JP3811177B1 - Lip channel steel and its fittings - Google Patents

Abstract

A first object of the present invention is to provide a new lip channel steel having higher rigidity than the conventional one, and the second object is suitable for such a new lip channel steel. Is to provide a simple connecting bracket.
A lip channel steel 10 according to the present invention is characterized in that at least a lip wall 14 and a back wall 16 have a bent portion 18 having a V-shaped cross section extending in a longitudinal direction.
In addition, the connecting fitting 20 of the present invention has a support fitting 21 having a locking portion 27 that locks the folding portion 18 on the surface of the lip wall 14, and a side surface 18 b of the folding portion 18 on the back side of the lip wall 14. It comprises a fastener 22 having an abutting portion 32 in contact therewith, and is detachably fixed to the lip groove steel 10 so as to sandwich the lip wall 14.
[Selection] Figure 3

Description

  The present invention relates to a lip channel steel and a connection fitting used therefor.

  As shown in FIG. 10, the conventional lip groove steel 100 has a lip groove 102 extending along the longitudinal direction on one side surface of a wide rectangular steel pipe, and its cross section has a C-shape. Structural members such as steel houses and steel buildings such as ordinary houses, such as roof and wall base materials, taking advantage of high rigidity and light weight, easy to process and easy to assemble It is used a lot. However, it is desired to develop a lip groove steel with higher rigidity and light weight in order to improve earthquake resistance for recent buildings and to reduce costs.

  By the way, for example, vertical and horizontal trunk edges of ordinary houses have been constructed by arranging the lip groove steels vertically and horizontally and welding the lip groove steels together. However, there are problems such as the occurrence of distortion due to welding heat, the need to paint the welded portion, or the need for skill in the welding operation, and the connection structure of lip channel steels using connection fittings has come to be used.

As an example of a connection fitting for connecting conventional lip channel steels, a connection fitting 110 as shown in FIGS. 11 and 12 is known (see Patent Document 1). In this connecting metal fitting 110, one bent piece 122 of an L-shaped metal fitting 120 bent in an L-shape is overlapped on the lip 104 of the lip groove steel 100, and a U-shaped metal fitting 130 is applied to the back side of the lip 104. In this state, the lip 104 is sandwiched and fastened with bolts 140 and nuts 150 from above and below. The bent piece 124 on the other side of the L-shaped bracket 120 is provided with a bolt hole 126 so that it can be fixed to the other lip groove steel with a bolt (not shown). However, such a connection fitting is not always satisfactory because the L-shaped fitting 120 may rotate around the fastening bolt 140 or may be displaced in the longitudinal direction.
Japanese Patent No. 3207818

  The present invention has been made to solve the above-mentioned problems, and a first object of the present invention is to provide a novel lip channel steel having a higher rigidity than the conventional one, and a second object thereof. Is to provide a connection fitting suitable for such a new lip channel steel.

The lip groove steel according to the present invention is a lip groove steel having a C-shaped cross section comprising a lip wall facing the lip groove, a side wall perpendicular to the lip wall, and a rear wall perpendicular to the side wall. Te, and stretched in the longitudinal direction into at least a lip wall and the wall behind, and have a folding portion of the V-shaped cross section that protrudes surface facing lip wall and the wall behind, folded portion which is formed on the lip wall and Spoons The folded portion formed on the wall is characterized by being in a line-symmetrical position with a center line that bisects the width of the side wall as a symmetry axis .

  Since the lip channel steel of the present invention has a fold portion extending in the longitudinal direction on the lip wall and the back wall, it exhibits higher rigidity than a conventional lip channel steel having no fold portion. Can do. Therefore, if the cross-sectional dimensions other than the bent portion are the same, the length of the member can be made longer. For example, when it is used as a horizontal trunk edge of a steel house, the span can be expanded more than before, and the main members can be reduced. Moreover, even if it is lighter than the conventional lip groove steel, such as by reducing the thickness, the same rigidity as the conventional lip groove steel can be exhibited.

In the lip groove-shaped steel of the present invention, the bent line portion is a V-groove of a V-shaped cross section, the V grooves that protrude on the side facing the lip wall and the wall behind. The V-groove is easy to form and is effective for reducing the bending in the longitudinal direction of the lip groove steel. In addition, by providing a V-groove projecting on the opposite surface side of the lip wall and the back wall, the surface side of the lip wall and the back wall can be stably connected to other lip groove steel and other members via connecting fittings. can do.

Further, in the lip groove-shaped steel of the present invention, Ru position near the line of symmetry of the center line bisecting a width of the side wall as a symmetric axis and bent line portion formed in the folding portion and the wall behind which is formed on the lip wall . Since the folded part formed on the lip wall and the folded part formed on the back wall are in a line-symmetrical position with the center line dividing the width of the side wall in two as the symmetry axis, It can be used in common with the lip wall side.

  The lip groove steel coupling metal fitting of the present invention is a lip groove shape having a C-shaped cross section comprising a lip wall opposed across a lip groove, a side wall extending perpendicularly to the lip wall, and a back wall perpendicular to the side wall. A steel fitting, which is detachably fixed to a lip groove steel having a fold extending in the longitudinal direction at least on the lip wall and the back wall, and is disposed on the surface of the lip wall and has at least one fold And a support fitting having an insertion hole through which a bolt is inserted and an abutting portion arranged on the back side of the lip wall and in contact with the back side of the folded part, and an insertion hole through which the bolt is inserted The lip wall is sandwiched between the support bracket and the clamp, the bolt is inserted into the insertion hole, and the nut is screwed to tighten the support bracket and the clamp. With brackets That.

  In the lip channel steel connecting bracket of the present invention, the locking portion of the support bracket engages with the bent portion on the front side of the lip channel steel, and the contact portion of the fastener on the back side of the bent portion on the back side. Since it contacts, a connection metal fitting can be firmly fixed to the arbitrary positions of a lip channel steel.

  In the lip groove steel connecting bracket of the present invention, it is preferable that the support bracket is an L-shaped bracket in which the contact surfaces contacting the upper surface of the lip wall are orthogonal to each other. By using the L-shaped metal fittings, the lip groove steels or the lip groove steels and other members can be easily connected vertically.

  In the lip channel steel connecting bracket of the present invention, it is desirable that the fastener is formed with a pair of engaging portions for engaging a nut in the vicinity of the bolt hole of the fastener so as to protrude on the back surface side. After fastening a predetermined nut to this locking part, the fastening bracket is arranged on the back side of the lip wall, a bolt is inserted from the front side and screwed into the nut, thereby tightening the support fitting and the fastening bracket. It can be carried out only from the surface side.

Further, in the lip channel steel connecting metal fitting of the present invention, the support metal fitting may be a contact plate that engages with a bent portion of the opposing lip wall and holds the lip groove at a predetermined width.
The lip groove width can be held with high accuracy by such a backing plate and the fastener, and deformation such as bending and twisting of the lip groove steel can be suppressed, so that the assembly accuracy of the structure can be improved and the assembly work can be performed. Can be improved.

  Note that structures such as vertical and horizontal trunk edges using the lip groove steel and connecting metal fittings according to the present invention have a fastening structure with bolts and nuts, and therefore are easy to assemble and disassemble. Therefore, in addition to requiring skill in assembling work, particularly in the case of temporary structures, it is possible to easily dismantle after use and to reuse the lip groove steel and the connecting bracket for other structures.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the common description is attached | subjected to a common location about each embodiment, and the overlapping description is abbreviate | omitted.

(First embodiment: Lip groove steel)
FIG. 1 shows an example of a cross-sectional shape of the lip groove steel of the present invention, and FIG. 2 shows a perspective view thereof. As shown in FIG. 1, the lip channel steel 10 of the present invention includes a lip wall 14 that is opposed to a lip groove 12, a side wall 15 that is perpendicular to the lip wall 14, and a rear wall 16 that is perpendicular to the side wall 15. And at least the lip wall 14 and the back wall 16 have a fold 18 extending in the longitudinal direction. In the present embodiment, the bent portion 18 is a V-shaped V-shaped cross section that is easy to form and is strong against bending, and the V-shaped groove 18 is formed to project to the facing surface side of each of the lip wall 14 and the back wall 16. ing. The V-groove 18 is formed at a line-symmetrical position between the lip wall 14 and the back wall 16 with the center line L that divides the width W1 of the side wall 15 as the symmetry axis.

  By forming such a V groove 18, the lip groove steel 10 of the present invention can exhibit higher rigidity than the conventional lip groove steel 100 without the V groove shown in FIG. 10. . Therefore, when the lip groove steel 10 is applied to a horizontal trunk edge of a building such as a steel house, the span can be expanded as compared with the conventional lip groove steel 100. For this reason, the main member for construction can be reduced and the cost can be reduced. Further, if the cross-sectional shape of the C-shaped cross section is the same as that of the conventional product, the plate thickness can be reduced to reduce the weight.

  In addition, since the width stop fitting described later can be easily attached at a desired position in the longitudinal direction of the lip groove, the expansion of the lip groove width W2 due to internal stress can be suppressed, and the buckling of the lip groove steel 10 can be suppressed. Strength can be improved.

The lip channel steel of the present invention is not limited to the above embodiment, and may be changed without departing from the gist of the present invention. For example, in the present embodiment is the number of folding Re section 18 was one by one for each lip may be plural. By increasing the number of V-grooves, it is possible to further improve the mounting accuracy of the lip channel steel 10 by suppressing bending and twisting.

(Second embodiment: connecting bracket)
3 to 6 relate to the embodiment of the connecting metal fitting of the present invention, FIG. 3 is a front view of the connecting metal fitting, FIG. 4 is a side sectional view of the connecting metal fitting, FIG. 5 is a perspective view of the L-shaped metal fitting, FIG. 6 shows a perspective view of the fastener.

  The connecting metal fitting 20 of the present embodiment is composed of an L-shaped metal fitting 21 that is a support metal fitting and a fastening metal fitting 22, and is detachably fixed to the lip groove steel 10 with a bolt 23 and a nut 24. As shown in FIGS. 4 and 5, the L-shaped bracket 21 is formed by bending a rectangular steel plate into an L shape to form a contact portion 25 that is orthogonal to each other. Has a bolt hole 26 formed therein. Further, both edge portions 27 of each abutment portion 25 have a V-groove surface 18a of the lip wall 14 in the direction opposite to the abutment direction with the lip groove steel 10, that is, the direction bent in an L shape (see FIG. It is bent so as to engage with 3). In FIG. 5, a reinforcing portion 28 is formed in a triangular pyramid shape at the bent portion of the L-shaped bracket 21.

  The fastener 22 is formed by bending a rectangular steel plate into a channel shape to form a bottom portion 31 and an upright portion 32, and a bolt hole 33 is formed in a substantially central portion of the bottom portion 31. Further, both side edges 34 of the standing portion 32 are chamfered so as to abut on the side surface 18 b (FIG. 3) of the V-groove 18 projecting to the back surface side of the lip wall 14. Has become a department. In addition, a pair of cut and raised pieces 35 (FIG. 3) centering on the bolt hole 33 is formed on the back surface on both sides of the bolt hole 33 on the bottom portion 31. The pair of cut-and-raised pieces 35 serve as a locking portion that integrally locks the nut 24 screwed with the bolt 23 to the fastener 22.

  Next, the operation of the connection fitting 20 having the above configuration will be described.

  First, the nut 24 is integrally locked via the cut and raised piece 35 on the back surface side of the fastener 22. In this state, the fastener 22 is inserted from the lip groove 12 into a predetermined position in the longitudinal direction of the lip groove steel 10 and arranged on the back side of the lip wall 14.

  As shown in FIG. 3, the raised portion 32 of the disposed fastener 22 has a substantially trapezoidal shape, and both oblique sides (side sides) 34 abut against the inclined surface 18 b of the V groove 18 as described above, thereby The position in the width direction can be accurately positioned.

  Next, one abutting portion 25 of the L-shaped bracket 21 is arranged so that the center line of the bolt hole 26 and the center line of the bolt hole 33 of the fastener 22 arranged as described above coincide with the upper surface of the lip wall 14. Place. At this time, the two edge portions 27 of the contact portion 25 are arranged so as to engage with the inclined surface 18 a of the V groove 18 formed in the lip wall 14.

  Subsequently, the lip wall 14 is sandwiched between the abutting portion 25 of the L-shaped metal fitting 21 arranged in this way and the fastening metal fitting 22, and the bolt 23 is inserted into the insertion holes 26 and 33 and fastened by the nut 24. As a result, both edge portions 27 of the abutting portion 25 of the L-shaped metal fitting 21 extend in the direction of narrowing the width W2 (FIG. 1) of the lip groove 12 along the inclined surface 18a of the V groove 18 formed in each lip wall 14. In addition to being locked, the upright portion 32 of the fastener 22 abuts in the direction of widening the width W2 of the lip groove 12 along the corresponding inclined surface 18b on the back surface of the V-groove 18, so In addition, the lip groove width W2 can be held with high accuracy. For this reason, deformations such as bending and twisting of the lip groove steel are suppressed, so that the mounting accuracy is improved, workability is improved, and a highly accurate structure can be obtained.

  Then, another lip groove steel or other member (not shown) is fastened to the other abutting portion 25 ′ (FIG. 3) of the L-shaped bracket 21, so that the lip groove steels or the lip groove steel and the other member are joined together. Can be connected so as to be orthogonal to each other.

  In the present embodiment, the fastener 22 constituting the connecting bracket is configured to be inserted into the back surface side of the lip wall 14 via the lip wall opening (lip groove) 12 of the lip groove steel 10 and the fastener. The bottom portion 31 of the bottom 22 is cut and raised to form a piece 35 to hold the nut 24. Therefore, the trouble of arranging the fasteners and nuts by turning the hand to the back side does not occur.

(Third embodiment: Width stopper)
The second embodiment uses an L-shaped metal fitting that is suitable as a connecting metal fitting that connects lip groove-shaped steels or a lip groove-shaped steel and another steel frame by vertically butting them together. However, the rigidity of the lip channel steel 10 can be increased by replacing the L-shaped bracket of the above-described coupling bracket with a width-stopping bracket that couples lip walls facing each other with a lip groove therebetween instead of a backing plate as described below. It can be further increased.

  As described above, the third embodiment of the present invention is a width stopper. FIG. 8 is a schematic front view illustrating the width stop metal fitting 40. The width stop metal fitting 40 is the above-mentioned connection metal fitting 20 except that the support metal fitting arranged on the lip wall 14 of the lip groove steel 10 in the connection metal fitting 20 is replaced by the L-shaped metal fitting 21 and a backing plate 41 shown in FIG. It is the same composition as. That is, the width stop metal fitting 40 includes a contact plate 41 and a fastening metal piece 22 and is detachably fixed to the lip groove steel 10 with the bolt 23 and the nut 24.

  The caulking plate 41 is formed with an insertion hole 42 through which the bolt 23 is inserted at substantially the center thereof, and both edge portions 43 of the caulking plate 41 are lip channel steel similarly to the abutting portion 25 of the L-shaped metal fitting 21. It is bent so as to be engaged with the ten V-groove surfaces 18a (FIG. 8). Note that a reinforcing portion 44 is formed on the contact plate 41 in a direction opposite to both edge portions 43.

  In the width stopper 40, the fastener 22 is the same as that of the above-described connecting bracket 20, and the width stopper 40 sandwiches the lip wall 14 between the abutting plate 41 and the fastener 22, and the lip groove steel 10 has a lip. The width W2 of the groove 12 can be fixed firmly with high accuracy. For this reason, the rigidity of the lip channel steel 10 can be further increased. As a result, the occurrence of bending or twisting of the lip groove steel 10 as a structural member can be suppressed to a smaller level, and a structure with high dimensional accuracy can be constructed.

  For example, in order to improve seismic resistance, by arranging a plurality of width stoppers 40 at appropriate portions of the lip groove of the lip groove steel, the concentrated load generated by the earthquake can be reduced and the lip groove steel can be obtained. It can avoid buckling.

  The connection fitting of the present invention is not limited to the above-described embodiment, and may be changed without departing from the gist of the present invention. For example, in the second embodiment, the lip groove steel is abutted vertically on the lip wall side using an L-shaped bracket and a fastener, but a bolt hole is formed in the rear wall 16 of the lip groove steel. Then, the L-shaped bracket 21 'may be disposed on the back surface and fastened with a bolt and a nut without using a fastener.

  FIG. 9 is a view of the lip groove steel 10 with the connecting metal fitting 21 attached to the lip wall 14 side and the L-shaped metal fitting 21 ′ attached to the back wall 16 as viewed from the end face side. The L-shaped bracket 21 ′ is fastened to the rear wall 16 with a single bolt. However, since it is engaged with the V groove 18 by the locking portion 27, the L-shaped bracket 21 ′ is securely fixed to a desired portion without causing positional deviation such as rotation. can do. A structure as shown in FIG. 9 is suitable for use in, for example, a base structure around a sash or a sash around a general house.

  The lip groove steel of the present invention can be suitably used as a structural member such as a steel house or a steel structure, and the connecting metal fitting of the present invention can be used by connecting lip groove steels or lip groove steel with other members. It is suitable as a connecting mechanism for steel frames for connection. In particular, it is suitable as a base member for a trunk purlin such as a general house or a steel house.

It is a section schematic diagram showing an example of the lip channel steel of the present invention. FIG. 2 is a perspective view of a lip channel steel having the cross section of FIG. 1. It is a front view explaining the composition outline of the connecting metal fitting of a 2nd embodiment. It is XX sectional drawing of FIG. It is a perspective view which shows the outline | summary of the L-shaped metal fitting of 2nd Embodiment. It is a perspective view which shows the outline | summary of the fastener of 2nd Embodiment. It is a top view of the metal backing in a 3rd embodiment. It is a front view explaining the outline of composition of a width stop metal fitting of a 3rd embodiment. It is explanatory drawing of the connection part explaining the lip groove steel which mounted | wore with two connection metal fittings facing each other. It is a cross-sectional schematic diagram which shows an example of the conventional lip channel steel. It is a front schematic diagram explaining the conventional connection metal fitting. It is a ZZ cross-sectional schematic diagram of FIG.

Explanation of symbols

10: Lip groove shape steel 12: Lip groove (opening) 14: Lip wall 16: Back wall 18: Folded portion (V groove) 20: Connecting bracket 21: L-shaped bracket 22: Fastening bracket 23: Bolt 24: Nut 25 : Contact part 26: Insertion hole 27, 43: Locking part 31: Bottom part 32: Standing part

Claims (5)

A lip groove steel having a C-shaped cross section consisting of a lip wall opposed to the lip groove, a side wall perpendicular to the lip wall, and a back wall perpendicular to the side wall,
Extending longitudinally at least the lip wall and the wall behind, and have a folding portion of the V-shaped cross section projecting on the opposite surface side of the lip wall and the wall behind,
The lip channel steel characterized in that the folds formed on the lip wall and the folds formed on the back wall are in a line-symmetrical position with a center line that bisects the width of the side wall as an axis of symmetry. . A lip groove steel having a C-shaped cross section comprising a lip wall opposed to the lip groove, a side wall continuous to the lip wall, and a back wall perpendicular to the side wall, and at least the lip wall and the back wall A connecting fitting that is detachably fixed to the lip groove steel having a bent portion extending in the longitudinal direction of the lip groove steel,
A support fitting that has an engaging portion that is arranged on the surface of the lip wall and that engages with at least one of the bent portions, and has an insertion hole for inserting a bolt;
A fastener having an abutting portion disposed on the back side of the lip wall and abutting on the back side of the folded portion and having an insertion hole for inserting the bolt;
Consists of
A lip groove shape characterized by holding the lip wall between the support metal fitting and the fastening metal fitting, and inserting the bolt into the insertion hole and screwing the nut to fasten the support metal fitting and the fastening metal fitting. Steel connecting bracket. The lip groove-shaped steel coupling metal fitting according to claim 2 , wherein the support metal fittings are L-shaped metal fittings whose abutting surfaces abutting on the upper surface of the lip wall are orthogonal to each other. The lip channel steel connecting bracket according to claim 2 , wherein the fastener includes a pair of engaging portions for engaging the nut in the vicinity of a bolt hole of the fastener protruding to the back surface side. The lip channel steel coupling metal fitting according to claim 2 , wherein the support metal fitting is a contact plate that engages with the bent portion of the opposing lip wall and holds the lip groove at a predetermined width.

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