JPH072279B2 - How to connect steel columns - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting steel columns for vertically connecting steel columns for construction or construction.

[0002]

2. Description of the Related Art Usually, in order to connect steel columns in construction or construction, for example, a set of U-shaped backing metal fittings for welding is inserted from the opening of a hollow rectangular steel column, and a fixed distance welding is performed. After positioning by spot welding with the end of the backing metal fitting protruding, the steel column and the welding backing metal fitting are welded, and the diaphragm is placed on the upper surface of the welding backing metal fitting and the steel is attached. A method of connecting steel columns vertically by welding the columns and the diaphragm is used. Then, as a conventional method of temporarily fixing the welding backing metal fitting to the steel column, the welding backing metal fitting is manually positioned so that the end portion of the welding backing metal part protrudes from the opening end of the steel column by a certain amount. The backing metal fittings for welding are temporarily fixed by using force to stop and fix at several places and spot welding.

[0003]

However, according to the conventional method, the end of the backing metal for welding is projected by a certain distance from the open end of the steel column while measuring with a ruler held in one hand and the other hand. After positioning as described above, it is necessary to change the ruler etc. held in one hand to the shrimp vise and fix it with the shrimp vise with only one hand, so it is very troublesome and one person alone In some cases, it cannot be performed, and at that time, there is a problem that it is very difficult to make the distance at which the end of the welding backing metal piece protrudes constant.

Therefore, according to the present invention, by using a temporary stopper for the welding backing metal fitting, the end portion of the welding backing metal fitting is held in a state in which it is always protruded from the open end of the steel column by a certain distance. Therefore, it is an object of the present invention to provide a method for connecting steel columns, in which the steel columns can be easily connected vertically.

[0005]

In order to achieve the above object, a method of connecting steel columns according to the present invention is a backing metal fitting for welding which can abut against an inner surface of a hollow steel column, and an opening end of the steel column. A step of attaching a plurality of temporary backing metal fittings for welding having locking pieces that can be locked; inserting the backing metal fittings for welding from the opening of the steel column, and temporarily fixing the opening end of the steel column The step of holding the upper end of the welding backing metal fitting by projecting a certain distance by locking the locking piece; and in this state, temporarily fixing the welding backing metal fitting to the steel column by spot welding, etc. And a step of connecting the steel columns by welding the clearance between the steel columns and the diaphragm, without removing or removing the temporary fastener attached to the backing metal for welding Is the way.

Further, in order to achieve the above-mentioned object, as a temporary stopper for the welding backing metal fitting, the lower end of the welding backing metal fitting can be sandwiched between one end of the abutting piece and the corresponding contacting piece. A substantially L-shaped support piece having a support portion and a holding portion is extended substantially vertically, and a locking piece that can be locked to the tip of the steel column is extended from the other end of the contact piece in the direction opposite to the support piece. It is preferable to weld the gap between the steel column and the diaphragm without removing the temporary fasteners attached to the welding backing metal fittings. It is particularly preferable to fold it into

Further, due to the effects described later, as a temporary stopper for the backing metal fitting for welding, the holding piece is spaced in parallel from the surface of the abutting piece so that the upper and lower surfaces of the backing metal for welding can be held in parallel. Then, the extension piece is extended downward from the upper end of the clamping piece so that both side surfaces of the welding backing metal can be clamped by the abutting piece, and the extension piece is extended outward from the end of the extending piece. It is preferable to use a method in which a locking piece is extended, and after removing the temporary fastener attached to the welding backing metal fitting, welding the gap between the steel column and the diaphragm. To make the handle part project diagonally downward from the lower part of the back,
Particularly preferred.

[0008]

According to the method for connecting steel columns of the present invention as described above,
To the backing metal fitting for welding that can abut the inner surface of the hollow steel column, attach multiple temporary fasteners of the backing metal fitting for welding that have locking pieces that can be locked at the open end of the steel pillar, The backing metal fitting for welding is inserted from the portion, and the upper end of the backing metal fitting for welding is held in a state of protruding for a certain distance by locking the locking piece of the temporary stopper to the opening end of the steel column, In this state, temporarily attach the backing metal fitting for welding to the steel pillar by spot welding,
Without removing or removing the temporary fastener attached to the welding backing metal fitting, the diaphragm can be positioned on this and the steel pillar can be connected by welding the gap between the steel pillar and the diaphragm. Similarly, the steel columns can be connected vertically.

As a temporary stopper, a substantially L-shaped support piece having a support portion and a holding portion so that the lower end portion of the backing metal for welding can be held between one end of the contact piece and the contact piece is substantially vertical. Of the abutting piece, and a locking piece that can be locked at the tip of the steel column in the opposite direction to the supporting piece from the other end of the abutting piece. It is preferable to use the one in which the gap between the steel column and the diaphragm is welded without removing the stopper, and in addition to the case where the holding part of the support piece is bent inward in a V shape. , The state where the lower end of the welding backing metal fitting is sandwiched between the abutting piece of the temporary fastener and the nipping portion of the nipping piece that is bent inward in a U-shape, so that the welding backing metal fitting is in close contact. You can attach a temporary stopper with.

Further, as a temporary fixing tool, a sandwiching piece is arranged in parallel with the upper surface and the lower surface of the welding backing metal fitting so as to be able to sandwich the upper surface and the lower surface from the surface of the abutting piece. A structure in which an extension piece is extended downward from the end of the upper clamping piece so that both sides of the metal fitting can be clamped, and a locking piece is extended outward from the end of the extension piece. It is preferable to use one that is made by welding the gap between the steel column and the diaphragm after removing the temporary fastener attached to the welding backing metal fitting. When using the one that protrudes diagonally, it can be attached to the welding backing metal fitting by sandwiching the upper surface and the lower surface of the welding backing metal fitting between the holding pieces of the temporary fixing equipment. By pulling the handle part of the It is possible to remove the temporary fasteners from the tool.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the details of the present invention will be described with reference to the embodiments shown in FIGS. The connection structure A of steel columns is shown in FIG.
3 to 3, a hollow steel column 1 having a tapered portion 1a at its tip, a backing metal fitting 2 for welding having a substantially rectangular cross section capable of abutting the inner surface of the steel column 1, a plate-shaped diaphragm 3, a welding backing It is composed of a temporary stopper B of the metal fitting (hereinafter simply referred to as temporary stopper B). In particular, the temporary fastener B is mainly used for welding the steel column 1 and the diaphragm 3 while being attached to the welding backing metal fitting 2.

A temporary fastener B of a typical embodiment according to the present invention can position the welding backing metal fitting 2 on the steel column 1 and perform temporary fastening. Is disclosed in. First, in the temporary fastener B of the first embodiment, as shown in FIG. 6, the support portion 5 and the sandwiching portion 6 are provided so that the end portion of the welding backing metal fitting 2 can be sandwiched by the one end 4a of the contact piece 4. A locking piece that has a substantially L-shaped support piece 7 that extends substantially vertically and that locks to the tip 1a of the steel column 1 in a direction opposite to the extending direction of the support piece 7 from one end 4b of the contact piece 4. 8 is extended substantially horizontally, and the holding portion 6 of the support piece 7 is bent inward in a V shape. As the material of the temporary fastener B,
It is particularly preferable to use the same material as the steel column 1, but it is also possible to use other metals. Incidentally, the temporary stopper B in the example of the drawing
As shown in FIG. 6, a substantially L-shaped support piece 7 having a support portion 5 and a sandwiching portion 6 so as to sandwich the end portion of the welding backing metal fitting 2 from one end 4a of the contact piece 4 is disposed substantially vertically. Although extended, a supporting piece 7 that does not have the sandwiching portion 6 but simply includes the supporting portion 5 may be extended so that the lower surface of the welding backing metal fitting 2 can be supported. In addition, the temporary fastener B in the illustrated example
Is formed by press working, but unless otherwise particular, the contact piece 4 is formed without extending the support piece 7 and the locking piece 8 from the end of the contact piece 4. It is also possible to extend the support piece 7 and the locking piece 8 from the middle of the front surface or the back surface.

Further, the temporary stopper B of the second embodiment shown in FIG. 7 has substantially the same structure as the temporary stopper B of the first embodiment,
As shown in FIG. 7, the locking piece 8 is locked so as to extend obliquely downward so as to come into contact with the tapered portion 1a of the steel column 1 or not to come into contact therewith.

In addition, the temporary fastener B of the third embodiment shown in FIG. 8 is an application of the temporary fastener B of the first embodiment, and two temporary fasteners B of the first embodiment are arranged in parallel. It is provided by connecting the contact pieces 4 and 4 with the connecting piece 9. The connecting piece 9 is bent along the corner 10 of the backing metal fitting 2 for welding in FIG. Corner 10 of backing metal fitting 2 for welding
It is attached to each side over.

FIG. 9 shows a temporary stopper B of the fourth embodiment. This temporary fastener B has substantially the same shape as the temporary fastener B of the first embodiment as shown in FIG. 9, but the upper end portion of the welding backing metal fitting 2 is clamped and attached to the steel pillar 1. In this state, after temporarily fixing by spot welding 12 etc., the temporary fixing tool B is removed and the upper end of the backing metal fitting 2 for welding is protruded by a constant distance, that is, a distance m in the figure as shown in FIG. It is intended to hold.

Next, the connecting structure A of steel columns using these temporary fasteners B will be described. Steel pillar connection structure A
As shown in FIGS. 1 to 3, is composed of a steel column 1, a backing metal fitting 2 for welding, a plate-shaped diaphragm 3, and a temporary stopper B. The backing metal fitting 2 for welding is in the shape of a strip having a substantially quadrangular cross section, and may have a substantially U-shape in a plan view or a substantially L-shape in a plan view. The one shown in FIG. 3 has a substantially U-shaped temporary stopper B in plan view.
Is taken as an example. That is, as a method of connecting the steel columns 1,
For the backing metal fitting 2 for welding that can contact the inner surface of the hollow steel column,
As shown in FIG. 5, the temporary stopper B of the backing metal fitting for welding having the locking piece 8 that can be locked to the opening end 11 ′ of the steel column 1 is the contact piece 4 and the support piece 7 in the temporary fastener B. Sandwiching the lower end of the welding backing metal fitting 2 between them, and attaching a plurality of them as shown in FIG. 3; inserting the welding backing metal fitting 2 through the opening 11 ′ of the steel pillar 1, A step of holding the upper end of the backing metal fitting 2 for welding by a certain distance, that is, a distance m in FIG. And; in this state, a step of temporarily fixing the lower end of the welding backing metal fitting 2 to the steel column 1 by spot welding 12 or the like as shown in FIG. 2; and removing the temporary fixing tool B attached to the welding backing metal fitting 2. Instead, place the diaphragm 3 on this, and weld the entire circumference of the gap between the steel column 1 and the diaphragm 3 as shown in FIG. In which the more the step of connecting the steel column 1 in. That is, in this way, the steel columns 1 can be similarly connected vertically to form the steel column connection structure A as shown in FIG.

As described above, according to the method of connecting the steel columns 1 according to the present invention, the temporary stopper B is attached to the welding backing metal fitting 2 and the locking piece 8 is locked to the opening end 11 'of the steel column 1. Just let
The backing metal fitting 2 for welding can be easily temporarily fixed to the steel pillar 1. Moreover, as shown in FIG. 5, the backing metal fitting 2 for welding is used.
Since the upper end of the welding is held in a state of being protruded by a constant distance, that is, a distance m in the figure, the protruding distance of the backing metal fitting 2 for welding can be made constant at all times, and an accurate connection structure of steel columns A can be formed. Furthermore, this temporary fastener B
Since the gap between the steel column 1 and the diaphragm 3 is welded all around by welding 13 without removing, the useless work can be omitted. Further, the connection structure A of the steel columns of the first embodiment
According to the above, since the holding portion 6 of the support piece 7 is bent inward in a V shape, the contact piece 4 of the temporary fastener B and the holding portion 6 of the support piece 7 prevent the welding backing metal fitting 2 from being bent. Since it is sandwiched in close contact with the side surface, the welding backing metal fitting 2 does not come off from the temporary fastener B.

The details of the present invention will now be described with reference to the embodiments shown in FIGS. Especially, the temporary fastener B '
Is mainly for welding the steel column 1 and the diaphragm 3 after removing from the welding backing metal fitting 2.
It is disclosed in FIGS. 13 to 16. Further, these temporary fasteners B'can be reused several times.

First, the temporary stopper B'of the fifth embodiment is shown in FIG.
As shown in Fig. 5, the upper surface 14a and the lower surface 14b of the welding backing metal fitting 2 are
The gripping piece is separated from the surface of the contact piece 4 by a distance that allows the gripping
15a and 15b are arranged in parallel, and an upper holding piece 15 is provided so that both side surfaces 16 of the backing metal fitting 2 for welding can be held with the abutting piece 4.
A piece 17 extending downward from the end a extends the locking piece 8 substantially horizontally outward from the end, and further, a plate-like handle portion 18 is obliquely downward from the lower part of the rear surface of the contact piece 4. 15 and project it to the
A notch 19 is provided at the center of b. The handle part
It suffices that 18 be projected from an appropriate position on the back surface of the contact piece 4, and the handle portion 18 is not limited to a plate-like member, and may be a rod-shaped member. Further, as the material of the temporary fastener B ′, the same material as the steel column 1 or another metal or synthetic resin can be adopted. Further, it is not necessary to provide the handle portion 18 in particular, and
Like the temporary stopper B'of the seventh embodiment shown in FIG.
It may be a simple shape without the notch and without the notch 19 in the sandwiching piece 15b.

Further, in the temporary fixing tool B'of the eighth embodiment shown in FIG. 16, the contact pieces 4 are not extended from the both ends of the contact pieces 4 and the middle of the surface of the contact piece 4 is provided. The sandwiching pieces 15a and 15b are arranged in parallel with each other, and the upper portion or the lower portion of the contact piece 4 is used as the handle portion 18. In addition, in the temporary fixing tool B'of the sixth embodiment shown in FIG. 14, two temporary fixing tools B'of the fifth embodiment are arranged in parallel, and the contact pieces 4, 4 are connected to each other by a connecting piece 9 '. It is connected with.

Next, a steel column connecting structure A'using these temporary fasteners B'will be described. As shown in FIGS. 10 and 11, the connecting structure A'of steel columns is composed of steel columns 1, a backing metal fitting 2 for welding, a plate-like diaphragm 3, and a temporary fastener B '. As a method of connecting the steel columns 1, a welding backing metal fitting 2 that can abut the inner surface of the hollow steel column has a locking piece 8 that can be locked at the opening end 11 ′ of the steel column 1. As shown in FIG. 12, the temporary backing metal fitting B'of the backing metal fitting is welded between the sandwiching pieces 15a and 15b of the temporary backing metal fitting B '.
11 to sandwich the upper surface 14a and the lower surface 14b, and to attach a plurality of locking pieces 8 so as to project outward, as shown in FIG. 11; the welding backing metal fitting 2 from the opening 11 'of the steel column 1. The upper end of the backing metal fitting 2 for welding was projected by a fixed distance, that is, a distance m in FIG. 12, by fitting and engaging the locking piece 8 of the temporary fastener B with the opening end 11 ′ of the steel column 1. A step of holding the welding backing metal fitting 2 in this state; and a step of temporarily fixing the lower end of the welding backing metal fitting 2 to the steel column 1 by spot welding 12 or the like as shown in FIG. 10; The handle portion 18 of the stopper B is pulled obliquely upward to remove it, and the diaphragm 3 is positioned on this, and the steel pillar 1 and the diaphragm 3
This is a process of connecting the steel columns 1 as shown in FIG. That is, in this manner, the steel columns 1 can be similarly connected vertically to form the connecting structure A'of steel columns as shown in FIG. In particular, when removing the temporary stopper B ′ from the welding backing metal fitting 2, if the thickness of the temporary stopper B ′ is made thin as shown in FIG. 17, the temporary stopper B ′ can be pulled by pulling the handle portion 18. It deforms and can be easily removed as shown by the imaginary line in the figure.

As described above, when the temporary stopper B'of the fifth embodiment is used, the clamping piece 15b should have elasticity as compared with the temporary stopper B'of the seventh embodiment of FIG. Because you can
It becomes easy to attach to and detach from the backing metal fitting 2 for welding.

[0023]

Since the present invention is configured as described above, it has the following effects. According to the method for connecting steel columns according to claim 1, the temporary fastening is attached to the welding backing metal fitting, and the locking piece of the temporary fastening is simply locked to the open end of the steel column for welding the steel column. The backing metal fitting can be easily temporarily fixed, and the upper end of the welding backing metal fitting is held in a protruding state by a certain distance, so that the protruding distance of the welding backing metal fitting is always constant. Therefore, it is possible to form an accurate connection structure of steel columns.

According to the method of connecting steel columns of claim 2, since the connection is made by welding the entire circumference of the gap between the steel column and the diaphragm without removing the temporary fastener, wasteful work can be omitted. Since the lower end of the welding backing metal fitting is supported by the supporting portion of the supporting piece of the temporary fixing tool and is clamped by the abutting piece and the clamping portion of the supporting piece, the welding backing metal fitting should come off from the temporary fixing material. There is no.

According to the method of connecting steel columns of the third aspect, since the holding portion of the support piece in the temporary fixing tool is bent inwardly in a V shape, the contact piece and the supporting piece in the temporary fixing tool are connected to each other. It is more effective because it is held in close contact with the side surface of the welding backing metal fitting by the holding portion.

According to the method of connecting steel columns of claim 4, since the upper and lower surfaces of the welding backing metal fitting are clamped between the clamping pieces of the temporary fastener, they are attached to the welding backing metal fitting. Since the temporary stopper does not come off from the backing metal for welding, and the handle part protrudes from the back surface of the contact piece, it is possible to hold this handle part. Can be removed from the metal fittings.

According to the method of connecting steel columns of the fifth aspect, since the handle portion is projected obliquely downward from the lower portion of the rear surface of the contact piece, it is easy to apply force to the handle portion and can be easily removed.

[Brief description of drawings]

FIG. 1 is a perspective view of a connection structure of steel columns.

FIG. 2 is a partial vertical cross-sectional view of a connection structure of steel columns when the temporary fastener of the first embodiment is used.

FIG. 3 is an exploded perspective view showing a state in which a welding backing metal fitting is held in an opening of a steel column by using the temporary fastener of the first embodiment.

FIG. 4 is a vertical cross-sectional view showing a state in which a welding backing metal fitting is held in an opening of a steel column by using the temporary fastener of the first embodiment.

FIG. 5 is a vertical cross-sectional view showing a main part of a state in which a welding backing metal fitting is held in an opening of a steel column by using the temporary fastener of the first embodiment.

FIG. 6 is a perspective view of a temporary stopper according to the first embodiment.

FIG. 7 is a side view of the temporary stopper according to the second embodiment.

FIG. 8 is a rear view of the temporary stopper according to the third embodiment.

FIG. 9 is a vertical cross-sectional view showing a main part of a state in which a welding backing metal fitting is held in an opening of a steel column by using a temporary fastener according to a fourth embodiment.

FIG. 10 is a partial vertical cross-sectional view of a connection structure of steel columns when they are connected using the temporary fastener of the fifth embodiment.

FIG. 11 is an exploded perspective view showing a state where a welding backing metal fitting is held in an opening of a steel column by using the temporary fastener of the fifth embodiment.

FIG. 12 is a vertical cross-sectional view showing a state in which a backing metal for welding is held in an opening of a steel column by using the temporary fastener of the fifth embodiment.

FIG. 13 is a perspective view of a temporary fastener according to a fifth embodiment.

FIG. 14 is a rear view of the temporary stopper according to the sixth embodiment.

FIG. 15 is a perspective view of a temporary stopper according to a seventh embodiment.

FIG. 16 is a vertical sectional view of a temporary stopper according to an eighth embodiment.

FIG. 17 is an explanatory cross-sectional view when removing the temporary fixing tool of the fifth embodiment from the welding backing metal fitting.

[Explanation of symbols]

 A Steel column connection structure B Temporary fastener for welding backing metal fitting 1 Steel column 2 Welding backing metal fitting 3 Diaphragm 4 Abutment piece 5 Supporting part 6 Clamping part 7 Supporting piece 8 Locking piece 9 Connecting piece 10 Square Part 11 Opening 12 Spot welding 13 Welding 15 Clamping piece 16 Side piece 17 Extension piece 18 Handle section 19 Notch section

Claims (5)

[Claims] 1. A plurality of temporary fasteners for a backing metal for welding having a locking piece that can be locked at the open end of the steel column are attached to the backing metal for welding that can abut the inner surface of the hollow steel column. Steps: Insert the backing metal fitting for welding from the opening of the steel column, and make the upper end of the welding backing metal part protrude a certain distance by locking the locking piece of the temporary fastener to the opening end of the steel column. In the state of holding, the step of temporarily fixing the welding backing metal fitting to the steel column by spot welding etc. in this state, without removing or removing the temporary fixing tool attached to the welding backing metal fitting, A method of connecting steel columns, which comprises connecting a steel column by welding a gap between the steel column and the diaphragm on the diaphragm, and connecting the steel columns. 2. A temporary fastener for a backing metal fitting for welding, which has a support portion and a holding portion so that a lower end portion of the backing metal fitting for welding can be held between one end of the abutting piece and the corresponding contact piece. For welding, use a structure in which a V-shaped support piece is extended substantially vertically, and a locking piece that can be locked to the tip of the steel column is extended from the other end of the contact piece in the direction opposite to the support piece. The method of connecting steel columns according to claim 1, wherein the gap between the steel column and the diaphragm is welded without removing the temporary fastener attached to the backing metal fitting. 3. The method for connecting steel columns according to claim 2, wherein a temporary stopper of a backing metal fitting for welding, which is formed by bending the holding portion of the support piece inward in a V shape, is used. 4. As a temporary stopper for a backing metal fitting for welding, the holding piece is arranged in parallel with the upper surface and the lower surface of the backing metal fitting for welding so as to be able to hold the upper surface and the lower surface of the abutting piece. The extension piece extends downward from the end of the upper clamping piece so that both sides of the welding backing metal can be clamped with the piece, and the locking piece extends outward from the end of the extension piece. 2. The method for connecting steel columns according to claim 1, wherein the steel column and the diaphragm are welded after the temporary fasteners attached to the welding backing metal fittings are removed by using the installed components. 5. The method of connecting steel columns according to claim 4, wherein a temporary stopper of a backing metal fitting for welding is used, in which the handle portion is obliquely projected downward from the lower portion of the rear surface of the contact piece.