Joint structure and method for manufacturing the joint structure

Abstract

To provide a joint structure having excellent joint strength.SOLUTION: A joint structure has: a plurality of wooden plate materials having opposite surfaces opposite to each other in the right / left direction; a vertical plate material having an embedded part that is provided on the opposite surfaces and is embedded in the plurality of wooden plate materials and an upward projection part projecting upward; a binding material penetrating through the wooden plate material and the embedded part in the right / left direction; an upward projection part fastening part formed on the upward projection part; and a cement composition horizontal material for embedding the upward projection part and the upward projection fastening part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joint structure and a method for manufacturing the joint structure. [Background technology]

[0002] BACKGROUND ART A joint structure in which a wooden part such as a wooden beam and a horizontal member made of a cement composition such as a concrete slab are joined by a joint member is already well known (for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-118674 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional joint structure, connecting rods such as iron or steel rods are used as connecting members, and the lower part of the connecting rod is fixed to the wood part and the upper part is fixed to the cement composition horizontal member. However, such a joint structure cannot be said to have sufficient joint strength.

[0005] The present invention has been made in consideration of the above-mentioned problems in the prior art, and a main object of the present invention is to realize a joint structure having excellent joint strength. [Means for solving the problem]

[0006] The main invention relates to a method for making a wooden board having a plurality of wooden boards with opposing surfaces facing each other in the left-right direction, vertical boards provided on the opposing surfaces and having embedded portions embedded in the plurality of wooden boards and upward protruding portions projecting upward, binding members penetrating the wooden boards and the embedded portions in the left-right direction, upward protruding portion fixing portions formed on the upward protruding portions, and cement composition horizontal members for fixing the upper protruding portions and the upper protruding portion fixing portions, wherein fire-resistant materials are attached to cover the plurality of wooden boards on the left, right, and bottom sides, and the vertical boards embedded in the embedded portions reach the top surfaces of the fire-resistant materials attached to the bottom sides of the plurality of wooden boards. The plurality of wooden boards include a left LVL, a center LVL, and a right LVL, the vertical boards include a left iron plate between the left LVL and the center LVL, and a right iron plate between the center LVL and the right LVL, and the binding material includes a left screw that penetrates the left LVL and the left iron plate and reaches a position beyond the center of the center LVL, and a right screw that penetrates the right LVL and the right iron plate and reaches a position beyond the center of the center LVL. This is a joining structure characterized by the fact that

[0007] Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0008] According to the present invention, it is possible to realize a joint structure having excellent joint strength. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic longitudinal cross-sectional view showing a joint structure 1 according to the present embodiment, in which the normal direction (direction penetrating the paper surface) is along the depth direction. [Figure 2] FIG. 1 is a schematic vertical cross-sectional view showing a joint structure 1 according to the present embodiment, in which the normal direction (the direction penetrating the paper surface) is along the left-right direction. [Figure 3] 1 is a schematic perspective view showing a wooden beam 10 according to the present embodiment. [Figure 4] 1A to 1C are explanatory views for explaining a manufacturing method for manufacturing the joint structure 1 according to the present embodiment. [Figure 5] FIG. 1 is a schematic vertical cross-sectional view showing a joint structure 1 according to a first modified example. [Figure 6] FIG. 10 is a schematic vertical cross-sectional view showing a joint structure 1 according to a second modified example. [Figure 7] FIG. 10 is a schematic vertical cross-sectional view showing a joint structure 1 according to a third modified example. [Figure 8] FIG. 10 is a schematic vertical cross-sectional view showing a joint structure 1 according to a fourth modified example. [Figure 9] FIG. 10 is a schematic vertical cross-sectional view showing a joint structure 1 according to a fifth modified example. [Figure 10] FIG. 10 is a schematic perspective view showing a joint structure 1 according to a sixth modified example. [Figure 11] FIG. 10 is a schematic vertical cross-sectional view showing a joint structure 1 according to a seventh modified example. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present specification and the accompanying drawings make at least the following clear.

[0011] A joint structure characterized by having a plurality of wooden boards having opposing surfaces facing each other in the left-right direction, a vertical board material provided on the opposing surfaces and having an embedded portion that is embedded in the plurality of wooden boards and an upward protruding portion that protrudes upward, a binding material that penetrates the wooden boards and the embedded portion in the left-right direction, an upward protruding portion fixing portion formed on the upward protruding portion, and a cement composition horizontal material that embeds the upward protruding portion and the upward protruding portion fixing portion.

[0012] According to such a joint structure, it is possible to realize a joint structure having excellent joint strength. In such a joining structure, it is desirable that a plurality of the binding members are arranged side by side in the vertical direction.

[0013] Such a joining structure makes it possible to appropriately prevent the vertical plate members from rotating. In such a joint structure, it is desirable that the upper protrusion fixing portion is a rod member that passes through a hole formed in the upper protrusion.

[0014] According to such a joint structure, it is possible to further increase the fixing strength in the joint structure. In such a joining structure, it is desirable that the upper protrusion fixing portion is a hole portion formed in the upper protrusion.

[0015] According to such a joint structure, it is possible to simplify the configuration of the joint structure. In such a joining structure, it is desirable that the upward protruding portion fixing portion is a left-right protruding member that protrudes in the left-right direction from the upward protruding portion.

[0016] According to such a joint structure, it is possible to further increase the fixing strength in the joint structure. In such a joint structure, it is desirable that the cement composition horizontal member is a concrete slab, and the upward protrusion is a spacer for a reinforcing bar provided within the concrete slab.

[0017] With this type of joining structure, the vertical plate material can function not only as a joining member but also as a spacer, eliminating the need to provide a separate spacer and making it possible to reduce the number of parts.

[0018] Next, a manufacturing method for manufacturing a joint structure is provided with the following steps: a combination material forming step of forming a board combination material including a plurality of wooden boards having opposing surfaces facing each other in the left-right direction, vertical boards provided on the opposing surfaces and having embedded portions embedded in the plurality of wooden boards and upward protruding portions protruding upward, and a binding material penetrating the wooden boards and the embedded portions in the left-right direction; a fixing portion forming step of forming upper protruding portion fixing portions in the upper protruding portions; and an embedding step of embedding the upper protruding portions and the upper protruding portion fixing portions with a cement composition horizontal member.

[0019] According to this manufacturing method, it is possible to realize a joint structure with excellent joint strength. In the manufacturing method for manufacturing such a joint structure, it is preferable that the composite material forming step is performed in a factory and the embedding step is performed on-site.

[0020] According to this manufacturing method, it is possible to form the plate assembly with high precision.

[0021] === Joint structure 1 according to this embodiment === A joint structure 1 according to this embodiment will be described with reference to Figs. 1 to 3. Figs. 1 and 2 are schematic longitudinal cross-sectional views showing the joint structure 1 according to this embodiment. Fig. 1 shows a cross-section in which the normal direction (direction penetrating the paper) is along the depth direction (direction perpendicular to both the up-down direction and the left-right direction), and Fig. 2 shows a cross-section in which the normal direction (direction penetrating the paper) is along the left-right direction. Fig. 3 is a schematic perspective view showing a wooden beam 10 according to this embodiment.

[0022] This joint structure 1 is a joint structure that joins a wooden beam 10 (LVL 12) and a concrete slab 50, which is an example of a cement composition horizontal member. That is, the joint structure 1 includes the wooden beam 10 and the concrete slab 50.

[0023] The wooden beam 10 comprises an LVL 12 as an example of a wooden board material, a steel plate (in this embodiment, an iron plate 20) as an example of a vertical board material, screws 30, gypsum board 40, and laminated wood 42.

[0024] LVL 12 is a plank-shaped wood material made by laminating and gluing veneers with the same fiber direction, and is a long member with a rectangular cross section. In this embodiment, multiple (three) LVLs 12 (for convenience, referred to as left LVL 13, center LVL 14, and right LVL 15) are stacked in the left-right direction, and each LVL 12 is arranged so that its length direction is the depth direction, its width direction is the up-down direction, and its thickness direction is the left-right direction.

[0025] Therefore, the multiple (three) LVLs 12 have opposing surfaces 16 that face each other in the left-right direction. Specifically, the right surface 13a of the left LVL 13 faces the left surface 14a of the central LVL 14, and the right surface 14b of the central LVL 14 faces the left surface 15a of the right LVL 15, and these four surfaces form the opposing surfaces 16.

[0026] The steel plate 20 is a plate material extending in the vertical direction, and is used to join the wooden beam 10 (LVL 12) and the concrete slab 50. In the examples of Figures 1 and 2, the lengths of the steel plate 20 in the depth direction and vertical direction are 500 mm and 400 mm, respectively.

[0027] This iron plate 20 is provided so that one part (lower part) thereof is embedded in two adjacent LVLs 12 and is sandwiched between the two adjacent LVLs 12, and another part (upper part) thereof protrudes upward from the LVLs 12. That is, this iron plate 20 has an embedded part 21 provided on the opposing surface 16 and embedded in multiple LVLs 12, and an upward protruding part 22 protruding upward from the embedded part 21 (LVLs 12). In the example of Figures 1 and 2, the iron plate 20 is provided in the LVLs 12 so that the vertical length of the embedded part 21 of this iron plate 20 is 300 mm, and the vertical length of the upward protruding part 22 is 100 mm.

[0028] As described above, the iron plate 20 is embedded in two adjacent LVLs 12 so as to be sandwiched between them, but in this embodiment, there are two sets of adjacent LVLs 12 (left LVL 13 and central LVL 14, and central LVL 14 and right LVL 15), and an iron plate 20 is provided on both sets (i.e., between the left LVL 13 and central LVL 14 and between the central LVL 14 and right LVL 15) (for convenience, the iron plate 20 between the left LVL 13 and central LVL 14 will be called the left iron plate 20a, and the iron plate 20 between the central LVL 14 and right LVL 15 will be called the right iron plate 20b). The two iron plates 20 are opposed to each other in the left-right direction (opposite arrangement; see Figure 3). Furthermore, the left iron plates 20a and the right iron plates 20b are provided in multiple locations at appropriate intervals in the depth direction, and the intervals are the same length for the left iron plates 20a and the right iron plates 20b so that each left iron plate 20a and each right iron plate 20b faces each other appropriately.

[0029] The LVL 12 also has recesses 12a formed therein for fitting the iron plate 20 (embedded portion 21). Specifically, recess 12a for fitting the left iron plate 20a is formed at the right end of the left LVL 13, and recess 12a for fitting the right iron plate 20b is formed at the left end of the right LVL 15 (no recess is formed in the central LVL 14). This recess 12a has approximately the same shape as the embedded portion 21, and by fitting the iron plate 20 (embedded portion 21) into this recess 12a, the iron plate 20 is embedded in the LVL 12.

[0030] The screws 30 are components for fastening (integrating) multiple LVLs 12 together. Where the steel plate 20 is installed, the screws 30 also fasten (integrate) the LVLs 12 together. As shown in FIG. 2 , there are two types of screws 30: those that penetrate the LVLs 12 and the steel plate 20 (embedded portion 21) in the left-right direction, thereby fastening the LVLs 12 and the steel plate 20 together; and those that penetrate only the LVLs 12 in the left-right direction, thereby fastening multiple LVLs 12 together. In this embodiment, the same screws 30 are used for both types of screws. However, for ease of understanding, the following explanation will be simplified by referring to the former screws 30 as steel-plate-penetrating screws 30a (corresponding to the fastening material) and the latter screws 30 as non-steel-plate-penetrating screws 30b. Holes for the screws 30 to penetrate are pre-formed in the LVLs 12 and the steel plate 20.

[0031] 1, in this embodiment, as the iron plate penetrating screws 30a, a screw (for convenience, referred to as left screw 31) that penetrates the left LVL 13 and the left iron plate 20a to a position beyond the center of the central LVL 14, and a screw (for convenience, referred to as right screw 32) that penetrates the right LVL 15 and the right iron plate 20b to a position beyond the center of the central LVL 14 are provided. In other words, the left screw 31 reaches from the left end of the left LVL 13 to near the right end of the central LVL 14, and the right screw 32 reaches from the right end of the right LVL 15 to near the left end of the central LVL 14. Therefore, both the left screw 31 and the right screw 32 are present (overlapping) at the center position in the left-right direction of the central LVL 14.

[0032] Furthermore, to avoid physical interference between the left screw 31 and the right screw 32 due to this overlap, the positions of the left screw 31 and the right screw 32 are slightly offset in the up-down direction (in this embodiment, the right screw 32 is positioned slightly lower than the left screw 31). Note that the method for avoiding this physical interference is not limited to this, and the positions of the left screw 31 and the right screw 32 in the depth direction may also be offset.

[0033] In this embodiment, a plurality (two) of the iron plate penetrating screws 30a are provided vertically side by side. That is, for the left screws 31, a plurality (two) of the screws 30 are provided vertically side by side while penetrating the common iron plate 20 (i.e., the left iron plate 20a), and for the right screws 32, a plurality (two) of the screws 30 are provided vertically side by side while penetrating the common iron plate 20 (i.e., the right iron plate 20b).

[0034] The non-penetrating steel plate screws 30b are similar to the penetrating steel plate screws 30a, except that they do not penetrate the steel plate 20. That is, a left screw 31 and a right screw 32 are provided, and the left screw 31 penetrates the left LVL 13 and reaches a position beyond the center of the central LVL 14, while the right screw 32 penetrates the right LVL 15 and reaches a position beyond the center of the central LVL 14. The left screw 31 and the right screw 32 are slightly offset from each other in the vertical direction. Furthermore, multiple (two) non-penetrating steel plate screws 30b are also provided side by side in the vertical direction.

[0035] However, as shown in Fig. 2, the pitch (installation interval) of the screws 30 in the depth direction is different between the steel-plate penetrating screws 30a and the non-steel-plate non-penetrating screws 30b. That is, although a plurality of screws 30 are installed side by side in the depth direction, in order to further increase the degree of fixation of the steel plate 20 to the LVL 12, the interval L1 between adjacent steel-plate penetrating screws 30a is smaller than the interval L2 between adjacent non-steel-plate non-penetrating screws 30b and the interval L3 between adjacent steel-plate penetrating screws 30a and non-steel-plate non-penetrating screws 30b. In the example of Fig. 1, the interval L1 is set to 150 mm, and the intervals L2 and L3 are set to 200 mm.

[0036] As described above, in this embodiment, a plate assembly 11 is formed by combining the plate-shaped LVL 12 with a plate material including the steel plate 20 and screws 30. The plate assembly 11 plays the role of a load-bearing layer that forms the core of the wooden beam 10.

[0037] Additionally, gypsum boards 40 serving as fire-resistant materials are attached to the left, right, and bottom sides of the board assembly 11 with screws (not shown) so as to cover the board assembly 11. The gypsum boards 40 serve as a fire-retardant layer for the wooden beam 10. Additionally, laminated lumber 42 (covering portions) are attached to the left, right, and bottom sides of the gypsum boards 40 with adhesive (not shown) so as to cover the gypsum boards 40. The laminated lumber 42 is made by stacking wooden boards cut to a predetermined size in parallel and bonding them together with a synthetic resin adhesive. The laminated lumber 42 serves as the burning layer for the wooden beam 10. In this way, the wooden beam 10 is a fire-resistant structural beam having a load-bearing layer, a fire-retardant layer, and a burning layer. While laminated lumber 42 has been used as an example of the covering portion for covering the gypsum board 40, it may alternatively be solid wood, or a combination of laminated lumber 42 and solid wood.

[0038] A concrete slab 50 is provided above the wooden beam 10 (LVL 12) with the upward protruding portion 22 of the steel plate 20 buried in it. The concrete slab 50 according to this embodiment is an RC slab, and reinforcing bars 60 are provided within the concrete slab 50. That is, the reinforcing bars 60 are arranged above the wooden beam 10 (LVL 12), and concrete is poured so as to bury the reinforcing bars 60 and the upward protruding portion 22, thereby forming the concrete slab 50.

[0039] The reinforcing bars 60 in the concrete slab 50 are arranged so that multiple main reinforcements aligned in the left-right direction are lined up in the depth direction, and multiple distribution reinforcements aligned in the depth direction are lined up in the left-right direction. Therefore, the main reinforcements and distribution reinforcements are arranged in a grid pattern. In the example shown in Figures 1 and 2, the pitch (installation interval) of the main reinforcements in the depth direction and the pitch (installation interval) of the distribution reinforcements in the left-right direction are 150 mm.

[0040] These grid-like main reinforcements and distribution reinforcements are provided on the upper and lower sides of the concrete slab 50. That is, upper end main reinforcements 61 and upper end distribution reinforcements 62, which are the upper end reinforcements, are arranged on the upper side, and lower end main reinforcements 63 and lower end distribution reinforcements 64, which are the lower end reinforcements, are arranged on the lower side. In this embodiment, the upper end main reinforcement 61 is located above the upper end distribution reinforcement 62 in contact with it, and the lower end main reinforcement 63 is located below the lower end distribution reinforcement 64 in contact with it. The upper end main reinforcement 61 is located directly above the lower end main reinforcement 63, and the upper end distribution reinforcement 62 is located directly above the lower end distribution reinforcement 64.

[0041] The diameter of the reinforcing bar 60 is, for example, 10 mm or 13 mm, and in the example of FIGS. 1 and 2, a reinforcing bar 60 of 13 mm is used.

[0042] In this embodiment, the upper end 20c of the steel plate 20 (upper protruding portion 22) is located above the lower end main reinforcement 63, and therefore the lower end main reinforcement 63 is arranged by penetrating the steel plate 20. That is, the upper protruding portion 22 has a hole 23 formed therein, and the lower end main reinforcement 63 penetrates the hole 23.

[0043] The diameter of the holes 23 is slightly larger than the diameter of the reinforcing bars 60, for example, 20 mm to 50 mm, and in the example of Figures 1 and 2, 25 mm holes 23 are provided. Furthermore, a plurality of holes 23 are provided lined up in the depth direction to allow a plurality of bottom main reinforcements 63 lined up in the depth direction to pass through. The pitch (installation interval) of the holes 23 in the depth direction corresponds to the pitch (installation interval) of the bottom main reinforcements 63 in the depth direction, and is 150 mm in the example of Figure 1.

[0044] Also, as shown in Figure 2, in this embodiment, one lower end main reinforcement 63 is arranged so that it passes through both the hole 23 of the left iron plate 20a and the hole 23 of the right iron plate 20b.

[0045] The lower end main reinforcement 63 not only functions as a reinforcing bar in a so-called RC slab, but also functions as an anchoring part for anchoring the steel plate 20 to the concrete slab 50. That is, in this embodiment, the lower end main reinforcement 63, which is a rod material passing through the hole 23 formed in the upper protruding part 22, serves as an upper protruding part anchoring part formed in the upper protruding part 22 for anchoring the steel plate 20 to the concrete slab 50.

[0046] In this embodiment, the upper end main reinforcement 61 is arranged so that it rests on the upper end 20c of the steel plate 20 (upper protrusion 22). That is, instead of aligning the upper end 20c of the steel plate 20 with the upper end of the concrete slab 50 and making the vertical length of the upper protrusion 22 the same as the vertical length of the concrete slab 50, the vertical length of the upper protrusion 22 is made shorter than the vertical length of the concrete slab 50 so that the upper end main reinforcement 61 rests on the steel plate 20 (upper protrusion 22). In other words, the steel plate 20 (upper protrusion 22) not only functions to join the wooden beam 10 (LVL 12) and the concrete slab 50 but also functions as a spacer for the upper end main reinforcement 61. In other words, the steel plate 20 (upper protrusion 22) serves as a spacer for the reinforcing bars 60 (upper main reinforcement 61) provided within the concrete slab 50, and by setting the vertical length of the upper protrusion 22 to an appropriate value, it is possible to ensure an appropriate cover thickness. In the example of Figures 1 and 2, the vertical length of the concrete slab 50 is 150 mm, while the vertical length of the upper protrusion 22 is set to 100 mm. Because the diameters of the upper main reinforcement 61 and the upper distribution reinforcement 62 are both 13 mm, the cover thickness D is 150 - 100 - 13 = 37 mm, which makes it possible to fully ensure the appropriate cover thickness of 30 mm.

[0047] Also, as shown in Figure 1, in this embodiment, one upper main reinforcement 61 is placed on the left iron plate 20a and the right iron plate 20b, and the upper protrusion 22 of the left iron plate 20a and the upper protrusion 22 of the right iron plate 20b both serve as spacers for the upper main reinforcement 61.

[0048] As such, the joint structure 1 of this embodiment comprises a plurality of LVLs 12 having opposing surfaces 16 facing each other in the left-right direction, a steel plate 20 having an embedded portion 21 provided on the opposing surface 16 and embedded in the plurality of LVLs 12 and an upward protruding portion 22 that protrudes upward, a screw 30 that penetrates the LVLs 12 and the embedded portion 21 in the left-right direction, an upward protruding portion fixing portion (lower end main reinforcement 63) formed in the upward protruding portion 22, and a concrete slab 50 in which the upper protruding portion 22 and the upper protruding portion fixing portion are embedded.

[0049] This makes it possible to realize a joint structure 1 with excellent joint strength. That is, in the joint structure 1 according to this embodiment, a flat steel plate 20 is embedded in the opposing surfaces 16 of a plurality of LVLs 12 (i.e., sandwiched between adjacent LVLs 12), and the embedded portion 21 embedded in the opposing surfaces 16 and the LVLs 12 are fastened together with screws 30, thereby increasing the degree of fixation of the steel plate 20, which is the joining member, to the LVLs 12. This realizes a joint structure 1 with excellent joint strength, which allows for more appropriate transmission of shear force between the wooden beam 10 (LVL 12) and the concrete slab 50.

[0050] The joint structure 1 according to this embodiment also offers the following advantages. Simply by removing the screws 30, the wooden beam 10 (the plate assembly 11 comprising the aforementioned LVL 12, steel plates 20, and screws 30) can be easily disassembled, making it easy to reuse the LVL 12. Furthermore, because the steel plates 20 are used as the joint members, the degree of shear force transmission between the wooden beam 10 (LVL 12) and the concrete slab 50 can be easily set by appropriately adjusting the dimensions, pitch (installation interval), and number of steel plates 20.

[0051] In this embodiment, the upward protrusion 22 of the steel plate 20 serves as a spacer for the reinforcing bars 60 (upper end main reinforcements 61) provided in the concrete slab 50. In other words, the steel plate 20 functions not only as a joining member but also as a spacer. This eliminates the need to provide a separate spacer, making it possible to reduce the number of parts.

[0052] Next, a manufacturing method for manufacturing the above-mentioned joint structure 1 will be described with reference to Figures 1 to 4. Figure 4 is an explanatory diagram for explaining the manufacturing method for manufacturing the joint structure 1 according to this embodiment.

[0053] First, the plate material combination 11 is formed, which includes a plurality of LVLs 12 having opposing surfaces 16 facing each other in the left-right direction, an iron plate 20 having an embedded portion 21 provided on the opposing surface 16 and embedded in the plurality of LVLs 12, and an upward protruding portion 22 that protrudes upward, and a screw 30 that penetrates the LVLs 12 and the embedded portion 21 in the left-right direction (combination material formation process in step S1).

[0054] That is, multiple LVLs 12 (left LVL 13, center LVL 14, right LVL 15) are prepared and stacked in the left-right direction. Before stacking the LVLs 12, holes for passing screws 30 are formed in the three LVLs 12, and recesses 12a for fitting the iron plates 20 (embedded portions 21) are formed in the left LVL 13 and right LVL 15.

[0055] Then, by fitting the iron plate 20 (embedded portion 21) into the recess 12a, the iron plate 20 (left iron plate 20a and right iron plate 20b) is placed inside the LVL 12 so that its lower portion is sandwiched between two adjacent LVLs 12 (the iron plate 20 (embedded portion 21) is provided on the opposing surfaces 16 of the multiple LVLs 12) and its upper portion (upward protruding portion 22) protrudes from the LVL 12. Before placing the iron plate 20, holes for passing the screws 30 and holes 23 for passing the lower end main reinforcement 63 are formed in the iron plate 20.

[0056] Then, by inserting screws 30 into the holes, the LVL 12 and the iron plate 20 (embedded portion 21) are fastened together with the screws 30 where the iron plate 20 is provided, and multiple LVLs 12 are fastened together with the screws 30 where no iron plate 20 is provided. Through the above steps, the plate assembly 11 is formed.

[0057] Next, gypsum board 40 is attached to the board assembly 11 with screws so as to cover the board assembly 11, and laminated lumber 42 is attached with adhesive so as to cover the gypsum board 40. In this way, the wooden beam 10 with the connecting member (iron plate 20) shown in Fig. 3 is formed (wooden beam forming process in step S2).

[0058] The above steps (steps S1 and S2) are carried out in a factory, and the formed wooden beam 10 is brought to the construction site.

[0059] Next, the wooden beam 10 is installed at the construction site, and reinforcing bars 60 (upper end main reinforcement 61, upper end distribution reinforcement 62, lower end main reinforcement 63, lower end distribution reinforcement 64) are arranged on the upper side of the wooden beam 10 (reinforcing bar arrangement process in step S3). In this case, the lower end main reinforcement 63 is arranged so as to pass through the hole 23 of the upward protrusion 22 of the steel plate 20, and the upper end main reinforcement 61 is arranged so as to rest on the upper end 20c of the upward protrusion 22 of the steel plate 20. As described above, the lower end main reinforcement 63 is formed in the upward protrusion 22 and serves as an upward protrusion anchoring portion for anchoring the steel plate 20 to the concrete slab 50. Therefore, this reinforcing bar arrangement process can also be considered as an anchoring portion forming process for forming an upper protrusion anchoring portion in the upper protrusion 22.

[0060] Next, a mold for forming the concrete slab 50 is installed on the wooden beam 10 (the installation of such a mold may be performed before or in parallel with the reinforcement process), and concrete is poured into the installed mold to form the concrete slab 50. At this time, the reinforcing bars 60 and the upward protrusions 22 are embedded in the concrete slab 50 (embedding process of step S4). Through the above processes, the joint structure 1 according to this embodiment is manufactured.

[0061] As described above, the manufacturing method for manufacturing the joint structure 1 according to this embodiment includes a combination material forming process for forming a plate material combination material 11 including a plurality of LVLs 12 having opposing surfaces 16 facing each other in the left-right direction, a steel plate 20 having an embedded portion 21 provided on the opposing surface 16 and embedded in the plurality of LVLs 12 and an upper protruding portion 22 that protrudes upward, and a screw 30 that penetrates the LVLs 12 and the embedded portion 21 in the left-right direction; an anchoring portion forming process for forming an upper protruding portion anchoring portion (lower end main reinforcement 63) in the upper protruding portion 22; and an embedding process for embedding the upper protruding portion 22 and the upper protruding portion anchoring portion (lower end main reinforcement 63) in a concrete slab 50.

[0062] Therefore, as described above, it is possible to realize a joint structure with excellent joint strength.

[0063] The composite material forming step is carried out in a factory, and the embedding step is carried out on-site.

[0064] If the LVL 12, steel plates 20, and screws 30 were brought to the site and assembled on-site to form the plate assembly 11, the product precision of the plate assembly 11 would be lower than if they were assembled in a factory. In this embodiment, instead of bringing the components to the site, the plate assembly 11 is formed in advance in a factory and then brought to the site, making it possible to form the plate assembly 11, and ultimately the wooden beam 10, with high precision.

[0065] ===Other embodiments=== The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof. In particular, the embodiments described below are also included in the present invention.

[0066] In the above embodiment, the LVL 12 is used as an example of the wooden board material, but the present invention is not limited to this, and may be, for example, laminated wood.

[0067] Furthermore, in the above embodiment, the wooden beam forming process in step S2 is performed in a factory, but this is not limitative and it may be performed on-site.

[0068] Furthermore, in the above embodiment, multiple (two) screws 30 are provided in a vertical arrangement, but this is not limited thereto. For example, as shown in FIG. 5, only one screw 30 may be provided in a vertical arrangement. However, in the example of FIG. 5, there is a risk that the steel plate 20 may rotate in the direction indicated by the arrow when shear force is transmitted between the wooden beam 10 (LVL 12) and the concrete slab 50. Therefore, the above embodiment is preferable in that it can more appropriately prevent the rotation of the steel plate 20. Note that FIG. 5 is a view corresponding to FIG. 2 and is a schematic vertical cross-sectional view showing a joint structure 1 according to a first modified example.

[0069] In addition, in the above embodiment, the upper protruding portion fixing portion is described using an example of a rod material (lower end main reinforcement 63) that passes through the hole portion 23 formed in the upper protruding portion 22, but this is not limited to this.

[0070] FIG. 6 corresponds to FIG. 1 and is a schematic longitudinal cross-sectional view of a joint structure 1 according to a second modification. Unlike FIG. 1, FIG. 6 shows only the vicinity of the upper protrusion 22 in an enlarged view. In the above-described embodiment, the lower end main reinforcement 63 passing through the hole 23 of the upper protrusion 22 serves as the anchoring portion. However, in the second modification, the left-right protruding member protruding in the left-right direction from the upper protrusion 22—more specifically, the bolt 70 (a cut bolt in the second modification) and two nuts 72 provided in the hole 23 of the upper protrusion 22—serve as the anchoring portion. Note that in the second modification, the bolt 70 and nut 72 are provided in the hole 23, so the lower end main reinforcement 63 is secured just before the bolt 70 and nut 72 without passing through the hole 23 (i.e., the reinforcement is provided up to the bolt 70 and nut 72; hereinafter, this is referred to as "just before securing" for convenience). In the second modification, the lower end main reinforcement 63 is not connected to the bolt 70 and nut 72; however, they may be connected.

[0071] FIG. 7 is a view corresponding to FIG. 6 and is a schematic vertical cross-sectional view showing a joining structure 1 according to a third modified example. In FIG. 7, as in FIG. 6, only the vicinity of the upward protruding portion 22 is shown enlarged. In the second modified example, the bolt 70 and the nut 72 are used as examples of left-right protruding members that protrude in the left-right direction from the upward protruding portion 22. However, as shown in FIG. 7, the left-right protruding members may be studs 74 provided on at least one of the left and right sides of the upper protruding portion 22 (both in FIG. 7). In other words, in the third modified example, the studs 74 serve as anchoring portions.

[0072] 8 is a view corresponding to FIG. 2 and is a schematic vertical cross-sectional view showing a joint structure 1 according to a fourth modified example. In the above embodiment, the lower end main reinforcement 63 passes through the hole 23, and in the second modified example, a bolt 70 and a nut 72 are provided in the hole 23. However, in the fourth modified example, nothing is provided in the hole 23. In such a case, the hole 23 serves as the anchoring portion. That is, the upward protruding portion anchoring portion may be the hole 23 formed in the upward protruding portion 22.

[0073] In the fourth modified example, since nothing is provided in the hole 23, it is possible to provide the hole 23 with the function of passing coarse aggregate. Therefore, although the diameter of the hole 23 in the above embodiment is 20 mm to 50 mm, in order to ensure a sufficient diameter for passing coarse aggregate, in the fourth modified example, it is desirable to make the diameter larger than that in the above embodiment (for example, 30 mm to 50 mm).

[0074] In the fourth modified example, the width of the steel plate 20 is made smaller than that of the above embodiment (more specifically, the length L4 in the depth direction of the steel plate 20 is made shorter than the distance L5 between adjacent lower end main reinforcements 63), thereby realizing a state in which the lower end main reinforcements 63 do not pass through the holes 23 and nothing is provided in the holes 23. However, to realize such a state, it is also possible to adopt a stop that stops the lower end main reinforcements 63 just before the holes 23, as in the second and third modified examples.

[0075] Furthermore, in the second and third modified examples, the just-before-rear stop is adopted, but as in the fourth modified example, by reducing the width of the steel plate 20, it is also possible to configure the lower end main reinforcement 63 so that it is not necessary to penetrate the steel plate 20.

[0076] As described above, the upper protruding portion anchoring portion may be a rod that passes through the hole 23 formed in the upper protruding portion 22, a left-right protruding portion that protrudes left-right from the upper protruding portion 22, or the hole 23 formed in the upper protruding portion 22. Comparing the two, the former has the advantage of being able to further increase the anchoring force in the joint structure 1, while the latter has the advantage of being able to simplify the configuration of the joint structure 1. Note that in the above embodiment, the reinforcing bar 60 (lower end main reinforcement 63) has been described as an example of the rod, but it is not limited to this and may be a steel bar or the like.

[0077] Furthermore, in the above embodiment, an example in which three LVLs 12 (left LVL 13, center LVL 14, and right LVL 15) are stacked in the left-right direction has been described, but this is not limited thereto. For example, as shown in FIG. 9 , an example in which two LVLs 12 are stacked in the left-right direction may be used (fifth modified example). In the above embodiment, three LVLs 12 are stacked, and therefore a left iron plate 20a and a right iron plate 20b are provided facing each other in the left-right direction. However, in the fifth modified example, only one iron plate 20 is provided in the left-right direction. Therefore, while two screws 30 (left screw 31 and right screw 32) are provided in the left-right direction in the above embodiment, only one screw 30 is provided in the left-right direction in the fifth modified example. Note that FIG. 9 is a view corresponding to FIG. 1 and is a schematic vertical cross-sectional view schematically showing a joint structure 1 according to the fifth modified example.

[0078] In addition, in the above embodiment, the left iron plate 20a and the right iron plate 20b are opposed to each other in the left-right direction (opposite arrangement, see FIG. 3), but this is not limited to this. For example, as shown in FIG. 10, the left iron plate 20a and the right iron plate 20b may not be opposed to each other in the left-right direction, but may be arranged alternately along the depth direction (staggered arrangement) (sixth modified example). Note that FIG. 10 is a view corresponding to FIG. 3, and is a schematic perspective view showing a joining structure 1 according to the sixth modified example.

[0079] In the above embodiment, the vertical plate member is described as a member in which both the embedded portion 21 and the upward protruding portion 22 are made of plate material (steel plate), but this is not limited to this. For example, as shown in FIG. 11, the embedded portion 21 may be made of plate material (steel plate), while the upward protruding portion 22 may be a non-plate material (stud) that rises upward from the plate material (steel plate) (seventh modified example), and such an example is also within the scope of the present invention. In this case, the head of the stud functions as the anchoring portion for the upward protruding portion. Note that FIG. 11 corresponds to FIG. 2 and is a schematic vertical cross-sectional view showing a joining structure 1 according to the seventh modified example. [Explanation of symbols]

[0080] 1 Joint structure 10 wooden beams 11. Board Combination Materials 12 Lvl 12a Recess 13 Left LVL 13a Right side 14 Central LVL 14a left side 14b Right side 15 Right Level 15a left side 16 Opposite surface 20 Iron Plate 20a Left Iron Plate 20b Right Iron Plate 20c top end 21 Buried section 22 Upper protrusion 23 Hole 30 bis 30a Steel plate penetrating screw 30b Steel plate non-penetrating screw 31 Left screw 32 Right screw 40. Gypsum board 42 Laminated wood 50 Concrete slab 60 Reinforced concrete 61 Top main bar 62 Top distribution bar 63 Bottom main bar 64 Bottom distribution bar 70 volts 72 Nut 74 studs

Claims

1. A plurality of wooden boards having opposing surfaces facing each other in the left-right direction; a vertical board member provided on the opposing surface and having an embedded portion embedded in the plurality of wooden boards and an upward protruding portion protruding upward; a binding material that penetrates the wooden board and the embedded portion in the left-right direction; an upper protrusion fixing portion formed on the upper protrusion; A cement composition horizontal member that embeds the upward protrusion and the upward protrusion fixing portion; and A fireproof material is attached to cover the left, right, and bottom sides of the plurality of wooden boards, The vertical boards embedded in the embedding portion reach the upper surfaces of the fire-resistant materials attached to the lower sides of the plurality of wooden boards, The plurality of wooden boards include a left LVL, a center LVL, and a right LVL, The vertical plate member includes a left iron plate between the left LVL and the central LVL and a right iron plate between the central LVL and the right LVL, The binding material has a left screw that penetrates the left LVL and the left iron plate and reaches a position beyond the center of the central LVL, and a right screw that penetrates the right LVL and the right iron plate and reaches a position beyond the center of the central LVL. A joining structure characterized by:

2. The joining structure according to claim 1, A joining structure characterized in that the left screw and the right screw are misaligned in the vertical direction or in the depth direction.

3. The joining structure according to claim 1 or 2, A joining structure characterized in that the upper protrusion fixing portion is a rod material that passes through a hole formed in the upper protrusion.

4. The joining structure according to claim 1 or 2, A joining structure characterized in that the upper protrusion fixing portion is a hole portion formed in the upper protrusion.

5. The joining structure according to claim 1 or 2, A joining structure characterized in that the upward protruding portion fixing portion is a left-right protruding member that protrudes in the left-right direction from the upward protruding portion.

6. The joining structure according to any one of claims 1 to 5, The cement composition horizontal member is a concrete slab, A joint structure characterized in that the upward protrusion is a spacer for a reinforcing bar installed within the concrete slab.

7. A plurality of wooden boards having opposing surfaces facing each other in the left-right direction; a vertical board member provided on the opposing surface and having an embedded portion embedded in the plurality of wooden boards and an upward protruding portion protruding upward; a combination forming step of forming a board combination including a binding member that penetrates the wood board and the embedded portion in the left-right direction; a fixing portion forming step of forming an upper protrusion fixing portion on the upper protrusion; and an embedding step of embedding the upward protruding portion and the upward protruding portion fixing portion with a cement composition horizontal member, A fireproof material is attached to cover the left, right, and bottom sides of the plurality of wooden boards, The vertical boards embedded in the embedding portion reach the upper surfaces of the fire-resistant materials attached to the lower sides of the plurality of wooden boards, The plurality of wooden boards include a left LVL, a center LVL, and a right LVL, The vertical plate member includes a left iron plate between the left LVL and the central LVL and a right iron plate between the central LVL and the right LVL, The binding material has a left screw that penetrates the left LVL and the left iron plate and reaches a position beyond the center of the central LVL, and a right screw that penetrates the right LVL and the right iron plate and reaches a position beyond the center of the central LVL. A manufacturing method for manufacturing a joint structure characterized by the above.

8. A manufacturing method for manufacturing the joint structure according to claim 7, The assembly forming step is carried out in a factory, A manufacturing method for manufacturing a joint structure, wherein the embedding step is performed on-site.

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