JP2018090963A - Horizontal brace fitting and manufacturing method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a horizontal brace fitting allowing the work with a tool like a spanner or a monkey wrench, when fitting the horizontal brace fitting to a column or a beam using hexagon head bolts, hexagon nuts and coach screw bolts, uniformly manufacturable by pressing, and a manufacturing method thereof.SOLUTION: A horizontal brace fitting 10 has a flat pipe part 12 with a rear surface 11 formed in a flat surface A, and a first and a second fitting parts 15, 16 provided on both sides of the flat pipe part 12 with abutting surfaces 13, 14 formed in flat surfaces B, C. The flat surfaces B, C of the abutting surfaces 13, 14 of the first and the second fitting parts 15, 16 orthogonally cross with each other in their extension lines. All of exposed surfaces 17, 18 of the first and the second fitting parts 15, 16 are flat surfaces D, E, and the flat surfaces B, C formed on the abutting surfaces 13, 14 of the first and the second fitting parts 15, 16 continue to the flat surface A formed on the rear surface 11 of the flat pipe part 12 in folded states, respectively.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fire metal fitting used for firmly connecting a column and a beam in a building, particularly a wooden house, and a manufacturing method thereof.

For example, as shown in Patent Document 1, horizontal frames such as foundations and trunk differences and corner plates of pillars and the like are provided with two side plates on one side of a conventional building. There is an L-shaped metal fitting having a constant angular dimension, and a bracing metal fitting such as a rod-shaped turnbuckle is stretched between the opposing L-shaped metal fittings in an adjustable manner. As described above, as means for attaching the brace fitting such as a turnbuckle to the L-shaped fitting, a hook for turning the buckle is provided on the mounting plate.

However, according to the framework method using the brace fitting such as the conventional turnbuckle shown in the above publication, the hook for locking the turnbuckle is simply provided on the abutting plate. Distortion could not be completely prevented.

In addition, as described in Patent Documents 2 and 3, a fire metal fitting that bends both ends of a pipe material by 45 degrees, forms attachment plate portions at both ends, and connects wooden pillars and beams using screws or the like is proposed. It had been. This is advantageous in that the construction can be performed more easily than the technique described in Patent Document 1 and the manufacturing cost is low.

JP 54-142816 A Japanese Utility Model Publication No. 53-96308 Japanese Patent Laid-Open No. 5-31765

However, in the fire metal fitting described in Patent Document 2 (the same applies to Patent Document 3), ribs are provided on both sides in the width direction of the mounting portion that is bent and provided on both sides of the main pipe. In this case, it is necessary to use a box-type fastener as a tool when fixing this mounting part using a hexagon bolt, hexagon nut or coach screw bolt, and using a tool such as a spanner or monkey, It was difficult to tighten the screw bolt.
Furthermore, the main pipes of conventional fire metal fittings are round pipes and square pipes, and there is a problem that the final shape may be different due to differences in residual stress etc. there were.
In addition, if there are ribs on both sides of the mounting portion, there is a problem in that it may be bulky when a large number of fire metal fittings are stored in a box.

The present invention has been made in view of such circumstances, and when using a hexagon bolt, a hexagon nut, and a coach screw bolt to fix a fire metal fitting to a column or a beam, the work can be performed with a tool such as a spanner or a monkey. An object of the present invention is to provide a fire metal fitting capable of producing a uniform product by a press and a method for producing the same.

The fire metal fitting according to the first aspect of the present invention is provided with a flat tube portion whose back surface is a flat surface A, and provided on both sides of the flat tube portion, and the contact surfaces are flat surfaces B and C. 1 and a second mounting portion, and the flat surfaces B and C of the contact surfaces of the first and second mounting portions are fire metal fittings orthogonal to each other on the extension thereof,
The exposed surfaces of the first and second mounting portions are all flat surfaces D and E, and the flat surfaces B and C formed on the contact surfaces of the first and second mounting portions are Each of the flat surfaces A formed on the back surface of the flat tube portion continues in a bent state.
Here, “continuous in the bent state” means that the flat surfaces B and C formed on the contact surfaces of the first and second mounting portions (including the case where minute wavy irregularities are formed) are the flat tube portions. A state in which the flat surface A formed on the back surface is directly and continuously bent.

In the fire metal fitting according to the first invention, the flat surfaces A, B, and C are provided with a corrugated section having a concave portion with a depth of 0.6 mm or less along the longitudinal direction on the flat surfaces A, B, and C. It is preferable that the bending strength of the second mounting portion is increased.
Moreover, it is preferable that the flat surfaces A, B, and C (D and E, if necessary) are formed with irregularities having a depth of 0.02 to 0.5 mm and a pitch of 10 to 20 mm.

In the fire metal fitting according to the first invention, the length of the flat tube portion is 15 to 20 cm, the length of the first and second attachment portions is 8 to 12 cm, and the width of the first and second attachment portions. Is preferably 3.5 to 5 cm, and the thickness of the first and second mounting portions is preferably 3 to 4 mm. However, the first invention is not limited to this number.
In the fire metal fitting according to the first invention, it is preferable that the front side of the flat tube portion has an arcuate cross section.

In the fire metal fitting according to the first invention, the first mounting portion is provided with one mounting hole P having a diameter of 10 to 15 mm and a plurality of mounting holes Q having a diameter of 4 to 7 mm. It is preferable that a mounting hole R having a diameter of 10 to 15 mm is provided in the mounting portion.

In the fire metal fitting according to the first invention, it is preferable that the flat tube portion and the first and second attachment portions are subjected to corrosion-resistant plating.

And the manufacturing method of the fire metal fitting which concerns on the 2nd invention in alignment with the above-mentioned object is provided in the both sides of the flat tube part which the back surface became flat surface A, and the flat tube part, and the contact surface is flat surface B, A method for manufacturing a fire-fitting metal fitting having first and second attachment portions which are C, and wherein the flat surfaces B and C of the contact surfaces of the first and second attachment portions are orthogonal to each other on its extension. There,
A first step of producing a plated tube by applying corrosion-resistant plating to the inside and outside of a predetermined length of the metal tube;
A second step in which the plated tube is formed into a flat tube having a flat surface on the back surface by first pressing;
A third step in which both ends of the flat tube are made into the first and second attachment portions having flat flat surfaces B to E on the entire front and back surfaces by second pressing;
A fourth step of forming attachment holes in the first and second attachment portions by third pressing or cutting; and
And a fifth step of bending the first and second attachment portions in a fixed direction with respect to the flat tube portion formed at the center thereof.

And in the manufacturing method of the fire metal fitting which concerns on 2nd invention, it is preferable to give the smooth unevenness | corrugation to said flat surface AE by said 1st press work and said 2nd press work.

In the flame metal fitting manufactured according to the flame metal fitting according to the first invention and the flame metal fitting manufacturing method according to the second invention, the entire exposed surface of the first and second mounting portions is a flat surface, The mounting bolt, nut, coach screw bolt, and the like can be tightened with a simple tool such as a spanner or a monkey, thus facilitating the work.
And since there are no ribs on both sides of the first and second mounting parts, and the main pipe part is a flat tube part with a flat back surface, it has excellent packing properties and many in one box Can store the metal flute.

In particular, in the method for manufacturing a fired metal fitting according to the second aspect of the invention, the corrosion resistant plating is applied to the inside and outside of a predetermined length of the metal tube, and then the metal tube is crushed by pressing, so that the plating adhered to the inside of the metal tube Solid phase bonding with layers also occurs and there is no gap between the top and bottom (thus no water intrusion).

It is a side view of the use condition of the fire metal fitting which concerns on the 1st Embodiment of this invention. It is a side view at the time of arrange | positioning the fire metal fitting on a plane. FIG. (A) is the same top view, (B) is a partial top view of the fire metal fitting which concerns on a modification. It is a bottom view of the fire metal fitting which concerns on the 1st Embodiment of this invention. It is process drawing which shows the manufacturing method of the fire metal fitting which concerns on the 2nd Embodiment of this invention. 2A is a sectional view taken along the line AA ′ in FIG. 2, FIG. 2B is a sectional view taken along the line BB ′ in FIG. 2, and FIG. It is explanatory drawing of the volt | bolt and nut which are used for attachment of the fire metal fitting.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIGS. 1 to 5 and FIGS. 7A to 7C, the fire metal fitting 10 according to the first embodiment of the present invention includes a flat tube portion 12 having a back surface 11 that is a flat surface A. The first and second mounting portions are provided on both sides of the flat tube portion 12 and have first and second mounting portions 15 and 16 whose contact surfaces 13 and 14 are flat surfaces B and C, respectively. The flat surfaces B and C of the contact surfaces 13 and 14 of 15 and 16 are orthogonal on the extension. Further, the exposed surfaces 17 and 18 of the first and second mounting portions 15 and 16 are all flat surfaces D and E, so that the first and second mounting portions 15 and 16 have contact surfaces 13 and 14. The formed flat surfaces B and C are continuous with the flat surface A formed on the back surface 11 of the flat tube portion 12 in a state of being bent at 45 degrees via a fold line 19. FIG. 2 is a side view of the state in which the fire metal fitting 10 is disposed on the plane f, and a two-dot chain line indicates the fire metal fitting 10 in use.

In this fire metal fitting 10, the length of the flat tube portion 12 is 15 to 20 cm, the length of the first and second mounting portions 15 and 16 is 8 to 12 cm, and the width of the first and second mounting portions 15 and 16. Is 3.5 to 5 cm, the thickness of the first and second mounting portions 15 and 16 is 3 to 4 mm, and the flat surfaces A to E have a depth of 0 as shown in FIG. The corrugated irregularities 20 having a concave portion 20a in the center of 0.02 to 0.6 mm (within 0.6 mm) and a pitch of 10 to 20 mm are linearly formed in the longitudinal direction. Thereby, the strength of the first and second attachment portions 15 and 16 can be increased.

The first and second mounting portions 15 and 16 are not formed with ribs or the like on the front side (exposed surface side) and the back side (contact surface side), and have a slight uneven surface, but as a whole, they are planar (that is, Flat). As shown in FIGS. 4 and 5, the first attachment portion 15 has one attachment hole P having a diameter of 10 to 15 mm and a plurality of diameters having a diameter of 4 to 7 mm (four in this embodiment). 2, 3 or 5 or more) may be provided, and the second attachment portion 16 may be provided with one (or more) attachment holes R having a diameter of 10 to 15 mm. It has been. The irregularities formed on the flat surfaces A, B, and C are continuous and have substantially the same cross-sectional shape.
In addition, as shown in FIG. 4B, the case where one attachment hole P ′ and eight attachment holes Q ′ are formed in the first and second attachment portions 15 and 16 is shown.

And the corrosion resistance plating (for example, nickel plating, chromium plating, stainless steel alloy plating, galvanization) is carried out to the front and back of the flat tube part 12 and the 1st, 2nd attachment parts 15 and 16 of this metal fitting 10, and its inside. , Anodized, etc.) to ensure corrosion resistance.
In addition, these plating can also be performed after all the processes are completed.

Then, the manufacturing method of the fire metal fitting which concerns on the 2nd Embodiment of this invention is demonstrated, referring FIG.
First, a steel metal pipe having an outer diameter of about 23 to 28 mm, a thickness of 1.8 to 2.5 mm, and a predetermined length (for example, 35 to 40 cm) (for example, S20C to S35C, high-tensile steel, stainless steel). Steel pipe etc.) is prepared, and corrosion-resistant plating is performed on the inside and outside to form a plated pipe 22 (however, it is not necessary in the case of a stainless steel pipe). The thickness of the plating may usually be about 50 to 300 μm (the first step). The inside of the steel metal tube may be coated with a corrosion resistant paint instead of plating.

Next, the plated tube 22 is formed into a flat tube 24 having a flat surface A ′ on the back surface (bottom surface) by the first press working. In this case, the back surface of the flat tube 24 is flat, and the front side is circular in cross section. In this way, the front side of the flat tube 24 is inflated to prevent buckling or bending of the portion (the second step).

Both ends of the flat tube 24 are formed into first and second attachment portions 15 and 16 having flat flat surfaces B to E on the entire front and back surfaces by the second press working (the third step).
One attachment hole 25 (attachment hole P) and four attachment holes 26 (attachment hole Q) are provided in the first attachment portion 15 and one attachment is provided in the second attachment portion 16 by the third pressing or cutting. The holes 27 (mounting holes R) are respectively formed (the fourth step).
The first and second attachment portions 15 and 16 are bent at an angle of 45 degrees in a fixed direction with respect to the flat tube portion 12 formed at the center thereof (the fifth step).
As a result, the fire metal fitting 10 is completed, but the plating process may be performed in the last step without being performed in the first step.

In addition, smooth unevenness | corrugation processing can also be given to flat surface AE by the 1st press work and 2nd press work of a 2nd process and a 3rd process. About this uneven | corrugated process, as mentioned above, it is good to make it a cross-sectional wave shape in a longitudinal direction.
Further, when the manufactured metal fitting 10 is fixed to a pillar and a beam, the hexagon bolt 30, the nut 31 and the washer 32 shown in FIG. Further, the wood screw 33 is inserted into the attachment hole Q and attached to the pillar. And the coach screw bolt 34 is inserted in the attachment hole R of the 2nd attachment part 16, and the 2nd attachment part 16 is fixed to a beam, for example using tools, such as a spanner and a monkey.

The present invention has been described above with reference to the embodiments. However, the present invention is not limited to the contents described in the above embodiments, and is within the scope of the matters described in the claims. Other embodiments and modifications which can be considered in the above are also included.

10: Fire metal fitting, 11: Back surface, 12: Flat tube portion, 13, 14: Contact surface, 15: First attachment portion, 16: Second attachment portion, 17, 18: Exposed surface, 19: Bending line 20: Concavity and convexity, 20a: Concavity, 22: Plated tube, 24: Flat tube, 25-27: Mounting hole, 30: Hex bolt, 31: Nut, 32: Washer, 33: Wood screw, 34: Coach screw bolt

Claims (8)

A flat tube portion whose back surface is a flat surface A; and first and second attachment portions which are provided on both sides of the flat tube portion and whose contact surfaces are flat surfaces B and C. 1, the flat surface B, C of the contact surface of the second mounting portion is a fire metal fitting that is orthogonal on its extension,
The exposed surfaces of the first and second mounting portions are all flat surfaces D and E, and the flat surfaces B and C formed on the contact surfaces of the first and second mounting portions are A fire metal fitting that is continuous with the flat surface A formed on the back surface of the flat tube portion in a bent state. 2. The fired metal fitting according to claim 1, wherein the flat surfaces A, B, and C are provided with a corrugated cross-section with a concave portion having a depth of 0.6 mm or less along the longitudinal direction, the first, A fire metal fitting characterized in that the bending strength of the second mounting portion is increased. 3. The fired fitting according to claim 1, wherein the flat tube portion has a length of 15 to 20 cm, the first and second attachment portions have a length of 8 to 12 cm, and the first and second attachment portions have a length of 15 to 20 cm. A fire metal fitting having a width of 3.5 to 5 cm and a thickness of the first and second mounting portions of 3 to 4 mm. The fire metal fitting according to any one of claims 1 to 3, wherein a front side of the flat tube portion has an arcuate cross section. 5. The fire metal fitting according to claim 1, wherein the first attachment portion is provided with one attachment hole P having a diameter of 10 to 15 mm and a plurality of attachment holes Q having a diameter of 4 to 7 mm. The second mounting part is provided with a mounting hole R having a diameter of 10 to 15 mm. The fire metal fitting according to any one of claims 1 to 5, wherein the flat tube portion and the first and second attachment portions are subjected to corrosion resistance plating. A flat tube portion whose back surface is a flat surface A; and first and second attachment portions which are provided on both sides of the flat tube portion and whose contact surfaces are flat surfaces B and C. 1. The method of manufacturing a fire metal fitting in which the flat surfaces B and C of the contact surface of the second mounting portion are orthogonal on the extension,
A first step of producing a plated tube by applying corrosion-resistant plating to the inside and outside of a predetermined length of the metal tube;
A second step in which the plated tube is formed into a flat tube having a flat surface on the back surface by first pressing;
A third step in which both ends of the flat tube are made into the first and second attachment portions having flat flat surfaces B to E on the entire front and back surfaces by second pressing;
A fourth step of forming attachment holes in the first and second attachment portions by third pressing or cutting; and
And a fifth step of bending the first and second attachment portions in a fixed direction with respect to the flat tube portion formed at the center thereof. 8. The method of manufacturing a fire metal fitting according to claim 7, wherein smooth unevenness is applied to the flat surfaces A to E by the first press process and the second press process. .

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