A universal automatic empty car line ring cutting device for a knotter

Abstract

The utility model discloses a kind of automatic empty car line ring cutting devices of general-purpose loop tying machine, belong to loop tying machine technical field. Including: pin plate, it has first empty car line ring suction port;Suction mechanism, it is located at the bottom of pin plate and is set towards first empty car line ring suction port;Shearing mechanism, it is set in the bottom of pin plate and is used for cutting empty car line ring;Suction port adjusting plate, it is detachably connected to pin plate and covers first empty car line ring suction port, suction port adjusting plate has second empty car line ring suction port, second empty car line ring suction port is communicated with first empty car line ring suction port, and the caliber of second empty car line ring suction port is not greater than the caliber of first empty car line ring suction port. By setting detachable suction port adjusting plate, user can replace the adjusting plate with different caliber second empty car line ring suction port according to actual needs, avoid the problem that cloth is inhaled when thin material is sewn, suction is insufficient when thick thread is sewn, enhance the applicability of device under multiple working conditions.

Description

Technical Field

[0001] This utility model belongs to the field of knotting machine technology, specifically relating to a universal knotting machine automatic empty thread loop cutting device. Background Technology

[0002] A bartacking machine, also known as a bartacking machine or bartacking machine, is a specialized sewing device commonly used in the garment, bag, and footwear sewing industries. It is mainly used to repeatedly reinforce the beginning or end of a stitch to prevent it from coming loose. After completing a bartacking operation, an excess loop of thread (i.e., thread tail) is usually formed at the end of the fabric. To prevent this loop from fraying, pulling, or affecting the appearance during subsequent processing or use, it must be cut off promptly after sewing.

[0003] Currently, most automatic bartacking machines are equipped with automatic thread cutting devices and combined with vacuum suction systems to automatically handle empty thread loops. Specifically, there is an empty thread loop suction port on the needle plate. The suction mechanism connected to the bottom generates negative pressure to suck in the cut empty thread loops and guide them to the collection device, thereby achieving automated cleaning.

[0004] However, a significant problem exists in the existing technology: the empty thread loop suction port on the needle plate is usually designed with a fixed diameter. In actual production, because the thickness, material, and thread thickness of the processed fabric often need to be changed, this fixed structure is difficult to adapt to diverse process requirements, such as: When sewing thinner fabrics or using finer threads, the suction force generated by a fixed-diameter air intake is relatively too strong, which can easily draw the edges of thin fabric into the air intake channel, causing the fabric to be pulled, deformed, or even blocked. Conversely, when processing thicker empty wire loops, if the air inlet is too small, the air volume may be insufficient, failing to effectively guide the empty wire loop into the cutting area or promptly remove the cut wire ends, resulting in wire residue, entanglement, or failed cutting.

[0005] The aforementioned problems not only affect the reliability and stability of the wire cutting process, but also reduce the versatility and production efficiency of the equipment, and increase the adjustment and maintenance burden on operators. Summary of the Invention

[0006] This invention addresses the aforementioned problems in the existing technology by proposing an automatic loop-cutting device for bartacking machines that allows for flexible adjustment of the air inlet diameter and adaptability to different sewing conditions.

[0007] This utility model can be achieved through the following technical solutions: A universal automatic wire loop shearing device for bar knotting machines, comprising: The needle plate has a first empty line ring air intake; A suction mechanism is located at the bottom of the needle plate and is positioned toward the suction port of the first empty train line loop. A shearing mechanism is provided at the bottom of the needle plate and is used to shear empty thread loops; An air inlet adjustment plate is detachably connected to the needle plate and covers the first empty train line ring air inlet. The air inlet adjustment plate has a second empty train line ring air inlet, which is connected to the first empty train line ring air inlet, and the diameter of the second empty train line ring air inlet is not greater than the diameter of the first empty train line ring air inlet.

[0008] As a further improvement of this utility model, the needle plate is provided with a recessed mounting groove at the first empty line ring air inlet, and the first empty line ring air inlet is located in the mounting groove.

[0009] As a further improvement of this utility model, the air intake adjustment plate is embedded in the mounting groove and locked by fasteners.

[0010] As a further improvement of this utility model, the suction mechanism includes: A suction tube bracket is located at the bottom of the needle plate; The suction pipe has its end connected to the suction pipe bracket.

[0011] As a further improvement of this utility model, the suction pipe bracket includes an integrally connected mounting part and a suction part. The mounting part is connected to the needle plate by fasteners, and the suction part is located at the bottom of the suction port of the first empty car line ring.

[0012] As a further improvement of this utility model, the suction part has a sunken surface to form a clearance space, and the outer edge of the sunken surface has at least one opening.

[0013] As a further improvement of this utility model, the shearing mechanism extends from the open opening into the clearance space, so that the shearing mechanism is located between the first empty train line loop air inlet and the air inlet pipe.

[0014] As a further improvement of this utility model, the shearing mechanism includes a fixed blade, a movable blade, and a spring pressure plate arranged sequentially from top to bottom, wherein... The fixed blade is fixedly installed at the bottom of the needle plate; The fixed blade, the movable blade, and the elastic pressure plate are connected by axial screws.

[0015] As a further improvement of this utility model, a nut is screwed onto the shaft screw located at the bottom of the elastic pressure plate, and the nut presses the elastic pressure plate tightly onto the movable blade.

[0016] As a further improvement of this utility model, the shearing mechanism further includes a drive cylinder and a connecting rod, with both ends of the connecting rod connected to the drive cylinder and the movable blade, respectively.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Enhance versatility and adaptability: By setting a detachable air intake adjustment plate, users can flexibly replace the adjustment plate with different diameter second empty sewing ring air intakes according to different fabric thicknesses and sewing thread thicknesses. This effectively avoids problems such as fabric being sucked in when sewing thin materials and insufficient suction when sewing thick threads, significantly enhancing the device's adaptability and process compatibility under various working conditions. 2. Achieve efficient coordination between shearing and suction: The suction mechanism is equipped with an open clearance space, which allows the shearing mechanism to be embedded in the key position between the suction port and the suction pipe. This ensures that the empty wire loop is immediately adsorbed by negative pressure at the moment of shearing, achieving efficient linkage of "sucking immediately after shearing". This effectively prevents the wire ends from flying, tangling or clogging, and improves the stability of the operation and cleaning efficiency. 3. Compact and reliable structure, convenient maintenance: The design adopts a mounting slot positioning air inlet adjustment plate, integrated air pipe bracket, elastic pressure plate pre-tightening and pneumatic drive, which not only improves the installation accuracy and operational stability of each component, but also optimizes the space layout; at the same time, the modular and adjustable key components are easy to disassemble, replace and maintain, extending the service life of the equipment and making it suitable for long-term stable operation of automated sewing production lines. Attached Figure Description Figure 1 This is a schematic diagram of the automatic empty car wire loop shearing device of this utility model; Figure 2 This is a schematic diagram of the shearing mechanism at the bottom of the automatic empty car wire loop shearing device of this utility model; Figure 3 This is an exploded view of the automatic empty car wire loop shearing device of this utility model.

[0018] In the diagram, 100 is the needle plate; 110 is the first empty line ring air intake; and 120 is the mounting slot. 200. Suction duct bracket; 210. Mounting section; 220. Suction section; 221. Clearance space; 222. Opening; 230. Suction duct; 300. Fixed blade; 310. Movable blade; 320. Spring pressure plate; 330. Shaft screw; 340. Nut; 350. Drive cylinder; 360. Connecting rod; 400. Air intake adjustment plate; 410. Second empty train line ring air intake. Detailed Implementation The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. The technical methods of the present invention will be further described, but the present invention is not limited to these embodiments.

[0019] like Figure 1-3 As shown, this utility model provides a universal automatic wire loop shearing device for bar knotting machines, comprising: Needle plate 100, which has a first empty line ring air intake 110; The suction mechanism is located at the bottom of the needle plate 100 and is positioned toward the suction port 110 of the first empty train line ring; A shearing mechanism is provided at the bottom of the needle plate 100 and is used to shear empty thread loops; The air inlet adjusting plate 400 is detachably connected to the needle plate 100 and covers the first empty line ring air inlet 110. The air inlet adjusting plate 400 has a second empty line ring air inlet 410, which is connected to the first empty line ring air inlet 110, and the diameter of the second empty line ring air inlet 410 is not greater than the diameter of the first empty line ring air inlet 110.

[0020] It should be noted that the fixed diameter of the suction port for the empty thread loop in existing bartacking machines leads to poor adaptability. For example, when sewing thin materials or fine threads, a fixed large-diameter suction port can easily draw thin fabric into the suction channel due to concentrated and excessive suction, causing fabric displacement, damage, or blockage, affecting normal thread cutting. On the other hand, when processing thick threads or thick materials, if the suction port is too small, it will result in insufficient suction, and the empty thread loop cannot be effectively guided and sucked away, resulting in incomplete cutting or thread residue.

[0021] The automatic empty thread loop cutting device for the knotting machine provided in this embodiment achieves flexible adjustment of the actual suction port diameter by adding a detachable air inlet adjustment plate 400 to the needle plate 100 and connecting the second empty thread loop air inlet 410 on it to the first empty thread loop air inlet 110 of the needle plate 100.

[0022] This design allows users to select and install different diameter air intake adjustment plates 400 according to the current processing parameters such as fabric thickness, stitch thickness, and material, thereby precisely controlling the suction area and airflow intensity. 1. When sewing thin fabrics or fine threads, a small-diameter suction port adjustment plate 400 can be used to reduce the suction area and suction range while ensuring that the empty thread loops can be effectively adsorbed, so as to avoid the fabric being accidentally sucked in and improve the processing stability. 2. When sewing thick materials or thick threads, a larger diameter air intake adjustment plate 400 can be used to ensure sufficient air volume, quickly and stably guide the empty thread loop into the cutting area, and promptly discharge the cut thread ends.

[0023] Overall, by setting a replaceable suction port adjustment plate 400, the technical defects of traditional fixed suction port devices, such as poor versatility, easy suction of cloth, and poor suction of thread, are effectively solved. The adaptability, reliability and operation efficiency of the automatic thread cutting system are significantly improved, and the technical effect of being able to stably complete the integrated operation of "thread cutting-thread suction" under various working conditions is achieved. It has good practical value and promotion prospects.

[0024] Preferably, the needle plate 100 is provided with an installation groove 120 at the first empty line ring suction port 110. The first empty line ring suction port 110 is located in the installation groove 120. The suction port adjustment plate 400 is embedded in the installation groove 120 and locked by fasteners. This structural design allows the suction port adjustment plate 400 to be accurately positioned and stably installed on the needle plate 100, avoiding displacement or loosening caused by vibration or airflow impact. This ensures that the second empty line ring suction port 410 and the first empty line ring suction port 110 are always aligned, ensuring the continuity and sealing of the suction channel.

[0025] Meanwhile, the mounting slot 120 makes the suction port adjustment plate 400 flush with the surface of the needle plate 100, making the overall structure more compact. This prevents the suction port adjustment plate 400 from protruding and interfering with the movement of the sewing material or with the needle and cutter. It is locked with fasteners, making disassembly and assembly convenient. It is easy to quickly replace the adjustment plate of the corresponding diameter according to different process requirements, which not only improves the versatility and maintenance efficiency of the device, but also enhances the stability and reliability of suction and shearing operations.

[0026] Preferably, the suction mechanism includes: The suction tube bracket 200 is set at the bottom of the needle plate 100 and includes an integrally connected mounting part 210 and suction part 220. The mounting part 210 is connected to the needle plate 100 by fasteners. The suction part 220 is located at the bottom of the first empty thread ring suction port 110 and is always aligned with the first empty thread ring suction port 110, so that the airflow path is minimized and the suction efficiency is maximized. It can quickly suck in and discharge the cut empty thread ring, prevent blockage or tangling, and significantly improve the stability and response speed of automatic thread cutting and cleaning. The suction pipe 230 has its suction port connected to the suction section 220 of the suction pipe bracket 200, forming a continuous airflow channel from the second empty train line ring suction port 410, the first empty train line ring suction port 110, the suction section 220 to the suction pipe 230, ensuring stable transmission of negative pressure.

[0027] Specifically, the suction section 220 has a recessed surface to form a clearance space 221, and the outer edge of the recessed surface has at least one opening 222. The shearing mechanism extends from the opening 222 into the clearance space 221 so that the shearing mechanism is located between the first empty train line ring suction port 110 and the suction pipe 230.

[0028] This structure achieves a high degree of spatial integration between the shearing mechanism and the suction mechanism, which not only avoids interference between the two during installation and movement, but also ensures that the shearing action occurs in the core area of ​​the suction action.

[0029] This layout ensures that the empty wire loop is in a negative pressure environment the moment it is cut, allowing it to be immediately sucked into the air duct. This effectively prevents the wire ends from scattering, getting tangled in the blade, or causing blockages. At the same time, the design of the clearance space 221 enhances the compactness and rationality of the overall structure, which is conducive to the miniaturization of the equipment and its long-term stable operation. It also significantly improves the efficiency and reliability of the wire cutting and suction processes.

[0030] Preferably, the shearing mechanism includes a fixed blade 300, a movable blade 310, and a spring pressure plate 320 arranged sequentially from top to bottom. The fixed blade 300 is fixedly installed at the bottom of the needle plate 100 as the fixed blade reference surface for shearing; The fixed blade 300, the movable blade 310, and the elastic pressure plate 320 are connected by a shaft screw 330. The high-speed rotation of the movable blade 310 cooperates with the fixed blade 300 to complete the shearing action. The elastic pressure plate ensures that the movable blade 310 is always in close contact with the fixed blade 300 during the shearing process through elastic pre-tightening, which effectively improves the stability and sharpness of the shearing and avoids the phenomenon of the empty wire loop being pulled or unable to be cut due to gaps.

[0031] Specifically, a nut 340 is screwed onto the shaft screw 330 at the bottom of the elastic pressure plate 320. By tightening the nut 340, a downward preload is applied to the elastic pressure plate 320, which is then firmly pressed onto the movable blade 310. This structure allows for precise adjustment of the pressure of the elastic pressure plate 320, thereby controlling its rebound force and adhesion force on the movable blade 310. This ensures that the movable blade 310 remains tightly attached to the fixed blade 300 during the shearing process, effectively increasing the contact pressure and shearing force during shearing and avoiding problems such as uneven cutting lines, pulling lines, or incomplete cutting caused by loose blades or gaps.

[0032] Furthermore, the shearing mechanism also includes a drive cylinder 350 and a connecting rod 360. The two ends of the connecting rod 360 are connected to the drive cylinder 350 and the movable blade 310, respectively. The drive cylinder 350 outputs reciprocating motion precisely through pneumatic control, and transmits the power to the movable blade 310 through the connecting rod 360, causing it to swing around the shaft screw 330, thereby realizing the opening and closing shearing action of the movable blade 310 and the fixed blade 300.

[0033] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of any combination of the above technical features. The above are specific embodiments of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] The technical solutions of the various embodiments of this utility model can be combined with each other, but only if they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0037] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A universal automatic wire loop shearing device for a knotting machine, characterized in that, include: The needle plate has a first empty line ring air intake; A suction mechanism is located at the bottom of the needle plate and is positioned toward the suction port of the first empty train line loop. A shearing mechanism is provided at the bottom of the needle plate and is used to shear empty thread loops; An air inlet adjustment plate is detachably connected to the needle plate and covers the first empty train line ring air inlet. The air inlet adjustment plate has a second empty train line ring air inlet, which is connected to the first empty train line ring air inlet, and the diameter of the second empty train line ring air inlet is not greater than the diameter of the first empty train line ring air inlet.

2. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 1, characterized in that, The needle plate has a recessed mounting groove at the first empty train line ring air inlet, and the first empty train line ring air inlet is located in the mounting groove.

3. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 2, characterized in that, The air intake adjustment plate is embedded in the mounting groove and locked by fasteners.

4. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 1, characterized in that, The suction mechanism includes: A suction tube bracket is located at the bottom of the needle plate; The suction pipe has its end connected to the suction pipe bracket.

5. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 4, characterized in that, The suction pipe bracket includes an integrally connected mounting part and suction part. The mounting part is connected to the needle plate by fasteners, and the suction part is located at the bottom of the suction port of the first empty car line ring.

6. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 5, characterized in that, The suction section has a recessed surface to form a clearance space, and the outer edge of the recessed surface has at least one opening.

7. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 6, characterized in that, The shearing mechanism extends from the opening into the clearance space, so that the shearing mechanism is located between the first empty train line loop air inlet and the air inlet pipe.

8. The universal automatic shearing device for empty thread loops in a knotting machine according to claim 1, characterized in that, The shearing mechanism includes a fixed blade, a movable blade, and a spring-loaded pressure plate arranged sequentially from top to bottom. The fixed blade is fixedly installed at the bottom of the needle plate; The fixed blade, the movable blade, and the elastic pressure plate are connected by axial screws.

9. A universal automatic shearing device for empty thread loops in a knotting machine according to claim 8, characterized in that, A nut is screwed onto the shaft screw located at the bottom of the elastic pressure plate, and the nut presses the elastic pressure plate tightly onto the movable blade.

10. A universal automatic shearing device for empty thread loops in a knotting machine according to claim 8, characterized in that, The shearing mechanism also includes a drive cylinder and a connecting rod, with the two ends of the connecting rod connected to the drive cylinder and the movable blade, respectively.

Images