GB2097053A - Plastics tie - Google Patents

Plastics tie Download PDF

Info

Publication number
GB2097053A
GB2097053A GB8112437A GB8112437A GB2097053A GB 2097053 A GB2097053 A GB 2097053A GB 8112437 A GB8112437 A GB 8112437A GB 8112437 A GB8112437 A GB 8112437A GB 2097053 A GB2097053 A GB 2097053A
Authority
GB
United Kingdom
Prior art keywords
strap
head
aperture
pawl
tie
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.)
Withdrawn
Application number
GB8112437A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bowthorpe Hellerman Ltd
Original Assignee
Bowthorpe Hellerman Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bowthorpe Hellerman Ltd filed Critical Bowthorpe Hellerman Ltd
Priority to GB8112437A priority Critical patent/GB2097053A/en
Priority to DE19828210368 priority patent/DE8210368U1/en
Priority to IT2164482U priority patent/IT8221644V0/en
Priority to FR8206956A priority patent/FR2504611A3/en
Publication of GB2097053A publication Critical patent/GB2097053A/en
Withdrawn legal-status Critical Current

Links

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
    • B65D63/1063—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 plastic barb
    • B65D63/1072—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 plastic barb the barb having a plurality of serrations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/08—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing
    • F16L3/12—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing
    • F16L3/137—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets substantially surrounding the pipe, cable or protective tubing comprising a member substantially surrounding the pipe, cable or protective tubing and consisting of a flexible band

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Package Frames And Binding Bands (AREA)
  • Clamps And Clips (AREA)

Abstract

A one-piece tie of plastics material, of the type having a toothed strap 12 and a head 14 formed, in a direction parallel to the strap, with an aperture through which the free end of the strap is insertable and a pivoted, toothed pawl 20 for engaging the inserted toothed strap to prevent retraction of the strap, is provided with a tapering tail portion 40 projecting from the head to be overlaid by the strap portion just entering the head aperture. <IMAGE>

Description

SPECIFICATION Plastics tie This invention relates to a one-piece tie of plastics material.
The tie which is the subject of British Patent 943 240 to Emery and Insuloid was the forerunner of plastics one-piece ties comprising a flexible strap having ratchet serrations on one surface for locking with transverse teeth formed on a pivoted pawl when a free end of the strap is passed through an apertured head which is at the other end of the strap and which contains the pawl, wherein any tension applied to the strap tending to withdraw it again from the aperture acts to pivot the pawl so as more firmly to grip the strap against an abutment surface opposite the pawl. The aperture through the head extends generally transverse to the plane of the strap.
Such ties have hitherto been used with widespread success in tying around bundles of electric cables or the like.
Our Patent Application 7936204 describes a flat-head construction of tie, in which the aperture through the head extends generally parallel to the plane of the strap and the pawl is correspondingly oriented. With the free end of the strap passing into the head aperture from the extreme other end of the strap, the tie lies flat about the element or elements around which it is tied. However, a gap exists below the strap just over that portion prior to entry into the head aperture. This is a drawback in certain cases, where in fact the strap is required to exert a radially inwards force, on the underlying elements, over its full tied circumference, for example where the tie is being used around a tubular rubber member to form a seal with an elongate metal element embraced by the rubber member.
In accordance with the invention, there is provided a one-piece tie of plastics material, comprising a flexible elongate strap formed on a first side thereof with a series of ratchet serrations, a head at one end of the strap and projecting from one side of the strap, an aperture extending through the head generally parallel to the plane of the strap, a pawl disposed to form a side of said aperture and being provided with a plurality of teeth, said pawl being pivotably mounted at one of its ends for movement of all its teeth in respective arcs across said aperture, said aperture being formed generally opposite said pawl with an abutment surface or surfaces, the ratchet serrations and pawl teeth being profiled so as to co-operate and permit passage of the free end of the strap through said aperture from the extreme other end of the strap when the strap is tied with said one side facing outwards but so as to prevent subsequent withdrawal of the strap in the opposite direction, any tension applied to the strap in said opposite direction serving to pivot the pawl to firmly grip the strap against the abutment surface or surfaces, and the tie further comprising a tapering tail portion projecting from said extreme other end of the strap to be overlaid by the strap portion just prior to the portion disposed through the head aperture when the tie is tied.
Accordingly, when the tie is tied, the length of the strap just prior to entry into the head lies flat upon the tail, which in turn lies flat upon the underlying tied element or elements.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:~ Figure 1 is a longitudinal section through a one-piece tie in its as-moulded condition; Figure 2 is a plan view of the tie; and Figure 3 is a cross-section through the head of the tie.
Referring to the drawing, there is shown a onepiece tie of plastics material comprising a flexible elongate strap 12 provided with a series of transverse ratchet serrations 13 on one side thereof and a generally rectangular head 14 at one end thereof, the head projecting from the serrated side of the strap. The head 14 comprises a pair of parallel side walls 1 6a, 1 6b projecting from the serrated side of the strap, and a crosspiece 18 by which a pawl 20 is pivotably mounted between the opposite side walls of the head. Thus the pawl 20 has one end united to the cross-piece 18 and extends generally parallel to the plane of the strap towards the other, free end of the strap, and spaced away from the serrated side of the strap. The pawl is provided with a series of four transverse teeth 22.
The base of the head, being the extreme end portion of the strap itself, is formed with a rectangular aperture 24 directly aligned, lengthwise of the strap, with the pawl and its cross-piece 18, as shown in Figure 1. The aperture 24 extends thafull width of the strap, being the spacing between the walls 1 6a and 166.
It will be noted that the head is effectively formed with a through-aperture, extending generally parallel to the plane of the strap in the as-moulded condition, and disposed between the base of the head and the pawl and the cross-piece 18. The width of the head aperture is slightly greater than the width of the strap; the depth of the head aperture, between the under-side of the cross-piece 18 and the upper surface of the base of the head, is slightly greater than the overall thickness of the strap. The upper surface of the base of the head is divided, by the aperture 24, into two portions 26, 26a which serve as strap abutment surfaces when the tie is tied.
The ratchet serrations 13 of the strap and the teeth 22 of the pawl are complementarily profiled as shown so as to interengage when the strap is tied (around whatever elongate element or elements are to be tied) with the serrated side of the strap facing radially outwards, and the free end of the strap is pulled through the aperture in the head from left to right as viewed in Figures 1 and 2. The head 14 is provided with a pair of guiding abutment surfaces 36a, 36b on the side walls 1 6a, 1 6b, generally parallel to the head aperture, for marginal plain portions 38a, 38b of the strap to run upon when the strap is being pulled through the head. The length of the strap serrations across the strap is greater than the width of the pawl but less than the transverse distance between the two guiding abutment surfaces.In the example, the plain marginal portions 38a, 38b are flush with the crests of the strap serrations and the guiding abutment surfaces are spaced from the strap abutment surfaces 26, 26a by slightly greater than the overall thickness of the strap.
The tie is formed with an elongate tail portion 40 lying generally in the plane of the strap in the as-mould condition of the tie, and projecting from the extreme head-end of the strap. As shown, the tail tapers in thickness in the direction away from the head, its upper surface merging with the abutment surface 26.
In use of the tie, the strap is looped around the element or elements to which it is to be applied, with the serrated side of the strap facing radially outwards. The free end of the strap is passed through the head aperture and then tension is applied to the free end of the strap, projecting from the right hand side of the head as viewed in Figure 1 , to pull the strap through the head aperture and tight around elements being tied. As the strap is pulled through the head aperture, the successive strap serrations ride over the pawl teeth, causing the pawl to repeatedly pivot away from the strap (thus opening the head aperture wider) by the inclined surfaces of the serrations sliding on the inclined surfaces of the pawl teeth, to accommodate the linear movement of the head.In this connection it will be noted that the strap serrations and pawl teeth are profiled so as to permit insertion of the strap through the head from left to right, as viewed in Figure 1, but so as to prevent withdrawal in the opposite direction.
When the tensioning force is removed from the free end of the strap, the back-tension within the looped portion thereof causes the strap to tend to move relative to the head, in the withdrawal direction. The serrations 13 accordingly lock with the pawl teeth and the back tension serves to pivot the pawl soyas to grip the strap flat against the strap abutment surfaces 26, 26a. Increasing back tension serves to increase this pivoting of the pawl and more firmly grip the strap against the strap abutment surfaces 26, 26a.
The length of strap just upstream of the entry into the head aperture overlies the tapering tail portion 40 to transmit a radial force, through this tail portion, to the underlying element or elements being tied, which are accordingly subjected to such a force over their entire circumference; The tie is manufactured by injection moulding from plastics material such as nylon, using two dies defining a mould cavity and separable in a straight line perpendicular to the plane of the strap. The aperture 24 facilitates moulding of the pawl teeth by an upwards projecting part carried by the lower of upper and lower dies.
It will be noted that the abutment surface 26a at the outlet end of the head aperture is inclined upwardly, as viewed in Figure 1, to merge with a raised, transverse rib 28. This profiling ensure that the free end of the strap, projecting from the head after the tie is tied, will project from the head in an inclined direction away from the underlying portion of the strap: thus the free, projecting end of the strap can be more easily grasped for pulling through the head to tension the tie.
In modified ties, the head may include say two pawls spaced along the aperture through the head and co-operating with the same serrated side of the strap, with a further abutment portion formed on the opposite side of the aperture between the pair of pawls. The pawls may extend in the same or opposite directions from their respective pivots, and indeed in the tie shown the pawl may be arranged to extend in the opposite direction from that shown (cross-piece 18 being repositioned and the pawl teeth being appropriately reprofiled). In any of these arrangements, the pawl or pawls may- instead be arranged in the lower side of the head and the abutment surfaces in the upper side of the head, with the strap s#errations then provided on the other side of the strap so as to face the element or elements being tied.
Claims (filed 5 April 1982) 1. A one-piece tie of plastics material, comprising a flexible elongate strap formed on a first side thereof with a series of ratchet serrations, a head at one end of the strap and projecting from one side of the strap, an aperture extending through the head generally parallel to the plane of the strap, a pawl disposed to form a side of said aperture and being provided with a plurality of teeth, said pawl being pivotably mounted at one of its ends for movement of all its teeth in respective arcs across said aperture, said aperture being formed generally opposite said pawl with an abutment surface or surfaces, the ratchet serrations and pawl teeth being profiled so as to co-operate and permit passage of the free end of the strap through said aperture from the extreme other end of the strap when the strap is tied with said one side facing outwards but so as to prevent subsequent withdrawal of the strap in the opposite direction, any tension applied to the strap in said opposite direction serving to pivot the pawl to firmly grip the strap against the abutment surface or surfaces, and the tie further comprising a tapering tail portion projecting from said extreme other end of the strap to be overlaid by the strap portion just prior to the portion disposed through the head aperture when the tie is tied.
2. A tie as claimed in claim 1, in which the
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **.
1 6a, 1 6b, generally parallel to the head aperture, for marginal plain portions 38a, 38b of the strap to run upon when the strap is being pulled through the head. The length of the strap serrations across the strap is greater than the width of the pawl but less than the transverse distance between the two guiding abutment surfaces. In the example, the plain marginal portions 38a, 38b are flush with the crests of the strap serrations and the guiding abutment surfaces are spaced from the strap abutment surfaces 26, 26a by slightly greater than the overall thickness of the strap.
The tie is formed with an elongate tail portion 40 lying generally in the plane of the strap in the as-mould condition of the tie, and projecting from the extreme head-end of the strap. As shown, the tail tapers in thickness in the direction away from the head, its upper surface merging with the abutment surface 26.
In use of the tie, the strap is looped around the element or elements to which it is to be applied, with the serrated side of the strap facing radially outwards. The free end of the strap is passed through the head aperture and then tension is applied to the free end of the strap, projecting from the right hand side of the head as viewed in Figure 1 , to pull the strap through the head aperture and tight around elements being tied. As the strap is pulled through the head aperture, the successive strap serrations ride over the pawl teeth, causing the pawl to repeatedly pivot away from the strap (thus opening the head aperture wider) by the inclined surfaces of the serrations sliding on the inclined surfaces of the pawl teeth, to accommodate the linear movement of the head.In this connection it will be noted that the strap serrations and pawl teeth are profiled so as to permit insertion of the strap through the head from left to right, as viewed in Figure 1, but so as to prevent withdrawal in the opposite direction.
When the tensioning force is removed from the free end of the strap, the back-tension within the looped portion thereof causes the strap to tend to move relative to the head, in the withdrawal direction. The serrations 13 accordingly lock with the pawl teeth and the back tension serves to pivot the pawl soyas to grip the strap flat against the strap abutment surfaces 26, 26a. Increasing back tension serves to increase this pivoting of the pawl and more firmly grip the strap against the strap abutment surfaces 26, 26a.
The length of strap just upstream of the entry into the head aperture overlies the tapering tail portion 40 to transmit a radial force, through this tail portion, to the underlying element or elements being tied, which are accordingly subjected to such a force over their entire circumference; The tie is manufactured by injection moulding from plastics material such as nylon, using two dies defining a mould cavity and separable in a straight line perpendicular to the plane of the strap. The aperture 24 facilitates moulding of the pawl teeth by an upwards projecting part carried by the lower of upper and lower dies.
It will be noted that the abutment surface 26a at the outlet end of the head aperture is inclined upwardly, as viewed in Figure 1, to merge with a raised, transverse rib 28. This profiling ensure that the free end of the strap, projecting from the head after the tie is tied, will project from the head in an inclined direction away from the underlying portion of the strap: thus the free, projecting end of the strap can be more easily grasped for pulling through the head to tension the tie.
In modified ties, the head may include say two pawls spaced along the aperture through the head and co-operating with the same serrated side of the strap, with a further abutment portion formed on the opposite side of the aperture between the pair of pawls. The pawls may extend in the same or opposite directions from their respective pivots, and indeed in the tie shown the pawl may be arranged to extend in the opposite direction from that shown (cross-piece 18 being repositioned and the pawl teeth being appropriately reprofiled). In any of these arrangements, the pawl or pawls may- instead be arranged in the lower side of the head and the abutment surfaces in the upper side of the head, with the strap s#errations then provided on the other side of the strap so as to face the element or elements being tied.
Claims (filed 5 April 1982) 1. A one-piece tie of plastics material, comprising a flexible elongate strap formed on a first side thereof with a series of ratchet serrations, a head at one end of the strap and projecting from one side of the strap, an aperture extending through the head generally parallel to the plane of the strap, a pawl disposed to form a side of said aperture and being provided with a plurality of teeth, said pawl being pivotably mounted at one of its ends for movement of all its teeth in respective arcs across said aperture, said aperture being formed generally opposite said pawl with an abutment surface or surfaces, the ratchet serrations and pawl teeth being profiled so as to co-operate and permit passage of the free end of the strap through said aperture from the extreme other end of the strap when the strap is tied with said one side facing outwards but so as to prevent subsequent withdrawal of the strap in the opposite direction, any tension applied to the strap in said opposite direction serving to pivot the pawl to firmly grip the strap against the abutment surface or surfaces, and the tie further comprising a tapering tail portion projecting from said extreme other end of the strap to be overlaid by the strap portion just prior to the portion disposed through the head aperture when the tie is tied.
2. A tie as claimed in claim 1, in which the
head is provided with two said pawls arranged one-after-the other in the direction of said aperture through the head.
3. A one-piece tie of plastics material, substantially as herein described with reference to the accompanying drawings.
GB8112437A 1981-04-22 1981-04-22 Plastics tie Withdrawn GB2097053A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB8112437A GB2097053A (en) 1981-04-22 1981-04-22 Plastics tie
DE19828210368 DE8210368U1 (en) 1981-04-22 1982-04-10 One-piece plastic tie
IT2164482U IT8221644V0 (en) 1981-04-22 1982-04-21 CLASP IN PLASTIC MATERIAL.
FR8206956A FR2504611A3 (en) 1981-04-22 1982-04-22 PLASTIC ATTACHMENT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8112437A GB2097053A (en) 1981-04-22 1981-04-22 Plastics tie

Publications (1)

Publication Number Publication Date
GB2097053A true GB2097053A (en) 1982-10-27

Family

ID=10521278

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8112437A Withdrawn GB2097053A (en) 1981-04-22 1981-04-22 Plastics tie

Country Status (4)

Country Link
DE (1) DE8210368U1 (en)
FR (1) FR2504611A3 (en)
GB (1) GB2097053A (en)
IT (1) IT8221644V0 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665588A (en) * 1983-07-20 1987-05-19 Kitagawa Industries Co., Ltd. Degaussing coil holder
GB2220979A (en) * 1988-07-18 1990-01-24 R A Smith Plastics Ltd Security band-clamp or -tie
US5197164A (en) * 1992-06-01 1993-03-30 Illinois Tool Works Inc. Quick release strap connector
US5890265A (en) * 1995-12-13 1999-04-06 Tyton Hellermann Corporation Parallel entry tie

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CS248463B1 (en) * 1983-12-30 1987-02-12 Jan Gecs Self-locking flat gripping strip

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4665588A (en) * 1983-07-20 1987-05-19 Kitagawa Industries Co., Ltd. Degaussing coil holder
GB2220979A (en) * 1988-07-18 1990-01-24 R A Smith Plastics Ltd Security band-clamp or -tie
GB2220979B (en) * 1988-07-18 1992-09-09 R A Smith Plastics Ltd Security ties
US5197164A (en) * 1992-06-01 1993-03-30 Illinois Tool Works Inc. Quick release strap connector
US5890265A (en) * 1995-12-13 1999-04-06 Tyton Hellermann Corporation Parallel entry tie

Also Published As

Publication number Publication date
IT8221644V0 (en) 1982-04-21
DE8210368U1 (en) 1982-08-12
FR2504611A3 (en) 1982-10-29
FR2504611B3 (en) 1983-04-29

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)