JPH11114902A - Retreating operation control method for planer table for spindleless cuttable veneer lathe and spindleless cuttable veneer lathe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the deviation of the cutting center of a log or damage to a planer table even if a finally cut log remains at the edge of a cutting blade of a veneer lathe after cutting operation of one log is completed, by controlling the retreating distance of a planer table such that a log being supplied next does not collide with the remaining log or even if a collision cannot be avoided, they are only brought into a slight contact with each other. SOLUTION: A detector 41 is provided on a planer table 11 for detecting whether or not a finally cut log remains at the edge of a cutting blade 19. In a case where it is detected that a finally cut log so remains by the detector 41, it is controlled such that the planer table 11 is retreated to a position which is spaced away a distance equal to a sum of a distance L equal to a maximum radius R of a log being supplied and a distance equal to a diameter D of the finally cut log. In a case where it is detected that no finally cut log remains, it is controlled such that the planer table is retreated to a position which is spaced away a distance L corresponding to a maximum radius of a log being supplied.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a veneer lace capable of spindleless cutting and, more particularly, to a method for controlling a retreat operation of a plane table at the end of cutting and an operation controller for the plane table. Here, a spindleless cutting-free veneer race literally has no spindle, or there is a spindle that holds a log, but the spindle is configured to rotate freely, and the driving force for rotating the log is used. Is supplied from the outer periphery of the log, and at the beginning of the cutting, the rotation driving force is supplied from both the spindle and the outer periphery of the log. It is intended to include any one that supplies a rotational driving force.

[0002]

2. Description of the Related Art Conventionally, when raw wood is sequentially supplied to a spindleless cutting free race, the plane table is once retracted in a direction away from the spindle, but the operation rate of the race is improved. For this purpose, it is necessary to make the retreat distance as small as possible. Generally, the plane table is automatically retracted by a distance corresponding to the maximum radius centered on the cutting axis of the raw wood to be supplied next.

[0003]

However, such a conventional technique has the following problems. That is, as shown in FIG. 1, the final cut log (stripped core) 2 after cutting is completed.
May bite into the cutting edge of the cutting blade 119 and remain near the cutting edge without falling downward. With the final cutting log 2 remaining, the plane table 111 is fed to the next log 1
If only the distance L corresponding to the maximum radius R about the cutting axis center is retracted, the log 1 to be supplied next hits the final log 2 or the log 1 and the outer peripheral drive roll 1
21, the cutting blade 119, the nose bar 139, or the like, the final cut log is sandwiched, the holding state of the log 1 by the holding member 167 is changed, and the cutting axis becomes out of order, or the outer peripheral drive roll is rotated. It may damage the cutting edge 121, the cutting blade 119, the nose bar 139, and the like. The reason that the final cut log 2 remains in the vicinity of the cutting edge is spindleless cutting, except that since the cutting has been completed, the rotational driving force by the outer peripheral drive roll 121 is hardly transmitted to the log. Therefore, the diameter of the final cut log can be made relatively small (for example, 40 to 45 mm), and as a result, the weight of the final cut log can be reduced, and the force of its own weight can separate the log and the veneer. The reason is that they cannot fall and cannot fall naturally. Therefore, the present invention, even if the final cut log remains near the cutting edge, does not hit until the next log to be supplied is supplied to the fixed position, or even touches to the extent that it touches slightly even if hit, It is intended to control the retreat distance of the plane table.

[0004]

According to the present invention, in order to solve the above-mentioned object, according to the first aspect of the present invention, there is provided a method for determining whether or not a finished cut log remains after cutting at the cutting edge of a cutting blade. On the basis of, if the final cutting log remains, add an arbitrary distance to the distance equivalent to the maximum radius,
The retreat operation of the plane table is controlled so as to retreat the plane table by the distance resulting from the addition. Here, the arbitrary distance may be not less than the distance equivalent to the diameter of the final cut raw wood after finishing the cutting according to the second aspect of the present invention, and may be not less than the distance enough to make a slight contact with the next raw wood to be supplied and operated. The distance is a distance that does not significantly lower the rate. By controlling the retreating operation of the plane table in this way, even if the next log is supplied, it does not hit the final cutting log remaining on the cutting edge of the cutting blade, or even if it does, it only needs to make slight contact. . In order to achieve the above object, the invention according to claim 3 is a detector that detects whether or not the final cut log that has been cut remains at the cutting edge of the cutting blade after the end of cutting, and the detector is A controller including a control for adding an arbitrary distance to the distance corresponding to the maximum radius when detecting residual cutting logs and controlling the plane table to move backward by a distance corresponding to the added result. . Further, in order to achieve the above object, according to the invention of claim 5, after the end of the cutting, a display signal transmission for displaying whether or not the final cut log that has been cut remains at the cutting edge of the cutting blade by an operation of an operator. When the display signal transmitter indicates the remaining residual cutting log, a control including adding an arbitrary distance to the distance corresponding to the maximum radius and retracting the plane table by the distance resulting from the addition is performed. It is characterized by having a vessel. Here, displaying by operation of the operator means that the operator visually confirms and displays the residual of the final cut log. The arbitrary distances in the third and fifth aspects of the present invention are the same as those in the first and second aspects of the present invention and will not be described. With this configuration, even if the next raw wood is supplied, the final raw wood remaining on the cutting edge of the cutting blade does not hit, or even if it does hit, only a slight contact is required.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 2 is a partial cross-sectional side view of a spindleless cutting free veneer race, FIG.
4 to 4 are explanatory diagrams of the operation of the veneer shown in FIG. 2, and FIG.
FIG. 3 is a control system diagram of the veneer shown in FIG. 2.

In this embodiment, at the time of starting the cutting of the raw wood, the cutting is performed while holding the raw wood with the spindle, and when an appropriate time is reached, the holding by the spindle is released and the veneer cutting is performed only from the outer periphery of the raw wood. A spindleless cutting free veneer race that supplies all the power required for the following will be described.

First, referring to FIG. 2, the entirety of a veneer race which can be cut without a spindle will be described. In the figure, 5 is a spindle for holding a log, 11 is a cutting blade 19, a nose bar 39,
A plane table provided with an outer peripheral driving roll 21 and the like, 59 and 61 are pressing rolls, and 67 is a supply member for supplying a log to be cut next. A pair of spindles 5 are provided on the left and right so as to hold the log 1, and are attached to the frame 3 so as to be able to move back and forth in the direction of the cutting axis of the log 1 by a reciprocating mechanism such as a hydraulic cylinder (not shown). Then, it is rotationally driven by a DC electric motor 7 similarly attached to the frame 3 to rotate the held log 1. Needless to say, the veneer is a veneer free of spindle-less cutting, so that the raw wood is not pinched by the spindle 5 during cutting, and the rotational driving force applied to the raw wood is only from the outer peripheral drive roll. . Reference numeral 9 denotes a rotary encoder for measuring the number of revolutions of the spindle 5.

[0008] The plane table 11 is attached to the frame 3 so as to be reciprocally movable in the directions of arrows EF. That is, the other one of the ball screws 15 having one attached to the servo motor 13 is
The plane table 11 is screwed into the plane table 11, and the plane table 11 is reciprocated by driving the servo motor 13. 1
Reference numeral 7 denotes a rotary encoder for measuring the position of the cutting edge of the cutting blade 19, which is attached to the servomotor 13.

The outer peripheral drive roll 21 has an appropriate number (for example, 154) of rotating bodies 25 having a large number of piercing bodies 23 on the outer periphery in the axial direction of the drive shaft 27, and at appropriate intervals (for example, 17.
5 mm). The drive shaft 27 is rotatably supported at the swing ends of the two swing arms 29, and rotates at a constant speed by driving a three-phase induction motor 33 provided on a nose bar mount 31 described later. . The base end of the swing arm 29 is
The swing arm 29 is centered on the shaft 35 by an advancing / retreating operation of a cylinder 37 having a tip of a piston rod attached to the drive shaft 27. To rotate.

Reference numeral 39 denotes a strip-shaped nose bar piece for pressing a log in the vicinity of the cutting edge of the cutting blade 19. Of the rotating bodies 25 constituting the outer peripheral driving roll 21, two adjacent rotating bodies 25, 25 are formed. It is arranged in a space, and its upper end is attached to a nose bar attachment base 31. By arranging a plurality of the nose bars 39 for each space of each rotating body, a member having a function as one so-called nose bar is formed. The nose bar 31 is integrally formed with the plane table 11 and moves together with the plane table 11 in the EF direction.

Whether or not the finished cut log remains on the tip of the cutting blade 19 via the support arm 43 on the nose bar mounting base 31 (whether or not the last cut log is present). ) Is attached. The detector may be any type of member, such as a photoelectric switch, a limit switch, a proximity switch, or the like, as long as it can detect the presence or absence of the final cut log. In addition, the nose bar mount 3
Instead of 1, it may be any part such as the frame 3, the holding member 67, or the like.

On the other side of the plane table 11 with the spindle 5 interposed therebetween, pressing rolls 59 and 61 for pressing a log are mounted on a supporting table 51 for pressing rolls.
The support table 51 for the pressing roll has an arrow G-
It is mounted so as to be able to reciprocate in the H direction, one of which is screwed with the other of the ball screws 55 connected to the servo motor 53, and reciprocates by the rotational driving of the servo motor 53. Reference numeral 57 denotes a rotary encoder for measuring the positions of the pressing rolls 59 and 61, which is attached to the servomotor 53. Reference numeral 63 denotes a rotary encoder for measuring the number of rotations of the pressing roll 59, which is attached to the pressing roll 59.

A supply member 67 for supplying the log 1 to be cut next is arranged above the pressing roll 59. The supply member 67 supplies the log while correcting the holding position or the supply position so that the cutting axis A of the log calculated in the previous process and the axis of the spindle match. However, the detailed configuration and operation are omitted because they are not directly related to the present invention. Here, in order to simply supply the next log to be cut, it is provided to supply the sandwiched log 1 to the spindle 5. Just explain that there is.

The rotary encoders 9, 1
7, 57, 63 and the signal from the detector 41, furthermore, based on the thickness of the veneer, the diameter D of the final cut log and the maximum radius R about the cutting axis A of the next cut log, etc. A controller for automatically controlling the operation of the DC electric motor 7, the servo motors 13, 53, and the like is provided as described later, and they are associated as shown in FIG. The operation of each of the motors can be manually controlled at any time.

Next, the operation of the embodiment will be described with reference to FIGS. The thickness of the single plate and the diameter D of the final cut log are manually input to the controller in advance, and the three-phase induction electric motor 33 rotates at the same time as the operation. Depending on the material condition of the raw wood, there is also a case where the cutting is terminated by manual control at a diameter larger than the diameter D of the final cut raw wood. Is stored.

First, in the initial state shown in FIG. 2, the log 1 for which the cutting axis A has been calculated in the previous step is sandwiched by the supply member 67, and is held obliquely above the spindle 5. Here, R is the maximum radius centered on the cutting axis A obtained by the above calculation, and a signal corresponding to the maximum radius R is sent to the controller every time the above calculation is performed. Plane table 11
Arrow F until the cutting edge of the cutting blade 19 of the plane table 11 is separated from the axis of the spindle 5 by a distance L corresponding to the maximum radius R.
Back in the direction. In addition, the support table 51 for the pressing roll
Press roll 59 when supplying log 1 to spindle 5
Is retracted in the direction of arrow G to a position where does not cause an obstacle.

The supply member 6 is controlled by an output signal from the controller.
7 is moved in the direction of the arrow P so that the cutting axis A of the log 1 coincides with the axis of the spindle 5 (two-dot chain line in FIG. 2). Then, the spindle 5 is advanced by manual control or automatic control to hold the log 1 and release the holding of the log 1 by the supply member 67, and return the holding member 67 to the standby position (the position indicated by the solid line).

Subsequently, the DC electric motor 7 is operated by the output signal from the controller, and the spindle 5 is rotated.
At the same time, the servomotor 13 is operated by the output signal to move the plane table 11 forward in the direction of arrow E. The controller controls the signal from the rotary encoder 17 and the outer peripheral drive roll 2.
The number of rotations of the spindle 5 is sequentially determined based on one rotation speed (constant speed), and the spindle 5 is rotated by an output signal. At the same time, the rotation of the spindle 5 is determined based on a signal from the rotary encoder 9, and the thickness of a single plate (for example, 3.6) that is cut every rotation of the spindle 5 is determined based on an output signal.
mm), the plane table 11 is advanced in the direction of arrow E.

When the outer periphery of the log 1 becomes substantially cylindrical by further cutting, the servo motor 53 is automatically controlled.
The controller determines the log diameter based on a signal from the rotary encoder 17, activates the servomotor 53 based on the output signal, and moves the pressing roll support base 51 stepwise in the arrow H direction. That is, the pressing rolls 59 and 61 are moved at a high speed to the vicinity of the outer circumference of the log, and subsequently at a middle speed to a position in contact with the outer circumference of the log which is a position corresponding to the diameter of the log. Further, at the same time as the end of the movement, the controller operates the servo motor 53 by the output signal to advance the pressing roll support base 51 by a predetermined distance in the direction of the rotation center of the log. That is, the support base 51 for the pressing roll is moved in the direction of the rotation center of the raw wood so that the distance from the axis of the pressing rolls 59, 61 to the rotation center of the raw wood 1 is reduced by the thickness of the single plate every rotation of the spindle 5. To move forward.

Subsequently, the controller releases the raw wood held by the spindle 5 in accordance with the output signal, and causes the raw wood to be held by the three members of the outer peripheral drive roll 21 and the pressing rolls 59 and 61 as shown in FIG. Prepare for so-called spindleless cutting. At the same time, based on signals from the rotary encoders 17 and 63, the current log diameter and the number of rotations of the log are determined. Based on the output signal, the plane table 11 and the pressing roll support table 51 are advanced in the same manner as described above, and spindleless. Start cutting.

When spindle-less cutting progresses and the log becomes the diameter D of the final cut log, the forward movement of the plane table 11 and the pressing roll support table 51 is stopped by an output signal from the controller, and spindle-less cutting is performed. To end.

The servo motors 13 and 53 are operated by the output signal from the controller, and the plane table 11 and the pressing roll support table 51 are moved backward at a high speed in a direction opposite to the above-mentioned forward movement. The plane table 11 and the cutting edge of the cutting blade 19 are the spindle 5
When the controller determines the position by a signal from the rotary encoder 17, the servo motor 13 is moved backward by the output signal. Bring braking. Similarly, the pressing roll support base 51 is retracted to a position where the pressing roll 59 does not hinder the supply of the next log 1 to the spindle 5.
7, the servo motor 53 is braked by the output signal.

If the final cut log does not fall from the cutting edge of the cutting blade 19 when the plane table 11 is retracted, that is, if the final cut log remains, a signal indicating the presence of the final cut log is sent from the detector 41 to the controller. Sent to Then, the plane table 11 is retreated to a position separated by a distance (see FIG. 4) obtained by adding a distance L corresponding to the maximum radius R of the next supplied raw wood and a distance D corresponding to the diameter D of the final cut raw wood that has been further cut. . More specifically, the plane table 11 is moved backward by an output signal of a controller based on a signal corresponding to the maximum radius R and a signal corresponding to the diameter D of the final cutting log. Then, the plane table 11 is retracted to a position separated by the added distance, and when the controller determines the position by a signal from the rotary encoder 17, the servo motor 13 is braked by the output signal, Waiting for the supply of raw wood to be cut. Of course, the detector 4
When 1 does not detect the residual of the final cut log, it goes without saying that the distance corresponding to the diameter D of the final cut log is not added. By repeating the above, new logs are sequentially supplied, and spindleless cutting is performed. The remaining final logs are dropped by rotation of the newly supplied logs.

The present embodiment is a veneer of the type in which the rotational force of the raw wood is supplied from the spindle at the beginning of cutting, but the driving force is completely eliminated during the cutting. The veneer can also be carried out in the same manner as described above. In this case, the log is held by the three members of the outer peripheral drive roll 21 and the pressing rolls 59 and 61 from the beginning of cutting. Is read as "the direction away from the center of rotation for cutting."

In the above embodiment, when the final cut log remains, the distance corresponding to the diameter D of the final cut log is added. It is also possible to add a distance that is greater than the distance that makes slight contact with the log and that does not significantly reduce the operating rate of the veneer.

Although the detector 41 directly detects whether or not the final cut log remains, a display signal transmitter is provided in an operation box or the like, and an operator visually checks the remaining final cut log. A display signal may be transmitted by operating the display signal transmitter, and an arbitrary distance may be added by the signal.

[0027]

As described above, according to the present invention, in a veneer which can be cut without a spindle, when the plane table is retracted at the end of the cutting, when the finished cut log remains on the cutting edge of the cutting blade. In addition, add any distance to the distance corresponding to the maximum radius centered on the cutting axis of the raw wood to be supplied next, and move the plane table backward by the distance of the added result, so supply the next raw wood However, the raw wood does not hit the final cutting log remaining on the cutting edge of the cutting blade, or even if it hits it, it only touches slightly, the cutting axis of the raw wood goes wrong, the outer circumference of the plane table The drive roll and the cutting blade are not damaged.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a conventional device.

FIG. 2 is a partial cross-sectional side view.

FIG. 3 is an operation explanatory view.

FIG. 4 is an operation explanatory view.

FIG. 5 is a control system diagram.

[Explanation of symbols]

 1 ··· Log 5 · · · · spindle 11 · · · · plane table 19 · · · cutting blade 41 · · · · detector

Claims (6)

[Claims] 1. A method for controlling a retreat operation of a plane table at the end of cutting of a spindleless cutting veneer race, wherein the plane table is moved in a direction away from the spindle and around a cutting axis of a raw wood to be supplied next. When automatically retracting by a distance equivalent to the radius, based on whether or not the final cut log that has been cut remains at the cutting edge of the cutting blade, if the final cut log remains, the maximum A method for controlling the retraction operation of a plane table in a spindleless cutting-free veneer race, in which an arbitrary distance is added to a distance corresponding to a radius and the plane table is retracted by a distance resulting from the addition. 2. The method according to claim 1, wherein the distance to be added is equal to or greater than a distance corresponding to the diameter of the final cut log after finishing the cutting. 3. A retreating mechanism for automatically retreating the plane table at the end of cutting by a distance corresponding to the maximum radius in the direction away from the spindle and about the cutting axis of the next supplied raw wood. A spindleless cutting-free veneer race, having a detector for detecting whether or not the final cut log that has been cut remains at the cutting edge after the end of cutting; and And a controller including a control for adding an arbitrary distance to the distance corresponding to the maximum radius when detecting, and controlling the plane table to retract by the distance obtained as a result of the addition. 4. The spindleless free-cutting veneer race according to claim 3, wherein the distance to be added is equal to or greater than the distance corresponding to the diameter of the final cut raw wood after cutting. 5. A retreat operation mechanism for automatically retreating a plane table at a distance corresponding to a maximum radius in a direction away from a spindle and at the center of a cutting axis of a raw wood to be supplied at the end of cutting. A spindle-less cutting free veneer race, comprising: a display signal transmitter for displaying, by an operator's operation, whether or not the final cut log that has been cut remains at the cutting edge after cutting, and the display signal. A controller including a control for adding an arbitrary distance to the distance corresponding to the maximum radius when the transmitter indicates the residual of the final cut log, and for controlling the plane table to retract by the distance resulting from the addition. Veneer lace that can be cut freely. 6. The spindleless cutting free veneer race according to claim 5, wherein the distance to be added is equal to or greater than the distance corresponding to the diameter of the final cut raw wood after cutting.