JP6074232B2 - Steel plate dowel and method for manufacturing steel plate dowel - Google Patents

Description

  The present invention relates to a steel plate gibber used for a joint portion between a concrete member and a steel material, and a manufacturing method thereof.

2. Description of the Related Art Conventionally, for example, a perforated steel plate gibber is used in a joint portion between a concrete member such as a reinforced concrete member (RC member) and a steel material such as a steel frame member in order to suppress deviation or opening between the two. A perforated steel plate gibber is generally configured by forming a plurality of circular holes in one rectangular steel plate. The plurality of circular holes are formed in series at intervals, for example, along the extending direction (long side direction) of the steel plate. The perforated steel plate gibber is buried in a concrete member with one end on the long side attached to the steel material by welding. Here, the perforated steel plate gibber is attached to the steel plate so that its extending direction is along the direction in which the above-described deviation occurs (direction in which the shearing force acts). In the perforated steel plate gibber, the gap between the concrete member and the steel material and the opening are suppressed by the concrete filled in the circular hole.
In addition, the perforated steel plate gibber as described above is disclosed in Patent Document 1.

JP 2002-70227 A

However, since a hole is formed in a steel plate at the time of manufacture of the perforated steel plate gibber as described above, the hole portion becomes a remaining material of the steel plate.
Moreover, when using a perforated steel plate dowel at the joint between the reinforced concrete member and the steel material, the joining force of the joint is increased by passing the rebar through the hole in the perforated steel plate gibel.
In this regard, if the joint is an open joint, the work of passing the rebar through the hole in the perforated steel plate can be performed relatively smoothly. It is difficult to secure a space for reinforcing bars to pass the reinforcing bars, and therefore it is difficult to pass the reinforcing bars through the hole.
In view of such a situation, the present invention suppresses the generation of residual materials during the manufacturing of the gibber, and
An object is to enable easy arrangement of reinforcing bars at complicated joints.

Therefore , in the first aspect of the present invention , the steel plate dowel used for the joint portion between the concrete member and the steel material has a rectangular plate shape, and a base portion on which one long side is fixed to the steel material, and the base portion A plurality of convex portions that extend outward from the other long side end portion and are formed at intervals in the long side direction of the base portion. The convex part is a plate-like gibber neck part that one side is continuous with the other long side end part of the base part and constitutes the base end side part of the convex part, and one side is a convex part that is continuous with the other side of the diver neck part. And a plate-like gibber head that constitutes the tip side portion. The maximum length in the long side direction of the gibber head is longer than the minimum length in the long side direction of the gibble neck. When viewed from the end of one long side of the base, the above-mentioned long side direction of the base and the extending direction of the dowel head intersect with the base of the base via the gibble neck. And can be rotated.
In the second aspect of the present invention, the steel plate dowel used for the joint portion between the concrete member and the steel material has a rectangular plate shape, and a base portion whose one long side is fixed to the steel material, and the other of the base portions. And a plurality of convex portions that are respectively extended outward from the end portion on the long side of the base portion and are spaced apart from each other in the long side direction of the base portion. The convex part is a plate-like gibber neck part that one side is continuous with the other long side end part of the base part and constitutes the base end side part of the convex part, and one side is a convex part that is continuous with the other side of the diver neck part. And a plate-like gibber head that constitutes the tip side portion. The maximum length in the long side direction of the gibber head is longer than the minimum length in the long side direction of the gibble neck. The concrete member is a reinforced concrete member including a reinforcing bar. It arrange | positions so that a reinforcing bar may be pinched | interposed between the edge part of the other long side of a base, and a dowel head.

In the third aspect of the present invention , as a method for producing two steel plate gibels from one rectangular steel plate, one end of the steel plate is used as one end of one long side of the base of the first steel plate gibel. The other end portion of the steel plate is defined as the end portion on one long side of the base portion of the second steel plate gibber, and the first steel plate gibber between one end portion and the other end portion of the steel plate. The contour line of the other long side of the base and the projected contour line of the convex portion and the contour line of the other long side of the base and the projected contour line of the second steel plate dowel are overlapped with each other. The contour outline is defined as a cutting line, and the steel plate is cut along the cutting line to separate the first and second steel plate gibbels from each other.

According to the first aspect and the second aspect of the present invention , the steel plate dowel includes a convex portion including a dowel head and a dowel neck. Accordingly, since the reinforcing bar can be inserted from the outside into the space between the adjacent dowel necks through the gap between the adjacent dowel heads, the reinforcing bar can be used even in a complicated joint. Can be easily arranged in the space between the convex portions (gibel necks).

According to the third aspect of the present invention , when two steel plate gibels are manufactured from one rectangular steel plate, the other long side end of the first steel plate gibel and the contour of the convex portion The planned line and the contour planned line of the other long side of the base in the second steel plate dowel and the contour planned line of the convex part are overlapped and matched with each other to define the contour planned line as a cutting line, The steel plate is cut along the cutting line to separate the first and second steel plate gibels from each other. Thereby, since the part between the convex parts of the 1st steel plate dowel is effectively utilized as the convex part of the 2nd steel plate dowel among steel plates, generation | occurrence | production of the remaining material of the steel plate at the time of steel plate divel manufacture is suppressed. be able to.

The figure which shows the junction part of the concrete member and steel materials in one Embodiment of this invention. Diagram showing the schematic configuration of a steel plate gibber The figure which shows the manufacturing method of the steel plate dowel The figure which shows the modification of the steel plate dowel The figure which shows the modification of the convex part of a steel plate dowel

Embodiments of the present invention will be described below with reference to the drawings.
In the following description, “one side” and “other side” of the present invention correspond to “lower side” and “upper side”, respectively, but correspondence relationship between “one side” and “other side” of the present invention. However, the present invention is not limited to this, and the “one side” may be the side opposite to the “other side”.

FIG. 1 is a perspective view showing a joint portion between a reinforced concrete member (concrete member) and an H-shaped steel (steel material). FIG. 2A is an enlarged view of part A of FIG. FIG. 2A is a cross-sectional view taken along the line BB in FIG.
In addition, in this embodiment, although a reinforced concrete member (RC member) comprised including a reinforcing bar is mentioned and demonstrated as a concrete member below, the structure of a concrete member is not restricted to this. In the present embodiment, an H-shaped steel will be described as a steel material, but the steel material is not limited to this.

A plurality of (three in the figure) H-section steels 10 arranged in parallel with each other on a horizontal plane are composed of an upper flange 11, a web 12, and a lower flange 13, respectively.
A rectangular parallelepiped RC member 20 is formed so as to cover these H-shaped steels 10 from above.
For the RC member 20, the steel bar dowel 30 is welded and fixed to the upper flange 11 of each H-section steel 10, and then a reinforcing bar 21 is disposed, and a formwork (not shown) is installed, and then concrete is driven. Formed by.

The steel plate gibber 30 is used for the joint portion 40 between the RC member 20 and the H-shaped steel 10, and as shown in FIGS. 2A and 2A, a rectangular plate-shaped base portion 31 having a thickness, And a plurality of convex portions 32. Here, the base part 31 and the convex part 32 are integrally formed with the same steel plate. In addition, about the base 31, the lower end part 311 respond | corresponds to the "end part of one long side" of this invention, and the upper end part 312 respond | corresponds to the "end part of the other long side" of this invention. To do.
The lower end portion 311 of the base portion 31 is fixed to the upper flange 11 of the H-section steel 10 by welding 33. About this welding, automation of welding operation is realizable by adopting submerged arc welding, for example.

The plurality of convex portions 32 extend upward (outward) from the upper end portion 312 of the base portion 31, and are formed at intervals in the long side direction (extending direction) P of the base portion 31. In the present embodiment, the plurality of convex portions 32 are formed at equal intervals along the long side direction P.
The convex portion 32 includes a plate-like gibel neck portion 34 having the same thickness as the base portion 31 and a plate-like dibel head portion 35 having the same thickness as the base portion 31.
The lower side of the gibble neck 34 is connected to the upper end 312 of the base 31 and constitutes the base end side portion of the convex portion 32.
The lower side of the gibble head 35 is continuous with the upper side of the gibber neck 34 and constitutes the tip side portion of the convex part 32.

The gibber neck 34 has a drum shape.
A space 36 formed between the dowel neck portions 34 adjacent in the long side direction P has a long hole shape.
The gibble head 35 has a shape corresponding to the shape of the long hole of the space 36, that is, a shape in which a semicircle is added to each of the short-side ends of the rectangle.
A gap 37 formed between the dowel heads 35 adjacent in the long side direction P has a drum shape corresponding to the dowel neck 34.
Therefore, the dowel head 35 has a shape corresponding to the long hole shape so as to close the gap between the dowel neck portions 34 adjacent in the long side direction P. Further, the dowel neck 34 has a drum shape that closes between the dowel heads 35 adjacent in the long side direction P.
Further, as shown in FIG. 2A, the convex portion 32 composed of the dowel neck portion 34 and the dowel head portion 35 has a shape symmetrical with respect to a vertical line Q1 extending in the vertical direction at the center thereof.

The maximum length L <b> 1 of the long side direction P of the gibber head 35 is longer than the minimum length L <b> 2 of the long side direction P of the gibble neck 34. Thus, a space 36 is defined between the adjacent convex portions 32 by the lower end portion of the dowel head portion 35, the side portion of the dowel neck portion 34, and the upper end portion 312 of the base portion 31. In this space 36, as in the case of the circular hole in the above-described perforated steel plate dowel, the gap and opening between the RC member 20 and the H-section steel 10 are suppressed by the concrete filled in the space 36.
In order to arrange the reinforcing bar 21 between the upper end 312 of the base 31 and the dowel head 35 (that is, the space 36), the minimum distance L3 between the dowel heads 35 (the minimum distance of the gap 37) is the outer diameter of the reinforcing bar 21. to be greater than D, also, the distance (i.e. the height of the dowel neck 3 4) between the upper portion 312 and the dowel head 35 of the base 31 L4 so that is larger than the outer diameter D of the reinforcing bars 21 In addition, a plurality of convex portions 32 are formed.
By arranging the reinforcing bar 21 between the upper end portion 312 of the base portion 31 and the dowel head portion 35, the joining force of the joint portion 40 between the RC member 20 and the H-section steel 10 increases.

The maximum length L1 in the long side direction P of the dowel head 35 is equal to the maximum distance between the dowel neck portions 34 (the maximum distance of the space 36) L5.
The minimum length L2 in the long side direction P of the dowel neck 34 is equal to the minimum distance (minimum distance of the gap 37) L3 between the dowel heads 35.
A distance L4 between the upper end 312 of the base 31 and the dowel head 35 (the height of the dowel neck 34) L4 is equal to the height L6 of the dowel head 35.
The contour line E of the upper end portion 312 of the base 31 and the convex portion 32 in the steel plate diver 30 is a point-symmetrical curve with the point R shown in FIG.
Here, the point R is a point where the vertical line Q2 and the horizontal line S intersect. The vertical line Q2 extends in the vertical direction between the above-described vertical line Q1 and the vertical line Q3 extending in the vertical direction at the center of the space 36, and is separated from each of the vertical lines Q1 and Q3 by the same distance. . The horizontal line S is located on the boundary line between the dowel head 35 and the dowel neck 34.
In addition, about the shape of each component of the steel plate gibble 30, and each said dimension (L1-L6), according to the shift | offset | difference resistance force of the steel plate gibble 30 requested | required, the jible head 35 and the gibber neck part 34 are shown. It is set appropriately according to the shearing force acting on the.

Next, a method for manufacturing a steel plate gibber will be described with reference to FIG.
FIG. 3 shows a method of manufacturing two steel plate gibbels 30 a and 30 b from one rectangular steel plate 50.
Here, about the 1st steel plate dowel 30a and the 2nd steel plate dowel 30b, since each structure is the same as that of the above-mentioned steel plate dowel 30, the description is abbreviate | omitted. The constituent elements corresponding to the first steel plate dowel 30a will be described with the suffix “a”, and the constituent elements corresponding to the second steel plate dowel 30b will be appended with the suffix “b”. I will explain.

First, as shown in FIG. 3A, one end portion 51 of the steel plate 50 is defined as the lower end portion 311a of the base portion 31a in the first steel plate dowel 30a, and the other end portion 52 of the steel plate 50 is defined as the second end portion 52a. The lower end portion 311b of the base portion 31b of the steel plate dowel 30b is defined.
Next, a cutting line F is defined between the one end 51 and the other end 52 of the steel plate 50.
The cutting lines F are the contour outlines Ga of the upper end 312a and the protrusion 32a of the base 31a in the first steel plate diver 30a, and the contour outlines of the upper end 312b and the protrusion 32b of the base 31b in the second steel plate divel 30b. It agrees with Gb. That is, the cutting line F is defined by overlapping the contour outlines Ga and Gb with each other so as to coincide with each other. Here, the contour outlines Ga and Gb and the cutting line F are point-symmetric curves with the point R described above as a symmetric point (a center of symmetry). Further, the space 36a and the gap 37a of the first steel plate dowel 30a are closed by the gibble head 35b and the gibble neck 34b of the second steel plate gibble 30b, in other words, the space 36b of the second steel plate dowel 30b and The projecting portion 32a of the first steel plate gibble 30a and the projecting portion 32b of the second steel plate gibble 30b are connected to the steel plate 50 so that the gap 37b is closed by the gibble head 35a and the gibble neck portion 34a of the first steel plate gibble 30a. Are alternately located along the extending direction (the long side direction P described above).

Next, the steel plate 50 is cut along the cutting line F (see FIG. 3 (A)). By this cutting, the contour line Ea of the upper end portion 312a and the convex portion 32a of the base portion 31a in the first steel plate diver 30a, and the contour line Eb of the upper end portion 312b and the convex portion 32b of the base portion 31b in the second steel plate divel 30b. It is formed. In the cutting process of the steel plate 50, since it can be continuously cut with a laser or the like, the cutting operation can be automated, and consequently the cutting operation can be performed efficiently.
Next, the first steel plate dowel 30a and the second steel plate dowel 30b are separated from each other.
In this manner, two steel plate dowels 30 a and 30 b are manufactured from one steel plate 50.

FIG. 4A is a plan view of the above-described steel plate dowel 30, and FIG. 4A is a plan view showing a modified example (steel plate divel 30 c) of the steel plate dowel 30. In addition, about the component corresponding to the steel plate dowel 30c, the subscript "c" is attached and demonstrated.
Differences between the steel plate gibble 30 and the steel plate gibble 30c will be described.

  In the steel plate dowel 30 shown in FIG. 4 (a), the base 31, the dowel neck 34, and the dowel head 35 are formed flush with each other when viewed from above or below, but the steel plate dowel shown in FIG. In 30c, when viewed from above or below, the long side direction Pc of the base 31c and the extending direction Tc of the dowel head 35c intersect at an angle of 90 °. In this way, in the steel plate gibber 30c, when viewed from above or below, the dowel head 35c is placed on the dowel neck 34c so that the long side direction Pc of the base 31c intersects the extending direction Tc of the dowel head 35c. It can rotate with respect to the base 31c via. The rotation angle can be appropriately adjusted according to the stress state of the joint 40 so that, for example, the shear strength required by the joint 40 can be obtained.

FIG. 5 shows a modification of the convex portion 32 of the steel plate dowel 30.
In the embodiment described above, the gibble neck 34 has a drum shape corresponding to the gap 37, and the gibble head 35 has a shape corresponding to the long hole shape of the space 36. The shape is not limited to this.
For example, as shown in FIG. 5A, the dowel neck 34 may have a rectangular shape corresponding to the gap 37, and the dowel head 35 may have a rectangular shape corresponding to the space 36.
Further, as shown in FIG. 5 (a), the convex portion 32 may be integrally formed so that the dowel neck portion 34 and the dowel head portion 35 are smoothly continuous. In this case, for example, the convex portion 32 can be formed in a wedge shape so that the length in the long side direction P increases from the lower side toward the upper side. In this case, the gap 37 and the space 36 can be formed in a wedge shape so that the length in the long side direction P becomes longer from the upper side toward the lower side corresponding to the convex portion 32.

5 (a) and 5 (a), the contour line E of the upper end portion 312 of the base 31 and the convex portion 32 in the steel plate dowel 30 is a point-symmetrical curve having the point R as a symmetric point (symmetric center). Can be.
Needless to say, the steel plate dowel 30 shown in FIGS. 5A and 5A can also be manufactured from one steel plate 50 as in FIG.

  According to this embodiment, the steel plate gibbel 30 used for the joint part 40 of the RC member 20 (concrete member) and the H-shaped steel 10 (steel material) has a rectangular plate shape and has a lower end 311 (one long side side). The end portion of the base portion 31 is welded and fixed to the upper flange 11 of the H-shaped steel 10, and the upper end portion 312 (the end portion on the other long side) of the base portion 31 is extended upward (outward). And a plurality of convex portions 32 formed at intervals in the long side direction P of the base portion 31. The convex part 32 has a plate-like gibber neck part 34 whose lower side (one side) is continuous with the upper end part 312 of the base part 31 and constitutes the base side part of the convex part 32, and the lower side (one side) is the gibber neck part. And a plate-like dowel head 35 that constitutes the tip side portion of the convex portion 32 continuously from the upper side (the other side) of 34. The maximum length L1 in the long side direction P of the gibble head 35 is longer than the minimum length L2 in the long side direction P of the gibble neck 34. As a result, a space 36 is defined between the adjacent convex portions 32 by the lower end portion of the dowel head portion 35, the side portion of the dowel neck portion 34, and the upper end portion 312 of the base portion 31. Deviation and opening between the RC member 20 and the H-section steel 10 can be suppressed by the filled concrete.

  Further, according to the present embodiment, the concrete member is an RC member (reinforced concrete member) 20 including the reinforcing bars 21, and the minimum distance (gap between the adjacent bevel heads 35 in the long side direction P is described. 37) is smaller than the outer diameter D of the reinforcing bar 21 arranged between the upper end 312 (the other long side end) of the base 31 and the dowel head 35. Thereby, since the reinforcing bar 21 can be inserted into the space 36 between the gibel neck portions 34 from above the steel plate gibel 30 via the gap 37 between the gibel head portions 35, The rebar 21 can be easily arranged in the space 36.

  Further, according to the present embodiment, the dowel head 35 has a shape (long hole shape) that closes between the dowel neck portions 34 adjacent in the long side direction P, and the dowel neck portion 34 has the long side direction. P forms a shape (drum shape) that closes between adjacent Giber heads 35. Thereby, when manufacturing the two steel plate dowels 30 from one steel plate 50, the upper end portion 312 of the base 31 and the contour lines of the convex portions 32 in each steel plate dowel 30 are overlapped and matched with each other. Since the cutting line F can be defined, only the steel plate 50 is cut along the cutting line F, so that the two steel plate gibels 30 can be efficiently manufactured.

  Further, according to the present embodiment, the long side direction Pc of the base portion 31c and the extending direction Tc of the dowel head 35c intersect each other when viewed from below (the end portion on one long side) or above the base portion 31c. In this way, the gibber head 35c can be rotated with respect to the base 31c via the gibble neck 34c. Thereby, even if it is a case where the long side direction Pc of the base 31 and the action direction of the shearing force which should be endured with the steel plate divel 30c have shifted, according to the shift | offset | difference, the divel head 35c can be rotated suitably. Therefore, good shear strength can be obtained at the joint 40.

  Moreover, according to this embodiment, as a method of manufacturing the two steel plate dowels 30a and 30b from one rectangular steel plate 50, the one end 51 of the steel plate 50 is used as the lower end of the base 31a of the first steel plate dowel 30a. The portion 311a (one end on one long side) is defined, and the other end 52 of the steel plate 50 is defined as the lower end 311b (one end on one long side) of the base 31b in the second steel plate gibber 30b. And between the one end part 51 and the other end part 52 in the steel plate 50, the upper end part 312a (end part of the other long side) of the base 31a in the 1st steel plate gibber 30a and the contour outline of the convex part 32a Ga and the contour outline Gb of the upper end 312b (the end portion on the other long side) of the base 31b and the projection 32b of the second steel plate dowel 30b are overlapped and matched with each other, and the contour outline With cutting line F Provisions Te and, by cutting the steel plate 50 along the cutting line F, to separate the first and second steel plates dowels 30a, 30b from each other. Thereby, since the part between the convex parts 32a of the 1st steel plate dowel 30a is effectively utilized as the convex part 32b of the 2nd steel plate dowel 30b among the steel plates 50, the remaining of the steel plate 50 at the time of steel plate dowel production is obtained. Generation of materials can be suppressed.

  In addition, in this embodiment, although the reinforced concrete member (RC member) comprised including a reinforcing bar was mentioned and demonstrated as a concrete member, the structure of a concrete member is not restricted to this, For example, it is a concrete member which does not contain a reinforcing bar. It may also be a prestressed concrete member (PC member) configured to include a piano wire or the like.

  Moreover, in this embodiment, although H-shaped steel was mentioned and demonstrated as steel materials, steel materials are not restricted to this, For example, a steel plate, a flat steel, a corrugated steel web, an I-shaped steel, and a steel plate are assembled in square box shape. It may be a box pillar that is a pillar. In a steel plate, a flat steel, and a corrugated steel web, the steel plate dowel according to the present invention can be attached so as to protrude outward from the surface or from the end portion. Further, in the I-shaped steel, the steel plate gibel according to the present invention can be attached to the flange portion, similarly to the above-described H-shaped steel. Moreover, in the box column, the steel plate dowel which concerns on this invention can be attached to the side surface.

  The illustrated embodiments are merely examples of the present invention, and the present invention is not limited to those directly described by the described embodiments, and various improvements and modifications made by those skilled in the art within the scope of the claims. Needless to say, it encompasses changes.

10 H section steel (steel)
11 Upper flange 12 Web 13 Lower flange 20 RC member (concrete member)
21 Reinforcing bars 30, 30a, 30b, 30c Steel plate dowels 31, 31a, 31b, 31c Base portions 32, 32a, 32b, 32c Convex portions 33 Welding 34, 34a, 34b, 34c Dibel neck portions 35, 35a, 35b, 35c Dowel head portions 36 36a, 36b Space 37, 37a, 37b Gap 40 Joint 50 Steel plate 51 One end 52 Other end 311 Lower end 312 Upper end E, Ea, Eb Contour line F Cutting line Ga, Gb Contour line P, Pc Long side Direction Q1, Q2, Q3 Vertical line R Symmetry point (target center)
S Horizontal line Tc Extension direction

Claims (6)

A steel plate dowel used for a joint between a concrete member and a steel material,
A rectangular plate shape, one long side end is fixed to the steel base,
A plurality of protrusions extending outward from the other long side end of the base, and spaced apart from each other in the long side direction of the base;
Comprising
The convex part has a plate-like gibber neck part that one side is connected to the end part on the other long side of the base part and constitutes a base end side part of the convex part, and one side is on the other side of the gibber neck part. A plate-like gibber head that continuously forms the tip side portion of the convex part, and
The dowel head, the maximum length of the the long side direction, rather long than the long side direction of the minimum length of the dowel neck,
When viewed from the end of the one long side of the base, the long side direction of the base and the extending direction of the dowel head cross each other. A steel plate gibber that is rotatable with respect to the base . The concrete member is a reinforced concrete member including a reinforcing bar,
The minimum distance between the dowel head adjacent in the long side direction, than an outer diameter of the reinforcing bar is disposed between the other long side of the end portion and the dowel head of the base The steel plate gibber according to claim 1, which is large. A steel plate dowel used for a joint between a concrete member and a steel material,
A rectangular plate shape, one long side end is fixed to the steel base,
A plurality of protrusions extending outward from the other long side end of the base, and spaced apart from each other in the long side direction of the base;
Comprising
The convex part has a plate-like gibber neck part that one side is connected to the end part on the other long side of the base part and constitutes a base end side part of the convex part, and one side is on the other side of the gibber neck part. A plate-like gibber head that continuously forms the tip side portion of the convex part, and
The dowel head, the maximum length of the the long side direction, rather long than the long side direction of the minimum length of the dowel neck,
The concrete member is a reinforced concrete member including a reinforcing bar,
A steel plate gibber, wherein the reinforcing bar is disposed so as to be sandwiched between an end of the other long side of the base and the gibber head . The minimum distance between the dowel head adjacent the previous Kichohen direction, than the outer diameter of the reinforcing bar is disposed between the other long side of the end portion and the dowel head of the base The steel plate gibber according to claim 3 , wherein The dowel head has a shape that closes between the dowel necks adjacent in the long side direction,
The steel plate dowel according to any one of claims 1 to 4, wherein the dowel neck has a shape that closes between the dowel heads adjacent in the long side direction. A method for producing two steel plate gibbels according to any one of claims 1 to 5 from one rectangular steel plate,
One end portion of the steel plate is defined as an end portion on one long side of the base in the first steel plate gibber,
The other end portion of the steel plate is defined as an end portion on one long side of the base portion in a second steel plate gibber,
Between the one end portion and the other end portion of the steel plate, an end portion on the other long side of the base portion and a projected contour line of the convex portion in the first steel plate gibber, and the second steel plate The end of the other long side of the base portion in the dowel and the contour outline of the convex portion are overlapped and matched with each other to define the contour outline as a cutting line,
A method of manufacturing a steel plate diver, comprising cutting the steel plate along the cutting line to separate the first and second steel plate gibels from each other.