JP4438751B2 - Reinforcing hardware and structure of perforated beams - Google Patents

Description

  The present invention relates to a wooden beam reinforcing metal provided with a through hole, and a reinforcing structure using the reinforcing metal.

  In order to insert air conditioning ducts and various pipes / wiring through wooden beams, there are cases in which through holes in the beam width direction are formed. In such a beam (hereinafter referred to as “perforated beam”), since it is necessary to compensate for the decrease in beam strength due to the through hole, a technique for attaching a reinforcing hardware made of a steel plate or the like around the through hole has been proposed. ing.

FIG. 3 shows the reinforcing hardware and the reinforcing structure disclosed in Patent Document 1. The reinforcement metal 9 is applied to one side surface of the perforated beam 1 and is composed of a vertical plate portion 91 that reinforces the periphery of the through hole 11 and a horizontal plate portion 92 that reinforces the lower surface of the perforated beam 1. The vertical plate portion 91 is formed with an opening 93 that substantially matches the through hole 11. The vertical plate portion 91 is fixed to the perforated beam 11 by a large number of screws 94 and nails.
JP 2003-176601 A

  As mentioned above, the reinforcement structure that attaches steel plate reinforcement hardware to the side of the perforated beam with a large number of screws and nails has a slight clearance between the screw insertion hole formed in the steel plate and the screw. When a perforated beam is deformed by an external force, a stress transmission delay occurs in the process of transmitting stress from wood to screws and from screws to steel plates. Further, since the screw insertion hole and the screw are in a contact state close to point contact, there is a possibility that the stress is not sufficiently transmitted.

  Thus, the present invention proposes to propose a reinforcing metal capable of exerting high strength by reliably transmitting stress when the perforated beam is deformed, and a perforated beam reinforcing structure using the reinforcing metal. And

In order to achieve the above-described object, a reinforcing metal for a perforated beam according to the present invention is attached to a side surface of a perforated beam in which a through hole in the beam width direction is formed, and reinforces the periphery of the through hole. A substantially flat reinforcing side plate having an opening corresponding to the through hole, and a plurality of holes formed in the vicinity of the opening of the reinforcing side plate, respectively, and one side and the other side of the reinforcing side plate characterized by comprising a plurality of short cylindrical portion projecting, and a plurality of claw-like protrusion formed on one side the distal end periphery of each of the short tubular portion.

The perforated beam reinforcing structure of the present invention is a perforated beam reinforcing structure in which a reinforcing metal is attached to a side surface of a perforated beam in which a through hole in the beam width direction is formed, and the periphery of the through hole is reinforced. The reinforcing hardware is fixed to a substantially flat reinforcing side plate in which an opening corresponding to the through hole is formed and a plurality of holes formed in the vicinity of the opening of the reinforcing side plate, respectively. A plurality of short tube portions projecting on one side of the tube, and a plurality of claw-like protrusions formed on the peripheral edge of the tip of each short tube portion, and through holes and reinforcements on at least one side surface of the perforated beam The side plate is matched with the opening of the side plate, the reinforcing side plate is applied, the short cylindrical portion is inserted into a counterbore formed on the side surface of the perforated beam, and inserted into a bolt insertion hole formed at the center of the counterbore. By fastening the reinforcing hardware and the perforated beam in the beam width direction via bolts and nuts, Characterized in that bite into the the bottom of the counterbore hole.

The perforated beam reinforcing structure of the present invention is a perforated beam reinforcing structure in which a reinforcing metal is attached to a side surface of a perforated beam in which a through hole in the beam width direction is formed, and the periphery of the through hole is reinforced. The reinforcing hardware is fixed to a substantially flat reinforcing side plate in which an opening corresponding to the through hole is formed, and a plurality of holes formed in the vicinity of the opening of the reinforcing side plate, respectively. a plurality of short cylindrical portion projecting on one side and the other side of, and and a plurality of claw-like protrusion formed on one side the distal end periphery of each of the short cylindrical portion, on at least one side of Yuanahari The through hole and the opening of the reinforcing side plate are matched and the reinforcing side plate is applied, and one side of the short cylindrical portion is inserted into the counterbore formed on the side surface of the perforated beam, and formed at the center of the counterbore hole. via bolts and nuts that are inserted into the bolt insertion holes for fastening the reinforcing hardware and Yuanahari in Ryohaba direction And by, characterized in that bite into the claw-like protrusions on the bottom of the counterbore hole.

  The reinforcing metal and the reinforcing structure of the perforated beam configured as described above are formed by inserting a short cylindrical portion protruding on one side of the reinforcing side plate into a counterbore formed on the side surface of the perforated beam, On the other hand, since it is in a state close to surface contact, it exhibits an excellent stress transmission effect against deformation of the perforated beam.

  In addition, since the claw-like projections formed on the peripheral edge of the tip of the short cylinder part bite into the perforated beam, high rigidity is exhibited even with respect to the initial deformation of the perforated beam.

  Since the strength of the perforated beam can be increased by such an action, it is not necessary to increase the cross-sectional dimension of the perforated beam more than necessary, which contributes to improvement in design freedom and economy.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view showing an outline of a reinforcing hardware and a reinforcing structure of the present invention, and FIG. 2 is a partial sectional view showing a fastening state between the reinforcing hardware and a perforated beam.

  The perforated beam 1 has a rectangular cross section, and a through hole 11 for piping is formed in the width direction. The inner diameter of the through hole 11 assumed in the exemplary embodiment is several tens of centimeters. A reinforcement metal 2 is attached around the through hole 11.

  The reinforcing hardware 2 includes a substantially flat reinforcing side plate 21 made of a steel plate or a stainless steel plate having a thickness of several millimeters. The reinforcing side plate 21 is formed with a substantially U-shaped opening 22 in front view corresponding to the through hole 11. A plurality of (four in the illustrated form) hole portions are formed around the opening 22, and a plurality of hollow portions made of steel are inserted into each hole portion and welded to the reinforcing side plate 21. The short cylinder part 23 of the location is provided. The short cylindrical portion 23 has an outer diameter of about 30 to 50 mm, the tip side, that is, the side applied to the side surface of the perforated beam 1 protrudes from the reinforcing side plate 21 by about 10 to 20 mm, and the opposite rear end side from the reinforcing side plate 21. It is attached to protrude about several mm. Several sharp dowel-like claw-like projections 24 are formed on the peripheral edge of the tip of the short cylindrical portion 23 on the side that is applied to the perforated beam 1.

  When attaching the reinforcing hardware 2 to the side surface of the perforated beam 1, a counterbore hole 12 for inserting the short cylindrical portion 23 into the side surface of the perforated beam 1 in advance, and a bolt penetrating the center in the beam width direction The insertion hole 13 is formed. The depth of the counterbore 12 is approximately the same as the protruding dimension (excluding the claw-like protrusion 24) on the distal end side of the short cylindrical portion 23. Then, the reinforcing hardware 2 is applied to the side surface of the perforated beam 1, and the short cylindrical portion 23 is fitted into the counterbore 12. When the claw-like protrusion 24 is pierced into the bottom surface of the counterbore hole 12 by lightly hitting the short cylinder portion 23 with a hammer or the like, the reinforcing hardware 1 is temporarily fixed. Next, as shown in FIG. 2, the bolt 3 is inserted into the bolt insertion hole 13 from the opposite side surface of the perforated beam 1, and the nut 4 is fastened to the leg end of the bolt 3 exposed from the rear end of the short tube portion 23. Then, the reinforcing hardware 2 and the perforated beam 1 are integrally coupled.

  In the embodiment shown in FIG. 2, in order to prevent the head of the bolt 3 from projecting on the side surface opposite to the perforated beam 1, a flat pulling bolt on the head is adopted. The head of the pulling bolt is housed in a counterbore 14 formed on the side surface on the opposite side. Of course, general hexagon bolts can also be used. Reference numerals 51 and 52 in FIG. 2 are washers.

  According to the reinforcing structure configured in this manner, the claw-like protrusions 24 formed at the peripheral edge of the tip of the short cylinder portion 23 firmly bite into the perforated beam 1 by fastening the bolt 3 and the nut 4. The nail-like protrusions 24 that have digged in quickly exhibit rigidity against initial deformation when the perforated beam 1 receives an external force.

  Further, the short cylindrical portion 23 of the reinforcing metal piece 2 is embedded in a counterbore 12 formed on the side surface of the perforated beam 1, and the outer peripheral surface of the short cylindrical portion 23 and the inner peripheral surface of the counterbore hole 12 are surfaces. Therefore, the stress due to bending deformation or shear deformation of the perforated beam 1 is directly transmitted from the short tube portion 23 to the reinforcing side plate 21. The short cylindrical portion 23 embedded in the counterbore 12 performs the same function as a stud (shear connector) used to integrally connect steel and concrete. The inner diameter of the counterbore hole 12 is preferably a dimension that allows the short tube portion 23 to be fitted and fitted, but even if there is some play between the counterbore hole 12 and the short tube portion 23, the perforated beam 1 When the predetermined amount of deformation occurs, the above-described stress transmission is reliably performed.

  By the way, in the said embodiment, it is comprised so that the rear end of the short cylinder part 23 may protrude several mm from the reinforcement side plate 21. FIG. Although the rear end of the short cylinder part 23 may be formed, for example, so as to be flush with the reinforcing side plate 21, the following advantages are obtained by slightly projecting the rear end from the reinforcing side plate 21.

  First, it is easy to weld the short tube portion 23 and the reinforcing side plate 21. If the short cylindrical portion 23 and the reinforcing side plate 21 are welded from the surface applied to the perforated beam 1, it is preferable because the build-up of the welding becomes an obstacle when the reinforcing side plate 21 is applied to the perforated beam 1. Absent. However, if welding is performed from the opposite side, the weld overlay (reference numeral 6 in FIG. 2) does not interfere with the side surface of the perforated beam 1, so that the entire outer periphery of the short cylindrical portion 23 can be welded sufficiently and reliably. it can.

  Secondly, when the reinforcing metal 2 is applied to the perforated beam 1 and fastened, if the rear end of the short tube portion 23 protrudes, the fastening force of the bolt 3 and nut 4 is directly applied to the short tube portion 23. It is a point that works. Thereby, the nail | claw-shaped processus | protrusion 24 can be made to bite deeply and firmly with respect to the perforated beam 1. FIG.

  The present invention is not limited to the above-described embodiment, and the pair of reinforcing hardware 2 can be applied to both side surfaces of the perforated beam 1 and fastened. As for the form of the reinforcing hardware 2, for example, as in the reinforcing hardware 9 described in Patent Document 1, the opening 22 may be circular instead of U-shaped, or a perforated beam may be formed at the lower edge of the reinforcing side plate 21. A horizontal plate portion that reinforces the lower surface of 1 may be integrally formed into an L shape, or may be formed integrally with a reinforcing tube that is fitted into the through hole 11 of the perforated beam 1.

It is a perspective view which shows the reinforcement metal hardware and reinforcement structure which concern on embodiment of this invention. It is a fragmentary sectional view which shows the fastening state of the reinforcement metal hardware and perforated beam in the said reinforcement structure. It is a perspective view which shows the reinforcement metal hardware and reinforcement structure which concern on the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Perforated beam 11 Through-hole 12 Counterbore hole 13 Bolt insertion hole 2 Reinforcement hardware 21 Reinforcement side plate 22 Opening 23 Short cylinder part 24 Claw-shaped protrusion 3 Bolt 4 Nut

Claims (3)

Reinforced hardware that is attached to the side surface of a perforated beam formed with a through hole in the beam width direction and reinforces the periphery of the through hole,
A substantially flat reinforcing side plate in which an opening corresponding to the through hole is formed;
A plurality of short tube portions respectively fixed to a plurality of holes formed in the vicinity of the opening of the reinforcing side plate and projecting to one side and the other side of the reinforcing side plate;
Reinforcement hardware of Yuanahari, characterized in that it comprises a plurality of claw-like protrusion formed on one side the distal end periphery of each of the short tubular portion. A reinforcing structure for a perforated beam in which a reinforcing metal is attached to a side surface of a perforated beam in which a through hole in the beam width direction is formed, and the periphery of the through hole is reinforced,
The reinforcing hardware is fixed to a substantially flat reinforcing side plate having an opening corresponding to the through hole and a plurality of holes formed in the vicinity of the opening of the reinforcing side plate, and protrudes to one side of the reinforcing side plate. A plurality of short tube portions, and a plurality of claw-like projections formed at the peripheral edge of each short tube portion,
The through hole and the opening of the reinforcing side plate are aligned with at least one side surface of the perforated beam, the reinforcing side plate is applied, and the short cylindrical portion is inserted into a counterbore hole formed on the side surface of the perforated beam. By tightening the reinforcing hardware and the perforated beam in the beam width direction via bolts and nuts that are inserted into the bolt insertion holes formed at the center of the counterbore, the claw-shaped protrusions are bitten into the bottom surface of the counterbore. A reinforcing structure for perforated beams, characterized by that. A reinforcing structure for a perforated beam in which a reinforcing metal is attached to a side surface of a perforated beam in which a through hole in the beam width direction is formed, and the periphery of the through hole is reinforced,
The reinforcing hardware includes a substantially flat reinforcing plate having an opening formed corresponding to the through hole, one side and the other reinforcing plate being secured respectively to a plurality of holes formed in the vicinity of the opening of the reinforcing plate comprising a plurality of short cylindrical portion projecting to the side, and a plurality of claw-like protrusion formed on one side the distal end periphery of each of the short cylindrical portion,
At least one side surface of the perforated beam is fitted with the through hole and the opening of the reinforcing side plate so that the reinforcing side plate is applied, and one side of the short tube portion is inserted into a counterbore formed on the side surface of the perforated beam By tightening the reinforcing metal and the perforated beam in the beam width direction via bolts and nuts inserted through the bolt insertion hole formed at the center of the counterbore hole, the claw-like projections are formed on the bottom surface of the counterbore hole. reinforcing structure Yuanahari characterized in that bite into.

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