CN1097651C

CN1097651C - Upper thread cutter of sewing machine

Info

Publication number: CN1097651C
Application number: CN00128968A
Authority: CN
Inventors: 蔡文呈
Original assignee: GAOLIN CO Ltd
Current assignee: GAOLIN CO Ltd
Priority date: 2000-09-08
Filing date: 2000-09-08
Publication date: 2003-01-01
Anticipated expiration: 2020-09-08
Also published as: CN1342801A

Abstract

The present invention comprises a pneumatic cylinder which is driven by compressed air, and finally a movable cutter and a fixed cutter are driven to cut off an upper thread (when the upper thread is used for sewing); simultaneously, the end of the cut upper thread is clamped by elastic sheets in order to carry out next sewing operation. When the upper thread is not used for sewing, a needle thread cut by a lower thread cutting mechanism is blown away from the bottom of a pressing piece with the utilization of the compressed air via an air passage when the sewing operation is completed and the pressing piece is lifted so that the next sewing operation can be carried out. In the present invention, the pneumatic cylinder can be replaced by an electromagnetic relay which is energized for receiving and releasing a mandrel for driving the movable cutter and the fixed cutter to cut the upper thread off.

Description

The upper thread cutter of Sewing machines

The present invention relates to the thread cutting device of Sewing machines, especially in order to catch and to cut off the thread cutting device of the last cross wires of Sewing machines.

Industrial sewing machines are in order to improve sewing velocity, and for for the purpose of the convenience that increases the Sewing machines user, the thread cutting device of last cross wires special use are also arranged, shown in " shearing device of ornamental thread on the multi-branch-needle sewing machine " of No. the 71925th, TaiWan, China patent gazette.Not only volume is bigger for shearing device for this upward cross wires (going up ornamental thread), complex structure, and in the time need not using the cross wires shearing device (for example, do not use when going up cross wires) with sewing, often need establish a blowning installation again in addition being blown away (being beneficial to sewing operation next time) by needlework the end of a thread of tangent mechanism cut-out down, not only increased the difficulty of complexity and operation, and significantly improved and make and maintenance cost.Therefore, how in the use can provide a kind of thread cutting device of going up cross wires during cross wires, and can when not using cross wires, can blow away the needlework the end of a thread that is cut off by tangent mechanism down again, just become a main problem.

Order of the present invention is to provide a kind of not only can cut off cross wires, but also can blow away the last cross wires shearing device of the needlework the end of a thread that is cut off by tangent mechanism down.

Another object of the present invention is to provide a kind of simple in structure, be easy to make, last cross wires shearing device for ease of maintenaince.

A further object of the present invention is to improve upward cross wires shearing device of the prior art and blows the traditional thread binding disappearance that is changed to separate design, and when a kind of cross wires in the use is provided, can be in order to cutting off cross wires, and when not using cross wires, can blow away a kind of cross wires shearing device of going up of needlework.

The objective of the invention is to be achieved through the following technical solutions, a kind of upper thread cutter of Sewing machines is provided, it comprises: a pneumatic cylinder, and it is installed on one first installing plate, and connects at least one air hose joint and air hose, and an end is provided with one; The shaft lock of pneumatic cylinder is connected to one first contiguous block, the first contiguous block mat, one first bolt interlocking, one second contiguous block, the second contiguous block mat, one second bolt interlocking 1 the 3rd contiguous block, the rotating shaft of the 3rd contiguous block mat 1 the 3rd bolt interlocking 1 the 4th contiguous block and break-through the 4th contiguous block, the 4th contiguous block is locked on first installing plate by the 4th bolt; The lower end locking of rotating shaft has a movable blade, and the front end of movable blade is provided with a groove; The 4th contiguous block lower end is by the 5th bolt lock a dead knife and Trap shell splinter, and just can pass through for movable blade between dead knife and the Trap shell splinter; Be provided with an air duct in the 4th contiguous block, opening one end of air duct is near dead knife and Trap shell splinter, and the other end interlocking one air hose joint and the air hose of opening; And one second installing plate, by the 6th bolt first installing plate is locked on the Sewing machines.

In addition, also provide a kind of last cross wires line cutting apparatus of Sewing machines, it comprises: an electromagnetic relay, and it is fixedly arranged on one first installing plate, and an end is provided with an axle; Axle interlocking to one first contiguous block of electromagnetic relay, the first contiguous block mat, one first bolt interlocking, one second contiguous block, the second contiguous block mat, one second bolt connects one the 3rd contiguous block, the rotating shaft of the 3rd contiguous block mat 1 the 3rd bolt interlocking 1 the 4th contiguous block and break-through the 4th contiguous block, the 4th contiguous block is locked on first installing plate by the 4th bolt; The lower end locking of rotating shaft has a movable blade, and the front end of movable blade is provided with a groove; The 4th contiguous block lower end is by the 5th bolt lock a dead knife and Trap shell splinter, and just can pass through for movable blade between dead knife and the Trap shell splinter; Be provided with an air duct in the 4th contiguous block, opening one end of air duct is near dead knife and Trap shell splinter, and the other end interlocking one air hose joint and the air hose of opening; And one second installing plate, by the 6th bolt first installing plate is locked on the Sewing machines.

Advantage of the present invention is, and is simple in structure, be easy to make, for ease of maintenaince, and in the use can be in order to cutting off cross wires during cross wires, and when not using cross wires, can blow away needlework.

Describe embodiments of the invention in detail below in conjunction with accompanying drawing, so that more clearly understand the features and advantages of the present invention.

Fig. 1 is that the upper thread cutter of Sewing machines of the present invention is installed in the schematic diagram on the Sewing machines;

Fig. 2 is the stereogram of the upper thread cutter of Sewing machines of the present invention;

Fig. 3 is the exploded view of the upper thread cutter of Sewing machines of the present invention;

Fig. 4 to Fig. 9 is the continuous action schematic diagram of upper thread cutter when tangent line of Sewing machines of the present invention;

Figure 10 and Figure 11 are the side view (correspond to Fig. 8 and Fig. 9) of Sewing machines upper thread cutter of the present invention when cutting off the end of a thread;

Figure 12 to Figure 15 is the continuous action schematic diagram that the upper thread cutter of Sewing machines of the present invention blows away the end of a thread when blowing; And

Figure 16 is the exploded view of second embodiment of the upper thread cutter of Sewing machines of the present invention.

Please refer to Fig. 1 to Figure 15.

Last cross wires 24 thread cutting devices 22 of Sewing machines 20 of the present invention include a pneumatic cylinder 40, and it is installed on one first installing plate 50, and connects at least one air hose joint 46 and air hose 44, and an end is provided with one 42 (see figure 3).But it should be noted that, though the pneumatic cylinder 40 shown in Fig. 3 is provided with two air hose joints 46 and two air hose 44 (air blowings, article one, air-breathing), possibility is different but the number of this air hose joint 46 and air hose 44 relates to the structure of pneumatic cylinder, and the emphasis of non-genus this case.Axle 42 interlockings to one first contiguous block 60 of pneumatic cylinder 40, first contiguous block, 60 mats, one first bolt, 80 interlockings, one second contiguous block 62, second contiguous block, 62 mats, one second bolt, 82 interlockings 1 the 3rd contiguous block 64, rotating shaft 70, the four contiguous blocks 66 of the 3rd contiguous block 64 mats 1 the 3rd bolt 84 interlockings 1 the 4th contiguous block 66 and break-through the 4th contiguous block 66 are locked in (see figure 3) on first installing plate 50 by the 4th bolt 86.The lower end locking of rotating shaft 70 has a movable blade 30, the front end of movable blade 30 to be provided with a groove 32 (seeing Fig. 3 to Fig. 9).The 4th contiguous block 66 lower ends are by the 5th bolt 88 locking one dead knife 34 and Trap shell splinter 36, and just can supply movable blade 30 pass through (seeing Fig. 3 to Figure 11) between dead knife 34 and the Trap shell splinter 36.Be provided with an air duct 74 in the 4th contiguous block 66, opening one end of air duct 74 is near dead knife 34 and Trap shell splinter 36, and the other end interlocking one air hose joint 46 and the air hose 44 (seeing Fig. 3 and Figure 12 to Figure 15) of opening.One second installing plate 52 is locked in first installing plate 50 on the Sewing machines 20 by the 6th bolt 90 (sees Fig. 1 to Fig. 3), make that working as compressed air (is provided by the air compression motor, this air compression motor is not shown among the figure) when driving pneumatic cylinder 40 via air hose 44, axle 42 setting in motions of pneumatic cylinder 40 also drive first contiguous block 60 in regular turn, second contiguous block 62, the 3rd contiguous block 64, last rotating shaft 70 and make movable blade 30 setting in motions, movable blade 30 is stretched out and is utilized groove 32 to catch on cross wires 24, to go up cross wires 24 again retracts, utilizing dead knife 34 and Trap shell splinter 36 will go up cross wires 24 cuts off, and will go up cross wires 24 and be clamped within dead knife 34 and the Trap shell splinter 36, carry out in order to next sewing operation that (the continuous action schematic diagram of tangent line such as Fig. 4 are to shown in Figure 9; Correspond to side view such as Figure 10 and shown in Figure 11 of Fig. 8 and Fig. 9), and make when when not using cross wires 24 sewing, but when the sewing action is finished, needlework 26 on the pin 28 are cut off (being cut off by other following tangent mechanisms that are not shown in graphic), after rising signature tool 72, compressed air is blown into air duct 74 in the 4th contiguous block 66 via air hose 44, and the end of a thread of needlework 26 blown away, carry out (blowing away the continuous action schematic diagram of the end of a thread such as Figure 12) in order to next sewing operation to shown in Figure 15.

Figure 16 shows that the second embodiment of the present invention.This second embodiment and Fig. 1 only are to unique different of first embodiment shown in Figure 3 that pneumatic cylinders 40 are changed and are electromagnetic relay 41, electromagnetic relay 41 is fixedly arranged on one first installing plate 50, and has an axle 43, axle 43 interlockings to one first contiguous block 60.When switching on folding and unfolding axle 43 to electromagnetic relay 41, axle 43 setting in motions also drive first contiguous block 60 and other elements in regular turn and cut off will go up cross wires 24.Because other element among second embodiment is all identical with first embodiment, and thread cutting action also identical (as Fig. 4 to shown in Figure 15) therefore heavily not covering numbering does not one by one also heavily cover narration.

Claims

1. the upper thread cutter of a Sewing machines is characterized in that, it comprises:

One pneumatic cylinder, it is installed on one first installing plate, and connects at least one air hose joint and air hose, and an end is provided with one;

The shaft lock of pneumatic cylinder is connected to one first contiguous block, the first contiguous block mat, one first bolt interlocking, one second contiguous block, the second contiguous block mat, one second bolt interlocking 1 the 3rd contiguous block, the rotating shaft of the 3rd contiguous block mat 1 the 3rd bolt interlocking 1 the 4th contiguous block and break-through the 4th contiguous block, the 4th contiguous block is locked on first installing plate by the 4th bolt;

The lower end locking of rotating shaft has a movable blade, and the front end of movable blade is provided with a groove;

The 4th contiguous block lower end is by the 5th bolt lock a dead knife and Trap shell splinter, and just can pass through for movable blade between dead knife and the Trap shell splinter;

Be provided with an air duct in the 4th contiguous block, opening one end of air duct is near dead knife and Trap shell splinter, and the other end interlocking one air hose joint and the air hose of opening; And

One second installing plate is locked in first installing plate on the Sewing machines by the 6th bolt.

2. the last cross wires line cutting apparatus of a Sewing machines is characterized in that it comprises:

One electromagnetic relay, it is fixedly arranged on one first installing plate, and an end is provided with an axle;

Axle interlocking to one first contiguous block of electromagnetic relay, the first contiguous block mat, one first bolt interlocking, one second contiguous block, the second contiguous block mat, one second bolt connects one the 3rd contiguous block, the rotating shaft of the 3rd contiguous block mat 1 the 3rd bolt interlocking 1 the 4th contiguous block and break-through the 4th contiguous block, the 4th contiguous block is locked on first installing plate by the 4th bolt;