JPS62162502A - Log supply method in veneer lathe - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial Application Field" The present invention relates to a method for rapidly loading raw wood after centering between the gripping claws of a veneer lace.

``Prior art'' Generally, the log that is supplied to the veneer lace is turned in a centering device in the previous step, where the axis that will be the turning center is appropriately determined, and after centering, the log is placed on top of the veneer lace. A transport machine that reciprocates in parallel on a pair of rails,
Alternatively, the shaft core portion is loaded between the gripping pawls while being supported by a conveying pawl such as a swing arm that swings at a constant angle using the pivot portion as a fulcrum.

During this loading, the veneer lace plane head moves from the cutting completion position to a position where it does not collide with the outer circumferential surface of the raw wood to be loaded, that is, a position where it does not interfere with the maximum radius when the shaft core is gripped between the gripping claws. , it is necessary to evacuate.

In order to control this retraction amount to an appropriate position, the applicant has
Japanese Patent Publication No. 58-54003, entitled ``Movement control device for planer stand,'' provides a method for measuring the diameter of logs at arbitrary points and determining the amount of movement of the planer stand based on the maximum value among the measured values. We aimed to improve the operating rate in seed work.

After centering, the log waits at an intermediate position between the veneer race and the centering device until rotational cutting of the log is completed, and when the plane head starts retracting based on the maximum value among the measured values, It started moving forward from the intermediate standby position and was gripped by the gripping claws without interfering with the planer stand in the retracted position, reducing the loading time of logs and achieving the intended purpose.

"Problem to be Solved by the Invention" Normally, the centering position and the intermediate standby position, and the distance between this standby position and the veneer race, are set so that the logs do not interfere with each other, and are adjusted to the expected maximum diameter of the logs. It is set with a slight margin in mind. However, there is a difference between the distance at which the plane stand retreats to the proper position and the distance at which the log after centering is loaded, so even if the plane stand retreats to the proper position, the log after centering is still being fed to the veneer lace. It is still on its way, so the cutting start time will be delayed.

"Means for Solving the Problems" In view of the above, the present invention provides a method for supporting the log after centering by conveying claws at any position between the centering position and the veneer laces, while at least grasping claws of the veneer laces. Just before the end of cutting the raw wood gripped by the machine, move the planer head forward to a position facing the outer circumferential surface of the raw material at a fixed interval, and immediately after finishing cutting the raw material, move the planer stand to a position corresponding to the diameter of the raw material after centering. By retracting the centering log and loading it between the gripping claws of the veneer race, the operating rate is further improved from the time the planer head is retracted to the appropriate position until the time when the centering log starts cutting. It is something that makes you

"Example" Examples of the method of the present invention will be described below based on the accompanying drawings.

Although the attached drawings do not show an example of a device for detecting the log diameter, normally in plywood factories, as described above, the logs supplied to the veneer lace are aligned with the turning center by a centering device. When determining the axis, the diameter of the log can be calculated incidentally.

In addition, this centering device has the tendency for the diameter of ordinary logs to gradually become thinner from the root to the top, so from the viewpoint that the maximum diameter exists in one of the rainwater areas of the log after cutting, Measure the long and short axes of the rainwater end face of the log, calculate based on concentric circles projected from a projector onto the rainwater end face of the log, measure the diameter part located near the rainwater end face of the log, or The method calculates the maximum inscribed circle of multiple cross-sections in the longitudinal direction, taking into account bending and deformation in the longitudinal direction of the log, and calculates the maximum right cylinder included in these maximum inscribed circles. .

Between this centering device (not shown) and the veneer lace 1,
A pivot part that supports a swinging arm that can swing at a certain angle, or
As shown in Figs. 1 and 2, a pair of rails 2 are laid on the upper part at arbitrary left and right intervals, and from this rail 2,
A conveying machine 4 is suspended via wheels 3 arranged at its four corners, and this conveying machine 4 is equipped with conveying claws 6 on both sides in the conveying direction for gripping the log 5 after centering.

Further, the amount of movement of the conveyor 4 is determined by a conveyor position detector 7 consisting of a Magnescale or an encoder such as the illustrated example, to the backward limit position on the centering device, or
It is detected by the amount of pulses sequentially emitted from a standby position 8 set approximately midway between the centering device and the veneer race 1 as it is transported.

On the other hand, the raw wood 5 that has already been transported to the veneer race 1 in the transport I14 is gripped with its axis aligned with the center of the gripping claw 9, and the planer stand transmission device 10 causes the feed shaft 11 to be fed step by step. A blade 13 of a plane stand 12 screwed onto a shaft 11
The veneer veneer 14 is cut by. As described above, this step distance is constantly detected based on the amount of pulses transmitted from the machine head position detector 15, which is comprised of a magnescale, an encoder, and the like.

An embodiment of the present invention is schematically shown in the block diagram of FIG. 6, and its operation will be explained next based on this block diagram and the operation explanatory diagrams of FIGS. 3 to 5. .

First, the maximum diameter of the log 5 is detected by the log maximum diameter detector 16 arranged in association with the centering device, and this detected value is output to the transport machine movement amount calculation device 17, and
It is temporarily stored in the storage device 18.

This conveyance machine movement amount calculating device 17 includes the log conveyance distance from the standby position 8 to the center of the gripping claw 9, the position of the conveyance 41!4 detected by the conveyance machine position detector 7, and the planer stand position detector 15. The position of the planer stand 12 detected by the method is manually determined.

If it is the initial operation, the log 5 is not yet gripped between the gripping claws 9 of the veneer lace 1, so an OFF signal is input from the gripping claw tightening signal 19. In this case, the amount of movement of the conveyor 4 is a log conveyance pressure of 1titt, and the log 5 is conveyed between the gripping claws 9.

On the other hand, the maximum diameter of the log 5 is output from the storage device 18 to the planer stand movement amount calculation device 20, and in this planer stand movement amount calculation device 20, the movement amount of the planer stand 12 is calculated by comparing it with the output from the planer stand position detector 15. The calculation result is output to the planer stand control device 21 to drive the motor 22. Therefore, the planer stand I2 is moved to the proper position on the feed axis 11 by the planer stand transmission device lO, and at the same time, the amount of this movement is detected by the planer stand position detector 15, and the planer stand movement amount calculation device 20
has been returned to.

Under this condition, when the log 5 is gripped and exchanged from the conveying claw 6 of the conveyor 4 to the gripping claw 9 of the veneer lace 1, the planer stand 12, which had been retracted to the proper position, is moved forward, and the veneer veneer 14 is moved away from the log 5. will be cut.

During this time, the next log 5 is centered by the centering device,
Similar to the above description, the maximum diameter is output to the conveyor movement amount calculation device I7 and the storage device 18.

This conveyance machine movement amount calculation device 17 includes a planer stand 1 in the middle of cutting.
The position No. 2, that is, the radius of the log 5 in the process of reduction, is always manually controlled, and the position of the transport machine 4 is also manually determined from the transport machine position detector 7.

Therefore, the following arithmetic expression is set in the conveyance machine movement amount calculating device 17, and the movement ff1X of the conveyance machine 4 is calculated from this arithmetic expression.

X=L-BR-to-AR In the above equation, L is the log conveyance distance from the standby position 8 to the center of the gripping claw 9.

BR is the radius of the log 5 that is being transported by the transporter 4.

K is the facing distance at which the outer circumferential surface of the log 5 being transported and the outer circumferential surface of the log 5 being cut do not interfere.

AR is the radius of 50 logs in the middle of cutting.

When the calculation result calculated from the above calculation formula is output to the transport machine control device 23 and the motor 24 is driven, the transport Ia
4 is advanced by X on the rail 2 by the conveyor transmission device 25, and moves from the position shown in FIG. 3 to the position shown in FIG. 4. At this time, this movement amount X is detected by the transport machine position detector 7 and fed back to the transport machine movement amount calculating device 17.

Therefore, the log 5 supported by the conveyor 4 has reached a position where it faces the outer peripheral surface of the log 5 that is being cut at a constant interval. Furthermore, since the radius zN at which the radius AR decreases in accordance with the amount of cutting is sequentially detected by the plane head position detector 15, the conveyor 4 is moved forward by this amount N and reaches the position shown in FIG. Become.

Next, when the cutting of the log 5 is completed and the clamping of the gripping claws 9 is released, an OFF signal is output from the gripping claw tightening signal 19 to the transport machine movement amount calculation device 17, and the storage device 18 A set signal is output.

Therefore, the maximum diameter of the raw wood 5 on the way to being transported, which was once stored in the storage device 18, is output to the planer stand movement amount calculation device 20, and similarly to the above description, the movement amount of the planer stand I2 is calculated, and the planer stand 12 is moved to the planer stand. The transmission device IO moves the log 5 on the feed shaft 11 to an appropriate position, and the log 5 is gripped and exchanged from the conveying claw 6 to the gripping claw 9.

Thereafter, by repeating the above operations, the cored log 5 is quickly loaded between the gripping claws of the veneer lace 1.

In this embodiment, the carrier position detector 7 and the planer stand position detector 15 are controlled without permission using a magnescale, an encoder, etc., but a plurality of detectors may be arranged on the rail 2 and the feed axis 11. However, it is also possible to control the signals in a step-by-step manner by organically correlating the signals of the two.Also, while the logs 5 face each other at a certain interval, the logs 5 can be moved forward at the end of cutting. However, it is also optional to advance the logs 5 from an arbitrary waiting position to a position where the logs 5 face each other at a constant interval just before the cutting of the logs 5 is finished.

"Effects" As described above, according to the present invention, the log after centering is supported by the conveying claws at any position between the centering position and the veneer race, and is held at least by the gripping claws of the veneer race. By the end of cutting the raw wood, advance it to a position facing the outer circumferential surface at a certain distance,
Immediately after cutting the log is completed, the planer stand is moved back to a position that corresponds to the diameter of the log after centering, and the centering log is loaded between the gripping claws of the veneer lace. , it is possible to further improve the operation rate until the cutting of the log after centering is started.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view showing an embodiment of the present invention;
FIG. 2 is a side view of FIG. 1, FIGS. 3 to 5 are diagrams for explaining the operation, and FIG. 6 is a block diagram showing the principle of operation of the method of the present invention. l...Plywood lace 5...Log 6...Transporting claws 9...Gripping claws 12...Planter stand patent applicant Taihei Seisakusho Co., Ltd.

Claims (1)

[Scope of Claims] 1. Near the end of cutting the raw wood held by at least the gripping claws of the veneer race while supporting the cored raw wood at any position between the centering position and the veneer race by the conveying claws. By then, advance the log to a position facing the outer circumferential surface at a certain interval, and immediately after finishing cutting the log,
A method for supplying logs in a veneer race, characterized by retracting a planer stand to a position corresponding to the diameter of the log after centering, and loading the core after centering between the gripping claws of the veneer race. 2. Until the end of cutting the log, keep the centered log facing the outer circumferential surface of the log gripped by the gripping claws at a constant interval, and adjust the cutting amount as the planer head moves forward. 2. The method for supplying logs in a veneer race according to claim 1, wherein the conveying claws steplessly follow and move forward from an arbitrary position as the diameter of the log decreases accordingly. 3. Until the end of cutting the log, keep the centered log facing the outer circumferential surface of the log gripped by the gripping claws at a constant distance, and adjust the cutting amount as the planer head moves forward. 2. The method for supplying raw wood in a veneer race according to claim 1, wherein the conveying claw is moved forward in stages from an arbitrary position as the diameter of the raw wood decreases accordingly. 4. A patent for advancing the centered log from an arbitrary waiting position to a position facing the outer circumferential surface of the log gripped by gripping claws at a constant interval, just before the end of cutting the log. A method for supplying logs for veneer lace according to claim 1.