Sewing device for fabric sewing operation

Abstract

The utility model discloses a sewing device for fabric sewing operation, which comprises a sewing box body, a supporting piece and a shearing mechanism, the supporting piece is provided with a directional end, the directional end is used for controlling the height of a formed chain stitch, the shearing plane of the shearing mechanism is arranged along the vertical direction, and an included angle is formed between the shearing plane of the shearing mechanism and the vertical plane of the directional end; and the range of the included angle is 0-10 degrees. When the included angle is 0 degree, the shearing plane of the shearing mechanism is parallel to the vertical plane where the directional end is located. The shearing plane of the shearing mechanism and the vertical plane where the directional end is located are arranged in parallel or form an included angle smaller than or equal to 10 degrees, so that the shearing mechanism shears a suture from the axial direction of the directional end or the direction with a small-angle inclination angle with the axial direction of the directional end; therefore, the cutting is clean and neat, the occurrence of thread residue is reduced, and the tidiness and quality of produced fabrics such as socks and the like are also greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sock toe sewing machines, in particular to a toe sewing device used for fabric toe sewing operations. Background Art

[0002] Toe sewing is the last step in the sock knitting process. It is to sew the toe part of the finished socks that has not yet been closed. The traditional method usually requires sewing on a toe sewing machine. The existing one-piece sock machine is provided with two parts: a knitting device and a toe sewing device. After knitting, the socks can be transferred to the toe sewing device for direct sewing. The existing toe sewing device is provided with a toe sewing box and a sewing component and a shearing component respectively installed on the toe sewing box. The sewing component includes a seam maker, a seam needle and a support, wherein the seam maker and the seam needle move relative to each other and form a chain stitch according to the moving direction of the knitted fabric. The support is used to control the height of the formed chain stitch. The supporting direction of the support is the generation direction of the chain stitch. The shearing component is used to cut off the chain stitch.

[0003] The shearing component of the existing seam head device (for example, the patent document with authorization announcement number CN102046873B) is arranged between the seam maker bracket and the seam needle bracket. The shearing component includes a group of movable knives in the shape of scissors and with complementary blades. When the suture needs to be cut, the movable knife group moves to the end of the support member and performs cutting operation between the seam maker and the seam needle, that is, the cutting plane of the movable knife group is roughly perpendicular to the stitch direction of the sewing chain stitch.

[0004] The existing shearing components are located in a relatively narrow position, which is not convenient for installation. At the same time, the operating space of the shearing components is limited during cleaning and maintenance, which increases the difficulty and time consumption of maintenance to a certain extent. Utility Model Content

[0005] The utility model aims at overcoming at least one of the above problems and provides a seaming device for fabric seaming operation.

[0006] The technical solution adopted by the utility model is as follows:

[0007] The present application provides a sewing device for sewing fabrics, comprising a sewing mechanism for completing chain stitches and a shearing mechanism for cutting sutures, wherein the sewing mechanism comprises a sewing box and a supporting member installed on the sewing box.

[0008] The support member has a directional end, the directional end is used to assist in forming a weaving chain stitch and to support the formed weaving chain stitch,

[0009] The shearing plane of the shearing mechanism is arranged along the vertical direction and forms an angle with the vertical plane where the directional end is located, and the angle ranges from 0° to 10°. When the angle is 0°, the shearing plane of the shearing mechanism is arranged parallel to the vertical plane where the directional end is located.

[0010] The seam head device provided by the present application makes the shearing plane of the shearing mechanism parallel to the vertical plane where the directional end is located or forms an angle of less than or equal to 10°, so that the shearing mechanism shears the weaving chain from the axial direction of the directional end or from a direction with a small angle to the axial direction of the directional end. At the same time, the seam head device performs the sewing operation from the side end of the seam head mechanism. When the shearing plane changes, the shearing mechanism can perform the shearing operation from the side end of the seam head mechanism, which is convenient for the installation, disassembly, cleaning and maintenance of the shearing mechanism.

[0011] During actual use, the sewing machine and the sewing needle move relative to each other and form chain stitches according to the moving direction of the woven fabric. The support is used to control the height of the formed chain stitches. The support also includes a mounting end connected to the directional end, and the mounting end is used to mount the support on the seam head box of the seam head mechanism.

[0012] Furthermore, the seaming mechanism also includes a seaming needle, which is used to perform a seaming operation on the fabric to form a chain stitch, and the seaming needle includes a seaming device and a seaming needle;

[0013] The vertical plane where the seam former is located coincides with or is parallel to the vertical plane where the directional end is located;

[0014] The vertical plane where the sewing needle is located is perpendicular to the vertical plane where the directional end is located.

[0015] Further, the shearing mechanism includes a shearing frame, a fixed knife, a movable knife and a first driving assembly;

[0016] The fixed knife is installed on the shearing frame;

[0017] The movable knife is connected to the first driving assembly, and the first driving assembly is used to drive the movable knife to move;

[0018] The inner surface of the movable knife fits the inner surface of the fixed knife, and a cutting edge is formed on the movable knife. When the first driving assembly drives the movable knife to move toward the fixed knife, the cutting edge of the movable knife cooperates with the fixed knife to achieve shearing.

[0019] Furthermore, a concave shearing notch is provided on the movable knife, the opening direction of the shearing notch is arranged along the horizontal direction, and the shearing notch is used to accommodate the suture to be sheared;

[0020] The cutting edge is arranged on the upper side wall of the shearing opening.

[0021] Furthermore, the shearing mechanism also includes a pressing spring.

[0022] The shear frame is formed with an installation channel arranged in a vertical direction, and the fixed knife, the movable knife and the pressing spring are respectively and sequentially arranged vertically in the installation channel.

[0023] The fixed knife is arranged on the side wall of the installation channel and fixed relatively to the side wall of the installation channel, the pressing spring sheet is pressed against the side wall of the installation channel away from the movable knife, both ends of the pressing spring sheet are bent end portions, and the two bent end portions are used to press against the movable knife to make the movable knife fit with the fixed knife, and under the action of the pressing spring sheet, the cutting edge of the movable knife cooperates with the fixed knife to achieve shearing.

[0024] The movable knife group in the prior art has a relatively large movement stroke when performing shearing movement, which causes the blade of the movable knife to be easily worn, resulting in the phenomenon of continuous shearing, which increases the scrap rate of the fabric. At the same time, the movable knife group with complementary blades is used for cutting operation, and in order to achieve the purpose of shearing, the matching accuracy requirements are relatively high, which greatly increases the production cost.

[0025] The present application realizes shearing by configuring the shearing mechanism into a structure in which a fixed knife, a movable knife and a pressing spring piece cooperate with each other. The movable knife is driven to move to the fixed knife by a first driving component. The shearing of the fabric can be achieved under the cooperation of the cutting edge and the fixed knife and the pre-tightening force of the pressing spring piece.

[0026] That is, the seam head device provided in the present application is provided with a pressing spring sheet so that the movable knife is subjected to a pre-tightening force, thereby greatly reducing the requirements for the moving knife's matching accuracy; by combining a shearing opening arranged in the horizontal direction and a shearing plane arranged parallel to or forming a small angle with the vertical plane where the directional end is located, the length of the cutting edge of the shearing mechanism used for shearing operations can be shortened, and the contact area between the cutting edge of the movable knife and the fixed knife is also reduced, thereby reducing the wear of the shearing mechanism and extending the service life of the movable knife.

[0027] Furthermore, a fourth groove is provided on one side where the fixed knife and the movable knife cooperate, and the fourth groove is used to reduce unnecessary contact surface between the fixed knife and the movable knife.

[0028] Furthermore, the pressing spring sheet is used to keep the inner surface of the movable knife in close contact with the inner surface of the fixed knife.

[0029] Furthermore, it also includes a limiting member, which is installed on the shearing frame;

[0030] The installation channel has openings at both ends;

[0031] The bottom of the shearing frame is provided with a first groove opening downward, a side wall of the first groove is connected with the installation channel, and a limiting space is formed between the bottom wall of the first groove and the limiting member;

[0032] The fixed knife is provided with a first limiting portion, and the pressing spring is provided with a second limiting portion.

[0033] When the fixed knife and the pressing spring sheet are arranged on the installation channel, the first limiting portion and the second limiting portion are located in the limiting space, so that the fixed knife and the pressing spring sheet are respectively kept relatively fixed with the shearing frame.

[0034] Furthermore, the limiting member is a screw, which is screwed on the first groove, and the above-mentioned limiting space is formed between the bottom wall of the first groove and the lower side surface of the nut.

[0035] Furthermore, a third groove is formed on the inner wall of the installation channel, and the third groove is arranged along the length direction of the installation channel so that the cross section of the installation channel is stepped, and the side of the fixed knife is clamped in the third groove.

[0036] Furthermore, the first driving assembly includes a telescopic element, a flat plate and a support rod;

[0037] The fixed end of the telescopic element and the support rod are respectively fixed to the shear frame;

[0038] The middle part of the flat pressing plate is hingedly arranged on the support rod, and the two ends of the flat pressing plate are respectively a first end and a second end, the first end is hingedly connected to the movable knife, and the telescopic end of the telescopic element is located below the second end of the flat pressing plate;

[0039] When the telescopic end of the telescopic element extends toward the side close to the flat pressing plate and lifts the second end upward, the first end of the flat pressing plate drives the movable knife to move toward the side close to the fixed knife to achieve shearing.

[0040] Furthermore, the first driving assembly further comprises an elastic reset member, and two ends of the elastic reset member are respectively arranged on the second end of the flat pressing plate and the shearing frame;

[0041] When the second end of the flat pressing plate is lifted upward, the elastic reset member is in a stretched state;

[0042] When the telescopic end of the telescopic element is retracted, the second end of the flat pressing plate is restored to a non-lifted state under the action of the elastic reset member.

[0043] Furthermore, the first end of the flattening plate is in an arc-shaped structure, a second groove is provided on the movable knife, and the first end of the arc-shaped structure is embedded in the second groove with a gap.

[0044] Furthermore, the shearing mechanism also includes a moving assembly, which is used to move the shearing mechanism to a position where the yarn needs to be sheared, and the moving assembly includes a supporting seat, a connecting block, a slide rail, a slider, and a second driving assembly;

[0045] The slider is slidably arranged on the slide rail, the slide rail is mounted on the support seat, and the support seat is used to be fixed on the seam head box;

[0046] One end of the connecting block is fixed to the slider, and the other end is used to be fixed to the shear frame;

[0047] The second driving component is connected to the slider, and the second driving component is used to drive the slider to slide on the slide rail.

[0048] Furthermore, the second driving assembly is a cylinder assembly, a cylinder body of the cylinder assembly is mounted on the support seat, and a telescopic rod of the cylinder assembly is connected to the slider or the connecting block;

[0049] Alternatively, the second driving assembly is a screw nut module, a nut seat of the screw nut module is installed on the supporting seat, and the screw of the screw nut module is connected to the slider or the connecting block.

[0050] The shearing mechanism provided in the present application is conveniently installed on the side end of the seam head device through a movable component, rather than being arranged between the seam forming device bracket and the seam forming needle bracket, so that the cleaning and maintenance of the shearing mechanism are more convenient.

[0051] The beneficial effects of the utility model are:

[0052] (1) The seam head device provided by the present application makes the shearing plane of the shearing mechanism parallel to the vertical plane where the directional end is located or forms an angle of less than or equal to 10°, so that the shearing mechanism shears the weaving chain from the axial direction of the directional end or from a direction with a small angle to the axial direction of the directional end. At the same time, the seam head device performs the sewing operation from the side end of the seam head mechanism. When the shearing plane changes, the shearing mechanism can perform the shearing operation from the side end of the seam head mechanism, which is convenient for the installation, disassembly, cleaning and maintenance of the shearing mechanism.

[0053] (2) The seam head device provided in the present application is provided with a pressing spring sheet so that the movable knife is subjected to a pre-tightening force, thereby greatly reducing the requirements for the matching accuracy of the movable knife; by combining the shearing opening arranged in the horizontal direction and the shearing plane arranged parallel to or forming a small angle with the vertical plane where the directional end is located, the length of the cutting edge of the shearing mechanism used for shearing operations can be shortened, and the contact area between the cutting edge of the movable knife and the fixed knife is also reduced, thereby reducing the wear of the shearing mechanism and extending the service life of the movable knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the axial structure of the shearing mechanism of the embodiment of the utility model;

[0055] Figure 2 yes Figure 1 A is a schematic diagram of the partially enlarged structure of the middle part;

[0056] Figure 3 This is a schematic diagram of the structure of the shearing mechanism of the utility model in a top view;

[0057] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA;

[0058] Figure 5 This is another axial structural schematic diagram of the shearing mechanism of the embodiment of the utility model;

[0059] Figure 6 This is a schematic diagram of the axial structure of the shear frame of the utility model embodiment;

[0060] Figure 7 yes Figure 6 A schematic diagram of the partially enlarged structure of B in the middle;

[0061] Figure 8 It is a schematic diagram of the axial structure of the pressing spring sheet in the embodiment of the utility model;

[0062] Fig. 9 This is a schematic diagram of the shaft side structure of the movable knife in the embodiment of the utility model;

[0063] Fig.10 This is a schematic diagram of the axial structure of the fixed knife in the embodiment of the utility model;

[0064] Fig.11 This is a schematic diagram of the axial structure of the seam head device of the utility model embodiment;

[0065] Fig.12 yes Fig.11 Schematic diagram of the partially enlarged structure of C in the middle.

[0066] The reference numerals in the figures are:

[0067] 10, shearing frame; 110, mounting channel; 111, third groove; 120, first groove; 130, limiting space; 20, fixed knife; 210, first limiting part; 220, fourth groove; 30, moving knife; 310, shearing cut; 311, cutting edge; 312, fifth groove; 320, second groove; 40, first driving assembly; 410, telescopic element; 420, flat plate; 421, first end; 422, second end; 430, support Support rod; 440, elastic reset member; 50, pressing spring; 510, bending end; 520, second limiting portion; 60, limiting member; 70, moving assembly; 710, supporting seat; 720, connecting block; 730, slide rail; 740, slider; 750, second driving assembly; 100, shearing mechanism; 201, sewing machine; 202, sewing needle; 203, sewing head box; 204, supporting member; 2041, directional end; 205, shearing plane. DETAILED DESCRIPTION

[0068] The utility model is described in detail below in conjunction with the accompanying drawings.

[0069] Example 1

[0070] like Figures 1 to 12 As shown, the present application provides a sewing device for sewing fabrics, including a sewing mechanism for completing chain stitches and a shearing mechanism 100 for cutting off sutures, the sewing mechanism including a sewing box 203 and a support 204 mounted on the sewing box, the support 204 having a directional end 2041, the directional end 2041 is used to assist in forming a woven chain stitch and support the formed woven chain stitch,

[0071] The shearing plane 205 of the shearing mechanism 100 is arranged along the vertical direction and forms an angle of 0° with the vertical plane where the directional end 2041 is located. That is, the shearing plane 205 of the shearing mechanism 100 is arranged parallel to the vertical plane where the directional end 2041 is located.

[0072] In the present application, the vertical plane where the directional end 2041 is located refers to the vertical plane where the outer side wall of the directional end 2041 is located when the support member 204 is arranged in the longitudinal direction.

[0073] The seam head device provided by the present application is arranged in parallel with the shearing plane 205 of the shearing mechanism 100 and the vertical plane where the directional end 2041 is located, or forms an angle of less than or equal to 10°, so that the shearing mechanism shears the weaving chain from the axial direction of the directional end 2041 or from a direction with a small angle to the axial direction of the directional end 2041. At the same time, the seam head device performs the sewing operation from the side end of the seam head mechanism. When the shearing plane 205 is changed, the shearing mechanism can perform the shearing operation from the side end of the seam head mechanism, which is convenient for the installation, disassembly, cleaning and maintenance of the shearing mechanism.

[0074] In other embodiments, an angle is formed between the shearing plane 205 of the shearing mechanism 100 and the vertical plane where the directional end 2041 is located, and the angle is greater than 0° and less than or equal to 10°.

[0075] In this embodiment, the seaming device further includes a seaming needle, which is used to perform the seaming operation of the fabric to form a chain stitch, and the seaming needle includes a vertically arranged seam forming device 201 and a seam forming needle 202;

[0076] The vertical plane where the seam former 201 is located coincides with or is parallel to the vertical plane where the directional end 2041 is located;

[0077] The vertical plane where the suture needle 202 is located is perpendicular to the vertical plane where the directional end 2041 is located.

[0078] That is, in this embodiment, the vertical plane where the seam former 201 is located coincides with or is parallel to the shear plane 205;

[0079] The vertical plane where the suture needle 202 is located is perpendicular to the shear plane 205 .

[0080] like Figures 1 to 10 As shown, the shearing mechanism 100 includes a shearing frame 10, a fixed knife 20, a movable knife 30 and a first driving assembly 40;

[0081] The fixed knife 20 is mounted on the shearing frame 10;

[0082] The movable knife 30 is connected to the first driving assembly 40, and the first driving assembly 40 is used to drive the movable knife 30 to move;

[0083] The inner surface of the movable knife 30 fits the inner surface of the fixed knife 20. A cutting edge 311 is formed on the movable knife 30. When the first driving assembly 40 drives the movable knife 30 to move toward the fixed knife 20, the cutting edge 311 of the movable knife 30 cooperates with the fixed knife 20 to achieve shearing.

[0084] In actual use, the contact surface between the inner surface of the movable knife 30 and the inner surface of the fixed knife 20 is the shear plane 205 .

[0085] In this embodiment, a concave cutting notch 310 is provided on the movable knife 30, and the opening direction of the cutting notch 310 is arranged along the horizontal direction, and the cutting notch 310 is used to accommodate the suture to be cut;

[0086] The cutting edge 311 is disposed on the upper side wall of the shearing opening 310 .

[0087] In this embodiment, a fifth groove 312 communicating with the shearing opening 310 is disposed on the movable knife 30 . The fifth groove 312 is disposed below the cutting edge 311 . The fifth groove 312 is used to prevent the weaving thread from being stuck during shearing.

[0088] like Figure 1 and Figure 4 As shown, in this embodiment, the shearing mechanism 100 further includes a pressing spring 50.

[0089] The shear frame 10 is formed with an installation channel 110 arranged along the vertical direction. The fixed knife 20, the movable knife 30 and the pressing spring 50 are respectively and sequentially arranged vertically in the installation channel 110.

[0090] The fixed knife 20 is arranged on the side wall of the installation channel 110 and fixed relative to the side wall of the installation channel 110. The pressing spring sheet 50 is pressed against the side wall of the installation channel 110 away from the movable knife 30. The two ends of the pressing spring sheet 50 are bent end portions 510. The two bent end portions 510 are used to press against the movable knife 30 to make the movable knife 30 fit with the fixed knife 20.

[0091] By setting the pressing spring piece 50, the movable knife 30 is subjected to the effect of pre-tightening force, thereby greatly reducing the matching accuracy requirement of the movable knife 30; by combining the shearing opening 310 set in the horizontal direction and the shearing plane 205 set parallel to or forming a small angle with the vertical plane where the directional end 2041 is located, the length of the cutting edge of the shearing mechanism 100 used for shearing operations can be shortened, and the contact area between the cutting edge of the movable knife 30 and the fixed knife 20 is also reduced, thereby reducing the wear of the shearing mechanism and extending the service life of the movable knife 30.

[0092] In actual use, the fixed knife 20 can be integrally formed with the shearing frame 10 .

[0093] In this embodiment, a fourth groove 220 is further provided on one side where the fixed knife 20 and the movable knife 30 cooperate. The fourth groove 220 is used to reduce unnecessary contact surface between the fixed knife 20 and the movable knife 30 .

[0094] In this embodiment, the pressing spring piece 50 is used to keep the inner surface of the movable knife 30 and the inner surface of the fixed knife 20 in close contact.

[0095] like Figures 5 to 10 As shown, in this embodiment, a limiting member 60 is also included, and the limiting member 60 is installed on the shear frame 10;

[0096] The installation channel 110 is open at both ends;

[0097] A first groove 120 opening downward is provided at the bottom of the shear frame 10, a side wall of the first groove 120 is connected to the installation channel 110, and a limiting space 130 is formed between the bottom wall of the first groove 120 and the limiting member 60;

[0098] The fixed blade 20 is provided with a first limiting portion 210, and the pressing spring sheet 50 is provided with a second limiting portion 520.

[0099] When the fixed knife 20 and the pressing spring sheet 50 are arranged on the installation channel 110 , the first limiting portion 210 and the second limiting portion 520 are located in the limiting space 130 , so that the fixed knife 20 and the pressing spring sheet 50 are kept relatively fixed to the shearing frame 10 .

[0100] In this embodiment, the limiting member 60 is a screw, which is screwed on the first groove 120 , and the limiting space 130 is formed between the bottom wall of the first groove 120 and the lower side of the nut.

[0101] like Figure 6 and Figure 7 As shown, in this embodiment, a third groove 111 is further formed on the inner wall of the mounting channel 110 , and the third groove 111 is arranged along the length direction of the mounting channel 110 so that the cross-section of the mounting channel 110 is stepped, and the side of the fixed knife 20 is clamped in the third groove 111 .

[0102] In this embodiment, the first driving assembly 40 includes a telescopic element 410 , a flat plate 420 , and a support rod 430 ;

[0103] The fixed end of the telescopic element 410 and the support rod 430 are respectively fixed to the shear frame 10;

[0104] The middle part of the flat pressing plate 420 is hingedly arranged on the support rod 430, and the two ends of the flat pressing plate 420 are respectively a first end 421 and a second end 422, the first end 421 is hingedly connected to the movable knife 30, and the telescopic end of the telescopic element 410 is located below the second end 422 of the flat pressing plate 420;

[0105] When the telescopic end of the telescopic element 410 extends toward the side close to the flat plate 420 and lifts the second end 422 upward, the first end 421 of the flat plate 420 drives the movable knife 30 to move toward the side close to the fixed knife 20 to achieve shearing.

[0106] In this embodiment, the first driving assembly 40 further includes an elastic reset member 440, and two ends of the elastic reset member 440 are respectively disposed on the second end 422 of the flat pressing plate 420 and the shear frame 10;

[0107] When the second end 422 of the flat pressing plate 420 is lifted upward, the elastic reset member 440 is in a stretched state;

[0108] When the telescopic end of the telescopic element 410 is retracted, the second end 422 of the flat pressing plate 420 is restored to a non-lifted state under the action of the elastic return member 440 .

[0109] In this embodiment, the elastic reset member 440 is a tension spring, and a mounting shaft is provided on the shear frame 10 . One end of the tension spring is connected to the mounting through the mounting shaft, and the other end is fixed to the second end 422 of the flat pressing plate 420 .

[0110] In actual use, the telescopic end of the telescopic element 410 can be fixed to the second end 422 of the flat pressing plate 420 , and the second end 422 of the flat pressing plate 420 can be lifted and reset by telescoping the telescopic end of the telescopic element 410 .

[0111] In this embodiment, the first end 421 of the flat plate 420 is an arc-shaped structure, the movable knife 30 is provided with a second groove 320 , and the first end 421 of the arc-shaped structure is embedded in the second groove 320 with a gap.

[0112] In this embodiment, the shearing mechanism 100 further includes a moving assembly 70, which is used to move the shearing mechanism 100 to a position where the yarn needs to be sheared. The moving assembly 70 includes a support seat 710, a connecting block 720, a slide rail 730, a slider 740 and a second driving assembly 750;

[0113] The slider 740 is slidably disposed on the slide rail 730, and the slide rail 730 is mounted on the support seat 710. The support seat 710 is used to fix the shearing mechanism 100 on the seam head box 203;

[0114] One end of the connecting block 720 is fixed to the slider 740, and the other end is used to be fixed to the shear frame 10;

[0115] The second driving assembly 750 is connected to the slider 740 , and is used to drive the slider 740 to slide on the slide rail 730 .

[0116] In this embodiment, the second driving assembly 750 is a cylinder assembly, the cylinder body of the cylinder assembly is installed on the support seat 710, and the telescopic rod of the cylinder assembly is connected to the slider 740 or the connecting block 720;

[0117] In other embodiments, the cylinder assembly may also be configured as an electric push rod assembly structure.

[0118] Example 2

[0119] The difference between this embodiment and embodiment 1 is that, in this embodiment, the second driving assembly is a screw nut module, the nut seat of the screw nut module is installed on the supporting seat, and the screw of the screw nut module is connected to the slider or the connecting block.

[0120] Alternatively, a nut seat is used instead of the slider, and a lead screw is used instead of the slide rail. One end of the connecting block is fixed to the nut seat, and the other end is used to fix to the shear frame. When the lead screw rotates, the shear frame is displaced relative to the lead screw under the drive of the nut seat.

[0121] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A sewing device for sewing fabrics, comprising a sewing mechanism for completing a chain stitch and a shearing mechanism for cutting off the stitches, the sewing mechanism comprising a sewing box and a supporting member mounted on the sewing box, the supporting member having a directional end, the directional end being used to control the height of the formed chain stitch, It is characterized in that The shearing plane of the shearing mechanism is arranged along the vertical direction and forms an angle with the vertical plane where the directional end is located, and the range of the angle is between 0° and 10°.

2. A seaming device for fabric seaming according to claim 1, characterized in that: The seaming mechanism also includes a seaming needle, which is used to perform a seaming operation on the fabric to form a chain stitch, and the seaming needle includes a seaming device and a seaming needle; The vertical plane where the seam former is located coincides with or is parallel to the vertical plane where the directional end is located; The vertical plane where the sewing needle is located is perpendicular to the vertical plane where the directional end is located.

3. A seaming device for fabric seaming according to claim 1, characterized in that: The shearing mechanism comprises a shearing frame, a fixed knife, a movable knife and a first driving assembly; The fixed knife is installed on the shearing frame; The movable knife is connected to the first driving assembly, and the first driving assembly is used to drive the movable knife to move; The inner surface of the movable knife fits the inner surface of the fixed knife, and a cutting edge is formed on the movable knife. When the first driving assembly drives the movable knife to move toward the fixed knife, the cutting edge of the movable knife cooperates with the fixed knife to achieve shearing.

4. A seaming device for fabric seaming as claimed in claim 3, characterized in that: The movable knife is provided with a concave shearing notch, the opening direction of the shearing notch is arranged along the horizontal direction, and the shearing notch is used to accommodate the suture to be sheared; The cutting edge is arranged on the upper side wall of the shearing opening.

5. A seaming device for fabric seaming as claimed in claim 3, characterized in that: The shearing mechanism also includes a pressing spring. The shear frame is formed with an installation channel arranged in a vertical direction, and the fixed knife, the movable knife and the pressing spring are respectively and sequentially arranged vertically in the installation channel. The fixed knife is arranged on the side wall of the installation channel and fixed relative to the side wall of the installation channel, the pressing spring sheet is pressed against the side wall of the installation channel away from the movable knife, and both ends of the pressing spring sheet are bent end portions, and the two bent end portions are used to press against the movable knife to make the movable knife fit with the fixed knife.

6. A seaming device for fabric seaming as claimed in claim 5, characterized in that: It also includes a limiting member, which is installed on the shearing frame; The installation channel has openings at both ends; The bottom of the shearing frame is provided with a first groove opening downward, a side wall of the first groove is connected with the installation channel, and a limiting space is formed between the bottom wall of the first groove and the limiting member; The fixed knife is provided with a first limiting portion, and the pressing spring is provided with a second limiting portion. When the fixed knife and the pressing spring sheet are arranged on the installation channel, the first limiting portion and the second limiting portion are located in the limiting space, so that the fixed knife and the pressing spring sheet are respectively kept relatively fixed with the shearing frame.

7. A seaming device for fabric seaming as claimed in claim 3, characterized in that: The first driving assembly includes a telescopic element, a flat plate and a support rod; The fixed end of the telescopic element and the support rod are respectively fixed to the shear frame; The middle part of the flat pressing plate is hingedly arranged on the support rod, and the two ends of the flat pressing plate are respectively a first end and a second end, the first end is hingedly connected to the movable knife, and the telescopic end of the telescopic element is located below the second end of the flat pressing plate; When the telescopic end of the telescopic element extends toward the side close to the flat plate and lifts the second end upward, the first end of the flat plate drives the movable knife to move toward the side close to the fixed knife to achieve shearing; The first driving assembly further comprises an elastic reset member, and two ends of the elastic reset member are respectively arranged on the second end of the flat pressing plate and the shearing frame; When the second end of the flat pressing plate is lifted upward, the elastic reset member is in a stretched state; When the telescopic end of the telescopic element is retracted, the second end of the flat pressing plate is restored to a non-lifted state under the action of the elastic reset member.

8. A seaming device for fabric seaming as claimed in claim 7, characterized in that: The first end of the flattening plate is in an arc-shaped structure, the movable knife is provided with a second groove, and the first end of the arc-shaped structure is embedded in the second groove with a gap.

9. A seaming device for fabric seaming as claimed in claim 3, characterized in that: The shearing mechanism further comprises a moving assembly, which is used to move the shearing mechanism to a position where the thread needs to be sheared, and the moving assembly comprises a supporting seat, a connecting block, a slide rail, a slider and a second driving assembly; The slider is slidably arranged on the slide rail, the slide rail is mounted on the support seat, and the support seat is used to be fixed on the seam head box; One end of the connecting block is fixed to the slider, and the other end is used to be fixed to the shear frame; The second driving component is connected to the slider, and the second driving component is used to drive the slider to slide on the slide rail.

10. A seaming device for fabric seaming according to claim 9, characterized in that: The second driving assembly is a cylinder assembly, a cylinder body of the cylinder assembly is mounted on the support seat, and a telescopic rod of the cylinder assembly is connected to the slider or the connecting block; Alternatively, the second driving assembly is a screw nut module, a nut seat of the screw nut module is installed on the supporting seat, and the screw of the screw nut module is connected to the slider or the connecting block.

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