CN101445998B

CN101445998B - Latch needle

Info

Publication number: CN101445998B
Application number: CN2008101823829A
Authority: CN
Inventors: A·迪博尔德
Original assignee: H Stoll & CoKg GmbH
Current assignee: Carlmeyerstol R & D Co ltd; H Stoll GmbH and Co KG; Karl Mayer R&D GmbH
Priority date: 2007-11-30
Filing date: 2008-11-28
Publication date: 2011-09-28
Anticipated expiration: 2028-11-28
Also published as: EP2065498B1; CN101445998A; EP2065498A1

Abstract

The invention relates to a latch needle (1) for a knitting machine, comprising a needle shank (6), a hook (2) molded thereon, and a latch (5) mounted so as to be pivotable in the needle shank (6), wherein the underside of the needle shank (6) has a recess (30) in the region between a hinge point (50) of the latch (5) and the hook (2).

Description

Latch needles

Technical field

The present invention relates to a kind of latch needles that is used for knitting machine, this latch needles has shank, be molded in the pinhock on this shank and be bearing in needle latch in the shank pivotally.

Background technology

Coil knocking over from the latch needles has for convenience proposed pin is carried out different improvement, and these improved purposes are, make and must as far as possible easily rise to pinhock from shank via the needle latch of closing from the coil of knocking on the pin always.

DE 15 85 099 shows shank towards the tapered latch needles of pinhock direction, wherein has towards what pinhock rose by the downside that makes shank and moves towards to realize this being tapered.Reduce the cross section of shank thus towards pinhock.The coil that slides to pinhock by the needle latch of closing has reduced to experience slight expansion by this cross section, and this makes knocking over become easy.Yet being tapered of the shank of the pin that this is known causes the A/F of pinhock to reduce, and this especially produces adverse influence when putting into pinhock with threads or with one than a hook gauge cun thick yarn.

In addition, being tapered of the shank of the pin that this is known obviously just begins after the articulated position of needle latch, so coil stronger expansion of experience suddenly when its setting in motion is to the needle latch of closing.

Summary of the invention

Task of the present invention is to propose a kind of latch needles that makes things convenient for the coil knocking over and avoid above-mentioned shortcoming simultaneously.

This task is resolved with a kind of latch needles that is used for knitting machine, this latch needles has shank, be molded in the pinhock on this shank and be bearing in needle latch on the shank pivotally, this latch needles is characterised in that, the downside of shank has recess in the articulated position of needle latch and the zone between the pinhock.By the recess of this shank downside, this shank downside at first has the trend in the sensing and has trend under pointing at last.This has realized reducing the diameter of pin and has still kept pinhock to have enough A/Fs in the zone of the needle latch of closing.When coil slided on the needle latch of closing and slides to pinhock, it is too strong that the diameter of pin reducing in the zone of the needle latch of closing avoided coil expander to get.Yet because the A/F of pinhock does not narrow down thus, so threads or thicker yarn also can be put into wherein without a doubt.

In order to make recess just can bring into play its effect when coil begins to slide on the needle latch of closing, advantageously recess at least roughly starts from certain position of shank, and the needle latch of closing begins to exceed the upside of shank from this position.Needle latch exceeds the diameter that the shank upside increases pin by it, and expands coil thus.By making recess reduce the pin diameter, can resist the expansion of coil.Should reduce the pin diameter by recess in the place that needle latch upwards exceeds shank everywhere.Therefore, further advantageously, recess at least roughly ends at the position of the tip of the tongue of the needle latch that being opposite to of shank close.This recess extends on the critical zone during to the coil knocking over pin whole then.

The shape of recess can be designed to different.Can for example be in principle arc or by two recesses trends of asking that mutually the straightway that is in favourable angle constitutes.In preferred embodiment, this recess can have the inclined plane of rising, straight section and the inclined plane of decline.This profile of recess can be made aspect manufacturing technique simply, wherein preferably can carry out rounding at straight section and the transitional region between the inclined plane.

The inclined plane of rising can be substantially equal to the upside of the needle latch of closing and the angle between the horizontal plane at least about the angle of horizontal plane.This means that the increase of the pin diameter that is caused by needle latch compensates by recess in the zone on inclined plane fully, just coil is without any expansion.

The downside that the straight section of recess can preferably be roughly parallel to the shank before the recess at least extends.In the scope of straight section, the cross section of pin does not further reduce owing to recess.Guarantee that thus this pin yet has enough stability in the zone of recess.

The outline that the inclined plane of the decline of recess can advantageously at least roughly be tangential to pinhock extends, and that is to say that recess finishes at the pinhock place with its inclined plane.At this, further advantageously, the inclined plane of the decline of recess is roughly parallel to the interior profile extension of pinhock at least.If the inclined plane is tangential to the outline of pinhock and is parallel to the interior profile extension of pinhock, so just guarantee that pinhock can be not weakened owing to recess.The material thickness of pinhock and the stability of pin structure can be owing to recess is affected thus like this.

Description of drawings

With reference to the accompanying drawings the preferred embodiment by latch needles of the present invention is described in detail below.Wherein:

Fig. 1 is the partial side view that has the needle latch of opening and be positioned at the latch needles of the coil on the shank by of the present invention;

Fig. 2 is the view corresponding to Fig. 1 with pin of the needle latch of closing and the coil on the transitional region between shank and the needle latch;

Fig. 3 is the view corresponding to Fig. 1 with the pin that slides into the coil on the needle latch;

Fig. 4 is the view corresponding to Fig. 1 with the pin that is positioned at the coil on the needle latch spoon;

Fig. 5 is the view corresponding to Fig. 1 with the pin that is positioned at the coil on the tip of the tongue.

The specific embodiment

Have pinhock 2 at the latch needles shown in Fig. 1 to 51, this pinhock has surrounded hook space 20.This pinhock 2 is molded on the pin neck 3, and this pin neck is converted to shank 6 by pin chest 4.On shank 6, needle latch 5 is bearing on the articulated position 50 in latch needles needle tray 60 pivotally.Needle latch 5 can place the closed position shown in Fig. 2 to 5 from the open position shown in Fig. 1 by coil 100.Other position that can realize needle latch 5 by the needle latch spring that does not illustrate here is as the position of half-open or semi-closure.

In the zone of pin neck 3, be provided with the recess 30 that reduces coil stress at shank 6 downsides.This recess 30 originate in needle latch 5 articulated position 50 the zone and extend to the downside of pinhock 2.

This recess 30 has first inclined plane 31 of rising in the zone of articulated position 50, preferably rise with the angle corresponding to the angle of the needle latch 5 of closing from the downside of shank 6 in this first inclined plane.This inclined plane 31 is converted to the straight section 32 of preferred parallel in the downside extension of shank 6.This section 32 and the spaced apart segment distance of pin downside, though make and reduced coil stress, but guarantee that pin neck 3 has enough intensity.At last, this recess 30 has the inclined plane 33 of decline, tangentially abuts on the outline of pinhock 2 in the example shown here of this inclined plane and is arranged essentially parallel to the interior profile extension of pinhock 2.

The transitional region between straight section 32 and two

inclined planes

31,33 and the transitional region on shank 6 to first inclined planes 31 have all been carried out rounding.

The exemplary here structure that illustrates of recess 30 stops coil 100 to open suddenly, and can not reduce the A/F of pinhock 2 thus.

Fig. 1 to 5 shows coil 100 and is being arranged in positions different on the pin 1 during the knocking over.

In Fig. 1, coil 100 is positioned at needle latch 5 back of opening on shank 6.By the direction V of pin 1 along double-head arrow P being displaced, move on the needle latch 5 from the hook space 20 of pinhock 2 via pin neck 3 and pin chest 4 coil 100 and thus this needle latch is deflected into its position of opening by means of the knitting cam that does not illustrate here.Then, this coil slides on the shank 6 via the downside 51 of the needle latch of opening 5.Move along back to back the pulling back of the direction R of double-head arrow P by pin 1, this coil 100 contacts with the upside 52 of needle latch 5, as shown in Figure 1.

If pin 1 is further retracted, this coil 100 deflects into needle latch 5 in its position of closing and begins and slides on the upside 52 of needle latch 5, as shown in Figure 2 so.Pin 1 diameter after the inclined plane 31 that the upside that almost is parallel to needle latch 5 52 of recess 30 extends makes pin diameter before the articulated position 50 of needle latch 5 with respect to articulated position 50 does not increase, and that is to say not expansion of coil 100.

In Fig. 3, further retract pin 1 by direction R along double-head arrow P, coil 100 is further moving forward on the needle latch 5 and is being positioned at inclined plane 31 on the transitional region of the straight section 32 of recess 30 at this moment.

Fig. 4 shows the end that coil 100 is positioned at the straight section 32 of recess 30, and is positioned at the top on the inclined plane 33 of decline.

By further retracting pin 1, coil 100 arrives shown in Figure 5 being close in the preceding position of knocking over.By needle latch 5 and the motion on the inclined plane 33 of the decline by recess 30 simultaneously, this coil has experienced expansion by coil 100, but this expansion is gently carried out and be protectiveness to yarn.

The design shown here of pin 1 is exemplary.This recess 30 also can have for example arc of different shapes, perhaps constitutes by two straightways that are in favourable angle mutually.

Claims

1. the latch needles that is used for knitting machine, this latch needles has shank (6), be molded in the pinhock (2) on this shank and be bearing in needle latch (5) in the shank (6) pivotally, it is characterized in that, the downside of described shank (6) has recess (30) in the articulated position (50) of needle latch (5) and the zone between the pinhock (2), described recess (30) roughly starts from certain position of shank (6), and the needle latch of closing (5) begins to exceed the upside of shank (6) from this position.

2. by the described latch needles of claim 1, it is characterized in that described recess (30) roughly finishes the position of the tip of the tongue of the needle latch (5) of closing being opposite to of shank (6).

3. by the described latch needles of claim 1, it is characterized in that described recess (30) has the inclined plane (31) of rising, straight section (32) and the inclined plane (33) that descends.

4. by the described latch needles of claim 3, it is characterized in that the inclined plane of described rising (31) are substantially equal to the upside (52) of the needle latch (5) of closing and the angle between the horizontal plane about the angle of horizontal plane.

5. by the described latch needles of claim 3, it is characterized in that the downside that the straight section (32) of described recess (30) is roughly parallel to the preceding shank (6) of recess (30) extends.

6. by the described latch needles of claim 3, it is characterized in that the outline that the inclined plane (33) of the decline of described recess (30) roughly is tangential to pinhock (2) extends.

7. by the described latch needles of claim 3, it is characterized in that the inclined plane (33) of the decline of described recess (30) is roughly parallel to the interior profile extension of pinhock (2).