JP5932756B2 - C-shape steel fixing bolt - Google Patents

Description

  The present invention relates to a C-shaped steel fixing bolt used when assembling a window frame or the like of a steel structure building with C-shaped steel.

  This type of C-shaped steel fixing bolt is, as is conventionally known from Patent Document 1 and the like, a presser fitting that holds both lip portions of the C-shaped steel from the inside of the C-shaped steel, and a T-shape on the inner side of the bolt head. In addition, it is attached so as not to rotate relative to the bolt. Such a C-shaped steel fixing bolt penetrates a wide slit-shaped opening between the lip portions on both sides of the C-shaped steel, and in use, this bolt is positioned at the center of the width of the slit-shaped opening. Need to be centered. Conventionally, as described in Patent Document 1, a method of forming a centering protrusion that fits into the slit-shaped opening in the presser fitting, or the presser fitting on the left and right side plate portions of C-shaped steel. For example, a method of forming a centering side plate portion that is sandwiched from both the left and right sides and centered has been employed.

Japanese Patent Laid-Open No. 11-6209

  In the method of forming the centering protrusion on the presser fitting, it is necessary to set the protrusion amount of the centering protrusion assuming that the thickness of the plate material forming the C-shaped steel is the smallest. The fitting depth of the centering protrusion on the presser fitting side with respect to the slit-shaped opening between the lip portions on both sides of the shaped steel becomes very shallow and cannot be reliably functioned. Further, in the method of forming the centering side plate portion of the presser fitting on the C-shaped steel itself, a general-purpose C-shaped steel cannot be used, so that the cost becomes very high.

The present invention proposes a C-shaped steel fixing bolt capable of solving the conventional problems as described above, and the C-shaped steel fixing bolt according to the present invention is the same as the embodiment described later. In order to facilitate understanding of the relationship, the reference numerals used in the description of the embodiment are shown in parentheses, and both lip portions (23a, 23b) of the C-shaped steel (22) are connected to the C-shaped steel ( 22) The presser fitting (4) that can be pressed from the inside of the bolt (2) has a T-shape on the inner side of the head of the bolt (2) at the center in the length direction, and is attached to the bolt (2) so as not to be relatively rotatable. In the steel fixing bolt (1), the rotation limiting plate (3) is disposed between the head (6) of the bolt (2) and the presser fitting (4), and the bolt (2 ) And the presser fitting (4) and the rotation limiting plate (3) are placed between the lip portions (23a, 23b) of the C-shaped steel (22) and inside the C-shaped steel (22). After inserting, the bolt (2)
The bolt (2) is rotated in the tightening direction of the nut (25) with respect to the holder, and the presser fitting (4) is turned in a direction in which both ends hold the both side lip portions (23a, 23b) of the C-shaped steel (22). In this case, both ends of the rotation limiting plate (3) are in contact with the inner surfaces of the parallel side plates (24a, 24b) of the C-shaped steel (22) to limit the further rotation of the bolt (2). Yes.

  The C-shaped steel fixing bracket of the present invention can be used as follows. That is, a bolt with a presser fitting and a rotation restricting plate fixed to the inside of the head is inserted downward into a bolt hole of a C-shaped steel cradle for mounting and fixing the C-shaped steel. When both lip parts are placed in a direction to be supported on the C-shaped steel cradle part, the bolts are rotated from below the C-shaped steel cradle part so that the length direction of the presser fitting and the rotation limiting plate is C In parallel with the length direction of the section steel, the presser fitting and the rotation limiting plate are inserted into the inside of the C-section steel from the wide slit-shaped opening between both lip sections of the C-section steel. In this state, the bolt is rotated in the tightening direction of the nut with respect to the bolt, and the presser fitting is turned in a direction in which both ends press the both side lip portions of the C-shaped steel. At this time, both ends of the rotation limiting plate are in contact with the inner surfaces of the C-shaped steel parallel both side plates to limit further rotation of the bolts.

  Therefore, the operator does not need to be particularly conscious of setting the presser fitting in such a way that both ends are in the direction of pressing the both side lip portions of the C-shaped steel and the overlap margin between the both ends and the both side lip portions of the C-shaped steel is equal. I can do it. In this state, a nut is screwed and fastened to the screw shaft portion of the bolt projecting downward from the C-shaped steel cradle portion, so that both side lip portions of the C-shaped steel are connected to the C-shape at both ends of the presser fitting. It can be pressed and fixed on the steel cradle. Of course, it is also possible to prevent both ends of the rotation restricting plate from coming into contact with the inner surfaces of the parallel C-shaped steel plates so that the bolts rotate together during the nut tightening operation and the orientation of the presser fitting changes. To do.

  According to the C-shaped steel fixing bracket of the present invention that can be used as described above, the presser fitting only needs to be provided with both end portions that come into contact with both lip portions of the C-shaped steel to be fixed. Therefore, there is no need to provide a special centering protrusion corresponding to the thickness of the C-shaped steel, and the presser fitting itself can be manufactured simply and inexpensively. In addition, C-shaped steels to be fixed need to have both side lip portions that can be pressed at both ends of the presser fitting and have a certain width between the inner surfaces of the parallel side plates. Even if it is necessary to add a rotation limiting plate that can be easily and inexpensively manufactured by flat plate die-cutting, the overall economic effect is great.

When carrying out the present invention, the bolt (2) has an angular shaft portion (7) at the inner end adjacent to the head portion (6).
The presser fitting (4) has an arcuate back plate portion (13) that curves toward the tip side of the bolt (2) toward both ends in the length direction, and the arcuate back plate portion (13). It consists of a press-formed product consisting of left and right side plate parts (14a, 14b) integrally connected from the both sides of the bolt (2) to the tip side of the bolt (2), in the center of the arc-shaped back plate part (13) The square cylindrical peripheral wall (15a) is provided with a burring square hole (15) projecting inward, and the burring square hole (15) of the presser fitting (4) and the square hole (8) of the rotation restricting plate (3) are provided. In a state of being externally fitted to the square shaft portion (7) of the bolt (2), the square cylindrical peripheral wall (15a) of the burring square hole (15) of the presser fitting (4) is connected to the square shaft of the bolt (2). Press and deform so that it comes into pressure contact with the screw shaft part (5) following the part (7), and fix the presser fitting (4) and the rotation limiting plate (3) inside the head (6) of the bolt (2). I can do it. According to this configuration, a strong C-shaped steel fixing bolt can be assembled without using welding and without using other fasteners such as screws.

The rotation limiting plate (3) has a shape including a tapered arm plate portion (10a, 10b) extending in both the left and right directions from the central portion (9) fixed to the bolt (2). (3), both ends of the tapered arm plate portion (10a, 10b) are shifted from the opposite ends of the presser fitting (4) to the opposite side of the tightening direction of the nut (25) with respect to the bolt (2). At both ends of the tapered arm plate portion (10a, 10b), arcuate tip side edges (12a, 12b) that contact the inner surfaces of the parallel side plates (24a, 24b) of the C-shaped steel (22) are attached. It can be formed. According to this configuration, the rotation limiting plate can be configured by using a flat plate of the minimum necessary size, and the bolt is arranged in the width direction of the wide slit-shaped opening between both lip portions of the C-shaped steel. It is possible to smoothly perform the centering action on the bolt and the presser fitting from the state shifted from the center position to one side.

FIG. 1A is a partially longitudinal side view showing a use state of a C-shaped steel fixing bolt of the present invention, and FIG. 1B is a transverse plan view thereof. FIG. 2A is a partially longitudinal side view showing a state immediately before use of the C-shaped steel fixing bolt of the present invention, and FIG. 2B is a transverse plan view thereof. 3 shows each part of the C-shaped steel fixing bolt of the present invention, FIG. 3A is a side view of the bolt, FIG. 3B is a bottom view of the bolt, and FIG. 3C is a plan view of the rotation limiting plate. 3D is a cross-sectional view taken along line AA in FIG. 3C, FIG. 3E is a plan view of the presser fitting, and FIG. 3F is a cross-sectional view taken along line BB in FIG. 3E. FIG. 4 is a longitudinal side view of the assembled C-shaped steel fixing bolt.

  As shown in FIGS. 3 and 4, the C-shaped steel fixing bolt 1 of the present invention includes a bolt 2, a rotation limiting plate 3, and a presser fitting 4. The bolt 2 is formed by forming a square shaft portion 7 having a square cross section whose side length is slightly larger than the outer diameter of the screw shaft portion 5 between the screw shaft portion 5 and the plate head 6. 5 is formed with a groove 5a for rotational operation. The illustrated groove 5a is a minus-shaped groove, but may be a plus-shaped groove or a square hole.

  The rotation restricting plate 3 is formed by punching a metal flat plate, and is provided on both the left and right sides from a central portion 9 provided with a square hole 8 having a size that can be just fitted to the angular shaft portion 7 of the bolt 2. Tapered arm plate portions 10a and 10b that become narrower toward the distal end side are connected to each other, and bent end portions 11a and 11b that are bent in a clockwise direction in plan view are formed at the distal ends of the tapered arm plate portions 10a and 10b. The outer edges of the bent end portions 11a and 11b are smoothly chamfered to form arcuate tip side edges 12a and 12b.

  The presser fitting 4 has an arcuate back plate portion 13 that curves toward one side toward both ends in the length direction, and from both sides of the arcuate back plate portion 13 toward the center of curvature of the arc shaped back plate portion 13. A burring square hole 15 is formed of a press-formed product of a metal plate composed of left and right side plate portions 14a and 14b that are integrally provided, and a square cylindrical peripheral wall 15a projects inwardly at the center of the arcuate back plate portion 13. Is provided. The burring square hole 15 is of a size that can be just fitted onto the square shaft portion 7 of the bolt 2. C-shaped steel presser portions 16a and 16b formed on the lower sides of the left and right side plate portions 14a and 14b are provided at both ends 4a and 4b in the length direction of the presser fitting 4.

  The rotation restricting plate 3 is externally fitted to the square shaft portion 7 of the bolt 2 having the above-described configuration using the square hole 8 so as to be adjacent to the inside of the pan head 6 of the bolt 2, and then the burring square hole 15 is used. Then, the presser fitting 4 is fitted onto the square shaft portion 7 of the bolt 2 in a direction substantially along the rotation limiting plate 3, and the top surface of the arcuate back plate portion 13 of the presser fitting 4 is placed inside the rotation limiting plate 3. Adjacent to each other. At this time, a rectangular tube shape is formed so that the tip end portion of the rectangular tube-shaped peripheral wall 15a forming the burring rectangular hole 15 of the presser fitting 4 protrudes from the rectangular shaft portion 7 of the bolt 2 and is externally fitted to the screw shaft portion 5. The height of the peripheral wall 15a is set. Therefore, the presser fitting 4 is attached to the bolt 2 by crimping the tip end portion (for example, two places in the diametrical direction) of the square cylindrical peripheral wall 15a inward to form the crimping portion 17 that bites into the screw shaft portion 5. It is stuck to.

  As shown in FIGS. 1B and 2B, the C-shaped steel fixing bolt 1 of the present invention assembled as described above has the bent end portions 11 a and 11 b at both ends of the rotation restricting plate 3 as shown in FIGS. 1B and 2B. It is located outside the both end portions 4a and 4b in the length direction of and at a position slightly away from the both end portions 4a and 4b in the clockwise direction. The length of the presser fitting 4 and the length of the rotation limiting plate 3 are set in accordance with the C-shaped steel to be fixed so that they can be used as follows.

  In the example of use of the C-shaped steel fixing bolt 1 of the present invention shown in FIG. 1 and FIG. 2, the C-shaped steel receiving member 19 is bolted or welded to a predetermined height on the side surface of the columnar steel 18 of a steel structure building. The bolt hole 21 is drilled in the vertical direction in the C-shaped steel cradle 20 of the C-shaped steel receiving member 19. The C-shaped steel 22 to be fixed is placed on the C-shaped steel receiving member 19 in such a direction that both lip portions 23a and 23b are supported on the C-shaped steel pedestal 20 but before that, As shown in FIG. 2, the bolt 2 of the C-shaped steel fixing bolt 1 is inserted into the bolt hole 21 so that the length direction of the rotation limiting plate 3 and the presser fitting 4 is parallel to the length direction of the C-shaped steel 22. , Plugged in from above. Accordingly, when the C-shaped steel 22 to be fixed is placed on the C-shaped steel receiving member 19, the rotation limiting plate 3 and the presser fitting 4 of the C-shaped steel fixing bolt 1 are connected to the lip portions on both sides of the C-shaped steel 22. The inside of the C-shaped steel 22 enters from between 23a and 23b.

  Next, using the groove 5a for rotation operation at the tip of the screw shaft portion of the bolt 2, the bolt 2 is tightened with a screwdriver or the like from the lower side of the C-shaped steel receiving member 19 in the tightening direction (plane Rotate counterclockwise (visually). When the bolt 2 is rotated approximately 90 degrees, as shown in FIG. 1, the length direction of the presser fitting 4 is substantially perpendicular to the length direction of the C-shaped steel 22 to be fixed, and both ends 4a, At the same time, 4b is directed to overlap the both side lip portions 23a, 23b of the C-shaped steel 22, and at the same time, the arcuate tip side edges at the bent end portions 11a, 11b at both ends of the rotation limiting plate 3 slightly longer than the length of the presser fitting 4 12a and 12b contact | abut to the inner surface of the parallel both-sides plate 24a and 24b of the C-shaped steel 22, and the further rotation of the presser metal fitting 4 is prevented. In other words, the lengths of the rotation limiting plate 3 and the presser fitting 4 are set with respect to the interval between the parallel side plates 24a and 24b of the C-shaped steel 22 so as to be in such a state. In this state, the nut 25 is screwed and fastened to the screw shaft portion 5 of the bolt 2, and the C-shaped steel presser portions 16 a and 16 b of both ends 4 a and 4 b of the presser fitting 4 are connected to each other. The C-shaped steel cradle 20 of the shape steel receiving member 19 and the lip portions 23a and 23b on both sides of the C-shaped steel 22 are sandwiched and fixed.

  As described above, the C-shaped steel fixing bolt 1 is used to place the C-shaped steel 22 on the C-shaped steel receiving base 20 of the C-shaped steel receiving member 19, and the lip portions 23a and 23b on both sides thereof. Although it can be fixed in a direction to be supported on the pedestal 20, the bolts 2 are connected to each other because the both ends of the rotation limiting plate 3 are in contact with the inner surfaces of the parallel side plates 24 a and 24 b of the C-shaped steel 22. Centering is performed at the center position between the lip portions 23a and 23b on both sides of the section steel 22, and the overlapping margins of both ends 4a and 4b of the presser fitting 4 with respect to the lip portions 23a and 23b on both sides of the C-section steel 22 are substantially equal. The section steel 22 is stably fixed on the C-shaped steel receiving member 19.

  In the illustrated usage example, the intermediate position of the C-shaped steel 22 disposed horizontally along the wall structure of the building is fixed on the C-shaped steel receiving member 19. The ends of 22 can be fixed on the C-shaped steel receiving member 19, or two C-shaped steels 22 in which the ends are in series with each other on the wide C-shaped steel receiving member 19. Adjacent ends can also be fixed. Further, the end of the C-shaped steel 22 that is abutted at right angles to the column-shaped steel 18 can be fixed on the C-shaped steel receiving member 19. As described above, the C-shaped steel fixing bolt 1 of the present invention has the C-shaped steel 22 placed on the C-shaped steel cradle 20 of the C-shaped steel receiving member 19 and the lip portions 23a on both sides thereof. 23b can be fixed in a direction to be supported on the C-shaped steel cradle 20.

  The C-shaped steel fixing bolt of the present invention has a C-shaped steel on the C-shaped steel pedestal and a lip on both sides when the window frame of a steel structure building is assembled with the C-shaped steel. It can be used as a means of fixing in a direction to be supported on the base.

DESCRIPTION OF SYMBOLS 1 C-shape steel fixing bolt 2 Bolt 3 Rotation limiting plate 4 Presser fitting 4a, 4b Presser fitting both ends 5 Screw shaft part 6 Pan head part 7 Square shaft part 8 Square hole 10a, 10b Tapered arm board part 11a, 11b Bending Ends 12a, 12b Arc-shaped tip side edges 13 Arc-shaped back plate parts 14a, 14b Left and right side plate parts 15 Burring square holes 15a Square cylindrical peripheral walls 16a, 16b C-shaped steel presser parts 17 Caulking parts 18 Column-shaped steel 19 C-shaped steel receiving member 20 C-shaped steel receiving base 21 Bolt hole 22 C-shaped steel to be fixed 23a, 23b Both side lip portions 24a, 24b Parallel both side plates 25 Nut

Claims (3)

  A presser fitting that holds both lip portions of the C-shaped steel from the inside of the C-shaped steel is attached to the bolt in a T-shape inside the head of the bolt at a central position in the length direction, and C In the structural steel fixing bolt, a rotation limiting plate is attached between the bolt head and the presser fitting so as not to be relatively rotatable with respect to the bolt at a central position in the length direction. After inserting into the inside of the C-shaped steel from between the lip parts on both sides of the C-shaped steel, the bolt is rotated in the direction of tightening the nut with respect to the bolt, and the holding metal fittings are attached to both ends of the C-shaped steel. A C-shaped steel fixing bolt configured such that when it is turned in a pressing direction, both ends of the rotation limiting plate are in contact with the inner surfaces of the parallel side plates of the C-shaped steel to restrict further rotation of the bolt.   The bolt has an angular shaft portion formed at an inner end adjacent to the head, and the presser fitting has an arcuate back plate portion that is curved toward the distal end side of the bolt shaft portion at both ends in the length direction. It consists of a press-molded product consisting of left and right side plates integrally connected from both sides of the arc-shaped back plate to the tip end side of the bolt shaft, and a square cylindrical peripheral wall at the center of the arc-shaped back plate Is provided with a burring square hole protruding inward, and the burring square hole of the presser fitting and the square hole of the rotation restricting plate are externally fitted to the angular shaft portion of the bolt. The square cylindrical peripheral wall is press-deformed so as to be in pressure contact with the screw shaft portion following the square shaft portion of the bolt, and the presser fitting and the rotation limiting plate are fixed to the inner side of the bolt head. C-shaped steel fixing bolt as described.   The rotation limiting plate includes a tapered arm plate portion extending in both directions from a central portion fixed to the bolt, and the rotation limiting plate is configured such that both ends of the tapered arm plate portion are against the bolt with respect to both ends of the presser fitting. Attached so as to be shifted to the opposite side to the tightening direction of the nut, both ends of the tapered arm plate portion are formed with arcuate tip side edges that contact the inner surfaces of the parallel side plates of C-shaped steel. The C-shaped steel fixing bolt according to claim 1 or 2.

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