Yarn roll fixing device and template sewing machine

Abstract

The utility model relates to the technical field of sewing machines, and particularly discloses a yarn roll fixing device and a template sewing machine, the yarn roll fixing device comprises an installation support and a fixing assembly, the fixing assembly comprises a base, a yarn shaft and a barrel, the barrel is obliquely arranged on the base upwards, and a yarn roll is closer to a rotating shaft of a machine head structure when placed on the yarn shaft. The centrifugal force borne by the yarn roll is reduced, the yarn roll faces the yarn tension device, and the rolled-out yarn can be used for sewing in time and is not prone to hooking other objects. The area of the cross section of the second port of the cylinder is smaller than that of the cross section of the first port, redundant yarn is difficult to slide out along the cylinder when the machine head structure rotates, the yarn shaft is consistent with the axis of the cylinder, and a yarn roll is difficult to shake in the cylinder. The utility model further provides the template sewing machine, the template sewing machine comprises the machine head structure and the yarn roll fixing device, when the machine head structure rotates, the yarn roll fixing device can fix the yarn roll, and the operation process of workers is not interfered by yarn.

Description

Technical Field

[0001] The utility model relates to the technical field of sewing machines, in particular to a yarn roll fixing device and a template sewing machine. Background Art

[0002] A sewing machine uses one or more threads to create one or more seams, interweaving or stitching one or more layers of material. It can sew fabrics such as cotton, linen, silk, and rayon, as well as various products such as leather and paper. Its stitches are even and strong, creating neat, beautiful, smooth, and firm seams. Sewing machines can quickly and accurately complete sewing tasks, offering high efficiency and ease of use.

[0003] However, the head structure used in traditional sewing machines is fixed. When sewing complex shapes, the fabric or product needs to be frequently moved to match the sewing direction. In addition, it is difficult to accurately insert the needle to the required sewing position for sewing tasks in a small space. In order to improve operational flexibility and sewing effects, the relevant technology discloses a template sewing machine with a rotatable head structure. The head structure is provided with a yarn reel fixing device for accommodating the yarn reel. When the head structure rotates, the yarn on the yarn reel can pass through the yarn tension device and enter the sewing needle. When sewing fabrics of complex shapes, the sewing direction can be easily changed by rotating the head structure, and the direction of the stitches can be accurately controlled.

[0004] However, for the template sewing machine with a rotatable head structure mentioned above, the position of the yarn reel fixing device is far away from the rotating shaft of the head structure, and the direction of its yarn axis is at a certain angle to the pulling direction of the yarn tension device. When the head structure rotates at high speed, the yarn reel will be offset in the yarn reel fixing device under the combined influence of centrifugal force and the pulling force of the yarn tension device. The stability of the yarn reel is poor. In addition to the normal supply of yarn required for the sewing process, the yarn reel may also throw out a section of yarn as the head structure rotates. This part of the yarn may affect the normal operation of the staff on the workbench when being thrown out, and thus affect the normal operation of the sewing machine. It may also hook other objects on the workbench, creating a safety hazard. Utility Model Content

[0005] The purpose of the utility model is to provide a yarn roll fixing device and a template sewing machine, wherein the yarn roll in the yarn roll fixing device will not be offset when the head structure rotates, and the centrifugal force acting on the yarn roll is reduced, thereby avoiding the throwing out of excess yarn.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a yarn roll fixing device, comprising:

[0008] A mounting bracket, the mounting bracket is used to connect the head structure of the template sewing machine;

[0009] The fixing component includes a base, a yarn shaft and a cylinder. The base is arranged on the mounting bracket, the cylinder is arranged upwardly on the base, the yarn shaft is arranged on the base and coincides with the axis of the cylinder. The yarn shaft is used to fix the yarn roll. The cylinder is provided with a first port and a second port. The base is arranged at the first port, and the cross-sectional area of the second port is smaller than the cross-sectional area of the first port.

[0010] Optionally, the base is provided with a mounting boss, which can be snapped into the central through hole of the yarn roll.

[0011] Preferably, the mounting bracket includes a mounting plate and a connecting plate that are arranged at an angle and are integrally formed, and the mounting plate is adjustably connected to the head structure.

[0012] Preferably, the mounting plate is provided with an adjustment hole, the fastener can pass through the adjustment hole and be connected to the machine head structure, and the position of the fastener is adjustably arranged in the adjustment hole.

[0013] Optionally, a first reinforcing rib is provided between the mounting plate and the connecting plate, and a second reinforcing rib is provided between the connecting plate and the cylinder.

[0014] Preferably, the mounting bracket further comprises a transition plate, one side of the transition plate is connected to the mounting plate, another side of the transition plate is connected to the connecting plate, and another side of the transition plate forms an avoidance gap with the side of the mounting plate.

[0015] Specifically, the transition plate is provided with a avoidance surface, which is an inclined plane. In the direction in which the top end of the avoidance surface extends along the bottom end, the distance between the avoidance surface and the connecting plate gradually decreases.

[0016] Specifically, the fixing assembly further includes a limiting member, which is arranged at the upper end of the yarn shaft, and the limiting member at least partially abuts against the yarn roll.

[0017] Specifically, the fixing assembly further includes a conical cylinder, the conical cylinder is sleeved on the yarn shaft, and the yarn roll is sleeved on the conical cylinder.

[0018] In a second aspect, the utility model provides a template sewing machine, comprising a machine head structure and the above-mentioned yarn reel fixing device, wherein a mounting bracket is connected to the machine head structure.

[0019] The beneficial effects of the utility model are:

[0020] The utility model proposes a yarn reel fixing device, comprising a mounting bracket and a fixing assembly, wherein the fixing assembly comprises a base, a yarn spool and a cylinder, the cylinder being arranged upwardly on an integral tilt, the base being fixed on the mounting bracket, and the mounting bracket being used to connect the machine head structure, and when the cylinder is arranged upwardly on an tilt, the position of the yarn reel is close to the rotating shaft of the machine head structure, and the centrifugal force exerted on the yarn reel when the machine head structure rotates is small, and the yarn reel is not easy to deviate in the cylinder, and at this time the yarn reel is facing the yarn tension device on the machine head structure, the direction of the yarn spool is consistent with the pulling direction of the yarn tension device, the stability of the yarn reel is improved, the yarn rotated out of the yarn reel can enter the sewing needle through the yarn tension device in time, and the yarn is not easy to hook other objects; the cross-sectional area of the second end of the cylinder is smaller than that of the first end The cross-sectional area of one port is that the cylinder is contracted in the direction extending from the first port to the second port. When the head structure rotates, even if the yarn roll releases excess yarn, it is difficult for this part of the yarn to slide out along the cylinder, and the yarn will not be easily thrown out. The shape of the contracted cylinder is similar to the shape of the tower-shaped yarn roll. When the head structure rotates, the yarn can be evenly unfolded along the curved surface of the cylinder similar to the shape of the yarn roll, so as to maintain uniform supply of yarn. The yarn shaft is set on the base. When the head rotates, the yarn shaft can fix the yarn roll, and the axis of the yarn shaft is consistent with the axis of the cylinder. When the yarn roll is placed on the yarn shaft, its center of gravity is exactly on the central axis of the cylinder. The yarn roll is not easy to shake in the cylinder under the action of centrifugal force, and the stability of the yarn roll is relatively high. The utility model also provides a template sewing machine, including a head structure and the above-mentioned yarn roll fixing device. The mounting bracket is connected to the head structure. When the head structure rotates, the yarn roll fixing device can fix the internal yarn roll to prevent the yarn roll from deviating and throwing out excess yarn under the action of centrifugal force. The operator's operation process will not be disturbed by the yarn, and the sewing work can be carried out in an orderly manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the yarn roll fixing device according to a specific embodiment of the present invention from a first viewing angle;

[0022] Figure 2 This is a schematic structural diagram of the yarn roll fixing device according to a specific embodiment of the present invention from a second viewing angle;

[0023] Figure 3 2 is a schematic structural diagram of the yarn roll fixing device according to a specific embodiment of the present invention from a third viewing angle;

[0024] Figure 4 It is a structural schematic diagram of the yarn roll fixing device described in a specific embodiment of the present utility model under the fourth viewing angle.

[0025] In the picture:

[0026] 1. Mounting bracket; 11. Mounting plate; 111. Adjustment hole; 12. Connecting plate; 13. Transition plate; 131. Avoidance surface; 14. First reinforcing rib; 2. Fixing assembly; 21. Base; 211. Mounting boss; 212. Mounting hole; 22. Cylinder; 221. First port; 222. Second port; 23. Second reinforcing rib. DETAILED DESCRIPTION

[0027] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, they can refer to fixed or detachable connection, mechanical or electrical connection, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0029] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may also include the first feature being in contact with the second feature through another feature between them. Furthermore, a first feature being "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is at a lower horizontal height than the second feature.

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] like Figures 1-4As shown, the present invention provides a yarn reel fixing device, comprising a mounting bracket 1 and a fixing assembly 2. The fixing assembly 2 includes a base 21, a yarn spool, and a barrel 22. The barrel 22 is provided with a first port 221 and a second port 222. The first port 221 is sealed to the base 21. The base 21 is mounted on the mounting bracket 1. The mounting bracket 1 is capable of connecting to the head structure of a template sewing machine. When the head structure rotates, the yarn reel fixing device can maintain synchronous movement with the head structure, ensuring that the yarn reel can be stably supplied with yarn, and the yarn is not too loose or too tight due to the inconsistency between the bobbin supply speed and the head sewing speed. The sewing stitch is neat. The yarn spool is mounted on the base 21 and coincides with the axis of the barrel 22. The yarn spool is used to fix the yarn reel. When the yarn reel is placed on the yarn spool, its center of gravity is exactly located on the axis of the barrel 22. The yarn reel is not easily shaken in the yarn reel fixing device under the action of centrifugal force, and the yarn reel has high stability. To facilitate the installation of the yarn spool, a mounting hole 212 is provided on the base 21, through which the yarn spool can be passed and fixed to the base 21. To connect the yarn spool to the base 21, threads can be machined on the surface of the yarn spool, and the threads can be matched with existing nuts. With a wrench or other locking tool, the nut can be screwed onto the yarn spool to secure the yarn spool.

[0032] The cylinder 22 is tilted upward as a whole and is arranged on the base 21, with its port facing the yarn tensioning device on the head structure. The yarn rotated out of the yarn reel can enter the sewing needle through the yarn tensioning device in a timely manner, and the yarn is not easily hooked on other objects. At this time, the position of the yarn reel is closer to the rotating shaft of the head structure. When the head structure rotates, the centrifugal force on the yarn reel is reduced, and the yarn reel is not easily offset within the yarn reel fixing device. In addition, along the direction from the first port 221 to the second port 222, the cylinder 22 is generally contracted. The cross-sectional area of the second port 222 of the cylinder 22 is smaller than the cross-sectional area of the first port 221. When the head structure rotates, even if the yarn reel releases excess yarn, it is difficult for this part of the yarn to slide out along the cylinder 22, and the yarn will not be easily thrown out. The shape of the retracted barrel 22 is similar to that of a tower-shaped yarn reel. When the machine head rotates, the yarn is evenly spread along the curved surface of the barrel 22, which is similar in shape to the yarn reel. The yarn reel can evenly supply the yarn required for the sewing process. To enhance the stability of the connection between the barrel 22 and the base 21, the barrel 22 and the base 21 can be integrally formed through an injection molding process to prevent shaking at the connection due to the rotation of the machine head.

[0033] like Figure 1 and Figure 2As shown, the mounting bracket 1 can include a mounting plate 11 and a connecting plate 12. In order to maintain the connection strength between the mounting plate 11 and the connecting plate 12 when the head structure rotates, the mounting plate 11 and the connecting plate 12 can be made into an integrally formed structure, and this process can be achieved by an injection molding process. The base 21 is arranged at the first port 221, and the mounting plate 11 is used to connect the head structure. The mounting plate 11 can be a vertical plate. An inclined angle is formed between the mounting plate 11 and the connecting plate 12, and the angle can be a right angle. The connecting plate 12 is arranged vertically to the base 21, and the cylinder 22 is arranged upwardly as a whole. After the setting is completed, when the yarn roll is placed on the yarn shaft, its port can face the yarn tension device, and the yarn turned out of the yarn roll can be used for sewing in time to avoid generating excess yarn hooking surrounding objects. In order to maintain the angle between the mounting plate 11 and the connecting plate 12, a first reinforcing rib 14 can be set between the mounting plate 11 and the connecting plate 12 to increase the bending and torsional strength of the mounting bracket 1 as a whole. In order to enhance the connection strength between the mounting bracket 1 and the fixing assembly 2 , a certain distance may be left between the connecting plate 12 and the cylinder 22 , and a second reinforcing rib 23 may be provided at the distance.

[0034] In one embodiment, the mounting bracket 1 and the fixing assembly 2 can be integrally formed. To accommodate machine head structures of varying sizes, the mounting plate 11 can be configured as a positionally adjustable plate. To adjust the position of the mounting plate 11, an adjustment hole 111 can be provided on the mounting plate 11. The adjustment hole 111 can be strip-shaped, reducing the machining precision requirements for the adjustment hole 111. The adjustment hole 111 can be used in conjunction with a fastener, which can penetrate the adjustment hole 111 and connect to the machine head structure. The position of the fastener within the adjustment hole 111 can be adjusted depending on the actual installation process. The fastener can be a bolt or screw.

[0035] In other embodiments, the connecting plate 12 can be made of a deformable material. During installation, the connecting plate 12 is bent to adjust the inclination angle of the connecting plate 12, thereby adjusting the position of the fixed assembly 2 fixed thereto. When the second end 222 of the barrel 22 faces the yarn tension device, the bending of the connecting plate 12 is stopped. In this state, when the yarn reel is placed on the barrel 22, the yarn reel is positioned closer to the rotating shaft of the head structure. When the head structure rotates, the centrifugal force on the yarn reel is reduced, and the yarn reel is less likely to deviate within the barrel 22. At this time, the barrel 22 faces the yarn tension device on the head structure, and the direction of the yarn axis is consistent with the pulling direction of the yarn tension device, thereby improving the stability of the yarn reel. At the same time, the yarn tension device can timely adjust the yarn discharged from the yarn reel to ensure the quality and uniformity of the yarn, thereby avoiding the generation of excess yarn at the yarn reel, which causes the yarn to be too loose and causes loose weaving, and also preventing the excess yarn from getting caught on other items on the workbench, thereby eliminating safety hazards.

[0036] In order to fix the yarn roll, a mounting boss 211 can be provided on the base 21. The mounting boss 211 can be inserted into the central through hole of the yarn roll to provide stable support for the yarn roll. The yarn roll will not shake in the yarn roll fixing device as the head structure rotates, thereby preventing the yarn roll from throwing out excess yarn other than that required for the normal sewing process.

[0037] like Figure 3 and Figure 4 As shown, in order to prevent the yarn reel fixing device from colliding with the lubricating device located at the bottom of the head structure when the head rotates, an avoidance gap can be set between the mounting plate 11 and the connecting plate 12 to prevent the yarn reel fixing device from colliding with and wearing the surrounding structure. At this time, in order to achieve a smooth connection between the mounting plate 11 and the connecting plate 12, a transition plate 13 can be processed on the mounting bracket 1, one side of the transition plate 13 is connected to the mounting plate 11, and the other side of the transition plate 13 is connected to the connecting plate 12. Another side of the transition plate 13 and the side of the mounting plate 11 can form an avoidance gap. Figure 4 As shown, a avoidance surface 131 can be provided on the transition plate 13. The avoidance surface 131 can be an inclined plane. In the direction in which the top of the avoidance surface 131 extends along the bottom end, the distance between the avoidance surface 131 and the connecting plate 12 gradually decreases. The setting of the avoidance surface 131 can enable the yarn reel fixing device to maintain a certain distance from the nearby structure when the random head structure rotates, thereby avoiding collision, and can also facilitate the installation of the mounting bracket 1.

[0038] In order to prevent the yarn reel from axially disengaging from the yarn reel fixing device when the machine head structure rotates, a limiter can be installed at the upper end of the yarn shaft, and the limiter at least partially abuts against the yarn reel. The limiter can be an elastic member, such as a rubber pad or a rubber plug. When in use, the elastic deformation ability of the rubber pad or rubber plug can be utilized to install it on the yarn shaft until part of its structure abuts against the yarn reel, thereby limiting the yarn reel. The limiter can also be a non-elastic member. For example, the limiter can be made of polytetrafluoroethylene, which has the characteristics of high strength and low friction coefficient, and can ensure that the yarn reel is effectively limited. Moreover, its low friction coefficient prevents the yarn from being excessively obstructed by the limiter during extraction and use, and normal sewing work will not be interfered with by the limiter.

[0039] In order to prevent the yarn roll from rotating along the yarn shaft when the head structure rotates, the fixing component 2 can include a conical cylinder, which is sleeved on the yarn shaft. When the yarn roll is placed on the yarn shaft, it can be sleeved with the conical cylinder, and the central through hole of the yarn roll can fit tightly with the outer wall of the conical cylinder. When the head structure rotates, the position of the yarn roll relative to the cylinder 22 can remain fixed, and it is not easy to shake or shift. The yarn roll will not rotate to throw out excess yarn, and the sewing work will not be affected.

[0040] The present utility model also provides a template sewing machine, including a head structure and the above-mentioned yarn reel fixing device. The mounting bracket 1 is connected to the head structure. When the head structure rotates, the yarn reel fixing device can fix the internal yarn reel to prevent the yarn reel from deviating and throwing out excess yarn under the action of centrifugal force. The operator's operation process will not be disturbed by the yarn, and the sewing work can be carried out in an orderly manner.

[0041] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A yarn roll fixing device, characterized in that: include: A mounting bracket (1), the mounting bracket (1) being used to connect to a head structure of a template sewing machine; A fixing assembly (2), the fixing assembly (2) comprising a base (21), a yarn shaft and a cylinder (22), the base (21) being arranged on the mounting bracket (1), the cylinder (22) being arranged obliquely upward on the base (21), the yarn shaft being arranged on the base (21) and coinciding with the axis of the cylinder (22), the yarn shaft being used to fix a yarn roll, the cylinder (22) being provided with a first port (221) and a second port (222), the base (21) being arranged at the first port (221), the cross-sectional area of the second port (222) being smaller than the cross-sectional area of the first port (221).

2. The yarn roll fixing device according to claim 1, characterized in that: The base (21) is provided with a mounting boss (211), and the mounting boss (211) can be inserted into the central through hole of the yarn roll.

3. The yarn roll fixing device according to claim 1, characterized in that: The mounting bracket (1) comprises a mounting plate (11) and a connecting plate (12) which are arranged at an angle and formed integrally, and the mounting plate (11) is connected to the machine head structure in an adjustable manner.

4. The yarn reel fixing device according to claim 3, characterized in that: The mounting plate (11) is provided with an adjustment hole (111), a fastener can pass through the adjustment hole (111) and be connected to the machine head structure, and the position of the fastener is adjustably arranged in the adjustment hole (111).

5. The yarn roll fixing device according to claim 3, characterized in that: A first reinforcing rib (14) is provided between the mounting plate (11) and the connecting plate (12), and a second reinforcing rib (23) is provided between the connecting plate (12) and the cylinder (22).

6. The yarn roll fixing device according to claim 3, characterized in that: The mounting bracket (1) further comprises a transition plate (13), one side of the transition plate (13) being connected to the mounting plate (11), another side of the transition plate (13) being connected to the connecting plate (12), and another side of the transition plate (13) forming an avoidance gap with a side of the mounting plate (11).

7. The yarn roll fixing device according to claim 6, characterized in that: The transition plate (13) is provided with a relief surface (131), which is an inclined plane. In a direction in which the top end of the relief surface (131) extends along the bottom end, the distance between the relief surface (131) and the connecting plate (12) gradually decreases.

8. The yarn roll fixing device according to any one of claims 1 to 7, characterized in that: The fixing assembly (2) further comprises a limiting member, which is arranged at the upper end of the yarn shaft and at least partially abuts against the yarn roll.

9. The yarn reel fixing device according to any one of claims 1 to 7, characterized in that: The fixing assembly (2) further comprises a conical cylinder, the conical cylinder is sleeved on the yarn shaft, and the yarn roll is sleeved on the conical cylinder.

10. Template sewing machine, characterized in that, It comprises a machine head structure and a yarn reel fixing device according to any one of claims 1 to 9, wherein the mounting bracket (1) is connected to the machine head structure.

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