Thread stand structure on sewing machine

Abstract

The invention relates to a thread stand structure on a sewing machine, the thread stand structure comprises a support column and a thread passing cross rod group, the thread passing cross rod group comprises a thread guide cross rod and a bobbin cross rod, the thread guide cross rod is arranged above the bobbin cross rod, a thread column detachably connected with the bobbin cross rod is arranged on the bobbin cross rod, and the thread guide cross rod is arranged on the support column. Mounting holes and open grooves communicated with the mounting holes are formed in the wire cross rod and the bobbin cross rod, the supporting columns are arranged in the mounting holes in a penetrating mode, locking assemblies are arranged on the wire cross rod and the bobbin cross rod, and the locking assemblies can adjust the clamping force of the cross rods on the two sides of the open grooves so that the wire passing cross rod sets can tightly hold the supporting columns or loosen the supporting columns. Therefore, the wire passing cross rod group and the supporting column can be assembled or disassembled. By the adoption of the technical scheme, according to the thread stand structure on the sewing machine, the thread passing transverse rod set and the supporting columns are convenient and fast to disassemble and assemble, meanwhile, the supporting columns are arranged in a segmented mode, storage and transportation are convenient, and space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing machines, in particular to a thread rack structure on a sewing machine. Background Art

[0002] The thread stand on a sewing machine is a device that organizes the sewing threads to ensure that they will not become tangled or mixed when multiple sewing threads are used at the same time.

[0003] The existing wire rack includes a support column and a wire crossbar group fixed on the support column. The wire crossbar group is divided into a conductor crossbar and a bobbin crossbar. The conductor crossbar is used for conducting wires, the bobbin crossbar is used for placing the wire reel, and the wire reel is used to fix the wire reel.

[0004] In the prior art, the wire crossing cross bar and the support column are assembled in a fixed connection and cannot be disassembled, which is inconvenient for maintenance and replacement. The angle of the wire crossing cross bar is fixed and cannot be adjusted. At the same time, the support columns in the prior art are all arranged as an integral whole, and the wire columns are also fixed on the wire drum cross bar and cannot be disassembled, which makes the support columns inconvenient to transport. Summary of the Invention

[0005] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a thread rack structure on a sewing machine, which is convenient and quick to disassemble and assemble between the thread passing cross bar group and the support column. At the same time, the support column is arranged in sections, which is convenient for storage and transportation and saves space.

[0006] The technical solution of the present invention is as follows: A thread rack structure on a sewing machine includes a support column and a thread-passing cross bar group, the thread-passing cross bar group includes a wire guide cross bar and a spool cross bar, the wire guide cross bar is arranged above the spool cross bar, the spool cross bar is provided with a wire column detachably connected thereto, the support column includes a plurality of separately arranged column sections, and the adjacent two columns are detachably connected via a connecting assembly, the wire guide cross bar and the spool cross bar are both provided with mounting holes and slots communicating with the mounting holes, the support column is passed through the mounting holes, and the wire guide cross bar and the spool cross bar are both provided with locking assemblies, the locking assemblies can adjust the clamping force of the cross bars on both sides of the slot so that the wire guide cross bar group hugs the support column or loosens the support column, thereby realizing the installation or disassembly between the wire guide cross bar group and the support column.

[0007] Using the above technical solution, the support column is inserted into the mounting hole of the wire spool cross bar, and the slot size is adjusted by the locking assembly so that the cross bar hugs the support column so that the cross bar is fixed on the support column, or there is a gap between the cross bar and the support column, and the cross bar can rotate circumferentially and slide axially relative to the support column to adjust the orientation of the cross bar or remove it from the support column. The support column is set separately, and the wire column and the wire spool cross bar can also be disassembled for easy storage and transportation.

[0008] Further provision of the present invention: the locking assembly includes a rotating part and a limit rod, one end of the limit rod passes through the rotating part and passes through the slot, and a limit rod is provided on the limit rod, and a limit part is provided at the other end of the limit rod, an axial limit space is formed between the limit rod and the limit part, the rotating part is rotatably arranged on the limit rod and is located between the limit part and the side of the cross bar, the limit part is pressed against the outer surface of the rotating part, and an inclined surface or an arc surface is provided on one side of the inner side surface of the rotating part and the outer side surface of the cross bar, and a pressing surface is provided on the other side, so that when the rotating part rotates, the pressing surface cooperates with the inclined surface or the arc surface to adjust the clamping force of the cross bars on both sides of the slot.

[0009] With the above-mentioned further setting, the size of the slot opening can be adjusted by rotating the rotating part, thereby adjusting the clamping force of the cross bar. The cross bar can be disassembled and assembled without the aid of tools, which is convenient and fast, saving time and effort, and is easy and quick to adjust. When the rotating part rotates, the pressing surface cooperates with the inclined surface or arc surface, and the cross bar slides axially relative to the limit rod, thereby making the slot larger or smaller. When the cross bar is unlocked, it can rotate circumferentially or slide axially relative to the support column, and the cross bar angle can be adjusted or disassembled. When the cross bar is locked, it cannot move and has good stability.

[0010] The present invention is further configured as follows: a mounting channel is provided on the wire spool cross bar; at least two elastic hooks are provided on the lower end of the wire post; a gap is provided between adjacent elastic hooks to facilitate elastic deformation; each elastic hook passes through the mounting channel and is hooked on the bottom of the wire spool cross bar to achieve connection between the wire post and the wire spool cross bar; and a movable space is provided in the mounting channel for each elastic hook to elastically deform inwardly so as to detach the elastic hook from the wire spool cross bar.

[0011] With the above-mentioned further arrangement, there is a gap between adjacent elastic hooks. When the elastic hooks are located in the installation channel, each elastic hook is deformed inward so that the elastic hooks can pass through the installation channel. After passing through the installation channel, the elastic hooks will rebound due to their own elasticity, and the elastic hooks will hook the bottom of the wire spool cross bar to complete the connection between the wire post and the wire spool cross bar. When disassembling, press each elastic hook inward to disengage it from the bottom of the wire spool cross bar, and then pull out the wire post to remove it from the wire spool cross bar, making the disassembly and assembly of the wire post very convenient and the wire post will not be damaged after disassembly.

[0012] The present invention is further provided with: the connecting assembly includes a sleeve and a first locking sleeve and a second locking sleeve spirally sleeved outside the sleeve, the sleeve being provided with a first spiral portion, a plurality of first locking plates, a second spiral portion and a plurality of second locking plates, the first locking plate being arranged above the first spiral portion and spaced apart between two adjacent first locking plates, wherein a cylinder is inserted in the sleeve and located on the inner side of the first locking plate, the first locking sleeve is sleeved outside the first spiral portion and the first locking plate, and is threadedly connected to the first spiral portion to realize the connection or disassembly of the cylinder and the sleeve, the second locking plate is arranged below the second spiral portion, and is spaced apart between two adjacent second locking plates, another cylinder is inserted in the sleeve and located on the inner side of the second locking plate, the second locking sleeve is sleeved outside the second spiral portion and the second locking plate, and is threadedly connected to the second spiral portion to realize the connection or disassembly of the cylinder and the sleeve.

[0013] The above-mentioned further arrangement is adopted, in which the lower end of the upper column between the two adjacent columns is inserted into the upper end of the sleeve, and the upper end of the lower column is inserted into the lower end of the sleeve. The locking pieces are located on the outer periphery of the columns. By rotating the locking sleeve, the gap between the locking pieces is reduced, and the whole is deformed inward, thereby holding the columns tightly and locking the columns to achieve the connection between the two columns. When disassembly is required, the locking sleeve is rotated in the opposite direction, the gap between the locking pieces becomes larger, and the columns can be pulled out to achieve disassembly of the two columns. The structure is simple and disassembly and assembly are convenient and quick.

[0014] The present invention is further configured as follows: at least two bobbin cross bars are provided, each bobbin cross bar is arranged in sequence along the vertical direction of the support column, the bobbin cross bar is provided with a thread hole for the sewing thread on the next layer of bobbin cross bar to pass through or a thread guide with a thread hole, and the thread guide is detachably connected to the bobbin cross bar.

[0015] With the above-mentioned further arrangement, the sewing thread of the bobbin placed on the bobbin cross bar of the next layer can go upward and pass through the thread hole of the upper layer. The guide wire piece is not required to be provided on the bottom bobbin cross bar to guide the sewing thread. The guide wire piece is detachable and easy to replace when damaged.

[0016] The present invention is further configured as follows: a clamping boss and a threaded section are provided at the lower end of the support column, the threaded section is located at the lower end of the clamping boss, a clamping piece is threadedly connected to the threaded section, the clamping piece cooperates with the clamping boss to install the support column on the sewing machine, and a gasket is also provided on the support column, and the gasket is located at the lower end surface of the clamping boss.

[0017] By adopting the above-mentioned further arrangement, the support column can be installed or disassembled by rotating the clamping piece, which is convenient and quick, and no other tools are required for installation. The clamping boss and the clamping piece can be clamped on the table of the sewing machine or other places to achieve the installation of the support column. The gasket can play an anti-wear role and make the structure of the support column more stable when installed on the sewing machine and not easy to shake.

[0018] The present invention is further provided with: a wire passing bracket and a connecting rod, the connecting rod is installed on the support column, the wire passing bracket is installed on the connecting rod through a universal guide, one end of the universal guide is provided with a universal ball, and the other end is provided with a guide channel, the wire passing bracket is passed through the guide channel, and the end of the connecting rod is provided with a plurality of snap-fit ​​plates, and adjacent two snap-fit ​​plates are arranged separately, and a receiving groove for the movement of the universal ball is formed between each snap-fit ​​plate, and a fastening sleeve is connected to the external thread of the snap-fit ​​plate.

[0019] The above-mentioned further arrangement is adopted, and a plurality of second thread passing holes are provided on the thread passing bracket, and the sewing thread can pass through the second thread passing holes to guide and support the sewing thread, and the thread passing bracket can be rotated relative to the connecting rod to adjust the orientation of the thread passing bracket so that the thread feeding orientation and the sewing orientation are more matched. By rotating the fastening sleeve, the gap between each snap-fit ​​piece can be reduced or increased, so that the universal guide can be installed on or removed from the connecting rod. The universal guide rotates in the accommodating groove through the universal ball, and the angle of the thread passing bracket can be adjusted. Compared with the existing thread passing bracket structure, it is more cost-effective and more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a specific embodiment of the present invention; Figure 2 It is a partial schematic diagram of a spool crossbar according to a specific embodiment of the present invention; Figure 3 This is a schematic diagram of a rotating member provided with an inclined surface in a specific embodiment of the present invention; Figure 4 is a schematic diagram of a rotating member according to a specific embodiment of the present invention; Figure 5 Schematic diagram of a spool crossbar according to a specific embodiment of the present invention; Figure 6 Schematic diagram of the movable slot on the crossbar according to a specific embodiment of the present invention; Figure 7 Schematic diagram of a limiting rod and a nut according to a specific embodiment of the present invention; Figure 8 Schematic diagram of a support column and a connecting assembly according to a specific embodiment of the present invention; Figure 9 An exploded view of a connection assembly according to a specific embodiment of the present invention; Figure 10 A schematic diagram of a clamping boss and a clamping member according to a specific embodiment of the present invention; Figure 11 This is a schematic diagram of the connection between the universal guide and the connecting rod according to a specific embodiment of the present invention; Figure 12 A schematic diagram of a universal guide according to a specific embodiment of the present invention; Figure 13 is a schematic diagram of a connecting rod according to a specific embodiment of the present invention; Figure 14 Schematic diagram of a spool crossbar according to a specific embodiment of the present invention; Figure 15 A schematic diagram of a wire column according to a specific embodiment of the present invention; Figure 16 This is a schematic diagram of riveting the two ends of the limit column in accordance with the present invention; Figure 17 This is a schematic diagram of a specific embodiment of the present invention in which a thread hole is provided on a thread barrel crossbar; Figure 18 A schematic diagram of a pressing member according to a specific embodiment of the present invention; Figure 19 This is a schematic diagram of a specific embodiment of the present invention in which a slot is provided on a spool crossbar; Figure 20 Schematic diagram of a wire guide according to an embodiment of the present invention.

[0021] In the figure, 1, support column; 11, column; 13, clamping boss; 14, threaded section; 15, gasket; 21, wire crossbar; 22, wire drum crossbar; 221, wire column; 222, mounting channel; 223, elastic hook; 224, wire drum; 225, slot; 226, opening; 227, sleeve; 228, pressing member; 229, pressing piece; 23, mounting hole; 24, slot; 25, mounting slot; 26, movable slot; 3, locking assembly; 31, rotating member; 312, accommodating slot; 313, first through hole; 314, Lug; 32. Limit rod; 321. Limit portion; 322. Limit member; 4. Connecting rod; 41. Snap-fit ​​plate; 5. Connecting assembly; 51. Sleeve; 511. First spiral portion; 512. First locking plate; 513. Second spiral portion; 514. Second locking plate; 52. First locking sleeve; 53. Second locking sleeve; 6. Clamping member; 7. Wire passing bracket; 8. Universal guide; 81. Universal ball; 82. Guide channel; 9. Fastening sleeve; 10. Wire guide; 101. First wire passing hole; 102. Hook; 20. Inclined surface. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in this embodiment with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] It should be noted that in the description of the present invention, all directional indications (such as up, down, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being described. In the description of this disclosure, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0025] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] like Figure 1-20As shown, a thread rack structure on a sewing machine includes a support column 1 and a thread-passing crossbar group, the thread-passing crossbar group includes a wire crossbar 21 and a bobbin crossbar 22, the wire crossbar 21 is arranged above the bobbin crossbar 22, the wire crossbar is provided with a wire hole, the bobbin crossbar 22 is provided with a wire column 221 detachably connected thereto, the support column 1 includes a plurality of column sections 11 arranged separately, and the adjacent two column sections 11 are detachably connected by a connecting assembly 5, which can be two-section columns, or three-section columns, or four-section columns, etc., the wire crossbar 21 and the bobbin crossbar 22 are both provided with mounting holes 23 and slots 24 communicating with the mounting holes 23, the slots can be arranged along the length direction of the crossbar or obliquely, and the support column 1 is passed through the mounting hole 23. The guide rail 21 is fixed to the support post 1 by means of the screw thread 22, and the guide rail 22 is fixed to the support post 1 by means of the screw thread 22. The guide rail 21 is fixed to the support post 1 by means of the screw thread 22, and the guide rail 22 is fixed to the support post 1 by means of the screw thread 22.

[0027] When the locking cam 32 is in the unlock state, the locking cam 32 is locked and the locking cam 32 is locked, so that the locking cam 32 is locked. A raised portion is provided on one side surface, which may also be an inclined surface or an arc surface; the cross bar can be disassembled and assembled without the aid of tools, which is convenient and fast, saves time and effort, and is easy and quick to adjust. Compared with locking or unlocking the cross bar by cooperating with a bolt and a nut, which requires turning the nut multiple times to achieve the desired effect, the locking assembly of the present application is more convenient and quick to operate, and only needs to rotate a small angle to unlock or lock. For example, when the rotating member 31 rotates clockwise, the rotating member 31 moves on the inclined surface or the arc surface, so that one side wall of the cross bar will be squeezed and axially slide relative to the other side wall in the axial space, thereby making the slot 24 smaller, the cross bar is tightly locked and cannot move, and has good stability. When rotating in the opposite direction, the slot becomes larger, the cross bar is unlocked, and it can rotate circumferentially and slide axially relative to the support column, so that the angle of the cross bar can be adjusted or disassembled. Of course, it can also be unlocked when rotated clockwise and locked when rotated counterclockwise, depending on the specific inclined surface setting. Specifically, the cooperation between the limiting rod and the rotating member is that a receiving groove 312 is provided on the rotating member 31, and a through hole 313 is provided at the bottom of the receiving groove 312 for the limiting rod 32 to pass through. The limiting portion of the limiting rod 32 is located in the receiving groove 312 and abuts against the bottom wall of the receiving groove 312, so that the limiting portion is not exposed, which is more beautiful and safer. A lug 314 is also provided on the rotating member 31, and the lug 314 is located outside the movable groove. The setting of the lug makes it convenient for the operator to rotate the rotating member, and two lugs can be symmetrically provided, which is more convenient when rotating.

[0028] Specifically, the limit member 322 is set by a nut, and the limit rod 32 can be set by a bolt. The limit rod is threadedly matched with the limit member, and the limit member 322 and the rotating member 31 are respectively located at both ends of the limit rod 32. In this embodiment, an installation groove 25 and a movable groove 26 can be provided on both sides of the slot 24 on the wire cross bar 21 and the wire drum cross bar 22. The installation groove and the movable groove are both connected to the slot 24. The nut is provided in the installation groove 25, and the rotating member is rotatably provided in the movable groove 26. One end of the limit rod 32 passes through the slot 24 and extends to the installation groove 25 and is threadedly connected to the nut. The bottom wall of the movable groove 26 is provided with an inclined surface 20 or an arc surface or a pressure surface.

[0029] Of course, the two ends of the limiting rod 32 may also be riveted to form the limiting piece 322 and the limiting portion 321 .

[0030] Alternatively, the limiting member 322 is provided with a limiting pin, the limiting rod 32 is provided with an insertion hole, and the limiting pin is inserted into the insertion hole.

[0031] Another embodiment of the locking assembly, the locking assembly 3 includes a rotating member 31 and a limiting rod 32, the limiting rod 32 is set by a bolt, one end of the limiting rod 32 passes through the rotating member and is connected to the cross bar through the slotted thread, and the other end is provided with a limiting portion 321, the rotating member is rotatably arranged on the limiting rod and is located between the limiting portion and the outer side surface of the cross bar, the limiting portion abuts against the outer side surface of the rotating member, one of the inner side surface of the rotating member 31 and the outer side surface of the cross bar is provided with an inclined surface or an arc surface, and the other side is provided with a pressing surface to lock the rotating member. When the rotating member 31 rotates, the pressing surface cooperates with the inclined surface or the arc surface to adjust the clamping force of the cross bars on both sides of the slot 24; in this embodiment, threaded holes and movable grooves can be provided on both sides of the slot 24 on the wire cross bar 21 and the wire drum cross bar 22, and the threaded holes and the movable grooves are both connected to the slot 24. The rotating member 31 is rotated in the movable groove, and one end of the limiting rod 32 passes through the rotating member 31 and passes through the slot 24 to extend into the threaded hole and is threadedly connected to the threaded hole. An inclined surface or an arc surface or a pressing surface is provided on the bottom wall of the movable slot 26.

[0032] The thread barrel cross bar 22 is provided with a mounting channel 222, and the lower end of the thread column 221 is provided with at least two elastic hooks 223, and a gap is provided between the two adjacent elastic hooks 223 to allow elastic deformation. Each elastic hook 223 passes through the mounting channel 222 and is hooked on the bottom of the thread barrel cross bar 22 to achieve the connection between the thread column 221 and the thread barrel cross bar 22. The mounting channel 222 is provided with a movable space for each elastic hook to elastically deform inwardly so that each elastic hook is separated from the thread barrel cross bar. Each elastic hook is elastically deformed in a space, and there is a gap between adjacent elastic hooks 223. When the elastic hook is located in the mounting channel 222, each elastic hook 223 is deformed inwardly so that the elastic hook 223 can pass through the mounting channel 222. After passing through the mounting channel 222, the elastic hook 223 will rebound due to its own elasticity, and the elastic hook 223 hooks the bottom of the thread barrel cross bar 22, completing the clamping connection between the thread column 221 and the thread barrel cross bar 22. When disassembling, press each elastic hook inward to disengage it from the bottom of the spool cross bar 22, and then pull out the wire post 221 outward to remove the wire post 221 from the spool cross bar 22, making it very convenient to disassemble and assemble the wire post 221, and the wire post 221 will not be damaged after disassembly. There is also a limiting boss on the wire post, and a limiting step is provided in the installation channel. When the wire post is installed on the spool cross bar, the limiting boss contacts the limiting step to limit the wire post and prevent it from disengaging from the spool cross bar. The limiting boss The platform is integrally formed at the upper end of each elastic hook; it also includes a wire drum 244, the wire drum 224 and the wire drum cross bar 22 are both made of plastic and integrally formed, and a plurality of wire drums 224 are provided on the wire drum cross bar 22 along its length direction, which has higher strength. Unless the wire drum and the wire drum cross bar 22 are broken, the wire drum 224 and the wire drum cross bar 22 will basically not be separated. When a wire drum is provided on the wire drum cross bar, a through hole communicating with the installation channel is provided on the wire drum, and a limiting boss can also be provided in the through hole.

[0033] The connecting assembly 5 includes a sleeve 51 and a first locking sleeve 52 and a second locking sleeve 53 spirally sleeved on the outside of the sleeve 51. The sleeve 51 is provided with a first spiral portion 511, a plurality of first locking pieces 512, a second spiral portion 513 and a plurality of second locking pieces 514. The first locking piece 512 is arranged above the first spiral portion 511, and is spaced apart between two adjacent first locking pieces 512. One of the cylinders is inserted into the sleeve 51 and is located on the inner side of the first locking piece 512. The first locking sleeve 52 is sleeved on the outside of the first spiral portion 511 and the first locking piece 512, and is threadedly connected to the first spiral portion 511 to achieve connection or disassembly between the cylinder and the sleeve 51. The second locking piece 514 is arranged below the second spiral portion 513, and the two adjacent second locking pieces 514 are spaced apart. The second locking sleeve 53 is sleeved on the outside of the second spiral portion 513 and the second locking piece 514, and is threadedly connected to the second spiral portion 513 to achieve connection or disassembly of the column and the sleeve 51. The lower end of the upper column between the two adjacent columns is inserted into the upper end of the sleeve 51, and the upper end of the lower column is inserted into the lower end of the sleeve 51. The locking piece is located at the outer periphery of the column. By rotating the locking sleeve, the gap between the locking pieces is reduced, and the whole is deformed inward, thereby holding the column tightly and locking the column to achieve connection between the two columns. When disassembly is required, the locking sleeve is rotated in the opposite direction, the gap between the locking pieces becomes larger, and the column can be pulled out to achieve disassembly of the two columns. The structure is simple and disassembly and assembly are convenient and quick.

[0034] At least two of the bobbin cross bars 22 are provided, and each bobbin cross bar 22 is sequentially arranged along the vertical direction of the support column 1. The bobbin cross bar 22 is provided with a thread hole 101 or a thread guide 10 with a thread hole for guiding the sewing thread provided on the bobbin cross bar of the next layer. The thread guide 10 is detachably connected to the bobbin cross bar 22. When the thread hole is directly provided on the bobbin cross bar, a protective cover made of metal or ceramic can be provided in the thread hole. The sewing thread passes through the protective cover, so that the sewing thread will not rub against the bobbin cross bar when sliding, thereby avoiding damage to the bobbin cross bar. The sewing thread of the bobbin placed on the bobbin cross bar 22 of the next layer can be upward and downward. Pass through the first thread hole 101, and the bottom layer of the bobbin cross bar may not be provided with a guide wire. The top layer of sewing thread passes through the guide wire hole on the guide wire cross bar, so that the sewing threads are not messy and do not interfere with each other. The sewing threads are guided, and the guide wire is detachable and easy to replace when damaged. The guide wire 10 can be provided with a torsion spring, and the torsion spring is hooked on the bobbin cross bar. The spiral part in the middle of the torsion spring forms the thread hole, and the two ends of the torsion spring extend backward to form a hook 102. The bobbin cross bar 22 is provided with a slot 225 that cooperates with the hook 102 and an opening 226 for the hook 102 to enter and exit the slot 225.

[0035] The lower end of the support column 1 is provided with a clamping boss 13 and a threaded section 14, and the threaded section 14 is located at the lower end of the clamping boss 13. The threaded section 14 is threadedly connected with a clamping piece 6, and the clamping piece 6 cooperates with the clamping boss 13 to install the support column 1 on the sewing machine. The support column 1 is also provided with a gasket 15, and the gasket 15 is located on the lower end surface of the clamping boss 13. The support column 1 can be installed or disassembled by rotating the clamping piece 6, which is convenient and quick, and no other tools are required for installation. The clamping boss 13 cooperates with the clamping piece 6 to be clamped on the table top of the sewing machine or other places to realize the installation of the support column 1. The gasket 15 can play an anti-wear role and makes the structure of the support column 1 more stable and less likely to shake when it is installed on the sewing machine.

[0036] It also includes a wire passing bracket 7 and a connecting rod 4, the connecting rod 4 is installed on the support column 1, and is located between the wire cross bar and the bobbin cross bar. The connection method between the connecting rod 4 and the support column is consistent with the connection method between the wire cross bar and the bobbin cross bar. The wire passing bracket 7 is installed on the connecting rod 4 through a universal guide 8. The wire passing bracket 7 is provided with a plurality of second wire passing holes, and the sewing thread can pass through the second wire passing holes to guide and support the sewing thread. Specifically, the universal guide 8 is provided with a universal ball 81 at one end and a guide channel 82 at the other end. The wire passing bracket 7 is inserted into the guide channel 82, and the end of the connecting rod A plurality of snap-fitting pieces 41 are provided, and adjacent snap-fitting pieces 41 are arranged apart from each other, and a receiving groove for the movement of the universal ball 81 is formed between each snap-fitting piece 41. The snap-fitting piece 41 is externally threaded with a fastening sleeve 9. By rotating the fastening sleeve 9, the gap between each snap-fitting piece 41 can be reduced or increased, so that the universal guide 8 can be installed on the connecting rod or removed from the connecting rod. The universal guide 8 rotates in the receiving groove through the universal ball 81, and the angle of the wire-passing bracket 7 can be adjusted, and the orientation of the wire-passing bracket 7 can be adjusted to make the wire feeding orientation more matched with the sewing orientation. Compared with the existing wire-passing bracket 7 structure, it is more cost-effective and more convenient to install.

[0037] The thread post 221 is provided with a detachable sleeve 227 and a pressing piece 228. The pressing piece 228 is located above the sleeve 227. The pressing piece 228 is provided with a number of elastically deformable pressing pieces 229. When a wire drum is provided on the spool cross bar, the sleeve 227 is located above the wire drum 4 and is installed by itself according to the usage. It is used to fix and guide the sewing thread to ensure uniform tension of the sewing thread and prevent the sewing thread from being entangled or knotted. The sewing thread remains stable during use and the phenomenon of loose thread or broken thread during sewing is reduced. When the spool is sleeved on the thread post, the sleeve and the pressing piece are both located inside the spool. The pressing piece and the sleeve cooperate to position the spool to prevent it from sliding.

Claims

1. A thread rack structure on a sewing machine, comprising a support column (1) and a thread-passing crossbar group, wherein the thread-passing crossbar group comprises a guide wire crossbar (21) and a bobbin crossbar (22), wherein the guide wire crossbar (21) is arranged above the bobbin crossbar (22), and wherein: The wire drum cross bar (22) is provided with a wire column (221) detachably connected thereto, the support column (1) comprises a plurality of separately arranged column sections (11), and adjacent columns (11) are detachably connected via a connecting assembly (5), the wire cross bar (21) and the wire drum cross bar (22) are both provided with mounting holes (23) and slots (24) communicating with the mounting holes (23), the support column (1) is passed through the mounting holes (23), the wire cross bar (21) and the wire drum cross bar (22) are both provided with locking assemblies (3), and the locking assemblies (3) can adjust the clamping force of the cross bars on both sides of the slot (24) so ​​that the cross bars hold the support column tightly or loosen the support column (1), thereby achieving installation or removal between the wire cross bar group and the support column (1).

2. The thread rack structure on the sewing machine according to claim 1, characterized in that: The locking assembly (3) comprises a rotating member (31) and a limiting rod (32), one end of the limiting rod (32) passes through the rotating member (31) and penetrates the slot (24), and a limiting member (322) is provided on the limiting rod (32), and a limiting portion (321) is provided at the other end of the limiting rod (32), an axial limiting space is formed between the limiting member (322) and the limiting portion (321), the rotating member (31) is rotatably arranged outside the limiting rod (32) and is located between the limiting portion (321) and the cross bar, the limiting portion (321) abuts against the rotating member (31), an inclined surface (20) or an arc surface is provided on one side of the inner side surface of the rotating member (31) and the outer side surface of the cross bar, and a pressing surface is provided on the other side surface, so that when the rotating member (31) rotates, the pressing surface cooperates with the inclined surface or the arc surface to adjust the clamping force of the cross bars on both sides of the slot (24).

3. The thread rack structure on the sewing machine according to claim 2, characterized in that: The limiting member (322) is provided by a nut, and the limiting rod (32) is threadably engaged with the limiting member.

4. The thread rack structure on a sewing machine according to claim 2, characterized in that: Both ends of the limiting rod (32) are riveted to form the limiting piece (322) and the limiting portion (321).

5. The thread rack structure on a sewing machine according to claim 1, 2, 3 or 4, characterized in that: The bobbin crossbar (22) is provided with a mounting channel (222) along its vertical direction. At least two elastic hooks (223) are extended at intervals from the lower end of the bobbin column (221). Each elastic hook (223) passes through the mounting channel (222) and is hooked on the bottom of the bobbin crossbar (21) to achieve the connection between the bobbin column (221) and the bobbin crossbar (21). The mounting channel (222) is provided with a movable space for each elastic hook (223) to elastically deform inwardly so that the elastic hook (223) can be separated from the bobbin crossbar (22).

6. The thread rack structure on a sewing machine according to claim 1, 2, 3 or 4, characterized in that: The connecting assembly (5) includes a sleeve (51) and a first locking sleeve (52) and a second locking sleeve (53) which are spirally sleeved outside the sleeve (51). The sleeve (51) is provided with a first spiral portion (511), a plurality of first locking pieces (512), a second spiral portion (513) and a plurality of second locking pieces (514). The first locking piece (512) is arranged above the first spiral portion (511) and is spaced apart between two adjacent first locking pieces (512). A column is inserted into the sleeve (51) and is located on the inner side of the first locking piece (512). The first locking sleeve (52) is sleeved on the first locking piece (512). A spiral portion (511) is outside the first locking piece (512) and is threadedly connected to the first spiral portion (511) to achieve connection or disassembly of the column and the sleeve (51); a second locking piece (514) is provided below the second spiral portion (513) and is spaced apart between two adjacent second locking pieces (514); another column is inserted into the sleeve (51) and is located inside the second locking piece (514); a second locking sleeve (53) is sleeved outside the second spiral portion (513) and the second locking piece (514) and is threadedly connected to the second spiral portion (513) to achieve connection or disassembly of the column and the sleeve (51).

7. The thread rack structure on a sewing machine according to claim 1, 2, 3 or 4, characterized in that: At least two bobbin cross bars (22) are provided, and each bobbin cross bar is sequentially arranged along the vertical direction of the support column (1). The bobbin cross bars (22) are provided with a thread hole (101) for the sewing thread on the bobbin cross bar of the next layer to pass through, or a thread guide (10) with a thread hole, and the thread guide (10) is detachably connected to the bobbin cross bar (22).

8. The thread rack structure for a sewing machine according to claim 7, characterized in that: The wire guide (10) is provided with a torsion spring, a spiral portion in the middle of the torsion spring forms the wire hole, both ends of the torsion spring extend backward to form a hook (102), and the wire drum cross bar (22) is provided with a slot (225) cooperating with the hook (102) and an opening (226) for the hook (102) to enter and exit the slot (225).

9. The thread rack structure for a sewing machine according to claim 1, 2, 3 or 4, characterized in that: The lower end of the support column (1) is provided with a clamping boss (13) and a threaded section (14), the threaded section (14) is located at the lower end of the clamping boss (13), and a clamping member (6) is threadedly connected to the threaded section (14), and the clamping member (6) cooperates with the clamping boss (13) to install the support column (1) on the sewing machine. The support column (1) is also provided with a gasket (15), and the gasket (15) is located on the lower end surface of the clamping boss (13).

10. The thread rack structure on a sewing machine according to claim 1, 2, 3 or 4, characterized in that: The utility model also includes a wire passing bracket (7) and a connecting rod (4), wherein the connecting rod (4) is mounted on the support column (1), and the wire passing bracket (7) is mounted on the connecting rod (4) through a universal guide (8), wherein one end of the universal guide (8) is provided with a universal ball (81), and the other end is provided with a guide channel (82), wherein the wire passing bracket (7) is passed through the guide channel (82), and the end of the connecting rod (4) is provided with a plurality of buckling pieces (41), wherein adjacent buckling pieces (41) are spaced apart, and a receiving groove for the universal ball (81) to move is formed between each buckling piece (41), and the buckling piece (41) is externally threaded with a fastening sleeve (9).

11. The thread rack structure for a sewing machine according to claim 1, 2, 3 or 4, characterized in that: A detachable sleeve (227) and a pressing piece (228) are sleeved on the wire column (221). The pressing piece (228) is located above the sleeve (227). A plurality of elastically deformable pressing pieces (229) are provided on the pressing piece (228).

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