Chain belt with expansion cloth belt and non-continuous sewing threads and sewing equipment for manufacturing chain belt with expansion cloth belt and non-continuous sewing threads

Abstract

The utility model relates to the technical field of zippers, in particular to a zipper belt with a non-continuous sewing expansion cloth belt and sewing equipment for manufacturing the zipper belt, during working, a basic cloth belt to be sewn and the expansion cloth belt synchronously and continuously pass through a sewing mechanism under the action of a belt dragging mechanism, and the sewing mechanism sews and fixes the passing expansion cloth belt on the side portion of the basic cloth belt. The method comprises the following steps: sewing a base cloth belt with a preset length, stopping for a preset time after sewing the base cloth belt with the preset length, then starting sewing the base cloth belt with the preset length, and repeating the steps, so that the produced expansion cloth belt is along the length direction of the base cloth belt: sewing lines between the expansion cloth belt and the base cloth belt are arranged in a sectional manner, and local sections of the expansion cloth belt are separated from the base cloth belt in a non-sewing manner. In this way, when goods are supplied to an application manufacturer, the application manufacturer only needs to cut off the expansion cloth belt which is not sewed and fixed at the non-sewed position of the expansion cloth belt, the procedure of unsewed threads is omitted, time and labor are saved, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to zip fastener technical field, concretely relates to a chain belt of non -continuous sewing thread of capacity expansion cloth tape and sewing equipment for manufacturing it.

[0002] CLAIM OF PRIORITY

[0003] The present application claims priority to the Chinese patent application No. 2024210591064, filed on May 15, 2024, entitled "Chain belt with non-continuous sewing thread and sewing equipment for manufacturing the same", the entire content of which is incorporated herein by reference. BACKGROUND

[0004] The Chinese patent document with the publication number CN215014105U discloses a double-row telescopic surrounding zipper that can be quickly sewn, which includes left chain, middle chain and right chain arranged side by side, and single chain is arranged on one side of the left chain and the right chain, and double chain is arranged on both sides of the middle chain; the left chain is connected with one side chain of the middle zipper through a first zipper head, and the right chain is connected with the other side chain of the middle zipper through a second zipper head; it further includes a telescopic surrounding barrier, one end of which is connected with the middle chain, and the other end is connected with the right chain; the zipper provided with the telescopic surrounding barrier and the ordinary zipper are sewn together to form a double-row telescopic surrounding zipper, which ensures that when the zipper is installed on the trolley case later, only one-time sewing is needed to complete the installation of the zipper, which saves the process flow and effectively reduces the production cost.

[0005] For example, the Chinese patent document with the publication number CN220824035U discloses a zipper cloth tape supporting a hidden connection area, which includes a first cloth tape, a second cloth tape and a third cloth tape; the first cloth tape and the second cloth tape are connected through a closed zipper on opposite sides; the second cloth tape and the third cloth tape are connected with a capacity expansion cloth tape on the same surface, the main body of the capacity expansion cloth tape is placed between the second cloth tape and the third cloth tape, the opposite sides of the second cloth tape and the third cloth tape are provided with a capacity expansion zipper, and the capacity expansion zipper is closed to connect the second cloth tape and the third cloth tape and make the two sides of the capacity expansion cloth tape bend towards the box shell edge; it is not difficult to understand that the first cloth tape and the second cloth tape are closed and separated to realize the opening and closing of the travel case, and the second cloth tape and the third cloth tape are used to make the capacity expansion cloth tape unfold to form a straight and relaxed state, thereby improving the accommodating capacity of the box shell.

[0006] In the field of zipper technology, the ecological chain of upstream and downstream is as follows: the zipper manufacturer produces super-long combination zipper tape (i.e. the side edges of the expansion tape are stacked on the same side of two base tapes (with teeth on the adjacent side edges), and then the two side edges of the expansion tape are sewn in the middle of the two base tapes by a sewing machine), and the combination zipper tape of tens of meters or even more than 100 meters in length is supplied to downstream application manufacturers, such as bag manufacturers and clothing manufacturers. Taking a bag manufacturer as an example, the manufacturer cuts a combination zipper tape segment of a corresponding length according to the length of the expansion side of the bag, and then sews the two side edges of the base tape of the combination zipper tape, which do not have teeth, to the two sides of the expansion port of the bag.

[0007] The existing technology has the technical problem that, during the production of the combination zipper tape, the existing sewing machine can only work continuously, i.e. the expansion tape is continuously sewn to the side of the base tape from the beginning to the end along the length direction of the base tape. Therefore, when the downstream bag manufacturer applies the combination zipper tape, the expansion tape of the combination zipper tape segment cut out is sewn to the entire segment from the beginning to the end along the base tape segment. However, according to the production needs, the two ends of the base tape of the combination zipper tape segment cut out need to be reserved without the expansion tape to be hiddenly sewn to the bag. Therefore, the bag manufacturer needs to remove the expansion tape at the two ends of the combination zipper tape segment cut out, and the existing technology is to manually cut off the sewing thread corresponding to the expansion tape outside and then cut off the corresponding expansion tape, which is time-consuming and laborious, and extremely inconvenient to operate, thereby reducing the production efficiency of the application manufacturer. SUMMARY

[0008] In view of all or part of the above technical problems existing in the prior art, the utility model provides a combination zipper tape with non-continuous sewing and a sewing machine for manufacturing the same.

[0009] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0010] The utility model provides a combination zipper tape with non-continuous sewing, which comprises an expansion tape and two base tapes, and the opposite sides of the two base tapes are provided with an openable and closable expansion zipper, characterized in that: the two sides of the expansion tape are fixed to the two base tapes by segmented sewing, the segmented sewing comprises a plurality of sewing segments and a plurality of separation segments which are not sewn and are kept separated, the plurality of sewing segments and the plurality of separation segments are arranged in sequence and at intervals along a sewing track, and the separation segments on the two sides of the expansion tape correspond to each other.

[0011] As a further optional scheme, the separation segments on the two sides of the expansion tape are equal in length and arranged in alignment at the head and tail.

[0012] As a further optional scheme, the wire between the adjacent sewing segment and the separation segment is continuous.

[0013] As a further optional solution, the side away from the expansion zipper of one of the base cloth belts is further provided with an opening and closing side cloth belt, and the opening and closing side cloth belt is provided with an opening box zipper between the base cloth belt.

[0014] The application also provides a sewing device, characterized in that it comprises a sewing mechanism and a belt dragging mechanism, the sewing mechanism comprises a supporting table, and the belt dragging mechanism is used to drag the two base cloth belts and the expansion cloth belt to continuously and synchronously flow through the supporting table;

[0015] The upper portion of the supporting table is provided with a needle assembly, which comprises a needle holder, two groups of needle bodies arranged longitudinally and a sewing power member used to drive the needle holder to move up and down, the two groups of needle bodies are fixed to the needle holder and horizontally arranged in parallel and alignment, and correspond to the sewing track of the two side portions of the expansion cloth belt downward; the lower portion of the supporting table is provided with a thread hook assembly, which comprises two thread hook bodies corresponding to the two groups of needle bodies respectively and a thread hook driving member used to drive the thread hook bodies to move; the two groups of needle bodies and the two thread hook bodies are matched one by one to sew the two sides of the base cloth belt and the expansion cloth belt passing through each other;

[0016] It further comprises an electric control module electrically connected with the sewing power member and the thread hook driving member, so as to control the cyclic switching between a sewing state and a stop state, in the sewing state, the base cloth belt and the expansion cloth belt passing through are sewn and fixed to each other, and in the stop state, the sewing is stopped to separate the base cloth belt and the expansion cloth belt passing through each other without sewing.

[0017] As a further optional solution, it further comprises a needle protection mechanism, which comprises a needle protection block and a needle protection driving member, in the stop state, the needle protection driving member drives the needle protection block to resist the side portions of the two groups of needle bodies of the sewing mechanism, and the resisting direction is opposite to the dragging direction.

[0018] As a further optional solution, the belt dragging mechanism comprises a first belt dragging module and a second belt dragging module, both of which can drag the base cloth belt and the expansion cloth belt to move, and both of the first belt dragging module and the second belt dragging module are electrically connected with the electric control module, so as to control the start and stop of the first belt dragging module and the second belt dragging module.

[0019] As a further optional solution, the first belt dragging module is used to drag the base cloth belt and the expansion cloth belt in the sewing state, and the second belt dragging module is used to drag the base cloth belt and the expansion cloth belt in the stop state, and the dragging speed of the second belt dragging module is smaller than that of the first belt dragging module.

[0020] As a further optional solution, the first belt dragging module and the second belt dragging module respectively comprise an upper roller, a lower roller and a belt dragging driving member, the upper roller and the lower roller are arranged in parallel and above and below each other, and a gap is left between them for the base cloth belt and the expansion cloth belt to pass through, the belt dragging driving member is electrically connected with the electric control module and is used to drive the upper roller and / or the lower roller to rotate, so that the upper roller and the lower roller jointly clamp the base cloth belt and the expansion cloth belt to move; the gap between the upper roller and the lower roller is adjustable.

[0021] As a further optional solution, the upper roller is longitudinally elastically floatingly arranged to elastically press against the top surface of the base tape and the expansion tape; the upper roller and / or the lower roller is circumferentially provided with a slot for the expansion zipper to pass through.

[0022] The utility model discloses the beneficial effects of:

[0023] The utility model discloses a kind of expansion tape non-continuous sewing line's chain belt and the sewing equipment for manufacturing it, when working, the base tape and expansion tape to be sewn are synchronously continuously passed through sewing mechanism under the action of drag belt mechanism, sewing mechanism fixes the side part of base tape by sewing the passing expansion tape, and after sewing preset length, stop for preset length, then start sewing preset length again, in this way cycle, expansion tape produced in this way is along the length direction of base tape: expansion tape and base tape between sewing line is arranged in section, and the local section of expansion tape is separated from base tape without sewing. When supplying to application manufacturer in this way, application manufacturer only needs to cut off at the non-sewing position of expansion tape, and expansion tape without sewing fixation can be cut off, sewing process is saved, time and energy are saved, and work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a structure schematic view of one kind of expansion tape non-continuous sewing line's chain belt in embodiment.

[0025] Figure 2 It is a structure schematic view of one kind of expansion tape non-continuous sewing line's chain belt in another embodiment.

[0026] Figure 3 It is a structure schematic view of sewing equipment in embodiment.

[0027] Figure 4 It is a structure schematic view of another view of sewing equipment in embodiment.

[0028] Figure 5 It is a structure schematic view of line hook assembly in embodiment.

[0029] Figure 6 It is a structure schematic view of second drag belt module in embodiment.

[0030] REFERENCE NUMERALS:

[0031] Base tape 01, expansion tape 02, expansion zipper 03, sewing section 04, separation section 05, opening and closing side tape 06, opening box zipper 07.

[0032] Sewing mechanism 1, supporting table 11, sewing needle assembly 12, needle seat 121, needle body 122, line hook assembly 13, line hook body 131;

[0033] Towing mechanism 2, first towing module 21, second towing module 22, upper roller 23, lower roller 24, let go slot 241, towing drive 25, support seat 26, floating seat 27, transition seat 28, spring 29, lifting mechanism 210;

[0034] Electric control module 3;

[0035] Needle protection mechanism 4, needle protection block 41, needle protection drive 42. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. In the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] The embodiment provides a chain belt of expanded non-continuous sewing tape, as shown in the drawing, Figure 1 The drawing shows that the chain belt comprises two base tapes 01 and an expanded tape 02, and the opposite sides of the two base tapes 01 are provided with openable and closable expansion zippers 03. The expansion zippers are opened to separate the two base tapes 01 and achieve expansion. The function of the expanded tape 02 is the same as that of the prior art, which is not described here. The two sides of the expanded tape 02 are fixed to the two base tapes 01 by segmented sewing lines. Specifically, the long side of the expanded tape 02 is sewn to the middle position of the base tape. The segmented sewing line comprises a plurality of sewing segments 04 for sewing the base tape 01 and the expanded tape 02, and a plurality of separation segments 05 for keeping the base tape 01 and the expanded tape 02 separated without sewing. The plurality of sewing segments 04 and the plurality of separation segments 05 are arranged in sequence and at intervals along the sewing track. The separation segments 05 on the two sides of the expanded tape 02 correspond to each other, that is, the separation segments 05 of the two sewing lines are aligned, locally aligned or completely aligned in the width direction of the tape, and preferably completely aligned. The wire between the adjacent sewing segment 04 and the separation segment 05 is continuous, that is, the sewing line is not cut, only the difference between sewing and non-sewing. The sewing segment 04 and the separation segment 05 in the drawing are only schematically shown, and their lengths are adjusted as needed.

[0038] Another embodiment of the chain belt is shown in the drawing, Figure 2 In which one side of the base tape 01 away from the expansion zipper 03 is also provided with an openable and closable side tape 06, and the openable and closable side tape 06 and the base tape 01 are provided with an openable and closable side tape 06. The openable and closable side tape 06 and the base tape 01 are provided with an openable and closable side tape 06. The openable and closable side tape 06 and the base tape 01 are provided with an openable and closable side tape 06.

[0039] The application also provides a sewing equipment, and the embodiment is described with reference to Figures 3 to 6As shown, including suture mechanism 1 and tow mechanism 2, suture mechanism 1 including support table 11, tow mechanism 2 for towed flat two base cloth tape 01 and expansion cloth tape 02 synchronous continuously through the support table 11, specifically the expansion zipper 03 is opened, two base cloth tape 01 is separated, two base cloth tape 01 is arranged separately horizontally, and the expansion cloth tape 02 is partially laminated on the top surface / bottom surface of the two base cloth tapes 01, so that the two side edges of the expansion cloth tape 02 are located in the middle of the two base cloth tapes 01.

[0040] The upper part of the support table 11 is provided with a needle assembly 12, which includes a needle holder 121, two groups of needle bodies 122 arranged longitudinally, and a sewing power element (not shown in the internal diagram) for driving the needle holder 121 to move up and down, the two groups of needle bodies 122 are fixed to the needle holder 121 and are horizontally arranged in parallel, corresponding to the sewing track of the two side parts of the expansion cloth tape 02, that is, the distance between the two groups of needle bodies 122 is less than the width of the expansion cloth tape 02 after being flattened. The lower part of the support table 11 is provided with a thread hook assembly 13, which includes two hook bodies 131 corresponding to the two groups of needle bodies 122 respectively and a hook driving element (not shown in the figure, which can be driven to swing or rotate by a motor or other structure) for driving the hook bodies 131 to move; when working, the two groups of needle bodies 122 pass through the needle hole of the support table 11 and the two hook bodies 131 one by one to match, so as to stitch and fix the two sides of the base cloth tape 01 and the expansion cloth tape 02 that pass through. The cooperation of the needle body 122 and the hook body 131 for sewing is a prior art. In practice, the two hook bodies 131 can be driven synchronously by the same power source, or can be driven independently by different power sources.

[0041] The sewing device also includes an electric control module 3 electrically connected to the sewing power element and the hook driving element, to control the cyclic switching between the sewing state and the stop state, in the sewing state, the base cloth tape 01 and the expansion cloth tape 02 segments passing through the support table 11 are stitched and fixed to each other, in the stop state, the sewing is stopped and the base cloth tape 01 and the expansion cloth tape 02 segments passing through the support table 11 are separated without being stitched to each other.

[0042] In this embodiment, in the stop state, although the needle body 122 stops sewing, the expansion cloth tape 02 and the base cloth tape 01 still pull the wire to continue to advance, in order to avoid bending and breaking the needle body 122, the device also includes a needle protection mechanism 4, which includes a needle protection block 41 and a needle protection driving element 42, the needle protection driving element 42 is electrically connected to the electric control module 3, in the stop state, the needle protection driving element 42 drives the needle protection block 41 to resist the side of the two groups of needle bodies 122, and the resistance direction is opposite to the tow direction, to avoid the needle body 122 from being bent and deformed or even broken. The needle protection driving element 42 can drive the needle protection block 41 to move horizontally, so that the needle protection block 41 moves away from the needle body 122 or moves close to resist the side of the two groups of needle bodies 122. Of course, in practice, two groups of needle protection mechanisms 4 can be provided to individually resist and protect the two groups of needle bodies 122.

[0043] In the embodiment, the dragging mechanism 2 comprises a first dragging module 21 and a second dragging module 22, both of which can drag the base tape 01 and the expansion tape 02 to move, and the first dragging module 21 and the second dragging module 22 are electrically connected to the electric control module 3 to select the first dragging module 21 and / or the second dragging module 22 to drag. Specifically, the first dragging module 21 is used to drag in the sewing state, and the second dragging module 22 is used to drag in the pause state, and the dragging speed of the second dragging module 22 is less than that of the first dragging module 21, so as to avoid bending the needle body 122 or breaking the wire.

[0044] Specifically, the first dragging module 21 and the second dragging module 22 respectively comprise an upper roller 23, a lower roller 24 and a dragging driving part 25, the upper roller 23 and the lower roller 24 are arranged in parallel and leave a gap for the base tape and the expansion tape to pass through, and the dragging driving part 25 is electrically connected to the electric control module 3 to drive the lower roller 24 to rotate, so that the upper roller 23 and the lower roller 24 jointly hold the base tape 01 and the expansion tape 02 to move; the height of the upper roller 23 is adjustable, so that the gap between the upper roller 23 and the lower roller 24 is adjustable to release the dragging of the base tape 01 and the expansion tape 02.

[0045] Specifically, the upper roller 23 is longitudinally elastically floatingly arranged to elastically press the top surface of the base tape 01 and the expansion tape 02; the lower roller 24 is circumferentially provided with a gap slot 241 for the expansion zipper 03 to embed and pass through, which plays a guiding and gap-providing role. Since the two chains of the expansion zipper 03 are separated during sewing, the number of gap slots 241 is two for the two parallel chain teeth to embed. Specifically, the second dragging module further comprises a supporting seat 26, a floating seat 27, a transition seat 28, a spring 29 and a lifting mechanism 210, the floating seat 27 is longitudinally slidably installed on the supporting seat 26, the upper roller 23 is rotatably installed on the floating seat 27, the transition seat 28 is longitudinally movably installed on the floating seat 27, the two ends of the spring 29 are respectively abutted against the floating seat 27 and the transition seat 28, the lifting mechanism 210 can drive the floating seat 27 to move downward, the spring 29 is pressed downward to drive the floating seat 27 to move downward, and then the upper roller 23 is driven to move downward in cooperation with the lower roller 24, and the lifting mechanism 210 drives the floating seat 27 to move upward to drive the transition seat 28, the floating seat 27 and the upper roller 23 to move upward.

[0046] In the embodiment, the control of the sewing mechanism 1, the dragging mechanism 2, the needle protection driving part 42 and the dragging driving part 25 by the electric control module 3 is that a software engineer programs the electric control module 3 to realize the start-stop, speed, direction and other controls of each mechanism by constructing a computer function module.

[0047] The needle protection driving member 42 and the lifting mechanism 210 are linearly driven, and can adopt a cylinder, a linear motor, a screw nut transmission pair or the like in the prior art, which will not be described herein.

[0048] In the description of the present application, obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0049] Therefore, the above detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0050] In the description of the present application, it should be noted that the terms "middle", "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected, or electrically connected. It can be directly connected, or indirectly connected through an intermediate medium. It can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A chain belt of expanded fabric non-continuous sewing, comprising an expanded fabric belt (02) and two base fabric belts (01), the opposite sides of the two base fabric belts (01) are provided with openable and closable expansion zippers (03), characterized in that: The two sides of the expansion tape (02) are fixed to the two base tapes (01) through segmented stitching lines, which include a plurality of stitched segments (04) and a plurality of separated segments (05) that are not stitched and separated, the plurality of stitched segments (04) and the plurality of separated segments (05) are arranged in sequence along the stitching track, and the separated segments (05) on the two sides of the expansion tape (02) correspond to each other.

2. The chain belt with discontinuous stitching of expansion tape according to claim 1, characterized in that: The separated segments (05) on the two sides of the expansion tape (02) are equal in length and arranged in end-to-end alignment.

3. The chain belt with discontinuous stitching of expansion tape according to claim 1, characterized in that: The wire between the adjacent stitched segments (04) and the separated segments (05) is continuous.

4. The chain belt of claim 1 wherein one of the endless belts is a power transmission belt. The side away from the expansion zipper (03) of the base tape (01) is also provided with an opening and closing side tape (06), and the opening and closing side tape (06) and the base tape (01) are provided with an opening box zipper (07).

5. Sewing apparatus for manufacturing a chain belt as claimed in any one of claims 1 to 4, characterized in that: The stitching mechanism (1) and the tow tape mechanism (2) are included, the stitching mechanism (1) includes a supporting table (11), and the tow tape mechanism (2) is used to tow the two base tapes (01) and the expansion tape (02) to continuously flow through the supporting table (11) synchronously; A needle assembly (12) is arranged above the supporting table (11), which includes a needle holder (121), two groups of needle bodies (122) arranged longitudinally, and a sewing power element for driving the needle holder (121) to move up and down, the two groups of needle bodies (122) are fixed to the needle holder (121) and are horizontally arranged in parallel, and correspond to the stitching track of the two sides of the expansion tape (02); a wire hook assembly (13) is arranged below the supporting table (11), which includes two wire hook bodies (131) corresponding to the two groups of needle bodies (122) respectively and a wire hook driving element for driving the wire hook bodies to move; the two groups of needle bodies (122) and the two wire hook bodies (131) are matched one by one to stitch the two sides of the base tape (01) and the expansion tape (02) that pass through each other; An electric control module (3) electrically connected with the sewing power element and the wire hook driving element is further included to control the cycle switching between the stitching state and the stop state, in the stitching state, the base tape (01) and the expansion tape (02) segments that flow through are stitched and fixed to each other, and in the stop state, the base tape (01) and the expansion tape (02) segments that flow through are separated without being stitched.

6. The sewing apparatus according to claim 5, characterized by: A needle protection mechanism (4) is further included, which includes a needle protection stop block (41) and a needle protection driving element (42), in the stop state, the needle protection driving element (42) drives the needle protection stop block (41) to resist the side of the two groups of needle bodies of the stitching mechanism (1), and the resistance direction is opposite to the tow direction.

7. The sewing apparatus according to claim 5, characterized by: The tow tape mechanism (2) includes a first tow tape module (21) and a second tow tape module (22) that can tow the base tape (01) and the expansion tape (02) to move, the first tow tape module (21) and the second tow tape module (22) are electrically connected with the electric control module (3) to control the start and stop of the first tow tape module (21) and the second tow tape module (22).

8. The sewing equipment according to claim 7, characterized in that: in The first pulling module (21) is used to pull the base fabric tape (01) and the capacity expansion fabric tape (02) in the suture state, and the second pulling module (22) is used to pull the base fabric tape (01) and the capacity expansion fabric tape (02) in the stop state, and the pulling speed of the second pulling module (22) is less than that of the first pulling module (21).

9. The sewing apparatus according to claim 7, characterized by: The first pulling module (21) and the second pulling module (22) respectively include an upper roller (23), a lower roller (24) and a pulling driving element (25), the upper roller (23) and the lower roller (24) are arranged in parallel and leave a gap for the base fabric tape (01) and the capacity expansion fabric tape (02) to pass through, and the pulling driving element (25) is electrically connected with the electric control module (3) and used to drive the upper roller (23) and / or the lower roller (24) to rotate, so that the upper roller (23) and the lower roller (24) jointly hold the base fabric tape (01) and the capacity expansion fabric tape (02) to move; the gap between the upper roller (23) and the lower roller (24) is adjustable.

10. The sewing apparatus according to claim 9, characterized by: The upper roller (23) is longitudinally and elastically arranged to elastically press the top surface of the base fabric tape (01) and the capacity expansion fabric tape (02); the upper roller (23) and / or the lower roller (24) is provided with a circumferential accommodation groove (241) for the capacity expansion zipper (03) to pass through.

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