JP2985001B1 - Joining method of metal reinforced wood - Google Patents

Abstract

Kind Code: A1 Abstract: By combining a metal sheet with light soft wood having low strength, the joining strength with the same or different kind of member is increased without affecting the appearance at all. A metal plate (strip plate) 3 is inserted into and adhered to a groove (saw groove) 2 formed in a longitudinal direction of one or an opposing surface of a timber bar 1 with a metal reinforced wood X. It will be. The metal plate 3 of the metal reinforced wood X and the joining fitting (5) are joined or fixed via the engaging member (6), and the metal reinforced wood X
The metal-reinforced wood X and another member to be joined are connected (joined) together. For example, when the door W is constructed, the hinge 5 is located between the side plate S and the end face of the door W which are close to each other in the closed state.
The wood screws 6 are driven into the metal plates 3 in the side plate core material XS (X) and the door core material XW (X), respectively, and are tightened to the hinges 5, so that the side plate core material XS (X) Door core XW
(X) is connected (joined).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to improving the bending rigidity and strength of light and soft wood of low strength such as cedar, kiri and falkata, which are low-strength light and soft woods, mainly by strengthening metal composites. The present invention relates to a method for joining metal-reinforced wood that can be expanded to applications (utilization) for door frame materials, furniture shelves, and the like by improving the joining strength such as wood screw embedding strength.

[0002]

2. Description of the Related Art In recent years, it has become an international requirement from the viewpoint of forest protection to expand the use of wood that can be planted and grow fast (trees that are planted early) instead of ordinary wood.

[0003] However, early planting trees are generally too vulnerable for use in locations requiring some strength. Therefore, many researches and developments have been made for the purpose of improving the material (mainly strengthening the material).

[0004] There have been published studies on material strengthening by resin impregnation. For example, 496 of Gihodo Publishing Co., Ltd.'s “Handbook of New Wood Materials (1996)”
Page and page 715.

[0005] Patent applications have been filed for development examples of various contrivances relating to wood compaction technology and methods for strengthening thinned wood by combining different materials.

[0006] Some examples are wood consolidation technology, Dainippon Ink and Chemicals, Inc .;
No. 24904, Kozan High-Tech Research Institute Co., Ltd .; JP-A-3-97503; Mitsuhiko Tanahashi; JP-A-3-23180
No. 2, Wakayama Prefecture; JP-A-5-42510; Daiken Kogyo Co., Ltd .; JP-A 5-154809;
JP-A-9-155814 and Gifu Kako Veneer Works; JP-A-9-267309.

[0007] Further, regarding a method of strengthening thinned wood by combining different kinds of materials, there is IBIDEN Co., Ltd .;

[0008]

However, many of these conventional examples require expensive processing equipment or a large amount of processing chemicals, and at the same time, have a good color tone, good humidity control, good feel, and the like. In many cases, the inherent characteristics of wood are impaired.

The present invention has been made in view of such circumstances, and solves these problems, and does not affect the appearance at all, and only requires inexpensive processing inside the wood to produce light and soft wood. It is an object of the present invention to provide a method for joining metal-reinforced wood, which can improve bending rigidity and joining strength and can be used (expanded) in addition.

[0010]

SUMMARY OF THE INVENTION In order to solve the problems, the present invention combines a metal member with light and soft wood having low strength to reduce bending rigidity and joining strength relating to joining with different members. A method of joining metal-reinforced wood so as to augment it, forming a pair of grooves by symmetrically grooved in the longitudinal direction of one or the opposing surface of the wood timber with respect to the center axis of the timber, A metal plate is inserted into each of the grooves and adhered, and the metal plate and a hinge, an angle, or another joint fitting are connected or fixed via an engaging member, so that metal-reinforced wood or metal-reinforced wood and other And a member to be joined.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment of the present invention, in the above-described structure, the groove in the groove processing is a saw groove formed over the entire length of the square member, and the metal plate is dimensioned so that it can be inserted through and inserted into each groove. It is a strip plate. The connection via the engagement member is performed by screwing using a wood screw.

[0012] In the long rectangular bar having this configuration, the tensile Young's modulus of the metal plate itself is high even if a bending load in the parallel direction or a bending load in the orthogonal direction is applied to the pair of embedded metal plates. In addition, since the metal plate disperses the compressive stress applied to the wood part between the metal plates and acts to prevent the bending of the metal plates on the opposite sides, a much higher bending strength and bending rigidity than before reinforcement is obtained. Can be. At the same time, a high bonding strength can be obtained by fastening a fixing member such as a wood screw to the embedded metal plate (strip).

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings.

(Example 1) FIG. 1 shows a metal-reinforced wood used in the method of the present invention [hereinafter referred to as "work-related wood". FIG.

As shown in FIG.
Forming a pair of symmetric grooves (2, 2) in the longitudinal direction of one surface of the timber bar (1) with respect to the central axis of the bar (1);
A metal plate (3) is inserted into each of the grooves (2).
Therefore, the wood part and the metal part have a laminated structure in a cross-sectional view. The metal plate (3) may have one pair (two pairs facing each other) inserted from the facing surface of the timber lumber (1). [Example 2 to be described later]

Here, the insertion is, specifically, insertion and adhesion. After an adhesive is injected from the application groove (4) into the groove (2), the metal plate (3) is inserted and fixed. Things.

FIG. 2 shows an example in which the related wood (X) reinforced with a pair of metal plates and the hinge (5) are connected, and the related wood (X; XS, XW) is connected to the door (wing). FIG. 6 is an explanatory cross-sectional view showing a joining method using the panel as a component (core material).

As shown in the figure, when the door (W) is constructed, the wood (X) related to the embodiment is used as a core material of a panel of a type called a flash structure.

Here, the side plate (S) is provided with a wooden timber (1).
The relevant wood (X) in which the metal plate (3, 3) is inserted in parallel with the longitudinal direction in the cross-sectional view of FIG. In the door (W), a metal plate (3, 3) is embedded and adhered in parallel to the short direction in a cross-sectional view of the timber square wood (1), and a practically related wood (X) is attached to the door in the longitudinal direction [ Below, door core material (XW). ]. Prior to embedding the metal plate (3) in the timber lumber (1), an application groove (4) for applying and supplying an adhesive is previously formed with a circular saw.

A hinge (5) is interposed between the side plate (S) and the end surface of the door (W) which are close to each other in the closed state,
The metal plate (3) in the side plate core material (XS) and the metal plate (3) in the door core material (XW) are joined by driving and tightening wood screws (6), respectively. (X)
That is, the side plate core material (XS) and the door core material (XW) are connected. There is no strength problem in this door configuration.

(Embodiment 2) FIG. 3 shows a construction element (for example, by connecting an implementation-related timber reinforced with two pairs of metal plates and an angle, and connecting this implementation-related timber and another member (member to be joined). , A beam and a column.) FIG.

As shown in the figure, the building elements are constructed by using the implementation-related wood (Y) as a beam and another member (member to be joined) (Z) as a pillar.

Here, the implementation-related wood (Y) has a pair of metal plates (31, 32) (33, 34) inserted from opposite short surfaces of the wide timber bar (1). It is configured to be reinforced with two pairs of opposing metal plates.

Then, the execution related wood (Y) and the angle (7) are connected, and the execution related wood (Y) and another member (member to be joined) (Z) are connected. In this case, the separate member (Z) is a single piece of wood having sufficient wood screw pull-out strength. Naturally, this separate part (Z) can be replaced by a working-related wood (for example, as described in Example 1), and combined with the angle (7) in the same manner as described above to obtain a joint between the working-related woods. May be.

Example 3 FIG. 4 shows a timber (X ') related to the practice.
For the plate-like element (P) in which the square bar (1) is integrated,
The implementation-related wood (X ′) and the receiving bracket (8) are combined, and the implementation-related wood (X ′) and another member (joined member) (Z) are connected to form a building element (for example, a floor). It is sectional drawing explanatory drawing which shows a joining method.

As shown in the drawing, the related wood (X ') reinforced with a pair of metal plates and the unreinforced wood square (1)
A plate-like element (P) formed by assembling a plurality of
To another member (Z). In this case as well, the separate member (Z) may be implementation-related wood (X) or may be wood that has sufficient wood screw pull-out strength by itself.

By the way, when the connection (joining) is performed as in each of the above embodiments, the joining strength depends on the pull-out strength with respect to the wood into which the wood screw is driven.

Therefore, the improvement effect on the joining strength of the structure of the present invention will be described below based on experimental facts (measurement results of wood screw pull-out strength).

Strength measurement 1 (Implementation-related wood b) A 0.4 mm thick packing band iron is embedded in a drilled timber, and the reinforcing wood obtained by bonding with an epoxy resin adhesive passes through the reinforcing band iron. Open a guide hole with a 2.3 mm diameter drill, and
2.7mm, 16mm length wood screw embedded, JIS A 5908 5.1
The pull-out strength was measured by a method according to the “wood screw holding force test” specified in “0”.

Strength measurement 2 (Embodiment-related wood) A reinforced wood obtained by embedding a 0.6 mm thick aluminum plate in a squared timber and bonding it with an epoxy resin adhesive has a diameter of 2.0 mm so as to penetrate the reinforced aluminum plate. A guide hole was made with the above drill, and the pull-out strength was measured in the same manner as described above.

Strength Measurement 3 (Comparative Material) A guide hole was drilled in a non-treated square timber with a 2.0 mm diameter drill, and the pull-out strength was measured in the same manner as described above.

Table 1 shows the results of the above measurements. From this, it can be seen that the wood screw joint strength with respect to the implementation-related wood with metal reinforcement is much higher than that of untreated wood (comparative material).

[0033]

[Table 1]

[0034]

According to the present invention, there is provided the above structure,
According to this, a significant improvement in the bonding strength can be achieved. That is, since the joining strength depends on the pull-out strength of wood (metal-reinforced wood) into which the engaging member (wood screw) is driven, the joining strength can be significantly enhanced by engaging with the metal plate.

Further, since the bending rigidity and the joining strength can be improved by the method of the present invention (including the metal-reinforced wood), early planting trees that are inexpensive and have a stable supply can be used as furniture housing members. This is industrially beneficial because it can contribute to the expansion of its use.

In addition, it is expected that the use of wood that is inherently too light and soft in nature, such as afforested trees, can be expanded, thereby contributing to new material design and material development.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing the structure of an implementation-related wood.

FIG. 2 is a cross-sectional explanatory view showing a joining method in which a door is formed by joining an implementation-related timber reinforced with a pair of metal plates and a hinge.

FIG. 3 is an explanatory cross-sectional view showing a joining method in which a construction element is formed by joining an implementation-related wood and an angle reinforced with two pairs of metal plates and an angle.

FIG. 4 is an explanatory cross-sectional view showing a joining method in which a construction element is formed by combining the implementation-related wood and a receiving metal member with a plate-shaped element including the implementation-related wood and assembled with a timber.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 wood timber 2 groove (saw groove) 3 metal plate (strip plate) 4 coating groove 5 hinge (joining bracket) 6 wood screw (engaging member) 7 angle (joining bracket) 8 receiving bracket (joining bracket) S side plate W door P Plate element X Implementation related wood XS Side board core material (implementation related wood) XW Door core material (implementation related wood) X 'Implementation related wood Y Implementation related wood Z Separate member (joined member)

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) E04B 1/48 B27M 3/00 E04C 3/12

Claims (3)

(57) [Claims] 1. A method for joining metal-reinforced wood, wherein a metal member is combined with light soft wood having low strength to enhance the bending rigidity and the joining strength relating to joining with a dissimilar member. In the longitudinal direction of one or opposing surfaces of the timber lumber, grooves are formed symmetrically with respect to the center axis of the lumber to form a pair of grooves, and a metal plate is inserted into each of the grooves and adhered, By joining or fixing the metal plate and hinges, angles and other joining fittings via engaging members,
A method of joining metal-reinforced wood, comprising connecting metal-reinforced wood or metal-reinforced wood to another member to be joined. 2. The metal reinforcement according to claim 1, wherein the groove in the groove processing is a saw groove formed over the entire length of the square bar, and the metal plate is a strip that is dimensioned so that it can be inserted through and inserted into each of the grooves. Wood joining method. 3. The method for joining metal-reinforced wood according to claim 1, wherein the connection via the engaging member is screwing with a wood screw.