French stitch sewing auxiliary tool
By designing French sewing auxiliary tooling, and using movable edge-retardation and guided tooling to position the leather case, the difficulty and consistency of French sewing in the production of automotive interior parts is solved, and the feasibility of mass production and product quality is improved.
Patent Information
- Application Number
- CN202421636009.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-11
AI Technical Summary
In the production process of soft-covered parts for automotive interior parts, the sewing of French stitches is difficult, especially at corners. It is difficult to ensure consistency when manually controlling sewing, resulting in the product being raised or uneven, which cannot meet the requirements of mass production.
A French sewing auxiliary tooling is designed, including movable edge-facing and guide tooling. Through these auxiliary tooling, the leather case is positioned up, down, left and right to ensure the consistent position during the sewing process.
By using auxiliary tooling, the difficulty of sewing is reduced, the consistency of leather hood sewing is ensured, the use scenarios of French stitching in automobile interiors is broadened, and the process can be put into production in batches, improving product quality.
Smart Images
Figure CN222744535U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of automobile parts production, and specifically relates to a French stitching sewing auxiliary tooling. Background Art
[0002] At present, there are more and more types of soft-covered parts in automotive interior parts, and the appearance of the parts involved tends to be complex, which puts forward higher difficulty and higher requirements for the feasibility of production and manufacturing. The production process of soft-covered parts is: skin cutting → skin sewing → frame and skin covering and laminating → pressure compounding of covering parts (glue activation and adhesion) → product reverse packaging → trimming of excess skin → finished product. French sutures are widely used in the field of sutures due to their beautiful appearance, but due to the difficulty of sewing, they are generally used for straight lines or curves with large arcs. In order to broaden the use scenarios of French sutures, it is necessary to develop an auxiliary tooling to help employees solve problems encountered during the sewing process. The first step of the French sewing process is to sew two pieces of skin together and cut them evenly, and the second step is to sew the sewing edge of the first step to the single-side skin. If the second step is controlled manually, when sewing at the corner of the product, it is necessary to slow down and stretch the skin manually, and the position cannot be 100% guaranteed to be consistent. 80% of the pieces are raised to varying degrees, and 20% of the pieces are flat. The consistency cannot be guaranteed in mass production, and it is not feasible for mass production. The reason is that when sewing the surface thread of the leather, the employees need to stretch the leather to both sides, but they cannot ensure that the stretching strength on both sides is completely consistent. The degree of stretching varies from person to person, resulting in uneven thread spacing. Therefore, it is necessary to transform the sewing machine, add auxiliary sewing tools, and reduce the skill requirements of sewing employees. Utility Model Content
[0003] In order to solve the above problems existing in the prior art, the utility model provides a French suture sewing auxiliary tooling, and the setting of the movable edge and the guide tooling enables the leather cover to be positioned during sewing, thereby realizing mass production.
[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a French suture sewing auxiliary tooling, comprising a sewing machine table, a movable edge located at the upper part of the sewing machine table and a guide tooling located at the lower part of the sewing machine table, the sewing machine table comprising an inner presser foot, an outer presser foot, a fastening bolt, a sewing needle, a sewing table and a feed dog, the inner presser foot is located in the middle of the outer presser foot, the sewing needle is located above the inner presser foot, the sewing table is located below the inner presser foot and the outer presser foot, the feed dog is located in the middle of the sewing table and below the inner presser foot and the outer presser foot, the movable edge is fixed in the outer presser foot by the fastening bolt, the movable edge is located on the right side of the inner presser foot, the guide tooling is fixed on the sewing table, and when sewing, the sewing needle passes through the inner presser foot and the feed dog in sequence.
[0005] Furthermore, a positioning hole is provided at one end of the movable edge, a skin pressing wheel is provided on the left side of the other end, a skin edge with a flat side surface is provided at the lower part of the movable edge, and the skin pressing wheel is fixed above the left side surface of the skin edge.
[0006] Furthermore, a horizontal block is provided on the left side of the top of the guide tooling, the horizontal block is located on the upper surface of the sewing table, a guide block is provided on the top of the horizontal block, the guide block is located on the left side of the sewing needle, and a plurality of positioning holes 2 are provided below the horizontal block on the guide tooling.
[0007] Compared with the prior art, the beneficial effects of the utility model are: the utility model has a reasonable design structure, a simple production process, saves manufacturing costs, is safe and reliable, broadens the use scenarios of French stitching on automotive interiors, and enables the French stitching process to be put into mass production, achieving the established goals of reducing process difficulty, reducing production personnel, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Figure 1 This is a schematic diagram of the sewing structure of the utility model;
[0009] Figure 2 This is an exploded view of the utility model during sewing;
[0010] Figure 3 This is a schematic diagram of the movable side structure of the utility model;
[0011] Figure 4 This is a schematic diagram of the guide tooling structure of the utility model. DETAILED DESCRIPTION
[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0013] See also Figure 1-4 The utility model provides the following technical solutions: a French stitch sewing auxiliary tooling, comprising a sewing machine table, a movable edge S1 located at the upper part of the sewing machine table and a guide tooling S2 located at the lower part of the sewing machine table. After the leather case is pressed, it is placed on the sewing machine table with the front side facing up. The leather case is positioned up, down, left and right by the movable edge S1 and the guide tooling S2, thereby broadening the use scenarios and ensuring the consistency of the leather case sewing, so that mass production can be achieved.
[0014] Specifically, the sewing machine table includes an inner presser foot P1, an outer presser foot P2, a fastening bolt P3, a sewing needle P4, a sewing table P5 and a feed dog P6. The outer presser foot P2 is provided with three feet P2.1, and there are gaps between the three feet P2.1. The inner presser foot P1 is located in the middle of the outer presser foot P2. The inner presser foot P1 is fixed between the two left feet P2.1 on the outer presser foot P2. The sewing needle P4 is located above the inner presser foot P1. The position of the sewing needle P4 facing the inner presser foot P1 is through. When sewing, the sewing needle P4 passes through the inner presser foot P1. The sewing table P5 is located at the inner presser foot. The feed dog P6 is located in the middle of the sewing platform P5 and below the inner presser foot P1 and the outer presser foot P2. The feed dog P6 assists in sending the leather cover forward. The middle of the feed dog P6 is also through for the sewing needle P4 to pass through. The movable side S1 is fixed in the outer presser foot P2 by the fastening bolt P3. The movable side S1 is fixed between the two right feet P2.1 on the outer presser foot P2. The movable side S1 is located on the right side of the inner presser foot P1. The guide tooling S2 is fixed on the sewing platform P5. When sewing, the sewing needle P4 passes through the inner presser foot P1 and the feed dog P6 in sequence.
[0015] Specifically, the leather cover includes skin 1 on the left and skin 2 on the right. Skin 1 is on skin 2. After the right end of skin 1 is crimped, the right side has a crimping contour 4. After the right end of skin 1 is crimped, it bends to the left and forms a process edge 3 together with the left end of skin 2.
[0016] Specifically, a positioning hole S1.1 is provided at one end of the movable edge S1, and a skin pressing wheel S1.3 is provided on the left side of the other end. The movable edge S1 is fixed between the two feet P2.1 on the right side of the outer presser foot P2 by fastening bolts P3 passing through the positioning hole S1.1. A skin edge S1.2 with a flat side surface is provided at the lower part of the movable edge S1. The pressing edge contour 4 contacts the skin edge S1.2 to ensure the position of the right side in the sewing direction of the leather cover. The skin pressing wheel S1.3 is fixed above the left side of the skin edge S1.2 and is located in front of the sewing needle P4. The skin 1 contacts the skin pressing wheel S1.3 to ensure the position of the upper side in the sewing direction of the leather cover. A horizontal block S2.3 is provided on the left side of the top of the guide tooling S2. The flat block S2.3 is located on the upper surface of the sewing table P5, and the horizontal block S2.3 is located in front of the sewing needle P4. The surface skin 2 is in contact with the horizontal block S2.3 to ensure the position of the leather cover on the lower side in the sewing direction. A guide block S2.2 is provided on the top of the horizontal block S2.3. The guide block S2.2 is located on the left side of the sewing needle P4. The guide block S2.2 is in contact with the process edge 3 to ensure the position of the leather cover on the left side in the sewing direction. A plurality of positioning holes S2.1 are provided below the horizontal block S2.3 on the guide tooling S2. The positioning holes S2.1 are set to position the guide tooling S2 first. When the leather cover passes through the auxiliary tooling, the up, down, left and right positions are all controlled. Therefore, the positioning problem of the leather cover during French stitching can be solved.
[0017] The movement process of the utility model is as follows: the employee pushes the leather cover forward, the sewing needle passes through the inner presser foot P1, the surface skin 1, the process edge 3 and the feed dog P6 in sequence, and then returns to the initial position. Then the employee pushes the leather cover forward, and the feed dog P6 also pushes the leather cover forward. This reciprocating process completes French sewing. The employee only needs to control the sewing speed and does not need to worry about the position of the leather cover during the sewing process, which reduces the difficulty of sewing and improves the efficiency of manual sewing.
[0018] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A French stitch sewing auxiliary tool, characterized in that: The invention comprises a sewing machine table, a movable edge (S1) located at the upper part of the sewing machine table and a guide tool (S2) located at the lower part of the sewing machine table. The sewing machine table comprises an inner presser foot (P1), an outer presser foot (P2), a fastening bolt (P3), a sewing needle (P4), a sewing table (P5) and a feed tooth (P6). The inner presser foot (P1) is located in the middle of the outer presser foot (P2), the sewing needle (P4) is located above the inner presser foot (P1), and the sewing table (P5) is located between the inner presser foot (P1) and the outer presser foot (P2). 1) and below the outer presser foot (P2), the feed tooth (P6) is located in the middle of the sewing platform (P5) and below the inner presser foot (P1) and the outer presser foot (P2), the movable edge (S1) is fixed in the outer presser foot (P2) by a fastening bolt (P3), the movable edge (S1) is located on the right side of the inner presser foot (P1), the guide fixture (S2) is fixed on the sewing platform (P5), and when sewing, the sewing needle (P4) passes through the inner presser foot (P1) and the feed tooth (P6) in sequence.
2. The French stitch sewing auxiliary tool according to claim 1, characterized in that: A positioning hole (S1.1) is provided at one end of the movable edge (S1), and a skin pressing wheel (S1.3) is provided on the left side of the other end; a skin edge (S1.2) with a flat side surface is provided at the lower part of the movable edge (S1), and the skin pressing wheel (S1.3) is fixed above the left side of the skin edge (S1.2).
3. The French stitch sewing auxiliary tool according to claim 2, characterized in that: A horizontal block (S2.3) is provided on the left side of the top end of the guide tool (S2), and the horizontal block (S2.3) is located on the upper surface of the sewing platform (P5). A guide block (S2.2) is provided on the top end of the horizontal block (S2.3), and the guide block (S2.2) is located on the left side of the sewing needle (P4). A plurality of positioning holes (S2.1) are provided below the horizontal block (S2.3) on the guide tool (S2).