JP4059638B2 - Connection structure of box-shaped steel building materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a joint structure of various building materials using box-shaped steel large draws, joists, and other box-shaped steels.
[0002]
[Prior art]
In various types of houses such as wooden houses and steel houses, instead of the lumber or square joists made of timber (square bars), the large joists or joists made of thin steel box-shaped steel with a thickness of 2.3 mm or less are used. Increased. This box-shaped steel has a closed cross section and is rich in rigidity despite being made of a thin steel plate, and it is lightweight and can be mass-produced, so it is inexpensive, and there is no risk of being eroded by white ants like wood-made pulls. There are advantages such as high durability.
[0003]
Both ends of the box-shaped steel large draw and joist are fixed to the large take-off and joist supports provided on the base using mounting hardware, but these box-shaped steel and mounting hardware are made of thin steel plates. When connecting both members by drill screw drilling, the joint surface of the two members is deformed by the driving force of the drill screw, and both members are bent or gaps are not formed on the joint surface, so that There has been a problem that the fastening operation is insufficient and it is difficult to perform a reliable connection.
[0004]
Referring to FIG. 8, the first conventional example will be described as an example of large drawing. The attachment of L-shaped cross section is provided on both sides of the end portion of the large drawing 1 made of box-shaped steel (hereinafter sometimes referred to as “shaped steel”). The side plate portion 3a of the metal piece 3 is applied, and a drill screw 19 is driven through the side plate portion 3a and both side surfaces 9 of the large pull 1, and an open screw hole 7 is inserted into the L-folded plate portion 3b. Then, by fixing the L-shaped attachment metal 3 to the large receiver, the end portion of the structural steel large drawer 1 is fixed to the large receiver.
[0005]
In the case of the L-shaped fitting 3, the drill screw 19 is driven from the outside of the both side surfaces 9 of the shape steel pulling 1. Since the shape steel pulling 1 is made of a thin steel plate, FIG. ), When the drill screw 19 is driven, both side surfaces 9 of the thin steel plate are subjected to the driving stress of the drill screw 19 to bend in an unstable manner locally on the inner and outer sides, and a gap 13a is formed at the joint portion. As the drill screw 19 to be installed is inclined, there is a problem that the fastening by the drill screw 19 is incomplete and uncertain, and the two members cannot be reliably connected.
[0006]
Next, referring to FIG. 9, the second conventional example will be described as an example of large pulling. An attachment hardware 2 is provided at the end of the box-shaped steel large pulling 1 so as to be freely inserted. By fixing, the end portion of the shape steel large pull 1 is fixed to the large pull receiver 3. The mounting hardware 2 is formed by bending a thin steel plate cut into a predetermined shape, and is composed of both side plates 4 and a front chevron connecting plate 5, and is an engagement projection having a substantially planar shape that is open in the vertical direction. It has a portion 2a, and has a mounting blade 6 that is bent at a right angle with the base ends of both side plates 4 facing outward.
[0007]
The mounting hardware 2 is fixed to the side surface of the large receiver 3 by placing a drill screw in the large receiver 3 provided on the base through the screw hole 7 provided in the blade plate 6. Furthermore, the engagement protrusion 2a of the mounting hardware 2 is inserted into the shape steel pull 1 from its end, but only by that, there is a backlash or misalignment between the shape steel pull 1 and the mounting hardware 2. Or uncertainties in the bond.
[0008]
In particular, the shape steel large draw 1 is formed by forming a strip-shaped thin steel plate into a box cross section by roll forming, but the crimped portion 8 always protrudes at one of the four inner corners of the shape steel. Exists as a part. For this reason, as shown in FIG. 9 (B), the lower end edge 11 of the both side plates 4 of the mounting hardware 2 is inserted by being lifted from the bottom surface 10 of the shape steel puller 1 by the height (h) of the caulking portion 8. Inevitably, this height (h) becomes a gap between the two members, which causes a backlash between the shape steel pull 1 and the mounting hardware 2. Due to this rattling, there is a problem in that when the vibration on the floor that occurs when a person lives is transmitted to the shape steel pull 1 through the joists, a noise is generated by the vibration.
[0009]
As a countermeasure for this, usually, the drill screws 19 are driven through the both side plates 4 of the mounting hardware 2 from the outside of the both side surfaces 9 of the structural steel pulling 1. 9 is made of a thin steel plate. Therefore, as shown in FIG. 9B, when the drill screw 19 is driven, both thin steel plates in the overlapped portion receive the driving stress of the drill screw 19 and locally on the inside and outside. Problems such as unstable bending, gap 13a in the overlapped portion, tilting of the drill screw 19 to be placed, and incomplete and uncertain fastening of the drill screw 19, and failing to reliably connect the two members. There is.
[0010]
For this reason, even if it joins with the drill screw 19 in a conventional structure, when the backlash remains between the shape steel pulling 1 and the attachment hardware 2, and the vibration on the floor is transmitted to the joint part of both members, the said shape steel There remains a problem that a noise occurs between the large draw 1 and the mounting hardware 12.
[0011]
Furthermore, in the conventional mounting hardware 2, the protrusion dimension (L) of the engagement protrusion 2a is relatively short as shown in FIG. 9, and the joining range of the drill screw (fastener) 19 is narrow. It was difficult to adjust the length direction of the structural steel pulling 1 by adjusting the amount of overlap in the joining range. This problem also applies to the case of the mounting hardware 3 in FIG.
[0012]
Furthermore, as shown in FIG. 9 (B), the lower end edge 11 of the both side plates 4 of the mounting hardware 2 floats from the bottom surface 10 of the shape steel pulling 1 by the height (h) of the crimping portion 8. Therefore, since the drill screw 19 bears the stress acting on the fitting from the shape steel, the joint portion of the drill screw 19 is required to have a high proof stress. Further, the joining of the shape steel and the hardware could not be temporarily stopped without using a fastener or the like. The problem of bearing the stress acting on the mounting hardware from the shape steel with the drill screw 19 applies to the mounting hardware 3 of FIG.
[0013]
[Problems to be solved by the invention]
As described above, conventionally, when the mounting hardware 2 or the mounting hardware 3 and the structural steel large draw 1 are coupled by the drill screw 19, the joint portion is bent inwardly or outwardly, or a gap 13a is generated in the joint portion. As a result, the fastening of both members by the drill screw 19 is incomplete, and there is a problem that a noise due to vibration or the like occurs in the joint portion.
[0014]
An object of this invention is to provide the junction structure of the box-shaped steel building materials which solved the said problem.
[0015]
[Means for solving problems]
In order to achieve the above object, the present invention is configured as follows.
[0016]
1st invention is the joining structure which fixes the edge part of box-shaped steel building materials to the frame side which opposes via attachment hardware, Comprising: The joining board part with box-shaped steel in the said attachment hardware is divided-processed. The one split joint plate part is located on the front side of the box shape steel, the other split joint plate part is located on the back side of the box shape steel, and the mounting hardware and the box shape steel are installed, A fastener such as a drill screw is driven from one split joint plate side of the mounting hardware located on the surface side of the box-shaped steel, and the mounting hardware is formed by bending a flat thin steel plate to form both side plates and tips. It is composed of a chevron-shaped connecting plate, and the one split joint plate portion and the other split joint plate portion are divided by making U-shaped cuts in the both side plates, and further the split joint By bending outwardly the base end connecting end of the box section, a holding interval capable of sandwiching both side surfaces of the box-shaped steel is formed between one split joint plate portion and the other split joint plate portion. It is characterized by.
[0017]
According to a second invention, in the first invention, a caulking portion (8) is formed at a corner of the inner surface of the bottom plate (10) of the box-shaped steel building material, and the mounting hardware is symmetrical from the center portion at the lower end edge. The first step portion (20) is provided at a position closer to the tip by a predetermined dimension than the proximal fold line (25a) of the tip chevron connecting plate (25). It is characterized by.
[0018]
According to a third aspect of the present invention, in the first or second aspect of the invention, the mounting hardware has a downward inclined edge (33) at an upper portion of the surface from the both-side proximal bending line (25a) to the top edge (32). It is characterized by.
[0020]
[Action]
According to the present invention, when a fastener such as a drill screw is driven to join the box-shaped steel building material and the mounting hardware, the inner and outer surfaces of the shape steel are sandwiched between one and the other divided joint plate portions of the mounting hardware. Therefore, when a drill screw or the like is placed from the outer split joint plate side, the steel plate surface portion does not escape to the inside or outside even if the steel plate is subjected to the thrust of the drill screw. Therefore, the drill screwing operation can be performed while maintaining close contact between both the joining plates without bending or creating a gap between the mounting hardware. Thereby, there is no backlash after completion of the joint part of both members by fastening with a drill screw, and the noise due to vibration does not occur.
[0021]
The length of the structural steel that is the building material can be adjusted by providing a long joint between the mounting hardware and the structural steel and adjusting the insertion length of the structural steel into the joint.
[0022]
Since the split joint plate part of the mounting hardware is in contact with the upper and lower surfaces of the inner surface of the shape steel, the stress acting on the mounting hardware from the shape steel can be borne by the contact surface, and it is not necessary to bear only with the fastener. There is no such a local burden, and there is no possibility of rupture of the fastener and the resulting structural steel and attachment hardware. Furthermore, when the divided joint plate portion of the mounting hardware is in contact with the upper and lower surfaces of the inner surface of the shaped steel, it can be temporarily fixed without using a fastener or the like when joining the shaped steel and the mounting hardware.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0024]
FIG. 1 is a schematic side view of a floor support structure in which a large pull, which is an example of a box-shaped steel building material (hereinafter referred to as a shape steel) according to the present invention, is used, and FIG. 2 is an enlarged view when a mounting hardware and a shape steel are combined. A perspective view, FIG. 3 is a perspective view showing a coupling state of the mounting hardware 10 and the shape steel 10 together with the height adjusting bundle 10, and FIGS. 4 and 5 are a cross-sectional plan view and a side view of the mounting hardware, FIG. Is a cross-sectional view of a section steel, and FIGS. 7A, 7B, and 7C are a developed view, a plan view, and a front view of a mounting hardware.
[0025]
FIG. 1 shows a floor portion support structure in which a floor 14 is supported by a shape steel pull 1 and a joist 13. Both end portions of the shape steel large pull 1 are fixed to a base 16 via mounting hardware 12. A pillar 17 is erected on the base 16. Further, the intermediate portion of the structural steel draw 1 is supported by one or a plurality of height adjusting bundles 18.
[0026]
Details of the mounting hardware 12 will be described below with reference to FIG. The mounting hardware 12 is composed of both side plates 24 and a tip angle connecting plate 25 by bending one flat thin steel plate cut into a predetermined shape (shown in FIG. 7), and the vertical direction is open. The front end has a substantially planar shape, has an engagement protrusion 12a having a protrusion dimension (L ₁ ), and has an attachment vane plate 26 that is bent at a right angle with the base ends of both side plates 24 outward. .
[0027]
By inserting U-shaped cuts 23 into both side plates (joint plate portions with both side surfaces 9 of the structural steel pulling 1) 24 of the mounting hardware 12, one split joint plate portion 24a and the other split joint plate. The part 24b is divided and processed. Both ends of the U-shaped cut 23 are formed toward the attachment blade plate 26, and by bending the proximal end connecting edge portions 22 of both split joint plate portions 24a and 24b located on the attachment blade plate 26 outward, A clamping gap 21 that can sandwich both side surfaces 9 of the structural steel large pull 1 is opened between the one divided joining plate portion 24a and the other divided joining plate portion 24b, so that the vertical direction and the distal end direction of the engagement protruding portion 12a are open. It is formed in the state. A plurality of screw holes 7 are formed in one split joint plate portion 24 a located outside the both side surfaces 9 of the shape steel large pull 1.
[0028]
Therefore, as shown in FIGS. 1 and 2, when the end portion of the shape steel large pull 1 is inserted into the engagement protrusion 12 a of the mounting hardware 12, the inner and outer surfaces of both side surfaces 9 of the shape steel large pull 1 are Since it is sandwiched between one split joint plate portion 24a and the other split joint plate portion 24b, both members can be temporarily supported in this state, and the drill screw 19 can be inserted from the outside of the split joint plate portion 24a through the screw hole 7. When placing, both side surfaces 9 of the structural steel pulling 1 are not bent inwardly or outwardly, no gap is formed in the joint surface, and the adhesion is maintained and the drill screw 19 ensures that it is not loosened. Can be concluded.
[0029]
Further, the projecting dimension (L ₁ ) of the engagement protrusion 12a of the mounting hardware 12 is set to a sufficiently long dimension, and the end of the shape steel large pull 1 is deeply extended to the base end of the engagement protrusion 12a. Insert the end of the shape steel pull 1 to the mounting hardware 12 at any position, such as inserting and fixing with the drill screw 19 or inserting it to the appropriate position before the base end and fixing with the drill screw 19. It is provided so that it can be fixed securely. Therefore, when an error occurs in the interval error of the large pulling 3 of the building or the length of the shape steel large pull 1, the construction site is changed by changing the insertion length of the shape steel large pull 1 to the engagement protrusion 12a. Thus, the error can be easily adjusted, and it is not necessary to perform processing or the like on the shape steel pulling 1 or the mounting hardware 12, thereby improving the workability.
[0030]
Further, as shown in a developed view in FIG. 7, the first step portion 20 and the second step portion 31 are formed on the lower end edge of the mounting hardware 12 symmetrically from the center portion, and the left and right first step portions. Between the first step portion 27 and the second step portion 31, the second step protrusion portion 28 is formed between the left and right first step portions 20 and 31. The first step portion 20 is provided at a position closer to the distal end by a predetermined dimension (W) than the proximal bending line 25 a of the distal chevron connecting plate 25. Therefore, as shown in FIG. 7 (B), when the engagement protrusion 12a of the mounting hardware 12 formed by bending a flat thin steel plate is inserted into the shape steel pull 1, the first step protrusion 27 is made of shape steel. The crimping portion 8 formed at the corner of the inner surface of the bottom plate 10 can intersect with the gap 42 of the predetermined dimension (W) on the side of the bottom plate 10 in contact with the inner surface of the bottom plate 10.
[0031]
Thus, the tip of the first step protrusion 27 and the upper edges of the side plates 24 (upper edges of the divided joining plate portions 24b) are in pressure contact with the bottom plate 10 of the shape steel large pull 1 and the inner surface of the upper plate 30. Thus, the mounting hardware 12 and the shape steel large pull 1 can be inserted between the up and down directions without rattling. Further, the distance dimension (W ₁ ) between the left and right divided joint plate portions 24b of the mounting hardware 12 is formed to be in close contact with both inner side surfaces of the section steel pulling 1, and thereby the mounting hardware 12 and It can be inserted between the left and right direction with the shape steel large pull 1 without rattling. In addition, although the space | gap 31 of the predetermined dimension (W) is provided left-right symmetrically, this is also in the case where the caulking part 8 of the structural steel large drawing 1 is in any position on the left and right. This is because the same mounting hardware 12 can be applied.
[0032]
Further, as shown in FIG. 7, a surface from the both-side proximal fold line 25 a to the top edge 32 of the upper edge of the tip chevron connecting plate 25 of the mounting hardware 12 is provided on the downward inclined edge 33. In this way, by providing the descending inclined edge 33 on the top of the tip chevron connecting plate 25, the shape steel large pull 1 is inclined so that the inclination is aligned with the downward inclined edge 33, and the shape steel large pull 1 is attached. It can be fitted to the hardware 12. Further, at the lower end edge of the both side plates 24 of the mounting hardware 12, a step portion is formed on the front and rear sides of the second step portion 31, so that when a bending force in the front-rear direction acts on the mounting hardware 12, The mounting hardware 12 can be displaced following the front end of the second step portion 31 so as to incline back and forth, and can relieve stress.
[0033]
One and the other divided joining plate portions 24a and 24b in the mounting hardware 12 are not limited to the illustrated two-divided structure. For example, one divided joining plate portion 24a is further divided into a plurality of portions, and one of them is divided into a plurality of inner divided portions. You may comprise as a joining board part and the other as an outer side multiple division | segmentation joining board part (illustration omitted). Furthermore, in the illustrated example, the example in which the one and the other divided joint plate portions 24a and 24b are integrally formed by inserting the U-shaped cuts 23 in the both side plates of the mounting hardware 12 is shown, but the present invention is not limited thereto. For example, an outer joining plate portion corresponding to one divided joining plate portion 24a may be welded to both side plates 24 (not shown).
[0034]
Next, the height adjusting bundle 18 will be described with reference to FIG. The height adjusting bundle 18 supports the middle of the long section-shaped steel pull 1 at an appropriate interval. The upper end of a cylindrical support rod 34 having a predetermined length is U-shaped via a screw adjusting portion 35. A support frame 36 is provided, and a base plate 37 is provided at the lower end of the cylindrical support rod 34 via a screw adjusting portion 35. In the screw adjusting portion 35 at the upper end, a screw rod 39 to which a locking nut 38 is screwed is welded to the lower surface of the bottom portion 36 a of the U-shaped support frame 36, and the screw rod 39 is connected to the cylindrical support rod 34. Screwed into the upper threaded portion 40. The screw rod 39 is fitted with a washer 41 having a spring property.
[0035]
Accordingly, the U-shaped support frame 36 of the height adjusting bundle 18 can support the structural steel pull 1 and the screw rod 39 can be turned to adjust the height of the U-shaped support frame 36, and Then, the height of the U-shaped support frame 36 can be positioned by fastening the locking nut 38 via the washer 41.
[0036]
The screw adjusting portion 35 at the lower end is also provided in substantially the same manner as the screw adjusting portion 35 at the upper end. That is, a screw rod 39 to which a locking nut 38 is screwed is welded to the upper surface of the base plate 37, and the screw rod 39 is screwed to the screw portion 40 at the upper end of the cylindrical support rod 34. The screw rod 39 is fitted with a washer 41 having a spring property.
[0037]
Therefore, the height of the cylindrical support rod 34 can be adjusted by turning the screw rod 39 and fastening the locking nut 38 via the washer 41 at that position. In this way, the upper and lower screw adjusting portions 35 are adjusted in two stages, the height of the U-shaped support frame 36 of the height adjusting bundle 18 can be adjusted, and the locking nut 38 is fastened by the washer 41 having a strong spring property. The action can be ensured.
[0038]
In addition, the box-shaped steel building material which concerns on this invention may be applied to the case where this building material is joined to another member using an attachment metal fitting, not only large drawing but other joists and other building materials. Furthermore, the fastening member is not limited to a drill screw, and various fasteners may be used.
[0039]
【The invention's effect】
According to the present invention, when a fastener such as a drill screw is driven to join a box-shaped steel building material and an attachment hardware, the inner and outer surfaces of the shape steel are sandwiched between one and the other divided joint plate portions of the attachment hardware. Therefore, when the fastener is driven from the side of the outer divided joint plate part, even if the steel plate shape steel is pushed around the fastener by the thrust of the drill screw, the shape steel plate surface part will not escape, therefore In addition, it is possible to perform the fastener placing work while maintaining close contact between both the joining plates without locally bending or creating a gap between the joining portions of the shape steel and the mounting hardware. Thereby, there is no backlash after completion of the joint part of both members by fastener placement, and the noise by vibration does not arise.
[0040]
In addition, since the split joining members of the attachment hardware are in contact with the upper side surface and the lower side surface of the inner surface of the shape steel, it is possible to temporarily fix the shape steel and the attachment hardware without using a fastener or the like. Furthermore, the length of the shape steel which is a building material can be adjusted by adjusting the amount of overlap of the shape steel with respect to the said junction part by providing the junction part with the shape steel of an attachment metal | frame long.
[0041]
Furthermore, when one split joint member of the mounting hardware comes in contact with the upper and lower surfaces of the inner surface of the shaped steel, the stress acting on the mounting hardware from the shaped steel can be borne by the contact surface, and only the fastener is borne. Since there is no need, there is no local load as in the prior art, and there is no breakage of the fastener, no section steel and attachment hardware due to it.
[Brief description of the drawings]
FIG. 1 is a schematic side view of a floor support structure in which large pulling is performed as an example of a box-shaped steel building material according to the present invention.
FIG. 2 is an enlarged perspective view of the mounting hardware according to the embodiment of the present invention and the shape steel pulling before being coupled.
FIG. 3 is a perspective view showing an attachment hardware, shape steel pulling, and a height adjusting bundle according to an embodiment of the present invention.
FIG. 4 is a cross-sectional plan view of the mounting hardware.
FIG. 5 is a side view of the mounting hardware.
FIG. 6 is a cross-sectional view of a section steel.
FIGS. 7A, 7B, 7C and 7D are a development view, a front view, a side view, and a plan view of a mounting hardware.
FIGS. 8A and 8B are an enlarged perspective view and a cross-sectional view after the attachment of the mounting hardware and the box-shaped steel according to the first conventional example, respectively.
FIGS. 9A and 9B are an enlarged perspective view and a cross-sectional view after the attachment of the mounting hardware and the box-shaped steel according to the second conventional example, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Large drawing 2 Mounting metal 3 Mounting metal 4 Both side plates 5 Tip angle connecting plate 6 Mounting vane plate 7 Screw hole 8 Caulking part 9 Both sides 10 Bottom plate 12 Mounting bracket 13 joist 14 Floor 15 Foundation 16 Base 17 Pillar 18 Height adjustment bundle Material 19 Drill screw 20 First step portion 21 Second step portion 22 Base end connection edge portion 23 U-shaped notch 24 Both side plates 24a One split joint plate portion 24b The other split joint plate portion 25 Tip chevron connecting plate 26 Mounting blade Plate 27 First projecting portion 28 Second step projecting portion 30 Upper plate 31 Second step portion 32 Top edge 33 Downward inclined edge 34 Cylindrical support portion 35 Screw adjusting portion 36 U-shaped upper support portion 37 Base plate 38 Loosening prevention nut 39 Screw杆 40 Screw part 41 Washer 42 Cavity part

Claims (3)

It is a joining structure that fixes the end of a box-shaped steel building material to the opposite frame side via an attachment hardware, and the joining plate portion with the box-shape steel in the attachment hardware is divided and processed on one side The attachment metal part and the box shape steel are installed with the joining plate portion positioned on the surface side of the box shape steel and the other divided joining plate portion located on the back side of the box shape steel. A fastener such as a drill screw is driven in from one split joining plate part side in the mounting hardware located at
The mounting hardware is composed of both side plates and a tip angle connecting plate by bending a flat thin steel plate,
The one split joining plate portion and the other split joining plate portion are divided and processed by making a U-shaped cut in the both side plates,
Further, by bending the proximal end connecting edge portion in the split joint plate portion outward, the holding interval capable of sandwiching both side surfaces of the box-shaped steel has one split joint plate portion and the other split joint plate portion. A box-shaped steel building material joint structure characterized by being formed between the two. A crimped portion (8) is formed at a corner of the inner surface of the bottom plate (10) of the box-shaped steel building material,
The mounting hardware is provided with a first step (20) symmetrically from the center at the lower edge,
Said 1st step part (20) is provided in the position from the front-end | tip only a predetermined dimension rather than the base end bending line (25a) of a front-end | tip mountain-shaped connection board (25).
The box-shaped steel building material joint structure according to claim 1. In the mounting hardware, the upper part of the surface from the both-side proximal fold line (25a) to the top edge (32) is a downward inclined edge (33).
The joint structure of box-shaped steel building materials according to claim 1 or 2.

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