JP2018131820A - Joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint for various wood structures not only which is easily applicable to a large cross section without exposing a metal part at a portion other than at a boundary of two members but which has an impact absorbing function.SOLUTION: A joint to integrate two members such as a column 41 and a horizontal member 51 or like comprises two fixers 11, a buried member 31 buried in both of the members, a bolt 18 attaching the fixers 11 to the buried member 31, and a buffer axis 21 integrating two fixers 11, wherein the fixer 11 is configured by integrating a plate 13 and a pipe 14, an end side of the pipe 14 being inserted to either of the members. Two fixers 11 are connected through screwing a male thread 15, the male thread 25 being provided on both ends of a buffer axis 21 to a female thread 25, the female thread 15 being provided in an inner surface of the pipe 14, and the bolt 18 further attaches the fixer 11 to the members. The joint can absorb an impact through an elastic-plastic deformation of the buffer axis 21 with no need of a through hole across both sides of the members, which exposes a metal part at a portion other than at the boundary of two members.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a connector disposed at a boundary between members in order to integrate adjacent members in various tree structures.

  In various wooden structures such as buildings, there are various methods for integrating adjacent members, but in recent years, various hardware is often used in consideration of earthquake resistance and workability. Since the hardware has a function of causing elastic-plastic deformation and absorbing an impact when receiving an excessive load, it prevents the connecting portion between the members from being broken at a stretch, and is excellent in terms of safety. For such hardware, various technical developments are underway, and those that further improve the function of absorbing impact are disclosed as in both patent documents described later.

  In patent document 1, the coupling tool which integrates two adjacent members with a long volt | bolt etc. is disclosed. This connector is composed of an embedded shaft (such as a lag screw) embedded in the member and a cap that presses the head of the long bolt, and the connection between the two members is to sandwich the embedded shaft between the head of the long bolt. It will be realized. After the long bolt is plastically deformed under an excessive tensile load, the head of the long bolt can be prevented from being lifted by the cap, and the looseness of the connecting portion can be minimized.

  Patent Document 2 discloses a connection structure for installing members such as columns and beams. This connection structure is a method of embedding lag screws and deformed rods so as to face each other from the boundary surface of both members, and pulling them concentrically with a tension bolt, but the tension bolt is not a normal bolt but its shaft part It is characterized in that a deformation region having a small elastic modulus is provided only in a part of the section. Except for the deformation region, by increasing the rigidity, even when the lengths of the tension bolts are different, the relationship between the load and the deformation amount can be made substantially uniform.

Japanese Patent Laid-Open No. 2015-031005 JP 2006-108893 A

  In both of the above-mentioned patent documents, two members are integrated with bolts, and the impact is absorbed using the elastic-plastic deformation of the bolts to prevent damage to the skeleton of the building. In order to insert the bolt, a hole penetrating both side surfaces is processed in one of the two members to be connected, and a hollow lag screw or the like is embedded therein. Thus, by machining the holes penetrating the both side surfaces of the member, metal parts such as bolts are exposed in addition to the boundary between the two members, which may affect the aesthetics after construction. Furthermore, in the case of a member having a large cross section, it is difficult to process a hole penetrating both side surfaces, and the operation of accommodating a lag screw, bolt, or the like in this hole may be complicated.

  The present invention was developed based on such circumstances, and in various wooden structures, metal parts are not exposed except at the boundary of two members, and can be used for members with large cross-sections, and absorbs shocks. The purpose is to provide a coupler having a function.

  The invention according to claim 1 for solving the above-mentioned problem is a connecting tool used for integrating two adjacent members such as a pillar and a horizontal member, and two pieces arranged at the boundary between the two members. Fixing tool, a burying tool embedded in a pilot hole provided in each of the two members, a bolt for integrating the embedded tool and the fixing tool, and a buffer shaft for integrating the two fixing tools. The fixing tool is configured such that a plate that contacts the surface of the member and a pipe that penetrates the front and back surfaces of the plate are integrated, and one end of the pipe enters a central hole provided in the member. The pilot hole is provided at a position covered with the plate, and the bolt is inserted into a round hole provided in the plate and screwed into an internal screw of the buried tool, and the buffer shaft is connected to the pipe. Installed internally and provided with male screws at both ends of the buffer shaft One end of the pipe is provided with a female screw to be screwed with the male screw, and the two fixing tools are arranged so that the female screw is separated from each other, and the end faces of both pipes are in contact with each other so as to penetrate the pipe. The buffer shaft is inserted into the fixing screw, and the fixing tool is in close contact with the female screw and the male screw.

  The connecting device according to the present invention has a function of firmly integrating two adjacent members and absorbing shocks in various wooden structures including buildings, and is arranged so as to straddle the boundary between the two members. . The two members to be connected are assumed to be wood (including laminated timber), and the arrangement of the two members is free, even in the case of L-shape or T-shape like columns and horizontal members. If there is, the end surfaces of the bars may be connected in a straight line. And this coupling tool is comprised centering on each component of a fixing tool, a buried tool, a volt | bolt, and a buffer shaft.

  The fixing tool is a metal part that is fixed to the surface of the member, and is attached to each member one by one, and therefore two fixing tools are used for one set of connecting tools. The fixing tool has a shape having a plate in contact with the surface of the member and a pipe penetrating almost the center of the plate, and the plate and the pipe are firmly integrated by welding or the like. In addition, since a pipe protrudes from the front and back both surfaces of a plate, it is necessary to embed the one end side in a member. Therefore, a central hole is processed at a predetermined position in the member. Further, the two fixing tools are arranged so that the end faces of the pipes are in concentric contact with each other.

  The embedment tool is a rod-like material that is embedded in the member so as to attach the fixing tool to the member, and serves as a foundation for supporting the fixing tool. The tool receives the load that presses the member and prevents the surface from sinking. Specific examples of the buried tool include a lag screw and a deformed steel bar. The lag screw is integrated with the member with ridges protruding from the side peripheral surface, and the deformed steel bar is integrated with the member with an adhesive. deep.

  The bolt is used to integrate the fixing tool with the embedded tool, and is inserted from the fixing tool toward the embedded tool. Therefore, a round hole into which the shaft portion of the bolt is inserted is provided in the plate of the fixing tool, and an inner screw that is screwed with the bolt is provided in the center of the end portion of the buried tool. Therefore, when the bolt is tightened, the fixing tool is integrated with the member via the buried tool. As a matter of course, the embedding tool is embedded at a position that is concentric with the round hole.

  The buffer shaft is a rod-shaped member used for closely attaching two fixing tools arranged concentrically, and is accommodated in the pipe of the fixing tool. Further, the buffer shaft is made of SNR (rolled steel bar for building structure) which is easy to cause elasto-plastic deformation without breaking, and has male threads at both ends thereof. Further, a female screw that is screwed with the male screw is formed on one end side of the inner peripheral surface of the pipe, and the two fixing tools are brought into close contact with each other through the buffer shaft. In addition, since the two fixing tools bring the end faces of the pipes into contact with each other in such a posture that the female screws are separated from each other, the total length of the buffer shaft inevitably increases, and elasto-plastic deformation tends to occur.

  After the two fasteners are brought into close contact with the buffer shaft, if a load is applied in the direction of separating the two fasteners, the buffer shaft is stretched, but if it is within the range of elastic deformation, the load is weakened. And restore to the original state. In addition, plastic deformation occurs in the buffer shaft due to excessive load, and when the two fasteners are pulled apart, the fastener and the buffer shaft are kept integrated by screwing the female screw and the male screw. There is no loosening of the tool.

  When the connecting member according to the present invention is used and the two members are actually integrated, the two fixing members are brought into close contact with each other in advance with a buffer shaft. Next, an embedding tool is embedded in each member, and a connecting tool is attached to one member using a bolt. Thereafter, the other member is brought into contact with the fixing tool, the position is adjusted, and finally, when the bolt is inserted toward the other member, the two members are integrated via a connecting tool or the like.

  In this way, the connecting tool is composed of a fixing tool, a buried tool, a bolt, a buffer shaft, etc., and the two fixing tools are brought into close contact with the buffer shaft, and the buried tool is embedded in each member, and the fixed tool is replaced with the buried tool. By inserting the bolts toward each other and integrating the two members, when an excessive load acts in the direction of separating the two members, the shock absorbing shaft absorbs the impact by elastically deforming the buffer shaft. In addition, since all bolts are inserted from the fixing tool toward the embedded tool, there is no need to machine a pilot hole penetrating both sides of the member, and no metal parts are exposed except at the boundary between the two members. .

  As in the invention of claim 1, the connecting tool is composed of a fixing tool, a buried tool, a bolt, a buffer shaft, etc. By integrating the two members by inserting bolts from the fixing tool to the buried tool, when an excessive load is applied in the direction of separating the two members, the shock is absorbed by the elastic-plastic deformation of the buffer shaft, and the building Prevent damage to the skeleton. The buffer shaft is disposed so as to penetrate the entire length of the two pipes arranged concentrically, and the total length is inevitably increased, and elasto-plastic deformation is likely to occur.

  The bolt for attaching the fixing tool to the member is inserted from the plate of the fixing tool toward the embedding tool, and the pilot hole for embedding the embedding tool does not need to penetrate the opposite surface of the member, and the entire length of the embedding tool It can be bottomed according to. Therefore, besides the boundary between the two members, a connection structure in which no metal parts are exposed can be easily realized, which is excellent in aesthetics and advantageous in terms of condensation and fire resistance.

It is a perspective view which shows the example of a shape of the coupling tool by this invention, and assumes integrating two members, a pillar and a horizontal member, with a coupling tool. FIG. 1 is a cross-sectional view showing the detailed shape of the connector of FIG. 1, depicting various states before assembly and after assembly. It is the perspective view which shows the state which integrated the pillar and horizontal member of FIG. 1, and the shape of the coupling tool after an assembly.

  FIG. 1 shows an example of the shape of a connector according to the present invention, and it is assumed that two members of a column 41 and a horizontal member 51 are integrated by a connector. Both the column 41 and the horizontal member 51 are made of wood (including laminated material), and an L-shaped connecting portion is constructed by placing the lower surface of the horizontal member 51 on the upper surface of the upright column 41. Further, the connecting tool is composed of the fixing tool 11, the embedding tool 31, the bolt 18, the buffer shaft 21, and the like. In this figure, two sets of connecting tools are arranged on both sides of the column 41 to improve the strength against the bending moment. I am letting.

  The set of connecting tools depicted in FIG. 1 includes two fixing tools 11, one buffer shaft 21, eight embedded tools 31, and the like. The fixing tool 11 is the center of the rectangular plate 13. The pipe 14 penetrates the two, and both are integrated by welding. The protruding height of the pipe 14 is substantially the same on both the front and back surfaces of the plate 13. The buffer shaft 21 has a simple round bar shape and is formed with male screws 25 at both ends thereof. Further, a square bar-like protrusion 26 is provided at the uppermost end portion to prevent rotation during operation. The buffer shaft 21 needs to undergo elasto-plastic deformation without breaking with an excessive load, and is made of SNR (rolled steel bar for building structure).

  The pipe 14 of the fixing tool 11 has an inner diameter that can accommodate the buffer shaft 21 without difficulty, but a female screw 15 that is screwed into the male screw 25 is formed only at one end thereof. Further, the two fixing tools 11 are arranged so that both female screws 15 are separated from each other. Therefore, the buffer shaft 21 passes through the entire area of the two pipes 14 arranged vertically, and the upper and lower ends of the buffer shaft 21 protrude from the pipe 14 and the lock nut 19 is screwed there. The lock nut 19 generates an axial force on the buffer shaft 21 and plays a role of preventing loosening at a screwed portion between the female screw 15 and the male screw 25. When the lock nut 19 is actually tightened, the protrusion 26 of the buffer shaft 21 is sandwiched with a tool to prevent the buffer shaft 21 from rotating.

  The burying tool 31 is a component that is the basis of the fixing tool 11 and is embedded in the column 41 and the horizontal member 51. The outer diameter of the burying tool 31 is greatly different from that of the head 32 and below. Similar to the lag screw, a ridge 35 extending spirally is formed. Further, a hexagonal hole for fitting a tool is provided at the center of the head 32, and an inner screw 38 is formed at the back thereof. In FIG. 1, a total of four embedding tools 31 are embedded under one plate 13, and the heads 32 come into contact with the plate 13 to disperse the compressive load and prevent deformation of the members.

  At the upper part of the column 41, there are two stepped portions 43 with corners cut out in a rectangular shape in order to accommodate the connecting tool, and a convex portion sandwiched between the two stepped portions 43 is provided. It contacts the horizontal member 51. A center hole 44 is machined in the center of the lower surface of the step 43 to embed the pipe 14 of the fixing tool 11. The inner diameter of the center hole 44 is finished to an inner diameter that allows the pipe 14 to be fitted without loosening, and prevents the coupling tool from loosening and also carries a horizontal load. Furthermore, pilot holes 45 are processed at four locations so as to surround the center hole 44. Although the embedded tool 31 is embedded in the lower hole 45, the inner diameter is enlarged near the entrance of the lower hole 45 in order to embed the head 32 thereof. In addition, the protruding item | line 35 of the embedding tool 31 bites into the internal peripheral surface of the pilot hole 45, and the embedding tool 31 is fixed so that a displacement is impossible.

  Also on the lower surface of the horizontal member 51, like the column 41, a center hole 54 for embedding the pipe 14 and a lower hole 55 surrounding the center hole 54 are processed. All of the center holes 44 and 54 and the pilot holes 45 and 55 are concentrically aligned on the column 41 side and the horizontal member 51 side. The bolt 18 plays a role of integrating the fixing tool 11 with the embedded tool 31 and is inserted from the round hole 16 provided in the plate 13 toward the inner screw 38 of the embedded tool 31. Therefore, it is necessary to align the round hole 16 and the pilot holes 45 and 55 concentrically.

  FIG. 2 is a cross-sectional view showing a detailed shape of the connector of FIG. The fixing tool 11 has a shape in which the pipe 14 penetrates the center of the rectangular plate 13, and the protruding height of the pipe 14 is substantially equal on both the front and back surfaces of the plate 13. In addition, the pipe 14 has an inner diameter that can accommodate the buffer shaft 21 with a margin, but the inner diameter is slightly narrowed to form a female screw 15 only at one end thereof. Further, two fixing tools 11 are required for one set of connecting tools, both of which have the same shape, one of which is turned upside down and arranged so that the female screws 15 are separated from each other, and the end faces of both pipes 14 are in contact with each other. Let

  The buffer shaft 21 has a round bar shape, and male screws 25 that are screwed into the female screw 15 of the fixing tool 11 are formed at both ends thereof. In addition, a square bar-like protrusion 26 is provided at the uppermost end of the buffer shaft 21. The protrusion 26 is used to prevent the shock-absorbing shaft 21 from rotating when the coupling tool is assembled, and the protrusion 26 is sandwiched with a tool as necessary. When assembling the coupling tool, the male screw 25 of the buffer shaft 21 is screwed into the female screw 15 of the fixing tool 11 and finally the two fixing tools 11 are brought into close contact with each other. To do. At this stage, there is a possibility that the fixing tool 11 rotates with respect to the buffer shaft 21, but when the lock nut 19 is screwed to both ends of the buffer shaft 21 and tightened, two fixing tools are connected via the buffer shaft 21. 11 adheres and a connector is completed.

  The embedment tool 31 has a columnar shape with a different outer diameter, and is embedded in a member such as the column 41 and the horizontal member 51 depicted in FIG. 1, and the large-diameter portion is referred to as a head 32. A hexagonal hole is provided in the center of the head 32 for fitting a tool during embedding, and an inner screw 38 to be screwed with the bolt 18 is formed in the back thereof. Further, a ridge 35 extending in a spiral shape is formed in a small-diameter portion ahead of the head 32.

  When the two fixing tools 11 are brought into close contact with the buffer shaft 21 and further loosened by tightening the lock nut 19, the connecting tool is completed as depicted in the upper right of FIG. Thereafter, the embedment tool 31 is embedded in each member, the connection tool is arranged in accordance with this, the plate 13 is brought into contact with the embedment tool 31, and the bolt 18 is directed from the round hole 16 of the plate 13 toward the inner screw 38 of the embedment tool 31. When the is inserted and tightened, the two members are integrated via the coupling tool.

  When an excessive load is applied in the direction in which the two members are separated after the two members are integrated by the connecting tool, the buffer shaft 21 is stretched as shown in the “stretched state” in the lower right of FIG. 2 to cause plastic deformation. As a result, the two fasteners 11 are pulled apart. Even in this state, due to the action of the lock nut 19 and the like, the two fixing tools 11 are integrated without loosening via the buffer shaft 21, and the connection between the members is maintained. Thereafter, when a load that compresses the two members is applied, the buffer shaft 21 is plastically deformed so as to meander as illustrated in the “crushed state” next to the two members, and the two fixing tools 11 are brought into close contact again. To do.

  FIG. 3 shows a state in which the pillar 41 and the horizontal member 51 of FIG. 1 are integrated, and the shape of the coupling tool after assembly. In the assembled connector, the two fixing tools 11 are in close contact with each other via the buffer shaft 21, and lock nuts 19 are attached to both ends of the buffer shaft 21. In addition, two sets of coupling tools are arranged on both sides of the upper portion of the column 41, and counteract bending moment acting on the members. In addition, the burying tool 31 that supports the connecting tool is embedded in the bottomed bottom holes 45 and 55, and it is not necessary to process holes penetrating both sides of the member. Therefore, no metal parts are exposed except at the boundary between the two members.

  The connecting device according to the present invention is assumed to be composed of the fixing device 11, the embedded device 31, the bolt 18, the buffer shaft 21, and the like. It is not necessarily limited to what was drawn in (2), and the arrangement of two members to be connected is also free. Therefore, the shape and the number of burial tools 31 may be determined flexibly according to various conditions such as load.

DESCRIPTION OF SYMBOLS 11 Fixing tool 13 Plate 14 Pipe 15 Female thread 16 Round hole 18 Bolt 19 Lock nut 21 Buffer shaft 25 Male screw 26 Protrusion 31 Embedding tool 32 Head 35 Projection line 38 Inner screw 41 Column (member)
43 Step 44 Center hole 45 Pilot hole 51 Horizontal member (member)
54 Center hole 55 Pilot hole

Claims (1)

A connecting tool used for integrating two adjacent members such as a pillar (41) and a horizontal member (51),
Two fasteners (11) disposed at the boundary of the two members;
An embedding tool (31) embedded in a pilot hole (45, 55) provided in each of the two members;
A bolt (18) for integrating the embedding tool (31) and the fixing tool (11);
A buffer shaft (21) for integrating the two fasteners (11);
Consists of
The fixing tool (11) has a structure in which a plate (13) in contact with the surface of the member and a pipe (14) penetrating the front and back surfaces of the plate (13) are integrated into the pipe (14). One end side of enters the central hole (44, 54) provided in the member,
The pilot holes (45, 55) are provided at positions that are covered with the plate (13), and the bolt (18) is inserted into a round hole (16) provided in the plate (13) and the embedded tool is provided. Screwed into the internal thread (38) of (31),
The buffer shaft (21) is disposed inside the pipe (14) and is provided with male screws (25) at both ends of the buffer shaft (21), and the male screw (25) is provided at one end of the pipe (14). 25) A female screw (15) to be screwed with is provided,
The two fixing tools (11) are arranged so that the female screw (15) is separated from each other, the end faces of both pipes (14) are brought into contact with each other, and the buffer shaft ( 21), and the fixing tool (11) is in close contact by screwing the female screw (15) and the male screw (25).

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