JP2935024B1 - Connecting device for pipe columns in wooden buildings - Google Patents

Abstract

Abstract: [Object] To provide a connecting fitting for a pipe column in a wooden building. A connecting member for connecting a tubular column and a horizontal member integrally includes a leg inserted into an insertion hole of the horizontal member and a head inserted into a slit of the tubular column, and a shaft of the horizontal member. The leg portion is fixed to the insertion hole via a shaft means inserted into the hole, and the head is fixed to the slit via the shaft means inserted into the shaft hole of the tube column.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wooden building, in which a pipe is provided between a lower horizontal member such as a base or a beam and an upper horizontal member arranged in parallel above the lower horizontal member. The present invention relates to a device that is interposed and connected via a connection fitting.

[0002]

2. Description of the Related Art Conventionally, in a wooden building, as shown in FIG. 9, a through column 3 is erected on a base 2, and a pair of through columns 3, 3 is provided.
Between them, a beam 6 parallel to the base 2 is erected. A tube post 8 is interposed and mounted between the base 2 and the beam 6 above the base 2 and between the beams 6 and 6 positioned above and below each other.

Generally, a mortise 7 is provided in the base 2 and the beam 6.
A mortise 71 is formed at the opening end of the tube post 8, and the mortise 71 is fitted into the mortise 70 to attach the tube post 8.

[0004]

A mortise 7 as described above.
Attachment of the tube post 8 by fitting the tenon and the tenon 71 must be performed simultaneously with the erection work when the beam 6 is erected on the through columns 3, 3. In other words, after the erection of the beam 6 is completed, the distance between the base 2 and the beam 6 above the base 2 and the distance between the beams 6 and 6 located above and below each other are determined by the respective pipe columns 8.
Since the length is shorter than the length including the tenons 71, 71, the tube column 8 cannot be interposed.

Further, in recent years, the earthquake-resistant structure of a wooden building has been reviewed based on the lesson of collapse of a house due to the earthquake, but the fitting structure of the mortise 70 and the tenon 71 as described above has caused There is a problem that the tenon 71 easily comes off the mortise hole 70 due to the impact, and the pipe column 8 comes off.

[0006]

Means for Solving the Problems The present invention solves the above-mentioned problems, and in a wooden building, it is possible to attach a pipe column even after completing the erection of beams, thereby facilitating construction work. It is intended to provide a pipe column connecting device which is excellent also in terms of a seismic structure, and as a first means, a lower horizontal member such as a foundation or a beam in a wooden building, and a lower horizontal member. In a device for interposing a tube post and connecting it through a connection fitting between an upper lateral member arranged in parallel above the member, a slit extending in the axial direction from the opening end of the tube post is formed, and the pipe is formed. A shaft hole that crosses the slit is formed in the vicinity of the open end of the pillar, while an insertion hole is formed in the mounting surface of the tubular column in the horizontal member, and a shaft hole that crosses the insertion hole is formed in the horizontal member. A connection for connecting the tubular column and the horizontal member. The fitting is integrally provided with a leg inserted into the insertion hole of the horizontal member and a head inserted into the slit of the tube post, and projects laterally beyond the diameter of the leg at the head.
Equipped with ears, opening a hole in the head that communicates with the shaft hole of the tube column
Mounting holes communicating with the shaft holes of the lateral members
And insert the leg of the connection bracket into the insertion hole of the horizontal member.
The ears of the head into contact with the surface of the horizontal member
As a result, the mounting hole on the leg and the shaft hole on the
In-decided tanning condition, with securing the legs to the insertion hole through the shaft means to be inserted into the axial hole of the transverse member, tubular column Suri
In the state where the head of the connection fitting is inserted into the socket, the head is fixed to the slit via shaft means inserted into the shaft hole of the tube post. In addition, the present invention is used as a second means.
Place that we constituted such as foundation or beam in wooden building
A lower horizontal member, and an upper parallel member disposed above the lower horizontal member.
A tube post is interposed between the side members and connected via a connection fitting.
Device that extends axially from the mouth of the tube column
A lit is formed, and the above-mentioned pipe column
An axial hole is formed across the slit, while the transverse member
In addition to forming an insertion hole in the mounting surface of the
Forming a shaft hole crossing the insertion hole, the shaft hole of the tube column
Position the axis and the axis of the shaft hole of the cross member at right angles to each other.
And a connecting fitting for connecting the tubular column and the horizontal member is formed by a horizontal portion.
A columnar leg inserted into the insertion hole of the material, and a shaft end of the leg
A plate-like plate that is arranged in the diameter direction and inserted into the slit of the tube column
A head is integrally provided, and the diameter of the leg is added to the plate-shaped head.
With ears that project laterally beyond
Open a hole communicating with the hole, and add
Opening holes that communicate with the shaft holes are provided.
Into the insertion hole of the horizontal member and the ear of the head
Abutting against the surface of the leg to secure the mounting holes and
With the shaft hole of the horizontal member positioned in the communicating state,
The leg is fixed to the insertion hole via the shaft means inserted into the shaft hole.
And insert the head of the connection fitting into the slit of the tube post.
In the state of being inserted, through a shaft means inserted into the shaft hole of the tube column.
The head is fixed to the slit.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a connecting structure of components in a wooden building in which the present invention is implemented.
When mounting the base 1 on the foundation 1 (not shown in FIG. 1) and erecting the through column 3, the first connection fitting 5 using the anchor bolt 4 implanted on the foundation is used. You. When attaching the beam 6 to the through column 3, the second connection metal fitting 7 is used. Furthermore, base 1 and beam 6
A third connecting fitting 9 is used to attach a pipe column 8 that vertically connects between the upper and lower beams 6 and 6.

(First Connecting Metal) The first connecting metal 5 is shown in FIG.
A first connecting metal fitting 5a for a straight part as shown in FIG. 2A and a first connecting metal fitting 5b for a corner part as shown in FIG. 2B.
It consists of two types.

The first connecting metal fitting 5a for the straight portion is formed by connecting a substantially rectangular bottom plate 10 and a standing plate 11 each made of a metal plate such as an iron plate into a T shape by welding or the like. The left and right extensions 10a and 10a are configured. In each of the extension portions 10a, thick block pieces 12 are fixed to both end corners of the extension end by welding or the like, and a hole 13 is formed in the extension portion 10a between the pair of block pieces 12, 12. ing. In addition, the upright plate 11 has a pair of holes 14, 14 spaced apart in the width direction.

The base 1 has a pair of holes 1 in the bottom plate 10.
Anchor bolts 4, 4 are planted corresponding to 3, 13, respectively. Therefore, as shown in FIG.
4 is inserted through the holes 13 and 13 so that the bottom plate 10
Is mounted on the foundation 1 and, in this state, the bottom plate 10 is fixed from above the bottom plate 10 by the nuts 15 and 15 fastened to the anchor bolts 4 and 4. Note that the nut 15 is a block piece 1
It is put between 2 and 12.

The through column 3 has a slit 16 extending in the axial direction from the tip end of the lower end, and a pair of mounting holes 17, 17 that cross the slit 16 and pass through the through column 3. Then, by inserting the upright plate 11 of the first connection fitting 5 a into the slit 16, the through column 3 is raised on the bottom plate 10. In this state, since the mounting hole 17 and the hole 14 communicate with each other in the slit 16, the bolts 18 with nuts 18 are inserted and tightened to fix the through column 3 and the upright plate 11. The mounting hole 17
Is provided with a large-diameter portion 17a by spotting an opening edge, and a nut 18a is accommodated in the large-diameter portion 17a.

The base 2 is provided with an upper protruding portion 20 by forming a cutout portion 19 in which a part of the lower side is cut off from the edge of the wood, and a mounting hole 21 is formed through the upper protruding portion 20 in a vertical direction. ing. Therefore, when mounting the base 2 along the foundation 1, the anchor bolts 4 that stand out from the bottom plate 10 of the first connection fitting 5 a are inserted into the mounting holes 21, and are inserted into the ends of the anchor bolts 4. By tightening the nut 22, the base 2 is connected to the base 1 via the first connection fitting 5a.
Stick to At this time, the notch 19 is connected to the one extension 10a.
Of the upper projection 20 closes the large diameter portion 17a of the mounting hole 17 in the through column 3. The mounting hole 21 is provided with a large-diameter portion 21a by spotting an opening edge, and a nut 22 is accommodated in the large-diameter portion 21a.

A first connecting metal fitting 5b for a corner portion shown in FIG. 2B has a pair of extended portions 10a formed by forming the bottom plate 10 into an L shape in plan view so as to correspond to the corner portion 1a of the base 1. Except that 10a is extended to L shape,
Since it is the same as the first connection fitting 5a for the straight portion, the above description is referred to, and the same components are denoted by the same reference numerals.

(Second Connection) The second connection 7 is shown in FIG.
As shown in (A), the substrate unit 30 arranged in the vertical direction
A bracket portion 31 protruding from the lower end portion of the board portion 30 in a substantially L-shape; and a wing piece portion 32 arranged along the center line of the board portion 30 and the bracket portion 31 and connecting the both. In addition to opening the holes 33, 33 on the pillar side in the substrate part 30, opening the holes 34, 34 on the beam side in the wing piece part 32, and further cutting the wing piece part 32 downward from the upper edge. A receiving groove 35 extending in a shape is formed.

As shown in FIG. 1, the through column 3 forms a counterbore 36 for fitting the substrate portion 30 therein, and the holes 33, 33 on the column side are formed inside the counterbore 36.
Mounting holes 37, 37 corresponding to. That is, the mounting hole 37 penetrates the through column 3 in the transverse direction. In addition, beam 6
Is a slit 38 for allowing the wing piece 32 to be inserted.
Is formed in a notch shape in the axial direction from the opening face, and the slit 3
8 and through holes 39, 39 corresponding to the holes 34, 34 on the beam side. That is, the mounting hole 39 penetrates in the thickness direction of the beam 6. Further, the beam 6 has a wing piece portion 32.
A pin 40 fitted in the receiving groove 35 is provided to cross the slit 38. In addition, on the front end of the beam 6, there is formed a front end concave portion 41 which is recessed leaving only both side edges, and a lower surface concave portion 42 which is continuous from the lower end of the concave portion 41 to the lower surface of the beam 6.

Therefore, when attaching the beam 6 to the through column 3, as shown in FIG.
With the bolts 43, 43 inserted through the second connecting fitting 7
Of the board part 30 into the counterbore hole 36 and the bolt 4
3 and 43 are inserted into the holes 33 and 33 on the column side, and nuts 44 and 44 are fastened. As a result, the second connection fitting 7 is fixed to the through column 3 through the substrate portion 30, and the bracket portion 31 and the wing piece portion 32 are made to protrude from the through column 3.
Subsequently, when the slit 38 of the beam 6 is inserted into the wing portion 32, the pin 40 is fitted and locked in the receiving groove 35, and the bracket portion 31 is fitted in the lower surface concave portion 42.
In this state, the mounting holes 39, 39 of the beam 6 and the holes 34, 34 on the beam side of the wing piece part 32 communicate with each other.
(B)) is inserted, and a nut (not shown) is fastened to fix the beam 6 and the second connection fitting 7. In addition, as shown in FIG. 1, it is preferable that the mounting hole 39 is provided with a large-diameter portion by counterboring an opening edge, and the nut 22 is housed in the large-diameter portion.

As shown in FIG. 6C, a pair of mounting holes 39, 39 provided in the beam 6 and a pair of beam side holes 34, 34 provided in the wing piece 32 are provided with bolts 45 (or pins). ) Is preferably configured so that a wedge effect can be expected when the sword is inserted. Such a wedge action causes the distance L1 between the centers of the pair of mounting holes 39, 39 in the beam 6 and the distance L2 between the centers of the pair of beam-side holes 34, 34 in the wing piece portion 32 to each other. It becomes possible by making different. For example, if L1> L2 is formed, as shown in FIG. 6D, a wedge force F1 that presses a pair of mounting holes 39, 39 of the beam 6 inward by the driven bolt 45 or pin is possible. become. On the other hand, if L1 <L2 is formed, FIG.
As shown in (E), the driven bolt 45 or pin enables a wedge force F2 for pressing a pair of the mounting holes 39 of the beam 6 outward.

The second connection metal fitting 7 is formed by connecting a substrate portion 30 and a bracket portion 31 to a single metal plate (iron plate, steel plate, etc.).
It is formed by bending into a shape. For example, FIG.
As shown in (A), a single metal plate is punched out to form a plate-shaped metal member material 7a integrally including the board portion 30 and the bracket portion 31 in a series. In the state of the metal fitting material 7 a, pillar-side holes 33, 33 are formed in the board part 30, and metal fitting material located at a boundary portion (bent part 49 to be bent) between the board part 30 and the bracket part 31. Substantially W-shaped notches 46, 46 are formed on both side edges of 7a. That is, the notch 46 has a projection 47 at the center thereof.
V-shaped grooves 48a and 48b are formed on both sides of the. Also, the bracket portion 31 located between the pair of cutout portions 46, 46 is provided.
An opening 50 is formed in the portion facing the bent portion 49. The opening 50 has an oval shape extending long in the width direction of the metal fitting material 7a, and defines a pair of straight opening edges 50a and 50b facing each other.
a on the side of the substrate section 30 and the other linear opening edge 5
0b faces the bracket portion 31 side.

When bending the metal fitting material 7a into an approximately L-shape, the bending curve BN is defined by a line connecting the V-grooves 48a, 48a of the pair of cutouts 46, 46 facing the substrate 30 side. . Then, a straight opening edge 50a facing the substrate section 30 side of the pair of straight opening edges of the opening hole 50 coincides with or is close to the folding curve BN. For this reason, when the metal fitting material 7a is bent along the bending curve BN, as shown in FIG. 4 (B), the opening 50 is deformed and the linear opening edge 50a is formed by bending the bent portion 49. To follow and follow a downward shift. In a state of being bent substantially in an L-shape, a downward linear opening edge 50a is formed.
Are positioned substantially flush with the bottom surface of the bracket portion 31 and constitute a locking portion 51 as described later. In addition, as a result of bending the metal plate, R-shaped surfaces are formed in the bent portions 49 located on both sides of the locking portion 51.

Further, a tongue piece 52 extends from the free end of the substrate portion 30, and the tongue piece 52 is bent so as to project toward the space above the bracket portion 31. After such a bending step is completed, the wing pieces 32 are fixed by welding W, and the second connection fitting 7 as shown in FIG. 5A is completed.
The wing piece portion 32 is provided with a notch 53 for a spanner so as not to interfere with the holes 33 on the column side.

According to the second connecting member 7 having the above-described configuration, when the board portion 30 is fitted into the counterbore hole 36 of the through post 3 as described above, as shown in FIG. Is supported on the lower edge 36 a of the counterbore 36.

(Embodiment of Third Connecting Bracket Corresponding to Claims) As shown in FIGS. 1, 7 and 8, the third connecting bracket 9 is disposed at the axial end of a columnar leg 61 in the diametrical direction. A plate-shaped head 62 is fixedly attached, a column-side hole 63 is opened in the plate-shaped head 62, and a mounting hole 64 is opened in the leg 61, and the axial lines of both holes 63, 64 are formed. Are arranged orthogonally. Note that the plate-shaped head 62 has a long plate width dimension exceeding the diameter of the leg 61, and the lower edges on both sides of the head 62 constitute ears 62a, 62a.

The tubular column 8 is provided between the base 2 (lower horizontal member) and the beam 6 (upper horizontal member) above the lower column 6 (lower horizontal member) and the upper lower beam 6 (lower horizontal member). Each is interposed between the beam 6 (upper side member) and attached and fixed by the third connection fitting 9. For this reason, the base 2 and the beam 6 are each provided with a blind hole-shaped insertion hole 65 that is recessed from the surface of the mounting surface of the tube column 8.
Is formed, and a shaft hole 66 crossing the insertion hole 65 is formed.
Are formed. On the other hand, the tube post 8 is formed with a slit 67 that extends in the axial direction from the cut end surfaces of both ends, and a shaft hole 68 that crosses the slit 67 and penetrates the tube post 8.

In order to mount the pipe post 8, first, the leg 61 of the third connection fitting 9 is inserted into the insertion hole 65 of the base 2 or the beam 6. In this state, the ears 62 of the head 62
a, 62a contact the surface of the base 2 or the beam 6,
And the mounting hole 64 are positioned so as to communicate with each other.
The shaft means 69 such as a pin is driven so as to penetrate the base 6 and 64, and the third connection fitting 9 is fixed to each of the base 2 and the beam 6.

With the third connecting fittings 9 fixed to the lower horizontal member such as the base 2 and the upper horizontal member such as the beam 6,
The tube post 8 is interposed between the lower horizontal member and the upper horizontal member.
The tube post 8 is interposed between the lower horizontal member and the upper horizontal member by inserting the heads 62 of the upper and lower third connection fittings 9 into the slits 67 at both ends. In this state, since the shaft hole 68 and the hole 63 on the column side communicate with each other in the slit 67, the tube column 8 is fixed to the head 62 by driving the shaft means 70 such as a pin.

In the embodiment shown in FIG. 7, slits 67, 67 are provided in the cut ends of the upper and lower ends of the tube post 8, and both ends of the tube post 8 are respectively connected to the lower horizontal member by a pair of third connecting fittings 9, 9. And a structure in which it is attached and fixed to the upper horizontal member.
May be implemented only at one end, and the other end may have a mortise and tenon connection structure as in the conventional example shown in FIG.

As shown in FIG. 8A, the third connecting fitting 9 has a leg 61 formed by a metal cylindrical tube such as iron or steel, and the leg 61 is formed of a metal plate such as iron or steel. Head 62
Is welded. In this case, the insertion hole 65 formed in the base 2 or the beam 6 forms a round hole that fits the cylindrical leg 61.

Alternatively, the third connecting fitting 9 is formed of a metal square pipe such as iron or steel as shown in FIG.
And a head 62 made of a metal plate such as iron or steel is welded to the leg 61. In this case, the insertion hole 65 formed in the base 2 or the beam 6 forms a square hole that fits the square leg 61.

The shaft means 69, 70 may be constituted by tightening shaft means consisting of bolts with nuts.
It is preferable to use a driving pin as shown in FIG. In this case, the pins (shaft means 69, 70) constitute a tapered pin having a tapered portion 71 at the tip, and
An uneven portion 72 such as a knurl is formed on the surface. Therefore, it is easy to drive the pins (shaft means 69, 70),
In addition, after the driving, the concave and convex portions 72 are engaged with the base 2 or the beam 6 and the woody portion of the tube post 8 to be locked and firmly fixed.

According to the configuration of the third connection fitting 9, the leg 61 is inserted into the insertion hole 65 of the base 2 or the beam 6 and the head 62 is inserted into the slit 67 of the tube 8. The third connecting fitting 9 is completely embedded in the structure of the wooden building, is not exposed to the outside, and if the shaft means 69 and 70 are constituted by pins as described above, the shaft means is also Does not protrude outside. The base 2 and the beam 6 as well as the pipe column 8 as well as the third connection fitting 9 can be mass-produced by factory production, and the insertion hole 65 and the shaft hole for the base 2 and the beam 6 at the time of production. There is an advantage that a predetermined wooden building can be constructed as designed only by mechanically forming the 66 and forming the slit 67 and the shaft hole 68 with respect to the pipe column 8 mechanically.

[0031]

According to the present invention, in a wooden building, after the installation of the base 2 and the erection of the beam 6 are completed, the pipe column 8
The construction work is greatly facilitated because it is possible to mount the light source. In particular, when installing the pipe column 8, the base 2 or the beam 6
With the leg 61 of the connection fitting 9 inserted into the insertion hole 65,
The ears 62a, 62a of the head 62 are the surface of the base 2 or the beam 6.
And the shaft hole 66 and the mounting hole 64 are positioned in communication.
So that the shaft of a pin or the like passes through both holes 66 and 64
Driving means 69 and connecting to base 2 or beam 6 respectively
The metal fitting 9 can be fixed. Moreover, as described in claim 2
In addition, the leg portion 61 of the connection fitting 9 is formed in a column shape,
The part 62 is formed in a plate shape, and the shaft hole 68 of the pipe post 8 and the base 2 or
The axial hole 66 of the beam 6 is configured so that the axes are orthogonal to each other.
Thereby, the mounting strength of the pipe column 8 is high, and it is excellent also in the point of the earthquake-resistant structure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a structural member in a wooden building in which a connecting device according to one embodiment of the present invention is implemented.

FIG. 2 shows a first connection fitting used in combination with the connection device of the present invention, wherein (A) is a perspective view showing an example of use of the first connection fitting for a straight portion, and (B) is a corner. It is a perspective view which shows the example of use of the 1st connection metal fitting for parts.

FIG. 3 is a longitudinal sectional view showing an attached state of a first connection fitting.

4A and 4B show a second connection fitting used in combination with the connection device of the present invention, and FIG. 4A is a perspective view showing a fitting material;
(B) is a perspective view showing a state where the metal fitting material is bent substantially in an L shape.

FIGS. 5A and 5B show a second connecting fitting, wherein FIG. 5A is a perspective view showing a completed second connecting fitting, and FIG. 5B is a longitudinal sectional view showing an attached state of the second connecting fitting.

6A and 6B are exploded perspective views showing a state before the second connecting fitting is attached, and FIG. 6B is a longitudinal sectional view showing an attached state of the second connecting fitting, showing the second connecting fitting. , (C) is an explanatory view showing the positional relationship between the hole of the fitting and the mounting hole, (D) is an explanatory view showing a first example of the positional relationship between the bolt inserted into the hole of the fitting and the mounting hole, and (E) is It is explanatory drawing which shows the 2nd example of the positional relationship of the bolt inserted in the hole of a metal fitting, and a mounting hole.

FIG. 7 is an exploded perspective view showing a connection device (third connection fitting) according to one embodiment of the present invention, showing a base, a beam, a pipe column, and a third connection fitting.

8A and 8B show a connecting device (third connecting metal) according to one embodiment of the present invention, wherein FIG. 8A is a perspective view showing a first example of the third connecting metal, and FIG. 8B is a third connecting metal. (C) is a longitudinal sectional view showing a mounted state.

FIG. 9 is an explanatory view showing an attached state of a pipe column in a conventional wooden building.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation 2 Base 3 Through pillar 4 Anchor bolt 5 First connection fitting 6 Beam 7 Second connection fitting 7a Metal fitting 8 Tube pillar 9 Third connection fitting (metal fitting of the present invention) 61 Leg part 62 Head part 62a Ear part 63 Column side Hole 64 Mounting hole 65 Insertion hole 66 Shaft hole 67 Slit 68 Shaft hole 69, 70 Shaft means 71 Tapered portion 72 Uneven portion

Claims (2)

(57) [Claims] 1. A tubular column interposed between a lower horizontal member such as a base or a beam of a wooden building and an upper horizontal member arranged in parallel above the lower horizontal member, and a connecting bracket is provided therebetween. In the apparatus for connecting the pipe column, a slit extending in the axial direction from the mouth of the pipe column is formed, and a shaft hole passing through the slit is formed in the vicinity of the mouth end of the pipe column. An insertion hole is formed in the mounting surface, and a shaft hole is formed in the lateral member so as to cross the insertion hole. A connection fitting for connecting the tube post and the lateral member is inserted into the insertion hole of the lateral member. A leg and a head inserted into a slit of a tube column are integrally provided, and the head has a side extending beyond the diameter of the leg.
With ears that protrude toward the head, and the head communicates with the axial hole of the tube post
Along with the shaft hole of the horizontal member,
The connecting hole is formed by inserting the leg of the connecting bracket into the insertion hole of the horizontal member and the head
Of the legs by contacting the ears of the
A state where the mounting hole and the shaft hole of the horizontal member are positioned in communication.
In this state, the leg is fixed to the insertion hole via the shaft means inserted into the shaft hole of the horizontal member, and the head of the connecting fitting is inserted into the slit of the tube post.
And a head portion fixed to the slit via a shaft means inserted into a shaft hole of the tube column. 2. A tubular column is interposed between a lower horizontal member such as a base or a beam in a wooden building and an upper horizontal member arranged in parallel above the lower horizontal member, and a connecting metal fitting is provided. In the apparatus for connecting the pipe column, a slit extending in the axial direction from the mouth of the pipe column is formed, and a shaft hole passing through the slit is formed in the vicinity of the mouth end of the pipe column. An insertion hole is formed in the mounting surface, and a shaft hole is formed in the lateral member so as to cross the insertion hole.
The connecting bracket for connecting the tubular column and the horizontal member has a columnar leg inserted into an insertion hole of the horizontal member, and a diametrical direction at an axial end of the leg.
Integrally includes a plate-shaped head which is inserted into the slit of the deployed tube column to the side beyond the diameter of the legs to the plate-shaped head
With ears that protrude toward the head, and the head communicates with the axial hole of the tube post
Along with the shaft hole of the horizontal member,
The connecting hole is formed by inserting the leg of the connecting bracket into the insertion hole of the horizontal member and the head
Of the legs by contacting the ears of the
A state where the mounting hole and the shaft hole of the horizontal member are positioned in communication.
In this state, the leg is fixed to the insertion hole via the shaft means inserted into the shaft hole of the horizontal member, and the head of the connecting fitting is inserted into the slit of the tube post.
And a head portion fixed to the slit via a shaft means inserted into a shaft hole of the tube column.