JPH06297405A - Sawmilling method - Google Patents

Abstract

PURPOSE:To safely and easily saw the material wood sent by a wood feeding vehicle into squared timber reduced in warpage by a sawmilling machine so that the end material generated at this time becomes a size and shape easy to handle. CONSTITUTION:Material wood 1 is centered to be attached to a wood feeding vehicle by chucks 2, 2 and set so that a ZX plane becomes parallel to the cutting blade surface of a saw to perform desired step out. The wood feeding vehicle is allowed to run and the material wood is partially subjected to double shearing in parallel to the ZX plane and an end material containing a part most separated from a Z-axis is cut off in a Y-axis direction. In the same way, desired step out is performed with respect to a YZ plane. The wood feeding vehicle is allowed to run and the material wood is partially subjected to double sharing in parallel to the YZ plane and an end material containing a part most separated from the Z-axis is cut off in a X-axis direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sawing off lumber from raw wood fed by a truck.

[0002]

2. Description of the Related Art Here, when the longitudinal reference axis of the raw wood, that is, the center axis of the obtained timber is taken as the Z axis, and the main plane of the raw wood, that is, the center line of the raw wood is regarded as an arc, the center line and the center of curvature It is assumed that the X axis is perpendicular to the Z axis and the Y axis is orthogonal to the Z axis and the X axis on a plane including the. At present, in the case of cutting out lumber from raw wood, the raw wood is centered and attached to a feeding vehicle, a desired step is taken, and the four sides of the lumber are cut out by reciprocating toward and away from a rotating saw. At this time, the raw wood is ZX
After two chamfers are made parallel to the plane, the raw wood is rotated 90 ° about the Z axis as the central axis, and the two planes parallel to the XY plane are ground to form a lumber. However, since there is a non-uniform distribution of the wood structure and strong internal stress in the log, the balance of the internal stress is lost immediately after each time one side is cut out, and distortion occurs when cutting out the timber in this way. There is a problem that the timber will be greatly out of order. In particular, when the single band saw is used to grind one side at a time, the discrepancy becomes noticeable.

Further, the end material produced at this time is considerably large in size and has an unstable shape with an extremely thick base opening and an elongated end opening. There is a problem of dropping from the line and causing an unexpected accident. Furthermore, even if an attempt is made to grind a plate material or the like using this end material, there is a problem that handling of the end material becomes extremely difficult due to its size and shape.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to secure a square timber with a small deviation from a raw wood fed by a saw wheel by a saw truck. Another object of the present invention is to provide a lumbering method in which the material is easily ground and the mill ends generated at that time have a size and shape that are easy to handle.

[0005]

[Means for Solving the Problems] The above-mentioned object is to center a raw wood and attach it to a feeding vehicle, perform a desired step, and reciprocate back and forth toward a rotating saw such as a twin band saw or a single band saw. In the lumbering method of sawing out the four sides of the timber, while rotating the raw wood by 90 ° or 180 °,
This is solved by sequentially cutting off the outermost part partially to form a square bar.

[0006]

With the above-mentioned structure, the sawdust can be used to safely and easily grind the timber with less deviation from the raw wood fed by the saw truck, and the size and shape of the scrap produced at that time are easy to handle. Becomes

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, a raw wood is centered and attached to a feeding vehicle, a desired step is performed, and reciprocating forward and backward toward a rotating saw to grind the four sides of a square lumber. In the lumbering method, a) the process of setting the raw wood so that the ZX plane is parallel to the cutting edge of the saw and performing the desired step, and b) running the feeding car toward the cutting edge of the saw. Then, the raw wood is partially chamfered in parallel with the ZX plane, and the end material including the portion farthest from the Z axis in the Y-axis direction is cut off. C) The YZ plane of the raw wood is a saw blade of a saw. Set to be parallel to the surface, and perform the desired step, d) Run the feeding car toward the saw blade, cut the raw wood into two parts parallel to the YZ plane, and Cutting the end material including the portion most distant from the axis in the X-axis direction. The operations of steps a and b and c and d are performed continuously, but (a, b) and (c, d) do not necessarily have to be performed continuously in the above order.

The present invention will be described in detail below with reference to the drawings. Each of the drawings is a top view showing a state where lumbering is performed by the method of the present invention using a twin band saw, and FIGS. 1 to 7 are top views showing the first to seventh stages thereof, respectively.
FIG. 8 is a top view showing the end stage. In the figure, 1 is a log,
Reference numeral 2 is a chuck provided on a material feeding vehicle (not shown) for holding the raw wood 1, and lines A-A 'to LL' are cutting lines by a band saw.

First, FIG. 1 will be described. The centered log 1 is clamped by a chuck 2 with the Z axis as a reference, and attached to a material feeding vehicle. For this attachment, it is recommended that the applicant of the present application uses the centering method disclosed in Japanese Patent Application No. 2-44509. Then, the bending of the log 1 is checked, and the log 1 is rotated around the Z axis and fixed so that the main plane ZX plane of the log 1 is parallel to the cutting edge surface of the band saw. Next, with respect to the log 1, a cutting line A-
Stepping is performed according to A'and BB ', and the relative positions of the log 1 and the cutting blade are determined. After the step has been completed, the log 1 is sent by the feeding car toward the band saw, and the cutting line A
The plane is ground at -A 'and BB', and then the feeding vehicle backs back to its original position.

Next, in the second step, the chuck 2 is rotated 90 ° about the Z axis, and as shown in FIG.
The YZ plane of the log 1 is made parallel to the cutting edge surface. Then, walking is performed according to the cutting line C-C ', and the relative positions of the raw wood 1 and the cutting blade are determined. After the step is completed, the log 1 is sent again to the band saw, and the plane is cut out at the cutting line C-C '.

Next, as a third step, the chuck 2 is further rotated 90 ° about the Z axis, and as shown in FIG.
The main plane ZX plane of the log 1 is made parallel to the cutting edge surface. Then, the walking is performed in accordance with the cutting lines DD 'and E-E', and after the walking is completed, the log 1 is sent toward the band saw and cut at the cutting lines DD 'and E-E'. The plane is ground.

Next, as a fourth step, the chuck 2 is further rotated 90 ° about the Z axis, and as shown in FIG.
The YZ plane of the log 1 is made parallel to the cutting edge surface. Then, the walking is performed according to the cutting line F-F ', and then the log 1 is sent toward the band saw and the plane is cut out at the cutting line F-F'.

Next, as a fifth step, the chuck 2 is further rotated 90 ° about the Z axis, and as shown in FIG.
The main plane ZX plane of the log 1 is made parallel to the cutting edge surface. Then, walking is performed according to the cutting lines GG 'and H-H', and then the log 1 is sent toward the band saw, and the plane is cut out at the cutting lines GG 'and H-H'. Is
The sawing out of the ZX plane of the timber ends.

Next, in the sixth step, the chuck 2 is further rotated 90 ° about the Z axis, and as shown in FIG.
The YZ plane of the log 1 is made parallel to the cutting edge surface. Then, the walking is performed according to the cutting lines I-I 'and JJ',
After that, the log 1 is sent toward the band saw and cut line I-
The plane is ground at I'and JJ '.

Next, as a seventh step, as shown in FIG. 7, the stepping is performed in accordance with the cutting lines KK 'and LL'. This step is performed without rotating the log 1. After that, the log 1 is sent toward the band saw and cut line KK '.
And the plane L-L 'are ground, and the log 1 is sawn into a lumber as shown in FIG.

When the lumber is cut by the above-mentioned method, even if a part of the raw wood is cut, the stress balance of the raw wood is disturbed and the cut surface is distorted. The surface will not be the constituent surface of the timber because it will be cut off again at. In addition, the stress applied to the log is gradually weakened, and the distortion of the cut surface is reduced as the cutting is repeated several times. In addition, the scraps produced by excision are
Since it has been thinly scraped off several times, it has a size and shape that is easy to handle, so that it is easy to use and accidental accidents due to falling off of scraps can be prevented.

The present invention is not limited to the above embodiment, and for example, a saw blade other than the twin band saw may be used, and when a single band saw is used,
You can grind it by rotating the log by 90 °.
It is recommended to grind one side, then rotate the log 180 ° to grind the opposite side and then grind the remaining two sides in sequence. Further, the number of times the plane is ground and the rotation direction of the raw wood at that time are not limited to those in the embodiment, and the order may be i, b, i, b, c, d, c, d, etc. You may go first at the beginning. Further, the position where the chuck is clamped to the raw wood, the shape of the chuck and the raw wood, and the like can be freely modified within the scope of the object of the present invention, and the present invention can be easily conceived by those skilled in the art from the above description. All modified examples are included.

[0018]

EFFECTS OF THE INVENTION Since the lumbering method according to the present invention is constructed as described above, according to the present invention, it is possible to safely and easily grind a square timber with a few deviations from a raw wood and use a scrap produced at that time. It can be easily sized and shaped.

[Brief description of drawings]

FIG. 1 is a top view showing a first stage of a lumbering method according to the present invention.

FIG. 2 is a top view showing the second stage.

FIG. 3 is a top view showing the third stage.

FIG. 4 is a top view showing the fourth step.

FIG. 5 is a top view showing a fifth step thereof.

FIG. 6 is a top view showing the sixth step.

FIG. 7 is a top view showing the seventh step.

FIG. 8 is a top view showing the ending stage.

[Explanation of symbols]

 1 ・ ・ ・ ・ ・ ・ Log 2 ・ ・ ・ ・ ・ ・ Chuck A-A '... Cutting line BB' ... Cutting line C-C '... -Cutting line DD '... Cutting line EE' ... Cutting line FF '... Cutting line GG' ... Cutting line H-H '... Cutting line I-I' ... Cutting line J-J '... Cutting line KK' ... Cutting line LL '. Cutting line

Claims (3)

[Claims] 1. A lumbering method for centering and mounting a raw wood on a feeding vehicle, carrying out a desired step, and reciprocatingly moving toward and away from a rotating saw to grind four sides of a lumber. The lumbering method described above, which comprises: B) A step of setting the raw wood so that its ZX plane is parallel to the cutting edge surface of the saw and performing a desired step. (B) A process of running a feeding car toward the cutting edge of the saw, partially chamfering the raw wood in parallel to the ZX plane, and cutting off the end material including the portion farthest from the Z axis in the Y axis direction. . C) A step of setting the raw wood so that its YZ plane is parallel to the cutting edge surface of the saw and performing a desired step. D) A process in which a feeding car is run toward the cutting blade of the saw, the raw wood is partially chamfered in parallel with the YZ plane, and the end material including the portion farthest from the Z axis in the X axis direction is cut off. . 2. The sawing method according to claim 1, wherein the saw blade is a twin band saw. 3. The lumbering method according to claim 1, wherein the saw machine is a single band saw, and the steps of (b) and (d) each include the following steps. B) Run a feeding car toward the cutting blade of the saw, partially cut one side of the raw wood parallel to the ZX plane, and cut off the end material including the part farthest from the Z axis in the Y axis direction. And then rotate the log 180 ° around the Z axis to make the desired walk,
Part of the other side of the log is cut parallel to the ZX plane and Y
A step of cutting off the end material including the portion most distant from the Z axis in the axial direction. D) Run a feeding car toward the saw blade, partially cut one side of the raw wood parallel to the YZ plane, and cut off the end material including the part farthest from the Z axis in the X axis direction. And then rotate the log 180 ° around the Z axis to make the desired walk,
Cut the other side of the log partially parallel to the YZ plane and X
A step of cutting off the end material including the portion most distant from the Z axis in the axial direction.