JP3762637B2 - Steel pulling and its supporting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a steel drawing and a supporting structure thereof used for a building structure floor in a steel house, for example.
[0002]
[Prior art]
In recent years, steel houses having a load-bearing and earthquake-resistant structure framed with shaped steel have attracted attention as residential structures. And when constructing such a steel house, in particular, it is necessary to increase the proof stress, rigidity, and durability at the joint portion between the shaped steel and other members.
[0003]
In general, (a) when joining a shape steel and other members, it is often joined from the outside of the shape steel with a hardware such as a gusset plate, and at this time, drilling or the like is performed on the shape steel with a drill screw or the like. . Further, in the case of bolt joining or the like, since the bolt hole machining is performed first, the joining position cannot be freely changed after the machining.
(B) Some conventional building structure floors have a structure disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-230291 (hereinafter referred to as a preceding example). In this prior example, as shown in FIG. 7, the floor bundle body c is fastened and installed to the anchor bolt a embedded and fixed on the concrete foundation F with a nut b. As shown in FIG. 8, the floor bundle body c includes a sleeve-shaped shaft portion d, and a pair of upper and lower bolts f and g that are screwed onto the shaft portion d via nuts e and e. The height is adjustable. A U-shaped support member i for large pulling support is fixed to the front end portion of the upper bolt f via a seat h, and side portions j and j formed upright at both left and right edges of the support member i. And a steel pulling body l on which a floor material or joist (not shown) is placed and fixed between the engaging claws k, k formed at the upper ends of both side portions j, By holding both side surfaces from the outside and hooking and locking the locking claw k to the large pulling main body l, the large pulling main body l is joined and supported on the floor bundle main body c.
[0004]
Further, as shown in FIG. 9, such a large-drawn body l is formed of a hollow and long cylindrical square steel m having a rectangular closed cross section, and locking recesses are formed on both left and right side surfaces of the square steel m. n is provided, and the locking claw k of the support member i is locked to the stepped surface n1 of the locking recess n.
[0005]
[Problems to be solved by the invention]
However, in the steel pulling support structure according to the above-described preceding example (A) or (B), when the support member i on the floor bundle main body c and the pulling main body l are joined, the steel pulling main body In many cases, the square steel m forming l is drilled with a drill screw or the like. In addition, in the case of bolt joining or the like, since it is necessary to drill a bolt hole in the square steel m in advance, not only the joining with the floor bundle body c is complicated, but also support after the drilling process. The joining position of the member i and the steel pulling main body l cannot be changed freely. Thereby, workability | operativity at the time of floor construction is reduced.
[0006]
Furthermore, in the case of the preceding example of (b), the square steel m forming the steel pulling main body l has a substantially rectangular cross section, so that the joint surface between the support member i and the lower side flange m1 of the square steel m is wide. 7 by the load (arrow L in FIG. 7) acting through the floor material and joists (not shown) placed and fixed on the upper flange m2 of the square steel m. As shown by the two-dot chain line in FIG. Thereby, the square steel m sinks downward, and the entire floor is deformed.
[0007]
In order to effectively transmit the load acting on the upper flange m2 of the square steel m to the floor bundle body c, it is necessary to increase the rigidity of the support member i. Moreover, when joining such a large drawing main body 1 to the support member i on the floor bundle main body c, it may be driven with a hammer etc., and there exists a possibility of deforming the large drawing main body l. Furthermore, since the support member i that receives the lower flange m1 of the square steel m is also wide, it is necessary to increase the rigidity by subjecting the support member i and the like to extra rib processing. Moreover, since the inward engagement recessed part n is provided in the side webs m3 and m3 on the left and right side surfaces of the square steel m, there is a problem that the square steel m is likely to buckle.
[0008]
The present invention has been made in view of the above-described circumstances, and is made of steel that can increase the yield strength and rigidity of simplification, simplify the joining with the floor bundle, and improve workability during floor construction. It is an object to provide a large drawing and a supporting structure thereof.
[0009]
[Means for Solving the Problems]
In order to solve this problem, the invention according to claim 1 of the present invention is a steel pulling made of a shaped steel formed by bending a steel plate and having a lower central portion opened continuously in the longitudinal direction. in its Obiki it has an open cross-sectional configuration of the elongated inverted trapezoid that between the lower flange is opened in the longitudinal direction of the body, Ri Na and the floor beam for clamping portion provided in the opening portion inside of the bottom flange, the floor beam The holding portion is bent in a substantially U-shaped cross section by the lower flange, a vertical portion that stands up against each other from the inner ends of the lower flanges, and a horizontal upper portion that extends outward from the upper end of the vertical portion. It is characterized by having the form made into.
[0011]
Further, in the steel pulling support structure according to claim 2, the center portion between the lower flanges of the shape steel is formed of a pulling main body having a longitudinally inverted trapezoidal open cross section, and is open in the longitudinal direction. Inside the open part between the lower flanges, the lower flanges, vertical parts that stand up against each other from the inner ends of the lower flanges, and a floor bundle gripping part, and height adjustment installed on the foundation A pair of inner and outer gripping members are fitted to the front end of the flexible floor bundle body, and the floor bundle gripping portion is gripped and fastened by both the inner and outer gripping members so that the large pulling body and the floor bundle body are connected. Ri Na and fixed to each other, the floor beam for clamping unit, said each lower flange, and a vertical portion erecting opposite each other from the inner end of both said lower flange, horizontal extending outwardly from the upper end of the vertical portion The upper part and the upper part are bent in a substantially U-shaped cross section .
[0012]
That is, according to the support structure for steel pulling according to the present invention, the pulling main body is formed of shape steel. And the center part between the lower flanges of a shape steel is continuously open | released in a longitudinal direction, and it has the form which consists of an open cross section of a vertically long inverted trapezoid. Since the bottom flange of the shape steel becomes narrow, it becomes possible to effectively transmit the load acting on the shape steel to the floor bundle body via the side web.
[0013]
Also, a floor bundle gripping part is provided inside the open part of the lower flange of the shape steel, and this floor bundle gripping part is fitted on the tip of the floor bundle body with adjustable height installed on the foundation. By holding and fastening with a pair of holding members, the large pull body is fixed on the floor bundle main body, so that the load acting on the large pull body can be effectively transmitted. Moreover, since it is not necessary to use a conventional drill screw, not only the joining with the floor bundle is simplified, but also the workability at the time of floor construction is improved because it can be performed at any position in the longitudinal direction of the main body. Can be achieved. Furthermore, since it is not necessary to drive with a hammer or the like, the large pulling main body is not deformed. Furthermore, since the dimension of the shape steel to the outside of both lower flanges is narrow, the holding member of the floor bundle body that holds the both lower flanges can be reduced in size, and extra rib processing and the like are performed. There is no need.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS. As shown in FIG.1 and FIG.2, on the foundation F, the floor bundle main body 1 is installed in a standing state at a predetermined interval. A floor surface material 20 is placed on the main pulling body 10 while being supported.
[0015]
As shown in FIG. 3, the floor bundle body 1 includes a sleeve-like shaft portion 2 having a left female screw portion and a right female screw portion at both ends, and a pair of upper and lower screws screwed up and down of the shaft portion 2. It has left-hand or right-hand screw bolts 3 and 4 having different directions, and a pedestal 5 that supports the lower end 4a of the lower bolt 4 in an upright state. By rotating the shaft portion 2 with respect to the upper and lower bolts 3 and 4 Height adjustment is possible. Then, an outer gripping member 7A made of a U-shaped plate supported by the first fastening nut 6A and an inner gripping member 7B made of an inverted U-shaped plate are attached to the tip 3a side of the upper bolt 3. The second fastening nut 6B is fixed to the upper end surface of the inner clamping member 7B by welding or the like.
[0016]
That is, in order to install the floor bundle body 1 on the foundation F, the base 5 of the floor bundle body 1 is fixed to the anchor bolts 8A and 8B embedded and fixed in the foundation F in advance, and then the anchor bolts 8A and 8B are attached. The floor bundle body 1 is fixed on the foundation F by screwing and fastening the nuts 9A and 9B.
[0017]
On the other hand, as shown in FIG. 4, the shape of the large pull main body 10 supported on the floor bundle main body 1 is obtained by bending a strip-shaped steel sheet having a thickness of 0.5 mm to 2.3 mm in the width direction. It is formed of the formed shape steel 11. This section steel 11 has a hollow substantially vertically inverted trapezoidal cross-sectional shape, and has an open section between a pair of lower flanges 12 at the same level, that is, the central portion of the section steel 11 opens in the longitudinal direction. The wide upper flange 13 of the shaped steel 11 on which the joint ends 20a, 20a of the floor materials 20, 20 are placed is bent into a substantially obtuse angle V-shaped cross-sectional shape over the entire width direction. I am letting. Further, vertical ribs 15, 15 are formed along the vertical direction on the left and right side webs 14, 14 that incline in a direction approaching each other downward from the end of the upper flange (upper surface plate) 13 in the shape steel 11. Thus, the proof stress and rigidity of the side web 14 against the load acting on the upper flange 13 in the floor construction state are increased. Each said vertical rib 15 and 15 is provided so that it may be located in the vertical surface of the position where the floor bundle main body 1 is arrange | positioned. Furthermore, a lower flange 12 that is horizontal at the same level from the lower ends of the webs 14 and 14 in the shape steel 11 is integrally provided, and a floor bundle gripping portion 17 is provided in the open portion 16 between the lower flanges 12. The lower flange 12 is integrally bent and formed inside. Therefore, the dimension to the outside of each lower flange 12 provided at the lower end of the inclined left and right side webs 14, 14 can be a narrow width dimension.
[0018]
The floor bundle gripping portion 17 includes left and right horizontal lower flanges 12 with an open portion 16 in the shape steel 11 therebetween, and vertical portions 17b that are erected opposite to each other from the inner ends of the horizontal lower flanges 12, respectively. 17b and horizontal upper surface portions 17c and 17c extending outward from the upper ends of the vertical portions 17b and 17b are integrally bent in a U-shape.
[0019]
And in order to support the above-mentioned large drawing main body 10 on the floor bundle main body 1 installed on the foundation F, as shown in FIG. 5, it is 1st on the front-end | tip part 3a side of the upper volt | bolt 3 of the floor bundle main body 1. As shown in FIG. The outer clamping member 7A supported by the fastening nut 6A and the inner clamping member 7B screwed by the second fastening nut 6B are fitted together. In this case, the inner clamping member 7 </ b> B is positioned in advance by being screwed to the distal end portion 3 a of the upper bolt 3 so as to regulate the height of the large pull main body 10. The outer holding member 7A is formed by bending a single steel plate so as to expand upward and open upward, and comes into contact with the outer surfaces of the left and right side webs 14,14. A pair of outer sandwich steel plates 71 inclined to each other and a bottom plate 72 connecting them, and the bottom plate 72 is provided with bolt insertion through holes. Further, the inner clamping member 7B is formed by bending a single steel plate so as to be reduced and opening downward, and is inclined so as to contact the inner surfaces of the left and right side webs 14,14. The inner sandwiched steel plate 73 and the upper surface plate 74 connecting them are provided, and the upper surface plate 74 is provided with a through hole for bolt insertion, and the fastening nut 6B is disposed concentrically in the through hole for bolt insertion. And fixed by welding. Therefore, the lower end portion of the pulling main body 10 can be crimped and clamped by the outer clamping member 7A and the inner clamping member 7B. Further, since the outer dimension of each lower flange 12 in the large pulling main body 10 is reduced, the bottom plate 72 of the outer clamping member 7A can be a dimension close to the width dimension of the first fastening nut 6A, and the outer clamping member 7A. In addition, the inner holding member 7B can be made relatively small.
[0020]
Next, the floor bundle main body 1 is slid relative to the structural steel 11 forming the large pulling main body 10 in the longitudinal direction, and the lower end portions 14a of the left and right side webs 14 are moved between the outer clamping member 7A and the inner clamping member 7B. Insert between. At this time, the floor bundle gripping portion 17 formed on the upper portion of the lower flange 12 of the shape steel 11 is inserted so as to be wound inside the inner gripping member 7B as shown in FIG. In this state, after positioning the floor bundle body 1 at a desired position with respect to the shape steel 11, the first fastening nut 6A is tightened and finally tightened, and the floor of the shape steel 11 is formed by the outer clamping member 7A and the inner clamping member 7B. The bundle gripping part 17 is clamped and fastened. As a result, the large pulling main body 10 is fixed onto the floor bundle main body 1.
[0021]
In the above-described embodiment, the example in which the floor material 20 is directly placed on the large pulling body 10 supported on the floor bundle main body 1 has been described. However, the joist is fixed on the large pulling main body 10. Needless to say, the floor material 20 may be placed through the joists.
[0022]
【The invention's effect】
As described above, in the steel pulling support structure according to the present invention, the pulling main body is formed of a shape steel, and between the lower flanges of the shape steel is opened in the longitudinal direction, and from the open section of the vertically inverted trapezoidal shape. Therefore, the load acting on the main pulling body can be effectively transmitted to the floor bundle through the side web, and the conventional deformation can be prevented.
[0023]
Also, a floor bundle gripping part is provided inside the open part of the lower flange of the shape steel, and this floor bundle gripping part is fitted on the tip of the floor bundle body with adjustable height installed on the foundation. By holding and fastening with a pair of holding members, the large pulling main body is fixed on the floor bundle main body, so that the load acting on the large pulling main body can be effectively transmitted. Moreover, since it is not necessary to use a conventional drill screw, not only can the joining with the floor bundle be simplified, but it can be performed at any position in the longitudinal direction of the overdrawing main body. It becomes possible to improve workability. Furthermore, since it is not necessary to drive with a hammer or the like, the large pulling main body is not deformed.
[0024]
Furthermore, since the width dimension including each lower flange of the shape steel is narrow, the holding member of the floor bundle body that holds each lower flange side can be reduced in size, and it is necessary to perform extra rib processing and the like. Absent.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing a part of an embodiment of a steel pulling support structure according to the present invention, partly cut away.
2 is a cross-sectional view taken along the line I-I in FIG.
FIG. 3 is an exploded perspective view showing the floor bundle body in an enlarged manner.
FIG. 4 is an enlarged perspective view showing a form of steel pulling.
FIG. 5 is an explanatory view showing the assembled state of the inner and outer holding members to the floor bundle body when the large pulling body is supported.
FIG. 6 is an explanatory view showing the support state of the large pull main body and the floor bundle main body.
FIG. 7 is a cross-sectional view showing a conventional state of supporting steel pulling.
FIG. 8 is an enlarged cross-sectional view showing a conventional floor bundle body.
FIG. 9 is an enlarged cross-sectional view showing a conventional steel drawing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor bundle body 2 Shaft part 3 Upper bolt 3a Tip part 4 Lower bolt 4a Lower end part 5 Base 6A First fastening nut 6B Second fastening nut 7A Outer clamping member 71 Outer clamping steel plate 72 Bottom plate 7B Inner clamping member 73 Inner clamping Steel plate 74 Upper surface plate 8A Anchor bolt 8B Anchor bolt 9A Nut 9B Nut 10 Large pulling body 11 Shaped steel 11a Lower end 12 Lower flange 13 Upper flange 14 Side web 15 Vertical rib 16 Opening portion 17 Floor bundle gripping portion 17b Vertical portion 17c Horizontal Upper surface part 20 Floor material 20a Joint end F Foundation

Claims (2)

In steel pulling made of steel that is formed by bending a steel plate and the lower center part is continuously opened in the longitudinal direction, the longitudinally long gaps between the lower flanges in the pulling body are opened in the longitudinal direction. has an inverted trapezoidal open cross-sectional configuration, Ri Na and the floor beam for clamping portion provided in the opening portion inside of the bottom flange,
The floor bundle gripping portion has a substantially U-shaped cross section with each of the lower flanges, a vertical portion standing opposite to each other from the inner ends of the lower flanges, and a horizontal upper portion extending outward from the upper end of the vertical portions. Steel pulling characterized by having a shape bent into a shape . A central portion between the lower flanges of the section steel is open in the longitudinal direction, and includes a large pulling body having an open section of a vertically inverted trapezoidal shape. A vertical part that stands up against each other from the inner end of the lower flange and a floor bundle gripping part are provided, and a pair of inner and outer gripping members are fitted to the tip of the floor bundle body that can be adjusted in height on the foundation. wear, and by fastening by clamping the floor bundle clamping portion at the inner outside both clamping members, Ri Na secure the said Obiki body and Yukataba body together,
The floor bundle gripping portion has a substantially U-shaped cross section with each of the lower flanges, a vertical portion standing opposite to each other from the inner ends of the lower flanges, and a horizontal upper portion extending outward from the upper end of the vertical portions. A support structure for steel pulling, characterized by having a bent shape .

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