JP2007100323A - Rafter fixing hardware and roof truss structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide rafter fixing hardware capable of supporting displacement in the axial direction, the horizontal direction, and the direction of rotation of a rafter effectively to improve shearing yield strength and improving rigidity of a horizontal face of a roof truss effectively. <P>SOLUTION: This rafter fixing hardware for tightly connecting and fixing the rafter 13 arranged along roof pitch with/on a horizontal member 14 for supporting rafter is composed of a first plate part 15 arranged along a side face of the rafter 13, a second plate part 16 provided by bending vertically from a one side part 15a of the first plate part 15 and arranged along an upper face of the horizontal member 14, and a third plate part 17 provided vertically for the first plate part 15 from the other side part 15b being vertical to the one side part 15a of the first plate part 15 and provided with a downward extended part 17a extended vertically and downward more than the second plate part 16 by arranging the downward extended part 17a along a front face of the horizontal member 14. Mounting holes 19 for attaching screws 18 for the rafter 13 and the horizontal member 14 are formed in each plate part 15, 16, 17. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rafter fixing hardware and a roof structure, and in particular, a rafter fixing hardware for tightly fixing a rafter arranged along a roof slope to a horizontal support for supporting rafters such as purlins, purlins, girders, And a hut assembly structure using the rafter fixing hardware.

  Rafters, for example, in wooden houses, are diagonal members that are placed along the roof slope and support the roof base, and in the hut structure that is a frame structure that supports the roof, the purlins installed in the lateral direction perpendicular to the roof slope It is supported by horizontal members such as purlins and girders, and is attached to flow in the direction of the slope of the roof. In addition, rafters contribute to the structural stability of the roof surface, and securing the rafters at the cross-joining part with the horizontal member is important for obtaining high structural stability in the roofing group. .

  On the other hand, as a method for increasing the horizontal rigidity of a building shed, a method of placing a load-bearing reinforcing member such as a fire beam, a fired hardware, and a plywood on the horizontal surface of the hut has been adopted. There are an increasing number of space configurations in which a horizontal plane is not formed in a cabin set, such as a structure in which an aerial part is provided for effective use of the indoor space, or a structure in which a sloped ceiling is provided in consideration of the design of the building. In such a space configuration, the fire struts and the fire metal are exposed, so that it is not appropriate to use them.

Therefore, various devices have been studied to improve the horizontal rigidity of the hut without using fire beams and fire metal fittings. In addition to the general method of increasing the fixing degree of rafters by additionally arranging anti-rollers at the interval part, for example, joints for tilting prevention that were used to prevent the rafters from being blown up with the roof surface due to strong winds A method of forming and using a material in a stronger and easier-to-handle structure has also been developed (for example, see Patent Document 1).
JP 2004-156425 A

  However, in the joint metal fitting described in Patent Document 1, it is impossible to obtain an effective strength at each cross-joined portion of the rafter and the horizontal member in order to impart horizontal plane rigidity to the cabin set in a well-balanced manner. In other words, to improve the shear strength by increasing the degree of fixation to the horizontal members of the rafters and to impart high horizontal plane rigidity to the cabin set, it is necessary to suppress displacement in the axial direction, horizontal direction, and rotational direction of the rafters. It is important, and especially the suppression of displacement in the rotational direction (ripping of the rafters) is an important factor, but according to the joint fitting described in Patent Document 1, it is possible to cope with axial and horizontal forces of the rafters. However, it is not possible to cope with the force in the rotational direction, especially when the fittings are attached to only one side of the rafter at each cross-joint part of the rafter and the horizontal member. It is difficult to impart high horizontal rigidity to the set.

  The present invention has been made by paying attention to such a conventional problem, and can be easily attached to each cross-joined portion of the rafter horizontal member without requiring much trouble, and the rafter shaft. The rafter fixing hardware and the rafter fixing hardware which can effectively improve the horizontal rigidity of the hut assembly by effectively supporting the displacement in the direction, the horizontal direction and the rotation direction and improving the shear strength. The purpose is to provide a cabin structure.

  The present invention is a rafter fixing hardware for tightly fixing a rafter arranged along a roof gradient to a rafter support for a rafter such as purlin, purlin, girder, etc., and arranged along the side of the rafter A first plate portion, a second plate portion that is vertically bent from one side portion of the first plate portion, and is disposed along the upper surface of the horizontal member, and one side portion of the first plate portion And a lower extending portion that extends vertically downward from the second plate portion, the lower extending portion being a horizontal member. A third plate portion disposed along the front surface of the first plate portion, the first plate portion, the second plate portion, and the third plate portion extending downward from the rafter and the horizontal member. Installation for attaching tightening members such as screws and nails There By providing rafters fixing hardware which are respectively formed, is obtained by achieving the above object.

  The rafter fixing hardware of the present invention is preferably formed by bending one metal plate cut into a predetermined shape.

  Further, the rafter fixing hardware according to the present invention has a central portion of one side portion of the first plate portion where the first plate portion and the second plate portion are bent vertically and connected to each other, and is perpendicular to the one side portion. A reinforcing convex part having a substantially triangular cross section in a shape in which intersecting line segments are pushed inward from the outside of the bent corner part to the inside is straddled between the first plate part and the second plate part and inside the bent corner part. It is preferable that the protrusion is provided.

  In addition, the present invention is a shed structure constructed by tightly fixing the rafter to the rafter supporting horizontal member using the rafter fixing hardware according to any one of the above, wherein the rafter and the horizontal strut The first plate portion is disposed along one side surface of the rafter, the second plate portion is disposed along the upper surface of the horizontal member, and the third plate portion With the downwardly extending portion disposed along the front surface of the horizontal member, the rafter is attached to the horizontal member by driving a fastening member into the attachment hole toward the rafter and the horizontal member. The object is achieved by providing a roof structure that is tightly fixed.

  According to the rafter fixing hardware of the present invention or the hut structure using the rafter fixing hardware, it is possible to easily attach the rafter fixing hardware to each cross-joined portion to the horizontal member of the rafter without requiring much trouble. In addition, by effectively supporting the displacement in the axial direction, horizontal direction, and rotational direction of the rafters and improving the shear strength, the horizontal plane rigidity of the cabin can be effectively improved.

  As shown in FIGS. 1 and 2, a rafter fixing hardware 10 according to a preferred embodiment of the present invention is configured such that, for example, a rafter 13 constituting a roof set 12 of a roof 11 of a wooden house building is arranged in a horizontal direction perpendicular to a roof gradient. Displacement of the rafters 13 in the axial, horizontal, and rotational directions when it is arranged along the roof gradient while being supported on the rafters 14a, purlin 14b, girders 14c, etc. Is used by being attached to each cross-joining portion of the rafter 13 and the horizontal member 14 so that the horizontal plane rigidity of the cabin set 12 can be improved in a balanced manner by effectively supporting the shear strength and improving the shear strength. Is. Here, the rafters 13 are diagonal members that are arranged along the roof gradient and to which the roof base is attached. The rafters 13 are supported by the horizontal members 14 in the hut assembly 12 that is a frame structure that supports the roof 11, and the gradient of the roof 11. A plurality of pieces are attached at predetermined intervals in the horizontal direction so as to flow in the direction.

  The rafter fixing hardware 10 of this embodiment is a hardware for tightly fixing the rafters 13 arranged along the roof gradient to the rafter support 14 such as the purlin 14a, the purlin 14b, and the girders 14c. The first plate portion 15 disposed along the side surface of the rafter 13 and the first plate portion 15 is provided by being bent perpendicularly from one side portion 15 a of the first plate portion 15 and disposed along the upper surface of the horizontal member 14. The second plate portion 16 and the other side portion 15b perpendicular to the one side portion 15a of the first plate portion 15 are provided to be bent perpendicularly to the first plate portion 15 and extend vertically downward from the second plate portion 16. And a third plate portion 17 disposed along the front surface of the horizontal member 14, and the first plate portion 15, the second plate portion 16, And the second Below extended portion 17a of the plate portion 17, screws toward the rafters 13 and horizontal members 14, mounting holes 19 for attaching the tie element 18 such as a nail are respectively formed.

  In addition, the rafter fixing hardware 10 of the present embodiment is preferably cut into a predetermined shape so as to have a shape in which the first plate portion 15, the second plate portion 16, and the third plate portion 17 are developed, for example, thick. It is formed by bending one metal plate having a length of about 1 to 5 mm.

  Furthermore, the rafter fixing hardware 10 of the present embodiment has the one side portion at the center portion of the one side portion 15a of the first plate portion 15 where the first plate portion 15 and the second plate portion 16 are bent vertically and continuously provided. Reinforcement convex part 21 provided with the approximately triangular section of the shape where line segment XX (refer to Drawing 3 (e) and (f)) perpendicular to 15a was pushed inward toward the inside from the outside of bending corner part 20, The first plate portion 15 and the second plate portion 16 are provided so as to protrude inside the bent corner portion 20.

  As shown in FIGS. 3A to 3G, the first plate portion 15 is a portion having a rectangular planar shape having a size of about 30 to 150 mm in length and about 30 to 150 mm in width, for example, and its lower side. Is a side portion 15a, and the second plate portion 16 extends from the side portion 15a so as to be bent vertically. In addition, one side is defined as an other side 15b perpendicular to the one side 15a, and the third plate portion 17 extends from the other side 15b by being bent vertically. Further, the first plate portion 15 is provided with attachment holes 19 having a hole diameter of, for example, about 1 to 10 mm, opened at three locations, and a joining corner portion between the one side portion 15a and the other side portion 15b. The corner portion 15c located diagonally is chamfered diagonally.

  The second plate portion 16 is a portion having a rectangular planar shape with a width of about 30 to 150 mm and a protruding length of about 20 to 100 mm, for example, and is bent vertically from one side portion 15 a of the first plate portion 15. Are arranged to protrude. The second plate portion 16 is provided with mounting holes 19 having a hole diameter of about 1 to 10 mm, for example, at three locations, and the corner portions 16a on both sides of the tip are obliquely chamfered. Yes. Furthermore, in the present embodiment, the central portion of the one side portion 15a of the first plate portion 15 that is the bent corner portion 20 between the second plate portion 16 and the first plate portion 15 is located inside the bent corner portion 20. It protrudes and has a substantially triangular cross section, for example, the width along the bent corner 20 at the bottom is about 5 to 100 mm, the protruding length from the bent corner 20 at the bottom is about 4 to 40 mm, and the height is about 10 to 100 mm. A triangular pyramid-shaped reinforcing convex portion 21 having a size of 2 mm is provided so as to straddle the second plate portion 16 and the first plate portion 15.

  The third plate portion 17 has a planar shape in which, for example, the side of the upper half of the vertically long rectangular shape having a base of about 20 to 100 mm and a height of about 60 to 300 mm is an oblique side 17b cut off obliquely. It is a part, and the side part opposite to the oblique side 17 b is provided as a joint side with the other side part 15 b of the first plate part 15 in a state of being bent perpendicular to the first plate part 15. When the third plate portion 17 is bent and joined to the first plate portion 15 via the side opposite to the oblique side 17b, the third plate portion 17 is connected to the second plate portion 16. Are also arranged vertically. Further, a portion below the oblique side 17b of the third plate portion 17 extends vertically downward from the second plate portion 16 to constitute a downward extending portion 17a. Furthermore, the downwardly extending portion 17a of the third plate portion 17 is provided with two mounting holes 19 having a hole diameter of, for example, about 1 to 10 mm, and corner portions 17c on both sides of the lower end are formed. It is beveled diagonally.

  In order to form the hut group 12 by tightly fixing the rafter 13 to the horizontal member 14 using the rafter fixing hardware 10 of the present embodiment having the above-described configuration, each of the rafter 13 and the horizontal member 14 to be tightly connected is formed. As shown in FIG. 1, the first plate portion 15 of the rafter fixing hardware 10 is disposed along one side surface of the rafter 13, and the second plate portion 16 is disposed along the upper surface of the horizontal member 14 at the cross joint portion. In the state where the downwardly extending portion 17a of the third plate portion 17 is arranged along the front surface of the horizontal member 14, the nails and screws are tightly connected to the mounting holes 19 toward the rafter 13 and the horizontal member 14. The rafters 13 are tightly fixed to the horizontal member 14 by driving in and attaching the members 18 respectively. As a result, the rafter 13 and the horizontal member 14 are easily and smoothly tightly fixed at each cross-joined portion, and the rafter 13 and the horizontal member 14 are firmly and stably fastened at each cross-joined portion. A cabin structure will be formed.

  According to the present embodiment, the rafter fixing hardware 10 can be easily attached to the cross-joining portion of the rafter 13 to the horizontal member 14 without much labor, and the rafter 13 has an axial direction and a horizontal direction. Further, by effectively supporting the displacement in the rotation direction and improving the shear strength of the roof 11, the horizontal plane rigidity of the roof set 12 can be effectively improved. That is, according to the present embodiment, the rafter fixing hardware 10 has the first plate portion 15, the second plate portion 16, and the downwardly extending portions 17 a of the third plate portion 17 at each cross-joined portion as described above. It is arranged along one side surface of the rafter 13, the upper surface of the horizontal member 14, and the front surface of the horizontal member 14, and each of the fastening members 18 is driven into the mounting holes 19 toward the rafter 13 and the horizontal member 14. With this simple operation, the rafter 13 and the horizontal member 14 can be tightly fixed firmly without requiring much labor. Further, since the first plate portion 15, the second plate portion 16, and the third plate portion 17 are attached to each surface of the cross-joined portion in a state of being arranged perpendicular to each other, they are integrated in the axial direction, The horizontal displacement and the rotational displacement can be firmly supported, and sufficient strength can be exhibited even when the rafter fixing hardware 10 is attached to only one side of the rafter 13 at each cross-joining portion. It becomes possible.

  Furthermore, according to the present embodiment, the rafter-fixed hardware 10 has the ability to cope with the eaves-end blow-up due to wind pressure, so that it is possible to omit the conventional blow-up-compatible hardware, and the cost and attachment of the hardware. Time and effort can be reduced. Furthermore, by improving the shear strength, it becomes possible to secure a higher degree of design grade and structural grade in the accuracy method, and in particular, a rich space that could not be achieved with conventional roof structures, such as the slope top part. Realization is also easy.

  Further, since the reinforcing convex portion 21 having a triangular cross section is provided so as to protrude inside the bent corner portion 20 across the first plate portion 15 and the second plate portion 16, the displacement of the rafter 13 in the rotational direction is further increased. It becomes possible to support firmly.

  FIG. 4 shows a rafter fixing hardware 22 according to another embodiment of the present invention. The rafter fixing hardware 22 is not chamfered at the corners of the first plate portion 15, the second plate portion 16, and the third plate portion 17, but has substantially the same configuration as the rafter fixing hardware 10 of the above embodiment. ing. The rafter fixing hardware 22 of FIG. 4 is also formed by bending one metal plate, and the portions facing each other so that the second plate portion 16 and the third plate portion 17 intersect perpendicularly are welded or the like. Are joined by. Further, a reinforcing rib 23 is provided on the oblique side 17b cut obliquely of the third plate portion 17 so as to be bent in a band shape outwardly from the third plate portion 17. Reinforced by these, the rafter fixing hardware 22 of FIG. 4 can support the displacement in the axial direction, the horizontal direction, and the rotational direction more firmly. In addition to the shape of the reinforcing rib 23 bent in a band shape outward from the hypotenuse 17b, as shown in FIGS. 5 (a) to 5 (c), the reinforcing rib 23 is bent inwardly in the vertical direction and turned back approximately 180 degrees outward. It can be provided as ribs having various shapes such as a shape and a shape folded back approximately 180 degrees inside.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the rafter fixing hardware can be attached so as to be sandwiched between both sides of the rafter at the cross-junction portion between the rafter and the horizontal member. In this case, a pair of rafter fixing hardware having opposite shapes symmetrical to each other is used. The rafter fixing hardware can also be used on the horizontal plane of the hut set, and the rafter fixing hardware is used for the top of the slope of the hut set where the horizontal plane cannot be taken. Thus, the rigidity of the cabin can be improved. In addition, it is possible to install a fire beam and one side of the rafter fixing hardware on the horizontal plane part of the roof set, and to install a rafter fixing hardware on both sides of the slope top part to obtain a balanced rigid surface. . Even in the case of a roof structure with a full horizontal plane, reaction forces are concentrated on the fired beams that are partially used in the corners, etc., and there may be problems such as destruction of the beams. By attaching the rafter fixing hardware to each cross-joining portion between the frame and the horizontal member, the reaction force is distributed in a well-balanced manner, and the destruction of the structure can be effectively avoided. Furthermore, the rafter fixing hardware of the present invention can also be used in a storehouse.

It is explanatory drawing which shows the hut set to which a rafter is fixed using the rafter fixed hardware which concerns on preferable one Embodiment of this invention with the attachment condition of the rafter fixed hardware in the cross-joining part of a rafter and a horizontal member. 1 is a perspective view of a rafter fixing hardware according to a preferred embodiment of the present invention. (A) is a left side view, (b) is a front view, (c) is a right side view, (d) is a plan view, and (e) is a bottom view of a rafter fixing hardware according to a preferred embodiment of the present invention. (F) is a rear view, (g) is sectional drawing along AA of (a). It is a perspective view of the rafter fixed metal fitting concerning other desirable embodiments of the present invention. (A)-(c) is a fragmentary perspective view which illustrates the other shape of a reinforcement rib.

Explanation of symbols

10, 22 Rafter fixed hardware 11 Roof 12 Hut group 13 Rafter 14 Horizontal support 15 for rafter support First plate portion 15a One side portion 15b of first plate portion Second side portion 16 of first plate portion Second plate portion 17 3 plate part 17a The downward extending part 18 of the 3rd plate part Tightening member 19 Mounting hole 20 Bending corner part 21 Reinforcement convex part 23 Reinforcement rib XX Line segment which intersects perpendicularly with one side part of the 1st plate part

Claims (4)

A rafter fixing hardware for tightly fixing a rafter arranged along a roof gradient to a supporting member for supporting a rafter such as purlin, purlin, girder,
A first plate portion disposed along a side surface of the rafter, a second plate portion provided by being bent vertically from one side portion of the first plate portion, and disposed along an upper surface of the horizontal member, The first plate portion is provided by being bent perpendicularly to the first plate portion from the other side portion perpendicular to the one side portion of the first plate portion, and further including a downward extending portion extending vertically downward from the second plate portion, The downwardly extending portion is composed of a third plate portion disposed along the front surface of the horizontal member, and the downwardly extending portion of the first plate portion, the second plate portion, and the third plate portion includes: A rafter fixing hardware in which attachment holes for attaching fastening members such as screws and nails are formed toward the rafter and the horizontal member.   The rafter fixing hardware according to claim 1, wherein the rafter fixing hardware is formed by bending a single metal plate cut into a predetermined shape.   In the central part of one side of the first plate part where the first plate part and the second plate part are bent vertically and connected, a line segment perpendicularly intersecting the one side part is bent outside the corner part. A reinforcing convex portion having a substantially triangular cross-section that is extruded inward from the inside is provided so as to protrude inside the bent corner portion across the first plate portion and the second plate portion. The rafter fixed hardware according to 2. It is a shed assembly structure formed by tightly fixing the rafter to the rafter supporting horizontal member using the rafter fixing hardware according to any one of claims 1 to 3, wherein the rafter and the horizontal member The first plate portion is disposed along one side surface of the rafter, the second plate portion is disposed along the upper surface of the horizontal member, and below the third plate portion. In the state where the extending portion is arranged along the front surface of the horizontal member, the rafter is fastened to the horizontal member by attaching the fastening members to the mounting holes toward the rafter and the horizontal member. Fixed roof structure.

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