuck 331, and the distance between the pair of steel pipe portions 320 can be increased or decreased by turning the chuck 331 between them. Thereby, the full length of the brace 300 can be adjusted. The chuck 331 indicates a portion where the middle screw of the male screw rod 330 is not cut.

Usually, the length between the corner fittings on the diagonal line varies, but it is not necessary to prepare a brace of each length according to the length between the corner fittings on the diagonal line. In the case of a steel pipe brace, its end must be machined into a flat surface in order to fix it to the fixing plate, and the length can be increased by cutting the end of a long brace, like a wooden brace. There is a disadvantage that it cannot be adjusted. Therefore, a length adjusting mechanism using the male threaded rod 330 or the like is very useful.
Note that when the male threaded rod 330 in FIG. 2 is turned to shorten the length of the brace 300, the end of the male threaded rod 330 is accommodated in the steel pipe portion 320 of the steel pipe brace.

FIG. 3 is a plan view showing a shaft frame structure using the corner bracket of the present embodiment.
As shown in FIG. 3, the base 220 is fixed to the fabric foundation 410 using anchor bolts 400. The pillar 210 is assembled by inserting it into the mortises 221 and 231 formed in the base 220 and the beam 230, and in order to further enhance the proof stress of the shaft frame structure, the pillar 210 and the base 220 and The pillar 210 and the beam 230 are fixed.
In FIG. 3, corner metal fittings 100 are fixed to the four corners of the shaft frame structure, and the corner metal fittings 100 fixed diagonally are fixed by a brace 300 formed of a steel pipe.

The brace 300 is fixed to the corner bracket 100 with high tension bolts, and the portions where the brace 300 intersects are welded so that the semi-tubular steel pipe 350 processed into a semi-tubular shape becomes an X shape, and a screw screw 351 is provided. Pinned with. Steel pins may be used for pinning.
By welding the semi-tubular steel pipe 350 in an X shape, it is possible to reinforce the brace 300 at the steel pipe intersection so that the cross section is not broken by pinning. FIG. 4 shows a partially enlarged view of the steel pipe intersection.

FIG. 5 is a view showing a state in which corner brackets and braces are attached to adjacent shaft frame structures.
As shown in FIG. 5, it may be necessary to provide corner fittings and braces also on the shaft frame adjacent to the shaft frame where corner fittings and braces need to be provided. In that case, it may be necessary to attach the hole-down metal fitting to the part to which the corner metal fitting is attached at the same time.

  At this time, according to the corner fitting 100 according to the present embodiment, the bolt 420 of the hole down fitting can be inserted and attached to the tubular portion formed by the back plate 110 and the cylindrical fitting 130. At this time, the brace fixing plate 140 of the corner metal fitting 100 passes through the column core of the column 210 and is mounted so as to be positioned in a plane parallel to the wall, so that an earthquake occurs and the shaft frame structure is deformed. When the stress is applied to the corner bracket 100 via the brace 300 and the brace fixing plate 140, an eccentric moment that rotates the column 210 in the circumferential direction is not applied. This allows the column 210 to receive stress up to its proof stress limit.

When attaching the column-retaining bolt 420 of the hole-down fitting to the corner fitting, the corner fitting attached to the base side in the shaft frame structure has a characteristic that a large stress is applied, so it needs to be more robust.
Accordingly, when attaching the column retaining bolt 420 of the hole-down fitting to the corner fitting provided at the upper part of the shaft frame structure as in the corner fitting 100A shown in FIG. 5, the end of the cylindrical fitting of the corner fitting 100A is attached. The function as a hole-down metal fitting is not exhibited by fastening with a nut, but the function as a hole-down metal fitting can be exhibited by attaching a commercially available battledore bolt.

  On the other hand, when attaching the column-retaining bolt 420 of the hole-down fitting to the corner fitting provided at the lower portion of the shaft frame structure, such as the corner fitting 2100, the back plate is provided with a longer back plate. It can be considered that the pillar 210 is firmly attached to the pillar 210 using a through bolt 421 via a plate. As a result, the pillar 210 and the base 220 are firmly fixed to each other, and even when a large stress is applied to the corner bracket 2100 through the brace 300, the corner bracket 2100 is prevented from floating from the pillar 210 or the base 220. It becomes possible to receive stress.

FIG. 6 is a view showing a corner bracket provided with a long back plate.
As shown in FIG. 6, the corner bracket 2100 is provided with a long back plate 2110 and a through hole 2111 through which the through bolt 421 is inserted. Further, unlike the cylindrical metal fitting 130 of the corner metal fitting 100, the cylindrical metal fitting 2130 is used with one side of the square tube. In addition, the cylindrical metal fitting may have any cross-sectional shape such as a triangular prism with one side, as long as the column retaining bolt 420 of the hole down metal fitting can be inserted. Instead of this, a tubular material may be welded to the back plate and the tongue plate. Other configurations are the same as those of the corner bracket 100.

  As a result, even when a large stress is applied to the corner bracket 2100 via the brace 300 as described above, the corner bracket 2100 is prevented from being lifted off the pillar 210 or the base 220 so that the stress can be received to the maximum. Become. FIG. 7 shows a partially enlarged view of the corner fitting 2100 with the hole-down fitting 420 attached thereto.

  As described above, according to the corner bracket of the present embodiment, the hole-down bracket can be attached and the brace can be fixed, and an earthquake occurs and stress is applied to deform the shaft frame structure. Sometimes, when the stress is applied to the corner bracket through the brace and the brace fixing plate, there is no moment to turn the column in the circumferential direction. Thus, the column can be stressed up to its yield limit.

  It has been described that the back plate 110 and the tongue plate 120 are formed by bending a single metal plate. However, the back plate 110 and the tongue plate 120 are not limited to the bending process. These plates may be L-shaped by welding the plates together.

  In addition, although it has been described that the through hole 2111 of the back plate 2110 has two steps in the corner fitting 2100, it may be provided in a plurality of steps. This is to prevent the through bolts 421 from coming into contact with each other by changing the height of the through hole to be penetrated when the plurality of through bolts 421 are fixed to the same column 210.

DESCRIPTION OF SYMBOLS 100 Corner bracket 110 Back plate 111 Hole 120 Tongue plate 121 Insertion hole 130 Cylindrical bracket 140 Brace fixing plate 141 Fixing hole 150 Screw 210 Column 220 Base 300 Bracing 310 Bolt 320 Steel pipe part 330 Bar 331 Chuck 340 Nut 350 Semi-tubular Steel pipe 351 Screw screw 400 Anchor bolt 410 Fabric foundation 420 Column retaining bolt 421 Through bolt

Claims (11)

In corner brackets that are fixed to the corners of the shaft frame consisting of pillars and girders and foundations of the wooden frame construction method to increase the rigidity of the wall,
An L-shaped metal fitting comprising a back plate and a tongue plate;
A cylindrical fitting fixed to the back plate and tongue plate of the L-shaped fitting;
A through-hole for passing through the tongue-shaped plate of the L-shaped metal fitting, the column retaining bolt projecting from the base or the beam, which is passed through the hollow part of the cylindrical part formed by the cylindrical metal fitting,
A brace fixing plate fixed to the cylindrical fitting perpendicularly to the back plate and the tongue plate on the surface formed by the center line of each width direction of the back plate and the tongue plate,
Corner metal fittings characterized by comprising.   The corner fitting according to claim 1, wherein the tubular fitting has a semi-tubular fitting fixed to the back plate, and the back plate and the semi-tubular fitting form a tubular shape.   2. The corner bracket according to claim 1, wherein the L-shaped bracket is formed by bending a metal plate or by fixing a back plate and a tongue plate.   The corner fitting according to claim 1, wherein the tubular fitting is formed by fixing a semi-tubular fitting, and the semi-tubular fitting and the back plate form a tubular shape.   5. The corner fitting according to claim 4, wherein the semi-tubular fitting is U-shaped, V-shaped in cross section in the curvature direction, or an arc shape having a plurality of corners.   The corner metal fitting according to claim 1, wherein a bolt through hole for penetrating a through bolt is provided in an upper part of a portion of the back plate to which the cylindrical metal fitting is fixed.   The corner bracket according to claim 6, wherein a plurality of the bolt through holes are provided in a height direction. In a seismic device that fixes the corners of a shaft frame consisting of pillar members of a wooden frame construction method, girders and foundations with corner brackets, and fixes the corner brackets fixed to the opposite corners of the shaft frame with braces ,
The corner bracket is
An L-shaped metal fitting comprising a back plate and a tongue plate;
A cylindrical fitting fixed to the back plate and tongue plate of the L-shaped fitting;
A through-hole for passing through the tongue-shaped plate of the L-shaped metal fitting, the column retaining bolt projecting from the base or the beam, which is passed through the hollow part of the cylindrical part formed by the cylindrical metal fitting,
A brace fixing plate fixed to the cylindrical fitting perpendicularly to the back plate and the tongue plate on the surface formed by the center line of each width direction of the back plate and the tongue plate,
A seismic device characterized by comprising.   The earthquake resistant device according to claim 8, wherein the brace is formed of a steel pipe. The brace is
At least two steel pipes;
A nut related to a reverse screw is fixed to the pair of ends of the steel pipe,
The seismic device according to claim 9, wherein the fixed nuts are connected by screwing a rod-like object having a thread formed on an outer periphery thereof. In the rod-shaped object,
The seismic resistance device according to claim 10, further comprising a gripping portion for gripping the rod-like object with a tool at the intermediate position.

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