JP2878166B2 - Needle selection magnet for needle selection in textile machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a needle plate to be selected which is provided with a plurality of holding magnetic pole regions by permanent magnets arranged side by side in the running direction of the needle plate. An electromagnetic control pole region consisting of at least two control poles is sandwiched between the at least two control poles. The at least two control poles are separated from each other by a thin non-magnetic spacing member and are arranged in a line. The control pole relates to a needle selecting magnet device for selecting a needle in a textile machine, wherein the holding force exerted on the needle plate by a control coil is controlled.

[0002]

2. Description of the Related Art A needle selecting magnet of this type is used for selecting a needle in a textile machine. In this case, the needle plate engaged with the needle is guided one after the other on the holding magnetic pole region and the control magnetic pole region one after another, with the needle plate being held by the holding magnetic pole region and then the control magnetic pole region. Depending on the region, the region can be kept held or released, depending on its magnetic state.

A needle selection magnet of this kind is known from EP-A-0 474 195. In this case, the known needle selection magnet has an auxiliary pole region, which in operation firstly forms a holding pole with a permanent magnet. The magnetic force of the auxiliary pole can be controlled by a corresponding control coil. In this case, the auxiliary pole region is controlled by a corresponding control of the control coil in such a way that the holding force of the permanent magnet is weakened for a predetermined period of the operating cycle, so that during the demagnetization process in the control pole region-a high operating frequency The control needle plate, which has not yet sufficiently separated from the magnetic pole surface of the needle selection magnet, can also be newly separated from the magnetic pole surface of the needle selection magnet via the auxiliary magnetic pole region. In this way, there is no risk that the needle plates will be attracted again to the subsequent holding pole region, as in the case of an arrangement without an auxiliary pole region and at a high operating speed.

[0004] However, in the case of the known needle selecting magnet, the auxiliary magnetic pole has a remarkably complicated shape, and moreover, since a plurality of auxiliary magnetic poles must be provided, the shape of the needle selecting magnet is only complicated. Thus, reasonable mass production of this type of needle selection magnet is not possible or is very costly.

[0005]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a needle selection magnet of the type described at the outset, which is suitable for high operating speeds, has one or more control pole regions and saves space. The object is to construct the device as simple as possible without assembling.

[0006]

SUMMARY OF THE INVENTION According to the present invention, the object is achieved in that the control poles are magnetically equivalent and the control poles are substantially perpendicular to the control poles. The control pole core is formed at a C-shaped control pole core, and the control pole core is formed of a flat punched member of the same type, and the control pole core is provided with a control coil. The problem is solved by nesting and arranging them alternately by 180 ° around their longitudinal axes, which are located vertically.

[0007] Claims 2 to 9 describe advantageous embodiments of the invention.

The advantages provided by the present invention include, for example:
The control poles are designed as very simple stamping members, in which case they can be provided with control coils and then nested close together. In this way, many control poles can be provided side by side in a narrow space. A further advantage is that the components for the individual control poles are identically configured, so that, in addition to being simple to manufacture, they can also be manufactured in production-friendly lot sizes.

Next, the present invention will be described in detail based on an embodiment shown in the drawings.

[0010]

FIG. 1 shows a knitting machine cylinder of a circular knitting machine so that the operation of a needle selecting magnet can be understood. The knitting machine cylinder 1 is provided with grooves 2 in which so-called needle plates 3 are provided, which are connected via transmission-coupling members, not shown here. The knitting needles 4 are controlled so as to perform or not perform the knitting operation. The needle plate 3 is provided with radially-facing thin bats 5 on the outside, which are fixed by a control cam 6 when the knitting machine cylinder rotates in the direction of arrow A. And is guided over it.

There, the bats are magnetically held at the position thus placed, or removed from that position under the control of the needle selection magnet 8.
Since the bat 5 of the needle plate 3 takes two different positions in this way, the control cam 9 that follows the needle plate 3
The bat 5 or the knitting needle connected thereto is moved to the position "Perform knitting operation" or "Perform no knitting operation".

The needle selecting magnet 8 shown in FIG. 2 has left and right holding magnetic pole regions 10 and a control magnetic pole region 11 disposed therebetween. The control pole region 11 is provided with control poles 12 located adjacent to each other, which are separated from each other by a thin non-magnetic spacing member 13. In this case, the spacing member 13 is used for magnetically separating the control magnetic pole 12. Further in the center is a guide bar 14, which is made of a hard material,
In operation, the needle plate 3 or the bat 5 slides on its surface.

The control pole 12 is formed at the control pole core 15 shown in FIG. 3, wherein the control pole core 15 is substantially C-shaped and is manufactured as a flat stamped member. A control coil 16 is mounted on the central leg of the control pole core 15.

FIG. 4 shows a modified embodiment of the control pole core 15 '. In this case, the cross-section reduction portions 25 cut off on both sides are provided in the upper region. This reduces the effective side pole face to a narrow strip, thereby allowing the interaction between adjacent control poles 12 and the action between the lateral holding pole region 10 and each adjacent control pole 12. Is reduced. Because
This is because if the control pole cores 15 'are configured in this manner, only the extremely small surfaces do not face each other.

In order to reduce the eddy current loss in the control pole core when the operating frequency is high, it may be formed as a thin plate in some cases.

The holding magnetic pole region 10 is formed at the holding magnetic pole member 17 shown in FIG. 5, and has a substantially U-shaped configuration. In this case, the holding magnetic pole member 17
As shown in FIG. 6, the notch portion 18 in FIG. 5 can form-lock the control pole core 15 together with the spacing member 13 provided therebetween in this notch portion. It is configured as follows. At this time, the expanding portion 19 in the notch portion
Used to house the control coil 16 of the control pole core 15 and for magnetic separation between the holding pole member and the control coil, ie, to increase the spacing between the holding pole material and the adjacent control coil. Used for

As further shown in FIG. 6, the control pole cores 15 are alternately turned by 180 ° about their longitudinal axis L and are nested into the individual holding pole members 17. This allows a space-saving arrangement to be achieved. In this case, each control pole core 1
5 and their respective control coils 16 are all configured identically.

As shown in FIG. 7, each of the control pole cores 15 together with their respective control coils 16 can be fitted together, if necessary, all turned 180 °.

FIG. 8 shows the needle selection magnet exploded into individual members. In this case, a vertically long permanent magnet 20 is disposed in a region below the holding magnetic pole member 17, and the permanent magnet 20 is It is magnetized over its thickness. The permanent magnet 20 is provided to obtain a force action by the permanent magnet in the holding magnetic pole region 10.

FIGS. 9 to 11 show the holder means and the casing member for the needle selecting magnet. These components are made of a non-magnetic material. In this case, FIG. 9 shows a frame-shaped support member 21, which is provided with a notch, so that it can be positively connected to the individual parts of the needle selection magnet shown in FIG. It is configured so that it can be fitted therein.

FIG. 10 shows the front cover shell 22 of the needle selection magnet, while FIG. 11 shows the rear cover shell 23. These cover shells can be formably connected to the support member and are fixedly connected to the support member by suitable connecting means. In some cases, the support member 21 and the front cover shell or the rear cover shell may be integrally formed. The front cover shell 22 is provided with two positioning shoulders 26 spaced from each other to facilitate assembly of the needle selection magnet in the textile machine.

FIG. 12 shows a modified needle selecting magnet. In this case, the sensor 2 is disposed between the holding magnetic pole area 10 and the control magnetic pole area 11 in the area of the guide bar 14.
4 are arranged. The capture and detection by these sensors 14 takes place when the needle plate or its bat 5 has been guided via the needle-selecting magnet, whereby a corresponding control signal can be triggered.

It is preferable that the width B of the control magnetic pole be larger than the width C of the holding magnetic pole region. Since the holding pole itself exerts a somewhat greater holding force on the needle plate bat 5 than the control pole, this will increase the holding strength of the control pole to about the same level.

[Brief description of the drawings]

FIG. 1 is a diagram showing a circular knitting machine cylinder provided with a needle selecting magnet.

FIG. 2 is an enlarged view of a needle selecting magnet.

FIG. 3 is a diagram showing control magnetic poles of a needle selecting magnet provided with a control coil.

FIG. 4 is a view showing a modified example of a control magnetic pole.

FIG. 5 is a diagram showing a holding magnetic pole member.

FIG. 6 is an exploded view of a holding magnetic pole member of a needle selecting magnet provided with a control magnetic pole.

FIG. 7 is an exploded view of a modified embodiment of a holding magnetic pole member of a needle selecting magnet provided with a control magnetic pole.

FIG. 8 is an exploded view of a needle selecting magnet.

FIG. 9 shows a support member for the components of the needle selection magnet.

FIG. 10 is a view showing a front cover shell.

FIG. 11 is a view showing a rear cover shell.

FIG. 12 is a view showing a modified embodiment of the needle selection magnet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Knitting machine cylinder 2 Groove 3 Needle plate 4 Knitting needle 5 Butt 6,9 Control cam 8 Selector magnet 10 Holding magnetic pole area 11 Control magnetic pole area 12 Control magnetic pole 13 Spacing member 14 Guide bar 15, 15 'Control magnetic pole core

Continued on the front page (72) Inventor Ernst-Heinrich Harting Germany Germany Hessisch Oldendorf Waldhofstrasse 9 (72) Inventor Rainer Schmidt Germany Minden Spiekkerheide 30 (72) Inventor Wilhelm Niermann Germany Germany De Stemmweder Bergstrasse 84 (72) Inventor Michael Zvar, Luebeck am Markt, Germany 6 (56) References JP-A-4-289250 (JP, A) JP-A-48-45663 (JP, A) ( 58) Fields surveyed (Int. Cl. ⁶ , DB name) D04B 15/82, 15/99

Claims (9)

(57) [Claims] (1)For the needle plate (3) to be selected,
(3) Permanent magnets arranged along the running direction (A)
A plurality of holding magnetic pole regions (10) are provided. At least two controls during the holding pole region (10)
An electromagnetic control pole region (11) consisting of magnetic poles (12)
It is sandwiched, The at least two control poles (12) are thin and non-magnetic
Are separated from each other by a typical spacing member (13) and arranged in a line.
The control pole (12) is provided with a control coil (1).
6) controls the holding force exerted on the needle plate (3).
Is configured to be Needle selection magnet device for needle selection in textile machinery
And each control pole (12) is magnetically equivalent,The The control pole (12)Perpendicular to their control poles
To positionOf a substantially C-shaped control pole core (15, 15 ')
The control magnetic pole cores (15, 15 ') are of the same type.
The control magnetic pole core has a control coil.
(16) is provided, and the adjacent control pole cores(15, 15 ')IsVertical position
Do180 ° alternately around their longitudinal axis (L)
Turn aroundNestedLine upIt is noted that
A needle selection magnet device for selecting a needle in a textile machine. 2. The needle selection magnet device according to claim 1, wherein the width (B) of the control magnetic pole (12) is larger than the width (c) of the holding magnetic pole region (10). 3. The holding pole region (10) is formed at a substantially U-shaped holding pole member (17).
The control pole cores (15, 15 ') are held shape-locked together with their control pole regions in the notch (18) in the shape of a letter to accommodate the control coil (16) of the control pole. The needle selection magnet device according to claim 1 or 2, wherein an enlarged portion (19) is provided in the cutout portion. 4. The control pole core (15 ') of the control pole comprises:
The needle selection magnet device according to any one of claims 1 to 3, wherein a cross-sectional area reducing portion (25) is provided at an upper end portion of the control magnetic pole core adjacent to the control magnetic pole. 5. The needle selection magnet device according to claim 1, wherein said control magnetic pole core (15, 15 ') is in the form of a thin plate. 6. The needle selection magnet device according to claim 1, wherein a sensor (24) is provided between the holding magnetic pole region (10) and the control magnetic pole region (11). 7. A holding magnetic pole member (17) and a control coil (1).
The control pole core (15, 15 ') with 6) and, if necessary, the sensor (24) are form-fitted into a frame-shaped support member (21) made of a non-magnetizable material. , Side cover shells (22, 23) are provided,
The needle selecting magnet device according to any one of claims 1 to 6, wherein the cover shell is also made of a non-magnetizable material and is formably connectable to the support member, and is connectable to the support member. . 8. The needle selecting magnet device according to claim 6, wherein one of the support member and both cover shells is integrally formed. 9. A needle selection magnet according to claim 7, wherein the front cover shell (22) has two spaced positioning shoulders (26).