JP5015110B2 - Withdrawal hardware - Google Patents

Description

  The present invention mainly relates to an attracting hardware for attracting and fastening two members in a wooden building.

  For example, in a wooden frame construction method house, a pull-down hardware (hole-down hardware) is used to prevent a column from being pulled out from the base or being pulled away from a beam due to shaking during an earthquake. Moreover, it may be used in order to prevent separation of these at the joint between the beam and the girder. The usage in this case is the same as that of a battledore.

  The attracting hardware basically includes a receiving metal fitting fixed to the column, a bolt, and a nut, and the receiving metal fitting is integrally provided with a bolt insertion portion. And, for example, to pull the column and base together and fasten them, fix the receiving bracket to the column with screws, etc., first pass the bolt through the bolt insertion part, and screw the nut to the upper end of the bolt Then, this nut is engaged with the upper surface of the bolt insertion portion. Next, a long nut or the like is connected to the upper part of the anchor bolt with the lower end of the bolt passing through the base. Then, when the nut screwed into the bolt is screwed, the column is pushed to the base side, and as a result, the column and the base are joined together.

  The attracting hardware basically has a structure as described in Patent Documents 1, 2, and 3. The hole-down hardware of Patent Document 1 has a structure in which a trapezoidal bolt insertion portion is integrally formed at the tip of a flat mounting portion, and is typical in a joint hardware standard (Z mark specification) for a wooden shaft construction method house. It is a form. The hole-down hardware (connecting metal fitting 21) of Patent Document 2 is formed by welding a substantially U-shaped bolt insertion part (consisting of a curved part 23 and both leg parts 31) to a shallow U-shaped attachment part. In the hole-down hardware (drawing metal 11) of Patent Document 3, the attachment portion and the bolt insertion portion are formed by bending from one metal plate.

Japanese Patent Laid-Open No. 10-183779 JP 2006-2382 A JP 2003-306974 A

The attracting metal of the type disclosed in Patent Documents 1 and 2 requires welding work when the receiving metal fitting and the bolt insertion part are integrated. Further, the attracting metal of the type disclosed in Patent Document 3 requires labor to manufacture because it needs to bend a relatively thick (about 6 mm) metal plate in terms of strength. Furthermore, since the mounting part has only a single plate or a rib to the extent that it becomes a shallow U-shape, if a strong pulling force is applied, the strength may be insufficient and the middle part may be deformed to swell. .
It is an object of the present invention to provide an attracting hardware that can be provided at the lowest cost with the simplest structure, has high strength, and can be used in various ways.

A metal fitting having a U-shaped receiving bracket, a bolt for drawing, a nut screwed into the bolt, and a washer.
The metal fitting has a side wall and a back wall on both sides having a U-shaped cross section. The back wall is a mounting part fixed to a pillar or vertical member of a building or a horizontal member, and the side wall is an engaging part with a bolt.
In order to engage the washer on the side wall, a window hole is formed through the side walls on both sides.
The washer is sized to be able to engage with the window holes on the side walls on both sides. A through hole through which the bolt passes is provided in the central portion of the washer.

  Fix the bracket to the column (vertical material) or horizontal member with the back wall. A washer is arranged in the front and rear direction in the window hole of the metal fitting, and when used as a hole down hardware, one end of the bolt inserted into the metal fitting from above or below is passed through the through hole of the washer and screwed into this. Engage the nut or bolt head with the washer. The other end of the bolt is fixed to a beam (upper horizontal member) or connected to an anchor bolt that penetrates a base (lower horizontal member). Next, the nut is tightened, the washer is engaged with the upper side or the lower side of the window hole, and further, the column and the base or beam are pulled by screwing.

Since the receiving metal fitting has a U-shaped cross section and only has a window hole at the end thereof, even if the material is thick, it can be easily formed by press working and can be manufactured at low cost.
Since the receiving metal has a U-shaped cross section between the side wall and the back wall on both sides, the side wall has high rigidity against bending of the receiving metal and can withstand a strong pulling force.
The bracket is U-shaped in cross section and has high rigidity against bending, and when formed long along the column, it can also be used as a reinforcing member that suppresses bending deformation of the column.

FIG. 1 shows a usage example 1 of the first embodiment, and simply shows a shaft group 5 on a wall of a wooden framed construction method structure in which left and right columns 3 and 4 are arranged between a base 1 and a beam 2. It is. Reference numeral 6 is a foundation, and reference numeral 7 is a brace. In this shaft group 5, the base 1 is fixed to the foundation 6 by anchor bolts 8, and the joints between the left and right columns 3, 4 and the base 1 and the beam 2 are respectively the attracting hardware 9 to 12 as the first embodiment. Are attracted to the base 1 and the beam 2 and are tightly coupled.
For convenience of explanation, the top and bottom of the figure is the top and bottom, the left and right are the left and right, and the expected direction of the column is the front and back. In the attracting hardware 9, the hardware may be used in the horizontal direction, but in this case, this is only for the purpose of determining the relative direction so that the top and bottom are the left and right directions.

Since the attracting hardware 9 to 12 is basically the same configuration, the attracting hardware 9 will be described as a representative.
The attracting metal 9 (FIG. 2) includes a receiving metal 13, a bolt 14 for attracting, a nut 15 screwed into the bolt 14, and a washer 16.
The receiving metal 13 is formed by press-working a rectangular steel plate having a thickness of 3.2 mm, and has a U-shaped cross section including side walls 17 and 18 and a back wall 19 on both sides. The window holes 20 and 21 are previously formed in the symmetrical positions in the portions to be the side walls 17 and 18.
The molded metal fitting 13 has an outer shape of length (vertical dimension) = 270 mm, width (horizontal dimension) = 75 mm, thickness (front / rear dimension) = 35 mm, and the window hole has a width of 45 × height of 110 mm.
Of course, this is an example, and the dimensions can be selected. For example, the thickness may be 25 to 30 mm.

The back wall 19 is an attachment portion that is fixed to a pillar or vertical member of a building, and has a plurality of screw holes (eight in the embodiment).
Both side walls 17 and 18 serve as engaging portions for locking the bolt 14 through the washer 16 at the position of the window hole 20 (21). The front and rear window holes 20 and 21 have the same size and are at the same position in the vertical direction. That is, it is formed so as to penetrate the side walls on both sides. In this embodiment, the window holes 20 and 21 are located at the center of the side walls 17 and 18 in the vertical direction.

The washer 16 is a steel material in the form of a block, and has a thickness = 16 mm (when the bolt is M16, 12 mm when M12), a width of 28.5 mm, a front-rear dimension = 50 mm, and a through-hole 22 through which the bolt 14 passes. Have. This is the size that can be engaged with the window holes 20 and 21 of the front and rear side walls 17 and 18. In this embodiment, the engagement grooves 23 are formed on one surface at intervals corresponding to the intervals between the front and rear side walls 17 and 18 of the metal fitting 13.
The bolt 14 for pulling is M16 and the nut 24 is screwed together. The through hole 22 of the washer 16 has a diameter of 18 mm (14 mm for M12).

This attracting metal 9 is used as follows.
The bracket 13 is fixed to the top of the left pillar 3 by screws with a back wall 19. The washer 16 is inserted into the window hole 20 (21) of the catch 13 from the front side with the surface having the engagement groove 23 facing upward. Next, the bolt 14 is passed through the through hole 22 of the washer 16, and the nut 15 is screwed to the lower end thereof. The upper end of the bolt 14 penetrates the beam 2 and is fixed to the beam 2 with a nut 24 with a washer.
When the bolt 14 is fixed to the beam 2 with the nut 24 with a washer, the washer 16 is pulled up in the window hole 20 (21) and engages with the upper side of the window hole 20 (21), and the upper side fits into the engagement groove 23. To do. Next, when the nut 15 is tightened, the column 3 and the beam 2 are attracted and fastened.
The pulling strength is about 20 to 25 kN (short-term allowable strength, 50 to 60 kN at the maximum strength). When the washer 16 has the engaging groove 23, the washer 16 is pulled by a pulling force, so that the deformation of the catch 13 such that the distance between the front and rear side walls 17 and 18 of the catch 13 is increased can be prevented. .
The same applies to the attracting hardware 10 at the top of the right column 4.

The attracting hardware 11 and 12 includes a receiving metal 13, a bolt 14 and a nut 15 and a washer 16 which are screwed to the bolt 14, and are the same as the attracting metals 9 and 10, but the usage is different.
The bracket 13 is fixed to the column base of the left column 3 with a back wall 19 by screws. The washer 16 is inserted into the window hole 20 (21) of the catch 13 from the front side with the surface having the engagement groove 23 facing down. Next, the bolt 14 is passed through the through hole 22 of the washer 16, and the nut 15 is screwed onto the upper end thereof. The lower end of the bolt 14 is connected to the upper portion of an additional anchor bolt 25 (FIG. 1) penetrating the base 1 with a long nut 26.

When the bolt 14 is connected to the additional anchor bolt 25 with the long nut 26, the washer 16 is pulled down in the window hole 20 (21) and engaged with the lower side of the window hole 20 (21), and the lower side of the engagement groove 23 is Mating. Next, when the nut 15 is tightened, the pillar 3 is drawn to the base 1 and fastened. As in the case of the stigma, it is possible to prevent deformation of the catch 13 such that the distance between the front and rear side walls 17 and 18 is increased by pulling the washer 16 by the engaging groove 23 of the washer 16. is there.
In the case of a new construction, the extension anchor bolt 25 is embedded and fixed in advance at the time of foundation construction. In the case of an existing house, a drill hole is made from the base 1 to the foundation 6 and the base of the additional anchor bolt 25 is fixed to the foundation 6 with an adhesive or the like.
Hereinafter, the attracted hardware is collectively referred to as attracted hardware 9.

FIG. 4 shows the receiving metal fitting 13 of the second embodiment, in which the window holes 20 (21) are arranged so as to be biased upward. The attracting metal 9 of the second embodiment is basically the same as that of the first embodiment, and includes a bolt 14, a nut 15, and a washer 16, although not shown.
Whereas the first embodiment is used as a stigma and pedestal with a window hole 20 (21) in the central portion in the longitudinal direction, the receiving bracket 13 of the second embodiment is dedicated to the stigma or pedestal (with the top and bottom reversed) Will be used). The bolt 14 for drawing can be shortened because it is exclusively used for the capital or column base.

FIG. 5 shows a metal fitting 13 according to the third embodiment, in which the window holes 20 (21) are arranged above and below. The attracting metal 9 of the third embodiment is basically the same as that of the first embodiment, and includes a bolt 14, a nut 15, and a washer 16, although not shown.
By using the upper and lower window holes 20 (21) separately for the stigma and stilt, one type of attracting hardware 9 can be used for increasing the pulling strength for the stigma and stilt, and the bolt 14 is short. Can be used.

FIG. 6 shows the metal fitting 13 of the fourth embodiment, which is longer than the first to third embodiments and has almost the same length as the pillar 3. The attracting metal 9 according to the fourth embodiment is basically the same as the third embodiment except for the length, and includes a bolt 14, a nut 15, and a washer 16 in addition to those shown in the third embodiment. As in the case, the upper and lower windows 20 (21) are provided.
When the attracting hardware 9 according to the fourth embodiment is used, the metal fitting 13 reinforces the bending of the column 3 and increases the resistance to pulling, and reduces the interlayer displacement of the second- and third-floor buildings in the event of an earthquake or strong wind. effective. Further, since the screws can be hit over a wide range during strong pulling reinforcement, the burden on the pillars can be dispersed.
It can be applied not only to the pillar 3 but also to a horizontal member such as a beam.

FIG. 7 is Example 5, and the figure shows the attracting metal 9 used on the stigma side. The fifth embodiment is basically the same as the first embodiment, and includes a metal fitting 13, a bolt 14, a nut 15, and a washer 16. In the fifth embodiment, the window hole 20 (21) of the metal fitting 13 has a width sufficiently larger than the width of the washer 16, and a protrusion 28 is provided to position the washer 16 at the center of the side.
The fact that the window hole 20 (21) of the metal fitting 13 has a width sufficiently larger than the width of the washer 16 means that it is easy to insert a tool into the window hole 20 (21) and tighten the nut 15. In addition, there is an advantage that the position of the washer 16 can be finely adjusted according to the positional deviation of the additional anchor bolt 25. However, since the position of the washer becomes unstable in the window hole 20 (21), in this embodiment 5, a protrusion 28 is provided to limit the positioning or adjustment amount of the washer 16 at the center of the window hole 20 (21). ing.

  FIG. 8 is a drawing metal of Example 6 and is illustrated as a drawing metal 11 at the column base shown in FIG. Although it is the same as the attracting metal 11 of Example 1 shown in FIG. 3, the structure of the washer 16 is different. The washer 16 in Example 6 is formed by punching a steel plate having a thickness similar to that of the metal fitting 13 into a rectangular shape. The interval between the U-shaped opposing pieces is slightly larger than the diameter of the bolt 14 and is an interval with which the nut 15 can be engaged. Further, the height h is sufficiently high, and the same strength as the washer 16 by the steel material block as in the first embodiment is exhibited.

The bolt 14 with the nut 15 screwed in is disposed between the side walls 17 and 18 of the metal fitting 13, the washer 16 is inserted into the window hole 20 (21), the nut 15 is engaged, and the washer 16 is inserted into the window hole 20. (21) Used by engaging with the lower side.
In the illustrated embodiment, the engaging groove 23 (FIG. 3) is not provided in the washer 16, but a shallow engaging groove that meshes with the lower side of the window hole 20 (21) may be provided. The engaging groove may be provided on the window hole side.

  FIG. 9 shows an attracting metal of Example 7, which is illustrated as an attracting metal 11 at the column base shown in FIG. The structures of the attracting object 11 and the washer 16 of Example 6 shown in FIG. 8 are different. Portions similar to those in the eighth embodiment are denoted by the same reference numerals and description thereof is omitted. The washer 16 of Example 7 is formed by punching a steel plate into a rectangular shape, raising both ends in the longitudinal direction, forming a U-shape, and forming an insertion hole for the bolt 14 in the flat plate portion. The distance between the raised portions is slightly larger than the distance between the side walls 17 and 18 of the metal fitting 13, and the washer 16 extends between the side walls 17 and 18 with the rising portions at both ends facing downward. Is engaged with the outside of the side walls 17 and 18 for use. The thickness of the steel plate as a raw material depends on the size of the interval between the side walls 17 and 18. When this interval is narrow, a thin steel plate can be used.

  FIG. 10 shows a usage example 2 in which the attracting hardware 9 according to the first embodiment of the present invention is used to bind the shafts of the upper floor 29 and the lower floor 30 together. That is, in the figure, the metal fittings 13a and 9b of the attracting hardware 9a and 9b, to which the column bases of the left and right tube columns 31 and 32 on the upper floor 29 and the stigma of the left and right tube columns 3 and 4 on the lower floor 30 are fixed, respectively. , 13 are connected by a bolt 14 to be drawn and tightened. The lower bolt 14 penetrates the beam 2 upward and is fixed to the beam 2 by a long nut 33 with a washer, and is connected to the upper bolt 14 via a long nut 33 with a washer. In this structure, the upper and lower receiving brackets 13 and 13 can be directly connected by long bolts penetrating the beam 2 vertically.

The tops of the left and right tube pillars 31 and 32 on the upper floor 29 and the column bases of the left and right pipe pillars 3 and 4 on the lower floor 30 are attracting hardware 9 fixed to each of the beams 34 and the lower floor 30 of the upper floor 29. Each is fixed or connected to the base 1. Other structures are the same as those in the first usage example (FIG. 1).
In this usage example 2, it is also possible to arrange the attracting hardware 9 in the lateral direction to attract the joint portion between the beam and the girder that is abutted perpendicularly to both sides thereof.

  FIG. 11 shows usage examples 3 and 4, with the left pillar 3 using the attracting hardware 9a and 9b according to the first embodiment, the working example 3, and the right pillar 4 with the attracting hardware 9c and 9d according to the third embodiment. What is used is used example 4. In either case, the receiving metal fitting 13 of the attracting metal 9 is fixed to the central part of the columns 3 and 4, and the upper and lower receiving metal objects 13 are connected by the attracting bolts 14 to be attracted.

  In the upper floor 29 and the lower floor 30, the attracting hardware 9 a, 9 b of the usage example 3 extends downward in the lower end of the bolt 14 extending upward in the window hole 20 (21) provided in the receiving metal fitting 13. The upper ends of the bolts 14 are engaged together, the upper ends of the bolts 14 extending upward of the upper metal fittings 13 on the upper floor 29 are fixed to the beams 34, and the bolts 14 extending downward are formed on the receiving metal 13 of the lower floor 30. The upper end of the bolt 14 that extends upward and the long nut 35 are connected to each other, and the bolt 14 that extends downward from the bracket 13 on the lower floor 30 is connected to the additional anchor bolt 25 via the long nut 26. Also in this case, it is possible to have a structure in which the upper and lower attracting metal fittings 9a and 9b or the receiving metal fittings 9c and 9d are coupled with one long bolt. Further, the receiving metal fittings 13b and 9d on the lower floor 30 may be directly fixed to the anchor bolts 25.

  The bolt 14 extending upward in the receiving metal 13 on the lower floor 30 is connected to the lower end of the bolt 14 extending through the beam 2 and extending downward from the receiving metal 13 on the upper floor 29. Further, the additional anchor bolt 25 is connected to a bolt 14 that penetrates the base 1 in the upward direction and extends downward in the receiving metal 13 in the lower floor 30.

In this way, in the usage example 3, the beam 34 on the upper floor 29 is directly connected to the base 1, so that the columns 31 and 3 and the horizontal member (base 1, base 2 in the two-story and three-story framed housing) It is possible to effectively enhance the pull-out strength at the joint with the beams 2 and 34).
The same applies to the usage example 4 in which the example 3 is used for the right column 4 except that the window holes 20 (21) of the metal fittings 13 are arranged vertically.

  As mentioned above, although an Example and the usage example were demonstrated, this invention is mainly aimed at providing the simplest structure as the attracting metal 9, and the attracting metal 9 is the receiving metal 13 of a U-shaped cross section. The pulling bolt 14, the nut 15 screwed onto the pulling bolt 14, and the washer 16 are configured to be used by engaging the washer 16 with the window hole 20 (21) of the receiving metal 13. is important.

  The size of the receiving bracket 13 and the bolt 14, the size of the window hole 20 (21), the shape of the washer 16, or whether or not the washer 16 has the engaging groove 23 on one surface, and the two receiving brackets 13 are coupled. Selection of whether the bolts 14 are structured so as to connect the respective brackets 13 or a single long bolt is used instead of these, and means for fixing the bolt 14 to the base 1 side or the beam 2 side Is an item that can be appropriately selected. For example, it is also possible to fix by fixing a washer embedded with a nut to a base or a beam and screwing a bolt into this instead of the extension anchor 25 and the long nut 26 or the nut 24 with a washer. In the case of a new construction, the additional anchor bolt 25 is embedded and fixed in the foundation 6 from the beginning.

Although the description has been made mainly on the shaft assembly structure as an embodiment, the present invention can be similarly applied to a frame wall construction method regarding a connection structure of vertical members and cross members.
The bolt 14 for pulling may have a head on the stigma side.
In the case of the metal fitting 13, if the window holes 20, 21 having a sufficiently large size cannot be made close to the back wall 19 due to the tool for tightening the nut, only the portions where the window holes 20, 21 are formed, The width of the side walls on both sides may be increased. Also in this case, the cross section of the receiving metal 13 is U-shaped.

The front view of the wall frame which shows the usage example 1. FIG. The perspective view which decomposes | disassembles and shows Example 1 (capital side). The perspective view which decomposes | disassembles and shows Example 1 (column base side). The perspective view which showed the receiving metal fitting of Example 2. FIG. The perspective view which showed the receiving metal fitting of Example 3. FIG. The perspective view which showed the receiving metal fitting of Example 4. FIG. FIG. 10 is a perspective view showing a receiving metal fitting of Example 5. The attracting metal of Example 6. The attracting metal of Example 7. The front view of the wall frame which shows the usage example 2. FIG. The front view of the axis | shaft group of the wall which showed the usage examples 3 and 4. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Beam 3 Left pillar 4 Right pillar 5 Wall frame 6 Foundation 7 Bracing 8 Anchor bolt 9 Attracting hardware (left stigma)
10 Pulling hardware (right capital)
11 Attraction hardware (left column base)
12 attracted hardware (right column base)
13 Bracket 14 Bolt 15 Nut 16 Washer 17 Front Side Wall 18 Rear Side Wall 19 Back Wall 20 (Front) Window Hole 21 (Rear) Window Hole 22 Through Hole 23 Engaging Groove 24 Washer Nut 25 Additional Anchor Bolt 26 Long Nut 27 Screw 28 Projection 29 Upper floor 30 Lower floor 31 (Upper floor) pipe pillar 32 (Lower floor) pipe pillar 33 Long nut with washer 34 (Upper floor) beam 35 Long nut

Claims (7)

A metal fitting with a U-shaped receiving bracket, a bolt for drawing, a nut and a washer screwed to the bolt,
The bracket is composed of a side wall and a back wall on both sides having a U-shaped cross section. The back wall is a part for fixing to a pillar or vertical member of a building, the side wall is an engagement part with a bolt, and a washer is engaged with the side wall. A window hole is formed through the side walls on both sides,
The washer is sized to fit over the window holes on the side walls on both sides and has a through hole through which the bolt passes in the center,
An attracting metal for engaging a washer with a bolt head or a nut screwed into the bolt.   There are two upper and lower window holes in the bracket, and the upper window hole becomes the engaging part when the bracket is pulled upward by the bolt, and the lower window hole is the engagement when the bracket is pulled downward by the bolt. The attracting metal according to claim 1, wherein the attracting metal is a joint part.   The receiving metal has one window hole, and the upper side of the window hole is an engaging part when the receiving metal is pulled upward by a bolt, and the lower side is an engaging part when the lower side is pulled downward. The attracting metal object according to claim 1.   The attracting metal fitting according to any one of claims 1 to 3, wherein the receiving metal fitting has a length substantially equal to a length of a pillar or vertical member of the building.   The attracting metal object according to any one of claims 1 to 4, wherein the window hole of the metal fitting is formed to have a width larger than the width of the washer.   6. The attracting metal object according to claim 5, wherein a projecting portion for determining a position of the washer is formed on a side which becomes an engaging portion of the window hole.   The washer has a front and rear engaging groove corresponding to the position of the side wall on one side.

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