JP2000006113A - Back boundary processed wood and its preparation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a back boundary processed wood and a method for preparing it wherein looking such as appearance of a wood when it is completed is prevented from becoming worse caused by a back boundary channel formed on the wood and it can be easily applied to a framework construction method using a fitment and it can be given that cracking caused by back boundary processing is prevented from occurring. SOLUTION: After a back boundary channel 2 is formed on a wood main body 1 being a lumbering green wood, this is artificially dried. The back boundary channel 2 is a little deformed by this artificial drying in such a way that it is a little opened to the outside. In addition, as adjustment for back boundary, it is regularly cut into a wedge-shaped (a tapered or a V-shaped crosssection) regular channel 3. A wood plug 8 with the same wedge crosssection as that of this regular channel 3 is press-fitted into this regular channel 3 through an adhesive 9 and is integrated by embedding. In addition, it is finished by cutting finally the outer face into a required crosssectional shape to obtain a back boundary processed wood 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to timber for construction and, more particularly, to a technique of dividing a pillar or the like.

[0002]

2. Description of the Related Art Conventionally, for example, in the case of pillar materials and the like, wood is easily twisted or cracked due to drying or the like. However, when the spine split appears in a view of the pillar in the completed state, there is a disadvantage that the appearance is poor. In recent frame construction methods, instead of fitting a tenon and a mortise hole, a bracket method using a metal fitting that inserts a plate-shaped metal fitting into a groove is being adopted because of its high bonding strength. . However, if there is a back split with a pillar or the like, it is difficult to form a groove for inserting a bracket, and in some cases, it may not be possible.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a back-split wood and a method of manufacturing the same, which prevent twisting and cracking of the wood due to drying, do not impair the appearance, and can be used even with a framing method using metal fittings. To provide.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a timber that has been subjected to spine splitting, and has a spine split groove extending in a longitudinal direction at a predetermined portion of the lumber such as a pillar, a beam or a girder. It is characterized in that it is formed with a depth to form a fixed groove, and a padding is embedded and integrated so as to be in close contact with the fixed groove.

Here, the groove for the back split is formed in a wedge-shaped (also referred to as a tapered) cross-section to form a fixed groove, and a padding having a wedge-shaped cross-section is also embedded in the fixed groove so as to be in close contact therewith. Good. In this way, the groove with a wedge-shaped cross section
By embedding a padding with a wedge-shaped cross section,
The adhesion between the wall surface of the groove and the buried tree is improved, and their unity is improved. However, the fixed groove is not limited to the wedge shape, and may have a rectangular cross section having a uniform width, and a rectangular padding may be inserted therein.

[0006] The method of manufacturing such a split-split wood is to form a slot in a predetermined direction of the wood such as a pillar, a beam, a girder, etc., to extend the slot in the lengthwise direction, then dry the split-split wood, and further split the spine. The groove is cut to form a fixed groove, a buried tree corresponding to the groove cross section is buried and fixed in the fixed groove, and then the outer surface of the wood is modified to a predetermined size including the buried tree. It is characterized in that it is made of wood that has been split.

[0007] Again, a wedge-shaped padding can be used. When the back split wood is dried, the wood tends to be deformed so that the opening is widened by the drying. Therefore, by cutting the widened groove of the spine so as to have a wedge-shaped (tapered) cross section, the cutting allowance can be reduced.
A padding with a wedge-shaped cross section is embedded in the wedge-shaped groove. At that time, a fixing means such as an adhesive is interposed between the two to integrate them. At the time of embedding of the buried tree, the buried tree is pressed into the groove of the wedge-shaped cross section, and the tapered outer surface of the buried tree and the tapered inner surface of the groove are bonded with a predetermined surface pressure by the wedge action. Adhering through agents and the like, the bonding property is increased as if it were solid wood.

[0008] However, the standard groove formed in the wood is not necessarily a wedge-shaped (tapered) cross-section, but is a groove having a rectangular cross-section having normal parallel wall surfaces. As described above, a rectangular cross section having a side surface may be used.

[0009]

Embodiments of the present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 shows an example of a manufacturing process of a split-split wood as an example of the present invention. In this method, the present invention is applied to wood such as a girder or a beam. First, when raw wood is sawn, a back split groove 2 is formed as in the conventional case. The height of the wood 1 (hereinafter referred to as wood body) is, for example, about 30 to 40 cm, and the width is about 10 to 15 cm. If used on wood without splitting, cracks generally occur with drying.

Next, drying is performed artificially. For example, the wood main body 1 is kept in a heating atmosphere for a predetermined time. Here, the wood main body 1 can be put in a drying furnace in which hot air such as a heater is circulated (for example, ventilated) for a certain period of time. In any case, the water content of the wood body 1 is reduced to, for example, 10 to 30%, preferably about 10 to 15%. Due to such artificial drying, the back split groove 2 tends to be deformed (distorted) so as to widen the opening, as shown in an exaggerated manner in the figure. Such deformation due to artificial drying is advantageous for making a predetermined cut of a wedge-shaped cross section to be prepared later. That is, by using such a V-shaped deformation, the cutting allowance can be reduced.

In the step of correcting the spine split, the distorted spine split groove 2 is formed into a wedge-shaped cross section (a tapered cross section or a V-shaped cross section; the same applies hereinafter) by using, for example, a circular saw or milling cutting tool. Cut to a standard shape. For example, FIG.
As shown in FIG. 1, a saw-shaped cutting tool 5 having a tapered cutting cross section is used, and the wood main body 1 is moved in the longitudinal direction along the back split groove 2 while rotating the cutting tool 5 in a plane parallel to the back split groove 2. Or the cutting tool 5 is moved along its longitudinal direction. In short, the wood main body 1 and the cutting tool 5 are relatively moved in the longitudinal direction of the wood main body 1.

A circular saw-shaped cutting tool 7 as shown in FIG. 4 ((a) is a front view, (b) is a half-side view) can also be used. In this example, in the rotation direction indicated by the arrow, V
Cutting edge 7 for cutting a V-shaped groove (hereinafter also referred to as a V-groove)
a is provided on the front side of each blade 7b. For example, each blade 7b
Are alternately inclined right and left, and as a whole, one wall surface and the other wall surface of the V-groove are alternately cut, or a pair of V-shaped cutting blades 7a are formed on both front edges of each blade portion 7b. Therefore, both wall surfaces of the V-groove are cut (sawed) at the same time. Of course, in addition to processing both walls of the V-groove at once as described above, it is also possible to process each wall of the V-groove one by one with a simple circular saw.

As shown in FIG. 3, a milling cutting tool 6 having a tapered cross section is used, and a large number of blades for forming grooves are formed on the outer periphery thereof. The fixed groove (V-groove) 3 in FIG. 1 can be cut by a technique such as moving the wood body 1 relative to the wood body 1 in the longitudinal direction while rotating the wood body 1. Alternatively, although not shown, a thin planer blade entering the back split groove 2 is moved (for example, reciprocated) along the longitudinal direction of the groove, thereby cutting each of both side groove surfaces of the back split groove 2, or It is also possible to use a plane blade having a tapered cross section for simultaneously processing both groove surfaces.

As shown in FIG. 5, the depth of the standard groove 3 can be stopped short of the lowest portion of the original back split groove 2 in the depth direction. For example, assuming that the difference in the depth is d1, d1 is in a range of, for example, about 1 to 10 mm (particularly, 4 to 6 mm).
), And the bottom of the fixed groove 3 does not have a perfect acute angle, but a groove bottom 3a having a constant width can be formed. For example, if the width of such a flat or concave curved groove bottom surface 3a is w1, then w1 is:
For example, it can be 2 to 10 mm (particularly about 5 to 7 mm). As described above, the formation of the groove bottom 3a having a constant width at the bottom of the fixed groove 3 facilitates cutting, and
It has the meaning of adjusting to the shape of the padding to be inserted later to some extent.

On the other hand, a blank 8 corresponding to the wedge-shaped cross section of the fixed groove 3 is separately prepared and prepared. As shown in FIG. 6, for example, the embedded wood 8 has a plate shape having a wedge-shaped cross section, has a slightly larger dimension than the groove cross section of the fixed groove 3, and is formed by a predetermined press machine through the opening of the fixed groove 3. It is pressed into the groove 3. Here, an appropriate adhesive 9 is applied to both side surfaces of the embedded wood 8 (see FIG. 1), or the adhesive 9 is applied to both groove surfaces of the fixed groove 3. Or buried wood 8 and fixed groove 3
The adhesive 9 can be applied to both of them.

When the embedded wood 8 is inserted into the fixed groove 3 of the wooden body 1, a wedge-shaped piece of wood (8) is inserted into the wedge-shaped space (3). Both sides of the shape are strongly adhered to both tapered groove surfaces of the fixed groove 3 via the adhesive 9 by a wedge effect. The adhesive 9 may be entirely or partially as long as a certain adhesive strength is obtained. In this case, where the adhesive is not interposed, a state in which the wood surfaces are in close contact with each other can naturally occur. In any case, when the adhesive 9 is solidified, the embedded wood 8 and the wood body 1 are solidified.
Means that the fixed groove 3 is substantially filled.

In a state after the embedded tree 8 is fixed, the embedded tree 8
The size can be set so that it slightly protrudes from the opening of the fixed groove 3 of the wood body 1. This is effective in minimizing the cutting amount of the wood body 1 in the finishing work scheduled later. Then, in the final step, the outer surface of the wood body 1 including the back surface (the upper surface in FIG. 1) of the embedded wood 8 is finished to a final rectangular cross section with an electric planer or another cutting tool, and a final spine splitting process is performed. Wood 10 is assumed.
At this time, it is possible to finish and process all four sides of the wood main body 1 (upper, lower, left and right).
Finishing the outer surface including the back surface of the wood body 1 and both side surfaces of the wood main body 1 without finishing the wood surface on the side opposite to the back surface of the buried wood 8 and leaving the skin of the lumber at the time of lumbering. Can also.

The above is an example of application to a girder or a beam, but the same applies to a column or a base as shown in FIG. That is, when the main body of wood 11 (raw wood) is sawn, the slits 12 are inserted, artificially dried, and the fixed grooves 13 are cut to correct the splits. Filled wood 18 is press-fitted into the fixed groove 13 with an adhesive 19, and after solidification of the adhesive 19, a final finishing process is performed, and a back-split wood that can be applied to a pillar or a base having a desired cross section (for example, a square). 20.

The specific method and the like are the same as those of the girder and the beam shown in FIG. FIG. 8 shows the relationship between the size of the cross section of the column material and the spine correction (cutting of the fixed groove) performed thereon. Also, a common cutting tool 14 for cutting the fixed groove 13 can be used. In that case, according to the size of the cross section of the wood main body 11, the fixed groove 13 can be formed by a common cross section so as to reach almost the center thereof. In other words, as the cross sectional dimension of the wood main body 11 increases, The wedge-shaped fixed groove 13 is set so that its own depth is increased. Of course, using different cutting tools according to the cross-sectional size of the wood body 11,
Regular grooves with various groove widths may be formed.

As shown in FIG. 9, a spine split groove 12 is formed in the wood body 11 and is dried to form a V-shaped spine split groove 12 instead of a wedge-shaped (V-shaped). A rectangular shaped groove 13 'can also be formed.
In this case, the embedded wood 18 'having a rectangular cross section corresponding to the cross-sectional dimension is inserted into the rectangular shaped groove 13' and integrated with the main wood 11 by an adhesive or the like. Then, the wood body 11 is finished to a square or a predetermined rectangle, for example. The same applies to FIG. 1. Instead of the V-shaped fixed groove 3, a rectangular fixed groove may be adopted, and the wedge-shaped embedded tree 8 may be replaced by a rectangular padding.

FIG. 10 shows an example of the form in which the above-described back split processed wood 10 used as a girder or a beam and the back split processed wood 20 used as a pillar or a base are actually used. In these treated woods 10 and 20,
The embedded woods 8 and 18 are physically and visually integrated with the wood bodies 1 and 11. If the wood bodies 1 and 11 and the embedded woods 8 and 18 are made of the same kind of wood, and the wood grain and the like are similar, these treated woods 10 and 20 can be made as if they were ordinary solid and back split grooves. I get the impression that it is not lumber. And these treated wood 1
Metal fittings 0 and 20 have been used in place of the conventional method of combining a mortise and a mortise in the framing method.
The present invention can be sufficiently applied to a bracket type construction method in which the insertion of the groove 0 (slit) for inserting the same into the bracket is frequently used.

For example, there is no problem even if the groove 32 for fixing the metal fitting 30 is formed in the pillar member (20).
There is no problem in forming a combination groove (slit) 31 for inserting the metal fitting 30 into the beam member (10). In the case of the pillar member (20), if the part of the spine is present as it is and there is no embedded tree 18, it is difficult to cut the slit 32 for fixing the bracket here in terms of strength and the like. However, since the back split portion is filled with the embedded wood 18 so as to be like an integral pillar, it can be processed substantially in the same manner as a pillar without a back split. The same is true for the beam member (10). In particular, the embedded wood 8 can be further cut to form a slit 31 for fitting insertion. This means that grooves can be formed in the same way as those without the back splitting process. Even if the back splitting process is performed, there is practically no obstacle to applying the bracket assembly method. No. Moreover, since the spine is split, there is no adverse effect of cracking due to drying of the wood. In other words, wood that satisfies the two conflicting demands of eliminating the disadvantages of lowering the appearance and making it difficult to apply metal fittings due to the spine splitting process, and enjoying crack prevention, which is the effect of the spine splitting process. Become.

After the metal fitting 30 is inserted into the slit 32, a bolt 33 is passed through the bolt hole 35 of the metal fitting 30 and the bolt hole 36 of the beam member (10), and is tightened by the nut 34, and the column material is tightened. (20) and the beam (10) are joined. Further, bolts 37 and nuts (not shown) are similarly used for fixing the metal fittings 30 to the column members (20). Alternatively, the metal fitting 30 may be inserted into the slit 32 of the column member (20) and fixed with the bolt 37 or the like in a state where the metal fitting 30 is fixed to the beam member (10) in advance. Here, the bolt holes 36 can be formed so as to straddle the wood body 1 of the beam member (10) and the buried wood 8, so that the back split processed woods 10 and 20 are formed in the same manner as the timber without the back split groove as described above. Can be treated.

The above description is merely an example, and the present invention is not limited to this example. Further, the contents of the attached drawings, for example, the taper angles and the other contents of the fixed grooves and the fillings are not necessarily showing the actual (or optimum) form for understanding of the explanation.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a process when the present invention is applied to a girder or a beam.

FIG. 2 is a view showing an example of a cutting tool for forming a fixed groove for correcting a spine split.

FIG. 3 is a view showing a cutting tool for a similar purpose different from FIG. 2;

FIG. 4 is a view showing still another cutting tool.

FIG. 5 is a diagram showing an example of a relationship between a spine split groove and a fixed groove which are first inserted.

FIG. 6 is a perspective view showing an example of a state where a burying tree is buried in a fixed groove of a wood main body.

FIG. 7 is a diagram showing an example of a process in which the present invention is applied to a pillar or a base.

FIG. 8 is a view showing the relationship between pillars or bases having various cross-sectional sizes and fixed grooves.

FIG. 9 is a process chart showing an embodiment using a rectangular fixed groove and a filling tree.

FIG. 10 is a view showing an example of the use of the back-split wood obtained by the present invention in the metal fitting framing method (however, this is a diagram for explanation and does not faithfully show the actual frame structure).

[Explanation of symbols]

 1, 11 Wood main body 2, 12 Slit groove 3, 13 13 'Regular groove 4, 14 Cutting tool 8, 18, 18' Filled tree 9, 19 Adhesive 10, 20 Slit treated wood 30 Metal fitting

Claims (7)

[Claims] A groove for a back split extending in a longitudinal direction is formed at a predetermined portion of wood such as a pillar, a beam, a girder and the like to form a regular groove,
A burying tree is embedded so as to be in close contact with this fixed groove,
Split-treated wood characterized by being integrated. 2. A wedge-shaped groove is formed in a predetermined portion of wood, such as a pillar, a beam, or a girder, for a back split, and has a wedge-shaped cross section. A back split treated wood, which is embedded and integrated so as to be in close contact with each other, and is finished to a final target cross-sectional dimension. 3. A groove for a back split extending in a longitudinal direction at a predetermined portion of wood such as a pillar, a beam, a girder, etc., is formed in a rectangular cross section to form a fixed groove, and the rectangular groove is also filled in the fixed groove. A split-leaved wood, which is embedded and integrated so that the wood is in close contact with each other, and is finished to the final target cross-sectional dimension. 4. After inserting a slit in a predetermined length of wood, such as a pillar, a beam, or a girder, extending in the longitudinal direction, the wood with the spine is dried, and the groove in the spine is cut to form a regular groove. A buried tree corresponding to the groove cross section is buried and fixed in the fixed groove, and thereafter, the outer surface of the timber is modified and processed to a predetermined size including the back surface of the buried tree, and the spine-treated lumber is processed. A method for producing split-treated wood, characterized in that: 5. After a groove of a back split extending in a longitudinal direction is formed in a predetermined portion of the wood such as a pillar, a beam, a girder, the split wood is dried, and the spine is deformed so that the opening is widened by the drying. The groove is cut into a wedge-shaped cross section whose width increases from the inside toward the outside to form a fixed groove, and a padding of a wedge-shaped cross section corresponding to the groove cross section is embedded in the fixed groove, and then fixed. A method of manufacturing a spine-treated wood, wherein the outer surface of the wood is modified to a predetermined size including the buried wood to obtain a spine-treated wood. 6. After a groove of a back split extending in the longitudinal direction is formed in a predetermined portion of wood such as a pillar, a beam, a girder, the split wood is dried, and the dried split is deformed so that an opening is widened. The groove is cut into a rectangular cross-section to form a fixed groove, and a buried tree having a rectangular cross-section corresponding to the groove cross section is embedded and fixed in the fixed groove, and then the outer surface of the wood includes the buried tree. A method of manufacturing a back-split wood, wherein the wood is subjected to a back-split processing by correcting to a predetermined size. 7. A step of forming a groove for a back split extending in a longitudinal direction at a predetermined portion of wood such as a pillar, a beam, a girder, a step of drying the wood with the back split, and a step of expanding the opening by the drying. Forming a fixed groove by cutting the groove of the spine split into a wedge-shaped cross-section or a rectangular cross-section having an equal width from the inside toward the outside; and a wedge-shaped groove corresponding to the groove cross-section of the fixed groove. Fixing a cross-section or a rectangular cross-section of the embedded wood by press-fitting it into the fixed groove via an adhesive, and correcting the outer surface of the wood to a predetermined size including the embedded wood, Finishing the back surface of the wood so that the outer surface of the wood is flush with the back surface of the wood.