CN105780339A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN105780339A CN105780339A CN201610375976.6A CN201610375976A CN105780339A CN 105780339 A CN105780339 A CN 105780339A CN 201610375976 A CN201610375976 A CN 201610375976A CN 105780339 A CN105780339 A CN 105780339A
- Authority
- CN
- China
- Prior art keywords
- needle plate
- fabric
- arm
- pin mouth
- supporting surface
- 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.)
- Pending
Links
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B27/00—Work-feeding means
- D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/02—Upper casings
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B73/00—Casings
- D05B73/04—Lower casings
- D05B73/12—Slides; Needle plates
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B75/00—Frames, stands, tables, or other furniture adapted to carry sewing machines
Landscapes
- 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. The machine frame arm extends downwards to form a pressing rod. A presser foot is connected to the pressing rod and exerts set pressure on a fabric put on the supporting face of the needle plate from top to bottom. Linear 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 can be prevented from sticking to the supporting face.
Description
Technical field
The present invention relates to sewing machine field, particularly relate to a kind of sewing machine.
Background technology
It is fixed on the needle plate of sewing machine pedestal upper surface and includes a supporting surface for supports fabrics, the needlework mouth for needle thread passing, the feeding teeth groove that moves forward and backward up and down for feed dog.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.In the process sewed up, operator promotes fabric to assist fabric to push.
Its whole supporting surface of existing needle wire plate is all smooth surface, in the process that operator sews up, fabric can quickly be slided.Preferably, being provided with face coat on smooth surface, face coat adopts the politef complex containing nickel phosphorus compound, and it uses based on metallic nickel, ptfe composite particle.Above-described supporting surface can reduce the frictional force between supporting surface and fabric.
When in the process that needlework shuttle back and forth up and down on fabric, a part for fabric is brought into the part of pin mouth and will be taken out of in the lump in needlework process upwards by needlework, the upper yarn circle formed hence with the frictional force between strands and fabric will not be formed, it is possible to only 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, it is proposed to 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:
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 the pin mouth of the described needle plate of traverse；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 so as 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；
The supporting surface of described needle plate is undaform away from pin mouth neighboring area, protruding for spaced multiple wire, and the width of described wire projection is 0.8-2mm, and thickness is 0.04-0.07mm, and the spacing between adjacent wire projection is 1-3mm；
Described needle plate supporting surface is rough surface in pin mouth neighboring area, and the skin-friction coefficient of described rough surface is more than the needle plate supporting surface skin-friction coefficient away from pin mouth neighboring area；
Described needle plate supporting surface upper surface is coated with a coating.
The invention have the benefit that
Described sewing machine is when in use, needle plate is installed on free arm upper surface, described wire projection is regular to be arranged on supporting surface, the lower surface of fabric only contacts with described wire 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.
Described supporting surface is rough surface in pin mouth neighboring area, even if the lower surface cloth/fabric of stitch can quickly slip over surface, when needle thread passing fabric time, stitch applies a downward pressure to pin mouth neighboring area so as to produce huge frictional force to fabric, and therefore fabric can be firmly pressed on needle plate.
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 sewing machine needle board of the present invention；
Fig. 5 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, those of ordinary skill in the art is all contained in protection scope of the present invention according to the made structure of these embodiments, method or conversion functionally.
Consulting a kind of sewing machine shown in Fig. 1, it includes a frame 1, and described frame 1 includes 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.
Consulting Fig. 1, shown in 2, 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 applies the pressure of a setting from the top down on described fabric 7a, 7b, and 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.
Consult Fig. 4, shown in 5, described needle plate 6 includes a pin mouth 10, and the horizontal expansion of described pin mouth 10 is used for forming tortuous seam, and multiple feeding teeth groove 11 are vertically extending, and an opening 12 is used for replacing spool.
Being 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 position that needlework 14 are fixing, so that needlework 14 are through fabric 7a, 7b, and the pin mouth 10 of the described needle plate 6 of traverse.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 so as to sew up, described upper coil above described needlework 14 move on in formed.
Meanwhile, a fabric feed mechanism (not shown) is installed on free arm 5, is used for driving a feed dog 15.Described feed dog 15 drives needle plate about 6 to move forward and backward through the feeding teeth groove 11 of needle plate 6, makes fabric 7a, 7b push along predetermined direction.
Consulting 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%.Described coating 17 adopts 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 both be more smooth on supporting surface 6b advance, fabric advance and fabric manipulation effect more preferably.In this 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 adopt 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..
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, for instance 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, the 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.
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, the width of described wire projection 19 is 1mm.Preferably, the width of described wire projection 19 can be between 0.8-2mm.In the above-described embodiment, the thickness of described wire projection 19 is 0.06mm, it is preferred that described thickness can be between 0.04mm-0.07mm.Spacing between adjacent wire projection 19 is preferably between 1-3mm, and the spacing between adjacent wire projection 19 depends on the width of described wire projection 19.
The width of described wire projection 19 is less than 0.8mm in the above-described embodiment, and its contact area is too little, and frictional resistance increases.If additionally, described width is more than 2mm, contact area is too big, and its frictional resistance increases equally.
Preferably, the thickness of described wire projection 19 is between 0.04mm-0.07mm.If described thickness is less than 0.04mm, the lower surface of fabric 7b will contact the surface between adjacent wire projection 19, and frictional resistance will increase.If it addition, described thickness is more than 0.07mm, frictional force reduces but the cost of manufacture of equipment increases.
Consulting Fig. 3, shown in 4, be provided with wire projection 19 at described supporting surface 6b upper surface, described wire projection 19 extends along fabric direction of propulsion F.The width of each wire projection 19 is 1mm, and thickness is 0.06mm, and the spacing between adjacent two wire projections 19 is 2mm.Each wire projection 19 has trapezoidal cross section and its top rounding off.
In this embodiment, described wire projection 19 is not distributed in the pin mouth neighboring area 6a of supporting surface 6b, and pin mouth neighboring area 6a is Rough Horizontal Plane.Described pin mouth neighboring area 6a is ground impact and forms a rough surface, and the skin-friction coefficient of described rough surface portion (pin mouth neighboring area 6a) is more than the supporting surface 6b skin-friction coefficient away from pin mouth neighboring area.
Consulting shown in Fig. 5, it is preferred that the area of described pin mouth neighboring area 6a is corresponding with the lower surface 9a of presser feet 9, the lower surface of described presser feet 9 and the upper surface of fabric 7a contact with each other.
Consulting shown in Fig. 5, in the process of practical operation, when needlework 14 are through fabric 7a, 7b time, 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.
Consulting shown in Fig. 2, when described feed dog 15 advances the feeding teeth groove 11 of needle plate 6 time, fabric 7a, 7b are pressed from bottom to top and carry out fabric propelling movement, now the lower surface of described fabric 7b does not contact with the rough surface portion of pin mouth neighboring area 6a.
In this embodiment, the pin mouth neighboring area 6a part of described supporting surface 6b is rough surface, even if the smooth surface that the lower surface 9a cloth/fabric of described stitch 9 can quickly slip over, when needlework 14 are through fabric 7a, 7b time, stitch 9 applies a downward pressure to pin mouth neighboring area 6a so as to produce huge frictional force to fabric 7a, 7b.Therefore, fabric 7b can firmly be crushed on needle plate 6.
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 time will not form a big yarn circle, it is prevented that occur wire jumper.Adopting the needle plate described in above-mentioned embodiment, the pin mouth neighboring area 6a of supporting surface 6b is rough surface, and fabric can firmly be pressed on needle plate 6.Therefore, it is possible to prevent fabric 7a, 7b from entering in pin mouth 10, and complete the process sewed up smoothly.
In the above-described embodiment, only it is formed with rough surface at the pin mouth neighboring area 6a of supporting surface 6b.Supporting surface 6b is smooth away from pin mouth neighboring area and sets well-regulated wire projection 19.Therefore, when feed dog 15 upwards hold up fabric 7a, 7b carry out cloth propelling movement time, due to the effect of the weight of fabric 7a, 7b itself or user's finger pressure, the lower surface contact supporting surface 6b smooth part of fabric 7b is except the 6a part of pin mouth neighboring area.Namely the lower surface of fabric 7b only contacts protruding 19 upper surfaces of wire, therefore reduces contact area.Therefore, the structure described in above-mentioned embodiment is still prevented from the fabric that smooth surface adherence is extremely strong is bonded on supporting surface 6b.
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 its contact surface with fabric reduces.Therefore, it is possible to prevent from being bonded on the supporting surface of needle plate to the fabric that smooth surface absorption affinity is fabulous, for instance 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 not each embodiment only comprises an independent technical scheme, this narrating mode of description is only for clarity sake, description should be made as a whole by those skilled in the art, technical scheme in each embodiment through appropriately combined, can also form 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 should be included within protection scope of the present invention without departing from the skill of the present invention equivalent implementations made of spirit or change.
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 the pin mouth of the described needle plate of traverse；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 so as 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；
The supporting surface of described needle plate is undaform away from pin mouth neighboring area, protruding for spaced multiple wire, and the width of described wire projection is 0.8-2mm, and thickness is 0.04-0.07mm, and the spacing between adjacent wire projection is 1-3mm；
Described needle plate supporting surface is rough surface in pin mouth neighboring area, and the skin-friction coefficient of described rough surface is more than the needle plate supporting surface skin-friction coefficient away from pin mouth neighboring area；
Described needle plate supporting surface upper surface is coated with a coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375976.6A CN105780339A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375976.6A CN105780339A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105780339A true CN105780339A (en) | 2016-07-20 |
Family
ID=56375426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610375976.6A Pending CN105780339A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105780339A (en) |
-
2016
- 2016-05-31 CN CN201610375976.6A patent/CN105780339A/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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160720 |