Joint structure and method for forming a joint

Abstract

The present invention provides a joint structure and a joint formation method that facilitate the transmission of axial force between the upper and lower parts of the joint. [Solution] The joint structure comprises a wooden lower column 12, a wooden upper column 14 positioned above the lower column 12, a joint member 20 positioned between the lower column 12 and the upper column 14, with a steel material (vertical plate 26) and a filling material (concrete 40) positioned between the upper and lower plates, and a ventilation mechanism (ventilation groove 30B) formed above the filling material, which serves as a path for air to escape laterally from the space surrounded by the formwork 42 when the filling material is poured.

Description

Technical Field

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[0001] The present invention relates to a joint part structure and a method for forming a joint part.

Background Art

[0002] Patent Document 1 below shows a joining structure in which an opening for filling concrete is formed in a diaphragm constituting a joint member for joining a wooden column and a steel frame beam.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the joining structure shown in Patent Document 1 above, since the opening is blocked when the wooden column is connected to the diaphragm in which the opening is formed, concrete cannot be filled inside the joint member. Further, even if a filling hole for concrete filling is provided at another location, it is difficult for air to escape from the inside of the joint member when the wooden column is connected to the diaphragm, and there is a risk that the concrete will not be sufficiently filled. If the concrete is not sufficiently filled, the axial force that can be borne between the upper and lower parts of the joint part depends only on the steel material.

[0005] In consideration of the above facts, an object of the present invention is to provide a joint part structure and a method for forming a joint part that can easily transmit an axial force between the upper and lower parts of the joint part.

Means for Solving the Problems

[0006] The joint structure of claim 1 comprises a wooden lower column, a wooden upper column positioned above the lower column, a joint member positioned between the lower column and the upper column, with steel material and filler material positioned between upper and lower plates, and a ventilation mechanism formed above the filler material, which serves as a path for air to escape laterally from the space surrounded by the formwork when the filler material is poured.

[0007] In the joint structure of claim 1, when the filler material is filled between the upper and lower plates, air escapes from the space between the plates. As a result, air pockets are less likely to form in the filler material of the joint member. This makes it easier for the cement-based solidifying material to be densely filled between the upper and lower plates, and facilitates the transmission of the axial force acting on the upper column to the lower column via the steel and filler material. In other words, since the axial force can be borne not only by the steel but also by the filler material, a larger axial force can be borne, and the axial force can be easily transmitted between the upper and lower parts of the joint.

[0008] The joint structure of claim 2 is the joint structure of claim 1, wherein the ventilation mechanism comprises a through hole that penetrates vertically through the central part of the top plate on the upper column side of the plate, and a ventilation groove formed in an intermediate plate disposed between the top plate and the upper column, connecting the outer edge of the intermediate plate to directly above the through hole in a horizontal direction.

[0009] In the joint structure of claim 2, a ventilation groove, which serves as a ventilation mechanism, is provided in the intermediate plate between the upper column and the joint member. By providing such an intermediate plate, the height of the upper column can be adjusted. Furthermore, if both sides of the intermediate plate are blast-treated, shear force can be more easily transmitted between the intermediate plate and the top plate or upper column.

[0010] Furthermore, compared to cases where ventilation grooves are formed in the top plate or upper column, the cross-sectional loss of the top plate or upper column can be reduced, making it easier to ensure load-bearing capacity.

[0011] The joint structure of claim 3 is the joint structure of claim 1, wherein the ventilation mechanism is a ventilation groove formed in the top plate on the upper column side of the plate, and connects the outer edge of the top plate to the central part in a lateral direction.

[0012] In the joint structure of claim 3, air escapes through the ventilation groove in the top plate. Therefore, there is no need to provide an intermediate plate.

[0013] The joint structure of claim 4 is the joint structure of claim 1, wherein the ventilation mechanism comprises a through hole that penetrates vertically through the central part of the top plate on the upper column side of the plate, and a ventilation groove formed on the lower end surface of the upper column that connects horizontally from the outer edge of the upper column to directly above the through hole.

[0014] In the joint structure of claim 4, air escapes through the ventilation groove in the upper column. Therefore, there is no need to provide an intermediate plate.

[0015] The method for forming a joint according to claim 5 comprises the steps of: joining the base plate of a joint member in which a steel material is arranged between an upper top plate and a lower base plate to a wooden lower column; joining a wooden upper column to the top plate; arranging a formwork surrounding the steel material across the base plate and the top plate; and pouring a filler into the space while removing air laterally from the space surrounded by the base plate, the top plate and the formwork using a ventilation mechanism.

[0016] In the joint formation method of claim 5, when the filler material is filled between the top plate and the base plate, air escapes from the space between the plates. As a result, air pockets are less likely to form in the filler material that is filled into the joint member. This makes it easier for the filler material to be densely filled between the upper and lower plates, and for the axial force acting on the upper column to be transmitted to the lower column via the steel material and the filler material. In other words, since the axial force can be borne not only by the steel material but also by the filler material, a larger axial force can be borne, and the axial force can be easily transmitted between the upper and lower parts of the joint. [Effects of the Invention]

[0017] According to the present invention, it is easy to transmit the axial force between the upper and lower parts of the joint part.

Brief Description of the Drawings

[0018] [Figure 1] It is a perspective view showing the joint part structure according to an embodiment of the present invention. [Figure 2] It is a side sectional view showing the state before placing concrete in the joint part structure according to an embodiment of the present invention. [Figure 3] It is a side sectional view showing the state where concrete is placed using a formwork in the joint part structure according to an embodiment of the present invention. [Figure 4] It is a perspective view showing a modified example in which an intermediate plate is omitted in the joint part structure according to an embodiment of the present invention. [Figure 5] It is a perspective view showing another modified example in which an intermediate plate is omitted in the joint part structure according to an embodiment of the present invention. [Figure 6] (A) is a partially enlarged sectional view showing a modified example of the joint between the lower column and the joint member, and (B) is a partially enlarged sectional view showing another modified example.

Modes for Carrying Out the Invention

[0019] Hereinafter, the joint part structure and the joint part forming method according to the embodiment of the present invention will be described with reference to the drawings. Components denoted by the same reference numerals in each drawing mean the same components. However, unless otherwise specified in the specification, each component is not limited to one, and a plurality of them may exist.

[0020] In addition, the description of the overlapping components and reference numerals in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and appropriate changes can be made and implemented, such as omitting components, replacing with different components, and combining one embodiment and various modified examples within the scope of the object of the present disclosure.

[0021] <Joint part structure> The joint structure according to an embodiment of the present invention includes a lower column 12, an upper column 14, a joint member 20, and an intermediate plate 30. The lower column 12 and the upper column 14 are wooden columns, and are respectively disposed below and above the joint member 20.

[0022] (Joint member) The joint member 20 includes a base plate 22, a top plate 24, and a vertical plate 26.

[0023] The base plate 22 is a steel plate provided with a through hole 22A. For example, a lag screw bolt B1 is inserted into the through hole 22A from above. Further, the lag screw bolt B1 is screwed into the lower column 12. It is preferable to previously form a pilot hole at a position where the lag screw bolt B1 is to be screwed into the lower column 12. Thereby, the base plate 22 is fixed to the lower column 12.

[0024] The top plate 24 is a steel plate provided with through holes 24A and 24B. With an intermediate plate 30, which will be described later, sandwiched between the top plate 24 and the upper column 14, for example, a lag screw bolt B1 is inserted into the through hole 24A from below. Further, the lag screw bolt B1 is screwed into the upper column 14. It is preferable to previously form a pilot hole at a position where the lag screw bolt B1 is to be screwed into the upper column 14. Thereby, the top plate 24 is fixed to the upper column 14 with the intermediate plate 30 sandwiched therebetween. The through hole 24B will be described later.

[0025] The vertical plate 26 is a steel plate disposed across between the base plate 22 and the top plate 24. The lower end of the vertical plate 26 is welded to the base plate 22, and the upper end is welded to the top plate 24.

[0026] The vertical plate 26 is formed in a cross shape in plan view, and the in-plane direction of each piece is disposed perpendicular to the side surfaces of the lower column 12 and the upper column 14.

[0027] The central part of the vertical plate 26 protrudes outward, and a through hole 26A is formed in this protruding portion 26B. A bolt for fixing the steel beam to the joint member 20 via a splice plate (not shown) is inserted through this through hole 26A. Note that if a steel beam is not attached, the protruding portion 26B on the vertical plate 26 does not need to be provided.

[0028] (Intermediate plate) The intermediate plate 30 is a steel plate that is sandwiched and fixed between the top plate 24 and the upper column 14. The intermediate plate 30 is equipped with through holes 30A and ventilation grooves 30B. Note that the intermediate plate 30 is not limited to steel plate, and may be made of wood or other materials, for example.

[0029] The through-hole 30A is formed in the same position as the through-hole 24A of the top plate 24 when viewed from above. The lag screw bolt B1 inserted through the through-hole 24A is inserted through the through-hole 30A from below. This fixes the intermediate plate 30 in a state where it is sandwiched between the top plate 24 and the upper column 14. The ventilation groove 30B will be described later.

[0030] The surface of the intermediate plate 30 may be left in its raw state, but it may also be blast-treated on one or both sides to create a rough surface, or a cotter may be provided to create an in-plane shear mechanism.

[0031] (Ventilation mechanism) The through-hole 24B in the top plate 24 and the ventilation groove 30B in the intermediate plate 30 form a ventilation mechanism.

[0032] Specifically, four through-holes 24B are formed in the central part of the top plate 24. That is, they are formed in each of the sections of the top plate 24 that are separated by the four pieces forming the vertical plate 26. In addition, the through-holes 24B are formed near the inner corners formed by the vertical plate 26.

[0033] The ventilation groove 30B is a groove that connects the outer edge of the intermediate plate 30 to directly above the through hole 24B in a lateral direction, and is provided for each through hole 24B. As a result, as shown in Figure 2, when the joint member 20, the intermediate plate 30, and the upper column 14 are joined together, a ventilation mechanism is formed that connects the through hole 24B to the ventilation groove 30B.

[0034] (filling material) In the joint member 20, concrete 40, as shown in Figure 3, is poured between the base plate 22 and the top plate 24 as an example of a filler material. Note that high-strength concrete or fiber-reinforced concrete may be used instead of concrete 40, or a cement-based solidifying material such as mortar may be used instead. Alternatively, a gypsum-based self-leveling material can also be used.

[0035] In order to pour the concrete 40, first, as shown in Figure 2, the base plate 22 of the joint member 20 is joined to the lower column 12. Then, the upper column is joined to the top plate 24.

[0036] Next, as shown in Figure 3, formwork 42 surrounding the vertical plate 26 is placed across the base plate 22 and the top plate 24. The formwork 42 is positioned along the end faces of the base plate 22 and the top plate 24. This ensures that the planar shapes of the concrete 40, the base plate 22, and the top plate 24 match.

[0037] Furthermore, the formwork 42 has through holes 42A through which the protruding portion 26B of the vertical plate 26 is inserted. The formwork 42 "surrounding" the vertical plate 26 indicates that the formwork 42 surrounds the portion of the vertical plate 26 that bears the axial force from the upper column 14.

[0038] Then, concrete 40 is poured into the space enclosed by the base plate 22, the top plate 24, and the formwork 42. The concrete 40 can be poured by forming an injection hole (not shown) on the lower side of the formwork 42 and injecting it by pressure, for example, as indicated by arrow N.

[0039] At this time, air escapes laterally from the space within the formwork 42 through the through-holes 24B and ventilation grooves 30B, which serve as a ventilation mechanism, as indicated by arrow A. After the concrete 40 hardens, the ventilation mechanism is positioned above the concrete 40. The through-holes 24B and ventilation grooves 30B may ultimately be filled with concrete.

[0040] <Mechanism and Effects> According to the joint structure and joint forming method of the present invention, when concrete 40 is filled into the space between the base plate 22 and the top plate 24, air escapes from the space as shown by arrow A in Figure 3.

[0041] Specifically, air escapes through the through-holes 24B in the top plate 24 and the ventilation grooves 30B in the intermediate plate 30. As a result, air pockets are less likely to form in the concrete 40 compared to a system without such a ventilation mechanism. This makes it easier for the concrete 40 to be densely filled between the base plate 22 and the top plate 24, and facilitates the transmission of axial force acting on the upper column 14 to the lower column 12 via the vertical plate 26 and the concrete 40.

[0042] Furthermore, according to the joint structure and joint forming method of the present invention, a ventilation groove 30B, which serves as a ventilation mechanism, is provided in the intermediate plate 30 between the upper column 14 and the joint member 20.

[0043] By providing such an intermediate plate 30, the height of the upper column 14 can be adjusted. Specifically, by increasing the thickness of the intermediate plate 30, the position of the upper column 14 can be adjusted to a higher position. Conversely, by decreasing the thickness of the intermediate plate 30, the position of the upper column 14 can be adjusted to a lower position.

[0044] Furthermore, by applying blast treatment to both sides of the intermediate plate 30 or by providing cotters, the shear force of the joint member 20 with the top plate 24 and upper column 14 can be more easily transmitted.

[0045] Furthermore, compared to cases where ventilation grooves are formed in the top plate 24 or upper column 14, the cross-sectional loss of the top plate 24 or upper column 14 can be reduced, making it easier to ensure load-bearing capacity.

[0046] <Variation> In the above embodiment, a ventilation groove 30B as a ventilation mechanism is provided in the intermediate plate 30, but the embodiments of the present invention are not limited to this. For example, the intermediate plate 30 may be omitted. Omitting the intermediate plate 30 simplifies the configuration of the joint structure.

[0047] If the intermediate plate 30 is omitted, as an example, the top plate 24 of the joint member 20 can be provided with a ventilation groove 24C, as shown in Figure 4, instead of the through hole 24B shown in Figure 1. The ventilation groove 24C is a ventilation groove that connects the outer edge of the top plate 24 to the central part in a lateral direction.

[0048] When a ventilation groove 24C is provided in the top plate 24, it is preferable to provide a notch 42B in the upper end of the formwork 42 where it interferes with the ventilation groove 24C to ensure ventilation. Note that only one formwork 42 is shown in Figure 4 for reference.

[0049] Another example of omitting the intermediate plate 30 is to provide a ventilation groove 14B, as shown in Figure 5, on the lower end surface of the upper column 14. The ventilation groove 14B is a ventilator that connects the outer edge of the upper column 14 to directly above the through hole 24B of the top plate 24 in a horizontal direction.

[0050] Furthermore, in the above embodiment, the joint member 20 is fixed to the lower column 12 and the upper column 14 using lag screw bolts B1, but the embodiments of the present invention are not limited to this.

[0051] For example, as shown in Figure 6(A), the base plate 22 of the joint member 20 and the lower column 12 may be joined using a rod such as a bolt B2 and adhesive G.

[0052] In this example, an insertion hole 12A into which a bolt B2 is inserted is formed in the lower column 12. After inserting the bolt B2 into the insertion hole 12A, adhesive G is filled into the gap between the bolt B2 and the insertion hole 12A. After the adhesive G has hardened, a nut is screwed onto the bolt B2 to fix the base plate 22 to the lower column 12.

[0053] Alternatively, as shown in Figure 6(B), for example, a rod such as a bolt B3 may be fixed to the lower surface of the lower column 12. In this case as well, an insertion hole 12A into which the bolt B3 is inserted is formed in the lower column 12. After filling the insertion hole 12A with adhesive G, the bolt B3 is inserted into the insertion hole 12A while the adhesive G is still uncured. This fixes the base plate 22 to the lower column 12.

[0054] The joint structure shown in Figure 6(A) can also be used to connect the upper column 14 and the top plate 24.

[0055] Furthermore, in the examples shown in Figures 6(A) and (B), the adhesive G may be injected into the insertion hole 12A through an injection hole connecting the insertion hole 12A and the side surface of the lower column 12. This embodiment can also be used for joining the upper column 14 and the top plate 24. Thus, the present invention can be implemented in various embodiments. [Explanation of symbols]

[0056] 12 Lower pillar 14 Upper pillar 14B Ventilation groove (ventilation mechanism) 20 Joint members 22 Base Plate 24 Top Plate 24C ventilation groove (ventilation mechanism) 26. Vertical Plate (Steel) 30 Intermediate Plate 30A Through-hole (ventilation mechanism) 30B Ventilation groove (ventilation mechanism) 40. Concrete (filler) 42 formwork

Claims

1. Wooden base pillars, A wooden upper column is positioned above the lower column, A joint member is positioned between the lower column and the upper column, and steel material and filling material are arranged across the upper and lower plates, A ventilation mechanism is formed above the filler material, and when the filler material is poured, it provides a path for air to escape laterally from the space surrounded by the formwork. A joint structure equipped with this feature.

2. The aforementioned ventilation mechanism is, Of the aforementioned plates, the top plate on the upper column side has a through hole that penetrates vertically through the central part, A ventilation groove is formed in the intermediate plate positioned between the top plate and the upper column, connecting the outer edge of the intermediate plate to directly above the through hole in a lateral direction, The joint structure according to claim 1, comprising:

3. The aforementioned ventilation mechanism is, Of the aforementioned plates, the ventilation groove is formed in the top plate on the upper column side and connects the outer edge of the top plate to the central part in a lateral direction. The joint structure according to claim 1.

4. The aforementioned ventilation mechanism is, Of the aforementioned plates, the top plate on the upper column side has a through hole that penetrates vertically through the central part, A ventilation groove is formed on the lower end surface of the upper column and connects the outer edge of the upper column to the area directly above the through hole in a lateral direction. The joint structure according to claim 1.

5. The process involves joining the base plate of a joint member, in which a steel material is positioned between an upper top plate and a lower base plate, to a wooden lower column, The process of joining a wooden upper column to the top plate, A step of arranging the formwork surrounding the steel material across the base plate and the top plate, A step of pouring a filler material into the space while removing air laterally from the space surrounded by the base plate, the top plate, and the formwork using a ventilation mechanism, A method for forming a joint, comprising the features described above.

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