JP3604225B2 - Temporary fixing device for steel plate for building structure reinforcement - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention covers a building structure with a shield made of a number of steel plates, and fills a filler between the building structure and the shield to reinforce the building structure. The present invention relates to a device for temporarily fixing steel plates before welding.
[0002]
[Prior art]
In recent years, piers (building structures) may be destroyed by earthquakes, and reinforcement is urgent. In this reinforcing step, a cylinder (shield) surrounding the pier is formed by a large number of steel plates, and the gap between the pier and the cylinder is filled with concrete or resin.
When forming the above-mentioned cylinder, the steel plates are welded after being temporarily fixed to adjacent ones. As an apparatus for this temporary fixing, for example, there is an apparatus using a pair of L-shaped angles. More specifically, the first pieces of the pair of angles are temporarily welded to the edges of the adjacent steel plates, and the second pieces of these angles are opposed to each other. In this state, the second pieces are fastened to each other with bolts and nuts so as to approach each other, thereby temporarily fixing the pieces.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional temporary fixing device, since the angle is temporarily welded to the steel plate, there is a disadvantage that it takes time to remove the angle. In addition, it is necessary to remove the scratch after the angle is removed, which requires much more time and effort.
[0004]
[Means for Solving the Problems]
According to the first aspect of the present invention, a building covering a building structure is constructed by welding a large number of steel plates to each other, and a filler is filled between the building structure and the shielding body. In the step of reinforcing, it is a device for temporarily fixing the steel plates before welding the steel plates, comprising a pair of angles, and a bolt and nut means for tightening the pair of angles closer to each other, The angle has a first piece, a second piece that extends in a direction perpendicular to the first piece and allows the bolt to pass therethrough, and a locking portion provided on the first piece. Including a shaft portion orthogonal to the first piece and extending on the opposite side of the second piece, and a protrusion protruding from the shaft portion in parallel with the first piece. The first piece of angle is along the front side of the edge of the adjacent steel plate. The second pieces of the pair of angles are arranged so as to face each other, and the shaft of the locking portion of each angle is inserted into the locking hole formed in the peripheral portion of the steel plate. The protrusions are arranged along the back surface of the steel plate.
[0005]
According to a second aspect of the present invention, in the temporary fixing device for a steel plate for reinforcing a building structure according to the first aspect, a screw hole is formed in the first piece, and the screw is formed in a shaft portion of the locking portion. A male screw screwed into the hole is formed.
According to a third aspect of the present invention, in the temporary fixing device for a steel plate for reinforcing a building structure according to the first or second aspect, the convex portion of the locking portion projects only in a direction from the shaft portion toward the edge of the steel plate. It is characterized by the following.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, a process of reinforcing the pier 1 (building structure) will be schematically described with reference to FIGS. In the present embodiment, the pier 1 has a substantially cylindrical shape with a circular cross section, but the diameter decreases upward.
[0007]
A cylinder X (shielding body) is constructed of a large number of steel plates 2 so as to surround the pier 1. The steel plate 2 is configured by bending a substantially rectangular plate shown in FIG. 3 into an arc-shaped cross section (a quarter arc in this embodiment) as shown in FIG. The upper edge 2a of the steel plate 2 is shorter than the lower edge 2b, and both side edges 2c are inclined according to the taper of the pier 1. When the pier 1 is a cylinder without a taper, the steel plate 2 forms a perfect rectangle.
[0008]
First, four steel plates 2 are arranged around the lower end of the pier 1, and the side edges 2c of the adjacent steel plates 2 are welded to each other to form the lowermost tubular portion X1.
Similarly, the four steel plates 2 form the second-stage tubular portion X2 from the bottom. The upper edge 2a of the steel plate 2 of the tubular portion X1 and the corresponding lower edge 2b of the steel plate 2 of the tubular portion X2 have the same length and are welded to each other.
[0009]
Similarly, the cylinder X surrounding the pier 1 is formed by forming the third-stage and fourth-stage cylindrical portions X3, X4. A locating pin (not shown) is fixedly penetrated to each of the edges 1a, 1b, 1c of each steel plate 2. When the locating pin hits the peripheral surface of the pier 1, the steel plate 2 is connected to the pier 1. A predetermined gap is secured, and an annular gap 3 (see FIG. 2) is formed between the tube X and the pier 1. An anchor bolt (not shown) penetrates the edges 1 a, 1 b, 1 c of each steel plate 2, and the anchor bolt is screwed into a screw hole formed on the peripheral surface of the pier 1, whereby the steel plate 2 is rotated. Thus, the tube X is stably fixed.
[0010]
Next, as shown in FIG. 2, the gap 3 between the pier 1 and the tube X is filled with a filler 4 such as concrete or resin. In this way, the pier 1 is reinforced.
[0011]
The steel plates 2 are temporarily fixed prior to welding. As shown in FIGS. 4 and 5, the temporary fixing device includes a pair of angles 10A and 10B, a bolt 20, and a nut 30 (nut means).
[0012]
As shown in FIGS. 4 and 5, the pair of angles 10A and 10B have the same L-shape, and have a first piece 11 and a second piece 12 that are orthogonal to each other. A screw hole 11a is formed at the tip of the first piece 11 of each of the angles 10A and 10B, and a locking member 15 (locking portion) similar to a bolt is screwed into the screw hole 11a. I have. The locking member 15 has a shaft 15a and a protrusion 15b formed at one end of the shaft 15a. The shaft portion 15a has a male screw and is screwed into the screw hole 11a. In this screwed state, the shaft portion 15 a extends to the opposite side of the second piece 12 orthogonal to the first piece 11. The convex portion 15b protrudes from one end of the second piece (the end opposite to the second piece 12) in parallel with the first piece 11 in only one direction. The second piece 12 has an insertion hole 12a. The nut 30 is fixed to the second piece 12 of one of the angles 10A by welding at a position corresponding to the insertion hole 12a.
[0013]
Next, the temporary fixing between the steel plates 2 before welding will be described in detail. Here, the case where the steel plates 2 adjacent to the left and right are temporarily fixed will be described as an example. First, by adjusting the screwing depth of the locking member 15 into the screw holes 11a of the angles 10A and 10B, the distance D between the first piece 11 and the projection 15b of the locking member 15 (FIGS. 4 and 5). ) Is made substantially equal to the thickness of the steel plate 2 (an interval obtained by adding a slight clearance to this thickness). Here, the convex portion 15b faces the second piece 12.
[0014]
Next, the angles 10 </ b> A and 10 </ b> B are set in the vicinity (edge) of the side edge 2 c of the adjacent steel plate 2, respectively. To explain the angle 10A, first, as shown in FIG. 6, the locking member 15 is passed through a locking hole 2h formed near the side edge 2c of the steel plate 2, and the first piece 11 is placed on the front side of the steel plate 2. After hitting the surface, the angle 10A is moved toward the side edge 2c as shown by the arrow. Thereby, as shown in FIG. 7 and FIG. 8, a part of the periphery of the locking hole 2 h of the steel plate 2 between the projection 15 b of the locking member 15 and the first piece 11 (the right part in the drawing). Enters. In other words, the protrusions 15 b are arranged along the back surface of the steel plate 2. Thereby, the angle 10 </ b> A is locked to the steel plate 2. Similarly, the angle 10 </ b> B is also locked to the steel plate 2. In addition, since the convex part 15b of the locking member 15 protrudes only in one direction from the shaft part 15a, the locking member 15 can pass through even if the locking hole 2h is relatively small.
[0015]
In the set state of the angles 10A, 10B, the second pieces 12 are orthogonal to the steel plate 2 and face each other. Next, the bolt 20 is passed through the insertion hole 12a of the second piece 12 of the angle 10B, and screwed into the nut 30 from the insertion hole 12a of the second piece 12 of the angle 10A. As shown in FIG. 3, a back plate 40 is fixed to the back surface of the upper edge 2a and the left side edge 2c of the steel plate 2, and as shown in FIG. Is positioned in advance so as to hit the back surface of the.
[0016]
Next, the screwing of the bolt 20 is advanced, and the bolt is tightened until the side edge 2c of the adjacent steel plate 2 sandwiches the spacer 50. Thus, the temporary fixing is completed. Next, welding is performed by pouring the weld metal 60 into a groove formed by the back plate 40 and the side edge 2c of the adjacent steel plate 2. At the time of welding, the spacer 50 is removed immediately before.
[0017]
After the welding is completed, the bolt 30 is loosened and extracted from the angles 10A, 10B. Thereafter, the locking members 15 are matched with the locking holes 2h by moving the angles 10A and 10B along the steel plate 2 in a direction away from the corresponding side edge 2c of the steel plate 2, and further, the angles 10A and 10B are By moving the locking member 15 in the direction perpendicular to the direction 2, the locking member 15 can be pulled out from the locking hole 2h. In this way, the angles 10A and 10B can be easily removed from the steel plate 2, and no scratches occur.
[0018]
Even when the upper edge 2a and the lower edge 2b of the steel plate 2 vertically adjacent to each other are temporarily fixed, a temporary fixing device similar to that described above and the locking holes 2h formed near these edges 2a and 2b are used. A stop is made.
[0019]
The nut 30 may be separated from the angle 10A. Further, a screw hole may be formed in the second piece of the angle 10A to constitute a nut means.
In the case of a pier having a square cross section, a tube having a square cross section is correspondingly constructed as a shield.
It can be applied not only to piers but also to reinforcement of other architectural structures. For example, an apparatus that temporarily welds steel plates to each other in a process of building a flat shield by welding a number of flat steel plates so as to cover a wall of a building and filling a filler between the wall and the shield. Also applicable to
The locking member (locking portion) may be replaced with a general bolt. In this case, the head portion of the bolt protrudes in all directions from the shaft portion to form a convex portion.
A locking portion may be provided integrally with the first piece of the angle.
[0020]
【The invention's effect】
As described above, according to the first aspect of the present invention, it is possible to easily perform attachment and detachment by utilizing the locking action between the locking hole formed in the steel plate and the locking member of the angle, Further, no damage is left on the steel plate after the angle is removed, and the work for removing the damage is not required. As a result, it is possible to significantly reduce the work load required for temporarily fixing the steel plate.
According to the invention of claim 2, by screwing the shaft portion of the locking member into the screw hole of the steel plate, the interval between the projection of the locking member and the steel plate can be adjusted according to the thickness of the steel plate, thereby ensuring reliable operation. A good locking state can be obtained. In addition, it is not necessary to prepare an angle for each thickness of the steel sheet, so that equipment costs can be reduced.
According to the third aspect of the present invention, since the projection of the locking member projects only in one direction from the shaft, the locking member can be passed through the locking hole even if the locking hole of the steel plate is relatively small. The strength of the peripheral portion of the steel sheet is not reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing a reinforced pier.
FIG. 2 is a transverse sectional view taken along line II-II in FIG.
FIG. 3 is a development view of a steel plate used for reinforcing a pier.
FIG. 4 is a plan view showing one angle and a nut of the temporary fixing device according to the present invention.
FIG. 5 is a plan view showing another angle and a bolt of the temporary fixing device.
FIG. 6 is a front view showing a state in which the locking member of the one angle is inserted into a locking hole of a steel plate.
7 is a front view showing a state in which the one angle is moved from the state shown in FIG. 6 and the locking member is locked in the locking hole of the steel plate.
FIG. 8 is a cross-sectional view showing a state where a pair of angles locked to an adjacent steel plate are connected by bolts and nuts.
FIG. 9 is a cross-sectional view showing a state in which the bolts are deepened from the state of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bridge pier 2 Steel plate 2h Locking hole 3 Gap 4 Filler 10A, 10B Angle 11 First piece 11a Screw hole 12 Second piece 12a Insertion hole 15 Locking member 15a Shaft 15b Convex part 20 Bolt 30 Nut (nut means)
X tube (shield)

Claims (3)

In the step of reinforcing the building structure by welding a large number of steel plates to each other to construct a shield covering the building structure and filling a filler between the building structure and the shield, A device for temporarily fixing steel plates before welding them to each other,
A pair of angles, and a bolt and nut means for tightening the pair of angles so as to approach each other,
Each angle has a first piece, a second piece extending in a direction orthogonal to the first piece and through which the bolt is inserted, and a locking portion provided on the first piece,
The locking portion includes a shaft portion orthogonal to the first piece and extending to the opposite side of the second piece, and a protrusion projecting from the shaft portion in parallel with the first piece,
When the steel plates are temporarily fixed to each other, the first pieces of the pair of angles are respectively arranged along the front surface of the peripheral portion of the adjacent steel sheet, and the second pieces of the pair of angles are arranged to face each other. The shaft of the locking portion of each angle is inserted into the locking hole formed in the peripheral portion of the steel plate, and the convex portion of the locking portion is arranged along the back surface of the steel plate. Temporary fixing device for steel plates for reinforcing building structures. The building structure according to claim 1, wherein a screw hole is formed in the first piece, and a male screw that is screwed into the screw hole is formed in a shaft portion of the locking portion. Temporary fixing device for steel plate for material reinforcement. The temporary fixing device for a steel plate for reinforcing a building structure according to claim 1, wherein the projection of the locking portion protrudes only in a direction from a shaft portion toward an edge of the steel plate.

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