JPH0649715A - Nipper unit for combing machine - Google Patents

Abstract

PURPOSE: To completely comb fiber tufts with a top combing machine. CONSTITUTION: A nipper unit has a nipper frame 5 supporting a lower nipper plate 6 and a top nipper arm 7 pivotally supported on the frame 5 supports a top nipper plate equipped with the bottom edge cooperating with the front edge of the lower nipper plate in order to firmly hold a lop to be combed. A rotating arm 12 pivotally connected with the nipper frame supports a fiber- supporting member 13. The rotating arm holds the member 13 at a return position above the plate 6 when closing the nipper unit and can rotate toward the front position when opening the nipper unit, at which the member 13 projects forward on the rise from the front edge of the plate 6. Thus, fiber tufts caused by being torn from a lap with detaching rollers 2 and 3 through needles of a top combing machine are supported immediately behind the top combing machine and are completely combed with the top combing machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nipper unit of the type described in the superordinate concept of claim 1.

[0002]

In a known nipper unit of the above type (U.S. Pat. No. 3,310,411), a movable fiber support member is a plate guided linearly along the lower surface of a lower nipper plate. Alternatively, it is formed as a blade.

This plate or blade is used to support the fiber tufts of the wrap to be combed after opening the nipper unit, which wraps the lower nipper plate and the upper nipper plate when the nipper unit is closed. Is clamped immovably between and pressed downwards by the upper nipper plate, which is then combed by the rotating circular comb.

This allows the fibers that are pulled out of the wrap by the detaching device when the nipper unit is opened to be pulled out completely through the top combs located between the nipper unit and the detaching device.

However, especially when the top comber does not extend to the lower side of the lower surface of the lower nipper plate for space reasons, such an effect cannot be obtained.
This is especially true in the case of cotton and similar combing machines for relatively short staple fibers where the distance between the detaching device and the open nipper unit and circular comb must be small due to the limited fiber length. Applicable

In addition, an extended friction surface is required to guide the generally longitudinally long fiber-bearing blade in a linearly displaceable manner, and the risk of tipping of the fiber-bearing blade then arises.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to avoid the above-mentioned drawbacks and to provide a nipper unit of the type mentioned at the outset, in which the fiber support member causes the fiber tufts of the lower nipper plate to open when the nipper unit is opened. It is not only to support it in the front, but to improve it so that it can be lifted upward.

[0008]

According to the present invention, the above-mentioned problems are solved by the nipper unit according to the present invention described in the characterizing part of claim 1.

[0009]

Since the fiber support member is supported by an arm pivotally connected to the nipper frame, the fiber support member moves forward and upward simultaneously when the nipper unit is opened. The swivel bearing causes only very little friction. Each pivot arm is connected to one upper nipper arm.

When the upper nipper arms move synchronously with each other when the nipper unit is opened and closed, both swivel arms are also moved synchronously by the upper nipper arm. This avoids tilting of the fiber support member.

Since the fiber support member is located over the lower nipper plate, it is possible to arrange guide members for guiding the side edges of the wrap to be combed, advantageously at both ends of the fiber support member. , The guide member moves with the fiber support member.

[0012]

1 schematically shows a comb head of a combing machine, in which a continuously rotatable circular comb shaft 1 and two detaching rollers 2, 3 reciprocating in a Pilger step motion are all shown. The telescopic pedestal bearing shaft 4 supported on a machine frame (not shown) is shown.

The comb head has a nipper unit having a lower nipper which is composed of a nipper frame 5 and a lower nipper plate 6 supported by the nipper frame 5 only partially shown.

The front end of the nipper frame 5 is pivotally mounted in a conventional manner to a front support, which is pivotable about the axis of the circular comb shaft 1.

The rear end (not shown) of the nipper frame 5 is pivotally attached to a nipper arm (also not shown) which holds the nipper frame 5 during operation of the combing machine as shown in FIG. A reciprocating motion is made between the end position and the feed end position shown in FIG.

The upper nipper plate 7 is supported by an upper nipper arm 8 pivotally supported by the nipper frame 5 about a shaft 9. Further, the upper nipper arm 8 is pivotally mounted with a telescopic pedestal 10 which is rotatable around the telescopic pedestal support shaft 4.

When the nipper frame 5 reciprocates, the telescopic pedestal 10 causes the upper nipper arm 8 and thus the upper nipper plate 7 to reciprocate between the positions shown in FIGS. 1 and 2 with respect to the nipper frame 5.

When the nipper frame 5 occupies the return end position shown in FIG. 1, the nipper unit is closed and the lower edge of the upper nipper plate 7 is in front of the lower nipper plate 6 by the action of the telescopic pedestal 10. It is pressed against the edge.
When the nipper frame 5 occupies the feed end position shown in FIG. 2, the nipper unit is opened.

On the nipper frame 5, two swivel arms 12 are supported so as to swivel around a shaft 11. The swivel arms 12 are strip-shaped or strip-shaped fiber support members 13.
I support you.

The swivel arm 12 is formed as a lower lever arm of a two-armed lever, and an upper lever arm 14 of the two-armed lever is swiveled around a shaft 15 at one end of a link. Is pivotally attached. The other end of each link 16 is pivotally connected to the upper nipper arm 8 about a shaft 17.

When the nipper frame 5 occupies the return end position shown in FIG. 1 and the nipper unit is closed, the swivel arm 12 connected to the upper nipper arm 8 via the link 16 is a fiber support member 13. Is held at a position above the lower nipper plate 6 (see FIG. 1).

When the nipper frame 5 is moved toward the feed end position shown in FIG. 2 and the nipper unit is opened, the swivel arm 12 moves the fiber support member 13 to the forward position (see FIG. 2). The fiber support member 13 projects forward and upward from the front edge of the lower nipper plate 6 in this forward position.

During operation, the lap to be combed (not shown) rotates intermittently to carry the wrap,
It moves toward the supply cylinder 18 supported in the nipper frame 5. The supply cylinder 18 conveys the wrap toward the front edge of the lower nipper plate 6 via the upper surface of the fiber support member 13.

In the position shown in FIG. 1, the front end section or fiber tuft of the wrap is fixedly clamped between the front edge of the lower nipper plate 6 and the lower edge of the upper nipper plate 7 and the upper nipper plate 7 Being pushed downwards by the lower edge, the fiber tufts are combed by a circular comb segment 19 provided on a circular comb roller 20 which rotates with the circular comb shaft 1.

Next, the nipper frame 5 moves forward, the nipper unit is opened, and the fiber support member 13 moves forward and upward with respect to the lower nipper plate 6. As a result, the fiber tufts located on the fiber support member 13 are lifted and supported immediately after the needle 21 of the top comb 22 supported by the nipper frame 5.

In this case, the fiber front end or tip of the fiber tuft is on the end of a preformed combing machine fleece which is fed back from the clamping line of the detaching rollers by the reverse rotation of the detaching rollers 2, 3. It is located and, with this fleece end, is drawn back into the tightening line.

The fibers thus gripped of the fiber tufts torn from the wrap immediately pass between the needles 21 of the top comber 22 as the fiber tufts are supported by the fiber support member 13 which is fed and lifted forward. , And in this case does not leave the top comb again early and is not sucked downwards by the air flow.

The downward air flow between the front edge of the lower nipper plate 6 and the detaching rollers 2, 3 is generated by a negative pressure, which is usually a circular comb roller 20.
Is used to carry out the combing wastes and the like which have been controlled in the range of and which have been removed from the fiber material.

At both lateral ends of the fiber support member 13, lateral guide members 23 are arranged, which are fixed to the fiber support member 13 and / or the swivel arm 12 or It is formed integrally with the support member 13 and / or the pivot arm 12 and thus moves with the fiber support member 13.

The lateral guide members 23 are used to guide the lateral edges of the wrap and prevent lateral spreading of the fibers from the wrap. Since the lateral guide member 23 moves together with the fiber support member 13, the lateral guide member 23 guides the lateral edge of the wrap immediately after the top comb 22 when the nipper unit is opened (see FIG. 2).

FIG. 3 shows a modified embodiment in a sectional view similar to that of FIG. 1, in which case the embodiment of FIG.
The difference is that the upper lever arm 14 of the arm-shaped levers 12, 14 is connected to the upper nipper arm 8.

The upper end of each lever arm 14 has a first
Rather than being pivotally attached to the link 16 as shown, it carries a pin 24 which engages in a groove 25 which moves with the upper nipper arm 8. Groove 25 is upper nipper arm 8
It can be formed in itself or in a plate (not shown) fixed to the upper nipper arm 8.

When the nipper unit is closed as shown in FIG. 3, the pivot arm 12 holds the fiber support member 13 above the lower nipper plate 6 in the position shown.

When the nipper unit is opened, the swivel arm 12 connected to the upper nipper arm 8 through the pin 24 and the groove 25 moves the fiber supporting member 13 to the front position (see FIG. 2) with respect to the lower nipper plate 6. (Corresponding to the position shown in the figure), and in this front position, the fiber support member 13 projects forward and upward from the front edge of the lower nipper plate 6.

In many combing machines having a reciprocating nipper frame, the front end position of the nipper frame is adjustable so that the leading edge of the lower nipper plate has a different spacing from the detaching roller at the feed end position.

When the feed end position of the nipper frame is adjustable, the pivoting movement of the upper nipper arm with respect to the nipper frame is not always the same when the nipper unit is opened. This is the case, for example, if the pivoting movement of the upper nipper arm is produced by the telescopic pedestal 10 pivotally mounted on the upper nipper arm, as described above.

Even if the swivel angle of the upper nipper arm 8 is changed, the swivel arm 12 and the swivel arm 12 are arranged so that the fiber support member 13 can be swung forward substantially at the same degree and upward during the opening of the nipper unit. The connection between the upper nipper arm 8 and the upper nipper arm 8 has an adjustable member.

For example, in FIGS. 1 and 2, the length of the upper lever arm 14 or the position of the pivot point 15 of the link 16 on the lever arm 14 or the position of the link / pivot shaft 17 on the upper nipper arm 8 can be adjusted. is there.

Similarly, in FIG. 3 as well, the lever arm 14
The length of the pin 24 or the position of the pin 24 on the lever arm 14 is adjustable or the groove 25 is fitted in the upper nipper arm 8
It can also be formed in a plate adjustable relative to.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view of a comb head of a combing machine with a nipper unit returned and closed.

FIG. 2 is a vertical sectional view similar to FIG. 1 with the nipper unit fed and opened.

FIG. 3 is a vertical sectional view similar to FIG. 1 of a modified embodiment.

[Explanation of symbols]

 1 circular comb shaft 2, 3 detaching roller 4 telescopic pedestal bearing shaft 5 nipper frame 6 lower nipper plate 7 upper nipper plate 8 upper nipper arm 9, 11, 15, 17 axis 10 telescopic pedestal 12 swivel arm 13 fiber support member 14 Lever arm 16 Link 18 Supply cylinder 19 Circular comb segment 20 Circular comb roller 21 Needle 22 Top comb 23 Side guide member 24 Pin 25 Groove

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Olivier Wust Switzerland Zeuitzach Gladioren Strasse 29

Claims (5)

[Claims] 1. A nipper unit for a combing machine, comprising a nipper frame (5) and a lower nipper plate (6) supported by the nipper frame (5), and a nipper frame (5). Upper nipper plate (6) with a lower edge co-operating with the leading edge of the lower nipper plate (6) for immovably tightening the wrap to be combed, which is supported by an upper nipper arm (8) pivotably supported on the plate. 7) and the fiber support member (1) movably held by the lower nippers (5, 6).
3) and the fiber support member (13)
However, when the nipper unit is opened, the fiber support member (1
3) is supported by a swivel arm (12) pivotally connected to the nipper frame (5) about an axis (11), which swivel arm (12) is provided when the nipper unit is closed. Holding the fiber support member (13) in the upper return position of the lower nipper plate (6) and with the fiber support member (13) facing upwards with respect to the front edge of the lower nipper plate (6) when the nipper unit is opened. Connected to an upper nipper arm (8) so that it can be pivoted to a forward position such that
Nipper unit for combing machines. 2. When the nipper unit is opened, the fiber support member (13) pivots to a forward position in which the fiber support member (13) projects forward and upward from the front edge of the lower nipper arm (6). The nipper unit according to claim 1, which is allowed to move. 3. A guide member (23) movable with the fiber support member (13), which guides the side edges of the wrap to be combed, to both lateral ends of the fiber support member (13).
The nipper unit according to claim 1, wherein the nipper unit is arranged. 4. The swivel arm (12) is formed as a lever arm of a two-arm lever (12, 14),
Nipper unit according to any one of claims 1 to 3, wherein the other arm (14) of the lever is connected to the upper nipper arm (8) via a link (16). 5. The swivel arm (12) is formed as a lever arm of a two-armed lever (12, 14),
4. An arm according to claim 1, wherein the other arm (14) of the lever is connected to the upper nipper arm (8) via a pin (24) which engages in a groove (25). Nipper unit.