JP5759930B2 - Bonded hardware - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a metal joint used when joining end surfaces of horizontal members such as beams and girders in a T-shape to side surfaces of structural materials such as pillars and torches in various tree structures, and in particular, the joining thereof. The present invention relates to a metal joint that slows down the breakage of horizontal members and structural members as much as possible when an excessive bending moment acts on the part.

  For example, as a conventional joining hardware, for example, a joining hardware that joins a structural material such as a column and a horizontal material such as a beam in a T shape, is inserted into a back plate fixed to the side surface of the structural material and a slit of the horizontal material. Spatial separation of the rear edge fixed by the drift pin and the like, and the back plate and the rear edge are integrated only by a plurality of branch parts, so that the structural material and the horizontal member are separated. When an excessive load is applied to the branch, the branch part is inevitably stressed and causes plastic deformation. By absorbing energy by this plastic deformation, the load acting on the member is relaxed and the joint is destroyed. There has been proposed a metal joint that minimizes the amount of metal (see, for example, Patent Document 1).

JP 2011-214354 A

  However, in the above-described conventional joint hardware, the side plates of the joint hardware are provided with a plurality of branch portions of various shapes extending in the longitudinal direction of the horizontal member, so that the processing takes time and the plurality of branch portions. Is formed in multiple stages in the longitudinal direction of the structural material, and if an excessive bending moment acts on the joint between the horizontal member and the structural material, energy may not be absorbed by plastic deformation. .

  Therefore, the present invention absorbs energy by plastic deformation of the metal fitting itself when not only an excessive load but also an excessive bending moment acts on the joint portion of the horizontal member and the structural member. An object of the present invention is to provide a metal joint that can minimize the destruction of the structural material.

In order to solve the above-mentioned problems, the metal fitting of the present invention is a metal fitting for joining the end face of a horizontal member such as a beam or a girder in a T-shape to the side surface of a structural material such as a column or a trunk. , Contact with the side of the structural material, it is inserted into the back plate fixed to the structural material through the bolt through the bolt hole and the slit processed in the end surface of the horizontal material, and fixed to the horizontal material through the drift pin in the pin hole has a pair of side plates that, the, so that each pin holes in the pair of side plates are not suited to the inside of the pair of side plates, and are inserted into slits which are processed into an end surface of the horizontal member provided recessed below the width of the slit, characterized Rukoto is inserted into the slit.
Here, on the back surface of the back plate sandwiched between the pair of side plates, a back plate reinforcing plate may be provided between the pair of side plates. Here, as the back plate reinforcing plate, a steel plate having the same thickness as the back plate may be used, or a plate made of synthetic resin thicker than the back plate may be used.
It is good to make it.

In the bonding hardware of the present invention, each of the pin holes in the pair of side plates is not suited to the inside of the pair of side plates, and the width of the slit following to be inserted into a slit which is machined to the end surface of the horizontal member It provided recessed in, partially because inserted into the slit, as well as an excessive load to the joint portion of the horizontal member and the structural member, when an excessive bending moment is applied, the recess surrounding the pin hole Bends and plastically breaks. Therefore, the energy of stress acting at the time of the bending moment is absorbed by the plastic deformation of the metal fitting itself, and the breakage of the horizontal member and the structural material can be reduced as much as possible.

(A), (b) is the principal part sectional view in the use condition of the joint metal fitting of an embodiment, respectively, and a top view. (A)-(c) is the front view, right view, and top view of the joining metal fitting of an embodiment, respectively. (A), (b) is the AA sectional view taken on the line in Fig.2 (a), respectively, and the expanded sectional view of B part. It is a figure which shows the example of the plastic deformation of a joining metalware when an excessive moment acts. (A), (b) is a figure which shows the example of the plastic deformation of a pin hole when an excessive moment acts, respectively. (A), (b) is the left view of the state which attached the back plate reinforcement plate which consists of synthetic resins etc. to the back side of a back plate, respectively, CC sectional view.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a metal joint according to the present invention will be described in detail with reference to the accompanying drawings. Note that the embodiment described below is merely an example of the present invention including its dimensions and the like, and the present invention is not limited to the following embodiment, and can be appropriately changed within the scope of the technical idea of the present invention. is there.

  FIGS. 1A and 1B are diagrams showing a usage state of the metal joint 1 according to the embodiment, in which FIG. 1A is a cross-sectional view of a main part and FIG. 1B is a plan view. 2 and 3 are views showing the metal joint 1 according to the embodiment, in which FIG. 2 (a) is a front view, FIG. 2 (b) is a right side view, and FIG. 2 (c) is a plan view. 3 (a) is a cross-sectional view taken along line AA in FIG. 2 (a), and FIG. 3 (b) is an enlarged cross-sectional view of a B portion. As shown in FIG. 1, this metal fitting 1 is for joining the end surface of a horizontal member 3 such as a beam or a girder in a T-shape to the side surface of a structural material 2 such as a column or a trunk. As shown in FIG. 2, a single metal plate is cut and bent, and has a back plate 11 and side plates 12 and 12 on both the left and right sides. Here, the height of the side plates 12 and 12 is about 266 mm, the width is 90 mm, the interval is 43 mm, and the thickness of the metal plate used for the metal joint 1 is, for example, 1.6 mm. The thickness of the metal plate used in the joint metal fitting 1 of the size is half the thickness of 3.2 mm. Therefore, as will be described later, the back plate reinforcing plates 13 and 13 'are attached to the back side of the back plate 11 for reinforcement.

  The back plate 11 is a portion that contacts the side surface of the structural member 2 such as a pillar as shown in FIG. 1 and is fixed to the structural member 2 through the bolt 41 as shown in FIG. A plurality of bolt holes 11a having an inner diameter substantially equal to or slightly larger than the diameter are provided at predetermined intervals. In FIG. 2B, nine bolt holes 11a are provided in the back plate 11, but the number of the bolt holes 11a is arbitrary, and among the nine bolt holes 11a, any bolt hole 11a, For example, every other bolt is used, and, for example, as shown in FIG. Here, as shown in FIG. 1 (b), the back plate 11 is provided with nine bolt holes 13 a similarly to the back plate 11, and has the same thickness as the back plate 11 and the side plates 12, 12. A back plate reinforcing plate 13 made of a steel plate is welded by spot welding or the like. In the present embodiment, the bolt hole 13 a of the back plate reinforcing plate 13 has a slightly larger inner diameter than the bolt hole 11 a of the back plate 11.

  The side plates 12 and 12 are provided on both sides of the back plate 11 as shown in FIGS. 1B and 2C, and are processed on the end surfaces of the horizontal member 3 such as beams and girders, respectively. It is inserted into the slits 31, 31 and is fixed to the horizontal member 3 through the drift pins 5 in the plurality of pin holes 12 a 1 to 12 a 3, respectively. Here, as shown in FIG. 2A, three pin holes 12a1 to 12a3 are provided in the vertical direction at predetermined intervals. Further, a pin receiving groove 12b is provided above the uppermost pin hole 12a1 at the same interval as the pin holes 12a1 to 12a3, and the drift previously fixed to the upper portion of the horizontal member 3 by the pin receiving groove 12b. It is configured to receive pin 5. This is because, before connecting the structural member 2 and the horizontal member 3 via the joint hardware 1, the drift pin 5 is inserted and fixed to the upper portion of the horizontal member 3 in advance. When connecting the frame 3 with the metal fitting 1, the drift pin 5 is positioned and positioned in the pin receiving groove 12 b, and then drifts to the pin holes 12 a 1 to 12 a 3 provided in the side plates 12 and 12, respectively. This is for passing the pin 5. Here, the pin receiving groove 12b and the three pin holes 12a1 to 12a3 are provided so that their centers are substantially the center between the bolt holes 11a in the back plate 11, but in the present invention, they are not necessarily provided in this way. There is no need.

  And, as shown in FIGS. 3A and 3B, the three pin holes 12a1 to 12a3 in the pair of side plates 12 and 12 are directed toward the center between the pair of side plates 12 and 12, for example, It is recessed by extrusion processing such as pressing and embossing.

  In particular, in this embodiment, as shown in FIG. 3B, the pin holes 12a1 to 12a3 in the pair of side plates 12 and 12 are respectively formed by extrusion processing such as pressing and embossing. , 12 are provided with vertical stepped portions 12a11 to 12a31 bent substantially vertically from 12 and stepped flat surfaces 12a12 to 12a32 bent vertically from the vertical stepped portions 12a11 to 12a31 and extending parallel to the side plates 12 and 12, respectively. It is provided on the plane 12b2. The step D1 between the surface of the side plate 12 and the surface of the step plane 12b2 is the thickness of the side plate 12, and is at least 1.6 mm, which is the thickness of the side plate 12. Further, when the diameter of the pin holes 12a1 to 12a3 is 12.5 mm, for example, the diameter of the step plane 12b2 is 20.0 mm on the inner side and 23.0 mm on the outer side. FIG. 3B shows an enlarged cross section of the pin hole 12a3, and the other pin holes 12a1 and 12a2 are similarly configured. In the present invention. It is optional to provide the vertical step portions 12a11 to 12a31 and the step planes 12a12 to 12a32 around the pin holes 12a1 to 12a3. Instead of the vertical step portions 12a11 to 12a31, a tapered step portion is provided and tapered. Step planes 12a12 to 12a32 and pin holes 12a1 to 12a3 may be further provided on the periphery, or the step planes 12a12 to 12a32 may be omitted and pin holes 12a1 to 12a3 may be directly provided on the tapered peripheral edge of the inclined step portion. In short, it is only necessary that the pin holes 12a1 to 12a3 are provided at positions recessed from the surfaces of the side plates 12 and 12.

  Therefore, if the structural material 2 and the horizontal member 3 are shaken by an earthquake or the like and an excessive bending moment exceeding the proof stress (elastic deformation limit) acts on the joint between the structural material 2 and the horizontal member 3, both sides Since the side plates 12 and 12 are made of a thin metal plate having a thickness of 1.6 mm, the metal fitting itself causes plastic deformation in the pair of side plates 12 and 12, and the pin receiving grooves 12b and the pin holes 12a1 to 12a3 It deforms plastically, for example, by expanding grooves and holes. For example, in the case of the pin hole 12a1, it plastically deforms as shown in FIG.

  Specifically, in the pin receiving groove 12b, for example, as shown in FIG. 4, due to an excessive bending moment exceeding the yield strength (elastic deformation limit) at the joint portion between the structural member 2 and the horizontal member 3, The groove is expanded by plastic deformation in a direction of about 30 degrees diagonally to the left with respect to the upper vertical direction.

  On the other hand, in the case of the pin hole 12a1, due to an excessive bending moment, for example, as shown in FIG. 4, the pin hole 12a1 expands in a substantially vertical direction in the figure and is plastically deformed. FIG. 5 is a sectional view showing the state of plastic deformation in the pin hole 12a1, and an excessive bending moment causes the vertical step portion 12a11 and the step plane 12a12 above the pin hole 12a1 to extend downward, while the pin hole 12a1 The lower vertical stepped portion 12a11 and the stepped flat surface 12a12 are plastically deformed by shrinking or the like.

  Further, in the case of the pin hole 12a2 below the pin hole 12a2, the pin hole 12a2 is inclined approximately 30 degrees downward to the left with respect to the vertical direction in the figure due to an excessive bending moment, for example, as shown in FIG. Plastic deformation by spreading. Further, in the case of the lowest pin hole 12a3, due to an excessive bending moment, for example, as shown in FIG. Plastic deformation by spreading.

  As described above, when an excessive bending moment greater than the proof stress (elastic deformation limit) is applied to the joint between the structural member 2 and the horizontal member 3, the side plates 12, 12 themselves in the pair of side plates 12, 12. Causes plastic deformation, and in particular, the pin receiving groove 12b and the pin holes 12a1 to 12a3 are plastically deformed, for example, by expanding the grooves and holes, so that the load applied to the joint portion of the structural member 2 and the horizontal member 3 is reduced. Therefore, the breakage and damage of the joint portion between the structural member 2 and the horizontal member 3 can be reduced as much as possible. The back plate 11 is not deformed as much as the side plates 12 and 12 because the back plate reinforcing plate 13 having the same thickness as the back plate 11 is welded and reinforced by spot welding or the like.

  Further, in this connection fitting 1, when the horizontal member 3 acts on the structural member 2 in the vertical direction or the horizontal direction, and an excessive shearing force acts downward or upward on the joint fitting 1 at a part. The vertical stepped portions 12a11 to 12a31 and the stepped planes 12a12 to 12a32 around the pin holes 12a1 to 12a3 are plastically deformed in the vertical direction or the horizontal direction, so that the joint portion between the structural member 2 and the horizontal member 3 is reduced as little as possible. To do.

  In the description of the above embodiment, the back surface of the back plate 11 sandwiched between the pair of side plates 12, 12 has the same thickness as the back plate 11 and the side plates 12, 12 between the pair of side plates 12, 12. However, the present invention is not limited to this, and the back plate reinforcing plate 13 may be omitted, and the back plate reinforcing plate 13 may be thicker than the back plate 11 and the side plates 12 and 12. A back plate reinforcing plate 13 'made of resin (plastic) or the like may be attached to the back side of the back plate 11 by caulking, an adhesive, or the like.

  FIG. 6 shows a state in which a back plate reinforcing plate 13 ′ made of synthetic resin or the like is attached to the back side of the back plate 11, FIG. 6 (a) is a right side view thereof, and FIG. FIG. As shown in FIGS. 6A and 6B, in order to attach the back plate reinforcing plate 13 ′ to the back side of the back plate 11, the back plate 11 is provided with, for example, a caulking hole 11b, while the back plate is reinforced. The plate 13 ′ is provided with a crimping convex portion 13b ′. Then, after inserting the crimping convex portion 13b ′ into the crimping hole 11b, the crimping convex portion 13b ′ is hit, or the crimping hole 11b is crushed to crimp the convex portion 13b ′. Then, the back plate reinforcing plate 13 ′ is attached to the back side of the back plate 11.

  In the description of the above embodiment, the vertical step portions 12a11 to 12a31 and the step planes 12a12 to 12a32 are provided around the pin holes 12a1 to 12a3, and the pin receiving groove 12b is not provided with the vertical step portion and the step plane. However, in the present invention, not limited to this, a vertical stepped portion and a stepped plane may be provided in the pin receiving groove 12b in the same manner as the pin holes 12a1 to 12a3, and furthermore, the pin holes 12a1 to 12a3 and the pins Of course, the vertical stepped portions 12a11, 12a21 and the stepped planes 12a12, 12a22 may be provided only in the pin holes 12a1, 12a2, for example, in the receiving grooves 12b. In the above embodiment, the vertical step portions 12a11 to 12a31 and the step planes 12a12 to 12a32 have the same size. However, in the present invention, for example, the vertical step portions 12a11 and 12a21 and the step planes of the pin holes 12a1 and 12a2 are used. Of course, it is possible to increase the diameter of only 12a12, 12a22 or only the vertical stepped portion 12a31 and stepped flat surface 12a32 of the pin hole 12a3 so that plastic deformation is likely to occur only in the pin holes 12a1, 12a2 or the pin hole 12a3.

DESCRIPTION OF SYMBOLS 1 Joining metal fitting 11 Back plate 11a Bolt hole 12 Side plate 12a1-12a3 Pin hole 12a11-12a31 Vertical step part 12a12-12a32 Step plane 12b Pin receiving groove 13, 13 'Back plate reinforcement plate 13a, 13a' Bolt hole 2 Structural material 3 Horizontal Construction material 31 Slit 41 Bolt 42 Nut 5 Drift pin

Claims (2)

A joining hardware for joining the end face of a horizontal member such as a beam or a girder in a T-shape to the side surface of a structural material such as a pillar or torso,
A back plate that contacts the side surface of the structural material and is fixed to the structural material through the bolt through the bolt hole;
A pair of side plates that are inserted into slits machined on the end face of the horizontal member and fixed to the horizontal member through the drift pin in the pin hole,
Each of the pin holes in the pair of side plates are not suited to the inside of the pair of side plates, and recessed in width of the slit below provided to be inserted into the slit which is machined to the end surface of the horizontal member , joining fittings, characterized in Rukoto is inserted into the slit. The joint hardware according to claim 1,
A metal joint, wherein a back plate reinforcing plate is provided between the pair of side plates on the back surface of the back plate sandwiched between the pair of side plates.

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