JP5398013B2 - Joint reinforcement tool - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention is applied to a joint portion that joins members as in the case of joining a horizontal member such as a base or a beam member and a vertical member such as a column member, particularly for a joint portion of a wooden building. The present invention relates to a joint reinforcing tool suitable for reinforcement.

  With this type of joint reinforcing tool, a bellows-like connecting portion is interposed between the attachment portions on both sides, and is integrally formed in a substantially L shape, and external force is absorbed by deformation of the bellows-like connecting portion. In addition, the conventional technique for preventing the collapse of the wooden building by restoring the joint part to the original state by the elastic force accumulated by the deformation, and the mounting parts on both sides integrally formed in a substantially L shape And a conventional technique for preventing collapse of a wooden building by utilizing a buffering effect of a reinforcing member provided between the mounting portions and a restoring force due to spring elasticity. However, in the case of these conventional reinforcing tools, the plate surface that absorbs the external force is in a state along the mounting surfaces on both sides. In the case of an external force containing a component in the direction of twisting the reinforcing tool acting from an oblique direction with respect to the mounting surface, although it can function effectively through an angle change between, the direction along the plate surface of the reinforcing tool However, since an external force acts, it could not function effectively in that respect.

  Therefore, the present applicant can function effectively against an external force including a component in the direction of twisting the reinforcing tool acting obliquely on the joint, and can absorb energy more smoothly and efficiently. In order to provide a proper joint reinforcing tool, as illustrated in FIGS. 5 and 6, both attachment portions 104, 105 for attaching the joint reinforcing tool 101 to the joining members 102, 103 constituting the joint portion, A connecting portion 106 that connects these mounting portions, and a deformed portion 107 provided in the connecting portion 106 is formed along a plurality of bending lines L that extend substantially radially around the inner corner C of the joint portion. There has been proposed a joint reinforcing tool configured such that it is alternately bent and formed into a bellows shape, and the height of each bent portion gradually increases from the side close to the corner C toward the outside (Patent Document 1). The present invention relates to an improvement of the prior art.

JP 2010-31630 A

  As described above, the present invention relates to an improved invention of the prior art, and can analyze in more detail how the joint portion behaves when an external force is applied, and can be more functionally adapted to the behavior. An object of the present invention is to develop a joint reinforcement tool and provide a joint reinforcement tool capable of absorbing energy more smoothly.

  FIG. 1 and FIG. 2 are schematic explanatory diagrams showing the basic behavior principle of the joint portion when an external force focused on in the present invention is applied. As shown in FIG. 1, when an external force Fc in the compressing direction acts on the joining members 2 and 3 constituting the joint portion to which the joint reinforcing tool 1 is applied, between the joining members 2 and 3. Rotational moment acts in the direction of reducing the angle between the joining members 2 and 3 around the inner corner C of the joint, and the deformation of the joint portion also occurs around the inner corner C. On the other hand, as shown in FIG. 2, when an external force Ft in the tensile direction is applied to the joining members 2 and 3, conversely, the outer corners D of these joining members 2 and 3 are centered. A rotational moment acts in the direction in which the angle between the joining members 2 and 3 is increased, and the deformation of the joint portion also occurs around the outer corner D. Here, a particularly important point of interest is that the center part of the deformation generated between the joining members 2 and 3 depends on the direction of the external force acting on the joining members 2 and 3 constituting the joint portion. That is, it changes from the inner corner C between the three to the outer corner D.

  Therefore, when the external force is relatively small and the deformation of the joint portion is small, the deformation amount of the bellows portion of the joint reinforcing tool 1 is also small. Even if it changes from C to the outer corner D, it can sufficiently cope. On the other hand, when the external force increases and the deformation amount of the joint portion increases, the deformation amount of the bellows portion of the joint reinforcing tool 1 also increases. In the case of the conventional bent form focusing on the portion C, when the deformation center of the joint portion changes to the outer corner portion D as shown in FIG. 2, the corner portion that is the focal point of the bellows portion There has been a technical problem that the bent portion on the side close to C extends first, and sufficient function is hindered by the stress concentration.

  Therefore, in the present invention, the center part of the deformation that occurs between the joining members due to the direction of the external force acting on the joining member that constitutes the joint portion described above is located outside the inner corner C between these joining members. Focusing on the point that changes to the corner D, it is composed of attachment parts on both sides that are attached to the joint part that joins the members, and a connection part that connects these attachment parts. In the joint reinforcing tool provided with the deformed portion formed in an accordion shape by alternately bending along the bending line, as the bending line, a central bending line disposed in the center and both sides sandwiching the central bending line A position of the focal point through which a plurality of outer bending lines in a direction along a straight line passing through a focal point spaced from the inner corner C of the joint portion to the outside are combined and an extension line of the outer bending line passes Around the central bend line Distance from the corner portion C of the inner mouth has adopted the technical means of setting the portion to be sequentially increased. According to the present invention, by adopting the technical means, when an external force in the compression direction acts and the center of deformation in the joint portion is at the inner corner C of the joint portion, The bent portion bent along the central bend line in the middle and the outer bend line in the vicinity thereof can be bent and deformed in a more functionally compatible form, and similarly, the external force in the tensile direction acts to deform the joint portion. In the case where the center portion is at the outer corner portion D of the joint portion, the bent portion bent along the outer bent line arranged on the outer side can be bent and deformed in a more functionally adapted form. Therefore, as a whole, bending deformation that is more functionally adapted to external forces in both directions is possible, and as a result, smooth energy absorption can be realized.

According to the joint reinforcing tool according to the present invention, the following effects can be obtained.
(1) The combination of the center bend line and the outer bend line enables bending deformation in a form more functionally adapted to the change in the deformation center of the joint portion due to the direction of external force, and Can realize smooth energy absorption.
(2) The position of the focal point through which the extension line of the outer bend line passes is set to a part where the distance from the inner corner C of the joint portion increases sequentially with the central bend line as the center. Therefore, when an external force in the compression direction acts and the deformation center portion in the joint portion is at the corner C inside the joint portion, the central bend line in the bend line and the outer bend line in the vicinity thereof The bent portion bent along the shape is bent and deformed in a more functionally adapted form, and similarly, an external force in the tensile direction acts to cause the deformation center portion in the joint portion to be the outer corner D of the joint portion. In some cases, the bending portion bent along the outer bending line arranged on the outer side can be bent and deformed in a more functionally adapted form, and as a whole, it is more resistant to external forces in both directions. Functionally adapted bending deformation is possible.
(3) Since the deformed portion provided in the connecting portion that connects the attachment portions on both sides is alternately bent along a plurality of bending lines and formed into a bellows shape, the twisting direction acting on the joint portion from an oblique direction is formed. It can function effectively against external forces including components.

It is the schematic explanatory drawing which showed the basic behavior principle of the joint part when external force acts. It is the schematic explanatory drawing which showed the basic behavior principle of the joint part when the external force of another direction acts. It is the front view which showed the application state of one Example of this invention. It is the principal part enlarged view which expanded and showed the principal part of the Example. It is the front view which showed the application state of the conventional joint reinforcement tool. It is the A arrow directional view which showed the same joint reinforcement tool.

  The present invention is particularly suitable as a joint reinforcement tool applied to a joint part in which a horizontal member such as a base or a beam member and a vertical member such as a column are joined in a wooden building, but is not limited thereto. It can be widely applied to other structural forms. In addition, the joint reinforcing tool according to the present invention is generally made of metal, but other forms such as hard resin are also possible. Further, the overall shape of the joint reinforcing tool is not particularly limited, and is formed in a fan shape having a notch in the vicinity of the corner C on the inside of the joint, or an arc shape thereof. A substantially inverted triangular shape using a straight edge instead of the edge is possible. In addition, the attachment portions on both sides constituting the joint reinforcing tool can be increased in rigidity by forming the cross-sectional shape into a substantially U shape or a substantially L shape. A cross-sectional shape is also possible. The connecting portion is configured to connect the attachment portions on both sides constituting the joint reinforcing tool. When a mounting portion having a substantially U-shaped cross-section is employed, the opposing side portions of the mounting portions on both sides may be connected to each other, or the side portions may be connected to each other. You may do it. Moreover, the deformation | transformation part formed in the connection part is formed in a bellows shape by bending | flexing alternately along several bending lines. The bent lines are arranged along the straight line passing through the central bent line arranged at the center and the both sides of the central bent line and passing through the focal point spaced outward from the inner corner C of the joint. Combine multiple outer bend lines of direction. Further, the position of the focal point through which the extension line of the outer bending line passes is set to a portion where the distance from the inner corner C of the joint portion increases sequentially with the central bending line as the center. By adopting the technical means, when an external force in the compression direction acts as described above and the center of deformation in the joint is at the corner C inside the joint, the center in the bent line The bent part bent along the bent line and the outer bent line in the vicinity thereof is bent and deformed in a more functionally adapted form, and similarly, an external force in the tensile direction acts to cause the center of deformation in the joint part to be When it exists in the corner D of the outer side of a joint part, the bending part bent along the outer side bending line arrange | positioned more outside can be bent and deform | transformed in the form more functionally adapted. As a result, it is possible to perform bending deformation that is more functionally adapted to the external force in both directions, and thus it is possible to realize smooth energy absorption. By the way, the height of each bent portion is configured to gradually increase from the side close to the corner portion C toward the outside, and has appropriate elasticity and plastic properties, so that the joint portion does not break. A form that can cope with stress exceeding the limit is desirable. In addition, the number of the bent lines, the interval between them, the size of the distance from the inner corner C of the focal point through which the extension line of the outer bent line passes, or the distance interval is centered on the central bent line. As for the specific form of increasing sequentially, any selection can be made according to the case. Further, the position of the focal point through which the extension line of the outer bending line passes is unevenly distributed laterally from the extension line of the center line that bisects the inner angle of the joint portion where the members are joined to each other. If it is made to approach the corner D side, a bending form that is functionally adapted to the behavior of the joint portion is possible.

  FIG. 3 is a front view showing an application state of the joint reinforcing tool according to one embodiment of the present invention, and FIG. 4 is an enlarged view of a main part thereof. As shown in the figure, the joint reinforcing tool 1 according to the present embodiment includes attachment parts 4 and 5 attached to the joining members 2 and 3 constituting the joint part on both sides, and between the attachment parts 4 and 5. Are connected to each other by the connecting portion 6 so that the overall shape is substantially L-shaped. In this regard, the connecting portion 6 basically has the same configuration as the conventional joint reinforcing tool illustrated in FIGS. Incidentally, the overall shape of the joint reinforcing tool 1 can be a shape other than the L shape according to the joining angle between the joining members 2 and 3.

  In the intermediate part of the connecting part 6 that connects the mounting parts 4 and 5, there are provided deformed parts 7 that are alternately bent along a plurality of bending lines and formed in a bellows shape. Incidentally, the deforming portion 7 may be partially formed in the intermediate portion of the connecting portion 6 as in the present embodiment, or may be formed on the entire connecting portion 6. In the figure, 8 is an insertion hole for a connector such as a brace.

  In the case of the joint reinforcement tool 1 according to the present embodiment, as shown in the enlarged view of the main part of FIG. 4, as the bent line that becomes a reference line when the deformed portion 7 is bent in a bellows shape, A central bend line La arranged at the center and both sides of the center bend line La and arranged in a direction along a straight line passing through the focal points E and F spaced outward from the inner corner C of the joint. A plurality of outer bending lines Lb to Le are combined. As for the position of the focal point through which the extension lines of the outer bending lines Lb to Le pass, the separation distance from the inner corner C of the joint portion is sequentially increased with the central bending line La as the center. In the case of the outer bending lines Lb and Lc, the focal point E is set as the focal point, and in the case of the outer bending lines Ld and Le, the focal point F is set as the focal point. In this way, the focal point E in the case of the outer bending lines Lb and Lc and the focal point F in the case of the outer bending lines Ld and Le are at positions away from the inner corner C, respectively. Since the radius between the focal points E and F in the deformation direction orthogonal to Lb to Le becomes large, even when the deformation center portion in the joint portion changes to the outer corner portion D due to the direction of the external force, As a result of the deformation direction of the bending lines Lb to Le approaching the deformation direction of the joint portion centered on the outer corner D, bending deformation that is more functionally compatible is possible. And when the external force of a compression direction acts and the center part of a deformation | transformation in a joint part exists in the corner C inside the said joint part, among the bending lines Lb-Le, central bending line La and its vicinity The bent portions bent along the outer bending lines Lb and Lc of the bent portion are bent and deformed in a form that is more functionally adapted, and similarly, an external force in the pulling direction acts and the center portion of the deformation in the joint portion is the aforementioned joint. In the case of the corner D on the outer side of the portion, the bent portion bent along the outer bent lines Ld and Le arranged on the outer side can be bent and deformed in a more functionally adapted form. As a result, bending deformation that is more functionally adapted to external forces in both directions is possible, and as a result, smooth energy absorption can be realized.

  Therefore, when the external force is relatively small and the deformation of the joint portion is small, the deformation amount in the deformation portion 7 of the joint reinforcing tool 1 is also small, so that the central portion of the deformation that occurs in the joint portion is the inner corner. Even if it changes from the part C to the outer corner D, it can sufficiently cope with the bending deformation in each bending part along the bending lines La to Le. On the other hand, when the external force is increased and the deformation amount of the joint portion is increased, in the conventional bending form in which all the bending lines L are set in the direction along the straight line passing through the inner corner portion C, When the deformation center of the portion changes to the outer corner portion D, as described above, the bent portion on the side close to the corner portion C, which is the focal point of the bellows portion, extends first, and the stress concentration is sufficient. Although there is a technical problem that the function is hindered, according to the bent form of the present invention, a bent form more functionally adapted is realized by the bent part bent along the outer bent lines Lb to Le. Therefore, the technical problem is greatly relieved. In the present embodiment, the case where the extension lines of all the bending lines La to Le are set so as to pass through the inner corner portion C is exemplified, but the moving destination relating to the center portion of the deformation occurring in the applied joint portion, That is, in the present embodiment, it is also effective to make the focal point through which all or a part of the extension lines of the bending lines La to Le pass unevenly toward the corner D depending on the position of the outer corner D. .

  1: Joint reinforcement tool, 2: Horizontal member, 3: Vertical member, 4, 5: Attachment portion, 6: Connection portion, 7: Deformation portion, 8: Insertion hole, La: Center bending line, Lb to Le: Outside Bending line

Claims (1)

  It is composed of attachment parts on both sides that are attached to the joint part that joins the members, and a connection part that connects these attachment parts, and the connection part is alternately bent along a plurality of bending lines. In the joint reinforcing tool provided with a deformed portion formed in a bellows shape, the bending line is arranged at both sides with a central bending line arranged at the center and the central bending line, and inside the fitting part. Combining a plurality of outer bending lines in a direction along a straight line passing through the focal point spaced outward from the corner, and the position of the focal point through which the extension line of the outer bending line passes is centered on the central bending line. A joint reinforcing tool characterized in that it is set at a site where the distance from the inner corner of the mouth portion increases in sequence.

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