Thread stand structure on sewing machine

Abstract

The utility model relates to a thread stand structure on a sewing machine, which comprises a supporting column and a thread passing cross rod group arranged on the supporting column, the thread passing cross rod group comprises a bobbin cross rod and a thread guide cross rod, and the thread guide cross rod is provided with a first thread guide hole. Each of the bobbin cross rod and the wire cross rod comprises at least two first rod bodies, at least two second rod bodies and at least two third rod bodies, the first rod bodies and the second rod bodies are arranged in parallel, the third rod bodies are connected with the first rod bodies and the second rod bodies, mounting holes and open grooves are formed in the third rod bodies, the supporting columns are inserted into the mounting holes, and locking assemblies are arranged on the rod bodies. The locking assembly can adjust the clamping force of the rod bodies on the two sides of the open groove so that the transverse rod can tightly hold the supporting column or loosen the supporting column. 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 column are convenient and fast to disassemble and assemble, the bobbin transverse rods and the thread guiding transverse rods can be provided with a plurality of parallel rod bodies, and therefore the number of bobbins is increased, and the height of the supporting column does not need to be increased.

Description

Technical Field

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

[0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material, so that one or more layers of sewing material are interwoven or sewn together. It can sew fabrics such as cotton, linen, silk, wool, and synthetic fibers, and products such as leather, plastic, and paper. Sewing thread is an important factor in connecting such products. In order to facilitate the use of sewing thread on the sewing machine, a sewing machine thread stand is provided at a specific position on the sewing machine.

[0003] The thread rack currently on the market includes a support column and a thread-passing crossbar group fixed on the support column. The thread-passing crossbar group is divided into a guide crossbar and a spool crossbar. The spool crossbar is used to place the thread reel, and the spool is used to fix the thread reel, or the thread reel can be directly placed on the spool crossbar. The guide crossbar is located above the spool crossbar and is used to guide the sewing thread on the spool crossbar.

[0004] However, the existing wire rack has a complex assembly structure between the wire crossbar and the support column, which is inconvenient to assemble and disassemble. In addition, the wire spool crossbars are arranged vertically on the support column in sequence. If more wire spools are needed, the number of wire spool crossbars and the height of the support column must be increased, which leads to poor stability of the overall wire rack. In addition, when adjusting the crossbar spacing, each wire spool crossbar needs to be adjusted, which is very inconvenient. Utility Model Content

[0005] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a thread rack structure on a sewing machine, and the disassembly and assembly between the thread passing cross bar group and the support column are convenient and quick, and each bobbin cross bar and the guide wire cross bar can be provided with multiple parallel rod bodies, so that when the number of bobbins is increased, there is no need to increase the height of the support column.

[0006] The technical solution of the utility model is: a thread rack structure on a sewing machine, comprising a support column and a thread-passing cross bar group arranged on the support column, the thread-passing cross bar group comprising a bobbin cross bar and a guide wire cross bar, the bobbin cross bar is provided with a thread column for installing the bobbin, the guide wire cross bar is provided with a first guide wire hole, and the bobbin cross bar and the guide wire cross bar each include at least two parallel first rod bodies and a second rod body and a third rod body connecting the first rod body and the second rod body, the first rod body and the second rod body are respectively located on both sides of the support column, the thread column is arranged on the first rod body and the second rod body of the bobbin cross bar, the third rod body is provided with a mounting hole and a slot, the support column is inserted into the mounting hole, and a locking assembly is provided on the rod body, the locking assembly can adjust the clamping force of the third rod body on both sides of the slot, so that the cross bar hugs the support column or loosens the support column, thereby realizing the installation or disassembly between the thread-passing cross bar group and the support column.

[0007] By adopting the above technical solution, each wire spool cross bar and conductor cross bar is provided with at least a first rod body and a second rod body in parallel, and a wire post is provided on the first rod body and the second rod body of each wire spool cross bar, and multiple wire posts can be set along the length direction of the corresponding rod body, so that multiple wire spools can be installed at the same time, and more wire spools can be installed without increasing the height of the support column, so that the wire rack has good stability, and the disassembly between the wire spool cross bar and the conductor cross bar and the support column is convenient and quick, and the installation or disassembly between the cross bar and the support column can be quickly realized.

[0008] The utility model is further configured as follows: the wire cross bar and the wire drum cross bar both include two third rod bodies, the two ends of the two third rod bodies are respectively connected to the first rod body and the second rod body, the two third rod bodies are both provided with the mounting holes and slots, the support columns are also correspondingly provided with two, which are passed through the corresponding mounting holes, and each third rod body is provided with a locking assembly.

[0009] By further adopting the above-mentioned setting, the stability of the entire thread rack is improved, and the firmness of the thread rack will not be affected when the sewing thread is pulled. At the same time, the structure of the single bobbin cross bar and the conductor cross bar is also more solid, and the third rod body can be integrally formed with the two adjacent rod bodies.

[0010] The present invention is further configured as follows: the locking assembly includes a rotating member and a limiting rod, one end of the limiting rod passes through the rotating member and through the slot, and a limiting member is provided on the limiting rod, and a limiting portion is provided at the other end of the limiting rod, an axial limiting space is formed between the limiting member and the limiting portion, the rotating member is rotatably arranged on the limiting rod and is located between the limiting portion and the rod body, the limiting portion is pressed against the rotating member, and an inclined surface or an arc surface is provided on one side of the inner side surface of the rotating member and the outer side surface of the rod body, and a pressing surface is provided on the other side, so that when the rotating member rotates, the pressing surface cooperates with the inclined surface or the arc surface to adjust the clamping force of the rod bodies on both sides of the slot to realize the installation or disassembly of the cross bar.

[0011] By adopting 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 rod body. The cross bar can be disassembled and assembled without the aid of tools, which is convenient and fast, saving time and effort, and easy and quick to adjust. When the rotating part rotates, the pressing surface cooperates with the inclined surface or the arc surface, and one side wall of the rod body slides axially on the limit rod relative to the other side wall, thereby making the slot larger or smaller. When unlocked, it can slide axially relative to the support column to achieve disassembly. When locked, it cannot move and has good stability.

[0012] The present invention is further configured as follows: the wire post is detachably mounted on the wire spool cross bar; a mounting channel is provided on the wire spool cross bar; at least two elastic hooks are provided on the lower end portion of the wire post; a gap is provided between adjacent elastic hooks for 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; a movable space is provided in the mounting channel for each elastic hook to elastically deform inwardly to enable the elastic hook to detach from the wire spool cross bar.

[0013] 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.

[0014] The second locking sleeve is arranged outside the second spiral portion and is threadably connected to the second locking piece so as to realize the connection or disassembly of the column and the sleeve.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] The present invention is further configured as follows: it also includes 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, the end of the connecting rod is provided with a plurality of snap-fit ​​plates, adjacent two snap-fit ​​plates are arranged separately, and a receiving groove for the movement of the universal ball is formed between the snap-fit ​​plates, and the external thread of the snap-fit ​​plate is connected with a fastening sleeve.

[0019] The above-mentioned further arrangement is adopted, and a plurality of second wire holes are provided on the wire-passing bracket, through which the sewing thread can pass, guiding and supporting the sewing thread, and the wire-passing bracket can be rotated relative to the connecting rod to adjust the orientation of the wire-passing bracket so that the wire feeding orientation is more matched with the sewing orientation. 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 wire-passing bracket can be adjusted. Compared with the existing wire-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 diagram of a specific embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of a spool crossbar according to a specific embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the third rod on the spool crossbar in a specific embodiment of the present utility model;

[0023] Figure 4 This is a schematic diagram of a conductor crossbar according to a specific embodiment of the present utility model;

[0024] Figure 5 This is a schematic diagram of an inclined surface or arc surface on a rotating member in a specific embodiment of the utility model;

[0025] Figure 6This is a front view of a rotating member according to a specific embodiment of the present utility model;

[0026] Figure 7 This is a schematic diagram of the cooperation between the limiting rod and the nut in a specific embodiment of the utility model;

[0027] Figure 8 This is a schematic diagram of riveting the limiting portion and limiting member in a specific embodiment of the utility model;

[0028] Figure 9 This is a schematic diagram of a support column and a sleeve according to a specific embodiment of the present utility model;

[0029] Figure 10 This is an exploded view of a connection assembly according to a specific embodiment of the present invention;

[0030] Figure 11 This is a schematic diagram of a connecting rod and a universal guide member according to a specific embodiment of the present utility model;

[0031] Figure 12 This is a schematic diagram of a wire post, a sleeve and a pressing member according to a specific embodiment of the present utility model;

[0032] Figure 13 This is a schematic diagram of a cable drum according to a specific embodiment of the present invention.

[0033] In the figure, 1, support column; 11, column; 111, support seat; 2, wire drum cross bar; 20, wire hole; 21, wire column; 211, elastic hook; 212, positioning boss; 213, sleeve; 214, pressing member; 22, first rod; 23, second rod; 24, third rod; 25, mounting hole; 26, slot; 27, mounting slot; 28, movable slot; 29, mounting channel; 3, wire cross bar; 31, first wire hole; 4, locking assembly; 41, rotating member; 411, accommodating slot; 412, through hole; 42, Limit rod; 421, limit member; 422, limit portion; 5, inclined surface; 6, wire reel; 61, positioning step; 62, perforation; 7, connecting assembly; 71, sleeve; 711, first spiral portion; 712, first locking plate; 713, second spiral portion; 714, second locking plate; 72, first locking sleeve; 73, second locking sleeve; 8, wire passing bracket; 81, second wire hole; 9, connecting rod; 91, snap-fit ​​plate; 92, accommodating groove; 93, fastening sleeve; 10, universal guide; 101, universal ball; 102, guide channel. DETAILED DESCRIPTION

[0034] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0035] It should be noted that in the description of this utility model, 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 in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the terms "first," "second," and so on, used in this utility model 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 utility model, "several" means at least two, such as two or three, unless otherwise specifically defined.

[0037] 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 technical personnel in this field can implement it. When the combination of technical solutions is 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 this utility model.

[0038] like Figure 1-13As shown, a thread rack structure on a sewing machine includes a support column 1 and a thread-passing crossbar group arranged on the support column 1, the thread-passing crossbar group includes a bobbin crossbar 2 and a guide wire crossbar 3, the bobbin crossbar 2 is provided with a thread column 21 for mounting a bobbin, the guide wire crossbar 3 is provided with a first guide wire hole 31, the bobbin crossbar 2 and the guide wire crossbar 3 each include at least two parallel first rod bodies 22 and second rod bodies 23 and a third rod body 24 connecting the first rod body 22 and the second rod body 23, the first rod body 22 and the second rod body 23 are respectively located on both sides of the support column 1, the third rod body 24 can be integrally formed with the two adjacent rod bodies, or can be fixedly connected, the thread column 21 is provided on the first rod body 22 and the second rod body 23 of the bobbin crossbar 2, the third rod body 24 is provided with a mounting hole 25 and a slot 26, the support column 1 is inserted into the mounting hole 25, A locking assembly 4 is provided on the rod body, and the locking assembly 4 can adjust the clamping force of the third rod body 24 on both sides of the slot 26 to make the cross bar hug the support column 1 or loosen the support column 1, thereby realizing the installation or disassembly between the wire cross bar group and the support column 1. Each wire spool cross bar and the wire cross bar are provided with at least a first rod body 22 and a second rod body 23 in parallel, or multiple rod bodies can be set in parallel, and the adjacent two rod bodies are connected by the third rod body. The first rod body 22 and the second rod body 23 on the wire spool cross bar are provided with a wire post 21, and multiple wire posts 21 can be set along the length direction of the rod body. In this way, multiple wire spools can be installed at the same time, and more wire spools can be installed without increasing the height of the support column 1, so that the wire rack has good stability, and the wire spool cross bar 2 and the wire cross bar 3 are convenient and quick to assemble and disassemble from the support column 1, and the installation or disassembly between the cross bar and the support column 1 can be quickly realized.

[0039] Specifically, the wire cross bar 3 and the bobbin cross bar 2 both include two third rod bodies 24, the two ends of the two third rod bodies 24 are respectively connected to the first rod body 22 and the second rod body 23, and the two third rod bodies 24 are provided with the aforementioned mounting holes 25 and slots 26. The support column 1 is also correspondingly provided with two, which are passed through the corresponding mounting holes 25, and each third rod body 24 is provided with a locking assembly 4, so that the stability of the entire wire rack is better, and the sewing thread will not affect the firmness of the wire rack when being pulled. At the same time, the structure of the single bobbin cross bar 2 and the wire cross bar 3 is also more secure, and the third rod body 24 can be integrally formed with its two adjacent rod bodies.

[0040] In the embodiment 1 of the locking assembly 4, the locking assembly 4 includes a rotating member 41 and a limiting rod 42. One end of the limiting rod 42 passes through the rotating member 41 and passes through the slot 26. A limiting member 421 is provided on the limiting rod 42. A limiting portion 422 is provided at the other end of the limiting rod 42. An axial limiting space is formed between the limiting member 421 and the limiting portion 422. The rotating member 41 is rotatably arranged on the limiting rod 42 and is located between the limiting portion 422 and the rod body. The limiting portion 422 is pressed against the rotating member 41. The inner side surface of the rotating member 41 and the outer side surface of the rod body are One side surface of the cross bar is provided with an inclined surface 5 or an arc surface, and the other side surface is provided with a pressing surface, so that when the rotating member 41 rotates, the pressing surface cooperates with the inclined surface 5 or the arc surface, and the clamping force of the rod body on both sides of the slot 26 is adjusted to realize the installation or removal of the cross bar. The size of the slot 26 opening can be adjusted by rotating the rotating member 41, thereby adjusting the clamping force of the rod body. The pressing surface can be a convex portion set on one side surface, or it can be an inclined surface 5 or an arc surface; the cross bar can be disassembled and assembled without the help of tools, which is convenient and fast, saving time and effort, and easy to adjust. Compared with the installation by the combination of bolts and nuts When locking or unlocking the bobbin crossbar 2 and the conductor crossbar 3, it is necessary to rotate the nut multiple times to achieve the desired effect. The locking assembly 4 of the present application is more convenient and quick to operate. It only needs to rotate a smaller angle to unlock or lock. For example, when the rotating member 41 rotates clockwise, the rotating member 41 moves on the inclined surface 5 or the arc surface, so that one side wall of the rod body will be squeezed and axially slide relative to the other side wall in the axial space, thereby making the slot 26 smaller, the rod body is tightly locked and cannot move, and has good stability. When rotating in the opposite direction, the slot 26 becomes larger and unlocked, and can slide axially relative to the support column 1. , to achieve disassembly, of course, it can also be unlocked when rotated clockwise and locked when rotated counterclockwise. According to the specific inclined surface setting, a lug can also be provided on the rotating member 41 to facilitate driving the rotating member 41 to rotate. Specifically, the cooperation between the limiting rod 42 and the rotating member 41, the rotating member 41 is provided with a receiving groove 411, and the bottom of the receiving groove 411 is provided with a through hole 412 for the limiting rod 42 to pass through. The limiting portion 422 of the limiting rod 42 is located in the receiving groove 411 and abuts against the bottom wall of the receiving groove 411, so that the limiting portion 422 is not exposed, which is more beautiful and safer.

[0041] Specifically, the limiting member 421 is set by a nut, and the limiting rod 42 can be set by a bolt. The nut and the rotating member 41 are respectively located at the two ends of the limiting rod 42. In this embodiment, a mounting groove 27 and a movable groove 28 can be provided on both sides of the slot 26 on the corresponding rod body. The mounting groove 27 and the movable groove 28 are both connected to the slot 26. The nut is set in the mounting groove 27, and the rotating member 41 is rotatably set in the movable groove 28. One end of the limiting rod 42 passes through the slot 26 and extends to the mounting groove 27 to be threadedly connected to the nut. The bottom wall of the movable groove 28 is provided with an inclined surface 5 or an arc surface or a pressure surface.

[0042] Of course, the two ends of the limiting rod 42 may also be riveted to form the limiting piece 421 and the limiting portion 422 .

[0043] Alternatively, the limiting member 421 is provided with a limiting pin, the limiting rod 42 is provided with an insertion hole, and the limiting pin is inserted into the insertion hole.

[0044] Embodiment 2 of the locking assembly 4, the locking assembly 4 includes a rotating member 41 and a limiting rod 42, the limiting rod 42 is set by a bolt, one end of the limiting rod 42 passes through the rotating member 41 and passes through the slot 26 to be threadedly connected to the rod body, and the other end is provided with a limiting portion 422, the rotating member 41 is rotatably arranged on the limiting rod 42, and is located between the limiting portion 422 and the rod body, the limiting portion 422 abuts against the outer surface of the rotating member 41, one of the inner side surface of the rotating member 41 and the outer side surface of the rod body is provided with an inclined surface 5 or an arc surface, and the other side is provided with The pressing surface cooperates with the inclined surface 5 or the arc surface when the rotating part 41 rotates to adjust the clamping force of the rod body on both sides of the slot 26; in this embodiment, a threaded hole and a movable groove 28 can also be provided on the corresponding rod body on both sides of the slot 26, and the threaded hole and the movable groove 28 are both connected to the slot 26. The rotating part 41 is rotated in the movable groove 28, and one end of the limiting rod 42 passes through the rotating part 41 and passes through the slot 26 to extend into the threaded hole and is threadedly connected to the threaded hole. An inclined surface 5 or an arc surface or a pressing surface is provided on the bottom wall of the movable groove 28.

[0045] The wire column 21 is detachably mounted on the wire drum cross bar 2. The wire drum cross bar 2 is provided with a mounting channel 29. The lower end of the wire column 21 is provided with at least two elastic hooks 211. A gap is provided between the two adjacent elastic hooks 211 for elastic deformation. Each elastic hook 211 passes through the mounting channel 29 and is hooked on the bottom of the wire drum cross bar 2 to achieve the connection between the wire column 21 and the wire drum cross bar 2. The mounting channel 29 is provided with an activity space for each elastic hook 211 to elastically deform inwardly so that the elastic hook 211 can be separated from the wire drum cross bar 2. There is a gap between adjacent elastic hooks 211. When the elastic hook 211 is located in the mounting channel 29, each elastic hook The hook 211 is deformed inwardly so that the elastic hook 211 can pass through the installation channel 29. After passing through the installation channel 29, the elastic hook 211 will rebound due to its own elasticity, and the elastic hook 211 will hook the bottom of the spool cross bar 2, completing the connection between the wire post 21 and the spool cross bar 2. When disassembling, the elastic hooks 211 are pressed inward to separate them from the bottom of the spool cross bar 2, and then the wire post 21 can be pulled out to remove the wire post 21 from the spool cross bar 2, making the disassembly and assembly of the wire post 21 very convenient and the wire post 21 will not be damaged after disassembly. A wire drum 6 can also be provided on the spool cross bar 2. The wire drum 6 and the spool cross bar 2 are both made of plastic. The wire drum can be It is integrally formed with the wire drum cross bar and can also be detachably connected. For example, a slot is provided on the wire drum cross bar, and the bottom of the wire drum is inserted into the slot. A positioning step 61 and a through-hole 62 communicating with the installation channel 29 are provided on the wire drum 6. A positioning boss 212 is provided above each elastic hook 211 on the wire column 21. When the wire column 21 is installed, the elastic hook 211 passes through the through-hole 62 and enters the installation channel 29. When the hook is hooked on the bottom of the wire drum cross bar 2 in the installation channel 29, the positioning boss 212 abuts against the positioning step 61, and the wire column 21 is axially positioned to prevent the wire column 21 from being separated from the wire drum cross bar 2 when in use. A sleeve 213 is also sleeved on the wire column 21. And a pressing piece 214, the pressing piece 214 is located above the sleeve 213, and a number of elastically deformable pressing pieces are provided on the pressing piece 214. When a wire drum 6 is provided on the bobbin cross bar 2, the sleeve 213 is located above the wire drum 6 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, prevent the sewing thread from being entangled or knotted, and keep the sewing thread stable during use, reducing the loose or broken thread during sewing. When the bobbin is sleeved on the thread column 21, the sleeve 213 and the pressing piece 214 are both located in the bobbin, and the pressing piece 214 and the sleeve 213 cooperate to position the bobbin to prevent it from sliding.

[0046] The support column 1 includes a plurality of column sections 11 that are separately arranged. Two adjacent column sections 11 are detachably connected by a connecting assembly 7. The connecting assembly 7 includes a sleeve 71 and a first locking sleeve and a second locking sleeve 73 that are spirally sleeved outside the sleeve 71. The sleeve 71 is provided with a first spiral portion 711, a plurality of first locking pieces 712, a second spiral portion 713 and a plurality of second locking pieces 714. The first locking piece 712 is provided above the first spiral portion 711. Adjacent The two first locking pieces 712 are spaced apart, and one of the cylinders 11 is inserted into the sleeve 71 and is located on the inner side of the first locking piece 712. The first locking sleeve is sleeved on the outside of the first spiral portion 711 and the first locking piece 712, and is threadedly connected to the first spiral portion 711 to achieve connection or disassembly of the cylinder 11 and the sleeve 71. The second locking piece 714 is provided below the second spiral portion 713, and the two adjacent second locking pieces 714 are spaced apart. The other cylinder 11 is inserted The second locking sleeve 73 is sleeved on the second spiral portion 713 and the outside of the second locking piece 714, and is threadedly connected to the second spiral portion 713 to achieve the connection or disassembly of the column 11 and the sleeve 71. The lower end of the upper column 11 between the two adjacent columns 11 is inserted into the upper end of the sleeve 71, and the upper end of the lower column 11 is inserted into the lower end of the sleeve 71. The locking piece is located on the outer periphery of the column 11. By rotating the locking sleeve, the locking piece is tightened. The gap between them is reduced, and the whole body is deformed inward, hugging the column 11 and locking the column 11 to achieve the connection between the two columns 11. When disassembly is required, the locking sleeve is rotated in the opposite direction, and the gap between the locking pieces becomes larger, and the column 11 can be pulled out to achieve the disassembly of the two columns 11. The structure is simple and the disassembly and assembly are convenient and quick. The support seat 111 is threadedly connected to the lower end of the column 11, and a plurality of threaded holes are provided on the support seat 111. Fasteners are inserted into the threaded holes to install the thread rack on the sewing machine.

[0047] At least two bobbin cross bars 2 are provided, and each bobbin cross bar 2 is sequentially arranged along the vertical direction of the support column 1. The bobbin cross bar 2 is provided with a thread hole 20 for the sewing thread on the next layer of bobbin cross bar 2 to pass through, or a thread guide with a thread hole 20. The thread guide is detachably connected to the bobbin cross bar 2. When the thread hole 20 is directly provided on the bobbin cross bar 2, a protective cover can be installed in the thread hole 20. The protective cover can be made of metal or ceramic to protect the thread hole 20 and prevent the sewing thread from passing through. After sliding in the thread hole 20 and being used for a long time, the thread hole 20 may break. The wire guide can be set with a torsion spring. The spiral part in the middle of the torsion spring forms the thread hole 20. The two ends of the torsion spring are bent to form a hook, which is hooked on the bobbin cross bar 2. The sewing thread of the bobbin placed on the lower layer of bobbin cross bar 2 can go upward and pass through the thread hole 20 of the upper layer. The wire guide may not be set on the bottom bobbin cross bar 2 to guide the sewing thread. The wire guide is detachable and easy to replace when damaged.

[0048] It also includes a wire bracket 8 and a connecting rod 9, the connecting rod 9 is installed on the support column 1, the wire bracket 8 is installed on the connecting rod 9 through a universal guide 10, the wire bracket 8 is provided with a plurality of second wire holes 81, the sewing thread can pass through the second wire holes 81, and the sewing thread is guided and supported. The universal guide 10 is provided with a universal ball 101 at one end and a guide channel 102 at the other end. The wire bracket 8 is inserted into the guide channel 102, and the end of the connecting rod 9 is provided with a plurality of buckle pieces 9 1. The two adjacent buckle pieces 91 are separated and arranged, and a receiving groove 92 for the universal ball 101 to move is formed between each buckle piece 91. The buckle piece 91 is externally threaded with a fastening sleeve 93. When multiple bobbin cross bars 2 are provided, multiple groups of wire brackets 8 and connecting rods 9 can be provided. The wire bracket 8 is provided between the two adjacent bobbin cross bars 2. The sewing thread on the lower bobbin cross bar passes through the wire hole on the upper bobbin cross bar, and then passes through the second wire hole on the wire bracket provided between the two adjacent bobbin cross bars. The bobbin cross bar 2 on the top layer A set of wire passing brackets 8 is also provided between the wire cross bar 3. After the sewing thread on the topmost spool cross bar 2 passes upward through the first wire hole on the wire cross bar, it passes through the second wire hole on the wire passing bracket provided on the topmost spool cross bar and the wire cross bar. This ensures that when multiple spools are provided, the sewing threads are not mixed up. The installation method between the connecting rod 9 and the support column 1 is the same as that of the spool cross bar 2. Both are installed through the locking assembly 4. When two support columns 1 are provided, the connecting rod 9 is installed on one of the support columns 1. Yes, and the wire-passing bracket 8 can be rotated relative to the connecting rod 9 to adjust the orientation of the wire-passing bracket 8 so that the wire feeding orientation is more matched with the sewing orientation. By rotating the fastening sleeve 93, the gap between the snap-fit ​​pieces 91 can be reduced or increased, so that the universal guide 10 can be installed on the connecting rod 9 or removed from the connecting rod 9. The universal guide 10 rotates in the receiving groove 92 through the universal ball 101, and the angle of the wire-passing bracket 8 can be adjusted. Compared with the existing wire-passing bracket 8 structure, it is more cost-effective and more convenient to install.

Claims

1. A thread rack structure on a sewing machine, comprising a support column (1) and a thread-passing crossbar group arranged on the support column (1), wherein the thread-passing crossbar group comprises a bobbin crossbar (2) and a guide wire crossbar (3), wherein the bobbin crossbar (2) is provided with a thread column (21) for mounting a bobbin, and the guide wire crossbar (3) is provided with a first guide wire hole (31), characterized in that: The bobbin crossbar (2) and the conductor crossbar (3) both comprise at least two parallel first rod bodies (22) and second rod bodies (23) and a third rod body (24) connecting the first rod body (22) and the second rod body (23), respectively located on both sides of the support column (1), the wire column (21) being arranged on the first rod body (22) and the second rod body (23) of the bobbin crossbar (2), the third rod body (24) being provided with a mounting hole (25) and a slot (26), the support column (1) being inserted into the mounting hole (25), the third rod body (24) being provided with a locking assembly (4), the locking assembly (4) being capable of adjusting the clamping force of the third rod body (24) on both sides of the slot (26) so that the crossbar can hold the support column (1) or release the support column (1), thereby realizing the installation or removal between the wire crossbar group and the support column (1).

2. The thread rack structure on the sewing machine according to claim 1, characterized in that: The wire cross bar (3) and the wire drum cross bar (2) both include two third rod bodies (24), the two ends of the two third rod bodies (24) are respectively connected to the first rod body (22) and the second rod body (23), and the two third rod bodies (24) are both provided with the aforementioned mounting holes (25) and slots (26). The support columns (1) are also correspondingly provided with two and are inserted into the corresponding mounting holes (25). Each third rod body (24) is provided with a locking assembly (4).

3. The thread rack structure on a sewing machine according to claim 1 or 2, characterized in that: The locking assembly (4) includes a rotating member (41) and a limiting rod (42), one end of the limiting rod (42) passes through the rotating member (41) and penetrates the slot (26), and a limiting member (421) is provided on the limiting rod (42), and a limiting portion (422) is provided on the other end of the limiting rod (42), an axial limiting space is formed between the limiting member (421) and the limiting portion (422), the rotating member (41) is rotatably arranged on the limiting rod (42), and is located between the limiting portion (422) and the rod body, the limiting portion (422) is pressed against the rotating member (41), and an inclined surface (5) or an arc surface is provided on one side of the inner side surface of the rotating member (41) and the outer side surface of the rod body, and a pressing surface is provided on the other side surface, so that when the rotating member (41) rotates, the pressing surface cooperates with the inclined surface (5) or the arc surface to adjust the clamping force of the rod body on both sides of the slot (26) to achieve installation or removal of the cross bar.

4. The thread rack structure on a sewing machine according to claim 3, characterized in that: The limiting member (421) is provided with a nut, and the limiting rod (42) is threadedly engaged with the limiting member (421).

5. The thread rack structure on a sewing machine according to claim 3, characterized in that: Both ends of the limiting rod (42) are riveted to form the limiting portion (422) and the limiting member (421).

6. The thread rack structure for a sewing machine according to claim 1 or 2, characterized in that: The wire column (21) is detachably mounted on the wire drum cross bar (2). The wire drum cross bar (2) is provided with a mounting channel (29). The lower end of the wire column (21) is provided with at least two elastic hooks (211). A gap is provided between two adjacent elastic hooks (211) to facilitate elastic deformation. Each elastic hook (211) passes through the mounting channel (29) and is hooked on the bottom of the wire drum cross bar (2) to achieve connection between the wire column (21) and the wire drum cross bar (2). The mounting channel (29) is provided with a movable space for each elastic hook (211) to elastically deform inwardly so as to separate the elastic hook (211) from the wire drum cross bar (2).

7. The thread rack structure for a sewing machine according to claim 1 or 2, characterized in that: The support column (1) includes a plurality of column sections (11) that are separately arranged. Two adjacent column sections (11) are detachably connected via a connecting assembly (7). The connecting assembly (7) includes a sleeve (71) and a first locking sleeve and a second locking sleeve (73) that are spirally sleeved outside the sleeve (71). The sleeve (71) is provided with a first spiral portion (711), a plurality of first locking pieces (712), a second spiral portion (713) and a plurality of second locking pieces (714). The first locking piece (712) is arranged above the first spiral portion (711) and is spaced apart between two adjacent first locking pieces (712). One of the column sections (11) is inserted into the sleeve (71) and is located at the first locking piece (714). 12) inside, the first locking sleeve is sleeved on the outside of the first spiral portion (711) and the first locking piece (712), and is threadedly connected to the first spiral portion (711) to achieve connection or disassembly of the column (11) and the sleeve (71), the second locking piece (714) is arranged below the second spiral portion (713), and is spaced apart between two adjacent second locking pieces (714), the other column (11) is inserted into the sleeve (71) and is located on the inside of the second locking piece (714), the second locking sleeve (73) is sleeved on the outside of the second spiral portion (713) and the second locking piece (714), and is threadedly connected to the second spiral portion (713) to achieve connection or disassembly of the column (11) and the sleeve (71).

8. The thread rack structure for a sewing machine according to claim 7, characterized in that: A support seat (111) is threadedly connected to the lowermost column (11), and a plurality of threaded holes are provided on the support seat (111).

9. The thread rack structure for a sewing machine according to claim 1 or 2, characterized in that: At least two bobbin cross bars (2) are provided, and each bobbin cross bar (2) is sequentially arranged along the vertical direction of the support column (1). The bobbin cross bars (2) are provided with thread holes (20) for the sewing thread on the next layer of bobbin cross bars (2) to pass through, or thread guides with thread holes (20), and the thread guides are detachably connected to the bobbin cross bars (2).

10. The thread rack structure for a sewing machine according to claim 1 or 2, characterized in that: The utility model also includes a wire passing bracket (8) and a connecting rod (9), wherein the connecting rod (9) is mounted on the support column (1), and the wire passing bracket (8) is mounted on the connecting rod (9) through a universal guide (10), wherein one end of the universal guide (10) is provided with a universal ball (101), and the other end is provided with a guide channel (102), wherein the wire passing bracket (8) is passed through the guide channel (102), and the end of the connecting rod (9) is provided with a plurality of snap-fit ​​pieces (91), wherein adjacent snap-fit ​​pieces (91) are spaced apart, and a receiving groove (92) for the universal ball (101) to move is formed between each snap-fit ​​piece (91), and a fastening sleeve (93) is connected to the external thread of the snap-fit ​​piece (91).

Images