CN105803700A - Sewing machine - Google Patents
Sewing machine Download PDFInfo
- Publication number
- CN105803700A CN105803700A CN201610375850.9A CN201610375850A CN105803700A CN 105803700 A CN105803700 A CN 105803700A CN 201610375850 A CN201610375850 A CN 201610375850A CN 105803700 A CN105803700 A CN 105803700A
- Authority
- CN
- China
- Prior art keywords
- needle plate
- fabric
- arm
- frame
- needle
- 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
- D05B29/00—Pressers; Presser feet
- D05B29/06—Presser feet
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B55/00—Needle holders; Needle bars
- D05B55/06—Needle guides; Needle protectors
-
- 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.The sewing machine comprises a frame, a base and a free arm, wherein the frame comprises a longitudinal rod and a frame arm extending from one side of the longitudinal rod, and the free arm is a large rectangular pipe extending out of the base protrudingly.A needle plate is fixed on the upper surface of the free arm and comprises a needle gap, an opening and a plurality of feeding toothed grooves, wherein the needle gap extends transversely, the feeding toothed grooves extend vertically, and the opening serves as a bobbin.The frame arm extends downwards to form a press rod, and a presser foot is connected to the press rod and applies set pressure from top to bottom to a fabric disposed on a supporting surface of the needle plate.An upper transmission mechanism is arranged on the frame arm of the frame and enables a needle and thread rod to move to a fixed position of a needle and thread, and the needle and thread passes through the fabric and the gap of the needle plate.
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: a kind of sewing machine, and 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 arranges multiple square projection away from interval, pin mouth neighboring area, and the length of side of described projection is 1-2mm, and thickness is 0.04-0.07mm；Distance between adjacent two projections is between 1.5-3.5mm；
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.
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.
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 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, 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. 6, shown in 7, 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 fixed position of needlework 14, 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.
Consult shown in Fig. 3,4,5,6, have multiple square projection 16 at the supporting surface 6b of described needle plate 6 uniformly at intervals away from pin mouth neighboring area.The described length of side of protruding 16 is 1.5mm, and height is 0.05mm, and between adjacent two projections 16 on described needle plate 6, the spacing of horizontal and vertical is 2.5mm.The described top rounding off of each protruding 16.
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%.
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.
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, described in be provided with the supporting surface 6b upper surface of protruding 16 and cover whole coating 17, 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.Therefore, the effect that fabric advances and fabric manipulates is more preferably.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..
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, for instance triangle, circular or semicircle etc..
The described top view of protruding 16 is square structure in the above-described embodiment, and each length of side of protruding 16 is between 1-2mm, when the described length of side of protruding 16 less than 1mm time, its contact area is too little, frictional resistance increase.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 thickness of protruding 16 is between 0.04-0.07mm.If described thickness 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 thickness 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.
Consult Fig. 6, shown in 7, in this embodiment, described protruding 16 are not distributed in the pin mouth neighboring area 6a of supporting surface 6b, and pin mouth neighboring area 6a is rough surface.Described pin mouth neighboring area 6a is ground impact and forms a rough surface, and the coefficient of friction of described rough surface portion (i.e. pin mouth neighboring area 6a) is more than the supporting surface 6b skin-friction coefficient away from pin mouth neighboring area.
The area of described pin mouth neighboring area 6a is corresponding with the lower surface 9a of presser feet 9, and the lower surface of described presser feet 9 and the upper surface of fabric 7a contact with each other.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 cloth of the lower surface 9a 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.Other regions of supporting surface 6b are smooth and set well-regulated square protruding 16.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 contact projection 16 upper surface, 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.
In this embodiment, described supporting surface 6b except pin mouth neighboring area 6a part process for treating surface all can be adopted to cover lid layer coating.Described coating is the ptfe composite (PTFE) containing nickel phosphorus compound, described coating 17 is not limited to adopt 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 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 arranges multiple square projection away from interval, pin mouth neighboring area, and the length of side of described projection is 1-2mm, and thickness is 0.04-0.07mm；Distance between adjacent two projections is between 1.5-3.5mm；
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375850.9A CN105803700A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610375850.9A CN105803700A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105803700A true CN105803700A (en) | 2016-07-27 |
Family
ID=56428022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610375850.9A Pending CN105803700A (en) | 2016-05-31 | 2016-05-31 | Sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105803700A (en) |
-
2016
- 2016-05-31 CN CN201610375850.9A patent/CN105803700A/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: 20160727 |