JP2008231712A - Joint metal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint metal which enables a screw to be straightly screwed into the threaded hole of the joint metal. <P>SOLUTION: In this joint metal 1 for being fixed astride at least two connecting members of a building, wrinkled centering guide portions 3 are provided at the inner peripheral edges of the threaded holes 2a and 2b for attaching the screw 6 for fixing the joint metal 1, respectively. The guide portion 3 is protrusively provided in such a tapered shape that a diameter becomes gradually smaller outward from the inner peripheries of the edges of the threaded holes 2a and 2b. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a joint fitting that is joined and fixed across a mutual connecting portion of a wooden building such as a base and a pillar, a column and a beam, a base and a vertical frame.

  Conventionally, as this type of joint metal fitting, for example, as disclosed in Patent Document 1, a through hole through which a fixture fixed to each connecting member is inserted is provided in a metal plate, and the periphery of the through hole is provided. In addition, there is a technique of joining metal fittings in which a recess is provided on the back side so as to have a step with the surface of the metal plate, and a rib for connecting the recesses is provided.

Further, as disclosed in Patent Document 2, a stop plate having nail holes is provided at both ends of a trapezoidal plate, a joining plate protruding from the trapezoidal plate is provided, and the trapezoidal plate is a side surface of the main member. There is a technique for joining a timber building member of a wooden building that has a plurality of nail holes in a part that contacts the side surface and a part that contacts the side surface of the vertical member, and the vertical member includes an engagement groove into which a joining plate fits. To do.
JP 2002-276026 A JP 2004-68306 A

  However, in the related art, since both the through-hole through which the fixing tool of Patent Document 1 is inserted and the nail hole of Patent Document 2 are merely holes, the joint metal fittings that are in contact with each other across the assembling and connecting portions are used. When a fixing tool or a nail is driven into a through-hole or a nail hole, there is a problem in that they cause a center shift and are bent and driven in an oblique direction.

  Therefore, the present invention has been devised in view of the conventional circumstances as described above, and an object of the present invention is to provide a joint metal fitting that can be screwed straight into a screw hole of the joint metal fitting. And

  In order to solve the above-described problems, in the present invention, a joint fitting that is joined to at least two connecting members of a building and is fixed across the joining members to be joined, and the joint fitting is fixed. A center positioning guide portion having a pleat shape is provided at an inner peripheral edge of a screw hole to which a screw for mounting is attached.

  The guide portion protrudes in a tapered shape that gradually decreases in diameter from the inner periphery of the edge portion of the screw hole toward the outside.

  The guide portion is formed by forming slit portions between adjacent folds along the root circumference thereof.

  According to the present invention, the screw can be screwed straight into the screw hole of the joint fitting.

  That is, the present invention is a joint fitting that is joined to at least two connection members of a building and is fixed across the joint members to be joined, and screw holes to which screws for fixing the joint fitting are attached. Since the center positioning guide portion has a crease shape at the inner peripheral edge portion thereof, the crease of the guide portion regulates the center position when the screw is screwed in, so that the screw is screwed straight and straight. be able to.

  Since many joint fittings are used in the field of wooden construction, the screw is screwed in quickly and continuously by an electric screwdriver or the like. Even in such a case, the screw is straightened without causing a center shift in the screw hole of the joint fitting. Can be screwed straight.

  Since the guide portion protrudes in a tapered shape that gradually decreases in diameter from the inner periphery of the edge portion of the screw hole to the outside, it prevents the pointed end portion of the screw that is screwed into the screw hole from shifting laterally. In addition, the leading end portion of the fold of the guide portion can be caused to bite into the connecting member by screwing in the screw, and thereby, the fixing of the joining bracket to the connecting member can be firmly performed.

  Since the guide part is formed with slits along the root circumference of adjacent folds, when the screw is screwed into the screw hole, each fold is easily pressed and connected. The member can be surely digged in, and thereby, the fixing of the joining metal member to the connecting member can be further secured.

The best mode for carrying out the present invention will be described below with reference to the drawings.
As shown in FIG. 1 (a), a joining metal fitting 1 according to the present invention is constituted by a thin plate member having a substantially trapezoidal shape in a plan view made of, for example, stainless steel. 2a and 2b are provided.

  The lower four screw holes 2a in the joining bracket 1 are for fixing to a horizontal member P2 such as a base P1 or a beam, for example, and the upper four screw holes 2b are formed on the pillar Q or the like. It is to be fixed (see FIG. 3).

  Further, as shown in FIGS. 1 (a) and 1 (b), these screw holes 2a and 2b are provided with center positioning guide portions which are creased by processing by a not-shown drilling press or the like. 3 protrudes in a tapered shape that gradually decreases in diameter from the inner periphery of the edge of the screw holes 2a and 2b to the outside.

  That is, when forming the guide portion 3 using a perforating press machine, first, a small circular center hole 4 is formed in the center and the center hole 4 is centered on the outer peripheral direction, for example, at an angular interval of 90 °. Four cutting parts 5 are formed every time, and at the same time, the peripheral fan-shaped part of the center hole 4 is expanded outwardly through these cutting parts 5, so that the guide part 3 is gradually tapered. It is formed in a protruding manner.

Next, an example of use of the best mode configured as described above will be described.
As shown in FIG. 3, the joint fitting 1 is brought into contact with two connecting members such as a base P1 and a pillar Q, or a horizontal member P2 such as a beam and a pillar Q, which are axially assembled to each other. The screws 6 are fixed to the base P1 by screwing the screws 6 into the four screw holes 2a, and are fixed to the column Q by screwing the screws 6 into the upper four screw holes b2.

  When the screws 6 are screwed into the screw holes 2a and 2b, first, as shown in FIG. 2A, the crease tip of the guide portion 3 in the screw holes 2a and 2b of the joint fitting 1 is applied to the connecting member. Then, the screw 6 is screwed into the screw holes 2a and 2b from the opposite side. Incidentally, an electric screwdriver is used for screwing the screw 6.

  At this time, as shown in FIG. 2B, in a state where a part of the tip of the screw 6 is screwed into the connecting member, the tip peripheral surface of the screw 6 is matched with the tapered fold of the guide portion 3. The center positioning is achieved. For this reason, the screw 6 is screwed straight in a state perpendicular to the screw holes 2a and 2b.

  When the screw 6 is completely screwed into the connecting member and the joint fitting 1, the periphery of the screw holes 2a and 2b is pressed to the connecting member side by the head of the screw 6 as shown in FIG. Therefore, the crease tip of the guide part 3 is in a state of being bitten into the connecting member. Thereby, fixation of the joining metal fitting 1 with respect to a connection member will become firm.

  FIG. 4 shows another example of the guide part 3. In this example, the guide part 3 has slits 7 formed along the root circumference between adjacent folds. Yes. As a result, when the screw 6 is screwed into the screw holes 2a and 2b, the folds are easily bent from the root by the pressing of the head of the screw 6 toward the connecting member around the screw holes 2a and 2b. As a result, the crease tip of the guide portion 3 bites into the connecting member with certainty.

  Further, FIG. 5 shows another example of the joining metal fitting 1 according to the present invention. As shown in FIG. 5 (a), the joining metal fitting 1 is composed of two connecting members that are axially assembled to each other. A substantially L-shaped band plate with a slight thickness applied to the right-angled portion is formed, and screw holes 2 a and 2 b are provided at a plurality of locations on the upper and lower sides of the joint fitting 1.

  As shown in FIGS. 5 (a) and 5 (b), these screw holes 2a and 2b have a center positioning guide portion 3 which is formed into a rectangular pleat shape by processing by a not-shown punch press machine or the like. However, the screw holes 2a and 2b are projected in parallel with each other from the inner periphery to the inner side of the edge portion. The center hole 4 having a substantially rectangular shape at the center of each rectangular fold of the guide portion 3 has a center positioning function with respect to the screw 6.

  FIG. 6 shows another example of the guide portion 3. In this example, the guide portions 3 in the screw holes 2a and 2b are formed in triangular ridge shapes adjacent to each other, and the screw hole 2a. 2b protrudes in a taper shape with a diameter decreasing toward the outside from the inner periphery of the edge portion. Thus, when the screw 6 is screwed into the screw holes 2a and 2b, the triangular fold-shaped guide portions 3 are rooted by the pressing of the heads of the screws 6 toward the connecting members near the screw holes 2a and 2b. And bent into the connecting member.

  In addition, the shape of the above-mentioned joining metal fitting 1 corresponding to the use place to the connecting member, the above-described various shapes of the guide portion 3 in the screw holes 2a and 2b, and a combination of both are arbitrary. Of course, only the combination of the two is not intended to limit the present invention. In the present embodiment, the screw 6 is used, but it goes without saying that the screw 6 includes so-called screws, nails and the like. Further, the fold-shaped portion constituting the guide portion 3 for center positioning includes, for example, a plurality of guide plates at the inner peripheral edge portions of the screw holes 2a and 2b, and a small center hole 4 at the center through the plurality of cutting portions 5. Can be formed by holding and extending.

An example of the joining metal fitting in the best form for implementing this invention is shown, (a) is a top view, (b) is a right view. Similarly, the state of use of the joint fitting will be described. (A) is a cross-sectional view of a state before a screw is screwed into the connection member via the screw hole of the joint fitting, and (b) is a connection member via the screw hole of the joint fitting. FIG. 6C is a cross-sectional view of a state in which a part of the tip of the screw is screwed in, and FIG. 5C is a cross-sectional view of a state in which the screw is completely screwed into the connecting member through the screw hole of the joint fitting. It is a perspective view which similarly shows the use condition of a joining metal fitting. The other example of a guide part is similarly shown, (a) is a top view, (b) is a right view. The other example of a joining metal fitting and a guide part is similarly shown, (a) is a perspective view, (b) is XX sectional drawing in the enlarged detailed view shown by the circle of (a). The other example of a guide part is similarly shown, (a) is a top view, (b) is a right view.

Explanation of symbols

P1 Foundation P2 Horizontal member Q Column 1 Joint fitting 2a, 2b Screw hole 3 Guide part 4 Center hole 5 Cutting part 6 Screw 7 Slit part

Claims (3)

  A joint fitting that is joined to at least two connection members of a building and is fixed across the joint members to be joined, and is attached to an inner peripheral edge of a screw hole to which a screw for fixing the joint fitting is attached. A joining bracket comprising a center positioning guide portion having a pleated shape.   The joint fitting according to claim 1, wherein the guide portion protrudes in a tapered shape that gradually decreases in diameter from the inner periphery of the edge portion of the screw hole toward the outside.   The joint fitting according to claim 1, wherein the guide portion is formed by forming slit portions between adjacent folds along a root circumference thereof.

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