EP0512970B1 - Installation de fabrication ou de montage de palettes en bois - Google Patents

Installation de fabrication ou de montage de palettes en bois Download PDF

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Publication number
EP0512970B1
EP0512970B1 EP92850103A EP92850103A EP0512970B1 EP 0512970 B1 EP0512970 B1 EP 0512970B1 EP 92850103 A EP92850103 A EP 92850103A EP 92850103 A EP92850103 A EP 92850103A EP 0512970 B1 EP0512970 B1 EP 0512970B1
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EP
European Patent Office
Prior art keywords
board
runners
disposed
assembly line
boards
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EP92850103A
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German (de)
English (en)
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EP0512970A1 (fr
Inventor
Tauno Taalikka
Reijo Taalikka
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TAALIKKA Oy
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TAALIKKA Oy
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M3/00—Manufacture or reconditioning of specific semi-finished or finished articles
    • B27M3/0013—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles
    • B27M3/0073—Manufacture or reconditioning of specific semi-finished or finished articles of composite or compound articles characterised by nailing, stapling or screwing connections

Definitions

  • the present invention relates to apparatus for manufacturing or assembling load pallets according to the preamble of claim 1.
  • apparatus is known from, for example, US-A-3 968 560.
  • a pallet is manufactured by firstly nailing intermediate props to footboards in a first nailing machine on a first assembly line to form runners. Thereafter, the runners are inverted and transferred to a second assembly line running in the same direction as, and arranged parallel to, the first assembly line. On the second assembly line, intermediate boards and/or deckboards are nailed to the runners in a second nailing machine to thereby produce a finished pallet.
  • the apparatus can be made inexpensive because there is no need to provide a plurality of separate nailing machines.
  • FIG. 1 is depicted, as viewed obliquely from above, an axonometric overall view of an apparatus intended to be used in manufacturing or assembling load pallets constructed of wood, such as standard load pallets, from pre-sawed pieces of timber.
  • Fig. 2 is depicted a top view of the same apparatus.
  • the invention actually concerns the apparatus encircled with a dot-and dash line A.
  • This apparatus manufactures a load pallet from its components.
  • the other apparatus units B, C, D, E, F and G are provided for further treatment of the load pallet.
  • B is a branding station comprising six branders with which the requisite pallet identification markings are made on the load pallet.
  • C is a foot board milling station by which the parts between the spacer props of the foot boards are milled, simultaneously on either side of the pallet.
  • D is a mitre sawing station where four circular saws cut the corners of the pallet, simultaneously.
  • E is a pallet turning station where, when required, the pallet is turned about.
  • F is a pallet bundling station which stacks the pallets in a bundle and moves a turned pallet for crosswise piling.
  • G is a completed bundle conveyor. The total length of the line including the after-treatment apparatus is about 25 metres.
  • the length of the apparatus unit A is about 8 m and its breadth, 2.3 m.
  • the capacity of this apparatus is 2000 pallets per eight hours.
  • the apparatus is operated by three workers, who load pre-sawn blanks, or various components of the load pallet, in their respective cassettes.
  • Around the apparatus A intermediate stores for blanks, H, are provided, and the requisite controls are concentrated in the control/electric desk J containing control logics and manual operating switches.
  • the apparatus of this exemplary embodiment is disposed to assemble standard load pallets of sizes 1200 x 800 and 1200 x 1000.
  • a typical load pallet that can be assembled with the apparatus A of the invention, Fig. 3, and the same in exploded view presentation, Fig. 4.
  • the load pallet comprises three foot boards 1, mutually parallel and spaced from each other; three intermediate props 2 for each foot board 1, these intermediate props 2 being arranged with equal spacing over the length of each foot board 1; three intermediate boards 3, fixed upon the intermediate props 2 transversely relative to the foot boards 1; and a plurality of deck boards 4 which are nailed fast to the intermediate boards 3, upon these.
  • load pallets can be manufactured, within the scope of the present inventive idea, with this apparatus by suitably modifying same, which pallets would have a number of foot boards 1, intermediate props 2, intermediate boards 3 and deck boards 4 differing from the example just presented.
  • deck boards can be substituted, for instance, a coherent sheet.
  • the dimensions and proportions of the components mentioned may be different from those in the example.
  • Fig. 5 reveals that the apparatus A comprises a first assembly line I and a second assembly line II.
  • the first assembly line I and the second assembly line II are disposed side by side so that the transport direction of the second assembly line II is opposite to that of the first assembly line I.
  • the transport direction on the lines I and II is indicated with heavy arrows.
  • the apparatus further comprises a transport means 7, arranged to transport runners 5 assembled on the first assembly line I over to the second assembly line II.
  • the nailing means of lines I and II, 61 and 62, are combined in a single nailing means entity 6.
  • the intermediate props 2 are with the aid of the nailing means 61 nailed together with the foot boards 1 so that the intermediate props 2 are located under the foot boards 1, whereby the said runner 5 is formed.
  • a transport means 7 has been provided, by which the runners 5 are moved and turned 180° relative to their longitudinal axis to the beginning of the second assembly line II in such manner that the foot boards 1 are now below and the intermediate props 2 are on top.
  • the runners 5 are then moved on the second assembly line II, in the opposite direction relative to the first assembly line I, towards the nailing means 62, prior to which the intermediate boards 3 are placed transversely upon the intermediate props and the deck boards 4 are placed lengthwise upon the intermediate boards 3, all these being finally nailed together with the aid of the nailing means 6.
  • the first assembly line I comprises, first, intermediate prop cassettes 8, in which the intermediate props 2 are stacked one upon the other. Since this exemplary apparatus turns out load pallets with three runners 5, three intermediate prop cassettes 8 have been provided side by side. After them follows the same number, that is three, foot board cassettes 9 side by side, the foot boards 1 being stacked in these cassettes, longitudinally in relation to the direction of transport. Furthermore, the first assembly line comprises a first conveyor 10, disposed to run past below the intermediate prop cassettes 8 and the foot board cassettes 9, to pick up intermediate props 2 and foot boards 1 from the intermediate prop cassettes 8 and the foot board cassettes 9. The conveyor 10 further transports the runners 5, lying side by side, to the nailing station 61 so that the foot board 1 lies upon the intermediate props 2 and the intermediate props 2 are spaced by a given distance in the longitudinal direction of the foot board 1.
  • the first assembly line further comprises, after the nailing means 61, an auxiliary conveyor 11 (see Fig. 10), disposed to receive the nailed runners 5 from the nailing station 61, to move the runners 5 transversely to lie at a spacing consistent with the spacing of the runners on the completed load pallet, and furthermore to transport the runners 5 longitudinally into reach of the transport means 7.
  • an auxiliary conveyor 11 see Fig. 10
  • the first conveyor 10 is a chain conveyor comprising a pair of sprocket chains 121 and 122, a pair of deflection wheels 131,132 and a pair of traction wheels 141,142. Each chain, 121 and 122, travels in an endless run over the deflection wheels 131,132 and the traction wheels 141,142. The deflection wheel pair and the traction wheel pair are horizontally spaced from each other.
  • the conveyor 10 comprises intermediate prop dogs 15, or crossbars 18, connected to the traction members 121 and 122 with such spacing in the transport direction as corresponds to the spacing of the intermediate props on the completed runner 5, or on the load pallet.
  • Said intermediate prop dogs take intermediate props 2 along with them from the intermediate prop cassettes 8.
  • Each intermediate prop cassette 8 includes a retainer means 100 which retains the lowermost intermediate prop 2 in its cassette, until it allows this intermediate prop to drop onto the conveyor at the proper moment.
  • every third intermediate prop dog crossbar 18 is provided with a row of pins 19, which serve as foot board dogs 17.
  • Fig. 7 the situation is depicted in which the crossbars 18 are in the process of taking along intermediate props 2.
  • the crossbar which is last in the direction of transport is at best passing through below the intermediate prop cassette 8.
  • the conveyor 10 has moved onward a bit, whereby the pin on said last crossbar 18 is in contact with the lowermost foot board 1 in the foot board cassette 9 and proceeds to push this board ahead of itself and out from the cassette, whereby the board is deposited upon the preceding intermediate props 2, in correct position.
  • Fig. 9 shows the section IX-IX of the foot board cassette 9 of Fig. 8.
  • the crossbar 18, which is attached to the traction members 121 and 122.
  • Three pins 19 project upwards from the crossbar 18.
  • the foot board cassette 9 comprises supporting flanges 201,202 for carrying the stack of foot boards. Between said supporting flanges is left a slot 21 longitudinal to the cassette 9, and this slot is disposed to receive the pin 19 and the pin 19 can move in the slot through the entire cassette.
  • Runners are made simultaneously, side by side, as many as the completed load pallet is meant to have.
  • the runners assembled in the way just described are carried on the conveyor 10 to the nailing means 61; the conveyor 10 is repeatedly stopped for a moment while foot nails are driven from the side of the foot boards 1 through these boards into the intermediate props 2, in order to assemble the runners 5.
  • the entire apparatus A is schematically shown in Fig. 10, however omitting the transport means 7, which is presented in greater detail in Fig. 11.
  • the auxiliary conveyor 11 belonging to the first assembly line I, this auxiliary conveyor receiving from the nailing means 61 the runners 5 produced from foot boards 1 and intermediate props 2 by nailing these together, whereafter the auxiliary conveyor 11 moves the runners 5 transversely relative to the transport direction to be spaced from each other as the runners are spaced in the completed load pallet, and transports the runners further in their longitudinal direction into reach of the transport means 7. It is thus understood that at the end of the first assembly line I the runners 5 are positioned with the intermediate props 2 downward and the foot boards 1 upward. In the completed load pallet they are positioned the other way around.
  • the runners have to be turned through 180°, i.e., inverted, as has been illustratively indicated in Fig. 10. This transport and inverting operation is accomplished with the transport means 7, shown in Fig. 11.
  • Fig. 11 is depicted the transport means 7 by which the transport of the runners 5 and their simultaneous inverting is accomplished at the ultimate end of the first assembly line I, to deposit them at the beginning of the second assembly line II.
  • the transport means 7 comprises gripping members 22 for gripping the runners 5, and an inverting means 23 to which said gripping members 22 are attached.
  • the inverting means 23 is pivoted between the first assembly line I and the second assembly line II to be turnable about a turning axle 24 through more than 180°.
  • the inverting means 23 includes a body frame 25, disposed to receive within itself the runners 5.
  • the gripping members 22 include pushers 261, 262 and 263, operated by force means and disposed on one side of the body frame, and counter-members 271,272,273, e.g. rubber stops, disposed on the body frame in register with the pushers so that the runners 5 can be longitudinally urged with the pushers against said counter-members in order to achieve a firm grip on the runners, so that their lifting and inverting can be accomplished.
  • the inverting means 23 further comprises turning arms 28, the body frame 25 being fixed in a fork formed by these arms.
  • the turning arms 23 are joined to each other with a shaft.
  • On the end of the shaft a gear wheel is provided which meshes with a tooth rack, this tooth rack being movable by the aid of a power member, in order to swivel the turning means reciprocatingly between the first and second assembly lines.
  • the transport means 7 is so controlled that it supports the runners 5 at a given height above the conveyor 31 of the second assembly line II in stand-by until the dogs of the conveyor 31 of the second assembly line II have come into correct position, so that the runners 5 can be lowered down on the conveyor 31 of the second assembly line II with proper timing.
  • Figs 10, 12 and 13 illustrate the arrangements provided on the second assembly line II.
  • This conveyor includes dogs disposed in such a way that, first, the intermediate boards 3 will be deposited in proper positions upon the intermediate props 2 and, further, the deck boards 4 will be deposited in proper positions upon the intermediate boards 3.
  • the second assembly line II comprises one transversal intermediate board cassette 29, in which the intermediate boards 3 are stacked, transversely relative to the transporting direction of the line II. Thereafter follow deck board cassettes 30, in which the deck boards 4 are stacked, parallelling the transporting direction of the line.
  • the number of deck board cassettes 30 equals the number of deck boards on one completed load pallet.
  • the second assembly line II comprises a chain conveyor 31, disposed to run below the intermediate board cassette 29 and the deck board cassettes 30 and to pick up intermediate boards 3 from the intermediate board cassette 29 to be deposited upon the intermediate props 2 on the runners 5, and to pick up deck boards 4 from the deck board cassettes 30 to be deposited upon the intermediate boards 3.
  • the conveyor 31 transports the runners and the intermediate and deck boards to the nailing means 62, to cause them to be nailed together.
  • Figs 12 and 13 reveal the way in which the conveyor 31 is composed. It comprises a pair of endless traction members 321,322, or sprocket chains, a pair of deflection wheels 331,332, and a pair of traction wheels 341,342. As in the conveyor of the first assembly line I, here too the deflection wheel pair and the traction wheel pair are disposed with a horizontal spacing, and the traction member pair is disposed to run around the deflection wheel pair and the traction wheel pair, which is driven by a power means 35.
  • the conveyor 31 comprises intermediate board dogs 36, connected to both sprocket chains 321,322 with such spacing in the transporting direction which is consistent with the spacing of the intermediate boards 3 on a load pallet, and they are disposed to pick up intermediate boards 3 from the intermediate board cassette 29.
  • the conveyor further comprises deck board dogs 37, connected to the traction members for picking up deck boards 4 from the deck board cassettes 30.
  • the chains 321,322 are provided, at opposed points, with triangular intermediate board dogs 36, by which the intermediate boards 4 are picked up from the cassette 29 and deposited at their proper locations.
  • the triangular dogs 36 are pivotally carried on the chains, and they include a guide follower 37, which in cooperation with a guide rail 38 on the side of the conveyor turns the dog into pick-up position at the right point, immediately before the intermediate board cassette 29.
  • the intermediate board dog In its position at rest, the intermediate board dog lies parallel to the traction member, beside the traction member and outside the conveyor, so that it is out of the way when it is not needed. In its operating position, the intermediate board dog is turned transversely relative to the traction member so that it will push an intermediate board 3 out from the intermediate board cassette 29 when it comes to the cassette.
  • the two intermediate board dogs 361,362 which face the plurality of runners first in the transporting direction are turnable, and the third intermediate board dog 363 is an elongated crossbar 39, transversely attached to the traction members 321,322, between them, and arranged to push the runners 5 ahead of itself.
  • Figs 13 and 14 reveal that, like the foot board dogs of the line I, the deck board dogs 37 also consist of pins 40 attached to a crossbar 39.
  • the number of these pins 40 equals that of deck board cassettes 30 provided side by side.
  • Each deck board cassette 30 comprises supporting flanges 41, for carrying the stack of deck boards, and between these supporting flanges 41 remains a slot 42 longitudinal to the cassette 30, disposed to receive in itself the pin 40.
  • Each pin 40 pushes one deck board 4 at a time, in the longitudinal direction thereof, out from each foot board cassette 30 and down upon the intermediate boards 3. After all components have in this way been properly positioned, they are transported to the nailing means 62, which constitutes one single nailing means entity 6 together with the nailing means 61 which is used on the first assembly line I.
  • the nailing means entity 6 composed of the nailing means 61 and 62 of the first and second assembly lines, I and II, respectively.
  • the nailing means entity 6 comprises a frame 46, an upper beam 47, vertically guided to be movable relative to the frame, two hydraulic cylinders 48, connected between the upper beam 47 and the frame 46 and with which a vertical nailing stroke of the upper beam is accomplished.
  • To the upper beam 47 are connected, in the present apparatus, about thirty nailing rams 49 and an equal number of side-by-side nail magazines 50.
  • the nail magazines 50 are carried on the frame 46.
  • the nailing means entity further comprises nail supply stores 53, or nail boxes, and feeding means 54 for feeding nails from these nail boxes into the nail magazines 50.
  • Fig. 16 shows one nail magazine 50 of the nailing means 62.
  • the nail magazine 50 comprises a guide 51 in which the nailing ram 49 can move, and a feeder guide 50 for feeding nails into nailing standby position to be ready to be rammed.
  • the figure depicts the situation in which a deck nail 200 has been driven with the ram 51 through the deck board 4 and the intermediate board 3.
  • Clenching means 43 bends the points of the deck nails 200 that have been driven through the deck and intermediate boards, back into the intermediate board 3.
  • the clenching means 43 comprises a bender plate 44 and, for horizontally moving same, a hydraulic cylinder 45.
  • the bender plate 44 is configurated to have transversely consecutive triangular ridges, the side faces of any two adjacent ridges cooperating to bend the nail as the plate is being moved and forming the nail into hook shape.
  • the nailing takes place one row at a time in accordance with the nailing pattern, and therefore the nailing magazines 50 are disposed to be movable as may be required for the desired nailing pattern.
  • the conveyor 31 stops the load pallet for a brief moment for the nailing of each row.
  • the load pallet After passing through the nailing means, the load pallet is one completely assembled entity, and it goes to the inspection station B, where the quality and acceptability of the pallet can be visually assessed. If the pallet is defective, it can be removed from the line at this station. In any other case the pallet proceeds into storage and/or to further treatments in stations C to G (Fig. 1).

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Pallets (AREA)
  • Automatic Assembly (AREA)
  • Refuse-Collection Vehicles (AREA)
  • Error Detection And Correction (AREA)
  • Heat Treatment Of Steel (AREA)
  • Fats And Perfumes (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Executing Machine-Instructions (AREA)

Claims (23)

  1. Appareil pour la fabrication ou l'assemblage de palettes de chargement construites en bois, en partant de planches/de morceaux sciés d'avance, ledit appareil comprenant une première chaîne d'assemblage (I), pour assembler des semelles (1) à des cales intermédiaires (2) pour former des longerons (5), et une seconde chaîne d'assemblage (II), pour assembler les longerons (5) avec des planches intermédiaires (3) et un élément de dessus, comme par exemple des planches de dessus (4) et un moyen de transport (7) installé de manière à transporter les longerons (5), assemblés sur la première chaîne d'assemblage (I) jusqu'à la seconde chaîne d'assemblage (II), chaque chaîne (I et II) comprenant des moyens de clouage (6¹, 6²), caractérisé en ce que la première chaîne d'assemblage (I) et la seconde chaîne d'assemblage (II) sont placées côte-à-côte de manière qu'une direction de transport de la seconde chaîne d'assemblage (II) soit opposée à celle de la première chaîne d'assemblage (I), et en ce que les moyens de clouage (6¹, 6²) des chaînes sont associés pour former un seul ensemble de moyens de clouage (6) en regroupant lesdits moyens de clouage sur un seul bâti (46).
  2. Appareil selon la revendication 1, caractérisé en ce que la première chaîne d'assemblage (I) est agencée pour assembler les longerons (5) de la palette de chargement, en même temps et côte-à-côte de manière que la semelle (1) de chaque longeron (5) soit posée sur les cales intermédiaires (2) ; et en ce que le moyen de transport (7) est disposé au sujet de la direction de transport, de manière à retourner les longerons de 180° par rapport à l'axe longitudinal, afin que, sur la seconde chaîne d'assemblage (II), les longerons (5) soient dans une position où les semelles (1) sont placées sous les cales intermédiaires (2).
  3. Appareil selon la revendication 1 ou 2, caractérisé en ce que la première chaîne d'assemblage (I) comprend :
    - une pluralité de caissettes (8) de cales intermédiaires dans lesquelles les cales intermédiaires (2) sont empilées, et le nombre de ces caissettes de cales intermédiaires étant égal au nombre de longerons (5) de chaque palette de chargement terminée ;
    - une pluralité de caissettes (9) de semelles, dans lesquelles les semelles (1) sont empilées parallèlement à la direction de transport de la chaîne, et le nombre de ces caissettes de semelles étant égal au nombre de longerons (5) d'une palette de chargement terminée ;
    - un premier convoyeur (10) installé pour circuler sous les caissettes (8) de cales intermédiaires et sous les caissettes (9) de semelles pour prélever des cales intermédiaires et des semelles dans les caissettes (8) de cales intermédiaires et les caissettes (9) de semelles et pour les transporter jusqu'à une station de clouage (6¹), de manière que la semelle (1) soit posée sur les cales intermédiaires (2) et que les cales intermédiaires soient espacées l'une de l'autre dans la direction longitudinale de la semelle.
  4. Appareil selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la première chaîne d'assemblage (I) comprend un convoyeur auxiliaire (11), disposé pour recevoir les longerons cloués (5) du moyen de clouage (6¹), afin de transporter les longerons dans une direction transversale pour qu'ils soient espacés de la même manière que les longerons d'une palette de chargement terminée, et pour transporter les longerons longitudinalement en les mettant à la portée desdits moyens de transport (7).
  5. Appareil selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le premier convoyeur (10) comprend :
    - une paire d'éléments de traction sans fin (12¹, 12²), tels que des chaînes à barbotin ;
    - une paire de roues de déflexion (13¹, 13²), par exemple une paire de roues dentées ;
    - une paire de roues de traction (14¹, 14²) telle qu'une paire de roues dentées ;
       ladite paire de roues de déflexion et ladite paire de roues dentées étant disposées avec un certain écartement horizontal, et la paire d'éléments de traction étant installée pour passer sur la paire de roues de déflexion et sur la paire de roues de traction, laquelle est entraînée par un moyen moteur (15).
  6. Appareil selon la revendication 5, caractérisé en ce que le premier convoyeur (10) comprend des crochets (16) pour cales intermédiaires, reliés aux éléments de traction (12¹, 12²) avec, dans la direction de transport, un espacement qui équivaut à l'espacement des cales intermédiaires sur le longeron terminé (5) sur la palette de chargement, et montés pour prélever des cales intermédiaires (2) dans les caissettes (8) de cales intermédiaires, et des crochets (17) à semelles reliés aux éléments de traction (12¹, 12²) pour prélever des semelles (1) dans les caissettes (9) de semelles.
  7. Appareil selon la revendication 6, caractérisé en ce que les crochets (16) pour cales intermédiaires comprennent une première traverse allongée (18) ou analogue, fixée transversalement par rapport aux éléments de traction (12¹, 12²), et entre eux ; et en ce que chaque caissette (8) de cales intermédiaires est agencée pour délivrer une seule cale intermédiaire (2) à la fois, pour que la traverse (18) la prélève.
  8. Appareil selon la revendication 6 ou 7, caractérisé en ce que les crochets (17) à semelles sont des axes (19) fixés à la traverse (18) ; et en ce que la caissette (9) de semelles comprend des brides support (20¹, 20²), destinées à supporter la pile de semelles, entre lesdites brides support se trouve formée une fente (21) dans la direction longitudinale de la caissette, pour recevoir un axe (19), l'axe (19) étant agencé pour pousser une semelle (1) à la fois dans sa direction longitudinale en la dégageant de la caissette (9) de semelles et en la faisant descendre sur les cales intermédiaires (2).
  9. Appareil selon l'une quelconque des revendications 6 à 8, caractérisé en ce que les crochets pour cales intermédiaires (16¹, 16²), qui sont les premiers, dans la direction de transport, face à un ensemble de longerons (5¹, 5², 5³) de la caissette de chargement à fabriquer sur la première chaîne d'assemblage (I), sauf le dernier, sont des traverses (18) sans axe (19), et en ce que le dernier crochet pour cales intermédiaires (16) est une traverse pourvue d'axes.
  10. Appareil selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le moyen de transport (7) comprend :
    - des moyens d'agrippage (22) pour agripper les longerons (5) ; et
    - des moyens de retournement (23) auxquels les éléments d'agrippage (22) sont fixés, et qui sont montés en pivotement entre la première chaîne d'assemblage (I) et la seconde chaîne d'assemblage (II), de manière à pouvoir tourner autour d'un axe de rotation (24), pour retourner les longerons (5) et les transporter jusqu'à la seconde chaîne d'assemblage (II).
  11. Appareil selon la revendication 10, caractérisé en ce que les moyens de retournement (23) comprennent une ossature (25) placée pour recevoir, à l'intérieur, le longeron (5) ; et en ce que les éléments d'agrippage (22) comprennent des poussoirs (26¹, 26², 26³) à moteur montés de chaque côté de ladite ossature, et des contre-éléments (27¹, 27², 27³) montés sur ladite ossature, du côté opposé, afin que les longerons (5) puissent être sollicités par les poussoirs contre lesdits contre-éléments.
  12. Appareil selon la revendication 10 ou 11, caractérisé en ce que les moyens de retournement (7) comprennent un bras tournant (28) auquel l'ossature (25) est fixée, et en ce que ledit bras tournant est supporté pour être tournant autour d'un essieu tournant (24).
  13. Appareil selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la seconde chaîne d'assemblage (II) comprend :
    - une caissette (29) de planches intermédiaires dans laquelle les planches intermédiaires (3) sont empilées transversalement par rapport à la direction de transport de la chaîne ;
    - une pluralité de caissettes de planches de dessus (30), dans lesquelles les planches de dessus (4) sont empilées dans la direction du transport de la chaîne, et en ce que le nombre de ces caissettes de planches de dessus est égal au nombre des planches de dessus d'une palette de chargement terminée ; et
    - un second convoyeur (31), agencé pour circuler sous la caissette de planches intermédiaires et les caissettes de planches du dessus, afin de prélever des planches intermédiaires (31) dans la caissette (29) de planches intermédiaires, de les faire descendre sur les cales intermédiaires (2) des longerons (5), et pour prélever des planches de dessus (4) dans les caissettes (30) des planches de dessus en les faisant descendre sur les planches intermédiaires (4) et pour les transporter jusqu'au poste de clouage (6²) afin que les longerons, les planches intermédiaires et les planches de dessus soient cloués ensemble.
  14. Appareil selon la revendication 13, caractérisé en ce que la seconde chaîne d'assemblage (II) comprend :
    - une paire d'éléments de traction sans fin (32¹, 32²), telle qu'une paire de chaîne à barbotin ;
    - une paire de roues de déflexion (33¹, 33²) telle qu'une paire de roues dentées ;
    - une paire de roues de traction (33¹, 33²) telle qu'une paire de roues à barbotin ;
       la paire de roues dentées et la paire de roues de traction étant disposées avec un certain espacement horizontal, et la paire des éléments de traction étant installée pour passer par dessus ladite paire de roues de déflexion et ladite paire de roues de traction, en étant entraînées par un moyen (35) à moteur.
  15. Appareil selon la revendication 14, caractérisé en ce que le second convoyeur (31) comprend des crochets (36) pour planches intermédiaires reliés aux éléments de traction (32¹, 32²) avec, dans la direction de transport un espace qui correspond à l'espace entre les planches intermédiaires (3) sur la palette de chargement, et installés pour prélever des planches intermédiaires (3) dans la caissette (29) de planches intermédiaires ; et des crochets (40) pour planches de dessus, reliés aux éléments de traction, pour prélever des planches de dessus (4) aux caissettes (30) de planches de dessus.
  16. Appareil selon la revendication 15, caractérisé en ce que le crochet (36) pour planches intermédiaires est supporté en pivotement sur l'élément de traction (32¹, 32²) pour pouvoir tourner horizontalement entre une position de repos et une position active, le crochet pour planches intermédiaires dans sa position de repos étant posé parallèlement à l'élément de traction, à côté de l'élément de traction, et en dehors du convoyeur, de manière à ce qu'il soit en dehors du circuit quand il n'est pas nécessaire, et que, dans sa position active, le crochet pour planches intermédiaires soit tourné pour être orienté perpendiculairement à l'élément de traction de façon à pouvoir pousser une planche intermédiaire en la dégageant de la caissette de planches intermédiaires au moment où il arrive en face de la caissette de planches intermédiaires.
  17. Appareil selon la revendication 15 ou 16, caractérisé en ce que le crochet (36) pour planches intermédiaires comprend un suiveur de guidage (37), monté en coopération avec un rail de guidage fixe (38), sur le côté du convoyeur (31) pour faire tourner le crochet de planches intermédiaires jusqu'à sa position de prélèvement avant la caissette de planches intermédiaires, de façon qu'au moment où la rangée formée par les cales intermédiaires des longerons (5) placées côte-à-côte, arrive sous la caissette de planche intermédiaire, les crochets pour planches intermédiaires tournent et poussent une planche intermédiaire en la faisant descendre sur les cales intermédiaires.
  18. Appareil selon l'une quelconque des revendications 15 à 17, caractérisé en ce que les crochets (36¹, 36²) pour planches intermédiaires qui sont les premiers, placés en face de la pluralité des longerons d'une palette de chargement dans la direction de transport, sauf le dernier crochet, soient tournants, et que le dernier crochet (36³) pour planches intermédiaires soit une seconde traverse allongée (39) ou un élément du même type, disposé transversalement entre les éléments de traction (32¹, 32²), et que ce crochet soit installé pour pousser les longerons devant lui, et que la caissette (29) de planches intermédiaires soit agencée pour délivrer une planche intermédiaire (3) en contact avec ladite traverse (39).
  19. Appareil selon l'une quelconque des revendications 15 à 18, caractérisé en ce que les crochets pour planches de dessus (40) sont des axes (40) fixés à la seconde traverse (39) ; et en ce que la caissette de planches de dessus (30) comprend des brides support (41) pour supporter la pile des planches de dessus, entre lesdites brides support (41), une fente (42) étant formée dans la direction longitudinale de la caissette (30), et disposée pour recevoir l'axe (40), cet axe étant disposé pour pousser une planche de dessus (4) par caissette à la fois dans sa direction longitudinale en la dégageant de la caissette de planches de dessus (30) et en la faisant descendre sur les planches intermédiaires (3).
  20. Appareil selon l'une quelconque des revendications 1 à 19, caractérisé en ce que les moyens de clouage (6²) comprennent un moyen de rabattement (43) pour recourber dans le bois les clous qui ont été cloués à travers les planches de dessus et intermédiaire.
  21. Appareil selon la revendication 20, caractérisé en ce que le moyen de rabattement (43) comprenant une plaque de rabattement (44) et un élément à force (45), tel qu'un vérin hydraulique, pour déplacer la plaque de rabattement horizontalement.
  22. Appareil selon l'une quelconque des revendications 1 à 21, caractérisé en ce que l'ensemble des moyens de clouage (6 ; 6¹, 6²) comprend :
    - une poutre supérieure (47), guidée verticalement pour se déplacer par rapport à l'ossature ;
    - des moyens à force (48), tels que des vérins hydrauliques montés entre la poutre supérieure et l'ossature pour créer la course de clouage de la poutre supérieure ;
    - une pluralité de pilons de clouage (49) fixée sur la poutre supérieure ;
    - une pluralité de magasins (50) à clous, reliés à l'ossature (46), et lesdits magasins comprenant un guide (51) pour le pilon de clouage et un guide d'alimentation (52) pour introduire des clous dans l'installation de clouage afin de les enfoncer,
    - une réserve de clous intermédiaire,
    - des moyens d'alimentation (54) pour introduire des clous de la réserve intermédiaire de clous dans le magasin à clous.
  23. Appareil selon la revendication 22, caractérisé en ce que les magasins en ce que les magasins (50) à clous sont montés mobiles en fonction de la configuration de clouage.
EP92850103A 1991-05-07 1992-05-07 Installation de fabrication ou de montage de palettes en bois Expired - Lifetime EP0512970B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI912188A FI86819C (fi) 1991-05-07 1991-05-07 Anordning foer framstaellning eller hopsaettning av lastplattformer som traekonstruktion
FI912188 1991-05-07

Publications (2)

Publication Number Publication Date
EP0512970A1 EP0512970A1 (fr) 1992-11-11
EP0512970B1 true EP0512970B1 (fr) 1995-07-12

Family

ID=8532454

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Application Number Title Priority Date Filing Date
EP92850103A Expired - Lifetime EP0512970B1 (fr) 1991-05-07 1992-05-07 Installation de fabrication ou de montage de palettes en bois

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EP (1) EP0512970B1 (fr)
AT (1) ATE124904T1 (fr)
DE (1) DE69203382T2 (fr)
FI (1) FI86819C (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2155369B1 (es) * 1999-01-14 2001-12-16 Guisasola Alejandro Estancona Maquina para fabricacion de palets.
IES20000286A2 (en) * 2000-04-19 2001-06-13 Sean Lehane An apparatus and process for the manufacture of pallets
US6763567B2 (en) 2002-05-14 2004-07-20 Fastening Technologies, Llc Pallet assembly device and method of assembling pallets
FR2929971B1 (fr) * 2008-04-10 2015-12-25 Patrick Hurpin Element de charpente et son procede de realisation
CN103496018B (zh) * 2013-10-15 2015-05-06 邹建静 一种木托盘装订设备
CN105729607B (zh) * 2016-03-07 2017-12-19 温州建静木业有限公司 木托盘全自动生产机
EP3623128B1 (fr) * 2018-09-12 2021-03-17 Talozzi, Roberto Machine et mèthode pour assembler des palettes
CN109262767A (zh) * 2018-10-30 2019-01-25 郑椒烈 一种建筑用模板自动化生产设备
CN116141451B (zh) * 2023-04-03 2024-01-12 芜湖奔腾包装股份有限公司 一种木托盘生产用流水线式组装设备

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1215674A (en) * 1968-05-27 1970-12-16 Fmc Corp Pallet manufacture
US3968560A (en) * 1974-12-16 1976-07-13 Fmc Corporation Pallet assembling system
US4168566A (en) * 1977-11-07 1979-09-25 Streckert Thomas E Apparatus and method for nailing and nesting pallets
US4394952A (en) * 1980-10-17 1983-07-26 Crane Richard A Adjustable deck board feeder for automatic pallet nailing apparatus

Also Published As

Publication number Publication date
FI86819C (fi) 1992-10-26
FI912188A (fi) 1992-07-15
ATE124904T1 (de) 1995-07-15
FI86819B (fi) 1992-07-15
DE69203382D1 (de) 1995-08-17
EP0512970A1 (fr) 1992-11-11
FI912188A0 (fi) 1991-05-07
DE69203382T2 (de) 1996-04-04

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