CN107217396B - Hemming machine pressure bar mechanism and hemming machine - Google Patents

Hemming machine pressure bar mechanism and hemming machine Download PDF

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Publication number
CN107217396B
CN107217396B CN201710353246.0A CN201710353246A CN107217396B CN 107217396 B CN107217396 B CN 107217396B CN 201710353246 A CN201710353246 A CN 201710353246A CN 107217396 B CN107217396 B CN 107217396B
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CN
China
Prior art keywords
rod
seat post
pressure
connecting part
presser
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Active
Application number
CN201710353246.0A
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Chinese (zh)
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CN107217396A (en
Inventor
宋国庆
芈韶雷
吴平
赵林蔚
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Jack Technology Co Ltd
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Jack Sewing Machine Co Ltd
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Priority to CN201710353246.0A priority Critical patent/CN107217396B/en
Publication of CN107217396A publication Critical patent/CN107217396A/en
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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/02Presser-control devices
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/12Presser-foot attachment

Abstract

The invention provides a hemming machine presser bar mechanism, which comprises a presser bar, a presser foot arm, a presser bar spring, a damping seat post arranged in the presser bar and a presser bar damping rod movably arranged in the presser bar, wherein the presser bar damping rod comprises a damping rod body part extending along the axial direction of the presser bar and a seat post connecting part and a presser foot arm connecting part which are respectively arranged at two ends of the damping rod body part, the presser bar spring acts on the damping seat post to ensure that the damping seat post is abutted against the seat post connecting part and the presser foot arm connecting part are abutted against each other, the damping seat post is in point-surface contact with the seat post connecting part and the presser foot arm connecting part are in point-surface contact with the presser foot arm, thereby greatly reducing the friction resistance between the damping seat post and the presser bar damping rod as well as between the pressing rod and the presser foot arm in the lifting and falling processes of the presser foot arm and the presser bar of the presser bar mechanism, the sensitivity of the pressure foot arm and the pressure rod in lifting and falling can be greatly improved, and the effects of stable needle pitch and beautiful stitch can be realized.

Description

Hemming machine pressure bar mechanism and hemming machine
Technical Field
The invention relates to clothing sewing equipment, in particular to a overedger press rod mechanism and an overedger with the overedger press rod mechanism.
Background
At present, various types of sewing machines are provided with a presser bar mechanism, such as: the invention discloses a moving induction type mounting device for a presser foot arm of an industrial overedger, which is disclosed in the Chinese patent application specification with the application number of 201410321417.8. Meanwhile, the structure of the pressing rod mechanism in the prior art is shown in fig. 1, which includes a pressing rod 200, a pressing rod damping block 300, and a pressing rod spring (not shown in the figure) which are matched with the pressing rod arm 100; the lower end of the pressure lever 200 is provided with a round blind hole with a smaller diameter and a round hole with a larger diameter; the pressure bar damping block 300 is installed in a circular hole at the lower end of the pressure bar 200, a column part which extends upwards and axially and is installed in a circular blind hole of the pressure bar 200 is arranged on the upper end surface of the pressure bar damping block 300, and the lower end surface of the pressure bar damping block 300 is in surface contact fit with the upper end surface of the pressure foot arm 100; the plunger spring extends in the axial direction of the plunger 200 and is installed at the upper end of the plunger 200. When the sewing machine works, the pressure rod spring applies pressure to the pressure rod 200 and acts on the presser foot arm 100 through the pressure rod damping block 300, so that pressure required by a presser foot in the presser foot assembly is provided, and the pressure rod damping block 300 is kept in close contact with the presser foot arm 100 at any time in the sewing process. However, the structure of the pressure lever with the above structure has the following defects:
because the lower end face of the pressure bar shock absorption block 300 is in surface contact fit with the upper end face of the pressure foot arm 100, the friction resistance between the pressure bar shock absorption block and the pressure foot arm is large, the pressure bar 200 is a metal bar with the diameter of 10mm, the diameter of the round blind hole is only 3mm, and the axial length of the round hole at the lower end of the pressure bar is very small, so the weight of the pressure bar is heavy, the inertia force of the pressure foot arm and the pressure bar in the lifting and falling processes is increased, the whole existing pressure bar mechanism is clumsy, the sensitivity of the pressure foot arm and the pressure bar in lifting and falling is greatly reduced, the phenomenon of uneven needle pitch often occurs when the stem fabric is sewn, the phenomenon of fabric wrinkles often occurs when the thin fabric is sewn, and the sewing performance of the whole sewing machine is greatly influenced.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a hemming machine presser bar mechanism that increases the sensitivity of the presser arm and presser bar to lift and fall.
In order to achieve the purpose, the invention provides a hemming machine press rod mechanism which comprises a press rod, a press foot arm, a press rod spring, a damping seat post and a press rod damping rod, wherein the press rod, the press foot arm and the press rod spring are mutually matched, the damping seat post is installed in the press rod, the press rod damping rod is movably installed in the press rod and is positioned between the damping seat post and the press foot arm, the press rod damping rod comprises a damping rod body part extending along the axial direction of the press rod, and a seat post connecting part and a press foot arm connecting part which are respectively arranged at two ends of the damping rod body part, the press rod spring acts on the damping seat post, so that the damping seat post is abutted against the seat post connecting part, the press foot arm connecting part is abutted against the press foot arm, and the damping seat post is in point.
Furthermore, a V-shaped fixing groove for accommodating the connecting part of the presser foot arm is formed in the upper end face of the presser foot arm, and the connecting part of the presser foot arm is in point-surface contact with the groove wall of the V-shaped fixing groove.
Preferably, the outer peripheral surfaces of the seat post connecting part and the presser foot arm connecting part of the pressure lever shock absorption rod are spherical surfaces.
Preferably, the seat post connecting part and the presser foot arm connecting part of the pressure lever shock absorption rod are both hemispherical.
Furthermore, the compression bar is tubular and is provided with a first cavity and a second cavity which extend along the axial direction of the compression bar, the shock absorption seat column is arranged in the first cavity and is in clearance fit with the first cavity, and the compression bar shock absorption rod is movably arranged in the second cavity.
Furthermore, the material of depression bar is metal, the material of shock attenuation seatpost and depression bar shock attenuation stick all is polyoxymethylene.
Preferably, the wall thickness of the pressure bar is 1 mm.
Furthermore, one end, far away from the pressure bar shock-absorbing rod, of the shock-absorbing seat post is provided with a guide part protruding in the axial direction, and the pressure bar spring is sleeved on the guide part of the shock-absorbing seat post and is abutted against the end face of the shock-absorbing seat post.
The invention also provides an overedger, wherein the overedger press rod mechanism is arranged in the overedger.
As mentioned above, the hemming machine and the press rod mechanism thereof provided by the invention have the following beneficial effects:
in this application, through shock attenuation seatpost and seatpost connecting portion, and the in-process that the point face contact between presser foot arm connecting portion and the presser foot arm can reduce depression bar mechanism greatly lifts up and descends at presser foot arm and depression bar, shock attenuation seatpost and depression bar shock attenuation stick, and the frictional resistance between depression bar shock attenuation stick and the presser foot arm, rely on current depression bar spring's elasticity, just can to a great extent promote the sensitivity that presser foot arm and depression bar lifted up and descend, thereby when sewing over the stalk surface fabric, ultra-thin surface fabric, and the high-grade surface fabric of following the smoothness, can realize that the gauge needle is stable, the pleasing to the eye effect of stitch, the sewing quality has been improved greatly.
Drawings
Fig. 1 is a schematic structural diagram of a compression bar mechanism in the prior art.
FIG. 2 is a schematic structural diagram of a pressing rod mechanism of the hemming machine in the present application.
Fig. 3 is an enlarged view of circle a of fig. 2.
Fig. 4 is a schematic structural view of fig. 2 without the pressure lever.
Fig. 5 is an enlarged view of circle B of fig. 4.
Description of the element reference numerals
1 pressure bar
2 presser foot arm
21V-shaped fixing groove
3 pressure bar spring
4 shock-absorbing seat post
41 guide part
5 pressure bar shock attenuation stick
51 damping rod body
52 seat post connecting part
53 presser foot arm connecting part
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description only and are not intended to limit the scope of the present invention, and changes or modifications of the relative relationship thereof may be made without substantial technical changes and modifications.
As shown in fig. 2 to 5, the present application provides a bar pressing mechanism of an overlock machine, which comprises a pressing bar 1 and a pressing bar arm 2 which are matched with each other, a pressing bar spring 3 extending along the axial direction of the pressing bar 1, a damping seat post 4 installed in the pressing bar 1, and a pressing bar damping bar 5 movably installed in the pressing bar 1 and located between the damping seat post 4 and the pressing bar arm 2, wherein the pressing bar arm 2 extends forwards and backwards along the moving direction of the fabric when the overlock machine is used for sewing, and the end part of the pressing bar arm 2 is provided with a pressing bar assembly; the pressure lever spring 3, the shock absorption seat post 4, the pressure lever shock absorption rod 5 and the pressure foot arm 2 are sequentially connected from top to bottom along the axial direction of the pressure lever 1. Therefore, as shown in fig. 5, the strut damper rod 5 includes a damper rod body 51 extending in the axial direction of the strut 1, and a seat post connecting part 52 and a presser foot arm connecting part 53 respectively provided at the upper and lower ends of the damper rod body 51; under a normal state, the pressure rod spring 3 acts on the upper end of the shock absorption seat post 4, an acting force which is downward along the axial direction of the pressure rod 1 is given to the shock absorption seat post 4 and the pressure rod 1 through the elastic force of the pressure rod spring 3, so that the seat post connecting part 52 at the upper end of the pressure rod shock absorption rod 5 is in close contact with and mutually abutted against the shock absorption seat post 4, and the pressure foot arm connecting part 53 at the lower end of the pressure rod shock absorption rod 5 is in tight contact with and mutually abutted against the pressure foot arm 2, and the pressure foot arm 2. In particular, the cushion column 4 and the column connecting portion 52, and the presser arm connecting portion 53 and the presser arm 2 are in point-to-surface contact (or point contact).
When the fabric is sewn, the fabric has thickness, so that the presser arm 2 and the press rod 1 are simultaneously lifted upwards or descended downwards, and further the press rod shock absorption rod 5 starts to slightly swing forwards and backwards without constraint along with the change of the fabric thickness, but because the shock absorption seat post 4 and the seat post connecting part 52 as well as the presser arm connecting part 53 and the presser arm 2 are in point-surface contact, the friction resistance between the shock absorption seat post 4 and the press rod shock absorption rod 5 as well as between the press rod shock absorption rod 5 and the presser arm 2 can be greatly reduced in the process that the presser arm 2 and the press rod 1 are simultaneously lifted upwards or descended downwards, the sensitivity of lifting and descending of the presser arm 2 and the press rod 1 can be greatly improved by depending on the elasticity of the existing press rod spring 3, and therefore, when the high-grade fabric with stalk, ultrathin fabric and smooth fabric are sewn, the effects of stable and beautiful needle pitch can be realized, greatly improving the sewing quality.
Further, the connection structure of the pressure foot arm 2 and the pressure rod shock absorption rod 5 is as follows: as shown in fig. 5, a V-shaped fixing groove 21 for accommodating the presser arm connecting portion 53 is formed in the upper end surface of the presser arm 2, the presser arm connecting portion 53 is in point-surface contact with a groove wall of the V-shaped fixing groove 21, and the V-shaped fixing groove 21 plays a role in limiting the presser arm connecting portion 53 at the lower end of the presser bar shock-absorbing rod 5, so as to provide a stable swing fulcrum for the presser bar shock-absorbing rod 5 when the presser bar shock-absorbing rod 5 swings back and forth due to a change in the thickness of the fabric during sewing, thereby improving the overall stability of the presser bar mechanism. In this embodiment, the seat post connecting portion 52 and the presser foot arm connecting portion 53 of the pressure lever shock-absorbing rod 5 are both hemispherical, the outer diameter of the seat post connecting portion 52 is larger than the outer diameter of the presser foot arm connecting portion 53, and the outer peripheral surfaces of the seat post connecting portion 52 and the presser foot arm connecting portion 53 of the pressure lever shock-absorbing rod 5 are both spherical, so that the seat post connecting portion 52 and the shock-absorbing seat post 4 are all in point contact, and the presser foot arm connecting portion 53 and the presser foot arm 2 are all in point contact, which is beneficial for the pressure lever shock-absorbing rod 5 to start slight back and forth swing along with the change of the thickness of the fabric. In addition, the opening of the upper end of the V-shaped fixing groove 21 is larger than or equal to the outer diameter of the presser arm connecting part 53, so that the V-shaped fixing groove 21 on the presser arm 2 can accommodate the presser arm connecting part 53 at the lower end of the presser bar shock absorbing rod 5.
The shock absorption seat post 4 and the pressure rod shock absorption rod 5 are arranged in the pressure rod 1, so the pressure rod 1 is preferably tubular and provided with a first cavity and a second cavity which extend along the axial direction of the pressure rod 1, the first cavity is positioned above the second cavity, the first cavity upwards penetrates through the upper end of the pressure rod 1, the second cavity downwards penetrates through the lower end of the pressure rod 1, the shock absorption seat post 4 is arranged in the first cavity and is in clearance fit with the first cavity, the pressure rod shock absorption rod 5 is movably arranged in the second cavity, and the wall thickness of the pressure rod 1 is 1 mm. The material of the pressure lever 1 is metal, preferably steel, and the material of the shock absorption seat post 4 and the pressure lever shock absorption rod 5 are polyformaldehyde, so that the weight of the pressure lever mechanism can be greatly reduced, the inertia force of the pressure foot arm 2 and the pressure lever 1 in the lifting and falling processes is greatly reduced, and the lifting and falling sensitivity of the pressure foot arm 2 and the pressure lever 1 is further improved.
Further, as shown in fig. 3, an end of the shock absorbing seat post 4 away from the pressure rod shock absorbing rod 5 is provided with an axially protruding guide portion 41, the guide portion 41 extends upwards from the upper end of the pressure rod 1, and the pressure rod spring 3 is sleeved on the guide portion 41 of the shock absorbing seat post 4 and abuts against an end face of the shock absorbing seat post 4.
The invention also provides an overedger, wherein the overedger press rod mechanism is arranged in the overedger.
In summary, in the hemming machine and the hemming machine according to the present invention, under the condition that the cost is not increased, the cushion seat post 4 and the seat post connecting portion 52, and the presser foot arm connecting portion 53 and the presser foot arm 2 are designed to be in point-surface contact, the press rod 1 made of steel is designed to be in a tubular shape with a thin tube wall, and the middle cushion seat post 4 and the middle press rod cushion bar 5 are made of polyoxymethylene materials, so that the sensitivity of the press foot arm 2 and the press rod 1 in lifting and falling is greatly improved in a manner of reducing friction force and inertia force simultaneously in the lifting and falling processes of the presser foot arm 2 and the press rod 1, the influence of the friction force and the inertia force on the press rod mechanism is reduced, the sensitive press rod mechanism, the stable needle pitch of the stalk seam, the flat sewing quality of thin materials are realized, and the sewing performance of the whole hemming machine is greatly improved.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. The utility model provides a hemming machine presser bar mechanism, includes depression bar (1) and presser foot arm (2) and depression bar spring (3) that mutually support, its characterized in that: the damping device is characterized by further comprising a damping seat post (4) arranged in the pressure rod (1) and a pressure rod damping rod (5) which is arranged in the pressure rod (1) in a swinging mode and located between the damping seat post (4) and the pressure foot arm (2), wherein the pressure rod damping rod (5) comprises a damping rod body part (51) extending along the axial direction of the pressure rod (1), and a seat post connecting part (52) and a pressure foot arm connecting part (53) which are respectively arranged at two ends of the damping rod body part (51), the pressure rod spring (3) acts on the damping seat post (4), so that the damping seat post (4) and the seat post connecting part (52) as well as the pressure foot arm connecting part (53) and the pressure foot arm (2) are abutted, and the damping seat post (4) and the seat post connecting part (52) as well as the pressure foot arm connecting part (53) and the pressure foot arm (2); the upper end surface of the presser foot arm (2) is provided with a V-shaped fixing groove (21) for accommodating a presser foot arm connecting part (53), the presser foot arm connecting part (53) is in point-surface contact with the groove wall of the V-shaped fixing groove (21), the pressure lever (1) is tubular and is provided with a first cavity and a second cavity which extend along the axial direction of the pressure lever (1), the shock absorption seat post (4) is arranged in the first cavity and is in clearance fit with the first cavity, and the pressure lever shock absorption rod (5) is arranged in the second cavity in a swinging manner; when the fabric is sewn, the compression bar damping rod (5) swings back and forth in the second cavity without constraint, and the V-shaped fixing groove (21) provides a swinging fulcrum for the pressure foot arm connecting part (53).
2. The hemming machine presser bar mechanism of claim 1, wherein: the outer peripheral surfaces of a seat post connecting part (52) and a presser foot arm connecting part (53) of the pressure lever shock absorption rod (5) are spherical surfaces.
3. The overedger presser bar mechanism of any one of claims 1 to 2, wherein: the seat post connecting part (52) and the presser foot arm connecting part (53) of the pressure lever shock absorption rod (5) are both hemispherical.
4. The hemming machine presser bar mechanism of claim 1, wherein: the material of depression bar (1) is metal, the material of shock attenuation seatpost (4) and depression bar shock attenuation stick (5) all is polyoxymethylene.
5. The overedger presser bar mechanism of claim 4, wherein: the wall thickness of the pressure lever (1) is 1 mm.
6. The hemming machine presser bar mechanism of claim 1, wherein: one end, far away from the compression bar shock-absorbing rod (5), of the shock-absorbing seat post (4) is provided with a guide part (41) protruding in the axial direction, and the compression bar spring (3) is sleeved on the guide part (41) of the shock-absorbing seat post (4) and is abutted to the end face of the shock-absorbing seat post (4).
7. An overlock machine, characterized in that: the overedger is provided with the overedger press rod mechanism of any one of claims 1 to 6.
CN201710353246.0A 2017-05-18 2017-05-18 Hemming machine pressure bar mechanism and hemming machine Active CN107217396B (en)

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CN201710353246.0A CN107217396B (en) 2017-05-18 2017-05-18 Hemming machine pressure bar mechanism and hemming machine

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Application Number Priority Date Filing Date Title
CN201710353246.0A CN107217396B (en) 2017-05-18 2017-05-18 Hemming machine pressure bar mechanism and hemming machine

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CN107217396A CN107217396A (en) 2017-09-29
CN107217396B true CN107217396B (en) 2020-04-14

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111424381B (en) * 2019-01-10 2022-02-01 杰克缝纫机股份有限公司 Pressure bar mechanism and sewing machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847101A (en) * 1973-01-02 1974-11-12 G Tolle Sewing machine having thread severing device
CN2583140Y (en) * 2002-09-29 2003-10-29 上工股份有限公司 Sewing machine floating type material pressing device
CN202107876U (en) * 2011-05-25 2012-01-11 浙江万维机械有限公司 Tuning type pressure foot pressure adjustment device
CN103966773A (en) * 2014-05-23 2014-08-06 新杰克缝纫机股份有限公司 Automatic presser foot lifting device of sewing machine
CN204039691U (en) * 2014-07-09 2014-12-24 浙江新求精缝纫机有限公司 High speed sewing machine automatic needle-foot-lifting mechanism
CN204608345U (en) * 2015-04-01 2015-09-02 汇宝科技集团有限公司 A kind of presser foot lifting device of Sewing machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1170971C (en) * 2000-05-15 2004-10-13 大和缝纫机制造株式会社 Sewing machine
CN2739213Y (en) * 2004-07-02 2005-11-09 陈茂选 Sewing machine synchronous presser foot mechanism

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3847101A (en) * 1973-01-02 1974-11-12 G Tolle Sewing machine having thread severing device
CN2583140Y (en) * 2002-09-29 2003-10-29 上工股份有限公司 Sewing machine floating type material pressing device
CN202107876U (en) * 2011-05-25 2012-01-11 浙江万维机械有限公司 Tuning type pressure foot pressure adjustment device
CN103966773A (en) * 2014-05-23 2014-08-06 新杰克缝纫机股份有限公司 Automatic presser foot lifting device of sewing machine
CN204039691U (en) * 2014-07-09 2014-12-24 浙江新求精缝纫机有限公司 High speed sewing machine automatic needle-foot-lifting mechanism
CN204608345U (en) * 2015-04-01 2015-09-02 汇宝科技集团有限公司 A kind of presser foot lifting device of Sewing machines

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Address after: 318010 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province

Patentee after: Jack Technology Co.,Ltd.

Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou

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