Method and apparatus for assembling box units

• US 4,824,510 A
• Filed: 11/27/1987
• Issued: 04/25/1989
• Est. Priority Date: 11/27/1987
• Status: Expired due to Term

• Current Assignee: Weyerhaeuser Company (Weyerhauser)
• Original Assignee: Trus Joist Corporation (RedBuilt LLC)
• Inventors: Atwood, Thomas M., Troutner, Arthur L.
• Primary Examiner(s): SIMMONS, DAVID A
• Application Number:
  US07/125,701
• Time in Patent Office: 515 Days
• Field of Search: 156/288, 269/37, 269/40-45, 269/243, 144/2 C, 144/3 L
• US Class Current: 156/288
• CPC Class Codes: B25B 5/003 Combinations of clamps
• CPC Class Codes: B25B 5/142 for windows and frames
• CPC Class Codes: B27M 3/34 of cases, trunks, or boxes, of wood or equivalent material which cannot satisfactorily be bent without softening nailing or stapling in general B25C, B27F; of cardboard, paper, or similarly workable material B31B ; Manufacture of cleats therefor manufacture of tubes, coops or barrels B27D1/00, B27D1/08; by folding grooved panels B27G5/00

Abstract

An apparatus and method for assembling elongate box units are disclosed. The apparatus includes plural, elongate clamping elements which are constructed to define a corner configuration for adjacent side pieces of a box unit. Plural, elongate tensioning rods typically extend through the clamping elements in an array with the rods extending perpendicular to the elongate length of the box unit. The method of the invention teaches the use of the apparatus for forming the elongate box units.

Claims

1. An apparatus for assembling elongate box units wherein the box units consist of multiple elongate side pieces joined on their long edges, comprising:

plural, elongate clamping elements, formed from a plurality of formation angles with said formation angles each being equal to the angle of a corner of a box unit to be formed, constructed and arranged to define a corner configuration for adjacent side pieces of at least two of the box units; and

plural, elongate tensioning rods extending between said clamping elements in an array, with said rods extending perpendicular to the elongate length of the box units.

2. The apparatus of claim 1 wherein said tensioning rods include means for applying a predetermined amount of pressure to the assembled box units along their joined edges.

3. The apparatus of claim 2 wherein said means for applying pressure includes abutment members located adjacent one end of each rod, for abutting a first of said clamping elements.

4. The apparatus of claim 3 wherein said abutment member includes a substantially U-shaped element received on said one end of each rod.

5. The apparatus of claim 4 wherein said rods include plural, spaced-apart, abutment-member receivers disposed along the length of each rod intermediate the ends thereof for receiving said abutment members for adjusting the operable length of said rods.

6. The apparatus of claim 2 wherein said means for applying pressure includes fastening means located adjacent another end of a rod for abutting a second of said clamping elements.

7. The apparatus of claim 6 wherein said fastening means includes an increment gauge.

8. The apparatus of claim 1 wherein said tensioning rods extend parallel to some of the box unit side pieces and extend perpendicular to others of the box unit side pieces.

9. The apparatus of claim 1 wherein said element includes four 90°

angle bars arranged in a cruciform shape, said cruciform shape having equal-length arms and further including spacers located between said bars and fixed to the arms thereof for maintaining said bars in a spaced apart relationship and to maintain said element in a rigid condition along its length.

10. The apparatus of claim 9 wherein said cruciform shaped clamping element includes a pair of substantially equal-length structures crossed in a perpendicular relationship, each structure defining multiple apertures extending therethrough along the respective axis thereof, said apertures being sized to accommodate said rods, said clamping elements being constructed and arranged to be rigid along their lengths.

11. The apparatus of claim 1 wherein said clamping elements are constructed and arranged to define an external corner configuration for adjacent side pieces.

12. An apparatus for assembling box units comprising:

a cluster of plural, elongate clamping elements, each element having a cruciform cross section; and

tensioning means extending between said clamping elements, constructed and arranged to apply equal tension to said clamping elements when said elements are disposed in said cluster with box units interspersed therebetween.

13. The apparatus of claim 12 wherein each of said clamping elements is formed of a pair of perpendicularly intersecting arms, with each of said arms being of equal-length and having sides formed in an opposed, spaced apart relationship, and including spacer means disposed between said sides to maintain said relationship, said clamping elements defining apertures extending through opposed arms.

14. The apparatus of claim 13 wherein said spacer means extend between opposed arms of said clamping elements.

15. The apparatus of claim 12 wherein said tensioning means includes plural, elongate tensioning rods extending through said clamping elements, one end of each rod having an abutment member thereon for abutting a clamping element on one side of said cluster and the other end of each rod having fastening means thereon for abutting a clamping element on the other side of said cluster.

16. The apparatus of claim 15 which further includes an increment gauge located at said other end of each rod.

17. The apparatus of claim 15 wherein each of said rods include plural, spaced-apart, abutment-member receivers disposed along the length of said rod intermediate the ends thereof for receiving each of said abutment members, for adjusting the operable length of said rods.

18. The apparatus of claim 17 wherein each of said abutment members includes a U-shaped element which is constructed and arranged to be clearance fittable in said receiver.

19. A method of assembling plural, elongate box units comprising:

deploying a horizontal cluster of spaced apart, elongate clamping elements which define an external corner configuration of a box unit;

compiling the components of a first layer of plural box units between adjacent clamping elements,

deploying a second horizontal cluster of spaced apart clamping elements on the first layer of box units;

laying down additional layers and clusters to assemble a desired quantity of box units; and

tensioning, uniformly, along the length of the cluster, with horizontal and vertical clamping forces, the clamping elements.

20. The method of claim 19 wherein said deploying of the first cluster includes;

arranging a set of vertically oriented tensioning rods;

positioning the clamping element on at least two vertical tensioning rods, the rods being located intermediate the ends of a clamping element; and

inserting horizontal tensioning rods intermediate the ends of the clamping elements.

21. The method of claim 20 wherein said arranging includes installing foot plates on the vertical tensioning rods.

22. The method of claim 20 wherein said arranging includes installing an element-abuting stop on the vertial tensioning rods.

23. The method of claim 20 wherein said inserting includes adjusting the operable length of the horizontal tensioning rods to accommodate a desired quantity of box units.

24. The method of claim 19 whereinsaid compiling includes:

preparing the material for the box units;

applying adhesive to the facing edges of the pieces;

laying a box-bottom-side piece between adjacent clamping units.

laying opposed, spaced apart side pieces on the bottom piece; and

laying a top-side piece on the side pieces.