JP2005036623A - Wide-flange shape steel reinforcing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wide-flange shape steel reinforcing tool being freely moved and removed and having a high strength. <P>SOLUTION: Metal plates formed in an approximately L-shaped cross section are connected mutually so as to form a pipy columnar body, and means moving the columnar body are mounted on one or both of the top face and underside of the columnar body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an H-shaped steel reinforcing tool having a length adjusting function used for the purpose of reinforcing the H-shaped steel when the H-shaped steel is used as a horizontal member in construction or civil engineering work.

  When using H-shaped steel as a horizontal member, when concentrated load is applied to a part of the horizontal member, local buckling, bending or twisting may occur near the point of action. In order to prevent such local damage, an H-shaped steel reinforcement has been conventionally used. In addition, when a narrow H-section steel is used as a girder, it is necessary to install a fall-preventing material between the H-sections in order to prevent the H-section steel from falling due to a horizontal load.

  In such a case, conventionally, as shown in FIG. 1, a stiffener plate 1 or the like having a fall prevention material mounting hole is installed between the flanges 3 and 3 'of the H-section steel 2 by welding or the like, and bolts Etc. and screwed between the H-shaped steel.

  In the case of the above conventional method, the stiffener plate is attached to the H-shaped steel by direct welding at the position specified in advance. Therefore, after installation, the installation position cannot be freely moved, and after use in lease etc. Had to be removed by fusing. For this reason, thermal distortion, residual welds, and other adverse effects on the H-shaped steel material are unavoidable, and the removed steel sheet becomes scrap.

  Moreover, when the stiffener plate is attached in advance, the H-shaped stacking is not possible during storage / transportation, so the stacking height is not only doubled, but the packaging during transport is unstable. There was a problem.

  This invention is made paying attention to such a point, and it aims at providing the high-strength H-shaped steel reinforcement tool which is free to move and detach.

  In the invention according to the first aspect of the present invention that meets the above-mentioned object, the metal plates formed in a substantially L-shaped cross section are connected to form a pipe-like columnar body, and one of the upper surface and the lower surface of the columnar body is connected. Alternatively, both are provided with means for moving the columnar body.

  The short side of the L-shaped metal plate is in contact with the long side of the other L-shaped metal plate to form a columnar body and a long-side plate-like body connected to the columnar body. It is good to form a fall prevention material attachment hole (Claim 2). In the present invention, since the fall prevention material may not be connected, the fall prevention material mounting hole is not necessarily required.

  It is preferable to connect and fix an L-shaped metal material having a required width defined by laws and regulations to the fall prevention material mounting hole.

  The means for moving the columnar body includes a nut threadedly engaged with a bolt standing on the plate, the bolt is fitted into the columnar body, and the nut is rotated to rotate the nut through the seat plate. It is good to comprise so that a body can be moved (Claim 4).

  The means for moving the columnar body includes a rotating member fitted to a rod standing on a plate and a moving member that moves by the rotation of the rotating member, and the rotating member and the moving member are cam surfaces. The moving member may come into contact with the cam mechanism and may be moved by a cam mechanism.

  A rotation stop pin is provided on the top of the bolt, and the rotation stop pin is fitted into a long hole formed in the columnar body so that the columnar body moves in the length direction but does not rotate. ).

  A spring is housed in the columnar body and the bolt is pulled by the spring so as to prevent troubles such as a finger being caught between the nut and the columnar seat plate. ).

  It is preferable to provide a shear pin having a protrusion at one end of one or both of the H-shaped steel flange contact portions of the columnar body.

  A cylindrical body formed in the center of a washer is fitted to the columnar body, a shear pin connected to a screw rod is accommodated in the cylindrical body, a nut is screwed into the screw rod protruding from the cylindrical body opening, It is preferable to fix the shear pin via a spring washer interposed between the bottom surface of the cylindrical body and the shear pin.

  According to the present invention, it is possible to obtain a thick-pipe-like columnar body with a protruding plate simply by combining and welding two L-shaped steel plates, and thus easily has arbitrary external dimensions and thicknesses. In addition to making it possible to produce pipe-like columnar bodies, it has become possible to produce H-shaped steel reinforcements that can be fitted with an integral fall-preventing material that was previously impossible. There is a tremendous effect that it is possible to easily reinforce horizontal members such as H-beams.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 shows an embodiment of the reinforcing tool 5 according to the present invention, in which the steel plates 6 and 6 ′ having an L-shaped cross-section obtained by bending a thick steel plate horizontally are inverted from one steel plate. Then, the short side of one L-shaped steel plate is welded and fixed such that the short side contacts the long side of the other L-shaped steel plate, and a square cylinder (columnar body) 7 is formed at the center and L A plate-like body 8 or 8 ′ in which the long side of the letter-shaped steel plate protrudes on both sides is formed. One plate-like body 8 protrudes toward the H-shaped steel web 18, and the other plate-like body 8 ′ protrudes in a direction opposite to the web 18 in parallel to the plate-like body 8. A plurality of mounting holes 9 are formed in the plate-like body 8 ′ at appropriate intervals, and groove steels 10 and 10 ′, which are anti-falling materials, are fixed to the mounting holes 9 with bolts 11. .

  Seat plates 12 and 12 ′ are welded and fixed to the upper and lower ends of the columnar body 7, and bolts 14 erected on the plate 13 are fitted and inserted into the columnar body 7 from one seat plate 12 ′. The nut 15 that is screwed to the nut 14 is rotated to move the columnar body 7 through the seat plate 12 ′ with the nut 15, so that the seat plate 12 can be firmly pressed inside the H-shaped steel flange 3. Has been. Even if the anti-rotation pin 16 is formed on the bolt 14 in advance, the anti-rotation pin 16 is inserted by inserting the bolt 14 so that the anti-rotation pin 16 is positioned at the corner of the columnar body 7 and then rotating the bolt 14 to prevent the anti-rotation pin 16. The pin 16 can protrude from the long hole 17.

  As shown in FIG. 2 (B), the reinforcing tool 5 of the present invention configured as described above is fixed to both sides of the H-shaped steel web 18 so as to be opposite to each other. This is because, as shown in FIG. 2C, the channel steels 10 and 10 'located on both sides of the web 18 are positioned on the same straight line. In addition, when providing the means to move the columnar body of the reinforcement tool of this invention both up and down, of course, it is not necessary to reverse in this way.

  An anti-rotation pin 16 is fixed to the upper part of the bolt 14, and the anti-rotation pin 16 is inserted into a long hole 17 formed in the columnar body 7, so that the columnar body 7 moves in the length direction but does not rotate. It is configured.

  FIG. 3 shows an example in which the length and width (A and B) of the cross-section of the columnar body are equal and a square columnar body 7 is formed, and the lengths of the short sides of the L-shaped steel plates 6 and 6 ′ are shown. By lengthening (FIG. 3B), a columnar body having a large cross section can be formed. Thus, the cross-sectional shape and cross-sectional performance according to need can be obtained by making the length of each side of the two L-shaped steel plates the desired arbitrary length.

  The reinforcing tool 5 of the present invention may be used without connecting the grooved steel 10, but in this case, as shown in FIG. 4, a columnar body (A> B) 7 having a rectangular cross section is formed, The through hole 9 is not formed in the plate-like body 8 ′.

  When the through-hole 9 is not formed in the plate-like body 8 ′, as shown in FIG. 5A, the plate-like bodies 8 and 8 ′ are bent in the same direction as the short side of the L-shaped steel plate. be able to. In this case, as shown in FIG. 5 (B), the short sides of the L-shaped steel plates 6 and 6 ′ are welded so as to contact the plate-like bodies 8 and 8 ′, respectively, so that the columnar body having a large cross section. It can be. In FIGS. 5A and 5B, the lengths (A1, A2) between the left and right sides of the columnar body and the lengths (B1, B2) between the top and bottom are the same. Of course it is good. However, with this configuration, a larger pipe-like columnar body can be obtained from the same weight material.

  The sides of the steel plates 6 and 6 ′ bent in the L shape of the present invention do not necessarily have to be linear, and may be curved.

  FIG. 6 shows another embodiment of the present invention, and shows an example in which a nut 15 ′ in which a rod is connected to a disc in a cross shape is used in place of the hexagon nut 15. In this way, the columnar body can be easily raised and lowered (moved).

  FIG. 7 shows another embodiment of the present invention, and shows an example in which the columnar body 7 is moved up and down (moved) by the cam mechanism. That is, the rod 14 'is erected on the plate 13', and the rotating member 20 to which the handle 19 is connected and the member 21 that moves up and down (moves) by contacting the rotating member and the cam surface are fitted to the rod 14 '. The member 21 connected to the handle is rotated, and the member 21 that moves up and down (moves) is moved up and down (moved) by the cam mechanism. By comprising in this way, it can be moved up and down quickly.

  FIG. 8 shows another embodiment of the present invention. A handle 19 'is connected to a member 21 that moves up and down (moves), the rod 14' in FIG. An example in which the member 21 ′ that moves up and down (moves) by the mechanism is moved up and down (moved), and then the handle 19 ′ is rotated to further move up and down (move) the member 21 ′ that moves up and down (moves). Indicates. If constituted in this way, it can be moved up and down (moved) quickly, and the amount of movement can be finely adjusted.

  FIG. 9 shows another embodiment of the present invention. A rod (lateral member) 22 is fixed to the top of the columnar body 7, and a locking tool 23 is fixed to the upper end of the bolt 14. An example in which the stopper 23 is connected by a coil spring 24 is shown.

  When the spring (coil spring) 24 is not attached, the columnar body 7 freely moves up and down, so that troubles such as pinching fingers between the nut 15 and the columnar seat plate 12 'may occur. Such a situation can be prevented by configuring.

  The main load applied to the reinforcing tool of the present invention is a vertical load, but the hollow pipe-like columnar body can sufficiently withstand this vertical load. Moreover, since it can be reduced in weight, it can be easily attached and detached manually.

  In the reinforcing tool of the present invention, a vertical load acts as a compressive load, but in order to obtain a necessary compressive strength, the outer dimensions and thickness of the cross section of the pipe-like columnar body may be selected.

  According to the present invention, since the pipe-like columnar body is formed, it is possible to provide a lightweight and highly rigid reinforcing tool. Thick pipe-shaped products are not available on the market, and it is not possible to attach fall prevention materials to thick-walled pipe products.

  The reinforcing tool of the present invention was invented to easily manufacture a thick pipe-like columnar body having an arbitrary outer dimension, and is an L-shaped steel plate formed by bending a steel plate having an arbitrary plate thickness into an L-shape with an arbitrary folding width. It is possible to obtain a thick pipe-like columnar body having a required cross-sectional dimension by integrating the two by means such as two-piece welding.

  By making one of the bent widths of the L-shaped steel plate longer and making a hole near the outer edge of the long side, the plate-like part to which the anti-tip material is attached as an integral part projecting outward from the pipe-like columnar body Can be configured.

  When the anti-tip material is attached to the H-section steel, the load introduced into the reinforcement is a horizontal load, so if you select the position where the plate on the opposite side contacts the H-section steel web, the horizontal compression load Flows to the H-shaped steel side through the reinforcing tool and does not act on the portion of the seat plate where the reinforcing tool is fixed to the H-shaped steel.

  As shown in FIG. 11, the H-shaped steel reinforcement is devised so as to be mounted and fixed at a position equal to approximately W / 4 of the H-shaped steel flange width (W). There is a problem that the drilling position D dimension of the mounting hole 9 provided in the plate-like bodies 8 and 8 ′ cannot secure the necessary width defined by the law.

  The fixing position of the H-shaped steel reinforcing tool is not the position of W / 4 in FIG. 11, but the side of the protruding plate-like body 8 is shortened by moving it toward the inside of the H-shaped steel, and the mounting hole is formed by lengthening the 8 'side. Although the 9 drilling position D dimension can be ensured to the required width stipulated by the law, this cannot secure the fixed position W / 4.

  FIGS. 10 and 11 show another embodiment of the present invention, and show an example in which an L-shaped metal material 25 having a required width defined by laws and regulations is connected and fixed to the fall prevention material mounting hole 9.

  As shown in FIG. 11B, the L-shaped metal material 25 is in close contact with the L-shaped steel plate 6 ′ with a bolt 26 between the grooved steel 10 (10 ′) and the L-shaped steel plate 6 ′ ( Polymerization).

  As shown in FIG. 11, among the loads acting on the anti-tip material, when a horizontal load (P) is applied, if it acts on the push side, the protruding plate-like body arranged on the inside is an H-section steel web. However, there may be a problem when a load acts on the tension side.

  That is, the tensile force (P) when acting as a tensile force in the outward direction with respect to the fixed position of the H-shaped steel reinforcement is P = N × μ [where P is the tensile force (kg · f), N Is the pressing force (kg · f), μ is the friction coefficient of the contact area (about 0.2 to 0.3)], and the allowable tensile load is the contact between the H-section steel and the H-section steel reinforcement It is determined by the friction coefficient μ of the portion and the pressing force N at the time of fastening and fixing the H-shaped steel reinforcing tool, and is about 20 to 30% of the pressing force.

  For example, when a tensile force P = 10,000 kg · f is set, a pressing force of 40,000 to 50,000 kg · f is required. In order to generate such a pressing force manually, a torque is applied to the screw. Granting is an extremely difficult task.

  As a result of diligent research, the present inventors have developed a mechanism that generates a shearing force at the contact portion between the H-shaped steel and the H-shaped steel reinforcing tool, instead of a method that expects a frictional force as described above.

  That is, it is a method of providing a shear pin having a protrusion at the tip on one or both of the H-shaped steel flange contact portions of the columnar body.

  FIG. 13 shows this embodiment, in which a cylindrical body 28 formed as a recess in the center of a disc-shaped washer 27 is fitted to the columnar body 7, and a shear pin 30 in which a screw rod 29 is connected to the cylindrical body 28. To accommodate. An opening is formed in the bottom surface of the cylindrical body 28, and a screw rod 29 that is connected to the lower end of the shear pin 30 protrudes from the opening.

A nut 31 is screwed onto the screw rod 29, and is tightened with the nut 31, whereby the shear pin 30 is inserted into the cylinder 28 via a pressing spring washer 32 interposed between the bottom surface of the cylinder 28 and the shear pin 30. It is fixed to.

  In the above embodiment, the disk-shaped washer 27 is in contact with the seat plate 12 welded and fixed to the upper end of the columnar body 7. However, the disc-shaped washer 27 may be directly fixed to the columnar body 7 without providing the seat plate 12.

  In the embodiment shown in FIGS. 13 to 15, an acute-angle annular protrusion 33 is provided at the tip of the shear pin 30. The acute angle annular projection 33 slightly bites into the H-shaped steel under the pressing force of the H-shaped steel reinforcing tool. Therefore, the shear pin 30 rotates the nut 15 of the H-shaped steel reinforcement to generate a pressing force, and when the tip of the shear pin 30 is brought into contact with the H-shaped steel, the biting of the seat plate 27 becomes possible. It protrudes from the surface. That is, in FIG. 13, it protrudes slightly even at the time of loading.

  In this situation, as shown in FIG. 11, when a tensile force (P) is applied in the horizontal direction, the biting portion generates (cross-sectional area) × shear stress = shear resistance, and the magnitude thereof is the same. Experiments have shown that the applied torque is about 5 times more effective than friction joints.

  Since the spring washer 32 not only holds the pressing force but also has a sharp edge at the tip of the shear pin 30, there is a slight biting phenomenon (generally referred to as familiarity) due to vibration or impact received during use. This is provided for the purpose of preventing the occurrence of looseness and the like and maintaining a constant pressing force at all times. However, when the operating pressure increases, a plurality of sheets may be used. FIG. 16 shows an example of a spring washer 32 used in the present invention.

  This shear pin / seat plate is used on the main body side of the H-shaped steel reinforcement 35. It is preferable to provide an annular projection having an acute tip at the portion of the opposite adjustment screw that contacts the H-shaped steel.

  FIG. 17 shows another embodiment of the shear pin 30 of the present invention, and shows an example in which a conical protrusion 34 is provided at the center of the acute angle annular protrusion 33 at the tip.

It is a front view which shows the conventional H-shaped steel reinforcement tool. BRIEF DESCRIPTION OF THE DRAWINGS (A) Front view which shows one Example of this invention, (B) Front view of the state attached to H-section steel, (C) Sectional drawing of the state attached to H-section steel. It is sectional drawing which shows the Example which forms a columnar body with two L-shaped steel plates. It is sectional drawing which shows the other Example which forms a columnar body with two L-shaped steel plates. It is sectional drawing which shows the other Example which forms a columnar body with two L-shaped steel plates. It is a front view which shows the other Example of this invention. It is a front view which shows the other Example of this invention. It is a front view which shows the other Example of this invention. It is sectional drawing which shows the other Example of this invention. (A) The top view of the state which removed the washer and the seat plate which show the other Example of this invention, (B) It is a front view. It is (A) front view and (B) sectional drawing which show the other Example of this invention. It is a front view of the H-shaped steel reinforcement tool of FIG. It is sectional drawing which shows the other Example of this invention. FIG. 14 is a plan view of FIG. 13. It is sectional drawing which shows the state which mounted | wore the columnar body with the washer of FIG. It is the top view and side view which show an example of the spring washer used for this invention. It is sectional drawing which shows the other Example of the shear pin of this invention.

Explanation of symbols

3, 3 '......... H-shaped steel flange 5 ......... Reinforcing tool 6, 6' of this invention ... L-shaped steel material 7 ......... Columnar body (tubular body)
8, 8 '......... Plate-like body 9 ......... Cylinder-shaped steel mounting holes 10, 10' ......... Cross-shaped steel 12, 12 '......... Seat plate 13 ......... Plate 14 ......... Bolt 14' ......... Rod 15 ......... Nut 16 ......... Rotation stop pin 17 ......... Long hole 20 ......... Rotating member 21 with handle connected ......... Member 14 'moved by cam mechanism ... Rod 25 ... …… L-shaped metal material 27 ............ disk-shaped washer 28 ............ cylinder 30 ............ shear pin 32 ............ spring washer 33 ............ annular protrusion

Claims (9)

Metal plates formed in a substantially L-shaped cross section are connected to form a pipe-like columnar body, and one or both of the upper surface and the lower surface of the columnar body are provided with means for moving the columnar body. Characteristic H-shaped steel reinforcement. The short side of the one L-shaped metal plate is in contact with the long side of the other L-shaped metal plate to form a columnar body and a plate-shaped body connected to the columnar body. The H-section steel reinforcing tool according to claim 1, wherein an overturn prevention material mounting hole is formed in one of the two. The H-shaped steel reinforcing tool according to claim 1 or 2, wherein an L-shaped metal material having a necessary width is connected and fixed to the fall prevention material mounting hole. The means for moving the columnar body includes a nut screwed into a bolt standing on the plate, and the bolt is fitted into the columnar body, and the nut is rotated to rotate the nut through the seat plate. The H-shaped steel reinforcing tool according to any one of claims 1 to 3, which is configured to be able to move a body. The means for moving the columnar body includes a rotating member fitted to a rod standing on the plate and a moving member that moves by the rotation of the rotating member, and the rotating member and the moving member are cam surfaces. The H-shaped steel reinforcing tool according to any one of claims 1 to 4, wherein the moving member is configured to come into contact with the cam mechanism to be moved. A detent pin is provided on the bolt or rod, and the detent pin is fitted in a long hole formed in the columnar body so that the columnar body moves in the length direction but does not rotate. Item 6. The H-shaped steel reinforcing tool according to Item 4 or 5. The H-shaped steel reinforcing tool according to any one of claims 1 to 6, wherein a spring is provided in the columnar body, and the bolt is pulled by the spring. The H-shaped steel reinforcing tool according to any one of claims 1 to 7, wherein a shear pin having a protrusion at a tip is provided on one or both of the H-shaped steel flange contact portions of the columnar body. A cylindrical body formed at the center of the washer is fitted to the columnar body, a shear pin connected to a screw rod is accommodated in the cylindrical body, and a nut is screwed onto the screw rod protruding from the cylindrical opening, The H-shaped steel reinforcing tool according to claim 8, wherein a shear pin is fixed via a spring washer interposed between the bottom surface of the cylindrical body and the shear pin so that the protrusion protrudes from the washer.

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