CN105780332A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN105780332A CN105780332A CN201610375624.0A CN201610375624A CN105780332A CN 105780332 A CN105780332 A CN 105780332A CN 201610375624 A CN201610375624 A CN 201610375624A CN 105780332 A CN105780332 A CN 105780332A
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- CN
- China
- Prior art keywords
- needle plate
- fabric
- arm
- sewing machine
- free arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention relates to a sewing machine which comprises a machine frame.The machine frame comprises a longitudinal rod and a machine frame arm extending from one side of the longitudinal rod.The sewing machine further comprises a base and a free arm.The free arm is a large rectangular pipe protruding and extending out of the base.A needle plate is fixed to the upper surface of the free arm.The needle plate comprises a needle opening, an opening and a plurality of cloth push toothed grooves.The needle opening transversely extends.The cloth push toothed grooves vertically extend.The opening serves as a bobber.A plurality of square protrusions are arranged on the supporting face of the needle plate at intervals, wherein each protrusion has the side length of 1-2 mm and the height of 0.04-0.07 mm, and the distance between every two adjacent protrusions is 1.5-3.5 mm.When the sewing machine is used, the needle plate is installed on the upper surface of the free arm, the protrusions are regularly distributed on the supporting face, the lower surface of the fabric only makes contact with the upper surfaces of the linear protrusions with the contact area decreased, and therefore the fabric easily sticking to a smooth surface is prevented from sticking to the supporting face.
Description
Technical field
The present invention relates to stitching process field, particularly relate to a kind of sewing machine.
Background technology
The needle plate being fixed on sewing machine pedestal upper surface includes the feeding teeth groove that a supporting surface for supports fabrics, the needlework mouth for needle thread passing, confession feed dog move forward and backward up and down.By cloth presser on the support surface, feed dog is movable up and down in feeding teeth groove carries out cloth propelling movement to one presser feet.During sewing up, operator promotes fabric to assist fabric to push.
Its whole supporting surface of existing needle wire plate is all smooth surface, during operator sews up, fabric can quickly be slided.Preferably, being provided with face coat on smooth surface, face coat uses the politef complex containing nickel phosphorus compound, based on it uses metallic nickel, and ptfe composite particle.Above-described supporting surface can reduce the frictional force between supporting surface and fabric.
During needlework shuttle back and forth on fabric up and down, needlework a part for fabric is brought into pin mouth part will needlework upwards during taken out of in the lump, the upper yarn circle formed hence with the frictional force between strands and fabric will not be formed, and only may can produce a slight upper yarn circle.Therefore, grabber will be difficult to catch on yarn circle, and the situation of wire jumper occurs.
Summary of the invention
It is an object of the invention to, propose a kind of simple in construction, it is not easy to the sewing machine of wire jumper occurs.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of sewing machine, including a frame, described frame includes a vertical pole and a frame arm extended from described vertical pole side；
Described sewing machine also includes a pedestal and a free arm, and described free arm is the big rectangular tube protruded out from pedestal；One needle plate is fixed on described free arm upper surface, and described needle plate includes a pin mouth, an opening and multiple feeding teeth groove；Described pin mouth horizontal expansion, feeding teeth groove is vertically extending, and opening is as spool；
Described frame arm is downwardly extending a compressor arm, and a presser feet is connected on compressor arm, and described presser feet applies the pressure of a setting from the top down to the fabric being placed on needle plate supporting surface；
The frame arm of described frame is provided with drive mechanism, and described upper drive mechanism makes a needlework bar move to needlework fixed position, makes needle thread passing fabric, and through the pin mouth of described needle plate；One lower transmission mechanism is installed on free arm, and described lower transmission mechanism rotates a yarn circle grabber, and described yarn circle grabber catches on coil and is allowed to sew up；
One fabric feed mechanism is installed on free arm, and described fabric feed mechanism promotes feed dog, and described feed dog drives needle plate to move forward and backward up and down through the feeding teeth groove of needle plate；
On the supporting surface of described needle plate, interval arranges multiple square projection, and the length of side of described projection is 1-2mm, a height of 0.04-0.07mm；Distance between adjacent two projections is between 1.5-3.5mm.
The invention have the benefit that
Described sewing machine is when in use, needle plate is installed on free arm upper surface, and described projection is regular to be arranged on supporting surface, and the lower surface of fabric only contacts with described upper convex surface, its contact area reduces, and the fabric being so prevented from being readily adhered to smooth surface is bonded on supporting surface.
Accompanying drawing explanation
Fig. 1 is the structural representation of sewing machine of the present invention；
Fig. 2 is schematic diagram during sewing machine stitch of the present invention work；
Fig. 3 is III part partial enlarged drawing in Fig. 2；
Fig. 4 is the schematic diagram of the supporting surface projection of sewing machine needle board of the present invention；
Fig. 5 is the cross sectional view of the supporting surface projection of sewing machine needle board of the present invention；
Fig. 6 is the structural representation of sewing machine needle board of the present invention；
Fig. 7 is the sewing machine of the present invention schematic diagram in sewing process.
Detailed description of the invention
Describe the present invention below with reference to detailed description of the invention shown in the drawings.But these embodiments are not limiting as the present invention, structure, method or conversion functionally that those of ordinary skill in the art is made according to these embodiments are all contained in protection scope of the present invention.
Refering to a kind of sewing machine shown in Fig. 1, it includes that a frame 1, described frame 1 include vertical pole 2 and the frame arm 3 extended from described vertical pole 2 side.
Described sewing machine also includes pedestal 4 and a free arm 5, and described free arm 5 is the big rectangular tube protruded out from pedestal 4；One needle plate 6 is fixed on the upper surface of described free arm 5.
Refering to shown in Fig. 1,2,6, will be stitched together at upper surface two panels fabric 7a, 7b of the supporting surface 6b of described needle plate 6, described sewing machine also includes presser feet 9；Described presser feet 9 apply from the top down one setting pressure on described fabric 7a, 7b, described presser feet 9 is connected on a compressor arm 8, and described compressor arm 8 is the part that frame arm 3 downwardly extends.
Refering to shown in Fig. 6, described needle plate 6 includes that a pin mouth 10, the horizontal expansion of described pin mouth 10 are used for forming tortuous seam, and multiple feeding teeth groove 11 are vertically extending, and an opening 12 is used for replacing spool.
Refering to Fig. 1, shown in 2, it is provided with drive mechanism (not shown) on frame arm 3 top of described frame 1, described upper drive mechanism makes a needlework bar 13 move to the fixed position of needlework 14, so that needlework 14 are through fabric 7a, 7b, and through the pin mouth 10 of described needle plate 6.One lower transmission mechanism (not shown) is installed on free arm 5, rotates a yarn circle grabber, and described yarn circle grabber catches on coil and is allowed to sew up, and is formed the when that described upper coil being above described needlework 14 move on to.
Meanwhile, a fabric feed mechanism (not shown) is installed on free arm 5, for driving a feed dog 15.Described feed dog 15 moves forward and backward through the feeding teeth groove about 11 of needle plate 6, makes fabric 7a, 7b push along predetermined direction.
Refering to shown in Fig. 4, Fig. 5, Fig. 6, the supporting surface 6b of described needle plate 6 is evenly equipped with multiple square projection 16.The described length of side of protruding 16 is 1.5mm, a height of 0.05mm, and between adjacent two projections 16 on described needle plate 6, the spacing of horizontal and vertical is 2.5mm.The top rounding off of each protruding 16.
Refering to shown in Fig. 3, the upper surface of described supporting surface 6b is coated with a coating 17, and the thickness of described coating 17 is 0.01mm.Described coating 17 is the ptfe composite (PTFE) of the nickel phosphorus compound containing 25%.
When in use, described needle plate 6 is installed on the upper surface of free arm 5 to the sewing machine being provided with needle plate 6 described in above-mentioned embodiment, for producing the stitching of high friction fabric, the stitching of the most anti-skidding fabric, leather fabric or plastic fabric.Owing to described protruding 16 regular are arranged on supporting surface 6b, the lower surface of fabric 7b only with the described upper surface of protruding 16, surface area of its contact reduces.The fabric that so, it is possible to prevent being readily adhered to smooth surface is bonded on supporting surface 6b.
More have, owing between two projections 16 adjacent on described supporting surface 6b, the spacing of horizontal and vertical is 2.5mm, described fabric 7a, 7b can in any direction on make smooth advances.
In addition, the supporting surface 6b upper surface being provided with protruding 16 covers whole coating 17, and described coating 17 uses the phosphorus compound combined polytetrafluoroethylene (PTFE) of nickel containing 25% to have the function of self-lubricating.Therefore, though anti-skidding fabric or to the material that smooth surface absorbability is superpower can be more smooth on supporting surface 6b advance.Therefore, what fabric propelling and fabric manipulated is better.
In the above-described embodiment, described needle plate 6 is fixed on the free arm 5 of pedestal 4.This structure not only may be used for being provided with on the sewing machine of free arm 5, is equally applicable on other sewing machines.
In the above-described embodiment, each top view of protruding 16 is all square structure, and top is smooth.But, described protruding 16 can also have other arbitrary shapes, such as triangle, circular or semicircle etc..
The most described top view of protruding 16 is square structure, and each length of side of protruding 16 is between 1mm-2mm, and when the described length of side of protruding 16 is less than 1mm when, its contact area is the least, and frictional resistance increases.If additionally, the described length of side is more than 2mm, contact area is too big, and its frictional resistance increases equally.
Preferably, the described height of protruding 16 is between 0.04mm-0.07mm.If described height is less than 0.04mm, the lower surface of fabric 7b will contact the surface between adjacent protrusion 16, and frictional resistance will increase.If it addition, described height is equal to 0.07mm, frictional force reduces but the cost of manufacture of equipment increases.
Preferably, between described adjacent protrusion 16, distance horizontally and vertically is between 1.5-3.5mm, and described spacing depends on each length of side of protruding 16.
In the above-described embodiment, described coating 17 is covered in the surface of whole supporting surface 6b, by process of surface treatment, the ptfe composite (PTFE) of the nickel phosphorus compound containing 25% is covered in its surface.Described coating 17 is not limited to use the material of present embodiment, and existing known surface coated treatment technology is equally applicable in present embodiment, such as application polytetrafluoroethylene (PTFE) or polyamide etc..
Refering to shown in Fig. 7, during practical operation, when needlework 14 pass fabric 7a, 7b when, the upper surface of described fabric 7a contacts with the lower surface 9a of stitch 9 respectively with the lower surface of fabric 7b and supporting surface 6b contact.
Refering to shown in Fig. 2, when described feed dog 15 advances the feeding teeth groove 11 of needle plate 6 when, fabric 7a, 7b are pressed from bottom to top and carries out fabric propelling movement.
Described needle plate 6 smooth surface of prior art, can overcome the frictional force of supporting surface 6b to enter in pin mouth 10 at fabric 7a, 7b of pin mouth 10 periphery easily.By described needle plate, when needlework 14 upwards when will not form a big yarn circle, stop and wire jumper occur.
When feed dog 15 upwards hold up fabric 7a, 7b carry out cloth push when, due to weight or the effect of user's finger pressure of fabric 7a, 7b itself, the lower surface of fabric 7b contacts supporting surface 6b.The i.e. lower surface of fabric 7b only contacts protruding 19 upper surfaces of wire, therefore reduces contact area, it is possible to prevent from being bonded in the fabric that smooth surface adherence is extremely strong on supporting surface 6b.
In this embodiment, described supporting surface 6b all can use process for treating surface to cover one layer of coating.Described coating is the ptfe composite (PTFE) containing nickel phosphorus compound, described coating 17 is not limited to use the material of present embodiment, existing known surface coated treatment technology is equally applicable in present embodiment, as applied the coating of polytetrafluoroethylene (PTFE) or polyamide etc..
Sewing machine needle board described in above-mentioned embodiment, supporting surface are existing with prior art to be of entirely compared with smooth supporting surface, and it reduces with the contact surface of fabric.Therefore, it is possible to prevent from the fabric that smooth surface absorption affinity is fabulous is bonded on the supporting surface of needle plate, such as Antiskid cloth, Textileather or plastic fabric.Therefore, described needle plate can be widely used on various sewing machine.
It is to be understood that, although this specification is been described by according to embodiment, but the most each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should be using description as an entirety, technical scheme in each embodiment can also form, through appropriately combined, other embodiments that it will be appreciated by those skilled in the art that.
The a series of detailed description of those listed above is only for illustrating of the feasibility embodiment of the present invention; they also are not used to limit the scope of the invention, and all equivalent implementations or changes made without departing from skill of the present invention spirit should be included within the scope of the present invention.
Claims (1)
1. a sewing machine, it is characterised in that: including a frame, described frame includes a vertical pole and a frame arm extended from described vertical pole side；
Described sewing machine also includes a pedestal and a free arm, and described free arm is the big rectangular tube protruded out from pedestal；One needle plate is fixed on described free arm upper surface, and described needle plate includes a pin mouth, an opening and multiple feeding teeth groove；Described pin mouth horizontal expansion, feeding teeth groove is vertically extending, and opening is as spool；
Described frame arm is downwardly extending a compressor arm, and a presser feet is connected on compressor arm, and described presser feet applies the pressure of a setting from the top down to the fabric being placed on needle plate supporting surface；
The frame arm of described frame is provided with drive mechanism, and described upper drive mechanism makes a needlework bar move to the fixed position of needlework, makes needle thread passing fabric, and through the pin mouth of described needle plate；One lower transmission mechanism is installed on free arm, and described lower transmission mechanism rotates a yarn circle grabber, and described yarn circle grabber catches on coil and is allowed to sew up；
One fabric feed mechanism is installed on free arm, and described fabric feed mechanism promotes feed dog, and described feed dog drives needle plate to move forward and backward up and down through the feeding teeth groove of needle plate；
On the supporting surface of described needle plate, interval arranges multiple square projection, and the length of side of described projection is 1-2mm, a height of 0.04-0.07mm；Distance between adjacent two projections is between 1.5-3.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375624.0A CN105780332A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375624.0A CN105780332A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105780332A true CN105780332A (en) | 2016-07-20 |
Family
ID=56375455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610375624.0A Pending CN105780332A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105780332A (en) |
-
2016
- 2016-05-31 CN CN201610375624.0A patent/CN105780332A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |
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| WD01 | Invention patent application deemed withdrawn after publication |