JP2013050008A - Fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener capable of facilitating work during construction and meeting the needs of cost reduction, in addition to securement of necessary strength, when H-shaped cross-section wood is attached to another member.SOLUTION: A fastener including a metal fitting 11, fixing means such as a bolt 27, and a pressing nail 21 is used to attach an end surface of an H-shaped cross-section branch member 41 to a side surface of a trunk member 31. The metal fitting 11 comprises a front plate 12 which is brought into contact with the trunk member 31, two side plates 15 for sandwiching the branch member 41, and a base plate 17 for placing a lower flange 42 of the branch member 41. The pressing nail 21 comprises a leading part 22 with a pointed tip, and a step part 23 larger in diameter than the leading part 22. When the pressing nail 21 is driven in from a lateral hole 16 of the side plate 15, the leading part 22 sticks into a web 43 of the branch member 41; a side surface of the step part 23 bites into a top surface of the lower flange 42; the lower flange 42 is sandwiched between the base plate 17 and the step part 23; and the branch member 41 is fastened to the trunk member 31 via the metal fitting 11.

Description

  The present invention relates to a fastener used when attaching an H-section wood to another member.

  For domestic buildings, ensuring earthquake resistance is indispensable, and for wooden buildings, in order to prevent lifting from the ground, the pillars are integrated with the foundation with hole down hardware etc., and the skeleton is further strengthened. Measures such as placing braces between adjacent columns are taken. It is also an effective measure to reduce the weight of the building. In particular, if the upper structure such as the roof is lightened, a great effect can be expected, and a slate roof or a metal roof may be used instead of the conventional tile roof.

  H-section steel has a shape in which two upper and lower flanges are connected by a plate-shaped web, has excellent strength against weight, and is widely used in various large structures. Also in wooden buildings, in order to reduce the weight, wood with an H cross section may be used as a horizontal member or a diagonal member. Such H-section wood is manufactured by separately manufacturing a flange and a web and bonding them together. As a specific product example, there is a TJI joyist manufactured by U.S. Warehauser.

  When attaching the end of a wood with an H cross section to another member, it is difficult to process the conventional joint, and nails and L-shaped metal fittings are used, but this may reduce rigidity. There are techniques proposed in the following patent documents. Patent Document 1 discloses an apparatus for joining an H-section wood to a side surface of a column, and a plate-shaped steel penetration is inserted into the side surface of the column, and an H-section wood is inserted into a steel penetration protruding from the column. Both are integrated with bolts and nuts. Further, Patent Document 2 discloses a connecting tool for joining a wood having an H cross section to a trunk member, and is characterized in that a leaf spring-like tongue piece is provided on a side surface of a hardware in order to prevent loosening. Yes.

Japanese Patent Laid-Open No. 63-261028 JP 2008-127798 A

  In patent document 1, in order to insert the steel penetration which protrudes from the side surface of a pillar, the slit is processed in the edge part center of the wood of H section. The slit extends over the flange and the web, and when the width of the slit is equal to the thickness of the web, the web in the vicinity of the end is completely scraped off, and the strength may be reduced. Moreover, in patent document 2, in order to prevent looseness, the number of parts is large, the operation | work at the time of construction also increases, and the subject remains in terms of cost.

  In order to reduce the weight of the building, many H-section timbers are often continuously arranged as joists that support the floor and talc that support the roof. Therefore, it is preferable to simplify the construction as much as possible and to complete the construction work quickly on the assumption that the joint portion with other members secures the required strength.

  The present invention was developed on the basis of such circumstances, and when attaching H-section wood to other members, the required strength is ensured and the work at the time of construction is easy and meets the demand for cost reduction. The purpose is to provide a fastener that can be used.

  The invention according to claim 1 for solving the above-mentioned problem is a fastener for attaching an end face of a branch member to a side surface of a trunk member, and the branch member is a web of a lower flange and an upper flange arranged in parallel. A metal plate comprising a bottom plate on which the lower flange is placed, a front plate that contacts the side surface of the trunk member, and two side plates that sandwich the side surfaces of both flanges, and the trunk portion. A pressing nail comprising: a fixing means for integrating the material and the metal fitting; a tip portion sharpened at the tip; and a stepped portion located behind the tip portion and projecting outward from the tip portion. The side plate is provided with a lateral hole for inserting the pressing nail, a tip portion of the pressing nail is driven into the web, and a side surface of the stepped portion presses an upper surface of the lower flange. It is a fastener.

  The present invention is for connecting two bar members called a trunk member and a branch member in a T-shape or an L-shape in various tree structures, and the end face of the branch member is abutted against the side surface of the trunk member. The branch member is assumed to have an H cross section in which two flanges are arranged in parallel apart from each other in the vertical direction and the flanges are connected by a web. On the other hand, the trunk member is a member for supporting the branch member and has a rectangular cross section. In addition, description about a branch member is based on the attitude | position with which the two flanges arranged up and down and the web stood upright.

  The metal fitting closes the bottom between the front plate that is in close contact with the side surface of the trunk member, the two side plates that project at right angles from both ends of the front plate, and sandwich the side surfaces of the upper and lower flanges of the branch member. It has a box shape consisting of a bottom plate and has a height equivalent to that of the branch member. By inserting the end of the branch member into the metal fitting, the branch member is supported by the bottom plate, and further, the lateral displacement and collapse of the branch member are prevented by the side plate. In addition, the front plate may be a simple flat surface, but it is also possible to prevent a displacement between the trunk member and the metal fitting by providing a tenon, a protrusion or the like that fits into the trunk member.

  The fixing means is for integrating the metal fitting with the trunk member, and specifically includes bolts and screw nails. When using a bolt, a hole is provided in the front plate and a hole penetrating the side surface of the trunk member is processed, the bolt is inserted from one side, and a nut is screwed to the tip to tighten. Also in the case of using screw nails, a hole is provided in the front plate and screwed from there toward the trunk member.

  The pressing nail is for integrating the branch member with the metal fitting, and is driven from the side plate of the metal fitting toward the branch member. The pressure nail is composed of a tip portion and a step portion having different thicknesses, and the tip portion is a portion that becomes the tip side when driven, and is a long and narrow bar shape in which only the tip is wedged. Further, the step portion is a portion located behind the front portion and has a larger cross section than the front portion, and the side surface projects outward from the front portion. However, it is not necessary for the entire cross section to project outward, and a part of the cross section may be flush with the tip.

  A disc-shaped head is provided at the rear end of the stepped portion for hitting, like a general-purpose nail. A side hole is provided in the side plate of the metal fitting in order to insert the pressing nail. The horizontal holes need to be provided on both of the two side plates, and a plurality of side holes may be provided on one side plate.

  The pressing nail is driven so as to slide the upper surface of the lower flange of the two flanges of the branch member. Further, the lengths of the front portion and the step portion are adjusted so that the step portion reaches the upper surface of the lower flange after the front portion has pierced the web. Thus, when the pressing nail is driven, the side surface of the stepped portion presses the upper surface of the lower flange, and the lower flange is sandwiched between the pressing nail and the lower plate. In addition, the stepped portion bites into the lower flange, so that the branch member is firmly integrated with the metal fitting. In order to obtain such an effect, the lateral hole into which the pressing nail is inserted is provided at substantially the same height as the upper surface of the lower flange.

  As in the first aspect of the invention, in order to attach the branch member having the H cross section to the trunk member, a fastener including a metal fitting, a fixing means, and a press nail is used. By providing the step portion of the cross section, the side surface of the step portion bites into the lower flange of the branch member, and the branch member can be firmly integrated with the metal fitting. Therefore, the branch member can be fixed to the trunk member without loosening, and the strength of the fastening portion is excellent. In addition, it is not necessary to process a slit or the like on the branch member, so that labor during lumbering can be reduced and strength reduction due to a cross-sectional defect can be prevented.

  At the time of construction, the bracket can be attached to the trunk using fixing means such as bolts, and then the branch can be attached simply by driving a few push nails into the bracket. Can be linked. Therefore, if the present invention is used to install H-section wood for joist and talc, which are frequently used, installation work can be completed quickly, cost can be reduced, and building weight can be reduced. The improvement of earthquake resistance can be expected by making it easier.

It is a perspective view which shows the structure of the fastener by this invention. It is a perspective view which shows the process in which a branch member is attached using the fastener of FIG. It is a perspective view which shows the process in which a pressing nail is driven in order. FIG. 4 is a cross-sectional view depicting the process of FIG. 3. The example of a shape of a pressure nail and its use condition are shown.

  FIG. 1 shows a configuration of a fastener according to the present invention. The fastener shown in this figure has a T-shaped fastening portion by abutting the end face of a branch member 41 having an H cross section against a side surface of a trunk member 31 having a rectangular cross section in a wooden structure. 41 is supported by the trunk member 31. Although the branch member 41 has an H cross section, in this drawing, the posture is such that H is turned sideways, the lower flange 42 and the upper flange 44 are arranged vertically, and a plate-like web 43 is connected to the center of both the flanges 42, 44. Yes. Both the flanges 42 and 44 have the same width and thickness, and both ends of the web 43 are integrated with the flanges 42 and 44 by bonding.

  The metal fitting 11 interposed between the trunk member 31 and the branch member 41 has a box shape with an open top, a front plate 12 that contacts the side surface of the trunk member 31, two side plates 15 that sandwich the branch member 41, The bottom plate 17 on which the branch member 41 is placed is integrated with the trunk member 31 and the branch member 41, and the entire load acting on the branch member 41 is transmitted to the trunk member 31. The distance between the two side plates 15 is the same as the widths of both flanges 42 and 44, so that the branch member 41 can be sandwiched without any gap, and the bottom plate 17 completely closes the gap between the two side plates 15. In addition, the metal fitting 11 secures a height that can accommodate the entire branch member 41.

  The trunk member 31 and the metal fitting 11 are integrated by a fixing means. The fixing means can be freely selected, but in this figure, two bolts 27 are used in the upper and lower sides, inserted into the trunk member 31 from the metal fitting 11, and a nut 28 is screwed to the tip thereof. In order to prevent the head of the bolt 27 from interfering with the branch member 41, the front plate 12 of the metal fitting 11 is formed with a columnar protrusion 13 that houses the head of the bolt 27 therein. Further, an inner hole 14 is formed in the center of the ridge 13 so as to allow the shaft portion of the bolt 27 to pass therethrough.

  In order to insert the tenon 13, a side hole 33 is machined into a side hole 33, and a lower hole 34 is machined into the back to insert the shaft portion of the bolt 27. Further, a counterbore hole 35 is machined on the opposite side of the relief hole 33 to accommodate the nut 28. Thus, by fitting the tenon 13 and the tenon hole 33, the metal fitting 11 can be accurately positioned, and a vertical load and a shear load can be reliably transmitted. A washer 29 is incorporated at the end of the nut 28 in order to prevent the counterbore hole 35 from aging.

  If the load acting on the branch member 41 is relatively light, a simpler screw nail can be used as the fixing means instead of the bolt 27. In that case, the side wall 13 is unnecessary, and only the inner hole 14 for inserting the screw nail is formed in the front plate 12. However, the inner hole 14 is provided between the flanges 42 and 44 so that the head of the screw nail does not interfere with the branch member 41.

  The pressing nail 21 is used to integrate the metal fitting 11 and the branch member 41. The pressing nail 21 includes a long and narrow cylindrical front portion 22, a stepped portion 23 having an enlarged transverse cross section at the rear thereof, and a head 24 at the rear end. Unlike a general-purpose flat-headed nail or the like, The cross-sectional shape is different. The tip of the tip portion 22 has a sharp wedge shape, the tip portion 22 and the stepped portion 23 are concentric, and the boundary is tapered.

  In order to insert the pressing nail 21, a lateral hole 16 is formed in the side plate 15 of the metal fitting 11. The lateral hole 16 is located at substantially the same height as the upper surface of the lower flange 42 in a state where the branch member 41 is inserted into the metal fitting 11. Further, the horizontal hole 16 is required to be at least one place on each of the left and right side plates 15 in order to secure the balance, and in order to prevent interference between the tips of the pressure nails 21, The position with respect to is changed.

  When driving the pressing nail 21, first the front portion 22 is inserted into the lateral hole 16, and the upper surface of the lower flange 42 is slid to pierce the web 43. Next, the head 24 is hit, and the side surface of the step portion 23 having a large cross-sectional diameter is bitten into the upper surface of the lower flange 42. Accordingly, the lower flange 42 is sandwiched between the bottom plate 17 and the pressing nail 21, and the branch member 41 is integrated with the metal fitting 11, so that a tensile load acting on the branch member 41 can be received.

  FIG. 2 shows a process of attaching the branch member 41 using the fastener of FIG. First, the front plate 12 of the metal fitting 11 is brought into contact with the side surface of the trunk member 31, and then a bolt 27 is inserted from the metal fitting 11 toward the trunk member 31, and a nut 28 is screwed to the tip thereof. When the bolt 27 and the nut 28 are tightened, the metal fitting 11 is integrated with the side surface of the trunk member 31. Next, after inserting the end portion of the branch member 41 into the metal fitting 11 and bringing the end surface into contact with the front plate 12, the pressing nail 21 is inserted into the lateral hole 16, and the tip is driven into the web 43.

  FIG. 3 shows the process of driving the pressing nail 21 in order from the upper left. The metal fitting 11 is drawn by cutting along a line passing through the center of the horizontal hole 16. When the distal end of the pressing nail 21 is inserted into the horizontal hole 16, the distal portion 22 advances so as to slide on the upper surface of the lower flange 42, and the distal end pierces the web 43 eventually. Thereafter, when the head portion 24 is hit with a kanachi or the like, the front portion 22 pierces the web 43, and the step portion 23 passes through the lateral hole 16 and reaches the upper surface of the lower flange 42. The step portion 23 has a larger diameter than the tip portion 22, and upward movement is restricted by the lateral hole 16. Therefore, the side surface of the stepped portion 23 bites into the upper surface of the lower flange 42, and the lower flange 42 is sandwiched between the metal fitting 11 and the pressing nail 21.

  FIG. 4 shows the process of FIG. 3 in cross section. The height from the upper surface of the lower flange 42 to the top of the lateral hole 16 is slightly smaller than the diameter of the step portion 23. Therefore, when the pressing nail 21 is inserted into the horizontal hole 16, the distal portion 22 passes through the horizontal hole 16 without difficulty and pierces the web 43. At this time, the stepped portion 23 does not reach the horizontal hole 16, but when the head 24 is hit, the stepped portion 23 eventually reaches the horizontal hole 16. The step portion 23 is restricted from moving upward by the lateral hole 16, and the side surface of the step portion 23 inevitably bites into the lower flange 42, and the branch member 41 and the metal fitting 11 are firmly integrated. When the pressing nail 21 is driven completely, the front portion 22 almost penetrates the web 43 and the head portion 24 is in close contact with the side plate 15.

  As described above, the present invention is characterized in that the stepped portion 23 of the pressing nail 21 bites into the upper surface of the lower flange 42. Therefore, at the time of driving, the shape of each part is set so that the stepped portion 23 reaches the lateral hole 16 after the tip of the pressing nail 21 has pierced the web 43 and further the stepped portion 23 bites into the upper surface of the lower flange 42. It needs to be adjusted. In order to securely attach the branch member 41, the pressing nail 21 is inserted from the left and right, and the lateral hole 16 has a strength that can withstand the reaction force from the pressing nail 21.

  FIG. 5 shows an example of the shape of the pressing nail 21. The pressing nail 21 has a simple circular cross section as shown in FIG. 1 and the like, but the whole can also have a rectangular cross section as shown in this figure. The front portion 22 of the pressing nail 21 in this figure has a wide rectangular cross section and has a wedge shape only at the tip. Further, the step portion 23 has a configuration in which only the upper surface side is projected, and the lower surface side is flush with the front portion 22. Even when the pressing nail 21 has such a shape, it is possible to fix the branch member 41 to the metal fitting 11 by adjusting the position and size of the lateral hole 16 to cause the stepped portion 23 to bite into the lower flange 42. it can.

DESCRIPTION OF SYMBOLS 11 Metal plate 12 Front plate 13 Hozo 14 Middle hole 15 Side plate 16 Side hole 17 Bottom plate 21 Pressing nail 22 Front part 23 Step part 24 Head part 27 Bolt (fixing means)
28 Nut 29 Washer 31 Trunk member 33 Side hole 34 Lower hole 35 Counterbore hole 41 Branch member 42 Lower flange 43 Web 44 Upper flange

Claims (1)

A fastener for attaching the end surface of the branch member (41) to the side surface of the trunk member (31),
The branch member (41) has an H cross section in which a lower flange (42) and an upper flange (44) arranged in parallel are integrated by a web (43),
A bottom plate (17) on which the lower flange (42) is placed, a front plate (12) that contacts the side surface of the trunk member (31), and two side plates that sandwich the side surfaces of both flanges (42, 44) (15) and a metal fitting (11) comprising:
Fixing means (27) for integrating the trunk member (31) and the metal fitting (11);
A pressing nail (21) comprising a tip portion (22) having a pointed tip and a step portion (23) located behind the tip portion (22) and projecting outward from the tip portion (22); ,
With
The side plate (15) is provided with a lateral hole (16) for inserting the pressing nail (21),
Fasteners characterized in that the front portion (22) of the pressing nail (21) is driven into the web (43) and the side surface of the stepped portion (23) presses the upper surface of the lower flange (42).

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