FI118920B - Syötönpysäytin - Google Patents

Description

118920

FIELD OF THE INVENTION The present invention relates to a feed stop which stops material fed to a wood chipper and thereby prevents foreign objects from entering the blades and promotes machine safety.

Background of the Invention

The safety requirements for a modern small wood chipper 10 have been increased, among other things, by the ability to stop the feedable wood frame immediately by using a fixed piece of equipment attached to the front edge of the feed pan in the event of an emergency. To overcome such a requirement, a practice has emerged which utilizes a hydraulically actuated feed roller assembly as in patent application no. 886054. On the other hand, feed rollers are essential in hackers when the chopper does not pull in the wood without them. In some hackers, the angles between the blades, the blade and the feeder 15 are tracked so as to pull the material to be chipped into the device. In this case, the feeder is unnecessary for the chipping event itself and acts mainly as a safety actuator by stopping the feed. Hydraulically operated feeders unnecessarily increase the price of the machine and, especially in the case of a small wood chipper, the feed stop of the subject of the invention substantially reduces its cost.

BRIEF DESCRIPTION OF THE INVENTION The invention will now be described in more detail with reference to the accompanying drawings, in which: Fig. 1 is a schematic side view of an object of the invention in a chipper ··· ·! t *. Fig. 2 is a schematic view of the invention from above '* "· Fig. 3 is an enlarged detail of the side view. · ·: Fig. 4 is an enlarged detail of the side view.

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DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

A preferred embodiment of the present feed stop is described below with reference to the above-mentioned figures. In this case, the feed stopper comprises the components shown in the figures, which correspond to the reference numerals used in this specification.

*! ”Ϊ30 Reference numeral 1 denotes a chipper known per se to which a known feeder chute 2 is attached 2. At one end of the chute 2 a guide bar 3 known per se is pivotally connected about point A ·; At this point B of the arc, a guide member 4 (claim 4) is pivotally connected, which is pressed by a spring 5 around its axis C against a gently rotating roller 6, whereby the guide member deflected from the equilibrium position always returns to the inclined surfaces D and D '. the influence. The control member also includes movement limiting surfaces F and F '. At this end, a guide bar 12 is connected to the hinge shaft 10 of the brake disc 9. At the other end of the hinge bar, a tuning bar 12 is connected, whereupon the stop feeder is pulled or pushed, 7, the attached mating surface 8 moves away from the mating surface 5 11, releasing the brake disc 9. Under the action of the tuning bar, this presses the wood 13 in the feed trough 2 against the bottom of the trough. Braking power can be increased by sharpening or toothing and shaping the front edge 14 of the brake disc 9 to improve grip. The stopped wood is released by raising the tuning bar 12, whereby the abutment surface 11 attached to the hinge shaft 10 contacts the guide abutment 15 on the abutment surface 8, pushing the abutment surface 8 to the side. This mating surface 8 returns to the center position as soon as the mating surface 11 is passed, as it is linked to the guide arc 3. As a result, the two surfaces lock together and the system is armed for a new trip. The weight 16 attached to the tuning bar enhances brake performance. Naturally, a spring or any machine element with potential energy can be used to enhance this function. Due to geometric reasons, the counter surfaces can be traced around the hinge axis in many positions. The system shown is thus an embodiment of the invention.

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Claims (4)

An apparatus for stopping feeding, said apparatus having a guide ridge (3) rotatable by means of joints fixed to an axis (A) in a feeding chute of a wood chipper; a control means (4) which connects to this control path via a point (B) and comprises abutment surfaces (D, D ', F, F'); a spring (5) pushing the guide member against a roller (6); a bar (7) connecting to a point (E); an abutment surface (8) provided with a cam (15) which attaches to one end of the rod; a brake disc (9) connecting to a threaded shaft (10), an abutment surface (11) and an adjusting rod (12), characterized in that the control means (4) connecting to the guide bore (3) centers the abutment surface (8) in relation to the abutment surface (11) after release. Device for stopping supply according to claim 1, characterized in that it consists of at least one guide rod (3), a guide rod (7) provided with a abutment surface (8) in connection with the guide rod and a brake disc (9) as rotatably with the help of threaded hooks have attached to the feeding trough. Device for stopping supply according to claim 1, characterized in that one of the abutment surfaces (11) or (8) belongs to a guide cam (15). ^ • j · Device for stopping supply according to claim 1, characterized in that control means (4) jj movement. • m • · 4 m • »· • aa ··· · · · · a • a» · »* a • aa • · * • · · * · • a • a« ·· • aaaa · a ·· • • «a ·· # · • · • a ·· ·· • ·