JP3182234B2 - Veneer lace - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a veneer lace which cuts a veneer by moving a plane table provided with a knife by an advance / retreat mechanism in synchronization with the rotation of a spindle for holding and rotating a log.

[0002]

2. Description of the Related Art Conventionally, veneer laces for cutting a wood while rotating the wood with a spindle have been widely used as an apparatus for manufacturing a veneer by cutting a wood.

In such a conventional veneer race, a driving force of a driving motor for driving a spindle is transmitted to a reciprocating mechanism for reciprocating a plane table via a clutch mechanism, a speed change mechanism, etc., so that the rotation of the spindle is controlled. It is constituted so that the plane table on which the knife is arranged may be synchronized and moved forward.

[0004] Also, the change of the stepping speed (stepping amount) is as follows.
It is configured to change the transmission gear by changing the transmission gear of the transmission mechanism. In such a case, the transmission gear is changed while the driving force is cut off by pressing the retreat button or the like to temporarily retreat the plane table and interrupt the driving force by the clutch mechanism. Many are configured as follows.

[0005]

However, in the above-mentioned conventional veneer race, after the plane table is once retracted, when starting to feed and restarting the cutting of the raw wood, the plane table is gradually operated by manual button operation. It is necessary to move the knife closer to the log by moving forward, and to resume stepping from this state. For this reason, there is a problem that the operation is difficult and time is required, which causes a decrease in productivity.

In addition, before and after such interruption of cutting, a cut portion having an uneven cut thickness is formed on the veneer, which causes a reduction in yield. In particular, when cutting is resumed, cutting is interrupted midway, so the outer shape of the raw wood is not a perfect circle but a distorted shape, so depending on the position where the knife is applied, cutting is usually resumed. Unable to cut a veneer of a predetermined thickness until the raw wood turns two or three times, and when the diameter of the raw wood is 1 to 2 meters, the length is several meters to several tens of meters, and the cut thickness is uneven. Will occur. For this reason, it has been desired to reduce the non-uniformity of the cut thickness as much as possible to improve the yield and the productivity.

The present invention has been made in view of such a conventional situation, and is capable of improving operability and yield as compared with the prior art, and contributing to an improvement in productivity. It is intended to provide a race.

[0008]

That is, a veneer lace according to the present invention is a veneer lace which cuts the log by synchronizing the rotation of a spindle for holding and rotating the log and moving the plane table by an advance / retreat mechanism. A spindle rotation angle detection unit that outputs the rotation angle information of the spindle, a plane table position detection unit that outputs the position information of the plane table, and a control unit that controls the advance / retreat mechanism in synchronization with the rotation of the spindle. When the stepping of the plane table is interrupted and the plane table is retracted, the rotation angle information and the position information at the time of interruption are stored, and when the stepping is resumed, the plane table is advanced to a predetermined position based on the position information. is, based on the rotation angle information, the raw wood has been interrupted cutting
Control means for restarting the advancing at the same timing so as to restart the cutting from the outer peripheral position .

[0009]

In the veneer race of the present invention having the above-described structure, when the feed of the plane table is interrupted and the plane table is moved backward, the control means stores the rotation angle information of the spindle and the position information of the plane table when the feed is interrupted. I do. Then, at the time of restarting the step feed, the plane table is automatically advanced to a predetermined position based on the position information, and thereafter, the step feed is restarted based on the rotation angle information.

Therefore, the operability can be improved as compared with the prior art, and the restart after the interruption of the cutting can be performed simply and quickly. In addition, since the cutting can be resumed from the cutting interruption position of the raw wood, the length of the portion where the cutting thickness of the veneer is not uniform before and after the interruption of the cutting can be suppressed very slightly, and the yield can be improved. .

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a veneer race according to an embodiment of the present invention.
2 shows a spindle for supporting and rotating the spindle. A main motor 3 as a drive source is connected to the spindle 1 via a drive mechanism (not shown). This main motor 3
Is configured so that the rotation speed can be controlled by a speed controller 5 via a controller control device 4, and the rotation speed can be detected by a log rotation speed detection device 6.

A knife 7 is attached to the side of the spindle 1, and a plane table 9 provided with a roller 8 at the bottom is provided. A lower plane table guide 10 is provided below the plane table 9, and a plane table guide 11 is provided beside the plane table 9. A pressure bar 13 attached to a pressure bar body 12 is provided above the plane table 9 so that a desired cutting edge can be set between the plane table 9 and the knife 7 by a position adjusting mechanism (not shown).

The plane table 9 and the like are integrally formed so as to be able to move forward and backward in the direction of the log 2 as shown by arrows in FIG. Plane table 9 at this time
Is detected by the stepping / plane table position encoder 16, and this detection signal is input to the CPU 17.

On the other hand, the rotation angle and the number of rotations of the spindle 1 are detected by a spindle rotation angle encoder 18 and a spindle rotation encoder 19, and these detection signals are also inputted to the CPU 17. The CPU 17 controls the fluid pressure unit 14 based on the detection signals and the like from each of these encoders, and performs a step-by-step or other reciprocating operation of the plane table 9. As described above, in the present embodiment, the fluid pressure unit 14 and the pressure
Since the movement of the plane table 9 is controlled by the PU 17, the speed of stepping can be continuously changed within a predetermined range at any time by a command from the CPU 17.

In FIG. 1, reference numeral 20 denotes an operation panel on which various operation buttons and the like are arranged, and reference numeral 21 denotes a control panel.

In the veneer race of this embodiment having the above structure, the log 2 is rotated at a predetermined rotational speed together with the spindle 1 by the main motor 3. At the same time, the CPU 17 controls the fluid pressure unit 14 to operate the pressure advance / retreat mechanism 15 with reference to detection signals from the stepping / plane table position encoder 16, the spindle rotation angle encoder 18, the spindle rotation encoder 19, and the like. And move the plane table 9 to the spindle 1
In synchronism with the rotation of (log 2), the wood is fed toward the log 2 at a predetermined speed, and a veneer having a predetermined thickness is cut from the log 2.

Further, during the step feed as described above, the "back button" provided on the operation panel 20 is pressed to move the plane table 9 backward in order to change the blade opening amount or the like. In this case, as shown in the flowchart of FIG. 2, the CPU 17 performs control as follows, and the stepping is restarted.

That is, the CPU 17 starts the process by pressing the “backward button” during the step-by-step execution (10).
0) First, the position of the plane table 9 and the rotation of the spindle 1 are detected based on the detection signal of the stepping / plane table position encoder 16 and the detection signal of the spindle rotation angle encoder 18 when the "reverse button" is pressed. The corner is stored (101), and the plane table 9 is retracted (102).

Next, the operation waits for the "synchronous forward button" provided on the operation panel 20 to be pressed, and when the "synchronous forward button" is pressed (1).
03) First, the plane table 9 stored in step 101 above
The plane table 9 is rapidly advanced to a predetermined position with reference to the position (104).

Here, as shown in FIG. 3, a predetermined position (step-feed resuming position) A at which the plane table 9 is rapidly advanced is defined as a point at which step-feeding is resumed at the same step-feed speed (step-start amount).
From the stored position of the plane table 9 (retreat start position) B to the plate thickness T
It is a position that has retreated one minute If the stepping amount after the resumption is different from the stepping amount before the interruption, a position (not shown) retracted from the retreat start position B by a positive multiple of the plate thickness T (2 to 3 times).
It is. In FIG. 3, reference numerals 40 and 41 denote veneers before cutting is interrupted and after cutting is restarted, respectively.

Thereafter, referring to the rotation angle of the spindle 1 (the outer peripheral position of the raw wood 2) stored in step 101, the timing is adjusted so that the cutting is restarted from the outer peripheral position of the raw wood 2 where the cutting was interrupted. Then, the feed of the plane table 9 is restarted (105), and the restart processing of the feed in the CPU 17 is terminated (106).

As described above, in the veneer race of the present embodiment, when the plane table 9 is retracted once during the stepping of the plane table 9 and the stepping is performed again, the plane table 9 is automatically moved to the vicinity of the position where the stepping is interrupted. The cutting can be started again from the cutting interruption outer peripheral position of the raw wood 2 by moving forward to the predetermined position.

Therefore, the operability can be improved as compared with the conventional case, and the cutting process can be restarted simply and quickly. Further, since the cutting can be started again from the cutting interruption outer peripheral position of the raw wood 2, as shown in FIG.
The length L of the portion where the cutting thickness of the veneer 40 before the cutting is interrupted and the veneer 41 after the resumption of the cutting is uneven can be suppressed very slightly, and the yield can be improved.

In the veneer race of this embodiment, the fluid pressure unit 14 and the pressurizing advance / retreat mechanism 15 are
And the plane table 9 moves forward and backward,
According to a command from the CPU 17, the stepping speed can be continuously changed within a predetermined range at any time. Therefore, if the pressure bar body 12 and the pressure bar 13 are moved by using a drive mechanism such as a fluid pressure unit and the blade amount can be changed by remote control by a CPU or the like, as shown in FIG. The cutting of one log 2 is continuously performed by automatically changing the stepping amount such as stepping 1), top stripping (stepping 2), original plate (stepping 3), and core stripping (stepping 4). be able to. This makes it possible to easily perform the processing in the direct line and to improve the yield.

In such a case, a timing signal may be generated from a fixed-length clipper provided at a stage subsequent to the veneer race, and the stepping amount may be switched based on the timing signal.

[0027]

As described above, according to the veneer lace of the present invention, operability and yield can be improved as compared with the conventional veneer lace, and it is possible to contribute to improvement in productivity.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a veneer race according to one embodiment of the present invention.

FIG. 2 is a view for explaining the operation of the veneer race of FIG. 1;

FIG. 3 is a diagram for explaining a step-feed restart position of the veneer race in FIG. 1;

FIG. 4 is a view for explaining a state of a portion where the cut thickness of the veneer is uneven before and after the cutting is interrupted.

FIG. 5 is a view for explaining a cutting step in the veneer race of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spindle 2 Log 3 Main motor 7 Knife 9 Plane table 12 Pressure bar body 13 Pressure bar 14 Fluid pressure unit 15 Pressure advance / retreat mechanism 16 Encoder for stepping / plane plane position 17 CPU 18 Encoder for spindle rotation angle 19 Encoder for spindle rotation

Continuation of front page (72) Inventor Eiji Morisaki 6-12 Oiwakecho, Hakodate City, Hokkaido Inside Uroko Manufacturing Co., Ltd. (56) References JP-A-60-25705 (JP, A) JP-A-58-158204 (JP, A) JP-A-58-188610 (JP, A) JP-A-2-111502 (JP, A) JP-A-59-133006 (JP, A) Japanese Utility Model Application Sho 61-59007 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B27L 5/02

Claims (3)

(57) [Claims] In a veneer race for cutting a log by synchronizing with rotation of a spindle for holding and rotating a log, and moving a plane table by an advance / retreat mechanism, a spindle rotation angle for outputting rotation angle information of the spindle Detecting means, plane plane position detecting means for outputting position information of the plane table, and control means for controlling the advance / retreat mechanism in synchronization with the rotation of the spindle, wherein the plane table is interrupted by stopping the stepping of the plane table. When retracted, the rotation angle information and the position information at the time of interruption are stored, and at the time of resumption of step feed, the plane table is advanced to a predetermined position based on the position information, and cutting is interrupted based on the rotation angle information. Perimeter of the log
A veneer race comprising: control means for resuming step feed at the same time as resuming cutting from a position . 2. The veneer race according to claim 1, wherein the advance / retreat mechanism has a drive source for moving the plane table by a fluid pressure, and is configured to be able to continuously change a stepping speed. 3. The veneer race according to claim 2, wherein said control means is configured to change the stepping speed based on a signal from a clipper for cutting the cut veneer.