JPH11129220A - Laminated lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated lumber, which has a strength enough to overcome a tensile stress and an extremely high reliability. SOLUTION: Connected lumbers 2, 3 and 4, each of which is produced by connecting a plurality of rectangular lumbers in their longitudinal direction, are laminatedly bonded in the direction of the thickness of the connected lumbers 2, 3 and 4 so as to form a laminated lumber 1. A joint part 19 in the longitudinal direction of one and the other rectangular lumbers 9 and 10, which connect with each other and at least compose the connected lumber 4 locating at the lowermost stage of the laminated lumber is equipped with one joint worked part 17 having one come-off preventive engaging surface 17d projecting from one end of one rectangular lumber 9 and the other joint worked part 18, which is formed at the other end of the other rectangular lumber connecting in the longitudinal direction of the one rectangular lumber 9 and has the other engaging surface 18d engaging with the one engaging surface 17d. In this case, the one joint worked part 17 is fitted to the other joint worked part 18 so as to engage the one engaging surface 17d with the other engaging surface 18d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillar constituting a structure,
The present invention relates to a laminated wood used for a load-bearing member such as a girder or a beam.

[0002]

2. Description of the Related Art In general, solid wood is used for columns, girders or beams constituting a wooden structure, but solid wood is expensive and waste materials are effectively used. From the point that it is required to perform the above, there are many cases where glued laminated lumber has been used for the columns, girders and the like. This glued laminated lumber is formed by gluing and bonding a plurality of rectangular lumbers or sawn boards with their fiber directions substantially parallel to each other in the thickness and length directions. In the case of manufacturing a material, it is a fact that it is manufactured by vertically joining square members or sawn boards and laminating and bonding them.

[0003] Therefore, this conventional laminated wood 100 is shown in FIG.
As shown in FIG. 3, a plurality of square members 101 are joined in a length direction at a joint portion 102 to form a connecting member 103.
3 are laminated and adhered in the thickness direction, for example, in three stages. The glued lumber 100 is joined to the joint portion 102 by a so-called bad joint in which the end surface of one of the square members 101 and the end surface of the other square member 101 are simply joined with an adhesive. In addition, in addition to the above-mentioned bad joint, there is a conventional method called a finger joint shown in FIG. 6 or a scarf joint shown in FIG. That is, FIG.
In the connection member 200 by the finger joint shown in FIG. 1, a plurality of peaks and valleys (the symbols are omitted) having a sharp tip at one end of one of the sawing plates 201 are alternately formed, and the other sawing plate 202 is formed. At the other end of the valley, valleys corresponding to the valleys formed on the above-mentioned one milling plate 201 and valleys (reference numerals are omitted) corresponding to the valleys are alternately formed. A joint portion 203 in which peak portions formed on the plates 201 and 202 are fitted into and bonded to valley portions.
Are joined together. Further, the connecting member 300 by the scarf joint shown in FIG. 7 includes one inclined surface formed at one end of one sawing plate 301 and the other inclined surface formed at the other end of the other sawing plate 302. It is bonded and joined at the joint 303. Each of these finger joints and scarf joints has a processed shape assuming adhesion, and aims at increasing the bonding area of the joint portion and improving the durability.

[0004]

However, in the above-mentioned conventional glued laminated lumber, poor bonding at the joints 102, 203, and 303 may occur due to insufficient control of wood, an adhesive, or a work process. First, when an adhesion failure occurs, it becomes a serious problem. For example, if the above-described joints 102, 203, and 303 have poor adhesion with respect to the tensile stress of the lower chord material, which is important when used as a joint beam, sufficient strength cannot be obtained.

Therefore, the present invention has been proposed to solve the above-mentioned problems of the conventional laminated wood, and has a strength which can sufficiently cope with a tensile stress and which is extremely reliable. It is intended to provide materials.

[0006]

Means for Solving the Problems The present invention has been proposed to achieve the above-mentioned object, and the first invention (the invention described in claim 1) is that a plurality of square members are formed by using a plurality of square members. A connecting member connected in the length direction, a laminated member formed by gluing and bonding in the thickness direction of the connecting member, and one and the other forming a connecting member located at least at the lowest level and being connected to each other The joint portion in the length direction of the square bar is one joint processed portion that protrudes from one end of the one square bar and has one engagement surface for preventing pull-out, and the length of the one square bar The other joint processing portion formed on the other end of the other square member connected in the direction and having the other engagement surface engaged with the one engagement surface, the one joint processing portion The other joint processing portion is fitted, and the one engagement surface is engaged with the other engagement surface. And it is characterized in and.

According to the laminated material according to the first aspect of the invention, the one engaging surface is engaged with the other engaging surface to prevent pull-out, so that the laminated material curves downward, Even when a force is applied in a direction in which the square members constituting the lowermost connecting member are separated from each other, there is no fear that the square members are separated from each other, and the durability of the laminated timber can be increased.

The second invention (the invention according to claim 2)
Is a laminated material in which a plurality of rectangular materials are connected in the length direction of the rectangular materials, and the laminated material is laminated and bonded in the thickness direction of the coupling material, and is located at least at the lowermost stage and the uppermost stage. The one and the other joints in the longitudinal direction of the one and the other square members, which constitute the connecting member and are connected to each other, protrude from one end of the one square member and have one engagement surface for preventing pull-out. The other jointed portion formed on the other end of the other squared member connected in the longitudinal direction of the one squared member and the other engagement surface engaged with the one engagement surface. Wherein the one joint processing part is fitted to the other joint processing part, and the one engagement surface is engaged with the other engagement surface. .

According to the laminated wood according to the second aspect of the present invention, the joints of the connecting members located at the uppermost stage and the lowermost stage are also subjected to joint processing for preventing pull-out. Even if it is inverted, there is no fear that the timbers will be dissociated in the same manner, and it is possible to make the timber more convenient.

The third invention (the invention according to claim 3)
Is characterized in that, in the first or second invention, an adhesive is applied to the one joint processing part and the other joint processing part.

According to the glued laminated wood according to the third aspect of the present invention, a sufficient bonding area by the adhesive can be ensured, so that it is possible to reduce the tensile stress applied to the glued laminated wood together with the structure of the joint. Even higher strength can be secured.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a laminated wood according to each embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the laminated wood 1 according to the first embodiment has a first connecting member 2 and a second connecting member 3 which are laminated and bonded with their fiber directions substantially parallel to each other. And a third connecting member 4.

The first connecting member 2 is formed by connecting a large number of square members in the longitudinal direction of the square members.
In FIG. 1 which shows a part of the structure, a first square member 5 and a second square member 6 are connected in the length direction via a first joint 13. Similarly, in the second connecting member 3, the third square member 7 and the fourth square member 8 are connected to the second joint 1
6 in the longitudinal direction, and
In the connection member 4 of the fifth embodiment, the fifth square member 9 and the sixth square member 1
0 is connected in the length direction via the third joint 19. The first bar 5, the third bar 7 and the fifth bar 9 are one of the bars constituting the present invention, and the second bar 6 and the fourth bar 8 are respectively included in the present invention.
And the sixth square member 10 are the other square members. And
In the present embodiment, the third joint 19 is located below the first joint 13 and the second joint 16
Are formed at positions slightly separated from the first and third joint portions 13 and 19.

A first joint processing portion 11 is formed at one end of the first square member 5 as shown by a dotted line in FIG. 1, and the other end of the second square member 6 is formed at the other end thereof. 2nd joint processing part 1 processed into the shape corresponding to 1 joint processing part 11
2 are formed. Further, a third joint processing portion 14 is formed at one end of the third square member 7, and a third joint processing portion 14 is formed at the other end of the fourth square member 8 into a shape corresponding to the third joint processing portion 14. The formed fourth joint processing portion 15 is formed. Similarly, a fifth joint processing portion 17 is formed at one end of the fifth square member 9, and has a shape corresponding to the fifth joint processing portion 17 at the other end of the sixth square member 10. A processed sixth joint processing portion 18 is formed.

As shown in FIG. 2, the fifth joint processing section 17 (the same applies to the first joint processing section 11 and the third joint processing section 14) is formed into a substantially barbed overall shape. A stepped portion 17a projecting slightly from the end face of the fifth square member 9 to the tip end side and having a lower surface flush with the lower surface of the fifth square member 9, and a stepped portion 17a of the stepped portion 17a. A central shaft 67b projecting from the distal end surface, the lower surface of which is flush with the lower surface of the fifth square member 9, and a base formed at the distal end of the central shaft 17b and having a base end wider than the central shaft 17b and extending toward the distal end. The head 17c, which is gradually narrowed and has a lower surface flush with the lower surface of the fifth square bar 9, is formed. Note that the distal end surface of the head portion 17c is a vertical surface, and the proximal end surface continuous with the distal end of the central shaft portion 17b is
One engaging surface 17d constituting the present invention is provided.

On the other hand, the sixth joint processing section 18 (the same applies to the second joint processing section 12 and the fourth joint processing section 15).
As shown in FIG. 2, is formed at the other end of the sixth square bar 10, and its overall shape is formed in a substantially barbed shape corresponding to the shape of the fifth joint processing portion 17. And a recess formed in the direction from the bottom surface to the upper surface of the sixth square bar 10. That is, the sixth joint processing portion 18 has a first fitting concave portion 18a in which the step portion 17a is fitted and a second fitting concave portion 18a in which the center shaft portion 17b is fitted.
The fitting recess 18b and the third portion in which the head 17c is fitted.
And the fitting concave portion 18c. It should be noted that the wall surface forming the third fitting concave portion 18c and the wall surface facing the one engagement surface 17d is the other engagement surface 18d constituting the present invention. That is, the glued laminated lumber 1 in this embodiment is composed of the first rectangular beam 5, the second rectangular
Each of the square bars 7 and the fourth square bars 8 and the fifth square bars 9 and the sixth square bars 10 are connected by a joint method called a so-called sick-joint.

As described above, the laminated material 1 is formed by laminating and bonding the first to third connecting members 2, 3, and 4 in the thickness direction of the individual square members (the reference numerals are omitted). And is fixed by connecting bolts 20 and 21 at a plurality of locations. These connecting bolts 20, 21 are
It is inserted through an insertion hole 1a formed in the thickness direction of the laminated wood 1, and the tip side is screwed to a nut (not shown) and tightened to further improve the strength.

Hereinafter, a brief description will be given of a method of manufacturing the above-described laminated wood 1. In this laminated wood 1, first, a large number of square members including the first to sixth square members 5 to 10 described above are prepared, and joint processing portions (reference numerals are omitted) are formed on the respective members, and the joint processing is performed. It is connected in the longitudinal direction of the square bar through the portion. In this case, an adhesive (not shown) is provided on the inside of the second, fourth, and sixth joint processing parts 12, 14, 16 or on the surface of the first, third, and fifth joint processing parts 11, 13, 15. Is applied in advance. Through these steps, the first to third connecting members 2, 3, and 4 are formed, and then the lower surface of the first connecting member 2 and the lower surface of the second connecting member 3, or the second connecting member An adhesive (not shown) is applied to both the upper and lower surfaces of 3 or the upper surfaces of the second connecting material 3 and the third connecting material 4, and is slightly compressed by a press or the like (not shown) to cure the adhesive. Be completed. In addition, each laminated wood 2,3
When fixing the fixing bolt 4, the insertion holes 1 a through which the bolts 20 and 21 are inserted by a drill or the like without using an adhesive.
And the laminated timber 1 is fastened in the thickness direction by the bolts 20 and 21, washers 22 and 23, and nuts (not shown),
Or, as described above, each glued laminated timber 2,
After bonding 3 and 4, the bolts 20, 21 and the like may be used for tightening and fixing.

Therefore, the glued laminated lumber 1 according to the above-described structure is provided.
According to this, a force is applied from above the connecting member 1, the third connecting member 4 is bent downward, and a force is applied in a direction in which the fifth square member 9 and the sixth square member 10 are separated from each other. The fifth joint processing portion 17 protruding from the end of the fifth square member 9 is fitted to the sixth joint processing portion 18 formed on the sixth square member 10 even when At this time, one engagement surface 17 formed on the fifth square member 9 is provided.
d engages with the other engagement surface 18d, thereby preventing pull-out. The fifth square member 9 and the sixth square member 1 are prevented from being pulled out.
It is possible to effectively prevent the dissociation from zero. In particular, in this laminated wood 1, not only the third connecting member 4 located at the lowermost stage, but also the first connecting member 2 located at the uppermost stage and the second connecting member 3 located at the middle stage are all described above. Since they are connected via joints (reference numerals are omitted), the strength is extremely high, and the durability is extremely high as compared with the finger joint shown in FIG. 6 and the scarf joint shown in FIG. Can be. Further, since the same strength can be obtained even if the laminated wood 1 is turned upside down, it can be made extremely versatile.

The glued laminated lumber 1 is a sickle-joint at all three places in the first to third joints 13, 16, and 19. The laminated lumber according to the present invention is a laminated lumber. It is not necessary for all joints to be perforated sickle joints as in 1. For example, only the lowermost connecting member is connected by perched sacrifice, and the connecting member at the middle portion is a finger joint or a scarf joint which is a conventional method. Alternatively, they may be joined by a bad joint.

The laminated wood 1 is made of the first to third materials.
Are connected and laminated. When the first to third connecting members 2, 3, and 4 are stacked, the connecting members 2, 3, and 4 are As shown in FIG. 3, they may be laminated and joined in a state rotated by 90 degrees from the state shown in FIG. 2, or may be laminated in a state rotated by 180 degrees from the state shown in FIG. Further, the connecting member 2 may be stacked in a state shown in FIG. 2 and the connecting member 3 may be stacked in a state shown in FIG.

Next, the glued laminated lumber 30 according to the second embodiment will be described.
Will be described. The glued lumber 30 is formed by connecting individual squared members, which will be described later, forming the first to third connecting members 31, 32, and 33 by a so-called dovetail joint method. That is, in FIG. 4 showing a part of the laminated wood 30,
The first connecting member 31 is formed by connecting a first square member 34 and a second square member 35 in a length direction with a first joint portion 42, and the second connecting member 32 is formed of a third joint member 32. The square member 36 and the fourth square member 37 are connected in the length direction by the second joint portion 45, and the third connecting member 33 is formed by connecting the fifth square member 38 and the sixth square member 39 to the third member. It is connected in the length direction by a joint 48. The first joint portion 42 is located above the third joint portion 48, and the second joint portion 45 is slightly separated from the first and third joint portions 48 and 42. I have.

Then, at one end of the first square member 34,
A first joint processing portion 40 is formed, and the second square member 35 is formed.
A second joint processing portion 41 formed into a shape corresponding to the first joint processing portion 40 is formed at the other end of the second joint processing portion 41.
Similarly, a third joint processing portion 43 is formed at one end of the third square member 36, and a third joint portion 43 is formed at the other end of the fourth square member 37.
A fourth joint processing portion 44 formed into a shape corresponding to the third joint processing portion 43 is formed, and the fifth square member 38 is formed.
A fifth joint processing portion 46 is formed on one end of the sixth joint member 39. A sixth joint processing portion processed into a shape corresponding to the fifth joint processing portion 46 is formed on the other end of the sixth square bar 39. 47 are formed. The fifth joint processing portion 46 (the same is true for the first and third joint processing portions 40 and 43) is divergent from the base end side to the distal end side, and is formed into a substantially trapezoidal column shape as a whole. , A first engagement surface portion 46b forming the front surface of the fifth joint processing portion 46, a second engagement surface portion 46c forming the back surface, and a bottom surface portion forming the bottom surface 46d and an upper surface portion 4 which forms the upper surface and is flush with the upper surface of the fifth square member 38.
6e.

On the other hand, the sixth joint processing portion 47 is formed as shown in FIG.
As shown in FIG. 5, the vertical joint 4 is formed as a substantially trapezoidal column-shaped recess corresponding to the fifth joint processing section 46.
6a, a first bonding surface portion 47a, a third engagement surface portion 47b that engages with the first engagement surface portion 46b, and a fourth engagement portion that engages with the second engagement surface portion 46c. Surface 47
c and an adhesive surface 47d joined to the bottom surface 46d. The first and second engaging surface portions 46b and 46c formed on the fifth square member 38 are one of the engaging surfaces constituting the present invention, and the first and second engaging surface portions 46b and 46c constitute the present invention. 3 engagement surface portion 47b and fourth engagement surface portion 4
7c is the other engaging surface which constitutes the present invention. In addition,
The method for manufacturing the glued laminated wood 30 according to the second embodiment is not greatly different from the method for manufacturing the first glued laminated wood 1, and therefore the description thereof is omitted.

Even in the case of using the above-described glued laminated material 30, a force is applied from above the connecting material 31 and the third connecting material 33 as in the case of the laminated wood 1 according to the first embodiment. Is bent downward, and even when a force acts in a direction in which the fifth bar 38 and the sixth bar 39 are separated from each other, a fifth joint processing projecting from one end of the fifth bar 38 The part 46 is fitted to the sixth joint processing part 47 formed on the sixth square member 39, and the first engagement surface 46b constituting the fifth joint processing part 46 is The second engagement surface 4 engages with the third engagement surface 47b and constitutes the fifth joint processing portion 46.
Since 6c is engaged with the fourth engagement surface 47c, it is possible to effectively prevent a situation in which the fifth rectangular member 28 and the sixth rectangular member 29 are separated from each other.

[0026]

As is clear from the description of the laminated timber according to each of the embodiments described above, in the laminated timber according to the first invention (the invention according to claim 1), at least the connecting member positioned at the lowest stage One of the joints in the longitudinal direction of the one and the other square members connected to each other and protruding from one end of the one square member and having one engagement surface for preventing pull-out. A processed part, and another joint processed part formed at the other end of the other square member connected in the longitudinal direction of the one square member and having the other engagement surface engaged with the one engagement surface. Since the one joint processing portion is fitted to the other joint processing portion, and the one engagement surface is engaged with the other engagement surface, the laminated material curves downward. And even if force is applied in the direction in which the squares that make up the lowermost connecting member are separated from each other, There is no fear of Judges is dissociated, can be made reliable increase the durability of the laminated wood.

Further, the second invention (the invention according to claim 2)
According to the glued laminated lumber according to the above, the joints of the connecting members located at the uppermost stage and the lowermost stage are also subjected to joint processing for preventing the pull-out, so that even if this glued laminated wood is turned upside down, the square lumbers are similarly formed. There is no need to worry about dissociation, and it can be more convenient.

According to the laminated wood according to the third invention (the invention according to claim 3), the bonding area of the joint can be sufficiently secured, so that the joint can be more securely joined. Thus, extremely high strength against tensile stress can be secured.

[Brief description of the drawings]

FIG. 1 is a front view showing a part of a laminated wood according to a first embodiment.

FIG. 2 is an exploded perspective view showing a part of the laminated wood according to the first embodiment.

FIG. 3 is an exploded perspective view showing a part of a different laminating method of the laminated wood according to the first embodiment.

FIG. 4 is an exploded perspective view showing a part of a glued laminated lumber according to a second embodiment.

FIG. 5 is a perspective view showing a part of the conventional laminated wood.

FIG. 6 is a perspective view showing a conventional method of joining wood.

FIG. 7 is a perspective view showing a conventional method of joining wood.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Glued lumber 5 1st square bar 6 2nd square bar 7 3rd square bar 8 4th square bar 9 5th square bar 10 6th square bar 11 1st joint processing part 12 2nd joint processing part 14 3rd Joint processing part 15 Fourth joint processing part 17 Fifth joint processing part 17f One engaging surface 18 Sixth joint processing part 18e The other engaging surface 30 Glued lumber 34 First square bar 35 Second square bar 36 3rd square bar 37 4th square bar 38 5th square bar 39 6th square bar 40 1st joint processing part 41 2nd joint processing part 43 3rd joint processing part 44 4th joint processing part 46th 5 joint processing part 46b first engagement surface 46c second engagement surface 47 sixth joint processing part 47b third engagement surface 47c fourth engagement surface

Claims (3)

[Claims] 1. A connecting member formed by connecting a plurality of square members in the longitudinal direction of the square member, and is a laminated member formed by gluing and bonding in the thickness direction of the connecting member. One and the other joints in the longitudinal direction of the one and the other square members, which are formed and connected to each other, protrude from one end of the one square member and have one engagement surface for preventing pull-out. The other joint processing portion having a joint processing portion and the other engagement surface formed at the other end of the other square member connected in the longitudinal direction of the one square member and engaging with the one engagement surface. Wherein the one joint processing portion is fitted to the other joint processing portion, and the one engagement surface is engaged with the other engagement surface. 2. A laminated material in which a plurality of square members are connected in the length direction of the square members, and the bonded members are laminated and bonded in the thickness direction of the connected members. The joints in the longitudinal direction of the one and the other square members, which are connected to each other and constitute the connecting member, have one engaging surface for protruding from one end of the one square member and preventing pull-out. The other has a joint processing portion and the other engaging surface formed at the other end of the other square member connected in the longitudinal direction of the one square member and engaged with the one engaging surface. Wherein the one joint processing part is fitted to the other joint processing part, and the one engagement surface is engaged with the other engagement surface. Glulam. 3. The laminated wood according to claim 1, wherein an adhesive is applied to said one joint processing part and the other joint processing part.