JP2024082452A - Beam connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a beam connection structure which can secure support rigidity of a beam while avoiding increase in size.

SOLUTION: A bracket 3 is fixed to a mounting surface 10 of a column 1. A beam 2 is arranged so as to extend in a direction perpendicular to the mounting surface 10. The bracket 3 includes a support part 30, a pair of side wall parts 31, an upward fixing part 32 which is bent upward from the end in the support part 30 and extends along the mounting surface 10, and side fixing parts 33 which are bent inward in a width direction Y from the ends of each of the pair of side wall parts 31 and extend along the mounting surface 10. The upward fixing part 32 is fixed to the mounting surface 10 in a region above the support part 30, in a state of being brought into contact with the mounting surface 10. Each of the pair of side fixing parts 33 is fixed to the mounting surface 10 in a region below the support part 30, in a state of being brought into contact with the mounting surface 10.

SELECTED DRAWING: Figure 6

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a beam connection structure that uses brackets to connect beams to columns.

Various structures have been proposed to connect columns and beams. For example, JP 2009-297147 A (Patent Document 1) discloses a connection structure that connects a beam member arranged to extend horizontally from the side of a column member to the column member. In the following description of the background art, the reference numerals in parentheses refer to those in Patent Document 1.

In the connection structure disclosed in Patent Document 1, a pair of joints (2, 3) are attached to a pillar member (1a) and two beam members (1b) are connected to the pair of joints (2, 3), thereby connecting one pillar member (1a) and two beam members (1b). Specifically, the pair of joints (2, 3) are joined to each other so as to cover the pillar member (1a), thereby forming a cylindrical portion into which the beam member (1b) is inserted. Then, with the beam member (1b) inserted into the cylindrical portion, the beam member (1b) is connected to each joint (2, 3) by bolts (5).

JP 2009-297147 A

Meanwhile, a moment acts on the beam member (1b) with the connection part between the column member (1a) and the beam member (1b) as a fulcrum. However, in the connection structure disclosed in Patent Document 1, a pair of joints (2, 3) forms a cylindrical part, and the beam member (1b) inserted into the cylindrical part is simply connected by a bolt (5), so it is difficult to say that the rigidity against the moment is sufficient. This problem becomes more pronounced as the weight supported by the beam member increases. In addition, if an attempt is made to increase the support rigidity of the beam in the connection structure disclosed in Patent Document 1, the size of the pair of joints (2, 3) will increase, and the connection structure will become larger, which will tend to impose greater restrictions on the arrangement of other members such as flooring materials supported by the columns and beams.

In light of the above situation, it is desirable to realize a beam connection structure that can ensure the supporting rigidity of the beams while avoiding an increase in size.

A beam connection structure in which a beam is connected to a column using a bracket,
The bracket is fixed to a mounting surface which is a side surface of the pillar,
The beam is disposed so as to extend along a direction perpendicular to the mounting surface,
The direction in which the beam extends is defined as the beam extension direction, the direction perpendicular to the up-down direction as viewed in the beam extension direction along the beam extension direction is defined as the width direction, the column side in the beam extension direction is defined as the beam extension direction first side, and the side away from the column in the beam extension direction is defined as the beam extension direction second side,
The bracket includes a support portion arranged to extend in the beam extension direction and the width direction and supporting the beam from below, side wall portions bent downward from both ends of the support portion in the width direction and extending along the beam extension direction and the up-down direction, an upper fixing portion bent upward from an end portion of the support portion on a first side in the beam extension direction and extending along the mounting surface, and a side fixing portion bent inward in the width direction from an end portion of each of the pair of side wall portions on the first side in the beam extension direction and extending along the mounting surface,
the upper fixing portion is fixed to the mounting surface in a region above the support portion while being in contact with the mounting surface,
Each of the pair of side fixing portions is fixed to the mounting surface in a region below the support portion while being in contact with the mounting surface.

According to this configuration, the upper and side fixing parts, which are fixing parts of the bracket for connecting the beam to the column, are fixed to the same mounting surface of the column, and the support part of the bracket supports the beam from below, so that the structure for connecting one beam to the column can be easily consolidated on one mounting surface of the column. Therefore, it is easy to avoid the beam connection structure from becoming large. In addition, the bracket supporting the beam has an upper fixing part and a pair of side fixing parts. The upper fixing part is fixed to the mounting surface in an area above the support part while abutting against the mounting surface of the column, and each of the pair of side fixing parts is fixed to the mounting surface in an area below the support part while abutting against the mounting surface of the column. In other words, the bracket is fixed to the mounting surface of the column in an area above and below the support part. Therefore, it is possible to secure a wide vertical area in which the bracket is fixed to the column. This makes it easy to ensure the support rigidity of the beam against the moment acting on the beam with the connection part with the column as a fulcrum. As described above, according to this configuration, it is possible to ensure the support rigidity of the beam while avoiding the size increase.

Further features and advantages of the technology disclosed herein will become more apparent from the following description of exemplary, non-limiting embodiments, which are described with reference to the drawings.

A plan view showing the first and second floors of the article transport facility. A perspective view showing the connection between the pillar and the beam A perspective view showing the connection between the pillars and the beams from above the floorboards. Perspective view of the bracket Bracket front, back, top, bottom and right side views Partial cross-section Exploded view FIG. 13 is a diagram showing a state in which the reference mark and the reference hole overlap when viewed in the up-down direction.

The beam connection structure according to the present disclosure is a structure in which a beam is connected to a column using a bracket. Below, an embodiment of the beam connection structure will be described, taking as an example a case in which the beam connection structure is used in a support frame that constitutes part of an article transport facility.

[Outline of goods transport equipment]
First, an overview of the article transport facility will be described with reference to Fig. 1. As shown in Fig. 1, the article transport facility 100 includes multiple levels of traveling floors F arranged vertically, a support frame SF that supports the multiple traveling floors F, and transport vehicles V that travel on traveling surfaces Ff formed on each of the multiple traveling floors F. On the traveling floors F of each level, the multiple transport vehicles V travel on the traveling surfaces Ff.

In the example shown in FIG. 1, the item transport equipment 100 has two levels of running floors F. FIG. 1 shows a first level running floor F and a second level running floor F. However, the item transport equipment 100 is not limited to this configuration, and may have three or more levels of running floors F.

The transport vehicle V is configured to transport an item G. The transport vehicle V is configured to travel straight ahead and to change direction by rotating on the spot around a vertical axis. By performing straight ahead travel and rotating operations, the transport vehicle V is able to travel freely on the running surface Ff on both the first floor running floor F and the second floor running floor F.

The item transport equipment 100 includes a pair of lifters L that raise and lower the transport vehicle V across multiple levels (two levels in this example) of running floors F, an item supply section Pg to which items G are supplied, a work area WA in which the items G supplied from the item supply section Pg are handed over to the transport vehicle V, a sorting area SA in which sorting of the items G is performed, and an empty container recovery device B that recovers empty containers C generated by the sorting work in the sorting area SA.

In this embodiment, both the work area WA and the sorting area SA are located at the same level as the first floor travel floor F. And, neither the work area WA nor the sorting area SA is located on the second floor travel floor F.

The work area WA is arranged adjacent to both the travel path of the transport vehicle V on the first floor travel floor F and the item supply unit Pg. In this embodiment, the item supply unit Pg supplies the item G to the work area WA in a state where it is stored in a supply container Cp. In the work area WA, the item G stored in the supply container Cp is taken out and the item G is handed over to the transport vehicle V waiting on the travel path. The item G may be handed over to the transport vehicle V in a state where the item G is stored in a container C other than the supply container Cp, or the item G may be handed over as is without being stored in a container C. In this embodiment, the above work in the work area WA is performed by a worker W. However, the above work may be performed by a robot instead of the worker W, or the above work may be performed by both the worker W and the robot.

The sorting area SA is located adjacent to the travel path at a location away from the work area WA. The transport vehicle V transports the items G received in the work area WA to the sorting area SA. In the sorting area SA, the items G transported by the transport vehicle V are sorted. In this embodiment, the sorting area SA is equipped with multiple sorting conveyors Sc. The transport vehicle V delivers the items G to one of the multiple sorting conveyors Sc. In the sorting area SA, the items G delivered to the sorting conveyors Sc by the transport vehicle V are sorted. The sorting is performed based on predetermined order information. For example, the order information includes various information such as customer information, shipping destination information, and item type information.

When the transport vehicle V transports the items G contained in the container C to the sorting area SA, it hands over the items G together with the container C to the sorting conveyor Sc. In this case, in the sorting area SA, a removal operation is performed to remove the items G from the container C transported by the transport vehicle V. The empty containers C generated by this removal operation are collected by the empty container recovery device B. The empty containers C collected by the empty container recovery device B are transported along the recovery path Rb to the work area WA and used for work in the work area WA. In this embodiment, the sorting operation (including the above-mentioned removal operation) in the sorting area SA is performed by a worker W. However, the sorting operation may be performed by a robot instead of the worker W, or the sorting operation may be performed by both the worker W and the robot.

After the transport vehicle V delivers the item G to the sorting area SA, it gets on the lifter L and heads to the running floor F on another floor (the second floor running floor F in this example). The transport vehicle V then travels on the second floor running floor F and gets on another lifter L, returning to the running floor F on the floor where the above-mentioned work area WA and sorting area SA are located (the first floor running floor F in this example). The returning transport vehicle V picks up the item G in the work area WA and transports the item G to the sorting area SA, in the same manner as above.

[Configuration of the support frame]
Next, the support frame SF will be described. As described above, the support frame SF supports a plurality of running floors F. The support frame SF is configured by combining a plurality of columns 1 and a plurality of beams 2.

As shown in FIG. 2, the pillar 1 extends in the vertical direction. The beam 2 is connected to the pillar 1 and extends in the horizontal direction. In the beam connection structure CS according to the present disclosure, a bracket 3 is used to connect such a beam 2 to the pillar 1. In this specification, "extending in a certain direction" is not limited to extending parallel to that direction, but also includes extending in a direction inclined relative to that direction (for example, a direction inclined by an angle of 20 degrees or less).

The bracket 3 is fixed to the mounting surface 10, which is the side surface of the pillar 1. In this embodiment, the bracket 3 is fixed to the pillar 1 by a plurality of rivets 98. A through hole 10h is formed in the mounting surface 10 of the pillar 1. The rivets 98 are arranged to integrally penetrate the bracket 3 and the through hole 10h of the mounting surface 10, thereby fixing the bracket 3 to the mounting surface 10 of the pillar 1.

In this embodiment, the pillar 1 is formed in a quadrangular pillar shape having four side faces. Therefore, the pillar 1 has four mounting surfaces 10, and the bracket 3 is fixed to at least one of the four mounting surfaces 10 (three mounting surfaces 10 in the illustrated example). Therefore, a maximum of four beams 2 can be connected to one pillar 1. According to this, when the pillar 1 is placed in an area other than the outer edge of the running surface Ff, a maximum of four beams 2 can be connected to the pillar 1, making it easier to appropriately support the running floor F using the beams 2. The number of beams 2 connected to the pillar 1 can be determined arbitrarily.

The beam 2 is arranged to extend in a direction perpendicular to the mounting surface 10. The bracket 3 is configured to connect the end of the beam 2 in the extension direction to the mounting surface 10. In this embodiment, the beam 2 is fixed to the bracket 3 by a plurality of bolts 99.

In the following, the direction in which the beam 2 extends is referred to as the "beam extension direction X", and the direction perpendicular to the up-down direction when viewed along the beam extension direction X is referred to as the "width direction Y". The side of the column 1 in the beam extension direction X is referred to as the "beam extension direction first side X1", and the side away from the column 1 in the beam extension direction X is referred to as the "beam extension direction second side X2". The beam extension direction X, beam extension direction first side X1, beam extension direction second side, and width direction Y are defined independently for each of the multiple beams 2 connected to the column 1.

As shown in FIG. 3, a plurality of floor plates 4 are attached to a support frame SF, which is composed of a plurality of columns 1 and a plurality of beams 2. The upper surfaces of the plurality of floor plates 4 form the running surface Ff of the running floor F.

In this embodiment, a floor plate 4 is placed on the upper surface of the beam 2. The floor plate 4 is fixed to the beam 2 by a fastening member 97 such as a bolt. A through hole 2h is formed on the upper surface of the beam 2 for the fastening member 97 to pass through (see FIG. 2, etc.). In this embodiment, a plurality of floor plates 4 (four floor plates 4 in the illustrated example) are arranged to surround the periphery of the column 1. One floor plate 4 is connected to one column 1 and fixed to a pair of adjacent beams 2 in a state where it is placed on the upper surface of each of the pair of beams 2.

In this embodiment, the running floor F is provided with a pillar through hole 5 in which the pillar 1 is placed. The pillar 1 is arranged to pass through the pillar through hole 5, and thus passes through the running floor F in the vertical direction. In this example, a part of the bracket 3 (the upper fixing portion 32 described later) is also arranged to pass through the pillar through hole 5, and passes through the running floor F in the vertical direction.

In this embodiment, the floorboard 4 is formed in a rectangular shape when viewed in the vertical direction. A notch 40 is provided in at least some of the four corners of the floorboard 4. The notch 40 is formed so as to cut out toward the center of the floorboard 4 when viewed in the vertical direction. A column through hole 5 is formed by a collection of the notches 40 formed in each of the multiple floorboards 4 arranged adjacent to each other around the column 1. In the example shown in FIG. 3, one column through hole 5 is formed by a collection of the notches 40 formed in each of four adjacent floorboards 4.

Next, the detailed structure of the bracket 3 will be described with reference to Figures 4 and 5. Figures 4 and 5 show the bracket 3 alone, with the pillar 1 and beam 2 omitted. Also, in Figure 5, the left side view is omitted because it is symmetrical with the right side view.

As shown in Figures 4 and 5, the bracket 3 includes a support portion 30 that is arranged to extend in the beam extension direction X and the width direction Y and supports the beam 2 from below, side wall portions 31 that are bent downward from both ends of the support portion 30 in the width direction Y and extend along the beam extension direction X and the up-down direction, an upper fixing portion 32 that is bent upward from the end of the support portion 30 on the first side X1 in the beam extension direction and extends along the mounting surface 10 (see also Figure 2), and side fixing portions 33 that are bent inward in the width direction Y from the end of each of the pair of side wall portions 31 on the first side X1 in the beam extension direction and extend along the mounting surface 10 (see also Figure 2).

The support portion 30, the pair of side wall portions 31, the upper fixing portion 32, and the pair of lateral fixing portions 33 are integrally configured. In this specification, "integrally configured" includes multiple elements being configured from the same material, and multiple elements being inseparably connected by welding or the like. In this embodiment, the support portion 30, the pair of side wall portions 31, the upper fixing portion 32, and the pair of lateral fixing portions 33 are configured from a single material (here, a plate-like material with each portion bent). Also, in this embodiment, the bracket 3 is formed to be plane-symmetrical (mirror symmetrical) with respect to a plane perpendicular to the width direction Y.

The support part 30 supports the beam 2 from below and is fixed to the beam 2. In this embodiment, the support part 30 supports the supported part 20 (described later) of the beam 2 from below (see also FIG. 2).

The support portion 30 has a hole through which a fastening member passes. In this embodiment, the support portion 30 has a female threaded hole 30h into which a bolt 99 screws. The bolt 99 that passes through the beam 2 screws into the female threaded hole 30h of the support portion 30, thereby fixing the beam 2 to the bracket 3. In the illustrated example, the support portion 30 has a pair of female threaded holes 30h. The pair of female threaded holes 30h are positioned at positions spaced apart from each other in the width direction Y.

In this embodiment, a reference mark 30m is formed on the upper surface of the support portion 30. The reference mark 30m is used for alignment when placing the beam 2 in the correct position relative to the bracket 3. The reference mark 30m is composed of a letter, a figure, a symbol, a recess, a protrusion, or a combination thereof. In this example, the reference mark 30m is a figure (e.g., a circular figure) engraved on the support portion 30. In the illustrated example, the reference mark 30m is formed between a pair of female threaded holes 30h. In detail, the reference mark 30m is located at the midpoint between the pair of female threaded holes 30h in the width direction Y.

Each of the pair of side walls 31 supports the beam 2 from the inside in the width direction Y and is fixed to the beam 2. In this embodiment, each of the pair of side walls 31 supports a pair of hanging parts 21 (described later) of the beam 2 from the inside in the width direction Y (see also FIG. 2).

A hole through which a fastening member passes is formed in each of the pair of side wall portions 31. In this embodiment, a female threaded hole 31h into which a bolt 99 screws is formed in each of the pair of side wall portions 31. The bolt 99 that passes through the beam 2 is screwed into the female threaded hole 31h formed in each of the pair of side wall portions 31, thereby fixing the beam 2 to the bracket 3. In this example, the pair of female threaded holes 31h are positioned at the same height.

In this way, the bracket 3 is configured to support the beam 2. Meanwhile, the bracket 3 itself is fixed to the column 1.

As described above, in this embodiment, the bracket 3 is fixed to the column 1 by a plurality of rivets 98. In this embodiment, the upper fixing portion 32 and the pair of side fixing portions 33 each have a rivet through hole (32h, 33h) through which the rivet 98 passes. The plurality of rivet through holes (32h, 33h) and the plurality of through holes 10h (see FIG. 2) formed in the mounting surface 10 of the column 1 are arranged in corresponding positions. The rivet 98 passes integrally through the rivet through holes (32h, 33h) and the through hole 10h, thereby fixing the bracket 3 to the mounting surface 10 of the column 1.

In other words, in the beam connection structure CS according to the present disclosure, the bracket 3 is fixed to the mounting surface 10 of the column 1 at the upper fixing portion 32, and is also fixed to the mounting surface 10 of the column 1 at each of the pair of side fixing portions 33. As a result, the bracket 3 is fixed to the mounting surface 10 of the column 1 in the region above and below the support portion 30. This makes it possible to ensure a wide vertical region in which the bracket 3 is fixed to the column 1. This makes it easier to ensure the support rigidity of the beam 2 against the moment acting on the beam 2 with the connection portion with the column 1 as a fulcrum. This "support rigidity of the beam 2" refers to the rigidity of the bracket 3 for supporting the beam 2.

In this embodiment, a pair of rivet through holes 32h are formed in the upper fixing portion 32. The pair of rivet through holes 32h are arranged at positions spaced apart from each other in the width direction Y. This allows a wide area in the width direction Y in which the upper fixing portion 32 is fixed to the mounting surface 10 of the pillar 1. Therefore, the bracket 3 can be fixed to the pillar 1 with high stability. In the illustrated example, the pair of rivet through holes 32h are arranged at the same height.

In this embodiment, one rivet through hole 33h is formed in each of the pair of side fixing parts 33. The rivet through hole 33h formed in one side fixing part 33 and the rivet through hole 33h formed in the other side fixing part 33 (hereinafter, both may be collectively referred to as the "pair of rivet through holes 33h") are arranged at positions spaced apart from each other in the width direction Y.

In this embodiment, each of the pair of rivet through holes 33h is positioned lower than the female threaded holes 31h formed in each of the pair of side wall portions 31. This makes it easier to set the position of the pair of rivet through holes 33h lower in the entire bracket 3, and makes it possible to ensure a wide vertical distance between the pair of rivet through holes 32h formed in the upper fixing portion 32 and the pair of rivet through holes 33h. This makes it easier to ensure the vertical area in which the bracket 3 is fixed to the column 1, and makes it easier to ensure the support rigidity of the beam 2 against the moment acting on the beam 2 as described above.

Next, the detailed configuration of beam 2 will be explained with primary reference to Figure 6.

As shown in FIG. 6, the beam 2 includes a supported portion 20, which is a plate-like portion extending in the beam extension direction X and the width direction Y, and a hanging portion 21, which is a plate-like portion bent downward from each of both ends of the supported portion 20 in the width direction Y and extends along the beam extension direction X and the up-down direction. The beam 2 is constructed using a long member having a space inside. In this embodiment, the beam 2 has a shape in which a part of the cross section perpendicular to the beam extension direction X is open. In other words, the cross section of the beam 2 is formed into a roughly angular U-shape.

In this embodiment, a space 2G in which the bracket 3 is housed is formed between a pair of hanging portions 21 in the width direction Y. In this example, a part of the bracket 3 is housed in the space 2G. In detail, the support portion 30 and a pair of side wall portions 31 of the bracket 3 are housed in the space 2G (see also FIG. 2). The beam 2 is fixed to the bracket 3 with the bracket 3 (a part of the bracket 3) housed in the space 2G.

The supported portion 20 is supported from below by the bracket 3 and is fixed to the bracket 3. In this embodiment, the supported portion 20 is positioned so as to abut against the support portion 30 of the bracket 3 from above, and is supported by the support portion 30.

The supported portion 20 has a hole through which a fastening member passes. In this embodiment, a bolt through hole 20h is formed in the supported portion 20 for passing a bolt 99 that screws into the female threaded hole 30h of the support portion 30. That is, in this embodiment, the support portion 30 of the bracket 3 has a female threaded hole 30h that screws into the bolt 99, and the supported portion 20 of the beam 2 has a bolt through hole 20h through which the bolt 99 passes.

The bolt through holes 20h of the supported portion 20 are arranged at positions corresponding to the female threaded holes 30h of the supporting portion 30. As described above, in this embodiment, the supporting portion 30 is formed with a pair of female threaded holes 30h arranged at positions spaced apart from each other in the width direction Y. Therefore, the supported portion 20 is formed with a pair of bolt through holes 20h arranged at positions corresponding to the pair of female threaded holes 30h.

In this embodiment, a reference hole 20m is formed that penetrates the supported portion 20 in the vertical direction (see also FIG. 3). The reference hole 20m is used for alignment when arranging the beam 2 in the appropriate position relative to the bracket 3. The reference hole 20m is arranged at a position corresponding to the reference mark 30m formed on the support portion 30. When viewed in the vertical direction, the reference hole 20m is formed larger than the reference mark 30m. That is, when the reference hole 20m is aligned with the reference mark 30m, the reference mark 30m is arranged inside the reference hole 20m when viewed in the vertical direction (see FIG. 8). It is preferable that the shape of the reference hole 20m (shape of the inner surface) when viewed in the vertical direction is distinguishable from the reference mark 30m. In addition, it is preferable that the shape of the reference hole 20m is a shape that circumscribes the reference mark 30m when viewed in the vertical direction. In this example, the reference mark 30m is a circular figure, and the shape of the reference hole 20m when viewed in the vertical direction is formed to be different from a circular shape. In the example shown in FIG. 8, the shape of the reference hole 20m when viewed in the vertical direction is formed to be a square shape. In this example, the reference hole 20m is a hole that is surrounded on all sides, but the reference hole 20m may be a hole that is partially open (for example, a hole that is open on the first side X1 in the beam extension direction). In this way, the reference mark 30m and the reference hole 20m are formed with different appearances, which is expected to make it easier to align the reference hole 20m with the reference mark 30m.

As described above, the pair of bolt through holes 20h formed in the supported portion 20 and the pair of female threaded holes 30h formed in the supporting portion 30 are disposed at positions corresponding to each other. In this embodiment, the reference mark 30m is disposed at a midpoint between the pair of female threaded holes 30h in the width direction Y. Therefore, in this embodiment, the reference hole 20m is disposed at a midpoint between the pair of bolt through holes 20h in the width direction Y. This makes it easier to align the pair of female threaded holes 30h and the pair of bolt through holes 20h by aligning the reference mark 30m and the reference hole 20m.

The pair of hanging parts 21 are supported by the bracket 3 from the inside in the width direction Y and are fixed to the bracket 3. In this embodiment, the pair of hanging parts 21 are arranged separately on both outer sides in the width direction Y with respect to a pair of side wall portions 31 of the bracket 3. In other words, the pair of side wall portions 31 are arranged between the pair of hanging parts 21 in the width direction Y. Each of the pair of hanging parts 21 is arranged so as to abut against the outer surface (the outer surface in the width direction Y) of the corresponding one of the pair of side wall portions 31.

A hole through which a fastening member passes is formed in each of the pair of hanging parts 21. In this embodiment, a bolt through hole 21h is formed in the hanging part 21 for passing a bolt 99 that screws into the female threaded hole 31h of the side wall part 31. That is, in this embodiment, a female threaded hole 31h that screws into the bolt 99 is formed in each of the pair of side wall parts 31 in the bracket 3, and a bolt through hole 21h through which the bolt 99 passes is formed in each of the pair of hanging parts 21 in the beam 2.

The bolt through hole 21h of the hanging portion 21 is disposed at a position corresponding to the female threaded hole 31h of the side wall portion 31. As described above, in this embodiment, the pair of side wall portions 31 each have a female threaded hole 31h formed therein. Therefore, the pair of hanging portions 21 each have a bolt through hole 21h formed therein that corresponds to the female threaded hole 31h of the side wall portion 31.

Figure 7 is an exploded perspective view showing the bracket 3 and the beam 2.

As shown in FIG. 7, the bracket 3 is fixed to the mounting surface 10 of the column 1. The upper fixing portion 32 is fixed to the mounting surface 10 in an area above the support portion 30 while in contact with the mounting surface 10. Also, each of the pair of side fixing portions 33 is fixed to the mounting surface 10 in an area below the support portion 30 while in contact with the mounting surface 10. As a result, the bracket 3 is fixed to the mounting surface 10 of the column 1 in an area above and below the support portion 30. Therefore, the vertical area in which the bracket 3 is fixed to the column 1 can be secured widely. The beam 2 is supported by this bracket 3. Therefore, it is easy to secure the support rigidity of the beam 2 against the moment acting on the beam 2 with the connection portion with the column 1 as a fulcrum.

In this embodiment, the beam 2 is positioned in an appropriate position where each of the multiple bolt through holes (20h, 21h) overlaps with the corresponding female threaded hole (30h, 31h) with the reference mark 30m of the bracket 3 and the reference hole 20m of the beam 2 overlapping in the vertical direction. "Each of the multiple bolt through holes overlaps with the corresponding female threaded hole" means that the bolt through hole and the female threaded hole that correspond to each other and are configured to pass the same bolt 99 through overlap when viewed in the penetration direction of the bolt 99.

When fixing the beam 2 to the bracket 3, first, the beam 2 is placed in the appropriate position relative to the bracket 3. This is done by aligning the reference hole 20m of the beam 2 with the reference mark 30m of the bracket 3. Specifically, as shown in FIG. 8, the supported portion 20 of the beam 2 is placed on the supporting portion 30 of the bracket 3 so that the reference hole 20m of the beam 2 overlaps the reference mark 30m of the bracket 3 when viewed in the vertical direction. As a result, the bolt through holes (20h, 21h) of the beam 2 and the female threaded holes (30h, 31h) of the bracket 3 overlap when viewed in the penetration direction through which the bolt 99 penetrates. In this way, the beam 2 is placed in the appropriate position relative to the bracket 3. Thereafter, the bolt 99 is placed so that it penetrates the corresponding bolt through holes (20h, 21h) and female threaded holes (30h, 31h) integrally, thereby completing the fixing of the beam 2 to the bracket 3.

After the beam 2 has been fixed to the bracket 3, the floor plate 4 is placed on the upper surface of the beam 2 as shown in FIG. 3. As described above, the notches 40 formed in each of the floor plates 4 form a column through hole 5 in which the column 1 is placed.

In this embodiment, the upper fixing portion 32 of the bracket 3 is arranged to pass through the column through hole 5. This makes it easy to check from above the floor board 4 whether the upper fixing portion 32 is fixed to the column 1, which is useful during maintenance. In this embodiment, a bolt 99 that passes through the supported portion 20 of the beam 2 and the supporting portion 30 of the bracket 3 is arranged inside the column through hole 5 when viewed in the vertical direction. In this example, the reference hole 20m of the supported portion 20 is also arranged inside the column through hole 5 when viewed in the vertical direction. This makes it easy to check from above the floor board 4 whether the beam 2 is fixed to the bracket 3, which is also useful during maintenance.

According to the beam connection structure CS described above, the upper fixing part 32 and the side fixing part 33, which are the fixing parts of the bracket 3 for connecting the beam 2 to the column 1, are fixed to the same mounting surface 10 of the column 1, and the support part 30 of the bracket 3 supports the beam 2 from below, so that it is easy to consolidate the structure for connecting one beam 2 to the column 1 to one mounting surface 10 of the column 1. Therefore, it is easy to avoid increasing the size of the beam connection structure CS. In addition, the bracket 3 is fixed to the mounting surface 10 of the column 1 in the area above and below the support part 30. Therefore, it is possible to secure a wide area in the vertical direction where the bracket 3 is fixed to the column 1. This makes it easy to ensure the support rigidity of the beam 2 against the moment acting on the beam 2 with the connection part with the column 1 as a fulcrum.

Other embodiments
Next, other embodiments of the beam connecting structure will be described.

(1) In the above embodiment, an example has been described in which the bracket 3 is fixed to the pillar 1 by a plurality of rivets 98. However, without being limited to such an example, the bracket 3 may be fixed to the pillar 1 using a fastening member such as a bolt, or by welding.

(2) In the above embodiment, an example has been described in which the beam 2 is fixed to the bracket 3 by a plurality of bolts 99. However, without being limited to such an example, the beam 2 may be fixed to the bracket 3 using a fastening member such as a rivet.

(3) In the above embodiment, an example has been described in which the beam 2 has a shape in which a part of the cross section perpendicular to the beam extension direction X is open. However, without being limited to such an example, the beam 2 may have a shape in which the entire cross section perpendicular to the beam extension direction X is closed. In other words, the beam 2 may have a circular cross section when viewed in the beam extension direction X.

(4) In the above embodiment, an example was described in which a reference mark 30m is formed on the upper surface of the support portion 30 and a reference hole 20m is formed penetrating the supported portion 20 in the vertical direction in order to facilitate alignment of the beam 2 with respect to the bracket 3. However, the present invention is not limited to this example, and the reference mark 30m and the reference hole 20m are not essential components of the beam connection structure CS.

(5) The configurations disclosed in the above-described embodiments may be combined with configurations disclosed in other embodiments, provided no inconsistencies arise. With respect to other configurations, the embodiments disclosed in this specification are merely examples in all respects. Therefore, various modifications may be made as appropriate within the scope of the spirit of this disclosure.

[Summary of the above embodiment]
The above-described beam connection structure will now be described.

A beam connection structure in which a beam is connected to a column using a bracket,
The bracket is fixed to a mounting surface which is a side surface of the pillar,
The beam is disposed so as to extend along a direction perpendicular to the mounting surface,
The direction in which the beam extends is defined as the beam extension direction, the direction perpendicular to the up-down direction as viewed in the beam extension direction along the beam extension direction is defined as the width direction, the column side in the beam extension direction is defined as the beam extension direction first side, and the side away from the column in the beam extension direction is defined as the beam extension direction second side,
The bracket includes a support portion arranged to extend in the beam extension direction and the width direction and supporting the beam from below, side wall portions bent downward from both ends of the support portion in the width direction and extending along the beam extension direction and the up-down direction, an upper fixing portion bent upward from an end portion of the support portion on a first side in the beam extension direction and extending along the mounting surface, and a side fixing portion bent inward in the width direction from an end portion of each of the pair of side wall portions on the first side in the beam extension direction and extending along the mounting surface,
the upper fixing portion is fixed to the mounting surface in a region above the support portion while being in contact with the mounting surface,
Each of the pair of side fixing portions is fixed to the mounting surface in a region below the support portion while being in contact with the mounting surface.

According to this configuration, the upper and side fixing parts, which are fixing parts of the bracket for connecting the beam to the column, are fixed to the same mounting surface of the column, and the support part of the bracket supports the beam from below, so that the structure for connecting one beam to the column can be easily consolidated on one mounting surface of the column. Therefore, it is easy to avoid the beam connection structure from becoming large. In addition, the bracket supporting the beam has an upper fixing part and a pair of side fixing parts. The upper fixing part is fixed to the mounting surface in an area above the support part while abutting against the mounting surface of the column, and each of the pair of side fixing parts is fixed to the mounting surface in an area below the support part while abutting against the mounting surface of the column. In other words, the bracket is fixed to the mounting surface of the column in an area above and below the support part. Therefore, it is possible to secure a wide vertical area in which the bracket is fixed to the column. This makes it easy to secure the support rigidity of the beam against the moment acting on the beam with the connection part with the column as a fulcrum. As described above, according to this configuration, it is possible to secure the support rigidity of the beam while avoiding the size from becoming large.

The beam includes a supported portion which is a plate-like portion extending in the beam extension direction and the width direction, and a hanging portion which is a plate-like portion bent downward from each of both ends of the supported portion in the width direction and extends along the beam extension direction and the up-down direction,
a space for accommodating the bracket is formed between the pair of hanging portions in the width direction,
the supported portion is disposed so as to abut against the supporting portion from above and is supported by the supporting portion,
It is preferable that the pair of hanging portions be arranged separately on both outer sides in the width direction with respect to the pair of side wall portions.

According to this configuration, the beam is arranged so as to cover the periphery of the bracket when viewed in the direction of beam extension. This makes it possible to support the beam by the entire periphery of the bracket, making it easier to further increase the supporting rigidity of the beam.

The beam is secured to the bracket by a plurality of bolts;
A female screw hole into which the bolt is screwed is formed in the supporting portion, and a bolt through hole through which the bolt passes is formed in the supported portion,
It is preferable that a female threaded hole into which the bolt screws is formed in each of the pair of side wall portions, and that a bolt through hole through which the bolt passes is formed in each of the pair of hanging portions.

With this configuration, the beam can be easily fixed to the bracket by arranging the bolt so that it passes through the female threaded hole pre-formed in the bracket and the bolt through hole pre-formed in the beam. This makes construction easy.

A reference mark is formed on an upper surface of the support portion,
A reference hole is formed through the supported portion in the vertical direction,
It is preferable that the beam is positioned in an appropriate position where each of the plurality of bolt through holes overlaps with the corresponding female threaded hole with the reference mark overlapping when viewed in the vertical direction.

According to this configuration, by positioning the beam relative to the bracket so that the reference mark of the support part and the reference hole of the beam overlap when viewed from the top and bottom, the beam can be positioned in the appropriate position where each of the multiple bolt through holes overlaps with the female threaded hole corresponding to each bolt through hole. In this state, the beam can be easily fixed to the bracket by positioning bolts so that they pass through the corresponding bolt through holes and female threaded holes. This makes construction even easier.

the bracket is secured to the column by a plurality of rivets;
It is preferable that a rivet through hole through which the rivet passes is formed in each of the upper fixing portion and the pair of side fixing portions.

This configuration makes it easier to secure the bracket to the pillar than if welding or other methods were used.

The technology disclosed herein can be used in beam connection structures that use brackets to connect beams to columns.

CS: Beam connection structure 1: Column 10: Mounting surface 10h: Through hole 2: Beam 2G: Space 20: Supported portion 20h: Bolt through hole 20m: Reference hole 21: Hanging portion 21h: Bolt through hole 3: Bracket 30: Support portion 30h: Female threaded hole 30m: Reference mark 31: Side wall portion 31h: Female threaded hole 32: Upper fixing portion 32h: Rivet through hole 33: Side fixing portion 33h: Rivet through hole 98: Rivet 99: Bolt X: Beam extension direction X1: First side of beam extension direction X2: Second side of beam extension direction Y: Width direction

Claims (5)

A beam connection structure in which a beam is connected to a column using a bracket,
The bracket is fixed to a mounting surface which is a side surface of the pillar,
The beam is disposed so as to extend along a direction perpendicular to the mounting surface,
The direction in which the beam extends is defined as the beam extension direction, the direction perpendicular to the up-down direction as viewed in the beam extension direction along the beam extension direction is defined as the width direction, the column side in the beam extension direction is defined as the beam extension direction first side, and the side away from the column in the beam extension direction is defined as the beam extension direction second side,
The bracket includes a support portion arranged to extend in the beam extension direction and the width direction and supporting the beam from below, side wall portions bent downward from both ends of the support portion in the width direction and extending along the beam extension direction and the up-down direction, an upper fixing portion bent upward from an end portion of the support portion on a first side in the beam extension direction and extending along the mounting surface, and a side fixing portion bent inward in the width direction from an end portion of each of the pair of side wall portions on the first side in the beam extension direction and extending along the mounting surface,
the upper fixing portion is fixed to the mounting surface in a region above the support portion while being in contact with the mounting surface,
A beam connection structure in which each of a pair of side fixing portions is fixed to the mounting surface in a region below the support portion while abutting the mounting surface. The beam includes a supported portion which is a plate-like portion extending in the beam extension direction and the width direction, and a hanging portion which is a plate-like portion bent downward from each of both ends of the supported portion in the width direction and extends along the beam extension direction and the up-down direction,
a space for accommodating the bracket is formed between the pair of hanging portions in the width direction,
the supported portion is disposed so as to abut against the supporting portion from above and is supported by the supporting portion,
The beam connection structure according to claim 1 , wherein a pair of the hanging portions are arranged separately on both outer sides in the width direction relative to a pair of the side wall portions. The beam is secured to the bracket by a plurality of bolts;
A female screw hole into which the bolt is screwed is formed in the supporting portion, and a bolt through hole through which the bolt passes is formed in the supported portion,
The beam connection structure described in claim 2, wherein each of the pair of side wall portions has a female threaded hole into which the bolt screws, and each of the pair of hanging portions has a bolt through hole through which the bolt passes. A reference mark is formed on an upper surface of the support portion,
A reference hole is formed through the supported portion in the vertical direction,
The beam connection structure described in claim 3, wherein the beam is positioned in an appropriate position where each of the multiple bolt through holes overlaps with the corresponding female threaded hole with the reference mark and the reference hole overlapping when viewed in the vertical direction. the bracket is secured to the column by a plurality of rivets;
The beam connection structure according to claim 1 , wherein a rivet through hole through which the rivet passes is formed in each of the upper fixing portion and the pair of side fixing portions.

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