US3750562A - Fluid-actuated press - Google Patents

Fluid-actuated press Download PDF

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Publication number
US3750562A
US3750562A US00190724A US3750562DA US3750562A US 3750562 A US3750562 A US 3750562A US 00190724 A US00190724 A US 00190724A US 3750562D A US3750562D A US 3750562DA US 3750562 A US3750562 A US 3750562A
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US
United States
Prior art keywords
press
head
base structure
opposite ends
platen
Prior art date
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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US00190724A
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English (en)
Inventor
J Jureit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gang Nail Systems Inc
Mitek Holdings Inc
Original Assignee
Automated Building Components Inc
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Filing date
Publication date
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Application granted granted Critical
Publication of US3750562A publication Critical patent/US3750562A/en
Assigned to GANG-NAIL SYSTEMS, INC., A FL CORP. reassignment GANG-NAIL SYSTEMS, INC., A FL CORP. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: AUTOMATED BUILDING COMPONENTS, INC.,
Assigned to GANG-NAIL SYSTEMS, INC. reassignment GANG-NAIL SYSTEMS, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: MITEK INDUSTRIES, INC., A CORP. OF MO., (MERGED INTO)
Assigned to MITEK HOLDINGS, INC. reassignment MITEK HOLDINGS, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: MITEK INDUSTRIES, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/007—Means for maintaining the press table, the press platen or the press ram against tilting or deflection
    • 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

Definitions

  • the press includes a base structure carrying a press platen and an upper floating head carrying a press platen, the floating head being movable toward and away from the base.
  • a fluid-actuated cylinder is provided at each end of the press to raise and lower the head.
  • a load transfer assembly interconnects opposite ends of the press and includes a transfer bar pivotally connected at opposite ends to bellcranks at opposite ends of the base. Rods at opposite ends of the press connect between the bellcranks and head.
  • trusses comprise wooden framing members, in most cases, fastened together at their joints by nail plates, for example, of the type disclosed in U.S. Pat. No. 2,877,520 of common assignee herewith.
  • nail plates for example, of the type disclosed in U.S. Pat. No. 2,877,520 of common assignee herewith.
  • a number of methods for applying the nail plates to the butt joints, such as hand nailing, utilizing individual power-operated presses at each joint, etc., have variously proven time-consuming, laborious, expensive, and not susceptible to large-scale automated truss fabrication techniques.
  • Truss fabrication techniques have advanced to the state where power-operated presses for embedding the nail plates into the joints of the wooden frame members are utilized.
  • One such truss fabrication technique provides for the prepositioning of the frame members on a jig table in the pattern of the truss with the connector plates spotted on opposite sides of the joints of such members. Thereafter, the connector plates are pressed into the joints to fasten the frame members together and form a completed truss, panel, or the like. Presses capable of providing the foregoing action are disclosed in U.S. Pat. Nos. 3,079,607 and 3,195,449 of common assignee herewith.
  • Asymmetrical loadings are caused by the differences in location of the joints of the various types and sizes of trusses.
  • those presses which mount fluid-actuated cylinders at their opposite ends for example, the presses disclosed in U.S. Pat. Nos. 3,079,607 and 3,195,449, only the cylinder or the cylinders at one end of the press are generally effective with respect to the eccentric load. Consequently, these presses are limited in capacity when subjected to asymmetrical loadings to substantially the capacity of the cylinder or cylinders at one end of the press.
  • the present invention provides a novel and improved fluid-actuated press which eliminates and/or minimizes problems associated with the foregoing described and other presses and provides a novel press having various advantages in construction and operation as compared with such prior presses.
  • the press hereof is particularly adapted for embedding nail plates into the joints of wooden memers forming trusses, panels, and the like, and wherein asymmetrical loadings are experienced.
  • the present invention provides a press mounted on wheels for movement along tracks.
  • the press includes a lower support structure or base and a floating head carrying an upper press platen slidable with the head for reciprocating movement toward and away from the base.
  • a fluid-actuated cylinder is provided at each end of the press and connects between the base and the head. Suitable guides at opposite ends of the press are also provided.
  • a jig table is supported above the tracks. Wooden frame members are prepositioned on the jig table in the pattern of a truss, panel, or the like, and connector plates are spotted on opposite sides of the joints thereof.
  • the press is then moved along the jig table. Whenever ajoint with the prepositioned nail plates is located between the press platens, the press stops, embeds the nail plates into the joint, and moves on to the next joint.
  • a load transfer apparatus interconnects opposite ends of the press and includes at each end a bellcrank pivotally mounted to the base and a pair of rods pivotally connected at opposite ends to the bellcrank and movable head.
  • a transfer bar interconnects the bellcranks at opposite ends of the press.
  • the force applied by the cylinder at the unloaded or partially loaded end of the press is transferred to the loaded end through the rod, bellcranks, and transfer bar.
  • the rods at the unloaded or partially loaded end of the press lie in compression and rotate the bellcrank to place the transfer bar in compression.
  • the bellcrank at the loaded end of the press is thereby rotated in the opposite direction. Rotation of the latter bellcrank tensions the rods at the loaded end of the press.
  • the net result of this action is to transfer in part the load applied to the head by the cylinder at the unloaded or partially loaded end of the press to the fully loaded end of the press.
  • the capacity of the press is maintained at substantially the sum of the capacities of the individual cylinders at the opposite ends of the press.
  • FIG. 1 is a side elevational view of a press constructed in accordance with the present invention
  • FIG. 2 is a top plan view thereof
  • FIG. 3 is an end elevational view thereof.
  • FIGS. 4 and 5 are fragmentary cross-sectional views taken generally about on lines 4-4 and 5-5, respectively, in FIG. 3.
  • a press generally indicated 10, comprised of a base structure 12 and an upper floating head 14 movable toward and away from the base structure 12.
  • the upper edge of base structure 12 mounts a lower press platen 16 while the lower edge of the moving head 14 carries an upper press platen 18.
  • a pair of horizontal supports 20 underlie the base structure 12 at opposite ends of press 10.
  • a pair of support arms 22 extend from opposite ends of each support 20 and are secured at their upper ends to the upper edge of base structure 12.
  • Each support 20 mounts a pair of wheels.
  • the support 20 at one end of the press mounts a pair of flat wheels 24, while the support member 20 at the opposite end of the press mounts a pair of grooved wheels 26 for engagement along a track.
  • Track 28 comprises an inverted elongated triangularshaped member. Accordingly, press is mounted for movement in a horizontal direction along a predeter mined path for a distance at least as great as the maximum length of the trusses to be fabricated. It will be appreciated that the press hereof may be utilized with the truss fabricating system described and illustrated in copending US. Patent application Ser. No. 867,730, filed Oct. 20, 1969, now Pat. No. 3,603,244, of common assignee herewith, which application is incorporated herein by reference thereto as though fully set forth herein.
  • press 10 is movable longitudinally along the track 28 relative to the jig table, the joints of the various prepositioned members forming the truss, panel, or the like and carried by the jig table, and the connector plates spotted on opposite sides of the joint, with the jig table, truss members, and plates passing between the press platens 16 and 18.
  • the press stops and the movable head 14 presses the connector plates into the joint and then moves away from the completed joint, whereupon the press is again moved to the next joint and the operation is repeated.
  • End plates 30 are carried by the base structure 12 at each of the opposite ends thereof.
  • End plates 30 each carry a pair of vertically spaced guides 32 along opposite sides of the plate, the guides having vertically aligned openings.
  • the floating head 14 also carries an end plate 34 at each of the opposite ends thereof.
  • End plate 34 carries a pair of vertically spaced guides 36 at opposite sides thereof.
  • a pair of guide pins 38 are received within the openings in guides 32 and 36, the guide bars 38 being fixed to one of the upper guides 36. Accordingly, the floating head 14 is mounted for reciprocative vertical movement toward and away from the lower base structure 12.
  • a fluid-actuated cylinder 40 is coupled between base structure 12 and floating head 14 at opposite ends of the press. Particularly, at each end of the press the cylinder 40 is pivotally connected to a lug 42 fixed to the end plate 34 of the floating end 14.
  • piston rod 44 which depends from cylinder 40, terminates in a clevis 46 which is pivotally connected to 2 lug 48 fixed to the end plate 30 of the lower base structure 12. It will thus be appreciated that retraction and extension of piston rod 44 with respect to cylinder 40 respectively lowers and raises the floating head 14 relative to the base structure 12. Suitable fluid circuits, not shown, are provided for actuating the cylinder 40.
  • load transfer apparatus is provided for the purpose of equalizing the loading carried by the cylinder, particularly when the press issubjected to asymmetrical loadings.
  • the full capacity of the cylinders may be ap plied at any point between the press platens, notwithstanding asymmetrical location of the loads along the press.
  • the present invention provides bellcranks 50a and 50b at respective opposite ends of the press and which bellcranks are pivotally mounted to the base structure 12 on respective pins 520 and 52b.
  • Outwardly projecting legs 54a and 54b of bellcranks 50a and 50b are each pivotally connected to the lower ends of a pair of arms 56 by means of a pin 58.
  • the upper ends of arms 56 are pivotally connected to a pair of elements 60 rigidly secured to the head 14. It will thus be appreciated that movement of the head 14 toward and away from the base structure 12 pivots bellcrank 50a in clockwise and counterclockwise directions as illustrated in FIG. 1. Concomitantly, the bellcrank 50b is pivoted in counterclockwise and clockwise directions, respectively.
  • the lower leg 62a of bellcrank 50a connects with a clevis 64a while the upper leg 62b of bellcrank 50b pivotally connects with a clevis 64b.
  • the opposite ends of the clevises 64a and 64b are rigidly secured at opposite ends of a transfer bar 66.
  • Bar 66 comprises a rigid steel tubing which extends between the opposite ends of the press and below the lower press platen 16.
  • rollers 68 which are spring-biased to extend just above the upper face of the lower press platen 16. The rollers tend to maintain the jig table, not shown, spaced from the lower platen 12 to facilitate movement of the press relative to the fixed jig table.
  • a press comprising: a base structure including a press platen, a head including a press platen in opposition to said first mentioned press platen, means connecting said head and said base structure for reciprocating movement of said head relative to said base structure including a fluid actuated cylinder connected between said head and said base structure at each of the opposite ends of said press, and means coupled between opposite ends of said press for transferring a portion of the force applied by the cylinder to said head at one end of said press to the head at the opposite end of said press, said coupling means including a bellcrank at opposite ends of said press, said bellcranks being pivotally carried by said base structure, a transfer bar interconnecting said bellcranks, a rod coupled between said bellcrank and said head at opposite ends of the press, said rods, bellcranks, and transfer bar being arranged such that rotation of one of said bellcranks in response to movement of said head toward said base rotates the other bellcrank in an opposite direction, the rod at one press end being subject to compressive forces and the rod at one press
  • a press comprising: a base structure including a press platen, a head including a press platen in opposition to said first mentioned press platen, means connecting said head and said base structure for reciprocating movement of said head relative to said base structure including a fluid actuated cylinder connected between said head and said base structure at each of the opposite ends of said press, and means coupled be tween opposite ends of said press for transferring a portion of the force applied by the cylinder to said head at one end of said press to the head at the opposite end of said press, said coupling means including a force transfer bar coupled to said base structure and said head such that said bar is subjected alternately to tension and compressive forces in response to loadings concentrated in opposite ends of the press respectively.
  • the press according to claim 2 including a plurality of wheels carried by said base structure for supporting said press, said wheels being located adjacent opposite ends of said press with at least one of said wheels engaging said track whereby said press is mounted for longitudinal movement along said track.
  • said coupling means includes a bell crank at opposite ends of said press, said bell cranks being pivotally carried by said base structure, a rod coupled between said bell crank and said head at opposite ends of the press, said rods, bell cranks, and transfer bar being arranged such that rotation of one of said bell cranks in response to movement of said head toward said base rotates the other of said bell cranks in an opposite direction.
  • a press comprising: a base structure including a press platen, a head including a press platen in opposition to said first mentioned press platen, means connecting said head and said base structure for reciprocating movement of said head relative to said base structure including a fluid actuated cylinder connected between said head and base'structure at each of the opposite ends of said press, means coupled between opposite ends of said press for transferring a portion of the force applied by the cylinder to said head at one end of said press to the head at the opposite end of said press, a plurality of rollers disposed on one side of said base structure and above the press platen carried thereby, and means mounting said rollers for movement below said latter press platen.
  • said coupling means includes a bellcrankat opposite ends of said press, said bellcranks being pivotally carried by said base structure, a transfer bar interconnecting said bellcranks, a rod coupled between said bellcrank and said head at opposite ends of the press, said rods, bellcranks, and transfer bar being arranged such that rotation of one of said bellcranks in response to movement of said'head toward said base rotates the other bellcrank in an opposite direction.
  • said coupling means includes a force transfer bar coupled to said base structure and said head such that said bar is subjected alternately to tension and compressive forces in response to loadings concentrated adjacent opposite ends of the press, respectively.
  • A'press comprising: i V
  • a base structure including a press platen, a head including a press platen in opposition to said first mentioned press platen, means connecting said head and said base structure for reciprocating movement of one of said head and said base structure relative to the other of said head and base structure, a fluid actuated cylinder connected between said'head and said base structure at each of the opposite ends of said press for moving said one of said head and said base structure relative to the other of said head and said base structure, and means coupled between opposite ends of said press for transferring a portion of the force applied by the cylinder to said one of said head and said base structure at one end of said press to the other of said head and said base structure at the opposite end of said press, said coupling means including a force transfer bar coupled to said base structure and said head such that said bar is subjected alternately to tension and compressive forces in response to loadings concentrated adjacent opposite ends of the press, respectively.
  • said coupling means includes a bell crank at opposite ends of said press, said bell cranks being pivotally carried by the other of said head and said base structure, a rod coupled between said bell crank and said one of said head and said base structure at opposite ends of the press, said rods, bell cranks, and transfer bar being arranged such that rotation of one of said bell cranks in response to movement of said one of said head and said base structure toward the other of said head and said base structure rotates the other bell crank in an opposite direction.
  • the press according to claim 9 including a plurality of rollers disposed on one side of said base structure and above the press platen carried thereby, and means mounting said rollers for movement below said latter press platen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Press Drives And Press Lines (AREA)
  • Veneer Processing And Manufacture Of Plywood (AREA)
  • Automatic Assembly (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
US00190724A 1971-10-20 1971-10-20 Fluid-actuated press Expired - Lifetime US3750562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19072471A 1971-10-20 1971-10-20

Publications (1)

Publication Number Publication Date
US3750562A true US3750562A (en) 1973-08-07

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ID=22702501

Family Applications (1)

Application Number Title Priority Date Filing Date
US00190724A Expired - Lifetime US3750562A (en) 1971-10-20 1971-10-20 Fluid-actuated press

Country Status (14)

Country Link
US (1) US3750562A (enrdf_load_stackoverflow)
BG (1) BG19095A3 (enrdf_load_stackoverflow)
CS (1) CS190370B2 (enrdf_load_stackoverflow)
DD (1) DD97601A5 (enrdf_load_stackoverflow)
DK (1) DK146710C (enrdf_load_stackoverflow)
FR (1) FR2157518A5 (enrdf_load_stackoverflow)
GB (1) GB1350033A (enrdf_load_stackoverflow)
HU (1) HU167406B (enrdf_load_stackoverflow)
IL (1) IL39117A (enrdf_load_stackoverflow)
NO (1) NO142162C (enrdf_load_stackoverflow)
PL (1) PL82054B1 (enrdf_load_stackoverflow)
RO (1) RO60564A (enrdf_load_stackoverflow)
SE (1) SE392061B (enrdf_load_stackoverflow)
SU (1) SU482938A3 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104962A (en) * 1977-03-14 1978-08-08 Automabed Building Components, Inc. Press
US4745856A (en) * 1987-01-29 1988-05-24 Bakker David P Hydraulic refuse compactor with channel guided compactor blade
US5252053A (en) * 1991-02-26 1993-10-12 Boschman Technologies B.V. Apparatus for closing a mold

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224968A (en) * 1935-05-14 1940-12-17 Klocke William Hydromechanical press
US2446823A (en) * 1945-10-18 1948-08-10 Farrel Birmingham Co Inc Equalizer for platen presses or the like
US3195449A (en) * 1963-05-15 1965-07-20 Automated Building Components Concrete press
GB1071665A (en) * 1963-09-20 1967-06-14 Stafford Tool & Die Company Lt Improvements in or relating to hydraulic presses
US3358348A (en) * 1965-06-14 1967-12-19 Idaco Engineering And Equipmen Method of assembling a truss joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2224968A (en) * 1935-05-14 1940-12-17 Klocke William Hydromechanical press
US2446823A (en) * 1945-10-18 1948-08-10 Farrel Birmingham Co Inc Equalizer for platen presses or the like
US3195449A (en) * 1963-05-15 1965-07-20 Automated Building Components Concrete press
GB1071665A (en) * 1963-09-20 1967-06-14 Stafford Tool & Die Company Lt Improvements in or relating to hydraulic presses
US3358348A (en) * 1965-06-14 1967-12-19 Idaco Engineering And Equipmen Method of assembling a truss joint

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104962A (en) * 1977-03-14 1978-08-08 Automabed Building Components, Inc. Press
US4745856A (en) * 1987-01-29 1988-05-24 Bakker David P Hydraulic refuse compactor with channel guided compactor blade
US5252053A (en) * 1991-02-26 1993-10-12 Boschman Technologies B.V. Apparatus for closing a mold

Also Published As

Publication number Publication date
IL39117A0 (en) 1972-05-30
DE2233582A1 (de) 1973-04-26
GB1350033A (en) 1974-04-18
DK146710C (da) 1984-05-21
DK146710B (da) 1983-12-12
DD97601A5 (enrdf_load_stackoverflow) 1973-05-12
IL39117A (en) 1977-03-31
CS190370B2 (en) 1979-05-31
DE2233582B2 (de) 1976-04-29
HU167406B (enrdf_load_stackoverflow) 1975-10-28
SU482938A3 (ru) 1975-08-30
SE392061B (sv) 1977-03-14
FR2157518A5 (enrdf_load_stackoverflow) 1973-06-01
RO60564A (enrdf_load_stackoverflow) 1976-08-15
NO142162C (no) 1980-07-09
BG19095A3 (bg) 1975-04-30
PL82054B1 (enrdf_load_stackoverflow) 1975-10-31
NO142162B (no) 1980-03-31

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Legal Events

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AS Assignment

Owner name: GANG-NAIL SYSTEMS, INC., A FL CORP.

Free format text: CHANGE OF NAME;ASSIGNOR:AUTOMATED BUILDING COMPONENTS, INC.,;REEL/FRAME:004101/0168

Effective date: 19810205

AS Assignment

Owner name: GANG-NAIL SYSTEMS, INC., FLORIDA

Free format text: MERGER;ASSIGNOR:MITEK INDUSTRIES, INC., A CORP. OF MO., (MERGED INTO);REEL/FRAME:005094/0395

Effective date: 19890519

AS Assignment

Owner name: MITEK HOLDINGS, INC., MISSOURI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MITEK INDUSTRIES, INC.;REEL/FRAME:005156/0841

Effective date: 19890605