JPS627636Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an apparatus for converting the conveying direction of a veneer, such as a plywood board or a veneer board, into a perpendicular direction.

[Background Art] As shown in FIG. 1, a conventional conveyance direction changing device of this type places a veneer-like veneer 1 projected from a slicer, and changes the direction of the fibers of the veneer 1. A table lifter 4 for pushing up the veneer 1 upwards is provided within the width of the lower conveyor 2 which is conveyed at right angles,
An upper conveyor 3 is disposed above the table lifter 4 and runs in a direction perpendicular to the lower conveyor 2 and has a large number of through holes 5 on the belt surface.
The upper surface of the belt is brought into sliding contact with a vacuum chamber 7 having a large number of suction holes 6 on the lower surface.
As shown in FIG. 2a, the belt of the lower conveyor 2 is also provided with through holes 8, and by sucking from the lower surface of the belt with a vacuum chamber 9, it is possible to prevent the displacement of the thin and light veneer 1. Prevents angular deviation.

However, in the above configuration, the lower conveyor 2
When transferring the veneer 1 from to the upper conveyor 3,
There was a problem in that the veneer 1 was attracted to the upper conveyor 3 in a relaxed state perpendicular to the fiber direction, and was likely to wrinkle or crack.

As a countermeasure to this problem, the present inventors tried a table lifter 4 as shown in FIG. Both ends of an elastic support plate 10 formed by applying a non-slip rubber lining to a thin steel plate are supported on the upper surface of the table lifter 4 by rotatable arms 11, and this elastic support plate 10 is attached to a tension spring 12. The table lifter 4 is bent and deformed into a semicylindrical shape, and its operation is as shown in FIG. The central part of c contacts the upper conveyor 3, and then c
As shown in the figure, both sides of the veneer 1 are transferred to the upper conveyor 3.
It is something that is attracted to. According to this method, even if there is slack in the veneer 1, the slack gradually moves from the center to the side edges and disappears, and the veneer 1 is attracted to the upper conveyor 3 in a flat state.

However, even with the above configuration, especially in the case of a veneer whose side edges tend to curl, such as a thin veneer,
Similarly to the conventional example shown in FIG. 6, there is no function to correct the curled portion A of the side edge, and as shown in FIG. There was a problem in that the curled part A was likely to be cracked due to being caught between the two parts and bent.

[Purpose of the invention] This invention was devised in view of the above-mentioned problems, and even when conveying veneers whose side edges tend to curl, such as thin veneers, the upper and lower conveyors do not move when changing direction. It is an object of the present invention to provide a conveyance direction changing device of this type that does not cause cracks due to curled portions being sandwiched therebetween.

[Disclosure of the invention] The veneer conveyance direction changing device according to the present invention includes a lower conveyor 2 on which a veneer 1 such as a plywood board or a veneer board is placed and conveyed at right angles to the fiber direction of the veneer 1.
A table lifter 4 for pushing the veneer 1 upward is provided within the width of the table lifter 4, and an upper conveyor 3 that runs in a direction perpendicular to the lower conveyor 2 and has a large number of through holes 5 on the belt surface is installed above the table lifter 4. By arranging
The upper surface of the belt of the upper conveyor 3 is brought into sliding contact with a vacuum chamber 7 having a large number of suction holes 6 on the lower surface, and the center portion of the upper surface of the table lifter 4 is constituted by a vacuum chamber 13 having suction holes 12 on the upper surface. In addition, there are many suction holes 14 on the circumferential surface on both sides of the top surface.
A vacuum roll 15 is provided, and both vacuum rolls 15 are rotated in a direction to stretch the side edge of the veneer 1 outward. The feature is that the curled portion of the side edge of the plate is corrected.

[Embodiment] FIG. 4 shows the table lifter 4 of the device of the present invention, and the structure of the upper and lower conveyors 2 and 3 is the same as that of the conventional example shown in FIG. 1, so a description thereof will be omitted.

In the figure, the central part of the upper surface of the table lifter 4 is composed of a vacuum chamber 13 having suction holes 12 on the upper surface, and the upper surface of the table lifter 4 has a vacuum chamber 13 having a large number of suction holes 14 on the circumferential surface on both sides of the upper surface. Rolls 15 are provided and each is biased upwardly by a spring 16, and both vacuum rolls 15 further stretch the side edges of the veneer 1 outwardly, as shown in FIG. It is rotated in the direction.

Therefore, when the table lifter 4 is in the lowered state, both vacuum rolls 15 are moved by the spring 1.
6 protrudes slightly from the upper surface of the central vacuum chamber 13, and when the table lifter 4 is raised, the veneer 1 is attracted to the upper conveyor 3.
Both vacuum rolls 15 come into elastic contact with the side edges of the
The curled portion formed on the side edge of the veneer 1 is corrected by stretching it out while suctioning, and the vacuum chamber 13 in the center absorbs the tension of the veneer 1 being pulled by the vacuum roll 15. This prevents it from shifting to one side.

[Effects of the invention] As described above, the present invention provides a table lifter within the width of the lower conveyor that conveys the veneer perpendicular to the fiber direction, and above the table lifter, the lower conveyor runs in the direction perpendicular to the fiber direction. In a veneer conveyance direction changing device equipped with an upper conveyor that suctions and conveys the plate, the central part of the upper surface of the table lifter is composed of a vacuum chamber having suction holes on the upper surface, and a large number of A vacuum roll having suction holes is provided, and both vacuum rolls are rotated in a direction that stretches the side edge of the veneer outward.
Even when transporting thin veneers whose side edges tend to curl, the direction can be changed while correcting curls. This has the effect that there is no risk of cracking due to being caught in the conveyor.

[Brief explanation of the drawing]

Fig. 1 shows a conventional veneer conveyance direction changing device, in which a is a plan view, b is a front sectional view, and Fig. 2 is another conventional example, in which a is a front sectional view;
b is a front view of the main part, FIGS. 3a, b, and c are explanatory diagrams of the same as above, FIG. 4 is a front view of the main part showing an embodiment of the present invention, and FIG. Figure 6a,
b is an explanatory diagram of the operation of the conventional example in Fig. 1, in which 1 is a single plate, 2 is a lower conveyor, 3 is an upper conveyor, 4 is a table lifter, 5 is a through hole, 6 is a suction hole, and 7 is a vacuum 8 is a through hole, 9 is a vacuum chamber, 10 is an elastic receiving plate, 11 is an arm, 12 is a tension spring, 13 is a vacuum chamber, 14 is a suction hole, 15 is a vacuum roll, 16 is a It's a spring.

Claims (1)

[Scope of utility model registration request] A table lifter that pushes up the veneer is installed within the width of the lower conveyor, which carries veneers such as plywood and veneer at right angles to the fiber direction of the veneer, and the lower conveyor is placed above the table lifter. An upper conveyor that runs in a direction perpendicular to the belt surface and has a large number of through holes on its belt surface is disposed, and the upper surface of the belt of the upper conveyor is brought into sliding contact with a vacuum chamber that has a large number of suction holes on the lower surface. The central part of the upper surface of the lifter is composed of a vacuum chamber having suction holes on the upper surface, and vacuum rolls having a large number of suction holes on the circumferential surface are provided on both sides of the upper surface, and both vacuum rolls are connected to the side edges of the veneer. A device for changing the conveyance direction of a veneer by rotating it in a direction that stretches the veneer outward.