SE509744C2 - Lathes for sawmill - Google Patents

Abstract

Stacker for elongate pieces of wood 8, having at least one driver 2, which can move along a conveying section 5, for conveying the pieces of wood 8, which are supplied in the longitudinal direction, in stacked form in a direction which is transverse with respect to the longitudinal extent of the pieces of wood 8, to a fall plate 6, downstream of which there is a conveyor 7 for the pieces of wood 8, which have been split into individual pieces by sliding down the fall plate 6, a retaining holder 10, which can be placed onto the front piece of wood 8, as seen in the conveying direction, being provided in the region of the conveying section 5.

Description

Fig. 1 shows the initial position with a stationary carrier and with a carrier 2 in the feed position for the center pieces 8, which are fed across the direction of movement of the transport chain 3, i.e. perpendicular to the plane of the paper. The center pieces slide on the support member 5 up to a stop (not shown in Fig. 2). Mounted on a bracket 9 there is a retaining member 10 sloping slightly downwards in the feed direction, which in a suitable manner, indicated at 11, is movable in the vertical direction. In the initial position shown in Fig. 1, the abutment member 10 rests against the upper edge of the piece of wood foremost in the feeding direction. During the movement of the carrier, the set of pieces of wood will force the abutment member 10 to move upwards, either against its own weight or against an external force applied to it, which means that the set of pieces of wood is braked, whereby the braking force can be determined by the abutment member. 10. The timber pieces 8 are prevented from falling over by the abutment member both when the flexible member 3 and thus the carrier 2 is accelerated at the start and then retarded when the center pieces 8 approach the layering position 12, where the timber pieces one by one, as the carrier 2 passes them, slide down the plunger 6 and down lying on the conveyor 7 for further handling. When the “last” piece of wood is to be delivered over the plunger plate 6, the abutment member 10 in its upper position is located at the same time as a new package of center pieces is fed into the layer. When the last piece of wood has been delivered, the abutment means 10 is lowered and the process is repeated.

Depending on the speeds used, ie. the g-force series occurring, it is possible that, as mentioned, the abutment member 10 only has to rest against the "main" piece of wood with its own weight. However, at high speeds and thus large accelerating and deceleration forces occurring, it is necessary to provide a regulated restraining force from the member 10.

In order that the incoming center pieces do not abut against the carrier 2 with the end in said feeding position, the layer is provided with a control arm 13 in connection with the respective layer assembly. This control arm guides in incorrect or obliquely incoming pieces of wood past the current carrier 2 and thereby prevents malfunction.

The guide arm 13 is hingedly mounted to the frame. In the joint 14 the control arm 13 is actuated by a torsion spring which, seen in Fig. 2, tends to turn the control arm 13 counterclockwise. When the carrier 2 assumes its feeding position, the carrier will engage with the free end of the control arm 13 and carry it with it, thereby turning the control arm 13 clockwise. During the feeding movement, the control arm 13 snaps loose from the carrier for abutment against a buffer 15. This arrangement ensures that the control arm 13 in the feeding position always assumes the correct setting position for pieces of wood in relation to the carrier 2. With the layer according to the invention it is possible to work with high operational reliability at the rates required by modern high-productivity saw lines, at the same time as the layer can be mounted horizontally, which eliminates disturbances in the installation of the timber bundles at a high rate to the layer.

Within the scope of the invention, it is possible to design the holding member in a manner other than that shown and described, e.g. the restraining member can instead be suspended vertically pivotably at the “upstream” end.

Claims (6)

10 15 20 509 744 "4 Patent claims A layer to which a number of adjacent pieces of wood (8) are fed in the longitudinal direction and which on the layer together form a layer, which on the layer in the transverse direction of the pieces of wood is moved by a carrier (2) to a plunger plate (6), where the pieces of wood in the layer one by one slide down on a conveyor (7) for further handling, characterized in that an abutment member (10) is arranged, which engages with the front piece of wood in the direction of movement. Layer according to claim 1, characterized in that the abutment member (10) engages with the upper edge of the piece of wood. Layer according to claim 1 or 2, (10) has the shape of a piece of timber located above the layer, boom vertically movable, characterized in that the abutment member is supported by the layer. Layer according to Claim 3, in that the boom, characterized by its own weight, rests on the piece of wood concerned. Layer according to claim 3, in that the boom with adapted characteristic force from an external power source (11) abuts on the piece of timber concerned. Layer according to one of Claims 2 to 5, characterized in that the boom is arranged inclined downwards in the direction of movement.