JPH0966501A - Scantling method for boxed square timer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to reduce the deformation of a product material particularly after scantling in a method for scantling the four surfaces of a round timber-like log to obtain a boxed square timber as the product material. SOLUTION: This method for scantling boxed square timber comprises the step of scantling the four surfaces of a round timber-like log A0 to obtain the boxed square timber by substantially bringing the center of the square timber of a tip end a1 side into coincidence with an annual ring core P0 .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for grounding four sides of a log-shaped raw tree to obtain a cored square timber as a product material, and particularly to reduce deformation of the product material after being ground. The present invention relates to the new method.

[0002]

BACKGROUND OF THE INVENTION Under the recent automated system, when a cored timber used as a pillar material or the like is cut out from log-shaped logs such as cedar and cypress, the bending and diameter of the logs are measured. In addition, a macro computer or the like determines the most efficient cutting state, and in this state it is sent to a sawing device such as a double saw band saw. However, in the conventional method, after detecting the log shape,
What is taken into consideration when deciding the cutting attitude is to improve the yield, that is, to obtain a lumber of the maximum thickness from raw wood, so that the product material after cutting may warp or go wrong. there were. In other words, the square timber that has become the product material is to have the annual ring core aligned with the square timber center, at least at the end opening side, which is the small-diameter end of the raw wood, as an effective means for avoiding warping or getting out of order. However, as described above, in the conventional method in which only the improvement of the yield is taken into consideration, the annual ring core is often disregarded, and the above-mentioned problems occur.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of such a background, and a novel method for cutting a cored timber that can suppress the deformation after it is made into a product material. Is to develop.

[0004]

[Means for Solving the Problems] That is, according to the method of cutting a cored timber of claim 1, in order to obtain a cored timber by cutting off four sides of a log-shaped raw wood, the timber center on the end mouth side is an annual ring core. It is characterized in that it is made to substantially match with. By taking such a means, in the product material that has been cut and split, the center of the annual ring of the raw wood almost matches the center of the lumber on the end opening side, which prevents deformation of the product material afterwards. .

Further, in addition to the above requirements, the method for cutting a cored timber according to a second aspect is such that, in order to substantially match the center of the timber at the end opening side with the annual ring core, a temporary core of the raw wood is determined, and then the raw wood is cored. It is characterized in that it is transferred to an output device and the annual ring core of the raw wood is detected there. By adopting such means, subsequent processing is performed in a state where the end ring side annual ring core is secured at the stage of detecting the log shape.

In addition to the above requirements, the method of cutting a cored square timber according to claim 3 is characterized in that the annual ring core of the raw wood is marked in advance.
By taking such means, it is possible to visually confirm the operation of aligning the end ring side annual ring core with the center of the lumber while observing the image captured by the work CCD camera.

Further, in addition to the above-mentioned requirements, the method for dividing a cored square timber according to claim 4 is characterized in that a CCD camera is used to detect the annual ring core of the raw wood. By taking such means,
If you mark in advance on the core ring of raw wood,
The position can be detected more reliably.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be specifically described based on the illustrated embodiments. 1 and 2 show a skeletal structure of a lumbering machine 1 on which the method of the present invention is carried out, and a posture in which a raw material A ₀ is regulated by the sawing device 2 and the sawing device 2 which directly bear the sawing work. Material feeding device 3 for feeding the raw wood A ₀ from another stockyard, and further, a wood removal setting for substantially implementing the present invention between the material feeding device 4 and the material feeding device 3. And device 5. The wood removal setting device 5 roughly includes a temporary setting device 6, a centering device 7, and a charging device 8.

First, as an example, the sawing device 2 employs a band sawing machine 11 of a double sawing type, which has a known structure. Note that reference numeral 12 is a band saw blade that directly performs the sawing work. Of course, it is not limited to such a double saw band saw, and may be a single saw or a quad saw, or not limited to a band saw and may be a single saw or a multiple saw.

Next, the material feeding device 3 is a device for feeding the raw wood A ₀ while maintaining an accurate posture so that the material can be precisely ground into the material cutting device 2. As a member, a wheel 14 attached below the member rolls on a rail 15 so that the wheel 14 is movable toward the sawing device 2. Further, the material feeding base 13 is provided with a scraper device 16. It is desirable that the Cassie device 16 be configured so that at least the cut raw wood A ₀ can be inverted by 90 °. Further, it is more desirable that the raw wood A _{0 held} by the mussel device 16 can be adjusted so as to shift the holding center in a further minute range. It is needless to say that there are various known methods for these configurations, and those methods can be applied as appropriate, and a mechanism that can be developed later can be applied.

[0011] Next will be described. Wood infeed device 4, one for each of the wood A ₀ to the tip of the storage conveyor 17 this compound was as capture the timber A ₀ in the number of appropriate quantities,
It is provided with a step feeder 18 which can be fed to the wood setting device 5. There are various known mechanisms for this device as well, and these can be appropriately applied.
It goes without saying that the mechanism developed after that can be applied.

Next, the Kitori setting device 5 will be described. First, the temporary setting device 6 will be described. This is a device for performing a preliminary work for supplying the raw wood A ₀ for each one from the material feeding device 4 through the step feeder 18 and receiving the raw wood A ₀ and supplying it to the next centering device 7. Is. Specifically, as an example, it is provided with a drum-shaped live roller 20, and the live roller 20 is configured to be rotatable around a frame pivot 21 thereof, and a transfer centering stand 24, which will be described later, in the centering device 7. In order to transfer the raw wood A ₀ to, it can be moved downward. Incidentally, this live roller 20 causes the transfer of the timber A ₀ in the longitudinal direction, Sueguchi a ₁ side of the timber A ₀ (the small diameter end side) is brought into contact with the stopper, so that align the Sueguchi a ₁ side of the timber A ₀ Perform an action. A diameter measuring device 22 is installed opposite to the side of the live roller 20 so as to be able to move up and down. For example, a transmitter / receiver such as a photoelectric device is provided in a pair, and the height of the transmitter / receiver is measured to measure the size of a state where the photoelectric signal is cut off to roughly measure the diameter of the log A ₀ .

The range sandwiched between the temporary setting device 6 and the material feeding device 3 is used as the centering zone 23, and the centering device 7 is provided there. First, the temporary setting device 6
A transfer centering stand 24 is provided so as to be able to reciprocate between the centering device 7 and the centering device 7.
It is configured so that it can be traversed by being guided by. An elevating stand 26 for directly supporting the log A ₀ is assembled by a shift cylinder 27 so as to be able to move up and down.

A CCD camera 28 is provided in the centering zone 23.
Are provided so that they can be moved out when they are not needed. With these, the end opening a ₁ and the original opening a _{2 of the} raw wood A ₀ are imaged so that they can be visually observed. Further, near the holding position of the raw wood A ₀ in the centering zone 23, a centering snare 29 for rotationally driving the raw wood A ₀ for measuring the shape of the raw wood A _{0 is provided.}
It is provided on the end opening a ₁ side and the main opening a ₂ side. A sensor 30 for discriminating the shape of the log A ₀ is further provided near the log A ₀ in the centering zone 23. Specifically, a laser sensor or the like is arranged to irradiate the log A _0. There is.

Next, the charging device 8 will be described. This one is the charging rail 3 installed on the top
1, a charger unit 32 is movably attached to the charger unit 1, and the charger unit 32 has a charger claw 33 for directly gripping the log A ₀ . The charger claw 33 is configured to be movable up and down or rotatable so as to lift at least the lower end of the charger claw 33 in consideration of the movement when the gripping action is not performed. It should be noted that such a charging device 8 itself is already known, and those are appropriately applied.

The method for cutting the cored square timber of the present invention is carried out by using such an apparatus. (1) Supply of raw wood The raw wood A ₀ is waiting on the stock conveyor 17 of the material feeding device 4 as shown in the figure, but as shown in FIG. It is transferred to the temporary setting device 6 side. The raw wood A ₀ is transferred to the centering zone 23 at the latest, and the annual ring core P ₀ of the end opening a ₁ is sent.
Is marked on. As a specific marking means, a circular colored label having a diameter of about several mm is attached, or a magnetic material is driven in. That is, the log A ₀ is supplied onto the drum-shaped live roller 20 which faces the vicinity of the tip of the step feeder 18. And at this position, first log A
_In order to set the end on the side of the end opening a _{1 of 0} to the reference position,
As shown in (b), the live roller 20 rotates and the raw wood A
Stop by applying the end opening a ₁ of ₀ to the stopper. Then, as shown in FIG. 3 (c), the diameter measuring device 22 passes from the lower part to the upper part while passing upward to the upper end of the log A ₀ , and the sensor signal is interrupted during this period, so that the log A ₀ is temporarily cut. Measure the diameter of.

(2) Movement to the centering device The raw wood A ₀ thus held on the live roller 20 is received by the transfer centering stand 24 of the centering device 7 standing by below it. . Specifically, Fig. 4
As shown in (a), the elevating stand 26 receives the raw wood A ₀ in a supported state, and the live roller 20 retreats downward around the frame pivot 21 to be taken up on the transfer centering stand 24. In such a state, the transfer centering stand 24 moves to the centering zone 23 as shown in FIG. 4 (b). Then, in the centering zone 23, since the approximate outer shape of the raw wood A ₀ has already been detected in the previous process, the temporary core of the raw wood A ₀ can be chucked by the centering snare 29 according to the detected value. Raise it to the correct position.

[0018] (3) late, especially in Sueguchi a ₁ side of the timber A ₀ in detecting such a state of annulus core mouth, CCD camera core (i.e. Kasagui 2 for which output lead
9 is aligned with the core on the side of the end opening a _{1 of} 9).
As shown in (c), it is raised or the transfer centering stand 2
4. Move the whole 4 in the transverse direction. Of course, the same operation may be performed on the side of the base opening a _{2 in} order to search for the annual ring core P ₀ of the log A ₀ .

(4) Shape Detection After holding the log A ₀ in such a state as shown in FIG. 5A, the CCD camera 28 retreats sideways, and subsequently the centering snare 29 moves forward. Sueguchi a ₁ and the butt a of wood a ₀
Chuck ₂ and. Thereafter, as shown in FIG. 5B, the centering snare 29 rotates and the raw wood A ₀ rotates,
Laser light or the like from the sensor 30 in the vicinity of the timber A ₀ is irradiated on wood A _0, data of the outer shape.

(5) Determining the tree-cutting position Based on such data, the most efficient tree-cutting position that can be used as the core holding square is indexed by the microcomputer and the centering work is performed. Specifically, centering casga 2
9 itself moves up, down, left, and right to determine the pattern of sawing.

(6) Movement by Charging Device As shown in FIG. 6A, the charger unit 32 in the charging device 8 is moved to the position thus determined.
The charger claw 33 of the grips the log A ₀ from the left and right. By the way, the charger claw 33 has a touch sensor in the grip portion,
The raw wood A ₀ which has already been centered is held in a state where the position of the raw wood A ₀ is not displaced, and the held position is stored according to the held position. In this state, the charger unit 32 laterally moves on the charging rail 31 in a suspended state, and transfers the log A ₀ to the material feeding device 3. The shredded posture of the raw wood A ₀ sent in this way is retained as it is, and is held at the already-indexed core position by the scraper device 16 in the material feeding device 3. At this time, in particular, on the trailing edge a ₁ side of the raw wood A ₀ , the annual ring core P ₀ is set so as to match the center P ₁ of the timber of the product material A ₁ as shown in FIG. 7B.

(7) Grinding After such chucking, the material feeding base 13 is transferred to the grinder 2 side by a conventional method, and as shown in FIG. First, the two sides of ₀ are ground, so-called drum grinding is performed, and then the raw wood A ₀ is returned to the starting position, the Casgay device 16 is inverted by 90 °, and the raw wood A ₀ is rotated by 90 ° again, and the grinding device 2 is again cut. It is sent to the side and the remaining two surfaces are ground to finally obtain the product material A ₁ as the cored square. In such a method, the first point is to make the annual ring core P ₀ on the end opening a ₁ side coincide with the center P ₁ of the timber, for example, but the remainder is shown in FIG. 8 (b). extremely yield of Kidori deteriorates, or if such as the thickness of the product material a ₁ is excessively thin, the the annulus core P ₀ and timbers center P ₁ as shown in FIG. 8 (c) as It is possible to shift the matching range to a somewhat allowable range so that an advantageous shape as the product material A ₁ can be obtained.

[0023]

As described above, according to the present invention, at the end opening a ₁ of the raw wood A ₀ , the annual ring core P ₀ and the product material A as the core holding square material are provided.
Since the timbers center P ₁ in _1, it meets almost
After becoming the product material A ₁ , it is possible to prevent the occurrence of a situation such as deformation of the product material.

[Brief description of drawings]

FIG. 1 is a skeletal front view showing a lumbering apparatus for carrying out the method for cutting a cored square timber of the present invention.

FIG. 2 is a skeletal plan view of the same.

FIG. 3 is an explanatory view showing stepwisely a method of cutting a cored lumber of the present invention, among which a front view and a plan view showing a state of supplying raw wood.

FIG. 4 is a front view showing a state of movement to the centering device and a state of detecting an end ring annual ring core.

5A and 5B are a plan view and a front view showing a state of detecting the shape of the same raw tree.

FIG. 6 is a front view showing a state of movement and a state of sawing by the same charging device.

FIG. 7 is an explanatory view showing a mode of cutting the cored lumber when the annual ring core is located near the center of the raw tree.

FIG. 8 is an explanatory view showing two types of sawing modes of the cored square lumber when the annual ring core is located slightly deviated from the center of the raw tree.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Lumbering equipment 2 Grinding equipment 3 Material feeding equipment 4 Material feeding equipment 5 Kitori setting equipment 6 Temporary setting equipment 7 Centering equipment 8 Charging equipment 11 Band saw blades 12 Band saw blades 13 Feeding rack 14 Wheels 15 Rails 16 Cassie equipment 17 Stock Conveyor 18 Step Feeder 20 Live Roller 21 Frame Pivot 22 Diameter Measuring Device 23 Centering Zone 24 Transfer Centering Platform 25 Linear Guide 26 Lifting Platform 27 Shift Cylinder 28 CCD Camera 29 Centering Cassie 30 Sensor 31 Charging Rail 32 Charger Unit 33 Charger claw A ₀ Log A ₁ Product material a ₁ End opening a ₂ Main opening P ₀ Annual ring core P ₁ Square timber center

Claims (4)

[Claims] 1. A method for cutting a cored timber, characterized in that when the four sides of a log-shaped log are ground to obtain a cored timber, the center of the timber on the end opening side is made to substantially coincide with the annual ring core. . 2. When the center of the lumber on the end opening side is made to substantially coincide with the core of the annual ring, after setting the temporary core of the raw wood, the raw wood is transferred to the centering device, and the annual ring core of the raw wood is detected there. The method of sawing a cored timber according to claim 1, characterized in that. 3. The method for dividing a cored timber according to claim 1 or 2, wherein the annual ring core of the raw wood is marked in advance. 4. The method for cutting a cored timber according to claim 1, wherein a CCD camera is used to detect the annual ring core of the raw wood.