JPS6329068Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a reinforcing laminated wood reinforced with reinforcing bars in which narrow iron plates are embedded within the cross section.

[Prior art and its problems]

Conventionally, laminated wood has weak strength properties, so it could not be used as structural materials for buildings or other components that require strength.

In other words, the properties of laminated wood vary depending on the species of wood from which it is sourced, the region of origin, etc., but it is particularly poor in toughness and splitting properties when wet.

[Means for solving problems and their effects]

The present invention has the following configuration in order to make it possible to use the above-mentioned laminated wood for structural members of buildings.

That is, small grooves 3, 3' are formed in the upper and lower surfaces 2, 2' or either of the upper and lower surfaces of the laminated wood, and inward arrow-shaped punching parts 5, 5' are formed in the small grooves 3, 3' at appropriate intervals. A thin-walled, narrow-width steel plate 7, 7' with an outward triangular punched punch 6, 6' is fitted, resulting from the punching of said inward arrow-shaped punch 5, 5' and the arrow-shaped punch 5, 5'. Punching hole 8,
The thin narrow iron plates 7, 7' are fixed in the small grooves 3, 3' by nails 9, 9' driven from the holes 8', and outermost edge retainers are attached to the upper and lower surfaces 2, 2' or either of the upper and lower surfaces of the laminated wood. Member 11,1
1' is fixed.

By adopting the above-mentioned structure, the present invention overcomes the weaknesses of laminated wood and makes it possible to use it as a component of buildings that requires strength.

[Explanation of Examples]

Embodiments in which the reinforced laminated wood reinforced with reinforcing bars of the present invention shown in the drawings are used for beams will be described below with reference to FIGS. 1 to 9.

In the drawing, 1 is the top layer of laminated wood, 1' is also the bottom layer, 2 is the surface of the top layer 1, 2' is the surface of the bottom layer 1', and 3, 3' are recessed surfaces 2, 2'. The small grooves 4, 4' that accommodate the thin narrow iron plates 7, 7' are the inner surfaces of the small grooves 3, 3';
7' is an inward arrow-shaped puncture part, 6, 6' is an outward triangular puncture part, 7, 7' is a thin narrow iron plate that is accommodated and fixed in the small grooves 3, 3', and 8, 8' are puncture parts. 5,
The punched holes 9, 9' that are created as a result of punching out the holes 5' are punched from the triangular parts of the punched holes 8, 8',
Nails fixing 7' to the top layer 1 and the bottom layer 1', 10
is the neutral axis of the laminated wood beam, and 11 and 11' are the upper and lower outermost edge pressing members of the uppermost layer 1 and the lowermost layer 1' of laminated wood, which may be laminated wood, but thin wood is preferable. 1
2 is a fire retardant paint or fire retardant for surface coating.

[Structure and operation of the present invention]

Next, the manufacturing process and operation of the reinforced laminated wood reinforced with reinforcing steel according to the present invention will be explained with reference to FIGS. 1 to 9.

First, the wood materials are polymerized and bonded to form laminated wood. Small grooves 3, 3' are formed in the surfaces 2, 2' of the uppermost layer 1 and the lowermost layer 1'.

Adhesive is applied to the inner surfaces 4, 4' of the small grooves 3, 3', and a thin narrow iron plate 7 is driven into the small grooves 3.

Arrow-shaped puncture parts 5,
5' and the outward triangular punctures 6, 6', the punched holes 8, 8', 6a, 6a' are formed.

The thin-walled, narrow-width iron plates 7, 7' are pre-applied with tensile stress and are placed in the small grooves 3, 3', so that the inward arrow-shaped puncture parts 5, 5' dig into the top layer 1 and the bottom layer 1'. .

Next, nails 9, 9' are driven into the three corners of the punched holes 8, 8' in the narrow iron plates 7, 7'. The diameter of the nail heads of the nails 9, 9' is set larger than the width of the tapered part of the triangular part of the board holes 8, 8'.
The nail heads press and fix the iron plates 7 and 7'. The nails 9, 9' are driven over the neutral axis 10 of the laminated wood from above and below, and their tips intersect with each other.

Thus, the top layer, the bottom layer 1, 1', the nail 9,
The nail head 9' and the outer surface of the iron plate 7 are on the same level.

Finally, the outermost edge pressing members 11, 11' are pressed and bonded to the outside of the upper and lower layers 1, 1', and are fixed by biting into the outward triangular punched puncture parts 6, 6'. If necessary, apply a surface coating such as fire prevention paint 12. In this way, the laminated wood according to the present invention is completed.

In addition, FIGS. 7 and 8 show thin-walled, narrow-width iron plates 7,
7' is inserted in two rows, and FIG. 9 shows a case in which five rows are inserted.

[Effects of this invention]

Since the present invention has the above-mentioned configuration, its effects are summarized as follows.

Since the thin and narrow iron plates 7 and 7' are inserted, tensile stress, compressive stress, and bending stress are dramatically increased compared to conventional laminated wood. Therefore, laminated wood with strong structural strength can be obtained without particularly increasing costs. Therefore, the reinforced laminated wood reinforced with reinforcing steel according to the present invention can also be used as a structural material for buildings.

Although it is not necessary to apply tensile stress to the narrow iron plates 7, 7', applying tensile stress produces the following effects. In other words, when the narrow iron plates 7, 7' are driven into laminated wood with tensile stress applied in advance, compressive stress acts on the wood, and the tensile stress that occurs when the wood stretches due to moisture, rainwater, etc. It is counteracted by the compressive stress and acts as a force that resists this elongation.

Furthermore, the compressive stress applied to the wood acts as a force to resist the tensile stress that occurs when the wood dries and tends to warp and curve. The relationship is similar to the relationship between prestressed concrete's PC steel rod and concrete.

As a result, the laminated wood reinforced with reinforcing laminated wood can be prevented from expanding and contracting and can maintain the necessary strength.

The thin narrow narrow iron plates 7, 7' are the upper and lower holding members 11,
11' and is buried, so it is not directly exposed to the air and does not rust.

Since the laminated wood of the present invention is reinforced with thin narrow iron plates 7 and 7', even laminated wood made of low-grade wood can be used.

[Brief explanation of the drawing]

Figure 1: Cross-sectional view of 7-layer laminated wood, Figure 2:
A sectional view in the span direction of the same as above, Fig. 3: An enlarged view of the main part of Fig. 2, Fig. 3a: A perspective view of the thin narrow steel plates 7, 7',
Figure 4: Plan view of thin narrow steel plates 7, 7', Figure 5: Upper cross-sectional view of the same laminated wood beam as above, Figure 5:
Similarly, the lower cross-sectional view, Figure 6: Planar arrangement of the thin narrow narrow iron plates 7 of the same laminated wood beam as above, Figure 7: Cross-sectional view of the laminated timber of the present invention, nails 9, 9' driven in two rows. Indicates the time. Figure 8: Plan view of Figure 7, Figure 9
Figure: Plan view when thin-walled, narrow-width iron plates 7 are arranged in five rows. 1, 1': Top and bottom layers of laminated wood, 2,
2': Surface of top layer 1, bottom layer 1', 3, 3': Small groove, 4, 4': Inner surface of small groove 3, 3', 5, 5':
Inward arrow-shaped puncture part, 6, 6': outward triangular puncture part,
6a, 6a': punched holes, 7, 7': thin narrow narrow iron plate,
8, 8': punched holes for arrow-shaped puncture parts 5, 5', 9,
9': Nail, 10: Neutral axis, 11, 11': Upper and lower outermost edge pressing members, 12: Surface coating.

Claims (1)

[Scope of claim for utility model registration] Small grooves 3, 3' are recessed on the upper and lower surfaces 2, 2' or either of the upper and lower surfaces of the laminated wood, and inward arrow-shaped punchings are formed in the small grooves 3, 3' at appropriate intervals. Thin narrow steel plates 7, 7' having puncture parts 5, 5' and outward triangular punched puncture parts 6, 6' are inserted, and the inward arrow-shaped puncture parts 5, 5' and the arrow-shaped puncture parts 5, 5 are fitted. The punched hole 8 resulting from the punching of '
The thin narrow iron plates 7, 7' are fixed in the small grooves 3, 3' by nails 9, 9' driven from the holes 8', and the outermost edges are fixed on the upper and lower surfaces 2, 2' or either of the upper and lower surfaces of the laminated wood. Pressing member 1
1 and 11' are fixed by biting of the outward triangular punched puncture parts 6 and 6'. The reinforcing laminated wood reinforced with reinforcing bars according to claim 1, wherein the thin narrow narrow iron plates 7, 7' are fixed in the small grooves 3, 3' under tensile stress.