JP4649303B2 - Pillar fasteners - Google Patents

Description

  The present invention relates to a column fastener used for constructing one long column by joining the end faces of two columns.

  Wooden buildings are mainly single-story or two-story buildings due to problems such as legal restrictions and strength, and buildings with three or more stories are generally reinforced concrete. Therefore, in a densely populated area, etc., when building a three-story house for effective use of space, a reinforced concrete structure is common, but there is a demand for adopting a wooden structure with excellent comfort and texture. . Recently, three-story wooden buildings are gradually spreading due to deregulation and technological innovation, and this trend is expected to continue mainly in urban areas.

  Three-story wooden buildings require a long pillar that penetrates from the base to the roof due to the increase in height, but if you try to construct this pillar with a single piece of wood, it will be a nonstandard length , Problems due to length occur at various stages, from securing raw wood to lumbering and carrying it to the site. Particularly in densely populated areas where demand for three-story buildings is high, it is often difficult to carry long pillars with narrow roads. Therefore, there are cases where a plurality of pillars are added using a beam erected in the middle layer such as under the floor on the second floor, but this method complicates the structure for firmly fixing the pillars, and the number of members and There is a problem that work time increases.

Therefore, if general-purpose wood can be combined and a long pillar that penetrates from the base to the ceiling can be constructed locally, the above problems can be solved, but the pillar has a significant impact on the strength of the building, and several tens of There should be no deformation or loss of strength during the year. In addition, when performing the column connection work on site, it is preferable that it can be completed easily in a short time. In addition, in order to prevent interference with other members adjacent to the column, there is no protrusion at the column connection part. It is preferable that no object is present. In addition, about the structure which couple | bonds the wood mainly used for a building use, prior arts, such as the following patent document, are disclosed.
JP-A-8-105124

  The present invention was developed based on such a situation, and is used to construct one long column suitable for a three-story wooden building by joining the end faces of two columns. The purpose is to provide pillar fasteners.

  The invention according to claim 1 for solving the above-described problem is a column fastener for connecting two column end surfaces to each other, and is a mooring shaft embedded in a pilot hole formed in the end surface of the first column. And a hollow shaft embedded in a through hole connecting the window portion and the end surface formed by cutting out the side surface of the second column, and a stud screwed into the anchoring shaft and penetrating through the inside of the hollow shaft A bolt and a nut that is screwed to a stud bolt protruding from the window; the mooring shaft has a spiral ridge that pierces the first pillar formed on a side peripheral surface; and the stud bolt is screwed A female thread for fitting is formed on one end surface, the hollow shaft has a spiral ridge that pierces the second pillar formed on a side circumferential surface, and an inner hole for inserting the stud bolt is formed And said The tad bolt is threaded to the female screw and the nut so that male screws are formed on both sides. This is a column fastener characterized by integrating the first column and the second column by closely contacting each other with a stud bolt and a nut.

  In the present invention, the end faces of two pillars are brought into contact with each other, and both are integrated to construct one pillar. The first pillar and the second pillar are individual pillars before being integrated. These are names given for the sake of convenience, all of which point to a piece of wood made of wood in a rectangular cross section, and the cross-sectional shapes of the columns are preferably the same. The pilot hole formed in the end surface of the first column refers to a hole cut in a circular cross section along the longitudinal direction of the column from the end surface on the side in contact with the second column. Since it is embedded, its depth may be sufficient to accommodate the entire mooring shaft.

  Also, the window formed by cutting out the side surface of the second pillar refers to a place where the point moved in the longitudinal direction by a predetermined distance from the end face of the second pillar is cut into a rectangular cross section, and the through hole is The hole between the end surface of the second column and the window portion is a hole cut in a circular cross section along the longitudinal direction of the column, and the total length of the through hole must be equal to the total length of the hollow shaft. . The positions of the through holes and the pilot holes of the first column are adjusted so that they are aligned with each other when both columns are brought into contact with each other.

  The mooring shaft is a metal rod embedded in the pilot hole of the first pillar, and the cross section is a circle having the same diameter as the pilot hole. The spiral ridge is a radial direction from the side peripheral surface of the mooring shaft. It is preferable that the protruding portion extending in a spiral manner is wound around the entire side peripheral surface, and has an appearance similar to a screw nail. Therefore, when the end surface of the mooring shaft is brought into contact with the pilot hole to be rotated, the spiral ridges pierce the wood of the outer periphery of the pilot hole, and the entire thrust is embedded in the pilot hole by this propulsive force. When the spiral ridges are pierced into the wood, a large friction is generated between them, and the mooring shaft is fixed in an immobile state. When embedding the mooring shaft, it is necessary to finally match the end surface with the end surface of the first column. In addition, the female screw is formed on the end face on the side exposed to the outside when embedded in the first member.

  The hollow shaft is a metal tube embedded in a through hole formed between the window portion and the end face in the second pillar, and its cross section is based on a circle with the same diameter as the pilot hole, with a stud at the center. An inner hole through which the bolt can be passed with a margin is formed. Moreover, about the spiral protrusion, the thing similar to a mooring shaft is formed, and a hollow shaft is fixed in a fixed state in a 2nd pillar. Since the total length of the hollow shaft is equal to the total length of the through hole, one end of the hollow shaft coincides with the end face of the second column and the other end coincides with the wall surface of the window portion when the embedding is completed. Therefore, at the stage where the end surfaces of the first column and the second column are brought into contact with each other, the end surfaces of the anchoring shaft and the hollow shaft are also brought into contact with each other.

  Stud bolts are formed with male threads on both sides of a cylindrical rod, and have the role of integrating the first and second pillars, one end of the anchoring shaft embedded in the pilot hole of the first pillar. The other end is screwed into the female screw, and the other end is projected through the hollow shaft to the window portion and the nut is screwed. As a result, the hollow shaft is pressed against the mooring shaft by the nut, and finally the first column and the second column are integrated. Therefore, the total length of the stud bolt needs to be longer than the total length of the hollow shaft.

  By configuring in this way, after completion, the compressive load that is constantly acting on the column is transmitted through the contact surface between the mooring shaft and the hollow shaft. In addition to being able to transmit the load stably, both shafts are integrated with the column by spiral ridges, and the load acting on the shaft is distributed over a wide range via the spiral ridges, so the local load on the column Can be prevented from deforming without acting. Moreover, it can be received by the shearing force of the stud bolt even with respect to a load in the horizontal direction, and has sufficient strength.

  As in the first aspect of the invention, the anchoring shaft and the hollow shaft are embedded in the end faces of the respective columns, and the stud bolts inserted into the hollow shafts are used to press the hollow shaft against the anchoring shafts, Since the compressive load acting on the column can be distributed over a wide range to both columns via the helical ridges of the mooring shaft and hollow shaft, an excessive load does not act on the contact surface of the column, and the wood Deformation and cracking can be prevented, and the integrity of the pillar can be maintained for a long time. Therefore, since the pillar integrated by this invention functions as one pillar substantially, the skeleton structure of a building can be simplified, the increase in the number of members and working time can be suppressed, and it is excellent in terms of cost. In addition, the column integration work can be done by temporarily placing the stud bolt into the hollow shaft's bore, and it is not necessary to tighten the nut at the same time, such as a crane used to install the column. Can be operated efficiently. In addition, since all of the components according to the present invention are embedded in the column, they can be handled in the same manner as a conventional column without interference with other members.

  FIG. 1 is a perspective view showing a configuration of a column fastener according to the present invention. In order to integrate the upper end surface of the first column 1 drawn on the lower side and the lower end surface of the second column 2 drawn on the upper side, the upper end surface of the first column 1 was cut vertically. Two sets of prepared holes 11 are machined at both ends. The pilot hole 11 is machined to such a depth that the anchoring shaft 12 can be completely buried, and the diameter thereof is equal to the diameter of the trunk portion 13 of the anchoring shaft 12. The mooring shaft 12 embedded in the pilot hole 11 is formed with a spiral ridge 15 projecting in the radial direction on the side peripheral surface of the barrel portion 13 on the basis of the barrel portion 13 having a perfect circular cross section. In addition, a hexagonal head 14 is formed above the body 13 to hang a tool, and a female screw 16 is machined vertically downward at the center of the head 14.

  One second pillar 2 is formed with a pair of windows 32 on the side surface. This window portion 32 is obtained by cutting the side surface of the second pillar 2 into a rectangular cross section. By this, the cross sectional area of the second pillar 2 is reduced. It has become. A through hole 21 is formed in the lower end surface of the second pillar 2 at a position corresponding to the pilot hole 11 of the first pillar 1. In addition, about the window part 32, it is necessary to adjust a process position so that the full length of the through-hole 21 and the full length of the hollow shaft 22 may become equal. Similarly to the mooring shaft 12, the hollow shaft 22 is based on a cylindrical section 23 having a perfect circular cross section equal to the diameter of the through-hole 21, and spiral ridges 25 projecting in the radial direction are almost formed on the side peripheral surface of the cylindrical section 23. A hexagonal head portion 24 is formed below the body portion 23 so as to hang a tool. In addition, the hollow shaft 22 has an inner hole 26 cut into a circular cross section along the central axis and penetrating up and down, which is different from the mooring shaft 12.

  The stud bolt 31 is formed by processing male screws 35 and 36 on both sides of a round bar. One end of the stud bolt 31 is screwed into the female screw 16 of the mooring shaft 12, and the other end penetrates the inner hole 26 of the hollow shaft 22. The nut 34 is screwed with the washer 33 interposed therebetween. Therefore, it is desirable that the diameter of the inner hole 26 is larger than the diameter of the stud bolt 31 and that there is a gap of about several millimeters between them. A series of fasteners composed of the mooring shaft 12 and the like are arranged in two sets on the left and right in the case of this figure. In addition, a fixing pin 42 is used at the center of the end faces of both columns 1 and 2 in order to increase the strength against shearing force. This fixing pin 42 is embedded in a pin hole 41 formed in both pillars 1 and 2, and the diameters of the fixing pin 42 and the pin hole 41 are equal, and only the shearing force is received.

  FIG. 2 shows a method of processing both pillars 1 and 2 required when using the fastener according to the present invention. FIG. 2A is a cross-sectional view taken along the line AA in FIG. ) Is a view on arrow B in FIG. As shown in FIG. 2A, it is necessary to process the prepared hole 11 in the first pillar 1 from the upper end surface downward, and in the second pillar 2, the window part 32 is processed, and then the window part 32 is processed. A through hole 21 that connects the end face to the end face is also necessary. Since such pilot holes 11 and through holes 21 need to be formed accurately at predetermined positions, it is desirable to process them collectively at the time of lumbering. Furthermore, embedding of the mooring shaft 12 into the first column 1 and embedding of the hollow shaft 22 into the second column 2 are difficult to perform manually, so it is desirable to perform them all at the time of lumbering. The mooring shaft 12 is embedded by bringing the tip of the mooring shaft 12 into contact with the inlet of the pilot hole 11 and then turning the entire head 14 with a tool to pierce the spiral ridge 15 into the wood. Then, the embedding is proceeded with the thrust by the spiral ridge 15. As a result, a large friction is generated between the spiral protrusion 15 and the wood, so that the mooring shaft 12 is firmly fixed in the first column 1. This also applies to the hollow shaft 22. In addition, as shown in FIG. 2 (B), the window 32 is exposed on the side surface of the second pillar 2, but this reduces the cross-sectional area of the second pillar 2, so the size of the window 32 is necessary. Minimized. From the viewpoint of aesthetics, it is possible to close the window 32 with a piece of wood or the like.

  FIG. 3 is a perspective view showing a state immediately before the first column 1 and the second column 2 are integrated using the present invention. The mooring shaft 12 and the hollow shaft 22 are already attached to the respective columns 1 and 2. Embedded. At this time, it is necessary to adjust the embedding depth of the end surface of the mooring shaft 12 so that a step difference from the end surface of the first column 1 does not occur. Similarly, the end surface of the hollow shaft 22 has a step difference from the end surface of the second column 2. It is necessary to adjust the embedding depth so as not to occur. In the next stage, the male screw 35 of the stud bolt 31 is screwed into the female screw 16 of the mooring shaft 12, and the operation is continued until the stud bolt 31 is firmly fixed. After that, when all the stud bolts 31 have been installed and the installation of the first pillar 1 is finished, the second pillar 2 is moved down directly above the first pillar 1 with a crane or the like and then the second pillar 2 is lowered. The stud bolt 31 is inserted into the inner hole 26 of the hollow shaft 22, and the stud bolt 31 penetrates the hollow shaft 22, so that the temporary arrangement of the second pillar 2 is completed. At this time, the male screw 36 above the stud bolt 31 passes through the hollow shaft 22 and reaches the window portion 32. In actual construction, the process until the stud bolt 31 is screwed into the female thread 16 is preferably performed in the factory, and the first pillar 1 and the second pillar 2 are divided and transported to the construction site. Then, after the installation of the first pillar 1 is completed, the temporary arrangement and the integration work of the second pillar 2 are performed.

  FIG. 4 is a cross-sectional view showing a state in which the first pillar 1 and the second pillar 2 are integrated according to the present invention, and the mooring shaft 12 and the hollow shaft 22 are fastened by a stud bolt 31 and a nut 34. . Although the nut 34 is not screwed into the stud bolt 31 drawn on the right side of the figure, the state finally becomes the same as that drawn on the left side. The upper end surface of the mooring shaft 12 embedded in the first column 1 is not stepped from the upper end surface of the first column 1, and the spiral protrusion 15 is stuck into the first column 1, and acts on the mooring shaft 12. The vertical load to be distributed is distributed over a wide range via the spiral ridges 15 and the concentration of the load does not occur, so that the aged deformation of the first pillar 1 can be prevented. Since the lower end surface of one hollow shaft 22 is not stepped from the lower end surface of the second pillar 2 and the entire length of the through hole 21 is equal to the entire length of the hollow shaft 22, the upper end surface of the hollow shaft 22 is There is no step with the bottom. Therefore, at the contact surface between the first column 1 and the second column 2, the end surfaces of the mooring shaft 12 and the hollow shaft 22 are also in surface contact with each other, and both the shafts 12 and 22 are made of metal and have extremely high rigidity. Is transmitted mainly through both shafts 12,22.

  The lower end of the stud bolt 31 is screwed with the female screw 16 of the mooring shaft 12, and the upper end thereof is screwed with the nut 34. The nut 34 presses the hollow shaft 22 via the washer 33, whereby the mooring shaft 12 and the hollow shaft 22 are integrated. Although the washer 33 is not an indispensable element, it has a role to relieve stress acting on the upper end surface of the hollow shaft 22 and can prevent the nut 34 from loosening over time. Further, the window portion 32 has such a size that a nut 34 and a washer 33 can be attached and a tool can be inserted. In addition, a fixing pin 42 is inserted in the center of the columns 1 and 2 in order to improve the strength against shearing force. In addition, in this figure, although the 1st pillar 1 is drawn below, it is not necessarily limited to this, It is also possible to invert and use a vertical relationship.

  FIG. 5 is a side view showing an example of a skeleton structure of a wooden building to which the present invention is applied. Even in the three-story wooden building as shown in this figure, there is no change in the structure in which the foundation concrete 51 is placed on the ground plane and the foundation 52 is laid on the upper surface. It is not possible to connect up to the girder 53 just below the roof. Therefore, the lower first column 1 and the upper second column 2 are fastened using the present invention at a position indicated by a one-dot chain line in the drawing. This has the same effect as a long column reaching from the base 52 to the vicinity of the roof. As a result, the skeleton structure is simplified. The intermediate beam 54 that supports the floor of each floor is supported by the side surfaces of the columns 1 and 2.

It is a perspective view which shows the structure of the fastener of the pillar by this invention. It is a figure which shows the processing method of both pillars required when using the fastener by this invention, (A) is AA sectional drawing of FIG. 1, (B) is B arrow view of FIG. is there. It is a perspective view which shows the state just before integrating a 1st pillar and a 2nd pillar using this invention. It is sectional drawing which shows the state which the 1st pillar and the 2nd pillar were integrated by this invention. It is a side view which shows the example of the skeleton structure of the wooden building to which this invention is applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st pillar 2 2nd pillar 11 Pilot hole 12 Mooring shaft 13 Trunk part 14 Head 15 Spiral protrusion 16 Female screw 21 Through hole 22 Hollow shaft 23 Trunk part 24 Head 25 Spiral protrusion 26 Medium hole 31 Stud bolt 32 Window Portion 33 Washer 34 Nut 35 Male thread 36 Male thread 41 Pin hole 42 Fixing pin 51 Foundation concrete 52 Base 53 Large beam 54 Middle beam

Claims (1)

A fastener for a pillar that joins the end faces of two pillars (1, 2),
A mooring shaft (12) embedded in a pilot hole (11) formed in the end face of the first column (1);
A hollow shaft (22) embedded in a through hole (21) connecting the window (32) formed by cutting out the side surface of the second pillar (2) and the end surface;
A stud bolt (31) threadedly engaged with the mooring shaft (12) and penetrating through the hollow shaft (22);
A nut (34) screwed into a stud bolt (31) protruding from the window (32);
Consisting of
The mooring shaft (12) has a spiral protrusion (15) that pierces the first pillar (1) formed on the side peripheral surface, and an internal thread (16) for screwing the stud bolt (31) on one end surface. Is formed,
The hollow shaft (22) is formed with a spiral protrusion (25) that pierces the second pillar (2) on the side peripheral surface, and an inner hole (26) through which the stud bolt (31) is inserted. And
Since the stud bolt (31) is screwed into the female screw (16) and the nut (34), male screws (35, 36) are formed on both sides,
A mooring shaft (12) fixed to the first column (1) by the spiral ridge (15) and a hollow shaft (22) fixed to the second column (2) by the spiral ridge (25) are connected to the stud bolt ( 31) A fastener for a pillar, wherein the first pillar (1) and the second pillar (2) are integrated by being brought into close contact with each other by a nut (34).

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