FI99097C - Apparatus for controlling the overhead pressure roller connected to the machine tool - Google Patents

Description

99097

EQUIPMENT FOR CONTROLLING THE UPPER PRINT ROLLER IN CONNECTION WITH THE MACHINE

The present invention relates to an apparatus according to the preamble of claim 1 for controlling an overhead printing roller in connection with a machine tool.

FI patent 83847 discloses a chipper in which a beam machined on all four side surfaces is formed from two plain ones machined on two opposite side surfaces. The chipper is equipped with two chipping discs. The discs can be moved by trolls of different widths, respectively, each with its own servo device.

15 After the chipper there is a pressure roller above the conveyor, which is mounted on pivot arms which are actuated by a cylinder which can be controlled by a control unit so that the roller presses only or is detached from it. Also in front of the chipper is the in the apparatus according to the patent, a pressure roller mounted on the swing arms bearing-20.

The disadvantage of current equipment is that the upper roller always presses the force with equal force, regardless of the width alone. Especially at small widths alone, the surface pressure then becomes too high, and the sheer alone can be damaged.

The object of the present invention is to obviate the drawbacks of the prior art and to provide a new type of apparatus for controlling the upper roll 30. The characteristic features of the apparatus according to the invention are set out in detail in the appended claims.

With the apparatus according to the invention, a uniform surface pressure 35 is achieved regardless of the width of the timber. In this way, especially with small widths of timber, it remains undamaged. With large widths, on the other hand, a sufficiently large force can be achieved in terms of operation to press the timber against the conveyor.

In the following, the invention will be described in more detail by means of an example with reference to the accompanying drawing, which schematically shows from above a device according to the invention arranged in connection with a chipper alone.

The drawing shows a chipper in which a beam machined on all four sides is formed from two sheets machined on opposite sides, by further machining it with two chipping discs 2, 2 'of the chipper. The chipping discs can be moved in the transverse direction of the chipper along guides 3, 3 'to adjust the width of the chipper by a servo device (not shown) controlled by a control unit 4. In front of the chipper there is a conveyor along which only 1 enters the chipper from the side board separator.

On the feed side of the chipper, a pair of side rollers 5, 5 'is arranged to support the panel alone in the lateral direction. The rollers of a pair of rollers are arranged on different sides only. In addition, in front of the chipper there is an upper pressure roller 6, which can be mounted on pivot arms which are acted upon by a cylinder. After the chipper, a second upper pressure roller 7 is arranged, which is moved vertically by means of a vertical guide above it and a vertical printing cylinder 8 fitted to it so that, if necessary, it presses against the conveyor alone.

30

As already stated above, with the apparatus according to the invention it is possible to achieve a constant surface pressure on the surface alone, regardless of the width alone. This is achieved by controlling the cylinder 8 with an apparatus according to the invention, 99097 3 comprising a wedge 8 fixed to the second guide 3, widening evenly towards the disc 2, a roller 10 articulated therein articulated to the end of the lever arm 9 and a pressure relief valve 11. -5 with a fastening part 12 at one end to the wall 13, and is further connected in the middle by a hinge connection to the valve control stem 14. The pressure relief valve 11 is further connected to a control valve 15 which is controlled by a control unit 4.

10

The apparatus according to the invention operates as follows: When only 1 enters the chipper, the pairs of side rollers 5, 5 'and the front pressure roller 6 guide it between the chipping discs 2, 2'. When the already machined beam comes out of the chipper, the pressure roller after the chipper 15 presses 7 beams towards the conveyor. The distance between the chipping discs 2, 2 'is adjusted to the width alone by moving the guides 3, 3' in a direction transverse to the direction of travel alone. As the guide 3 above in the drawing moves, the wedge arm 9, which controls the pressure relief valve 11 by means of a guide spindle 14, also turns against the wedge 8 due to the rotating roller 20 10.

The pressure relief valve 11 controls the pressure cylinder 8 according to the width of 1 alone, so that when 1 alone is wide, the chipping discs 2, 2 'are further apart and the stem 14 is depressed inside the valve 11. In this case, the cylinder 8 guides the pressure roller 7 to press strongly against the beam. Correspondingly, in the case of the narrow play 1, the mandrel 14 is only slightly fed inside the valve 11, and the roller 7 presses against the beam with a correspondingly smaller force so that the surface pressure is equal to that of the wide case alone.

The shape of the wedge 8 should be chosen so that a constant surface pressure is achieved with the desired widths alone. In order to adjust the position 99097 4 of the wedge 8 and thus the force of the printing roll 7, adjusting screws 16 can be used, with which the wedge 8 is fastened to the guide 3.

The front pressure roller 6 can also be adjusted with corresponding equipment 5.

It will be clear to a person skilled in the art that the various embodiments of the invention are not limited exclusively to the example given above, but may vary within the scope of the 10 claims set out below.

Claims (5)

1. An apparatus for controlling an overhead press roller (7) arranged in connection with a beam (1) or a tool for machining a beam (1) or a log, which machine tool carries on the wooden sides of the wood according to its width adjustable processing means (2,2 '), which are guided by a drive device to correspond to the width of the wood product, and which pressure roller is driven in an upright direction by means of the connected cylinder (8), which cylinder is guided by a guide. arrangement (4, 15), characterized in that in order to maintain the surface pressure which the pressure roller (7) imposes on the wood product, substantially constant regardless of the width of the wood product, the device carries a measuring device (8,9) for measuring the distance between the processing organs. and a control unit (11), which, by means of the distance information, such as the grease of the measuring device, controls the pressure roller (7) so that it presses the wood product with a force which varies according to the wood product. width. 25 2. An apparatus for controlling a superimposed pressure roller (7) in connection with a beam (1) or a tool for machining a beam (1) or a log, which machine tool carries on the wooden sides of the wood according to its width adjustable processing means (2,2 ') which are coupled to wires (3,3') which drive them in the transverse direction of the tool machine, which wires are controlled by a drive device to correspond to the width of the wood product, and which pressure roller is driven in an upright direction by means of the cylinder (8) connected, which cylinder is controlled by a control device (4,15), characterized in that in order to maintain the surface pressure which the pressure roller (7) imparts to the wood product, it is substantially constant. Regardless of the width of the wood product, the device carries a lever (9) rotatable according to the position of the wedge member, arranged in the conduit (3), with a movable wedge member (9) and a cylinder (8), connected to the control device. external control means 811), whose control means (14) is connected to the lever (9) for determining the distance between the processing means such that the control unit (11) controls with the information determined by the wedge means (8), the pressure roller (7) so that it presses the wood with a force that varies according to the width of the wood. Device according to claim 2, characterized in that the wedge member (8) is connected to the conduit (3) by means of regulating means (16), such as regulating screws, for adjusting the position of the wedge member. 4. Device according to claim 2, characterized in that the control means (8) is a pressure reducing valve. Device according to claim 2, characterized in that at the end of the lever (9) the end which is on the side of the wedge member is applied a roller (10) or the like, along the wedge member, and that the other end of the lever is hinged to a fixed construction, such as a wall (13). • ·