CN107574590B - Double-needle sewing machine - Google Patents
Double-needle sewing machine Download PDFInfo
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- CN107574590B CN107574590B CN201710947071.6A CN201710947071A CN107574590B CN 107574590 B CN107574590 B CN 107574590B CN 201710947071 A CN201710947071 A CN 201710947071A CN 107574590 B CN107574590 B CN 107574590B
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Abstract
The invention discloses a double-needle sewing machine, which comprises a clamping component (2) with the position capable of being adjusted according to the needle position and used for clamping a seam-starting thread head, a thread shifting hook component (1) with the position capable of being adjusted according to the needle position and matched with the clamping component (2) to clamp the seam-starting thread head, and a thread cutter (33) used for cutting off the seam-starting thread head. The thread pulling hook assembly and the clamping assembly in the double-needle sewing machine can adjust positions according to the needle positions of the sewing machine, hook up and clamp the sewing thread ends at different needle positions, and cut off the sewing thread ends through the thread cutter, so that the sewing thread ends of the double-needle sewing machine are cut short, and bird nests are avoided.
Description
Technical Field
The invention relates to the field of textile processing, in particular to a double-needle sewing machine.
Background
At present, in the continuous working process of the sewing machine, after one sewing work is finished, the upper thread is firstly cut off according to the requirement, and then the next step of sewing is carried out. A longer seam starting thread head is left after thread cutting, so that the upper thread is prevented from falling off from a sewing machine needle. When the sewing is performed again, long sewing thread ends can be left on the sewing material, and because the sewing machine is high in sewing speed, the residual sewing thread ends can be sewn into a bird nest shape, the attractiveness of the product is affected, and the product is usually trimmed manually.
In the prior art, a bird nest removing device and a using method of the bird nest removing device are described, wherein a device for cutting off overlong thread ends is used, the specific method is that after the sewing machine performs thread cutting, the thread ends are pulled up through a thread pulling hook and clamped by matching with a thread clamping plate, when a machine needle moves downwards, the clamped thread ends are contacted with a blade arranged at the bottom of a thread passing groove, and then the thread ends are cut off, so that the bird nest is avoided.
Therefore, how to realize the bird nest removal of the double-needle sewing machine is a technical problem to be solved by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a double-needle sewing machine which comprises a clamping component and a thread shifting hook component, wherein the clamping component is used for clamping a seam starting thread head, the position of the thread shifting hook component can be adjusted according to the needle position, the thread shifting hook component is matched with the clamping component to clamp the seam starting thread head, and the thread cutting knife is used for cutting the seam starting thread head.
Preferably, the wire-pulling hook assembly comprises:
the wire-pulling connecting rod can be lifted and put down;
the transmission mechanism is connected with the wire shifting connecting rod and is used for transmitting the lifting and putting down actions of the wire shifting connecting rod;
two wire shifting hooks connected with the transmission mechanism through a connecting rod shaft and used for realizing wire shifting operation; the two wire shifting hooks can move in opposite directions along the connecting rod shaft;
the clamping assembly comprises two clamping supports which can respectively realize synchronous and equidirectional movement with the wire shifting hook.
Preferably, the thread cutting device further comprises a presser foot bottom plate used for supporting the thread cutting knife, the presser foot bottom plate is further provided with a thread guiding groove used for separating a sewing thread head from an upper thread, and the thread guiding groove extends to the position below the thread cutting knife.
Preferably, the presser foot bottom plate further comprises a seam allowance, the thread guide groove is located at the tail end of the seam allowance, and the seam allowance is further provided with a yielding groove located at the bottom of the seam allowance and used for enabling the seam starting thread head to penetrate out of the thread guide groove.
Preferably, the device further comprises a suction device for sucking the cut thread end away.
Preferably, the transmission mechanism is embodied as a four-bar linkage structure, and the four-bar linkage structure includes:
a fixed-position mounting bracket;
the first end of the driving connecting rod is hinged with the wire pulling connecting rod, and the second end of the driving connecting rod is hinged to the top end of the first connecting rod; the driving connecting rod is also provided with a middle end hinged with the mounting bracket;
the second connecting rod is hinged with the bottom end of the first connecting rod through the connecting rod shaft; the connecting rod shaft is positioned at the head end of the second connecting rod; and the tail end of the second connecting rod is hinged with the mounting bracket.
Preferably, the bending device further comprises a bending body, one side of the bending body is fixedly connected with the mounting bracket, and the other side of the bending body is connected with the slidable clamping bracket.
Preferably, the wire poking hook comprises a vertically arranged body and a hook body which is positioned at the tail end of the body and forms an included angle with the body;
the tail end of the clamping support is provided with a clamping piece which is positioned on the outer side of the clamping support and is used for being in contact with the hook body to clamp the sewing thread head.
Preferably, the end of the hook body is provided with a line hooking part, and the bottom of the line hooking part is provided with an arc transition for the suture head to slide into the line hooking part.
Preferably, the clamping support is further provided with a pressure adjusting device for adjusting the clamping force of the clamping sheets.
The bird nest removing device in the prior art is only suitable for a single-needle sewing machine, a thread clamping plate of the bird nest removing device is fixedly connected with a connecting plate, and the connecting plate is fixed on a machine head, so that the position of the thread clamping plate cannot be changed; meanwhile, the draw hook is also fixed on the rotating shaft through a bolt, and the position cannot be changed; and the blade of the prior art is fixed at the bottom of the wire passing groove, and the position of the blade cannot be adjusted. And the two-needle sewing machine has different needle positions, and the position of the bird nest removing device can be flexibly and conveniently adjusted according to the different needle positions, so that the sewing thread head can be cut short, and the bird nest is avoided.
The two-needle sewing machine has different needle positions, namely the width between two machine needles is different, such as 3.2mm, 6.4mm or 9.6mm, and an operator can adjust the width between the two machine needles according to requirements.
The thread end in the prior art falls on the surface of a product when the thread shifting hook works again, so that the product is polluted. In a further scheme of the invention, the wire cutting device further comprises an air suction device close to the clamping position, and after the wire head is cut off, the wire head is sucked away through the air suction device, so that the pollution to a processed product caused by the falling of the wire head is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic illustration of a two-needle sewing machine according to one embodiment of the present invention;
FIG. 2 is a schematic structural view of the wire-pulling hook assembly shown in FIG. 1;
FIG. 3 is a schematic structural view of the wire clamping device shown in FIG. 1;
FIG. 4 is an assembly view of the wire-poking hook assembly and the clamping assembly in an embodiment;
FIG. 5 is a schematic view of a presser foot assembly of the two-needle sewing machine provided in one embodiment;
FIG. 6 is a schematic structural view of the presser foot base plate of FIG. 5;
fig. 7 is a bottom view of the footplate of fig. 5.
Detailed Description
The core of the invention is to provide a double-needle sewing machine, which can adjust the positions of a thread shifting hook component and a clamping component according to different needle positions of the sewing machine, thereby realizing bird nest removal of the double-needle sewing machine.
So that those skilled in the art can better understand the disclosure of the present invention, a more detailed description of the present invention is provided below along with the accompanying drawings and the detailed description.
Referring to fig. 1 to 4, fig. 1 is a schematic view of a two-needle sewing machine according to an embodiment of the present invention; FIG. 2 is a schematic structural view of the wire-pulling hook assembly shown in FIG. 1; FIG. 3 is a schematic structural view of the wire clamping device shown in FIG. 1; fig. 4 is an assembly view of the wire-dialing hook assembly and the clamping assembly in the embodiment.
As shown in fig. 1, the two-needle sewing machine in this embodiment includes a thread-setting hook assembly 1, a holding assembly 2, a presser foot assembly 3, and a thread-setting electromagnet assembly 4. The electromagnet in the wire-pulling electromagnet assembly 4 is magnetic after being electrified, under the attraction of the electromagnet, the wire-pulling connecting rod 11 in the wire-pulling hook assembly 1 is lifted to move upwards, so that the wire-pulling hook 110 moves obliquely downwards to hook the wire end, the electromagnet is powered off, the wire-pulling connecting rod 11 is put down to the original position under the action of the reset spring, so that the wire-pulling hook 110 moves obliquely upwards to be matched with the clamping assembly 2 to clamp the wire end. The effect of dialling line electro-magnet subassembly 4 is that control dials line connecting rod 11, and then the operation is dialled line and is colluded 110 up-and-down motion, the realization is caught on and is had the purpose of seam end, be equipped with the connecting rod that links to each other with dialling line connecting rod 11 on dialling line electro-magnet subassembly 4, the connecting rod bottom has recess form connecting portion, dial line connecting rod 11 and connect in recess form connecting portion and can follow vertical direction and reciprocate, recess form connecting portion bottom is equipped with first stop device, a distance for injecing the line connecting rod 11 rebound of dialling. Besides the electromagnet is adopted to complete the thread hooking action, the same purpose can be achieved by adopting equipment such as a crankshaft, an air cylinder and the like.
The structure of the thread-pulling hook assembly 1, as shown in fig. 2, comprises a mounting bracket 18, wherein the mounting bracket 18 is composed of a plate-shaped connecting part and a mounting part perpendicular to the connecting part, the mounting part is mounted on the head of the sewing machine, and the following parts are connected with the mounting bracket 18 and are connected with the plate-shaped connecting part; the middle end of the driving connecting rod 14 is hinged with the upper portion of the mounting bracket 18 through the mortise pin 13, the first end of the driving connecting rod 14 is hinged with the tail end of the wire shifting connecting rod 11, and the second end of the driving connecting rod is hinged with the top end of the first connecting rod 19. The bottom end of the first connecting rod 19 is hinged to the head end of the second connecting rod 17 through a connecting rod shaft 112, the tail end of the second connecting rod 17 is hinged to the lower portion of the mounting support 18 through a connecting rod 15, the head end of the wire-pulling connecting rod 11 is connected to the wire-pulling electromagnet assembly 4, in the embodiment, the transmission mechanism is the mounting support 18, the driving connecting rod 14, the first connecting rod 19 and the second connecting rod 17 jointly form a four-connecting-rod structure, the four connecting rods are hinged to each other, the tail end of the wire-pulling connecting rod 11 is hinged to the first end of the driving connecting rod 14, a return spring is further mounted between the wire-pulling connecting rod 11 and the mounting support 18, and the return spring is used for. The thread shifting hook 110 is fixedly connected to a connecting rod shaft 112 between the first connecting rod 19 and the second connecting rod 17, and when the thread shifting hook 110 moves to the lowest end, the distance between the head of the thread shifting hook 110 and the mortise pin 13 is greater than the distance between the needle tip of the machine needle and the mortise pin 13.
The four-bar linkage structure is used as a transmission mechanism, the action of lifting and putting down the wire-pulling connecting rod 11 is transmitted to the wire-pulling hook 110, the specific process is that the wire-pulling connecting rod 11 is lifted under the attraction of an electromagnet, the first end of the wire-pulling connecting rod 11 pulls the driving connecting rod 14 to move upwards, the driving connecting rod 14 rotates around the mortise pin 13, the second end of the driving connecting rod moves downwards to push the first connecting rod 19 to move downwards, the wire-pulling hook 110 is pushed by the first connecting rod 19 on one hand, and constrained by the second connecting rod 17 on the other hand, and moves to the lower part of the needle in an inclined way under the combined action of the first end and the second end, so that the wire-pulling hook 110 completes the action of hooking the wire downwards. Besides the four-bar structure, other structures can be used as the transmission mechanism, such as a transmission rod with one end hinged to the wire-pulling connecting bar 11, the other end fixed to the wire-pulling hook 110, and the middle movably connected to the mounting bracket 18 through a limiting groove.
The wire-shifting hook assembly 1 comprises two wire-shifting hooks 110, the two wire-shifting hooks 110 are respectively used for hooking the thread ends on two needles, each wire-shifting hook 110 is composed of a body and a hook body 114 located at the tail end of the body, the wire-shifting hook 110 is gradually close to the needle inclination angle from the top end to the tail end, a wire-hooking angle is arranged between the hook body 114 and the body, the angle is usually smaller than 90 degrees, and the angle can also be set to be larger than or equal to 90 degrees according to requirements. The hook body 114 is far away from the end of the body and is the end, the end of the hook body 114 is a hook part, the bottom of the hook body 114 is a transition section between the hook part and the hook part, the tangent line of the transition section and the advancing direction of the line shifting hook 110 are acute angles, the angle is gradually reduced, the shape of the transition section is beneficial to the thread end to be drawn into the hook part, and the transition section can be set into other shapes with the same function as required. The hook wire part is provided with a V-shaped wire groove, and the shape of the wire pulling hook ensures that the wire pulling hook can hook the wire end more easily. The wire poking hook body is fixedly connected with the connecting rod shaft 112 through a hoop 115, the hoop 115 is provided with a through hole, the connecting rod shaft 112 is installed in the through hole, and in addition, the hoop 115 is also provided with an installation hole parallel to the radial direction of the through hole and used for installing the wire poking hook body; the hoop 115 is fixed on the connecting rod shaft 112 through the fastening force of a first fixing device, the fastening device in this embodiment is a first locking screw 111, when the first locking screw 111 is tightened, the hoop 115 and the connecting rod shaft 112 are fixed in position, and the thread shifting hook 110 is fixed on the hoop 115 through a second fixing device, the second fastening device in this embodiment is a second locking screw 113, the first locking screw 111 is loosened, the hoop 115 can slide along the connecting rod shaft 112, so that the thread shifting hook 110 fixed on the hoop 115 can move along the connecting rod shaft and be adjusted to a position corresponding to the needle position, wherein the position corresponding to the needle position is that the machine needle and the hook body 114 corresponding to the machine needle are located on the same vertical plane parallel to the four-bar mechanism, and when the thread shifting hook 110 moves obliquely downward, the hook body 114 can pass through the position right below the machine needle so as to hook the thread lifting head. The clamp in this embodiment is only one connection way between the link shaft 112 and the wire-pulling hook 110, and besides the clamp, other connection ways may be adopted in the present invention, for example, a connection groove is provided on the link shaft 112 for connecting the wire-pulling hook connection rod, and the connection rod is allowed to slide left and right in the connection groove.
Referring to fig. 3, the structure of the clamping assembly 2 includes a clamping bracket 21, a pressure adjusting sheet 26 and a clamping sheet 27, the pressure adjusting sheet 26 and the clamping sheet 27 are fixed on the clamping bracket 21 through a fixing device 22, the pressure adjusting sheet 26 is a rigid sheet, the clamping sheet 27 is a flexible sheet, the pressure adjusting sheet 26 is disposed above the clamping sheet 27 for maintaining the clamping force on the clamping sheet 27, the two are zigzag in the thickness direction, the bottoms of the two are fixed on the clamping bracket 21, the top is connected through bolts sequentially passing through the clamping bracket 21 and the clamping bracket 21, the adjusting nut 23 adds the clamping sheet 27, the pressure adjusting sheet 26 and the tightening nut 24, the distance between the pressure adjusting sheet 26 and the clamping bracket can be adjusted through the adjusting nut 23 and the locking nut 24, and the clamping force on the clamping sheet 27 can be adjusted. In addition to adjusting the clamping force of the clamping piece 27 by using the adjusting nut and the lock nut, the bending angle of the pressure adjusting piece 26 can be changed to change the clamping force on the clamping piece 27.
Referring to fig. 4, a connecting structure of the clamping bracket 2 and the wire poking hook assembly 1 is shown, a strip-shaped hole 28 for connection is formed in the top end of the clamping bracket 21, the clamping bracket 21 is connected with an adjusting bracket 52 through a connecting device penetrating through the strip-shaped hole 28, the adjusting bracket 52 comprises a bending body, the left side of the bending body is provided with two connecting holes which are transversely arranged, the right side of the bending body is provided with two connecting holes which are longitudinally arranged, two sides of the bending body are perpendicular to each other, the clamping bracket 21 is connected to the left side of the bending body, the connecting device generally adopts a bolt, and the width between the connecting devices is smaller than the length of the strip-shaped hole 28, so that the position of the clamping bracket 21 can be adjusted along. The right side of the bending body of the adjusting bracket 52 is connected with the mounting bracket 18 of the wire shifting hook component 1; because the right side of the bending body is connected with the mounting bracket 18, the connecting line of the transverse connecting hole at the left side of the bending body is vertical to the right side of the bending body, and the strip-shaped hole 28 is matched with the transverse connecting hole, the mounting position of the strip-shaped hole 28 is vertical to the mounting bracket 18, and because the connecting rod shaft 112 is also vertical to the mounting bracket 18, the strip-shaped hole 28 is parallel to the connecting rod shaft 112, and the strip-shaped hole 28 is parallel to the connecting rod shaft 112, so that the clamping component 2 and the wire poking hook component 1 can move in parallel and can be matched with each. The mounting bracket 18 and the adjusting bracket 52 are further connected with a second limiting device 53, the second limiting device is substantially triangular, one side of the second limiting device is provided with a longitudinal connecting groove, the bottom edge of the second limiting device is matched with the second connecting rod 17 to limit the upward movement distance of the second connecting rod 17, further the upward displacement of the wire poking hook 110 is limited, and the shape of the second limiting device 53 is not limited to triangular, but can also be circular, rectangular and other shapes. The connecting device penetrates through the connecting hole in the right side of the bending body, the connecting groove of the second limiting device 53 and the mounting support 18 to connect the connecting device, the connecting hole of the second limiting device 53 is longer than the distance between the two connecting devices, and the position of the limiting device 53 can be adjusted as required. The structure for realizing the left-right movement of the clamping assembly 2 is not limited to a strip-shaped hole, and a sliding guide rail can be adopted to connect the clamping assembly 2 and the adjusting bracket 52, the clamping assembly 2 can slide in the guide rail, and the position of the clamping assembly 2 is fixed through a limiting device. The number of the clamping components 2 corresponding to the wire shifting hook is also two, the structures of the left clamping component 2 and the right clamping component 2 are similar, the mounting modes of the clamping components are also approximately the same as those of the wire shifting hook component 1, and the description is omitted.
In this embodiment, the thread cutting knife is arranged in the strip-shaped mounting hole below the thread passing groove, and the thread cutting knife can move along the strip-shaped mounting hole to meet the requirements of different needle positions. Of course, the thread cutting knife and the thread passing groove can also adopt other installation modes as long as the requirement of adjusting the position of the thread cutting knife can be met.
The working process of the double-needle sewing machine provided by the invention comprises the steps of firstly adjusting a needle to a required needle position, then loosening a hoop 115 in the thread shifting hook component 1 and a bolt for fixing the clamping bracket 21, adjusting the thread shifting hook 110 and the clamping device 2 to proper positions, then fixing the thread shifting hook 110 and the clamping device, and starting sewing operation after properly adjusting the position of the thread cutter according to requirements. When the double-needle sewing machine finishes one thread cutting operation, the electric control system communicates the thread shifting electromagnet assembly 4 with the circuit, the thread shifting electromagnet assembly 4 is electrified to attract the thread shifting connecting rod 11 to move upwards, and then the thread shifting hook 110 moves downwards obliquely to hook a sewing thread end; when the thread shifting electromagnet assembly 4 is powered off, the thread shifting connecting rod 11 is pulled back to the original position under the action of the reset spring, so that the thread shifting hook 110 moves obliquely upwards and is matched with the clamping piece 27 to clamp the sewing thread end; when the sewing machine starts sewing again, the machine needle descends, a V-shaped seam starting head and the upper thread are arranged, the seam starting head enters the thread passing groove, the seam starting head is contacted with the thread passing groove along with downward movement of the machine needle, the tension on a contact point is continuously increased, the seam starting head is finally cut off, a time interval can be preset by a user, after the time interval, the thread shifting electromagnet assembly 4 is disconnected with a circuit by the electric control system, of course, the user can also install a sensor on the first limiting device, when the sensor detects that the thread shifting connecting rod 11 is contacted with the first limiting device, a signal is sent to the electric control system, and the electric control system receives the signal sent by the sensor and then disconnects the thread shifting electromagnet assembly 4 from the circuit.
The double-needle sewing machine provided by the invention can be well matched with the double-needle sewing machine for use, the position of the clamping device can be adjusted according to different needle positions of the double-needle sewing machine, the sewing thread ends on two machine needles can be guaranteed to be cut short, and further a bird nest structure is prevented from appearing on a product of the double-needle sewing machine.
In the above embodiment, the position of the thread cutting knife needs to be properly adjusted when the needle position is changed, and the operation is complicated.
Referring to fig. 5 to 7, fig. 5 is a schematic view of a presser foot assembly of a two-needle sewing machine according to an embodiment of the present invention, fig. 6 is a schematic view of a structure of a presser foot plate in fig. 5, and fig. 7 is a bottom view of the presser foot plate in fig. 5.
Referring to fig. 5, the presser foot assembly 3 includes a presser foot plate 31, a thread cutter pressing plate 32, a thread cutter 33, a presser foot base plate 34 and a guide pin 35, the presser foot plate 31 and the presser foot base plate 34 are connected by the guide pin 35, a thread cutter mounting groove is provided in the center of the presser foot base plate 34, the thread cutter 33 and the thread cutter pressing plate 32 are mounted in the mounting groove, the thread cutter pressing plate 32 functions to increase the pressing force applied to the thread cutter 33, and the thread cutter pressing plate 32 may not be used in some cases.
Referring to fig. 6, the presser foot base plate 34 is provided with two strip-shaped rabbets 38 extending from the top end to the middle portion of the presser foot base plate 34, the blade of the thread cutter 33 faces the rabbets, the bottom end of each rabbet is provided with a thread guiding groove 36, the thread guiding grooves 36 extend to the lower portion of the thread cutter 33, even if the blade of the thread cutter 33 covers the upper portion of the thread guiding groove 36, the width of the blade is smaller than the rabbets and forms a certain angle with the rabbets, a convex portion is formed between the thread guiding groove 36 and the rabbets. When the sewing machine starts sewing again, the starting sewing thread head is brought into the seam allowance, the starting sewing thread descends along with the machine needle, the starting sewing thread head enters the thread guide groove, and the starting sewing thread head and the upper thread are separated by the convex part; in the descending process of the needle, the seam starting thread head is contacted with the thread cutting knife 33, the tension of the contact part is continuously increased, and finally the thread head is cut off through the thread cutting knife 33. Referring to fig. 7, in order to prevent the starting sewing thread from being pressed by the protruding part of the edge of the wire guide groove, a relief groove 37 is arranged at the bottom of the presser foot of the protruding part in the thickness direction, and a certain gap is left between the protruding part and the sewing material, so that the starting sewing thread is prevented from being pressed by the presser foot bottom plate 35.
In the embodiment, the thread cutting knife 33 is located in the presser foot assembly 3, and the presser foot assembly 3 can adapt to different needle positions of the machine needle, so that the thread cutting operation can be completed by the thread cutting knife 33 in the presser foot assembly 3 when the needle position is changed, thereby avoiding the adjustment of the position of the thread cutting knife 33.
In the above embodiment, the cut thread pulling head is still clamped between the thread pulling hook device 1 and the clamping device 2, when the thread pulling hook device 1 hooks the thread again, the thread pulling head which is clamped originally falls onto the surface of the product which is being processed, and the thread pulling head needs to be manually arranged after the processing is completed.
In order to avoid the pollution of the cut thread end to the product, an air suction device can be additionally arranged on the fixing screw 22 of the clamping device 2 in the invention, a suction nozzle 25 of the air suction device is provided with an installation plate, the installation plate is arranged on the clamping bracket 21 through the fixing screw 22, an air suction opening of the suction nozzle 25 is aligned with the clamping sheet 27, and the other end of the suction nozzle is provided with air suction equipment such as a small air pump and is connected with the thread end collecting device.
After the thread trimming is completed, the thread cut by the thread cutter 33 is still clamped between the thread-pulling hook 110 and the clamping piece 27. The electric control system connects the wire-shifting electromagnet assembly 4 with the circuit and simultaneously sends a starting signal to the air suction device, and the air suction device starts to suck air; the thread pulling hook 110 moves downwards, the thread end originally clamped between the thread pulling hook 110 and the clamping piece 27 is loosened, and the loosened thread end is sucked into the thread end recovery device through the suction nozzle 25 by the air suction device; when the electric control system disconnects the wire-shifting electromagnet assembly 4 from the circuit, a stop signal is sent to the air suction device, and the air suction device stops air suction. The start and stop of the air suction device can be synchronous with the thread shifting electromagnet assembly 4, and can also be started and stopped at preset time intervals between actions of the thread shifting electromagnet assembly 4 or after the actions, so long as the thread shifting hook 110 is ensured to descend to loosen the thread lifting head and the thread lifting head can be sucked away in time; the thread trimming device can also be set as required, when the sewing machine performs thread trimming action, the air suction device is not started, and after the thread trimming action is completed, the electric control system controls the thread shifting electromagnet assembly 4 and the air suction device to complete one thread suction action; or when the thread trimming head is cut every time, the air suction device also performs air suction operation once, and the thread pulling head remained between the thread pulling hook 110 and the clamping piece 27 after the last thread trimming head operation is sucked away.
The device that induced drafts in this embodiment can retrieve the end of a thread that cuts, avoids the end of a thread to fall on the product surface, need not the manual work and handles the end of a thread.
In the present specification, the terms "upper", "lower", "front", "rear", "head", "end", and the like are used only for convenience of describing the shape and position of the structure, and are not necessarily the installation position thereof, and changes in the relative position between the structures without changing the essential contents of the technical solution also belong to the protection scope of the present invention.
The present invention provides a two-needle sewing machine, which is described in detail above, and the principle and the implementation paradigm of the present invention are explained by using the specific embodiments, and the description of the embodiments is only used to help understand the method and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A double-needle sewing machine is characterized by comprising a clamping component (2) with the position capable of being adjusted according to the needle position and used for clamping a seam-rising thread end, a thread shifting hook component (1) with the position capable of being adjusted according to the needle position and matched with the clamping component (2) to clamp the seam-rising thread end, and a thread cutter (33) used for cutting off the seam-rising thread end;
the wire poking hook component (1) comprises:
a wire-pulling connecting rod (11) which can be lifted and put down;
the transmission mechanism is connected with the wire poking connecting rod (11) and is used for transmitting the lifting and lowering actions of the wire poking connecting rod (11);
two wire shifting hooks (110) which are connected with the transmission mechanism through a connecting rod shaft (112) and are used for realizing wire shifting operation; the two wire shifting hooks (110) can move on the connecting rod shaft in opposite directions along the connecting rod shaft (112);
the clamping assembly (2) comprises two clamping supports (21) which can respectively realize synchronous and equidirectional movement with the wire poking hook (110);
the transfer mechanism specifically is a four-bar linkage structure, the four-bar linkage structure includes:
a fixed mounting bracket (18);
a driving connecting rod (14) with a first end hinged with the wire pulling connecting rod (11), wherein a second end of the driving connecting rod (14) is hinged with the top end of a first connecting rod (19); the driving connecting rod (14) is also provided with a middle end hinged with the mounting bracket (18);
a second connecting rod (17) hinged with the bottom end of the first connecting rod (19) through the connecting rod shaft (112); the connecting rod shaft (112) is positioned at the head end of the second connecting rod (17); the tail end of the second connecting rod (17) is hinged with the mounting bracket (18);
the clamping device is characterized by further comprising an adjusting support (52), wherein the adjusting support (52) comprises a bending body, one side of the bending body is fixedly connected with the mounting support (18), and the other side of the bending body is connected with the slidable clamping support (21).
2. A two-needle sewing machine according to claim 1, further comprising a presser foot base plate (34) for supporting the cutting blade (33), the presser foot base plate (34) being further provided with a thread guide groove (36) for separating a sewing thread head from an upper thread, the thread guide groove (36) extending to below the cutting blade (33).
3. A two-needle sewing machine according to claim 2, wherein the presser foot base plate (34) further comprises a spigot, the thread guide groove (36) being located at a distal end of the spigot, the spigot being further provided with a relief groove (37) located at a bottom of the spigot for enabling a sewing thread end to pass out of the thread guide groove (36).
4. A two-needle sewing machine according to any one of claims 1 to 3, further comprising a suction device for sucking away the cut thread take-off thread.
5. A two-needle sewing machine according to any one of claims 1 to 3, wherein the thread take-up hook (110) comprises a vertically arranged body and a hook body (114) located at the end of the body and arranged at an angle to the body;
the tail end of the clamping support (21) is provided with a clamping piece (27) which is positioned on the outer side of the clamping support (21) and is used for being in contact with the hook body (114) to clamp the sewing thread head.
6. Two-needle sewing machine according to claim 5,
the tail end of the hook body (114) is provided with a line hooking part, and the bottom of the line hooking part is provided with an arc transition for a suture head to slide into the line hooking part.
7. A two-needle sewing machine according to claim 5, wherein the holding bracket (21) is further provided with a pressure adjusting device for adjusting the holding force of the holding piece (27).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947071.6A CN107574590B (en) | 2017-10-12 | 2017-10-12 | Double-needle sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710947071.6A CN107574590B (en) | 2017-10-12 | 2017-10-12 | Double-needle sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107574590A CN107574590A (en) | 2018-01-12 |
| CN107574590B true CN107574590B (en) | 2020-06-12 |
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| CN108251987A (en) * | 2018-04-23 | 2018-07-06 | 浙江美机缝纫机有限公司 | Sewing machine removes Bird's Nest device |
| CN110144680B (en) * | 2019-06-21 | 2024-03-22 | 英商马田纺织品(中国-中山)有限公司 | Be used for beating broken needle protection integrated control device of jujube car |
| CN110965220B (en) * | 2019-12-12 | 2021-04-27 | 东莞理工学院 | Thread take-up mechanism of industrial sewing machine |
| CN111235773B (en) * | 2020-03-23 | 2021-12-21 | 浙江杰克智能缝制科技有限公司 | Sewing machine and upper thread tension adjusting and bird nest reducing device thereof |
| CN113604984B (en) * | 2021-07-29 | 2022-04-01 | 河北奔发制衣有限公司 | Chain double-needle linking machine |
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Address after: 318000 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 Patentee before: JACK SEWING MACHINE Co.,Ltd. |