Device in a cable tie
The invention relates to a device in a cable tie. This comprises an elongate band part (2) of a certain width and thickness, which at one end has an elongate insertion part (2a) of a lesser width than the band part (2) and at its other end a locking head (3) with, on the one hand, a through-opening (4) for the band part (2), which has largely the same width as the band part (2) but a height greater than the thickness of the band part (2), and on the other a slit (5) in one transverse wall of the opening, the width of which slit is such that it will allow the insertion part (2a) to be inserted into the opening (4) via the slit (5), forming a band loop. A tongue (6), which is designed to lock the band part (2) in relation to the locking head (3), extends from one end of the opening (4) to the other and towards the slit (5). A sheet-metal insert (7) reinforcing the locking head (3) is embedded in the locking head (3).
The present invention relates to a device according to the pre-characterising clause of claim 1.
Such a cable tie has been previously disclosed, for example, by SE 9903378-9.
An advantage with cable ties of this type is that a tie loop can be quickly and readily produced by introducing the narrowing section of the band part into the through-opening via the slit in the locking head. A disadvantage with such a locking head provided with a slit, often termed an open locking head, is that the force at which the head is no longer capable of holding the band part is determined by the wall thickness of the locking head and the prevailing temperature; since cable ties of this type are made from a plastic material, limits must inevitably be placed on the temperatures below which the cable ties can be used without the risk of the cable tie losing its ability to hold together.
In order to increase the force that is required in order to break open a cable tie SE 9903378-9 C2 discloses how peg-shaped projections, pointing in towards the through-opening in the locking head, can be made to engage with corresponding grooves running along each edge of the band part.
The object of the present invention is to provide a cable tie that improves upon the cable tie of the aforementioned type. This is achieved by the distinguishing features specified in the characterising part of claim 1.
The invention will be described in more detail below with reference to the drawing attached in which embodiments of a cable tie according to the invention are shown in schematic form. More specifically,
The cable tie in
According to the invention a sheet-metal insert 7, preferably of stainless steel sheet, is embedded in the locking head 3, the function of the insert being to make the locking head 3 less susceptible to forces inclined to expand the slit 5 with the result that the band part 2 risks disengagement from the tongue 6. In the embodiment shown in
The embodiment according to
Referring to
The insert 7, as will be seen from
In the embodiment of a cable tie according to the invention shown in
It will be appreciated that the embodiment with the flanges 3b, 7a shown in
In an alternative embodiment the flanges 3b are omitted, so that the engagement in the grooves 2b is maintained solely by the flanges 7a integrally formed with the insert 7.
In another alternative embodiment the flanges 7a are omitted so that the engagement in the grooves 2b is maintained solely by the flanges 3b.
Claims
1. Device in a cable tie comprising an elongate band part of a certain width and thickness, which at one end has an elongate insertion part of a lesser width than the band part and at its other end a locking head with, on the one hand, a through-opening for the band part which has substantially the same width as the band part but a height greater than the thickness of the band part, and, on the other hand, a slit in one transverse wall of the opening, the width of which slit is such that it will allow the insertion part to be inserted into the opening via the slit, forming a band loop, a tongue, which is designed to lock the band part in relation to the locking head extending from one end of the opening to the other and towards the slit, wherein a sheet-metal insert reinforcing the locking head is embedded in the locking head.
2. Device according to claim 1, wherein the insert is congruent with the opening in the locking head.
3. Device according to claim 1, wherein the tongue is integrally formed with the insert.
4. Device according to claim 1, wherein the locking head, in a manner known in the art, has flanges extending along edges of the slit and in towards the through-opening, the flanges being designed to interact with corresponding grooves in the band part.
5. Device according to claim 4, wherein the insert is formed with corresponding metal flanges reinforcing the flanges of the locking head and interacting with grooves in the band part.
6. Device according to claim 1, wherein the insert has flanges extending along edges of the slit and in towards the through-opening, the flanges being designed to interact with corresponding grooves in the band parts.
7. Device according to claim 2, wherein the tongue is integrally formed with the insert.
8. Device according to claim 2, wherein the locking head, in a manner known in the art, has flanges extending along edges of the slit and in towards the through-opening, the flanges being designed to interact with corresponding grooves in the band part.
9. Device according to claim 2, wherein the insert has flanges extending along edges of the slit and in towards the through-opening, the flanges being designed to interact with corresponding grooves in the band part.
Type: Application
Filed: Feb 2, 2004
Publication Date: Nov 2, 2006
Inventor: Sven Pettersson (Oberageri)
Application Number: 10/543,692
International Classification: B65D 63/00 (20060101);