Hardware

Abstract

To provide a metal fitting capable of reducing the transportation cost of a steel column while supporting a steel beam when joining the steel beam to the steel column.MEANS: A metal fitting for temporarily receiving a steel frame beam, which is used for positioning when joining the steel frame beam to a steel frame column, includes a holding portion provided in the vicinity of a joining position between the steel frame column and the steel frame beam in the steel frame column, and the holding portion allows the steel frame beam to be placed on a support member by attaching the support member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to hardware for temporarily placing a steel beam when joining the steel beam to a steel column. [Background technology]

[0002] Techniques for joining steel beams to steel columns have been developed in the past (Patent Document 1). However, the technique disclosed in Patent Document 1 does not take into consideration supporting the steel beams when joining them to the steel columns. While it is conceivable to weld support members for supporting the steel beams to the steel columns, this requires the construction site to dispatch workers to weld the support members to the steel columns, which could increase labor costs. It is also conceivable to prepare steel columns with support members already welded to them in a factory and deliver the steel columns to the construction site, but because the support members protrude from the steel columns, the welded members may deform during transportation. Taking measures to prevent this deformation increases transportation costs, leaving room for further improvement. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-294862 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention was made in consideration of these problems, and its purpose is to provide hardware that can support steel beams when joining them to steel columns while reducing the transportation costs of the steel columns. [Means for solving the problem]

[0005] The hardware according to one embodiment of the present invention is a hardware for temporarily supporting a steel beam, which is used for alignment when joining a steel beam to a steel column, The steel column includes a retaining portion provided in the vicinity of a joint position between the steel column and the steel beam, The holding portion allows the steel beam to be placed on a support member by attaching the support member to the holding portion. [Effects of the Invention]

[0006] The hardware of the present invention makes it possible to support steel beams when joining them to steel columns while reducing the transportation costs of the steel columns. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic external view of a building 1. [Figure 2] 1 is a flowchart showing part of the procedure for steel frame construction. [Figure 3] FIG. 2 is a perspective view of a range A in FIG. 1 during steel frame construction according to the first embodiment. [Figure 4] FIG. 2 is a perspective view of a holding portion 31 and a support member 33 according to the first embodiment. [Figure 5] 6 is a view seen in the direction of arrow B in FIG. 5 in steps S3-S4. [Figure 6] 4 is a perspective view of another example of the first embodiment, seen in the direction of arrow C in FIG. 3 after a cover 35 has been attached. FIG. [Figure 7] FIG. 10 is a perspective view of a holding portion 231 and a support member 33 according to the second embodiment. [Figure 8] FIG. 10 is a perspective view of a holding portion 331 and a support member 333 according to the third embodiment. [Figure 9] FIG. 10 is a perspective view of a holding portion 331 and a support member 333 according to the third embodiment. [Figure 10] FIG. 10 is a perspective view of a holding portion 431 and a support member 433 according to a fourth embodiment. [Figure 11]FIG. 10 is a perspective view of a holding portion 431 and a support member 433 according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] First Embodiment A first embodiment of the present invention will be described below with reference to the drawings. In the drawings, for convenience of explanation, directions in space are indicated using three axes, XYZ. In particular, the Z direction corresponds to the direction of gravity (vertical direction), the +Z direction indicates an upward direction, and the -Z direction indicates a downward direction. The X direction and the Y direction are both perpendicular to the Z direction, i.e., correspond to the horizontal direction. The X direction and the Y direction are perpendicular to each other. Note that the X direction is not limited to the direction shown in the drawings and can be any direction within a horizontal plane, and the Y direction can also be any direction accordingly.

[0009] Referring to FIG. 1, a schematic external view of a building 1 is shown. The building 1 includes a foundation 3 and a main body 5. The foundation 3 is a supporting structure formed below ground level and made of, for example, concrete. The main body 5 is, for example, a warehouse supported by the foundation 3 and formed on the ground. The main body 5 includes a skeleton 11, walls 13, and a roof 15. The skeleton 11 includes a plurality of steel columns 21 extending in the +Z direction from the foundation 3 and a plurality of steel beams 23 (beams) extending in the X and Y directions between the plurality of steel columns 21. The steel columns 21 and the steel beams 23 are, for example, H-shaped steel. Note that the steel columns 21 and the steel beams 23 may also be square columns. The wall 13 is, for example, metal siding arranged on the side surface on the -Y side of the main body 5. The roof 15 is provided on top of the main body 5 and prevents raindrops and the like from entering the main body 5.

[0010] The skeleton 11 further includes a support unit 25. The support unit 25 supports one end of the steel beam 23 when the steel beam 23 is attached to the steel column 21. As shown in Fig. 4 described later, the support unit 25 includes a holding portion 31 and a support member 33. The specific configuration will be described later.

[0011] 2, there is shown a flowchart illustrating a part of the procedure for steel frame construction. In step S1, a steel frame column 21 is prepared (preparation step).

[0012] In step S2, the support members 33 are placed on the holding portions 31 of the steel column 21 (support member placing step).

[0013] Fig. 3 shows an exploded perspective view of range A in Fig. 1 during steel frame construction according to the first embodiment (for convenience of illustration, the view is rotated 90° around the Z axis with respect to Fig. 1). Also, Fig. 4 shows a perspective view of the holding portion 31 and the support member 33 according to the first embodiment.

[0014] The retaining portion 31 is an example of a metal part, and is made entirely of metal, for example. In this embodiment, the entire metal part constitutes the retaining portion 31, but the metal part may include structures or members other than the retaining portion 31.

[0015] The holding unit 31 has legs 41 and holding plates 43. The legs 41 are welded to the steel column 21, and the holding plates 43 support the support member 33. The legs 41 and the holding plates 43 are both formed, for example, in a flat plate shape. When the holding plates 43 are placed parallel to the YZ plane as shown in FIG. 4 , the legs 41 extend from both ends of the holding plates 43 in the horizontal direction (Y direction) in a direction perpendicular to the holding plates 43 (-X direction). In other words, the holding plates 43 extend from the ends of the legs 41. In the example shown in FIG. 4 , the legs 41 are provided over the entire Z-direction range of the holding plates 43, but may be provided over only a portion of the Z-direction range. The legs 41 are configured to extend from the steel column 21 when the holding unit 31 is attached to the steel column 21.

[0016] As shown in FIG. 4, the support member 33 has an insertion portion 45 and a support portion 47. The insertion portion 45 is a portion that is inserted into the gap between the leg portion 41 and the steel column 21, and the support portion 47 is a portion that supports the steel beam 23. The insertion portion 45 and the support portion 47 are both formed, for example, in a flat plate shape. When the insertion portion 45 is placed parallel to the YZ plane, the support portion 47 extends from one end (the end in the +Z direction) of the insertion portion 45 in a direction perpendicular to the insertion portion 45 (the +X direction). In particular, if the upper surface 33a (the surface on the +Z side) of the support portion 47 is formed so as to form part of a plane, the steel beam 23 can be suitably supported.

[0017] In step S3, the steel column 21 is erected on a base plate (not shown) of the foundation 3 (erecting step). Note that in step S3, the steel column 21 may be temporarily erected on the base plate by fastening a nut to a fastening bolt with a torque less than a specified torque, and the nut may be fully tightened with the specified torque in a later step.

[0018] Referring to FIG. 5, a view of steps S4 to S5 as viewed in the direction of arrow B in FIG. 3 (that is, the +Y direction) is shown.

[0019] As described above, when the support member 33 is placed on the holding portion 31 of the steel column 21 in step S2, the support portion 47 of the support member 33 protrudes in the +X direction. The support member 33 is inserted into the gap formed by the holding plate portion 43 and the steel column 21. It is preferable that the holding plate portion 43 is configured so that the support member 33 is inserted in the direction of gravity.

[0020] The holding portion 31 holds the support member 33, more specifically, holds the insertion portion 45 of the support member 33. Here, if the support portion 47 is configured to extend beyond the holding plate portion 43 (in the +X direction in the examples of FIGS. 4 and 5), the steel beam 23 can be efficiently supported by the smaller holding portion 31, which is preferable. In other words, it is preferable that the holding plate portion 43 (for example, the entire portion) be positioned closer to the steel column 21 than the portion 33b (FIG. 4) of the support member 33 that is farthest from the steel column 21 when the support member 33 is held.

[0021] In step S4 (see FIG. 2), one end of the steel beam 23 is temporarily placed on the support portion 47 of the support member 33. Here, the holding portion 31 is provided in the steel column 21 near the joint position between the steel column 21 and the steel beam 23.

[0022] Specifically, in step S4, the steel beam 23 is lifted to a position higher than the support member 33, for example, using a crane truck, and then one end of the steel beam 23 is temporarily placed on the support portion 47 of the support member 33 while gradually moving downward. In this way, the support member 33 is attached to the holding portion 31, thereby enabling the steel beam 23 to be placed on the support member 33. In this way, the holding portion 31 is used to temporarily support the steel beam 23. Note that it is preferable to similarly place the support member 33 on the steel column 21 at the other end of the steel beam 23 so that both ends of the steel beam 23 can be temporarily placed at the same time.

[0023] Then, in step S5 (see FIG. 2 ), the posture and position of the steel beam 23 in the Y and Z directions are finely adjusted, while the position in the X direction is finely adjusted, so that one end of the steel beam 23 abuts at a desired position on the steel column 21. Here, since the steel beam 23 is temporarily supported by the holding unit 31, the horizontal position of the steel beam 23 can be easily adjusted by applying a horizontal force to the steel beam 23 while reducing the external force applied to support the steel beam 23. In this way, using the holding unit 31 for alignment when joining the steel beam 23 to the steel column 21 makes the work more efficient.

[0024] Then, in step S6 (joining step), for example, a splice plate (not shown) of the steel column 21 and a splice plate 23a of the steel beam 23 are attached to each other and fixed by bolting. Note that as a method for joining the steel column 21 and the steel beam 23, welding may be used in addition to bolting, or both may be used.

[0025] Referring to FIG. 6, there is shown a perspective view seen in the direction of arrow C in FIG. 3 after the cover 35 has been attached.

[0026] The cover 35 is a member that can cover the holding portion 31 and the support member 33 from below and horizontally by being attached to the steel column 21 and the steel beam 23. The outer surface of the cover 35 may have an appearance similar to that of a reinforcing member. By attaching the cover 35, the welded portion between the steel column 21 and the steel beam 23 is hidden from the outside, making the appearance of the joint more beautiful.

[0027] As described above, the retaining portion 31 according to the first embodiment of the present invention is a metal fitting for temporarily supporting the steel beam 23 and used for aligning the steel beam 23 when joining the steel column 21 to the steel beam 23. The retaining portion 31 is provided in the steel column 21 near the joining position between the steel column 21 and the steel beam 23. The retaining portion 31 allows the steel beam 23 to be placed on the support member 33 when the support member 33 is attached to the retaining portion 31. This makes it possible to support the steel beam 23 when joining the steel column 21 to the steel beam 23, while reducing the transportation cost of the steel column 21. However, if the steel column 21 or the steel beam 23 has many protruding portions, there is a risk that the protruding portions and other members abutting against them will be deformed during transportation. Furthermore, if the steel column 21 or the steel beam 23 is loaded into a container or the like while taking these protruding portions into consideration, the amount of members that can be loaded into the container or the like will be reduced compared to when there are no protruding portions, resulting in increased transportation costs. For this reason, as in the first embodiment, by fixing only the holding portion 31 to the steel column 21 by welding at the time of manufacture (i.e., before transporting the steel column 21 and the steel beam 23), it is possible to reduce obstacles during transportation. Then, by attaching the support member 33 to the holding portion 31 at the construction site, it is possible to improve safety and workability during the steel beam joining work.

[0028] Moreover, the holding portion 31 according to the first embodiment has a leg portion 41 extending from the steel column 21 and a holding plate portion 43 extending from an end of the leg portion 41, and holds the support member 33 inserted into a gap formed by the leg portion 41, the holding plate portion 43, and the steel column 21. In this way, the support member 33 can be held with a simple structure.

[0029] In the first embodiment, the leg portion 41 is welded to the steel column 21. This allows the holding portion 31 to be firmly fixed to the steel column 21.

[0030] In the first embodiment, the holding plate portion 43 is located closer to the steel column 21 than the portion of the support member 33 that is farthest from the steel column 21 when the support member 33 is held. Therefore, the small holding portion 31 can efficiently support the large support member 33 (and thus the steel beam 23).

[0031] In the first embodiment, the support member 33 is inserted into the holding plate portion 43 in the direction of gravity, which makes it easy to attach the support member 33.

[0032] Second Embodiment 7 shows a perspective view of a holding portion 231 and a support member 33 according to the second embodiment. The shape of the holding portion 231 is different from the shape of the holding portion 31 of the first embodiment.

[0033] In the second embodiment, the support member 33 is configured to be easily removable after the steel beam 23 is attached to the steel column 21.

[0034] The holding portion 231 according to the second embodiment has a passing groove 244, a step portion 244a, a bottom portion 245, and an inclined portion 247. The passing groove 244 is a groove formed by cutting out, for example, the leg portion 41 on the -Y side according to the first embodiment. The dimension of this passing groove 244 in the X direction is larger than the dimension of the insertion portion 45 in the X direction. As a result, after the steel beam 23 is attached to the steel column 21, the support member 33 can be removed from the holding portion 231 by sliding the support member 33 laterally via the passing groove 244.

[0035] The step portion 244a is configured to extend from the holding plate portion 43 toward the steel frame column 21. However, when the holding portion 231 is attached to the steel frame column 21, a minimum gap sufficient for the insertion portion 45 of the support member 33 to pass through in the Y direction is provided between the step portion 244a and the steel frame column 21. This gap is preferably slightly larger than the thickness of the insertion portion 45 (for example, if the dimension of the passage groove 244 in the X direction is 50 mm to 100 mm, the dimension is approximately 1 mm to 10 mm larger). The bottom portion 245 extends from the lower (-Z direction) end of the holding plate portion 43 in a direction perpendicular to the holding plate portion 43 (-X direction). This bottom portion 245 forms the bottom of the holding portion 231. The inclined portion 247 is a surface that slopes downward from the bottom portion 245 toward the -Y direction.

[0036] By configuring the holding portion 231 in this manner, when placing the support member 33 in the holding portion 231, by abutting the insertion portion 45 of the support member 33 against the holding plate portion 43, the movement of the support member 33 in the Y direction is restricted by the step portion 244a, and the support member 33 can be prevented from falling off the holding portion 231 in steps S4 to S5.

[0037] Then, since the passage groove 244 is formed in the holding portion 231, the support member 33 can be removed after step S5 (for example, before step S6, but it may be after step S6). For example, by hitting the end of the support portion 47 against the steel column 21 with a hammer or the like, the insertion portion 45 can be removed without interfering with the step portion 244a. In this state, the support member 33 can be easily removed by hitting the support portion 47 in the -Y direction with a hammer or the like.

[0038] In this way, the holding portion 231 can removably hold the support member 33. This makes the appearance of the steel column 21 simpler after construction, and also allows the support member 33 to be reused.

[0039] Furthermore, in the second embodiment, since the bottom portion 245 is provided, even if the formation of the passage groove 244 causes the holding portion 231 to be cantilevered and the strength is reduced, it is possible to supplement the strength of the holding portion 231. As a modified example, a configuration in which the bottom portion 245 is not provided is also possible.

[0040] Furthermore, in the second embodiment, the inclined portion 247 is provided, which prevents water and dust from accumulating on the bottom portion 245. As a modified example, a configuration in which the inclined portion 247 is not provided is also possible.

[0041] <Third embodiment> 8 and 9, perspective views of a holding portion 331 and a support member 333 according to the third embodiment are shown.

[0042] The holding portion 331 according to the third embodiment has a holding plate portion 343, a bottom portion 345, and a temporary fastening portion 347. The holding portion 331 is also formed with a passage groove 344 through which the support member 333 moves in the horizontal direction. An inclined portion 342 is formed on the +Z side surface of the holding plate portion 343. An inclined portion 346 is formed on the +Z side surface of the bottom portion 345. The inclined portions 342 and 346 are inclined downward (in the -Z direction) toward the passage groove 344 (i.e., toward the -Y direction). The inclined portions 342 and 346 are inclined by φ (for example, 1°) with respect to the horizontal.

[0043] The temporary fastening portion 347 is formed with a pin hole 348 into which the pin 360 can be inserted. In this manner, the holding portion 331 is formed with the pin hole 348 into which the pin 360 can be inserted when the holding plate portion 343 holds the support member 333.

[0044] Support member 333 according to the third embodiment has vertical portion 351, support portion 353, and temporary fastening portion 357. An inclined portion 356 is formed on the -Z side surface of vertical portion 351. An inclined portion 354 is formed on the -Z side surface of support portion 353. Inclined portion 356 and inclined portion 354 are inclined downward (-Z direction) toward the -Y direction. Inclined portion 356 and inclined portion 354 are inclined at the same angle as φ (for example, 1°) with respect to the horizontal.

[0045] A pin hole 358 into which the pin 360 can be inserted is formed in the temporary fastening portion 357. In this manner, the support member 333 has the pin hole 358 formed therein into which the pin 360 can be inserted when the holding plate portion 343 holds the support member 333.

[0046] In the third embodiment, inclined portions 342, 346, 354, and 356 are provided. Therefore, holding portion 331 can support support member 333 by its surface (for example, inclined portion 342 supports inclined portion 354, and inclined portion 346 supports inclined portion 356). On the other hand, when removing support member 333, it can be easily removed along the inclinations.

[0047] In this way, the holding portion 331 can removably hold the support member 333. This makes the appearance of the steel column 21 simpler after construction, and also allows the support member 333 to be reused.

[0048] In the third embodiment, the holding portion 331 is formed with a passage groove 344 through which the support member 333 moves in the horizontal direction (Y direction), and the holding portion 331 and the support member 333 are formed with pin holes 348, 358 into which the pin 360 is inserted when the holding plate portion 343 holds the support member 333. Therefore, the support member 333 can be held more reliably when the pin 360 is in place, and the support member 333 can be more easily removed after the pin 360 is removed.

[0049] In the third embodiment, both the inclined portion 342 and the inclined portion 346 of the holding portion 331 are inclined, but as long as one of them is inclined, the other may have a structure that is not inclined (for example, a horizontal surface). In other words, at least a portion of the surface of the holding portion 331 that contacts the support member 333 may be configured to incline in the direction of gravity (more strictly, downward) as it moves in the direction in which the support member 333 moves (the -Y direction in the third embodiment). With this configuration, the support member 333 can be more easily removed.

[0050] In the third embodiment, temporary fastening portions 347, 357 are provided on the holding portion 331 and the support member 333, and by inserting a pin 360 through these, the holding portion 331 and the support member 333 are fixed together (FIG. 9 shows this state). Therefore, the support member 333 will not come off the holding portion 331 during the operations of steps S4 and S5. After step S5, the support member 333 can be easily removed by removing the pin 360.

[0051] <Fourth embodiment> 10 and 11, perspective views of a holding portion 431 and a support member 433 according to the fourth embodiment are shown.

[0052] The holder 431 according to the fourth embodiment can be the holder 31 according to the first embodiment, rotated 90° around the X-axis, for example. It is also possible to use a holder with dimensions or a shape different from that of the holder 31 according to the first embodiment. In the fourth embodiment, two support members 433 of the same shape are used as a set. Each support member 433 has a horizontal portion 451, a support portion 453, and a temporary fastening portion 448.

[0053] Support portion 453 is formed in a flat plate shape, and horizontal portion 451 extends perpendicular to support portion 453 (for example, in the Y direction) from one end (for example, the -X side end) of support portion 453. The length (Y direction dimension) of horizontal portion 451 can be the same as the Y direction dimension of holding portion 431, but it can also be configured to be shorter (in which case, it is preferable that it be longer than half the Y direction dimension of holding portion 431) or longer.

[0054] The horizontal portion 451 is formed so that its dimension in the Z direction is half or slightly smaller than the internal dimension in the Z direction of the holding portion 431, and the horizontal portions 451 of two support members 453 can be arranged on one holding portion 431 without interfering with each other ( FIG. 13 shows this state). In this way, by inserting the horizontal portions 451 from both sides of the holding portion 431 in the Y direction, the two support members 433 are held by the holding portion 431.

[0055] 11, with two support members 433 arranged on holding portion 431, temporary fastening portions 448 can be used to fasten support members 433 to holding portion 431. For example, by inserting a wire or rope (not shown) through two temporary fastening portions 448 and fastening them, it is possible to prevent the two support members 433 from moving away from each other (in the Y direction). This prevents support members 433 from coming off holding portion 431 during the operations of steps S4 and S5. After step S5, removing the wire or rope allows the two support members 433 to slide in the Y direction, making it easy to remove support members 433.

[0056] 11, the upper surfaces of all of the holding parts 431 and support members 433 are configured to be flush, and the upper surfaces of these can support the steel beam 23. As a modified example, the upper surfaces of the support members 433 may be configured to be located above the upper surfaces (or uppermost parts) of the holding parts 431, in which case one set of support members 433 supports the steel beam 23.

[0057] In this way, the holding portion 431 can removably hold the support member 433. This makes the appearance of the steel column 21 simpler after construction, and also allows the support member 433 to be reused.

[0058] In the fourth embodiment, the two support members 433 have the same shape, so that mixing up the members does not occur during installation. However, as a modified example, the two support members 433 may have different shapes. [Explanation of symbols]

[0059] 21 Steel column 23 Steel beam 31,231,331,431 Retaining part (metal) 33,333,433 Supporting member 41 Legs 43,343 Holding plate part 45 Insertion section 47 Support part 342, 346 Inclined portion (surface in contact with support member) 344 Passing groove 348,358 pin holes 360 pins

Claims

1. A metal fitting for temporarily supporting a steel beam, used for aligning when joining a steel beam to a steel column, The steel column includes a retaining portion provided in the vicinity of a joint position between the steel column and the steel beam, The holding portion allows the steel beam to be placed on the support member by attaching the support member to the holding portion. A metal object characterized by:

2. The holding portion is a leg extending from the steel column; a retaining plate portion extending from an end of the leg portion, Holds the support member inserted into the gap formed by the leg portion, the holding plate portion, and the steel column.

2. The hardware according to claim 1.

3. The leg is welded to the steel column.

3. The hardware according to claim 2.

4. The holding plate portion is located closer to the steel column than the portion of the support member (33) that is farthest from the steel column when the support member (33) is held.

3. The hardware according to claim 2.

5. The holding plate portion is configured such that the support member is inserted in the gravity direction.

2. The hardware according to claim 1.

6. The holding portion removably holds the support member.

2. The hardware according to claim 1.

7. The holding portion is formed with a passage groove through which the support member moves in a horizontal direction, The holding portion and the support member are formed with pin holes into which pins are inserted when the holding plate portion holds the support member.

7. The hardware according to claim 6.

8. The holding portion is formed with a passage groove through which the support member moves in a horizontal direction, At least a part of a surface of the holding portion that contacts the support member is inclined in the direction of gravity as it moves in the direction in which the support member moves.

7. The hardware according to claim 6.

Images