JPH0596503A - Automatic wood turning method by 180 degrees in sawing machine - Google Patents

Abstract

PURPOSE:To make the automatic and precise turning of material wood by 180 degrees possible after the completion of sawing of a first face of the material wood set on a carriage. CONSTITUTION:The width of the wood, the first face of which is sawn, is detected under the condition that the wood is seen from its vertical direction. Next, the continuation of the detection of the dimension of the width of the wood is performed during the turning of the wood so as to judge the turning of the wood by 180 degrees on the basis of the change of the detected values with the change of the angle of rotation of the wood.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention saws the first surface of the raw wood set in the material feeding vehicle and then rotates the sawing material by 180 ° to bring the first sawing surface into complete contact with the head block. The present invention relates to a 180 ° automatic wood picking method in a sawmill.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 20, a feeding vehicle is provided with a guide rail 1 laid in a straight line, a feeding vehicle main body 2 traveling on the guide rail, and a feeding vehicle main body. Head block support base (hereinafter referred to as a boat)
3 and a head block 4 mounted on the boat 3 so as to be slidable in a direction perpendicular to the moving direction of the material feeding vehicle main body 2. The sawdust 5 is positioned by the boat 3 and the head block 4 and The head block 4 is slid with respect to the boat 3 to determine the remaining dimension 1 of the sawdust 5, that is, the dimensions of the band saw 6 of the band saw machine and the front surface of the head block 4, and the feeding vehicle The sawing material 5 is configured to be ground by the band saw 6 by causing the main body 2 to travel along the guide rails 1.

A method for removing wood from a raw tree is shown in FIG.
As shown in (a) of FIG. 1, after sawing the first surface a by the remaining dimension step, the sawing material is rotated by 180 ° as shown in FIG. The second surface B parallel to the surface is sawn, and then the third surface C and the fourth surface D perpendicular to the first surface and the second surface are sawed as shown in FIG. There is.

[0004]

In the above wood removing method, the sawing of the third surface c and the fourth surface d is performed on the basis of the already sawed first surface a or second surface b. It is relatively easy, but sawing the second side
Since an accurate 180 ° tree picking is required, it requires considerable experience and intuition to get a good yield of trees, and the tree needs a considerable amount of time for picking, resulting in poor efficiency. There is. In particular, recently, automation by microcomputer control has been promoted, but there are various shapes of raw wood,
In any case, it is extremely difficult to automatically perform an accurate 180 ° tree picking operation. Therefore, only the 180 ° tree picking method has been used in the past, although other processes are automated. Is currently dependent on manual operation by a skilled person, and for this reason, automation of 180 ° wood picking is strongly demanded in the lumber industry.

The present invention has been achieved as a result of various experimental studies in order to meet the above-mentioned demands, and is a lumber capable of performing an accurate 180 ° automatic wood picking regardless of the shape of raw wood. It is an object to provide a 180 ° automatic tree picking method in a machine.

[0006]

In order to achieve the above-mentioned object, the present invention saws the first surface of the sawing material, and then detects and stores the width dimension A when viewed from the vertical direction. Every
Then rotate the material while continuing to detect the width dimension,
When the detected width dimension becomes equal to the first detected width dimension A, it is judged as 180 ° wood picking and the rotation of the material is stopped, and the first sawing surface is crimped to the head block for the next step. It is characterized by transition.

Further, according to the present invention, after sawing the first surface of the sawn timber, the width dimension viewed from the vertical direction is detected, and then the timber is rotated while continuing the detection of the width dimension, and the detection is performed. The moment when the width dimension reverses from descending to ascending is judged as 180 ° wood picking, the rotation of the material is stopped, the first sawing surface is crimped to the head block, and the process moves to the next step. To do.

Further, according to the present invention, after sawing the first surface of the sawn timber, the sawn timber is supported on the turning means in a state where the turning center of the V-shaped turning means and the center of the saw are matched, and In that state, the width dimension E from the center of the material to the first sawing surface and its direction are detected and stored, and then the material is removed by the V-shaped turning means while continuing to detect the width dimension and its direction. When it is rotated and it is detected that the detected width dimension is the same as the stored width dimension and is in the opposite direction, it is determined as 180 ° wood picking and the rotation of the material is stopped, and the first sawing surface Is bonded to the head block and the process is shifted to the next step.

Further, according to the present invention, there is provided first detecting means for detecting whether or not the detected width dimension of the material becomes equal to the width dimension initially detected, and whether or not the detected width dimension of the material is reversed from descending to ascending. And second detection means for detecting whether or not the width dimension from the center of the material to the first sawing surface is the same as the width dimension initially detected and in the opposite direction. Means and a 180 ° tree picking point estimation time setting means determined by the material diameter and turning speed, the 180 ° tree picking point estimation time setting means sets a width of time set in the setting means Within the time and when at least one detection signal of any of the first to third detection means is output, it is determined that the wood is 180 ° and the rotation of the material is stopped, and the first sawing surface. Special feature is to press the head block to the head block and move to the next process. To.

[0010]

When the first surface of the raw wood is sawed and then the material is rotated while continuing to detect the width dimension of the material, the width dimension detection signal has a minimum value before the material is rotated, and gradually increases as the material rotates. As it rises, the diameter of the material is detected when it reaches a certain rotation angle, it becomes almost constant, gradually decreases when approaching 180 ° rotation, returns to the initial minimum value at the 180 ° rotation position, and rises again when further rotating. To do. According to the result of the experiment, the maximum width is obtained when the rotation angle is about 8 °, and the maximum width is 180 ° -8.
It begins to decrease at 0 ° and reaches a minimum again at 180 °.

The first aspect of the invention utilizes the change in the detection signal as described above to judge that the rotation is 180 ° when the detection signal reaches the minimum value. This method can also be carried out by utilizing the conventional rotating means of the turning chain that rotates the material by the turning chain while pressing the material against the head block, but in that case, there is an error due to the raising angle of the turning chain, etc. It may occur. Therefore, when carrying out the first invention, it is desirable that the material is supported by the V-shaped turning chain and is rotated about the center of the material.

A second aspect of the invention is to judge a 180 ° tree picking by catching the time when the detected value returns to the initial minimum value at the 180 ° rotational position and then reverses and rises. Alternatively, the material can be rotated by a turning chain based on the conventional head block, but it is desirable to rotate the material by V-shaped turning means as in the first aspect of the invention.

According to a third aspect of the present invention, the material is supported by the V-shaped turning means, and the width dimension from the reference position to the first sawing surface is 0 ° with respect to the rotation center of the material, that is, the turning center position. And 180 ° are the same, and the directions thereof are opposite, and the 180 ° tree picking is detected.

A fourth invention is the first invention, the second invention,
In addition to the detecting means according to the third aspect of the present invention, a 180 ° wood picking point estimation time setting means determined by the material diameter and the turning speed is provided, which is within the setting time, and
When the signal of at least one of the third to third detecting means is output, it is determined that the 180 ° tree is a bark. According to this method, no matter what shape the log is, it is always very accurate. 180 ° tree can be picked up.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are explanatory views of the first invention and the second invention. As shown in FIG. 1 (A), after sawing the first surface a, the far-infrared sensor (not shown) detects the width dimension A of the material with respect to the front surface of the head block 4,
Then, a conventional turning chain (not shown) is driven to rotate the material as shown in FIG. 1 (B) → FIG. 1 (C) → FIG. 1 (D), and the width dimension of the material is detected. By doing so, as shown in FIG. 2, the minimum value A was initially set, but the detected value increased until the rotation angle was about 8 °, and the rotation angle was changed from about 8 ° to 180 °.
Up to ° -8 °, the diameter of the material is detected and the value becomes almost constant B (of course, the material is not a round circle, so it fluctuates slightly).
The detected value starts to drop from the 0 ° -8 ° position, a value C equal to the first detected value A is detected at the 180 ° position, and the detected value D rises when the material is further rotated.

The first invention utilizes the fact that the detected values A and C are equal at the time of 180 ° tree picking, and its flowchart is as shown in FIG. That is, when the detected value C becomes equal to A, it is determined that the 108 ° tree is picked up.

The second aspect of the present invention judges that the time point when the detected value reverses from falling to rising is 108 ° tree picking, and its flowchart is as shown in FIG.

3 and 4 are explanatory views of the third invention. As shown in FIG. 3 (A), the material obtained by sawing the first surface a is supported by the V-shaped turning chain 7 with the turning center O ′ of the V-shaped turning chain and the center O of the material aligned. In this state, the width dimension E and the direction from the center O of the material to the first surface B are detected, and then the V-shaped turning chain 7 is driven to rotate the material while continuing the detection of the width dimension and the direction. Then, when it is detected that the detected value is in the opposite direction to E and is the same value F, it is determined that the 180 ° tree picking is performed. A flow chart in this case is shown in FIG. 7.

FIG. 8 shows the first detecting means shown in FIG. 5, the second detecting means shown in FIG. 6, and the third detecting means shown in FIG. It is a flow chart which shows the 4th invention for making a 180 degree tree clearing. That is, the present invention is provided with a 180 ° tree pick point estimation time setting means that is determined by the material diameter and the turning speed, and sets the width of time in the 180 ° tree pick point estimation time setting means, Within the set time and when at least one detection signal of any of the first to third detection means is output, it is determined that the 180 ° tree is a bark. According to this method, even if there is some error in any of the detection signals of the first to third detecting means, the accurate 180 ° tree picking can always be performed automatically.

FIGS. 9 to 19 are explanatory views showing each step which is one embodiment of the present invention. In these figures, 7
Is a V-shaped turning chain, which is configured to be able to take a lowered position and a raised position by a cylinder 8. An automatic hand device 9 is provided on the side of the V-shaped turning chain. The device 9 moves the auto hand 9b forward and backward by the telescopic cylinder 9a, and moves the auto hand 9b by the undulating cylinder 9c.
Is configured so that it can be undulated.

As shown in FIG. 9, the raw wood is fixed by the upper and lower snares 10 and the first surface B is sawed (similar to the conventional one). Next, the head block is retracted so that the turning center of the V-shaped turning chain 7 and the center of the material coincide with each other (FIG. 10), and then the cylinder 8 is extended to support the material on the V-shaped turning chain 7. Open 10 (FIG. 11).

In this state, the far-infrared sensor (not shown) detects the width dimension A, the width dimension E and the direction thereof, and then drives the V-shaped turning chain 7 while continuing the above detection ( 12), 180
° When the wood picking is detected, the V-shaped turning chain 7 is stopped (Fig. 13). Below the head block, the V-shaped turning chain 7 and the automatic hand device 9 shown in FIG.
And, while supporting the material on the V-shaped turning chain 7, the telescopic cylinder 9a is driven to advance the auto hand 9b, and the undulating cylinder 9c is driven to raise the auto hand 9b ( 15 and 16),
Next, the telescopic cylinder 9a is retracted to bring the first sawing surface of the material into close contact with the head block (Fig. 17), and in that state, the material is fixed by the scraper 10 (Fig. 18), and the automatic hand device 9 is returned. (FIG. 19), the process proceeds to the second face sawing step.

The above detection and transition to each step are all controlled by a microcomputer.

[0024].

As described above, according to the present invention, it is possible to obtain an extremely accurate value which cannot be achieved by the prior art.
There is an effect that 80 ° automatic tree picking can be achieved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing each state when a material obtained by sawing the first surface is rotated with a head block as a reference.

FIG. 2 is an explanatory diagram showing a change in a detection width dimension when a material obtained by sawing the first surface is rotated with the head block as a reference.

FIG. 3 is an explanatory view showing each state when a material obtained by sawing the first surface is rotated around the center of the material.

FIG. 4 is an explanatory diagram showing changes in the detection width dimension and its direction when the material obtained by sawing the first surface is rotated around the center of the material.

FIG. 5 is a flowchart of the first invention.

FIG. 6 is a flowchart of the second invention.

FIG. 7 is a flowchart of the third invention.

FIG. 8 is a flowchart of the fourth invention.

[Fig. 9]

FIG. 19 is an explanatory diagram of each step showing the embodiment of the present invention.

FIG. 20 is a configuration diagram of a general feeding vehicle.

FIG. 21 is an explanatory diagram of a method for removing wood from raw wood.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Guide rail, 2 ... Feeder vehicle main body, 3 ... Boat, 4 ... Head block, 5 ... Grinding material, 6 ... Band saw, 7 ... V-shaped turning chain, 9 ... Auto hand device, 10 ... Cassie.

Claims (4)

[Claims] 1. After sawing the first surface of the sawing material, the width dimension A as viewed from the vertical direction is detected and stored, and then the material is rotated while continuing the detection of the width dimension, When the detected width dimension becomes equal to the first detected width dimension A, it is judged as 180 ° wood picking and the rotation of the material is stopped, and the first sawing surface is crimped to the head block for the next step. A 180 ° automatic wood picking method in a sawmill, which is characterized by a transition. 2. After sawing the first surface of the sawn timber, the width dimension viewed from the vertical direction is detected, and then the timber is rotated while continuing the detection of the width dimension, and the detected width dimension is lowered. In the sawmill, the moment when it is turned upside down is judged to be 180 ° wood picking, the rotation of the lumber is stopped, the first sawing surface is pressed against the head block, and the process moves to the next step. 180 ° automatic tree picking method. 3. After sawing the first surface of the sawn timber, the sawn timber is supported on the V-shaped turning means in a state where the turning center of the V-shaped turning means and the center of the timber are aligned, and
In that state, the width dimension E from the center of the material to the first sawing surface and its direction are detected and stored, and then the material is removed by the V-shaped turning means while continuing to detect the width dimension and its direction. When it is rotated and it is detected that the detected width dimension is the same as the stored width dimension and is in the opposite direction, it is judged as 180 ° wood picking and the rotation of the material is stopped,
A 180 ° automatic wood picking method in a sawmill, characterized in that the first sawing surface is pressure-bonded to the head block and the process proceeds to the next step. 4. A first detecting means for detecting whether or not the detected width dimension of the material has become equal to the width dimension initially detected,
Second detection means for detecting whether or not the detected width dimension of the material reverses from descending to ascending, and the width dimension from the center of the material to the first sawing surface is the same as the initially detected width dimension. And third detecting means for detecting whether or not the directions are opposite,
A 180 ° tree pick point estimation time setting means determined by the material diameter and turning speed is provided, and a time of a certain width is set in the 180 ° tree pick point estimation time setting means, and within the set time. And when at least one detection signal of any of the first to third detection means is output 180
° The automatic 180 ° wood removing method in a sawing machine, characterized in that the rotation of the wood is stopped when it is judged as the wood cutting, and the first sawing surface is pressed against the head block to move to the next step. ..