Joining structure and joining method

Abstract

To provide a joint structure capable of forming a joint structure easily and highly accurately in which a structure member by a wooden material is joined with another structure member.SOLUTION: A wall 1 is a structure member which is constituted by superposing a plurality of tabular wooden materials 10 in the out-of-plane direction. These wooden materials 10 have grooves 111 on opposing surfaces with each other, and by the combination of the grooves 111, a hole 11 is formed striding over the plurality of wooden materials 10. A reinforcement 4 protruding from a beam 3 which is another structure member is positioned in the hole 11, and the hole 11 is filled with a filling material 7, and the wall 1 and the beam 3 are joined together.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a joint structure and a joint method for structural members made of wooden materials. [Background technology]

[0002] Wood materials such as LVL (Laminated Veneer Lumber) and CLT (Cross Laminated Timber) are lightweight and strong, and are widely used in building structures. For example, Patent Document 1 discloses a structure in which a wooden wall material is joined to a wooden floor material using tension bolts.

[0003] On the other hand, wood materials have the disadvantage of low toughness and being prone to brittle fractures such as splitting. Therefore, when using wood materials in structures, there are still issues to be addressed in terms of deformation performance and ensuring the ability to absorb earthquake energy.

[0004] Therefore, as a joint structure between wooden materials and the frame, GIR (Glued-in-Rod) joints are sometimes used, in which reinforcing bars protruding from the frame are inserted into holes in the wooden materials and fixed in place by injecting adhesive into the holes. By using GIR joints, the reinforcing bars are made to yield, concentrating damage on the reinforcing bars that have the ability to deform, improving the ductility of the frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2019-27020 A Summary of the Invention [Problem to be solved by the invention]

[0006] GIR joints require high precision in forming holes in wooden materials. For example, it is preferable to increase the anchorage length of the rebar so that the GIR joint can exert sufficient strength and the rebar will yield, but if you try to form a long hole in the wooden material, a long drill is required, making it difficult to ensure vertical precision. In addition, the length of the drill limits the length of the hole that can be formed.

[0007] Furthermore, in a typical GIR joint, it is necessary to move the wooden material in the axial direction of the rebar to insert the rebar into the hole, which may restrict construction in order to secure space for movement. In this regard, in Patent Document 1, an open groove is formed on the wall surface of the wall material, so that the wall material can be moved in a direction perpendicular to the axis of the tension bolt to place the tension bolt in the open groove, but the open groove cannot be filled with adhesive, and a similar configuration cannot be applied to a GIR joint.

[0008] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a joining structure, etc., that can easily and with high precision form a joining structure in which a structural member made of wood is joined to another structural member. [Means for solving the problem]

[0009] The first invention for achieving the above-mentioned object is a joint structure for joining a structural member made of a wooden material to another structural member, the structural member made of the wooden material being constructed by stacking a plurality of wooden materials, the plurality of wooden materials having grooves on their opposing surfaces, a hole spanning the plurality of wooden materials being formed by combining the grooves, a rod protruding from the other structural member being positioned within the hole, and the hole being filled with a filler material. The structural member made of wood is a wall, which is constructed by stacking a plurality of plank-shaped wood members in the out-of-plane direction. The joining structure is characterized by the above.

[0010] In the present invention, a structural member is constructed by stacking a plurality of wooden materials, and at that time, grooves formed on the opposing surfaces of the plurality of wooden materials are combined to form a hole that spans the plurality of wooden materials. A bar protruding from another structural member is inserted into this hole, and the hole is filled with a filler, thereby enabling GIR joining of the structural members. The groove can be formed by cutting the surface of the wooden material, etc., so that a groove of a desired cross section and length can be formed with high precision. In addition, during actual construction, the position of the groove can be aligned with the bar material, and the plurality of wooden materials can be stacked, and these wooden materials can be moved and positioned in a direction perpendicular to the axis of the bar material, making construction easy and reducing restrictions during construction. The structural member made of the wood material is a wall, and since it is constructed by stacking a plurality of plank-shaped wood materials in the out-of-plane direction, the wooden wall can be easily constructed.

[0011] The other structural member may be a beam, and the bar material protruding vertically from the beam may be disposed within the vertical hole provided in the wall.

[0012] A recess may be formed on the inner surface of the hole. This increases the resistance to the pull-out of the bar, which may allow the length of the hole and the length of the bar to be shortened.

[0013] The holes may be gradually wider towards their ends. This also increases the resistance of the bar to being pulled out. Also, since the cross section of the hole is larger near the tip of the bar where construction errors are relatively likely to be large, it is easier to absorb construction errors of the bar and place the bar in the hole.

[0014] It is also preferable that the rod is formed with a widened portion for attachment to the filler material. This makes it possible to expect a supporting effect from the widened portion, thereby improving the fixation of the bar material to the filler material.

[0015] The second invention is a method for joining a structural member made of a wooden material to another structural member, comprising the steps of: arranging the structural member made of a wooden material so that a bar protruding from the other structural member is positioned within a hole in the structural member made of a wooden material; and filling the hole with a filler material. The structural member made of a wooden material is It is a wall. , multiple Plate-shaped Wood materials In the out-of-plane direction This is a joining method characterized in that the multiple wooden pieces are stacked on top of each other, the multiple wooden pieces have grooves on their opposing surfaces, and the hole is formed so as to span the multiple wooden pieces by combining the grooves. Effect of the Invention

[0016] According to the present invention, it is possible to provide a joint structure etc. that can easily and accurately form a joint structure in which a structural member made of wood is joined to another structural member. [Brief description of the drawings]

[0017] [Figure 1] A diagram showing part of the building's structure. [Diagram 2] A diagram showing the joint structure between a wall 1 and a beam 3. [Diagram 3] A diagram showing how a wall 1 and a beam 3 are joined. [Figure 4] FIG. 13 is a diagram showing grooves 111a and 111b. [Diagram 5] 4A to 4C are diagrams illustrating a method for forming a groove 111a. [Figure 6] A diagram showing the widening portion 41 and the adhesion removal portion 42 of the reinforcing bar 4. [Figure 7] FIG. [Figure 8] An example of combining wooden structural members with other structural members. [Figure 9] An example in which a hole 21 is formed by grooves 211 in three pieces of wood 20. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0019] (1.Joint structure) Fig. 1 is a diagram showing a part of a building frame to which a joint structure according to an embodiment of the present invention is applied. As shown in Fig. 1, in this embodiment, a wall 1 (wooden wall) made of wooden materials is installed within a frame-shaped frame made of left and right columns 2 and upper and lower beams 3, and the wall 1 and the upper and lower beams 3 are joined by a joint structure described later.

[0020] The wall 1 is a structural member made of wood. The pillars 2 and the beams 3 are structural members made of, for example, RC (reinforced concrete), S (steel frame), SRC (steel reinforced concrete), wood, or the like.

[0021] Figure 2(a) shows the joint structure C between the wall 1 and the beam 3, and shows a cross section of the wall 1 in the out-of-plane direction. The out-of-plane direction is the direction perpendicular to the wall surface, and corresponds to the normal direction to the paper surface of Figure 1. In contrast, the direction parallel to the wall surface is called the in-plane direction.

[0022] In this joint structure C, a reinforcing bar 4, which is a rod material that protrudes vertically from a beam 3, is placed in a vertical hole 11 provided in a wall 1. The reinforcing bar 4 is located at the center of the hole 11. A filler material 7 is injected into the hole 11, thereby filling the hole 11 with the filler material 7. The filler material 7 is an adhesive material such as epoxy resin, but is not limited to this. Mortar 8, which is a cement-based solidification material, is provided in the gap between the wall 1 and the beam 3.

[0023] The wall 1 is a wall body formed by stacking two plank-shaped wooden pieces 10 with their plank surfaces facing each other. Wood-based materials such as CLT and LVL can be used for the wooden pieces 10. CLT and LVL are well known and will not be described here. The two wooden pieces 10 are preferably approximately the same thickness, but may be of different thicknesses. The two wooden pieces 10 are stacked together and integrated with connecting materials (not shown) such as screws or bolts, or with adhesives, etc.

[0024] The two wooden pieces 10 have grooves 111 on their opposing surfaces, and the hole 11 is formed so as to straddle the two wooden pieces 10 when the two wooden pieces 10 are overlapped with each other by the grooves 111 fitting together.

[0025] Fig. 2(b) is a diagram showing a groove 111 in the wooden material 10. The groove 111 can be formed by cutting the wooden material 10 with a cutting blade (not shown) while moving the cutting blade relatively to the wooden material 10 in the longitudinal direction of the groove 111. In this embodiment, the cross section of the groove 111 is approximately semicircular, and the depth D and width W are constant over almost the entire length except near the terminal end (referring to the end at the far side in Fig. 2(b)).

[0026] Therefore, in this embodiment, the combination of grooves 111 makes the cross section of hole 11 in a direction perpendicular to the length direction (hereinafter simply referred to as the cross section) circular, and the distance between the reinforcing bar 4 located at the center of hole 11 and the inner surface of hole 11 is equal all around hole 11. In addition, the diameter of the cross section is constant over almost the entire length of hole 11, making it difficult for breakage due to stress concentration to occur.

[0027] (2. How to join wall 1 and beam 3) When joining the wall 1 and the beam 3, one of the wooden pieces 10 is moved in the out-of-plane direction toward the reinforcing bar 4 as shown by the arrow d1 in Fig. 3(a) and placed at a predetermined location on the beam 3 so that the position of the groove 111 matches the position of the reinforcing bar 4. Similarly, the other wooden piece 10 is moved in the out-of-plane direction toward the reinforcing bar 4 as shown by the arrow d2 in Fig. 3(a) and placed at a predetermined location on the beam 3 so that the position of the groove 111 matches the position of the reinforcing bar 4.

[0028] In this way, two wooden pieces 10 are stacked with their board surfaces facing each other, and the wall 1 is arranged. At this time, the grooves 111 of the two wooden pieces 10 are combined to form holes 11, and reinforcing bars 4 are placed in these holes 11. These two wooden pieces 10 are integrated with the above-mentioned connecting material and adhesive material. Thereafter, mortar 8 is poured into the gap between the wall 1 and the beam 3, and the filler material 7 is filled in the holes 11, thereby joining the wall 1 and the beam 3. The filler material 7 can be injected into the holes 11 through an injection hole (not shown) provided in advance in one of the wooden pieces 10.

[0029] The reinforcing bars 4 are arranged at the four corners of the wall 1 as shown in Figure 1, and bear the tensile force associated with the in-plane rotation moment that occurs in the wall 1 during an earthquake. Meanwhile, reference numeral 5 in Figure 1 denotes a reinforcing bar that bears the horizontal shear force that occurs between the wall 1 and the beam 3 during an earthquake, and is arranged between the reinforcing bars 4 on both sides in the beam axis direction. This reinforcing bar 5 also protrudes vertically from the beam 3 and is arranged in a hole 11 provided in the wall 1, forming a joint structure similar to joint structure C in Figure 2(a). However, the anchorage length of the reinforcing bar 5 and the length of the hole 11 are shorter than in the example of Figure 2(a).

[0030] In this manner, in this embodiment, the wall 1, which is a wooden wall, is constructed by stacking a plurality of wooden materials 10, and at this time, grooves 111 formed on the mutually opposing surfaces of the plurality of wooden materials 10 are combined to form holes 11 that span the plurality of wooden materials 10. The reinforcing bars 4 protruding from the beams 3 are inserted into the holes 11, and the filler material 7 is filled into the holes 11, thereby enabling the GIR joint between the wall 1 and the beams 3 to be performed.

[0031] As described above, when drilling holes with a drill bit, there is a limit to the length of the hole that can be drilled and it is difficult to ensure the accuracy of the drilling. However, the groove 111 in this embodiment can be formed by cutting the surface of the wood material 10, so that groove 111 of the desired cross-section and length can be formed with high accuracy.

[0032] Furthermore, during actual construction, multiple wooden pieces 10 can be stacked together to align the grooves 111 with the reinforcing bars 4, and these wooden pieces 10 can be moved and positioned in an out-of-plane direction (corresponding to the direction perpendicular to the axis of the reinforcing bars 4), making construction easy and reducing restrictions during construction. For example, even after a frame-like structure consisting of left and right columns 2 and upper and lower beams 3 has been constructed, it is possible to construct the wall 1 afterwards. In some cases, it is also possible to process the wooden pieces 10 to suit the site and modify the size of the grooves 111.

[0033] However, the present invention is not limited to the above embodiment. For example, the shape of the groove 111 is not limited to the example shown in Fig. 2(b), and the cross-sectional shape of the groove 111 may be rectangular or trapezoidal depending on the shape of the cutting blade, etc.

[0034] Also, as shown in FIG. 4(a), by forming unevenness on the inner side of the groove 111a, it is possible to provide one or more recesses 112 on the inner side of the hole 11a. The unevenness of the groove 111a can be easily formed, for example, by pushing a cutting blade moving relative to the wooden material 10 toward the wooden material 10 during cutting processing of the wooden material 10. Depending on the shape of the cutting blade, as shown in FIG. 5, by pushing the cutting blade 9 toward the wooden material 10, not only the depth D but also the width W of the groove 111a may be increased, in which case a recess 112 can be formed around the entire circumference of the hole 11a. Depending on the processing method, it is also possible to increase only the width W of the groove 111b and provide a recess in the hole 11a.

[0035] In this way, by providing the recesses 112 in the holes 11a, it is possible to increase the resistance to the pull-out of the reinforcing bars 4. Therefore, it is possible to reduce the anchorage length of the reinforcing bars 4 and the length of the holes 11a. In the example of FIG. 4(a), the grooves 111a of the two wooden pieces 10 have the same uneven shape, but these uneven shapes may be different. The recesses 112 cannot be formed by a drill, but in this embodiment, the recesses 112 can be easily formed by cutting the wooden piece 10.

[0036] As shown in Fig. 4(b), by devising the shape of the groove 111b, it is also possible to gradually increase the width of the hole 11b toward the end. This also increases the resistance to the pull-out of the reinforcing bar 4, as described above. Even if the construction error of the planar position of the reinforcing bar 4 increases toward the end, the construction error can be absorbed and the reinforcing bar 4 can be easily placed in the hole 11b. Furthermore, since the volume of the hole 11b does not become excessively large, it is not necessary to take time and effort to inject the filler 7.

[0037] Groove 111b can be easily formed, for example, by gradually pushing a cutting blade toward wooden material 10 while moving the cutting blade toward the end of groove 111b relative to wooden material 10 during cutting of wooden material 10. As in Fig. 5, when pushing the cutting blade toward wooden material 10 increases not only depth D but also width W of groove 111b, the above cutting process gradually increases not only depth D but also width W of groove 111b, and hole 11b widens in a pyramidal shape. Depending on the processing method, it is also possible to gradually increase only width W of groove 111b.

[0038] Furthermore, as shown in FIG. 6(a), it is also possible to provide a widening portion 41 at the tip of the reinforcing bar 4. This can be expected to provide a bearing effect from the widening portion 41 in addition to the adhesive force of the surface of the reinforcing bar 4, improve the fixation of the reinforcing bar 4 to the filling material 7, and reduce the fixation length of the reinforcing bar 4 and the length of the hole 11. The position of the widening portion 41 is not limited to the tip of the reinforcing bar 4, and it can be formed in the middle of the protruding part of the reinforcing bar 4, and the same effect as above can be obtained. The widening portion 41 can be formed using, for example, a weld excess, an anchoring plate, a nut, etc., but is not limited to these.

[0039] 6(b), an adhesion removal section 42 can be provided around the reinforcing bar 4 on the base side (beam 3 side) of the protruding portion of the reinforcing bar 4 to prevent adhesion between the reinforcing bar 4 and the filler 7. The adhesion removal section 42 can be formed, for example, by attaching a thick tape around the reinforcing bar 4 or by filling the area around the reinforcing bar 4 with clay or the like.

[0040] If the adhesion removal section 42 is not provided, when an in-plane rotational moment occurs in the wall 1, the only section in which the reinforcing bar 4 will yield and stretch will be the gap between the wall 1 and the beam 3, and the stretching of the reinforcing bar 4 will be concentrated in that section, which may cause the reinforcing bar 4 to fracture brittlely. However, by providing the adhesion removal section 42 as described above, the section in which the reinforcing bar 4 stretches can be expanded to the range of the adhesion removal section 42, thereby preventing the stretching of the reinforcing bar 4 from being concentrated in a narrow section and preventing brittle fracture.

[0041] 7(a), a restricting member 113 may be provided in advance in the groove 111 of the wooden material 10, and when two wooden materials 10 are arranged in the same procedure as in FIGS. 3(a) and (b), the position of the reinforcing bar 4 may be restricted to the center of the hole 11 by the restricting member 113. This allows the reinforcing bar 4 to be reliably arranged in the center of the hole 11, making it less likely that breakage due to stress concentration will occur. As shown in the cross section perpendicular to the axis of the reinforcing bar 4 in FIG. 7(b), the restricting member 113 is, for example, a rod-like member extending from the groove 111, but the shape is not particularly limited.

[0042] In addition, although the embodiment has been described as an example of the joining of the wall 1 and the beam 3, the joining objects are not particularly limited as long as they are a combination of a structural member made of wood and another structural member. The joining structure C of the present invention can also be applied to joining, for example, columns to columns, beams to beams, slabs to slabs, columns and beams, beams and slabs, etc.

[0043] For example, in the example of Fig. 8(a), a pillar 2a of an upper layer made up of multiple wooden pieces 20 is joined to a pillar 2 of a lower layer. The pillar 2a is formed by stacking multiple wooden pieces 20 inside and outside, and at this time, a hole 21 that spans the inner and outer wooden pieces 20 is formed by combining grooves 211 provided on the opposing surfaces of the inner and outer wooden pieces 20. The reinforcing bar 4 protruding vertically from the pillar 2 of the lower layer is inserted into this hole 21, and the hole 21 is filled with a filler material 7, thereby joining the pillars 2 and 2a.

[0044] The combination of wooden pieces 20 varies depending on the arrangement of the reinforcing bars 4, and is not limited to the example shown in Fig. 8(a). For example, as shown in Fig. 9, a cross section perpendicular to the axis of the reinforcing bars 4, can form a hole 21 by grooves 211 in three wooden pieces 20, and can also form a hole 21 by grooves 211 in four or more wooden pieces 20. This also applies to the following examples.

[0045] In the example of FIG. 8(b), a beam 3a made of a plurality of wooden materials 30 is joined to an adjacent beam 3. The beam 3a is formed by stacking a plurality of wooden materials 30 vertically, and a hole 31 spanning the upper and lower wooden materials 30 is formed by a combination of grooves 311 provided on the opposing surfaces of the upper and lower wooden materials 30. The beams 3 and 3a are joined by inserting the reinforcing bar 4 protruding horizontally from the adjacent beam 3 into this hole 31 and filling the hole 31 with a filler material 7. Alternatively, the column 2 and the beam 3a can be joined by inserting the reinforcing bar 4 protruding horizontally from the side surface of the column 2 into the hole 31 of the beam 3a described above and filling the hole 31 with a filler material 7.

[0046] In the example of Fig. 8(c), a slab 6a made up of multiple plank-shaped wooden materials 60 is joined to an adjacent slab 6. The slab 6a is formed by stacking the plank surfaces of multiple wooden materials 60 one above the other, and a hole 61 is formed across the upper and lower wooden materials 60 by combining grooves 611 provided on the opposing surfaces of the upper and lower wooden materials 60. The reinforcing bars 4 protruding horizontally from the adjacent slab 6 are inserted into the holes 61, and the holes 61 are filled with filler material 7, thereby joining the slabs 6, 6a.

[0047] 8(d), a slab 6b made up of multiple plank-shaped wooden materials 60a is joined to the beam 3 below. The slab 6b is formed by overlapping the end faces of the left and right wooden materials 60a, and a hole 61 spanning the left and right wooden materials 60a is formed by combining grooves 611 provided on the opposing faces of the left and right wooden materials 60a. The reinforcing bars 4 protruding vertically from the lower beam 3 are inserted into the holes 61, and the holes 61 are filled with filler material 7, thereby joining the slab 6b and the beam 3.

[0048] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that such examples also naturally belong to the technical scope of the present invention. [Explanation of symbols]

[0049] 1: Wall 2, 2a: Pillar 3, 3a: Beam 4, 5: Reinforced concrete 6, 6a, 6b: Slabs 7: Filling material 10, 20, 30, 60, 60a: Wood 11, 11a, 11b, 21, 31, 61: Hole 41: Widening section 111, 111a, 111b, 211, 311, 611: groove 112: Recess 113: Regulatory member C:Joint structure

Claims

1. A joining structure for joining a structural member made of wood to another structural member, The structural member made of the wooden material is constructed by stacking a plurality of wooden materials, The plurality of wood materials have grooves on their opposing surfaces, and a hole is formed across the plurality of wood materials by combining the grooves. A rod protruding from the other structural member is positioned within the hole, and the hole is filled with a filler material; The structural component made of wood is a wall, and the joint structure is characterized in that it is formed by stacking multiple wooden boards in the out-of-plane direction.

2. The other structural member is a beam, 2. The joint structure according to claim 1, wherein the bar protruding vertically from the beam is disposed in the vertical hole provided in the wall.

3. 3. The joining structure according to claim 1, wherein a recess is formed on an inner surface of the hole.

4. 4. The joint structure according to claim 1, wherein the hole is gradually enlarged toward the end.

5. 5. The joint structure according to claim 1, wherein the rod is provided with a widened portion for fixing to the filler.

6. A method for joining a wooden structural member to another structural member, comprising the steps of: a step of arranging the wooden structural member such that the bar protruding from the other structural member is positioned within a hole in the wooden structural member; filling the holes with a filler material; Equipped with The structural member made of the wooden material is a wall, and is constructed by stacking a plurality of plank-shaped wooden materials in the out-of-plane direction, The plurality of wood pieces have grooves on their opposing surfaces, A joining method characterized in that the hole is formed so as to span the multiple wood pieces by combining the grooves.

Images