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United States Patent (19) 11 4,290,722 Rysti Et Al

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United States Patent (19) 11 4,290,722 Rysti Et Al United States Patent (19) 11 4,290,722 Rysti et al. 45 Sep. 22, 1981 (54) METHOD FOR USING TIMBER SORTING 3,789,980 2/1974 Nagy ................................... 209/518 COMPARTMENTS AND A SORTING 4,098,407 7/1978 Moore ................................ 209/517 COMPARTMENT FOR SAID METHOD FOREIGN PATENT DOCUMENTS 75 Inventors: Alpo Rysti, Friisilantie 36,02240 44.352 8/1967 Finland . Espoo 24, Finland; Seppo Anttila, 367931 6/1974 Sweden . Vantaa; Veijo Maki-Hoimela, Espoo, 405815 3/1977 Sweden. both of Finland Primary Examiner-Trygve M. Blix 73 Assignee: Alpo Rysti, Espoo, Finland Assistant Examiner-L. E. Williams Attorney, Agent, or Firm-Fitzpatrick, Cella, Harper & 21 Appl. No.: 64,116 Scinto 22 Filed: Aug. 6, 1979 57 ABSTRACT 51) Int. Cl............................................... B65G 65/00 52 U.S. Cl. ........................................ 414/48; 414/98; There is provided a method and apparatus whereby 414/786; 209/933 pieces of timber are sorted into lots on supporting arms 58. Field of Search ............... 209/517, 518, 519, 520, which are suspended by flexible and extensible mem 209/521,933; 414/48, 49, 98, 99, 100, 331, 786 bers. As the timber is added, the arms are lowered and finally extend down to a conveyor apparatus. The arms (56) References Cited then open to discharge the timber on to the conveyor U.S. PATENT DOCUMENTS apparatus and are then drawn up, are closed and reach 3,696,948 10/1972 Murdoch et al. ............... 209/933 X the start position where a new lot of timber is received. 3,700,120 10/1972 Romick et al. ..... ... 209/933 X 3,776,379 12/1973 Harvey .................................. 209/73 9 Claims, 3 Drawing Figures 10b 2 &2S. 12b SS 7 U.S. Patent Sep. 22, 1981 Sheet 1 of 3 4,290,722 U.S. Patent Sep. 22, 1981 she of 3 4,290,722 U.S. Patent Sep. 22, 1981 Sheet 3 of 3 4,290,722 4,290,722 1. 2 drawbacks mentioned above and to provide a simple METHOD FOR USING TIMBER SORTING and economical method and compartment construction. COMPARTMENTS AND A SORTING For attaining the objectives mentioned above and to COMPARTMENT FOR SAID METHOD be expressed later, the principal characteristic features of the invention are: BACKGROUND OF THE INVENTION That the timber lot is formed on rigid supporting arms suspended by pairs of flexible suspending organs; 1. Field of the Invention that by lengthening the hanging part of the suspend The present invention relates to sorting compart ing organ pairs, the supporting arms are lowered under ments and to a procedure for the use of such compart 10 the level of the take-up device; ments for sorting timber. In this procedure, a sorting that the locking of said supporting arms is opened or compartment is filled with timber pieces, after which it allowed to open; is opened and the timber lot that has accumulated into it that the supporting arms are lifted to the top position is allowed to discharge on the take-up equipment, with by shortening the hanging part of the suspending organ which the timber lot is then removed to be further pro 15 pairs; cessed. After discharging, the compartment is closed that the supporting arms are locked to form a closed for the reception of the next timber lot. bottom of the compartment for receiving pieces of the 2. Description of the Prior Art next timber lot, for which the procedure phases defined In timber sorting installations, various different com above will be repeated. partment sections with compartments into which tim 20 The principal characteristic features of a timber sort ber is directed according to its size and type are known. ing compartment in which the inventive procedure is For instance, such installations are known wherein a allied are: compartment bottom comprises a trap door hinged at its That to the lower end, at a suitable point, of said one edge, while the other end of the compartment is flexible supporters there are fastened rigid supporting suspended by flexible supporters for opening and clos 25 arms with appropriate locking equipment; ing the compartment by raising and lowering these that underneath the level of the take-up conveyor flexible supporters. For this kind of compartment sys there are suitable organs for opening said locking equip tem, we refer to the applicant's Finnish Patent Publica ment, and - tion No. 44352. that in the top part of the compartment there are As it has been noticed that, due to the high dropping 30 particular guiding organs for guiding the supporting altitude, timber may break in sorting compartments arms so to lock them in the position where they form described above, wherefor elevator- or lift-type com the closed bottom of the compartment when in the top partments have been taken into use, as in these, the position. timber lot is cautiously lowered on the take-up level, There has thus been outlined rather broadly the more which may for instance, be a carriage or a conveyor, 35 important features of the invention in order that the with which the timber lot is then removed to be further detailed description thereof that follows may be better processed. Such sorting compartment systems have understood, and in order that the present contribution recently been developed in which the compartments are to the art may be better appreciated. There are, of bags composed of flexible supporters, said bags being course, additional features of the invention that will be expanded as timber accumulates into the bag. Examples 40 described more fully hereinafter. Those skilled in the art of bag compartments of this type are described in the will appreciate that the conception on which this disclo applicant's Finnish patent application No. 773917, SE sure is based may readily be utilized as the basis of the Publication prints Nos. 367,931 and 405,815, and U.S. designing of other methods and structures for carrying Pat. No. 3,776,379. However, in these well-known com out the purposes of this invention. It is important, there partment constructions, there have been such draw 45 fore, that this disclosure be regarded as including such backs that they have not come into general use. As an equivalent constructions as do not depart from the spirit example of these drawbacks, one can mention compli and scope of the invention. cated and expensive structures, that also have an unfa BRIEF DESCRIPTION OF THE DRAWINGS vorable effect on the reliability of operation. Another 50 Several embodiments of the invention have been drawback is that as, in equipment known so far, the chosen for purposes of illustration and description, and drive mechanisms of the flexible supporters wind up are shown in the accompanying drawings forming a only one end of the supporter, and rewinding that must part of the specification, wherein; take place after the compartment has been emptied is FIG. 1 shows the compartment section of a timber too slow for modern highly efficient sorting equipment. 55 sorting installation, in which compartment section the As the flexible supporters are lengthened when filling inventive procedure is applied, with different compart up the compartment and as the compartment is opened ments shown in different phases of operation; only at its one edge, timber pieces at the edge areas of FIG. 2 is a plan view of a compartment section the bag come into a rotating movement that breaks shown in FIG. 1; and sharp edges of timber pieces thus lowering their quality. 60 Further, there is the additional drawback that special FIG. 3 shows the bottom of a compartment in five triggering mechanisms are required for opening and different phases of operation and in a larger scale. closing the flexible supporters. DESCRIPTION OF THE PREFERRED SUMMARY OF THE INVENTION EMBODIMENTS 65 As shown in FIGS. 1 and 2, timber pieces a, b are, We have conceived and contribute by the present with hooks 22 of top conveyor 20, brought to a sorting invention compartments of the class described by which compartment assembly that comprises several succes we are able to sort timber in a manner to avoid the sive sorting compartments, into which timber pieces fall 4,290,722 3 4. from hooks 22 according to controlled impulses. The means of lower conveyor 15, moving the timber lot T2 dropping is carried out with dropping equipment 21, forward, before it is necessary to lift arms 12a' and 12b' known as such, with for instance, stopper arms that upwardly. Arms 12a' and 12b' can, of course, be lifted come to the front of timber piece b as conveyor 20 to the top position past timber lot T2 before starting to moves in the direction of arrow E, whereat timber piece 5 move lot T2 by means of the bottom conveyor 15. b falls (arrow B) into the sorting compartment. As supporting arms 12a' and 12b' move from the Below the sorting compartments there is a lower position of FIG. 1 upwardly, flanges 25 of their top ends take-up conveyor 15 that takes timber lots T to be fur become guided by oblique surfaces 23 to the position ther processed, for instance to ribbing and packing ap shown in FIG. 3I, wherein flanges 25 have come under paratus. Instead of bottom conveyor 15, timber car 10 neath the overhead ledge 27 (FIG. 1). As supporters riages can also be used. 10a, 10b are tightened even more, the apparatus reaches The frame structure of the sorting compartments the position shown in FIG.3II, in which locking arm 14 comprise vertical beams 31 supported on foundation 30 is guided behind flange 35b at the end of arm.12b, which and connected with each other by horizontal beams 32 has already taken place in FIG.
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