JP2008163652A - Column base structure of wooden building, and fitting for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a column base structure which maintains sufficient strength even if a great force is applied by the shock of an earthquake and the like, and a fitting for the column base structure. <P>SOLUTION: <1> A column supporting base (b) is placed on a sill (a) by fitting an anchor bolt 14 of the sill 14 into a bolt hole 6 of a bottom plate 2; and the anchor bolt 14 is fitted into a spring 15, and screwed into a nut 17, so that the spring can be compressed and firmly fastened. <2> A connecting shaft is accepted in a slot 9, which is opened in a lower end surface, of a wooden column (d). <3> The wooden column (d) is placed on the column supporting base (b1); a bolt fitted into a spring 12 is screwed into a bolt hole 7 of a top plate 1 and a bolt receiving hole 10b of the connecting shaft, so that the spring 12 can be compressed and firmly fastened; and the bolt fitted into the spring 12 is screwed into the bolt receiving hole 10b at the upper end of the connecting shaft from a spring inserting void 9', so that the spring 12 can be compressed and firmly fastened. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a column base structure in a wooden building and a metal fitting for the column base structure.

  Various structures have been proposed for the connection between wooden columns and foundations in wooden buildings, that is, column base structures, but they can be constructed without forming large notches in the wooden columns and have high strength. As a structure, there is one disclosed in Patent Document 1.

In this method, a wooden pillar is erected and fixed above a reinforced concrete foundation via a metal base material. For fixing, a male screw is formed on the outer peripheral surface and female screws are formed on the inner surfaces at both ends. A lag screw bolt in which the formed female screw hole is formed is used.
Specifically, the wooden pillar is mounted on the upper surface of the base material fixed on the foundation by mounting a wooden pillar in which a lag screw bolt is tightly screwed in a long hole opened in the bottom surface. The bolt is screwed into the female screw hole at the lower end of the base material through the insertion hole in the upper plate portion of the base material.

JP-A-2005-232711

  However, since this wooden pillar and the base material form a completely rigid structure without play, a large force is applied in the direction in which the lag screw bolt is pulled out from the hole in the wooden pillar due to the shaking of the earthquake, etc. If the inner surface is shaved, the pulling strength is extremely reduced, and the strength of the column base structure becomes insufficient.

  Accordingly, an object of the present invention is to provide a column base structure that maintains a sufficient strength even when a large force is applied due to an earthquake or the like, and a metal fitting for the column base structure.

The present invention described in claim 1
<1> A top plate 1 having a bolt hole 7, a bottom plate 2 having a bolt hole 6, and a column support base b including side plates 3,.
<2> From a connecting shaft having bolt receiving holes 10b, 10b formed at both ends, springs 12, 12, and bolts 11, 11 screwed into the bolt receiving holes 10b, 10b to compress and tighten the springs 12, 12. A column coupling holding metal fitting c1 for coupling and holding the wooden column d on the column support base b,
<3> An anchor bolt 14 fixed to the base a, a spring 15 fitted to the anchor bolt 14, and nuts 17 to compress and tighten the spring 15,... This is a column base structure metal fitting in a wooden building including a column support base connection holding metal fitting c2 connected and held on the base a.

  The present invention according to claim 2 is a lag screw bolt in which the connecting shaft is formed with a male screw 10a on the outer peripheral surface, and can be screwed into the long hole 9 of the wooden column d to be closely fitted. 10. The column base metal fitting in a wooden building according to claim 1, wherein

The present invention described in claim 3
<1> A top plate 1 having a bolt hole 7, a bottom plate 2 having a bolt hole 6, and a column support base b including side plates 3,.
<2> A column coupling comprising a coupling shaft having male threads formed at both ends, a spring, and a nut that is screwed onto the male screw and compresses and tightens the spring, and connects and holds the wooden column d on the column support base b. Holding metal c1,
<3> An anchor bolt 14 fixed to the base a, a spring 15 fitted to the anchor bolt 14, and nuts 17 to compress and tighten the spring 15,... This is a column base structure metal fitting in a wooden building including a column support base connection holding metal fitting c2 connected and held on the base a.

  According to a fourth aspect of the present invention, there is provided the column base structure bracket in the wooden building according to the first, second or third aspect, wherein the spring is a laminated disc spring 12 obtained by superposing two disc springs.

The present invention according to claim 5 provides:
<1> A top plate 1 having a bolt hole 7, a bottom plate 2 having a bolt hole 6, and a column support base b composed of side plates 3,... On a base a, and the bolt hole 6 on the base. The anchor bolt 14 of a is mounted and mounted, a spring 15 is fitted to the anchor bolt 14, and a nut 17 is screwed to compress and tighten the spring 15.
<2> While accepting the connecting shaft in the long hole 9 whose upper and lower ends are opened in the lower end surface of the joint portion 8 of the wooden pillar d and the bottom surface of the spring insertion cavity 9 ′ formed in the side surface,
<3> The wooden column d is mounted on the top plate 1 of the column support base b, and a spring is mounted on the bolt hole 7 of the top plate 1 of the column support base b and the bolt receiving hole 10b at the lower end of the connecting shaft. 12 is screwed together and the spring 12 is compressed and tightened between the top plate 1 and
A wooden construction in which a bolt having a spring 12 fitted therein is screwed into the bolt receiving hole 10b at the upper end of the connecting shaft, and the spring 12 is compressed and tightened between the bottom surface of the spring insertion space 9 '. It is a column base structure in an object.

  According to a sixth aspect of the present invention, the connecting shaft is a lag screw bolt 10 in which a male screw 10a is formed on the outer peripheral surface and is screwed into the long hole 9 of the wooden pillar d and is closely fitted. It is a column base structure in the wooden structure of description.

The present invention described in claim 7
<1> A top plate 1 having a bolt hole 7, a bottom plate 2 having a bolt hole 6, and a column support base b composed of side plates 3,... On a base a, and the bolt hole 6 on the base. Mounted on the anchor bolt 14 of a,
A spring 15 is fitted to the anchor bolt 14 and a nut 17 is screwed to compress and tighten the spring 15.
<2> While accepting the connecting shaft in the long hole 9 whose upper and lower ends are opened in the lower end surface of the joint portion 8 of the wooden pillar d and the bottom surface of the spring insertion cavity 9 ′ formed in the side surface,
The wooden pillar d is mounted on the top plate 1 of the pillar support base b,
<3> The spring 12 is compression-tightened with the top plate 1 by screwing a nut to the lower end of the connecting shaft, and the spring 12 is screwed to the upper end of the connecting shaft. This is a column base structure in a wooden building which is compressed and tightened between the bottom surface of the spring insertion cavity 9 ′.

  According to the present invention, it is possible to provide a column base structure that retains sufficient strength even when a large force is applied due to an earthquake shake or the like.

<1> A top plate 1 having a bolt hole 7, a bottom plate 2 having a bolt hole 6, and a column support base b composed of side plates 3,... On a base a, and the bolt hole 6 on the base. To be mounted on the anchor bolt 14 of
A spring 15 is fitted on the anchor bolt 14, and a nut 17 is screwed to compress and tighten the spring 15. <2> A spring formed on the lower end surface and side surface of the joint 8 of the wooden column d. The elongated shaft 9 whose upper and lower ends are opened to the bottom surface of the insertion cavity 9 ′ and the connection shaft are received, and <3> the wooden column d is established and mounted on the top plate 1 of the column support base b, A bolt fitted with a spring 12 is screwed into the bolt hole 7 of the top plate 1 of the column support base b and the bolt receiving hole 10b at the lower end of the connecting shaft, and the spring 12 is compressed between the top plate 1 and the bolt 12. Tighten,
A wooden construction in which a bolt having a spring 12 fitted therein is screwed into the bolt receiving hole 10b at the upper end of the connecting shaft, and the spring 12 is compressed and tightened between the bottom surface of the spring insertion space 9 '. Column base structure in objects.

  In general, the column base structure according to the embodiment of the present invention is configured to connect and hold the wooden column d on the base a by using a column base structural bracket including a column support base b and a connection holding bracket c. To do.

The column support base b is formed by forming a rectangular top plate 1 and a bottom plate 2 and notches 3a, 3a on the left and right sides, and four side plates 3,... It is made of steel that is fixed by welding.
Between the top plate 1 and the bottom plate 2 of the column support base b, there are inserted reinforcing plates 4 and 4 in the shape of a plane cross, which are divided into four compartments 5,. Each of the compartments 5,... Has an opening 3b formed by the notches 3a of the side plates 3,.
,... Are four bolt holes opened at the center of each compartment of the bottom plate 2,..., Four bolt holes opened at the center of each compartment of the top plate 1. It is.

The wooden pillar d has a rectangular cross section of the same size as the top plate 1 and opens at the lower end surface of the joint 8 at a position corresponding to the bolt holes 7. Four elongated holes 9 are formed.
The long holes 9, ..., are formed to have a predetermined diameter that is slightly longer than the length of a lag screw bolt 10 described later, and can be screwed in and received. The upper ends thereof are open to the bottom surfaces of the four spring insertion empty spaces 9 ′ formed on the side surfaces of the wooden pillar d.

  The connection holding metal fittings c,... Are connected to a column connection holding metal fitting c1 for connecting and holding the wooden column d on the column support base b, and a column support base connection holding for connecting and holding the column support base b on the base a. It consists of a metal fitting c2.

The above-mentioned column connection holding metal c1 is formed on the outer peripheral surface of a male screw 10a which is screwed into the long hole 9 of the wooden column d and exerts a pulling strength, and at both ends to transmit the pulling strength to other members. A lag screw bolt (connecting shaft) 10 having a bolt receiving hole 10b having an internal thread formed on the inner surface, bolts 11 and 11 screwed into the bolt receiving holes 10b and 10b, and a pair of thin bowl-shaped dishes It is composed of laminated disc springs 12 and 12 formed by superposing springs, and washers 13.
At both ends of the lag screw bolt 10, screwed portions 10c, 10c having a hexagonal cross section are formed to enable screwing into the wooden pillar d.

  The pillar abutment connecting and holding metal fitting c2 includes anchor bolts 14 fixed to the base a, thin spring-shaped disc springs 15 fitted to the anchor bolts 14, washers 16, ..., ... and nuts 17, ..., ....

  The column base structure is constructed, for example, according to the following procedure, and connects and holds the wooden column d on the base a.

  First, the column support base b is mounted on the base a with the bolt holes 6,... Fitted in the anchor bolts 14,.

Subsequently, the disc springs 15,... And the washers 16,... Are sequentially fitted from the upper ends of the anchor bolts 14,..., And the nuts 17,. The springs 15,... Are compressed and tightened with the bottom plate 2.
Thus, when a large force is applied, the column support base b is connected and held on the base a in a state in which the disc springs 15,.

  On the other hand, the lag screw bolt 10 is not protruded from the upper end of each of the long holes 9,... Into the long holes 9,. In addition, the lower end of the wooden pillar d is screwed so as not to protrude.

  Then, the wooden column d is established and mounted on the top plate 1 of the column support base b, and the long holes 9,. ... the bolt receiving holes 10b at the lower end of the inner lag screw bolt 10 are matched.

The bolts 7, ..., ... and the bolt receiving holes 10b, ..., matched as described above, and the washer 13, ..., and the disc springs 12, ..., are fitted in order. Are screwed together, and the mating disc springs 12,... Are compressed and tightened with the top plate 1.
As a result, when a large force is applied, the wooden column d is connected and held on the column support base b in a state in which the mating disc springs 12,.

  Finally, the springs 9 ′ for inserting the springs of the wooden pillars d into the bolt receiving holes 10b,... Of the lag screw bolts 10 and the countersunk springs 12,. ... Are inserted into the springs through the mating disc springs 12,... By screwing and tightening the bolts 14,. Press contact with the bottom of the empty space 9 '.

  When the column base structure formed as described above is swung by applying a large force due to an earthquake or the like, the disc springs 15,... And the mating disc springs 12,. The swing can be absorbed without applying an excessive force to each member.

  Further, even if an excessive force is applied and the lag screw bolt 10 is displaced and the inner surface of the long holes 9,... Since the bottom disc springs 12,... Are compressed in advance, between the top plate 1 of the column support base b and the bottom surface of the spring insertion space 9 'for the wooden column d. Since the column support base b and the wooden column d are connected and held, the pulling strength is not reduced.

  The above-described mating disc springs 12,..., Are illustrated as examples in which a pair of disc springs having the same diameter are superposed on each other with their concave sides facing each other. You may superpose | polymerize and use it. Further, disc springs having different diameters may be superposed. In addition to a disc spring, a plate spring, a coil spring, or the like can be used.

Further, as the connecting shaft, instead of the lag screw bolt 10, an elongated hole 9 of the wooden pillar d is formed by forming bolt receiving holes at both ends of a round bar (or a square bar) on which the screw is not formed on the outer peripheral surface. It is also possible to screw the bolts fitted with springs at both ends thereof and to compress and tighten the springs.
Alternatively, it is also possible to use a long bolt with male threads formed at both ends as the connecting shaft, project both ends of the bolt, and screw a nut there, and compress and tighten the spring.

It is a permeation | transmission perspective view of the column base structure in the wooden building which concerns on the Example of this invention. It is a longitudinal cross-sectional view same as the above. It is an exploded view same as the above. It is a longitudinal cross-sectional view which shows the state in the middle of screwing a lag screw bolt into the wooden pillar erected in the said column base structure. It is an expansion perspective view of the lag screw bolt.

Explanation of symbols

a base b column support c connection holding metal fitting c1 column connection holding metal fitting c2 column support base connection holding metal fitting d wooden column 1 top plate 2 bottom plate 3 side plate 6 bolt hole 7 bolt hole 8 joint 9 long hole 9 'empty for spring insertion 10a Male thread 10b Bolt receiving hole 11 Bolt 12 Matching disc spring 14 Anchor bolt 15 Disc spring 17 nut

Claims (7)

<1> A top plate (1) having a bolt hole (7), a bottom plate (2) having a bolt hole (6), and a column support (b) comprising side plates (3, ..., ...),
<2> A connecting shaft having bolt receiving holes (10b, 10b) formed at both ends, springs (12, 12), and screwed into the bolt receiving holes (10b, 10b) to compress the springs (12, 12). A column coupling holding bracket (c1) comprising bolts (11, 11) to be tightened, and coupling and holding the wooden column (d) on the column support base (b);
<3> Anchor bolt (14) fixed to the base (a), a spring (15) fitted to the anchor bolt (14), and nuts (17,..., Compression-tightening the spring (15) ... and a column support base connecting bracket (c2) for connecting and holding the column support base (b) on the base (a).   A lag screw bolt (10) in which the connecting shaft forms a male screw (10a) on the outer peripheral surface and can be screwed into the elongated hole (9) of the wooden pillar (d) to be closely fitted. The column base structure metal fitting in the wooden building according to claim 1, wherein <1> A top plate (1) having a bolt hole (7), a bottom plate (2) having a bolt hole (6), and a column support (b) comprising side plates (3, ..., ...),
<2> Consists of a connecting shaft with male threads formed at both ends, a spring, and a nut that is screwed onto the male thread and compresses and tightens the spring, and connects the wooden column (d) onto the column support (b) A column connection holding metal fitting (c1) to hold;
<3> Anchor bolt (14) fixed to the base (a), a spring (15) fitted to the anchor bolt (14), and nuts (17,..., Compression-tightening the spring (15) ... and a column support base connecting bracket (c2) for connecting and holding the column support base (b) on the base (a).   4. The column base structure metal fitting in a wooden building according to claim 1, wherein the spring is a laminated disc spring (12) obtained by superposing two disc springs. <1> A column support (b) comprising a top plate (1) having a bolt hole (7), a bottom plate (2) having a bolt hole (6), and side plates (3, ..., ...), The bolt hole (6) is fitted onto the anchor bolt (14) of the foundation (a) and mounted on the base (a), and a spring (15) is fitted to the anchor bolt (14). Screw the nut (17) to compress and tighten the spring (15),
<2> In the long hole (9) whose upper and lower ends are opened at the lower end surface of the joint (8) of the wooden pillar (d) and the bottom surface of the spring insertion space (9 ′) formed in the side surface. And accept the connecting shaft,
<3> The wooden pillar (d) is established and mounted on the top plate (1) of the column support base (b), and the bolt hole (7) of the top plate (1) of the column support base (b) is connected to the connection. A bolt fitted with a spring (12) is screwed into a bolt receiving hole (10b) at the lower end of the shaft, and the spring (12) is compression-tightened between the top plate (1) and the connecting shaft. A bolt fitted with a spring (12) is screwed into the bolt receiving hole (10b) at the upper end, and the spring (12) is compressed and tightened between the bottom surface of the spring insertion space (9 ′). The column base structure in the wooden building characterized by becoming.   The connecting shaft is a lag screw bolt (10) in which a male screw (10a) is formed on the outer peripheral surface and screwed into a long hole (9) of a wooden pillar (d) and closely fitted. The column base structure in the wooden building of Claim 5. <1> A column support (b) comprising a top plate (1) having a bolt hole (7), a bottom plate (2) having a bolt hole (6), and side plates (3, ..., ...), On the base (a), the bolt hole (6) is fitted and mounted on the anchor bolt (14) of the base (a),
A spring (15) is fitted to the anchor bolt (14), and a nut (17) is screwed together to compress and tighten the spring (15).
<2> In the long hole (9) whose upper and lower ends are opened at the lower end surface of the joint (8) of the wooden pillar (d) and the bottom surface of the spring insertion space (9 ′) formed in the side surface. And accept the connecting shaft,
The wooden pillar (d) is founded and mounted on the top plate (1) of the pillar support (b).
<3> By screwing a nut to the lower end of the connecting shaft, the spring (12) is compression-tightened with the top plate (1), and by screwing the nut to the upper end of the connecting shaft, A column base structure in a wooden building, wherein the spring (12) is compression-tightened between the spring insertion space (9 ') and the bottom surface of the spring insertion space (9').

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