JP3326082B2 - Backing fixture for welding - 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 for welding a backing metal used for welding a column member as a vertical member and a beam or a girder member as a horizontal member in a steel building prior to welding. The present invention relates to a backing metal fixing jig for fixing and holding the fixing member.

[0002]

2. Description of the Related Art Conventionally, when welding a flange edge of a horizontal member made of H-shaped steel to a side surface of a vertical member or the like, a joint between a groove of the flange edge of the horizontal member and a side surface of the vertical member has been used. A backing metal is attached to the lower surface so that sufficient welding can be obtained by sufficient penetration into the groove. In this case, before the main welding is performed on the groove, it is necessary that a backing metal is temporarily attached to the lower surface between the flange edge groove of the horizontal member and the side surface of the vertical member in advance. Therefore, spot welding for temporarily attaching the backing metal to the back side of the flange edge of the horizontal member is performed as a pretreatment step of the main welding to the groove portion.

[0003]

In order to temporarily attach the backing metal, the backing metal is supported by one hand and the other hand is first spot-welded to the center, then to the left and right sides, and then to the center again. It is performed in the procedure of performing it in the department. Therefore, when performing spot welding of each part, the spot welding must be performed in a state where the backing metal is not closely adhered to the back surface of the flange edge of the horizontal member as a base material or the side surface of the vertical member without any gap. There is a problem such as that a gap is created between the backing metal and each base material by bending, or it is bent and welded.In addition, as a pre-processing for performing the original welding work, a temporary attachment at a plurality of locations is performed. Doing it takes a lot of time to do so,
This has been a problem in improving work efficiency as a whole.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems associated with the conventional backing tacking process.
By simply fixing the backing metal to the lower surface between the flange edge of the horizontal member and the side surface of the vertical member, the main welding can be started immediately without temporarily attaching the backing metal to the base material. It is an object of the present invention to provide a backing metal fixing jig which can be expected to improve work efficiency.

According to a first aspect of the present invention, there is provided a jig for fixing and holding a backing metal on a back surface of a lateral edge of a lateral member in a flange width direction.
The front end has a backing support surface, and the rear end abuts a bracket provided with a base protruding above the flange on the lower side surface along the longitudinal direction of the flange. A first fixing means for rotating the arm in the vertical direction by rotating the lever and temporarily fixing the rear end of the bracket to the flange by a pressing element, and a pressing means different from the pressing element. Second fixing means for crimping the rear end of the bracket to the flange by means of a child.

The first fixing means for temporarily fixing the rear end of the bracket to the flange includes an L-shaped arm having a lower end of a short side pivotally attached to a tip end of a bearing fixed on a base; A lever having a distal end pivotally attached to a corner of the L-shaped arm, a link connecting the rear end of the lever at the distal end of the L-shaped arm, and a rear end of the bearing, and a push screwed to the distal end of the L-shaped arm It is preferable to use a structure having a screw rod as a child.

[0007] The second fixing means for crimping the rear end of the bracket to the flange preferably has a pressing element formed of a screw rod.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a backing metal fixing jig according to the present invention will be described with reference to an embodiment shown in the drawings. This fixing jig shows only one shape in FIG. As shown in FIG. 2, the lateral member 1 is composed of a pair of left and right symmetrical jigs attached to both side edges 2a along the longitudinal direction of the flange 2.

As shown in FIG. 1, each of the jigs on one side has a concave support surface 4 for supporting a backing metal 5 at a front end and a base 7 projecting above the flange 2 at a rear end. A bracket 3 which is in contact with the lower surface of one side 2a along the longitudinal direction of the flange 2 of the horizontal member 1 and a rear portion of the bracket 3 provided on the base 7 And a second fixing means 1 for securely pressing the rear portion of the bracket 3 to the flange 2 by another means different from the first fixing means 10.
And 8.

The bracket 3 is composed of a pair of plates 3 arranged vertically and in parallel along the longitudinal direction of the lower surface of the flange 2.
a, 3b, at the tip of each plate 3a, 3b, FIG.
Is provided with the concave support surface 4 for supporting the back surface of the backing metal 5 disposed through the scallops 24 formed on the edge of the web 23 of the horizontal member 1 shown in FIG. FIG. 4 shows a state in which the backing metal 7 is mounted integrally on the concave support surface 4 at the end by being integrally connected by the horizontal connecting plate 6.
As described above, the upper edge of the plate 3b and the connecting plate 6 are brought into contact with the lower surface of the one side 2a of the flange 2 so that the surface of the backing metal 5 can be in close contact with the rear surface of the flange groove 2b. ing.

At the rear end of the bracket 3, the base 7 for supporting the first fixing means 10 is provided. The base 7 is a vertical plate 7 having the rear end of the outer plate 3a of the bracket 3 raised upward by a predetermined height.
a, and a horizontal support plate 7b protruding laterally from the upper end of the vertical plate 7a toward the upper surface of the flange 2. The first fixing member is mounted on the upper surface of the support plate 7b on the base 7. A bearing member 8 having shaft mounting portions 9a and 9b is provided at a front end and a rear end for mounting the means 10.

The first fixing means 10 attached to the bearing 8 has a short side 11 at the front end bearing 9a of the bearing 8.
b, a horizontal L-shaped arm 11 having a lower end pivotally mounted thereon, and a lever 12 having a distal end pivotally mounted at a corner of the L-shaped arm 11.
And a link 13 for connecting a rear portion of the lever 12 with respect to a front shaft mounting portion and a rear shaft mounting portion 9b of the bearing member 8;
The L-shaped arm 11 includes a screw rod 15 as a pressing element screwed to a nut 14 provided at the tip of the L-shaped arm 11.

The screw rod 15 has a wing nut-shaped image 1 at its upper end.
A fixing plate 17 is attached at the lower end to the surface of the flange 2. The fixing plate 17 is rotated by the photographing 16 to set the length position in the vertical direction via a nut 14 fixed to the lever 12. It can be adjusted.

The base support plate 7b to which the first fixing means 10 is attached is provided with the second fixing means 18 for securely pressing the rear part of the bracket 3 to the flange 2. However, the second fixing means 18
Like the screw rod 15 in the first fixing means 10, the upper end screwed into the female screw hole 19 provided in the support plate 7b has a wing nut shaped photograph 21 at the upper end, and the surface of the flange 2 at the lower end. The fixing plate 22 is formed by a screw rod 20 as a pressing element having a fixing plate 22 attached thereto, and can be adjusted in the vertical direction through the female screw hole 19 by being rotated by the taking 21. I have.

Before the backing metal fixing jig is attached to the flange 2, the first fixing means 10 moves the lever 12 in accordance with the thickness of the flange 2 as shown in FIGS. The screw 1 as a pressing element is
5 is set in a vertical state, and the fixing plate 1 at the lower end is
The length is adjusted in advance so that the flange 7 can lightly press the flange 2, and the second fixing means 18 also applies the connecting plate 6 at the rear end of the bracket 3 to the lower surface of the flange side 2a as shown in FIG. The screw rod 20 as a pressing element is adjusted to a length such that an interval is provided such that the fixing plate 22 can be fitted into the female screw hole 19 above the flange 2 with a sufficient margin.

After adjusting the first and second fixing means as described above, first, as shown in FIG. 3, one of the right and left brackets 3 is pushed upward by the lever 12 of the first fixing means 10. In one state, one side 2a of the flange 2
Fit it on the bottom.

As described above, when the lever 12 is pushed upward, the tip of the lever 12 rotates about the shaft attachment portion to the corner of the L-shaped arm 11, and at this time, the lever 1
Link 1 for connecting bearing member 2 with rear end bearing portion 9b of bearing member 8
3 rotates clockwise, so that the L-shaped arm 11
Pivots around the short side 11b and the front end shaft attaching portion 9a of the bearing 8, pivots a screw 15 as a pressing element provided at the tip of the L-shaped arm 11 upward, and attaches the bracket 3 to the flange 2.
So that it can be easily attached to

While the bracket 3 is thus attached to the lower surface of the one side 2a of the flange, the backing metal 5 is
In the state where the backing metal 5 is passed through the scallops 24 formed at the edge of the bracket 3, one end of the backing metal 5 is
, And in this state, the lever 12 of the first fixing means 10 is pushed down in the horizontal direction as shown in FIG.

When the lever 12 is pushed downward with the bracket 3 attached to the lower surface of one side 2a of the flange, the tip of the L-shaped arm 11 pivots downward as shown in FIGS. 1 as a pusher provided at the tip
5, the fixing plate 17 at the lower end is pressed against the surface of the flange 2, and the flange 2 is clamped between the screw rod 15 and the lower bracket 3, so that the bracket 3 is supported at that time. Bracket 3 even if you release your hand
Is temporarily fixed to the flange 2.

Next, another bracket 3 attached to the opposite side of the flange 2 is also attached to the flange 2 in the same procedure as described above, and then is used as a pressing element in the second fixing means 18 behind the base 7. By evenly tightening the respective screw rods 20 to the flange 2 as shown in FIG.
A pair of left and right brackets 3 is securely supported on both sides of the flange 2, and the screw 20 is tightened to push up the front end of the bracket 3, thereby supporting the back support supported by the concave support surface 4 at the front end. 5 has a vertical edge 25a.
In this state, the backing metal 5 can be directly welded to the groove 2b without temporarily welding the backing metal 5 to the base material.

[0021]

As described above, in the backing metal fixing jig of the present invention, the brackets 3 of the pair of right and left fixing jigs are respectively fitted to the flange side 2a behind the welded portion, and the rear base 7 is fixed. By simply pressing down the lever 12 of the upper first fixing means 10, the screw rod 15 as a pressing member presses the surface of the flange 2 and temporarily fixes the bracket 3 supporting both ends of the backing metal 5 to the flange 2. And then the second
By tightening the screw rod 20 as a pressing element of the fixing means 18, the setting of the backing metal 5 to the welded portion can be easily obtained, and the main welding can be performed immediately after the setting of the backing metal 5 is completed.

Therefore, the use of this backing metal fixing jig eliminates the necessity of temporarily attaching the backing metal to the welded portion in the conventional manner, so that the entire work time required for welding is greatly reduced. And it is not necessary to hold the backing money by hand, thus simplifying the work,
In addition, since the backing metal can be correctly set with respect to the welded portion, welding work can be performed accurately and without defects.

When a screw and a nut are used as the pressing elements in the first and second fixing means, the length of the screw can be freely adjusted, and the length of the screw can be adjusted regardless of the change in the flange plate thickness. It can also be used for backing metal welds under various conditions.

[Brief description of the drawings]

FIG. 1 is a perspective view of a backing metal fixing jig on one side in a state where first fixing means is closed.

FIG. 2 is a side view showing a state where the first fixing means is closed.

FIG. 3 is a side view showing a state where the first fixing means is opened.

FIG. 4 is a rear view showing the relationship between the backing metal fixing jigs on both sides as viewed in the direction of the line AA in FIG. 3;

[Explanation of symbols]

 1: lateral member 2: flange 2a: flange side 2b: groove 3: bracket 3a, 3b: plate 4: support surface 5: backing plate 6: connecting plate 7: base 7a: vertical plate 7b: support plate 8 : Bearing 9a, 9b: Axle attachment part 10: First fixing means 11: L-shaped arm 12: Lever 13: Link 14: Nut 15: Screw rod 16: Shooting 17: Fixing plate 18: Second fixing means 19: female screw hole 20: screw rod 21: shooting 22: fixing plate 23: web 24: scalloped 25: vertical member

Claims (1)

(57) [Claims] 1. An edge of a horizontal member in a flange width direction is attached to a vertical member.
When welding to the side, open the lateral edge of the transverse member flange.
A jig used for fixing holds the backing metal to the joint lower surface of the side surface of the preceding and the longitudinal member, along the longitudinal direction of the flange
This bracket consists of a bracket
Rackets are arranged along the longitudinal direction of the lower surface of the flange
A plate having a backing support surface at the tip, and a rear end outside the plate
The vertical plate whose surface has been raised upwards and the upper end of the vertical plate
A horizontal support plate protruding sideways toward the top of the lunge
The base comprises
The horizontal support plate of the base is provided with first fixing means for temporarily rotating the arm in the vertical direction by rotating the lever and temporarily fixing the rear end of the bracket to the flange by means of a pressing element. And a second fixing means for crimping the rear end of the bracket to the flange with the pressing element of (1).