JPH02108742A - Method of joining beams in wooden building - Google Patents

Abstract

PURPOSE:To enhance the strength of an joined part by fitting a cylindrical body projected from a joint fixture in an annular groove in a joining side beam, and by fastening a tension bolt for coupling a joined side beam with the joining side beam. CONSTITUTION:A cylindrical body 4 projected from a joint fixture A is fitted in an annular groove 17 in a joining side beam W1, and then the fixture A is secured to the beam W1 by means of screws 24. A bolt thread-engaging fixture B is fitted in a joined side beam W2. Further, a tension bolt C is set in such a way that the bolt C passes through a bolt shank insertion hole 28 in the beam W2 and then through a bolt insertion hole 5 in the fixture A and a cylindrical hole 23 in the fixture B, and the threaded forward end part 11 of the bolt C is threadedly engaged in a threaded hole 10 in the fixture B. Further, when the bolt C is rotated, the beam W1 is pulled toward the beam W2 until the joint faces 163, 25 of both beams W1, W2 are made into press- contact with each other, and screws 30 are introduced through screw holes in a flange part 1 of the fixture A.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method for joining beams in a wooden building, in which the side beams to be joined and the side beams to be joined are joined with their upper surfaces being in the same plane. be.

(Prior Art) Conventionally, when joining the side beams to be joined and the side beams to be joined with their upper surfaces being on the same plane, the sloped side wall part ( 101) to the joining side beam material (W
, ') provided on the joint surface (102) of the side wall plate part (10
), the lower surface (105) of the upper flange portion (104) is flush with the upper surface (106) of the side beam member (W2') to be joined, And the lower flange part (107) is buried so that it is press-fitted into the joint side beam material (W,''), and the side wall plate part (101) and the joint side beam material (W, '') are buried.
w, ') to bis((108), (ios)...
and attach the joint fittings (A,
゛) is fixed, and the lower surface (105) of the upper flange part 04) is fixed.
) on the top surface (106
), the joint surface (102) of the joint side beam material (w,')
With the joining surface (109) of the beam material to be joined (W2') pressed together, the upper flange part (104) and the beam material to be joined (w2') are connected by screws (110), (110)...・・・・・・
A method has been used in which the two beam members (W, '') and (W2') are fixed together and joined together.

(Problems to be Solved by the Invention) However, in the method of joining beams according to the prior art described above, the lower flange part 07) of the joining fitting (A゛) is pressed onto the joining side beam (W,'). When the beam is inserted, or when an overload is applied to the beam on the joining side (W+') after the beam is joined, cracks (P) may occur as shown in the diagram, resulting in problems such as weakening of the joint. There was a point.

(Means for Solving the Problems) The present invention is aimed at solving these problems, and it is possible to connect a cylindrical body protruding from the side wall plate portion of the joint fitting to the joint surface of the joint side beam material. In addition, the fitting is fitted into the annular groove provided corresponding to the cylindrical body to fix the joint to the joint side beam, and the bolt is tightened to connect the joint side beam and the joint side beam. This is a method of joining beams in which the joint surfaces of both beams are pressed together, the beams on the side to be joined and the joining fittings are fixed, and the beams on the side to be joined are joined to the beams on the side to be joined. By connecting the joining side beam material and the joining metal fittings, the load due to overload in an unspecified direction on the collected timber is distributed to the peripheral wall of the cylindrical body, preventing a large local load from being applied. In addition, the tension is used to tighten bolts and bring the joint surfaces of both beam members into close contact, thereby strengthening the joint between the beam members.

The present invention will be explained below with reference to embodiments shown in the figures.
Figures 3 to 3 respectively show a joint fitting (A), a bolt screw metal fitting (B), and a bolt (C) of the present invention.
From Figure 1, the upper part of the rectangular metal plate is bent at right angles to form the flange part (1) with an appropriate thickness. The side wall (
3) In the center, there is a cylindrical body made of metal with the required height for the expedition (4
), and drill a bolt shaft insertion hole (5) in the side wall plate (2) on the center line of the cylindrical body (4), and a screw insertion hole (6) in the lower part of the cylindrical body. together with the flange part (1
) are formed with mounting holes (7), (7), etc. to form a joining fitting (A).

From Fig. 2, the bolt screw fitting (B) has a suitably long cylindrical metal fitting main body (8), and the outer periphery of one side edge of the metal fitting body (8) is attached to the outer periphery of the outward-facing flange (
9), and screw a screw into the other side inner wall surface to make a screw hole (10).
form.

Fig. 3 shows a screw hole (10) of the metal fitting (B) on one side, which has a diameter that fits freely into the bolt screw metal fitting (B).
A bolt shaft of appropriate length (1
The attraction consisting of 2) is a bolt (C).

Next, the method of joining beam materials according to the present invention will be explained with reference to the embodiments shown in FIGS. 4 to 6.

From Fig. 5, the joint surface (13) of the joint side beam material (Wl) has a width of the side wall plate part (2) of the joint fitting (A) from the lower surface (14) of the flange part (1). A recessed portion (14) of a size that corresponds to the height and has a depth corresponding to the plate thickness and into which the side wall plate portion (2) can be fitted with some margin,
The cylindrical body (4) of the joining metal fitting (A) has a notch extending downward from the upper edge (15) of the joining side beam material (Wl) and has a central part 1 of the bottom surface (16) of the concave portion (14). ) into which the annular groove (17) is slightly deeper than the height of the cylindrical body (4).
An annular groove (1) is provided at the bottom (16) of the concave portion (14).
7) On the inside, an outward-facing flange (9) of the bolt threaded metal fitting (B) having a center on the axial center line of the groove (17);
A stepped seat hole (18) for fitting the flange is provided with a depth corresponding to the thickness of the flange (9) and a diameter slightly larger than that of the flange (9).
18) has a metal fitting body insertion hole (19) into which the metal fitting body (8) of the bolt screw metal fitting (B) is loosely fitted, and the bolt has a dimension slightly deeper than the overall length of the screw metal fitting (B). A screw fitting insertion hole (20) is drilled, and adhesive (22) is applied to the outer peripheral surface (21) of the metal fitting main body (8) in the bolt screw fitting insertion hole (20) as shown in Fig. 6. Insert the bolt threading alloy tool (B) coated with the above with the collar part (9) buried in the stepped seat hole (18), and attach the bolt fitting alloy tool (B) to the joint side beam material (Wl). Fix the joint fitting (A) with the 7-run part (1) facing upwards, and the cylindrical body (4) facing the joining side beam material (Wl) side, and insert the annular groove (
17), insert the cylindrical body (4) into the recessed part (14), and insert the side wall plate (2) into the recessed part (14) to connect the bolt insertion hole (5) of the joint fitting (A) and the bolt threaded metal fitting ( Align the cylindrical holes (23) of B) so that they communicate with each other, insert the screws (24) into the screw insertion holes (6) drilled in the side wall plate (2), and tighten the joint metal fittings to the joint side beam material (Wl). Fix (A).

From FIG. 4, the side beam material to be joined (W2) has its joint surface (25) on the joint surface (13) of the joint side beam material (Wl), and the upper surface ( (26) and (27) are in contact with each other so that they are approximately on the same plane. An insertion hole (28) is drilled horizontally through the side beam material (W2) to be joined, and the lower joining surface (2
5) is provided with a recess (29) into which the head of the screw (23) is inserted.

From Fig. 6, we can see that the side beam material to be joined (
W2), fit the bolt thread metal fitting (B) as described above, and attach the joint side beam material (Wl) to which the joint metal fitting (A) is fixed, to the lower surface of the 7 run part (1) of the joint metal fitting (A). (14) is in contact with the upper surface (27) of the side beam material to be joined (W2), and the side wall plate part (2)
Bolt insertion hole (5) drilled in and side beam material to be joined (W2)
The bolt shaft insertion hole (28) drilled in the hole (28) communicates with the screw (24) so that the head of the screw (24) fits into the four parts (29), and the bolt (C) is inserted into the side beam material (29) to be joined. Through the bolt shaft insertion hole (28) of W2), the bolt insertion hole (5) of the joining fitting (A), and the cylindrical hole (23) of the bolt screw alloy fitting (B), the tip end portion (11) is inserted into the bolt screw. Insert into the threaded hole (10) of the alloy tool (B) so that it is threaded, and rotate the bolt (C) to pull the joint side beam (Wl) in the direction of the side beam to be joined (W2). The joint surfaces (13) and (25) of the 4° side beams (Wl) and (W2)
Pull the screws (30), (30) into the screw holes (7), (7), provided in the 7-run part (1) of the joining fitting (A) until they are pressed together. - This completes the beam joining method of the present invention in which the joining side beam material (W1) and the to-be-joined side beam material (W2) are fixed by tightening through the joint.

(Effects) The side beams to be joined and the side beams to be joined constructed and joined according to the present invention have a very large load area that receives the load applied to the beams.
In addition, the joint surface of the upper side beam is always in pressure contact with the bolt, so the joint is extremely strong, and when the beam is overloaded, the joint will not break or cracks will occur in the beam. This has excellent practical effects such as there is no risk of weakening the strength.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the joining metal fitting used in the present invention, Fig. 2 is a vertical cross-sectional view of the bolt threading fitting, Fig. 3 is a side view of the bolt, and Fig. 4 is a side view of the side beam material to be joined. Figure 5 is a perspective view of the joint between the joint side beams, Figure 6 is a vertical cross-sectional view of the joint side beam fixed to the side beam to be joined, and Figure 7 is the conventional FIG. 3 is a longitudinal cross-sectional view showing a state in which the beams are joined. (A) Joint fitting 1) 7 run section 2) Side wall plate section 4) Cylindrical body B) Bolt screw fitting 8) Fitting body section 9 Outward facing flange section 10 Thread Hole C drawing dimension is bolt (11 thread section ( W,) Joining side beam material (13 joint surface (14 recessed part) (17 annular groove (20 bolt screw alloy insertion hole (W)) joint side beam material (25 joint surface bolt shaft insertion hole or more

Claims (1)

[Claims] On the joint surface (13) of the joint side beam material (W_1), the upper side of a rectangular metal plate of appropriate thickness is bent at right angles to form a flange part (1). The bottom edge of a cylindrical body (4) of an appropriate diameter made of a metal material is welded to the center of the wall surface (3) on the opposite side to the bending direction of the flange part of the cylindrical body (
A bolt insertion hole (5) is inserted into the side wall plate (2) on the axis center line of (4).
) is cut out in the recessed part (14) into which the side wall plate part (2) of the joining fitting (A) is inserted, and the bottom surface (16) of the recessed part (14) is cut out in the center thereof into an annular recessed groove into which the cylindrical body (4) is inserted. (17), and a recessed portion (14) is provided on the center line of the annular groove (17).
A bolt screw metal fitting insertion hole (20) with an open side is drilled, and a cylindrical bolt screw metal fitting (B) is inserted and fixed into the insertion hole (20), and the side beam material to be joined (W_2) is fixed. The lower surface of the flange part (1) of the joining fitting (A) is brought into contact with the upper surface, and the bolt shaft insertion hole (28) is made by penetrating the tension bolt (C) through the beam material (W_2) on the side to be joined. through the bolt insertion hole (5) of the joining fitting (A) and the cylindrical hole (2) of the bolt screw fitting (B).
3), then tighten the tip threaded part (11) of the tensioning bolt (C).
) is screwed into the screw hole (10) provided in the cylindrical hole (23), and the connecting side beam material (W_1
) towards the side beam to be joined (W_2) and both beams (
A wooden structure characterized by fixing the flange part (1) of the joining fitting (A) and the side beam material to be joined (W_2) in a state where the joining surfaces (13) and (25) of W_1) and (W_2) are in pressure contact. Beam joining method in architecture.