FR2717506A1 - Needle insertion appts. for yarn twisting saving time and needles - Google Patents

Abstract

A needle insertion appts. for threading a two-four-one device for twisting yarn is constructed from the following: a housing (1) with entry (2) and exit (3) and containing an actuator with three pairs of rollers (10, 10', 20, 20', 30, 30') each with interlocking gear wheels (12, 12', 22, 22', 32, 32'); a motor (M) in the handgrip housing with its own gear wheel (9) engaging with one (22) of the wheels of the above gear train so that when activated it rotates the first (10, 10') and third roller pairs to advance the needle and the second to retract it; and cut-outs (13, 13', 23, 23', 33, 33') on the roller surfaces where the second set (23, 23') w.r.t. sets one and three (33, 33') are angularly displaced by 90 deg. and longer so to effect the desired movement.

Description

The present invention relates to a device for inserting a needle

  for wire hooking which is capable of doing wire hooking work to twist wires faster and easier

  in a two-four-one wire twist.

PRIOR ART

  Twisting work of threads using a two-four-one thread twisting device must be carried out in such a way that a spindle on which is wound a thread passing over an outer surface of an upper guide is introduced and the guide upper, at the same time as the spindle, is introduced on a spindle provided on a twisting device and then a thread of the spool must then be brought to wind around a cylinder after having crossed the interior of the upper guide, and a work intended to pass a spindle thread first through the interior of the upper guide and to be wound around a cylinder is called a thread hanging work, and so that the spindle thread passes through d first inside the upper guide, it must

be guided by a needle.

  The needle is moreover longer than the length of the upper guide and the body of the needle made of plastic material must have an appropriate flexibility to pass through an orifice by bringing out a certain

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  number of tension balls that have been blocked in the hole. The upper guide is constructed so that its internal space is divided into several layers of tension ball receptacle, an opening for the passage of the wire is perforated in the tension ball receptacle of each layer, and a number of balls tension block these orifices so as to stretch a wire which

crosses these orifices.

  For a needle inserted into the upper guide to pass through the orifice by expelling outward the tension balls which blocked the orifice, it is not enough for the needle to follow a rectilinear movement, but it should advance according to a repetitive motion

suitable forwards and backwards.

  Although the needle can quickly pass through the upper guide without failure only when the above forward / backward movements are performed very correctly and quickly, until now there have been no needles manufactured for such operations, and an operator had to perform the movement of the needle back and forth manually so that the needle would pass through the interior of an upper guide, thus posing a lot of problems since it took some time for the needle passes through the upper needle and as the movement of the needle forwards and backwards was not correct, there was a significant deterioration of the needle due to a

wrong insertion.

  The situation is further aggravated, since a spindle, on which a wire is wound, is introduced on the outer surface of the upper guide, and therefore an operator cannot see the entire interior of the upper guide, he performs insertion only by roughly measuring by hand without knowing

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  the condition of the needle or tension balls completely, so that it has often happened that the needle is bent considerably and that the insertion does not

don't.

SUMMARY OF THE INVENTION

  The object of the present invention is to solve the above problems and it is intended for a needle to carry out a correct and rapid movement forward / backward, inside the upper guide thanks to a few rotating rubber rollers, to pass the needle faster and easier through the upper guide, creating less

deterioration of the needle.

  More specifically, the needle insertion device of the invention comprises an insertion housing which is pierced with a needle inlet and outlet and which is fixed to a handle, and a motor placed in the insertion housing as well as three pairs of rubber rollers driven in rotation by said

engine.

  In this device, each pair of rubber rollers, among the three pairs of rubber rollers (which will be designated hereinafter by first, second and third rollers) rotates in opposite directions, but the first and third rollers are provided to advance the needle in the direction of the exit when it is in place, so that the needle inserted between them is moved towards the exit and progresses forward, while the second rollers are provided to move the needle towards the entrance when it has been introduced, so that the needle inserted between them, is moved towards the entrance and

advances backward.

  Since respective recesses of different lengths and different directions are

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  formed on the outer surface of the rollers above, even if the first rollers and the third rollers are intended to be rotated so as to move the needle forward and simultaneously, the second rollers are provided to rotate so as to move the needle back, the needle inserted between the rollers, repeats correctly a movement forward / in

  back a predetermined distance.

  That is to say that each recessed recess is formed over a predetermined length at the outer surface of these rollers, and that the recesses are oriented towards the needle according to the rotation of the rollers, the recesses of two rollers oriented at one towards the other constituting a space of predetermined size, so that the needle inserted between them cannot be pushed and that, consequently, a state is formed in which the needle cannot be moved nor forward , nor backwards, over a distance as long as the recesses. The recesses formed on the second rollers are such that their lengths are greater than those of the recesses of the first and third rollers, and their positions are offset by 90 degrees relative to those

other pebbles.

  Consequently, since the recesses of the second rollers come in front of the needle at a time when the first and third rollers push and move the needle forward, the rotation of the second rollers does not

  not disturb the movement of the needle forward.

  Similarly, since the recesses of the first and third rollers arrive in front of the needle at a time when the second rollers move the needle back, they do not modify the movement of the needle backwards , under the effect of the latter

pebbles.

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  And, as already explained above, since the recesses formed on the second rollers are longer than the recesses formed on the first and third rollers, there is a repetitive operation in which the movement in front of the the needle under the effect of the first and third rollers is more important than the backward movement due to the second rollers, so that the needle manages to

  cross the upper guide and be removed from it.

  In other words, since the recesses formed on the second rollers are longer than the recesses formed on the first and third rollers, the length of the request and the movement of the needle back becomes relatively shorter than the length of its displacement under the effect of the first and third rollers, so that the needle manages to expel the

  tension balls and through the hole.

  However, according to the present invention, since the length of the displacement of the needle back and forth is determined according to the length of the recesses formed on the outer faces of each of the rollers, it becomes possible for the needle to pass through the upper guide by repetitive movement back and forth over appropriate distances in response to the amplitude and the weight of the tension balls placed inside the upper guide, this repetitive movement being entirely correct with respect to to the one which was carried out by hand by an operator, the insertion and the passage of the needle being carried out instantaneously, which saves much time and manpower in

the work of hanging the wires.

  Although there may be a situation where the incorrect movement of the operator back and forth by hand causes unreasonable movement of the needle and results in a lot of

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  damage and that, in certain cases, the needle does not pass and is damaged, according to the present invention, since the correct and rapid movement forward and backward is repeated mechanically, the damage to the needle, under the effect of incorrect movement are reduced, and situations, in which it becomes impossible for the needle to pass, are practically

reduced to nothing.

BRIEF DESCRIPTION OF THE DRAWINGS

  Figure 1 is a longitudinal cross-sectional view of the present invention; Figure 2 is a longitudinal cross-sectional view of an operating means according to the present invention; Figure 3 is a side cross-sectional view of an operating means according to the present invention; Figure 4 is a partial perspective view of the operating means according to the present invention; Figure 5 is a perspective view of the operating means according to the present invention; Figure 6 is a schematic sketch illustrating a situation in which a needle moves forward according to the present invention; Figure 7 is a schematic sketch illustrating a situation in which a needle moves backward according to the present invention; FIG. 8 is a diagram illustrating a situation of use of the present invention; FIG. 9 is a diagram illustrating a situation in which the needle is completely introduced through an upper guide, according to the present invention; and Figure 10 is a perspective view of the

present invention.

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  DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT

  A preferred embodiment of the present invention will be described below with more detail.

  details with reference to the accompanying drawings.

  FIG. 1 represents a longitudinal cross-sectional view of a device A for inserting a needle according to the present invention, and the insertion device A comprises a housing 1 forming the outside of the insertion device A which has an inlet 2, an outlet 3 and a handle 4, and an operating means 5 equipped with a motor M installed in the handle 4 of the housing 1, as well as three pairs of rubber rollers driven in rotation by the motor M, know the first roller 10, the

  second roller 20 and the third roller 30.

  Relative to the operating means, as shown in Figures 2, 3, 4 and 5, the first rollers, 10 ', the second rollers 20, 20' and the third rollers 30, 30 ', are mounted in rotation around d 'rotary shafts 11, 11', 21, 21 ', 31 and 31', with distances

respective predetermined.

  On one side of the rotary shafts 11, 11 ', 21, 21', 31, and 31 'of the first, second and third rollers 10, 10',, 20 ', 30 and 30', of the gears 12, 12 ', 22 , 22 ', 32 and 32' are all inserted and meshed together respectively, and a pinion 22 inserted on one side of the rotary shaft 21 of the second roller 20 is wider than the other pinions, and therefore it is also meshed with a pinion 9 of the motor M which projects

  inside the operating means 5.

  Consequently, when the motor is rotated, as indicated by an arrow in FIGS. 6 and 7, the first and third rollers 10, 10 ', 30 and 30' are driven in rotation to urge the needle inserted between them. moving it towards exit 3, while the second rollers 20 and 20 'begin to be

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  rotated to move the needle in

direction of entrance 2.

  On both sides of the outer surfaces of the first and third rollers 10, 10 ', 30 and 30', as shown in Figures 6 and 7, longer recesses 13, 13 ', 33 and 33' are formed, while recesses 23 and 23 'of shorter length are formed on both sides of the outer surfaces of the second rollers 20 and 20', and the recesses 13, 13 ', 33 and 33' of the first and third rollers 10, 10 ', 30 and 30' as well as the recesses 23 and 23 'of the second rollers 20 and 20' are formed in directions which differ from each other by an angle of approximately degrees and, therefore, they are constructed so that at the moment when the rollers are rotated, as shown in Figures 6 and 7, the recesses 23 and 23 'of the second rollers 20 and 20' are facing the first and third rollers 10, 10 ', 30 and 30' on both sides during the period o the recesses 13, 13 ', 33 and 33' of the first and third rollers 10, 10 ', 30 and 30' are o oriented towards the needle placed in the center, while the recesses 13, 13 ', 33 and 33' of the first and third rollers 10, 10 ', 33 and 33' are oriented in the two lateral directions during the period when the recesses 23 and 23 'of the second rollers 20 and 20' are

  oriented towards the needle.

  In the volume formed between the first, second and third rollers 10, 10 ', 20, 20', 30 and 30 ', as shown in Figures 3, 4, 5, 6 and 7, are respectively placed holding bars 40 and 50 breakthroughs of holding orifices 41 and 51, so as to be situated on the central axis of the needle which passes through this volume so that the needle passes through them, and only when the needle crosses the upper guide T, it is held by the holding bars 41 and 51 and

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  that it is therefore not bent inside

of the operating means 5.

  A connecting tube 60 formed with a guide orifice 61 inside is introduced at one end of the outlet 3 of the needle insertion device A, and when this connecting tube 60 is introduced on a thread path projecting from the upper guide T, as shown in FIG. 8, the outlet 3, the guide hole 61 and the path of the wire are brought into alignment so that an insertion of the needle 6 into the path of the wire 8 may

  be done easier and faster.

  The connecting tube 60 can be manufactured so as to be modified so as to be adjusted as a function of the amplitude

of path 8 of the wire.

  In the drawings, the reference numeral 70 which is not explained, represents a ventilation opening, the reference numeral 71 designates an opening and closing cover, the reference numeral 72 is a hook, the reference numeral 73 an electrical wire, the numerical mark 74 an engine control switch, numerical mark 75 a hooking means formed at a rear part of the needle, numerical mark 76 designates a tension ball, numerical reference 77 designates a spindle, numerical reference 78 denotes a wire, the numerical reference 79 designates a pin, and the digital reference 80 designates a path

lower of the wire.

  The execution of the work of hooking a thread using the needle insertion device A constructed according to the present invention will be described more

in detail later.

  When the handle 4 of the insertion device A is grasped and the connecting tube 60 is inserted into the wire path 8 of the upper guide T as in FIG. 8, the outlet 3, the guide hole 61 and the path 8 of the wire are all aligned with each other and in this situation

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  when the switch 74 is pressed, the motor M starts, the first and third rollers 10, 10 ', and 30' are rotated to advance the needle 6 forward and the second rollers 20 and 20 'are rotated to advance

the needle back.

  Consequently, the needle 6 performs a regular repetitive movement forward, under the effect of the first and third rollers 10, 10 ', 30 and 30' and a movement backwards under the effect of the second rollers 20 and 20 ', and when the length of the recess is short, the length of the outer surface of a roller in contact with the needle becomes all the greater, while if the recess is long, the length of the outer surface of the roller in contact with the needle becomes even shorter; consequently, the movement in front of the needle 6 under the effect of the first and third rollers 10, 10 ', 30 and 30' whose recesses 13, 13 ', 33 and 33' are short is longer than the movement backward due to the second rollers 20 and 20 'whose recesses 23 and 23' are longer, so that the needle repeats a longer forward movement of the difference between the lengths of the recesses and a

shorter backward movement.

  By rapidly repeating this movement back and forth, the needle 6 forces the tension balls 76 to mount on the side and successively crosses the cup orifices 76 'for tension balls and passes inside the upper guide T quickly then crosses the lower wire path 80 of the pin 79 and exits outside. When a head part of the needle 6 is extended outside the lower thread path 80, the motor stops immediately and the insertion device A is

clear of wire path 8.

  il 2717506 At this moment, the needle 6 goes into a state where the part of its head protrudes outside the path of the

  lower wire 80, as shown in Figure 9.

  Under these conditions, when one end of the wire 78 of the spindle 77 is wound two or three turns around the hooking means 75 formed on the rear part, so that the wire is hooked to a hooking element projecting from the hooking part 75, the head part of the needle 6 is then grasped by hand and pulled down, the whole needle 6 then quickly passes through the upper guide T and leaves towards the outside of the lower path

of wire 80.

  At this time, the thread 78 of the spindle 77 being wound on the hooking part 75 is also pulled outside and then, the thread 78 out of the lower path of the thread 80 is detached from the needle 6 and brought to s '' wind on the cylinder formed on the upper side so that the work

is finished.

  As described above, according to the thread insertion device A of the present invention, since the forward movement and the backward movement of the needle 6 are carried out quickly and correctly thanks to the motor running at high speed, and on the first, second and third rollers 10, 10 ′, 20, 20 ′, 30 and 30 ′, the passage of the needle 6 inside the upper guide T is rapid, which saves labor. and the time required to move the needle back and forth, as an operator has done to date, and since an incorrect pass cannot be made, the damage to the needles are reduced and, therefore, a work is obtained which can be repeated for long periods, and incorrect passages are almost null, since in this case,

  the insertion itself becomes impossible.

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  In addition, in a work of inserting the part of the needle head 6 on the thread path which projects above the upper guide T as in the present invention, when the connecting tube 60 of the device Insertion A is placed on the thread path, since the needle 6 is guided by the connecting tube 60 and easily placed on it, the insertion work is even faster and performed relatively easily compared to a direct insertion in a narrow path 8 of wire which is carried out by hand, in a conventional manner, without using the operation of guiding the connecting tube 60.

Claims (1)

CLAIMS Device for inserting a needle for hooking a thread into a twisting device with two-four-threads which is carried out so that: an operating means (5) is formed by installing the first, second and third rollers (10, ', 20, 20', 30 and 30 ') grouped in three pairs inside a housing (1) having an inlet (2) and an outlet (3); sprockets (12, 12 ', 22, 22', 32 and 32 ') are formed on one side of the first, second and third rollers (10, 10', 20, 20 ', 30 and 30') in order to s '' mesh between them; a motor (M) is installed inside a handle of the housing, and a pinion (9) of the motor (M) projects inside the operating means (5) so as to mesh with a pinion (22) of the second roller (20), so that when the motor (M) is rotated, the first and third rollers (10, 10 ', and 30') are rotated in a direction which moves the needle (6) forward while the second rollers (20 and 20 ') are rotated in opposite directions to move the needle (6) back; and recesses of predetermined length (13, 13 ', 33 and 33') are formed on both sides of the outer surface of the first and third rollers (10, 10 ', 30 and 30') while recesses of predetermined length ( 23 and 23 ') are also formed on both sides of the outer surface of the second rollers (20 and'), but the recesses (23 and 23 ') of the second rollers (20 and 20') are longer than the recesses ( 13, 13 ', 33 and 33') of the first and third rollers (10, 10 ', 30 and 30'), and that the directions of these recesses are such that they orient the recesses 14 2717506   towards directions making angles between them about 90 degrees.