Sewing and edge folding tool for headrest leather decoration strip

Abstract

The utility model provides a sewing and edge folding tool for a headrest leather decoration strip, which comprises a transition deformation shell which is provided with a leather inlet and a leather outlet and can automatically fold a single-layer leather strip, and a leather guide mechanism which is arranged outside the leather inlet of the transition deformation shell and is used for guiding the leather strip into the transition deformation shell, the leather material guiding mechanism comprises a frame body fixedly connected with the transition deformation shell and a plurality of guiding rods which are rotatably installed on the frame body and arranged at intervals, and the leather material strip sequentially penetrates through the guiding rods in a penetrating mode and bypasses the guiding rods. According to the utility model, the single-layer leather material strip is sequentially inserted and wound around the plurality of guide rods of the leather material guide mechanism, and the plurality of guide rods guide the leather material to enter the transition deformation shell, so that the leather material strip can smoothly enter the transition deformation shell, and the leather material strip can be prevented from being curled and wrinkled; when the leather strips are fed, the guide rods rotate to reduce friction resistance, so that the leather strips are guided into the transition deformation shell more smoothly, and the situation of material blocking is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewing of headrest leather decorative strips, and particularly relates to a sewing and hemming tooling for headrest leather decorative strips. Background Art

[0002] A seat headrest (hereinafter referred to as the headrest) is generally arranged at the upper part of the seat backrest. The occupant of the seat leans the head on the headrest to improve the comfort of the head; and in a vehicle accident, especially a rear-end collision that causes the occupant to move suddenly backward, the headrest can also prevent the occupant's neck and head from being injured. However, with the increasingly fierce market competition, consumers have higher and higher requirements for the refined quality of automotive interiors. For some high-end vehicles, in order to improve the aesthetics of the headrest appearance, decorative strips are added to the headrest. The surface of the headrest is a surface layer made of leather, and the decorative strips are double-layer leather with different colors sewn on the surface layer.

[0003] A hemming tooling is an auxiliary tooling for a sewing machine that automatically folds a single-layer material. For example, the strip folding device disclosed in CN201710784227.3 introduces the strip into the transition deformation shell through a strip guiding bracket, and the strip is automatically folded in half from the middle through the transition deformation structure of the transition deformation shell. The strip guiding bracket is a wavy shape bent from a metal strip. For a soft fabric, the fabric is wound around the strip guiding bracket, and the wavy strip guiding bracket has a good guiding effect; however, the softness of the leather is not as good as that of the fabric, and the leather is harder. Winding the leather around the wavy strip guiding bracket and introducing it into the transition deformation shell will form irreparable wrinkles on the surface of the leather with poor ductility, affecting the appearance of the decorative strip. Summary of the Utility Model

[0004] The utility model aims to solve the technical problems existing in the prior art, and the purpose of the utility model is to provide a sewing and hemming tooling for headrest leather decorative strips.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme: A sewing and hemming tooling for headrest leather decorative strips includes a transition deformation shell with a leather inlet and a leather outlet that can automatically fold a single-layer leather strip, and a leather guiding mechanism arranged outside the leather inlet of the transition deformation shell for introducing the leather strip into the transition deformation shell. The leather guiding mechanism includes a frame body fixedly connected to the transition deformation shell and a plurality of guiding rods rotatably installed on the frame body at intervals. The leather strip sequentially passes through and winds around the plurality of guiding rods; the frame body includes two installation strips fixedly connected to the transition deformation shell, the two installation strips are respectively located on both sides of the leather inlet of the transition deformation shell, the distance between the two installation strips matches the width of the leather strip, and both ends of the guiding rod are rotatably connected to the two installation strips.

[0006] In the above technical solution, the single-layer leather strip is sequentially inserted and bypassed around multiple guide rods of the leather guiding mechanism, and the multiple guide rods guide the leather into the transition deformation housing, ensuring that the leather strip smoothly enters the transition deformation housing and avoiding curling and wrinkling of the leather strip; the two mounting strips limit the two sides in the width direction of the leather strip, preventing the leather strip from shifting; when the leather strip is fed, the guide rods rotate to reduce the frictional resistance, making the leather strip more smoothly guided into the transition deformation housing and avoiding jamming.

[0007] In a preferred embodiment of the present utility model, the guide rods extend along the width direction of the leather strip, and multiple guide rods are arranged at intervals on a straight line and are parallel to each other.

[0008] In the above technical solution, the distances between the two ends of adjacent guide rods are equal. Compared with the wavy insert guiding bracket formed by bending a metal strip, it can prevent the leather strip from generating wrinkles at the bending position.

[0009] In a preferred embodiment of the present utility model, a notch groove is provided on the side surface of the transition deformation housing.

[0010] In the above technical solution, it is convenient for workers to feed the head of the leather strip into the leather inlet of the transition deformation housing through the notch groove and send it out from the leather outlet.

[0011] In a preferred embodiment of the present utility model, a connecting plate with a connection hole is welded on the outside of the transition deformation housing, and a fastening bolt passes through the connection hole and is threadedly connected to the sewing machine operation table.

[0012] In the above technical solution, the transition deformation housing is fixed on the sewing machine operation table through the connecting plate.

[0013] In another preferred embodiment of the present utility model, a guide block is fixedly connected to the sewing machine operation table on the opposite side of the connecting plate, and a guiding channel for the output of the folded leather is formed between the guide block and the connecting plate.

[0014] In the above technical solution, the guiding channel plays a guiding role to prevent the folded leather strip from shifting during the process of moving to the sewing needle position.

[0015] In another preferred embodiment of the present utility model, the leather inlet of the transition deformation housing is in the shape of a vertical first strip-shaped opening, the leather outlet of the transition deformation housing is in the shape of a horizontal second strip-shaped opening, the length and width of the first strip-shaped opening are respectively adapted to the width and thickness of the leather strip, the length of the second strip-shaped opening is less than that of the first strip-shaped opening, and the middle part of the transition deformation housing gradually transitions from the vertical first strip-shaped opening to the horizontal second strip-shaped opening.

[0016] In the above technical solution, the leather inlet is in the shape of a vertical strip opening, and the leather outlet is in the shape of a horizontal strip opening, so that the single-layer leather passing through the transition deformation housing is automatically folded in half into a double-layer leather in the middle.

[0017] In another preferred embodiment of the present invention, the length of the second strip-shaped opening is adapted to 1 / 2 of the width of the leather strip.

[0018] In the above technical solution, by setting the second strip-shaped opening with an appropriate length, the two sides of the double-layer leather after folding are just aligned, which is more beautiful.

[0019] In another preferred embodiment of the present invention, the leather inlet of the transition deformation housing is in the shape of a horizontal third strip-shaped opening, and the leather outlet of the transition deformation housing is in the shape of a horizontal fourth strip-shaped opening. The length and width of the third strip-shaped opening are adapted to the leather strip. The length of the fourth strip-shaped opening is less than the length of the third strip-shaped opening, and the width of the fourth strip-shaped opening is greater than the width of the third strip-shaped opening. The middle part of the transition deformation housing gradually transitions from the horizontal third strip-shaped opening to the horizontal fourth strip-shaped opening.

[0020] In the above technical solution, both the leather inlet and the leather outlet are in the shape of a horizontal strip opening, so that the single-layer leather passing through the transition deformation housing is folded from both sides to the middle.

[0021] In another preferred embodiment of the present invention, the length of the fourth strip-shaped opening is less than 1 / 2 of the width of the leather strip and greater than 1 / 3 of the width of the leather strip.

[0022] In the above technical solution, by setting the fourth strip-shaped opening with an appropriate length, the middle position of the leather strip after folding is three layers of leather, and a single sewing line can fix it.

[0023] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0025] Figure 1 is a schematic structural diagram of a sewing hemming tool for a headrest leather decorative strip in Embodiment 1.

[0026] Figure 2 is a schematic diagram of a leather strip sequentially passing through and winding around multiple guide rods.

[0027] Figure 3 is a folding state diagram of the leather strip after hemming using the transition deformation housing in Embodiment 1.

[0028] Figure 4 It is a schematic structural diagram of the transitional deformation housing in the second embodiment.

[0029] Figure 5 It is a folded state diagram after hemming the leather strip using the transitional deformation housing in the second embodiment.

[0030] The reference numerals in the attached drawings of the specification include: transitional deformation housing 10, leather inlet 11, leather outlet 12, notch groove 13, leather guiding mechanism 20, frame body 21, mounting strip 211, guiding rod 22, connecting plate 30, connecting hole 31, guiding block 40, guiding channel 50. Detailed implementation manners

[0031] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the attached drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the attached drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0032] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "vertical", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the attached drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0033] In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific situations.

[0034] Embodiment 1

[0035] This embodiment provides a sewing and hemming tooling for a headrest leather trim strip, as Figure 1As shown, in a preferred embodiment, it includes a transition deformation housing 10 capable of automatically hemming a single-layer leather strip and having a leather strip inlet 11 and a leather strip outlet 12, and a leather strip guiding mechanism 20 provided outside the leather strip inlet 11 of the transition deformation housing 10 for introducing the leather strip into the transition deformation housing 10. The leather strip inlet 11 is located at the front end of the transition deformation housing 10, the leather strip outlet 12 is located at the rear end of the transition deformation housing 10, a notch groove 13 is provided on the side surface of the transition deformation housing 10, and the leather strip guiding mechanism 20 is provided at the rear side of the transition deformation housing 10. Among them, the leather strip guiding mechanism 20 includes a frame body 21 fixedly connected to the outer wall of the transition deformation housing 10, and a plurality of guiding rods 22 arranged at intervals and rotatably installed on the frame body 21. As Figure 2 shown, the leather strip sequentially passes through and winds around a plurality of guiding rods 22, and is guided by the plurality of guiding rods 22 into the transition deformation housing 10; preferably, the guiding rods 22 extend along the width direction of the leather strip, and the plurality of guiding rods 22 are equally spaced and arranged in a straight line and parallel to each other.

[0036] In this embodiment, the leather strip inlet 11 of the transition deformation housing 10 is in the shape of a first vertical strip-shaped opening, the leather strip outlet 12 of the transition deformation housing 10 is in the shape of a second horizontal strip-shaped opening, and the middle part of the transition deformation housing 10 gradually transitions from the first vertical strip-shaped opening to the second horizontal strip-shaped opening. The length of the first strip-shaped opening is adapted to the width of the leather strip, slightly larger than the width of the leather strip, the width of the first strip-shaped opening is adapted to the thickness of the leather strip, slightly larger than the thickness of a single-layer leather strip. The length of the second strip-shaped opening is smaller than that of the first strip-shaped opening. Preferably, the length of the second strip-shaped opening is adapted to 1 / 2 of the width of the leather strip, slightly larger than 1 / 2 of the width of the leather strip, and the width of the second strip-shaped opening is slightly larger than the thickness of two layers of leather strips.

[0037] When using this hemming tooling, the transition deformation housing 10 is fixed on the sewing machine workbench, and the single-layer leather strip is sequentially passed through and wound around a plurality of guiding rods 22. The leather strip is introduced into the transition deformation housing 10 through the plurality of rotatable guiding rods 22, which can avoid curling and wrinkling of the leather strip and keep it flat; by using the notch groove 13 on the side surface of the transition deformation housing 10, the worker drives the head of the leather strip through the transition deformation housing 10 with fingers or other auxiliary tools. The original state of the leather strip is a single-layer strip. During the process of passing through the transition deformation housing 10, the leather strip is automatically folded in half by using the transition deformation structure of the transition deformation housing 10. As Figure 3 shown, the leather strip is folded in half from the middle into a double-layer leather strip, and the folded leather strip exits from the front end of the transition deformation housing 10, and then moves to the position of the sewing needle of the sewing machine, and the folded leather strip is sewn and fixed by using the sewing machine.

[0038] It should be noted that in practice, the distance between the guide rods 22 should be set according to the thickness and ductility of the leather strip. The distance between the guide rods 22 should be preferably large rather than small to ensure the flatness of the leather strip.

[0039] As Figure 1 shown, in the present utility model, the frame body 21 includes two mounting strips 211 fixedly connected to the upper and lower ends of the transition deformation housing 10 respectively. The two mounting strips 211 are respectively located on the upper and lower sides of the leather inlet 11 of the transition deformation housing 10. The distance between the two mounting strips 211 matches the width of the leather strip and is slightly larger than the width of the leather strip. The two ends of the guide rod 22 are respectively rotatably connected to the two mounting strips 211. Preferably, a support is fixedly connected to the sewing machine operating table, and the frame body 21 is fixedly connected to the support to improve the firmness of the leather guiding mechanism 20.

[0040] As Figure 1 shown, in the present utility model, a connecting plate 30 with a connecting hole 31 is welded to the outside of the transition deformation housing 10. The connecting hole 31 is a strip-shaped hole, and multiple fastening bolts pass through the connecting hole 31 and are threadedly connected to the sewing machine operating table to fix the transition deformation housing 10 on the sewing machine operating table.

[0041] As Figure 1 shown, in another preferred embodiment, a guide block 40 is fixedly connected to the sewing machine operating table on the opposite side of the connecting plate 30. The guide block 40 and the connecting plate 30 are respectively located on the left and right sides of the front end of the transition deformation housing 10. A guiding channel 50 for the output of the folded leather is formed between the guide block 40 and the connecting plate 30. The folded leather strip passing through the front end of the transition deformation housing 10 is moved to the sewing needle position of the sewing machine under the guiding action of the guiding channel 50, avoiding the deviation of the folded leather strip.

[0042] Embodiment 2

[0043] The structural principle of this embodiment is basically the same as that of Embodiment 1. The difference lies in that the structure of the transition deformation housing 10 is different. As Figure 4 shown, in this embodiment, the leather inlet 11 of the transition deformation housing 10 is in the shape of a horizontal third strip-shaped opening, and the leather outlet 12 of the transition deformation housing 10 is in the shape of a horizontal fourth strip-shaped opening. The middle part of the transition deformation housing 10 gradually transitions from the horizontal third strip-shaped opening to the horizontal fourth strip-shaped opening. Among them, the length and width of the third strip-shaped opening are adapted to the leather strip. The third strip-shaped opening has the same structure and size as the first strip-shaped opening in Embodiment 1, only the direction is changed; the length of the fourth strip-shaped opening is less than that of the third strip-shaped opening. Preferably, the length of the fourth strip-shaped opening is less than 1 / 2 of the width of the leather strip and greater than 1 / 3 of the width of the leather strip, and the width of the fourth strip-shaped opening is slightly larger than the thickness of the three-layer leather strip.

[0044] In this embodiment, during the process of the single-layer strip-shaped leather strip passing through the transition deformation housing 10, automatic folding is performed by using the transition deformation structure of the transition deformation housing 10. As Figure 3 shown, both sides of the leather strip are folded towards the middle. After folding, the middle position of the leather strip is three layers of leather, and the middle position of the folded leather strip is sewn and fixed by a sewing machine.

[0045] It should be noted that in this embodiment, according to actual requirements, the length of the leather outlet 12 can be adjusted to change the width of the leather coincidence at the middle position of the folded leather strip.

[0046] In the description of this specification, the descriptions referring to terms such as "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A sewing and hemming tool for a headrest leather decorative strip, comprising a transition deformation shell having a leather inlet and a leather outlet and capable of automatically hemming a single-layer leather strip, and a leather guide mechanism provided outside the leather inlet of the transition deformation shell and used for introducing the leather strip into the transition deformation shell, characterized in that: The leather material guiding mechanism comprises a frame body fixedly connected to the transition deformation shell, and a plurality of guide rods rotatably mounted on the frame body and arranged at intervals, and the leather material strips sequentially pass through the plurality of guide rods; The frame includes two mounting strips fixedly connected to the transition deformation shell, the two mounting strips are respectively located on both sides of the leather inlet of the transition deformation shell, the distance between the two mounting strips matches the width of the leather strips, and the two ends of the guide rod are respectively rotatably connected to the two mounting strips.

2. The sewing and hemming tool for the headrest leather decorative strip according to claim 1, characterized in that: The guide rods extend along the width direction of the leather strip, and a plurality of the guide rods are arranged in a straight line at intervals and in parallel.

3. The sewing and hemming tool for the headrest leather decorative strip according to claim 1, characterized in that: A notch groove is provided on the side surface of the transition deformation shell.

4. The sewing and hemming tool for the headrest leather decorative strip according to claim 1, characterized in that: A connecting plate with a connecting hole is welded on the outer side of the transition deformation shell, and a fastening bolt passes through the connecting hole and is threadedly connected to the sewing machine operating table.

5. The sewing and hemming tool for the headrest leather decorative strip according to claim 4, characterized in that: A guide block located at the opposite side of the connecting plate is fixedly connected to the operating table of the sewing machine, and a guide channel for outputting the leather material after folding is formed between the guide block and the connecting plate.

6. A sewing and hemming tool for a headrest leather decorative strip according to any one of claims 1 to 5, characterized in that: The leather inlet of the transition deformation shell is in the shape of a vertical first strip opening, and the leather outlet of the transition deformation shell is in the shape of a horizontal second strip opening. The length and width of the first strip opening are respectively adapted to the width and thickness of the leather strip, and the length of the second strip opening is smaller than the first strip opening. The middle part of the transition deformation shell gradually transitions and deforms from the vertical first strip opening shape to the horizontal second strip opening shape.

7. The sewing and hemming tool for the headrest leather decorative strip according to claim 6, characterized in that: The length of the second strip-shaped opening is adapted to half the width of the leather strip.

8. A sewing and hemming tool for a headrest leather decorative strip according to any one of claims 1 to 5, characterized in that: The leather inlet of the transition deformation shell is in the shape of a third transverse strip opening, and the leather outlet of the transition deformation shell is in the shape of a fourth transverse strip opening. The length and width of the third strip opening are adapted to the leather strip, the length of the fourth strip opening is smaller than the length of the third strip opening, and the width of the fourth strip opening is larger than the width of the third strip opening. The middle part of the transition deformation shell gradually transitions and deforms from the third transverse strip opening to the fourth transverse strip opening.

9. The sewing and hemming tool for the headrest leather decorative strip according to claim 8, characterized in that: The length of the fourth strip-shaped opening is less than 1 / 2 of the width of the leather strip and greater than 1 / 3 of the width of the leather strip.

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