Adjustable presser foot for bar tacking machine and bar tacking machine

Abstract

The utility model discloses an adjustable presser foot for a bar tacking machine and the bar tacking machine, relates to the technical field of bar tacking machines, and aims to solve the problem that the frame selection space of the presser foot of the existing bar tacking machine cannot be adjusted. The adjustable presser foot for the bar tacking machine comprises a front presser foot assembly and a rear presser foot assembly, the front presser foot assembly is movably connected with the rear presser foot assembly through the adjusting assembly, the front presser foot assembly moves in the direction close to or away from the rear presser foot assembly through the adjusting assembly, in this way, the space selected by the presser foot frame can be adjusted so as to be suitable for sewing different types of patterns, and efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of overlock machine, more specifically, relate to an adjustable presser foot for overlock machine and overlock machine. BACKGROUND

[0002] The overlock machine sewing machine is also called a jujube car and a knot machine, is usually used to reinforce stitches, is generally suitable for clothing, knitting, sweater, suit, jeans, etc. Production factory uses. The overlock machine presser foot refers to a special presser foot used on the sewing machine, which is used to give better support and stability to the fabric when sewing. The overlock machine presser foot is usually used for sewing collar, cuff, pocket, etc. The part needs to be finely processed, which can help the sewing worker to better control the fabric, so that the product is more beautiful and fine.

[0003] At present, in the overlock machine industry, with the continuous development of the times, various overlock patterns emerge in an endless stream, and in the face of these long, short, wide or narrow overlock patterns, however, the existing overlock machine presser foot is determined on the basis of the known pattern, the space required by the pattern is determined, then the space size of the presser foot is determined according to the space, and the presser foot is manufactured by using the space size. The existing overlock machine presser foot is not adjustable, therefore, the overlock machine presser foot of one specification is only suitable for sewing one pattern, when sewing other patterns, the presser foot cannot be used, or can be used, but the failure rate will increase and the efficiency will decrease.

[0004] Therefore, how to solve the problem of the space selected by the existing overlock machine presser foot is not adjustable is a problem that the technical personnel in the field urgently need to solve. INVENTION CONTENTS

[0005] Therefore, the utility model aims at providing an adjustable presser foot for overlock machine, which can adjust the space selected by the presser foot to be suitable for sewing different kinds of patterns and improve the efficiency.

[0006] Another object of the utility model is to provide an overlock machine comprising the adjustable presser foot for overlock machine, which can increase the applicable range.

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] An adjustable presser foot for overlock machine, comprising a front presser foot assembly and a rear presser foot assembly, the front presser foot assembly is movably connected with the rear presser foot assembly through an adjusting assembly, and the front presser foot assembly moves towards or away from the rear presser foot assembly through the adjusting assembly.

[0009] Preferably, the front presser foot assembly comprises a pair of oppositely arranged front presser foot arms, the rear presser foot assembly comprises a pair of oppositely arranged rear presser foot arms, and the front presser foot arm is connected with the corresponding rear presser foot arm through the adjusting assembly.

[0010] Preferably, the adjusting assembly comprises a connecting bolt, an adjusting nut and a spring, the connecting bolt is used for connecting the front presser arm and the rear presser arm, the adjusting nut is used for adjusting the distance between the front presser arm and the rear presser arm, and the spring is sleeved on the outer periphery of the connecting bolt and used for providing a pre-tightening force for moving the front presser arm away from the rear presser arm.

[0011] Preferably, the front presser arm comprises a front presser portion, a side presser portion and a connecting portion, the connecting portion is arranged at one end of the front presser portion, the connecting portion is provided with a bolt hole, and the side presser portion is arranged perpendicularly on the end face of the front presser portion close to the rear presser arm and close to the connecting portion.

[0012] Preferably, the rear presser arm comprises a mounting portion, a connecting portion and a rear presser portion which are sequentially connected, the mounting portion is provided with a mounting hole, and the connecting portion is in an inverted L-shaped structure.

[0013] Preferably, the rear presser portion comprises a first presser portion parallel to the front presser portion and a second presser portion parallel to the side presser portion, the first presser portion is provided with a slot close to the bottom of the second presser portion, the slot is an inverted U-shaped slot, and the side presser portion is arranged along the slot.

[0014] Preferably, the second presser portion is provided with a limiting slot for limiting the movement of the spring, the limiting slot extends along the length direction of the second presser portion, the opening of the limiting slot faces the inner side of the second presser portion, and the rear end of the limiting slot is provided with a bolt hole for the connecting bolt to pass through.

[0015] Preferably, the top of one end of the side presser portion close to the connecting portion is provided with a boss, and the inner side of the second presser portion is provided with an extension portion which is pressed against the boss.

[0016] Preferably, the bottom of the front presser arm and the bottom of the rear presser wall are both provided with anti-skid lines.

[0017] A knot tying machine comprises the adjustable presser for knot tying machine.

[0018] The adjustable presser for knot tying machine comprises a front presser assembly and a rear presser assembly, the front presser assembly is movably connected with the rear presser assembly through an adjusting assembly to form a presser frame with adjustable cloth pressing range, the front presser assembly moves towards or away from the rear presser assembly through the adjusting assembly, the space selected by the presser frame is reduced and the cloth pressing range is reduced by adjusting the front presser assembly to move towards the rear presser assembly through the adjusting assembly, the space selected by the presser frame is increased and the cloth pressing range is increased by adjusting the front presser assembly to move away from the rear presser assembly through the adjusting assembly, the space selected by the presser frame is adjusted to be suitable for sewing various patterns of different specifications, thereby improving the efficiency of sewing patterns. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute a part of the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor based on the provided drawings.

[0020] Figure 1 Structure diagram of adjustable presser foot for the knot tying machine provided by the present application;

[0021] Figure 2 Explosion view of adjustable presser foot for the knot tying machine provided by the present application;

[0022] Figure 3 Partial structure diagram of front presser foot assembly provided by the present application;

[0023] Figure 4 Partial structure diagram of rear presser foot assembly provided by the present application.

[0024] Reference signs:

[0025] 1-front presser foot assembly, 11-front presser foot part, 12-side presser foot part, 121-boss, 13-connection part;

[0026] 2-rear presser foot assembly, 21-mounting part, 22-connection part, 23-rear presser foot part, 231-slot, 232-limiting slot, 233-extension part;

[0027] 3-adjustment assembly, 31-connection bolt, 32-adjustment nut, 33-spring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0030] The core of the utility model is to provide a adjustable presser foot for a looping machine, which can adjust the space of the presser foot frame to be suitable for sewing different patterns and improve the efficiency.

[0031] Please refer to Figure 1 A adjustable presser foot for a looping machine comprises a front presser foot assembly 1 and a rear presser foot assembly 2.

[0032] Specifically, the front presser foot assembly 1 is movably connected with the rear presser foot assembly 2 through the adjusting assembly 3 to form a presser foot frame with adjustable cloth pressing range. The front presser foot assembly 1 moves towards or away from the rear presser foot assembly 2 through the adjusting assembly 3. When the front presser foot assembly 1 moves towards the rear presser foot assembly 2 through the adjusting assembly 3, the space of the presser foot frame is reduced and the cloth pressing range is reduced. When the front presser foot assembly 1 moves away from the rear presser foot assembly 2 through the adjusting assembly 3, the space of the presser foot frame is increased and the cloth pressing range is increased. The space of the presser foot frame is adjusted to be suitable for sewing patterns of various specifications, thereby improving the efficiency of sewing patterns.

[0033] The rear presser foot assembly 2 is installed on the looping machine.

[0034] The adjustable presser foot for a looping machine is set in the above manner. The distance between the front presser foot assembly 1 and the rear presser foot assembly 2 is adjusted to adjust the overall cloth pressing range to be suitable for sewing patterns of various specifications.

[0035] In the above embodiment, the front presser foot assembly 1 comprises a pair of oppositely arranged front presser foot arms, and the rear presser foot assembly 2 comprises a pair of oppositely arranged rear presser foot arms. The front presser foot arms are connected with the corresponding rear presser foot arms through the adjusting assembly 3.

[0036] It should be noted that the front presser foot assembly 1 comprises a pair of oppositely arranged front presser foot arms, and the two front presser foot arms form a half front presser foot frame for pressing cloth. The rear presser foot assembly 2 comprises a pair of oppositely arranged rear presser foot arms, and the two rear presser foot arms form a rear presser foot frame for pressing cloth. The front presser foot arms are adjustably connected with the rear presser foot arms to adjust the distance between the front presser foot arms and the rear presser foot arms, thereby adjusting the cloth range framed by the front presser foot frame and the rear presser foot frame.

[0037] Please refer to Figure 2 The adjusting assembly 3 comprises a connecting bolt 31, an adjusting nut 32 and a spring 33. The connecting bolt 31 is used to connect the front presser foot arms and the rear presser foot arms. The adjusting nut 32 is used to adjust the distance between the front presser foot arms and the rear presser foot arms. The spring 33 is sleeved on the outer periphery of the connecting bolt 31, and the spring 33 is used to provide a pre-tightening force for moving the front presser foot arms away from the rear presser foot arms.

[0038] It can be understood that by screwing the adjusting nut 32 on the connecting bolt 31, the distance between the front presser bar and the rear presser bar is adjusted, and at the same time, when the adjusting nut 32 is screwed, the spring 33 provides a pre-tightening force to move the front presser bar away from the rear presser bar, so that the front presser bar cannot slide towards the rear presser bar, and the stability of the connection between the front presser bar and the rear presser bar is affected by the elastic force of the spring 33.

[0039] Among them, the strong spring 33 is generally selected, which can well fix the front presser bar, and this connection mode can also realize replacement of the front presser bar. When replacing the front presser bar, only the adjusting nut 32 is loosened, and the replacement can be easily done, even by a novice, which is convenient to use.

[0040] Please refer to Figure 3 , the front presser bar includes a front presser part 11, a side presser part 12 and a connecting part 13, the connecting part 13 is arranged at one end of the front presser part 11, the connecting part 13 is provided with a bolt hole, and the side presser part 12 is arranged vertically on the end face of the front presser part 11 close to the rear presser bar, and the side presser part 12 is arranged close to the connecting part 13.

[0041] It should be noted that the front presser bar and the rear presser bar are connected through the bolt hole on the connecting part 13, and the front presser part 11 and the side presser part 12 are used to press the front half of the cloth.

[0042] Please refer to Figure 2 , the rear presser arm includes a mounting part 21, a connecting part 22 and a rear presser part 23 connected in sequence, the mounting part 21 is provided with a mounting hole, and the connecting part 13 is in inverted L-shaped structure.

[0043] It can be understood that the screw is installed through the mounting hole on the mounting part 21 to realize the connection of the rear presser arm and the looping machine, the force of the looping machine is transmitted to the rear presser part 23 through the connecting part 22, and the force is transmitted to the front presser arm through the effective connection of the rear presser part 23 and the front presser arm to realize the effective pressing of the cloth.

[0044] Please refer to Figure 4 , the rear presser part 23 includes a first presser part parallel to the front presser part 11 and a second presser part parallel to the side presser part 12, the first presser part is provided with a slot 231 close to the bottom of the second presser part, the slot 231 is an inverted U-shaped slot, and the side presser part 12 is arranged along the slot 231.

[0045] It should be noted that a wide slot 231 is opened below the first presser foot, and the side presser foot 12 is arranged along the slot 231. When the inside frame space is found to be large in the left and right areas during the use of the adjustable presser foot, the front presser arm can be replaced to select the wider side presser foot 12 for use, so that the left and right spaces inside the presser foot are reduced. By rotating the adjusting nut 32, the front and rear spaces inside the presser foot are adjusted, so that the front and rear and left and right spaces inside the presser foot are adjusted.

[0046] In the above embodiment, the second presser foot is provided with a limiting slot 232 for limiting the movement of the spring 33. The limiting slot 232 extends along the length direction of the second presser foot, the opening of the limiting slot 232 faces the inner side of the second presser foot, and the rear end of the limiting slot 232 is provided with a bolt hole for the connecting bolt 31 to pass through.

[0047] It can be understood that the connecting bolt 31 passes through the connecting part 13, the spring 33, the limiting slot 232 and the adjusting nut 32, and the front presser arm is moved by rotating the adjusting nut 32, so as to adjust the space inside the presser foot.

[0048] As a preferred embodiment, the top of one end of the side presser foot 12 close to the connecting part 13 is provided with a boss 121, and the inner side of the second presser foot is provided with an extension 233 which is pressed on the boss 121.

[0049] It should be noted that because the front presser arm will be lifted on one side when pressing the cloth, so that the cloth cannot be pressed, the extension 233 extending inward is arranged on the rear presser arm to provide a pressure to the front presser arm to prevent it from being lifted on one side.

[0050] In the above case, the bottom of the front presser arm and the rear presser wall are both provided with anti-skid lines.

[0051] It can be understood that by arranging the anti-skid lines, the friction between the presser foot and the cloth is increased to better press the cloth.

[0052] In summary, the adjustable presser foot for the knotting machine provided by the utility model can select different stitch patterns according to the cloth to be sewn at the beginning of sewing, rotate the adjusting nut 32 according to the different stitch patterns, pull the connecting bolt 31 backward (toward the rear presser arm), and drive the front presser arm to move backward and compress the spring 33, so as to prevent the front presser arm from sliding backward and affecting the sewing and breaking the needle.

[0053] By rotating the adjusting nut 32, the front presser arm can be retracted inwardly under the driving of the connecting bolt 31, so as to adjust the front and back space of the presser, that is, by moving the front presser cloth part, the front and back space of the presser is changed, by replacing the front presser arm, the front presser arm with wider or narrower side presser part 12 is selected, so as to adjust the left and right space of the presser, by replacing the front presser cloth part, the left and right space of the presser is changed.

[0054] In addition to the adjustable presser for a looping machine disclosed in the above various embodiments, the utility model also provides a looping machine comprising the adjustable presser for a looping machine, the structures of other parts of the looping machine refer to the prior art, and will not be repeated here.

[0055] It should be noted that in the specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0056] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between various embodiments can be referred to each other.

[0057] The adjustable presser for a looping machine and the looping machine provided by the utility model are described in detail above. The principle and implementation mode of the utility model are described by applying specific examples in this paper, and the description of the above embodiments is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. An adjustable presser foot for a bar knotting machine, characterized in that, It includes a front presser foot assembly (1) and a rear presser foot assembly (2). The front presser foot assembly (1) is movably connected to the rear presser foot assembly (2) via an adjustment assembly (3). The front presser foot assembly (1) can move towards or away from the rear presser foot assembly (2) via the adjustment assembly (3).

2. The adjustable presser foot for the knotting machine according to claim 1, characterized in that, The front presser foot assembly (1) includes a pair of oppositely arranged front presser foot arms, and the rear presser foot assembly (2) includes a pair of oppositely arranged rear presser foot arms. The front presser foot arms and the corresponding rear presser foot arms are connected by the adjustment assembly (3).

3. The adjustable presser foot for the knotting machine according to claim 2, characterized in that, The adjustment assembly (3) includes a connecting bolt (31), an adjusting nut (32), and a spring (33). The connecting bolt (31) is used to connect the front presser arm and the rear presser arm. The adjusting nut (32) is used to adjust the distance between the front presser arm and the rear presser arm. The spring (33) is sleeved on the outer periphery of the connecting bolt (31). The spring (33) is used to provide a preload force that moves the front presser arm away from the rear presser arm.

4. The adjustable presser foot for the knotting machine according to claim 3, characterized in that, The front presser arm includes a front presser foot (11), a side presser foot (12), and a connecting part (13). The connecting part (13) is located at one end of the front presser foot (11) and has bolt holes. The side presser foot (12) is vertically located on the end face of the front presser foot (11) near the rear presser arm and is located near the connecting part (13).

5. The adjustable presser foot for the knotting machine according to claim 4, characterized in that, The rear presser arm includes a mounting part (21), a connecting part (22) and a rear presser part (23) connected in sequence. The mounting part (21) is provided with mounting holes, and the connecting part (13) has an inverted L-shaped structure.

6. The adjustable presser foot for the knotting machine according to claim 5, characterized in that, The rear presser foot (23) includes a first presser foot parallel to the front presser foot (11) and a second presser foot parallel to the side presser foot (12). The first presser foot is provided with a groove (231) near the bottom of the second presser foot. The groove (231) is an inverted U-shaped groove. The side presser foot (12) is movably arranged along the groove (231).

7. The adjustable presser foot for the knotting machine according to claim 6, characterized in that, The second pressure foot is provided with a limiting groove (232) for limiting the movement of the spring (33). The limiting groove (232) extends along the length direction of the second pressure foot. The opening of the limiting groove (232) faces the inside of the second pressure foot. The rear end of the limiting groove (232) is provided with a bolt hole for the connecting bolt (31) to pass through.

8. The adjustable presser foot for the knotting machine according to claim 7, characterized in that, The side presser foot (12) has a boss (121) at the top of one end near the connecting part (13), and the inner side of the second presser foot has an extension (233) that presses against the boss (121).

9. The adjustable presser foot for the knotting machine according to any one of claims 2-8, characterized in that, The bottom of both the front and rear presser feet is provided with anti-slip texture.

10. A knotting machine, characterized in that, The adjustable presser foot for the knotting machine as described in any one of claims 1-9.

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