CA1268648A - Clip fastener - Google Patents
Clip fastenerInfo
- Publication number
- CA1268648A CA1268648A CA000519449A CA519449A CA1268648A CA 1268648 A CA1268648 A CA 1268648A CA 000519449 A CA000519449 A CA 000519449A CA 519449 A CA519449 A CA 519449A CA 1268648 A CA1268648 A CA 1268648A
- Authority
- CA
- Canada
- Prior art keywords
- post
- channel
- clip
- clip fastener
- engage
- 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 - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/02—Wire fencing, e.g. made of wire mesh
- E04H17/10—Wire fencing, e.g. made of wire mesh characterised by the way of connecting wire to posts; Droppers
- E04H17/12—Wire fencing, e.g. made of wire mesh characterised by the way of connecting wire to posts; Droppers the wire being placed in slots, grooves, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Clamps And Clips (AREA)
Abstract
ABSTRACT
A clip fastener operated by finger pressure having a barbed prong 1 which fits into the groove 8 of a winged post 6. The fastener is provided with a flange 2 which extends laterally of the prong 1 and is spaced from the barb 3 such that the flange 2 is held firmly against the wings 7 of the post when the barb 3 engages the inner wall 9 of the post groove. The flange 2 serves to retain a fence wire, sign or other member which may be attached to a post.
A clip fastener operated by finger pressure having a barbed prong 1 which fits into the groove 8 of a winged post 6. The fastener is provided with a flange 2 which extends laterally of the prong 1 and is spaced from the barb 3 such that the flange 2 is held firmly against the wings 7 of the post when the barb 3 engages the inner wall 9 of the post groove. The flange 2 serves to retain a fence wire, sign or other member which may be attached to a post.
Description
~2~
Title: "CLIP FASTENER"
TECH ICAL FIELD
This invention relates to a fastening system and more particularly to a clip fastener for use with posts.
The invention will be described in relation to its application to fence posts and fencing systems but is not limited to such applications. For example, the invention ;~ may be used in fastening signs or reflector plates to posts or for supporting irrigation piping.
BACKGROUND ~RT
~ Fencing wires in the past have been attached to .~ .
wooden posts by means of staples. Wooden posts have recently been replaced by steel posts. These posts usually have a longitudinal gripping means running the , ~ length thereof. An exe~plary form~o~ such a post has a -~ substantially closed channel portion and two flanges 'projecting outwardly~one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length :, :: : :
of said post and bent backwards to present the wire cutting on the edges.
~:
,:
' ~ ' ' ' ', ' 36~3 Fencing wires are normally attached to these previously known steel posts by means of staple which is driven or hammered into the post groove. This has the disadvantage of usually requiring a special tool, such as co-mpressed air staple gun, to drive the staple into the gr~ove. Use of manual means, such as a hammer, results in problems of holding the post rigid and the resilience of the post groove lips.
A further problem with known systems is that insertion of the ~taple results in expansion or spreading of the groove lips at and adjacent to the point of insertion. This expansion makes the insertion of staples adjacent to each other extr~mely difficult as the retention force applied by the groove lips to the staples is reduced and can result in loose staples and poor retention of fencing wires. It has been found that staples must be spaced by at least 10 cm in order maintain reasonable retention by the groove lips.
A further disadvantage is that with time and movement of the fence wires the staples become loose and may slide within the groove or come loose altogether.
DISCLOS _ OF INVENTION
. An object of the present lnvention is to provide a clip faste.ner which overcomes at least some of these dis-advantages and provides a simple clip which is inexpensive to manufacture and can be installed by thumb pressure or with a hand tool using only hand pressure.
~ ,:
3L~S1~ 8 According to a first aspect, the present invention consists in a clip fastener, for use with a post of the kind hereinbefore described, comprising:
a retaining portion adapted to abut the post adjacent the post groove so as to provide a flange adapted to retain a member said retaining portion exterlding laterally of an anchor portion, said anchor portion adapted to be inserted into the post groove and having a resilient barb means adapted to engage the inner wall of the post groove.
The resilient barb means preferably ~omprises ~
tongue cut from the anchor portion to form a prong or detente extending at angle thereto. The end of the prong is preferably crescent shaped to produce two sharp edge points which engage with the inner wall of the post groove.
Accordi~g to a second aspect, the invention comprises in combination:
a post comprising a substantially closed channel portion and two flanges projecting outwardly one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length o said post, and a fastener comprising, a retaining portion abutting said flanges ad~acent said channel portion and forming a flange adapted to retain a member, : ~
, .. -6~3 ~, and an anchor portion extending laterally of said wire retaining portion and inserted between the lips of the post having a resilient barb means engaging the inner wall of the post channel.
According to a third aspect, the invention comprises a method of constructing a ence including the steps of:
clamping a fencing wire or mesh to a fence post having a longitudinally extending grooved hollow by means of the clip fastener according to the first aspect.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the invention will now be described by way of example only, with reference to the accompanying drawings in which:
~ igurP 1 is a side elevation of the clip fastener according to the invention;
~; Figure 2 is an end elevation of the clip fastener shown in Figure l;
Figure 3 is a side elevation of a clip fastener :~ according to a further embodiment of the invention;
Figure 4 is a plan view of a ~ence post with the clip fastener according to the invention in place;
Figure 5 is a front view of the fence post showing ~the clip fastener with fence wire attached.
Figure 6 is a perspective view of the clip fastener according ~o the invention showing an angled retention means;
... ..
~:
-.
~,2;~
BEST MODE FOR CARRYING OUT TH~ I~VENTION
Referring to the drawings, the clip fastener is preferably manufactured in one piece from sheet spring steel of approximately l-1.5mm thickness, however other resili~nt materials such as plasti~ could be usea. The clip has an anchor portion ] and ~ retaining portion 2 extending laterally thereto as shown in Figures 1 ana 2.
A resilient barb is formed by cutting and pressing out a tongue of material to form a prong 3. This prong preferably has a crescent-shaped free end 5.
The retaining portion 2 has a semi-circular deformation ~ 4 to enable the retention of the fence wire or the like.
; Figure 3 shows a dual anchorage type arrangement wherein the retaining deformation 4 links the two anchor portions 1.
In use, as shown in ~igures 4 and 5, the anchor portion 1 is aligned with the groove of the fence post formed by lips 8 of the closed channel fence post 6. ~he !
anchor portion is then pressed using only thumb pressure into the groove. Barb 3 is resiliently deformed as the anchor portion enters the groove being compressed by the `lips 8 of the post groove. Barb 3 is arranged to be biased outwardly to engage with the inner wall 9 of the post. The fastener is held in clip ~ngagement between the barb 3 engaging the interior wall 9 and the retaining portion 2 abut.ing the out-ardly extending flanges 7 of ,~
..
the post. The dimensions of the clip fastener are arranged such that the clip is firmly held by the resilient force applied by the barb 3. Further, the barb 3 will oppose any force applied to remove the clip fastener from the groove.
In order to improve resistance to movement along the length of the groove by the clip fastener the barb preferably has a crescent-shaped free end 5 to form points which engage with, and may even deform the inner surface 9 of the groove. These points greatly increase the resistance of the fastener, once inserted, to translation longitudinally along the post groove.
Further resistance to movement of the fastener may be provided by forming two inwardly extending barbs at the junction of the anchor portion and the retaining portion. These barbs are arranged to engage with the surface of the post on insertion of the clip and resist movement of the cllp relatlve to th~ post. Barbs can also be formed on the~flat surfaces of the clip by burst punching holes therein to produce a ragged edged hole.
These edges again engage with the surface of the post to resist movement of the clip.
Resistance to movement by the clip along the length of the post groove may be further increased by roughening of the inner surface 9 of the groove. This is done by providing a plurality of deformations along this surface for interengagement with the barb 3 of the clip. These .. . .
, ' ,, '~':
deformations are preferably provided by rolling the post me~ber, before it is formed into its specific cross-sectional shape, with spiked rollers which score or deform the surface of the post member. This rolling is confined to an area of the post ~ember which will form the inner surface of the post once it is formed into its cross-sectional shape.
Figure 5 shows the clip being used to retain barbed wire 10, however the clip is not limited to use with fencing wire and may be used with any form of elongated member. Other possible uses would include mounting of conductive wires for use with electric fences and having insulators which would be retained by the clip.
Figure 6 is a perspective view of a clip fastener with an angled wire retention means~ Such a fastener is used ~or cross mesh or diamond mesh fences. The si7e and thickn~ss of the fasteners can be varied according to their required purpose.
The clip fastener is preferably manufactured by a single stamping and pressing fro~ a sheet of resilient material.
Whilst the embodiments of the present invention have been described with reference to a post have a particular cross-sectional shape it will be apparent to those skilled in the art that the clip fastener of the present invention may be used in conjunction with fence posts having different cross-se~tional shapes. It will also be ~..
' ', apparent that other embodiments of the invention described are possible without departing from the spirit or scope of the invention.
:
: . :
, ~ . - .
,. ..
Title: "CLIP FASTENER"
TECH ICAL FIELD
This invention relates to a fastening system and more particularly to a clip fastener for use with posts.
The invention will be described in relation to its application to fence posts and fencing systems but is not limited to such applications. For example, the invention ;~ may be used in fastening signs or reflector plates to posts or for supporting irrigation piping.
BACKGROUND ~RT
~ Fencing wires in the past have been attached to .~ .
wooden posts by means of staples. Wooden posts have recently been replaced by steel posts. These posts usually have a longitudinal gripping means running the , ~ length thereof. An exe~plary form~o~ such a post has a -~ substantially closed channel portion and two flanges 'projecting outwardly~one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length :, :: : :
of said post and bent backwards to present the wire cutting on the edges.
~:
,:
' ~ ' ' ' ', ' 36~3 Fencing wires are normally attached to these previously known steel posts by means of staple which is driven or hammered into the post groove. This has the disadvantage of usually requiring a special tool, such as co-mpressed air staple gun, to drive the staple into the gr~ove. Use of manual means, such as a hammer, results in problems of holding the post rigid and the resilience of the post groove lips.
A further problem with known systems is that insertion of the ~taple results in expansion or spreading of the groove lips at and adjacent to the point of insertion. This expansion makes the insertion of staples adjacent to each other extr~mely difficult as the retention force applied by the groove lips to the staples is reduced and can result in loose staples and poor retention of fencing wires. It has been found that staples must be spaced by at least 10 cm in order maintain reasonable retention by the groove lips.
A further disadvantage is that with time and movement of the fence wires the staples become loose and may slide within the groove or come loose altogether.
DISCLOS _ OF INVENTION
. An object of the present lnvention is to provide a clip faste.ner which overcomes at least some of these dis-advantages and provides a simple clip which is inexpensive to manufacture and can be installed by thumb pressure or with a hand tool using only hand pressure.
~ ,:
3L~S1~ 8 According to a first aspect, the present invention consists in a clip fastener, for use with a post of the kind hereinbefore described, comprising:
a retaining portion adapted to abut the post adjacent the post groove so as to provide a flange adapted to retain a member said retaining portion exterlding laterally of an anchor portion, said anchor portion adapted to be inserted into the post groove and having a resilient barb means adapted to engage the inner wall of the post groove.
The resilient barb means preferably ~omprises ~
tongue cut from the anchor portion to form a prong or detente extending at angle thereto. The end of the prong is preferably crescent shaped to produce two sharp edge points which engage with the inner wall of the post groove.
Accordi~g to a second aspect, the invention comprises in combination:
a post comprising a substantially closed channel portion and two flanges projecting outwardly one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length o said post, and a fastener comprising, a retaining portion abutting said flanges ad~acent said channel portion and forming a flange adapted to retain a member, : ~
, .. -6~3 ~, and an anchor portion extending laterally of said wire retaining portion and inserted between the lips of the post having a resilient barb means engaging the inner wall of the post channel.
According to a third aspect, the invention comprises a method of constructing a ence including the steps of:
clamping a fencing wire or mesh to a fence post having a longitudinally extending grooved hollow by means of the clip fastener according to the first aspect.
BRIEF DESCRIPTION OF DRAWINGS
A preferred embodiment of the invention will now be described by way of example only, with reference to the accompanying drawings in which:
~ igurP 1 is a side elevation of the clip fastener according to the invention;
~; Figure 2 is an end elevation of the clip fastener shown in Figure l;
Figure 3 is a side elevation of a clip fastener :~ according to a further embodiment of the invention;
Figure 4 is a plan view of a ~ence post with the clip fastener according to the invention in place;
Figure 5 is a front view of the fence post showing ~the clip fastener with fence wire attached.
Figure 6 is a perspective view of the clip fastener according ~o the invention showing an angled retention means;
... ..
~:
-.
~,2;~
BEST MODE FOR CARRYING OUT TH~ I~VENTION
Referring to the drawings, the clip fastener is preferably manufactured in one piece from sheet spring steel of approximately l-1.5mm thickness, however other resili~nt materials such as plasti~ could be usea. The clip has an anchor portion ] and ~ retaining portion 2 extending laterally thereto as shown in Figures 1 ana 2.
A resilient barb is formed by cutting and pressing out a tongue of material to form a prong 3. This prong preferably has a crescent-shaped free end 5.
The retaining portion 2 has a semi-circular deformation ~ 4 to enable the retention of the fence wire or the like.
; Figure 3 shows a dual anchorage type arrangement wherein the retaining deformation 4 links the two anchor portions 1.
In use, as shown in ~igures 4 and 5, the anchor portion 1 is aligned with the groove of the fence post formed by lips 8 of the closed channel fence post 6. ~he !
anchor portion is then pressed using only thumb pressure into the groove. Barb 3 is resiliently deformed as the anchor portion enters the groove being compressed by the `lips 8 of the post groove. Barb 3 is arranged to be biased outwardly to engage with the inner wall 9 of the post. The fastener is held in clip ~ngagement between the barb 3 engaging the interior wall 9 and the retaining portion 2 abut.ing the out-ardly extending flanges 7 of ,~
..
the post. The dimensions of the clip fastener are arranged such that the clip is firmly held by the resilient force applied by the barb 3. Further, the barb 3 will oppose any force applied to remove the clip fastener from the groove.
In order to improve resistance to movement along the length of the groove by the clip fastener the barb preferably has a crescent-shaped free end 5 to form points which engage with, and may even deform the inner surface 9 of the groove. These points greatly increase the resistance of the fastener, once inserted, to translation longitudinally along the post groove.
Further resistance to movement of the fastener may be provided by forming two inwardly extending barbs at the junction of the anchor portion and the retaining portion. These barbs are arranged to engage with the surface of the post on insertion of the clip and resist movement of the cllp relatlve to th~ post. Barbs can also be formed on the~flat surfaces of the clip by burst punching holes therein to produce a ragged edged hole.
These edges again engage with the surface of the post to resist movement of the clip.
Resistance to movement by the clip along the length of the post groove may be further increased by roughening of the inner surface 9 of the groove. This is done by providing a plurality of deformations along this surface for interengagement with the barb 3 of the clip. These .. . .
, ' ,, '~':
deformations are preferably provided by rolling the post me~ber, before it is formed into its specific cross-sectional shape, with spiked rollers which score or deform the surface of the post member. This rolling is confined to an area of the post ~ember which will form the inner surface of the post once it is formed into its cross-sectional shape.
Figure 5 shows the clip being used to retain barbed wire 10, however the clip is not limited to use with fencing wire and may be used with any form of elongated member. Other possible uses would include mounting of conductive wires for use with electric fences and having insulators which would be retained by the clip.
Figure 6 is a perspective view of a clip fastener with an angled wire retention means~ Such a fastener is used ~or cross mesh or diamond mesh fences. The si7e and thickn~ss of the fasteners can be varied according to their required purpose.
The clip fastener is preferably manufactured by a single stamping and pressing fro~ a sheet of resilient material.
Whilst the embodiments of the present invention have been described with reference to a post have a particular cross-sectional shape it will be apparent to those skilled in the art that the clip fastener of the present invention may be used in conjunction with fence posts having different cross-se~tional shapes. It will also be ~..
' ', apparent that other embodiments of the invention described are possible without departing from the spirit or scope of the invention.
:
: . :
, ~ . - .
,. ..
Claims (12)
1. A clip fastener, for use with a post having a substantially closed channel portion and two flanges projecting outwardly one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length of said post, comprising:
a retaining portion adapted to abut the post adjacent an opening of the post channel to as to provide a flange adapted to retain a member, said retaining portion extending substantially normal to an anchor portion, said anchor portion adapted to be inserted into the post channel and having a resilient barb means adapted to engage an inner wall of the post channel, said resilient barb means comprising a tongue cut from said anchor portion to form a prong or detente extending at an angle thereto, a free end of said prong being crescent-shaped so as to produce one or more points adapted to engage with the inner wall of the post channel.
a retaining portion adapted to abut the post adjacent an opening of the post channel to as to provide a flange adapted to retain a member, said retaining portion extending substantially normal to an anchor portion, said anchor portion adapted to be inserted into the post channel and having a resilient barb means adapted to engage an inner wall of the post channel, said resilient barb means comprising a tongue cut from said anchor portion to form a prong or detente extending at an angle thereto, a free end of said prong being crescent-shaped so as to produce one or more points adapted to engage with the inner wall of the post channel.
2. A clip fastener according to claim 1 having two or more anchor portions each joined to one another by a said retaining portion.
3. A clip fastener according to claims 1 or 2 wherein said flange has a semi-circular deformation adapted to retain a fence wire or the like.
4. A clip fastener according to claims 1 or 2 further including one or more inwardly extending barbs located at the junction of the anchor portion and the retaining portion and adapted to engage with the surface of the post on insertion of the clip into the post channel.
5. A clip fastener according to claim 1 including one or more inwardly extending engagement means located on the surface of said retaining portion and adapted to engage with the surface of the post on insertion of the clip into the post channel.
6. A clip fastener according to claim 5 wherein said engagement means comprises a burst punched hole formed in the surface of the retaining portion, the ragged edges of the hole adapted to engage with the surface of the post.
7. A fastening assembly, comprising in combination:
a post comprising a substantially closed channel portion and two flanges projecting outwardly one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length of said post, and a clip fastener comprising:
a retaining portion abutting said flanges adjacent said channel portion and forming a further flange adapted to retain a member, and an anchor portion extending substantially normal to said retaining portion and inserted between the lips of the post, said anchor portion having a resilient barb means engaging an inner wall of the channel portion, said resilient barb means comprising a tongue cut from said anchor portion to form a prong or detente extending at an angle thereto, a free end of said prong being crescent-shaped so as to produce one or more points adapted to engage with the inner wall of the channel portion.
a post comprising a substantially closed channel portion and two flanges projecting outwardly one with respect to the other from respective edges of said channel portion to define two respective lips extending substantially along the length of said post, and a clip fastener comprising:
a retaining portion abutting said flanges adjacent said channel portion and forming a further flange adapted to retain a member, and an anchor portion extending substantially normal to said retaining portion and inserted between the lips of the post, said anchor portion having a resilient barb means engaging an inner wall of the channel portion, said resilient barb means comprising a tongue cut from said anchor portion to form a prong or detente extending at an angle thereto, a free end of said prong being crescent-shaped so as to produce one or more points adapted to engage with the inner wall of the channel portion.
8. A fastening assembly according to claim 7 wherein the inner wall of said channel portion is roughened to increase engagement with said barb means.
9. A fastening assembly according to claim 7 wherein the inner wall of said channel portion is provided with a plurality of deformations for interengagement with said barb means.
10. A fastening assembly according to any one of claims 7, 8 or 9 wherein said member is a fencing wire.
11. A fastening assembly according to any one of claims 7, 8 or 9 wherein said member is a sign plate.
12. A method of constructing a fence including the step of:
clamping a fencing wire or mesh to a fence post having a longitudinally extending grooved hollow by means of the clip fastener according to claim 1.
clamping a fencing wire or mesh to a fence post having a longitudinally extending grooved hollow by means of the clip fastener according to claim 1.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPHO2789 | 1985-10-08 | ||
| AU278985 | 1985-10-08 | ||
| AUPH3019 | 1985-10-22 | ||
| AU301985 | 1985-10-22 | ||
| AU427086 | 1986-01-20 | ||
| AUPH4270 | 1986-01-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1268648A true CA1268648A (en) | 1990-05-08 |
Family
ID=27151450
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000519449A Expired - Fee Related CA1268648A (en) | 1985-10-08 | 1986-09-30 | Clip fastener |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0238563A1 (en) |
| CA (1) | CA1268648A (en) |
| WO (1) | WO1987002429A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1124195A (en) * | 1966-06-27 | 1968-08-21 | Instron Corp | Materials testing |
| FR2134783A5 (en) * | 1971-04-20 | 1972-12-08 | Cerca | |
| FR2210286A5 (en) * | 1972-12-07 | 1974-07-05 | Creusot Loire | |
| US3948091A (en) * | 1973-05-24 | 1976-04-06 | Centre De Recherches Metallurgiques - Centrum Voor Research In De Metallurgie | Apparatus for determining the properties of metallic materials |
| FR2491213A1 (en) * | 1980-09-30 | 1982-04-02 | Agronomique Inst Nat Rech | Stress and strain measuring appts. for e.g. food sample - has electronically controlled mobile assembly driven by linear motor providing strain which is measured as function of time |
-
1986
- 1986-09-30 CA CA000519449A patent/CA1268648A/en not_active Expired - Fee Related
- 1986-10-07 WO PCT/AU1986/000293 patent/WO1987002429A1/en unknown
- 1986-10-07 EP EP19860905688 patent/EP0238563A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0238563A1 (en) | 1987-09-30 |
| WO1987002429A1 (en) | 1987-04-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |