JP7214995B2 - WOODEN BEAM MEMBER AND METHOD FOR MANUFACTURING WOODEN BEAM MEMBER - Google Patents

Description

TECHNICAL FIELD The present invention relates to a wooden beam member and a method for manufacturing the wooden beam member.

In a wooden building, if the beam member (wooden beam member) is made to have a large span (long span), the deflection tends to increase (see, for example, Patent Document 1). Therefore, in order to realize a large-span frame structure in a wooden building, it is necessary to increase the cross-sectional area of wooden beam members and increase the member strength.

JP 2015-175119 A

However, if the cross-sectional area of the wooden beam member is increased, there is a possibility that the manufacturing factory will be limited and the cost will increase due to transportation problems.

The present invention has been made in view of such problems, and an object of the present invention is to reduce costs.

In order to achieve such an object, the wooden beam member of the present invention comprises a first wooden board, a second wooden board laminated in the thickness direction of the first wooden board, the first wooden board and the second wooden board. Structural screws or drift pins that penetrate the board in the thickness direction and fix the first wooden board and the second wooden board are provided, and the contact between the first wooden board and the second wooden board is provided. In the wooden beam member arranged so that the surface is parallel to the vertical direction, at least one of the surface of the first wooden plate member and the surface of the second wooden plate member forming the contact surface has the vertical direction and a groove along the length direction perpendicular to the thickness direction, and a reinforcing material is arranged in the groove.
According to such a wooden beam member, since the reinforcing member is provided inside, the strength can be increased, and the cross-sectional area does not need to be increased. Thereby, the cost can be reduced.

In such a wooden beam member, it is desirable that the reinforcing member is a member made of glass fiber.
Such a wooden beam member can be increased in strength and can be used outdoors because it does not rust. In addition, because of its light weight, workability is also improved.

In such a wooden beam member, it is preferable that the groove is provided below the central position of the wooden beam member in the vertical direction.
Such a wooden beam member can be efficiently reinforced.

In such a wooden beam member, it is desirable that the grooves are not provided at both ends of the beam member in the length direction.
According to such a wooden beam member, it is possible to easily join a joining member (such as a gusset plate) to a column member or the like. In addition, it is possible to prevent the reinforcing member 30 from being exposed to the outside.

In such a wooden beam member, it is desirable that an adhesive be filled between the groove and the reinforcing member.
According to such a wooden beam member, the reinforcing material can be fixed.

In such a wooden beam member, the reinforcing member has a fixing portion having a larger diameter than other portions at the end in the length direction, and the groove portion has the fixing portion at the end in the length direction. It is desirable that a fixing groove portion having a size corresponding to the size of the fixing groove portion be provided, and an adhesive be filled between the fixing portion and the fixing groove portion.
According to such a wooden beam member, the amount of adhesive used can be reduced compared to the case where the entire groove is filled with adhesive, and the cost can be reduced.

In such a wooden beam member, it is desirable that the first wooden board member and the second wooden board member are laminated without using an adhesive except for the inside of the groove.
With such a wooden beam member, the cost can be reduced.

In order to achieve such an object, a method for manufacturing a wooden beam member according to the present invention includes a first wooden board and a second wooden board laminated in a thickness direction of the first wooden board, 1. A method for manufacturing a wooden beam member in which a contact surface between a wooden board member and a second wooden board member is arranged so as to be parallel to a vertical direction, the surface of the first wooden board member constituting the contact surface comprising: Forming a groove along a length direction orthogonal to the vertical direction and the thickness direction; filling the groove with an adhesive and arranging a reinforcing material; and before the adhesive is cured, a step of superimposing the second wooden board on the surface side of the first wooden board; inserting structural screws or drift pins into the first wooden board and the second wooden board in the thickness direction ; and fixing the first wooden board and the second wooden board.
According to this method of manufacturing a wooden beam member, since only the surface of each wooden board member is processed, the cost can be reduced, and the reinforcing material can be easily provided inside the wooden beam member. can.

In order to achieve such an object, a method for manufacturing a wooden beam member according to the present invention includes a first wooden board and a second wooden board laminated in a thickness direction of the first wooden board, 1. A method for manufacturing a wooden beam member in which a contact surface between a wooden board member and a second wooden board member is arranged so as to be parallel to a vertical direction, the surface of the first wooden board member constituting the contact surface comprising: Forming a first groove along a length direction orthogonal to the vertical direction and the thickness direction; filling the first groove with an adhesive and arranging a reinforcing material; and configuring the contact surface. forming a second groove along the longitudinal direction on the surface of the second wooden board so as to correspond to the first groove; filling the second groove with the adhesive; Before the adhesive in the first groove and the second groove hardens, the first wooden board and the second wooden board are overlapped so that the reinforcing member is surrounded by the first groove and the second groove. and a step of inserting structural screws or drift pins into the first wooden board and the second wooden board in the thickness direction to fix the first wooden board and the second wooden board. , characterized in that
According to such a method for manufacturing a wooden beam member, it is possible to reduce the cost and improve the fire resistance.

According to the present invention, cost reduction can be achieved.

1A is a side view of the wooden beam member 10 of the first embodiment, and FIG. 1B is a cross-sectional view along line AA of FIG. 1A. 2A to 2E are explanatory diagrams showing an example of a method for manufacturing the wooden beam member 10 of the first embodiment. 3A to 3E are explanatory diagrams showing a modification of the method for manufacturing the wooden beam member 10 of the first embodiment. 11A and 11B are cross-sectional views of the wooden beam member 10 of the second embodiment (cross-sectional view at a position corresponding to FIG. 1B). 5A to 5E are explanatory diagrams showing an example of a method for manufacturing the wooden beam member 10 of the second embodiment. 6A is a side view of the wooden beam member 10 of the third embodiment, FIG. 6B is a sectional view along line AA of FIG. 6A, and FIG. 6C is a sectional view along line BB of FIG. 6A.

An embodiment of the present invention will be described below with reference to the drawings.

===First embodiment===
<<Regarding the configuration of the wooden beam member 10>>
1A is a side view of the wooden beam member 10 of the first embodiment, and FIG. 1B is a cross-sectional view along line AA of FIG. 1A. In FIG. 1A, a part of the wooden beam member 10 (the vicinity of the groove 11A of the wooden board 11) is shown transparently in order to facilitate understanding of the configuration of the groove 11A.

The wooden beam member 10 of the present embodiment is a beam of a wooden building, and is a member that horizontally connects pillars (not shown). When forming a large-span frame structure in a wooden building, it is necessary to increase the cross-sectional area of the wooden beam member 10 and increase the strength of the member. If the cross-sectional area is increased, there is a risk that manufacturing plants will be limited and costs will increase due to transportation problems. Therefore, in this embodiment, a reinforcing material 30 (described later) is provided inside the wooden beam member 10 to increase the strength of the member. In this embodiment, three directions (vertical direction, length direction, and thickness direction) that are orthogonal to each other are defined as shown in the drawing. Note that the length direction and the thickness direction are two directions (horizontal directions) that are orthogonal to each other on a horizontal plane perpendicular to the vertical direction. The thickness direction is the normal direction of the surface of the board (the wooden boards 11, 12, and 13), and the length direction is the longitudinal direction of the wooden beam member 10 (direction connecting the pillars).

The wooden beam member 10 includes wooden board members 11 , 12 and 13 , binding members 20 and reinforcing members 30 .

Each of the wooden boards 11, 12, and 13 is a plate-shaped laminated veneer lumber (LVL). The wooden beam member 10 is constructed by laminating these three plate members in the thickness direction (specifically, by laminating the wooden plate member 12 in the thickness direction so as to sandwich the wooden plate member 11 and the wooden plate member 13). . The wooden beam member 10 is arranged so that the contact surfaces of the respective plate members (the wooden plate members 11, 12, and 13) are parallel to the vertical direction. The length of each board (the wooden board 11, 12, 13) is preferably 5 m to 12 m, the width (length in the vertical direction) is preferably 300 mm to 1200 mm, and the thickness is preferably 75 mm to 150 mm.

Further, the wooden board 11 is provided with a groove portion 11A on the lower side of the contact surface with the wooden board 12 (below the central position in the vertical direction). The groove portion 11A is a concave portion on the surface of the wooden board 11, and is formed along the length direction as shown in FIG. 1A. Further, the depth (length in the thickness direction) and width (length in the vertical direction) of the groove portion 11A are formed to be large enough to accommodate the reinforcing member 30 (slightly larger than the outermost diameter of the reinforcing member 30). It is Specifically, when the outer diameter of the reinforcing member 30 is 22 mm, the depth and width of the groove 11A are 26 mm to 28 mm (+4 mm to +6 mm).

Since the groove 11A is provided on the surface of the wooden board 11 in this way, when the wooden board 11 and the wooden board 12 are superimposed (stacked), a space formed by the groove 11A (a space for accommodating the reinforcing member 30) is formed. will be formed. The grooves 11A are not provided at both longitudinal ends of the wooden board 11 (specifically, within a range of about 100 mm from each longitudinal end). As a result, when joining the end portion of the wooden beam member 10 to a column member or the like, joining members (such as a gusset plate) can be easily joined. Furthermore, it is possible to prevent the reinforcing member 30 from being exposed to the outside.

Further, the wooden plate 13 is provided with a groove portion 13A on the lower side of the contact surface with the wooden plate 12 (lower than the central position in the vertical direction). Like the groove 11A, the groove 13A is a recessed portion on the surface of the wooden board 13, and is formed along the length direction. The depth and width of the groove 13A are the same as those of the groove 11A.

Since the groove 13A is provided on the surface of the wooden board 13 in this way, when the wooden board 13 and the wooden board 12 are superimposed (stacked), a space formed by the groove 13A (a space for accommodating the reinforcing member 30) is formed. will be formed. As with the groove 11A, the groove 13A is not provided at both ends of the wooden board 13 in the longitudinal direction.

The binding material 20 is a member for fixing the wooden board materials 11, 12, and 13 in a laminated state, and is penetrated in the thickness direction. As shown in FIG. 1A, the wooden beam member 10 is provided with a plurality of binding members 20 spaced apart from each other. By using the binding material 20 in this manner, the wooden board members 11, 12, and 13 can be laminated without using an adhesive, and cost reduction can be achieved. Structural screws, drift pins, bolts, etc. can be used as the binding material 20 .

The reinforcing member 30 is a member having a higher strength than wood-based materials. In this embodiment, rod-shaped glass fiber lines having a circular cross section are used as the reinforcing members 30 . The glass fiber muscle is a member (glass fiber purified plastic) made by mixing glass fiber with plastic (resin), and has extremely high strength while being lightweight. Also, fiberglass bars are corrosion resistant. That is, since the reinforcing member 30 of this embodiment does not rust, it can be used outdoors. In addition, because of its light weight, workability is also improved.

The reinforcing member 30 is provided in the groove 11A of the wooden board 11 (more specifically, in the space formed by the groove 11A and the wooden board 12) and in the groove 13A of the wooden board 13 (more specifically, the groove 13A). and the wooden board 12). That is, the reinforcing member 30 is provided below the central position of the wooden beam member 10 in the vertical direction. This enables efficient reinforcement. In this embodiment, the reinforcing member 30 has a diameter (outermost diameter) of 13.5 mm to 34 mm and a length of 5.8 m to 11.8 m. Further, the adhesive 40 is filled around the reinforcing member 30 in each groove. The adhesive 40 is, for example, an epoxy resin-based adhesive, and fixes the reinforcing member 30 by curing.

Thus, in the wooden beam member 10 of the present embodiment, since the reinforcing member 30 is provided inside, it is not necessary to increase the cross-sectional area even when the span is increased (when the reinforcing member 30 is not provided, It is possible to reduce the cross-sectional area compared to ). Therefore, manufacturing and transportation are facilitated, and costs can be reduced.

<<About manufacturing method>>
2A to 2E are explanatory diagrams showing an example of a method for manufacturing the wooden beam member 10 of the first embodiment.

First, as shown in FIG. 2A, grooves 11A are formed along the longitudinal direction on the surface of the wooden board 11 (the surface facing the wooden board 12). The groove portion 11A is filled with the adhesive 40 and the reinforcing material 30 is inserted.

Before the filled adhesive 40 hardens, the wooden board 11 is covered with the wooden board 12 as shown in FIG. 2B (overlapped).

Then, as shown in FIG. 2C, the binding material 20 is inserted into the wooden board 11 and the wooden board 12 in the thickness direction, and the wooden board 11 and the wooden board 12 are fixed.

Next, as shown in FIG. 2D, a groove 13A is formed in the surface of the wooden board 13 (the surface facing the wooden board 12), filled with an adhesive 40, and a reinforcing member 30 is inserted.

Moreover, before the adhesive 40 hardens, the laminated body of FIG. 2C is turned upside down and put on the wooden board 13 (overlapped).

Then, as shown in FIG. 2E, the laminate (laminate of wooden boards 11, 12, 13) formed in FIG. The wooden board 13 and the wooden board 12 are fixed by penetrating in the direction.

Thus, in this embodiment, the reinforcing member 30 can be easily provided inside the wooden beam member 10 .

<Modification>
3A to 3E are explanatory diagrams showing a modification of the method for manufacturing the wooden beam member 10 of the first embodiment.

The process until the wooden board 12 is superimposed on the wooden board 11 (FIGS. 3A and 3B) is the same as that of the above-described embodiment (FIGS. 2A and 2B), so the description is omitted.

In this modified example, as shown in FIG. 3C, the wooden board 11 and the wooden board 12 are turned upside down and the binding material 20 is inserted into the wooden board 11 and the wooden board 12 in the thickness direction. and the wooden board 12 are fixed.

Next, as shown in FIG. 3D, a groove 13A is formed in the surface of the wooden board 13 (the surface facing the wooden board 12), and the groove 13A is filled with the adhesive 40 and the reinforcing material 30 is inserted. . Also, before the adhesive 40 hardens, the laminate shown in FIG.

Then, as shown in FIG. 3E, the laminate (laminate of wooden boards 11, 12, 13) formed in FIG. to fix the wooden board 13 and the wooden board 12 .

Also in this modified example, the reinforcing member 30 can be easily provided inside the wooden beam member 10 .

=== Second Embodiment ===
<<Regarding the configuration of the wooden beam member 10>>
FIG. 4 is a cross-sectional view of the wooden beam member 10 of the second embodiment (a cross-sectional view of a position corresponding to FIG. 1B). It is constructed by stacking three plate materials (wooden plate materials 11, 12, 13) in the thickness direction. A binding material 20 is inserted into these plate members to fix the plate members. However, in the second embodiment, grooves are formed on both sides of the surface of each plate member that constitutes the contact surface.

For example, at the contact surface between the wooden board 11 and the wooden board 12, the groove 11a is formed on the surface of the wooden board 11 along the length direction, and the groove 12a is formed on the surface of the wood board 12 along the length direction. formed by The grooves 11a and 12a are shallower than the grooves 11A of the first embodiment (here, the grooves each have a depth of 14 mm), and the grooves 11a and 12a are arranged to face each other. As a result, the depth (28 mm) is equivalent to that of the groove 11A of the first embodiment.

A reinforcing member 30 is arranged inside the groove portion 11a and the groove portion 12a. Further, an adhesive 40 is filled around the reinforcing member 30 (the gap between the grooves 11a and 12a and the reinforcing member 30).

At the contact surface between the wooden board 12 and the wooden board 13, a groove 12b is formed on the surface of the wooden board 12 along the length direction, and a groove 13a is formed on the surface of the wooden board 13 along the length direction. It is The depths of the grooves 12b and 13a are the same as those of the grooves 11a and 12a.

A reinforcing member 30 is arranged inside the groove portion 12b and the groove portion 13a. Further, an adhesive 40 is filled around the reinforcing member 30 (the gap between the grooves 12b and 13a and the reinforcing member 30).

<<About manufacturing method>>
5A to 5E are explanatory diagrams showing an example of a method for manufacturing the wooden beam member 10 of the second embodiment.

First, as shown in FIG. 5A, grooves 12a are formed along the longitudinal direction on the surface of one side of the wooden board 12 (the side facing the wooden board 11). A groove 12b is formed in the surface of the wooden board 12 on the other side (the side facing the wooden board 13) along the length direction. Then, the groove portion 12a is filled with the adhesive 40 and the reinforcing member 30 is inserted. Since the depth of groove 12 a is smaller than the diameter (outer diameter) of reinforcing member 230 , reinforcing member 30 partially protrudes from the surface of wooden plate 12 .

Next, as shown in FIG. 5B, grooves 11a are formed along the longitudinal direction on the surface of the wooden board 11 (the surface facing the wooden board 12). The groove portion 11a is filled with an adhesive 40, and the wooden board 12 is put on the wooden board 11 before the adhesive 40 is hardened (overlapped). As a result, the wooden board 11 and the wooden board 12 are laminated, and the reinforcing member 30 is surrounded by the grooves 11a and 12a (arranged inside the grooves 11a and 12a).

Then, as shown in FIG. 5C, the binding material 20 is inserted into the wood board 11 and the wood board 12 in the thickness direction to fix the wood board 11 and the wood board 12 .

5D, the laminate of FIG. 5C is turned upside down, the adhesive 40 is filled in the groove 12b, and the reinforcing material 30 is inserted. A groove 13a is formed along the longitudinal direction on the surface of the wooden board 13 (the surface facing the wooden board 12). The groove 13a is filled with an adhesive 40, and the laminate of the wooden boards 11 and 12 is covered with the wooden board 13 before the adhesive 40 hardens. As a result, the wooden board 12 and the wooden board 13 are laminated, and the reinforcing member 30 is surrounded by the grooves 12b and 13a (arranged inside the grooves 13a and 12b).

Then, as shown in FIG. 5E, the binding material 20 is penetrated into the wooden board material 13 and the wooden board material 12 in the thickness direction, and the wooden board material 13 and the wooden board material 12 are fixed.

In this second embodiment (FIG. 4), the reinforcing member 30 is arranged inside the wooden beam member 10 as compared with the first embodiment (FIG. 1B). Therefore, it becomes advantageous with respect to fire resistance.

=== Third Embodiment ===
6A is a side view of the wooden beam member 10 of the third embodiment, FIG. 6B is a sectional view along line AA of FIG. 6A, and FIG. 6C is a sectional view along line BB of FIG. 6A.

A reinforcing member 30' is used in the wooden beam member 10 of the third embodiment. Fixing portions 31 having a larger diameter than other portions are provided at both ends of the reinforcing member 30' in the length direction.

At the contact surface between the wooden board 11 and the wooden board 12, a groove 11a' is formed on the surface of the wooden board 11 in the longitudinal direction, and a groove 12a' is formed on the surface of the wooden board 12 in the lengthwise direction. formed along the The grooves 11a' and 12' have the same size and shape as the grooves 11a and 12b of the second embodiment, except for the ends in the length direction. It is formed larger than the central portion (having a size corresponding to the fixing portion 31 of the reinforcing member 30'). By arranging the groove portion 11a' and the groove portion 12a' to face each other, a fixing groove portion 111 larger than the central portion is formed at the ends in the length direction. The fixing portion 31 of the reinforcing member 30 ′ is arranged in the fixing groove portion 111 .

In the third embodiment, the adhesive 40 is filled only between the fixing portion 31 and the fixing groove portion 111, and the adhesive 40 is not filled in other portions. As a result, the amount of adhesive 40 used can be reduced, and the cost can be further reduced.

The structure between the wooden board 12 and the wooden board 13 is the same, so the explanation is omitted.

===Other Embodiments===
The above-described embodiments are intended to facilitate understanding of the present invention, and are not intended to limit and interpret the present invention. The present invention can be modified and improved without departing from its spirit, and it goes without saying that the present invention includes equivalents thereof. In particular, even the embodiments described below are included in the invention.

In the above-described embodiment, the wooden beam member 10 is composed of three plate members (the wooden plate members 11, 12, and 13), but the number of plate members is not limited to this, and may be plural. For example, it may be two, or four or more.

Further, in the above-described embodiment, the reinforcing member 30 is made of glass fiber, but it is not limited to the glass fiber as long as it has a higher strength than the wood-based material. For example, it may be carbon fiber rods or steel rods.

Further, in the above-described embodiment, each groove (such as the groove 11A) is formed in the wooden beam member 10 in a sealed manner. or a filling hole for filling each groove with the adhesive 40 from the outside.

Further, in the above-described embodiments, the grooves (grooves 11A, 13A, etc.) are formed to have rectangular cross sections (square grooves), but the present invention is not limited to this. For example, it may be a round groove.

Further, in the above-described embodiment, the reinforcing member 30 is provided only below the wooden beam member 10 in the vertical direction, but the present invention is not limited to this. For example, reinforcing material 30 may be added above the central position. This makes it possible to further improve the rigidity and strength.

10 wooden beam member 11 wooden board 11A groove 11a groove 12 wooden board 12a groove 12b groove 13 wooden board 13A groove 13a groove 20 binding material 30 reinforcing material 31 fixing part 40 adhesive 111 groove for fixing

Claims (9)

a first wooden board;
a second wooden board laminated in the thickness direction of the first wooden board;
structural screws or drift pins penetrating the first wooden board and the second wooden board in the thickness direction to fix the first wooden board and the second wooden board;
wherein the wooden beam member is arranged such that the contact surface between the first wooden board and the second wooden board is parallel to the vertical direction,
At least one of the surface of the first wooden board member and the surface of the second wooden board member forming the contact surface is provided with a groove along the length direction orthogonal to the vertical direction and the thickness direction. ,
A reinforcing material is arranged in the groove,
A wooden beam member characterized by: The wooden beam member according to claim 1,
The reinforcing material is a member made of glass fiber,
A wooden beam member characterized by: The wooden beam member according to claim 1 or claim 2,
The groove is provided below the central position in the vertical direction of the wooden beam member,
A wooden beam member characterized by: The wooden beam member according to any one of claims 1 to 3,
The grooves are not provided at both ends of the wooden beam member in the length direction,
A wooden beam member characterized by: The wooden beam member according to any one of claims 1 to 4,
An adhesive is filled between the groove and the reinforcing material,
A wooden beam member characterized by: The wooden beam member according to any one of claims 1 to 4,
The reinforcing member has a fixing portion having a larger diameter than other portions at the ends in the length direction,
the groove portion has a fixing groove portion having a size corresponding to the fixing portion at an end portion in the length direction;
an adhesive is filled between the fixing portion and the fixing groove;
A wooden beam member characterized by: The wooden beam member according to any one of claims 1 to 6,
The first wooden board and the second wooden board are laminated without using an adhesive except in the groove,
A wooden beam member characterized by: a first wooden board and a second wooden board stacked in a thickness direction of the first wooden board,
A method for manufacturing a wooden beam member in which a contact surface between the first wooden board and the second wooden board is arranged in parallel with a vertical direction,
a step of forming a groove along a length direction perpendicular to the vertical direction and the thickness direction in the surface of the first wooden board constituting the contact surface;
filling the groove with an adhesive and arranging a reinforcing material;
a step of superimposing the second wooden board on the surface side of the first wooden board before the adhesive is cured;
a step of inserting structural screws or drift pins into the first wooden board and the second wooden board in the thickness direction to fix the first wooden board and the second wooden board;
A method for manufacturing a wooden beam member, characterized by comprising: a first wooden board and a second wooden board stacked in a thickness direction of the first wooden board,
A method for manufacturing a wooden beam member in which a contact surface between the first wooden board and the second wooden board is arranged in parallel with a vertical direction,
forming a first groove along a length direction orthogonal to the vertical direction and the thickness direction in the surface of the first wooden board constituting the contact surface;
filling the first groove with an adhesive and arranging a reinforcing material;
forming a second groove along the longitudinal direction on the surface of the second wooden board constituting the contact surface so as to correspond to the first groove;
filling the second groove with the adhesive;
Before the adhesive in the first groove and the second groove hardens, the first wooden board and the second wooden board are overlapped so that the reinforcing material is surrounded by the first groove and the second groove. the process of matching,
a step of inserting structural screws or drift pins into the first wooden board and the second wooden board in the thickness direction to fix the first wooden board and the second wooden board;
A method for manufacturing a wooden beam member, characterized by comprising:

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