JP2015010389A - Frame joining structure and frame joining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently secure strength of a joining part, simultaneously when effectively restraining reduction in rigidity of the joining part by loosening of joining between a wooden frame and a metallic frame by secular shrinkage of the wooden frame.SOLUTION: A tapping long screw 4 in which an intermediate part in at least the longitudinal direction becomes a tapping screw part, is installed in the wooden frame 1 by putting its both end parts in a screwing-in penetrating state of projecting from both side surfaces of the wooden frame 1, and projection end parts 4A and 4B of the tapping long screw 4 projecting from both side surfaces 1A and 1B of the wooden frame 1 are respectively inserted into a screw insertion hole 9 of a first flange 3A and a second flange 3B joined to the metallic frame 2, and in a state of respectively applying the first and second flanges 3A and 3B to the respective side surfaces 1A and 1B of the wooden frame 1, the first and second flanges 3A and 3B are connected to the respective projection end parts 4A and 4B of the tapping long screw 4 by connectors 5 and 6.

Description

  The present invention relates to a frame joining structure for joining a wooden frame and a metal frame, and a frame joining method.

  Conventionally, the following (1) and (2) are known for this type of technology.

  (1) As shown in FIG. 5 a, the flange 3 is attached to one side of the wooden frame 1 by screwing a wood screw 20 into the wooden frame 1 through a screw insertion hole 9 formed in the flange 3 joined to the metal frame 2. What joins the wooden frame 1 and the metal frame 2 by press-fixing.

  (2) As shown in FIG. 6 a, a long bolt 30 is inserted into a bolt insertion hole 11 formed through the wooden frame 1, and each projecting end of the long bolt 30 is joined to the metal frame 2. Each of the first flange 3A and the second flange 3B is connected by the receiving nut 5 and the holding nut 6 so that the wooden frame 1 and the metal are sandwiched between the first and second flanges 3A and 3B. Joining frame 2

  By the way, in the technique (1), as shown in FIG. 5B, a gap S is generated between the flange 3 and the wooden frame 1 due to the shrinkage of the wooden frame 1 over time, whereby the wooden frame 1 and the metal frame 2 are joined. Even if some looseness occurs, the joining of the wooden frame 1 and the metal frame 2 is maintained until the wood screw 20 is pulled out of the wooden frame 1.

  However, the pulling-out load of the wood screw is not so large. Therefore, in the stage before the wooden frame itself can not bear the load and breaks in an earthquake or the like, as shown in FIG. There is a problem that the joint between the wooden frame 1 and the metal frame 2 is cut off, and the building is likely to collapse.

  On the other hand, in the technique (2), both the frames 1 and 2 are joined by sandwiching the wooden frame 1 by the first and second flanges 3A and 3B via the long bolts 30, so that the wooden frame itself is broken in an earthquake or the like. It is possible to effectively avoid that the frames 1 and 2 are disconnected at the stage before reaching.

  However, in the technique (2), as shown in FIG. 6 b, the gap S due to aged shrinkage of the wooden frame 1 is between the first flange 3 </ b> A and the wooden frame 1, and the second flange 3 </ b> B and the wooden frame 1 are Since the long bolt 30 freely moves with respect to the bolt insertion hole 11 of the wooden frame 1, a large looseness corresponding to the gap S between these two locations is generated in the joining of both frames 1 and 2. There was a problem that the overall strength of the building was greatly impaired due to the large looseness.

  The problems of rigidity and strength in joining the two frames 1 and 2 as described above are particularly important when the joining structure of the wooden frame 1 and the metal frame 2 is used in a building having a low-rise large-span structure.

  In view of such circumstances, the main problem of the present invention is to effectively suppress the decrease in the rigidity of the joint due to the looseness of the joint between the wooden frame and the metal frame due to the aging shrinkage of the wooden frame, and at the same time, the wooden frame and the metal It is in the point which ensures the intensity | strength of a junction part with a flame | frame sufficiently.

A first characteristic configuration of the present invention relates to a frame joint structure,
A frame joining structure for joining a wooden frame and a metal frame,
At least a tapping long screw having a tapping screw portion in the middle in the longitudinal direction is attached to the wooden frame by screwing it into the wooden frame so that both ends protrude from both sides of the wooden frame. ,
A projecting end portion of one end of the tapping long screw projecting from one side surface of the wooden frame is inserted into a screw insertion hole of a first flange joined to the metal frame, and the first flange is disposed on one side surface of the wooden frame. And the projecting end of the tapping long screw projecting from the other side surface of the wooden frame is inserted into the screw insertion hole of the second flange so that the second flange is placed on the other side surface of the wooden frame. By connecting the first and second flanges to the projecting end portions of the tapping long screw with a connector attached to each projecting end portion of the tapping long screw, On the other hand, the metal frame is joined to the wooden frame via the tapping screw portion in the biting state.

  That is, according to this configuration, even if the gap due to the aging shrinkage of the wooden frame is generated in each of two places between the first flange and the wooden frame and between the second flange and the wooden frame, the tapping length Since the tapping screw part of the screw is engaged with the wooden frame and free movement of the tapping long screw with respect to the wooden frame is prevented, a large looseness corresponding to the gap between the above two locations is caused between the wooden frame and the metal frame. It can be prevented from occurring in joining.

  Further, similar to the technique (2), since both frames are joined together by sandwiching the wooden frame by the first and second flanges via the tapping long screw, the wooden frame and the tapping screw portion in an earthquake or the like. Even if the biting state is broken, it can be effectively avoided that the joining of both frames is cut off before the wooden frame itself breaks.

  Further, in this configuration, the load on the wooden frame is absorbed due to the breakage of the biting state between the wooden frame and the tapping screw part and the friction between the tapping screw part and the wooden frame thereafter, It can also contribute to preventing breakage of the wooden frame due to an earthquake or the like.

  Furthermore, since the biting between the tapping screw portion of the tapping long screw and the wooden frame is further strengthened by tightening accompanying the contraction of the wooden frame, the contribution of the wooden frame to breakage is more effective.

  Thus, according to this configuration, the loosening of the joining between the wooden frame and the metal frame due to the aging shrinkage of the wooden frame is effectively suppressed, and the joining of both the frames is broken before the breaking of the wooden frame. Since it effectively avoids the deterioration of the rigidity of the joint, it is possible to sufficiently secure the strength of the joint between the wooden frame and the metal frame, and further prevent the wooden frame from breaking. Can also contribute.

  In the implementation of this configuration, the connector is not necessarily limited to another member that can be attached to the tapping long screw. For example, one side of the connector on the one end side and the connector on the other end side. The connector may be composed of a screw head of a tapping long screw.

The second feature configuration of the present invention is a configuration suitable for the implementation of the first feature configuration.
The connecting tool on each of the one end side and the other end side with respect to each projecting end of the tapping long screw comprises a receiving nut and a holding nut that can be screwed with each projecting end of the tapping long screw,
Each of the first flange and the second flange is tightly fixed by the receiving nut and the holding nut, thereby connecting each of the first and second flanges to each protruding end of the tapping long screw. It is in a certain point.

  That is, according to this configuration, even if the gap due to the aging shrinkage of the wooden frame is generated between the first flange and the wooden frame and between the second flange and the wooden frame, the tapping screw of the tapping long screw is used. Since the portion is in a state of being engaged with the wooden frame and each of the first and second flanges is tightly fixed to the tapping long screw by the receiving nut and the holding nut, the first flange and the second flange The relative movement between the wooden frame and the wooden frame is regulated, thereby preventing the loosening of the joining between the wooden frame and the metal frame due to the aging shrinkage of the wooden frame more effectively.

  In addition, by adjusting the position of the receiving nut and the holding nut with respect to the tapping pin long screw by screwing operation, an appropriate joined state corresponding to the thickness dimension of the wooden frame can be obtained.

The third characteristic configuration of the present invention is a configuration suitable for implementing the first or second characteristic configuration,
The wooden frame is a pillar, and the metal frame is a beam.

  That is, according to the above configuration, in the mixed structure in which the columns are wood and the beams are steel frames, it is possible to obtain the effects obtained by the implementation of the first or second characteristic configuration. This can be effectively used when a spanned structure with a wooden column and steel beam is used.

The fourth characteristic configuration of the present invention relates to the frame joining method,
A frame joining method for joining a wooden frame and a metal frame,
By screwing a tapping long screw having a tapping screw portion at least in the middle in the longitudinal direction into the wooden frame, the tapping long screw is brought into a screw-through state in which both end portions protrude from both side surfaces of the wooden frame. Attached to the wooden frame,
In the state where the long screw is attached, the protruding end portion on one end side of the tapping long screw protruding from one side surface of the wooden frame is inserted into the screw insertion hole of the first flange joined to the metal frame. Apply one flange to one side of the wooden frame,
In this first flange application state, the first flange is connected to the protruding end on one end of the tapping long screw by a connecting tool on one end attached to the protruding end on one end of the tapping long screw,
Similarly, in the long screw mounting state, the second flange is moved in the state where the protruding end portion on the other end side of the tapping long screw protruding from the other side surface of the wooden frame is inserted into the screw insertion hole of the second flange. Apply it to the other side of the wooden frame,
In the second flange applied state, the second flange is connected to the projecting end on the other end of the tappin long screw by a connecting tool on the other end mounted on the projecting end on the other end of the tappin long screw. Concatenate,
By connecting the first and second flanges to the tapping long screw, the metal frame is joined to the wooden frame via the tapping screw portion in a state of being bitten with respect to the wooden frame.

  That is, according to this configuration, the frame joint structure having the first characteristic configuration described above can be easily obtained. In particular, in this configuration, after the tapping long screw is screwed in (in other words, the tapping long screw is fixed to the wooden frame), the first and second flanges are connected to the tapping long screw. Compared to the operation of screwing the tapping long screw into the wooden frame while the first or second flange is applied to the side of the wooden frame, the first or second tapping long screw is screwed in. Construction is facilitated in that the holding of the flange position can be eliminated.

The fifth characteristic configuration of the present invention is a configuration suitable for the implementation of the fourth characteristic configuration.
The connecting tool on each of the one end side and the other end side with respect to each projecting end of the tapping long screw comprises a receiving nut and a holding nut that can be screwed with each projecting end of the tapping long screw,
In the first flange applied state, the first flange is tightly fixed by the receiving nut on one end side and the holding nut on one end side to thereby fix the first flange on one end side of the tapping long screw. Connected to the
In the second flange abutting state, the second flange is narrowly fixed by the receiving nut on the other end side and the holding nut on the other end side, thereby fixing the second flange to the other end side of the tapping long screw. It is in the point connected to the protruding end of

  That is, according to this configuration, the frame joint structure having the second characteristic configuration described above can be easily obtained. In particular, in this configuration, for example, after the screwing operation of the tapping long screw (in other words, the fixing operation of the tapping long screw with respect to the wooden frame) is performed in advance, Since it is possible to connect the two flanges to the tapping long screws, the tapping long screws can be screwed into the wooden frame with the receiving nut and the first or second flange applied to the side of the wooden frame. In comparison, construction can be facilitated.

Schematic perspective view of low-rise large-span building with wood-steel mixed structure Explanatory cross-sectional view showing the beam-column joint structure of FIG. Cross-sectional illustration of Fig. 2a when the wooden pole has undergone aged shrinkage Explanatory cross-sectional view of FIG. 2b when a large load is applied to the joint structure Enlarged view of the tapping screw part of the tapping long screw in the embodiment Explanatory cross-sectional view showing the beam-column joint structure of FIG. Cross-sectional view illustrating a conventional example of a wood-steel mixed structure joint structure Explanatory cross-sectional view of Fig. 5a when the wooden pole has undergone aged shrinkage Cross-sectional view of FIG. 5b when a large load is applied to the joint structure Cross-sectional view illustrating a conventional example of a wood-steel mixed structure joint structure Explanatory cross-sectional view of Fig. 5a when the wooden pole has undergone aged shrinkage

  FIG. 1 shows a schematic column beam structure of a low-rise large-span building with a wood-steel mixed structure using the frame joint structure of the present invention. A wooden column 1 (an example of a wooden frame) is arranged in parallel on the outer peripheral side of the building. Then, a steel beam 2 (an example of a metal frame) is installed across the wooden pillar 1.

  FIG. 2a shows the beam-column joint structure (A) in the building of FIG. 1, which includes a wooden column 1, a steel beam 2 having a flat plate-like first flange 3A, a flat plate-like second flange 3B, and a tapping length. The screw 4 is composed of a receiving nut 5 and a holding nut 6 (an example of a coupling tool) that are screwed onto the tapping long screw 4.

  In this joining structure, the first flange 3A applied to one side 1A of the wooden pole 1 and the second flange 3B applied to the other side 1B of the wooden pole 1 are tapped with a screwing operation on the wooden pole 1. The steel beam 2 is joined to one side 1 </ b> A of the wooden pole 1 by being joined to the wooden pole 1 via the long screw 4.

  Moreover, although it is the specific form of each structure, the recessed part 7 which accommodates 1st and 2nd flanges 3A and 3B is provided in the both-sides 1A and 1B of the wooden pole 1, and furthermore, the recessed part 7 has A countersink 8 for receiving the receiving nut 5 is provided, and the countersink 8 is formed to a depth where the surface of the receiving nut 5 stored therein and the bottom surface of the recess 7 are flush with each other.

  As shown in FIG. 3, the tapping long screw 4 in the present joining structure has a flat screw tip surface without a screw head and a tapping screw portion 10 over the entire length. The tapping screw portion 10 has a receiving nut 5 and a presser. The nut 6 is screwed.

  The shape of the tapping screw portion 10 of the tapping long screw 4 is as shown in FIG. 3, and the crest 10b of the screw thread 10a is formed to be flat and wide, and the screw groove 10c. Is formed in a U-shaped valley shape (in other words, the thickness of the screw thread 10a is increased as it approaches the valley bottom 10d).

  In this way, the crest 10b of the tapping screw portion 10 has a width, and the screw structure 10c is formed in a U-shaped valley shape, so that the tapping screw portion 10 is in a state of being bitten with wood or the nut is tapping screw portion. In this state, the load required for pulling out the tapping long screw 4 is effectively increased.

  Further, the tappin long screw 4 has a large pitch of the tappin screw portion 10 (that is, the screw structure 10c is wide). Therefore, when the tappin long screw 4 is screwed into the wood, more wood fibers are used. Can be taken into the screw structure 10c, and thereby the connection strength by the biting between the wood and the tapping screw portion 10 is further increased.

    Moreover, this joining structure is assembled in the following procedures (a) to (f), for example.

    (A) The tapping long screw 4 is screwed into the wooden column 1 through a pilot hole previously drilled in the side face 1A of the one side 1A of the wooden column 1, and both ends of the tapping long screw 4 are on both sides of the wooden column 1. A tapping long screw is attached to the wooden pole 1 in a penetrating state protruding from the 1A and 1B digging 8.

  (B) The receiving nut 5 screwed to the tapping screw portion 10 is accommodated in the counterbore 8 provided on the both side surfaces 1A, 1B of the wooden pole 1.

  (C) In one side 1A of the wooden pole 1, the protruding end 4A of the tapping long screw 4 on one side is inserted into the screw insertion hole 9 of the first flange 3A, and the first flange 3A is a recess on the one side. The first flange 3 </ b> A is applied to the wooden pole 1 so as to be housed in 7.

  (D) With the first flange 3A applied to the wooden pole 1, the holding nut 6 is screwed into the protruding end 4A on one end side of the tapping long screw 4 to fix the first flange 3A to the wooden pole 1. At the same time, the first flange 3A is received and fixed by the nut 5 and the holding nut 6.

  (E) Similarly, on the other side 1B of the wooden pole 1, the protruding end 4B of the tapping long screw 4 on the other side is inserted into the screw insertion hole 9 of the second flange 3B, and the second flange 3B is connected to the other side. The second flange 3B is applied to the wooden pole 1 so as to be accommodated in the concave portion 7 on the side.

  (F) With the second flange 3B applied to the wooden pole 1, the holding nut 6 is screwed into the protruding end 4B on one end of the tapping long screw 4 to fix the second flange 3B to the wooden pole 1. At the same time, the second flange 3B is received and fixed by the nut 5 and the holding nut 6.

  Thus, in this joining structure, each of the first and second flanges 3A and 3B is connected to the receiving nut 5 and the holding nut 6 by the screwing operation of the holding nut to the protruding end portions 4A and 4B of the tapping long screw 4. Is fixed to the projecting end portions 4A and 4B of the tapping long screw 4 by sandwiching.

  Further, since the tapping screw portion 10 of the tapping long screw 4 screwed into the wooden pole 1 is in a state of being engaged with the wooden pole 1, the tapping long screw 4 is fixed to the wooden pole 1.

  That is, in this joining structure, the tapping screw portion 10 of the tapping long screw 4 is fixed to the wooden pole 1, and each of the first and second flanges 3A and 3B is fixed to the tapping long screw 4. The wooden pillar 1 and the steel beam 2 are joined in a state where relative movement between the first and second flanges 3A and 3B and the wooden pillar 1 is restricted.

  Therefore, as shown in FIG. 2b, even if gaps due to aging shrinkage of the wooden pillar 1 occur between the first flange 3A and the wooden pillar 1, and between the second flange 3B and the wooden pillar 1, respectively. Since the relative movement of the first and second flanges 3A and 3B with respect to the wooden pillar 1 is restricted, it is possible to effectively prevent loosening of the joining of the wooden pillar 1 and the steel beam 2 due to the shrinkage of the wooden pillar 1 over time. Can do.

  Further, since the wooden pillar 1 and the steel beam 2 are joined together by sandwiching the wooden pillar 1 by the first and second flanges 3A and 3B via the tapping long screw 4, as shown in FIG. Even if the biting state between the wooden pillar 1 and the tapping screw portion 10 is broken in such as, the fact that the joining of the wooden pillar 1 and the steel beam 2 is cut off before the wooden pillar itself breaks is effective. Can be avoided.

[Another embodiment]
In the above-described embodiment, the column beam connection structure in which one steel beam is bonded to one wooden column is shown. However, the column beam connection structure (B) in the building of FIG. 1 shown in FIG. As described above, the steel beam 2 may be joined to both side surfaces of the wooden pole 1 by using the second flange 3B joined to the steel beam 2.

  In the above-described embodiment, the example in which the joining structure is assembled by the above-described procedures (a) to (f) has been described. However, the present invention is not limited to this, and for example, the seat before the tapping long screw 4 is attached to the wooden pole 1. The receiving nut 5 may be provided on the digging 8 or the tapping long screw 4, and the attaching operation of the tapping long screw 4 to the wooden pole 1 may be performed in a state where the tapping long screw 4 is passed through the first flange 3 </ b> A.

  The tapping long screw 4 is not limited to that of the tapping screw portion 4 as long as the tapping long screw 4 has at least an intermediate portion in the longitudinal direction as the tapping screw portion 10, and both ends of the tapping long screw 4 may be bolt screw portions. .

  In addition, when the both ends of the tapping long screw 4 are bolt screw parts, the receiving nut 5 and the holding nut 6 are assumed to be screwable with the bolt screw part.

  The tappin long screw 4 is not limited to a flat screw tip, and may be a screw tip that is sharp.

  The tapping long screw 4 is not limited to one having no screw head, and may be one having a screw head.

  The specific shape of the tapping screw portion 10 of the tapping long screw 4 is not limited to that shown in FIG. 3, and may be any shape as long as it can be brought into a state of being bitten with wood by being screwed into the wood.

  In the above-described embodiment, the wooden pillar is selected as the wood frame and the steel beam is selected as the metal frame. However, the present invention is not limited to this, and the usage form of the wood frame and the metal frame may be appropriately selected.

  In the above-described embodiment, the wooden column is a wooden frame and the steel beam is a metal frame. However, the present invention is not limited to this. For example, the wooden column may be a wooden frame and the steel column may be a metal frame. The invention can be applied to joining various wooden frames and various metal frames.

  In the above-described embodiment, the receiving nut 5 and the holding nut 6 are shown as an example of the connecting tool, but the present invention is not limited to this as long as the first and second flanges 3A and 3B can be connected to the tapping long screw 4.

  The frame joint structure and the frame joint of the present invention can be used for a frame joint structure used for various applications in various fields.

1 Wooden pillar (wooden frame)
2 Steel beam (metal frame)
10 Tapping screw portion 4 Tapping long screw 1A One side surface 4A, 4B Projecting end portion 3A First flange 9 Screw insertion hole 1B Other side surface 3B Second flange 5 Receiving nut 6 Holding nut

Claims (5)

A frame joining structure for joining a wooden frame and a metal frame,
At least a tapping long screw having a tapping screw portion in the middle in the longitudinal direction is attached to the wooden frame by screwing it into the wooden frame so that both ends protrude from both sides of the wooden frame. ,
A projecting end portion of one end of the tapping long screw projecting from one side surface of the wooden frame is inserted into a screw insertion hole of a first flange joined to the metal frame, and the first flange is disposed on one side surface of the wooden frame. And the projecting end of the tapping long screw projecting from the other side surface of the wooden frame is inserted into the screw insertion hole of the second flange so that the second flange is placed on the other side surface of the wooden frame. By connecting the first and second flanges to the projecting end portions of the tapping long screw with a connector attached to each projecting end portion of the tapping long screw, A frame joining structure in which the metal frame is joined to the wooden frame via the tapping screw portion in a biting state. The connecting tool on each of the one end side and the other end side with respect to each projecting end of the tapping long screw comprises a receiving nut and a holding nut that can be screwed with each projecting end of the tapping long screw,
Each of the first flange and the second flange is tightly fixed by the receiving nut and the holding nut, thereby connecting each of the first and second flanges to each protruding end of the tapping long screw. The frame joint structure according to claim 1.   The frame joining structure according to claim 1 or 2, wherein the wooden frame is a pillar and the metal frame is a beam. A frame joining method for joining a wooden frame and a metal frame,
By screwing a tapping long screw having a tapping screw portion at least in the middle in the longitudinal direction into the wooden frame, the tapping long screw is brought into a screw-through state in which both end portions protrude from both side surfaces of the wooden frame. Attached to the wooden frame,
In the state where the long screw is attached, the protruding end portion on one end side of the tapping long screw protruding from one side surface of the wooden frame is inserted into the screw insertion hole of the first flange joined to the metal frame. Apply one flange to one side of the wooden frame,
In this first flange application state, the first flange is connected to the protruding end on one end of the tapping long screw by a connecting tool on one end attached to the protruding end on one end of the tapping long screw,
Similarly, in the long screw mounting state, the second flange is moved in the state where the protruding end portion on the other end side of the tapping long screw protruding from the other side surface of the wooden frame is inserted into the screw insertion hole of the second flange. Apply it to the other side of the wooden frame,
In the second flange applied state, the second flange is connected to the projecting end on the other end of the tappin long screw by a connecting tool on the other end mounted on the projecting end on the other end of the tappin long screw. Concatenate,
A frame joining method in which the metal frame is joined to the wooden frame via the tapping screw portion in a state of being engaged with the wooden frame by connecting the first and second flanges to the tapping long screw. The connecting tool on each of the one end side and the other end side with respect to each projecting end of the tapping long screw comprises a receiving nut and a holding nut that can be screwed with each projecting end of the tapping long screw,
In the first flange applied state, the first flange is tightly fixed by the receiving nut on one end side and the holding nut on one end side to thereby fix the first flange on one end side of the tapping long screw. Connected to the
In the second flange abutting state, the second flange is narrowly fixed by the receiving nut on the other end side and the holding nut on the other end side, thereby fixing the second flange to the other end side of the tapping long screw. The frame joining method according to claim 4, wherein the frame joining method is connected to the protruding end of the frame.

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