US20080313994A1 - Method and Apparatus For Manufactring a Nail Plate Truss Without Setting - Google Patents

Method and Apparatus For Manufactring a Nail Plate Truss Without Setting Download PDF

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Publication number
US20080313994A1
US20080313994A1 US11/918,926 US91892606A US2008313994A1 US 20080313994 A1 US20080313994 A1 US 20080313994A1 US 91892606 A US91892606 A US 91892606A US 2008313994 A1 US2008313994 A1 US 2008313994A1
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United States
Prior art keywords
truss
assembly table
nail
struts
nail plates
Prior art date
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Abandoned
Application number
US11/918,926
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English (en)
Inventor
Arvo Nuutinen
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LINEARTEC Oy
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LINEARTEC Oy
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Filing date
Publication date
Application filed by LINEARTEC Oy filed Critical LINEARTEC Oy
Assigned to LINEARTEC OY reassignment LINEARTEC OY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NUUTINEN, ARVO
Publication of US20080313994A1 publication Critical patent/US20080313994A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/15—Machines for driving in nail- plates and spiked fittings
    • B27F7/155—Machines for driving in nail- plates and spiked fittings for nail plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/15—Machines for driving in nail- plates and spiked fittings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/17—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with non-parallel upper and lower edges, e.g. roof trusses

Definitions

  • the invention refers to a method defined in the preamble of claim 1 for the manufacture of a nail plate truss. According to the preamble of claim 7 , the invention also relates to an apparatus for manufacturing the nail plate truss.
  • roof trusses and other corresponding nail plate trusses usually used in construction includes different steps of work. Wooden struts for the truss, cut to size and machined to have desired form, are traditionally laid on the assembly table in an order required by the final structure, and in contact with each other. Subsequently, the parts are joined together by nail plates pressed into their upper surface, connecting the parts together. Next, the nail plate truss is turned upside down for connecting the nail plates to the node joints of the struts on the other side of the truss, too.
  • U.S. Pat. No. 6,712,347 relates to an improved system of automatically movable stops, in which moving parts has been tried to protect against dust and material dislodged from wooden parts. Laying of parts of the truss parts is facilitated and accelerated by different stops and retainers forming a setting on the assembly table, defining the positions for parts of the truss.
  • changing the truss type requires a time-consuming change of setting. Changing the setting can be speeded up to some extent by stops positioned by an automatic control.
  • Parts laid into position are joined together by nail plates to be pressed against the node joints of the struts.
  • a beam press can be used pressing the plates into the struts deep enough for the structure to hold together upon handling.
  • the nail plates are pressed to final depth in this case by a massive roll press.
  • a so-called C-clamp fastened movable to support structures above the assembly table can be used.
  • the object of the invention is to provide alleviation for the drawbacks mentioned above.
  • the invention is especially intended to disclose a novel automatic method and apparatus for manufacturing a nail plate truss without a setting, by means of which method and apparatus trusses having different shape and size can be manufactured effectively and with high accuracy, and which apparatus, compared to prior art apparatuses, is simpler and requires less maintenance.
  • a nail plate truss manufactured using the method and apparatus according to the invention includes first-side nail plates of the truss, second-side nail plates of the truss, and struts joined together by nail plates.
  • a typical nail plate truss is a roof truss carrying the outer roof of a building but, however, nail plate trusses also are used as skeletons for light-structure buildings, as bridge mould and fence structures.
  • a truss to be manufactured at once, naturally, can also be just a part of a larger truss.
  • the structure of the nail plate truss to be manufactured i.e. parts of the truss and their positions relative to each other, are first stored in an electric control system.
  • the nail plates and struts for the truss are brought into their positions required by the truss structure, on a horizontal assembly table, as controlled by an electric control system, using handling members separate from said table.
  • the handling members separate from said table.
  • the assembly table is a concrete level, e.g. of metal, rigid enough for the truss to be assembled thereon.
  • the handling member is not connected directly to the level but is supported to structures outside thereof.
  • the inventive method can comprise steps for
  • Performing the steps described above as controlled by the electric control system means that said steps are performed automatically by means especially provided for each step.
  • handling members can be used operated by precisely positioned electric high-speed linear motors provided with slides for linear motors moving in a magnetic trail, to which the handling members have been fastened.
  • Said pick-up positions may be storages or intermediate positions for parts outside the assembly table or in the area of the table, to which parts needed at each time are brought one by one.
  • both the struts and the nail plates are preferably in precisely defined locations in order to be gripped at given locations, when picking up by automatic handling means. At this, the location of the parts is under control during the entire transfer. If the pick-up position is a storage containing several different parts, the parts are preferably provided with identifications, e.g. bar codes or the like allowing the handling members to identify, for example, the strut needed in each case.
  • identifications e.g. bar codes or the like allowing the handling members to identify, for example, the strut needed in each case.
  • Each one of the parts of the truss can be transported into their positions one by one. Handlings members to be moved, for example, by linear motors, however, can be controlled independently relative to each other, allowing several parts to be transported simultaneously, thus speeding up the assembly. Instead of bringing all the first-side nail plates onto the assembly table before the struts, the truss, naturally, can also be assembled from sections, whereupon just part of the nail plates and struts for the truss is mounted. Node joints denote points of the truss where, typically at different angles, the struts are joined together.
  • Pressing the parts against each other means that the nail portions of the nail plates penetrate into the struts, preferably so deeply that the truss, having also the nail plates on the other side pressed into the struts, will hold together and maintain its form upon transportation.
  • the strut preferably is hold by one handling member at each node joint of the strut. Then, even the node joints of a possibly crooked strut may be precisely forced in place.
  • the node joints of a nail plate truss removed from the assembly table are tightened to have their final strength, by pressing the nail plates into the struts over the entire length of their nail portions.
  • This pressing finally completing the truss can be performed, for example, using a roll press common in the roof truss industry.
  • the assembly table in the area of the node joints, is magnetised, preferably as controlled by an electrical control system, for fastening the first-side nail plates of the nail plate truss thereto.
  • the assembly table itself may be a very simple, merely a planar surface, for example a continuous or even a net-like steel structure.
  • the magnetising means is preferably disposed beneath the assembly table.
  • the strut is pressed against a first-side nail plate present on the assembly table by means of one handling member at each node joint, i.e. at each first-side nail plate to be connected with the respective strut.
  • Concentrating the pressure specifically on the nail plate is important because, when pressing a longish bending strut at another location, the nail plate will necessarily not be pressed deep enough into the strut. It also is possible to realise pressing by a single rigid pressing organ extending across the entire length of the strut.
  • the strut and/or the nail plate on the other side of the truss can also be vibrated when pressing the strut against the first-side nail plate, and/or the second-side nail plate into the strut.
  • a smaller force can be applied when pressing, or alternatively, the nail plates will be pressed deeper into the struts by using the same force.
  • the nail plates may be pressed in this way up to the base, that is, corresponding to the entire length of their nail portions, with no separate repressing strengthening the nodes being needed.
  • the apparatus for manufacturing the nail plate truss without setting includes an electric control system in which the structure of the truss, and the positions of its parts can be stored.
  • the control system may include, for example, both a computer and software installed therein, and data transfer connections between the computer and the apparatuses controlled by it.
  • the control system allows the nail plate trusses to be manufactured automatically, without manual working steps, thus contributing to the effectiveness of the manufacture, and decreasing the production costs.
  • the accuracy also is improved as human errors, for example, in measuring the positions, are eliminated.
  • Such a control system also can be integrated as a part of the remaining production control system of the factory, allowing the apparatus to be operated centrally as a part of the controlled production line.
  • the apparatus also includes a horizontal, fixed and continuous assembly table for assembling the nail plate truss as supported thereon.
  • Fixed and continuous means that the assembly table is substantially continuous, and does not contain any partial levels movable relative to each other.
  • the assembly table can merely be, for example, a continuous or net-like level of steel without any prior art stops movable along the surface plane.
  • the apparatus preferably includes fasteners controlled by the electrical control system, for fastening the first-side nail plates to the assembly table. By means of the fasteners, the first-side nail plates and, thus the entire truss structure, can be maintained in given positions during the assembly. By maintaining the parts in position, the accuracy is ensured during assembly of parts of the truss, accomplished on the basis of data stored in the electric control system.
  • the apparatus comprises handling members separate from the assembly table and supported thereabove, controllable by the electric control system, including gripping means for gripping the nail plate and the strut, as well as pressure members for pressing the struts and the nail plates against each other.
  • the apparatus comprises electrical transfer means controlled by the electrical control system, allowing the transfer means to be moved above the assembly table, and positioning the same.
  • the movable handling members can be used for fetching the truss parts from their pick-up positions, and bringing them precisely into their positions on the assembly table required by the truss structure, or on nail plates or struts already present thereon.
  • the nail plates and struts can be pressed against each other, and finally, the truss thus assembled can be removed further away from the assembly table.
  • the fasteners are magnetising means for magnetising the assembly table in the area of the node joints.
  • the magnetising means may include electromagnets which, when appropriately electrically controlled, allow the magnetising to be quickly switched on and off.
  • permanent magnets arranged, for example, to be swivelling may be used which, upon swivelling relative to the assembly table, allow the assembly table to be magnetised and demagnetised.
  • the gripping means include opposed gripping members movable relative to each other, for gripping the nail plate or the strut by pressing it between the gripping members.
  • the gripping members may be for example vertical surfaces, or grab-like members hinged to be swivelled against each other.
  • the gripping members may be arranged suitable for bringing in an evasion position one by one. By bringing one of the gripping members in the evasion position, a strut may be contacted with another strut while, however, supporting it near to the contact point of the struts by another gripping member.
  • the gripping means can comprise negative pressure means for gripping the strut by means of negative pressure. This is advantageous, for example, when tightening the grip in the case described above, in which one of the gripping members has been brought into the evasion position.
  • negative pressure means for gripping the strut by means of negative pressure.
  • the gripping means may further comprise magnetic members for gripping the nail plates.
  • the magnetic means may be useful, for example, when fetching a nail plate from its pick-up position between other nail plates, when there is no place for the gripping means to be used. Gripping nail plates of steel also can be accomplished merely by magnetic means without the use of other gripping means.
  • the pressing means preferably comprise a support surface, and a drive for pressing the support surface towards the assembly table so as to press the nail plate and the strut against each other.
  • a support surface it is useful to have at least the size of the nail plates, for allowing the nail plates to be pressed against the struts uniformly over their entire area.
  • the support surface may be, for example, a continuous or grid-like steel surface.
  • the drive may be, for instance, a hydraulic cylinder or another corresponding device, allowing an adequate pressure, preferably at least 15 to 20 tons, to be applied against the strut or the second-side nail plate.
  • the handling means also may comprise vibrating means for vibrating the support surface, so as to increase the effectiveness while pressing the nail plate and the strut against each other.
  • the transfer means first include linear guides arranged above the assembly table, substantially parallel thereto, carrying the handling members for transferring the handling members along the first linear guides.
  • the transfer means comprise second linear guides supported above the assembly table, for example, to the frame of the apparatus, carrying the first linear guides, and arranged perpendicularly thereto, likewise disposed substantially parallel to the assembly table for transferring the first linear guides therealong.
  • the linear guides extend preferably over the entire handling line and so far therebeyond that fetching parts from pick-up positions outside the assembly table, and transfer of the truss away from the assembly table is enabled.
  • the handling member also is arranged to be horizontally movable, transversely in relation to the first linear guide carrying it.
  • This allows moving and assembling of the struts also parallel to the first linear guide, by holding the strut with the handling members of the first linear guides.
  • the transfer means also comprise drive means, for example linear electric motors or other drive means capable of achieving sufficient speed and positioning precision.
  • the transfer means preferably include a lifting device for transferring the handling member perpendicularly in relation to the assembly table, i.e. vertically, for lifting truss parts from their pick-up positions, for transferring them into given positions above the assembly table, and for lowering them onto the assembly table or near it.
  • the transferring means likewise comprise preferably an rotational device for rotating the handling member about its vertical axis allowing the parts to be positioned at the necessary angles.
  • the nail plate truss is manufactured without turning upside down known from prior art, for fastening the second-side nail plates. This eliminates the risk for truss to be distorted during turning. Neither are complicated and failure-prone to turning means needed known from prior art apparatuses. Unlike the stops according to prior art, movable in the assembly table, the apparatus is not sensitive to problems caused by wooden material loosening from the trusses, and other impurities, as the assembly table may be very simple, for example, merely a level of steel.
  • FIG. 1 shows schematically a method according to the invention
  • FIG. 2 a , 2 b and 2 c show an embodiment of the invention
  • FIG. 3 shows a perspective view on the structure of an inventive apparatus
  • the truss structure, as well as the position information of parts thereof are stored in an electric control system allowing, in the control of which the truss parts are fetched from their pick-up positions by handling members movable above the assembly table, for example, by electric linear motors, transporting them into their positions on the assembly table or thereabove, required by the truss structure, and assembling them using the same handling members by pressing the struts and nail plates against each other by the handling members.
  • the first-side nail plates are fastened to the assembly table by magnetising it in the area of the node joints.
  • the truss is removed from the assembly table, and tightened to final strength by pressing the nail plates into the struts over the entire length of their nail portions, for example, utilising a roll press traversing over the truss.
  • FIG. 2 a , 2 b and 2 c mounting of strut 4 a with its lateral face contacting another parallel strut 4 b , is illustrated.
  • the strut 4 a is first brought horizontally to a distance from the second strut 4 b and, as indicated by the arrow in FIG. 2 a , lowered to be partially flush therewith, after which it is laterally contacted with the other strut 4 b .
  • FIG. 2 the strut 4 a has thus been contacted with the other strut 4 b .
  • the gripping members 13 of the handling member has been brought in evasion position.
  • the grip has preferably been tightened by negative pressure created by negative pressure means arranged in the handling member.
  • FIG. 2 c the last stage is shown with the strut 4 a being pressed, for example, by means of a hydraulic drive 15 through a support surface 14 against a nail plate 3 on the assembly table.
  • an auxiliary gripping device 21 which can be, for example, a negative pressure arrangement for gripping truss parts by means of negative pressure, or a magnetic device for gripping the nail plates by means of magnetism.
  • the apparatus 1 in FIG. 3 includes a substantially horizontal assembly table 5 shown partly in sectional view for the assembly of nail plate trusses 2 thereon and supported thereon.
  • the assembly table 5 consists of two layers the upper one being a continuous upper plane 6 of steel. Therebelow an approximately 40 to 50 mm thick lower steel level 7 is disposed having holes 8 with given spacing, in which electromagnets 9 are disposed.
  • electromagnets 9 are disposed.
  • the electromagnets 9 are preferably arranged to be switched on separately. Hence, during the manufacture of each truss 2 , it is sufficient to use electromagnets 9 disposed near the node joints only.
  • first linear guides 10 Support the handling members 11 allowing the nail plate truss 2 , the nail plates 3 and the struts 4 to be transported and assembled.
  • the handling members 11 are arranged to be movable parallel to the assembly level 5 along first linear guides 10 , and transversely thereto as well, for raising and lowering them vertically and turning them about their vertical axis. The latter property is needed for assembling the struts and nail plates on the assembly at angles required by the truss structure. Said transverse movement enables transferring and assembly of the struts parallel to the first linear guides by using handling members of two adjacent first linear guides transferred in the direction of the first linear guides so as to be aligned.
  • the first linear guides 10 again have been arranged to be movable along second linear 12 guides parallel to the assembly table, supporting them, arranged perpendicularly thereto, which have been fastened to the frame of the apparatus 1 (not shown in the figure).
  • the linear guides 10 , 12 extend beyond the assembly table 5 for picking up struts 4 and nail plates 3 by handling members 11 from their pick-up positions 19 outside the assembly table, only one of which is indicated in the figure and, for removing the nail plate truss 2 from the assembly table 5 .
  • the movement of the handling members along the first linear guides, and the movement of the first linear guides along the second linear guides is accomplished by electric linear motors, the moving portion 16 of one of them being shown in the figure.
  • the handling member has a lifting and rotating mechanism 17 , 18 .
  • the handling members 11 comprise gripping means 13 for gripping struts 4 and nail plates 3 by clamping them between the gripping means.
  • the handling members 11 also comprise a support surface 14 for pressing the struts 4 and the nail plates 3 against each other.
  • the apparatus 1 also includes an electric control system 20 in which the structure of the truss 2 to be manufactured, i.e. the parts 3 and 4 thereof, and their positions can be stored.
  • the data transfer connection between the control system and the other parts is not shown in the figure.
  • the electric control system can be connected with the production control system of the entire plant allowing the apparatus 1 to be used as a part of the centrally controlled production line.
  • FIG. 3 a step in manufacturing a simple imaginary nail plate truss 2 also is shown.
  • the truss 2 consists of three struts 4 and nail plates 3 joining them together.
  • the struts 4 forming the edges of the truss 2 have already been connected with each other by a nail plate extending over their node joint, in the figure invisible under the struts.
  • Two other nail plates 3 are on the assembly table 5 partially under the two edge struts allowing a third strut to be connected between the edge struts by these nail plates.
  • the third strut has been gripped by two handling members 11 for bringing the strut horizontally into position, in contact with the two other struts and, by means of the support surface of the handling member 11 , pressing them against the nail plates 14 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forests & Forestry (AREA)
US11/918,926 2005-04-22 2006-04-18 Method and Apparatus For Manufactring a Nail Plate Truss Without Setting Abandoned US20080313994A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20050422A FI20050422L (fi) 2005-04-22 2005-04-22 Menetelmä ja laitteisto naulalevyristikoiden valmistamiseksi
FI20050422 2005-04-22
PCT/FI2006/000120 WO2006111606A1 (fr) 2005-04-22 2006-04-18 Procede et appareil pour fabriquer un treillis de plaques clouees sans reglage

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US20080313994A1 true US20080313994A1 (en) 2008-12-25

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US11/918,926 Abandoned US20080313994A1 (en) 2005-04-22 2006-04-18 Method and Apparatus For Manufactring a Nail Plate Truss Without Setting

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US (1) US20080313994A1 (fr)
EP (1) EP1874512A4 (fr)
FI (1) FI20050422L (fr)
WO (1) WO2006111606A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090084468A1 (en) * 2007-09-28 2009-04-02 Mitek Holdings, Inc. Automated truss assembly jig setting system
US20100030363A1 (en) * 2008-07-31 2010-02-04 Mcadoo David L Apparatus, method and computer program product for pre-plating truss members
CN116620920A (zh) * 2023-07-19 2023-08-22 常州力拓塑胶有限公司 一种pvc压延膜生产用包装设备及方法

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI118419B (fi) * 2005-06-23 2007-11-15 Matti Turulin Menetelmä ja järjestelmä kattoristikoiden tai sentapaisten rakenteiden valmistamiseksi
US8478436B2 (en) * 2008-07-31 2013-07-02 Illinois Tool Works Inc. Apparatus, method and computer program product for providing automated truss assembly
FI128892B (fi) 2018-11-13 2021-02-26 Mt Suunnittelu Oy Järjestelmä kattoristikoiden tai sentapaisten rakenteiden valmistamiseksi

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US6651306B1 (en) * 1999-07-23 2003-11-25 Mitek Holdings, Inc. Apparatus and method for fabricating flat trusses
US20050011375A1 (en) * 2003-07-02 2005-01-20 Donohue Thomas Joseph Truss manufacturing apparatus

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US4047282A (en) * 1972-12-20 1977-09-13 Automated Building Components, Inc. Method of joining wooden members
US4024809A (en) * 1975-10-14 1977-05-24 Moehlenpah Walter George Apparatus for fabricating wood structures
US4005520A (en) * 1976-03-09 1977-02-01 Sanford Arthur C Frame structure fabricating system
US4379426A (en) * 1981-09-18 1983-04-12 Moehlenpah Industries, Inc. Truss-fabricating machine
US6651306B1 (en) * 1999-07-23 2003-11-25 Mitek Holdings, Inc. Apparatus and method for fabricating flat trusses
US20050011375A1 (en) * 2003-07-02 2005-01-20 Donohue Thomas Joseph Truss manufacturing apparatus
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090084468A1 (en) * 2007-09-28 2009-04-02 Mitek Holdings, Inc. Automated truss assembly jig setting system
US8244392B2 (en) * 2007-09-28 2012-08-14 Mitek Holdings, Inc. Automated truss assembly jig setting system
US20100030363A1 (en) * 2008-07-31 2010-02-04 Mcadoo David L Apparatus, method and computer program product for pre-plating truss members
US8818547B2 (en) * 2008-07-31 2014-08-26 Illinois Tool Works Inc. Apparatus for pre-plating truss members
CN116620920A (zh) * 2023-07-19 2023-08-22 常州力拓塑胶有限公司 一种pvc压延膜生产用包装设备及方法

Also Published As

Publication number Publication date
EP1874512A4 (fr) 2008-11-12
FI20050422A0 (fi) 2005-04-22
FI20050422L (fi) 2006-10-23
EP1874512A1 (fr) 2008-01-09
WO2006111606A1 (fr) 2006-10-26

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