Edge folding mechanism for sewing machine

Abstract

The utility model discloses an edge folding mechanism for a sewing machine, which relates to the technical field of sewing machines, and comprises a machine body and a workbench arranged on the machine body, and further comprises a placing table for placing cloth copper, a first positioning piece, a folding component and a second positioning piece which are sequentially arranged along the cloth conveying direction, the second positioning piece is arranged at a machine needle of the machine body, the folding assembly comprises a fixing piece arranged on a working table of the machine body and a pressing piece arranged on the outer side of the fixing piece in a surrounding mode, and an edge folding channel with a U-shaped section is formed between the pressing piece and the fixing piece. And by arranging the folding assembly, automatic folding is achieved, manual operation is not needed, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, and more specifically, to a folding mechanism for sewing machines. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interwoven or sewn together.

[0003] When sewing fabrics with existing sewing machines, the sewing fabrics to be sewn need to be folded manually, and the sewing fabrics need to be wrapped around one side of the main fabric before the presser foot, and then the sewing machine is used for sewing, which is troublesome to operate and seriously affects the work efficiency.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a folding mechanism for a sewing machine.

[0006] The technical solution of the utility model is:

[0007] A folding mechanism for a sewing machine comprises a machine body and a workbench arranged on the machine body, and also comprises a placement table for placing cloth, a first positioning member, a folding assembly and a second positioning member arranged in sequence along the cloth transport direction, wherein the second positioning member is arranged at the needle of the machine body, and the folding assembly comprises a fixing member arranged on the workbench of the machine body and a pressing member arranged around the outside of the fixing member, wherein a folding channel with a U-shaped cross section is formed between the pressing member and the fixing member.

[0008] The utility model is further configured that a protrusion is provided on one side of the fixing member facing the pressing member, the protrusion is arranged in an arc shape on the side facing the pressing member, and the vertical cross-sectional area of ​​the protrusion gradually decreases from the cloth transport direction.

[0009] The utility model is further configured such that a contact line with the cloth is formed at one end of the protrusion away from the fixing member, and the contact line is arranged parallel to the end surface of the fixing member, and the contact line is also arranged parallel to the plane where the inner wall of the clamping member is located.

[0010] The utility model is further configured such that the length of the clamping member is greater than the length of the fixing member, and two inclined surfaces corresponding to the two sides of the protruding portion are provided on the two inner side walls of the clamping member, and the inclined surfaces are arranged parallel to the intersection lines between the relative protruding portions and the fixing member.

[0011] The utility model is further configured such that the second positioning member is detachably connected to the workbench, there is a spacing between the second positioning member and the folding assembly, the second positioning member is provided with a positioning groove, the height of the positioning groove is equal to the height at the exit of the folding channel, and the second positioning member is provided with an extension portion on the side facing away from the folding assembly, and the extension portion passes over the presser foot.

[0012] The utility model is further configured that a flattening component is provided between the placement table and the first positioning member, the flattening component is vertically arranged and fixedly connected to the workbench, the flattening component is provided with a flattening groove for the cloth to pass through, and the width of the flattening groove is equal to the thickness of the cloth.

[0013] The utility model is further configured that a positioning column is fixedly connected to the placement table and inserted into the material distributing cylinder, and the diameter of the positioning column is smaller than the hole diameter of the material distributing cylinder.

[0014] The beneficial technical effects of the utility model are:

[0015] By setting up a flattening component, one end of the cloth is sent into the flattening component along the L-shaped component and in contact with the L-shaped component, and touches the guide member on one side of the surrounding member. The guide member has a good guiding effect, so that the cloth can smoothly enter the flattening channel, and the cloth can be flattened by using the flattening roller; through the folding component, the cloth is sent into the folding channel between the pressing member and the fixing member of the folding component, and the pressing member is used to press the cloth, and the protrusion on the fixing member cooperates with the pressing member to fold the cloth, and the vertical cross-sectional area of ​​the protrusion gradually decreases from the cloth transportation direction, and the protrusion is away from the fixing member. One end can contact with the cloth and form a contact line, and the contact line is arranged parallel to the end face of the fixing part, so that the cross-section of the protrusion gradually becomes flat, and with the cooperation of the pressing part, the folding can be made more complete, thereby ensuring the folding effect; after the cloth passes through the folding channel, it is transported to the positioning groove of the second positioning part, and the positioning effect of the positioning groove and the extension part is utilized, so that the folded cloth can be better transported to one side of the main cloth and wrapped on one side. During sewing, the movement of the main cloth can drive the cloth to move together, thereby repeatedly performing automatic folding through the folding assembly, without the need for manual folding, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0018] Figure 3 yes Figure 1 The enlarged view of point B in the middle;

[0019] Figure 4 It is a structural schematic diagram of the folding assembly of the utility model;

[0020] Figure 5 It is an exploded view of the folding assembly of the utility model.

[0021] In the figure, 1, machine body; 11, workbench; 2, placement table; 21, support arm; 22, positioning column; 23, cloth drum; 3, surrounding member; 31, flattening roller; 32, guide member; 33, flattening channel; 4, first positioning member; 5, fixing member; 51, protrusion; 52, pressing member; 53, folding channel; 6, second positioning member; 61, positioning groove; 62, extension part. DETAILED DESCRIPTION

[0022] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0023] A folding mechanism for a sewing machine, such as Figure 1-Figure 5 As shown, it includes a machine body 1 and a workbench 11 arranged on the machine body 1, and also includes a cloth drum 23 for winding cloth, a first positioning member 4, a folding assembly and a second positioning member 6 which are sequentially arranged along the cloth conveying direction.

[0024] A support arm 21 is fixedly connected to the side of the workbench 11 away from the sewing needle on the body 1, and a placing table 2 for placing a fabric tube 23 is fixedly connected to the support arm 21. A positioning column 22 is fixedly connected to the middle position of the top of the placing table 2. The positioning column 22 can be inserted into the middle hole of the fabric tube 23, so as to limit the displacement of the fabric tube 23 in the vertical direction, making the position of the fabric tube 23 more stable. The diameter of the positioning column 22 is smaller than the hole diameter of the fabric tube 23, so that the positioning column 22 and the fabric tube 23 are clearance-matched, so that the fabric tube 23 can rotate freely, thereby making it easier to discharge the material.

[0025] A flattening assembly is provided at a position near the fabric drum 23 on the top of the workbench 11 of the machine body 1 and between the first positioning member 4 and the fabric drum 23. The flattening assembly includes a surrounding member 3 with a U-shaped cross section and a plurality of flattening rollers 31. A flattening channel 33 is formed between the flattening assembly and the surface of the workbench 11. The plurality of flattening rollers 31 are arranged in an array in the horizontal direction in the flattening channel 33. The flattening rollers 31 are rotatably connected to the top of the workbench 11 by means of a shaft hole. The spacing between the flattening rollers 31 and the inner wall of the surrounding member 3 is equal to The thickness of the cloth can be flattened by using the flattening roller 31 to prevent the cloth from folding before entering the folding component, thereby affecting the folding effect and the sewing effect; an arc-shaped guide member 32 is fixedly connected to the opening of the flattening channel 33 close to the placement table 2. The setting of the guide member 32 has a good guiding effect, making it more convenient for the cloth to extend into the flattening channel 33; an L-shaped component is also provided on the workbench 11 on the side of the flattening component close to the placement table 2 to guide the cloth.

[0026] The first positioning member 4 is a cylinder fixedly connected to the workbench 11, which has a good positioning effect and can feed the cloth into the folding assembly in a flat state, thereby ensuring the folding effect.

[0027] The folding assembly includes a fixing member 5 arranged on the workbench 11 of the machine body 1 and a clamping member 52 arranged around the outside of the fixing member 5. The cross section of the clamping member is U-shaped. A protrusion 51 is provided on the side of the fixing member 5 facing the clamping member 52. The protrusion 51 is arranged in an arc shape on the side facing the clamping member 52, so that a folding channel 53 with a U-shaped cross section is formed between the clamping member 52 and the fixing member 5. The vertical cross-sectional area of ​​the protrusion 51 gradually decreases from the cloth transport direction, and the end of the protrusion 51 away from the fixing member 5 can contact with the cloth and form a contact line. The contact line is arranged parallel to the end face of the fixing member 5. The contact line It is also arranged parallel to the plane where the inner wall of the clamping piece is located, so that the cross section of the protrusion 51 gradually becomes flatter, and the distance between the inner wall of the clamping piece and the end of the protrusion 51 remains unchanged. In cooperation with the pressing piece 52, the folding can be more complete, ensuring the transportation quality. Two inclined surfaces corresponding to the two sides of the protrusion 51 are arranged on the two inner side walls of the clamping piece, and the intersection lines between the inclined surfaces and the relative protrusion 51 and the fixing piece 5 are arranged parallel to each other, so that the shortest distance between the inclined surfaces and the relative protrusion 51 is consistent, ensuring the pressing effect of the pressing piece 52 on the cloth, thereby ensuring the folding effect;

[0028] The length of the clamping member is greater than that of the fixing member 5, so that one end of the clamping member extends toward the second positioning member 6 and extends through the fixing member 5, which can play a good guiding effect, thereby making the transportation of the cloth more stable; the outer portion of the pressing member 52 is also arranged in an arc shape, which can prevent bumping and ensure safety in use;

[0029] The second positioning member 6 is detachably connected to the workbench 11 by bolts. The second positioning member 6 is provided with a positioning groove 61 for the folded cloth to pass through. The height of the positioning groove 61 is equal to the thickness of the cloth after being folded in half, and is equal to the height at the exit of the folding channel 53, which can ensure the passage of the cloth and achieve a good positioning effect; the second positioning member 6 is provided with an extension portion 62 on the side away from the folding component, and the extension portion 62 passes over the side of the presser foot away from the placement table 2 in the horizontal direction to ensure the transportation effect of the cloth;

[0030] Working principle: Place the cloth tube 23 full of cloth on the placing table 2, and make the positioning column 22 pass through the cloth tube 23. The cloth tube 23 and the positioning column 22 are in clearance fit, so that the cloth tube 23 can rotate, so as to better discharge the cloth. Send one end of the cloth along the L-shaped member and fit it into the flattening component, and touch the guide member 32 on one side of the surrounding member 3. The guide member 32 has a good guiding effect, so that the cloth can smoothly enter the flattening channel 33, and the flattening roller 31 can be used to flatten the cloth; then pass through the first positioning member 4, transport it to the folding component along the first positioning member 4, enter the folding channel 53 between the pressing member 52 and the fixing member 5, use the pressing member 52 to press the cloth, and use the protrusion 51 on the fixing member 5 to press the cloth. The parts 52 cooperate with each other to fold the cloth, and the vertical cross-sectional area of ​​the protrusion 51 gradually decreases from the direction of cloth transportation, and the end of the protrusion 51 away from the fixing part 5 can contact the cloth and form a contact line, and the contact line is arranged in parallel with the end face of the fixing part 5, so that the cross-section of the protrusion 51 gradually becomes flat, and with the cooperation of the pressing part 52, the folding can be made more complete, thereby ensuring the folding effect; after the cloth passes through the folding channel 53, it is transported to the positioning groove 61 of the second positioning part 6, and the positioning effect of the positioning groove 61 and the extension part 62 can be used to better transport the folded cloth to one side of the main cloth and wrap it on one side. When sewing, the movement of the main cloth can drive the cloth to move together, so that automatic folding is repeated through the folding assembly, and manual folding is not required, thereby improving work efficiency.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A folding mechanism for a sewing machine, comprising a machine body (1) and a workbench (11) arranged on the machine body (1), characterized in that: The invention also comprises a placement table (2) for placing a fabric tube (23), a first positioning member (4), a folding assembly and a second positioning member (6) which are arranged in sequence along the fabric transport direction, wherein the second positioning member (6) is arranged at the needle of the machine body (1), and the folding assembly comprises a fixing member (5) arranged on a working table (11) of the machine body (1) and a pressing member (52) arranged around the outside of the fixing member (5), wherein a folding channel (53) with a U-shaped cross section is formed between the pressing member (52) and the fixing member (5).

2. The hemming mechanism for a sewing machine according to claim 1, characterized in that: The fixing member (5) is provided with a protruding portion (51) on one side facing the pressing member (52); the protruding portion (51) is arranged in an arc shape on the side facing the pressing member (52); and the vertical cross-sectional area of ​​the protruding portion (51) gradually decreases from the direction of cloth transportation.

3. The folding mechanism for a sewing machine according to claim 2, characterized in that: A contact line with the cloth is formed at one end of the protrusion (51) away from the fixing member (5), and the contact line is arranged parallel to the end surface of the fixing member (5), and the contact line is also arranged parallel to the plane where the inner wall of the clamping member is located.

4. The hemming mechanism for a sewing machine according to claim 3, characterized in that: The length of the clamping member is greater than the length of the fixing member (5), and two inclined surfaces corresponding to the two sides of the protruding portion (51) are arranged on the two inner side walls of the clamping member, and the inclined surfaces are arranged parallel to the intersection lines between the opposite protruding portions (51) and the fixing member (5).

5. The hemming mechanism for a sewing machine according to claim 1, characterized in that: The second positioning member (6) is detachably connected to the workbench (11); there is a distance between the second positioning member (6) and the folding assembly; the second positioning member (6) is provided with a positioning groove (61); the height of the positioning groove (61) is equal to the height of the outlet of the folding channel (53); the second positioning member (6) is provided with an extension portion (62) on the side away from the folding assembly; the extension portion (62) horizontally passes over the side of the presser foot away from the placement table (2).

6. The hemming mechanism for a sewing machine according to claim 1, characterized in that: A flattening component is provided between the placement table (2) and the first positioning member (4); the flattening component is vertically arranged and fixedly connected to the workbench (11); and the flattening component is provided with a flattening channel (33) for the cloth to pass through.

7. The hemming mechanism for a sewing machine according to claim 1, characterized in that: A positioning column (22) is fixedly connected to the placement table (2) and is inserted into the material distributing cylinder (23); the diameter of the positioning column (22) is smaller than the hole diameter of the material distributing cylinder (23).

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