JP2022158196A - Joint plate with groove, and steel material joint structure - Google Patents

Abstract

To provide a joint plate with grooves capable of obtaining high slide coefficient even in joining steel materials having a coating film with each other, and a steel material joint structure using the same.SOLUTION: Tips of protrusions 13 are made to bite a web by sandwiching a joint plate 100 with grooves from both surfaces of the web and fastening the same with a high strength bolt 101. Even though a tensile force is generated in a joint portion of H-shaped steels 200 with each other, the joint plate 100 with grooves is hard to slide from the H-shaped steel 200, and the H-shaped steels 200 are securely joined to each other. Especially, a coating film 201 is formed on a surface of the H-shaped steel 200 used outdoors. Here, a height H1 of the protrusion 13 is higher than a thickness F of the coating film 201 (the height of the protrusion 13 is described later). Thus, the protrusion 13 can be made to penetrate the coating film 201 and the tips of the protrusions 13 can be made to bite the surface of the H-shaped steel 200.SELECTED DRAWING: Figure 2

Description

TECHNICAL FIELD The present invention relates to a grooved joint plate and a steel material joint structure for connecting, for example, H-section steels.

Steel materials such as H-section steel are sometimes joined together by high-strength bolt friction joining using a splice plate. In this case, the splice plate is arranged along both steel materials and fastened to both steel materials using high-strength bolts, nuts, or the like.

Such a joint by high-strength bolt friction welding is configured to secure its proof strength by the axial force introduced to the high-strength bolt, the slip coefficient of the friction surface between the splice plate and the steel material, and the number of friction surfaces.

Therefore, the surface of the splice plate in contact with the steel material is red rusted or shot blasted to ensure a predetermined slip coefficient (for example, 0.45 according to the Architectural Institute of Japan's Architectural Standard Specifications JASS6). ing.

However, due to the recent increase in tensile strength and increase in cross-section of steel materials, the yield strength required for joints tends to increase. Therefore, it is possible to increase the number of high-strength bolts to improve the yield strength, but there is a problem that the cost and the number of man-hours increase.

On the other hand, if the slip coefficient of the friction surface is improved, it is possible not only to suppress the increase in the number of high-strength bolts, but also to further reduce the number in some cases. Patent Literatures 1 and 2 describe an example of a grooved splice plate in which substantially triangular projections are provided at a predetermined pitch in order to improve the slip coefficient.

Patent No. 2936455 Patent No. 3569758

Such a joint structure between steel materials is also used in bridges and the like. In this case, the steel materials to be joined are often coated with a paint film or the like. However, the coating may not ensure a sufficient coefficient of slip between the splice plate and the steel. Therefore, splice plates are typically installed with the coating removed with a power tool to expose the bare substrate.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a grooved joining plate that can obtain a high slip coefficient without removing the coating, and a steel joining structure using the same.

A first invention for solving the above-mentioned problems is a grooved joining plate for joining steel materials having a film formed thereon, wherein a plurality of protrusions and the protrusions are provided on at least one surface of a plate member. and a groove formed between the joint plates, wherein the height of the protrusion is higher than the thickness of the coating, and the coating can be penetrated by the protrusion. is.

The protrusion and the groove may be formed on both surfaces of the grooved joining plate. Alternatively, the projections and grooves may be formed only on one surface of the grooved joining plate, and the other surface may be coated with a paint having a high slip coefficient such as inorganic zinc-rich paint.

The distance between the protrusions may be different on each surface of the grooved joining plate.

The groove may have first grooves parallel to each other and second grooves formed in a direction different from that of the first grooves.

In this case, it is desirable that the angle formed by the first groove and the second groove is 1 to 90 degrees. Further, it is preferable that the ratio of the interval between the first grooves and the interval between the second grooves is 1:1 to 1:999.

It is desirable that at least one surface of the grooved joining plate is surface-treated, and that the Vickers hardness of the one surface is at least twice the Vickers hardness of the protrusion-forming surface of the raw material before treatment.

According to the first aspect of the invention, when joining steel materials on which a coating is formed, the height of the protrusions of the grooved joining plate is higher than the thickness of the coating, so that the protrusions penetrate the coating, It is possible to make the tip of the protrusion bite into the steel material. Therefore, even with a steel material having a film, it is possible to secure a sufficient coefficient of slip between the grooved joint plate and the steel material.

At this time, since there is no need to remove the film, the work can be simplified, and even if the existing film contains harmful substances such as lead and PCB, the removal process can be reduced. It is possible to suppress the scattering of harmful substances and the effect on workers. Moreover, the slip coefficient can be ensured regardless of the surface condition of the existing substrate.

Moreover, if the protrusions and grooves are formed on both sides of the grooved joining plate, either of the two sides can be used to join the steel materials together. Moreover, when a clamping member that clamps the grooved joint plate from the outside is used, the grooved joint plate can be made to bite into both the clamping member and the steel material for joining.

At this time, by making the distance between the protrusions on each surface of the grooved joining plate different, the grooved joining plate is formed in the shape of the protrusions suitable for the member to be joined between the sandwiching member and the steel material. It can be joined by biting into both the clamping member and the steel material.

Further, if the groove portion is composed of the first groove portion parallel to each other and the second groove portion formed in a direction different from that of the first groove portion, the protrusion and the groove portion are repeated in at least two directions. It is formed. Therefore, a high slip coefficient can be obtained not only in the tensile direction of the steel materials but also in the shear direction of the steel materials.

In particular, if the angle formed by the first groove and the second groove is within a predetermined range, the coefficient of slip in different directions can be increased. Further, by setting the ratio of the interval between the first grooves to the interval between the second grooves within a predetermined range, it is possible to secure an appropriate slip coefficient in each direction.

In addition, the surface of the grooved joining plate on which the protrusions are formed is surface-treated so that the hardness after treatment is at least twice the hardness of the steel material before treatment. It is possible to achieve both workability during operation and rigidity of the projection during use. The Vickers hardness before treatment can be measured, for example, by a cross section of the grooved joining plate.

A second aspect of the invention comprises a pair of steel materials having a coating on the surface and having their ends butted against each other, and a grooved joint plate fixed so as to straddle the steel materials, wherein the grooved joint The plate has a plurality of protrusions and grooves formed between the protrusions on at least one surface, the height of the protrusions is higher than the thickness of the coating, and the protrusions are formed on the coating. and the tip of the protrusion bites into the steel material.

According to the second invention, it is possible to obtain a steel material joining structure capable of reliably joining steel materials with a high slip coefficient.

A third aspect of the present invention is a first steel material having a coating on its surface, a second steel material that is joined to the first steel material, and a steel material that is disposed between the first steel material and the second steel material. a joint plate with grooves, wherein the joint plate with grooves has, on at least one surface thereof, a plurality of protrusions and grooves formed between the protrusions, and the height of the protrusions is The steel material joining structure is characterized in that the protrusion is higher than the thickness of the coating and penetrates the coating.

According to the third invention, it is possible to efficiently join not only the butted portions of the steel materials but also the joining of the other steel materials to the steel materials.

According to the present invention, it is possible to provide a grooved joint plate that can obtain a high slip coefficient without removing the coating, and a steel material joint structure using the same.

(a) and (b) are perspective views showing a grooved joint plate 100. FIG. (a) is a diagram showing a steel material joining structure 300 using the grooved joining plate 100, (b) is a cross-sectional view of the joint, and (c) is an enlarged view of part E of (b). (a) is a view showing a cross section in the thickness direction of the grooved joining plate 100, and (b) is an enlarged view of part A of (a). 4(a), (b), and (c) are diagrams showing a state in which the grooved joint plate 100 is fixed to the holding member 120. FIG. FIG. 3 is a view showing a steel material joining structure 300a using a holding member 120 and a joining plate 100 with grooves; (a) and (b) are diagrams showing a grooved joining plate 100a. FIG. 3 is a view showing a steel material joining structure 300b using a clamping member 120 and a joining plate 100a with grooves; FIG. 4 is a perspective view showing a grooved joining plate 100b; (a) is a partial plan view of a grooved joining plate 100b, and (b) is a diagram showing another embodiment of (a). The figure which shows the state which changed the direction of groove part 11a, 11b with respect to Fig.9 (a). The figure which shows the state which changed the angle of groove part 11a, 11b with respect to FIG. FIG. 2 is a plan view showing a grooved joining plate 100e; FIG. 3 is a perspective view showing a grooved joining plate 100c; Sectional drawing of the joint part in the steel material joining structure 300c using the grooved joint board 100c. Sectional drawing of the joint part in 300 d of steel material joining structures using the grooved joint board 100. FIG.

[First Embodiment]
Preferred embodiments of the present invention will be described in detail below with reference to the drawings.

(Grooved joining plate 100)
FIGS. 1(a) and 1(b) are diagrams showing a grooved joint plate 100 according to a first embodiment of the present invention, and the two differ only in the formation direction of the protrusions 13 (grooves 11). The grooved joining plate 100 is a so-called splice plate, and is used, for example, for joining H-section steel webs, flanges, and the like.

A grooved joining plate 100, which is a plate-shaped member, has a plurality of protrusions 13 arranged in parallel on at least one surface in contact with an object to be joined. That is, the grooves 11 are formed in parallel between the adjacent protrusions 13 . Also, a plurality of through holes 12 are formed for passing high-strength bolts.

For example, in the example shown in FIG. 1B, the through holes 12 are arranged in two rows near both ends in the width direction (perpendicular to the formation direction of the projections 13) of the grooved joining plate 100. be done. At this time, the through-holes 12 may be aligned in the side-by-side direction of the protrusions 13 as shown in the figure, and the adjacent through-holes 12 may be aligned in the direction along the protrusions 13 (the direction perpendicular to the width direction). may be staggered with each other. By aligning the through holes 12 in the width direction, the length of the grooved joint plate 100 can be shortened, and by arranging the through holes 12 in a zigzag pattern, the width of the grooved joint plate 100 can be narrowed. can be done. Note that the number and arrangement of the through holes 12 are not limited to the illustrated example.

FIG. 2(a) is a diagram showing a steel material joining structure 300 in which steel materials to be joined are joined using the grooved joining plate 100, and FIG. 2(b) is a cross-sectional view of the joining portion. The grooved joining plate 100 is used, for example, when joining webs or flanges (hereinafter referred to as flanges, etc.) of H-shaped steel 200 (steel material) to be joined in a steel frame beam. The ends of a pair of H-section steels 200 are butted against each other, and the grooved joining plate 100 is arranged so as to straddle the flanges of the adjacent H-section steels 200, and high-strength bolts 101 and nuts 102 are attached to both flanges. etc. The grooved joining plate 100 used for web joining and the grooved joining plate 100 used for flange joining may differ in the direction in which the protrusions 13 are formed with respect to the direction in which the through holes 12 are formed.

Examples of the grooved joint plate 100 include rolled steel for general structure, rolled steel for building structure, rolled steel for welded structure, weather-resistant hot-rolled steel for welded structure, high yield point steel plate for bridges, and carbon steel for machine structure. A metal plate made of steel, alloy steel for machine structural use, or the like is used. In addition, the total thickness of the two grooved joint plates 100 that sandwich the steel material is set according to the thickness of the object to be welded. be.

Note that the grooved joining plate 100 shown in FIG. 1B is used, for example, for joining webs together. In this case, the formation direction of the grooves 11 (protrusions 13) is formed substantially perpendicular to the butting direction (that is, joining direction) of the H-shaped steels 200 . For this reason, by sandwiching the grooved joining plate 100 from both sides of the web and tightening the high-strength bolt 101, the tip of the protrusion 13 is bitten into the web, and as a result, a tensile force is applied to the joint between the H-section steels 200. Even if this occurs, the grooved joining plate 100 and the H-section steel 200 are unlikely to slip, and the H-section steels 200 can be reliably joined together.

Here, in some cases, the surface of the H-section steel 200, which is used especially outdoors, is provided with a coating. FIG. 2(c) is an enlarged view of part E in FIG. 2(b). As illustrated, in this embodiment, a coating 201 is formed on the surface of the H-section steel 200 . The film 201 is formed by coating, plating, thermal spraying, or the like, for example. In particular, when the film 201 is a coating film, it is effective for a coating film in which it is difficult to secure a slip coefficient of 0.4 or more in the civil engineering field and 0.45 or more in the construction field. Here, height H<b>1 of protrusion 13 (height of protrusion 13 will be described later) is higher than thickness F of coating 201 . For this reason, the protrusion 13 can be penetrated through the film 201 and the tip of the protrusion 13 can be bitten into the surface of the H-section steel 200 . In addition, when the coating 201 is a coating film, since the thickness of the coating 201 is generally about 500 μm, the height H1 of the protrusion 13 is preferably more than 500 μm.

Next, details of the protrusion 13 and the groove 11 of the joint plate 100 with groove will be described. FIG. 3(a) is a cross-sectional view of the grooved joining plate 100 in the thickness direction, and FIG. 3(b) is an enlarged view of part A in FIG. 3(a). As described above, the protrusions 13 and the grooves 11 are alternately formed on one surface of the grooved joining plate 100 (referred to as the protrusion-forming surface 111).

The protrusions 13 are approximately isosceles triangles (including equilateral triangles), and the distance between the tips of the protrusions 13 is L1 (see FIG. 3B). That is, the protrusions 13 and the grooves 11 are arranged at the equal pitch L1. The pitch L1 of the projections 13 is desirably about 0.1 mm to 3.0 mm, more desirably 0.5 mm to 2.0 mm.

The protrusion 13 is formed by a straight slope. It should be noted that the angle formed by the straight slopes forming the protrusion 13 is set to 60° to 120°. If the angle is too small, the rigidity of the protrusion 13 will be reduced. On the other hand, if the angle is too large, it becomes difficult to bite into the steel material, and the width of the protrusions 13 increases, so the number of protrusions 13 decreases and the coefficient of slip with respect to the steel material decreases.

Here, assuming that the base of the linear slope (for example, the change point of the inclination angle) constituting the protrusion 13 is a reference plane (B in the figure), the tip side (upper in the figure) of the reference plane B is the protrusion. 13 , and the groove portion 11 is located between the protrusions 13 and is closer to the base portion than the reference plane B (lower side in the drawing). That is, the groove portion 11 is not formed by the extension of the slope of the protrusion 13 but is formed at an angle different from the inclination angle of the protrusion 13 . Therefore, the groove 11 is the base of the slope of the projection 13 and is formed between the change points of the inclination angle. The groove portion 11 is formed in an arc shape as a whole with respect to the reference plane B, for example. It should be noted that the groove 11 does not have to be completely arc-shaped, and for example, may be formed in a polygonal shape in which a plurality of straight lines with different angles are continuous. That is, it is sufficient if the overall shape is approximately arcuate.

Here, assuming that the width of the groove 11 on the reference surface B is L2 (see FIG. 3B), L1 (protrusion pitch)/L2 (groove width) should be 2 or more and 10 or less. For example, if the tip angle of the protrusion 13 is constant and L1/L2 is less than 2, the width of the groove 11 becomes too wide and the number of protrusions 13 decreases, making it difficult to ensure a high slip coefficient. On the other hand, if the width of the groove portion 11 is constant and L1/L2 is less than 2, the protrusion 13 becomes too thin and sharp, and the rigidity of the protrusion 13 decreases. If the angle of the protrusion 13 is constant and L1/L2 is more than 10, the width of the groove 11 becomes too narrow, resulting in poor manufacturability and less effect of alleviating stress concentration in the groove 11 . On the other hand, if the width of the groove 11 is constant and L1/L2 exceeds 10, the number of projections 13 is reduced, making it difficult to ensure a high slip coefficient.

Further, as shown in FIG. 3B, when the height of the projection 13 from the reference plane B is H1 and the depth of the groove 11 from the reference plane B is H2, H1/H2 is 3. 15 or less. If H1/H2 is less than 3, the height of the projecting portion 13 is too low, and a sufficient amount of biting into the steel material cannot be ensured. As described above, the height H1 of the protrusion 13 is higher than the coating thickness (F in FIG. 2(c)) on the surface of the steel material to be joined.

On the other hand, if H1/H2 exceeds 15, the height of the projection 13 becomes too high, and the rigidity of the projection 13 becomes insufficient. Is required. Further, if the depth of the groove 11 is too small, the stress relaxation effect is reduced, and when the protrusion 13 is bitten into the steel material, the deformed portion of the steel material (the bulging portion due to the biting of the protrusion 13) is offset by the groove 11 . difficult to absorb.

The surface layer of the protrusion forming surface 111 on at least one surface of the grooved joining plate 100 is subjected to surface treatment (for example, nitriding treatment), and the hardness of the flange of the H-section steel 200 to be joined is higher than that of the flange. It also has high hardness. Here, it is desirable that the hardness (for example, Vickers hardness) of the projection-forming surface 111 after the surface treatment is twice or more the hardness of the projection-forming surface of the raw material before the treatment. The Vickers hardness of the projection-forming surface of the raw material before treatment can be measured in the cross section of the grooved joint plate 100 in the vicinity of the projection-forming surface and excluding the surface-treated portion.

Such a grooved joining plate 100 can be manufactured by the method disclosed in Japanese Patent Laid-Open No. 2018-164956, for example. According to this method, the tip of the projection 13 can be sharpened, and the groove 11 can be easily formed into an arc shape.

As described above, in the present embodiment, the height of the projecting portion 13 is higher than the thickness of the film 201 formed on the surfaces of the steel materials to be joined. The tip of the portion 13 can be reliably bitten into the steel material. Therefore, a high slip coefficient can be ensured even when steel materials having coatings are joined together.

Further, by forming the protrusion 13 into a shape that satisfies a specific condition, when the steel materials are joined using this, the protrusion 13 can surely bite into the steel material and a high slip coefficient can be obtained. Moreover, stress concentration does not occur in the groove portion 11, and manufacturing is easy.

In addition, by applying surface treatment to make the hardness of the surface layer of the protrusion forming surface 111 twice or more that of the steel materials to be joined, the tips of the protrusions 13 can be made to bite into the steel material to exhibit a non-slip effect. can.

[Second embodiment]
Next, a second embodiment will be described. In the following description, the same reference numerals as those in FIGS. 1 to 3 are given to components having the same functions as those in the first embodiment, and duplicate descriptions are omitted.

In a second embodiment, the grooved joint plate 100 is not used alone, but together with the clamping member 120 . As shown in FIG. 4(a), one surface of the joint plate 100 with grooves is formed with the protrusion 13 and the groove 11, and the holding member 120 is fixed to the other surface. The sandwiching member 120 may be made of the same material as the grooved joining plate 100, but surface treatment is unnecessary. Also, the clamping member 120 may be made of a material that is softer than the joint plate 100 with grooves.

In the example shown in FIG. 4( a ), the grooved joining plate 100 and the sandwiching member 120 are joined by the welded portion 121 . Moreover, as shown in FIG. 4(b), the grooved joining plate 100 and the holding member 120 may be joined by bolts 123. FIG. Alternatively, as shown in FIG. 4(c), a coating 124 may be formed on the surface of the joint plate 100 with grooves opposite to the surface on which the projections 13 and the grooves 11 are formed. The coating 124 is for increasing the slip coefficient between the grooved joining plate 100 and the clamping member 120, and is made of, for example, inorganic zinc-rich paint. In this case, the grooved joining plate 100 and the clamping member 120 are prevented from being displaced by friction, and thus the two do not need to be integrated. Although not shown, the clamping member 120 is formed with through holes at positions corresponding to the through holes 12 of the joint plate 100 with grooves.

FIG. 5 is a cross-sectional view showing a steel joining structure 300a using the holding member 120. As shown in FIG. An example in which the clamping member 120 and the grooved joining plate 100 are joined together with bolts 123 is shown, but they may be joined together with a welded portion 121 (FIG. 4(a)). ) may be formed. Moreover, you may combine these. For example, if the surface of the grooved joint plate 100 facing the clamping member 120 is coated with a paint capable of ensuring a sufficient slip coefficient, the grooved joint plate 100 and the clamping member 120 can be made of H-shaped steel. On the other hand, they may be integrally joined with high-strength bolts 101 .

A pair of H-section steels 200 are arranged so that their ends face each other, and a grooved joining plate 100 and a clamping member 120 of substantially the same size are arranged so as to straddle the H-section steels 200 . At this time, the plurality of protrusions 13 and grooves 11 of the grooved joining plate 100 are arranged to face the H-section steel 200 , and the H-section steel 200 is sandwiched between the grooved joining plate 100 and the sandwiching member 120 . That is, the H-section steel 200 is sandwiched between the sandwiching members 120 , and the grooved joining plate 100 is arranged between the sandwiching member 120 and the H-section steel 200 . Note that the grooved joint plate 100 may be divided into a plurality of pieces.

As described above, through holes are formed in the grooved joining plate 100 and the holding member 120 . The through holes of the pair of grooved joining plates 100 and the clamping member 120 sandwiching the H-section steel 200 and the through holes formed in the H-section steel 200 are arranged on a straight line. It is inserted and fixed by a nut 102 . By tightening the high-strength bolt 101, the protrusion 13 of the grooved joining plate 100 bites into the H-section steel 200, and the H-section steel 200 can be joined together.

According to the second embodiment, effects similar to those of the first embodiment can be obtained. In addition, by using the sandwiching members 120 and securing the total thickness of the two sandwiching members 120 and the two grooved joint plates 100 that sandwich the steel material, even if the thickness of the grooved joint plate 100 is reduced, the sandwiching members 120 provides stiffness. By thinning the grooved joining plate 100 for performing grooving and the like in this manner, processing becomes easier.

[Third Embodiment]
Next, a third embodiment will be described. FIG. 6(a) is a cross-sectional view showing a grooved joining plate 100a according to the third embodiment. The grooved joining plate 100a has substantially the same configuration as the grooved joining plate 100, but differs in that the protrusions 13 and the grooves 11 are formed on both sides.

The projections 13 and the grooves 11 formed on both surfaces of the grooved joining plate 100a are formed in the same direction. As shown in FIG. 6A, the distances (pitch of the protrusions 13) L1a and L1b between the protrusions 13 on both sides and the height of the protrusions 13 may be the same. As shown in (b), the distances L1a and L1b between the protrusions 13 may be different on each surface of the grooved joining plate 100a. Moreover, the height of the protrusions 13 may be different on each surface of the grooved joining plate 100a. In the joint plate 100a with grooves, it is sufficient that at least one surface satisfies the height ratio and width ratio between the protrusions 13 and the grooves 11 described above. It is desirable to satisfy the height ratio and width ratio of 11.

FIG. 7 is a diagram showing a steel material joining structure 300b using the grooved joining plate 100a. In the steel material joining structure 300b, the grooved joining plate 100a and the H-shaped steel 200 are sandwiched between the sandwiching members 120 and fixed by the high-strength bolt 101 and the nut 102, similarly to the steel material joining structure 300a. At this time, the sandwiching member 120 and the joint plate 100a with grooves are not joined by welding or bolts, but rather, the protrusions 13 of the joint plate 100a with grooves bite into the sandwiching member 120, thereby preventing displacement between the two. both are fixed. That is, the protrusions 13 on the outer surface side of the grooved joint plate 100 a bite into the holding member 120 , and the protrusions 13 on the inner surface side of the grooved joint plate 100 a bite into the H-section steel 200 . Note that the grooved joint plate 100a and the clamping member 120 may be temporarily joined with bolts or the like in order to improve work efficiency. Also, the grooved joint plate 100a may be divided into a plurality of pieces.

At this time, the holding member 120 and the H-shaped steel 200 may differ in material, hardness, and the like. In this case, there is an appropriate pitch and height of the projections 13 for each member. For this reason, by changing the distance and height between the protrusions 13 on both sides so that the protrusions 13 are suitable for the members contacting both sides of the grooved joint plate 100a, the clamping member 120 and H can be efficiently separated. The protrusions 13 can be made to bite into both of the shaped steels 200 .

According to the third embodiment, effects similar to those of the second embodiment can be obtained. Moreover, by forming the protrusions 13 on both surfaces of the grooved joint plate 100a, it is not necessary to firmly join the holding member 120 and the grooved joint plate 100a. Therefore, a joining member between the holding member 120 and the joint plate 100a with grooves is not necessary, or even if they are joined, they can be joined only temporarily.

[Fourth embodiment]
Next, a fourth embodiment will be described. FIG. 8 is a perspective view showing a grooved joining plate 100b according to the fourth embodiment. The grooved joint plate 100b has substantially the same configuration as the grooved joint plate 100, but differs in that the protrusions 13 and the grooves 11 are formed in two directions.

The grooved joining plate 100b is provided with a plurality of protrusions 13 on at least one surface in contact with an object to be joined. Grooves 11a and 11b are formed between adjacent protrusions 13, respectively. The grooves 11a, which are the first grooves, are arranged parallel to each other. Similarly, the grooves 11b, which are the second grooves, are arranged parallel to each other. The groove portion 11a and the groove portion 11b are formed in directions different from each other. In the illustrated example, the grooves 11a and 11b are provided so as to be orthogonal to each other, but the angle between the grooves 11a and 11b is not limited to 90 degrees. Moreover, in the illustrated example, the protrusion 13 and the grooves 11a and 11b are formed only on one side, but they may be formed on both sides. In the grooved joining plate 100b, at least one of the grooves 11a and 11b may satisfy the height ratio and width ratio between the projection 13 and the groove 11. , it is desirable to satisfy the height ratio and width ratio of the protrusion 13 and the groove 11 described above.

FIG. 9(a) is a partial plan view of the grooved joining plate 100b. In the illustrated example, the intervals between the grooves 11a and 11b are substantially equal. Therefore, the widths (C and D in the figure) of the protrusion 13 in each direction are approximately 1:1. On the other hand, as shown in FIG. 9B, the intervals between the grooves 11a and 11b may be changed. For example, if emphasis is placed on biting in one direction of the protrusion 13, C:D is preferably in the range of 1:1 to 1:999, more preferably 1:1 to 1:50. and C:D is optimal between 1:1 and 1:5.

Also, the grooves 11a and 11b may not be parallel or perpendicular to the sides of the grooved joint plate 100b. In FIG. 10, the grooves 11a and 11b are formed at an angle of 45 degrees (I and J in the figure) with respect to the longitudinal direction (G in the figure) of the grooved joining plate. Thus, the grooves 11a and 11b may be formed obliquely with respect to the longitudinal direction of the grooved joining plate.

Moreover, the grooves 11a and 11b do not have to be perpendicular to each other. FIG. 11 is a partially enlarged view of grooves 11a and 11b. The angle θ formed by the groove portion 11a and the groove portion 11b may be 1 degree to 90 degrees, more preferably in the range of 30 degrees to 90 degrees, and most preferably in the range of 45 degrees to 90 degrees. .

According to the fourth embodiment, effects similar to those of the first embodiment can be obtained. In addition, since the grooves 11a and 11b are provided in different directions, the number of angular portions of the projections 13 increases, the projections 13 can be meshed with each other depending on the object to be welded, and the slip coefficient can be increased. .

Moreover, a high slip coefficient can be obtained not only in the tensile direction between the H-section steels 200 but also in the shear direction between the H-section steels 200 . Moreover, when joining the H-section steel 200, the same member can be used without changing the formation direction of the grooves and protrusions between the web joining and the flange joining. Note that the grooved joining plate 100b can be used alone, but may be used together with the holding member 120. FIG.

[Fifth Embodiment]
Next, a fifth embodiment will be described. FIG. 12 is a plan view showing a grooved joining plate 100e according to the fifth embodiment. The grooved joint plate 100e has substantially the same configuration as the grooved joint plate 100 and the like, but differs in that a plurality of grooves 11 and protrusions 13 are formed concentrically around the through-hole 12 .

By forming the grooves 11 and the projections 13 in a circular shape in this way, it is possible to secure a slip coefficient in all directions. Although six concentric circles are formed in the illustrated example, the number and arrangement of the concentric circles are not limited to the illustrated example. Also, the concentric circles may overlap each other.

According to the fifth embodiment, effects similar to those of the fourth embodiment and the like can be obtained. Thus, the grooves 11 and the protrusions 13 are not limited to being formed linearly.

[Sixth Embodiment]
Next, a sixth embodiment will be described. FIG. 13 is a perspective view showing a grooved joining plate 100c according to the sixth embodiment. The grooved joint plate 100c has substantially the same structure as the grooved joint plate 100, but differs in that a flat portion 14 in which the protrusion 13 and the groove 11 are not formed is formed substantially at the center in the width direction. The flat portion 14 is formed over the entire length in parallel with the protrusion 13 and the groove portion 11 .

FIG. 14 is a cross-sectional view of a joint in a steel material joining structure 300c in which steel materials to be joined are joined using the grooved joining plate 100. As shown in FIG. In the steel material joining structure 300c, a pair of steel materials (H-section steel 200) are butted against each other at their ends, and the grooved joining plate 100c is arranged and fixed so as to straddle the flanges of the adjacent H-section steels 200. be.

At this time, a slight gap is formed at the butted portion of the ends of the H-section steel 200 . The grooved joining plate 100c is arranged and fixed so that the flat portion 14 is positioned in this gap. In this way, by not forming the protrusion 13 in the portion where the protrusion 13 does not need to be bitten, processing becomes easier.

The plate thickness of the flat portion 14 may be made thinner than the plate thickness of other portions (minimum plate thickness of the groove portion 11). By doing so, the flat portion 14 can be made a portion that is easier to deform than other portions. That is, the deformable portion can be formed substantially in the widthwise center of the grooved joining plate 100c.

For example, when the H-section steels 200 are butted against each other, the centers of the H-section steels 200 may not completely match, causing misalignment. In this case, if the grooved joining plate is arranged to straddle the H-section steels 200, the protrusion biting into one H-section steel 200 differs from the protrusion biting into the other H-section steel 200, and as a whole This is a factor in lowering the slip coefficient. On the other hand, when the grooved joint plate 100c in which the easily deformable portion is formed substantially in the center of the width direction is tightened into the H-shaped steel 200, the flat portion 14 is deformed, and the grooved joint plate 100c follows the misalignment. 100c can be transformed. Therefore, a desired slip coefficient can be secured.

According to the sixth embodiment, effects similar to those of the first embodiment can be obtained. In addition, since it is not necessary to form the protrusion 13 in the gap between the H-section steels 200 to be joined, by making this portion the flat portion 14, the entire surface of the plate material can be processed to form a protrusion or the like. In comparison, the processing area is reduced and processing becomes easier.

Further, by reducing the thickness of the flat portion 14, an easily deformable portion can be formed. Therefore, the influence of misalignment between the H-section steels 200 can be suppressed by deforming the flat portion. The grooved joining plate 100b can be used alone, but the clamping member 120 may be used. In this case, the projections 13 may be formed on both surfaces, but the flat portion 14 need not be formed on the surface facing the clamping member 120 .

Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to such examples. It is obvious that a person skilled in the art can conceive of various modifications or modifications within the scope of the technical ideas disclosed in the present application, and these also belong to the technical scope of the present invention. Understood.

For example, in each of the above-described embodiments, an example in which a grooved joining plate is used in the butted portion of the H-section steels to join them together has been described, but the present invention is not limited to this. For example, it can be applied to butt and join steel materials other than H-shaped steel. Moreover, it can be applied to a case where another steel material is fixed to a part of one steel material, instead of being used for a butted portion of a pair of steel materials.

FIG. 15 is a diagram showing a steel material joining structure 300d. The steel-bonded structure 300d is formed by joining a steel material 200b, which is a second steel material, to the surface of a steel material 200a, which is a first steel material. A film (not shown) is formed on the surface of the steel material 200a. Further, the steel material 200b is a member in which the clamping member 120 and a bracket 125 to which a reinforcing member or the like can be joined are integrated. A grooved joining plate 100 is arranged between the steel material 200a and the steel material 200b. A coating 124 is formed on the surface of the grooved joining plate 100 facing the clamping member 120 to ensure a slip coefficient. Instead of the film, the grooved joint plate 100 may also have the projection 13 and the groove 11 formed on the surface of the joint plate 100 facing the clamping member 120 , or the joint plate 100 with the groove and the clamping member 120 may be formed on the same surface. may be welded or bolted.

A hole is formed through the clamping member 120, the grooved joining plate 100, and the steel material 200a, and the high-strength bolt 101 is passed through the hole from the clamping member 120 side, for example. On the back side of the steel material 200a, a nut 102 is screwed onto the high-strength bolt 101 to fix the steel material 200a to the steel material 200b. At this time, a grooved joining plate 100d may be arranged between the nut 102 and the steel material 200a. The grooved joining plate 100d is, for example, a washer having a protrusion and a groove formed on one surface. Note that the grooved joining plate 100d may be formed so as to straddle all the high-strength bolts 101, or may be arranged so as to straddle some of the high-strength bolts 101 as shown on the left side of the figure. As shown on the right side, they may be arranged for each high-strength bolt 101 respectively.

Even in this case, if the height of the protrusions of the grooved joining plate 100 is higher than the thickness of the coating of the steel material 200a and the protrusions can penetrate the coating, the steel materials 200b can be joined to the steel materials 200a. That is, in the present application, joining is not limited to the case where a pair of steel materials of the same kind are butted against each other and joined, but also includes the case where one steel material is partially fixed to another steel material.

11, 11a, 11b Grooves 12 Through holes 13 Protrusions 14 Flat parts 100, 100a, 100b, 100c, 100d, 100e Grooved joining plate 101 Height Force bolt 102 Nut 111 Protrusion forming surface 120 Clipping member 121 Welded portion 123 Bolt 125 Bracket 200 H-shaped steel 200a, 200b Steel material 201 --- Coatings 300, 300a, 300b, 300c, 300d --- Steel material joining structure

Claims (9)

A grooved joining plate for joining another steel material to a coated steel material,
having a plurality of protrusions and grooves formed between the protrusions on at least one surface of the plate-like member;
A joint plate with a groove, wherein the height of the protrusion is higher than the thickness of the coating, and the protrusion can penetrate the coating. 2. The grooved joining plate according to claim 1, wherein said protrusions and said grooves are formed on both sides of said grooved joining plate. 3. The grooved joint plate according to claim 2, wherein the distances between the protrusions are different on each surface of the grooved joint plate. 4. The groove according to any one of claims 1 to 3, wherein the groove has first grooves parallel to each other and second grooves formed in a direction different from that of the first grooves. Grooved joint plate as described. 5. The grooved joining plate according to claim 4, wherein the angle formed by said first groove and said second groove is 1 to 90 degrees. 6. The grooved joining plate according to claim 4, wherein the ratio of the interval between the first grooves to the interval between the second grooves is 1:1 to 1:999. . At least one surface of the grooved joining plate is surface-treated,
7. The grooved joining plate according to any one of claims 1 to 6, wherein the hardness of said one surface is at least twice the hardness of the projection-forming surface of the raw material before treatment. a pair of steel materials having a coating on the surface and having their ends butted against each other;
a grooved joining plate fixed so as to straddle the steel materials,
The grooved joining plate is
Having a plurality of protrusions and grooves formed between the protrusions on at least one surface,
A steel joining structure, wherein the height of the protrusion is higher than the thickness of the coating, and the protrusion penetrates through the coating. a first steel material having a coating on its surface;
a second steel material that is joined to the first steel material;
a grooved joint plate disposed between the first steel material and the second steel material,
The grooved joining plate is
Having a plurality of protrusions and grooves formed between the protrusions on at least one surface,
A steel joining structure, wherein the height of the protrusion is higher than the thickness of the coating, and the protrusion penetrates through the coating.

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