AU600815B2 - Jig for forming an arch - Google Patents

Description

AUSTRALIA

PATENTS ACT 1952 COMPLETE SPECIFICATION 0o8 Form

(ORIGINAL)

FOR OFFICE USE Short Title: Int. Cl: Application Number: Lodged: Complete Specification-Lodged: Accepted: Lapsed: Published: @0 00 0 SO SO *0 S 0 @0 0 5 S@S 0 *000

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*5 0 S 0* Priority: Related Art: 1This document contains I famendments made Section 49 and is corrcct i0 printing.

TO BE COMPLETED BY APPLICANT •0*00 Name of Applicant: 55 GANG-NAIL AUSTRALIA LTD.

Address of Applicant: 4 Forbes Close, Knoxfield, 3180 Victoria, Australia Actual Inventor: Address for Service: S* S S S 00 0 5.5555 0 Ronald Alfred WILSON CLEMENT HACK CO., 601 St. Kilda Road, Melbourne, Victoria 3004, Australia.

Complete Specification for the invention entitled: JIG FoR Po QH cH The following statement is a full description of this invention including the best method of performing it known to me:-

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JIG FoR r-CRMtfoc. Ar vAQc-H 5 This invention relates to a jig for producing an arch for use in building and to an arch formed by that jig.

Wooden arches which are used in building and other construction work generally comprise a plurality of laminations which are adhered together to form a laminated beam. The laminated beam is then formed into an arch shape.

The greatest difficulty in manufacturing an arch is to form the laminated beam into the arch shape.

The object of a first aspect of this invention is to provide a jig for forming an arch..

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The invention may be said .o reside in a jig for forming a beam into an arch, comprising a base member, a plurality of arms movably coupled to said base member, each arm having an abutment member against which said beam can be clamped, said arms being movable relative to said base member so that the abutment members define an arch of predetermined radius, each arm having a positioning member extending outwardly from a respective abutment member in a direction opposite to said arm, a clamping member for positioning on said positioning member and movable on said positioning member relative to said abutment member to space the clamping member at a predetermined distance from said abutment member, said o e• clamping member having an engaging member pivotably movable S into clamping engagement with said beam to clamp the beam against said abutment member, and locking means for locking the engaging member in a clamping position.

Preferably said clamping member comprises a block for location in said channel member, an engaging member pivotally supported by said block.

Preferably the engaging member comprises a support portion for supporting a roller and a handle for pivoting said o. support portion and roller relative to said block into engagement with said beam.

Preferably the block is locked to said channel member by a pin which passes through apertures in said block

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and channel member and preferably said engaging member is locked relative to said block by a pin which passes through an aperture in said engaging member and said block.

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0 5e 5 5e0 0 5550 0 -4 o\ t e- xV- c Tn ndr inpcct o:f h:e -invenionui Llhui \is p er a laminated arch comprising a plurality of laminations which have upper and lower surfaces and a pair of side surfaces, said laminations being held together by a fastening means which bridges at least one of the side edges of each lamination to hold the laminations together.

I n a furthor acpcct of tho invenion LhtL-ii2 provided a clamp for clamping a work piece, said mp comprising a block for locating in a cha member, and an engaging member for pivotal coupJ relative to said block, said engaging member hav' a roller for engagement with a work piece and a dle for pivoting said roller into and out of enga nt with said work piece, and locking means for ITlng caid ongaging member realativc to said block.

A preferred embodiment of the invention will be described with reference to the accompanying drawings in which: Figure 1 is a view of a double radius arch; Figure 1A is a view of a single radius arch; 20 Figure 2 is a view of a jig embodying the invention; Figures 3 and 4 are a detailed view of part of the jig of Figure 1; Figure 5 is a view of a clamp used in the jig of Figure 1; and 25 Figure 6 is a view along the line 6-6 of Figure 4.

With reference to the drawings, Figures 1 and 1A show laminated arches according to one aspect of the invention and which are formed by the jig of the other aspect of the invention. Each arch comprises a laminate formed of a plurality of laminations, for example eight laminations 12, 14, 16, 18, 20, 22 and 24. The laminations may be the entire length of the arch or alternatively may, depending on the size of the arch, extend only part of the length of the arch and be joined to further laminations by a joining member 30. In the embodiment shown in Figure 1, the arch has two radii and is formed of three sections A, B and C. The sections A and C have radii R1 and R3 which may be equal to 55

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55 0* 1 1 1 a 1 l 'j i 1 r r 5 one another and the section B has a radius R2 which is much greater than the radii R1 and R3. One group of laminations may form the section A and another group of laminations may form the section B and yet a further group of laminations may form the section C. The three groups of laminations are joined by the .fastening members 30. Each of the laminations in the groups are joined by a fastener 32 which bridges the side edges of all of the laminations. By using the fasteners 32 which bridge the side edges of the laminations to join the laminations together, it is not necessary to use adhesive or 1 like means to glue the laminations Cogether. Thus, the arch or arch section can be more quickly and conveniently formed.

o Figures 2 to 6 show the preferred embodiment of a jig for forming the arch or for forming an arch section. The 15 jig comprises a pair of base plates 40 and 50 which are supported by legs 42. Two plates 40 and 50 are used for ease of assembly and transport and are connected by pins 13 which pass through holes 15. The plates 40 are provided with a plurality of sets of holes 44, each hole in the sets of holes eo o 20 44 defines a curve of different radii. Each hole defining a eg predetermined radii may be joined by a line or otherwise marked to show that particular radii.

Releasably and movably coupled to the plates are a 4 25 plurality of arms 60 which define the radius of an arch or S" 25 arch section formed by the jig. The arms 60 comprise a plurality of sets of arm plate pairs which sandwich the plates and 50. The pairs of arm plates 62 are provided with apertures 64. In order for the arm plates 62 to define a predetermined radius, an aperture 64 in the arm plate 62 is matched with an aperture 44 in the plates 40 and 50, and a pin 47 is passed through those apertures to lock the arm plate at the desired position on the plates 40 and The arm plates 62 are provided at one end with a generally vertically extending abutment plate 66. Each set of arms arejoined by a strut 68 held by a pin 69 for strengthening and stabilizing the structure. Extending outwardly from the abutment plates 66 in a direction opposite

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rw~ 6 to the arms 62 is a channel member 70 of generally square U-shaped cross-section. The channel sections 70 are supported by a leg 72.

As is best shown in Figures 3 to 5, a work piece W which is a laminate formed from a plurality of laminations which have their side edges joined by a fastening member 30 as shown in Figure i, is to be forced into the arch shape by the jig and is located on the channel members 70 with one of its sidei against a first of the abutment plates 66. A clamp block 80 (see Figures 4 to 6) is located in the channel member 70 and has a height which is less than the height of the 0 channel member 70 so that the block can locate beneath the work piece W. The block 80 is provided with a plurality of apertures 82 and the channel members are provided with 15 apertures 84. The block 80 is locked in the channel members in an appropriate posit.on by locating a pin 91 through the apertures 84 in the channel member and through the apertures 82 in the block. The block 80 has a sleeve 86 located at one end for receiving a stem 88 on engaging member 90. The 20 engaging member 90 comprises a pair of support plates 92 which support a roller 94 mounted on a pin 96 which extends between *see the plates 92. The plates 92 are further supported by a vertical member 98 which is provided with a handle 100. When the stem 88 is located in the sleeve 86 as is shown in Figure S. 25 4, the engaging member 90 can be pivotted towards and away from the work piece W which is represented by the dotted lines in Figure 4.

In order to force the work piece W to take up the arched shape defined by the abutment plates 66, an engaging member 90 is located in the sleeve 86 of one of the blocks and is pivotted against the work piece to force the work piece to abut against the abutment plate 66. The engaging member is then locked in place by locating a pin through an aperture 102 in bottom plate 92 which is received in an aperture 104 of the block to thereby lock the engaging member relative to the block so that the roller 94 of the engaging member forces the work piece against the abutment wall 66. The work piece W

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i rn; i- ii~iiiiir;------ 7 can be firmly forced against the abutment member 66 since as the engagement member 90 is rotated, the roller 94 abuts the side walls of the work piece W and rolls on that side wall as it pushes the work piece W against the abutment plate 66 to force the work piece to take up the arch shape. The abutment member may then be secured in place by a pin which passes through the aperture 102 and into the aperture 104 in the block.

The work piece is then continued to be forced into the arch shape by locating another engagement member 90 in the next block and forcing the next part of the work piece against the appropriate abutment plate 66. One of the previous engagement members 90 may then be released from its block and be taken to the next block 80 and located in its sleeve 86 *fee 15 to force the next portion of the work piece W against the next abutment plate 66. This may continue until the entire work piece W has been forced into the arch shape defined by the abutment plates 66. In the preferred embodiment each of the channel members 70 may be provided with a block 80 and 4 or 00 20 engagement members 90 may be provided for use in forcing the work piece W into the arch shape. Alternatively, and if desired less blocks can be used and the blocks can also be moved from channel member to channel member in oirder to S facilitate movement of the work piece W into the arch shape.

Since modification within the spirit and scope of the invention may readily be effected by persons skilled within the art, it is to be understood that this invention is not limited to the particular embodiment described by way of example hereinabove.

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Claims (7)

1. A jig for forming a beam into an arch, comprising a base member, a plurality of arms movably coupled to said base member, each arm having an abutment member against which said beam can be clamped, said arms being movable relative to said base member so that the abutment members define an arch of predetermined radius, each arm having a positioning member extending outwardly from a respective abutment member in a direction opposite to said arm, a clamping member for positioning on said positioning member and movable on said positioning member relative to said abutment member to space the clamping member at a predetermined distance from said abutment member, said clamping member having an engaging member pivotably movable into clamping engagement with said beam to clamp the beam against said abutment e member, and locking means for locking the engaging member in a clamping position. oeeee

2. The jig of Claim i, wherein the base member comprises a pair of base plates which are supported by legs and each arm comprises a pair of arm elements which sandwich said plates, said arm elements having a plurality of holes therein and said plates having a plurality of holes therein so that said arm elements can be moved relative to the plates and secured in place by a pin which passes through respective holes in the arm elements and plates so that the arm elements are therefore said arms define S the predetermined radius.

3. The jig of Claim 1 or 2, wherein said positioning member comprises a channel member, and wherein a plurality of said clamping means are provided for receipt in respective chinnel members, each clamping means comprising a block for location in said channel member, said engaging member being pivotally supported by said block.

4. The jig of Claim 3, wherein the engaging member comprises a support portion for supporting a roller and a handle AT O i 9 for pivoting said support portion and roller relative to said block into engagement with said beam.

The jig of Claim 3 or 4, wherein the block is locked to said channel member by a pin which passes through apertures in said block and channel member and wherein said locking means comprises a pin which passes through an aperture in said engaging member and said block.

6. A jig according to Claim 1, wherein a plurality of clamping means are provided for location on selected positioning members and said clamping means are selectively engageable with the beam to force the beam to take up the arch shape defined by the abutment members. *go

7. The jig of any one of the preceding claims wherein the beam is a laminated beam comprising a plurality of laminations which have upper and lower surfaces and a pair of side surfaces, said laminations being held together by a fastening means which bridges at least one of the side edges of each lamination to hold the laminations together. •000 DATED this 8th DAY OF June 1990 eo GANG-NAIL AUSTRALIA LTD. By Its Patent Attorneys GRIFFITH HACK CO. 5 Fellows Institute of Patent Attorneys of Australia A-JSp "f-I -I -P.NT 0 C 1---1