JP5398011B2 - 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 to bend alternately and form a bellows shape, and the height of each bent portion gradually increases from the side close to the corner C to 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 is a technical problem that it extends from the bent portion close to C first, and its 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 that is alternately bent along the bend line and formed in a bellows shape, the inner side in the direction along the straight line passing through the corner C inside the joint portion as the bend line. By combining a bend line and an outer bend line in a direction along a straight line that is disposed on both sides of the inner bend line and that is spaced outward from the inner corner C of the joint, Change in the center of deformation in the joint caused by direction To allow the bending deformation may more functionally correspondingly adapted to and thereby adopts a technical means that realize a smooth energy absorption. That is, according to the present invention, when the technical means is employed, when the external force in the compression direction acts and the center of deformation in the joint is at the corner C inside the joint, the former The bent portion bent along the inner bending line can be bent and deformed in a more functionally adapted form, and conversely, an external force in the tensile direction acts to cause the center of deformation in the joint portion to be In the case of the outer corner D, since the bent portion bent along the latter outer bending line can be bent and deformed in a more functionally adapted form, the entire force against the external force in both directions Bending deformation that is more functionally suited to the target is possible, so that smooth energy absorption can be realized.

According to the joint reinforcing tool according to the present invention, the following effects can be obtained.
(1) Flexural deformation in a form more functionally adapted to the change in the deformation center portion of the joint portion due to the direction of external force is possible, and thus smooth energy absorption can be realized.
(2) Since the bending deformation of the deforming portion is distributed to the bending portions along the inner bending line and the outer bending line, the bending deformation is performed in a form more functionally adapted to the change in the deformation center portion of the joint portion. Since the uneven distribution of the deformation amount can be reduced and averaged, the performance as a joint reinforcement tool can be improved.
(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. The mounting 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. 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. As the bending lines, an inner bending line in a direction along a straight line passing through the inner corner C of the joint portion, and both sides of the inner bending line, the inner corner C of the joint portion is provided. In combination with an outer bending line in a direction along a straight line passing through a portion separated from the outer side. As a result, bending deformation that can be more functionally adapted to the change in the center of deformation in the joint portion caused by the direction of the external force as described above is possible, and thus smooth energy absorption is possible. . It should be noted that the height of each bent portion is configured to gradually increase from the side closer to the corner toward the outside, has an appropriate elasticity and plastic property, and has an elastic limit so as not to break the joint. A configuration that can cope with the above stress is desirable. Incidentally, the number and interval of the bent lines, the size of the interval between the inner corner C serving as a reference for the inner bent line and the outer bent line, and the portion spaced outward from the corner C, The direction can be arbitrarily selected depending on the case. In addition, through selection regarding the specific shape of the bent portion such as the height and width of the bellows-like folded portion and the bending angle, the specific shape of the deformed portion is set in consideration of the manner of deformation with respect to external force and the spring characteristics. It is also possible to do.

  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 by the connecting portion 6 so that the overall shape is substantially L-shaped, and thus the structure is basically the same as the conventional joint reinforcing tool illustrated in FIGS. 5 and 6. 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 reinforcing tool 1 according to the present embodiment, as shown in the enlarged view of the main part of FIG. 4, regarding the bent line serving as a reference line when the deformed portion 7 is bent in a bellows shape, Three inner bending lines La to Lc in a direction along a straight line passing through the inner corner C of the joint portion constituted by the joining members 2 and 3, and disposed on both sides of the inner bending lines La to Lc, The above-mentioned prior art in that a combination of two outer bending lines Ld and Le in a direction along a straight line passing through a portion E spaced outward from the inner corner C of the joint is employed. It has characteristics that are not present. Thereby, when the external force Fc in the compression direction acts as shown in FIG. 1 and the center of deformation in the joint portion is at the inner corner C, the bending bent along the inner bending lines La to Lc. When the part can be bent and deformed in a more functionally adapted form, and conversely, when the external force Ft in the pulling direction acts as shown in FIG. Can be bent and deformed in a form in which the bent portions bent along the outer bent lines Ld and Le are more functionally adapted. As a result, compared to the conventional bending form in which all bending lines L are set in a direction along a straight line passing through the inner corner C, the bending is more functionally adapted to the external force in both directions. Deformation is possible, and as a result, smoother 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 the portion C changes to the outer corner D, the bending deformation at each bending portion along the bending lines La to Le can be sufficiently handled. 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 close to the corner portion C, which is the focal point of the bellows portion, extends first, and a sufficient function is achieved by the stress concentration. Although there is a technical problem of being hindered, according to the bent form of the present invention, a bent form that is more functionally adapted is realized by the bent part bent along the outer bent lines Ld and Le. The technical problem will be greatly alleviated. In the present embodiment, the case where the bending lines La to Le are set symmetrically about the inner bending line La located in the center is exemplified, but the movement destination related to the center part of the deformation generated in the applied joint part. That is, in the present embodiment, it is also effective to make the portion E as the focal point of the outer bending lines Ld and Le unevenly distributed toward the corner D in accordance with the position of the outer corner D.

  1: Joint reinforcement tool, 2: Horizontal member, 3: Vertical member, 4, 5: Mounting portion, 6: Connection portion, 7: Deformation portion, 8: Insertion hole, La to Lc: Inner bending line, Ld, Le : Outer bend 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, as the bending line, an inner bending line in a direction along a straight line passing through the corner C on the inner side of the fitting part, and both sides of the inner bending line. The center part of the deformation in the joint portion caused by the direction of the external force by combining with the outer bending line in the direction along the straight line that passes through the portion that is disposed and is spaced outward from the inner corner C of the joint portion. A joint reinforcement tool characterized by enabling bending deformation that can be more functionally adapted to changes in the size.

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