JP6678009B2 - Manufacturing method of metal joint and metal joint - Google Patents

Description

  The present invention relates to a method of manufacturing a metal joint used for joining an end surface of a horizontal member such as a beam or a girder to a side surface of a structural material such as a pillar or a trunk in various wooden structures, and a metal joint.

As a conventional metal fitting used when joining an end face of a lateral member such as a beam or a girder to a side surface of a structural material such as a pillar or a body insert, for example, a bolt is passed through a bolt hole in contact with a side surface of a structural material. A joint fitting having a back plate fixed to the member and a pair of side plates that are inserted into slits formed in the end surface of the member and are fixed to the member through drift pins in a plurality of pin holes, respectively, has been proposed. ing.
In such joining metal fittings, at the upper and lower ends of the back plate, each has the same width as the back surface of the back plate, and is bent inward with respect to the back plate. There has been proposed a device provided with a side plate spacing plate (referred to as a back plate side tongue piece in Patent Literature 2) which is in contact with the inner side surface (for example, see Patent Literatures 1 and 2).

JP 2014-66033 A JP 2013-234512 A

  However, in the metal joints of Patent Documents 1 and 2, the upper and lower ends of the back plate are bent at substantially 90 degrees to provide a side plate space holding plate (in Patent Document 2, a back plate side tongue piece). When the upper and lower ends of the back plate are bent to an angle of less than 90 degrees, both ends of the side plate spacing plate do not contact the inner surfaces of the pair of side plates. Therefore, there is a problem that it cannot be inserted into the slit formed in the horizontal member.

  Also, even if the upper and lower ends of the back plate are bent at substantially 90 degrees to provide the side plate spacing plates, both ends of the side plate spacing plates and the inner surfaces of the pair of side plates are joined by welding or the like. Therefore, if there is a gap between them, the interval between the pair of side plates is not constant, and it cannot be inserted into the slit formed in the horizontal member.

  Therefore, the present invention has been made in view of such a problem, and the distance between the pair of side plates is surely constant, and the pair of side plates is always smoothly inserted into the slit formed in the horizontal member. It is an object of the present invention to provide a method of manufacturing a metal joint, which can improve workability, and a metal joint.

In order to solve the above-mentioned problems, a method of manufacturing a metal joint according to the present invention includes a back plate that is in contact with a side surface of a structural material such as a pillar or a trunk and is fixed to the structural material through a bolt hole and a bolt, and a beam or a girder. In a method for manufacturing a metal joint having a pair of side plates that are inserted into slits machined on the end face of the horizontal member such as a through hole and are fixed to the horizontal member through the respective drift pins in the pin holes, the steel plate is unfolded. Punched or cut into a state, a back plate portion serving as the back plate, a side plate portion continuing to the left and right sides of the back plate portion and serving as the pair of side plates, and upper and lower ends of the back plate portion and the side plate portion And a reinforcing plate portion provided so as to protrude vertically from both upper and lower ends on the side of the back plate portion at the upper and lower ends of the back plate portion, and a lower hole of the bolt hole is formed in the back plate portion, The side plate part is Blank material manufacturing step of manufacturing a blank material having a pilot hole formed therein, and a pressing step of extruding and bending the peripheral hole of the bolt hole and the peripheral hole of the pin hole in the blank material by pressing. And, the blank material is installed in a mold having a concave portion corresponding to the outer shape of the back plate so that the back plate portion of the blank material is located above the concave portion, and thereafter, the inner shape of the back plate is formed. By a drawing process in which the back plate portion of the blank material placed above the recess is pressed by a punch having a corresponding pressing surface, the back plate portion of the blank material becomes the back plate and the side plate portion thereof Are a pair of opposing side plates bent at right angles to the left and right sides of the back plate, and the reinforcing plate portions are bent at substantially right angles from the upper and lower sides of the back plate to stand up, Includes left and right sides are the pair of drawing steps the reinforcing plate connected to the side plates, and in the blank production process, between the back plate portion and the side plate portion and the reinforcement plate portion in the blank At each corner portion where each boundary line intersects, a notch portion is provided, and in the drawing process, the notch portion is formed by the drawing process so that the notch portion is formed by the back plate, the side plate, and the reinforcing plate of the metal joint. It is characterized in that it is a cutout at each corner where the respective boundary lines intersect .
Here, in the pressing step, the hole peripheral portion of the pin hole is formed so as to protrude outward in accordance with the width of the slit formed in the end surface of the horizontal member, and is different from the pin hole in each of the side plates. It is further preferable that a dowel projecting at a position substantially equal to the projecting height of the peripheral edge of the pin hole is formed at the location.
Further, in the pressing step, the bolt hole of the back plate is formed in advance by forming a pilot hole of the bolt hole in the back plate portion, and then extruding a hole peripheral portion of the pilot hole from the outside to the inside to inward. It is preferable to perform the embossing process to protrude, and to perform the burring process in which the hole peripheral portion of the prepared hole protruded inward by the embossing process is pushed back from the inside to the outside.
Further, it is more preferable to provide a rotation stopper on the back plate.
In addition, the metal joint according to the present invention includes a back plate that comes into contact with a side surface of a structural material such as a pillar or a trunk, is fixed to the structural material by being bolted through a bolt hole, and a horizontal member such as a beam or a girder. And a pair of side plates that are inserted into slits machined on the end surface of the back plate and that are fixed to the transverse member through which drift pins are respectively passed through pin holes, and both end portions of the back plate and the pair of side plates. Between the end portion of the side plate on the side of the back plate, a reinforcing plate integrally formed with the back plate and the pair of side plates is provided, and the back plate, the side plate, and the reinforcing plate A notch is provided at each corner where each boundary line intersects .

In the method for manufacturing a metal joint according to the present invention, in a mold having a concave portion corresponding to the outer shape of the back plate, the blank material is installed such that the back plate portion of the blank material is located above the concave portion, By performing a drawing process of pressing the back plate portion of the blank material placed above the recess by a punch having a pressing surface corresponding to the inner shape of the blank, the back plate portion of the blank material becomes a back plate and the side plate thereof A pair of opposite side plates that are bent at right angles to the left and right sides of the back plate, and the reinforcing plate portion is bent at almost right angles from the upper and lower sides of the back plate and rises, and the left and right sides are connected to the pair of side plates. It becomes a board.
Therefore, since the reinforcing plate is integrally formed with the back plate and the pair of side plates by drawing, it is possible to suppress the deformation of the entire joint metal part, improve the proof stress, and improve the dimensional accuracy of the entire joint metal part. improves.
As a result, the interval between the pair of side plates is reliably constant, so that the pair of side plates can always be smoothly inserted into the slit formed in the horizontal member, and the workability can be improved.
Further, the metal joint according to the present invention is provided with a reinforcing plate integrally formed with the back plate and the pair of side plates, respectively, between both ends of the back plate and ends of the pair of side plates on the back plate side. Therefore, the distance between the pair of side plates is reliably constant, and the pair of side plates can always be smoothly inserted into the slit formed in the horizontal member, so that the workability can be improved.

FIG. 2 is a partial cross-sectional side view showing a usage state of the metal joint according to the first embodiment of the present invention. (A) to (c) are plan views showing a use state of the metal joint according to the first embodiment of the present invention, an enlarged sectional view around a pin hole in FIG. 2 (a), and a vicinity of a dowel in FIG. 2 (a). It is an expanded sectional view. 1 is a perspective view of a metal joint according to a first embodiment of the present invention. It is a side view of the metal joint of Embodiment 1 concerning the present invention. FIG. 2 is a plan view of a metal joint according to the first embodiment of the present invention. It is a front view of the metal joint of Embodiment 1 concerning the present invention. FIG. 3 is a rear view of the metal joint according to the first embodiment of the present invention. FIG. 5 is a sectional view taken along line AA in FIG. 4. FIG. 5 is a sectional view taken along line BB in FIG. 4. It is CC sectional drawing in FIG. It is a top view of the blank material used as the basis of the joint metal of Embodiment 1 concerning the present invention formed by cutting a steel plate. FIG. 12 is a plan view showing a state in which pin holes, bolt holes, dowels, and the like have been pressed on the blank material shown in FIG. 11. It is a perspective view showing an example of a metallic mold and a punch for manufacturing a metal joint of Embodiment 1 concerning the present invention. FIG. 13 is a perspective view showing a state in which the blank material shown in FIG. 12 is set on a die and a punch for manufacturing the metal joint of the first embodiment according to the present invention. It is a perspective view of the joint hardware of Embodiment 2 concerning the present invention. It is a side view of the joint hardware of Embodiment 2 according to the present invention. It is a partial section side view showing the use condition of the metal joint of Embodiment 2 concerning the present invention. It is a perspective view of the joint hardware of Embodiment 3 concerning the present invention. It is a side view of the joining hardware of Embodiment 3 concerning the present invention. It is a partial section side view showing the use condition of the metal joint of Embodiment 3 concerning the present invention. It is a perspective view of the joint metal of Embodiment 4 concerning the present invention. It is a side view of the joint hardware of Embodiment 4 according to the present invention. It is a partial section side view showing the use condition of the metal joint of Embodiment 4 concerning the present invention.

  Hereinafter, a method for manufacturing a metal joint according to the present invention and embodiments 1 to 4 of a metal joint manufactured by the manufacturing method will be described in detail with reference to the accompanying drawings. Embodiments 1 to 4 described below are merely examples of the present invention, and the present invention is not limited to the following embodiments 1 to 4, and may be appropriately changed within the scope of the technical idea of the present invention. It is possible.

Embodiment 1 FIG.
As shown in FIGS. 1 and 2, a metal joint 1 </ b> A according to the first embodiment is for joining an end surface of a lateral member 3 such as a beam or a girder to a side surface of a structural member 2 such as a column or a body. As shown in FIGS. 3 to 10, a back plate 11A, a pair of left and right side plates 12A, 12A, and a pair of upper and lower reinforcements integrally formed and connected to the back plate 11A and the pair of side plates 12A, 12A by drawing described later. It has plates 13A and 13A.

<Configuration of back plate 11A>
The back plate 11A is a portion fixed to the side surface of the structural material 2 such as a pillar, and has a plurality (for example, three in the first embodiment) of bolt holes 11A1 for fixing the structural material 2 through the bolts 4. Is provided.

  Here, the bolt hole 11A1 is formed in advance by forming a pilot hole 11A1 ′ to be the bolt hole 11A1 in the back plate portion 11A ′ of the blank material 1A ′ punched or cut from a steel plate as shown in FIG. As shown in FIG. 12, embossing is performed so that the peripheral edge of the prepared hole 11A1 'is extruded inward from the outside and protrudes inward, and the hole of the prepared hole 11A1' is protruded inward by the embossing. It is formed by performing a burring process in which the periphery is pushed back from the inside toward the outside. The number and the interval of the bolt holes 11A1 are arbitrary.

  In the joint 1A of the first embodiment, for example, as shown in FIG. 1 and the like, a bolt 4 is passed through a central bolt hole 11A1 of three bolt holes 11A1 to be connected to the structural material 2 and a washer or the like. To conclude. However, it goes without saying that the bolts 4 may be fastened to all three bolt holes 11A1.

  The bolt 4 includes a screw portion 4a having a thread formed at the tip as shown in FIG. 1, and a head 4b. On the side opposite to the mounting surface of the joint 1A of the structural material 2 such as a pillar, a counterbore 21 is formed by shaving the periphery of the bolt hole 11A1 and denting it so that the head 4b of the bolt 4 does not project. I have. The sitting part 21 may not be provided.

  The back plate 11A is provided with a pair of rotation stoppers 11A2 and 11A2 by making a triangular cut in a part of the back plate 11A and bending and raising the triangular cut portion. In the present invention, the rotation stoppers 11A2 and 11A2 may be omitted.

<Configuration of side plate 12A>
The side plates 12A, 12A are provided on both left and right sides of the back plate 11A, and are inserted into slits 31, 31 formed in the end surfaces of the horizontal members 3 such as beams and girders as shown in FIG. Is fixed to the horizontal member 3.

  Therefore, each of the side plates 12A and 12A of the metal joint 1 of the first embodiment is provided with a pin hole 12A1 into which the drift pin 6 is inserted, and a drift previously attached to the horizontal member 3 above the pin hole 12A1. A pin receiving groove 12A2 for receiving the pin 6 is provided. The reason why the pin receiving groove 12A2 is provided is that the drift pin 6 is inserted and fixed in the upper portion of the horizontal member 3 in advance, and the structural member 2 and the horizontal member 3 are connected via the joint hardware 1A. Then, the drift pin 6 fixed to the upper part of the horizontal member 3 is fitted into the pin receiving groove 12A2 and positioned, and then the drift pin 6 is passed through the pin holes 12A1 and 12A1 provided in the side plates 12A and 12A. .

  Here, the pin holes 12A1 and 12A1 of the side plates 12A and 12A respectively correspond to the widths of the slits 31 formed on the end surfaces of the horizontal members 3 by press working described later, that is, outwardly by the same degree as the widths of the slits 31. It is formed to protrude.

  The side plates 12A, 12A have dowels projecting outward in the same manner as the pin holes 12A1, 12A1 in accordance with the width of the slit 31 formed in the end face of the transverse member 3, that is, the same extent as the width of the slit 31. 12A3 and 12A3 are formed.

  Accordingly, even when the width of the slit 31 is larger than the thickness of the side plate 12A of the metal joint 1, the side plate 12A has a pin hole 12A1 and a dowel 12A3 protruding outward by the same degree as the width of the slit 31 respectively. Since it is formed, it is possible to prevent the side plate 12A inserted into the slit 31 from shifting left and right and to prevent the joint hardware 1A from rotating without hindering the insertability of the side plate 12A into the slit 31.

<Method of Manufacturing Joint Metal 1A of Embodiment 1 According to the Present Invention>
Next, a method of manufacturing the metal joint 1A according to the first embodiment of the present invention will be described.
The method of manufacturing the metal joint 1A according to the first embodiment of the present invention can be roughly divided into (1) a blank material manufacturing process, (2) a pressing process of pin holes, bolt holes, dowels, and the like, and (3) a drawing process. It is divided into three steps. Hereinafter, these three steps will be described.

(1) Blank Material Manufacturing Process FIG. 11 is a plan view of a blank material 1A ′ that is a base of the metal joint 1A according to the first embodiment of the present invention formed by cutting a steel plate.

  As shown in FIG. 11, in order to manufacture the metal joint 1A according to the first embodiment of the present invention, first, a steel plate is punched or cut to produce a blank material 1A ′ that is a base of the metal joint 1A. I do.

  The blank material 1A 'punched or cut in the developed state of the joint hardware 1A of the first embodiment is a back plate portion 11A' serving as a back plate 11A, and a pair of side plates 12A, which are continuous on both left and right sides of the back plate portion 11A '. The upper and lower ends of the side plate portions 12A 'and 12A' and the upper and lower ends of the back plate portion 11A 'and the upper and lower ends of the side plate portions 12A' and 12A 'are vertically displaced from the upper and lower ends of the side of the back plate portion 11A'. And reinforcing plate portions 13A ', 13A' to be provided as reinforcing plates 13A.

  A back hole 11A1 'serving as a bolt hole 11A1 is formed in the back plate portion 11A' of the blank 1A ', while a pilot hole 12A1' serving as a pin hole 12A1 is formed in each of the side plate portions 12A 'and 12A'. At the same time, the pin receiving groove 12A2 is formed.

  The upper and lower reinforcing plate portions 13A 'and 13A' of the blank 1A 'can be subjected to a drawing process, which will be described later, of the back plate portion 11A', the side plate portion 12A ', and the reinforcing plate portion 13A', respectively. Are provided with four notched portions 14A ', 14A'. The cutout portion 14A 'becomes the cutout portion 14A of the metal joint 1A.

(2) Pressing process of pin holes, bolt holes, dowels, etc. Next, a blank material 1A 'having a shape as shown in FIG. Execute the pressing process.

  FIG. 12 is a plan view showing a state where a pin hole, a bolt hole, a dowel, and the like have been pressed into the blank 1A 'shown in FIG.

  In other words, in this pressing step, embossing is performed in which the peripheral edge of the prepared hole 11A1 'of the back plate portion 11A' of the blank material 1A 'manufactured as shown in FIG. The bolt hole 11A1 is formed by performing a burring process in which the hole peripheral portion of the prepared hole 11A1 ′ protruded inward by the embossing process is pushed back from the inside to the outside.

  Also, a triangular cut is made in the back plate portion 11A 'of the blank material 1A' to form a pair of rotation stoppers 11A2 and 11A2.

  The pin holes 12A1 and 12A1 of the side plate portions 12A 'and 12A' formed by this pressing process are formed after the metal fitting 1A is completed, as shown in FIG. 2B. The portions are formed by press working so that the portions come into contact with the outer surfaces 31a, 31a of the respective slits 31, 31, respectively. The slit width (groove width) of each slit 31, 31 is formed larger than the thickness of the blank material 1A '.

  Similarly, in this pressing step, after the metal joint 1A is completed, the side plate portion 12A 'is formed with the slits 31 and 31 in the same manner as the pin peripheral portions of the pin holes 12A1 and 12A1 as shown in FIG. Dowels 12A3, 12A3 projecting to the same extent as the pin holes 12A1, 12A1 are formed by pressing to contact the outer side surfaces 31a, 31a.

(3) Drawing Process FIG. 13 is a diagram illustrating an example of a drawing device used in a drawing process when manufacturing the metal joint 1A according to the first embodiment of the present invention.

  As shown in FIG. 13, the drawing device 7 for the metal joint 1 </ b> A according to the first embodiment of the present invention includes a die (die) 71 and a punch 72.

  The mold (die) 71 is provided on the pedestal 71a, and has a concave portion 71b corresponding to the outer shape of the joint metal 1A of the first embodiment. In addition, a positioning concave portion 71c into which a positioning convex portion 72b1 of the punch 72 described later is inserted is formed at the bottom of the concave portion 71b.

  The punch 72 is connected to a press (not shown) and pressed by a press, and a punch provided on the press connector 72a and having an outer shape corresponding to the inner shape of the metal joint 1A of the first embodiment. A positioning projection 72b1 is provided on the distal end surface of the punch 72b for positioning by being inserted into a bolt hole 11A1 formed in a back plate portion 11A 'of the blank material 1A' shown in FIG. ing.

  Next, the back plate portion 11A 'of the blank material 1A' after the press working as shown in FIG. The blank material 1A 'is set on the mold 71 so as to be located above 71b.

  Thereafter, as shown in FIG. 14, the punch portion 72b of the punch 72 is brought into contact with the back plate portion 11A 'of the blank material 1A' above the concave portion 71b and lowered, and the back plate of the blank material 1A ' The part 11A 'is pushed into the recess 71b of the mold 71.

  Then, the side plate portion 12A 'and the reinforcing plate portion 13A' are bent by the mold 71 and the punch 72 with respect to the back plate portion 11A 'of the blank material 1A', and the back plate portion 11A 'becomes the back plate 11A. 12A 'becomes the side plate portion 12A, and the reinforcing plate portion 13A' becomes the reinforcing plate portion 13A, and finally, the metal joint 1A of the first embodiment as shown in FIGS.

  Therefore, in the metal joint 1A of Embodiment 1 and the method of manufacturing the same, the back plate portion 11A 'of the blank 1A' is located above the concave portion 71b of the mold 71 having the concave portion 71b corresponding to the outer shape of the back plate 11A. Then, by performing a drawing process of pressing the back plate portion 11A 'of the blank material 1A' placed above the concave portion 71b by a punch 72 having a pressing surface corresponding to the inner shape of the back plate 11A, The back plate portion 11A 'of the blank material 1A' becomes the back plate 11A, and its side plate portions 12A ', 12A' become a pair of opposing side plates 12A, 12A bent at right angles to the left and right sides of the back plate 11A, The reinforcing plate portion 13A 'is bent at substantially right angles from the upper and lower sides of the back plate 11A and rises, and the left and right sides are connected to the pair of side plates 12A, 12A. It made.

  Therefore, unlike the metal joints described in Patent Documents 1 and 2 described above, the metal joint 1A according to the first embodiment forms the reinforcing plate 13A integrally with the back plate 11A and the pair of side plates 12A, 12A by drawing. The deformation of the entire joint metal part 1A can be suppressed, the proof stress can be improved, and the dimensional accuracy of the entire joint metal part 1A improves.

  As a result, in the metal joint 1A and the method for manufacturing the same according to the first embodiment, the interval between the pair of side plates 12A, 12A is reliably constant, so that the slits 31, in which the pair of side plates 12A, 12A are formed in the horizontal member 3, respectively. 31 can be smoothly inserted at all times, and the workability can be improved.

  Further, according to the metal joint 1A of Embodiment 1 and the manufacturing method thereof, unlike the metal joints described in Patent Documents 1 and 2, the reinforcing plate 13A is integrally formed with the back plate 11A and the pair of side plates 12A, 12A. Since the strength of the whole hardware is improved, the thickness of the steel plate as the material of the metal joint 1A, that is, the thickness of the blank material can be reduced accordingly, and the weight of the metal joint 1A itself can be reduced. In this respect, the workability can be improved also in this respect.

  In addition, in the metal joint 1A and the manufacturing method thereof according to the first embodiment, the notch 14A is provided at each corner of the back plate portion 11A at the stage of the blank material 1A 'before drawing, so the reinforcing plate portion 13A is formed by drawing. When the reinforcing plate 13A is integrally formed by bending the ′ with respect to the back plate portion 11A ′ and the pair of side plate portions 12A ′ and 12A ′, the bending becomes easier than the case where the notch portion 14A is not provided, and the manufacturing becomes easier. The notch 14A serves as a guide hole when the backboard reinforcing plate is inserted. The notch 14A serves as a surplus hole when plating is performed, so that the film thickness tends to be constant and the corrosion resistance is stable.

  Further, in the metal joint 1A of Embodiment 1 and the method of manufacturing the same, the hole peripheral portion of the pin hole 12A1 has slits 31 formed on the end surface of the horizontal member 3 in the state of the blank 1A ′ before drawing. The outer peripheral portion of the pin hole 12A1 is formed so as to protrude outward according to the width of the pin 31 and is different from the pin hole portion 12A1 'in each side plate portion 12A', 12A 'of the blank material 1A' before drawing. Since the dowels 12A3 projecting to the substantially same height as those described above, when the metal joint 1A is completed from the blank material 1A 'by drawing, the thickness of the side plates 12A, 12A is larger than the thickness of the side plates 12A, 12A so that the side plates 12A, 12A can be easily inserted. Even if a clearance is provided in the width of the slits 31 of the frame member 3, rattling and rotation of the side plates 12A, 12A inserted into the slits 31, 31 can be prevented.

  Further, in the metal joint 1A of Embodiment 1 and the method of manufacturing the same, after the pilot hole 11A1 'serving as the bolt hole 11A1 is previously formed in the back plate portion 11A' of the blank material 1A ', the hole periphery of the pilot hole 11A1' is formed. The burring process is performed in which the portion is extruded inward from the outside to the inside to protrude inward, and the hole periphery of the prepared hole 11A1 ′ protruded inward by the embossing is pushed back from the inside to the outside. Since the bolt hole 11A1 is formed by performing the deformation, the deformation of the bolt hole 11A1 can be suppressed, and additionally, the work hardening of the steel plate occurs, and the strength (proof strength) of the back plate 11A of the joint hardware 1A can be improved, and the bolt can be improved. The contact area in the axial direction with the bolt 4 also increases, and the joint strength between the joint hardware 1A and the bolt 4 improves.

  As a result, the strength of the whole hardware is improved, and accordingly, the thickness of the steel plate as the material of the metal joint 1A, that is, the thickness of the blank material 1A 'can be reduced, and the weight of the metal joint 1A itself can be reduced. The workability can be improved also in this regard.

  In addition, in the metal joint 1A and the method of manufacturing the metal joint 1A of the first embodiment, since the rotation stoppers 11A2 and 11A2 are provided on the back plate 11A, the rotation of the metal joint 1A can be effectively prevented by the rotation stoppers 11A2 and 11A2.

Embodiment 2. FIG.
Next, a joint hardware 1B according to a second embodiment of the present invention will be described. The description of the same configuration as that of the metal joint 1 </ b> A of the first embodiment will be omitted, and the description will focus on the parts unique to the second embodiment. The method of manufacturing the metal joint 1B according to the second embodiment is the same as that of the metal joint 1A according to the first embodiment described above, and a description thereof will not be repeated.

  15 is a perspective view of a metal joint 1B according to the second embodiment of the present invention, FIG. 16 is a side view thereof, and FIG. 17 is a partial cross-sectional side view showing a use state thereof.

  As shown in FIGS. 15 to 17, the metal joint 1B of the second embodiment is provided with four bolt holes 11B1 formed on the back plate 11B in the same manner as the bolt holes 11A1 of the metal joint 1A of the first embodiment. A pair of side plates 12B, 12B are provided with two pin holes 12B1 formed in the same manner as the pin holes 12A1 of the joint hardware 1A of the first embodiment.

  Here, as is clear from FIG. 16, the two pin holes 12B1 provided in each of the side plates 12B, 12B have different positions in the longitudinal direction of the horizontal member 3, respectively.

  The other structure and manufacturing method of the metal joint 1B are the same as those of the metal joint 1A of the first embodiment.

  In the metal joint 1B of the second embodiment, as shown in FIG. 17, the bolt 4 is passed through, for example, a washer through each of the four bolt holes 11B1 provided in the back plate 11B. While fixing to the structural member 2 such as a pillar, the horizontal member 3 such as a beam receives the drift pin 6 in the pin receiving groove 12B2 and inserts the drift pin 6 into the two pin holes 12B1. Fix it. Of course, all four bolt holes 11A1 may be fastened through the bolt 4. Alternatively, metal pieces may be arranged on both sides of the column and fixed with bolts 4.

  Therefore, according to the metal joint 1B of the second embodiment and the manufacturing method thereof, similarly to the metal joint 1A of the first embodiment, the reinforcing plate 13B is integrally formed with the back plate 11B and the pair of side plates 12B, 12B by drawing. Therefore, deformation can be suppressed, proof stress can be improved, and dimensional accuracy can be improved.

  As a result, the interval between the pair of side plates 12B, 12B is reliably made constant by the reinforcing plate 13B, so that the pair of side plates 12B, 12B can always be smoothly inserted into the slits 31, 31 formed in the horizontal member 3. It becomes possible and the workability can be improved.

  Further, according to the metal joint 1B of the second embodiment and the method of manufacturing the same, as in the case of the metal joint 1A of the above-described first embodiment, the strength of the metal whole is improved by the reinforcing plate 13B. It is also possible to reduce the thickness of the steel plate, ie, the thickness of the blank material, which can reduce the weight of the metal joint 1B itself. 14B makes manufacturing easier. In addition, since the notch portion 14B becomes a surplus hole when plating is performed, the film thickness tends to be constant, and the corrosion resistance is stable.

  Further, in the metal joint 1B of Embodiment 2 and the method of manufacturing the same, the rattling and rotation of each of the side plates 12B, 12B inserted into the slits 31, 31 can be prevented by projecting outwardly of the two pin holes 12B1 and the dowels 12B3. In both cases, the strength of the side plates 12B, 12B can be improved.

  Further, in the metal joint 1B of the second embodiment and the manufacturing method thereof, similarly to the metal joint 1A of the first embodiment described above, the strength of the back plate 11B and the joint proof strength with the bolt 4 are provided by the embossed and burred bolt holes 11B1. And the strength of the side plates 12B, 12B, due to the pin holes 12B1, 12B1, the strength of the steel plate as the material of the metal joint 1B, that is, the thickness of the blank material, can be reduced. The weight of the hardware 1B itself can be reduced, and also in this respect, the workability can be improved.

  In the metal joint 1B of the second embodiment and its manufacturing method, unlike the metal joint 1A of the first embodiment described above, the back plate 11B is not provided with a pair of rotation stoppers, but the metal joint 1A of the first embodiment is not provided. Similarly, a pair of rotation stoppers 11A2 and 11A2 may be provided on the back plate 11B. This is the same in Embodiments 3 and 4 described later.

Embodiment 3 FIG.
Next, a metal joint 1C according to a third embodiment of the present invention will be described. The description of the same configuration as the metal joint 1A of the first embodiment and the metal joint 1B of the second embodiment will be omitted, and the description will focus on the parts unique to the metal joint 1C of the third embodiment. The method of manufacturing the metal joint 1C according to the third embodiment is the same as that of the metal joint 1A according to the first embodiment, and a description thereof will not be repeated.

  FIG. 18 is a perspective view of a metal joint 1C according to a third embodiment of the present invention, FIG. 19 is a side view thereof, and FIG. 20 is a partial cross-sectional side view showing a use state thereof.

  As shown in FIGS. 18 to 20, the metal joint 1C of the third embodiment has six bolt holes 11C1 formed on the back plate 11C in the same manner as the bolt holes 11A1 of the metal joint 1A of the first embodiment. A pair of side plates 12C, 12C are provided with two pin holes 12C1 and two dowels 12C3 formed in the same manner as the pin holes 12A1 and the dowels 12A3 of the joint hardware 1A of the first embodiment.

  The other configuration and manufacturing method are the same as those of the metal joint 1A of the first embodiment and the metal joint 1B of the second embodiment.

  In the metal joint 1C of the third embodiment, as shown in FIG. 20, the bolt 4 is passed through a washer or the like into each of the three bolt holes 11C1 among the six bolt holes 11C1 provided in the back plate 11C. While fixing to the structural member 2 such as a pillar, the horizontal member 3 such as a beam receives the drift pin 6 in the pin receiving groove 12C2 and inserts the drift pin 6 into the two pin holes 12C1. Fix it. The bolts 4 may be passed through all the six bolt holes 11C1 and fastened. Alternatively, metal pieces may be arranged on both sides of the column and fixed with bolts 4.

  Therefore, according to the metal joint 1C of the third embodiment and the manufacturing method thereof, similarly to the metal joint 1A of the first embodiment and the metal joint 1B of the second embodiment, the reinforcing plate 13C is formed by drawing and forming the back plate 11C and the pair of metal plates. Since it is integrally formed with the side plates 12C, 12C, deformation can be suppressed, proof stress can be improved, and dimensional accuracy can be improved.

  As a result, the interval between the pair of side plates 12C, 12C is reliably made constant by the reinforcing plate 13C, so that the pair of side plates 12C, 12C can be always smoothly inserted into the slits 31, 31 formed in the horizontal member 3. It becomes possible and the workability can be improved.

  Further, according to the metal joint 1C of the third embodiment and the manufacturing method thereof, similarly to the metal joint 1A of the first embodiment and the metal joint 1B of the second embodiment, the strength of the metal whole is improved by the reinforcing plate 13C. Therefore, the thickness of the steel plate used as the material of the metal joint 1C, that is, the thickness of the blank material can be reduced accordingly, and the weight of the metal joint 1C itself can be reduced, thereby improving workability. And the notch 14C facilitates manufacture. In addition, since the notch portion 14C becomes a surplus hole when plating, the film thickness tends to be constant, and the corrosion resistance is stable.

  Further, in the joint hardware 1C and the method of manufacturing the same according to the third embodiment, the two pin holes 12C1 and the two dowels 12C3 protrude outward to prevent rattling and rotation of the side plates 12C, 12C inserted into the slits 31, 31. The strength of the side plates 12C, 12C can be improved while preventing the side plates 12C.

  Further, in the joint metal 1C of the third embodiment and the manufacturing method thereof, similarly to the joint metal 1A of the first embodiment or the joint metal 1B of the second embodiment, the back plate 11C is formed by the embossed and burred bolt holes 11C1. The strength of the steel plate as the material of the metal joint 1C, that is, the blank material, in addition to the improvement of the strength and the joining strength with the bolt 4 and the improvement of the strength by the two pin holes 12C1 provided in each of the side plates 12C, 12C. Can be made thinner, the weight of the joint hardware 1C itself can be reduced, and also in this respect, the workability can be improved.

Embodiment 4. FIG.
Next, a joint hardware 1D according to a fourth embodiment of the present invention will be described. The description of the same configuration as that of the metal joint 1A and the like of the first embodiment will be omitted, and the description will focus on the parts unique to the metal joint 1D of the fourth embodiment. The method of manufacturing the metal joint 1D according to the fourth embodiment is the same as that of the metal joint 1A according to the first embodiment, and a description thereof will not be repeated.

  FIG. 21 is a perspective view of a metal joint 1D according to a fourth embodiment of the present invention, FIG. 22 is a side view thereof, and FIG. 23 is a partial sectional side view showing a use state thereof.

  As shown in FIGS. 21 to 23, the joint metal 1D of the fourth embodiment has eight bolt holes 11D1 formed on the back plate 11D in the same manner as the bolt holes 11A1 of the joint metal 1A of the first embodiment. A pair of side plates 12D, 12D are provided with three pin holes 12D1 and two dowels 12D3 formed in the same manner as the pin holes 12A1, dowels 12A3, etc. of the joint hardware 1A of the first embodiment.

  The other configuration and manufacturing method are the same as those of the metal joint 1A of the first embodiment.

  Then, in the metal joint 1D of the fourth embodiment, as shown in FIG. 23, among the eight bolt holes 11D1 provided in the back plate 11D, for example, the bolts 4 are respectively inserted into the four bolt holes 11D1 through washers or the like to pass through the pillars. On the other hand, for the horizontal member 3 such as a beam, the drift pin 6 is received in the pin receiving groove 12D2, and the drift pin 6 is inserted and fixed in the three pin holes 12D1. . The bolts 4 may be fastened to all the eight bolt holes 11D1. Alternatively, metal pieces may be arranged on both sides of the column and fixed with bolts 4.

  Therefore, according to the metal joint 1D of the fourth embodiment and the method for manufacturing the same, the metal joint 1D of the first embodiment, the metal joint 1B of the second embodiment, and the metal joint 1C of the third embodiment are reinforced by drawing. Since the plate 13D is integrally formed with the back plate 11D and the pair of side plates 12D, 12D, deformation can be suppressed, proof stress can be improved, and dimensional accuracy can be improved.

  As a result, the interval between the pair of side plates 12D, 12D is reliably made constant by the reinforcing plate 13D, so that the pair of side plates 12D, 12D can always be smoothly inserted into the slits 31, 31 formed in the horizontal member 3. It is possible to improve workability.

  Further, according to the metal joint 1D of the fourth embodiment and the manufacturing method thereof, similarly to the metal joint 1A of the first embodiment, the metal joint 1B of the second embodiment, and the metal joint 1C of the third embodiment, the reinforcing plate 13D is used. Since the strength of the hardware as a whole is improved, the thickness of the steel plate as the material of the metal joint 1D, that is, the thickness of the blank material can be reduced accordingly, and the weight of the metal joint 1D itself can be reduced. Also in this regard, the workability can be improved, and the notch 14D facilitates manufacture. In addition, since the notch portion 14D becomes a surplus hole when plating is performed, the film thickness tends to be constant, and the corrosion resistance is stable.

  Further, in the joint hardware 1D and the method of manufacturing the same according to the fourth embodiment, the three pin holes 12D1 and the two dowels 12D3 protrude outward to prevent rattling and rotation of the side plates 12D, 12D inserted into the slits 31, 31. The strength of the side plates 12D, 12D can be improved while preventing the side plates 12D.

  Further, in the joint metal 1D of the fourth embodiment and the method of manufacturing the same, similarly to the joint metal 1A of the first embodiment to the joint metal 1C of the third embodiment, the back plate 11D is formed by the embossed and burred bolt holes 11D1. The strength and the joint strength with the bolt 4 can be improved, and the strength of the side plates 12D, 12D is improved by the pin holes 12D1, so that the thickness of the steel plate as the material of the metal joint 1D, that is, the thickness of the blank material is also reduced. It is possible to reduce the weight of the metal joint 1D itself, and also in this respect, the workability can be improved.

1A-1D Joining bracket 11A-11D Back plate 11A1-11D1 Bolt hole 11A2 Rotation stop 12A-12D Side plate 12A1-12D1 Pin hole 12A2-12D2 Pin receiving groove 12A3-12D3 Dowel 13A-13D Reinforcement plate 14A-14D Notch 1A ' Material 11A 'Back plate portion 11A1' Prepared hole 12A 'Side plate portion 12A1' Prepared hole 13A 'Reinforcement plate portion 14A' Notched portion 2 Structural material 21 Seating part 3 Horizontal member 31 Slit 4 Bolt 4a Screw part 4b Head 5 Nut 6 Drift pin 7 Drawing device 71 Die
72 Punch

Claims (5)

It is inserted into the back plate that contacts the side surface of the structural material such as a pillar or a trunk, and is fixed to the structural material through bolts in the bolt holes, and the slit formed in the end surface of the horizontal member such as a beam or girder. In a method of manufacturing a metal joint having a pair of side plates fixed to the horizontal member through the drift pin respectively,
A steel plate is punched or cut in the unfolded state of the metal joint, and a back plate portion serving as the back plate, a side plate portion continuous with the left and right sides of the back plate portion and serving as the pair of side plates, A reinforcing plate portion provided vertically extending from upper and lower ends on the back plate portion side at upper and lower ends and upper and lower ends of the side plate portion; Forming a hole, a blank material manufacturing step of manufacturing a blank material in which a side hole of the pin hole is formed,
A pressing step of pressing and bending the pilot hole peripheral portion of the bolt hole and the pilot hole peripheral portion of the pin hole in the blank material,
The blank material is placed in a mold having a concave portion corresponding to the outer shape of the back plate so that the back plate portion of the blank material is located above the concave portion, and then, according to the inner shape of the back plate. By a drawing process in which the back plate portion of the blank material placed above the recess is pressed by a punch having a pressing surface, the back plate portion of the blank material becomes the back plate, and the side plate portion becomes the back plate. The pair of side plates are bent at substantially right angles on the left and right sides of the back plate, and the reinforcing plate portion is bent substantially at right angles from the upper and lower sides of the back plate and rises, and the left and right sides are connected to the pair of side plates. Drawing process to become a reinforcing plate,
With
In the blank material manufacturing process, at each corner portion where each boundary line between the back plate portion, the side plate portion, and the reinforcing plate portion in the blank material, a cutout portion is provided,
In the drawing process, the notch portion is formed as a notch portion at each corner where each boundary line between the back plate, the side plate, and the reinforcing plate of the metal joint intersects by the drawing process. Manufacturing method of a metal joint. The method for manufacturing a metal joint according to claim 1 ,
In the pressing step,
The hole peripheral portion of the pin hole is formed so as to protrude outward according to the width of the slit formed in the end face of the horizontal member, and the hole of the pin hole is provided at a position different from the pin hole in each side plate. A method of manufacturing a metal joint, comprising forming a dowel projecting at substantially the same height as a peripheral edge. The method for manufacturing a metal joint according to claim 1 or 2 ,
In the pressing step,
The bolt hole of the back plate, after forming a pilot hole of the bolt hole in the back plate portion in advance, performing an embossing process to extrude the hole peripheral edge of the pilot hole from the outside to the inside and project inward, A method of manufacturing a metal joint, comprising: performing a burring process in which a hole peripheral portion of a pilot hole protruded inward by embossing is pushed back from inside to outside. In the method for manufacturing a metal joint according to any one of claims 1 to 3 ,
A method of manufacturing a metal joint, wherein a rotation stopper is provided on the back plate. It comes into contact with the side of the structural material, such as a pillar or a frame, and is inserted into the back plate, which is fixed to the structural material by bolts passing through the bolt holes, and the slit formed on the end surface of the horizontal member such as a beam or girder. A metal joint having a pair of side plates fixed to the horizontal member through which the drift pins are passed through the pin holes,
A reinforcing plate integrally formed with the back plate and the pair of side plates is provided between both end portions of the back plate and an end portion on the back plate side of the pair of side plates, respectively .
A metal joint , wherein a notch is provided at each corner where each of the boundary lines between the back plate, the side plate, and the reinforcing plate intersects .

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