CN201411549Y

CN201411549Y - Thread-slippage preventing device for sewing machine

Info

Publication number: CN201411549Y
Application number: CN2009200963899U
Authority: CN
Inventors: 谢佳成
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-20
Filing date: 2009-04-20
Publication date: 2010-02-24
Anticipated expiration: 2019-04-20

Abstract

The utility model provides a thread-slippage preventing device for a sewing machine, which comprises a cutting plate arranged inside the sewing machine, and a hook plate is arranged in a sliding manner on the cutting plate. Before the sewing of the sewing machine using a plurality of needles simultaneously ends, when the bottom thread guiding needle pulls the bottom thread of the sewing machine out of the stitches formed by sewing threads positioned at the stitching points in the same row, the hook plate hooks the bottom thread and pulls the bottom thread outwards; and when the sewing machineperforms the second-to-last-stage stitching and the last-stage stitching, the hook plate continues pulling the bottom thread towards the cutting plate before crossing with the cutting plate so as to cut off the bottom thread, so that during the second-to-last-stage stitching, the bottom thread can be bound by the sewing threads and cut off so as to form knots. The utility model can avoid the thread-slippage phenomenon due to the absence of knots between the sewing threads and the bottom thread.

Description

Sewing machines prevent wire-off device

Technical field

The utility model relates to a kind of Sewing machines, relates in particular to a kind of wire-off device that prevents of Sewing machines.

Background technology

The sewing mode of present Sewing machines, flat sewing mode as shown in figure 11, be to make its bottom line 2 with the direction shown in the arrow, penetrate suture L1, the L2 of the following pin mark that is arranged in same column two suture needles, and fettered by this suture L1, L2, make this bottom line 2 continue to be wound in outside suture L2, the L1 of next pin mark down with zigzag path, to last pin, suture L1, L2 that each suture needle is drawn and bottom line 2 are cut off again in work.

But above-mentioned sewing mode, this bottom line 2 constitutes stable knotting state with suture L1, the L2 of each time pin mark, when bottom line 2 is stripped to as shown in figure 11 state, this bottom line 2 just is the slip-knot state with suture L1, the L2 of each time pin mark, this moment is if outwards pull the truncated end of this bottom line 2 with external force F, then this bottom line 2 just can cause the phenomenon of off-line because of external force breaks away from the suture L1 of each time pin mark, the constraint of L2.

So, in the present Sewing machines equipment, above-mentioned in order to solve " off-line " problem, civilian dress is equipped with off-line preventer, this off-line preventer, as shown in figure 12, contain and collude plate 5, can bottom line 6 be passed in bottom line guid needle 3 and be positioned at the A of pin place under the same column, the suture L1 of B, after among the L2, it is caught on and elongates, and make Sewing machines carry out the sewing of last two pins again, and then by a break wire device 4 each suture L1 with last pin, L2, bottom line 6 and aforementionedly cuts off in the lump through colluding the bottom line 6 that plate 5 elongates makes the second pin place of bottom line 6 before the sewing end of a period, can with the following pin A of place that is passed, the suture L1 of B, L2 forms the knotting state, when external force is pullled the truncated end 6a (shown in Figure 12 imaginary line) of this bottom line 6, just this bottom line 6 can't break away from this time pin A of place, B suture L1, the constraint of L2 is in case the anti-avulsion line.

Yet, as shown in figure 12, bottom line 6 is given earlier tick when colluding plate 5, until sewing at the end, relend broken string mechanism 4 in the lump with the suture L1 of the bottom line ticked 6 with last pin, L2 and bottom line 6 cut off in the lump, because the bottom line of being ticked 6 is made the best use of the advantages, be subject to vibrations, air-flow and waving, usually make broken string mechanism 4, can not at the end very positively be cut off in each sewing work, when cutting off this when colluding the bottom line 6 that plate 5 caught on, just can cause whole section suture L1,6 states that form no any knotting point of L2 and bottom line as state shown in Figure 11, and can produce the off-line phenomenon.

The utility model content

Technical problem underlying to be solved in the utility model is, overcomes the above-mentioned defective that prior art exists, and a kind of wire-off device that prevents of Sewing machines is provided, and it can prevent suture and bottom line because of nothing knotting point, and causes the phenomenon of off-line.

The technical scheme that its technical problem that solves the utility model adopts is:

A kind of Sewing machines prevent wire-off device, it is characterized in that, comprise a cut-out plate, be installed in the Sewing machines, on this cut-out plate, cunning is put one and is colluded plate, make Sewing machines sew simultaneously with spininess, before sewing ends, be positioned under the same column behind the suture of pin mark by ring-type that each suture forms when the bottom line of Sewing machines is passed by bottom line guid needle traction ground, collude that plate catches on and outside drawing, when sewing proceeds that last two pins are inferior sews by this, this colludes plate is to continue the bottom line that caught on towards the direction drawing of this cut-out plate, and staggered with this cut-out plate, and, make second pin of this bottom line before sewing ends with this bottom line severing, by being blocked again after the suture constraint, to form the knotting point with each suture.

Aforementioned Sewing machines prevent wire-off device, wherein on the cut-out plate, interlocking one pressing plate, and making between this pressing plate and this cut-out plate forms a chute, colludes plate along this chute slippage to allow this.

Aforementioned Sewing machines prevent wire-off device, on its center platen, interlocking one elastic pressuring plate makes the free end of this elastic pressuring plate, flexibly presses on this at ordinary times and colludes on the plate, makes this collude plate and is posted by slippage on this cut-out plate.

Aforementioned Sewing machines prevent wire-off device, wherein collude plate and stretch out direction with it, level off in the same way position with the direction of stretching out of this bottom line guid needle, be installed in this Sewing machines.

Aforementioned Sewing machines prevent wire-off device, wherein colluding plate is to stretch out direction with it, levels off to reverse position with the direction of stretching out of this bottom line guid needle, is installed in this Sewing machines.

Sewing machines that the utility model discloses prevent wire-off device, when installing, make this collude plate and stretch out direction with it, level off in the same way position with the direction of stretching out of this bottom line guid needle, be installed in the Sewing machines; Or make this collude plate stretching out direction with it, level off to reverse position with the direction of stretching out of this bottom line guid needle, be installed in the Sewing machines, the utility model does not limit its setting position, to be applicable to the installation of different type of machines Sewing machines.

The beneficial effects of the utility model are that it can prevent suture and bottom line because of nothing knotting point, and causes the phenomenon of off-line.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is cut-out plate of the present utility model, collude plate, pressing plate and the elastic pressuring plate schematic diagram after assembling.

To be the utility model stretch out direction and level off in the same way position with stretch out direction and the bottom line guid needle that colludes plate Fig. 2, is installed in the Sewing machines, and catches on the schematic perspective view of looking up of pin bottom line second from the bottom.

Fig. 3 is the face upwarding view of state shown in Figure 2.

Fig. 4 is that the utility model sewing ends, and cuts off the schematic perspective view of looking up of pin bottom line second from the bottom.

Fig. 5 is the face upwarding view of state shown in Figure 4.

Fig. 6 is the schematic perspective view of looking up after Fig. 4 borrows broken string mechanism to cut off last pin suture and bottom line.

Fig. 7 is the face upwarding view of state shown in Figure 6.

To be the utility model stretch out direction and level off to reverse position with stretch out direction and the bottom line guid needle that colludes plate Fig. 8, is installed in the Sewing machines, and catches on the face upwarding view of pin bottom line second from the bottom.

Fig. 9 is a schematic diagram of ticking bottom line from Fig. 8.

Figure 10 carries out last pin sewing from Fig. 9, and cuts off the view of pin bottom line second from the bottom.

Figure 11 is the schematic diagram of existing flat seam.

Figure 12 is the action schematic diagram of existing off-line preventer.

The number in the figure explanation:

11 cut-out plate 12 are colluded plate 13 pressing plates

14 chutes, 15 elastic pressuring plates, 2 bottom lines

2a truncated position 3 bottom line guid needles, 4 broken string mechanisms

5 collude plate 6 bottom line 6a truncated end

Pin mark A1 suture under the pin mark B under the A

B1 suture L1 suture L2 suture

The specific embodiment

See also Fig. 1 to shown in Figure 10, the utility model is the wire-off device that prevents about a kind of Sewing machines, contain a cut-out plate 11, be installed in the general existing Sewing machines (not shown in the figures), on this cut-out plate 11, cunning is put one and is colluded plate 12, make Sewing machines with spininess sew simultaneously (as flat seam), before sewing ends, when the bottom line 2 of Sewing machines by 3 tractions of bottom line guid needle pass and be positioned at pin mark A under the same column, B is by the suture A1 of ring-type that each suture forms, behind the B1, collude that plate 12 catches on and outside drawing by this, when the inferior sewing of last two pins is proceeded in sewing, this colludes plate 12 is to continue the bottom line 2 that caught on towards the direction drawing of this cut-out plate 11, and it is staggered with this cut-out plate 11, and with these bottom line of ticking 2 severings, make the bottom line 2 of this section, when second pin of sewing before ending, pass pin mark A under the same column, the suture A1 of B, B1, and by each suture A1, blocked again after the B1 constraint, with with each suture A1, B1 forms the knotting point, therefore after external force is outwards pullled by the truncated position 2a of this bottom line 2, this bottom line 2 and following pin mark A, the suture A1 of B, B1 can tie a knot because of producing, and can not cause the phenomenon of off-line.

As shown in Figure 1, on this cut-out plate 11, be interlocking one pressing plate 13, and make 11 of this pressing plate 13 and this cut-out plate, form a chute 14, collude plate 12 along these chute 14 slippages to allow this; In addition on this pressing plate 13, interlocking one elastic pressuring plate 15 makes the free end of this elastic pressuring plate 15, flexibly presses on this at ordinary times and colludes on the plate 12, makes this collude plate 12 and can stably be posted by slippage on this cut-out plate 11.

As Fig. 2, shown in Figure 3, the utility model Sewing machines prevent wire-off device, when installing, make this collude plate 12 and stretch out direction with it, level off in the same way position with the direction of stretching out of this bottom line guid needle 3, be installed in the Sewing machines; Or as Fig. 8 to shown in Figure 10, this colludes plate 12 and stretches out direction with it, levels off to reverse position with the direction of stretching out of this bottom line guid needle 3, is installed in the Sewing machines, the utility model does not limit its setting position, to be applicable to the installation of different type of machines Sewing machines.

The utility model Sewing machines prevent wire-off device, can be applicable to as Fig. 2, the flat seam of crosspointer shown in Figure 3, before ending in sewing, under two suture needles behind the pin, the suture traction can be penetrated the bottom of object to be sewn, when upwards retracting, just can form the suture A1 of ring-type in the bottom of object to be sewn, B1, this moment is in order to the bottom line pull needle 3 of the bottom line 2 of traction Sewing machines, just bottom line 2 can be penetrated the suture A1 of ring-type, among the B1, and outwards pass from suture B1, colluding plate 12, to be convenient to this moment protruding from cut-out plate 11, and catch on line segment from the outwardly directed bottom line 2 of suture B1, and pull back (as shown in Figure 3), when Sewing machines finished the sewing work of last two pins, this colludes plate 12 just can be in the process that retracts, as Fig. 4, shown in Figure 5, the bottom line 2 that is caught on is cut off, when sewing work at the end, just can be by the broken string mechanism 4 of Sewing machines, with each suture A1, B1 and bottom line 2 cut off, and form as Fig. 6, state shown in Figure 7.As Fig. 6, shown in Figure 7, owing to be positioned at following pin mark A, the B of two suture needles of pin second from the bottom, its bottom line 2 passes suture A1, the B1 of this time pin mark A, the formed ring-type of B respectively, and blocked again after suture A1, the B1 constraint by each pin, therefore this bottom line 2 can form the knotting point with the formed suture A1 of this time pin mark A, B, B1, therefore, even if passing the truncated position 2a of the outer bottom line 2 of suture B1 is pullled by external force, this bottom line 2 also can because of with the formed knotting point of this suture A1, B1, and can not be continued to pull out, avoid causing the phenomenon of off-line.

Because this colludes plate 12 sliding placing on this cut-out plate 11 when flat, when colluding plate 12 and catch on bottom line 2 and return, as scissors, the bottom line 2 that is caught on to be cut off by this cut-out plate 11, this mode can positively be cut off bottom line 2; And the off-line preventer of existing Sewing machines, as shown in figure 12, be to borrow one to collude plate 5 and bottom line 6 is given earlier tick, until sewing at the end, relend broken string mechanism 4 with the suture L1 of the bottom line ticked 6 with last pin, L2 cuts off in the lump, because the bottom line of being ticked 6 is made the best use of the advantages, be subject to vibrations, air-flow and waving, make its broken string mechanism 4, can not be cut off in each sewing work very exactly, in the time can't cutting off, just can be caused very easily making suture L1,6 of L2 and bottom lines form the state that does not have the knotting point, produce the off-line phenomenon, obvious the utility model excellence is in existing off-line preventer.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did.

Claims

A Sewing machines prevent wire-off device, it is characterized in that, comprise a cut-out plate, be installed in the Sewing machines, on this cut-out plate, slidingly put one and collude plate.
2. according to the wire-off device that prevents of the described Sewing machines of claim 1, it is characterized in that: on the described cut-out plate, interlocking one pressing plate, and make between this pressing plate and this cut-out plate, form a chute, collude plate along this chute slippage to allow this.
3. according to the wire-off device that prevents of the described Sewing machines of claim 2, it is characterized in that: on the described pressing plate, interlocking one elastic pressuring plate makes the free end of this elastic pressuring plate, flexibly presses on this at ordinary times and colludes on the plate, makes this collude plate and is posted by slippage on this cut-out plate.
4. according to the wire-off device that prevents of the described Sewing machines of claim 1, it is characterized in that: the described plate that colludes stretches out direction with it, levels off in the same way position with the direction of stretching out of this bottom line guid needle, is installed in this Sewing machines.
5. according to the wire-off device that prevents of the described Sewing machines of claim 1, it is characterized in that: the described plate that colludes is to stretch out direction with it, levels off to reverse position with the direction of stretching out of this bottom line guid needle, is installed in this Sewing machines.