FI95882C - Device for suspension of the supporting rollers located above the core structure - Google Patents

Description

95882

EQUIPMENT FOR HANGING OVER SUPPORT ROLLERS

The present invention relates to an apparatus according to the preamble of claim 1 for hanging overhead support rollers in a sawmill.

After sawing the side boards, the core material is moved by chain conveyors. In order to support the core goods on the conveyor, overhead support roller solutions are known, in which the roller 10 is suspended by means of a fork-like suspension member on the frame body above. The movement of the support roller can now be controlled by means of a cylinder between the fork and the frame beam.

15 The dimensions of the core material can vary according to the size variation of the sawmill alone and the dimensions of the desired end product. The disadvantage of current equipment is that the upper support equipment does not take into account the variations in the height of the core material in any way. The use of a cylinder also often causes 20 hard blows to the leading edge of the heart goods, thus causing unnecessary knocks to the heart goods.

The object of the present invention is to obviate the drawbacks of the prior art and to provide an apparatus which is better able to take into account the variations in the heights of the heart goods than the apparatus currently in use.

Characteristic features of the apparatus according to the invention are set out in the appended claims.

30

The solution according to the invention provides a "self-learning" height solution for the core material, which automatically adjusts the upper support rollers to the correct height against the heart product, and thanks to the suspension suspension suspension, the core material 35 is no longer subjected to as much impact as before.

In the following, the invention will be described in more detail by way of example with reference to the accompanying drawings, in which 2 95882

Figures 1 and 2 show the conveyor and the upper support rollers.

Figures 3 show the apparatus according to the invention from the side.

5

Figures 1 and 2 show how only the core goods 2 and the side boards 3 are sawn with a circular saw 1, which are separated from the core goods after sawing. After sawing, the core material 2 is supported on the side by support rollers 4 and transported 10 by a chain conveyor 5.

The conveyor has frame beams 6 above. The core goods 2 are supported from above by upper support rollers 7 attached to the upper beam 6. The side boards 3 are transported out 15 by a roller conveyor 8.

The upper support roll 7 is suspended from the upper beam 6 by a suspension structure consisting of a sloping L-shaped suspension angle 9 (the angle between the arms is somewhat over 90 °), to the shaft 10 at the horizontal end of which is rolled. from the triangular flanges 13 fixed at an angle to the shaft 12 (Fig. 3) at the bottom of the beam 6.

Limit switches 14a and 14b are provided on both sides of the vertical upper end 9a (shown in broken lines) of the suspension part 9 when viewed from the side. On the other hand, a rubber sleeve 15 is arranged in the horizontal lower part of the support arm, on which the lower part of the suspension part 9 rests. This causes the support roller 9 to move freely upwards, and in addition its movement against the support is sprung.

The vertical upper end of the support arm 11 is articulated to a sleeve 16, 35 with an internal thread, which is moved in the longitudinal direction of the conveyor by a helical drive shaft 17 which is rotated by a drive mechanism with a control unit. The limit switches are fixed to move with the sleeve 16 and are also connected to the control unit.

With the suspension according to the invention, the lower position of the support rollers 7 can be adjusted with the core goods at the support rollers so that the support rollers 7 are always pressed against the core goods and at the correct height. As the core 2 enters the support rollers 7 (approach and departure can be monitored by optical switches not shown here), the height adjustment of the roll 7 in the down position depends on the height of the core 2 and the height of the roll 7 before the arrival of the core.

15 When the roll 7 hangs too low before the entry of the core goods and rises when the core goods arrive, the vertical part of the support arm of the suspension part 9 presses against the left limit switch 14b according to Fig. 3. The limit switch 14b then instructs the drive to rotate the drive shaft 17 so that the sleeve 16 moves to the left. Due to the movement of the sleeve 16, the roller 7 rises to the right height so that it presses against the core material, after which the control of the limit switch ceases.

Correspondingly, when the roll of the roll 7 is too high before the arrival of the core goods 25, the right-hand limit switch 14a instructs the drive mechanism to lower the roll 7 to the correct height.

In Fig. 1, the cross-section of the rollers 7 is in the form of a cone cut only from the contact surface, but rollers 18 with a uniform surface can also be used between the cone rollers 7. The lower position adjustment is only required in some of the support rollers, so that the lower position of the others can be adjusted accordingly.

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 claims set out below.

Claims (4)

Apparatus for suspending the support rollers (7,18) located above the core structure (2) in a sawmill, which device comprises a suspension structure (9,11), the supported rollers are hingedly suspended in the supporting structure (6) which is present above it; with which the lower position of the support rollers (7,18) is adjusted to correspond to the height of the core (2) in the device, characterized in that in the device at least one suspension structure (9,11) is fixed above the guided position (12) in a drive shaft (17), which moves the upper part of the suspension structure so that the position of the supporting roller (7) changes in height, and at least one suspension structure (9,11) is provided with limit switches (14a, 14b) or similar sensors as when the core structure is located. in the case of at least one supporting roller (7), the drive shaft (17) controls such that it lifts or lowers the roller (7,18) to a height suitable for the core, thereby supporting it. Device according to claim 1, characterized in that the suspension structure consists of two substantially L-shaped separate parts, a suspension part (9) in which the upper part of the limit switches (14a, 14b) or the like are placed and thus the roller (7). ) is suspended in the overlying support structure (6,13), and a support part (11) whose upper part with a connecting part (16) is hingedly attached to the drive shaft (17), which both parts are hinged in the same hinge member (12). 7 95882 Device according to claim 1, characterized in that the horizontal portion of the carrier part (11) is provided with an elastic connecting part (15) in which the suspension part (9) is fixed. 4. Apparatus according to claim 1, characterized in that the connecting part (16) is a sleeve-shaped and internal threaded part enclosing the external shaft provided and driven by a drive mechanism.