US3908259A - Cambering attachment for truss assembly jig using canted roller press - Google Patents

Cambering attachment for truss assembly jig using canted roller press Download PDF

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Publication number
US3908259A
US3908259A US546021*A US54602175A US3908259A US 3908259 A US3908259 A US 3908259A US 54602175 A US54602175 A US 54602175A US 3908259 A US3908259 A US 3908259A
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United States
Prior art keywords
truss
rolls
members
support surface
roll means
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US546021*A
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English (en)
Inventor
James D Adams
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ITW TRUSWAL Corp A CORP OF
PROVIDENT BANK
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Individual
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Priority to US546021*A priority Critical patent/US3908259A/en
Priority to CA233,174A priority patent/CA1041279A/fr
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Assigned to HOUSEHOLD COMMERCIAL FINANCIAL SERVICES, INC., 2700 SANDERS ROAD, PROSPECT HEIGHTS, IL 60070 reassignment HOUSEHOLD COMMERCIAL FINANCIAL SERVICES, INC., 2700 SANDERS ROAD, PROSPECT HEIGHTS, IL 60070 SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRUSWAL SYSTEMS CORPORATION
Assigned to ITW TRUSWAL CORPORATION, A CORP. OF DE reassignment ITW TRUSWAL CORPORATION, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: TRUSWAL SYSTEMS CORPORATION
Assigned to TRUSWAL SYSTEMS CORPORATION, A CORP. OF DE reassignment TRUSWAL SYSTEMS CORPORATION, A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ITW TRUSWAL CORPORATION
Assigned to HOUSEHOLD COMMERCIAL FINANCIAL SERVICES, INC. reassignment HOUSEHOLD COMMERCIAL FINANCIAL SERVICES, INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRUSWAL SYSTEMS CORPORATION, (A DE. CORP.)
Anticipated expiration legal-status Critical
Assigned to PROVIDENT BANK, THE reassignment PROVIDENT BANK, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TRUSWAL SYSTEMS CORPORATION
Expired - Lifetime legal-status Critical Current

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    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00—Presses
    • Y10S100/913—Truss presses
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49833—Punching, piercing or reaming part by surface of second part

Definitions

  • ABSTRACT Joist trusses having generally parallel upper and lower chord members. are necessarily manufactured with a camber and preferably upon an assembly jig having a longitudinally disposed, movable, endless belt-like support surface for supporting precut wooden members arranged into the shape of a joist truss. Clamping devices. mounted upon the support surface hold the precut members in place and spiked. metal gusset plates are placed at opposite sides of each joint of the truss. Two pairs of opposing. transversely-disposed rolls. arranged as roller presses, are located at one end of the support surface.
  • first pair of rolls being positioned to receive both the support surface and the assembled truss thereon, so as to partially impale the gusset plate spikes into the members.
  • the second pair of rolls are positioned beyond the support surface to tightly press the gusset plates against the sides of the truss as it passes through these rollers.
  • the second pair of rolls are skewed or angled from a normal transverse axial position to impart a predetermined camber into a truss as it moves through these rolls.
  • the present invention relates to assembly jigs for forming assembled precut wood members into a structural joist truss, and more particularly to the manufacture of joist trusses upon such assembly jigs.
  • the primary object of the present invention is to provide, in a truss assembly jig, a novel. improved and simplified mode of imparting a predetermined and accurate camber to a joist truss as it moves through the manufacturing jig.
  • a joist truss may be defined as having generally straight, parallel upper and lower chords with a zigzag array of web or diagonal members between these chords, and including perpendicular ends. Such trusses are comparatively shallow and the ratio of height to span may be as small as 1 to 20, in contrast with other types of trusses where a desirable height-to-span ratio is more nearly 1 to or more. Accordingly, joist trusses are used extensively for supporting floor and roof decks.
  • One such an assembly jig generally comprises a movable, table-like support surface, preferably an endless belted structure, whereon the upper and lower truss chords and the web members are positioned and held by clamps in the form of the truss.
  • Gusset plates (spiked, metal plates) are then placed at each joint, and thereafter, movement of the support surface passes the preassembled truss through upright pairs of opposing rolls arranged as a roller press, to press the spikes of the gusset plates into the wood.
  • a roller press Preferably (and the type of apparatus with which the present invention is concerned), two sets of rolls are used.
  • the first roller press set is at, and above and below the movable surface and functions to partially impale the gusset plate spikes into the wooden members to hold the truss together.
  • the second roller press set is beyond the movable surface and functions to press the gusset plates in place tightly against the sides of the truss and produce a finished truss.
  • the present invention was conceived and developed with such considerations in view, and the invention comprises, in essence, a truss assembly jig having a movable support surface with clamps thereon to hold precut wooden members in the form of a joist truss and with spiked gusset plates at the truss joints, two pairs of opposing rolls (forming two roller presses) in tandem at the discharge end of the support surface to receive one or two trusses and to press the gusset plate spikes into the wooden members in a two-step, single-pass operation, and an arrangement where the second pair of rolls is skewed, or angled slightly from a normal straight line traverse, axial alignment with respect to the movable surface, to impart a predetermined camber to the truss.
  • the second, angled roller press set would not only impart a camber to the truss when it is laid out in a straight, longitudinal alignment upon the support surface, but also, it would cause the camber to be predictable and consistent for a large number of similar size of trusses being manufactured.
  • another object of the invention is to provide a truss assembly jig which is capable of manufacturing cambered joist trusses having a selected, specified camber which will be consistently the same in each of a large number of joist trusses manufactured in the jig, and minimize the number of trusses which have to be rejected.
  • Another object of the invention is to provide, in a truss assembly jig, an adjustably angled roller press for forming a predetermined camber in a joist truss manufactured therein which does not require any significant modifications to a double roller press, truss assembly jig, nor require any extra steps in the formation of a predetermined, cambered truss manufactured therein.
  • Another object of the invention is to provide a modified truss assembly jig to produce, accurately and consistently, camber in joist trusses manufactured therein which is simple, economical, reliable, rugged and durable.
  • FIG. 1 is a plan view of a truss assembly jig of a type which manufactures two trusses at a time, and which is arranged with two sets of oppositely-skewed discharge rolls to impart camber to trusses manufactured on the jig, and with trusses being illustrated as passing through the rolls.
  • FIG. 2 is a side elevation view of the discharge end of the truss assembly jig as from the indicated line 22 at FIG. 1, but on an enlarged scale.
  • FIG. 3 is an enlarged, plan view of the discharge end of the truss viewed at FIG. 2, but without trusses in the apparatus.
  • FIG. 4 is a diagrammatic view of the two roller press arrangements and of a truss passing through the rolls to permit the first pair of rolls to partially impale the gusset plate spikes into the truss and the second pair to press the gusset plates against the truss members to complete the truss.
  • FIG. 5 is a fragmentary portion of a sectional plan view as taken from the indicated line 5-5 at FIG. 2, but with some parts being removed to show constructions otherwise hidden from view.
  • FIG. 6 is a fragmentary sectional detail as taken from the indicated line 6-6 at FIG. 5.
  • FIG. 1 illustrates a truss assembly jig of a type whereon either one or two joist trusses A and B may be assembled at one time, as upon an endless, assembly belt 21.
  • This belt 21 constitutes the movable support surface for carrying preassembled trusses and for moving the trusses through rolls arranged in upright pairs as roller presses. These rolls constitute a double roller press assembly 22 to press spiked gussets G into the preassembled truss members to complete a truss as it moves through the roller press assembly, all as hereinafter further described.
  • the assembly belt 21 is essentially a conventional unit which may be constructed as a continuous web or as a longitudinally extended array of slats 23 mounted on chains 24, as indicated at FIGS. 1 and 2.
  • the chains of this assembly belt 21 are extended about end rolls or sprockets 25 which, in turn, are mounted on shafts 26.
  • the shafts are carried in bearings 27 supported in an elongated structural framework 28 consisting of longitudinal members, transverse members and uprights in any suitable, essentially conventional organization.
  • the belt 21 will include conventional components, not shown, such as take-up adjusting devices on the bearings 27. Suitable restraining clamps 30 will be provided upon the surface of belt 21 as spaced arrays extending along the longitudinal reach of the upper surface of the belt to hold the truss components in place when they are preassembled and before the truss components are fastened together by the gusset plates G.
  • the roll assembly 22 includes a first roller press including a pair of opposing, upright rolls 3] and 31' which extend across the belt 21 near its discharge end.
  • the roll assembly 22 also includes lefthand and righthand roller press assemblies including pairs of opposing, upright, finishing rolls 32R and 32R and 32L and 32L located a short distance beyond the discharge end of the belt 21.
  • These rolls may be carried in a common structural framework 33 consisting of longitudinal, transverse and upright members at both sides of the rolls in any suitable, convenient arrangement.
  • the framework 33 is integrated with and may be a continuation of the framework 28 of the belt, heretofore described.
  • This framework includes uprights at the rolls 31 and 31' and shelf members 33 in the uprights at each side of each roll 31 and 31' to carry bearings 34 to support the shafts of the rolls.
  • the rolls 32R-32R and 32L-32L are carried in upright yokes 35R and 35L, respectively, which permit them to change align merit as hereinafter described and the upright members of these yokes include shelf members 35' to carry bearings 36 to support the shafts of the rolls.
  • the first set of rolls 31 and 31' located near the discharge end of the assembly belt 21, are positioned with the upper roll 31 being spaced above the surface of the assembly belt to permit truss components with gusset plates preassembled upon the assembly belt 21 to pass underneath this roll.
  • the lower roll 31 is-underneath this belt 21 and supports the belt.
  • the upper roll 31 is driven in synchronism with the movement of the belt 21 by a suitable motor 37 which is preferably an electrical-motor, gearreducer combination.
  • the lower roll 31, may be an idler (also may be driven) and functions to support the assembly belt against pressures imposed by the upper roll whenever a truss passes underneath it.
  • the function of the first roller press set, including rolls 31 and 31', is to partially impale gusset plate spikes into the wooden truss components.
  • the gussets G which fasten the truss members together, are flat metal plates 38. Each plate has spikes 39 outstanding from one face and preferably, these spikes 39 are formed integrally with the plate 38 by punching and bending operations, cutting the spikes out of the surface of the plates.
  • gusset plates are placed on both faces of the truss members at each joint when the truss members are preassembled on the belt 21 as best indicated at FIG. 4.
  • the restraining clamps 30 upstand from the surface of the assembly belt 21 a distance sufficient to hold the wooden truss members when they are held above the belt surface by gusset plates underneath them. These clamps are arranged in straight lines, spaced apart to hold a truss of the desired width.
  • the spikes 39 on a gusset plate may be as much as 1% inches long, and hence it is impractical to completely drive these spikes into the timber components by a single pair of rolls. Accordingly, the gusset plate spikes are driven into the wooden components approximately half way as they pass through the first pair of rolls 31 and 31. They are subsequently completely driven in place by a pair of finishing rolls 32R and 32R or 32L and 32L.
  • the pairs of finishing rolls 32R and 32R and 32L and 32L are thus positioned to receive a truss having its components held together by partially impaled spikes of the gusset plates 38.
  • the rolls of each pair are spaced apart a distance sufficient to tightly press these gussetplates against the sides of the truss members as the truss moves through the rolls.
  • These finishing rolls may be mounted in a rigid manner in the yoke frames, 35R and 35L as illustrated, or they may be spring mounted in any suitable manner to yield a small amount whenever a truss passes through them, to allow for the gusset plate thickness and other variations in the thickness of the members.
  • Each upper roll 32R and 32L is driven in synchronism with the movement of a truss moving from the first set of rolls 31 and 31', and from the belt 21, as by a suitable motor 40R and 40L, respectively, and each motor is preferably an electricalmotor, gear-reducer combination.
  • the lower rolls 32R and 32L are idlers.
  • each pair of finishing rolls 32R-32R' and 32L-32L' is skewed or angled to place the roll axes at a small angle from a normal transverse alignment with respect to the longitudinal axis of the apparatus. Such an angle may be from 2 to from the normal to the longitudinal axis of the apparatus.
  • This angling of the rolls produces a predetermined camber in trusses being formed in the apparatus which is surprisingly consistent in the trusses.
  • righthand and lefthand rolls are used to manufacture two trusses at a time, and each pair of rolls is skewed to turn a truss passing therethrough outwardly and away from the longitudinal axis of the apparatus, as best illustrated at FIG. 1, thus preventing any interference of one truss with another.
  • each pair of finishing rolls 32L-32L and 32R-32R is such as to extend to the longitudinal central axis of the apparatus. and to avoid a problem of overlap, the pair of rolls 32R32R is placed ahead of the pair of rolls 32L32l.. and closer to the end of the belt 21, as illustrated. It was ascertained that this difference with respect to the distance from the end of the belt 21 will not significantly affect the results of the trussforming and camber-producing operations and thus. the offsetting roll pattern is provided as a matter of convenience.
  • the framework 33 thus includes a longitudinally spaced outward pad 43R and an inward pad 44R and 44L whereon the sides of the base 42 of the yoke 35R are mounted and corresponding longitudinal outward and inward pads 43L and 44L whereon the sides of the base of the yoke 35L are mounted, While this yoke may be formed in various ways, a preferred structure is illustrated at FIG. 5 where the base 42 of each yoke combines an outward side crossarm 45 and an inner crossarm 46 which are spaced apart by a transverse center section 47 in the general form of an H structure.
  • each yoke upstand from these crossarms 45 and 46.
  • the crossarms 45 and 46 rest upon their respective pads 43R and 43L and 44R and 44L.
  • Each end of each crossarm 45 and 46 is formed with ears 45 and 46, respectively, for receiving tiedown bolts to secure the yokes 35R and 35L to the framework pads.
  • each yoke base is pivotally connected to its pad 43R or 43L as by a pivot bolt 48 at the center of the crossarm.
  • the inward crossarm 46 of each yoke is slidably carried upon its pad 44R or 44L by adjustment bolts 49 fitted in the ears 46 at each side of the crossarm.
  • the bolts pass through holes in these ears and into radial slots 50 in the respective pads 44R or 44L. These slots are centered on the axis of the opposing bolt 48.
  • tie down bolts 51 may be provided in the ears 45' of each outward crossarm 45 and these bolts are fitted in slots 52 in the ears and in the outward pads 43R and 43L which are also centered on the axis of the respective bolts 48.
  • this apparatus is manifest from the foregoing description. Whenever a pair of trusses, or a single truss for that matter, is to be formed in the apparatus, the finishing rolls 32R-32R and 32L-32L' are skewed from a longitudinal axial alignment of the apparatus by shifting the base of the yokes 35R and 35L about the pivot bolt 48. the other bolts 49 and 51 are then tightened to secure the rolls in place at a selected angle of skew. Next, a truss is formed upon the belt 21 in a conventional manner and is allowed to move from the belt through the rolls 31 to partially impale gussets into the truss and thereafter, to move to the skewed, or angled, finishing roll.
  • a truss assembly jig for forming a timber truss having parallel upper and lower chords and diagonal struts between the chords, with the truss members, the chords and the struts being fastened together by spiked gusset plates, the combination including:
  • a pair of first roll means near the discharge end of the support surface including a roll spaced above the surface a distance sufficient to partially impale the gusset plates into the wood truss members as the truss moves thereunder towards the discharge end of the surface;
  • finishing roll means a short distance beyond the discharge end of the surface to receive a truss as it moves from the support surface, said finishing roll means having rolls spaced apart to press the gusset plates into and against the sides of the truss members to finish the truss;
  • finishing roll means is skewed at an angle from the normal transverse axial alignment with respect to the longitudinal axis of the support surface whereby to impart a camber to a truss passing therethrough which isinitially placed in longitudinal alignment upon the support surface.
  • the skew angle is from 2 to 10.
  • the said finishing roll means is carried in an adjustable frame means adapted to permit the same to be rotatably shifted to provide the aforesaid skew po sition.
  • the said finishing roll means is carried in a yoke-like frame, the base of which is rotatably shiftable whereby to permit the rolls to be set at a selected skew angle.
  • a second finishing roll means with one finishing roll means being at one side of the apparatus. and the other finishing roll means being at the other side of the apparatus, whereby to permit the simultaneous formation'of a pair of joist trusses on the apparatus.
  • the second finishing roll means is longitudinally offset from the first to permit each roll means to extend to the center of the apparatus.
  • a wooden joist truss including longitudinal upper and lower wooden chords with wooden cross-bracing members, with a predetermined camber, which includes assembling wooden components, an assembly in the form of a joist truss with the upper: and lower chord members in straight and parallel arrangement, placing toothed, metal gusset plates on each side of each joist, moving such assembly through a first roller press set at a normal angle to the longitudin'al axis of the truss to partially embed the teeth, of the gusset plates in the wooden members.

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US546021*A 1975-01-31 1975-01-31 Cambering attachment for truss assembly jig using canted roller press Expired - Lifetime US3908259A (en)

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US546021*A US3908259A (en) 1975-01-31 1975-01-31 Cambering attachment for truss assembly jig using canted roller press
CA233,174A CA1041279A (fr) 1975-01-31 1975-08-07 Accessoire de cintrage sur gabarit de montage de fermes muni d'une presse a rouleaux inclines

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154164A (en) * 1978-04-24 1979-05-15 Hammond Daniel B Wooden truss fabricating jig
US4287822A (en) * 1980-01-08 1981-09-08 Truswal Systems Corporation Truss assembly machine
US4341153A (en) * 1980-01-08 1982-07-27 Truswal Systems Corp. Splicing and truss assembly apparatus and methods
US4514901A (en) * 1983-05-23 1985-05-07 Associated Truss Company Method and apparatus for attaching mounting plates
US5111861A (en) * 1988-09-13 1992-05-12 Truswal Systems Corporation Apparatus for cambering wood trusses
US20100030363A1 (en) * 2008-07-31 2010-02-04 Mcadoo David L Apparatus, method and computer program product for pre-plating truss members
CN114211782A (zh) * 2021-12-17 2022-03-22 江西洪都航空工业集团有限责任公司 一种帽型长桁整体定位装置及方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100301A (en) * 1960-09-12 1963-08-13 William H Black Method and apparatus for prefabricating prestressed monoplanar trusses
US3667379A (en) * 1971-01-11 1972-06-06 Templin Associates Inc Apparatus for prefabricating wood structures
US3749391A (en) * 1971-01-11 1973-07-31 Tct Engineering Inc Adjustable fixture means for maintaining wooden truss members in proper position during fabrication of a truss
US3855917A (en) * 1973-10-15 1974-12-24 Dayton Aircraft Prod Inc Truss plate press
US3868898A (en) * 1973-02-14 1975-03-04 Sanford Arthur C Rolling truss joint connector plates

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100301A (en) * 1960-09-12 1963-08-13 William H Black Method and apparatus for prefabricating prestressed monoplanar trusses
US3667379A (en) * 1971-01-11 1972-06-06 Templin Associates Inc Apparatus for prefabricating wood structures
US3749391A (en) * 1971-01-11 1973-07-31 Tct Engineering Inc Adjustable fixture means for maintaining wooden truss members in proper position during fabrication of a truss
US3868898A (en) * 1973-02-14 1975-03-04 Sanford Arthur C Rolling truss joint connector plates
US3855917A (en) * 1973-10-15 1974-12-24 Dayton Aircraft Prod Inc Truss plate press

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4154164A (en) * 1978-04-24 1979-05-15 Hammond Daniel B Wooden truss fabricating jig
US4287822A (en) * 1980-01-08 1981-09-08 Truswal Systems Corporation Truss assembly machine
US4341153A (en) * 1980-01-08 1982-07-27 Truswal Systems Corp. Splicing and truss assembly apparatus and methods
US4514901A (en) * 1983-05-23 1985-05-07 Associated Truss Company Method and apparatus for attaching mounting plates
US5111861A (en) * 1988-09-13 1992-05-12 Truswal Systems Corporation Apparatus for cambering wood trusses
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
AU2009203079B2 (en) * 2008-07-31 2016-02-04 Illinois Tool Works Inc. Apparatus, method and computer program product for pre-plating truss members
CN114211782A (zh) * 2021-12-17 2022-03-22 江西洪都航空工业集团有限责任公司 一种帽型长桁整体定位装置及方法
CN114211782B (zh) * 2021-12-17 2023-10-03 江西洪都航空工业集团有限责任公司 一种帽型长桁整体定位装置及方法

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Publication number Publication date
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Effective date: 19961213