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Publication numberUS20040179892 A1
Publication typeApplication
Application numberUS 10/482,553
PCT numberPCT/IB2002/001812
Publication dateSep 16, 2004
Filing dateMay 24, 2002
Priority dateMay 24, 2001
Also published asEP1395714A1, WO2002095153A1
Publication number10482553, 482553, PCT/2002/1812, PCT/IB/2/001812, PCT/IB/2/01812, PCT/IB/2002/001812, PCT/IB/2002/01812, PCT/IB2/001812, PCT/IB2/01812, PCT/IB2001812, PCT/IB2002/001812, PCT/IB2002/01812, PCT/IB2002001812, PCT/IB200201812, PCT/IB201812, US 2004/0179892 A1, US 2004/179892 A1, US 20040179892 A1, US 20040179892A1, US 2004179892 A1, US 2004179892A1, US-A1-20040179892, US-A1-2004179892, US2004/0179892A1, US2004/179892A1, US20040179892 A1, US20040179892A1, US2004179892 A1, US2004179892A1
InventorsJohannes Du Preez
Original AssigneeDu Preez Johannes Petrus
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Connector for timber brandering
US 20040179892 A1
Abstract
The invention provides a connector (10) for connecting two lengths of timber brandering (36 and 38) end-to-end in a roofing structure. The connector (10) comprises an elongate, hollow sleeve (12) which is sized and shaped to receive a length of timber brandering (36 or 38) of generally square cross section at each longitudinal end (28 and 30) thereof, and which includes a pair of inwardly directed gripping formations (20 and 22) for gripping brandering of various different cross-sectional dimensions within a predetermined tolerance by engaging or deforming the brandering. A web or flap (34) is provided approximately midway along the length of the sleeve (12) for limiting the extent to which brandering may be inserted into the sleeve from each longitudinal end (28 and 30) thereof. The sleeve (12) also includes two apertures (44) for allowing the brandering to be locked in position within the sleeve with locking pins or nails (45).
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Claims(15)
1. A connector for connecting two lengths of timber brandering end-to-end comprising an elongate, hollow sleeve which is sized and shaped to receive a length of timber brandering of generally square cross section at each longitudinal end thereof, and which includes at least one inwardly directed gripping formation on each of two contiguous side walls of the sleeve for gripping brandering of various different cross-sectional dimensions within a predetermined tolerance by engaging or deforming the brandering, characterised in that the inwardly directed gripping formations comprise indentations in side walls of the sleeve defining, on the inner surface of the sleeve, rigid projections which include engaging surfaces for engaging the timber brandering.
2. A connector according to claim 1, wherein the rigid projections comprise elongate ribs which include rounded engaging surfaces.
3. A connector according to claim 2, wherein each elongate rib extends from a location spaced inwardly from one end of the sleeve to a location spaced inwardly from the other end of the sleeve.
4. A connector according to claim 3, wherein each elongate rib is stamped into one of the side walls of the sleeve.
5. A connector according to any one of the preceding claims, wherein the sleeve includes at least one inwardly directed stop formation located approximately midway along the length of the sleeve for limiting the extent to which brandering may be inserted into the sleeve from each longitudinal end thereof.
6. A connector according to claim 5, wherein the stop formation comprises a flap which extends inwardly from one side wall of the sleeve.
7. A connector according to claim 6, wherein the flap is formed by cutting and bending a portion of one side wall of the sleeve so that one end of the flap is joined to the sleeve along a joint which extends transversely to the length of the sleeve.
8. A connector according to any one of the preceding claims, wherein the sleeve defines one or more windows in a side wall thereof for checking that the timber brandering has been properly inserted into the sleeve.
9. A connector according to any one of the preceding claims, wherein the sleeve is formed from metal sheeting.
10. A connector according to claim 9, wherein the metal sheeting is galvanised iron.
11. A connector according to claim 10, wherein the sleeve is formed from two pieces of galvanised iron which are joined together along corner edges of the sleeve.
12. A connector according to any one of claims 1 to 8, wherein the sleeve is formed from a plastics material.
13. A timber joint comprising a connector according to any one of the preceding claims and two lengths of timber joined end-to-end by insertion into opposite ends of the sleeve.
14. A timber joint according to claim 13 in a roofing structure.
15. A timber joint according to claim 14 in a roofing structure.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    This invention relates to connectors for timber members and more specifically to a connector for connecting timber brandering end-to-end in a roofing structure.
  • [0002]
    Timber brandering or purlins in roofing structures span timber trusses as generally horizontal beams for supporting roofing sheets, tiles or ceiling boards. Typically, the brandering is connected end-to-end at joints which have to be relatively strong because these members tend to carry reasonably high loads. Conventional brandering for roofing sheets or tiles is cut so that the joints between adjacent lengths of brandering are located directly above rafters in the timber trusses, and the ends of the brandering are connected to the rafters with nails.
  • [0003]
    A problem associated with this type of joint is that the nails used to connect the lengths of timber brandering to the rafters are driven through the timber adjacent the ends of the brandering and this often causes the timber at these ends to split, thereby reducing the strength of the joint. In addition, since the joints have to be located directly above the rafters, generally it is necessary to cut the brandering whilst balancing on a partially completed roofing structure. Apart from being time consuming, this tends to be relatively dangerous and has led to accidents in the past. It will also be appreciated that cutting the brandering to the correct length on the roofing structure results in timber waste which increases the cost of the structure.
  • [0004]
    It is an object of the present invention to provide a connector for connecting two lengths of timber brandering end-to-end in a joint which is relatively strong and which is relatively easy and safe to construct.
  • SUMMARY OF THE INVENTION
  • [0005]
    According to the invention there is provided a connector for connecting two lengths of timber brandering end-to-end comprising an elongate, hollow sleeve which is sized and shaped to receive a length of timber brandering of generally square cross section at each longitudinal end thereof and which includes at least one inwardly directed gripping formation for gripping brandering of various different cross-sectional dimensions within a predetermined tolerance by engaging or deforming the brandering.
  • [0006]
    In a preferred embodiment of the invention, the sleeve includes at least one inwardly directed stop formation located approximately midway along the length of the sleeve for limiting the extent to which brandering may be inserted into the sleeve from each longitudinal end thereof.
  • [0007]
    The stop formation may comprise a flap which extends inwardly from one side wall of the sleeve.
  • [0008]
    Typically, the flap is formed by cutting and bending a portion of one side wall of the sleeve so that one end of the flap is joined to the sleeve along a joint which extends transversely to the length of the sleeve.
  • [0009]
    In a particularly preferred embodiment, the sleeve has a generally square cross section and includes an inwardly directed gripping formation on each of two contiguous side walls thereof.
  • [0010]
    In one arrangement, the or each inwardly directed gripper comprises an elongate rib which extends from a location spaced inwardly from one end of the sleeve to a location spaced inwardly from the other end of the sleeve. In this way, the entrance to each end of the sleeve is free of grippers to facilitate the insertion of the timber brandering into the sleeve ends.
  • [0011]
    The sleeve may also define one or more windows in a side wall thereof for checking that the timber brandering has been properly inserted into the sleeve.
  • [0012]
    Typically, the sleeve includes one or more apertures for allowing the brandering to be locked in position within the sleeve with locking pins or the like.
  • [0013]
    The sleeve may be formed from metal sheeting, preferably a single sheet of galvanised iron which is folded along one side of the sleeve to form a seam.
  • [0014]
    Alternatively, the sleeve may be formed from two sheets of galvanised iron which are connected together along two of the corner edges of the sleeve.
  • [0015]
    Although the thickness of the metal sheet will depend upon the particular application of the connector, in one application the sleeve is formed from galvanised iron sheeting having a thickness of approximately 0.5 mm.
  • [0016]
    The sleeve may also be formed from other materials such as a plastics material.
  • [0017]
    The invention extends to a timber joint comprising a sleeve as described above and two lengths of timber joined end-to-end by insertion into opposite ends of the sleeve.
  • [0018]
    The joined timber may be used in roofing applications, ceiling applications or other structural applications.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0019]
    The invention will now be described in more detail, by way of example only, with reference to the accompanying drawings in which:
  • [0020]
    [0020]FIG. 1 shows a perspective view of a connector according to the present invention with two lengths of brandering adjacent the connector;
  • [0021]
    [0021]FIG. 2 shows a cross-sectional view along the line 2-2 in FIG. 1;
  • [0022]
    [0022]FIG. 3 shows a cross-sectional view similar to that of FIG. 2 with brandering of a first cross-sectional dimension inserted into the connector; and
  • [0023]
    [0023]FIG. 4 shows a cross-sectional view similar to that of FIG. 2 with brandering of a second cross-sectional dimension inserted into the connector.
  • DESCRIPTION OF A PREFERRED EMBODIMENT
  • [0024]
    [0024]FIG. 1 of the accompanying drawings illustrates a connector 10 according to the present invention. As can be seen, the connector 10 comprises a sleeve 12 which defines a hollow passage 14 therethrough. In this embodiment of the invention, the sleeve 12 has a generally square cross-sectional shape and is preferably formed from sheet metal, for example 0.5 mm thick galvanised iron, which is both reasonably strong and corrosion resistant.
  • [0025]
    With reference also to FIG. 2 of the drawings, two contiguous side walls 16 and 18 of the sleeve 12 include inwardly directed gripping formations in the form of two ribs 20 and 22. In the illustrated embodiment, the ribs 20 and 22 are stamped from the side walls 16 and 18 and extend from locations 24 and 26 spaced inwardly from one end 28 of the sleeve 12 to locations spaced inwardly from the opposite end 30 of the sleeve.
  • [0026]
    In a central region 32 of the sleeve, a stop formation in the form of a generally square web or flap 34 limits the extent to which brandering 36 and 38 can be inserted into the sleeve 12 from either of the ends 28 and 30 thereof. The flap 34 is cut from a side wall 40 of the sleeve and is bent at 90 to the length of the sleeve, as shown. The opening formed by bending the flap 34 into the sleeve 12 creates a window 42 for checking that the brandering has been properly inserted into the sleeve. It will be appreciated that the window 42 allows for checking on only one side of the flap 34, and accordingly another, similar window (not shown) may be provided adjacent the flap 34 for checking the brandering on the other side of this flap.
  • [0027]
    In FIG. 1 of the drawings, the side wall 40 is seen to include two apertures 44 for locking brandering within the sleeve 12 with locking pins or nails 45.
  • [0028]
    The sleeve 12 in the illustrated embodiment is formed from a single piece of galvanised iron which is joined along a seam 46 on a side wall 48 of the sleeve. However, the sleeve 12 could also be formed from two pieces of galvanised iron which are joined together along corner edges of the sleeve, if desired.
  • [0029]
    The cross-sectional dimensions and the length of the sleeve 12 are selected to accommodate the dimensions of the timber brandering to be joined together. For example, 3838 timber brandering generally has cross-sectional dimensions of 38 mm by 38 mm with a tolerance of say −2 mm. In this case, the internal passage 14 of the sleeve 12 will be dimensioned so that the entrances to this passage can receive 38 mm by 38 mm brandering with a sliding fit, and the ribs 20 and 22 will be dimensioned so as to extend a little more than 2 mm into the passage 14, thereby to engage brandering with cross-sectional dimensions of 36 mm by 36 mm.
  • [0030]
    In practice, the two lengths of brandering 36 and 38 are connected together by simply inserting one of the lengths of brandering 36 into the end 28 of the sleeve 12 and feeding the brandering 36 along the hollow passage 14 until the end 50 thereof buts against the flap 34, and then inserting the other length of brandering 38 into the end 30 of the sleeve 12 and feeding this brandering along the passage 14 until it buts against the flap 34. As the brandering 36 and 38 is fed along the passage 14 it engages the ribs 20 and 22. Where the cross-sectional dimensions of the brandering are 36 mm by 36 mm, the brandering is engaged by the gripping ribs 20 and 22 and held in position in the manner illustrated in FIG. 3. Where the brandering cross-sectional dimensions are greater than 36 mm by 36 mm, the ribs 20 and 22 deform the outer surfaces of the brandering as it is forced along the passage 14 to grip the brandering in position in the manner illustrated in FIG. 4. It will be appreciated that the absence of gripping formations at the entrances to the passage 14 facilitates the insertion of the brandering 36 and 38 into the sleeve 12.
  • [0031]
    The stop formation 34 and the inwardly directed gripping formations 20 and 22 need not take the form of that shown in the drawings, although it is considered important that the sleeve is not easily removable from the timber brandering and that one length of brandering cannot be inserted into the sleeve beyond the approximate midpoint thereof.
  • [0032]
    One advantage of the connector of the present invention is that, provided the sleeve 12 is formed from a material which is reasonably strong, the joint between two lengths of brandering should be at least as strong as the timber brandering itself. This is a significant improvement over conventional connections between timber brandering where, generally, the joint is considered to be a weak point.
  • [0033]
    A further advantage of the connector according to the present invention is that it is not necessary to cut the brandering before effecting the joint, as is the case with conventional brandering joints. This is advantageous because it tends to be difficult, dangerous and time consuming to cut brandering while balancing on a roofing structure.
  • [0034]
    It is envisaged that prior to even lifting the brandering onto the roof, sleeves 12 will be fitted to one of the ends of some brandering, and thereafter the brandering will be lifted onto the roof and nailed into position with the sleeves already fitted. The brandering to be joined end-to-end with that already in position will simply be slotted into the opposite ends of the sleeves 12 and nailed into position. In this way, the joints can be effected relatively quickly and easily by non-skilled labour.
  • [0035]
    Apart from being stronger than conventional joints, the joints constructed with connectors according to the invention will result in very little timber loss from off-cuts.
Referenced by
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US7866098 *Sep 7, 2007Jan 11, 2011Andalay Solar, Inc.Mounting system for a solar panel
US7987641Sep 7, 2007Aug 2, 2011Andalay Solar, Inc.Mounting system for a solar panel
US8505248Mar 14, 2008Aug 13, 2013Andalay Solar, Inc.Minimal ballasted surface mounting system and method
US8813460Sep 21, 2007Aug 26, 2014Andalay Solar, Inc.Mounting system for solar panels
US8919052Jul 2, 2010Dec 30, 2014Zep Solar, LlcPivot-fit frame, system and method for photovoltaic modules
US8919053Jul 2, 2010Dec 30, 2014Zep Solar, LlcLeveling foot apparatus, system, and method for photovoltaic arrays
US8938919Jun 8, 2010Jan 27, 2015Andalay Solar, Inc.Electrical connectors for solar modules
US8938932 *Jan 28, 2014Jan 27, 2015Quality Product LlcRail-less roof mounting system
US8991114Jul 2, 2010Mar 31, 2015Zep Solar, LlcPivot-fit connection apparatus, system, and method for photovoltaic modules
US9154074Oct 21, 2014Oct 6, 2015Solarcity CorporationApparatus for forming and mounting a photovoltaic array
US9243817Jun 6, 2012Jan 26, 2016Solarcity CorporationApparatus for forming and mounting a photovoltaic array
US9291369Dec 9, 2011Mar 22, 2016Solarcity CorporationSkirt for photovoltaic arrays
US9300244Nov 14, 2014Mar 29, 2016Solarcity CorporationApparatus for forming and mounting a photovoltaic array
US9320926Jun 28, 2012Apr 26, 2016Solarcity CorporationSolar panel fire skirt
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US20070295393 *Sep 7, 2007Dec 27, 2007Akeena Solar, Inc.Mounting system for a solar panel
USD749502Apr 29, 2015Feb 16, 2016Solarcity CorporationCombined panel skirt and photovoltaic panels
USD759464Mar 20, 2015Jun 21, 2016Solarcity CorporationLeveling foot
USD765591Mar 12, 2015Sep 6, 2016Solarcity CorporationPanel skirt and photovoltaic panel
Classifications
U.S. Classification403/300
International ClassificationE04D12/00, E04B1/26
Cooperative ClassificationE04B1/2608, Y10T403/57, E04D12/004
European ClassificationE04B1/26B1, E04D12/00C