JP4471462B2 - Steel pulling connection structure - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a steel pulling connecting structure used for construction of a lower part of a building such as a house.
[0002]
[Prior art]
In buildings such as houses, floor structures are adopted in which floor panels are placed on concrete foundations. For example, as shown in FIG. 1, a concrete foundation 1 is erected from a ground GL on which concrete or the like is placed, and a floor panel 2 is passed between adjacent concrete foundations 1 and 1. The floor panel 2 is fixed to a pulling 4 supported by a bundle 3 with a fixing bracket such as a nail or a screw.
As the large pull 4, a steel large pull has begun to be used in place of the conventionally used wood. Steel pulling eliminates the disadvantages of wooden pulling that tend to cause deformation such as warping and twisting due to drying shrinkage, and has excellent dimensional stability.
[0003]
In order to facilitate the attachment of the steel pull to the bundle, JP-A-9-217452 has an engagement recess on the side surface of the steel pull and includes an engagement piece that is caught by the engagement recess. Bundles are introduced.
[0004]
As shown in FIG. 2 (a), the metal fitting 3d is fixed to the support bolt 3b standing from the installation plate 3a via the turnbuckle 3c. The receiving metal 3d is provided with standing pieces 3f on both sides with an accommodation space 3e into which the steel puller 6 is inserted, and a locking piece 3g protruding into the accommodation space 3e side by cutting a part of the standing piece 3f. It is said. An engagement protrusion 6a that engages with the locking piece 3g protrudes from both sides of the lower portion of the steel puller 6 connected to the bundle 3.
When the steel drawer 6 is connected to the bundle 3, when the steel drawer 6 is pushed into the housing space 3 e of the bundle 3 from above, the upright pieces 3 f are elastically deformed and open on both sides, and the engagement protrusions 6 a are formed. The standing piece 3f is elastically restored at the time of overcoming the locking piece 3g. As a result, as shown in FIG. 2 (b), the steel pulling 6 is connected to the bundle 3 by the engagement of the locking piece 3 g and the engaging protrusion 6 a.
[0005]
[Problems to be solved by the invention]
In the engagement according to the method of FIG. 2, since the elastic deformation of the locking piece 3g protruding from the upright piece 3f toward the accommodation space 3e is only used for the engaging force, the joint structure has a weak connection strength. Moreover, since the bottom 3h of the accommodation space 3e is deformed upward when the upright piece 3f is opened outward, the elastic restoring force effective for the connection strength is further weakened. Furthermore, the restraining force with respect to the steel large pull 6 being displaced in the longitudinal direction in the accommodation space 3e cannot be expected so much.
The present invention has been devised to solve such a problem, and by adopting a structure in which a steel pulling and a bundle are firmly connected by a one-touch method, a solid floor structure is obtained. The purpose is to build workability.
[0006]
[Means for Solving the Problems]
In order to achieve the object, the connection structure of the present invention includes a bundled material and a steel pulling that can be connected by a one-touch method. In the bundle, a large receiving plate is fixed to the upper end of a support bolt that stands up from the ground.
The large receiving plate bends the opposite edges diagonally downward to form a bent portion, and the support piece is cut and raised from the seating surface at a position substantially in the center of the bent portion, and the other opposite edge centers are bent upward. And restraint protrusions. A fixed portion of a leaf spring in which a locking piece and a guide piece are formed is fixed to the bent portion through a narrow elastic deformation portion.
[0007]
The steel pull connected to the bundle has a substantially rectangular hollow cross section with an open bottom, and a seating side placed on the upper surface of the large receiving plate between the fixed portion of the leaf spring and the restraining protrusions on both sides. The guided side rises from the inside of the guide portion of the leaf spring at the same inclination angle, the end of the guided side is bent acutely to become an engagement piece, and has a side wall that rises vertically upward from the inside of the seating side Yes.
When the steel pulling seat is in contact with the large pulling plate, the lower part of the side wall of the steel large pulling is sandwiched between the restraining projection of the large pulling plate and the support piece, and the plate spring is locked to the engagement piece. When the pieces are brought into surface contact and mesh with each other, the steel pulling is connected to the bundle.
[0008]
Embodiment
In the bundle 10 used in the present invention, for example, as shown in FIG. 3A, a large receiving plate 12 is fixed to the upper end of a support bolt 11 by welding or the like, and the steel large drawing 20 is supported by the large receiving plate 12. . As the support bolt 11, one having a height adjusting mechanism such as a turnbuckle is used as in the conventional case.
Both sides of the large receiving plate 12 are bent portions 12a and 12a bent obliquely downward at an inclination angle α (FIG. 3b), and a leaf spring 13 is fixed to the outer surface of the bent portions 12a and 12a. Supporting pieces 12c and 12c cut and raised from the seating surface 12b stand up obliquely at substantially the center of the bent portion 12a. When one or more ribs 12d, 12d extending from one bent portion 12a toward the other bent portion 12a are formed on the seating surface 12b, the rigidity of the large receiving plate 12 is improved and bending deformation is prevented. In addition, the center of the edge of the seating surface 12b is bent upward to form restraining protrusions 12e and 12e for retaining the steel pulling 20 from the inside.
[0009]
The leaf spring 13 fixed to the bent portion 12a passes through the elastic deforming portion 13b having a narrow width from the wide fixing portion 13a, the locking piece 13c is bent inward, and the locking piece 13c is further bent outward. Thus, a guide piece 13d is formed. Since the plate spring 13 has the same width between the fixing portion 13a and the locking piece 13c and the elastic deformation portion 13b is narrow, when the force for expanding the plate spring 13 is applied, the fixing portion 13a As a starting point, the elastic deformation portion 13b is elastically deformed sideways exclusively.
The angle β (FIG. 3b) between the elastic deformation portion 13b and the locking piece 13c is set to be less than the inclination angle α in order to incline the locking piece 13c downward toward the center of the seating surface 12b. . The angle γ between the locking piece 13c and the guide piece 13d is set at an acute angle so that the guide piece 13d is widened.
[0010]
The steel pulling 20 connected to the bundle 10 is produced by forming a steel plate on a rectangular end face having an open bottom. The guided pieces 22 and 22 are bent obliquely upward from the seating pieces 21R and 21L seated on the seating surface 12b of the large pulling plate 12 at the lower part of the steel pulling plate 20, and the side tips of the guided pieces 22 and 22 are bent. Further, the engagement pieces 23 are formed by bending. Between the side walls 24, 24 is an opening 25 into which the restraining projection 12e is fitted.
The angle between the seating piece 21R and the guided piece 22 is preferably smaller than the angle (α−β + γ) between the seating surface 12b and the guide piece 13d. Thereby, when the steel pulling 20 is pushed between the pair of leaf springs 13, 13, the guided piece 22 is guided by the guide piece 13 d while moving the leaf springs 13, 13 and moves downward. The engaging piece 23 is inclined at an angle equal to the angle (α−β) between the seating surface 12b and the locking piece 13c in order to bring the locking piece 13c in the locked state into surface contact.
[0011]
When the steel puller 20 is pushed in between the leaf springs 13 and 13 as indicated by arrows in FIG. 3A, the guided pieces 13d and 13d of the leaf springs 13 and 13 are pushed by the guided pieces 22 and 22, respectively. The seating pieces 21R and 21L descend while spreading. When the seating piece 21R reaches the seating surface 12b, the front ends of the locking pieces 13c and 13c get over the guided pieces 22 and 22, and the leaf springs 13 and 13 are elastically restored in the direction of narrowing each other. As a result, the engagement piece 23 is engaged with the engagement piece 23 in a surface contact state, and the contact surface between the engagement piece 23 and the engagement piece 13c is inclined downward toward the center of the large receiving plate 12. The steel pulling 20 is firmly connected to the bundle 10. A cross-sectional view of the steel puller 20 connected to the bundle 10 in the longitudinal direction of the steel puller 20 is shown in FIG. A side view is shown in FIG.
[0012]
As a connecting procedure, it is possible to fit the steel pulling 20 into the bundle 10 standing on the ground GL. However, the bundle 10 having a height adjusting function such as a turnbuckle is previously drawn into the steel pulling. The method of being fitted to 20 and standing on the ground GL is excellent in workability.
[0013]
In this way, the steel pulling 20 is connected to the bundle 10 without rattling by the engagement of the locking portion 13d and the locking side 23. Even if an upward force is applied to the steel pulling 20 attached to the bundle 10, the seating sides 21R, 21L, the guided sides 22, 22 and the lower portions of the side walls 24, 24 are the seating surface 12b, the support piece 12c, and Since the shape is retained by the restraining protrusions 12e, the engagement between the locking portion 13d and the locking side 23 is not released. Moreover, since the locking portion 13d and the locking side 23 are in surface contact with the downward inclination angle α toward the central portion of the large pull receiving plate 12, the steel large pull 20 is firmly connected to the bundle 10. . Furthermore, even if the positional relationship is slightly shifted when the steel puller 20 is fitted into the bundle 10, excessive deformation of the leaf spring 13 is restricted by the support piece 12 c, so that deformation of the leaf spring 13 is also prevented. The elastic locking force of the spring 13 is used effectively.
[0014]
After fixing the bundle 10 in a predetermined positional relationship along the longitudinal direction of the steel pull 20, the bundle 10 is connected to the support bolt 11 (FIG. 2) standing from the ground GL, and the steel large The floor panel 2 (FIG. 1) is disposed on the upper surface 26 of the pull 20 to construct a solid floor structure. At this time, since the steel puller 20 is connected to the bundle 10 by a one-touch system in which the steel puller 20 is fitted into the puller receiving plate 12, workability is greatly improved.
[0015]
【The invention's effect】
As described above, in the connection structure of the present invention, the engagement side formed on the spring part of the bundle and the engagement side of the steel pulling are engaged and engaged in a surface contact state. Since the lower part of the steel pull is held by the large pull receiving plate, the steel pull is firmly connected to the bundle without releasing the meshing state, and the pulling force in the vertical direction or along the longitudinal direction A connection structure that is resistant to misalignment is obtained. Moreover, since the steel pulling is connected by a one-touch operation in which the steel pulling is inserted between the leaf spring and the support piece, workability is greatly improved. When a joist is placed on the steel pull attached in this way and a floor panel is laid, a firm floor structure is easily constructed.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a floor structure. FIG. 2 is a diagram illustrating a conventional structure for connecting a steel pull to a bundle. FIG. 3 is a diagram illustrating a connection structure according to the present invention. A perspective view (a) of the large pull 20, a cross-sectional view (b) of the leaf spring 13 fixed to the bundle 10, a cross-sectional view (c) showing a connected state, and a side view (d)
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10: Bundle 11: Support bolt 12: Large receiving plate 12a: Bending part 12b: Seating surface 12c: Support piece 12d: Rib 12e: Restraining protrusion 13: Leaf spring 13a: Adhering part 13b: Elastic deformation part 13c: Locking piece 13d: Guide piece 20: Steel pulling 21R, 21L: Seating side 22: Guided side 23: Engagement piece 24: Side wall 25: Opening part α: Locking part of leaf spring and locking side of steel pulling Angle β: angle between the elastic deformation portion of the leaf spring and the locking piece γ: angle between the locking piece of the leaf spring and the guide piece

Claims (1)

The opposite edges are bent obliquely downward to form a bent portion, and the support piece is cut and raised from the seating surface at a position substantially hitting the center of the bent portion, and the other opposite edge centers are bent upward to form a restraining protrusion. The large receiving plate is fixed to the upper end of the support bolt that stands up from the ground, and the fixed portion of the leaf spring on which the locking piece and the guide piece are formed is fixed to the bent portion of the large receiving plate through the narrow elastic deformation portion. With bundles,
It has a substantially rectangular hollow cross section with an open bottom, and has the same inclination angle as the guide part of the leaf spring from the inside of the seating side placed on the upper surface of the large receiving plate between the fixed part of the leaf spring and the restraining protrusions on both sides The guided side rises, and the end of the guided side is bent at an acute angle to become an engagement piece, with a steel pulling with a side wall that rises vertically upward from the inside of the seating side,
When the steel pulling seat is in contact with the large pulling plate, the lower part of the side wall of the steel large pulling is sandwiched between the restraining projection of the large pulling plate and the support piece, and the plate spring is locked to the engagement piece. A steel pulling connection structure characterized in that the pieces are in surface contact and mesh with each other.

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