JPS6337016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for forming a ruler on a thin veneer veneer.

However, in the process of manufacturing plywood, when the veneer veneer is being transported on a conveyor, it is necessary to set a ruler on the end face perpendicular to the transport direction in order to improve the stacking accuracy in the next process. However, in the past, a simple method was used to stop the tip of the veneer being conveyed by bringing it into direct contact with a ruler (stopper), so it was not always possible to make an appropriate correction. There were times when I couldn't get it.

In other words, as is well known, veneer veneer has remarkable anisotropy, unlike general materials, and has considerable strength in the same direction as the fibers, so even if the tip surface is There is no particular problem if the ruler is brought into contact with the fiber, but since it has almost no strength in the direction perpendicular to the fiber, if the end surface is suddenly brought into contact with the ruler, it may buckle due to inertia. This may cause damage to the vicinity of the end surface where the ruler is extended, or the buckling may return to its original state immediately after the ruler is released, resulting in a problem that the ruler's extended position collapses.

Therefore, attempts have been made to reduce the conveyance speed before the tip surface contacts the ruler to avoid damage near the end surface, but simply decelerating the speed only buffers the collision and conveyance continues. As long as it is carried, the problem arises that the end surface side that first contacted the ruler buckles as it is transported until the other end surface side contacts the ruler.
Since buckling tends to increase in direct proportion to the inclination of the tip surface, cushioning alone is almost meaningless. ) has a thickness of 0.6 to 1 mm
However, the strength in the direction perpendicular to the fibers is such that it cannot withstand transportation with the end surface restrained, so it has been virtually impossible to form a ruler using the conventional method.

The present invention provides a ruler setting method that can stably and accurately draw out rulers even when such thin veneers are conveyed in a direction perpendicular to the fibers, thereby streamlining the plywood manufacturing process. Specifically, the thin veneer is conveyed in a direction perpendicular to the fibers by two support conveyors on the left and right, and the thin veneer is transported by a veneer detector provided corresponding to each of the support conveyors. The leading end surface of the thin veneer is detected, and based on the detected signal, the drive of each supporting conveyor is cut off and the speed is decelerated individually, and before each supporting conveyor comes to a complete stop, the leading end surface of the thin veneer is This is a method of bringing out a ruler that is brought into contact with a ruler provided for each support conveyor.

According to the ruler setting method configured as described above, the drive is cut off and decelerated for each support conveyor before the tip surface contacts the ruler, so the tip surface on the side that has been decelerated is lower than the other tip surfaces. However, the conveyor is delayed in conveyance, and before it comes into contact with the ruler, the conveyor itself applies full braking that does not cause damage, and preliminary ruler placement is performed to accommodate the inclination of the tip surface. Buckling due to inertia does not occur,
Of course, this eliminates the risk of damage to the area around the edge of the ruler, or of the buckling stretching back to its original state immediately after the ruler is released, causing the ruler to collapse.
Since the side that comes into contact with the ruler completely stops conveyance, there is a risk that the end side that came into contact with the ruler first may buckle as it is being conveyed until the other end side comes into contact with the ruler. This is effective because it eliminates the problem completely and allows accurate ruler alignment to be performed stably.

Hereinafter, the present invention will be described in more detail with reference to an example of implementation illustrated in the drawings.

The embodiment illustrated in FIGS. 1 and 2 is an example of the application of the present invention in a deposition process.

In the figure, reference numeral 3 denotes a support conveyor at two locations on the left and right, consisting of pulleys 5 and 5a fitted to shafts 4 and 4a so as to freely rotate, and an endless band 6 such as a belt stretched between the pulleys 5 and 5a. Thin veneer plates 2 are individually driven by operation and carried in via a carry-in conveyor 1.
is conveyed in a direction perpendicular to the fibers.

7 has an endless band 12 such as a belt stretched between a pulley 8 pivotally supported by a swinging arm 9 that swings around a rotating shaft 10 that constantly rotates, and a pulley 11 fitted to the rotating shaft 10. The drive mechanism is comprised of two drive mechanisms, one on the left and one on the left, which are individually swung by the operation of an elevating mechanism 13 such as a fluid cylinder, and drive each of the support conveyors 3 separately.

14 is a single plate detector provided corresponding to each of the support conveyors 3;
It is detected that the end surface of the thin veneer 2 in the direction orthogonal to the fibers has arrived at a position a predetermined distance l away from the ruler 16 provided at each time, and a control signal is sent to the controller 15 that controls the operation of the lifting mechanism 13. emanate.

The ruler setting method according to the present invention is carried out using, for example, the apparatus configured as described above, and the end surface of the thin veneer 2 carried on the support conveyor 3 via the carrying-in conveyor 1 in the direction perpendicular to the fibers. However, if the second
If the veneer is tilted at an angle θ with respect to the predetermined ruler direction as shown in the figure, first the veneer detector 14 on the upper side of the figure issues a detection signal to the controller 15, and the drive mechanism on the upper side of the figure 7 in the counterclockwise direction, the drive of the support conveyor 3 on the upper side in the figure is cut off, and the thin veneer 2
When the end face in the direction orthogonal to the fibers comes into contact with the ruler 16, it stops completely.

Next, when the single plate detector 14 on the lower side of the figure issues a detection signal to the controller 15, the drive mechanism 7 on the lower side of the figure is similarly swung counterclockwise via the lifting mechanism 13. The drive of the support conveyor 3 is also cut off, and while the conveyor 3 is running at a reduced speed for a while due to inertia, when the end surface of the thin veneer 2 in the direction orthogonal to the fibers comes into contact with the ruler 16, it stops completely.

In the above order, the end face of the thin veneer is brought into contact with each ruler in the direction perpendicular to the fibers of the thin veneer, and the rulers are pulled out in sequence, but since the end face is decelerated before it comes into contact with the ruler, the decelerated side The leading end surface is conveyed later than the other leading end surfaces, and before it comes into contact with the ruler, the conveyor itself fully brakes the leading end surface without causing any damage, thereby responding to the inclination of the leading end surface (as the angle θ increases, (The difference in speed due to deceleration increases) Preliminary ruler alignment is achieved, and buckling due to inertia does not occur even if the ruler comes into contact with the ruler. Immediately after releasing the restraint, the buckle will straighten back to its original state, and there is no risk of the ruler collapsing, and the side that touches the ruler will completely stop conveyance. This is effective because there is no possibility that the end surface that first abutted against the ruler will buckle before the other end surface comes into contact with the ruler, and accurate and stable ruler placement can be performed.

In the embodiment illustrated in FIG. 3, a drive shaft 17a driven by a drive source 17 such as a motor is connected to two supporting conveyors 3 on the left and right through intermittent couplers 18 such as two left and right electromagnetic clutches. In addition, this is an example in which each intermittent coupler 18 is operated intermittently by the control member 18a based on the detection signal of the single plate detector 14, and the drive of each support conveyor 3 is cut off.
An apparatus having such a configuration can also provide the same functions and effects as those of the embodiments described above.

In addition, the processing of the thin veneer with a ruler, for example,
As illustrated in FIG. 5, it is possible to press and drop onto a stacking table 20 which can be raised and lowered by a vertically moving press bar 19, or if necessary, as illustrated in FIGS. 5a and 5b. , the ruler 16 is configured to be retractable and retractable by the actuation mechanism 21, and a one-way drive coupler (not shown) such as an overrunning clutch is interposed between the shaft 4 and the pulley 5, and the ruler 16 is moved by the actuation of the drive member 22. It is also possible to construct each support conveyor 3 so that it can run only in the direction of the arrow shown in the figure, and then continue to convey the fibers in a direction perpendicular to the fibers.
In any case, it is preferable to slow down the speed at which the tip of the thin veneer contacts the ruler as much as possible, and the distance l between the veneer detector and the ruler is experimentally set to meet this condition. is desirable.

[Brief explanation of the drawing]

The drawings are for explaining the present invention, and FIG. 1 is a side explanatory view of an apparatus used for carrying out the present invention;
Fig. 2 is a plan view of Fig. 1, Fig. 3 is a plan explanatory view of other equipment used in the implementation, Figs. 4 and 5 a and b.
is a side explanatory view for explaining the processing form of a thin veneer with a ruler. DESCRIPTION OF SYMBOLS 1... Conveyance conveyor, 2... Thin veneer, 3... Support conveyor, 7... Drive mechanism, 14... Veneer detector, 15... Controller, 16... Ruler.

Claims (1)

[Claims] 1. A thin veneer veneer is conveyed in a direction perpendicular to the fibers by two support conveyors on the left and right, and a veneer detector provided corresponding to each of the support conveyors detects the tip surface of the thin veneer veneer, Based on the detected signal, the drive of each support conveyor is cut off and each support conveyor is decelerated individually, and before each support conveyor comes to a complete stop,
A method for putting out a ruler on a thin veneer veneer, characterized in that the tip end surface of the thin veneer veneer is brought into contact with a ruler provided for each support conveyor.