CN214644316U - Automatic cutting machine for back buttons of underwear - Google Patents

Abstract

The utility model relates to an automatic guillootine of underwear back dunk, belong to underwear processing equipment's field, it includes the organism, install the push mechanism who is used for carrying back dunk belt location on the organism, install the workstation on the organism, two location briquetting are installed at the interval on the workstation, the constant head tank that supplies back dunk belt edge cloth to penetrate is seted up to the side bottom that two location briquetting are close to each other, be provided with on the organism and be used for adjusting the workstation along the adjusting part that perpendicular to back dunk belt direction of delivery removed, install the mechanism that cuts that is used for cutting back dunk belt on the organism. This application can carry out the processing of cutting with automizing to back of the body cingulum, improves and cuts efficiency, and can adjust the back of the body cingulum and cutting die's relative position, improves the accuracy of cutting of back of the body cingulum.

Description

Automatic cutting machine for back buttons of underwear

Technical Field

The application relates to the field of underwear processing equipment, in particular to an automatic underwear back button cutting machine.

Background

The back button of the underwear is usually made by continuous sewing, i.e. the fastener is sewn on a long strip-shaped cloth to form a back button belt, and after the sewing is finished, the back button belt needs to be cut into small back buttons.

Most of the functions of the traditional cutting machine need manual intervention, workers need to align a cutting die to a position where the back buckle belt is to be cut, and then the cutting machine is driven to descend to punch the cutting die, so that the back buckle belt is cut into small blocks.

In view of the related art in the above, the inventors consider that there are drawbacks in that: artificially place cutting die and lead to the fact the punching press position inaccurate on the back dunk area easily, lead to cutting die and back dunk area dislocation, not only damage cutting die easily, increased the defective rate of back dunk, cut inefficiency moreover, be unfavorable for the mass production of back dunk.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the application provides an automatic guillootine of underwear back strap, can carry out cutting process to the back strap with automizing, improves cutting efficiency, and can adjust the relative position of back strap and cutting die, improves the accuracy of cutting of back strap.

The application provides a pair of automatic guillootine of underwear back dunk adopts following technical scheme:

the utility model provides an automatic guillootine is detained to underwear back of body, includes the organism, install the push mechanism who is used for carrying back of the body cingulum location on the organism, install the workstation on the organism, two location briquetting are installed at the interval on the workstation, two the confession has been seted up to the side bottom that the location briquetting is close to each other the constant head tank that back of the body cingulum edge cloth penetrated, be provided with on the organism and be used for adjusting the workstation is along the perpendicular to the back of the body detains the adjusting part that direction of delivery removed, it is right to install on the organism the cutting mechanism that back of the body cingulum cut.

Through adopting above-mentioned technical scheme, the back buckle area penetrates can be prescribed a limit to the shift position by the locating block in the constant head tank, make the back buckle area be difficult for the skew moving direction in push mechanism's transport, the improvement cuts the stability that the mechanism cuts the back buckle area, the workstation can horizontal migration through adjusting part, with this adjust the back buckle area with cut the relative position of mechanism, thereby improve the accuracy that the back buckle area cut, cut the mechanism and push mechanism and coordinate the function, the automation of cutting of back buckle area has been realized, the efficiency of cutting of back buckle area has been improved.

Preferably, push mechanism rotates including removing the seat and connects reciprocating lever on removing the seat slides and wears to establish connecting block on the reciprocating lever is installed be used for fixing on the reciprocating lever the setting element of connecting block is fixed location push rod on the connecting block, and install be used for the drive on the organism remove the drive assembly of the horizontal intermittent type reciprocating motion of seat, wherein, the bottom of location push rod contacts with fastener one side of back of the body area.

Through adopting above-mentioned technical scheme, drive assembly orders about reciprocating lever horizontal reciprocating motion, when reciprocating lever drove connecting block and location propelling movement pole and moves forward in step, thereby location propelling movement pole butt back of the body detains fastener one side of area and promotes back of the body detain the area and go forward, when location propelling movement pole backward moved and resets, location propelling movement pole touches the fastener of the area of detaining of the body, make location propelling movement pole relative movement seat rotate, thereby make location propelling movement pole slide on the upper portion surface of fastener and leave, make location propelling movement pole not take the area of detaining of the body when retreating, so intermittent type propelling movement back of the body detains the area. The connecting block position can be adjusted to the setting element wherein to adjust the position of location propelling movement pole on the back fastening area, thereby the fastener position of the different back fastening area of adaptation carries out the butt propelling movement, has improved the suitability to different back fastening area propelling movements.

The setting element includes holding ring and positioning bolt, the holding ring slides and wears to establish reciprocating lever is last and paste tightly in the both sides of connecting block, positioning bolt threaded connection be in on the holding ring, positioning bolt's tip is worn out the holding ring support tightly in on the body of rod of reciprocating lever.

Through adopting above-mentioned technical scheme, remove the regulation to the holding ring, rotating positioning bolt fixes the holding ring on the reciprocating lever, thereby connecting block both sides are supported tightly the centre gripping by the holding ring and are fixed on the reciprocating lever to this position of regulation location propelling movement pole on back of the body buckle band.

Preferably, the workbench is provided with a sensor for detecting the displacement of the back strap belt, a feeding frame is fixed on one side of the machine body, the feeding frame is provided with a first driving motor, a roller and a pressing roller, the first driving motor drives the roller to rotate, and a gap for the back strap belt to penetrate is reserved between the pressing roller and the roller.

Through adopting above-mentioned technical scheme, the sensor detects the back-off belt displacement and mistimes, orders about first driving motor and push mechanism and operates in coordination, makes the back-off belt move forward or backward to make the back-off belt adjust to the correct cutting position of settlement in, further improved the accuracy that the back-off belt cut.

Preferably, the adjusting part includes slide rail, regulation seat, adjusting bolt and reset spring, the slide rail is fixed on the organism, workstation sliding connection is in on the slide rail, reset spring's one end is fixed in the organism, other one end is fixed the workstation side, it fixes to adjust the seat on the organism, adjusting bolt screw thread through connection is in on the regulation seat, adjusting bolt's tip butt is in the workstation is kept away from reset spring's a side.

Through adopting above-mentioned technical scheme, the both sides that make the workstation are by reset spring and adjusting bolt butt respectively, twist adjusting bolt on adjusting the seat and move, can drive workstation horizontal migration on the slide rail to the back of the body area of detaining of placing on the workstation can move the adjusting position on its width direction, makes the back of the body area of detaining cut the position and adjust the alignment with cutting mechanism, has improved the suitability of cutting different back of the body area of detaining.

Preferably, the cutting mechanism includes: install blade holder on the organism, install traveller on the blade holder, sliding connection is in punching press seat on the traveller installs the cutting die of punching press seat bottom is fixed the roof at traveller top, and fix punching press cylinder on the roof, punching press cylinder's piston rod wear out the roof and with punching press seat fixed connection.

Through adopting above-mentioned technical scheme, punching press cylinder orders about the punching press board and goes up and down to make cutting die carry out the punching press to the back of the body buckle area and tailor.

Preferably, be fixed with two at least mount pads on the locating pressing block, be fixed with the installation pole on the mount pad, install same flattening piece on the installation pole, the joint groove has been seted up to flattening piece's bottom, flattening piece erects through the joint groove on the installation pole, flattening piece's bottom with the surface cloth contact of area is detained on the back, the spacing ring is worn to be equipped with in the slip on the installation pole, the spacing ring is located flattening piece's both sides, it has stop bolt to run through threaded connection on the spacing ring, stop bolt's tip is supported tightly the installation pole.

Through adopting above-mentioned technical scheme, make the back of the body knot area can be flattened by the flattening piece, make back of the body knot area middle part cut more smoothly, improve the cutting quality of back of the body knot area, and the flattening piece can pass through the vertical slip of joint groove on the installation pole, the thickness that the piece can adapt to the back of the body knot area that flattens is laminated the surface of detaining the area and is flattened, furthermore, the horizontal position of flattening piece on the installation pole can be adjusted to spacing ring and spacing bolt, thereby the piece that makes to flatten can adjust to suitable cloth surface position department on the back of the body knot area, the piece that makes to flatten can the different back of the body knot areas of adaptation flatten.

Preferably, a waist-shaped hole is formed in the positioning pressing block, the waist-shaped hole extends in the direction perpendicular to the conveying direction of the back fastening belt, a thread groove corresponding to the waist-shaped hole is formed in the workbench, a fixing bolt penetrates through the waist-shaped hole, and the tail of the fixing bolt is connected to the thread groove through a bolt.

Through adopting above-mentioned technical scheme, make two location briquetting can adjust mutual distance on the workstation to the width of the different back of the body area of adaptation carries out position limitation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the positioning pressing block, the pushing mechanism and the cutting mechanism, the back buckle belt can be pushed into the cutting mechanism by the pushing mechanism to be cut, so that the back buckle belt can be automatically cut, the cutting efficiency is improved, the moving direction of the back buckle belt can be limited by the positioning pressing block, and the cutting accuracy and stability of the back buckle belt are improved;

2. the sensor is arranged, so that displacement verification can be carried out on the back buckling belt before cutting, and the first driving motor and the second driving motor carry out position correction and adjustment on the back buckling belt, so that the cutting accuracy of the back buckling belt is improved;

3. through setting up adjusting part, make the workstation can carry out position control to detain the area and aim at the regulation with cutting the mechanism to the back, further improved the back and detained the precision of cutting of area, also improved the suitability of cutting of detaining the area to different backs.

Drawings

FIG. 1 is a schematic diagram of the overall structure in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a driving assembly in an embodiment of the present application;

FIG. 3 is an enlarged view A of FIG. 1;

fig. 4 is a partial cross-sectional view schematically illustrating an embodiment of the present application.

Description of reference numerals: 1. a body; 11. a blanking hopper; 2. a work table; 21. a slide rail; 22. an adjusting seat; 23. adjusting the bolt; 24. a return spring; 3. positioning a pressing block; 31. positioning a groove; 32. a kidney-shaped hole; 33. fixing the bolt; 4. flattening the block; 41. a mounting seat; 42. mounting a rod; 43. a clamping groove; 44. a limiting ring; 45. a limit bolt; 5. a first drive motor; 51. a roller; 52. a compression roller; 53. a feeding frame; 6. a second drive motor; 61. a guide frame; 62. a driving wheel; 63. a driven wheel; 64. a belt; 65. moving the plate; 7. positioning the push rod; 71. a movable seat; 72. a reciprocating lever; 73. connecting blocks; 74. a positioning ring; 75. positioning the bolt; 8. a tool apron; 81. a traveler; 82. punching a seat; 83. cutting a die; 84. a top plate; 85. punching a cylinder; 9. a sensor; 100. a back buckle belt.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses an automatic guillootine of underwear back dunk.

Referring to fig. 1, an automatic guillootine of underwear back dunk, including organism 1, be provided with workstation 2, push mechanism and cut the mechanism on the organism 1, push mechanism and cut the mechanism and all with PLC controller electric connection, back dunk area 100 is placed on workstation 2 and is worn to locate in location briquetting 3, and push mechanism cuts back dunk area 100 propelling movement to cutting mechanism.

As shown in fig. 1, a feeding frame 53 is fixed on one side of the machine body 1 away from the cutting mechanism, a roller 51 and a pressing roller 52 are rotatably connected in the feeding frame 53, a gap for the back-fastening belt 100 to penetrate through is left between the roller 51 and the pressing roller 52, a first driving motor 5 is fixed on the outer side of the feeding frame 53, an output shaft of the first driving motor 5 penetrates through the feeding frame 53 and is connected with the roller 51, and the first driving motor 5 is started to drive the roller 51 to rotate, so that the back-fastening belt 100 is rolled by the roller 51 and the pressing roller 52 and is sent to the workbench 2.

As shown in fig. 2 and fig. 3, in the present embodiment, the pushing mechanism includes a moving base 71, a reciprocating rod 72, a connecting block 73, a positioning pushing rod 7, and a driving component for driving the moving base 71 to reciprocate and move horizontally.

Specifically, referring to fig. 2, in this embodiment, the driving assembly includes a second driving motor 6 installed in the machine body 1, the second driving motor 6 may be a servo motor or a stepping motor, a driving wheel 62 is installed on an output shaft of the second driving motor 6, a guide frame 61 is further installed in the machine body 1, a driven wheel 63 is rotatably connected to the guide frame 61, a belt 64 is sleeved on the driving wheel 62 and the driven wheel 63, a moving plate 65 is fixed to the belt 64, the moving plate 65 horizontally slides on the guide frame 61, a moving seat 71 is fixed to the moving plate 65, a reciprocating rod 72 is rotatably connected to the moving seat 71, and the reciprocating rod 72 can intermittently reciprocate in the long side direction of the back buckle belt 100 under the driving of the belt by the second driving motor 6 rotating forward and backward.

As shown in fig. 3, one end of the reciprocating rod 72 far from the moving seat 71 horizontally extends out of the machine body 1 and is located above the back strap 100, the connecting block 73 is installed on the reciprocating rod 72, the positioning pushing rod 7 is fixed on the connecting block 73, and the bottom end of the positioning pushing rod 7 contacts one side of the fastener of the back strap 100.

Referring to fig. 2 and 3, when the reciprocating rod 72 drives the positioning pushing rod 7 to move towards the cutting mechanism through the driving component, the bottom end of the positioning pushing rod 7 abuts against one side of the fastener of the back strap 100, so as to push the back strap 100 to move forward; after the back-fastening belt 100 is pushed to a predetermined position for cutting, when the driving assembly drives the reciprocating rod 72 to move backward, the positioning pushing rod 7 moves backward to contact with the fastener of the back-fastening belt 100, so that the positioning pushing rod 7 rotates relative to the moving seat 71, and the positioning pushing rod 7 slides away from the upper surface of the fastener of the back-fastening belt 100, so that the back-fastening belt 100 does not move backward to move backward along with the positioning pushing rod 7. After the positioning pushing rod 7 moves to the initial position, the driving component continues to drive the reciprocating rod 72 to move forward, so as to push the back strap 100 to be intermittently pushed into the cutting mechanism for cutting.

In addition, as shown in fig. 3, the pushing mechanism further includes a positioning member, the connecting block 73 is sleeved on the reciprocating rod 72, and the positioning member can adjust the axial position of the connecting block 73 on the reciprocating rod 72. In this embodiment, the positioning element includes a positioning ring 74 and a positioning bolt 75, the positioning ring 74 is sleeved on the reciprocating rod 72, the positioning bolt 75 penetrates through the annular wall of the positioning ring 74, the end of the positioning bolt 75 abuts against the rod body of the reciprocating rod 72, the positioning ring 74 is installed on the reciprocating rod 72 on both sides of each connecting block 73, and the connecting block 73 is abutted against by the positioning rings 74 on both sides and fixed on the reciprocating rod 72.

The worker penetrates the corresponding number of the connecting blocks 73 on the reciprocating rod 72 according to the number of each row of the fasteners of the back strap 100, in this embodiment, referring to fig. 3, two connecting blocks 73 and corresponding positioning pushing rods 7 are provided, so that the back strap 100 can be pushed more stably. In addition, the worker can adjust the position of the connecting block 73 according to the position of the fastener on the back strap 100, so that the bottom end of the positioning pushing rod 7 can contact the fastener on the corresponding back strap 100, and the back strap 100 with different positions or different numbers of the fasteners can be pushed.

In order to enable the back buckle belt 100 to stably move on the workbench 2 without deviating the conveying path easily, as shown in fig. 1 and fig. 3, two positioning pressing blocks 3 are installed on the machine body 1 below the positioning pushing rod 7, the two positioning pressing blocks 3 are arranged at intervals, and the long side direction of the positioning pressing block 3 is parallel to the long side direction of the back buckle belt 100. The positioning groove 31 for the back buckle belt 100 to penetrate is arranged at the bottom of the opposite side edge of the two positioning pressing blocks 3, the positioning groove 31 extends along the long side direction of the positioning pressing block 3, and the positioning groove 31 penetrates through the two ends of the positioning pressing block 3.

As shown in fig. 3, a kidney-shaped hole 32 is formed through the positioning pressing block 3, the extending direction of the kidney-shaped hole 32 is perpendicular to the long side direction of the positioning pressing block 3, a thread groove is formed in the worktable 2, the thread groove corresponds to the kidney-shaped hole 32 in position, a fixing bolt 33 is formed through the kidney-shaped hole 32, the fixing bolt 33 penetrates through the kidney-shaped hole 32 and is in threaded connection with the thread groove, and thus the positioning pressing block 3 is fixed on the worktable 2.

The relative distance between the two positioning pressing blocks 3 is adjusted by moving the positioning pressing blocks 3 along the direction of the waist-shaped hole 32, so that the distance between the inner side walls of the positioning grooves 31 of the two positioning pressing blocks 3 is matched with the width of the back buckle belt 100. The back strap 100 penetrates through the openings of the positioning grooves 31 on one side of the two positioning pressing blocks 3, and the edges of the cloth on the two sides of the back strap 100 penetrate through the positioning grooves 31 of the two positioning pressing blocks 3 respectively, so that the positioning pressing blocks 3 limit the moving direction of the back strap 100, and the back strap 100 can stably move along the groove body direction of the positioning grooves 31 of the positioning pressing blocks 3 and is not easy to deviate.

As shown in fig. 1 and 3, two installation bases 41 are fixed on the positioning pressing block 3, installation rods 42 are horizontally fixed on the two installation bases 41, the same flattening block 4 is installed on the two installation rods 42, wherein clamping grooves 43 are formed in the bottoms of the two ends of the flattening block 4, and the installation rods 42 are clamped in the clamping grooves 43 of the flattening block 4, so that the flattening block 4 is erected on the installation rods 42, and the bottom end of the flattening block 4 is in contact with the cloth surface of the back buckle belt 100.

In addition, referring to fig. 3, two limiting rings 44 are slidably inserted into each mounting rod 42, the two limiting rings 44 are respectively located on two side edges of the flattening block 4, a limiting bolt 45 is threadedly connected to each limiting ring 44, and the tail of the limiting bolt 45 penetrates through the ring wall of the limiting ring 44 and abuts against the mounting rod 42. The worker moves and adjusts the flattening block 4 and the limiting ring 44 to enable the flattening block 4 to abut against a proper position on the surface of the back buckle belt 100, and then the limiting bolt 45 is screwed, so that the flattening block 4 is limited by the limiting rings 44 on two sides.

The flattening block 4 flattens the surface cloth of the back fastening belt 100, so that the back fastening belt 100 is not easy to bulge between the two positioning pressing blocks 3, the back fastening belt 100 can enter the cutting mechanism more smoothly to be cut, the clamping groove 43 of the flattening block 4 and the mounting rod 42 can slide relatively in the vertical direction, the flattening block 4 can adapt to the surface of the attached back fastening belt 100 and move properly, and the stability and the smoothness of the back fastening belt 100 during moving are improved.

In addition, as shown in fig. 4, an adjusting assembly is disposed on the machine body 1 for adjusting the movement of the worktable 2 on the machine body 1, and in this embodiment, the adjusting assembly includes a slide rail 21, an adjusting seat 22, an adjusting bolt 23, and a return spring 24.

Referring to fig. 4, the slide rail 21 is horizontally fixed on the machine body 1, the slide rail 21 extends along a direction perpendicular to the moving direction of the back-buckle belt 100, and the workbench 2 is slidably connected to the slide rail 21. Adjust seat 22 and fix on one side organism 1 of workstation 2, adjust and run through threaded hole on the seat 22, adjusting bolt 23 threaded connection is on the screw hole, adjusting bolt 23 penetrate the side of the tip conflict workstation 2 of adjusting seat 22, and reset spring 24's one end is fixed in one side that workstation 2 kept away from adjusting seat 22, and reset spring 24's the other end is fixed in organism 1.

The workman makes one side end of workstation 2 support by adjusting bolt 23 butt, the other end is supported by reset spring 24 and is pressed through revolving wrong adjusting bolt 23 for workstation 2 horizontal migration on slide rail 21 drives the back of the body area 100 horizontal migration of placing on workstation 2, thereby can make back of the body area 100 and the relative position who cuts the mechanism adjust, has improved the precision that the guillootine cuts suitability and the back of the body area 100 of different back of the body area 100.

In addition, in this embodiment, as shown in fig. 3, a sensor 9 is installed at a position of the workbench 2 close to the cutting mechanism, the sensor 9 is specifically a laser displacement sensor, the sensor 9 is electrically connected to the PLC controller, the sensor 9 can detect the displacement of the back strap 100, verify whether the back strap 100 moves to an accurate position, and correct the position of the back strap 100 by driving the first driving motor 5 and the second driving motor 6, so as to further improve the cutting accuracy of the back strap 100.

The back strap 100 is pushed from the working table 2 to the cutting mechanism for cutting, as shown in fig. 1, the cutting mechanism includes a knife holder 8, a sliding column 81, a top plate 84, a stamping holder 82, a cutting die 83, and a stamping cylinder 85. Wherein, the tool apron 8 is arranged on the machine body 1 and connected with the workbench 2, and the surface of the tool apron 8 is flush with the surface of the workbench 2. The number of the sliding columns 81 is two, the two sliding columns 81 are fixed on the top surface of the tool apron 8, the top plate 84 is fixed on the top end of the sliding column 81, the stamping seat 82 is connected to the sliding column 81 in a sliding mode, the stamping cylinder 85 is installed on the top plate 84, a piston rod of the stamping cylinder 85 penetrates through the top plate 84 and is fixedly connected with the top surface of the stamping seat 82, and the cutting die 83 is installed on the bottom surface of the stamping seat 82.

After the back buckle belt 100 is conveyed to a preset position on the cutter holder 8, the stamping cylinder 85 drives the stamping seat 82 to descend, so that the cutting die 83 cuts the back buckle belt 100, after the cutting is completed, the stamping cylinder 85 drives the stamping seat 82 to ascend, the pushing mechanism continues conveying the back buckle belt 100, and the stamping cylinder 85 drives the stamping seat 82 to descend again for cutting, so that the back buckle belt 100 is cut into individual back buckle products. Referring to fig. 1, a blanking bucket 11 is installed at one side of the knife holder 8, and the back-fastening tape 100 is cut and dropped into the blanking bucket 11 for collection.

The implementation principle of the embodiment of the application is as follows:

the back strap 100 is arranged between the two positioning pressing blocks 3 in a penetrating mode, the positioning pressing blocks 3 can limit the moving direction of the back strap 100, the back strap 100 is made to move along the preset direction, the relative position of the adjusting workbench 2 and the cutting assembly is adjusted through the movement of the adjusting assembly, the back strap 100 is made to be accurately cut, under the control of an electric signal of the PLC, the first driving motor 5 and the second driving motor 6 synchronously push the back strap 100 to the cutting mechanism, the first driving motor 5 and the second driving motor 6 push the back strap 100 forward once, the cutting mechanism cuts the back strap 100 once, the operation is coordinated, the automatic cutting of the back strap 100 is achieved, and the production efficiency and the cutting accuracy are improved.

The above are all preferred embodiments of the present application, and the present embodiment is only explained for the present application, and the protection scope of the present application is not limited by this, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an automatic guillootine is detained to underwear back of body, includes organism (1), its characterized in that, install on organism (1) and be used for the push mechanism of carrying back of body cingulum (100) location, install workstation (2) on organism (1), two location briquetting (3) are installed at the interval on workstation (2), two the confession has been seted up to the side bottom that location briquetting (3) are close to each other the constant head tank (31) that (100) edge cloth penetrated are detained to the back of body, be provided with on organism (1) and be used for adjusting workstation (2) are along the perpendicular to the adjusting part that (100) direction of delivery removed is detained to the back of body, it is right to install on organism (1) the back of body cingulum (100) carry out the mechanism that cuts.

2. The automatic cutting machine for underwear back buttons according to claim 1, wherein the pushing mechanism comprises a moving seat (71), a reciprocating rod (72) rotatably connected to the moving seat (71), a connecting block (73) slidably arranged on the reciprocating rod (72), a positioning member arranged on the reciprocating rod (72) and used for fixing the connecting block (73), a positioning pushing rod (7) fixed on the connecting block (73), and a driving assembly arranged on the machine body (1) and used for driving the moving seat (71) to horizontally and intermittently reciprocate, wherein the bottom end of the positioning pushing rod (7) is in contact with one side of the fastener of the back button belt (100).

3. The automatic cutting machine for underwear back buttons according to claim 2, wherein the positioning member comprises a positioning ring (74) and a positioning bolt (75), the positioning ring (74) is slidably disposed on the reciprocating rod (72) and tightly attached to two sides of the connecting block (73), the positioning bolt (75) is threadedly connected to the positioning ring (74), and an end of the positioning bolt (75) penetrates through the positioning ring (74) and tightly abuts against a rod body of the reciprocating rod (72).

4. The automatic cutting machine for the back button of underwear according to claim 1, characterized in that a sensor (9) for detecting the displacement of the back button belt (100) is installed on the workbench (2), a feeding frame (53) is fixed on one side of the machine body (1), a first driving motor (5), a roller (51) and a pressing roller (52) are installed on the feeding frame (53), the roller (51) is driven by the first driving motor (5) to rotate, and a gap for the back button belt (100) to penetrate through is reserved between the pressing roller (52) and the roller (51).

5. The automatic cutting machine for underwear back buttons according to claim 1, characterized in that the adjusting assembly comprises a slide rail (21), an adjusting seat (22), an adjusting bolt (23) and a return spring (24), the slide rail (21) is fixed on the machine body (1), the workbench (2) is slidably connected on the slide rail (21), one end of the return spring (24) is fixed in the machine body (1), the other end of the return spring is fixed at the side end of the workbench (2), the adjusting seat (22) is fixed on the machine body (1), the adjusting bolt (23) is in threaded through connection on the adjusting seat (22), and the end of the adjusting bolt (23) abuts against the side end of the workbench (2) far away from the return spring (24).

6. The automatic cutting machine for underwear back buttons of claim 1, wherein the cutting mechanism comprises: install blade holder (8) on organism (1), install traveller (81) on blade holder (8), sliding connection be in punching press seat (82) on traveller (81), install cutting die (83) of punching press seat (82) bottom, fix roof (84) at traveller (81) top, and fix punching press cylinder (85) on roof (84), the piston rod of punching press cylinder (85) is worn out roof (84) and with punching press seat (82) fixed connection.

7. The automatic cutting machine for underwear back buttons according to claim 1, characterized in that at least two mounting seats (41) are fixed on the positioning pressing block (3), a mounting rod (42) is fixed on the mounting seat (41), the same flattening block (4) is mounted on the mounting rod (42), the bottom of the flattening block (4) is provided with a clamping groove (43), the flattening block (4) is erected on the mounting rod (42) through the clamping groove (43), the bottom end of the flattening block (4) is contacted with the surface cloth of the back fastening belt (100), a limiting ring (44) is arranged on the mounting rod (42) in a sliding and penetrating way, the limiting ring (44) is positioned on two sides of the flattening block (4), the limiting ring (44) is connected with a limiting bolt (45) in a penetrating and threaded mode, and the end portion of the limiting bolt (45) abuts against the mounting rod (42).

8. The automatic cutting machine for the back button of underwear according to claim 1, characterized in that the positioning pressing block (3) is provided with a waist-shaped hole (32), the waist-shaped hole (32) extends along a direction perpendicular to the conveying direction of the back button belt (100), the workbench (2) is provided with a thread groove corresponding to the waist-shaped hole (32), the waist-shaped hole (32) is provided with a fixing bolt (33), and the fixing bolt (33) is connected with the thread groove by a bolt.

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