JPS6227641B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for aligning the end faces of veneers in a veneer cross-cutting machine, and particularly provides a device suitable for aligning the end faces of thin veneers or fragile veneers. be.

Equipped with a forced-feed loading section and a free-running clamping conveyance path for the veneer, the side-splitting machine uses a push-feed method to match each other's end faces, ensuring that the end faces meet and producing strong horizontally-splitting veneers. However, in the conventional method, it was not possible to reduce the frictional resistance between the free-running clamping conveyance path and the veneer, so the fibers and If the veneer in the orthogonal direction is weak, the veneer, etc. at the abutting part may be damaged or folded due to the impact when the following veneer collides with the preceding veneer that is stopped at the pressure part. There was a drawback that troubles occurred and good end-face abutment was not always achieved.

This invention was developed in view of the drawback of end face abutment in conventional push-feed type veneer cross-cutting machines. With a simple configuration in which a clamping conveyance path is formed for the veneer to run freely, the frictional resistance between the veneer and the veneer becomes resistance to kinetic friction, and the frictional resistance between the veneer and the veneer during clamping and conveyance is significantly reduced. This reduces the impact between the end faces during abutment, making it possible to always achieve good end abutment even with thin or brittle veneers, and also uses rotating rollers to form waves in the direction of the fibers on the veneer. This structure makes it possible to strengthen the stiffness in the direction perpendicular to the fibers of the veneer, thereby making it possible to withstand the impact caused by a collision with an extremely thin veneer or the like.

To explain this invention with reference to an embodiment shown in the drawings, the carrying-in section 1 includes a plurality of upper endless belts 4 (three strips in the embodiment) stretched between the front and rear rotating wheels 2 and 3, the front and rear rotating wheels 5, A small width veneer A is conveyed in the conveyance direction F perpendicular to the fibers of the veneer A by the lower endless belt 7 (three in the example) stretched across the upper and lower endless belts 4, Upper and lower pressurizing bodies 8 and 9 are provided near the ends of the endless strips 7 to press the back surface of each endless band, so that forced feeding force can be applied to the veneer A at the portions of these pressurizing bodies 8 and 9. This forced feeding force is applied to the position X- near the end of each pressurizing body 8, 9.
It is designed to disappear at X.

The pressure section 10 has a plurality of upper and lower rotating rollers 11 (six rollers each in the embodiment) and a lower rotating roller 1.
Veneer A or preceding veneer B following the loading section 1 by 2
(The end faces of the veneer A are brought into contact with each other to form a continuous veneer) A freely running clamping conveyance path is formed, and these upper and lower rotating rollers 11 and 12 have their respective axes. It is arranged so as to roughly match the conveying direction F of the carrying-in section 1, and has a predetermined length in the direction of the conveying direction F (this length depends on the curing time of the adhesive interposed on the end surface during horizontal splicing, and the thickness of the veneer). (Set as appropriate depending on the size, etc.) The upper and lower rotating rollers 11 and 12 are rotated by a drive mechanism 13 such as a motor via their respective shafts 14 and 15 or via a rotating body that contacts the roller surface. This rotation is performed constantly or only when the veneer A is pushing the preceding veneer B. If the veneer A is rotated only when it is being pushed, for example, the veneer detector 16 is installed at the loading section 1, and the detection signals of the front and rear ends of the veneer A by the veneer detector 16 are sent to the drive mechanism, respectively. Do it as you tell 13. For example, as shown in FIGS. 2 and 3, the rotation directions of the upper and lower rotating rollers 11 and 12 are set so that the rotation directions of the left and right rollers are opposite to each other, so that the veneer A or the preceding veneer B is It is desirable to avoid misalignment in the direction, and the upper and lower rotating rollers 1
1 and 12 may or may not be disposed vertically opposite to each other as in the embodiment, as long as a clamping and conveying path for free running of the veneer can be formed.

To explain how to bring the end faces of the veneers into contact with each other, the veneer A, which is conveyed by the carrying-in section 1 in a direction perpendicular to its fibers, enters the pressure section 10 from the forced feeding section, and its The rear end stops near position X-X where the forced feeding force disappears, and the next veneer A
collides with the preceding veneer A, which is stopped at this pressure section 10, and their end faces collide with each other, and while being pushed forward, the end face moves to the position X- where the forced feeding force disappears.
Stop near X. By repeating this process, the preceding veneer B is formed in the pressure section 10, with the end faces abutting each other.
In this case, the pressure section 10 is the upper and lower rotating roller 1
1 and 12 form a free-running clamping and conveying path, and the rotating rollers 11 and 12 are rotating during rear collision and pushing forward, so that friction between the veneer A or the preceding veneer B is reduced. Resistance is the resistance of kinetic friction, and the frictional resistance is extremely small. Therefore, when veneer A collides with the preceding veneer B or is pushed forward, the leading veneer B moves smoothly with a small force, and the rear collision occurs. The impact is extremely small and no trouble occurs in the clamping and conveying path, and even thin veneers or brittle veneers with weak stiffness in the direction perpendicular to the fibers will not be damaged or folded when being rear-ended or pushed. Good end-face abutment is achieved without any occurrence.

In the figure, the gluing device 17 applies an adhesive such as hot melt to the front end surface of the veneer A transported by the carry-in section 1, and when it collides with the preceding veneer B, there is no adhesive between the end surfaces. The veneer is horizontally spliced, and the thread pasting device 18 pastes thread (or tape) in a direction perpendicular to the fibers of the preceding veneer B with an adhesive such as hot melt onto the surface of the preceding veneer B whose end faces abut each other. The cutting machine 19 has a blade 20 and a receiving blade 2.
1 cuts the preceding veneer B into a predetermined size, and the carry-out conveyor 22 transports this veneer of the predetermined size to the next process such as stacking.

The diagram shown in FIG. 3 shows the upper and lower rotating rollers 1.
This shows an embodiment of the pressure section 10 in which a freely running clamping and conveying path is formed to support the preceding veneer B in a wavy manner in the fiber direction by changing the heights of the pressure section 1 and 12. By supporting the leading veneer B in a wavy manner, the stiffness in the direction perpendicular to the fibers of the veneer B is strengthened, so that even if the veneer is extremely thin, it can withstand the impact of a rear-end collision and the pushing.

As described above, the present invention utilizes a loading section that forcibly feeds the veneer in a direction perpendicular to its fibers, and a plurality of rotating rollers on the upper and lower sides, each having an axis that roughly coincides with the conveying direction of the loading section. Since the configuration includes a pressure section that forms a free-running clamping conveyance path for the veneer following the section, the frictional resistance between the veneer and the rotating roller in the pressure section becomes resistance to kinetic friction, and the mutual end surfaces The shock caused by a collision between two panels is significantly reduced, and the movement of the veneer at the pressure section is smooth, so even thin or fragile veneers can always have good end-face collisions without any trouble. In addition, the structure in which the veneer can be supported in a wavy manner in the fiber direction by the upper and lower rotating rollers strengthens the stiffness of the veneer in the pressure area,
Enables trouble-free mating of extremely thin veneers,
Good abutment of these end faces makes it possible to cross-split thin veneers or fragile veneers by taking advantage of the push-feeding method, making a great contribution to the plywood industry.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view of FIG. 1, and FIG. 3 is a front view showing an embodiment of the pressure section. 1... Carrying-in section, 4... Upper endless band, 7... Lower endless band, 8... Upper pressure body, 9... Lower pressure body, 10...
Pressure part, 11... Upper rotating roller, 12... Lower rotating roller, A... Veneer, B... Leading veneer.

Claims (1)

[Scope of Claims] 1. A carry-in section that forcibly feeds the veneer in a direction perpendicular to its fibers, and a carry-in section formed by a plurality of upper and lower rotating rollers each having an axis that roughly coincides with the conveyance direction of the carry-in section. and a pressure section forming a clamping conveyance path for the veneer to run freely following the veneer, and the veneer forcibly fed by the carrying-in section is stopped at the pressure section near the position where the force-feeding force of the carrying-in section disappears. A veneer end face collision device that causes the veneer to collide with the preceding veneer. 2. The veneer end-face matching device according to claim 1, wherein a plurality of upper and lower rotating rollers form a free-running clamping and conveying path in which the veneer is supported in a wavy manner in the fiber direction of the veneer.