JP6985867B2 - Joined structure and gantry frame - Google Patents

Description

The present invention relates to structural members for construction, and particularly relates to laminated members based on wood, a joint structure between the laminated members, and a portal frame using the laminated members.

Among structural members for construction, as a laminated member based on wood, for example, those disclosed in Patent Document 1 are known. In the laminated member disclosed in Patent Document 1, a plurality of woods are laminated and joined together by using a fiber reinforced cement composite material as a joining material. It is described that the laminated member formed by such a method has a so-called sandwich structure in which wood and fiber reinforced cement are alternately layered, and is lightweight and boasts high heat retention, toughness, and load bearing capacity.

In the structural member disclosed in Patent Document 1, the cement layer is used only as a joining material, and is thinner than the wood layer. Further, since cement generally has a lower strength than concrete or mortar, it does not specifically describe how much the performance as a laminated member is as compared with a structure containing only wood.

Further, regarding the point that wood and concrete are simply combined in a building structure, Patent Document 2 discloses that a concrete layer is arranged on one side surface of the wood layer. In the technique disclosed in Patent Document 2, a concrete layer is cast on one surface of a so-called orthogonal laminated lumber that is laminated and formed so as to intersect the fiber directions. It is stated that such a configuration is lighter than a building material composed only of a concrete layer, and has improved fire resistance and soundproofing performance as compared with a building material composed only of a wood layer.

The structural member disclosed in Patent Document 2 can bring out the merits of both the wood layer and the concrete layer. However, the wood layer as a constituent member uses an orthogonal laminated lumber having a laminated structure, and the concrete layer has a thickness equal to or thicker than that of the wood layer, and has a structure in which reinforcing bars are arranged inside. Therefore, although it is lighter to use wood, it is clear that it has a considerable thickness and weight, and it is practically difficult to use it as a surface material in a skeleton.

Japanese Unexamined Patent Publication No. 2009-228361 Japanese Unexamined Patent Publication No. 2017-78307

In the present invention, a lightweight and thin laminated member that can fully exhibit the characteristics of a concrete layer (cement-based composition layer) and can also be used for the frame of a structure, and the laminated members are joined to each other. It is an object of the present invention to provide a joint structure to be formed and a portal frame formed by joining the laminated members.

The laminated member according to the present invention for achieving the above object includes a plurality of covering layers made of wood and a structure layer made of a cement-based composition filled between the covering layers. , The structure layer is configured to be thicker than the covering layer. As a result, a structural layer that is constrained on both sides is formed by wood that bears the tensile force, and a member that exhibits the strength and composition required to form a skeleton in cooperation with wood, not just as a joining material. Will be.

Further, in the laminated member having the above-mentioned characteristics, recesses or openings provided at predetermined intervals are provided on the side surface of the covering layer facing the structure layer, and the recesses or openings are described. Fill the cement-based composition to form a sheer key. By having such a feature, the bonding strength between the covering layer and the structure layer can be increased.

Further, the bonding structure according to the present invention is a bonding structure in which laminated members having the above characteristics are combined, and an exposed portion in which the structure layer is formed without providing the covering layer on one of the laminated members. The other laminated member is provided with a non-filled portion without the structure layer, and the exposed portion is inserted into the non-filled portion.

Further, in the joint structure having the above-mentioned characteristics, a connecting reinforcing bar protruding along the insertion direction of the exposed portion is arranged in the non-filled portion, and the connecting reinforcing bar is arranged in the exposed portion. A connection hole is provided at a position corresponding to the above, and the exposed portion is inserted into the non-filled portion so that the grout material is injected into the connection hole and the connection reinforcing bar is inserted into the connection hole. By having such a feature, it is possible to prevent a deviation between the exposed portion into which the unevenness is inserted and the non-filled portion. In addition, the connecting reinforcing bars are prevented from coming off, and the joint strength of the joint can be improved.

Further, the gantry frame according to the present invention is a gantry frame constructed by combining laminated members having the above characteristics into a gantry, and is a joint portion between the laminated members constituting columns and the laminated members constituting beams. It is characterized in that the joining structure having the above-mentioned characteristics is applied to the above.

Further, in the gantry frame having the above-mentioned characteristics, a plurality of the gantry frames are arranged in parallel in the stacking direction of the laminated members, and through holes are provided in each of the plurality of gantry frames arranged in parallel. A rod that penetrates each through hole is arranged and configured. By having such a feature, the gantry frames arranged adjacent to each other support each other, and high strength can be obtained as a structure.

According to the laminated member having the above-mentioned characteristics, the characteristics of the structure layer composed of the cement-based composition can be fully exhibited and high strength can be obtained. Further, by using wood for the covering layer, it is possible to realize a lightweight and thin laminated member that can be used for the wall surface of a structure or the like.

Further, according to the joint structure having the above-mentioned characteristics, the laminated members can be easily combined, and high strength can be obtained at the joint portion. Further, according to the gantry frame having the above-mentioned characteristics, it is possible to obtain a gantry frame with high strength while being thin and lightweight.

It is a figure which shows the structure of the laminated member which concerns on embodiment. It is a figure for demonstrating the manufacturing method of the laminated member which concerns on embodiment. It is a figure which shows the laminated member which provided the recess in the covering body layer, and formed the shear key. It is a figure which shows the laminated member which provided the through hole in the covering body layer, and formed the shear key. It is a figure which shows the example in the case of increasing the number of laminated structures in the laminated member which concerns on embodiment. It is a figure for demonstrating the joining structure of laminated members which concerns on embodiment, and is the exploded perspective view of the joining structure by the unevenness insertion. It is a figure for demonstrating the joining structure of laminated members which concerns on embodiment, and is the perspective view of the joining structure by the unevenness insertion. It is a figure which shows an example of the strength improving means in the case where a plurality of structures constructed by using a bonded structure are arranged in parallel. It is a figure for demonstrating the joining structure of laminated members which concerns on embodiment, and is the exploded perspective view of the joining of simple cross sections. It is an exploded perspective view which shows the 1st application example in the case of adopting the joint structure by the uneven insertion of laminated members which concerns on embodiment. It is an exploded perspective view which shows the 2nd application example in the case of adopting the joint structure by the uneven insertion of laminated members which concerns on embodiment. It is a front view which shows the example of the case where the laminated member which concerns on embodiment is joined together using the joining structure which concerns on embodiment, and the gate type frame | structure is formed. It is a plan view which shows the example of the case where the laminated member which concerns on embodiment is joined together using the joining structure which concerns on embodiment, and the gate type frame is formed. It is a figure which shows an example of the joint structure in the case where the laminated member which concerns on embodiment is arranged and used in parallel in the plate surface direction.

Hereinafter, embodiments of the laminated member and the portal frame of the present invention will be described in detail with reference to the drawings. It should be noted that the forms shown below are a part of the forms suitable for carrying out the present invention, and as long as the effect of the invention is exhibited, even if the shape or the like is changed, it can be regarded as a part of the present invention. Needless to say, you can do it.

[Basic configuration and manufacturing method]
As shown in FIG. 1, the laminated member 10 according to the present embodiment is basically composed of a covering layer 12 and a structure layer 14. The covering layer 12 is a layer made of wood, and it is preferable to use wood of a type used as a building material, such as cedar and cypress. The structure layer 14 may be any cement-based composition that can be cast, such as hardening from pouring, and may be general concrete composed of cement mixed with sand or gravel, fiber reinforced concrete, or the like. Examples thereof include ultra-high strength fiber reinforced concrete (trade name: DUCTAL (registered trademark)).

The laminated member 10 having such a component may be configured as follows. First, as shown in FIG. 2A, a formwork 16 for determining the thickness of the structure layer is arranged between the covering layers 12 which are arranged so as to form a pair. Next, as shown in FIG. 2B, the space covered by the covering layer 12 and the formwork 16 is filled with a cement-based composition for forming the structure layer 14. After the filled cement-based composition is cured, the formwork 16 is removed as shown in FIG. 2C to form the laminated member 10 according to the embodiment.

Therefore, the laminated member 10 has a so-called sandwich structure in which the structure layer 14 is sandwiched by the covering layer 12. The laminated member 10 according to the embodiment is configured so that the thickness of the structure layer is thicker than the thickness of the covering layer 12. This is because by allowing the structure layer 14 to have a predetermined thickness, the characteristics of concrete or the like, which is a cement-based composition, can be fully utilized, and high strength can be obtained. Further, by using wood as the covering layer 12 covering both main surfaces of the structure layer 14, the structure layer 14 is not directly heated by the flame in the event of a fire or the like. Therefore, it is possible to prevent a decrease in strength due to heating of the structure layer 14.

[effect]
According to the laminated member 10 having such a structure, it is possible to fully exhibit the characteristics of the cement-based composition layer. Further, since the weight can be reduced by using wood as the covering layer 12, the lightweight and thin laminated member 10 that can be used for the wall surface of the structure or the like can be obtained. Further, by adopting a structure in which the structure layer 14 made of the cement-based composition is sandwiched and supported by the covering layer 12 made of wood or the like, reinforcing members such as reinforcing bars are arranged inside the structure layer 14. It is not necessary to make the laminated member 10 thinner and lighter as a whole.

[Application form: Sheakey]
In the laminated member 10 having the above-mentioned structure, as shown in FIGS. 3 and 4, recesses 12a and through holes 12b can be provided on the surface of the covering layer 12 facing the structure layer 14. The shape of the recess 12a and the through hole 12b is not particularly limited, but when the recess 12a is formed, the cross-sectional shape may be a trapezoid (so-called dovetail shape) with the opening side as the short side.

When the cement-based composition constituting the structure layer 14 is filled between the covering layers 12 provided with the recesses 12a and the through holes 12b, the cement-based composition flows into the recesses 12a and the through holes 12b, and the shear key 14a Will be configured. As a result, the area of the contact surface between the covering layer 12 and the structure layer 14 can be increased, and the deviation in the direction along the joint surface can be suppressed. Further, when the recess 12a is formed into a dovetail shape, a wedge effect can be obtained, and the bonding strength between the covering layer 12 and the structure layer 14 can be improved.

[Application form: Multiple stacking]
In the above embodiment, it is described that the laminated member 10 arranges and forms the structure layer 14 so as to have a predetermined thickness between the pair of covering layers 12. However, when the structural member requires higher strength, it is preferable to increase the number of the covering layers 12 as shown in FIG. 5 and fill the structure layer 14 between the covering layers 12. ..

[Joining structure]
Further, in the laminated member 10 having the above-mentioned structure, two or more laminated members 10 can be joined to form a structure as follows.
In the joining structure, as shown in FIG. 6, two laminated members (temporarily referred to as a laminated member 10a and a laminated member 10b) to be joined are subjected to different end treatments. One end treatment applied to the laminated member 10a is an end treatment having a structure including an exposed portion 18 in which the structure layer 14 is exposed from between the paired covering layers 12. On the other hand, the other end treatment applied to the laminated member 10b is an end treatment having a structure including the non-filled portion 20 with respect to the structure layer 14 filled between the paired covering layers 12.

By applying the end treatment as described above to the laminated members 10a and 10b to be joined, one end treatment is applied to the unfilled portion 20 of the structure layer 14 to which the other end treatment is applied. It is possible to insert the exposed portion 18 formed by the above. Here, in the laminated member 10b provided with the unfilled portion 20, the bonded reinforcing bar 22 is arranged at the end of the structure layer 14 hidden by the covering layer 12. The joint reinforcing bar 22 does not need to be arranged in the entire structure layer 14, and it is sufficient that the other end portion having the same length as the end portion exposed from the structure layer 14 is embedded. This is because it is a reinforcing bar for joining (preventing coming off) rather than improving the strength of the structure layer 14.

Along with the arrangement of the joined reinforcing bars 22 with respect to the non-filled portion 20, the exposed portion 18 formed in the laminated member 10a is provided with a joining hole 24 at a position corresponding to the arrangement position of the joined reinforcing bars 22. In such a joining structure, the grout material is injected into the joining hole, and as shown in FIG. 7, the two laminated members 10a and 10b are unevenly inserted to complete the joining. The strength of the joint is also ensured by performing uneven fitting with the high-strength structure layer 14 as the core.

Further, when there are a plurality of structures configured by using the above-mentioned joint structure and a plurality of these are arranged in parallel as shown in FIG. 8, a through hole 26 is provided in each joint. You can do it. The through hole 26 is a hole whose penetration direction is the stacking direction of the components in the laminated members 10a and 10b.

By arranging rods 28 penetrating the through holes 26 provided in the plurality of structures, the effect of preventing the joints from coming off can be improved, and the resistance to the load in the stacking direction is enhanced. be able to.

In the above description, it is described that the joining structure is formed by the uneven fitting of the exposed portion 18 and the unfilled portion 20. However, as the joining structure using the laminated member 10 according to the embodiment, it is possible to join simple cross sections to each other. Specifically, as shown in FIG. 9, the bonded reinforcing bar 22 is arranged on the structure layer 14 exposed on the cross section of the end portion of one laminated member 10a, and is exposed on the cross section of the end portion of the other laminated member 10b. The joint hole 24 is formed in the structure layer 14. Even with such a structure, the two laminated members 10a and 10b can be joined by injecting a grout material into the joining hole 24 and joining the two.

[Application of joint structure]
In the above description, it has been described that the joining structure is composed of two laminated members 10 (10a, 10b), each of which is subjected to end treatment and then unevenly inserted into the two laminated members 10. However, the joining structure according to the embodiment is not necessarily limited to joining end portions.

For example, as shown in FIG. 10, when the laminated member 10b constituting the intermediate support is joined to the laminated member 10a constituting the beam, the exposed portion 18 can be provided at a portion other than the end portion. Further, as shown in FIG. 11, when the laminated member 10a constituting the beam is joined to the intermediate portion of the laminated member 10b constituting the column, the structure is formed in the intermediate portion of the laminated member 10b constituting the column. It is also possible to form the unfilled portion 20 of the body layer 14 and insert the exposed portion 18 into the portion (so-called relationship between the hozo and the hozo hole).

[Structure]
The laminated member 10 having the above-mentioned structure has sufficient strength to be used as a building material. Therefore, the structure can be constructed by using the above-mentioned joint structure. For example, FIG. 12 is a front view showing an example of forming a gate-shaped frame 30 using the laminated member 10 according to the embodiment, and FIG. 13 is a diagram showing a plan configuration of the gate-shaped frame 30 shown in FIG. Is.

According to FIG. 12, the joint structure by the above-mentioned uneven fitting is adopted for the joint portion between the laminated member 10b constituting the column and the laminated member 10a constituting the beam. On the other hand, a joining structure of simple cross sections is adopted for the joining portion that extends the length of the joining member 10a constituting the beam.

Further, as shown in FIG. 13, by arranging a plurality of gantry frames 30 having the same shape in parallel and connecting them with rods 28, the gantry frames 30 arranged adjacent to each other support each other as a structure. It is possible to improve the strength of the.

In the above embodiment, in order to show the characteristics of the laminated member 10 according to the embodiment, the point that the structure can be formed by the laminated member 10 itself is disclosed. However, the laminated members 10 according to the embodiment can be used for various purposes such as wall materials and floor materials by arranging them in parallel in the plate surface direction. Here, when applied to an application in which the laminated members 10 are arranged in parallel in the plate surface direction, as shown in FIG. 14, exposed portions 18 of the structure layer 14 are provided on one side surface of the laminated members 10, and each of them is provided. The laminated member 10 may be configured to be connectable by inserting unevenness.

10 (10a, 10b) ………… Laminated member, 12 ………… Cover layer, 12a ………… Recess, 12b ………… Through hole, 14 ………… Structure layer, 14a ………… Shea key, 16 …… … Formwork, 18 ……… exposed part, 20 ……… unfilled part, 22 ……… joint reinforcing bar, 24 ……… joint hole, 26 ……… through hole, 28 ……… rod, 30 ……… Gate type frame.

Claims (4)

A plurality of covering layers made of wood and a structure layer made of a cement-based composition filled between the covering layers are provided so that the structure layer is thicker than the covering layer. It is a joint structure that combines laminated members configured in
One laminated member is provided with an exposed portion on which the structure layer is formed without providing the covering layer.
The other laminated member is provided with a non-filled portion without the structure layer.
A joining structure characterized in that the exposed portion is inserted into the non-filled portion. In the non-filled portion, a connecting reinforcing bar protruding along the insertion direction of the exposed portion is arranged.
A connection hole is provided in the exposed portion at a position corresponding to the arrangement position of the connection reinforcing bar.
The joining according to claim 1 , wherein the exposed portion is inserted into the unfilled portion so that the grout material is injected into the connection hole and the connecting reinforcing bar is inserted into the connection hole. structure. A plurality of covering layers made of wood and a structure layer made of a cement-based composition filled between the covering layers are provided so that the structure layer is thicker than the covering layer. It is a gate-shaped frame that is constructed by combining the laminated members configured in the above into a gate-shaped structure.
A gantry frame frame characterized in that the joint structure according to claim 1 or 2 is applied to a joint portion between a laminated member constituting a column and a laminated member constituting a beam. A plurality of the portal frames are arranged in parallel in the stacking direction of the laminated members.
Through holes are provided in each of the plurality of gate-shaped frames arranged in parallel.
The gantry frame according to claim 3 , wherein rods penetrating each through hole are arranged and configured.

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