CN209779187U - Thread trimming device for sewing machine and sewing machine - Google Patents

Abstract

The utility model belongs to the technical field of sewing machine, a thread trimming device and sewing machine for sewing machine is related to. The thread trimming device comprises a mounting plate, a fixed blade and a movable blade assembly, wherein the fixed blade is fixedly mounted on one side of the mounting plate, and the movable blade assembly is slidably mounted on the mounting plate and is opposite to the cutting edge of the fixed blade; a floc removing sheet is arranged below the movable knife component; the movable knife assembly comprises a movable knife rest which is slidably arranged on the mounting plate, and a movable blade which is arranged on one side of the movable knife rest close to the fixed blade; a wire clamping sheet is further arranged below the mounting plate corresponding to the fixed blade; and the two ends of the mounting plate are respectively provided with a cylinder for driving the sliding knife assembly to move. The utility model discloses have the effect of getting rid of the trimming in-process and producing the cotton fibre to prevent to produce the clearance between movable blade and the thread tension sheet, prevent to press from both sides the condition of not living the line.

Description

Thread trimming device for sewing machine and sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a thread trimming device and sewing machine for sewing machine is related to.

Background

Nowadays, most garment factories adopt automatic sewing machines to perform tailor processing. At present, an automatic sewing machine is provided with a movable blade and a fixed blade to realize thread cutting operation, however, cotton wool is easily generated in the thread cutting process, the problem that the blade is blocked after the sewing machine works for a period of time is solved, and the sewing machine cannot normally work.

disclosure of Invention

An object of the utility model is to provide a thread trimming device and sewing machine for sewing machine to prior art's not enough.

in order to achieve the above purpose, the utility model adopts the following technical scheme:

A thread cutting device for a sewing machine comprises a mounting plate, a fixed blade and a movable blade assembly, wherein the fixed blade is fixedly mounted on one side of the mounting plate, and the movable blade assembly is slidably mounted on the mounting plate and is opposite to a cutting edge of the fixed blade; and a floc removal sheet is arranged below the movable knife component.

Furthermore, the movable knife assembly comprises a movable knife rest which is slidably mounted on the mounting plate, and a movable blade which is mounted on one side, close to the fixed blade, of the movable knife rest.

Furthermore, a plurality of movable blades are arranged on the movable knife rest, and the cutting edge of each movable blade is arranged close to the corresponding movable blade.

Furthermore, remove the flocculus and install in the movable knife rest and be close to the one side of fixed blade, remove the below that the flocculus is located movable blade.

Furthermore, a wire clamping sheet is further installed below the installation plate corresponding to the fixed blade.

Furthermore, one side of the wire clamping piece, which is far away from the fixed blade, is provided with an adjusting piece for adjusting the wire clamping pressure.

Furthermore, the mounting panel both ends are equipped with the first cylinder and the second cylinder of drive slip knife tackle spare motion respectively, first cylinder and second cylinder are connected with the both ends of movable knife rest respectively.

Furthermore, a guide block for guiding the movable tool rest to move is arranged on the mounting plate, and a sliding chute for the guide block is arranged on the movable tool rest.

Furthermore, one side of the guide block, which is far away from the mounting plate, is also provided with a pressing block for limiting the movable tool rest.

A sewing machine comprises a material conveying assembly and a sewing assembly, wherein the sewing assembly comprises any one of the thread trimming devices for the sewing machine.

the utility model has the advantages that:

1. The utility model discloses be equipped with in movable blade below and remove the flocculus, when movable blade carried out shearing action next time, can clear away the cotton fibre that the last shearing produced simultaneously to prevent to produce the clearance between movable blade and the thread tension sheet, prevent to press from both sides the condition of not live the line.

2. the movable blade of the utility model is driven by the cylinder, and can realize automatic shearing;

3. meanwhile, the multiple movable blades adopted by the utility model respectively carry out shearing action aiming at each cotton thread to be sheared, so that the shearing force is more concentrated, the shearing success rate is higher, and the problem of continuous shearing is avoided;

4. The utility model discloses be equipped with the guide block of movable knife rest, can make movable knife rest slide more smoothly, avoid movable knife rest jamming.

Drawings

FIG. 1 is a schematic structural view of a thread trimming apparatus;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic structural view of a movable blade carrier;

fig. 4 is a schematic structural view of the thread tension sheet and the adjusting sheet.

The labels in the figure are: 1-mounting plate, 101-guide block, 102-press block, 103-fixing plate, 2-first cylinder, 201-first piston rod, 3-second cylinder, 301-second piston rod, 4-movable knife rest, 401-chute, 5-movable blade, 6-fixed blade, 7-deflocculant sheet, 8-thread clamping sheet, 9-regulating sheet and 10-stop block.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as fixed or detachable connections or as an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 and 2, an embodiment provides a thread cutting device for a sewing machine, which includes a mounting plate 1, a fixed blade 6 and a movable blade assembly, wherein the fixed blade 6 is fixedly mounted on one side of the mounting plate 1, and the movable blade assembly is slidably mounted on the mounting plate 1 and is opposite to a cutting edge of the fixed blade 6; and a floc removal sheet 7 is arranged below the movable knife component. In the embodiment, the fixed blade 6 is fixedly installed on one side of the mounting plate 1 through screws, so that the fixed blade 6 can be replaced after being worn, thereby saving the cost; the movable knife assembly and the fixed knife 6 are positioned on the same side of the mounting plate 1, and the movable knife assembly is opposite to the cutting edge of the fixed knife 6, so that when the movable knife assembly pushes cotton threads, the cotton threads are contacted with the cutting edge of the fixed knife 6, and the cutting is realized; the lower part of the movable knife component is provided with a floc removal sheet 7 which moves synchronously with the movable knife component, so that when the movable knife component carries out secondary shearing action, the floc removal sheet 7 can remove cotton wool generated by the last shearing action.

In an embodiment, the movable knife assembly comprises a movable knife rest 4 slidably mounted on the mounting plate 1, and a movable blade 5 mounted on a side of the movable knife rest 4 adjacent to the fixed blade 6. In the embodiment, two ends of the mounting plate 1 are respectively provided with a guide block 101, and the positions of the movable tool rests 4 corresponding to the guide blocks 101 are respectively provided with a sliding groove 401; the movable knife rest 4 slides in/out for the mounting plate 1, the guide block 101 realizes relative sliding in the sliding groove 401, and plays a guiding role in the sliding direction of the movable knife rest 4, so that the movable knife rest 4 is prevented from offsetting in the sliding process, and the problem that the movable knife rest 4 is blocked is avoided. In the embodiment, a pressing block 102 for limiting the movable tool rest 4 is further arranged on one side, away from the mounting plate 1, of the guide block 101, so that the movable tool rest 4 is prevented from tilting in the sliding process.

Referring to fig. 1 and 3, in an embodiment, the movable blade 5 is mounted on one side of the movable blade holder 4 close to the fixed blade 6, the cutting edge of the movable blade 5 is opposite to the cutting edge of the fixed blade 6, and when the movable blade 5 moves towards the fixed blade 6, the movable blade 5 slides under the fixed blade to cut off the cotton thread between the fixed blade 6 and the movable blade 5, thereby realizing the cutting action. In this embodiment, the movable knife rest 4 is provided with ten movable blades 5, which respectively perform shearing actions on different cotton threads, so that shearing force provided by the movable blades during the shearing action is more concentrated on the cotton threads, thereby realizing rapid shearing and improving shearing success rate; in an embodiment, the cutting edge of the movable blade 5 is arranged close to the fixed blade 6. The deflocculating sheet 7 is fixedly arranged on one side of the movable knife rest 4 close to the fixed blade 6, and the deflocculating sheet 7 is positioned below the movable blade 5.

In other embodiments, the number of the movable blades 5 can be set according to the needs of the sewing machine line, and can be set to other numbers such as four, six, twelve, fifteen, etc.

In the embodiment, a wire clamping piece 8 is arranged on the mounting plate 1 corresponding to the position below the fixed blade 6, and an adjusting piece 9 for adjusting the clamping force of the wire clamping piece 8 is further arranged on one side of the wire clamping piece 8 away from the fixed blade; the thread clamping sheet 8 is matched with the adjusting sheet 9 and used for clamping cotton threads and preventing thread ends from falling off after the cotton threads are cut off; one ends of the wire clamping sheet 8 and the adjusting sheet 9 are fixedly arranged on the mounting plate 1 through a connecting plate 103; the thread-clamping sheet 8 is located below the deflocculation sheet 7. When the cotton yarn clamping device is used, the clamping force on cotton yarns can be changed by adjusting the clamping force between the adjusting sheet 9 and the yarn clamping sheet 8, so that the cotton yarn clamping device is suitable for different clamping forces required by different cotton yarns.

In the embodiment, a first cylinder 2 and a second cylinder 3 for driving the sliding knife assembly to move are respectively arranged at two ends of the mounting plate 1, and the first cylinder 2 and the second cylinder 3 are respectively connected with two ends of the movable knife rest 4. In the embodiment, the first cylinder 2 is fixedly installed at one end of the installation plate 1, and one end of the first piston rod 201 far away from the first cylinder 2 is fixedly connected with one end of the movable tool rest 4; the second cylinder 3 is arranged at one end of the mounting plate 1 far away from the first cylinder 2, and one end of a second piston rod 301 far away from the second cylinder 3 is fixedly connected with one end of the movable tool rest 4 far away from the first piston rod 201; therefore, under the driving of the telescopic action of the piston rod, the sliding action of the movable tool rest 4 is realized, and further the shearing action is realized.

The two ends of the mounting plate 1 are also provided with a baffle 10 for further limiting the sliding direction of the movable knife rest 4, thereby ensuring the stability of the movable knife rest 4.

When the cutting device is used, the movable tool rest 4 is driven to move close to the mounting plate 1 and the movable blade 5 moves close to the fixed blade 6 in the contraction process of the piston rod of the air cylinder, so that the cutting action is realized; then, a piston rod of the cylinder extends out to drive the movable tool rest 4 to move towards the direction far away from the mounting plate 1, namely, the movable blade 5 is driven to be far away from the fixed blade 6, and one-time shearing action is finished; in the process that the subsequent cylinder drives the movable knife rest 4 to shrink, the cotton wool removing sheet 7 can push out the cotton wool generated by the last shearing action, the cotton wool removing effect is achieved, and the movable blade 5 and the fixed blade 6 are prevented from being clamped.

in addition, the embodiment also provides a sewing machine, which comprises a material conveying assembly and a sewing assembly, wherein the sewing assembly comprises any one of the thread cutting devices for the sewing machine, and the thread cutting device finishes the thread cutting action in the sewing process.

The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The thread trimming device for the sewing machine comprises a mounting plate (1), a fixed blade (6) and a movable blade assembly, wherein the fixed blade (6) is fixedly mounted on one side of the mounting plate (1), and the movable blade assembly is slidably mounted on the mounting plate (1) and is opposite to a cutting edge of the fixed blade (6); it is characterized in that a deflocculation sheet (7) is arranged below the movable knife component.

2. The thread trimming device for sewing machines according to claim 1, characterized in that said movable knife assembly comprises a movable knife carrier (4) mounted slidably on the mounting plate (1), and a movable blade (5) mounted on the movable knife carrier (4) on the side close to the fixed blade (6).

3. The thread trimming device for sewing machines according to claim 2, characterized in that said movable blade holder (4) is provided with a plurality of movable blades (5), the cutting edge of said movable blade (5) being arranged close to the movable blade (5).

4. The trimming device for sewing machines according to claim 1, characterized in that the deflocculation sheet (7) is mounted on the movable blade carrier (4) on the side close to the fixed blade (6), the deflocculation sheet (7) being located below the movable blade (5).

5. The trimming device for sewing machines according to claim 1, characterized in that below the mounting plate (1) in correspondence of the fixed blade (6) there is also mounted a thread-clamping blade (8).

6. The thread trimming device for sewing machines according to claim 5, characterized in that the side of the thread clamp (8) remote from the fixed blade (6) is provided with an adjusting blade (9) for adjusting the thread clamping pressure.

7. The thread trimming device for sewing machines according to claim 1, characterized in that the mounting plate (1) is provided at its two ends with a first cylinder (2) and a second cylinder (3) for driving the sliding knife assembly to move, the first cylinder (2) and the second cylinder (3) being connected to the two ends of the movable knife holder (4), respectively.

8. The thread trimming device for sewing machines according to claim 7, characterized in that the mounting plate (1) is provided with a guide block (101) for guiding the movable blade carrier (4) to move, and the movable blade carrier (4) is provided with a sliding slot (401) for the guide block (101) to slide.

9. The thread trimming device for sewing machines according to claim 8, characterized in that the guide block (101) is provided, on the side remote from the mounting plate (1), with a pressure block (102) for limiting the movable blade holder (4).

10. A sewing machine comprising a feed assembly and a sewing assembly, wherein the sewing assembly comprises a thread trimming device for a sewing machine as claimed in any one of claims 1 to 9.