JP4871654B2 - Connector - Google Patents

Description

  The present invention relates to a connector used when fastening a member such as a beam in a wooden building.

  The climbing beams that constitute the skeleton of the roof in wooden construction are arranged so as to incline from the top of the building toward the eaves. At this time, the end surfaces of the climbing beams facing each other are in contact with each other at the top, and it is necessary to firmly fasten both members at the contact portion in order to ensure strength. For this reason, in this part, various kinds of hardware that is easy to ensure strength are often used instead of traditional fastening means such as nails and hoses, and an example is shown in FIG. Fig. 5 (A) is a perspective view showing the outline of the area around the climbing beam. The climbing beam is placed on the beam laid on the edge of the building, and the climbing beam rising from both sides is integrated at the center of the building. A triangular roof is formed. FIG. 5B is a longitudinal section showing an example of a fastening method for climbing beams which is currently widely used. In this way, the end faces of both climbing beams are in contact with each other, and V-shaped metal fittings are attached to the top and bottom surfaces near the boundary, and bolts and nuts are connected so as to connect the metal fittings on the top and bottom surfaces. Is attached.

  In addition, in recent wooden buildings, there is a demand to increase the strength of the beams and widen the intervals between the columns in order to secure a vast indoor space. There is also a demand for buildings that have a ceiling structure without a ceiling and that can visually recognize the skeletal structure including climbing beams. In the latter case, the middle of the climbing beam cannot be supported by a bundle, so it is necessary to ensure a higher strength.

When the end surfaces of beams such as climbing beams are brought into contact with each other and fastened, cracks may occur from the end surfaces of the beams over time, and the effectiveness of nails may be weakened and the strength may be reduced. Further, when a metal fitting and a bolt are used as shown in FIG. 5, a certain amount of clearance is required between the climbing beam and the bolt, and the integration between the climbing beam and the metal fitting becomes insufficient, and the rigidity is likely to decrease. . From such a background, there is a demand for a connector that can maintain stable rigidity over a long period of time. The applicant of the present application has filed the following patent application regarding the connecting device for the climbing beam, but the application has beams (purlins) between the facing climbing beams, which is different from the form shown in FIG. Yes. Therefore, the above problem does not occur.
JP 2004-52464 A

  When installing the climbing beams, first place the climbing beams temporarily in an empty space on the site, then fasten the left and right climbing beams using the method shown in Fig. 5 (B), and then lift them with a crane. In general, it is fixed at a predetermined position. However, when a vacant space cannot be secured in a densely populated area or the like, it is difficult to work in such a procedure, and some measures are required.

  The present invention was developed on the basis of such circumstances, and in wooden construction, when end faces of members such as climbing beams are brought into contact with each other and fastened, the strength of the members can be prevented from being lowered and high reliability can be maintained. The purpose is to provide a connector with excellent workability during construction.

  The invention according to claim 1 for solving the above-mentioned problem is a connector for connecting the right and left end surfaces of the first member and the second member by butting them together, and is disposed across the upper surfaces of both members. And an upper fitting having an upper hole at an appropriate interval, a lower fitting arranged across the bottom surfaces of both members and having a lower hole corresponding to the upper hole, and the upper hole and the lower hole so as to face each other. A lag screw having spiral blades embedded in the first member and the second member, and a mutual longitudinal groove on the end face of the first member and the second member so as to face the upper hole and the lower hole A tie rod inserted into the formed through-hole, and a tightening member for pressing the upper and lower metal fittings to the first member and the second member by a lag screw and a tie rod through the upper hole and the lower hole. To have A consolidated tool for the butterflies.

  The first member and the second member are both rod-like timbers fastened according to the present invention and serve as skeletons for wooden buildings including climbing beams. However, the names of the first member and the second member are assigned for convenience, and there is no difference in function or shape. The present invention can be applied not only to the case where both members are in contact with each other at an angle of intersection like the top of the climbing beam but also to the case where both members are aligned.

  The upper metal fitting and the lower metal fitting are rod-shaped and arranged so as to straddle both the first member and the second member, the upper metal fitting is in contact with the upper surface of both members, and the lower metal fitting is in contact with the bottom surface on the opposite side. Yes. Here, the upper surface means an upward surface among the surfaces extending in the longitudinal direction of the member, but is not necessarily limited to a horizontal plane. The other bottom surface is a surface facing the top surface. Therefore, when both members have an angle of intersection like a climbing beam, the upper metal fitting and the lower metal fitting are both bent according to the angle of intersection. The upper metal fitting and the lower metal fitting may be arranged along the surface of the member, but a groove may be processed and embedded in the surface of the member. The upper hole is a hole penetrating the front and back of the upper metal fitting, and it is necessary to form at least one on each of the first member side and the second member side, and the lower hole is formed at a position concentric with the upper hole. There is a need.

  A lag screw is a cylindrical rod, and a spiral blade is surrounded by the lag screw. The spiral blade digs into the member, and both are integrated. Further, it is driven so as to be orthogonal to the axis of the member and is arranged to be sandwiched between the upper plate and the lower plate. In the present invention, it is necessary to use at least one lag screw for both the first member and the second member, and at least two lag screws are used at one fastening portion. The lag screw embedded in the member is integrated with the upper metal fitting and the lower metal fitting by a fastening member such as a bolt.

  The tie rod contacts and integrates both the upper metal fitting and the lower metal fitting, and has a role to counteract a load that attempts to separate the two metal fittings. Since this tie rod is disposed on the contact surface between the first member and the second member, it is necessary to form semicircular longitudinal grooves extending vertically on the end surfaces of both members, and both longitudinal grooves are integrated. Thus, a through hole having a circular cross section is formed. Note that the tie rod is an integral part of the upper metal fitting and the lower metal fitting, and does not need to contact the first member and the second member. Similar to the lag screw, the tie rod is integrated with the upper metal fitting and the lower metal fitting by a fastening member such as a bolt.

  By comprising in this way, it can prevent that the wood fiber of the member end surface vicinity is torn, and intensity | strength is maintained. Moreover, the upper metal fitting and the lower metal fitting are firmly integrated by the lag screw and the tie rod, and can cope with various loads. Note that at least one lag screw needs to be used for both members, and a plurality of lag screws are often used depending on the strength. In addition, as for the upper metal fitting and the lower metal fitting, only one set is used for one fastening portion. However, when the cross-sectional area of the member is extremely large, a plurality of sets can be used side by side.

  As in the first aspect of the invention, in addition to driving lag screws into both members and integrating them with the upper metal fitting and the lower metal fitting, a tie rod that integrates the upper metal fitting and the lower metal fitting at the contact surface of both members is used. By doing so, the spiral blades of the lag screw pierce the two members, restraining the movement of the wood fiber, preventing the occurrence of cracks, and maintaining the strength for a long period of time. In addition, when the upper and lower brackets are fastened with bolts as in the past, the rigidity has been reduced due to gaps around the bolts, but this problem can also be resolved by using lag screws as in the present invention. Is done. Moreover, since the upper metal fitting and the lower metal fitting are also integrated by the tie rod, the strength can be maintained against this even when a load is applied to cause the metal fittings to be separated by a bending moment. In addition, since the lag screw and tie rod are structured to be integrated with both brackets by bolts or other fastening members, the installation of the first member is completed after the installation of the first member, and then both the fastening members are used. Can be integrated, it is not necessary to fasten the members on the ground surface, and the workability is excellent.

  FIG. 1 is a state in which a member is fastened using a connector according to the present invention, FIG. 1 (A) is a perspective view showing an appearance, and FIG. 1 (B) is a longitudinal sectional view of a central portion of FIG. 1 (A). It is. FIG. 1 shows the vicinity of the top of the roof where the climbing beams arranged so as to face each other. For identification, the climbing beam on the right side of the figure is the first member F, and the climbing beam on the left side of the figure is the second member S. It is said. Both members F and S are formed with a strip-like upper groove 31 extending in the longitudinal direction, and the upper metal fitting 11 is embedded therein. In addition, the width | variety of the upper metal fitting 11 and the upper groove | channel 31 is equal, and the upper metal fitting 11 cannot move to the width direction. The upper metal fitting 11 is made of a steel square bar, is V-shaped bent at the center to contact both climbing beams, and has a counterbore hole for inserting the fastening members (bolts) 27 and 28. 15 are formed in total. Among these, the bolt 28 located at the center of the upper metal fitting 11 is used for connecting the tie rod 25 embedded therein, and the other four bolts 27 are used for connecting the lag screw 21. Has been. In addition, the lower metal fitting 12 shown in FIG. 1A is embedded in the lower groove 32 originally formed on the bottom surfaces of the members F and S.

  As shown in FIG. 1B, two lag screws 21 are driven into the first member F and the second member S. The lag screw 21 has a columnar appearance, and spiral blades 22 are formed on the side peripheral surface. When the lag screw 21 is pierced into the member, the movement of the wood fibers is restricted, and deformation and cracking are prevented. Further, in order to embed the upper metal fitting 11 and the lower metal fitting 12, an upper groove 31 is formed on the upper surface of both members F and S, and a lower groove 32 is formed on the bottom surface along the inclined direction. Furthermore, the end face of the lag screw 21 embedded in both the members F and S coincides with the bottoms of the upper groove 31 and the lower groove 32, and is in surface contact with both metal fittings 11 and 12. Female screws 24 for screwing the bolts 27 are formed on both end faces of the lag screw 21, and the upper holes 13 for inserting the bolts 27 and 28 are inserted into the upper metal fitting 11 and the lower metal fitting 12. A counterbore 14 and a counterbore hole 15 that accommodates the heads of the bolts 27 and 28 are formed. By inserting and tightening the bolts 27 and 28 from the outside, the first member F and the second member S Are integrated.

  The tie rod 25 is a simple round bar, and is inserted into a through hole 35 having a circular cross section formed by a combination of longitudinal grooves 33 having a semicircular cross section formed on the contact surfaces of both members F and S. Further, the upper metal member 11 and the lower metal member 12 are also provided with a horizontal surface in the vicinity of the center so as to be in surface contact with the tie rod 25. The contact surfaces of both members F and S have a long distance from the lag screw 21, so that an excessive load may be applied to one of the upper metal member 11 or the lower metal member 12. Will improve.

  2 supplements FIG. 1, FIG. 2 (A) shows the outer shape of the upper metal fitting 11, FIG. 2 (B) shows the processed shape near the end surfaces of the first member F and the second member S, and FIG. 2 (C) shows the outer shape of the lag screw 21. The upper metal fitting 11 is formed by bending a rod-shaped steel material, and the upper hole 13 and the counterbore hole 15 are processed in order to insert the bolts 27 and 28. Further, as shown in FIG. 2B, both the first member F and the second member S need to be processed in advance with an upper groove 31 and a lower groove 32 extending in the longitudinal direction on the upper surface and the bottom surface, and both end surfaces. A vertical groove 33 having a semicircular cross section is formed. The vertical groove 33 becomes a through-hole 35 having a circular cross section penetrating vertically with both end surfaces in contact with each other. The lag screw 21 generally has a diameter of about 30 mm, and the prepared hole 34 is processed in advance as shown in the figure. In addition, as shown in FIG. 2 (C), spiral blades 22 are formed on the side peripheral surface of the lag screw 21, and hexagonal heads 23 are formed on both end surfaces to hang tools. A female screw 24 for receiving the bolt 27 is formed at the center.

  FIGS. 3A and 3B show shapes near the end surfaces of the first member F and the second member S, FIG. 3A is a plan view, and FIG. 3B is a central longitudinal sectional view. Thus, in addition to the upper groove 31 and the lower groove 32, both the members F and S need to process a semicircular vertical groove 33 on the end face in advance. Of these, the longitudinal groove 33 preferably has a cross section in which the tie rod 25 can be accommodated with a margin. The operation of embedding the lag screw 21 in the prepared hole 34 is preferably performed at the lumbering stage from the viewpoint of workability.

  FIG. 4 is an embodiment of the present invention, FIG. 4 (A) is a perspective view showing a method of integrating the first member F and the second member S during construction, and FIG. 4 (B) is not a climbing beam. It is sectional drawing at the time of fastening a general beam. FIG. 4 (A) shows the skeleton structure around the climbing beam that constitutes the roof. The upper end surface of the column is an inclined surface, and the lower end surfaces of the first member F and the second member S are in contact with this. It is a form to do. Therefore, the horizontally extending beams are arranged so as to connect adjacent columns. Further, as shown in the figure, the first member F on the right rear side is in a cantilever state in which only the lower end is fixed with a pillar, and the lower metal fitting 12 is fixed in advance below the upper end surface of this member. . The second member S floating in the air is in the process of moving to the installation position, and the upper metal fitting 11 is fixed above the upper end surface of this member. When the second member S is gradually lowered in this state, the lower end surface comes into contact with the pillar and the upper metal fitting 11 of the second member S enters the upper groove 31 at the top of the first member F. Thereafter, when the bolts 27 and 28 are fastened, the first member F and the second member S are integrated. The coupling tool is used not only for fastening the first member F and the second member S but also for fastening the column and the first member F, and the column and the second member S. Next, FIG. 4B shows a case where a general beam is fastened in a straight line, and the configuration is the same as that in FIG. 1B except that the upper metal fitting 11 and the lower metal fitting 12 are in the form of straight bars.

It is the state which fastened the member using the connecting tool by the present invention, (A) is a perspective view showing appearance, and (B) is the central section longitudinal section of (A). It is a perspective view which supplements FIG. 1, (A) is the outer shape of an upper metal fitting, (B) is the process shape of the end surface vicinity of a 1st member and a 2nd member, (C) is the outer shape of a lag screw. Show. The shape of the end surface vicinity of the 1st member and the 2nd member is shown, (A) is a top view, (B) is a center longitudinal cross-sectional view. In embodiment example of this invention, (A) is a perspective view which shows the construction method which integrates a 1st member and a 2nd member at the time of construction, (B) is a cross section at the time of fastening the general beam which is not a climbing beam FIG. FIG. 2 shows a conventionally used climbing beam fastener, (A) is a perspective view showing the outline of the climbing beam periphery, and (B) shows an example of a climbing beam fastening method that is currently widely used. It is a longitudinal section.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Upper metal fitting 12 Lower metal fitting 13 Upper hole 14 Lower hole 15 Counterbore hole 21 Lag screw 22 Spiral blade 23 Head 24 Female screw 25 Tie rod 26 Female screw 27 Tightening member (bolt)
28 Tightening members (bolts)
31 Upper groove 32 Lower groove 33 Vertical groove 34 Lower hole 35 Through hole F First member S Second member

Claims (1)

A coupling tool for butting the right and left end faces of the first member (F) and the second member (S) together,
An upper metal fitting (11) disposed over the upper surfaces of both members (F, S) and having upper holes (13) at appropriate intervals;
A lower metal fitting (12) disposed across the bottom surfaces of both members (F, S) and having a lower hole (14) corresponding to the upper hole (13);
A lag screw (21) provided with a spiral blade (22) embedded in the first member (F) and the second member (S) so as to face the upper hole (13) and the lower hole (14); ,
Through-holes formed by mutual longitudinal grooves (33) of the butted end surfaces of the first member (F) and the second member (S) so as to face the upper hole (13) and the lower hole (14) A tie rod (25) inserted into (35);
The upper metal fitting (11) and the lower metal fitting (12) are connected to the first member (F) and the second member (12) by the lag screw (21) and the tie rod (25) through the upper hole (13) and the lower hole (14). And a fastening member (27, 28) for press-contacting to S).

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