JP2007044063A - Cross connection structure of wide flange shape and anti-earthquake device of bookshelf using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cross connection structure of wide flange shapes for easily and strongly connecting the wide flange shapes with each other in a cross shape or a T-shape on the same plane in the state of turning a web in a horizontal direction; and to provide an anti-earthquake device of a bookshelf for which earthquake resistance is imparted by connecting the upper parts of the plurality of bookshelves by using the wide flange shapes. <P>SOLUTION: A recessed groove part 11 at the lower part of the web 9 of a second wide flange shape 2 is fitted to a connection member 13 projected on the lower part of a flange part 10 on one side of a first wide flange shape 1, the distal end of the second wide flange shape is abutted to the flange part on one side of the first wide flange shape, and the connection member is fixed to both flange parts 10 of the second wide flange shape with bolts. An arch part 14 of a joint member 4 is crossed at the upper part of the first wide flange shape, one fixing part 15 of the joint member 4 is fitted to a recessed groove part 12 at the upper part of the second wide flange shape and fixed to both flange parts of the second wide flange shape with bolts, and the other fixing part 15 of the joint member is fixed to a third wide flange shape 3 connected to the flange part on the other side of the first wide flange shape or the flange part with bolts. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cross-connecting structure of H-section steel and an earthquake resistance device for a book rack using the same, and more particularly, a cross-connecting structure of H-section steel that connects H-section steels in a cross shape or a T-shape on the same plane. And a bookshelf earthquake-proof device using the same.

  Conventionally, H-section steel has been widely used in construction and construction applications. Here, when using the H-section steel in a horizontal state, in order to utilize the high bending strength, the H-section steel is used with the web oriented vertically and both flanges oriented horizontally. Is common. Moreover, such H-shaped steel may be used by crossing at right angles.

  Patent Document 1 discloses a point in which H-shaped steels are orthogonally crossed on the same plane and connected using a cross joint. That is, in the planar cross joint of Patent Document 1, the right and left ends of a rectangular parallelepiped having a through hole in the center of the side surface are formed in a truncated cone-shaped truncated cone, and the same shape is formed on both sides of the truncated pyramid from the end surface toward the through hole An insertion hole is provided so as to be orthogonal to each other on a plane, and the tip of the insertion hole is a closed end surface on the side surface of the through hole. Here, the size of the through hole of the flat cross joint is set to be the same as the height of the H-section steel in the vertical direction, and the width is set to be slightly larger than the width of the H-section steel. It is set the same as the H-shaped steel.

  However, in order to cross-connect the H-section steel using the above-described cross joint, the H-section steel is inserted into the through hole, and the end of another H-section steel that intersects the H-section steel is inserted into the insertion hole. This requires a large insertion force and is not only inferior in workability but also not easy to disassemble.

  Further, in Patent Document 2 related to the prior application of the present applicant, a plurality of bookshelves are arranged in parallel, and a T-shaped joint or an inverted L-shaped joint is provided on an upper vertical piece of a connecting bracket protruding above the top plate of each bookshelf. The vertical hooks are fixed with screws, and both ends of the arch-shaped anti-vibration hooks are connected to the horizontal hooks of the above-mentioned continuous frames provided on the adjacent bookshelf. An assembly-type bookshelf is disclosed which is handed over and has a lighting fixture attached to its lower surface.

By the way, large bookshelves such as libraries are heavy and the passage width between the bookshelves is wide, so that particularly high bending strength and torsional strength are required as vibration isolators passed between the bookshelves. Since the vibration isolator of Patent Document 2 is a normal steel lightweight square pipe or a channel member having a substantially U-shaped cross section, it cannot be denied that the strength is insufficient in an unexpected large earthquake.
Japanese Utility Model Publication No. 6-76444 (FIGS. 1 and 2) Japanese Patent No. 2795186 (FIGS. 1, 2, and 3)

  Therefore, in view of the above-mentioned situation, the present invention intends to solve the problem that an H-section steel having both flange portions on both sides of the web is formed on the same plane with the web facing in the horizontal direction. It provides an H-shaped steel cross-connecting structure that can be easily and firmly connected to each other in a cross-shaped or T-shape, and is connected to the upper part of a plurality of shelves using H-shaped steel for earthquake resistance. The point is to provide a seismic device for the bookshelf.

  In the present invention, in order to solve the above-mentioned problem, an H-section steel having both flange portions on both sides of the web is formed by crossing the H-section steels in a cross shape or T on the same plane with the web facing in the horizontal direction. A cross-connecting structure of H-shaped steels connected in a letter shape, and a concave groove part below the second H-shaped steel web is fitted to a connecting member protruding from the lower part of the one side flange part of the first H-shaped steel. The tip of the second H-shaped steel abuts against one flange portion of the first H-shaped steel, and the connecting member is bolted to both flange portions of the second H-shaped steel, while crossing above the first H-shaped steel. One fixed part of the joint member having the arch part and fixed parts at both ends thereof is fitted into the concave groove part above the web of the second H-shaped steel, and the one fixed part is fitted to both flange parts of the second H-shaped steel. The other fixed portion of the joint member is bolted to the other flange portion of the first H-section steel. To constitute a cross-linking structure of the H-beams, characterized in that bolted to the 3H-shaped steel or the flange portion coupled (claim 1).

  Here, a concave groove portion below the web of the third H-section steel is fitted to a connecting member protruding from the lower side of the other flange portion of the first H-section steel, and the tip of the third H-section steel is connected to the first H-section steel. While abutting against the other flange portion, the connecting member is bolted to both flange portions of the third H-section steel, while the other fixed portion of the joint member is fitted into the concave groove portion above the web of the third H-section steel. The other fixed portion is bolted to both flange portions of the third H-section steel, and the second H-shape steel and the third H-section steel that are formed in a straight shape are cross-connected to the first H-section steel in a cross shape. (Claim 2).

  Alternatively, a connecting plate is extended above the other flange portion of the first H-shaped steel, the other fixing portion of the joint member is a vertical fixing plate formed at the other end of the arch portion, and the fixing plate is The second H-shaped steel is connected to the first H-shaped steel in a T-shape by being bolted to each other while being joined to the connecting plate.

  Further, a flange portion above the web of the first H-section steel, a notch is formed in a portion where the tip of the other H-section steel hits, and a concave groove portion above the first H-section steel and another H It is more preferable that the concave groove portion above the shape steel is communicated (claim 4).

  And the connection support | pillar which used the cross connection structure of the H-section steel of Claim 1, 2, or 4 and arranged the some bookshelf side by side by providing a channel | path between them, and protruded above the top plate of each adjacent bookshelf The second H-section steel and the third H-section steel connected by a joint member are horizontally connected to the upper end of each by a mounting bracket, and are cross-connected in a cross shape between the second H-section steel and the third H-section steel. The first H-section steel is arranged along the middle of the adjacent bookshelves, and a bookshelf earthquake-proof device is provided in which a lighting fixture is provided on the web of the first H-section steel (Claim 5).

  Further, an intermediate portion of the second H-shaped steel is horizontally connected to the upper end of the connecting column of the outermost rack by a mounting bracket, and a joint member is attached to the tip of the second H-shaped steel extending to the front side of the rack. It is also preferable that the first H-section steel connected in a letter shape is arranged along the outside of the bookshelf, and a lighting device is provided on the web of the first H-section steel.

  The cross-linking structure of the H-section steel of the invention according to claim 1 as described above is such that the H-section steel having both flange portions on both sides of the web is placed on the same plane with the web facing in the horizontal direction. Shaped steel can be easily and firmly connected to each other in a cross shape or T-shape, and the groove below the second H-shaped steel web is fitted to the connecting member protruding from the lower part of the flange of the first H-shaped steel. Therefore, positioning is easy, and the fixing portion of the joint member is fitted into the concave groove portion above the second H-shaped steel, and the fixing portion is bolted to the flange portion of the second H-shaped steel. Since the upper and lower portions are connected to the connecting member and the joint member, respectively, with the steel web interposed therebetween, the upper and lower bending strengths are increased.

  According to the second aspect of the present invention, the joint member having the arch portion intersecting above the first H-section steel and the fixing portions at both ends thereof is used, and the connecting members are provided to protrude from both flange portions of the first H-section steel. The respective connecting members are fitted into the lower groove portions of the second H-shaped steel and the third H-shaped steel and bolted, and the arches are crossed above the first H-shaped steel, and fixed portions at both ends thereof. Are fitted into the recessed grooves above the second H-shaped steel and the third H-shaped steel, respectively, and bolted, so that the second H-shaped steel and the third H-shaped steel that are linear are compared with the first H-shaped steel. It can be cross-connected easily and firmly in a cross shape.

  According to claim 3, the arch portion intersecting above the first H-section steel, the joint member having the fixing portion at one end thereof and the fixing plate at the other end, and both one-side flange portions of the first H-section steel are used. The connecting member projecting from the second H-shaped steel is fitted into the lower groove of the second H-shaped steel and bolted, the arch is crossed above the first H-shaped steel, and the solid plate at the end is connected to the other flange. Since it joined and bolted to the connecting plate extended in the upper part of a part, 2nd H-section steel can be cross-connected easily and firmly in a T shape with respect to said 1st H-section steel.

  According to the fourth aspect, since the upper groove portion of the first H-section steel and the upper groove portion of the other H-section steel communicate with each other, the cords are arranged over the plurality of H-section steels using the upper groove portion. It is possible to wire or arrange the ballast or relay of the lighting fixture in a state where it cannot be seen from below.

  According to the earthquake resistance device for the bookshelf of the invention according to claim 5, since the upper portions of the bookshelves arranged in parallel across the passage are connected by the H-shaped steel, the bookshelf falls down even if the earthquake shakes. Therefore, it is possible to ensure the safety of the users in the passage, and by installing a lighting fixture on the H-shaped steel web arranged along the middle of the bookshelf, the both shelves sandwiching the passage and the passages It can be effectively illuminated and has excellent appearance.

  According to the sixth aspect, a lighting fixture can be provided on the outer side of the outermost bookshelf using the H-shaped steel connected in a T shape to the H-shaped steel for earthquake resistance.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. 1 to 8 show an H-section steel cross-connecting structure according to the present invention, and FIGS. 9 to 13 show a bookshelf earthquake-resistant apparatus using the H-section steel cross-connecting structure. In the figure, reference numeral 1 is a first H-section steel, 2 is a second H-section steel, 3 is a third H-section steel, 4 is a cross joint member, 5 is a T joint member, 6 is a bookshelf, 7 is a passage, and 8 is a connecting post. Each is shown.

  The H-shaped steel which is an object of the present invention has both flange portions 10 and 10 on both sides of the web 9, a concave groove portion 11 below the web 9, and a concave groove portion 12 above. And the plate | board thickness of the steel plate which comprises the said web 9 is 6 mm, and the plate | board thickness of the steel plate which comprises the said flange part 10 is 4.5 mm. The H-shaped steel is obtained by welding the width direction center of the flange portion 10 to each side end of the web 9 at a right angle. The outer shape of the H-section steel is that the width of the flange portion 10 is 65 mm, The outer surface spacing is 65 mm.

  The cross-linking structure of H-section steels according to the present invention is an H-shape formed by connecting H-section steels in a cross or T-shape on the same plane with the H-section steel web 9 oriented horizontally. A steel cross-linking structure, in which a concave groove portion 11 below a web 9 of a second H-section steel 2 is fitted to a coupling member 13 projecting from a lower portion of the one-side flange portion 10 of the first H-section steel 1, While the front end of the 2H section steel 2 is abutted against one flange portion 10 of the first H section steel 1, the connecting member 13 is bolted to both flange sections 10 and 10 of the second H section steel 2, while the first H section steel 1 fitting part 15 of joint member 4 which has arch part 14 which intersects above 1 and fixed parts 15 and 15 in the both ends is fitted in concave groove part 12 above web 9 of 2 H section steel 2, While bolting one of the fixed portions 15 to both flange portions 10 and 10 of the second H-section steel 2, The other fixing portion 15 of the serial coupling member 4 is obtained by bolted to the 3H-shaped steel 3 or the flange portion 10 was connected to the other side flange portion 10 of the 1H-shaped steel 1.

  First, based on FIGS. 1-4, 1st Embodiment which connects H-section steel in cross shape on the same plane is described. In the present embodiment, the concave groove portion 11 below the web 9 of the third H-section steel 3 is fitted to the connecting member 13 protruding from the lower side of the other flange portion 10 of the first H-section steel 1, and the third H-section steel. 3 is abutted against the other flange portion 10 of the first H-section steel 1, and the connecting member 13 is bolted to both flange portions 10, 10 of the third H-section steel 3. The fixing portion 15 is fitted into the concave groove portion 12 above the web 9 of the third H-section steel 3, and the other fixing portion 15 is bolted to both flange portions 10, 10 of the third H-section steel 3. In this connected state, the second H-section steel 2 and the third H-section steel 3 are linearly connected and cross-connected to the first H-section steel 1 in a cross shape.

  More specifically, the cross-shaped joint member 4 includes an arch portion 14 that intersects above the first H-section steel 1 and fixing portions 15 and 15 on both sides thereof, and an upper surface plate that forms the arch portion 14. Leg plates 17 and 17 are suspended at right angles on both sides of 16, and a recess 18 is formed in the lower half of the center of both leg plates 17 and 17 to avoid both flange portions 10 and 10 of the first H-section steel 1. Both end portions 17 and 17 are fixed portions 15 and 15 which are fitted into the upper concave groove portions 12 of the second H-section steel 2 and the third H-section steel 3. That is, each of the fixing portions 15 is constituted by a part of the mounting plates 19 and 19 of the leg plates 17 and 17.

  In addition, the connecting members 13 and 13 are provided at positions where the second H-shaped steel 2 and the third H-shaped steel 3 are connected in the lower half of the side surfaces of the flange portions 10 and 10 of the first H-shaped steel 1. It is protruding. Here, the connecting member 13 is a channel member having a substantially U-shaped cross section with a concave groove facing downward, and has a size that fits in the lower concave groove portion 11 of the second H-section steel 2 and the third H-section steel 3. is there. And the said connection member 13 is protrudingly welded at right angle to the lower half part of the side surface of both the flange parts 10 and 10 of the said 1H section steel 1. As shown in FIG. Moreover, it is the flange part 10 above the web 9 of the said 1H section steel 1, Comprising: The notch part 20 is formed in the part which the front-end | tip of the other H section steel butted, and the concave groove part above the 1H section steel 1 12 and an upper groove portion 12 of another H-shaped steel are communicated with each other. Actually, the notch 20 is formed immediately above the connecting member 13.

  Then, the lower groove portions 11 and 11 of the second H-section steel 2 and the third H-section steel 3 are fitted to the connecting members 13 and 13 protruding from both flange portions 10 and 10 of the first H-section steel 1, respectively. The flange portions 10 and 10 of the second H-section steel 2 and the third H-section steel 3 are fixed to the connecting member 13 with bolts 21. Then, both fixed portions 15 and 15 of the joint member 4 are fitted into the upper concave groove portions 12 and 12 of the second H-shaped steel 2 and the third H-shaped steel 3 from above so as to intersect the first H-shaped steel 1, respectively. Then, both flange portions 10 and 10 of the second H-section steel 2 and the third H-section steel 3 are connected to the fixing portion 15 with bolts 22.

  Next, based on FIGS. 5-8, 2nd Embodiment which connects H-section steel in T shape on the same plane is described. In the present embodiment, a connecting plate 23 is extended above the other flange portion 10 of the first H-section steel 1 and the other fixed portion 15 of the joint member 5 is formed at the other end of the arch portion 14. In this state, the fixing plate 24 is bolted to each other in a state where the fixing plate 24 is joined to the connecting plate 23, and the second H-shaped steel 2 is connected to the first H-shaped steel 1 in a T-shape.

  More specifically, the T-shaped joint member 5 differs from the cross-shaped joint member 4 only in one fixing portion 15 at both positions of the leg plates 17 and 17 at positions corresponding to the end portions of the upper surface plate 16 constituting the arch portion 14. And the fixing plate 24 is provided between the end edges of both leg plates 17 and 17. In the present embodiment, the other flange portion 10 of the first H-section steel 1 provided with the connecting plate 23 is not provided with the connecting member 13 and the notched portion 20, and the first embodiment described above. Since it is the same, the same code | symbol is attached | subjected to the same structure and the description is abbreviate | omitted.

  Then, the lower groove portion 11 of the second H-section steel 2 is fitted into the connecting member 13 protruding from the flange portion 10 of the first H-section steel 1, and the flange portions 10, 10 of the second H-section steel 2 are connected. It is fixed to the connecting member 13 with bolts 21. Then, a fixing portion 15 composed of the mounting plates 19 and 19 of the joint member 5 is fitted into the upper concave groove portion 12 of the second H-section steel 2 from above so as to intersect the first H-section steel 1, and the second H The flanges 10 and 10 of the structural steel 2 are connected to the fixing part 15 by bolts 22,..., And the fixing plate 24 serving as the other fixing part 15 is opposite to the flange part 10 to which the connecting member 13 is fixed. It joins to the connecting plate 23 extended above the flange part 10 of the side, and connects both plates with the volt | bolts 25 and 25. FIG. Here, the connecting plate 23 may be integrated with the flange portion 10 extending from the connecting plate 23 or a separate object may be welded to the flange portion 10.

  In this embodiment, the connecting plate 23 is extended to the flange portion 10 of the first H-section steel 1, but the mounting plate 23 is not provided, and the mounting plate 23 is attached to the end of the upper surface plate 16 of the joint member 5. It is also possible to provide a fixing plate 24 having the same vertical dimension as that of the plate 19 and connect the two plates with bolts 25 in a state where the fixing plate 24 is joined to the inner surface of the other flange portion 10.

  Finally, based on FIG.4, FIG.8, FIG.9-FIG. 13, the earthquake-resistant apparatus of the bookshelf using the above-mentioned cross connection structure of H-section steel is demonstrated. This bookshelf earthquake-proof device has a plurality of bookshelves 6,... Arranged in parallel with a passage 7 between them, and a joint member on the upper end of a connecting column 8 projecting above the top plate 26 of each adjacent bookshelf 6,6. The second H-section steel 2 and the third H-section steel 3 connected at 4 are connected horizontally by the mounting bracket 27, and the second H-section steel 2 and the third H-section steel 3 are cross-connected in a cross shape. The first H-section steel 1 is disposed along the middle of the adjacent bookshelves 6 and 6, and the lighting fixture 28 is provided on the web 9 of the first H-section steel 1. Further, an intermediate portion of the second H-section steel 2 is horizontally connected to the upper end of the connecting column 8 of the outermost rack 6 by the mounting bracket 27, and the second H-section steel 2 extending to the front side of the rack 6 is connected. A first H-section steel 1 connected in a T-shape by a joint member 5 at the tip is arranged along the outside of the rack 6, and a lighting fixture 28 is provided on the web 9 of the first H-section steel 1.

  Here, based on FIG. 4, a longitudinal intermediate of the second H-section steel 2 or the third H-section steel 3 by using the mounting bracket 27 on the upper end of the connecting column 8 protruding above the top plate 26 of the bookshelf 6. A structure for connecting the parts will be briefly described. The connecting strut 8 is formed of a square pipe, and the mounting bracket 27 is formed of an L-shaped bracket. The vertical piece 27A of the mounting bracket 27 is inserted from the upper end inside the connecting column 8 and connected to one side by bolts 29, 29, and the other side facing the connecting column 8 is also the same. The vertical pieces 27A of the mounting brackets 27 are connected to each other, and the horizontal pieces 27B, 27B of the mounting brackets 27, 27 located at the upper end portion of the connecting column 8 are connected to the lower side of the second H-section steel 2 or the third H-section steel 3. In the groove 11, the lower surface of the web 9 is connected with bolts 30.

  A plurality of connecting struts 8 are erected above the top plate 26 of the bookshelf 6 at a predetermined interval, and the second H-section steel 2 or the third H-section steel 3 is connected to each connecting strut 8 in a T-shape. In addition, at the central portion between the adjacent bookshelves 6 and 6, the first H-section steel 1 is interposed between the second H-section steel 2 and the third H-section steel 3, and the cross-joint member 4 is used for the cross connection. To do. The first H-section steel 1 has a predetermined length, and is connected to the other first H-section steel 1 using a connection piece or the like in a straight line. Similarly, the first H-section steel 1 is cross-connected to the front end of the second H-section steel 2 extending forward from the outermost rack 6 using the T-shaped joint member 5. Here, it is preferable in terms of strength that the connecting column 8 is connected in a state of extending to the upper end of a column (not shown) constituting the main body of the bookshelf 6.

  An opening 31 is formed at an appropriate position of the web 9 of the first H-section steel 1, and a lighting fixture 28 is attached to the opening 31 so as to face the opening 31. Since the first H-section steel 1 is provided with a notch 20 at the cross-connecting portion, the upper concave grooves 12 of all the H-section steels communicate with each other, and cords connected to the lighting fixture 28 thereby. Can be wired arbitrarily. Further, since the upper groove portion 12 of the H-shaped steel cannot be seen from below, it is possible to prevent the appearance from being impaired by disposing the ballast and relay of the lighting fixture 28 in the groove portion 12. It is also preferable from the viewpoint of energy saving that a human sensor is installed at an appropriate position of the H-shaped steel so that the lighting fixture 28 is turned on only when a person approaches.

  The second H-section steel 2 and the third H-section steel 3 contribute to the improvement of the seismic resistance of the bookshelf 6, and the second H-section steel 2 and the third H-section 2 connected by the joint member 4 due to the shaking during the earthquake. The shape steel 3 is subjected to a tensile force and a compressive force, and a slight twisting force is used, but a strong H-shape steel is used, and the joint member 4 is strong in a state where another H-shape steel is interposed. Therefore, it is possible to reliably suppress the swing of the bookshelf 6 to the minimum and prevent the user from falling down, thereby ensuring the safety of the user in the passage 7.

  9 to 11 are embodiments in which the second H-section steel 2 and the third H-section steel 3 are cross-connected at unequal intervals along the longitudinal direction of the first H-section steel 1, and FIG. FIG. 13 shows an aspect in which the second H-section steel 2 and the third H-section steel 3 are cross-connected at equal intervals.

BRIEF DESCRIPTION OF THE DRAWINGS It is a principal part perspective view which shows the structure cross-connected in the cross shape in 1st Embodiment of the cross connection structure of the H-section steel which concerns on this invention. It is sectional drawing which fractured | ruptured the connection part similarly in the part of 2nd H-section steel. It is sectional drawing which fractured | ruptured the connection part similarly in the part of 1st H-section steel. It is an exploded perspective view similarly. It is a principal part perspective view which shows the structure which carries out T-shaped cross connection in 2nd Embodiment of the cross connection structure of the H-section steel which concerns on this invention. It is sectional drawing which fractured | ruptured the connection part similarly in the part of 2nd H-section steel. It is sectional drawing which fractured | ruptured the connection part similarly in the part of 1st H-section steel. It is an exploded perspective view similarly. It is a perspective view showing an embodiment of a bookshelf earthquake-proof device concerning the present invention. It is also a plan view. It is also a front view. It is a top view which shows the modification of the earthquake-resistant apparatus of a bookshelf. It is a front view of a modification similarly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1H section steel 2 2H section steel 3 3H section steel 4 Joint member 5 Joint member 6 Bookshelf 7 Passage 8 Connection strut 9 Web 10 Flange part 11 Groove part 12 Groove part 13 Connection member 14 Arch part 15 Fixed part 16 Top Face plate 17 Leg plate 18 Recess 19 Mounting plate 20 Notch portion 21 Bolt 22 Bolt 23 Connecting plate 24 Fixing plate 25 Bolt 26 Top plate 27 Mounting bracket 27A Vertical piece 27B Horizontal piece 28 Lighting fixture 29 Bolt 30 Bolt 31 Opening

Claims (6)

  Intersection of H-section steel, which is formed by connecting H-section steels having both flanges on both sides of the web, with the webs oriented horizontally in the same plane, in the shape of a cross or T-shape. In the connecting structure, a concave groove portion below the web of the second H-shaped steel is fitted into a connecting member protruding from the lower portion of the one-side flange portion of the first H-shaped steel, and the tip of the second H-shaped steel is connected to the first H-shaped steel. While abutting on one side flange part of steel, the connecting member is bolted to both flange parts of the second H-shaped steel, and has an arch part intersecting above the first H-shaped steel and fixing parts at both ends thereof. One fixing part of the joint member is fitted into a concave groove part above the web of the second H-shaped steel, and the one fixing part is bolted to both flange parts of the second H-shaped steel, and the other fixing of the joint member is performed. Third H-section steel having the portion connected to the other flange portion of the first H-section steel or the flange Cross coupling structure H-beams, characterized in that the bolted.   A concave groove portion below the web of the third H-section steel is fitted to a connecting member projecting at the lower part of the other-side flange portion of the first H-section steel, and the tip of the third H-section steel is connected to the other flange of the first H-section steel. And the other connecting portion of the joint member is fitted into the groove portion above the web of the third H-shaped steel, and the other fixing portion is fitted to the groove portion of the third H-shaped steel. The fixed portion is bolted to both flange portions of the third H-section steel, and the second H-section steel and the third H-section steel that are linear are cross-connected to the first H-section in a cross shape. A cross-linked structure of H-section steel according to 1.   A connecting plate is extended above the other flange portion of the first H-shaped steel, the other fixing portion of the joint member is a vertical fixing plate formed at the other end of the arch portion, and the fixing plate is the connecting plate. 2. The H-section steel cross-connecting structure according to claim 1, wherein the second H-section steel is joined in a T-shape to the first H-section steel by being bolted to each other while being joined to each other.   A flange portion above the web of the first H-section steel, wherein a notch is formed at a portion where the tip of the other H-section steel abuts, and a concave groove portion above the first H-section steel and another H-section steel The cross-connecting structure of H-section steel according to any one of claims 1 to 3, wherein the concave groove portion above is communicated.   5. An upper end of a connecting column using the cross-connecting structure of H-section steel according to claim 1, 2, or 4, wherein a plurality of bookshelves are provided side by side with a passage therebetween, and projecting above the top plate of each adjacent bookshelf The second H-shaped steel and the third H-shaped steel connected by a joint member are horizontally connected by mounting brackets, and the second H-shaped steel and the third H-shaped steel are cross-connected in a cross shape. An earthquake-resistant device for a bookshelf in which 1H-section steel is arranged along the middle of adjacent bookshelves and a lighting fixture is provided on the web of the first H-section steel. The middle part of the second H-shaped steel is connected horizontally to the upper end of the connecting column of the outermost bookshelf with a mounting bracket, and the tip of the second H-shaped steel that extends to the front side of the bookshelf is T-shaped by a joint member. The earthquake-proof device for a bookshelf according to claim 5, wherein the first H-section steel connected to the outside is arranged along the outside of the bookshelf and a lighting fixture is provided on the web of the first H-section steel.

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