JP2005163249A - Needle punching apparatus for fiber web - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a needle punching apparatus for a fiber web, having a simplified structure so that extreme simplification of the structure is guaranteed without requiring removal of a needle bed driving device in the direction of traveling of the fiber web. <P>SOLUTION: This needle punching apparatus for the fiber web has a needle board (1) which is reciprocatingly driven in the direction of punching needles by means of an eccentric wheel driving device, wherein the needle board is axially attached to the eccentric wheel driving device which is equipped with connecting rods (4) and holds two eccentric wheel shafts (2, 3) positioned parallel and driven in the direction reverse to each other by means of push rods (6) which are each supported inside guide sleeves (7) to be transferred, and each of the guide sleeves (7) is supported so as to be swung around a shaft (8) extending in the direction parallel to the eccentric wheel shafts (2, 3). Further, both of the eccentric wheel shafts (2, 3) have angular positions (ψ) different from each other, and the connecting rods (4) of both the eccentric wheel shafts (2, 3) extend in the direction of inclining to each other. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a fiber web needle punch device having a needle board that can be driven back and forth in the needle piercing direction via an eccentric wheel drive device, and each needle board is movable in one guide sleeve. Via a supported push rod, it is pivotally attached to an eccentric wheel drive device comprising two parallel eccentric wheel shafts with connecting rods and drivable in opposite directions, the guide sleeve extending parallel to the eccentric wheel shaft It is related with what is supported so that rocking is possible around an axis.

  In order to increase the feeding of the fiber web in a space-saving structure, two parallel, which are provided with connecting rods and can be driven in opposite directions with each other via push rods movably supported in one guide sleeve A needle board is pivotally attached to an eccentric translating drive device including an eccentric wheel shaft, and a guide sleeve is supported so as to be swingable around an axis extending parallel to the eccentric wheel shaft, whereby the needle board is additionally provided in the fiber web passing direction. It is known from German Offenlegungsschrift 1 199 945 to allow the guide sleeve to be swiveled to drive it. In order to drive the guide sleeve, an eccentric wheel drive device including two eccentric wheel shafts is used. The connecting rods of these eccentric wheel shafts are connected to the connecting piece, and a guide arm fixedly connected to the guide sleeve is pivotally attached to the connecting piece. The travel of the pivot point of the guide arm on the connecting piece is related to the movement of the connecting piece, and thus to the mutual phase position of both eccentric wheel shafts for a given eccentricity, so a device that changes the mutual angular position of the eccentric wheel shafts. Thus, the swinging stroke of the guide sleeve can be adjusted. With this structure, the connecting rod of the eccentric wheel driving device for moving the needle board in the fiber web passing direction can be kept short, so that the eccentric wheel driving device can be accommodated in the same housing as the main drive shaft. Due to the additional eccentric drive for driving the needle board in the web passing direction, a corresponding construction cost is incurred.

  Therefore, the problem underlying the present invention is that the needle punch of the first type of fiber web is assured so that the structure can be significantly simplified without having to stop the needle bed drive in the direction of passage of the fiber web. The device is constituted by simple structural means.

  The present invention solves the given problem by both eccentric wheel shafts having different angular positions and the connecting rods of both eccentric wheel shafts extending at an angle to each other.

  The connecting rods of both eccentric wheel shafts that can be driven in opposite directions for driving the needle board in the piercing direction do not have an intermediate position extending in the piercing direction as usual, but are inclined with respect to each other and thus in the piercing direction. The needle board can be driven along a closed trajectory curve due to the phase shift between both of these eccentric wheel shafts, since it extends with an inclination in the opposite direction. This is because, when considering the forced guidance of the connecting rod, the push rod can be swung around the swinging shaft of the guide sleeve together with the guide sleeve via the connecting rod.

    When a single needle board is provided, this forced guidance can be simply ensured by the connecting rod acting on the push rod via a coaxial pivot shaft. However, the needle board drive device according to the invention can also be extended to two needle boards provided back and forth in the fiber web passing direction, these needle boards being pushed in a swingable guide sleeve. It is driven by a common eccentric wheel drive device through the rods. In this case, the push rods of both needle boards are connected by a connecting piece on which the connecting rod of the eccentric wheel shaft acts. However, in order to forcibly guide the connecting rods of both eccentric shafts, the connecting piece must be additionally guided. For this reason, the connecting piece is supported in the reciprocating guide piece and is swung about an axis parallel to the eccentric wheel axis with respect to an intermediate position extending in the needle piercing direction. This reciprocating guide piece enables the reciprocating movement of the connecting piece required in the piercing direction for driving the needle board, and the connecting piece is structurally defined for its additional swing support during the piercing process. Thus, it swings sideways with respect to the piercing direction, thereby causing a proper swinging displacement of the push rod supported in the guide sleeve. As the reciprocating guide piece, a moving guide piece supported so as to be swingable around an axis parallel to the eccentric wheel axis can be provided. Another possible configuration of the reciprocating guide piece is to pivotally connect the connecting piece to at least one guide arm extending transversely to the piercing direction. If a symmetrical relationship is required for driving both needle boards, linear guidance of the pivot shaft between the connecting piece and the reciprocating guide piece is also performed via a suitable four-bar linkage.

  In order to be able to adjust the needle bed stroke in the fiber web passing direction during the needle punching process, it is only necessary to shift the mutual angular position of both eccentric wheel shafts, which can be easily solved structurally.

  The drawings show an embodiment of the present invention.

  As can be seen from the principle diagram according to FIG. 1, the eccentric wheel drive device for driving the needle board 1 of the fiber web needle punch device has two eccentric wheel shafts 2 and 3, and the connecting rod 4 of these eccentric wheel shafts is coaxial. Via the pivot shaft 5, it acts on mutually parallel push rods 6 provided back and forth in the direction of the pivot shaft 5, and these push rods 6 are connected to the needle board 1. These push rods 6 are supported so as to be swingable around a common shaft 8 parallel to the eccentric wheel shafts 2 and 3. Both eccentric wheel shafts 2 and 3 are out of phase with each other by an angle φ, so that when the eccentric wheel shafts 2 and 3 are driven to rotate in the opposite direction, in cooperation with the mutual inclination of the connecting rod 4 The trajectory curve 9 of the pivot axis 5 is generated. The track curve 9 of the pivot shaft 5 generates a track curve 10 for the needle board 1 due to the swingable support of the guide sleeve, and this track curve 10 becomes a track curve 10 as indicated by the circular arrows. On the other hand, it extends in the opposite direction. In FIG. 1, the needle board 1 is shown at the end of the swinging stroke in the fiber web passing direction 11 after passing the lower inversion point of the trajectory curve 10 during the withdrawal of the needle from the fiber web. The orbital curves 9 and 10 show the eccentricity of the eccentric wheel shafts 2 and 3, the distance between these eccentric wheel shafts, the phase angle φ between both eccentric wheel shafts 2 and 3, and the effectiveness of each of the connecting rod 4 and the push rod 6. It is determined by the conversion ratio caused by the lever arm length.

  2 and 3 show the structural configuration of the eccentric wheel drive device according to FIG. Both eccentric wheel shafts 2 and 3 are supported in a housing 12 held by a machine mount 13. A guide sleeve 7 is supported on the housing 12 and is coupled to each other by a beam 14. The swing shaft 8 of the sleeve 7 is rotatably held by a bearing body 15 of the housing 12. In order to seal the guide sleeve 7 swingable with respect to the housing 12, a suitable sealing bellow 16 is used. The push rod 6 supported in the guide sleeve 7 so as to be movable in the axial direction is pivotally connected to the connecting rod 4 of the eccentric wheel shafts 2 and 3, and the pivot shaft 5 extends coaxially with each other. The eccentric wheel shafts 2 and 3 passing through the bearings 17 of the housing 12 are driven in the opposite directions and are provided with counterweights 18 for mass balance.

  FIG. 4 shows an eccentric wheel drive device for driving two needle boards 1 provided back and forth in the web passing direction 11, and the push rods 6 of these needle boards are guided according to the embodiment of FIGS. 2 and 3. It is supported in the sleeve 7 so as to be movable in the axial direction, and is held so as to be swingable around the swing shaft 8 together with the guide sleeve 7. However, the connecting rods 4 of both eccentric wheel shafts 2 and 3 act on the push rod 6 via the connecting piece 19 rather than directly. The pivot shaft between the connecting rod 4 and the connecting piece 19 is labeled 20, and the pivot shaft between the connecting piece 19 and the push rod 6 is labeled 21. The pivot shafts 20 and 21 can also coincide with each needle board 1 when a suitable reverse inclination of the connecting rod 4 with respect to the needle piercing direction is taken into account.

  In order to forcibly guide the connecting piece 19, the connecting piece 19 is supported in a reciprocating guide piece 22, and according to the illustrated embodiment, the reciprocating guide piece 22 comprises a moving guide piece for the connecting piece 19. Yes. The movement guide piece is supported in the housing 12 so as to be swingable around an axis 23 parallel to the eccentric wheel shafts 2 and 3 with respect to an intermediate position extending in the needle piercing direction. By this means, when the eccentric wheel shafts 2 and 3 are driven with a mutual phase angle, the reciprocating motion of the connecting piece 19 is related to the swinging motion around the shaft 23. The needle bar 1 provided on the push rod 6 and therefore the push rod 6 is supported so as to reciprocate around the rocking shaft 8 of the guide sleeve 7 to guarantee an additional rocking stroke in the fiber web passing direction 11. To do. Another possibility for constructing the reciprocating guide piece 22 is to provide a guide arm device which is preferably a watt linear motion mechanism on which a linear guide piece, for example a connecting piece, is pivotally mounted.

  1 shows a schematic principle view of an eccentric wheel drive device for a needle punch device of a fiber web according to the invention.   1 shows a needle board drive device constructed according to the principle diagram of FIG. 1 in a simplified cross-sectional view perpendicular to the eccentric wheel axis.   Sectional drawing by the III-III line of FIG. 2 is shown.   FIG. 3 shows a view corresponding to FIG. 2 of a needle board driving device according to the invention for two needle boards provided back and forth in the fiber web passing direction.

Explanation of symbols

1 Needle board 2, 3 Eccentric wheel shaft 4 Connecting rod 5 Pivoting shaft 6 Push rod 7 Guide sleeve 8 shaft

Claims (4)

  A needle punching device for a fiber web, which has a needle board that can be reciprocated in the needle piercing direction via an eccentric wheel drive device, and each of the needle boards is movably supported in one guide sleeve. The guide sleeve is pivotally mounted about an axis extending parallel to the eccentric wheel axis, via a bar, pivotally mounted on an eccentric wheel drive comprising two parallel eccentric wheel shafts with connecting rods and capable of being driven in opposite directions. In the swingable support, both eccentric wheel shafts (2, 3) have different angular positions (φ), and the connecting rods (4) of both eccentric wheel shafts (2, 3) are inclined with respect to each other. A needle punching device for fiber webs, characterized in that it extends.   2. Device according to claim 1, characterized in that when a needle board (1) is provided, the connecting rod (4) acts on the push rod (6) via a coaxial pivot shaft (5). .   When two needle boards (1) are provided back and forth in the fiber web passage direction (11), the push rods (6) of both needle boards (1) are connected to the connecting rods (4, 4) of the eccentric wheel shafts (2, 3). ) Are connected by a connecting piece (19) acting, and the connecting piece (19) is supported in the reciprocating guide piece (22), and with respect to the eccentric wheel shaft (2, 3) with respect to an intermediate position extending in the needle piercing direction. 2. The device according to claim 1, characterized in that it is swingable about parallel axes (2, 3).   Device according to one of claims 1 to 3, characterized in that both eccentric wheel shafts (2, 3) are adjustable in their mutual angular position.

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