CN203795125U - Electromagnetic type thread shifting structure - Google Patents

Abstract

The utility model relates to an electromagnetic type thread shifting structure of a sewing machine. The electromagnetic type thread shifting structure comprises a machine sewing platform and a machine sewing mechanism. The machine sewing mechanism comprises an upper shell, a needle column, a driving unit and a thread shifting unit. The driving unit comprises an electromagnetic valve and a push rod. The thread shifting unit comprises a transverse rod and a thread shifting rod. The transverse rod comprises an arranging part, a rotating shaft, a penetrating hole, a guide groove and a fixing part. The thread shifting rod comprises a connecting section, a bending section and a thread hooking opening. Compared with the prior art, the electromagnetic type thread shifting structure has the following obvious advantages that the structural design is reasonable, a thread residue is drawn out of the portion below cloth in the mode that the thread shifting rod is driven by the electromagnetic valve to swing in a reciprocating mode, the condition that following machine sewing operation is affected by the fact that the thread residue remaining below the cloth is knotted in the following machine sewing operation process is avoided, accuracy is high, and the position of the cloth is not affected. The large abutting area is provided for the thread shifting rod through the guide groove, so that the thread shifting rod is not prone to being bent. The thread shifting structure is directly arranged on the upper shell through the arranging part, assembly is convenient and firm, required accuracy is low, and production is easy.

Description

Electromagnetic type is dialled line structure

Technical field

The utility model relates to a kind of line structure of dialling, and espespecially a kind of electromagnetic type is dialled line structure, belongs to sewing machine technique field.

background technology

Sewing machines, after sewing operation comes to an end, can need the wire rod of sewing cloth to cut off, and makes cloth be able to separate with Sewing machines, to complete sewing operation.General traditional Sewing machines comprises a sewing unit, a tangent line unit and a loose ends unit, in the time of sewing operation, sewing unit by a wire rod back and forth sewing on a cloth, after sewing operation comes to an end, sewing unit stops sewing, and loose ends unit pulls wire rod, make wire rod produce an enough and to spare line segment, reduce the tension force of wire rod.Tangent line unit cuts off wire rod afterwards, make cloth that sewing completes be departed from Sewing machines or the direction that changes cloth to carry out follow-up sewing operation.After wire rod is cut off by tangent line unit, wire rod has part line segment and still remains on cloth, specifically, after wire rod is cut off, can produces one through cloth and be positioned at the end of a thread below cloth, and upwards lying along the extension of cloth top from the end of a thread.If the position of user's moving cloth while carrying out follow-up sewing operation, the end of a thread that is positioned at cloth below easily intertwines with the wire rod that follow-up sewing operation is used, and may cause the Sewing machines cannot normal operation.

For head it off, then there is the Sewing machines of improvement to be provided with one group of line structure, this group of line structure comprises an electromagnet that is installed in Sewing machines top one side, plural connecting rod, and be subject to one group of line bar of those connecting rod driven rotary, the end of a thread is pulled out on cloth.Wherein dial line bar and be directly locked on pin post, because pin post is cylindrical, and small volume, if those connecting rods will be installed on pin post with dialling line bar, need higher precision, be not easy to make and assembling.In addition, those connecting rods comprise one for dial that line bar wears and interlock dial line bar rotation rotating shaft, be opened on rotating shaft for dialling the through hole and that line bar wears and be locked in a fixing locking part of dialling line bar on rotating shaft, dial line bar and wear through hole and be subject to locking part urgent.But group line bar passes through hole and exposes one end and supplies locking part urgent to be fixed on rotating shaft, and locking part is easily dialled line rod bending because revolving too tightly to make, and causes group line bar angle mistake, so that cannot dial the problem of line.

Utility model content

Technical problem to be solved in the utility model is to overcome existing above-mentioned deficiency in prior art, and a kind of easily bending of group line bar of commonly using Sewing machines that is to solve is provided, and impact is dialled the electromagnetic type of line precision problem and dialled line structure.

The utility model solves the problems of the technologies described above adopted technical scheme: a kind of electromagnetic type is dialled line structure, comprise sewing platform and sewing mechanism, described sewing platform and sewing mechanism are arranged on Sewing machines, sewing mechanism is located at sewing platform top, between sewing platform and sewing mechanism, be provided with working space, it is characterized in that: described sewing mechanism comprises upper body, pin post, driver element and group line unit, described driver element comprises electromagnetic valve and pusher rod, described group of line unit comprises cross bar and dials line bar, described cross bar comprises installing department, turning cylinder, perforation, guide channel and fixed part, described group of line bar comprises linkage section, bending segment and hook line opening.

Cross bar described in the utility model also comprises connecting rod, and described connecting rod one end is fixed on turning cylinder other end pivot joint pusher rod and is subject to pusher rod interlock and taking turning cylinder as axis swing.

Electromagnetic valve described in the utility model comprises electromagnet, driving shaft, compress ring and elastic parts, described in compress ring and elastic parts is sleeved on driving shaft

The utility model compared with prior art, there is following positive effect: reasonable in design, dial line bar by solenoid-driven, order is dialled line bar back and forth in primary importance and the second place, and then the mode by swinging back and forth of being able to detaches the end of a thread from this cloth below, while avoiding follow-up sewing operation, follow-up sewing operation can be tied a knot and affect to this end of a thread that residues in this cloth below, compared to the Sewing machines spraying by nozzle except this end of a thread, more precisely and can not affect the position of cloth.Guide channel provides dials the larger rest surface of line bar, in the time of urgent group of line bar of fixed part, dial line bar not flexible, and electromagnetic type is dialled line structure and is directly installed in upper body by installing department, easy to assembly and be directly installed on pin post compared to the thread-moving device of commonly using Sewing machines, comparatively firm and required precision is lower, more easily produces.

Brief description of the drawings

Fig. 1 is the assembling position schematic diagram that the electromagnetic type of the present embodiment is dialled line structure.

Fig. 2 is the structural representation that the electromagnetic type of the present embodiment is dialled line structure.

The electromagnetic type that Fig. 3, Fig. 4, Fig. 5 are the present embodiment is dialled group line process schematic diagram of line structure.

In figure: 100-Sewing machines, 1-sewing platform, 2-sewing mechanism, 21-upper body, 22-pin post, 3-working space, 4-driver element, 41-electromagnetic valve, 411-electromagnet, 412-driving shaft, 413-compress ring, 414-elastic parts, 42-pusher rod, 5-group line unit, 51-cross bar, 511-turning cylinder, 512-connecting rod, 513-installing department, 514-perforation, 515-guide channel, 516-fixed part, 52-group line bar, 521-linkage section, 522-bending segment, 523-hook line opening, 6-cloth, 7-wire rod, 71-the end of a thread, 72-extension.

Detailed description of the invention

Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail.

Embodiment:

Referring to Fig. 1～Fig. 2, be assembling position schematic diagram and the schematic appearance of the utility model, as shown in the figure, a kind of electromagnetic type is dialled line structure, be installed in Sewing machines 100, Sewing machines 100 comprises a sewing platform 1, is located at the sewing mechanism 2 of sewing platform 1 top, and a working space 3 of being located between sewing platform 1 and sewing mechanism 2, sewing mechanism 2 comprises a upper body 21 and and is arranged at the pin post 22 of upper body 21.Electromagnetic type is dialled line structure and is included a driver element 4 and one group of line unit 5, and driver element 4 comprises an electromagnetic valve 41 that is installed in upper body 21, and a connected electromagnetic valve 41 is subject to electromagnetic valve 41 to drive the pusher rod 42 away from electromagnetic valve 41.Dialling line unit 5 comprises one with pusher rod 42 pivot joints and is subject to pusher rod 42 interlocks and the cross bar 51 of pivotable, and one be arranged at group line bar 52 being connected with cross bar 51 in working space 3, dial the linkage section 521 that line bar 52 comprises a connection cross bar 51 and swung by cross bar 51 interlocks, one connects the bending segment 522 of linkage section 521, and the hook line opening 523 forming between bending segment 522 and linkage section 521.Specifically, electromagnetic valve 41 comprises an energising and produces afterwards the electromagnet 411 of a polarity, one driving shaft 412 that wears electromagnet 411 and be connected with pusher rod 42, one be located on driving shaft 412 and be subject to driving shaft 412 interlocks compress ring 413, and one is sheathed on two ends on driving shaft 412 respectively against compressing the elastic parts 414 of ring 413 with electromagnet 411.Cross bar 51 comprises a connection dials the turning cylinder 511 of line bar 52, and one end is fixed on that turning cylinder 511 and other end pivot joint pusher rod 42 are subject to pusher rod 42 interlocks and a connecting rod 512 taking turning cylinder 511 as axis swing.Further, cross bar 51 more comprises one and is installed in the installing department 513 wearing in upper body 21 and for turning cylinder 511, with the position of fixed bias circuit 511, one is arranged at the perforation 514 wearing for group line bar 52 on turning cylinder 511, one is axially set in guiding on turning cylinder 511 along perforation 514 dials the guide channel 515 of line bar 52 through perforation 514, and one be locked on turning cylinder 511 urgent group of line bar 52 and dial the fixed part 516 of line bar 52 displacements with restriction, dial line bar 52 by guide channel 515 guide through perforation 514 and by fixed part 516 against and urgent group of line bar 52, order is dialled line bar 52 and is fixed on turning cylinder 511, and because of guide channel 515 increase the linkage section 521 of dialling line bars 52 against area, and it is not flexible while being subject to fixed part 516 urgent to make to dial line bar 52.

Consult Fig. 3～Fig. 5, sewing platform 1 is placed for a cloth 6, pin post 22 by a wire rod 7 up and down back and forth sewing on cloth 6, when after cloth 6 sewing to paragraphs, Sewing machines 100 sees through a loose ends structure (not shown) and pulls wire rod 7 to reduce the tension force of wire rod 7, and cut off wire rod 7 by a line cutting structure (not shown) in cloth 6 belows, now wire rod 7 has one through cloth 6 and is positioned at the end of a thread 71 of cloth 6 belows, and one lies along the extension 72 of cloth 6 tops from the end of a thread 71.Dial line bar 52 and there is the primary importance of a hook line opening 523 towards extension 72, and a hook line opening 523 second place of extension 72 dorsad.As shown in Figure 3, dial line bar 52 normalities and be positioned at the second place, when producing this polarity chron after electromagnet 411 energisings, driving shaft 412 is attracted by electromagnet 411 and to electromagnet 411 displacements, now the compressing ring 413 on driving shaft 412 is subject to driving shaft 412 interlocks and upwards pushes elastic parts 414, and elastic parts 414 produces a restoring force because of compression.Pusher rod 42 is subject to driving shaft 412 interlocks and draws and lifts the connecting rod 512 of cross bar 51, make connecting rod 512 upwards swing as axle center taking turning cylinder 511, and turning cylinder 511 is subject to connecting rod 512 to swing interlock and carries out pivotable, the turning cylinder 511 further section of being connected 521 carries out an oscillating stroke to primary importance from the second place to wire rod 7.Now, the bending segment 522 of dialling line bar 52 is pushed extension 72 open and is rocked to the second place and makes hook line opening 523 towards extension 72 (as shown in Figure 4).In the time of electromagnetic valve 41 power-off, elastic parts 414 utilize restoring force will compress ring 413 downwards pushing and pressing, make driving shaft 412 interlock pusher rod 42 away from electromagnetic valve 41 to bottom offset.And connecting rod 512 is driven taking turning cylinder 511 as axle center to lower swing by pusher rod 42, make the reverse pivotable of turning cylinder 511, thereby drive linkage section 521 to carry out another oscillating stroke of an opposite direction, make bending segment 522 from primary importance involution to the second place, now extension 72 enters hook line opening 523 and stirred by bending segment 522 and make the end of a thread 71 detach cloth 6.

The utility model is driven and is dialled line bar 52 by electromagnetic valve 41, order is dialled line bar 52 back and forth in primary importance and the second place, and then the mode being able to by swinging back and forth detaches the end of a thread 71 from cloth 6 belows, while avoiding follow-up sewing operation, the end of a thread 71 that residues in cloth 6 belows can be tied a knot and affect follow-up sewing operation, compared to the Sewing machines spraying by nozzle except the end of a thread, more precisely and can not affect the position of cloth 6.Again, guide channel 515 provides dials the larger rest surface of line bar 52, in the time of 516 urgent groups of line bars 52 of fixed part, dial line bar 52 not flexible, and electromagnetic type is dialled line structure and is directly installed in upper body 21 by installing department 513, easy to assembly and be directly installed on pin post compared to the thread-moving device of commonly using Sewing machines, comparatively firm and required precision is lower, more easily produces.

Above content described in this description is only to the explanation of the utility model structure example.The utility model person of ordinary skill in the field can make various amendments or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.

Claims (3)

1. an electromagnetic type is dialled line structure, comprise sewing platform and sewing mechanism, described sewing platform and sewing mechanism are arranged on Sewing machines, sewing mechanism is located at sewing platform top, between sewing platform and sewing mechanism, be provided with working space, it is characterized in that: described sewing mechanism comprises upper body, pin post, driver element and group line unit, described driver element comprises electromagnetic valve and pusher rod, described group of line unit comprises cross bar and dials line bar, described cross bar comprises installing department, turning cylinder, perforation, guide channel and fixed part, described group of line bar comprises linkage section, bending segment and hook line opening.

2. electromagnetic type according to claim 1 is dialled line structure, it is characterized in that: described cross bar also comprises connecting rod, and described connecting rod one end is fixed on turning cylinder other end pivot joint pusher rod and is subject to pusher rod interlock and taking turning cylinder as axis swing.

3. electromagnetic type according to claim 1 is dialled line structure, it is characterized in that: described electromagnetic valve comprises electromagnet, driving shaft, compress ring and elastic parts, described in compress ring and elastic parts is sleeved on driving shaft.