Elliptical acupuncture device with sealed housing and inclined transverse needle guide box

Abstract

A needle punching device for achieving reinforcement by needle punching, especially non-woven fiber yarn or fiber sheet, comprises: needle boards respectively having needle fields; columns having vertical longitudinal axes and connected to corresponding needle boards; a driving device configured to apply reciprocating motion to the needle boards and / or needles, so that the needles have an elliptical path that passes through in one direction, and then pass through the fiber yarn or fiber sheet in the machine direction or MD forward direction to reinforce; a shell that accommodates the columns or a part of the columns and the driving device; and a needle guide box arranged in the corresponding opening of the sealed shell, and is installed to be inclined relative to the corresponding inclined axis, and is fixed relative to the shell and perpendicular to the longitudinal axis and MD direction, the columns slide in the shell and pass through the shell with the help of the needle guide box, and the driving device includes a first longitudinal driving device, which is configured to apply reciprocating motion to the columns in a direction basically parallel to the longitudinal axis, especially only vertical reciprocating motion.

Description

Technical Field

[0001] The invention relates to a needling device for achieving consolidation by needling a fiber yarn or fiber sheet, in particular a nonwoven. The needling device comprises at least one needle board which traverses the fiber yarn or fiber sheet in the machine direction or MD direction of advance. The drive means are configured to impart a reciprocating motion to the uprights so that the needles have an elliptical path traversed in one direction and then traverse the fiber yarn or fiber sheet in the machine direction or MD direction of advance. Background Art

[0002] A needling device of this type is known, for example, from the applicant's EP-A1-1 736 586, in which a needle board is integral with a rod or column extending along a longitudinal axis and passes through the housing wall via a guide box in which the needle board slides, moving both in the vertical direction and in the MD direction, thereby causing the needles to move elliptically, the guide box being arranged to be pivotable relative to an axis extending in the CD direction (that is, perpendicular to the vertical direction and perpendicular to the MD direction).

[0003] An advantage of this prior art needling device is that it can be largely contained within a sealed housing (ie the main part of the column and the column drive) thereby allowing lubrication of the various parts and mechanical joints, thereby ensuring longer service life and reliability of installation.

[0004] However, this acupuncture device has the disadvantage of being complex in structure, that is, the device is particularly complex and requires a phase shift between two eccentric shafts to drive the column to have an elliptical path movement.

[0005] We hope to provide a needling device which has the following advantages: it can be contained in a sealed housing, thereby ensuring good lubrication of the various driving components of the column, and at the same time has a more compact structure and less complexity.

[0006] A needling device is also known from FR-A1-2800396, which comprises a needle board; a column fixed to the needle board; a drive device configured to reciprocate the column; a housing accommodating a part of the column and a part of the drive device; and a sleeve arranged in an opening of the housing, through which the column passes through the housing. In this complex device, the housing is not sealed and part of the drive device, namely those intended to perform transverse movement in the MD direction, is outside the housing. Summary of the invention

[0007] According to the invention, we obtain a system that is less complex than the systems of the prior art, especially from a mechanical point of view, and is also more compact. In particular, it is no longer necessary to make a phase shift between the two eccentric shafts. At the same time, the possibility of integrating all the drive means in a sealed housing is maintained, or even increased, thereby lubricating the various mechanical parts, thus ensuring a long life and reliability of the device.

[0008] According to an advantageous preferred embodiment, the transverse drive device includes a control device, which itself constitutes an invention independent of the above-mentioned invention, but can be combined with the latter, including: a drive rod, which is suitable for being connected to the needle and / or needle plate and / or an element integral with the needle plate or to the needle and / or tilt box so that the needle reciprocates in a direction basically parallel to the MD direction; an eccentric shaft and a connecting rod, which eccentric shaft drives the connecting rod to rotate along the rotation axis, especially extending in the CD direction perpendicular to the MD direction and the vertical direction, the connecting rod is connected to the drive rod through an intermediate rod element, the intermediate rod element is integral, or consists of multiple parts that are not hinged to each other, and pivots around a pivot, especially a rotation axis parallel to the eccentric shaft, the rod is directly hinged to the connecting rod on the one hand, especially along an axis parallel to the pivot and at a certain distance therefrom, and on the other hand, it is directly hinged to the drive rod, especially at a point at a certain distance from the pivot, so that it reciprocates in the direction MD.

[0009] Preferably, the control means comprises means for adjusting the reciprocating stroke of the drive rod.

[0010] In particular, the adjustment device adjusts the distance between the pivot axis of the lever and the drive lever and / or the distance between the pivot axis of the lever and the connecting rod.

[0011] According to a preferred embodiment, the adjustment device comprises a slide, which is fixed to the drive rod or to the pivot axis of the rod, or to the hinge axis of the connecting rod and the rod, and the slide and the rod are arranged to allow the slide to slide relative to the rod between multiple positions, and the slide is fixed to the rod in each of the multiple positions.

[0012] According to a very advantageous embodiment, the adjustment device comprises a guide slot between which the slide can slide between two extreme positions, in particular a high position in which the drive rod is at the height of the pivot axis and a low position in which the drive rod is at the level of the pivot axis. The drive rod is as far away from the pivot axis as possible, so that, depending on the position of the slide in the slot in which it is fixed to the rod, the amplitude of the reciprocating movement of the rod can be adjusted, in particular between zero amplitude (fixed rod) and maximum amplitude.

[0013] According to a preferred embodiment, the device for fixing the position of the slide in the slot comprises an adjustment rod connected to the adjustment rod, the adjustment link is hinged on the auxiliary adjustment eccentric shaft, and the rotation of the auxiliary adjustment shaft allows the adjustment and fixing of the position of the slide in the slot.

[0014] According to another advantageous embodiment, the means for fixing the position of the slide in the slot comprise an adjustment lever integral with the helical cam, via an auxiliary adjustment shaft in which a helical groove is formed, along which the adjustment lever is movable.

[0015] According to yet another advantageous variant, the means for fixing the position of the slide in the slot comprise an adjustment rod connected to an adjustment rod driven by a jack, allowing a linear movement of an adjustment link mounted so as to be pivotable relative to the axis of the adjustment rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By way of example, preferred embodiments of the present invention will now be described with reference to the accompanying drawings:

[0017] Figure 1 is a partially cutaway overall front view of the acupuncture device according to the first embodiment of the present invention;

[0018] Figure 1A yes Figure 1 an enlarged view of a portion of;

[0019] Figure 2 is a partial front cross-sectional view of an acupuncture device according to another embodiment of the present invention;

[0020] Figure 2A is a partial front view and partial cross-sectional view of an acupuncture device according to another embodiment of the present invention;

[0021] Figure 3 is an overall perspective view of the control system of the main connecting rod forming the transverse drive device;

[0022] Figure 3A is a perspective view of another embodiment of a control system according to the present invention;

[0023] Figure 3B is a perspective view of yet another embodiment of a control system according to the present invention;

[0024] Figure 4A yes Figure 3 An overall picture of the changes in the system;

[0025] Figure 4B yes Figure 4A The rear view of the changes;

[0026] Figure 5 yes Figure 3 , 4A And another overall picture of the changes in the 4B system. DETAILED DESCRIPTION

[0027] exist Figure 1 , a first embodiment of the acupuncture device according to the present invention is shown. The housing is shown in a cross-sectional view, and the rest of the acupuncture device is shown in a front view, with a portion of the needle guide box cut away.

[0028] The needling device comprises a needle board 10 comprising needles 1 extending from the bottom side of the needle board, the needles 1 being arranged in rows and columns or in a random or pseudo-random manner, as is well known in the art. The needle board 10 is carried by a crossbeam 2, called a movable beam. The crossbeam 2 and the board 10 are integral with each other, but are removable so that the board can be easily replaced with a new one when the needles are worn and / or broken. The needles are intended to have a reciprocating movement perpendicular or substantially perpendicular to the plane of the fiber yarn or fiber sheet, passing in one direction from top to bottom and from bottom to top, the needles are intended to have a reciprocating movement whose trajectory is perpendicular or substantially perpendicular to the plane of the fiber web, in particular from top to bottom and from bottom to top, so as to pass in one direction and then in the other direction the fiber yarn or fiber sheet passes in front of the needle board in the forward direction or MD direction, that is, from left to right in the horizontal direction in the figure.

[0029] The uprights 3 extending along a longitudinal axis 11 perpendicular to the plane of the plate are fixed to the movable beam 2 so that the movements of the uprights 3, movable beam 2, needle plate 10 and needles are identical, ie have the same elliptical path.

[0030] A drive device is provided to transmit a force component having a direction parallel to the longitudinal axis 11 and a force component in the MD direction to the column 3 (and therefore also the needle board 10, the moving crossbeam 2 and the needle 1), so as to have Figure 1 The elliptical path of the elliptical needle is shown.

[0031] The sealed housing 7 surrounds the drive device and a portion of the column 3, a portion of the column 3 passes through the wall of the housing 7 through the needle threading guide box 4, and the interface between the needle threading guide box 4 and the housing 7 is sealed by a seal, and the column can take the form of a bellows seal 50 according to a possible embodiment. The needle threading guide box 4 is installed to be inclined relative to the axis 5 fixed to the housing 7, and the axis 5 is parallel to the CD direction (perpendicular to the MD direction and the longitudinal axis 11). The column 3 can slide in the needle threading guide box 4. The guide ring 16 is arranged on the inner wall of the needle threading guide box 4 to ensure sliding and lubrication between the column 3 and the needle threading guide box 4. The seal between the column 3 and the needle threading guide box 4 is provided by a seal attached to the bottom of the needle threading guide box, not shown.

[0032] It is very advantageous, in particular with regard to the life of the housing seal, for the axis 5 to be positioned substantially at the level of the opening of the housing through which the threading guide box 4 passes, in particular in the opening.

[0033] The drive means comprise first longitudinal drive means configured to impart a reciprocating motion to the column in a direction parallel to the longitudinal axis. These first drive means comprise two systems 6 with eccentric shafts 12 and connecting rods 13 and intermediate connecting rods 9.

[0034] The shaft 12 rotates in the opposite direction (eg Figure 1 The two connecting rods 13 are driven by the two arrows at the top. The feet 14 of the two connecting rods 13 are respectively hinged at one end of the middle connecting rod 9 extending in the MD direction. The middle connecting rod 9 also includes a tab 15 extending downward in the center. The end of the tab 15 is hinged to the upper end of the column 3.

[0035] These first longitudinal drive means make it possible to move the upright 3 back and forth only along the longitudinal axis.

[0036] A second transverse drive is also provided in the form of a main connecting rod 8 arranged in the MD direction. One end of the rod 8 is hinged to the threading guide box 4 at a point 17 in the housing 17, which is at a certain distance from the rotation axis 5 of the pot, in particular substantially at the upper end of the threading guide box. It is thus imposed with the threading guide box 4 reciprocating oscillating movement, causing the column 3 to pass through the column 3 (as shown by the double arrow above) by a reciprocating movement in the direction MD or substantially in the direction MD. Figure 1 The other end of the link 8 is connected to a control system called a forward system, which may be particularly similar to the following Figures 3 to 5 Those shown.

[0037] On the other hand, the system counterweight 19 is connected to the needle threading guide box 4, which is attached to the needle threading guide box 4 on the side opposite to the side where the advancement system is located.

[0038] Finally, the propulsion system is housed in a sealed casing and it can be operated by an independent electric motor or through one of the control shafts 6 of the first vertical drive means, or through a connecting rod directly mounted on an eccentric integral with one of the control shafts 6 of the first drive means.

[0039] exist Figure 2 , another embodiment of the acupuncture device according to the present invention is shown. The housing is shown in a cross-sectional view, and the rest of the acupuncture device is shown in a front view, wherein a portion of the needle guide box is cut away.

[0040] The needling device comprises two needle boards 10 comprising needles 1 protruding from the bottom side of the needle boards, arranged in rows and columns or in a random or pseudo-random manner, as is well known in the art. Each needle board 10' is carried by a respective crossbeam 2', called a movable crossbeam. The needles are intended to reciprocate along an elliptical path and cross up and down in one direction and then, in the other direction, to pass a piece of cotton yarn or a face of fiber cloth through the fiber cloth or cotton yarn in the advancing direction or MD direction, i.e. from left to right in the horizontal direction in the figure.

[0041] The two 3" longitudinal columns, perpendicular to the plane of the circuit board, extend along the longitudinal axis 11". The columns 3' are respectively fixed to the movable beam 2', so that the movements of the columns 3', the movable beam 2', the needle board 10' and the needles are similar, or even identical, i.e. the same elliptical path or elliptical paths of the same shape but different sizes. The two trajectories can also be opposite, that is, the two ellipses are mirror images of each other.

[0042] A driving device is provided to enable each column 3' (and therefore also the needle board 10', the moving crossbeam 2' and a needle head) to have a force component parallel to the longitudinal axis 11' and a force component movement along the MD direction, so as to have a Figure 2 The elliptical trajectory represented by the ellipse of the needle.

[0043] The sealed housing 7' encloses the drive means and a portion of the column 3', the column 3' passing through the wall of the housing 7 through a corresponding needle guide box 4', the interface of the needle guide box 4' and the housing 7' is formed by a sealing device (not shown, but can be produced in the form of a bellows seal, such as Figure 1A ). Each needle threading guide box 4' is mounted to be inclined relative to the axis 5', fixed relative to the housing 7' and parallel to the CD direction (perpendicular to the MD direction and the longitudinal axis 11'). Each column 3' can slide in the corresponding needle threading guide box 4'. The guide ring 16 is arranged on the inner wall of each needle threading guide box 4" to provide sliding and lubrication between the column 3" and the corresponding needle threading guide box 4". The seal between the column 3' and the corresponding needle threading guide box 4' is provided by a seal not shown attached to the bottom of the needle threading guide box.

[0044] The drive means comprise first longitudinal drive means configured to impart a reciprocating motion to each column in a direction parallel to the longitudinal axis. These first drive means consist of two systems with eccentric shafts 12" and connecting rods 13".

[0045] The shaft 12' is rotated in the opposite direction (eg Figure 1 The two connecting rods 13' are driven by the two arrows at the top. The bottom feet 14' of the two connecting rods 13' are respectively hinged to one end of the respective columns 3'.

[0046] These first vertical longitudinal drive means make it possible to impart to each upright 3 ′ a reciprocating movement in a direction substantially parallel to the longitudinal axis.

[0047] A second transverse drive means is also provided in the form of a main link 8' and an auxiliary link 9', which are arranged in the MD direction and are located inside the housing 7'. One end of the rod 8' is hinged to one of the needle guide boxes 4' at a point 17' remote from the rotation axis 5' of the pot, in particular substantially at the upper end of the pot. The other end of the link 8' is coupled to a drive system called an advancement system, which may in particular be similar to the one described below in Figures 3 to 5 Those shown in .

[0048] The two ends of the auxiliary connecting rod 9' are respectively hinged to one of the needle guide boxes 4'. In particular, the connecting rod 9' is also hinged at the end of the connecting rod 8' at the point 17', but this is not necessary, and the system also works if the ends of the connecting rods 8' and 9' are not active. Articulated at the same point, the connecting rod 8' can be hinged by an independent axis fixed to the guide pot.

[0049] Therefore, it is subjected to the reciprocating vibration of the two needle guide boxes 4', which causes the column 3' to pass through the column 3' by reciprocating movement in the direction MD or substantially in the direction MD (as caused by the Figure 2 Double arrow above link 8' in the diagram).

[0050] On the other hand, a system counterweight 19 ′ is connected to the connecting rod 9 , which is connected to the connecting rod 9 on the upper side between the two shafts 12 ′.

[0051] Finally, the advancement system is housed in a sealed housing and can be actuated by a separate motor or by one of the control shafts 12' of the first vertical drive means or by a connecting rod mounted directly on the eccentric.One of the control shafts 12' of the first drive means has a first drive means.

[0052] In particular, Figure 2A As shown, it corresponds to Figure 2 of the embodiment, but can also be applied to Figure 1 In an embodiment, a mechanical connection is provided between the connecting rod 8' main part and the transverse drive. The connecting rod 51 is driven by the eccentric shaft 12' of one of the two connecting rod and eccentric shaft systems 6', for example Figure 2A As shown, it is driven by an eccentric shaft 12', which also drives the hinged needle threading guide box 4' and is also directly connected to the connecting rod 8'. Figure 2A In this variant, an intermediate lever 52 is provided which is mounted rotatably relative to an axis 53 which is fixed relative to the housing 7 ′ and which is directly articulated at its two ends to the connecting rod 51 and to the main connecting rod 8 ′, respectively.

[0053] In the above description, the first longitudinal drive means is different from the second transverse drive means. Although this separation into two different means has advantages, it is conceivable to provide a unique means performing both functions of the first and second means without departing from the scope of the invention as defined in the claims.

[0054] exist Figure 3 , Figure 3A , Figure 3B , Figure 4A , Figure 4B and Figure 5 In the embodiment of the system, the system can be used to control Figure 1 and Figure 2 However, the control system itself is not necessary, and other systems known in the prior art for controlling the reciprocating motion of the links 8 and 8' in the MD direction may be used, such as EP-A1-1736586, EP-B1-3372716, FR2738846, US6161269, etc.

[0055] exist Figure 3 In the embodiment of the present invention, the system comprises an eccentric shaft 21 connected to a connecting rod 22, which is directly articulated to a vertical integral rod 23, which is pivoted relative to a fixed pivot axis 24, located vertically below the axis of articulation of the connecting rod 22 to the rod 23. A drive rod 27 is directly coupled to the rod 23. The drive rod 27 is integral with a slide 25 and one end of a rod 26, the axis of which extends parallel to the axis 24.

[0056] The rod 26 and thus also the position of the drive rod 27 relative to the rod's pivot 24 in the vertical direction and / or relative to the axis of articulation of the connecting rod 22 with the rod can be adjusted by means of an adjustment system consisting of an auxiliary adjustment eccentric shaft 29 and an adjustment lever 28. The adjustment lever 28 is hingedly connected at its upper end to the eccentric shaft (or crankshaft) 29, while its lower end is pivotally mounted relative to the axis of the rod 26.

[0057] The rod has an opening in the form of a slot 30 in which the slider 25 slides in translation integrally with the rod 26 .

[0058] Depending on the position of the connecting rod 28 determined by the appropriate rotation of the crankshaft 29, the relative position of the slide 25 in the slot 30 can be selected and adjusted so as to adjust the distance along the vertical axis of the rod. This distance between the axis 24 and the axis of the rod 26 (and therefore also the distance between the axis of the rod 26 and the axis of the connecting rod 22) can vary between a zero value (a position in which the slide 25 is located at the top of the slot 30 so that the axis of the rod 26 is aligned with the axis 24, and a maximum adjustment position in which the slide 25 is located at the bottom of the slot 30).

[0059] The amplitude of the reciprocating motion of the drive rod 27 can be varied both in operation and at rest, the motion being reflected from the motion of the crankshaft 21 and the rod 22, acting on the rod 23. As for the drive rod 27, it can be fixed or hinged to Figure 1 and 2 on one or the other of the main connecting rods 8 and 8' of the embodiment.

[0060] exist Figure 3A In the Figure 3 In this variation, the distance between the connecting rod 22 and the driving rod 27 is adjusted by adjusting the position of the slot 30 of the hinge axis 31 of the connecting rod 22 on the rod 23, so that the distance between the hinge axis 31 of the hinged connecting rod 22 and the fixed support axis 24 of the rod can be adjusted. Thus, the distance between the axis 31 and the driving rod 27 can also be adjusted. In this variation, the distance between the driving rod 27 and the axis 24 is fixed, while Figure 3 In the embodiment of the present invention, the distance between the axis 31 and the axis 24 is fixed.

[0061] exist Figure 3B In the Figure 3 In this variation, the distance between the connecting rod 22 and the drive rod 27 is adjusted by adjusting the position of a slot 30' formed in the rod 23 along the fixed pivot axis 24 of the sink. The axis 24 of the rod is integral with a slide 25' slidably mounted in the slot 30'. The connecting rod 22 is articulated to the rod 23 along an articulation axis 31 which is in a fixed position on the rod 23. The articulation end of the drive rod 27 to the rod 23 is in a fixed position (e.g. Figure 3 ). Similarly, the rod 26 from the adjusting rod 28 is hinged to the rod 23 at a fixed position. Therefore, the relative position of the axis 24 with respect to the rod 23 can be adjusted by the rod 28, thereby adjusting the relative position of the rod 27 with respect to the axis 24 and the relative position of the rod. With respect to the axis 24, the distance between the rod 22 and the rod 22 is fixed, so the reciprocating stroke of the adjusting rod 27 is fixed.

[0062] exist Figure 4A and 4B Another embodiment is shown in FIG. Figure 3 The implementation method and Figure 4A and 4B The main difference between the embodiments is the way in which the position of the slide 25 relative to the slot 30 is adjusted.

[0063] In this embodiment, a spiral cam is used consisting of a disk 40 on which a spiral groove is formed, along which the rod 26 can move. During the rotation of the disk 40, the rod 26 follows the contour of the spiral groove, which has the effect of moving the rod 26 and the slider 25 along the groove 30. Depending on the position chosen for the rod 26 along the spiral, the rod 27 will obtain a maximum reciprocating stroke.

[0064] exist Figure 5 In FIG. 4 , another embodiment is shown, in which cylinder 41 is used instead of Figure 3 The crankshaft 29, the rest of the embodiment is the same.

[0065] exist Figure 4A , 4B In the embodiment described in 5, it is possible to provide Figure 3A and 3B The arrangement of the distance between the shaft 24 and the drive rod 27 is changed to replace the arrangement (such as Figure 3 ).

Claims

1. A needle punching device for consolidating a fiber yarn or fiber sheet by needle punching, comprising: One or more needle plates (10; 10'), the needle plate (10; 10') respectively have a needle field; one or more uprights (3; 3'), said uprights (3; 3') having a longitudinal axis (11; 11'); a drive arrangement configured to impart a reciprocating motion to one or more of the needle boards and / or needles such that the needles have an elliptical path traversed in one direction and then pass through the fiber yarn or fiber sheet in the machine direction or MD advancing direction, thereby consolidating; a sealed housing (7; 7') in which the column or a part of the column and the drive device are accommodated; and One or more needle guide boxes (4; 4'), the needle guide box (4; 4') is arranged in a corresponding opening of the sealed housing, while the needle guide box (4; 4') is installed to be inclined relative to the corresponding tilting axis (5; 5') and fixed relative to the housing (7; 7') and perpendicular to the longitudinal axis and MD direction, The column slides in the housing and passes through the housing by means of the needle threading guide box or a corresponding needle threading guide box, and the drive device includes a longitudinal drive device (6, 9, 12, 13, 14, 15; 6', 12', 13', 14'), which is configured to reciprocate one or more of the columns in a direction parallel to the longitudinal axis, It is characterized in that the driving device also includes a transverse driving device (8; 8', 9'), which is configured to make one or more points (17; 17') of the needle threading guide box reciprocate in a direction parallel to the MD direction at a certain distance from its axis (5; 5'), wherein each of the corresponding axes (5; 5') is closer to the needle than the point (17; 17') of the needle threading guide box.

2. The device according to claim 1, characterized in that The inclined axis of one or more of the needle threading guide boxes (4; 4') is located in a corresponding opening of the housing, and the corresponding needle threading guide box (4; 4') passes through the opening; and / or The drive means is configured to reciprocate one or more of the columns only vertically.

3. The device according to claim 1 or 2, characterized in that: The longitudinal drive device comprises two eccentric connecting rod shaft systems (6, 12, 13, 14) for the column (3), the head of the connecting rod (13) being articulated and connected to two eccentric shafts (12) respectively, and the two legs (14) of the connecting rod being connected to each other by articulation at the respective ends of an intermediate connecting rod (9) which is articulated to the column (3).

4. The device according to claim 1 or 2, characterized in that: The device comprises two uprights (3') and two needle guide boxes (4'), and the longitudinal drive device comprises two eccentric connecting rod shaft systems (6', 12', 13', 14'), the head of the connecting rod (13') is hinged to the corresponding eccentric shaft (12'), and the connecting rod (13') is respectively hinged to the corresponding uprights (3').

5. The device according to claim 4, characterized in that The eccentric shafts rotate at the same speed.

6. The device according to claim 4, characterized in that The eccentric shafts rotate in opposite directions.

7. The device according to claim 1, characterized in that The transverse drive device comprises a main connecting rod (8; 8'), one end of which is hingedly mounted on one or more needle threading guide boxes (4), and the other end has a device for making it reciprocate in a direction parallel to the MD direction.

8. The device according to claim 7, characterized in that The device comprises at least one second column, which is accommodated in a corresponding needle threading guide box and is provided with an auxiliary connecting rod (9'), both ends of which are hinged to the two corresponding needle threading guide boxes.

9. The device according to claim 8, characterized in that The hinge points of the main connecting rod (8') and the auxiliary connecting rod (9') coincide with the hinge points of the first needle threading guide box.

10. The device according to claim 1, characterized in that The longitudinal drive device is configured to apply reciprocating motion to at least one of the columns only in a direction parallel to the longitudinal axis.

11. The device according to claim 1, characterized in that The transverse driving device is configured to reciprocate one or more points of the needle threading guide box at a certain distance from its axis in a direction parallel to the MD direction.

12. The device according to claim 7, characterized in that A mechanical connection is provided between the main connecting rod (8; 8') and a transverse drive rod (51) driven by an eccentric shaft (12; 12') of one of the two connecting rod and eccentric shaft systems (6; 6').

13. The device according to claim 12, characterized in that The device is provided with two eccentric connecting rod shaft systems (6') and two needle threading guide boxes (4'), and the eccentric shaft (12') driving the connecting rod (13') is hinged with the needle threading guide box (4') directly connected to the connecting rod (8'), and the eccentric shaft (12') also drives the transverse driving rod (51).

14. The device according to claim 13, characterized in that The device is provided with an intermediate rod (52) which is mounted to rotate relative to an axis (53) fixed to the housing (7') and is connected to the connecting rod (51) and the main connecting rod (8') at both ends thereof.

15. The device according to claim 1, characterized in that The longitudinal drive device and the transverse drive device are accommodated inside the sealed housing.

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