JP6599385B2 - Connector - Google Patents

Description

  The present invention relates to a round bar-like connector embedded in a member in order to integrate adjacent members in various tree structures.

  In various wooden structures such as wooden construction, there are various methods for integrating adjacent members, but in recent years, rod-shaped hardware is often used from the viewpoint of strength and cost. This rod-shaped hardware is called a hozo pipe or the like, and is embedded so as to penetrate the boundary between members, and then a drift pin or the like is driven from the surface of the member toward the hardware, and the members are integrated via the hardware. For such hardware, various technical developments are in progress, and those having a function of absorbing an impact are disclosed as in both patent documents described later.

  In patent document 1, even when a load acts in a direction in which the joined woods are separated from each other, a joint hardware that makes it difficult to cause cracking of the wood is disclosed. This joint hardware is in the form of a pipe, and after embedding the adjacent wood such as the base and pillar, a pin is driven from the surface of each wood toward the joint hardware, and the wood is integrated via the joint hardware. To do. Further, a deformation hole is provided in the middle part of the metal joint, and the strength of the metal joint is intentionally reduced. This deformation hole is located in the vicinity of the boundary between the woods, and in the event of an earthquake or the like, a large elastic-plastic deformation is generated around the deformation hole to absorb the impact and prevent cracking of the wood.

  In the following Patent Document 2, a hozo pipe that connects members is disclosed. This hozo pipe is embedded so as to penetrate through adjacent members as in the above-mentioned Patent Document 1, and then a drift pin is driven from the surface of each member toward the hozo pipe, and the members are integrated via the hozo pipe. Furthermore, an extended portion is provided near the middle of the hozo pipe to make it easy to cause elasto-plastic deformation. The expansion part is a radially expanded whole circumference of the hozo pipe, and this part functions like a spring and absorbs an impact. As a matter of course, the extended portion is disposed near the boundary between two adjacent members.

JP2011-226175A JP 2012-52382 A

  The metal joint disclosed in Patent Document 1 has a very simple structure, but due to its shape, in the vicinity of the equator of the deformation hole (a position where the deformation hole is widest in the direction perpendicular to the axial direction of the metal joint). Stress concentration occurs, cracks extend from there, and the joint metal is eventually damaged, which may make it impossible to maintain the joint between the woods. Further, the hozo pipe disclosed in Patent Document 2 is difficult to produce in a variety of small quantities due to its unique shape, and it is difficult to supply an optimally shaped product that meets individual needs at a low price. Furthermore, in order to accommodate the extended portion of the hozo pipe, it is necessary to machine a counterbore hole in the member.

  A large amount of various hardware is used at the construction site of wooden buildings. Therefore, when connecting members using hardware, it is desirable that the operation can be completed without extra effort. Also, during construction, the hardware may inadvertently come into contact with heavy objects, but even in such a case, it is desirable that it is not easily damaged. Thus, the hardware should consider the convenience at the time of construction other than the original purpose of firmly connecting the members.

  The present invention has been developed on the basis of such a situation, and an object thereof is to provide a round bar-like connector that can absorb an impact without causing stress concentration and is also considered in terms of convenience during construction.

  The invention according to claim 1 for solving the above-mentioned problem is a round bar-like connector embedded so as to penetrate through pilot holes provided in individual members in order to integrate a plurality of members. The peripheral surface is provided with a plurality of side holes for allowing a drift pin or the like to be inserted from the surface of the member to pass therethrough, and the side hole located inside one of the members and the inside of the other member. An oblong hole extending in the axial direction is provided between the side hole and the side hole to cause elastic-plastic deformation.

  The connection tool according to the present invention is used to integrate members constituting various wooden structures such as pillars and horizontal members, and is embedded so as to penetrate through a plurality of members to be connected like a general hozo pipe. In addition, although the cross section of a connector assumes a circular shape, it may be solid or hollow. As for the member, all kinds of wood such as laminated wood and solid wood are assumed, and in order to embed the connecting tool, a pilot hole is processed in advance in the member. The pilot hole is finished to an inner diameter that can hold the connector without looseness.

  The connecting device according to the present invention is usually used to integrate two adjacent members, but can be embedded so as to penetrate three or more members to be laminated and integrated together. About the specific example in the case of integrating two members, the structure which connects a perpendicular | vertical pillar, a horizontal member, etc. in a letter shape or L shape is mentioned. As a specific example of integrating three members, there is a structure in which pillars are brought into contact with the upper and lower surfaces of a horizontally extending horizontal member, and these are connected in a cross shape, from the upper pillar to the lower pillar. Embed the connector so as to penetrate, and sandwich the horizontal member between the upper and lower pillars.

  The side hole is a round hole that penetrates the side peripheral surface of the connector, and by inserting a drift pin or bolt into the hole, the connector is integrated with the member, and the connector is prevented from being pulled out from the member. Therefore, although the side hole is provided at a plurality of locations, the arrangement method may be freely determined according to the application. Moreover, in order to insert a drift pin and a bolt into a member, a certain hole is processed in the position concentric with a side hole.

  The oval hole is a hole that penetrates the side peripheral surface of the connector, but is not a simple circle but an oval that extends in the axial direction. In the present invention, an oval refers to a shape in which opposing semicircles are connected by a straight line, such as a track in an athletic field. By providing the oblong hole, the area of the cross section of the coupler is intentionally reduced, and the elasto-plastic deformation is promoted by increasing the stress generated inside. By providing an oval hole in this way, the load is transmitted in a region located outside the region, but the area of the cross section of this region is almost constant along the axial direction, so The stress is almost evenly distributed, and there is no place where the stress increases locally.

  The oval hole is arranged in a section where a tensile load is generated when a load is applied in a direction in which a plurality of connected members are pulled apart. Therefore, when embedding the connector so as to straddle the two members, the oval hole needs to be provided between the side hole located inside one member and the side hole located inside the other member. Inevitably, the oval hole is located near the boundary between the two members. In addition, when integrating three members with one connector, the oval hole is located inside the central member.

  The length of the oblong hole can be adjusted by increasing or decreasing the extension, and the extension can be increased in order to easily cause elastic-plastic deformation. When the connector is hollow, the oblong holes are arranged so as to face each other across the axis. Further, in principle, the oblong hole is provided at only one place with respect to one connector, but when it is desired to further promote elasto-plastic deformation, it may be provided at two places in a cross shape as viewed from the cross section. These two oval holes intersect near the center of the connector and carry various loads at four locations on the outer edge.

  As in the first aspect of the present invention, by providing an oblong hole in the round bar-like connector, when a tensile load is applied to the connector, the stress is substantially evenly distributed in the region located outside the oblong hole. Disperses and can absorb impact without causing stress concentration. Therefore, even when an earthquake or the like is encountered, the tenacity until breakage is improved, and the safety of the wooden structure can be improved.

  When manufacturing the connector, the oblong hole can be formed simultaneously with the side hole, and there is no need to change the conventional manufacturing process. The connector is a single bar with no joints, and its handling is the same as that of a conventional hozo pipe. Further, the oval hole is not shaped to narrow the outer diameter of the connector, and the strength against bending load is not extremely reduced. For this reason, even when inadvertently in contact with a heavy object during construction, the connector is unlikely to be damaged. As described above, the connector according to the present invention has few factors for increasing the manufacturing cost, and the convenience during construction is the same as the conventional one.

It is the perspective view which shows the example of a shape of the coupling tool by this invention, and its usage example, and assumes that a pillar and a horizontal member are integrated in a letter shape using a coupling tool. On the right side of the figure, the side surface and longitudinal section of the connector are drawn. In the perspective view and longitudinal cross-sectional view which show the state which integrated the two members of FIG. 1 in the shape of a letter, the upper surface of the lower member and the lower surface of the upper member are contacting. FIG. 1 is a longitudinal sectional view showing a case where a load is applied in a direction of separating the two members after the two members of FIG. 1 are integrated; Shows the state of being pushed back after that. It is a perspective view which shows the case where a horizontal member is pinched | interposed with an up-and-down pillar using the connection tool by this invention, and these are integrated in a cross shape. In addition, on the right side of the figure, various shapes of the coupling tool are drawn. It is a perspective view which shows the case where a connector is made hollow, and assumes that a pillar and a horizontal member are integrated in a letter shape. On the right side of the figure, a side surface, a longitudinal section, and a BB section of the connector are drawn.

  FIG. 1 shows an example of the shape of a connector 10 according to the present invention and an example of its use. In FIG. 1, it is assumed that the upright member 31 and the horizontally extending member 41 are integrated in a letter shape using the round bar-shaped connector 10 and the drift pin 25. Wood (including laminated timber). 1 is a column, and the member 41 is a horizontal member. The lower surface of the horizontal member is placed on the upper surface of the column.

  The connector 10 is embedded so as to straddle the boundary between the members 31 and 41. Therefore, the member 31 has a bottomed prepared hole 33 extending downward from the center of the upper surface. Further, the member 41 has a prepared hole 43 penetrating the upper and lower surfaces at a predetermined position. Each of the pilot holes 33 and 43 has an inner diameter into which the connector 10 can be inserted without loosening, and the horizontal displacement of the two members 31 and 41 is restricted by simply inserting the connector 10 so as to penetrate the pilot holes 33 and 43. Is done.

  In order to integrate the connector 10 with the members 31 and 41, the drift pin 25 is driven from the side surfaces of the members 31 and 41 toward the connector 10. Therefore, the side surfaces of the members 31 and 41 are processed with pin holes 35 and 45 that cross the pilot holes 33 and 43 and reach the opposite surface, and the connector 10 has side holes that penetrate the side peripheral surfaces thereof. 13 and 14 are provided, and after the pin holes 35 and 45 and the side holes 13 and 14 are aligned concentrically, the drift pin 25 is driven. The pin holes 35 and 45 have an inner diameter capable of holding the drift pin 25 by friction, and the drift pin 25 after driving does not fall off naturally. Further, the side holes 13 and 14 are also kept loose from the drift pin 25 to a minimum.

  The number and arrangement of the side holes 13, 14 and the pin holes 35, 45 can be freely determined according to the application. In FIG. 1, a total of three rows of pin holes 45 are processed on the side surface of the member 41. These are lined up and down. On the other hand, in the member 31, the pin hole 35 is processed in two directions orthogonal to each other in order to prevent the crack from extending along the grain direction. Of course, these pin holes 35 and 45 need to be processed at predetermined positions based on the arrangement of the side holes 13 and 14.

  Thus, embedding the connector 10 so as to penetrate the members 31 and 41 and fixing the connector 10 with the drift pin 25 are no different from the conventional method. However, the present invention is characterized in that an oblong hole 17 is provided in the vicinity of the center of the connector 10 to easily cause elastic-plastic deformation. The oval hole 17 is an oval formed by connecting semi-circles opposed to each other vertically with a straight line when the connector 10 is erected, and penetrates the side peripheral surface of the connector 10. Therefore, in the section in which the oval hole 17 is provided, the area of the cross section of the connector 10 is reduced, the stress when a load is applied increases, and elastoplastic deformation is likely to occur compared to other sections.

  The oblong hole 17 needs to be provided in a section to which the entire load is applied when a load is applied in a direction in which the two members 31 and 41 are separated from each other. Therefore, the oval hole 17 is located between the side hole 13 that enters the inside of the lower member 31 and the side hole 14 that enters the inside of the upper member 41. By changing the extension of the oval hole 17, the degree of elastic-plastic deformation of the connector 10 can be adjusted. If the oval hole 17 is extended, the oval hole 17 is more easily deformed.

  FIG. 2 shows a state in which the two members 31 and 41 of FIG. 1 are integrated in a letter shape. The upper surface of the lower member 31 and the lower surface of the upper member 41 are in contact with each other. Further, the connector 10 is embedded so as to penetrate the two members 31, 41, and the drift pin 25 driven from the side surface of each member 31, 41 penetrates the connector 10, and the connector 10 is connected to each member 31, 41. 41 is integrated. Therefore, a load that separates the two members 31 and 41 is transmitted only through the connector 10. On the other hand, the compressive load is transmitted not only by the contact surfaces of the two members 31 and 41 but also by the connector 10.

  The oval hole 17 must be provided between the side hole 13 that enters the inside of the lower member 31 and the side hole 14 that enters the inside of the upper member 41, and inevitably the boundary between the two members 31 and 41. Located in the vicinity. If an excessive load acts in the direction in which the two members 31 and 41 are separated from each other, this load is received by the connector 10 at once. However, the stress is increased in the region located outside the oval hole 17 than in the other regions. , Will transform intensively.

  FIG. 3 shows a case where a load is applied in a direction in which the two members 31 and 41 of FIG. In the “stretched state” in the upper part of FIG. 3, the connector 10 is stretched by the load, and a gap is generated at the boundary between the two members 31 and 41. In this way, the deformation of the connector 10 absorbs the impact and prevents the members 31 and 41 from being damaged. Even after the connector 10 is deformed, if it is within the range of elastic deformation, it is quickly restored to its original state.

  If the load that separates the two members 31 and 41 is excessive, plastic deformation occurs in a region located outside the oblong hole 17, and a gap remains at the boundary between the two members 31 and 41. However, even in this state, the connection of the two members 31 and 41 is maintained via the connector 10, and the strength of the connection structure does not extremely decrease. Then, after the connector 10 is plastically deformed, when a load is applied in a direction in which the two members 31 and 41 approach due to gravity or the like, it is positioned outside the oblong hole 17 as in the “push-backed state” below in FIG. The region to be deformed is deformed again, the gap between the two members 31 and 41 is reduced, and the state close to the initial state is restored.

  FIG. 4 shows a case in which the connecting member 11 according to the present invention is used to sandwich the horizontal member between the upper and lower columns and integrate them into a cross shape. In FIG. 4, a horizontally extending horizontal member is a member 41, a column disposed below the horizontal member is a member 31, and a column disposed above the horizontal member is a member 51. And the upper and lower members 31 and 51 are pulled near by the connector 11, and the member 41 is inserted | pinched between them. In this sandwiched member 41, a pilot hole 43 penetrating the upper and lower surfaces is processed, and the connector 11 is embedded therein, but the drift pin 25 is not driven therein. The upper and lower members 31 and 51 are respectively provided with lower holes 33 and 53 and pin holes 35 and 55, and a drift pin 25 is driven so as to penetrate these holes.

  The connector 11 is provided with two rows of side holes 13 and 15 at both the upper end and the lower end. Among them, the two rows of side holes 13 at the lower end portion enter the inside of the member 31, and the two rows of side holes 15 at the upper end portion thereof enter the inside of the member 51. An oblong hole 17 is provided in the center of the connector 11. Further, in FIG. 4, as shown in the “enlarged AA cross section”, the oval holes 17 are provided at two places, and these cross in a cross shape near the center. Therefore, the load is transmitted at four positions located outside the oval hole 17.

  FIG. 5 shows a case where the connector 12 is hollow, and it is assumed that the upright member 31 and the horizontally extending member 41 are integrated into a letter shape. The oblong hole 17 of the connector 12 is inevitably formed so as to cut out the side peripheral surface. However, in consideration of balance, a pair of opposite faces are sandwiched with the axis line drawn as shown in the “BB cross section”. It is arranged as follows. In addition, in FIG. 5, a bolt 26 is used as means for integrating the connector 12 with the members 31 and 41. The tip portion of the bolt 26 is inserted into the pin holes 35 and 45, reaches the opposite surface through the side holes 13 and 14, and the nut 28 is screwed there. In addition, in order to relieve | stress the stress which acts on the surface of the members 31 and 41, the washer 27 is integrated as needed.

  As shown in the respective drawings so far, the present invention is characterized in that the oblong holes 17 are provided in the round bar-shaped couplers 10, 11, 12, and the arrangement of the members 31, 41, 51 to be coupled, etc. Is free. Further, the arrangement of the side holes 13, 14, 15 may be freely determined in consideration of the members 31, 41, 51. However, the oval hole 17 is arranged in the vicinity of the boundary between the members 31, 41, 51, and is large in a region located outside the oval hole 17 when a load is applied in a direction in which the members 31, 41, 51 are separated from each other. It is necessary to generate stress.

10 connector (one oval hole)
11 connector (two oblong holes)
12 Connecting tool
13 Side hole (enters inside member 31)
14 Side hole (enters inside member 41)
15 side hole (enters inside member 51)
17 Oval hole 25 Drift pin 26 Bolt 27 Washer 28 Nut 31 Member (Column below the horizontal member)
33 Pilot hole 35 Pin hole 41 Member (horizontal material)
43 Pilot hole 45 Pin hole 51 Member (column above the horizontal member)
53 Pilot hole 55 Pin hole

Claims (1)

In order to integrate a plurality of members (31, 41, 51), a round bar-like connector embedded so as to penetrate through the pilot holes (33, 43, 53) provided in the individual members (31, 41, 51). The side peripheral surface is provided with a plurality of side holes (13, 14, 15) for allowing a drift pin (25) inserted from the surface of the member (31, 41, 51) to pass therethrough.
Between the side hole (13) located inside one of the members (31) and the side hole (14 or 15) located inside the other member (41 or 51), there is no elastic. A connector having an oblong hole (17) extending in the axial direction in order to cause plastic deformation.

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