JPH074289Y2 - Temporary fastening connection structure for steel columns and temporary fastening tool for welding backing metal fittings used therefor - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention provides a temporary fixing of a steel column in which a backing metal for welding is temporarily fixed to a steel column in the process of forming a connection structure of steel columns for construction or construction. The present invention relates to a connection structure and a temporary fixing tool for a backing metal fitting for welding used therein.

[Conventional technology]

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 square steel pillar, and the backing metal fittings for welding are projected for a certain distance. In this state, after spot welding and positioning, the steel column is welded to the welding backing metal fitting, and the diaphragm is placed on the upper surface of this welding backing metal fitting to weld the steel pillar and the diaphragm to the steel pillar. The method of connecting up and down is taken. Then, as a method of temporarily fixing the welding backing metal fitting to the conventional steel column, the welding backing metal fitting is manually positioned so as to project a certain distance from the opening end of the steel pillar, and for example, a shrimp vise is used. The backing metal fittings for welding are temporarily fixed by using several spots, fixing and spot welding.

[Problems to be solved by the device]

However, with the conventional method, it is necessary to position the backing metal fitting for welding with one hand so that it protrudes a certain distance from the open end of the steel column, and fix it with a shrimp vise with one hand. Not only is it troublesome, but it may not be possible for one person to do it, and there is the problem that the distance by which the welding backing metal fitting is projected is not constant.

In view of this, the present invention provides a method of temporarily fixing a backing metal fitting for welding to a steel column, and moreover, a distance of projecting a temporary fixing tool of the backing metal fitting for welding is always constant. An object of the present invention is to provide a stop connection structure and a temporary fastener for a backing metal fitting for welding used therein.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, a temporary fixing connection structure for a steel column according to the present invention includes a hollow steel column; a welding backing metal member having a substantially rectangular cross section capable of abutting an inner surface of the steel column; The upper and lower surfaces of the metal fitting are arranged in parallel with each other so that the upper surface and the lower surface of the metal fitting can be sandwiched from the surface of the contact piece, and the upper part is clamped so that both side surfaces of the back metal fitting for welding can be clamped with the contact piece. A temporary stopper of a backing metal fitting for welding, which is formed by extending an extending piece downward from one end and extending a supporting piece outward from the end of the extending piece. Attach the appropriate number of welding backing metal fittings to the welding backing metal fitting so that the welding backing metal fitting is sandwiched between The backing metal fitting for the welding is inserted from the opening of the steel column, and the temporary end of the backing metal fitting for welding is attached to the opening end of the steel column. Spot welding the backing metal for welding and the steel column that hold the upper part of the backing metal for welding by protruding a certain distance by locking the support piece, then remove the temporary fixing tool of the backing metal for welding. It will be.

Further, in order to achieve the above-mentioned object, the provisional fastener of the welding backing metal fitting in the present invention separates the clamping piece from the surface of the contact piece at a distance that allows the upper surface and the lower surface of the welding backing metal fitting to be clamped. Arranged in parallel, the extension piece is extended downward from the upper end of the clamping piece so that both side surfaces of the welding backing tool can be clamped by the abutting piece, and the extension piece extends outward from the extended piece end. The support piece is extended toward.

And, as for the temporary fixing tool of the backing metal fitting for welding due to the effect described later, it is preferable that the handle portion is projected from the rear surface of the contact piece, and particularly, the handle portion is projected obliquely downward from the lower part of the rear surface of the contact piece. preferable.

[Action]

As described above, according to the provisional fastener of the welding backing metal fitting of the present invention, the welding backing metal fitting is sandwiched between the gripping pieces and the supporting piece is projected outwardly. Attach an appropriate number of temporary fasteners, insert the welding backing metal fittings with these temporary fasteners through the opening of the steel column, and bring the welding backing metal fitting into contact with the steel column to open the steel column. By locking the support piece of the temporary fastener to the end, the welding backing metal fitting and the steel column are held with the upper part of the welding backing metal fitting protruding for a certain distance, that is, the length of the extension piece. Spot welding,
Next, the temporary holding connection structure of the steel column can be formed by holding the handle portion by hand and removing the temporary holding tool. Then, after welding the temporarily fixed steel column and the entire circumference of the welding backing metal fitting, place the diaphragm on the upper surface of the welding backing metal fitting and weld the steel pillar and diaphragm around the entire circumference. It can be connected vertically to form a connection structure of steel columns.

〔Example〕

The details of the present invention will be explained based on the illustrated embodiment.

Usually, a connecting structure A of steel columns has a hollow steel column 1 having a tapered portion 1 ′ at its tip as shown in FIGS. 1 and 2, and a substantially square cross section that can abut the inner surface of the steel column 1. It comprises a backing metal fitting 2 for welding and a plate-shaped diaphragm 3.

The temporary backing fitting B for the welding backing metal fitting according to the embodiment of the present invention is capable of positioning the welding backing metal fitting 2 on the steel column 1 for temporary fixing. It is disclosed in FIG.

First, as shown in FIG. 6, the temporary fastener B of the first embodiment is separated from the surface of the abutting piece 6 by a distance such that the upper surface 4 and the lower surface 5 of the welding backing metal fitting 2 can be sandwiched. , 8'are arranged in parallel, and the abutting pieces 6 and the side surfaces 9 and 9 of the backing metal fitting 2 for welding together.
So that it can be sandwiched, an extending piece 11 is extended downward from the end of the upper sandwiching piece 8 and a support piece 12 is extended substantially horizontally outward from the end of the extending piece 11. Further, a plate-like handle portion 13 is projected obliquely downward from the lower part of the rear surface of the contact piece 6, and a notch portion 14 is provided at the center of the holding piece 8 '. It should be noted that the handle portion 13 may be made to project from an appropriate position on the back surface 15 of the contact piece 6, and the handle portion 13 is not limited to a plate-like member and may be a rod-like 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, and the temporary fastener B can be reused several times.

Further, it is not necessary to provide the handle portion 13 in particular, and the handle portion 13 is not provided and the notch portion 14 is not provided in the sandwiching piece 8'as in the temporary stopper B of the second embodiment shown in FIG. It may have a simple shape.

Furthermore, the temporary fastener B of the third embodiment shown in FIG. 9 does not extend from the both ends of the contact piece 6 with the sandwiching pieces 8 and 8 ′, but clamps it from the middle of the surface of the contact piece 6. The pieces 8 and 8'are arranged in parallel, and the upper portion of the contact piece 6 is used as the handle portion 13.

In addition, the temporary fastener B shown in FIG. 7 is an application of the temporary fastener B of the first embodiment, and the contact pieces 6 of the temporary fastener B of the first embodiment are connected by the connecting piece 16. The connecting piece 16 is bent along the corner 17 of the backing metal fitting 2 for welding, for example, on each side across the corner 17 of the backing metal fitting 2 for welding which is substantially U-shaped in plan view. It is designed to be attached.

Next, the temporary fixing connection structure C of the steel column using these temporary fixing tools B will be described.

The steel column temporary fixing connection structure C is composed of a steel column 1, a welding backing metal fitting 2, and a welding backing metal fitting temporary fixing tool B. In particular, the welding backing metal fitting 2 is substantially flat in plan view. It is possible to employ a letter-shaped member or a letter L-shaped member in a plan view, but in the example shown in the figure, a temporary stopper B having a substantially U-shape in a plan view will be described as an example. ing. That is, as shown in FIGS. 4 and 5, the temporarily fixed connection structure C of the steel columns has the holding piece 8,
The long side 18 and the short side 19 of the welding backing metal fitting 2 are arranged so that the welding backing metal fitting 2 having a substantially U-shape in plan view is sandwiched between the 8'and the supporting piece 12 protruding outward. Two or one temporary fastener B is attached to each, and the welding backing metal fitting 2 to which the temporary fastener B is attached is inserted from the opening 21 of the steel column 1 to attach the welding backing metal fitting 2 to the steel column. The support piece 12 of the temporary fastener B is brought into contact with the inside of the steel pillar 1 to engage with the support piece 12 of the temporary fastener B, so that the upper portion of the welding backing metal fitting 2 is separated by a predetermined distance, that is, an extension piece.
Spot welding 22 the backing metal fitting 2 for welding and the steel column 1 held in a state of protruding by the length of 11, and then holding the handle portion 13 by hand to remove the temporary fastener B, and FIG. It is formed as follows. In particular, when removing the temporary fastener B from the welding backing metal fitting 2, if the thickness of the temporary fastener B is reduced as shown in FIG. 10, the temporary fastener B will be deformed when the handle portion 13 is pulled. Can be easily removed.

Then, after forming the temporarily fixed joint structure C of the steel columns as shown in FIG. 3, after welding the entire circumferences of the temporarily fixed steel columns 1 and the backing metal fitting 2 for welding, as shown in FIG. The diaphragm 3 is placed on the upper surface of the backing metal fitting 2 for welding, and the steel column 1 and the diaphragm 3 are welded 23 around the entire circumference. Similarly, the steel column 1 is vertically joined to form a steel as shown in FIG. The pillar connection structure A can be formed.

As described above, according to the temporary connection structure C of the steel columns and the temporary fixing tool B of the welding backing metal fitting, the temporary fixing tool B is attached to the welding backing metal fitting 2 and the supporting piece 12 of the temporary fixing tool B is attached. The backing metal fitting 2 for welding can be temporarily temporarily fixed to the steel column 1 only by locking the opening end 21 ′ of the steel column 1. Moreover, since the welding backing metal fitting 2 projects from the steel column 1 by the length of the extension piece 11 of the temporary fastener B, the projecting distance of the welding backing metal fitting 2 is always constant. A good steel pillar connection structure can be formed. Further, according to the temporary fastener B of the first embodiment, since the thickness of the temporary fastener B is thin, when the handle portion 13 is pulled, the temporary fastener B is deformed as shown in FIG. Since it can be easily removed and the notch 14 is provided at the center of the holding piece 8 ', the holding piece 8'is made more elastic than the temporary stopper B of the second embodiment shown in FIG. Therefore, it is easy to attach and detach the welding backing metal to and from the temporary fastener B.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

In the temporarily fixed connection structure for steel columns according to claim 1, the temporary fixing tool is attached to the backing metal for welding, and the supporting piece of the temporary fixing tool is simply engaged with the open end of the steel column to weld to the steel column. The backing bracket for welding can be easily temporarily fixed, and the backing metal for welding protrudes from the steel column by the length of the extension piece of the temporary fixing tool. Since it is always constant, it is possible to form an accurate connected structure of steel columns.

In the temporarily fixed connection structure of steel columns according to claim 2, since the handle portion is protruded from the back surface of the contact piece, the handle portion can be held, so that the temporary fastener can be easily attached to the backing metal fitting for welding. Can be removed more.

In the temporarily connected structure for steel columns according to the third 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.

According to the fourth aspect of the present invention, there is provided a temporary fixing tool for the backing metal fitting for welding, which is simply attached to the backing metal fitting for welding, and the supporting piece of the temporary fixing tool is locked to the open end of the steel pillar. The backing metal for welding can be easily temporarily fixed, and the backing metal for welding protrudes from the steel column by the length of the extension piece of the temporary fixing tool. Since it is always constant, it is possible to form an accurate connected structure of steel columns.

In the temporary backing tool of the welding backing metal fitting according to claim 5, since the handle portion is protruded from the back surface of the abutting piece, it is possible to hold the handle portion. Can be removed from the metal fittings.

In the temporary backing metal fitting of the sixth aspect of the present invention, since the handle portion is projected obliquely downward from the lower portion of the back 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 connecting structure of steel columns, FIG. 2 is a partial vertical sectional view of a connecting structure of steel columns, and FIG. 3 is a partial vertical sectional view of a temporary fixing connecting structure of steel columns. FIG. 4 is an exploded perspective view of a case where a temporary backing metal fitting for welding is used, FIG. 5 is a vertical cross-sectional view showing a state where the temporary backing metal fitting for welding is attached, and FIG. FIG. 7 is a perspective view of a temporary fastening tool for the backing metal fitting for welding of the embodiment, FIG. 7 is a rear view of an application example of the temporary fastening tool for the backing metal fitting for welding of one embodiment, and FIG. 8 is welding of the second embodiment. 9 is a perspective view of the temporary backing metal fitting of the welding backing metal fitting, FIG. 9 is a perspective view of the temporary backing metal fitting of the welding backing metal fitting of the third embodiment, and FIG. FIG. 7 is an explanatory cross-sectional view when removing a temporary stopper of the backing metal fitting. A: Steel pillar connection structure B: Temporary fastener for welding backing metal fitting C: Steel pillar temporary fastening connection structure 1: Steel pillar, 2: Welding backing metal fitting 3: Diaphragm, 4: Top surface 5: Lower surface, 6: Abutment piece 7: Front surface, 8: Clamping piece 9: Side surface 11: Extended piece, 12: Support piece 13: Handle part, 14: Notch part 15: Back surface, 16: Connecting piece 17: Corner part, 18: Long side 19: Short side 21: Opening, 22: Spot welding 23: Full circumference welding

Claims (6)

[Scope of utility model registration request] 1. A hollow steel column, a welding backing metal member having a substantially rectangular cross section capable of abutting an inner surface of the steel column, and a surface of the abutting piece at a distance capable of sandwiching an upper surface and a lower surface of the welding backing metal member. The gripping pieces are spaced apart from each other and arranged in parallel with each other, and the extending piece is extended downward from the upper end of the gripping piece so that both side surfaces of the welding backing metal can be clamped by the abutting piece. The temporary backing fitting for welding is formed by extending the support piece outward from the end of the extending piece, and the backing metal fitting for welding is sandwiched between the sandwiching pieces and the support piece is removed from the outside. Attach a proper number of welding backing metal fittings to the welding backing metal fitting so that they protrude in one direction, then insert the welding backing metal fittings with the temporary fittings into the steel column opening, On the backing metal fitting for welding by locking the supporting piece of the temporary fixing tool of the backing metal fitting for welding to the opening end of the pillar. A certain distance welding backing metal and steel columns holding spot welded in a state of being projected, then temporarily fixed connecting structure of the steel pillars made by removing the temporary stop of the welding backing metal. 2. The temporary connection structure for a steel column according to claim 1, wherein the handle portion is projected from the rear surface of the contact piece, and the temporary retainer of the backing metal for welding is removed by holding the handle portion. 3. The temporary steel pillar according to claim 1, wherein the handle portion is obliquely projected downward from the lower part of the rear surface of the contact piece, and the temporary stopper of the welding backing metal fitting is removed by the handle portion. Stop connection structure. 4. The welding backing metal fittings are arranged in parallel at a distance such that the upper surface and the lower surface of the welding backing metal can be sandwiched from the surface of the abutting piece, and both side surfaces of the welding backing tool together with the abutting piece. So that it can be clamped, an extension piece is extended downward from the end of the upper clamping piece, and a support piece is extended outward from the end of the extension piece. Ingredient 5. The temporary fixing tool for the backing metal fitting for welding according to claim 4, wherein the handle portion is projected from the rear surface of the contact piece. 6. The tacking tool for a backing metal fitting for welding according to claim 4, wherein the handle portion is projected obliquely downward from the lower part of the rear surface of the contact piece.