Device for knotting a flexible tie

Details Device for knotting a flexible tie Device for knotting a flexible tie

1988-10-25

1990-04-03

Falik, Andrew M.

Knots and knot tying

Knotters

Sleeve and spindle

289 2, D04G 500, B65B 1326

Patent

active

049134744

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The invention relates to a device for knotting a flexible tie, such as a strap, string, cord, or tape, etc.


BACKGROUND OF THE INVENTION

There are numerous industrial applications in which a flexible tie needs to be knotted to itself, to another tie, or around some object or support. In general, the knots are tied by hand, which is not always easy in an industrial environment or when the tie or the object which it surrounds is large in size.
There thus exists a need for a device for knotting a flexible tie, which should be simple, effective, compact, and cheap, and which should make it possible to knot a tie automatically in a manner which is rapid and reproducible.


SUMMARY OF THE INVENTION

To this end, the invention proposes a device for knotting a flexible tie, characterized in that it comprises tie support means, a tie displacement member mounted to rotate around the tie in a plane which is oblique relative thereto, drive means for rotating said member through about one turn in order to form a turn or loop in the tie, and tie drawing means for drawing the tie through said turn or loop.
This device thus makes it possible to tie an overhand knot in a tie by means which are simple in structure and easy to operate.
According to another characteristic of the invention, the tie drawing means comprise a clamp or a hook mounted at one end of a rod which is movable in translation along its axis and which forms a support for the tie and is oriented perpendicularly to the tie.
Preferably, the hook mounted at the end of the rod is movable and is connected to drive means for displacing it between a closed position and an open position for grasping and releasing the tie.
In a preferred embodiment of the invention, the tie displacement member comprises a C-shaped rotary support having a finger mounted thereon extending perpendicularly to the plane of said support.
When the C-shaped rotary member is engaged around the tie, and is rotated, the finger carried thereby bears against the tie to form a loop or turn in the tie.
Thereafter, a knot can be tied merely by pulling the tie through the turn or loop formed in this way.
The stroke of the rod carrying the tie-grasping clamp or hook may be limited so as to draw a loop of the tie through the above-mentioned turn or loop of the tie.
Then, the knot can be untied merely by pulling on the end of the tie.
The device of the invention has a very wide and varied range of applications in numerous types of industry. It may be used, in particular, for knotting ties around bundles of objects to be transported.


BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be better understood, and other details, characteristics, and advantages thereof will appear more clearly on reading the following description which is given by way of example and with reference to the accompanying drawings, in which:
FIG. 1 is a diagrammatic side view of a knotting device in accordance with the invention and including automatic tie support clamps;
FIGS. 2 and 3 are a diagrammatic front view and side view of the rotary member constituting a portion of said device, together with its rotary drive means;
FIG. 4 is a diagrammatic longitudinal section through the rod and tie-grasping means forming a part of said device; and
FIGS. 5a to 5e are diagrams showing the operation of said device and the tying of a knot.


DETAILED DESCRIPTION OF THE PREFERRED EXEMPLARY EMBODIMENTS

Reference is made initially to FIGS. 1 to 4 which show the structure of an embodiment of a knotting device in accordance with the invention.
As shown in FIG. 1, this device comprises a fixed frame 10 including a rod 12 for guiding a slide 14 which is fixed to the frame 16 for a C-shaped rotary member 18 whose plane extends obliquely relative to the guide rod 12 of the slide 14.
The slide also carries two bushings 20 for guiding a rod 22 in translation, with the rod extending through the rotary member 18 and being displaced in translation along its axis parallel to the guide rod 12 by one or more coupled actuator

REFERENCES:
patent: 2661230 (1953-12-01), West
patent: 4774870 (1988-10-01), Yamamoto et al.

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