Temporary fixing method between steel column and beam steel frame and joining tool used for the same

Abstract

To provide a temporary fixing configuration between a steel column and a beam steel frame that can be utilized in a horizontally sliding way.SOLUTION: A temporary fixing method according to one embodiment comprises: a first process of moving a beam steel frame 14 with a first splice plate 30 pre-attached to an end of the beam steel frame 14 to a bracket 16 of a steel column 12 by a horizontally sliding way, thereby aligning the bracket and the beam steel frame in a longitudinal direction, and positioning the first splice plate above the bracket; a second process of positioning a base member 50 of a joining tool 10 on the first splice plate of the beam steel frame; and a third process of inserting a bolt 52 into a first bolt hole 50a of the base member, a first bolt hole 30a of the first splice plate 30, and a bolt hole 20a of the bracket of the steel column and temporarily fixing the beam steel frame 14 to the bracket 16.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present disclosure relates to a method for temporarily fixing a steel column and a steel beam and a fastening device used therefor. [Background technology]

[0002] In the construction of steel structures, there are many cases where steel columns and steel beams are assembled to construct a structure. This work is repeated for each floor to build a high-rise structure. In recent years, automated construction methods for steel construction have been widely proposed, and various technologies have been proposed to automatically transport steel beams to the designated position between steel columns.

[0003] Generally, in this steel frame construction method, steel columns are erected so as to extend vertically, and steel beams are moved between the steel columns, and the steel columns and the steel beams are joined and fixed. The method of hanging and joining the steel beams to the steel columns includes a drop-in method in which the steel beams are dropped into the steel columns from above to join the steel columns and a payment method in which the steel beams are moved approximately horizontally from a height near the installation position of the steel beams between the steel columns and inserted laterally.

[0004] For example, Patent Document 1 discloses a method for joining steel beams that is applied to the drop-in joining method. A bracket made of H-shaped steel is welded to the side of a steel column made of a square steel pipe. In the bracket, the end of the upper flange is set back from the end of the lower flange toward the inside of the bracket (toward the steel column) to form a first step, while the end of the beam is provided with a second step that is placed on the first step when erecting the beam on the bracket of the steel column. Then, the beam is dropped from above onto each bracket protruding from two steel columns while being suspended by a crane, so that the second steps at both ends of the beam are placed on the first step of each bracket, and the first step and the second step are engaged to form an engagement portion, and the beam is supported by the left and right brackets. Then, a splice plate is disposed across the bracket of the steel column and the beam, and the main joining is performed with high-strength bolts and nuts.

[0005] Patent Document 2 also discloses a method for temporarily fixing a steel column and a steel beam. In this temporary fixing method, the joining device described in Patent Document 2 is used to temporarily fix the steel column and the steel beam. This joining device has a configuration in which a tapered joining pin of a required length is integrally provided in a dangling state at the center of the lower surface side of a rectangular base plate, and has a mechanism for preventing the joining pin from coming off. In this temporary fixing method, a splice plate is attached to the upper end of the steel beam in advance with a required length protruding, and the joining pin and the anti-detachment member of the joining device are arranged so as to be positioned on at least one side of the protruding part of the splice plate, and the splice plate is also attached to the steel beam by a mounting bolt, and the steel beam is lifted by a required crane and transported to a position where it is to be installed, and at that position, the steel beam is lowered, and the joining pin is inserted into the bolt hole of the bracket of the steel column in cooperation with the anti-detachment member, and the hook-shaped part of the anti-detachment member enters the lower part of the upper flange of the bracket on the steel column side to be temporarily fixed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2023-82542 A [Patent Document 2] JP 2019-157526 A Summary of the Invention [Problem to be solved by the invention]

[0007] The above-mentioned technology in Patent Document 1 and the technology in Patent Document 2 are directed to a drop-in method in which a steel beam (beam) is dropped between steel columns from above to join the steel columns and the steel beam, and are not compatible with a payment-in method in which the steel beam is inserted laterally from a height near the attachment position of the steel beam between the steel columns. However, this payment-in method is often used to fix the steel beam between steel columns, for example, when there are many structural steel columns standing tall and it is difficult to hoist the steel beam high with a crane. Therefore, there is a demand for a method of temporarily fixing a steel column and a steel beam that can be applied to this payment-in method.

[0008] An object of the present disclosure is to provide a structure for temporarily fixing a steel column and a steel beam that can be used by a payment method. [Means for solving the problem]

[0009] One aspect of the present disclosure is A method for temporarily fixing a steel column and a steel beam, comprising the steps of: A first step is to move the beam steel, to which a first splice plate is attached in advance to an end of the beam steel by a required length in the longitudinal direction of the beam steel, relative to the bracket of the steel column by a pushing method, thereby aligning the bracket and the beam steel in the longitudinal direction and positioning the first splice plate above the bracket; A second step of positioning a base member of a splice device on the first splice plate of the beam steel; a third step of inserting bolts into a first bolt hole of the base member, a first bolt hole of the first splice plate, and a bolt hole of the bracket of the steel column to temporarily fix the steel beam to the bracket; Including, Temporary fixing method for steel columns and steel beams to provide.

[0010] According to the temporary fixing method having the above-mentioned configuration, in a first step, the beam steel frame to which the first splice plate is attached is moved relative to the bracket of the steel column by a pushing method, thereby aligning the bracket and the beam steel frame in the longitudinal direction of the beam steel frame and positioning the first splice plate above the bracket, in a second step, the base member of the connecting device is positioned on the first splice plate of the beam steel frame, and in a third step, bolts are inserted into the first bolt hole of the base member, the first bolt hole of the first splice plate, and the bolt hole of the bracket of the steel column, thereby temporarily fixing the beam steel frame to the bracket of the steel column.

[0011] For example, the beam steel is formed of an H-shaped steel having a web, an upper flange, and a lower flange, and the bracket of the steel column is formed of an H-shaped steel having a web, an upper flange, and a lower flange. In this case, the temporary fixing method may include, before the first step, arranging the first splice plate so as to contact the upper side of the upper flange of the beam steel, arranging the second splice plate so as to contact the lower side of the upper flange of the beam steel, and inserting bolts into the bolt holes of the first splice plate, the bolt holes of the upper flange of the beam steel, and the bolt holes of the second splice plate, and may include a fourth step of temporarily fixing the first splice plate and the second splice plate so as to sandwich the upper flange of the beam steel. In this case, the third step may include inserting bolts into the first bolt hole of the base member of the connecting device placed on the first splice plate of the beam steel, the first bolt hole of the first splice plate, the bolt hole of the bracket of the steel column, and the first bolt hole of the second splice plate to temporarily fix the beam steel to the bracket. According to these configurations, the bracket of the steel column and the beam steel can be temporarily fixed using the connecting device by sandwiching the upper flange of the bracket of the steel column and the upper flange of the beam steel between the first splice plate and the second splice plate.

[0012] Preferably, the fourth step includes arranging a third splice plate protruding in the longitudinal direction of the beam steel frame by a second required length so as to contact the lower side of the bottom flange of the beam steel frame, arranging a fourth splice plate so as to contact the upper side of the bottom flange of the beam steel frame, inserting bolts into bolt holes of the third splice plate, bolt holes of the bottom flange of the beam steel frame, and bolt holes of the fourth splice plate, and temporarily fixing the third splice plate and the fourth splice plate so as to sandwich the bottom flange of the beam steel frame. According to this configuration, the third splice plate and the fourth splice plate can be attached to the bottom flange of the beam steel frame in advance, and work efficiency can be improved.

[0013] Preferably, in the fourth step, the second splice plate or the fourth splice plate is temporarily fixed to the steel beam such that a free end of the second splice plate or the fourth splice plate faces an end of the steel beam opposite to the end of the steel beam to which the second splice plate or the fourth splice plate is temporarily fixed in the longitudinal direction, based on a temporarily fixed portion of the second splice plate or the fourth splice plate to the steel beam. This makes it possible to more suitably prevent the second splice plate or the fourth splice plate from interfering with the bracket of the steel column when the steel beam is moved in the payment method.

[0014] Preferably, the temporary fixing method further includes a fifth step of inserting bolts into the second bolt holes of the base member of the joint device placed on the first splice plate of the beam steel, the second bolt holes of the first splice plate, and the bolt holes of the beam steel. With this configuration, the bracket of the steel column and the beam steel can be temporarily fixed more firmly.

[0015] The technology of the present disclosure also resides in the aforementioned fastening tool used in the aforementioned method for temporarily fastening a steel column and a steel beam. This fastening tool may include the base member, the first bolt hole formed in the base member, and a second bolt hole formed in the base member, the second bolt hole extending in the same direction as the first bolt hole. In this case, the distance between the first bolt hole and the second bolt hole may be related to the distance between the bolt hole of the bracket of the steel column and the bolt hole of the steel beam arranged next to the bracket. For example, the base member may include a flat plate-shaped member. Effect of the Invention

[0016] According to the above aspect of the above configuration, it is possible to temporarily fix the steel beams between the steel columns by moving the steel beams between the steel columns using a pushing-in method. [Brief description of the drawings]

[0017] [Figure 1] FIG. 4 is a perspective view showing a process of moving a steel beam relative to a bracket of a steel column in the first embodiment. [Diagram 2] FIG. 2 is a perspective view showing the bracket-attached steel column of FIG. 1. [Diagram 3] 2 is a perspective view showing one end side of the steel beam in FIG. 1, seen from below. [Figure 4] 2 is a perspective view showing one end side of the steel beam in FIG. 1, seen from above. [Diagram 5] This is a schematic cross-sectional view showing the movement of a steel beam to the bracket side of a steel column by a payment method, and is a cross-sectional view taken along line VV in Figure 1. [Figure 6] 1A and 1B show a base member of a joining device according to a first embodiment, in which (a) is a plan view of the base member, and (b) is a front view of the base member. [Figure 7] 1A and 1B show a bolt of a fastener according to a first embodiment, in which (a) is a front view of the bolt, and (b) is a right side view of the bolt. [Figure 8]7A and 7B are schematic diagrams showing a method of temporarily fixing a steel column and a steel beam in the first embodiment, in which (a) shows the beam steel with a splice plate being moved between the steel columns, (b) shows the lower splice plate of the upper flange of the steel beam being closed, (c) shows the base member of FIG. 6 being placed on the upper splice plate of the upper flange of the steel beam, (d) shows the bolts on the steel column side being attached, and (e) shows the bolts on the steel beam side being attached. [Figure 9] 8(e) is a partially enlarged view of the area around the joint device at the joint between the steel column and the steel beam, where (a) is a plan view and (b) is a cross-sectional view taken along line IXB-IXB in (a). [Figure 10] 4 is a flowchart of a method for temporarily fixing a steel column and a steel beam according to the first embodiment. [Figure 11] FIG. 11 is a perspective view from below showing one end of a steel beam that is moved and attached to a bracket of a steel column in the second embodiment, and corresponds to FIG. 3 in the first embodiment. [Figure 12] FIG. 11 is a schematic diagram showing a part of a method for temporarily fixing a steel column and a steel beam in accordance with a second embodiment, in which (a) shows a state in which a steel beam with a splice plate has been moved between the steel columns, and (b) shows a state in which the lower splice plate of the upper flange of the steel beam has been closed and the upper splice plate of the lower flange of the steel beam has been closed. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present disclosure will be described with reference to the accompanying drawings. The same components or configurations are denoted by the same reference numerals, and have the same names and functions. Therefore, detailed description thereof will not be repeated.

[0019] A structure and method for temporarily fixing a steel column 12 and a steel beam 14 using a joint device 10 according to a first embodiment of the present disclosure will be described with reference to Figs. 1 to 10 .

[0020] First, the movement of the steel beams 14 between the steel columns 12 by the payment method will be described with reference to Figs. 1 to 5.

[0021] As shown in Figs. 1 and 2, the steel column 12 is formed of a square steel pipe, and a bracket 16 is welded to its side. The bracket 16 of the steel column 12 can be considered as an example of a steel beam. The bracket 16 is formed of an H-shaped steel having a web 18, an upper flange 20, and a lower flange 22. Therefore, the web 18 is located between the upper flange 20 and the lower flange 22, and is approximately perpendicular to each of the upper flange 20 and the lower flange 22. The upper flange 20 and the lower flange 22 each have a plurality of bolt holes 20a, 22a. The upper flange 20 has six bolt holes, and has three bolt holes 20a arranged in a row spaced apart in the longitudinal direction 16A on each side of the web 18. Similarly, the lower flange 22 has six bolt holes 22a, and has three bolt holes 22a arranged in a row spaced apart in the longitudinal direction 16A on each side of the web 18. The number and arrangement of the bolt holes 20a, 22a in the upper flange 20 and the lower flange 22 of the bracket 16 are not limited to this, and multiple bolt holes 20a, 22a can be set arbitrarily in the upper flange 20 and the lower flange 22 of the bracket 16.

[0022] For example, at a construction site where steel columns 12 having such brackets 16 stand in a row, a steel beam 14 is erected between the steel columns 12. The steel beam 14 is formed of an H-shaped steel having the same dimensions and specifications as the brackets 16, and more specifically, is formed of an H-shaped steel having a web 24, an upper flange 26, and a lower flange 28. Therefore, the web 24 is located between the upper flange 26 and the lower flange 28, and forms a substantially right angle with each of the upper flange 26 and the lower flange 28. The upper flange 26 and the lower flange 28 each have a plurality of bolt holes 26a, 28a. The upper flange 26 has six bolt holes 26a, and has three bolt holes 26a arranged in a row spaced apart in the longitudinal direction 14A on each side of the web 24. Similarly, the lower flange 28 has six bolt holes 28a, with three bolt holes 28a arranged in a row spaced apart in the longitudinal direction 14A on each side of the web 24. Note that the number and arrangement of the bolt holes 26a, 28a in the upper flange 26 and the lower flange 28 of the beam steel frame 14 are not limited to this, and multiple bolt holes 26a, 28a can be set arbitrarily in the upper flange 26 and the lower flange 28 of the beam steel frame 14.

[0023] The beam steel frame 14 is fixed at both ends to the corresponding steel columns 12. In the following, with regard to the temporary fixing of the beam steel frame 14 between the steel columns 12, the temporary fixing of the beam steel frame 14 to one of the two steel columns 12 at both ends of the beam steel frame 14 will be explained, and the explanation of the temporary fixing of the beam steel frame 14 to the other steel column 12 will be omitted.

[0024] In order to connect with the bracket 16 attached to the steel column 12, a splice plate (hereinafter, upper splice plate) 30 is attached in advance to the end of the steel beam 14 with a required length protruding in the longitudinal direction 14A. The upper splice plate 30 corresponds to the first splice plate. The upper splice plate 30 is placed on the upper side of the upper flange 26 of the steel beam 14 and attached. The upper splice plate 30 is a rectangular flat member, and has bolt holes 30a formed therein that correspond to the bolt holes 20a of the upper flange 20 of the bracket 16 of the steel column 12 and the bolt holes 26a of the upper flange 26 of the steel beam 14. In the longitudinal direction 14A of the steel beam 14, the upper splice plate 30 is provided with two rows of bolt holes 30a, and each row has six bolt holes 30a. Of the six bolt holes 30a in each row, the three bolt holes 30a on the side of the beam steel frame 14 are used for joining to the beam steel frame 14, and the three bolt holes 30a on the side of the bracket 16 are used for joining to the bracket 16 of the steel column 12. However, the number and arrangement of the bolt holes 30a in the upper splice plate 30 are not limited to this, and multiple bolt holes 30a can be set in the upper splice plate 30 as desired.

[0025] In addition, in the first embodiment, in order to further strengthen the joint connection between the steel column 12 and the steel beam 14, not only the splice plate 30 on the upper surface side of the upper flange 26 but also splice plates (hereinafter, lower splice plates) 32, 34 on the lower surface side of the upper flange 26 are added. The lower splice plates 32, 34 correspond to the second splice plates. Since the bracket 16 and the steel beam 14 have webs 18, 24, respectively, the lower splice plates 32, 34 are elongated rectangular flat members having the same length as the upper splice plate 30 and a width less than half that of the upper splice plate 30. The lower splice plates 32, 34 have bolt holes 32a, 34a formed therein, which correspond to the bolt holes 20a of the upper flange 20 of the bracket 16 of the steel column 12 and the bolt holes 26a of the upper flange 26 of the steel beam 14, respectively. The lower splice plates 32, 34 are provided with bolt holes 32a, 34a arranged in a row. The number of bolt holes 32a, 34a of the lower splice plates 32, 34 is six. The bolt holes 32a, 34a of the lower splice plates 32, 34 are formed at the same intervals as the bolt holes 30a of the upper splice plate 30. Here, the lower splice plate 32 has three bolt holes 32a for attachment to the bracket 16 of the steel column 12 and three bolt holes 32a for attachment to the beam steel frame 14, which are arranged in a row spaced apart from each other, so as to correspond to the arrangement of the bolt holes 20a, 26a, 30a described above. Similarly, the lower splice plate 34 has three bolt holes 34a for attachment to the bracket 16 of the steel column 12 and three bolt holes 34a for attachment to the beam steel frame 14, which are arranged in a row spaced apart from each other. However, the number and arrangement of the bolt holes 32a, 34a of the lower splice plates 32, 34 are not limited to this, and the lower splice plates 32, 34 can each have a plurality of bolt holes 32a, 34a set as desired.

[0026] The upper splice plate 30 and the lower splice plates 32, 34 are attached to the beam steel frame 14 by using two connecting bolts 36, 38. The connecting bolt 36 is inserted through the bolt hole 30a located on one end side of the upper splice plate 30 (here, the bolt hole located closest to the beam steel frame 14), the corresponding bolt hole 26a in the upper flange 26 of the beam steel frame 14, and the corresponding bolt hole 32a located on one end side of the lower splice plate 32, and is temporarily fastened (temporarily fixed) by tightening a nut 36N. The other connecting bolt 38 is inserted through the other bolt hole 30a located on one end side of the upper splice plate 30 (here, the bolt hole located closest to the beam steel frame 14), the corresponding bolt hole 26a in the upper flange 26 of the beam steel frame 14, and the corresponding bolt hole 34a located on one end side of the lower splice plate 34, and is temporarily fastened by tightening a nut 38N. At this time, the lower splice plates 32, 34 are preferably temporarily fixed to the beam steel frame 14 by spreading them laterally so as to face the other end (not shown) of the beam steel frame 14, as shown in Figs. 3 and 4, so as not to protrude from the tip side in the longitudinal direction 14A of the beam steel frame 14. In other words, the lower splice plates 32, 34 are preferably temporarily fixed to the beam steel frame 14 so that the free ends 32F, 34F of the lower splice plates 32, 34 face the end (not shown) opposite to the end 14E of the beam steel frame 14 to which they are temporarily fixed, in the longitudinal direction 14A of the beam steel frame 14, based on the temporary fixing parts 36a, 38a fixed by the connecting bolts 36, 38. This makes it possible to more reliably prevent the lower splice plates 32, 34 from interfering with the bracket 16 of the steel column 12 when the beam steel frame 14 is moved in the later-described payment method.

[0027] In this way, the beam steel frame 14 to which the upper splice plate 30 and the lower splice plates 32, 34 are attached is lifted by a required crane (lifting device) and transferred to the position between the steel columns 12, 12 to be installed (erected), and the ends of the bracket 16 of the steel column 12 and the beam steel frame 14 are butted together. In this butted state, the bracket 16 of the steel column 12 and the beam steel frame 14 are installed in a straight line, with the upper surface of the upper flange 20 of the bracket 16 and the upper surface of the upper flange 26 of the beam steel frame 14 abutting against the lower surface of the upper splice plate 30. At this time, the beam steel frame 14 suspended by the required crane with the rope 40 is transferred to the outside in the lateral direction between the steel columns 12, 12, and is rotated by a (not shown) interlocking rope as necessary. 1 and 5, particularly as shown by the arrow in Fig. 5, the position of the steel beam 14 is finely adjusted by sliding the steel beam 14 laterally, that is, by moving the steel beam 14 by a pushing-in method, and drawing it between the steel columns 12, 12. As a result, the ends of the bracket 16 of the steel column 12 and the steel beam 14 are butted together, and the bracket 16 and the steel beam 14 are in a straight line, that is, lined up in the longitudinal direction 14A of the steel beam 14. A side view of the joint between the bracket 16 of the steel column 12 and the steel beam 14 in this state is shown in Fig. 8(a).

[0028] Here, the joint device 10 used for temporarily fixing the joint between the bracket 16 of the steel column 12 and the steel beam 14 will be described with reference to Figs.

[0029] The joining tool 10 is configured to include a base member 50, two bolts 52, 54, and two nuts 56, 58 (see FIG. 9). Fig. 6 shows the base member 50 of the joining tool 10, with Fig. 6(a) being a plan view of the base member 50 and Fig. 6(b) being a front view of the base member 50. Fig. 7 shows the bolt 52 (or 54), with Fig. 7(a) being a front view of the bolt 52 and Fig. 7(b) being a right side view of the bolt 52.

[0030] The base member 50 is a flat plate-like member, and is a flat plate-like member having a generally oval shape stretched in one direction. The base member 50 has two bolt holes 50a, 50b. The interval between these bolt holes 50a, 50b corresponds to the interval between the bolt hole 20a at the most distal end of the bracket 16 of the steel column 12 and the bolt hole 26a at the most distal end of the beam steel frame 14 aligned with the bolt hole 20a when the ends of the bracket 16 of the steel column 12 and the beam steel frame 14 are in a butted state. Therefore, when one bolt hole 50a is aligned with the bolt hole 30a of the upper splice plate 30, the bolt hole 20a of the upper flange 20 of the bracket 16 of the steel column 12, and the bolt hole 34a of the lower splice plate 34, a bolt 52 can be inserted so as to pass through them, and a nut 56 can be screwed onto the male thread portion 52a of the bolt 52. When the other bolt hole 50b is aligned with the bolt hole 30a of the upper splice plate 30, the bolt hole 26a of the upper flange 26 of the beam steel frame 14, and the bolt hole 34a of the lower splice plate 34, the bolt 54 can be inserted so as to penetrate them, and the nut 58 can be screwed onto the male thread portion 54a of the bolt 54. In the following description, the bolt corresponding to one of the bolt holes 50a of the base member 50 is given the reference number "52", the nut is given the reference number "56", the bolt corresponding to the other bolt hole 50b is given the reference number "54", and the nut is given the reference number "58", but the bolt 52 has the same configuration and dimensions as the bolt 54, and the nut 56 has the same configuration and dimensions as the nut 58.

[0031] A hole forming portion 50d is formed on one end face, i.e., the surface 50c, of the base member 50. The hole forming portion 50d defines and forms a hole 50e therein. Here, the hole forming portion 50d is integrally provided on the base member 50 by bending and welding a wire. The hole forming portion 50d is positioned so as to be located approximately midway between the bolt holes 50a and 50b in the longitudinal direction 50f of the base member 50, but may be provided at other positions. Note that a hole 50e may be provided in the base member 50 itself at a location away from the bolt holes 50a and 50b, and the surrounding portion may be configured as the hole forming portion 50d. Note that this hole 50e is one through which a rope or the like can be passed, and may be used, for example, for an operator to hold the base member 50 with a rope or the like.

[0032] The bolt 52 is configured such that a hexagonal head 52b, a cylindrical portion 52c, the male threaded portion 52a, and a tip pin portion 52d are arranged in this order in the axial direction 52e of the bolt 52. The tip pin portion 52d is thinner than the male threaded portion 52a. A nut 56 can be screwed onto the male threaded portion 52a. Similarly, the bolt 54 is configured such that a hexagonal head 54b, a cylindrical portion 54c, the male threaded portion 54a, and a tip pin portion 54d are arranged in this order in the axial direction 54e of the bolt 54. The tip pin portion 54 is thinner than the male threaded portion 54a. A nut 58 can be screwed onto the male threaded portion 54a.

[0033] The bolts 52, 54 are inserted into the corresponding bolt holes from the inside to the outside of the bracket 16 of the steel column 12 or the steel beam 14, respectively, and the nuts 56, 58 are preferably positioned on the upper side, i.e., the outside, of the upper flange 20 of the bracket 16 of the steel column 12 or the upper flange 26 of the steel beam 14. However, the technology of the present disclosure allows the bolts 52, 54 to be attached in the opposite direction.

[0034] The structure and method for temporarily fixing the bracket 16 of the steel column 12 to the steel beam 14 using the joint device 10 having the above-mentioned configuration will be described with reference to Figs.

[0035] Fig. 8(a) shows the state in which the bracket 16 of the steel column 12 and the steel beam 14 are butted against each other at their ends, and the bracket 16 and the steel beam 14 are aligned in a straight line, as described above. Fig. 8(b) shows the state in which the lower splice plates 32, 34 are moved toward the web 18 of the bracket 16 of the steel beam 12 to close the bracket 16, while loosening the connecting bolts 36, 38 as necessary, in the state shown in Fig. 8(a).

[0036] 8(b), first, the base member 50 of the connecting tool 10 is positioned on the upper splice plate 30, that is, on its surface. As a result, the base member 50 is placed on the upper splice plate 30.

[0037] Then, the bolt 52 is fastened to the bolt hole 50a of the base member 50 on the bracket 16 side of the steel column 12. That is, as shown in Fig. 8(d), at this time, the bolt hole 50a of the plate member 50 is aligned with the bolt hole 30a of the upper splice plate 30, the bolt hole 20a of the upper flange 20 of the bracket 16 of the steel column 12, and the bolt hole 32a of the lower splice plate 32, and the bolt 52 is inserted so as to penetrate them, and the nut 56 is screwed onto the male thread portion 52a of the bolt 52.

[0038] Then, a bolt 54 is fastened to the bolt hole 50b of the base member 50 on the side of the beam steel frame 14. That is, as shown in Fig. 8(e), the other bolt hole 50b of the base member 50 is aligned with the bolt hole 30a of the upper splice plate 30, the bolt hole 26a of the upper flange 26 of the beam steel frame 14, and the bolt hole 32a of the lower splice plate 32, and the bolt 54 is inserted so as to penetrate them, and a nut 58 is screwed onto the male thread portion 54a of the bolt 54.

[0039] This completes the temporary fixing of the steel column 12 and the steel beam 14 using the joint fixture 10. A partial enlarged view of the connection between the bracket 16 of the steel column 12 and the steel beam 14 at this time is shown in FIG. 9. FIG. 9 is a partial enlarged view of the periphery of the joint fixture of the joint between the steel column and the steel beam in the state of FIG. 8(e), FIG. 9(a) is a plan view, and FIG. 9(b) is a cross-sectional view taken along line IXB-IXB in FIG. 9(a). As shown in FIG. 9, the base member 50 of the joint fixture 10 is positioned above the lower splice plate 32, not on the lower splice plate 34 side, but may be positioned above the lower splice plate 34. In addition, the hole forming portion 50d of the base member 50 is arranged to face inward, but it is also acceptable for the hole forming portion 50d to face outward.

[0040] Thereafter, required connecting bolts (e.g., high-strength bolts) are fitted into each bolt hole 30a of the upper splice plate 30, the bolt holes 20a of the corresponding upper flange 20 of the bracket 16 of the steel column 12, and the corresponding bolt holes 32a, 34a of the lower splice plates 32, 34. Also, required connecting bolts (e.g., high-strength bolts) are fitted into each bolt hole 30a of the upper splice plate 30, the bolt holes 26a of the corresponding upper flange 26 of the beam steel 14, and the corresponding bolt holes 32a, 34a of the lower splice plates 32, 34. Then, after this connection, the bolts 52, 54 in the connecting device 10 can be removed, and the connecting device 10 can be completely removed. Then, connecting bolts (e.g., high-strength bolts) are inserted and tightened into each of the remaining bolt holes 30a after removal, as described above, and as has been done conventionally, splice plates are manually placed on both sides of the lower flanges 22 and 28 on the lower side of the connection between the beam steel frame 14 and the bracket 16, and connecting bolts (e.g., high-strength bolts) are attached to each bolt hole, so that the beam steel frame 14 can be firmly attached between the steel columns 12.

[0041] The above-mentioned method of temporarily fixing the steel column 12 and the steel beam 14 will be described again based on the flow chart of FIG. 10 while referring to FIG.

[0042] As shown in Figures 1, 3 and 4, the upper splice plate 30 is placed on the end of the beam steel 14, particularly on the top end thereof, and the lower splice plates 32, 34 are placed under the upper flange 26 and temporarily fastened with bolts 36, 38 (step S1001 in Figure 10). Then, as shown in Figure 5, the beam steel 14 is moved between the steel columns 12, more specifically between the brackets 16, by a push-in method (Figure 8(a), step S1003 in Figure 10). Next, the lower splice plates 32, 34 are moved to a predetermined position so as to close toward the web 18 (Figure 8(b), step S1005 in Figure 10).

[0043] Then, the base member 50 of the connecting device 10 is placed on the upper splice plate 30 (Figure 8(c) and step S1007 in Figure 10), the bolt 52 on the bracket 16 side of the steel column 12 is attached (Figure 8(d) and step S1009 in Figure 10), and the bolt 54 on the beam steel 14 side is attached (Figure 8(e) and step S1011 in Figure 10).

[0044] Note that step S1001 in Fig. 10 corresponds to the fourth step in the method for temporarily fixing a steel column to a steel beam in the technology of the present disclosure. Step S1003 in Fig. 10 corresponds to the first step in the method for temporarily fixing a steel column to a steel beam in the technology of the present disclosure, step S1007 in Fig. 10 corresponds to the second step in the method for temporarily fixing a steel column to a steel beam in the technology of the present disclosure, and step S1009 in Fig. 10 corresponds to the third step in the method for temporarily fixing a steel column to a steel beam in the technology of the present disclosure. Furthermore, step S1011 in Fig. 10 corresponds to the fifth step in the method for temporarily fixing a steel column to a steel beam in the technology of the present disclosure.

[0045] According to the method for temporarily fixing the steel column 12 and the steel beam 14 having the above-mentioned configuration, the following effects are achieved.

[0046] The above-mentioned temporary fixing method includes the steps of: moving the beam steel frame 14, on which the first splice plate, the upper splice plate 30, has been placed and attached to the end, i.e., the top end, of the upper flange 26 of the beam steel frame 14 with the required length protruding in the longitudinal direction 14A of the beam steel frame 14, relative to the bracket 16 of the steel column 12 by a pushing-in method, thereby aligning the bracket 16 and the beam steel frame 14 in the longitudinal direction 14A and positioning the upper splice plate 30 above the bracket 16; positioning the base member 50 of the connecting device 10 on the upper splice plate 30 of the beam steel frame 14; and inserting bolts 52 into the bolt holes 50a (first bolt holes) of the base member 50, the corresponding bolt holes 30a (first bolt holes) of the upper splice plate 30, and the corresponding bolt holes 20a of the upper flange 20 of the bracket 16 of the steel column 12, to temporarily fix the beam steel frame 14 to the bracket 16. Therefore, the beam steel frame 14 with the upper splice plate 30 attached is moved relative to the bracket 16 of the steel column 12 by the pushing-in method, whereby the bracket 16 and the beam steel frame 14 are aligned in the longitudinal direction 14A of the beam steel frame 14 and the upper splice plate 30 is positioned above the bracket 16.The base member 50 of the connecting device 10 is then positioned on the upper splice plate 30 of the beam steel frame 14.Furthermore, bolts 52 are inserted into the first bolt hole 50a of the base member 50, the bolt hole 30a of the upper splice plate 30, and the bolt hole 20a of the bracket 16 of the steel column 12, thereby temporarily fixing the beam steel frame 14 to the bracket 16 of the steel column 12.

[0047] The beam steel frame 14 is formed of an H-shaped steel having a web 24, an upper flange 26, and a lower flange 28, and the bracket 16 of the steel column 12 is formed of an H-shaped steel having a web 18, an upper flange 20, and a lower flange 22. The upper splice plate 30 is disposed on the upper side of the upper flange 26 of the beam steel frame 14, and the lower splice plates 32, 34 are disposed so as to contact the lower side of the upper flange 26 of the beam steel frame 14, and the bolts 36, 38 are inserted into the bolt hole 30a of the upper splice plate 30, the bolt hole 26a of the upper flange 26 of the beam steel frame 14, and the bolt holes 32a, 34a of the lower splice plates 32, 34, and the process of temporarily fixing the upper splice plate 30 and the lower splice plates 32, 34 so as to sandwich the upper flange 26 of the beam steel frame 14 is performed before the process of moving the beam steel frame 14 relative to the bracket 16 of the steel column 12 by the laying-in method. The process of inserting the bolts 52 and temporarily fixing the steel beam 14 to the bracket 16 includes inserting the bolts 52 into the first bolt holes 50a of the base member 50 of the joint device 10 placed on the upper splice plate 30 of the steel beam 14, the bolt holes 30a of the upper splice plate 30, the bolt holes 20a of the bracket 16 of the steel column 12, and the bolt holes 32a of the lower splice plate 32, to temporarily fix the steel beam 14 to the bracket 16. According to this configuration, the upper flange 20 of the bracket 16 of the steel column 12 and the upper flange 26 of the steel beam 14 are sandwiched between the upper splice plate 30 and the lower splice plate 32, so that the bracket 16 and the steel beam 14 can be temporarily fixed.

[0048] In the above temporary fixing method, the steel beams 14 are moved between the steel columns 12 by a pushing-in method. Therefore, the steel beams 14 can be moved relatively easily between the brackets 16 of the steel columns 12 while making fine adjustments with a slack rope or the like.

[0049] In addition, since the above-mentioned temporary fixing structure and method can temporarily fix the steel beam 14 by a pushing-in method using a simple joint device 10, it can also be used in an automated construction method for steel frame work.

[0050] In addition, the plate member 50 of the connecting device 10 is a flat member with a simple configuration, and can be easily manufactured by processing a flat plate material. The plate member 50 can be easily placed on the upper splice plate 30, and can be easily aligned with the bolt holes 30a of the upper splice plate 30 and the bolt holes 20a, 26a of the other upper flanges 20, 26, etc., and is very easy to handle. Therefore, the temporary fixing structure and temporary fixing method using the connecting device 10 can be used in the installation and erection of steel beams at various construction sites.

[0051] In the above temporary fixing method, the upper splice plate 30 is provided on the upper side of the beam steel frame 14, and the lower splice plates 32, 34 are provided on the lower side thereof. However, there may be cases where the lower splice plates 32, 34 are not used. In other words, at the end of the beam steel frame 14, only the upper splice plate 30 may be provided on the upper flange 26 of the beam steel frame 14 as a splice plate.

[0052] Furthermore, the temporary fixing structure and temporary fixing method of the first embodiment and the like, and further the above-mentioned connecting device 10, can be used, with some adjustments as necessary, not only when the steel beam 14 is moved between the steel columns 12 by the pushing-in method, but also when the steel beam 14 is moved between the steel columns 12 by the drop-in method.

[0053] Next, a structure and method for temporarily fixing a steel column 12 and a steel beam 14 using the above-mentioned fastening device 10 according to a second embodiment of the present disclosure will be described with reference to Figures 11 and 12. Only the differences from the first embodiment will be described below, and descriptions of common configurations and common procedures will be substantially omitted.

[0054] 11, in order to join and connect with the bracket 16 attached to the steel column 12, as described in the first embodiment, the upper splice plate 30 and the lower splice plates 32, 34 are preliminarily fastened (temporarily fixed) to the upper flange 26 of the end of the beam steel frame 14 using connecting bolts 36, 38 so as to sandwich the upper flange 26, and further, the splice plate (hereinafter, second lower splice plate) 102 and the splice plates (hereinafter, second upper splice plates) 104, 106 are preliminarily fastened (temporarily fixed) to the lower flange 28 of the same end of the beam steel frame 14 using connecting bolts 108, 110 so as to sandwich the lower flange 28. The second lower splice plate 102 has the same dimensions and configuration as the upper splice plate 30, and the second upper splice plates 104, 106 have the same dimensions and configuration as the lower splice plates 32, 34, respectively. The second lower splice plate 102 corresponds to the third splice plate, and the second upper splice plates 104, 106 each correspond to the fourth splice plate.

[0055] The second lower splice plate 102 is positioned to protrude a required length (second required length) in the longitudinal direction of the beam steel frame 14 so as to contact the underside of the bottom flange 28 of the beam steel frame 14. Meanwhile, the second upper splice plates 104, 106, like the lower splice plates 32, 34, are positioned to contact the upper side of the bottom flange 28 of the beam steel frame 14. Then, a connecting bolt 108 is inserted so as to penetrate the bolt hole 102a of the second lower splice plate 102, the bolt hole 28a of the bottom flange 28 of the beam steel frame 14, and the bolt hole 104a of the second upper splice plate 104, and a nut 108N is tightened on the connecting bolt 108 for temporary fastening (temporary fixation). Similarly, a connecting bolt 110 is inserted through the bolt hole 102a of the second lower splice plate 102, the bolt hole 28a of the lower flange 28 of the beam steel frame 14, and the bolt hole 106a of the second upper splice plate 106, and a nut 110N is tightened on the connecting bolt 110 to temporarily fasten (temporarily fix). At this time, the second upper splice plates 104, 106 may be temporarily fastened by spreading them out laterally so as to face the other end (not shown) of the beam steel frame 14, for example, as shown in FIG. 11, so as not to protrude from the tip side of the longitudinal direction 14A of the beam steel frame 14. In other words, the second upper splice plates 104, 106 are preferably temporarily fixed to the beam steel frame 14 so that the free ends 104F, 106F of the second upper splice plates 104, 106 face the end side (not shown) opposite to the temporarily fixed end 14E of the beam steel frame 14 in the longitudinal direction 14A of the beam steel frame 14, based on the temporary fixing parts 108a, 110a fastened by the connecting bolts 108, 110. This makes it possible to more reliably prevent the second upper splice plates 108, 110 from interfering with the bracket 16 of the steel column 12 when the beam steel frame 14 is moved using the payment method. The installation of the second lower splice plate 102 and the second upper splice plates 104, 106 is included in step S1001 in Figure 10 described in the first embodiment, and this step S1001 corresponds to the fourth step in the method of temporarily fixing a steel column and a steel beam of the technology disclosed herein.

[0056] The connecting bolts 36, 38, 108, 110 are inserted into the corresponding bolt holes from the inside to the outside of the bracket 16 of the steel column 12 or the steel beam 14, respectively, and the nuts 36N, 38N, 108N, 110N are positioned on the outside of the bracket 16 of the steel column 12 or the steel beam 14. However, the technology of the present disclosure allows the connecting bolts 36, 38, 108, 110 to be attached in the opposite direction. The same applies to the connecting bolts 36, 38 of the first embodiment.

[0057] In this manner, the beam steel frame 14 to which the upper splice plate 30, the lower splice plates 32, 34, the second lower splice plate 102, and the second upper splice plates 104, 106 are attached is lifted by a required crane (lifting device) and transported between the steel columns 12, 12 at the position to be installed (erected), and the ends of the bracket 16 of the steel column 12 and the beam steel frame 14 are butted together. In this butted state, the upper surface of the upper flange 20 of the bracket 16 and the upper surface of the upper flange 26 of the beam steel frame 14 are in abutment with the lower surface of the upper splice plate 30, and the lower surface of the lower flange 22 of the bracket 16 and the lower surface of the lower flange 28 of the beam steel frame 14 are in abutment with the upper surface of the second lower splice plate 102, and the bracket 16 of the steel column 12 and the beam steel frame 14 are installed in a linear manner. When the steel beam 14 is moved, the steel beam 14 suspended by a required crane with the rope 40 is transferred laterally outward between the steel columns 12, 12, and turned by an intermediary rope (not shown) as necessary. At this time, the upper splice plate 30, the lower splice plates 32, 34, the second lower splice plate 102, and the second upper splice plates 104, 106, especially the second lower splice plate 102, are preferably loosely attached so as to make the interval between the upper splice plate 30 and the second lower splice plate 102 sufficiently wide. Then, as described above (for example, see the arrow in FIG. 5), the steel beam 14 is slid laterally, that is, moved by a pushing method, and the position of the steel beam 14 is finely adjusted while being pulled between the steel columns 12, 12. As a result, the ends of the bracket 16 of the steel column 12 and the steel beam 14 are butted together, and the bracket 16 and the steel beam 14 are aligned in a straight line, aligned in the longitudinal direction 14A of the steel beam 14. A side view of the joint between the bracket 16 of the steel column 12 and the steel beam 14 in this state is shown in Figure 12(a).

[0058] Then, in the state of Fig. 12(a), the connecting bolts 36, 38, 108, 110 are loosened as necessary, and the lower splice plates 32, 34 and the second upper splice plates 104, 106 are moved to a predetermined position toward the web 18 of the bracket 16 of the steel beam 12 so as to close. Fig. 12(b) shows the lower splice plates 32, 34 and the second upper splice plates 104, 106 moved in this manner. The movement of the lower splice plates 32, 34 and the second upper splice plates 104, 106 to the predetermined positions is included in step S1005 of Fig. 10 described in the first embodiment. Then, as already described, the steps from Fig. 8(c) onwards are performed.

[0059] As described above, in the second embodiment, the splice plates 30, 32, 34 are temporarily fastened to the upper flange 26 of the beam steel frame 14, and the splice plates 102, 104, 106 are temporarily fastened to the lower flange 28 (see step S1001 in FIG. 10). Then, the beam steel frame 14 to which they are temporarily fastened by the pushing method is moved between the steel columns 12 (see step S1003 in FIG. 10), the lower splice plates 32, 34 and the second upper splice plates 104, 106 are moved to predetermined positions (see step S1005 in FIG. 10), and steps using the joint fixture 10 (steps S1007 and after in FIG. 10) are performed. Therefore, the splice plates 102, 104, 106 can be attached to the lower flange 28 of the beam steel frame 14 before erection, which can significantly improve the work efficiency.

[0060] Although the embodiments and modifications of the present disclosure have been described above, the present disclosure is not limited thereto. Various substitutions and modifications are possible without departing from the spirit and scope of the present disclosure as defined by the claims of the present application. [Explanation of symbols]

[0061] 10 Joining equipment 12 Steel column 14 Beam Steel 16 Bracket 20, 26 Upper flange 30 Splice Plate (First Splice Plate) 32, 34 splice plate (second splice plate) 50 base member 50a Bolt hole (first bolt hole) 50b Bolt hole (second bolt hole) 52, 54 volts 102 splice plate (third splice plate) 104, 106 splice plate (fourth splice plate)

Claims

1. A method for temporarily fixing a steel column and a steel beam, comprising the steps of: A first step is to move the beam steel, to which a first splice plate is attached in advance to an end of the beam steel by a required length in the longitudinal direction of the beam steel, relative to the bracket of the steel column by a pushing method, thereby aligning the bracket and the beam steel in the longitudinal direction and positioning the first splice plate above the bracket; A second step of positioning a base member of a splice device on the first splice plate of the beam steel; a third step of inserting bolts into the first bolt holes of the base member, the first bolt holes of the first splice plate, and the bolt holes of the bracket of the steel column to temporarily fix the steel beam to the bracket; Including, A method of temporarily fixing steel columns and steel beams.

2. The beam steel frame is formed of an H-shaped steel having a web, an upper flange, and a lower flange, The bracket of the steel column is formed of an H-shaped steel having a web, an upper flange, and a lower flange, The method includes a fourth step, which includes, before the first step, arranging the first splice plate so as to contact an upper side of the upper flange of the beam steel frame, arranging the second splice plate so as to contact a lower side of the upper flange of the beam steel frame, and inserting bolts into the bolt holes of the first splice plate, the bolt holes of the upper flange of the beam steel frame, and the bolt holes of the second splice plate, and temporarily fixing the first splice plate and the second splice plate so as to sandwich the upper flange of the beam steel frame; The third step includes inserting bolts into the first bolt hole of the base member of the joining device placed on the first splice plate of the beam steel, the first bolt hole of the first splice plate, the bolt hole of the bracket of the steel column, and the first bolt hole of the second splice plate to temporarily fix the beam steel to the bracket. The method for temporarily fixing a steel column and a steel beam according to claim 1.

3. the fourth step includes arranging a third splice plate protruding a second required length in the longitudinal direction of the beam steel frame so as to contact the lower side of the bottom flange of the beam steel frame, arranging a fourth splice plate so as to contact the upper side of the bottom flange of the beam steel frame, and inserting bolts into bolt holes of the third splice plate, bolt holes of the bottom flange of the beam steel frame, and bolt holes of the fourth splice plate, and temporarily fixing the third splice plate and the fourth splice plate so as to sandwich the bottom flange of the beam steel frame. The method for temporarily fixing a steel column and a steel beam according to claim 2.

4. In the fourth step, the second splice plate or the fourth splice plate is temporarily fixed to the beam steel frame so that a free end of the second splice plate or the fourth splice plate faces an end side opposite to the end of the beam steel frame to which the second splice plate or the fourth splice plate is temporarily fixed in the longitudinal direction, based on a temporary fixing portion of the second splice plate or the fourth splice plate to the beam steel frame. The method for temporarily fixing a steel column and a steel beam according to claim 2 or 3.

5. A fifth step of inserting bolts into a second bolt hole of the base member of the joint device placed on the first splice plate of the beam steel frame, a second bolt hole of the first splice plate, and a bolt hole of the beam steel frame, A method for temporarily fixing a steel column and a steel beam according to any one of claims 1 to 3.

6. The joining device used in the method for temporarily fixing a steel column and a steel beam according to claim 1, The base member; The first bolt hole formed in the base member; a second bolt hole formed in the base member, the second bolt hole extending in the same direction as the first bolt hole; Equipped with The distance between the first bolt hole and the second bolt hole is related to the distance between the bolt hole of the bracket of the steel column and the bolt hole of the steel beam arranged next to the bracket. Joining equipment.

7. The base member comprises a flat plate-like member. A joining device according to claim 6.

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