CN113914018A - Sewing device of circular knitting machine - Google Patents
Sewing device of circular knitting machine Download PDFInfo
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- CN113914018A CN113914018A CN202111127049.XA CN202111127049A CN113914018A CN 113914018 A CN113914018 A CN 113914018A CN 202111127049 A CN202111127049 A CN 202111127049A CN 113914018 A CN113914018 A CN 113914018A
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- needle
- sewing
- needle body
- semi
- head
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- 238000009958 sewing Methods 0.000 title claims abstract description 68
- 238000009940 knitting Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 claims description 7
- 230000002950 deficient Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B9/00—Circular knitting machines with independently-movable needles
- D04B9/40—Circular knitting machines with independently-movable needles with provision for transfer of knitted goods from one machine to another
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B7/00—Linking machines, e.g. for joining knitted fabrics
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
- D04B15/02—Loop-transfer points
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B85/00—Needles
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention discloses a sewing device of a circular knitting machine, which comprises two sewing devices 1800360 formed by semi-rings0The annular sewing head disc is characterized in that one half ring can be overturned and overlapped with the other half ring; the sewing head disc is provided with sewing head fixing needles for mounting coils, and when the semi-rings are turned and overlapped, the sewing head fixing needles on the two semi-rings correspond to each other one by one; a plurality of groups of sewing head fixing needles are positioned on the edge of the semi-ring, and the head of the needle body is provided with a transverse groove; the needle body is provided with a chamfer which cuts the side surface of the needle body contacting the front surface of the coil and facing the edge of the semi-ring, and the chamfer extends forwards from the back of the needle body, and the cutting part is bigger the more forwards until the chamfer intersects with the transverse groove of the head part of the needle body. The invention has the advantages that the stitch is not easy to drop during sewing, and the defective rate can be obviously reduced.
Description
Technical Field
The invention belongs to the technical field of knitting machinery, and particularly relates to an intelligent circular knitting machine, in particular to a sewing device of the circular knitting machine.
Background
In recent years, in the field of circular knitting machines, and more specifically in the field of hosiery knitting machines, industrial upgrading is underway, mainly replacing the original machines with hosiery knitting machines with automatic sewing. The basic structure for realizing the automatic sewing function is that a sewing head disk is provided with a sewing head fixing needle, and a fabric to be sewn is hung on the sewing head fixing needle; half of the disk can be turned over with its diameter as the axis, i.e. 3600The annular sewing-head disk is actually two 1800The upper and lower half rings are overlapped after being turned over, the sewing head fixing needles on the upper and lower half rings are also in one-to-one correspondence, and the fabric hung on the sewing head needles is to be sewnThe part of the circular shape is changed into an arc shape, the coils are in one-to-one correspondence, and then the coils in one-to-one correspondence are sewed together, so that automatic sewing can be completed, and the sewing quality is superior to that of manual sewing.
In this process, the steps that may affect the stitching quality are mainly the overturning of the head disk: two sewing head fixing needles are arranged at the boundary edge of the upper semi-ring and the lower semi-ring, and when the sewing head disc is not turned over, the two adjacent needles are arranged; when the sewing head disk is turned over, they become two opposite needles. Therefore, the stitches held by the two needles are subjected to the largest tensile force, and may fall off the needles and not participate in the sewing, thereby causing defective products. Obviously, the upper and lower half rings have two junctions, and thus two sets of needles are at the edge, which we can refer to as group 1 and penultimate group 1; meanwhile, the loops of the 2 nd group needle and the 2 nd last group needle are easily separated from the needles due to the pulling of the loops of the 1 st group needle and the 1 st last group needle. It can be seen that the sets of needles located at the edges are high risk areas for producing rejects.
Disclosure of Invention
The object of the present invention is to overcome the above drawbacks and to provide a more reliable sewing device for circular knitting machines.
Therefore, the technical scheme adopted by the invention is as follows: a sewing device of a circular knitting machine comprises two sewing devices 1800360 formed by semi-rings0The annular sewing head disc is characterized in that one half ring can be overturned and overlapped with the other half ring; the sewing head disc is provided with sewing head fixing needles for mounting coils, and when the semi-rings are turned and overlapped, the sewing head fixing needles on the two semi-rings correspond to each other one by one; the method is characterized in that: several groups of sewing head fixing needles are positioned on the edge of the semi-ring, and the head of the needle body is provided with a transverse groove.
Furthermore, a plurality of groups of sewing head fixing needles are arranged on the edge of the semi-ring, the needle body of each group of sewing head fixing needles is provided with a chamfer surface, the chamfer surface cuts the front surface of the needle body, which is contacted with the coil, and the side surface of the needle body, which faces the edge of the semi-ring, extends forwards from the back, and the cutting part is larger forwards until the cutting part is intersected with the transverse groove of the head part of the needle body.
Furthermore, the oblique cutting surface is formed with the front surface of the needle body1300-1400The included angle of (a).
Furthermore, the intersection line of the chamfer and the transverse groove is modified into a smooth arc line.
The needle head fixing needle consists of a needle point, a needle body and a needle tail from front to back, and a transverse groove is formed in the position, adjacent to the needle point, of the head of the needle body; in a group of suture fixing needles corresponding to the upper half ring and the lower half ring, a needle tip of one needle is provided with a longitudinal groove, a needle body of the other needle is provided with a longitudinal groove, and the two longitudinal grooves are mutually matched.
The invention adopts a plurality of groups of special sewing head fixing needles near the edges of the upper and lower semi-rings, and a transverse groove is designed at the head of the needle body. Therefore, when the coil is hung on the stitch fixing needles, the coil can be clamped into the groove and is not easy to drop off due to the resistance of the curved surface of the groove.
In practice, the applicant has found that with such a design, there is still a certain defective rate, which may be in the range of five to two per thousand, depending on the yarn type. If the depth of the groove is increased or the curvature of the curved surface is changed to be steeper, the needle is not easily removed during sewing, but the needle is not easily removed from the sewing head disk after the sewing is completed.
Through further research, during the process of turning and overlapping the upper half ring and the lower half ring of the sewing head disk, the force applied to the coils is the elastic tension generated by pulling between the adjacent coils. Taking the sewing head fixing needle at the leftmost side of the half ring as an example, the coil carried by the sewing head fixing needle is pulled by the coils at the two sides, and the coil is led out from the left side of the sewing head fixing needle and is positioned below the sewing head fixing needle, so that the pulling force exerted on the sewing head fixing needle is towards the right lower side; according to the orthogonal decomposition method of stress, the pulling force can be immediately divided into two components of downward component and rightward component, if the downward component is larger, the coil can miss the transverse groove on the stitch fixing needle, so that needle release can occur.
As can be seen from the foregoing description, in accordance with a further aspect of the present invention, a needle is secured to the leftmost stitch of the upper ring half with the diagonal plane thereof extending substantially downwardly and rightwardly, so that during operation, the loop is not immediately stressed but is cushioned along the diagonal plane and then smoothly enters the transverse recess in the head of the needle body, thereby completing the folding and the stitching steps.
After the sewing is finished, the fabric needs to be taken down from the sewing head fixing needle, and the technical scheme of the invention does not increase the resistance when the coil normally leaves the sewing head fixing needle, so that the subsequent steps of sock taking off, sock turning over and the like can be still smoothly finished.
The bevel and the front of the needle body form 1300-1400The angle is the best scheme obtained by the applicant through practice, and the mounting effect of the sewing head fixing needle is relatively best under the angle.
The intersection line of the oblique plane and the transverse groove is corrected into a smooth arc line, so that the coil can slide on the sewing head fixing needle more smoothly, and meanwhile, burrs on the needle can be removed in the correction process, and the coil is prevented from being cut off.
The needle fixing needles are arranged on the upper half ring and the lower half ring, and are mutually corresponding, when the needle tip and the needle body are respectively provided with a longitudinal groove, the two longitudinal grooves form a channel for the movement of the needle, and the needle can carry a suture to finish the suture.
The preferable scheme can effectively reduce the defective rate in the sewing process through the comparative test of the applicant. Under the condition that other parameter conditions are completely consistent, the defective rate is reduced from five per thousand to one per thousand, and the effect is very obvious.
Drawings
FIG. 1 is a schematic view of a suturing apparatus of the present invention.
FIGS. 2 to 5 are schematic views of the needle for fixing a suture head in example 1. Wherein:
fig. 2 is a schematic view of a prior art needle for fixing a head of a suture.
Fig. 3 is a cross-sectional view a-a of fig. 2, enlarged and angled.
FIG. 4 is a schematic view of a lower stitch fixing needle in the prior art.
Fig. 5 is a sectional view taken along line a-a of fig. 4, enlarged and angled.
FIGS. 6 to 8 are schematic views of embodiment 2. Wherein:
fig. 6 is a schematic view of the upper stitch fixing needle 110.
Fig. 7 is a cross-sectional view a-a of fig. 6, enlarged and angled.
Fig. 8 is a sectional view taken along line B-B of fig. 6, enlarged and angled.
FIGS. 9 to 11 are schematic views of embodiment 3. Wherein:
fig. 9 is a schematic view of the upper stitch fixing needle 120.
Fig. 10 is a cross-sectional view a-a of fig. 9, enlarged and angled.
Fig. 11 is a sectional view taken along line B-B of fig. 9, enlarged and angled.
FIGS. 12 to 14 are schematic views of example 4. Wherein:
fig. 12 is a schematic view of the lower stitch fixing needle 210.
Fig. 13 is a cross-sectional view a-a of fig. 12, enlarged and angled.
Fig. 14 is a sectional view taken along line B-B of fig. 12, enlarged and angled.
Fig. 15 to 17 are schematic views of embodiment 5. Wherein:
fig. 15 is a schematic view of the lower stitch fixing needle 220.
Fig. 16 is a cross-sectional view a-a of fig. 15, enlarged and angled.
Fig. 17 is a sectional view taken along line B-B of fig. 15, enlarged and angled.
See fig. 1. The sewing device of the hosiery machine comprises a sewing head disc consisting of an upper half ring 1 and a lower half ring 2, wherein the upper half ring 1 is fixedly arranged on a frame, and the lower half ring 2 can turn around a shaft; at one position, the lower half ring 2 and the upper half ring 1 are spliced into a complete ring on the same plane; in the other position, the lower half ring 2 is turned upside down and stacked below the upper half ring 1. The upper and lower half rings are respectively provided with upper sewing head fixing needles 10 and lower sewing head fixing needles 20 which are orderly arranged into a ring shape, and the upper and lower half rings are equal in quantity and are in one-to-one correspondence when the lower half ring is overturned and superposed. The above is the prior art and is not overly expanded here.
In one embodiment, the upper suture fixing needle 100 and the lower suture fixing needle 200 with special structures are arranged at the edges of the upper half ring and the lower half ring; in another embodiment, the edges of the upper and lower half rings have specially configured upper stitch fixing pins 110, 120 and lower stitch fixing pins 210, 220, respectively, as described in the following embodiments. Of course, the number of the special sewing head fixing needles can be increased, such as 8 or 12.
Detailed Description
Example 1, see fig. 2-5:
the left side and the right side of the upper half ring are respectively provided with an upper sewing head fixing needle 100 which consists of a needle point 101, a needle body 102 and a needle tail 103 from front to back, the needle tail is used for fixing the needle on a sewing head disc, the needle point is provided with a longitudinal groove 104, the head of the needle body is provided with a transverse groove 105, and the transverse groove penetrates through the needle body in the width direction. As seen in FIG. 3, the needle body has a rectangular cross-section.
The left side and the right side of the lower half ring are respectively provided with a lower sewing head fixing needle 200 which consists of a needle point 201, a needle body 202 and a needle tail 203 from front to back, the needle tail is used for fixing the needle on a sewing head disc, the needle body is provided with a longitudinal groove 204, the head of the needle body is provided with a transverse groove 205, and the transverse groove penetrates through the needle body in the width direction. From fig. 5, the needle body has a rectangular cross section with grooves.
After the lower half ring is turned over, the upper stitch fixing needles 100 correspond to the lower stitch fixing needles 200 one by one, and the coils are clamped in the grooves 105 and 205 and are not easy to fall off.
Example 2, see fig. 6-8:
in this embodiment, the leftmost needle 110 is composed of a needle tip 111, a needle body 112, and a needle tail 113 from front to back, the needle tail is used to fix the needle to the needle disk, the needle tip has a longitudinal groove 114, the needle body has a transverse groove 115 at its head, and the transverse groove passes through the needle body in the width direction; with the face 116 having the transverse groove 115 as a front face, viewed from the angle facing the front face 116, there is a left side face 117 with a chamfer 118 cutting the front face 116 and the left side face 117. As can be seen from fig. 7 and 8, the section of the needle body is a pentagon formed by cutting a rectangle, and the cutting part is gradually enlarged from the back to the front. The chamfer 118 eventually extends to meet the transverse groove 115 to form an intersecting smooth arc 119.
See the figure7-8, the angles α, β formed by the chamfer 118 and the front 116 and left 117 sides are both 1350。
Example 3, see fig. 9-11:
in this embodiment, the rightmost upper needle 120 in fig. 1 has a shape and a structure symmetrical to the upper needle 110 in embodiment 2. Reference numerals 121-129 are also the same as 111-119 in embodiment 2.
Example 4, see fig. 12-14:
in this embodiment, the leftmost lower stitch fixing needle 210 in fig. 1 is composed of a needle point 211, a needle body 212, and a needle tail 213 from front to back, the needle tail is used to fix the needle to a stitch disk, the needle body has a longitudinal groove 214, the needle body has a transverse groove 215 at its head, and the transverse groove penetrates through the needle body in the width direction; with the face 216 having the transverse groove 215 as a front face, viewed from the angle facing the front face 216, there is a left side face 217 with a chamfered face 218 cutting the front face 216 and the left side face 217. As can be seen from fig. 7 and 8, the section of the needle body is a pentagon formed by cutting a rectangle, and the cutting part is gradually enlarged from the back to the front. The chamfer 218 ultimately extends to meet the transverse groove 215 and the longitudinal groove 214 to form an intersecting smooth arc 219.
Example 5, see fig. 15-17:
in this embodiment, a lower stitch fixing needle 220 on the rightmost side in fig. 1 has a shape and a structure bilaterally symmetrical to the lower stitch fixing needle 210 of embodiment 4. Reference numeral 221-.
In the above embodiments 2-5, the upper half ring 2 and the lower half ring 2 are mounted together on the stitch disk of the hosiery machine, and after the lower half ring 2 is turned over, the upper stitch fixing needle 110 corresponds to the lower stitch fixing needle 210, and the upper stitch fixing needle 120 corresponds to the lower stitch fixing needle 220, so that a better stitching effect can be obtained.
It is worth pointing out that the size of the above-mentioned sewing head fixing needle is quite small, and the structure of the groove, the inclined plane and the like is processed on the needle, so that the needle is free from micro-carving, and the needle is difficult to be seen by naked eyes without the aid of equipment such as a magnifying glass. It is these minor changes that accomplish the object of the present invention in consideration of its working environment and objects.
Claims (5)
1. A sewing device of a circular knitting machine comprises two sewing devices 1800360 formed by semi-rings0The annular sewing head disc is characterized in that one half ring can be overturned and overlapped with the other half ring; the sewing head disc is provided with sewing head fixing needles for mounting coils, and when the semi-rings are turned and overlapped, the sewing head fixing needles on the two semi-rings correspond to each other one by one; the method is characterized in that: several groups of sewing head fixing needles are positioned on the edge of the semi-ring, and the head of the needle body is provided with a transverse groove.
2. The suturing device of claim 1, wherein: the needle body of the needle fixing needles is provided with a chamfer which cuts the front surface of the needle body contacting the coil and the side surface facing the edge of the semi-ring, and the chamfer extends forwards from the back of the needle body, and the cutting part is bigger the farther forwards until the chamfer intersects with the transverse groove of the head of the needle body.
3. The suturing device of claim 2, wherein: the oblique cutting plane and the front surface of the needle body form 1300-1400The included angle of (a).
4. The suturing device of claim 2, wherein: and the intersection line of the oblique plane and the transverse groove is corrected into a smooth arc line.
5. The suturing device of any one of claims 1-4, wherein: the needle head fixing needle consists of a needle point, a needle body and a needle tail from front to back, and a transverse groove is formed in the position, adjacent to the needle point, of the head of the needle body; in a group of suture fixing needles corresponding to the upper half ring and the lower half ring, a needle tip of one needle is provided with a longitudinal groove, a needle body of the other needle is provided with a longitudinal groove, and the two longitudinal grooves are mutually matched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111127049.XA CN113914018A (en) | 2021-09-26 | 2021-09-26 | Sewing device of circular knitting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111127049.XA CN113914018A (en) | 2021-09-26 | 2021-09-26 | Sewing device of circular knitting machine |
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| Publication Number | Publication Date |
|---|---|
| CN113914018A true CN113914018A (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111127049.XA Pending CN113914018A (en) | 2021-09-26 | 2021-09-26 | Sewing device of circular knitting machine |
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| CN (1) | CN113914018A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3149383A1 (en) * | 1981-04-04 | 1982-11-18 | Rhein-Nadel Maschinennadel GmbH, 5100 Aachen | Sewing-machine needle |
| CN104988666A (en) * | 2015-08-04 | 2015-10-21 | 程林森 | Cloth hanging plate for sewing machine and cloth hanging needle |
| CN105899721A (en) * | 2014-01-21 | 2016-08-24 | 格罗兹-贝克特公司 | Sewing needle with double twist groove |
| CN107574587A (en) * | 2016-11-03 | 2018-01-12 | 绍兴金昊机械制造有限公司 | Head sewing machine captures pin control device |
| CN108642726A (en) * | 2018-08-16 | 2018-10-12 | 浙江叶晓针织机械有限公司 | Toe linking fixing device |
-
2021
- 2021-09-26 CN CN202111127049.XA patent/CN113914018A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3149383A1 (en) * | 1981-04-04 | 1982-11-18 | Rhein-Nadel Maschinennadel GmbH, 5100 Aachen | Sewing-machine needle |
| CN105899721A (en) * | 2014-01-21 | 2016-08-24 | 格罗兹-贝克特公司 | Sewing needle with double twist groove |
| CN104988666A (en) * | 2015-08-04 | 2015-10-21 | 程林森 | Cloth hanging plate for sewing machine and cloth hanging needle |
| CN107574587A (en) * | 2016-11-03 | 2018-01-12 | 绍兴金昊机械制造有限公司 | Head sewing machine captures pin control device |
| CN108642726A (en) * | 2018-08-16 | 2018-10-12 | 浙江叶晓针织机械有限公司 | Toe linking fixing device |
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