CN201738118U

CN201738118U - Lockstitch forming mechanism for novel arm-type horizontal-sending sewing machine

Info

Publication number: CN201738118U
Application number: CN2009202142764U
Authority: CN
Inventors: 罗一明; 马安
Original assignee: Shanghai Huigong No3 Sewing Machine Factory China Standard Sewing Machine Co
Current assignee: SHANGHAI BIAOZHUN HAILING SEWING MACHINERY CO., LTD.
Priority date: 2009-11-27
Filing date: 2009-11-27
Publication date: 2011-02-09
Anticipated expiration: 2019-11-27

Abstract

A lockstitch forming mechanism for a novel drum-type horizontal-sending sewing machine comprises a needle bar mechanism, a baseframe body, a needle plate arranged on the baseframe body, a shuttle support connected with a driving mechanism and a shuttle arranged on the shuttle support, wherein the needle bar mechanism comprises a needle bar, and a long needle and a short needle which are arranged at the lower end of the needle bar in a left-and-right parallel manner; two needle holes corresponding to the long needle and the short needle are formed on the needle plate; the swing direction of the shuttle is on the same plane as the long needle and the short needle; the swing track of the shuttle corresponds to the stitching tracks of the long needle and the short needle; and when being swinging, the shuttle passes through loops formed by the long needle and the short needle in sequence. The technical scheme adopted by the utility model is that the two needles and one shuttle are sequentially used to hook threads without increasing the number of shuttle, so that the upper threads are two rows of parallel stitches, and the bottom threads are crossed special stitches. The lockstitch forming mechanism has the advantages of secure sewing and attractive sewing stitches.

Description

The horizontal lock-type chain stitch of Sewing machines that send of a kind of novel cartridge type forms mechanism

Technical field

The utility model relates to the Sewing machines field, relates in particular to the horizontal lock-type chain stitch of Sewing machines that send of a kind of novel cartridge type and forms mechanism.

Background technology

Figure 1 shows that the horizontal lock-type chain stitch of Sewing machines that send of existing cartridge type forms mechanism, comprise shank 1, eedle 2, needle plate 3, shuttle 4, shuttle holder 5 and machine base body 6, its stitching forming process is:

Eedle 2 on the single needle shank 1 thrusts sewing 100, pass again to go up after needle plate 3 moves to lower dead point position, because sewing is to the friction of eedle shallow slot one latasuture line, upper thread 300 can not rise with eedle 2 smoothly, be trapped in sewing 100 belows, when eedle 2 rise 2mm-2.5mm, the upper thread 300 that is detained forms the wire loop of optimal morphology, and the shuttle holder 5 that is installed in this moment on the lower shaft is rotated, and makes that spur just in time hooks in the wire loop on the shuttle 4, shuttle 4 is rotated further, when shuttle 4 turned to next time turning point, wire loop was deviate from from the shuttle wing of shuttle 4, entangles bottom line 200, shuttle 4 counter-rotatings, stitching begins to tighten up.Shuttle 4 turns back to original position, and its intertwined point of the stitching after tightening up is positioned at sewing central authorities, and feed dog pushes sewing and finishes a needle gage.Then by the moving up and down of eedle 2, and be contained in swinging back and forth of shuttle holder 5 in the machine base body 6, finish the next one and collude the line action, stitching (shown in Fig. 2 a, 2b, 2c) circulation is formed.

This stitching is a stitching form the most frequently used on the sewing.But this structure is also inapplicable concerning firm degree requires very high large-scale thick material sewings.

The utility model content

At the problems referred to above, the utility model provides the horizontal lock-type chain stitch of Sewing machines that send of a kind of novel cartridge type to form mechanism, and it is made firmly, is suitable for large-scale thick material sewings.

To achieve these goals, the technical solution of the utility model is as follows:

The horizontal lock-type chain stitch of Sewing machines that send of a kind of novel cartridge type forms mechanism, comprise needle bar mechanism, machine base body, be arranged on needle plate, the shuttle holder that is connected with driving mechanism on the machine base body, be arranged on the shuttle in the shuttle holder, it is characterized in that, described needle bar mechanism comprises shank and is arranged on the lead aircraft pin of this shank lower end and lacks eedle, is set in parallel in the lower end of described shank about described lead aircraft pin and short eedle; Described needle plate is provided with and corresponding two pin holes of described long and short eedle; The swaying direction of described shuttle and long and short eedle are in same plane, and the swinging track of shuttle is corresponding with the thorn material track of long and short eedle, when shuttle is swung, pass successively by lead aircraft pin, short eedle and drive formed wire loop.

Lead aircraft pin and short eedle thrust sewing in the needle bar mechanism, pass the pin hole on the needle plate again, utilize the difference of height of two eedles, successively form two wire loops, it is pop-jump moving to be installed in shuttle on the lower shaft this moment, drives shuttle and rotates, and the spur of shuttle is successively hooked in two wire loops form SPECIAL STITCH.

The utility model is under the situation that does not increase shuttle for this technical scheme of taking, uses a crosspointer priority and a shuttle to collude the line action, is the parallel stitchings of two rows thereby form upper thread, and bottom line is the SPECIAL STITCH of intersection stitching.

The utility model is made firmly, and the stitching of making is attractive in appearance, is suitable for requirement and makes firm large-scale thick material sewings.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments:

Fig. 1 send the lock-type chain stitch of Sewing machines to form the schematic diagram of mechanism for existing cartridge type is horizontal.

Fig. 2 a forms the stitching schematic diagram that mechanism makes for adopting the horizontal lock-type chain stitch of Sewing machines that send of existing cartridge type.

Fig. 2 b is the bottom line stitching schematic diagram of Fig. 2 a.

Fig. 2 c is the upper thread stitching schematic diagram of Fig. 2 a.

Fig. 3 is a structural representation of the present utility model.

The stitching schematic diagram of Fig. 4 a for adopting the utility model to make.

Fig. 4 b is the bottom line stitching schematic diagram of Fig. 4 a.

Fig. 4 c is the upper thread stitching schematic diagram of Fig. 4 a.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 3, the horizontal lock-type chain stitch of Sewing machines that send of a kind of novel cartridge type forms mechanism, comprises needle bar mechanism, machine base body 6, needle plate 3, shuttle holder 5, shuttle 4.Needle plate 3 is fixedly mounted on the machine base body 6, and shuttle 4 is arranged in the shuttle holder 5, and shuttle holder 5 is connected with driving mechanism, drives its rotation by driving mechanism.Needle bar mechanism stings material up and down under the drive of transmission device.These settings are all the same with prior art, are not described in detail in this.

Lead aircraft pin 9 and short eedle 8 that needle bar mechanism comprises shank 7 and is arranged on these shank 7 lower ends, lead aircraft pin 9 and short eedle about 8 are set in parallel in the lower end of shank 7.Needle plate 3 is provided with and two pin holes (not indicating among the figure), so that corresponding with long and short eedle.The swaying direction of shuttle 4 and long and short eedle are in same plane, and when original state (as shown in Figure 3), lead aircraft pin 9 is nearer apart from the spur of shuttle 4, and short eedle 8 is far away apart from the spur of shuttle 4.

It should be noted that between shuttle and the long and short eedle and also need satisfy: the thorn material track of the swinging track of shuttle 4 and long and short eedle (9,8) is corresponding, when shuttle 4 swings, passes successively by lead aircraft pin 9, short eedle 8 and drives formed wire loop.

The course of work of present embodiment is:

Lead aircraft pin 9 and short eedle 8 thrust sewing 100 successively in the needle bar mechanism, pass the pin hole on the needle plate 3 again, in long and short eedle uphill process, successively form two wire loops, at this moment, shuttle holder 5 to counterclockwise rotating, drives shuttle 4 and rotates together under the drive of driving mechanism, the spur of shuttle 4 is successively hooked in two wire loops, deviate from from shuttle when wire loop, entangle bottom line 200 after, shuttle counter-rotating, stitching tightens up, and feed dog pushes sewing and finishes a needle gage.Then by the moving up and down of two eedles, and the swinging back and forth of shuttle holder, finish the next one and collude the line action, stitching (shown in Fig. 4 a, 4b, 4c) circulation is formed.

The utility model is under the situation that does not increase shuttle for this technical scheme of taking, uses a crosspointer priority and a shuttle to collude the line action, is the parallel stitchings of two rows thereby form upper thread 300, and bottom line 200 is the SPECIAL STITCH of intersection stitching.

More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.

Claims

1. the horizontal lock-type chain stitch of Sewing machines that send of novel cartridge type forms mechanism, comprise needle bar mechanism, machine base body, be arranged on needle plate, the shuttle holder that is connected with driving mechanism on the machine base body, be arranged on the shuttle in the shuttle holder, it is characterized in that, described needle bar mechanism comprises shank and is arranged on the lead aircraft pin of this shank lower end and lacks eedle, is set in parallel in the lower end of described shank about described lead aircraft pin and short eedle; Described needle plate is provided with and corresponding two pin holes of described long and short eedle; The swaying direction of described shuttle and long and short eedle are in same plane, and the swinging track of shuttle is corresponding with the thorn material track of long and short eedle, when shuttle is swung, pass successively by lead aircraft pin, short eedle and drive formed wire loop.