FI103961B - Suction conveyor for veneer sheets - Google Patents

Description

103961

Suction conveyor equipment for veneer sheets

The present invention relates to a suction conveying apparatus for lifting and transporting individual veneer sheets or the like from at least one stack, the apparatus comprising a suction box arranged above the stacks, and fitted with vertical suction lifting portions for lifting sheets and seating longitudinal conveyor belts for transporting sheets.

10 There is now known overhead veneer suction conveyor equipment for use in plywood production lines, which lifts individual veneer sheets from a stack of sheets and transports to a storage site, which includes a suction box arranged above the stacks, longitudinal conveyor belts arranged to the transport height and to the suction box for transporting veneer sheets.

The disadvantage of current equipment is that the causal I. longitudinal and transverse I. transverse veneer sheets are transported to the loading site along different transport lines, because current suction conveying equipment cannot handle longitudinal veneer sheets.

I I I

The object of the present invention is to eliminate the disadvantages of the prior art and to provide a new type for the transport of veneer sheets and the like. 25 hardware. The apparatus according to the invention is characterized in that, in addition to the conveyor belts, transverse rollers are provided in the suction box, in particular for conveying longitudinal sheets.

. . An embodiment of the invention is characterized by the fact that the apparatus has • · | 1 30 lifting components specially designed to lift longitudinal and transverse sheets.

The equipment according to the invention can significantly and efficiently transport the veneer sheets from the stack to the stacking site. Because the invention is capable of transporting both longitudinal and transverse veneer sheets using the same equipment, a considerably simpler and more economical transportation system is achieved than known solutions.

2 103961

The invention will now be described in more detail by way of example with reference to the accompanying drawings, in which Figure 1 is a side view of a plywood manufacturing line having suction conveyor apparatus - B.

10

Fig. 1 is a side elevational suction conveying apparatus 1 for transporting individual veneer sheets 2 from veneer sheet stacks 4 on transport trays 3 for stacking to plywood 5 on stack 6. For transporting pallets 3 there may be several in series 15, for example 6.

The suction transport apparatus 1 according to the invention for transporting individual veneer sheets 2 has a suction box 11 mounted on the support beams 10 above the veneer sheets 4 with a length at least equal to the total length of the stacks 4 disposed according to Fig. 1 in the longitudinal direction of 11: Provides a vacuum by means of electric motor drives 12 disposed thereon, which may be, for example, 6 mounted at each transport platform 3. By means of vacuum, individual veneer sheets 2 are lifted from stacks 4 as described below. . 25 and is held at the level of the transport plane at the bottom of the suction box 11.

• · • · t * · *

The lower part of the suction box 11 is provided with longitudinal angles of rotation of the pulleys 13 rotated by electric <v # motors (not shown) at the ends of the suction box.

I t I

30, with the underside extending at the height of the bottom of the suction box. For example, the straps' may have a width of 80 mm and a distance of, for example, 500 mm. In addition to the conveyor belts, a plurality of transverse conveyor rolls 16 running over the underside of the belts 14, which are rotated by an electric motor drive (not shown), 35 are provided at the bottom of the suction box 11 and have a lower edge at the bottom of the suction box 11. The lengths of the rolls 16 are approximately the same as the width of the conveyor, for example 80 mm in diameter, and may have a distance of 250 mm between them, as shown in FIG. . The belts 14 are used in particular for the carriage of the transverse sheet and the rollers 16 in particular longitudinal sheets of the carriage 3 103 961 5 Transport devices 1 carry the veneer sheet 2, the transfer substrate 20, in which the transport belts by means of the sheet passes as shown by arrow adhesive application machine to another transfer medium 21 and from there to the height of the controllable 22 from which the sheet is transferred stacking stack 6, where barrels 24 position the sheet.

Figure 2 shows the conveyors from below, in more detail, for one stack 4. It shows longitudinal belts 14 and transverse rolls 16. The bottoms of the casing lifting members 17, 17 '(Fig. 3) used for lifting a single sheet are shown with a transverse line. In the apparatus according to the invention, the lifting members 17, 17 'are fitted on both longitudinal and 15 transverse sheets. In Fig. 2, every fourth of the rolls 16 has a lifting section 17 of almost the entire cross-sectional area between rollers and belts, for example 370 mm in length and 100 mm in width, especially for transverse sheets. Between these are lifting members 17 ', in particular for longitudinal sheets, which may have a square section 20 having a side length of, for example, 100 mm. In the longitudinal direction, adjacent lifting portions 17 'are always positioned at opposite ends in accordance with Figure 2. The remainder of the gap area consists of solid suction box bottom portions 18.

Figure 3 further shows a cross-sectional view of the bottom of the suction box 11 in section B-B. The transport plane of the veneer sheets consists of the underside of the fixed base beams 18 and the bottom of the lifting members 17, being approximately flush with the undersides of a level of transport suitable for thin, flexible and fairly pear-> v. for transporting veneer sheets without breaking the veneer sheets.

• · * 30 »· · ·

The lifting members 17 are shown in Fig. 3 in an upward position, which is a transport position, and with dashed lines in the lower position at the beginning of the lifting step. The height of the lifting members 17 may be, for example, 300 mm so that they always extend to the surface of the top veneer sheet in the upper stack 4.

• · 35 »· ·," the veneer sheets used for lifting, in the vertical direction in accordance with the double arrow driving mechanism (not shown) by means of the movable lifting elements 17 are formed cross-4 103 961

A rectangular top make-up casing 30 having a rectangular bottom 31 at the bottom and suction slots 32, 33 at its front and rear edges (with respect to the direction of travel), from which air passes into the box 30 and thence to the suction box 11. The front slot 32 has the lower edge 34 of the housing 30 being inclined in the direction of travel (arrow), as well as the lower edges 35, 36 of the rear slot 33, thereby preventing the veneer sheet from adhering to the suction portion 17 and breaking the sheet. Similarly, at the front and back edges of the fixed base beams 18 are suction slots 37, 38, the front walls of which are correspondingly bevelled. The slots 37, 38 10 together with the lifting suction members 17 ensure that the sheet remains in the transport plane during transport.

Instead of the rolls 16, the suction effect is prevented by a housing 40 which is fitted around the roll and which is closed at the top and sides. In this case, the wires 15 or the like in the veneer sheets do not wrap around the rolls 16. The lower edges of the housing 40 are bevelled in the direction of travel.

It will be apparent to one skilled in the art that various embodiments of the invention are not limited to the above example, but may vary within the scope of the following claims.

··· • · »· · • • • • • • • • • • • • • • • • • • • • • • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · • «

Claims (6)

103961 A suction conveying apparatus for lifting and transporting individual veneer sheets (2) or the like from at least one stack, comprising a suction box (11) arranged above the stacks and vertically movable lifting members (17,17 ') for lifting sheets; 10, characterized in that, in addition to the conveyor belts, transverse rollers (16) are provided in connection with the suction box, in particular for transporting the longitudinal sheets. Apparatus according to Claim 1, characterized in that the apparatus comprises lifting parts (17,17 ') specially designed for lifting longitudinal sheets and transverse sheets. Apparatus according to Claim 1, characterized in that the bottom of the lifting members (17,17 ') in the up position is substantially flush with the underside of the belts and rollers and the fixed base (18) of the suction box, forming a common transport plane with the fixed base. Apparatus according to claim 1, characterized in that the lifting parts (17) have suction slots (32,33) at the bottom and / or at the bottom. • 1 · • · • · · * · # Apparatus according to claim 1, characterized in that the bottom of the solid base (18) of the suction cup has suction slots (37,38) at the front and / or at the rear. * · 1 · '30 Apparatus according to Claim 1, characterized in that the lengths of the rolls ·: · ♦: (16) are preferably approximately the same as the width of the conveyor equipment and the distance between them such that there are a plurality of sheets ( 2) during transport. • · · «I« • · 1 »· · • · 6 103961