EP2646338B1 - Cable tie and method to produce a cable tie - Google Patents
Cable tie and method to produce a cable tie Download PDFInfo
- Publication number
- EP2646338B1 EP2646338B1 EP20110794335 EP11794335A EP2646338B1 EP 2646338 B1 EP2646338 B1 EP 2646338B1 EP 20110794335 EP20110794335 EP 20110794335 EP 11794335 A EP11794335 A EP 11794335A EP 2646338 B1 EP2646338 B1 EP 2646338B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strip
- locking
- passage
- cable tie
- head
- 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.)
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Links
- 238000000034 method Methods 0.000 title claims description 17
- 239000004033 plastic Substances 0.000 claims description 9
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000012815 thermoplastic material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D63/00—Flexible elongated elements, e.g. straps, for bundling or supporting articles
- B65D63/10—Non-metallic straps, tapes, or bands; Filamentary elements, e.g. strings, threads or wires; Joints between ends thereof
- B65D63/1018—Joints produced by application of integral securing members, e.g. buckles, wedges, tongue and slot, locking head and teeth or the like
- B65D63/1027—Joints produced by application of integral securing members, e.g. buckles, wedges, tongue and slot, locking head and teeth or the like the integral securing member being formed as a female and male locking member, e.g. locking head and locking teeth, or the like
- B65D63/1036—Joints produced by application of integral securing members, e.g. buckles, wedges, tongue and slot, locking head and teeth or the like the integral securing member being formed as a female and male locking member, e.g. locking head and locking teeth, or the like the female locking member being provided with at least one metal barb
- B65D63/1054—Joints produced by application of integral securing members, e.g. buckles, wedges, tongue and slot, locking head and teeth or the like the integral securing member being formed as a female and male locking member, e.g. locking head and locking teeth, or the like the female locking member being provided with at least one metal barb with barbs situated on opposite sides of, or concentrically in, the female locking member
Definitions
- the present invention relates to a cable tie and to a method for producing a cable tie.
- the present invention relates to a cable tie made of plastic material of the type comprising: a ribbon, i.e. a strip having an elongated flat shape, and a strip locking head stably connected to an end of the strip and comprising, in turn, a structure defining a strip locking passage, and strip locking means which are arranged adjacent to the strip locking passage, so as to allow the coupling of a free end of the strip in the locking passage in a first direction, and prevent the extraction of the strip from the locking passage in a second direction opposite to the first direction.
- a ribbon i.e. a strip having an elongated flat shape
- a strip locking head stably connected to an end of the strip and comprising, in turn, a structure defining a strip locking passage, and strip locking means which are arranged adjacent to the strip locking passage, so as to allow the coupling of a free end of the strip in the locking passage in a first direction, and prevent the extraction of the strip from the locking passage in a second direction opposite to the first direction
- the strip locking means typically comprise a tooth or metallic locking plate, which is driven/fixed into the locking head by means of an ultrasound fixing/welding process so as to protrude into the locking passage.
- the cable ties of the type described above being about 1.05 mm thick and about 3.5 mm wide; about 1.2 mm thick and about 4.5 mm wide; about 1.4 mm thick and about 7.5 mm wide, are adapted to be ripped and/or torn, i.e. are subject to collapsing and uncoupling of the strip from the locking head, when the strip itself is subjected to a traction force opposite to the locking force exerted by the metallic plate on the strip and equal to about 200 Newton, 400 Newton and 650 Newton, respectively.
- WO2004044871 discloses a tie-type security seal comprising a body of thermoplastic material with a passage therethrough, a metallic insert element that is fixed in the passage and has at least one opening therewith, as well as a locking tooth.
- An elongated strip of thermoplastic material is integral, at one end, with the body and has another free end for insertion through the passage in a first direction where it is locked by the tooth against removal from the cavity in the opposite direction, the body and strip having been manufactured by a plastic injection operation.
- EP1258432 discloses a two piece cable tie having an improved metal locking device anchoring system wherein the cable tie includes a strap including a first end and a free end and a locking head secured to the first end of the strap that defines a strap accepting channel in the head having a strap entry end and a strap exit end.
- the locking head further includes a metal locking device receiving cavity adjacent to and open toward the strap exit end of the locking head and a mounting slot having an inner support wall, an outer support wall and a support slot communicating the mounting slot with the receiving cavity.
- number 1 indicates as a whole a cable tie structured so that, in use, it is operable to be closed as a loop to bind/fix objects to one another, such as for example electric wires, tubular pipes or similar elements.
- Cable tie 1 comprises a flexible ribbon having an elongated flat shape, i.e. a strip. 2, and a strip locking head 3 stably connected to an end of the strip 2 and comprising a structure defining a strip locking channel, i.e. passage 4, and strip locking means which are arranged adjacent to the strip locking passage 4, so as to allow the coupling of strip 2 in the strip locking passage 4 in a first direction K1, and prevent the extraction of strip 2 from the locking passage 4 in a second direction K2 opposite to the first direction K1.
- strip 2 extends along a first longitudinal axis A and has a predetermined thickness s.
- Strip 2 has a rectangular elongated shape, a distal end 2a stably fixed to the body of the strip locking head 3, and a free end 2b shaped so as to be coupled, in use, to the locking head 3.
- the strip locking head 3 centrally has a through opening/ locking channel, i.e. locking passage 4 having an inlet portion 4a, within which the free end 2a of strip 2 is able to be engaged, and an outlet portion 4b, from which the free end 2b of strip 2 is adapted to protrude when strip 2 is engaged in the locking passage 4.
- locking passage 4 having an inlet portion 4a, within which the free end 2a of strip 2 is able to be engaged, and an outlet portion 4b, from which the free end 2b of strip 2 is adapted to protrude when strip 2 is engaged in the locking passage 4.
- the locking channel/passage 4 extends along a second axis B substantially orthogonal to the first longitudinal axis A, has a transversal portion substantially complementary to the transversal portion of strip 2, preferably, but not necessarily, rectangular and is developed on a middle line M orthogonal to the first axis A.
- the strip locking means of the strip locking head 3 comprise a locking insert 5, which is provided with an annular plate 6 stably incorporated in the body of the strip locking head 3 between the inlet portion 4a and the outlet portion 4b of the locking passage 4.
- the locking insert 5 is further shaped so as to have a pair of fins/teeth indicated hereinafter as flexible/elastic locking plates 7, which stick out from the inner edge of the annular plate 6 towards each other so as to at least partially protrude within the locking passage 4.
- the locking insert 5 is further shaped so that the locking plates 7 are aligned with each other and with the longitudinal axis A so that, in use, when strip 2 is engaged in the locking passage 4, the two free ends 7a of the locking plates 7 abut on the two larger faces/surfaces 2c of strip 2, so as to allow the strip to slide within the locking passage 4 in the first direction K1, while clamping the larger faces/surfaces 2c of strip 2 when a traction force towards the second direction K2 is applied thereon.
- the locking insert 5 is interposed within the locking head 3 between a lower discoid potion 3a and an upper discoid portion 3b, both shaped so as to centrally have the inlet portion 4a and the outlet portion 4b of the locking passage 4, respectively.
- the fins or locking plates 7 of the locking insert 5 are arranged on opposite sides of the middle line M, on respective planes, which are inclined with respect to the second axis B of the locking passage 4 and which intersect at the outlet portion 4b of the locking passage 4.
- the strip locking head 3 is further shaped so as to have a pair of protrusions 8 within the inlet portion 4a, underneath the locking plates 7, each protrusion having a saw toothed end 8a arranged in contact with a respective plate 7 and defining, along with the plate 7 itself, a stop ratchet 12 capable of preventing the backward motion of strip 2 within the locking passage 4 in the second direction K2.
- the locking insert 5, i.e. annular plate 6 and plates 7 of the cable tie 1 are advantageously made of flexible, elastic metallic material, while the body of the locking head 3 and the strip 2 are made of plastic material or the like, such as for example thermoplastic material.
- the locking insert 5, i.e. annular plate 6 and plates 7 may be obtained by means of a stamping/shearing process of a small plate made of metallic material.
- the upper discoid portion 3b of the locking head 3 has two seats 10, which are arranged on opposite sides of the middle line M over the two saw toothed ends 8a of protrusions 8. and are dimensioned so that each accommodates a tooth or locking plate 7 therein.
- Each seat 10 is obtained on the upper discoid portion 2b so as to be closed at one end towards the outer peripheral edge of the upper discoid portion 2b and open at the top and at the opposite end, so as to communicate with the outlet portion 4b of the locking passage 4.
- Each seat 10 is further dimensioned so as to allow the locking plate 7 to partially bend inside, so as to space apart the free end 4a and the free end 4a of the other locking plate 7 when engaging strip 2 in the strip locking passage 4.
- each protrusion 8 extends within the strip locking passage 8 parallel to axis B, has a substantially rectangular cross section, and is dimensioned to have a transversal width with respect to the second axis B smaller than the width of the corresponding seat 10.
- Each protrusion 8 is further dimensioned so as to have a transversal width smaller than or equal to the width of the respective locking plate 7.
- the free ends of the locking plates 7 advantageously have square edges and at least partially protrude into the locking passages 8 so as to have a distance d which approximates by defect the thickness s of strip 2.
- each locking plate 7 is inclined with respect to the laying plane of the annular plate 6 by an angle ⁇ between 85 and 120°.
- Each locking plate 7 is preferably inclined with respect to the annular plate 6 by an angle of 90°.
- the locking head 2 has a transversal section of circular/elliptic shape, while the locking insert 5 is shaped so as to have an outer peripheral edge of substantially circular/elliptic shape having dimensions which approximate by defect corresponding dimensions of the locking head 3, so that the latter completely contains the locking insert 5 therein.
- the free end 2b of strip 2 has a substantially triangular shape and has two rectangular cavities on the larger surfaces 2c, having a width which approximates by excess the width of the blocking plates 7.
- the method essentially includes implementing an injection molding procedure for the tie in which the locking insert 5 is incorporated in the strip locking head 3.
- the method includes arranging a tie forming mold 15, which comprises two metallic casings 16 and 17, which are intended to abut against each other and are structured so as to form, in the middle of the contact surface between the casings 16 and 17, at least one closed impression 18 shaped so as to negatively trace the shape of one or more cable ties 1 of the above-described type.
- the method essentially includes:
- the method for producing cable ties may include:
- the method for producing cable ties may include an internally shaped mould so as to have a plurality of impressions, i.e. a comb of impressions arranged side-by-side so as to produce, at each injection cycle, a plurality of cable ties ( figure 8 ).
- a die i.e. a strip of locking inserts 5 dimensioned so as to place each locking insert 5 at the portion of a corresponding impression intended to form the strip locking head 3
- a die i.e. a strip of locking inserts 5 dimensioned so as to place each locking insert 5 at the portion of a corresponding impression intended to form the strip locking head 3
- the structure of the locking insert in which the annular plate "embedded" in the locking head and its opposite metallic plates are used allows the traction force which can be exerted on the strip when wiring to be significantly increased.
- ties being about 1.05 mm thick and 3.5 mm wide; about 1.2 mm thick and 4.5 mm wide; about 1.4 mm thick and about 7.5 mm wide, may be subjected to a traction force of about 270 Newton, 400 Newton and 850 Newton, respectively.
- the method for producing the tie is highly rapid and simple as the incorporation of the locking insert in the tie occurs when molding the same, and does not thus require any additional step of fixing/welding the teeth onto the locking head.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Package Frames And Binding Bands (AREA)
- Installation Of Indoor Wiring (AREA)
Description
- The present invention relates to a cable tie and to a method for producing a cable tie.
- In particular, the present invention relates to a cable tie made of plastic material of the type comprising: a ribbon, i.e. a strip having an elongated flat shape, and a strip locking head stably connected to an end of the strip and comprising, in turn, a structure defining a strip locking passage, and strip locking means which are arranged adjacent to the strip locking passage, so as to allow the coupling of a free end of the strip in the locking passage in a first direction, and prevent the extraction of the strip from the locking passage in a second direction opposite to the first direction.
- In particular, the strip locking means typically comprise a tooth or metallic locking plate, which is driven/fixed into the locking head by means of an ultrasound fixing/welding process so as to protrude into the locking passage.
- In the production of cable ties of the type described above, it is known the need to improve the mechanical performance of the cable tie while maintaining the dimensions thereof unchanged in order to increase the traction forces which can be exerted on the tie during the step of wiring, e.g. by means of automatic or semi-automatic wiring guns, but ensuring however the integrity and hold of the tie itself during such an operation and upon the completion of the same.
- Indeed, studies carried out by the applicant demonstrated that the cable ties of the type described above, being about 1.05 mm thick and about 3.5 mm wide; about 1.2 mm thick and about 4.5 mm wide; about 1.4 mm thick and about 7.5 mm wide, are adapted to be ripped and/or torn, i.e. are subject to collapsing and uncoupling of the strip from the locking head, when the strip itself is subjected to a traction force opposite to the locking force exerted by the metallic plate on the strip and equal to about 200 Newton, 400 Newton and 650 Newton, respectively.
- Indeed, from the aforesaid studies, it arises that the following technical drawbacks occur by applying a traction force higher than the threshold limits indicated above on the strip of the above-described ties:
- shearing/tearing of the strip by the locking plate;
- plastic deformation of the strip, with consequent loosening of the locking of the tie on the objects;
- deformation and/or rotation of the metallic plate about its fixing point on the locking head, with consequent opening of the tie.
-
WO2004044871 discloses a tie-type security seal comprising a body of thermoplastic material with a passage therethrough, a metallic insert element that is fixed in the passage and has at least one opening therewith, as well as a locking tooth. An elongated strip of thermoplastic material is integral, at one end, with the body and has another free end for insertion through the passage in a first direction where it is locked by the tooth against removal from the cavity in the opposite direction, the body and strip having been manufactured by a plastic injection operation. -
EP1258432 discloses a two piece cable tie having an improved metal locking device anchoring system wherein the cable tie includes a strap including a first end and a free end and a locking head secured to the first end of the strap that defines a strap accepting channel in the head having a strap entry end and a strap exit end. The locking head further includes a metal locking device receiving cavity adjacent to and open toward the strap exit end of the locking head and a mounting slot having an inner support wall, an outer support wall and a support slot communicating the mounting slot with the receiving cavity. - The applicant conducted an in-depth study with the objective of identifying a solution which specifically allows to:
- make a cable tie structured so as to improve the mechanical performance of the known ties, so as to ensure integrity and hold thereof when subjected to traction forces higher than those shown above;
- provide a method for making a cable tie, which method is simple and rapid to be implemented and which meets the aforesaid needs.
- It is thus the object of the present invention to provide a solution which allows to achieve the objectives indicated above.
- This object is achieved by the present invention in that it relates to a cable tie and to a method for producing a cable tie, as defined in the appended claims.
- The present invention will now be described with reference to the accompanying drawings, which show a non-limitative embodiment thereof, in which:
-
figure 1 is a plan view of a cable tie made according to the present invention; -
figure 2 is a perspective bottom view of a portion of the cable tie shown infigure 1 ; -
figure 3 shows an enlargement of the portion of the cable tie, in which the locking insert incorporated in the locking head is shown with a dashed line; -
figure 4 is a longitudinal section I-I of a portion of the cable tie shown infigure 2 ; -
figure 5 is a cross section taken along II-II of a portion of the cable tie shown infigure 2 ; -
figure 6 is a perspective view of the locking insert; whereas -
figures 7-9 schematically show a forming mould for the cable tie, in an equal number of operative steps of the injection molding procedure included in the method provided by the present invention. - With reference to
figures 1-5 ,number 1 indicates as a whole a cable tie structured so that, in use, it is operable to be closed as a loop to bind/fix objects to one another, such as for example electric wires, tubular pipes or similar elements. -
Cable tie 1 comprises a flexible ribbon having an elongated flat shape, i.e. a strip. 2, and astrip locking head 3 stably connected to an end of thestrip 2 and comprising a structure defining a strip locking channel, i.e.passage 4, and strip locking means which are arranged adjacent to thestrip locking passage 4, so as to allow the coupling ofstrip 2 in thestrip locking passage 4 in a first direction K1, and prevent the extraction ofstrip 2 from thelocking passage 4 in a second direction K2 opposite to the first direction K1. - In the example shown in
figures 1 and4 ,strip 2 extends along a first longitudinal axis A and has a predetermined thickness s. -
Strip 2 has a rectangular elongated shape, adistal end 2a stably fixed to the body of thestrip locking head 3, and afree end 2b shaped so as to be coupled, in use, to thelocking head 3. - With reference to
figure 4 , thestrip locking head 3 centrally has a through opening/ locking channel, i.e.locking passage 4 having aninlet portion 4a, within which thefree end 2a ofstrip 2 is able to be engaged, and anoutlet portion 4b, from which thefree end 2b ofstrip 2 is adapted to protrude whenstrip 2 is engaged in thelocking passage 4. - In the examples shown in the accompanying figures, the locking channel/
passage 4 extends along a second axis B substantially orthogonal to the first longitudinal axis A, has a transversal portion substantially complementary to the transversal portion ofstrip 2, preferably, but not necessarily, rectangular and is developed on a middle line M orthogonal to the first axis A. - The strip locking means of the
strip locking head 3 comprise alocking insert 5, which is provided with anannular plate 6 stably incorporated in the body of thestrip locking head 3 between theinlet portion 4a and theoutlet portion 4b of thelocking passage 4. - The
locking insert 5 is further shaped so as to have a pair of fins/teeth indicated hereinafter as flexible/elastic locking plates 7, which stick out from the inner edge of theannular plate 6 towards each other so as to at least partially protrude within thelocking passage 4. - The
locking insert 5 is further shaped so that thelocking plates 7 are aligned with each other and with the longitudinal axis A so that, in use, whenstrip 2 is engaged in thelocking passage 4, the twofree ends 7a of thelocking plates 7 abut on the two larger faces/surfaces 2c ofstrip 2, so as to allow the strip to slide within thelocking passage 4 in the first direction K1, while clamping the larger faces/surfaces 2c ofstrip 2 when a traction force towards the second direction K2 is applied thereon. - The
locking insert 5 is interposed within thelocking head 3 between alower discoid potion 3a and an upperdiscoid portion 3b, both shaped so as to centrally have theinlet portion 4a and theoutlet portion 4b of thelocking passage 4, respectively. - The fins or
locking plates 7 of thelocking insert 5 are arranged on opposite sides of the middle line M, on respective planes, which are inclined with respect to the second axis B of thelocking passage 4 and which intersect at theoutlet portion 4b of thelocking passage 4. - The
strip locking head 3 is further shaped so as to have a pair ofprotrusions 8 within theinlet portion 4a, underneath thelocking plates 7, each protrusion having a sawtoothed end 8a arranged in contact with arespective plate 7 and defining, along with theplate 7 itself, astop ratchet 12 capable of preventing the backward motion ofstrip 2 within thelocking passage 4 in the second direction K2. - In the example shown in
figures 1-5 , the locking insert 5, i.e.annular plate 6 andplates 7 of thecable tie 1 are advantageously made of flexible, elastic metallic material, while the body of thelocking head 3 and thestrip 2 are made of plastic material or the like, such as for example thermoplastic material. - In particular, the locking insert 5, i.e.
annular plate 6 andplates 7 may be obtained by means of a stamping/shearing process of a small plate made of metallic material. - The
upper discoid portion 3b of thelocking head 3 has twoseats 10, which are arranged on opposite sides of the middle line M over the two sawtoothed ends 8a ofprotrusions 8. and are dimensioned so that each accommodates a tooth orlocking plate 7 therein. - Each
seat 10 is obtained on theupper discoid portion 2b so as to be closed at one end towards the outer peripheral edge of theupper discoid portion 2b and open at the top and at the opposite end, so as to communicate with theoutlet portion 4b of thelocking passage 4. Eachseat 10 is further dimensioned so as to allow thelocking plate 7 to partially bend inside, so as to space apart thefree end 4a and thefree end 4a of theother locking plate 7 when engagingstrip 2 in thestrip locking passage 4. - In the example shown in
figures 1-5 , eachprotrusion 8 extends within thestrip locking passage 8 parallel to axis B, has a substantially rectangular cross section, and is dimensioned to have a transversal width with respect to the second axis B smaller than the width of thecorresponding seat 10. Eachprotrusion 8 is further dimensioned so as to have a transversal width smaller than or equal to the width of therespective locking plate 7. - With reference to the example shown in
figures 4 and6 , the free ends of thelocking plates 7 advantageously have square edges and at least partially protrude into thelocking passages 8 so as to have a distance d which approximates by defect the thickness s ofstrip 2. - In the example shown in
figure 6 , eachlocking plate 7 is inclined with respect to the laying plane of theannular plate 6 by an angle α between 85 and 120°. Eachlocking plate 7 is preferably inclined with respect to theannular plate 6 by an angle of 90°. - In the example shown in
figure 3 , thelocking head 2 has a transversal section of circular/elliptic shape, while thelocking insert 5 is shaped so as to have an outer peripheral edge of substantially circular/elliptic shape having dimensions which approximate by defect corresponding dimensions of thelocking head 3, so that the latter completely contains thelocking insert 5 therein. - In the example shown in
figure 1 , thefree end 2b ofstrip 2 has a substantially triangular shape and has two rectangular cavities on thelarger surfaces 2c, having a width which approximates by excess the width of theblocking plates 7. - The method for producing the above-described
cable tie 1 is described below. - The method essentially includes implementing an injection molding procedure for the tie in which the
locking insert 5 is incorporated in thestrip locking head 3. - With reference to
figures 7-9 , the method includes arranging atie forming mold 15, which comprises twometallic casings casings impression 18 shaped so as to negatively trace the shape of one ormore cable ties 1 of the above-described type. - The method essentially includes:
- cyclically abutting the
metallic casings impression 18 which negatively traces the shape of thecable ties 1 to be produced; and - at each cycle, injecting plastic material in liquid state into the closed
impression 18 of the formingmould 15 in a controlled manner through an injection device (not shown). - With reference to
figures 7-9 , the method for producing cable ties may include: - opening the forming
mould 15 so as to separate the twocasings 16 and 17 (figure 7 ) from each other; - positioning the locking insert 5 in the portion of the impression intended to form the
strip locking head 3; thelocking insert 5 may be positioned in the impression by means of an external handling member 45 (figure 8 ); - abutting the
casings mould 15; in particular,casings - injecting the plastic material in liquid state into the closed
impression 18 so as to stably embed/incorporate thelocking insert 5 within the locking head; - separating the casings so as to open the forming mould;
- extracting
cable tie 1 from the formingmould 15 by means of the external handling member 45 (figure 9 ). - From the above, it is apparent that the method for producing cable ties may include an internally shaped mould so as to have a plurality of impressions, i.e. a comb of impressions arranged side-by-side so as to produce, at each injection cycle, a plurality of cable ties (
figure 8 ). Here, at each injection cycle, a die (i.e. a strip of lockinginserts 5 dimensioned so as to place each lockinginsert 5 at the portion of a corresponding impression intended to form the strip locking head 3) may be positioned in the mould. - The advantages that the present invention allows to obtain are apparent from the above description.
- Firstly, the presence of protrusions with saw toothed ends inside the locking passage and underneath the teeth or locking plates cancels out any possible deformation and/or rotation of the plate about its fixing point on the locking head, thus ensuring the tie holding.
- Furthermore, the structure of the locking insert in which the annular plate "embedded" in the locking head and its opposite metallic plates are used, allows the traction force which can be exerted on the strip when wiring to be significantly increased.
- Moreover, in addition to advantageously eliminating a step of the production process which includes the sharpening of the ends, the use of plates with free ends having square, dull edges strongly reduces the possibility for the plates to cut the strip when locked.
- In this case, the tests carried out by the applicant on the above-described tie proved that ties being about 1.05 mm thick and 3.5 mm wide; about 1.2 mm thick and 4.5 mm wide; about 1.4 mm thick and about 7.5 mm wide, may be subjected to a traction force of about 270 Newton, 400 Newton and 850 Newton, respectively.
- Additionally, the method for producing the tie is highly rapid and simple as the incorporation of the locking insert in the tie occurs when molding the same, and does not thus require any additional step of fixing/welding the teeth onto the locking head.
- It is finally apparent that changes and variations may be made to the tie and method described and shown above, without departing from the scope of the present invention as defined by the appended claims.
Claims (10)
- A cable tie (1), comprising:- a strip (2);- a strip locking head (3) stably connected to an end of the strip (2) and comprising a strip locking passage (4) and strip locking means, which are arranged adjacent to said strip looking passage (4) so as to allow the coupling of a free end (2b) of the strip (2) into the strip locking passage (4) in a first direction (K1), and prevent the extraction of the strip (2) from the strip locking passage (4) in a second direction (K2) opposite to the first direction (K1); said strip locking head (3) and said strip (2) being made of plastic material and being molding in one piece by means of an injection molding procedure, whereinsaid strip locking means comprising a metallic locking insert (5) which is incorporated in said strip locking head (3) during said injection molding procedure and comprises:- an annular plate (6), which is stably incorporated in the strip locking head (3) in a position coaxial to the strip locking passage (4);- a pair of locking plates (7), which sticks out from the annular plate (6) towards one another, so as to at least partially protrude within said strip locking passage (4);characterised in that
said strip locking head (3) is shaped so as to have a pair of protrusions (8), which are arranged within the strip locking passage (4) underneath the corresponding locking plates (7) and each has a saw toothed end (8a) arranged in contact with a respective locking plate (7) and defining, with the locking plate (7) itself, a stop ratchet (12) able of preventing the backward motion of the strip (2) within the strip locking passage (4) in said second direction (K2). - A cable tie (1) according to claim 1, wherein said locking insert (5) is interposed between a lower discoid portion (3a) and an upper discoid portion (3b) of said strip locking head (3).
- A cable tie according to claim 2, wherein said upper discoid portion (3b) has two seats (10) arranged on opposite bands by a middle line (M) of the strip locking head (3) over the two respective saw tooth ends (8a) of the protrusions (8) and are each dimensioned so as to contain a locking plate (7) therein.
- A cable tie according to any of the foregoing claims, wherein the locking plates (7) are inclined with respect to the annular plate (6) by an angle (α) comprised between 85 and 120°.
- A cable tie according to any of the foregoing claims, wherein the locking plates (7) at least partially protrude within the strip locking passage (4) so that the distance (d) between the free ends is smaller or equal to the thickness (s) of said strip (2).
- A cable tie according to any of the foregoing claims, wherein the free end (7a) of each locking plate (7) is shaped so as to have squared edges.
- A cable tie according to any of the foregoing claims, wherein the width of each protrusion (8) is smaller or equal to the width of the respective locking plate (7).
- A cable tie according to any of the foregoing claims, wherein said strip locking passage (4) comprises a first inlet portion (4a), within which the free end (2b) of the strip (2) is adapted to be engaged, and an outlet portion (4b), from which the free end (2b) of the strip (2) is adapted to protrude; said metallic insert (5) being incorporated in the strip locking head (3) so as to be arranged between said inlet portion (4a) and said outlet portion (4b) and has the locking plates (7) converging towards said outlet portion (4b).
- A cable tie according to any of the preceding claims, wherein each protrusion (8) has a transversal rectangular section having a width smaller than the width of a corresponding seat (10).
- A method to produce a cable tie (1), comprising:- a strip (2) made of plastic material;- a strip locking head (3) stably connected to an end of the strip (2) and comprising a strip locking passage (4) and strip locking means, which are arranged adjacent to said strip locking passage (4) so as to allow the coupling of a free end (2b) of the strip (2) into the strip locking passage (4) in a first direction (K1), and prevent the extraction of the strip (2) from the strip locking passage (4) in a second direction (K2) opposite to the first direction (K1); said strip locking means being provided with a locking insert (5) made of metallic material comprising:- an annular plate (6), which is stably incorporated in the strip locking head (3) in a position coaxial to the strip.locking passage (4);- a pair of locking plates (7), which sticks out from the annular plate (6) towards one another, so as to at least partially protrude within said strip locking passage (4);and wherein
said method comprises the steps of:- arranging a forming mould (15) comprising two metallic casings (16,17) able to be abuttingly carried one against the other, and structured so as to form, in the middle of the contact surface between the casings (16,17), at least one closed impression (18) shaped so as to negatively trace the shape of a cable tie (1);- positioning at least one locking insert (5) within the forming mould (15) between the two casings (16,17) at a portion of the impression intended to form the strip locking head (3);- inserting plastic material within said closed impression (18) of the forming mould (15) so that the strip (2) and the strip locking head (3) obtained at the end of the injection are molded in one piece and that the locking insert (5) remains incorporated in the strip locking head (3), said method being characterised in that said strip locking head (3) of said produced cable tie is shaped so as to have a pair of protrusions (8), which are arranged within the strip locking passage (4) underneath the corresponding locking plates (7) and each has a saw toothed end (8a) arranged in contact with a respective locking plate (7) and defining, with the locking plate (7) itself, a stop ratchet (12) able of preventing the backward motion of the strip (2) within the strip locking passage (4) in said second direction (K2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11794335T PL2646338T3 (en) | 2010-11-30 | 2011-11-29 | Cable tie and method to produce a cable tie |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO2010A000949A IT1403003B1 (en) | 2010-11-30 | 2010-11-30 | WIRING / FIXING CLAMP AND METHOD FOR THE CONSTRUCTION OF A WIRING / FIXING CLAMP. |
PCT/US2011/062439 WO2012075034A1 (en) | 2010-11-30 | 2011-11-29 | Cable tie and method to produce a cable tie |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2646338A1 EP2646338A1 (en) | 2013-10-09 |
EP2646338B1 true EP2646338B1 (en) | 2015-04-22 |
Family
ID=43743112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20110794335 Active EP2646338B1 (en) | 2010-11-30 | 2011-11-29 | Cable tie and method to produce a cable tie |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2646338B1 (en) |
DK (1) | DK2646338T3 (en) |
ES (1) | ES2541285T3 (en) |
IT (1) | IT1403003B1 (en) |
PL (1) | PL2646338T3 (en) |
WO (1) | WO2012075034A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI613017B (en) * | 2016-01-07 | 2018-02-01 | Shi Zhi Xue | Ball metal strip manufacturing method (2) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4209697A1 (en) | 2022-01-11 | 2023-07-12 | Illinois Tool Works Inc. | A cable tie arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3588961A (en) * | 1969-09-18 | 1971-06-29 | George Farago | Adjustable self-locking bundling straps |
DE19758329A1 (en) * | 1997-12-31 | 1999-07-01 | Gamaggio Schaefer Michael | cable ties |
US6530126B2 (en) * | 2001-05-15 | 2003-03-11 | Panduit Corp. | Low thread force cable tie with anchored locking device |
BR0204644B1 (en) * | 2002-11-13 | 2010-09-21 | security type seal. | |
GB0313764D0 (en) * | 2003-06-13 | 2003-07-23 | Itw Ltd | Seals |
-
2010
- 2010-11-30 IT ITTO2010A000949A patent/IT1403003B1/en active
-
2011
- 2011-11-29 WO PCT/US2011/062439 patent/WO2012075034A1/en unknown
- 2011-11-29 EP EP20110794335 patent/EP2646338B1/en active Active
- 2011-11-29 ES ES11794335.7T patent/ES2541285T3/en active Active
- 2011-11-29 DK DK11794335.7T patent/DK2646338T3/en active
- 2011-11-29 PL PL11794335T patent/PL2646338T3/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI613017B (en) * | 2016-01-07 | 2018-02-01 | Shi Zhi Xue | Ball metal strip manufacturing method (2) |
Also Published As
Publication number | Publication date |
---|---|
WO2012075034A1 (en) | 2012-06-07 |
DK2646338T3 (en) | 2015-07-27 |
EP2646338A1 (en) | 2013-10-09 |
PL2646338T3 (en) | 2015-09-30 |
ITTO20100949A1 (en) | 2012-05-31 |
ES2541285T3 (en) | 2015-07-17 |
IT1403003B1 (en) | 2013-09-27 |
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