CN210127310U

CN210127310U - Curling device for windlass foot machine

Info

Publication number: CN210127310U
Application number: CN201920633164.6U
Authority: CN
Inventors: 陈中华
Original assignee: Changzhou Zhigu Electromechanical Technology Co Ltd
Current assignee: Changzhou Zhigu Electromechanical Technology Co Ltd
Priority date: 2019-05-05
Filing date: 2019-05-05
Publication date: 2020-03-06
Anticipated expiration: 2029-05-05

Abstract

The utility model discloses a crimping device for rumble foot machine, its main points are: comprises a material rolling mechanism, a detection mechanism and a positioning mechanism. The mounting seat of the material rolling mechanism is fixedly arranged on the middle part of the right side of the sewing machine head of the foot rolling machine. The coil stock second drives actuating cylinder and is fixed the setting on the right side rear portion of coil stock mechanism mount pad by its cylinder body along front-back, and its piston rod stretches out forward, and the end and the coil stock second mount pad fixed connection of piston rod. The first coil stock driving cylinder is fixedly arranged on the second coil stock mounting seat from the cylinder body up and down, and the piston rod of the first coil stock driving cylinder extends upwards. The coil material hook is fixedly connected with a piston rod of the first coil material driving cylinder, so that the first coil material driving cylinder drives the coil material hook to move up and down, and the second coil material driving cylinder drives the coil material hook to move back and forth. The detection mechanism comprises a detection roller, and the thickness change of the cloth is detected through the detection roller. The positioning mechanism is used for limiting the tail end of the cloth.

Description

Curling device for windlass foot machine

Technical Field

The utility model relates to a sewing processing equipment field specifically is a hemming device that is arranged in rumble foot machine to carry out the turn-up to the leg of a trouser leg pipe of trousers in the dress and the tube-shape part of other dresses.

Background

The foot-rolling machine is a sewing machine for sewing trouser leg tubes of trousers and other cylindrical parts of clothes, and is widely applied to clothes production. The ends of the leg openings (i.e., the lower ends of the leg openings) of the pants need to be hemmed for the sake of good appearance during the process. The hemming device is an important component of the foot rolling machine, the conventional method is that the inside of trousers is turned to the outside firstly by manpower, then the tail end of the trouser leg tube is turned upwards and turned over for the second time by the hemming device after being turned over for one time by manpower, so that the burr is turned to the inside and covered, then the trousers are sewn, the trousers are turned back to the front side after being sewn, the lower end of the trouser leg tube looks flat and beautiful, and the burr is sewn into the inside and is not easy to be broken off and scattered.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a simple structure's higher crimping device that is arranged in rumble foot machine of degree of automation.

Realize the utility model discloses the basic technical scheme of purpose is: the utility model provides a crimping device for rumble foot machine which structural feature is: comprises a material rolling mechanism, a detection mechanism and a positioning mechanism. The coil stock mechanism comprises a coil stock mechanism mounting seat, a coil stock hook, a coil stock first driving cylinder, a coil stock second mounting seat and a coil stock second driving cylinder. The mounting seat of the material rolling mechanism is fixedly arranged on the middle part of the right side of the sewing machine head of the foot rolling machine. The coil stock second drives actuating cylinder and is fixed the setting on the right side rear portion of coil stock mechanism mount pad by its cylinder body along front-back, and its piston rod stretches out forward, and the end and the coil stock second mount pad fixed connection of piston rod. The first coil stock driving cylinder is fixedly arranged on the second coil stock mounting seat from the cylinder body up and down, and the piston rod of the first coil stock driving cylinder extends upwards. The coil material hook is fixedly connected with a piston rod of the first coil material driving cylinder, so that the first coil material driving cylinder drives the coil material hook to move up and down, and the second coil material driving cylinder drives the coil material hook to move back and forth. The detection mechanism comprises a detection roller, and the thickness change of the cloth is detected through the detection roller. The positioning mechanism is used for limiting the tail end of the cloth. The technical scheme based on the basic technical scheme is as follows: the coil stock mechanism also comprises a coil stock first mounting seat, a coil stock first guide assembly and a coil stock second guide assembly. The coil stock second guide assembly adopts a linear guide rail, the linear guide rail is horizontally and fixedly arranged on the right side of the coil stock mechanism mounting seat along the front-back direction, and the coil stock second mounting seat is fixedly arranged on a sliding block of the linear guide rail. The first guide assembly of coil stock adopts linear guide, and linear guide's slider fixed connection is on the right side of coil stock second mount pad, and linear guide's guide rail is along going up to fixed connection on the first mount pad of coil stock. The end of the piston rod of the first driving cylinder for the coil stock is fixedly connected with the first coil stock mounting seat, and the coil stock hook is fixedly arranged on the first coil stock mounting seat.

The technical scheme based on the corresponding technical schemes is as follows: the coiling hook is an integrated piece and comprises a connecting rod part and a hook part. The coiling hook is horizontally and fixedly arranged on the first coiling mounting seat along the front-back direction by the connecting rod part, the bent hook part is in a C shape with a backward opening, and the opening of the bent hook part is positioned at the left of the connecting rod part. The bent hook part is obliquely arranged with a lower left part and a higher right part, so that the bent hook part can conveniently extend backwards between the folding part of the trouser leg pipe and the original trouser leg pipe.

The technical scheme based on the corresponding technical schemes is as follows: the positioning mechanism comprises a positioning plate. The positioning plate is vertically arranged on the sewing machine head in the left-right direction through the corresponding connecting seat, is positioned at the rear side of the needle and is used for positioning the cloth in the front-back direction. The position of the positioning plate in the front-rear direction can be adjusted. The right part of the positioning plate is provided with a material hooking rod groove which penetrates through the positioning plate and has a downward opening. The connecting rod part of the coiling hook extends forwards from the coiling rod groove of the positioning plate, and the hook part of the coiling hook is positioned on the front side of the positioning plate.

The technical scheme based on the corresponding technical schemes is as follows: the detection mechanism further comprises a roller mounting arm, a detection rotating shaft, a rotating shaft mounting seat, a rotating shaft driving arm, a rotating shaft driving cylinder, a driving cylinder mounting seat, a rotating shaft reset spring and a bone position detection photoeye.

The detection roller adopts a deep groove ball bearing, the deep groove ball bearing is fixedly arranged at the left end of the roller mounting arm by an inner ring of the deep groove ball bearing, and the outer ring rotating axis of the deep groove ball bearing is horizontally arranged along the front-back direction. The rotating shaft mounting seat is fixedly arranged on the material rolling mechanism mounting seat, and the detection rotating shaft is arranged in the rotating shaft mounting seat in a forward and backward rotating mode. The right end of the roller mounting arm is fixedly arranged at the front end of the detection rotating shaft. The left end of the rotating shaft driving arm is fixedly arranged on the rear end of the detection rotating shaft. The driving cylinder mounting seat is fixedly arranged on the rear part of the rotating shaft mounting seat and protrudes rightwards. The rotating shaft driving cylinder is fixedly arranged on the driving cylinder mounting seat from top to bottom along the cylinder body, the piston rod of the rotating shaft driving cylinder extends downwards, and the end of the piston rod is connected with the right part of the rotating shaft driving arm. The rotating shaft reset spring is arranged between the right part of the rotating shaft driving arm and the right part of the driving cylinder mounting seat and is in a stretching state. The bone position detection photoeye is fixedly arranged on the lower portion of the right side of the driving cylinder mounting seat in the front-back direction and faces the front, and the bone position detection photoeye is used for detecting whether the right end of the rotating shaft driving arm is at the height of the corresponding position in front of the bone position detection photoeye.

The utility model discloses following beneficial effect has: (1) the utility model discloses a turn-up device for rumble foot machine simple structure only needs to turn over a trouser legs pipe box that has rolled over once during the use and overlaps on sewing machine head and corresponding vaulting pole, carries out a second time by coiling material mechanism and turns over a hem, and degree of automation is higher, has improved production machining efficiency greatly. The utility model discloses a turn-up device for rumble foot machine also can be used for the turn-up of the tube-shape part of other dresses.

(2) The utility model discloses a crimping device for rumble foot machine is equipped with detection mechanism, through the thickness change that detects the gyro wheel and detect the cloth, can detect out the position (the custom is called the bone position in the trade) of bulging on the trouser legs pipe to set for corresponding initial position and the end position of making up, the crotch of the control crimping device of being convenient for withdraws from, thereby can accomplish making up of whole circle.

(3) The utility model discloses a turn-up device for rumble foot machine is equipped with positioning mechanism, and positioning mechanism's locating plate is used for the leg of a trouser leg pipe cloth positioning in the front and back side, and the stitch seam of ensureing to make up is neat. The position of the positioning plate in the front and back direction can be adjusted, the sewing machine can be suitable for requirements of different sewing stitch widths, and the application range is wide.

Drawings

Fig. 1 is a schematic structural view of the curling device of the utility model when the curling device is installed on the sewing machine head of the foot rolling machine.

Fig. 2 is a left side view of fig. 1.

Fig. 3 is a right-side view of fig. 1.

Fig. 4 is a schematic top view of fig. 1.

Fig. 5 is a schematic view as viewed from the upper right front of fig. 1.

Fig. 6 is a schematic view as viewed from the front right lower side of fig. 1.

Fig. 7 is a schematic view as viewed from the upper right rear side of fig. 1.

Fig. 8 is an enlarged schematic view of the winding mechanism and the detection mechanism in fig. 1.

Fig. 9 is an enlarged schematic view of the winding mechanism and the detection mechanism as viewed from the front right below in fig. 1.

Fig. 10 is an enlarged schematic view of the winding mechanism and the detection mechanism as viewed from the front left upper side of fig. 1.

Fig. 11 is an enlarged schematic view of the winding mechanism and the detection mechanism as viewed from the upper left rear side of fig. 1.

Fig. 12 is an enlarged schematic view of the positioning mechanism as viewed from the upper right front of fig. 1.

The reference numbers in the drawings are:

the head of the sewing machine 100, the needle 100-1,

a coiling mechanism 1, a coiling mechanism mounting seat 1-1, a coiling hook 1-2, a connecting rod part 1-21, a hook part 1-22, a coiling first mounting seat 1-3, a coiling first guide component 1-4, a coiling first driving air cylinder 1-5, a coiling second mounting seat 1-6, a coiling second guide component 1-7, a coiling second driving air cylinder 1-8, a limit screw 1-9,

a detection mechanism 2, a detection roller 2-1, a roller mounting arm 2-2, a detection rotating shaft 2-3, a rotating shaft mounting seat 2-4, a rotating shaft driving arm 2-5, a rotating shaft driving cylinder 2-6, a driving cylinder mounting seat 2-7, a rotating shaft return spring 2-8, a bone position detection photoeye 2-9,

the device comprises a positioning mechanism 3, a positioning plate 3-1 and a material rolling rod groove 3-11.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings. The description of the orientation of the utility model is performed according to the orientation shown in fig. 1, that is, the up-down left-right direction shown in fig. 1 is the up-down left-right direction of the description, the side towards which fig. 1 faces is the front side, and the side departing from fig. 1 is the rear side.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.

It should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on the positional relationships illustrated in the drawings, and are used only for convenience in describing the present invention or simplifying the description, but do not indicate that a particular orientation must be provided.

(example 1)

See fig. 1 to 12, the utility model discloses a crimping device for rumble foot machine includes coiling material mechanism 1, detection mechanism 2 and positioning mechanism 3. The positioning mechanism 3 comprises a positioning plate 3-1. The positioning plate 3-1 is vertically arranged on the sewing machine head 100 along the left-right direction through a corresponding connecting seat, is positioned at the rear side of the needle 100-1 and is used for positioning the cloth in the front-rear direction. The position of the positioning plate 3-1 in the front-rear direction can be adjusted, and the distance between the front side surface of the positioning plate 3-1 and the needle 100-1 is 7 to 46 mm. The right part of the positioning plate 3-1 is provided with a material hooking rod groove 3-11 which penetrates through the front part and the rear part of the positioning plate and has a downward opening.

Referring to fig. 1 to 11, the coiling mechanism 1 comprises a coiling mechanism mounting seat 1-1, a coiling hook 1-2, a coiling first mounting seat 1-3, a coiling first guide component 1-4, a coiling first driving cylinder 1-5, a coiling second mounting seat 1-6, a coiling second guide component 1-7, a coiling second driving cylinder 1-8 and a limit screw 1-9.

The material rolling mechanism mounting seat 1-1 is fixedly arranged on the middle part of the right side of the sewing machine head 100. The coil material second guide assembly 1-7 adopts a linear guide rail, the linear guide rail is horizontally and fixedly arranged on the right side of the coil material mechanism mounting seat 1-1 along the front-back direction, and the coil material second mounting seat 1-6 is fixedly arranged on a sliding block of the linear guide rail. The second coil material driving cylinder 1-8 is fixedly arranged on the rear part of the right side of the second coil material mechanism mounting seat 1-1 from the cylinder body in the front-back direction, a piston rod of the second coil material driving cylinder extends forwards, the end head of the piston rod is fixedly connected with the second coil material mounting seat 1-6, and the second coil material driving cylinder 1-8 drives the second coil material mounting seat 1-6 to move back and forth along the second coil material guiding component 1-7. The first coil stock guide assembly 1-4 is a linear guide rail, a slide block of the linear guide rail is fixedly connected to the right side of the second coil stock mounting seat 1-6, and the guide rail of the linear guide rail is fixedly connected to the first coil stock mounting seat 1-3 along the vertical direction. The first coil material driving cylinder 1-5 is fixedly arranged on the second coil material mounting seat 1-6 from the cylinder body of the first coil material driving cylinder in the vertical direction, the piston rod of the first coil material driving cylinder extends upwards, and the end of the piston rod is fixedly connected with the first coil material mounting seat 1-3, so that the first coil material driving cylinder 1-5 drives the first coil material mounting seat 1-3 to move vertically along the first coil material guiding component 1-4. The coiling hook 1-2 is a one-piece part, and the coiling hook 1-2 comprises a connecting rod part 1-21 and a hook part 1-22. The coiling hook 1-2 is horizontally and fixedly arranged on the first coiling mounting seat 1-3 along the front-back direction by the connecting rod part 1-21 and extends out of the coiling rod groove 3-11 of the positioning plate 3-1 forwards; the hook part 1-22 is positioned at the front side of the positioning plate 3-1, the hook part 1-22 is C-shaped with a backward opening, and the opening of the hook part 1-22 is positioned at the left side of the connecting rod part 1-21. The bent hook parts 1-22 are obliquely arranged with the left lower part and the right higher part, so that the bent hook parts 1-22 can extend backwards between the folded parts of the trouser leg openings and the original trouser leg openings. The limiting screws 1-9 are screwed on the second coil stock mounting seats 1-6 and are positioned above the guide rails of the first coil stock guide assemblies 1-4.

Referring to fig. 1 to 11, the detection mechanism 2 comprises a detection roller 2-1, a roller mounting arm 2-2, a detection rotating shaft 2-3, a rotating shaft mounting seat 2-4, a rotating shaft driving arm 2-5, a rotating shaft driving cylinder 2-6, a driving cylinder mounting seat 2-7, a rotating shaft return spring 2-8 and a bone position detection photoeye 2-9.

The detection roller 2-1 adopts a deep groove ball bearing, the deep groove ball bearing is fixedly arranged at the left end of the roller mounting arm 2-2 by an inner ring of the deep groove ball bearing, and the rotating axis of an outer ring of the deep groove ball bearing is horizontally arranged along the front-back direction. The rotating shaft mounting seat 2-4 is fixedly arranged on the material rolling mechanism mounting seat 1-1, and the detection rotating shaft 2-3 is rotatably arranged in the rotating shaft mounting seat 2-4 along the front-back direction. The right end of the roller mounting arm 2-2 is fixedly arranged on the front end of the detection rotating shaft 2-3. The left end of the rotating shaft driving arm 2-5 is fixedly arranged on the rear end of the detection rotating shaft 2-3. The driving cylinder mounting seat 2-7 is fixedly arranged on the rear part of the rotating shaft mounting seat 2-4 and protrudes rightwards. The rotating shaft driving cylinder 2-6 is fixedly arranged on the driving cylinder mounting seat 2-7 from the cylinder body along the vertical direction, the piston rod of the rotating shaft driving cylinder extends downwards, and the end of the piston rod is fixedly connected with the right part of the rotating shaft driving arm 2-5. The rotating shaft return spring 2-8 is arranged between the right part of the rotating shaft driving arm 2-5 and the right part of the driving cylinder mounting seat 2-7 and is in a stretching state. The bone position detection photoeye 2-9 is fixedly arranged on the lower portion of the right side of the driving cylinder mounting seat 2-7 in the front-back direction and faces the front, and is used for detecting whether the right end of the rotating shaft driving arm 2-5 is at the height of the corresponding position in front of the bone position detection photoeye 2-9.

The utility model discloses a turn-up device for rumble foot machine during the use:

firstly, in an initial reset state: a piston rod of a second coiling driving cylinder 1-8 of the coiling mechanism 1 is in a forward extending state, so that a coiling hook 1-2 is forward; a piston rod of the first coil material driving cylinder 1-5 is in an upward extending state, so that the coil material hook 1-2 is upward; a rotating shaft of the detection mechanism 2 drives a piston rod of the air cylinder 2-6 to be in a downward extending state, so that the detection roller 2-1 is lifted upwards; the trouser leg openings of the trousers are integrally turned over (the original inner side is turned over to the outer side, and the original outer side is turned over to the inner side), then the burr parts at the tail ends of the trouser leg openings are turned over for 180 degrees outwards (namely, the burr parts are turned over to the side where the original trouser leg openings are located, so that the original inner sides of the turned-over parts are opposite to the original inner side of the trouser leg openings), and the folded lines are the tail ends of the sewed trousers. The end portions of the leg portions folded over are fitted over the front portion of the lower portion of the sewing machine head 100.

Secondly, the piston rod of the first coil material driving cylinder 1-5 retracts downwards, so that the left part of the hook part 1-22 of the coil material hook 1-2 is pressed downwards on the trouser leg legs; then the piston rod of the second material rolling driving cylinder 1-8 of the material rolling mechanism 1 retracts backwards, so that the hook part 1-22 of the material rolling hook 1-2 extends backwards between the folded part of the trouser leg and the original trouser leg, and then the piston rod of the first material rolling driving cylinder 1-5 extends upwards, so that the material rolling hook 1-2 is lifted upwards; the distance between the foremost end of the hook part 1-22 and the front side of the positioning plate 3-1 is smaller than the width of the turnover part of the trouser leg tube, when the turnover part rotates along the anticlockwise direction and passes through the hook part 1-22, the front rough edge of the turnover part is hooked backwards between the original trouser leg tube and the turnover part of the previous time under the action of the hook part 1-22, so that the rough edge part is turned over for the second time 180 degrees from the lower direction.

Thirdly, a rotating shaft of the detection mechanism 2 drives a piston rod of the air cylinder 2-6 to retract upwards, so that the detection roller 2-1 presses the trouser leg pipe cloth downwards on a corresponding material supporting mechanism of the bottom rumbling machine; the trouser leg openings are usually sewn into a cylindrical shape by two pieces of cloth, so that two joints are arranged in the circumferential direction of the trouser leg openings, the thickness of the two joints is usually the thickness of three layers of cloth, the thickness of the trouser leg openings is thicker (namely, the trouser leg openings can bulge) compared with the thickness of single-layer cloth, and the two joints are conventionally called as bone positions in the industry. When the bone position is located between the detection roller 2-1 and the material supporting mechanism, the detection roller 2-1 is jacked upwards, so that the right end of the rotating shaft driving arm 2-5 moves downwards, the corresponding part of the right end of the rotating shaft driving arm 2-5 in front of the bone position detection photoeye 2-9 cannot be detected, and the bone position is judged to be located between the detection roller 2-1 and the material supporting mechanism;

when the bone position detection light eye 2-9 detects that a bone position is positioned between the detection roller 2-1 and the material supporting mechanism for the first time, setting a delay time T, and calculating the delay time T according to the rotating speed of the trouser leg pipe and the circumferential distance of the trouser leg pipe between the bone position and the needle 100-1 of the sewing machine head 100. After the delay time T is over, the sewing machine head 100 starts sewing, and the three hemmed layers of cloth are sewn and fixed together.

When the bone position detecting optical eye 2-9 detects that a bone position is positioned between the detecting roller 2-1 and the material supporting mechanism for the second time, the sewing machine head 100 continues to sew. When the bone position detecting photoeye 2-9 detects that a bone position is positioned between the detecting roller 2-1 and the material supporting mechanism for the third time, the piston rod of the coil material second driving cylinder 1-8 of the coil material mechanism 1 extends forwards, so that the hook part 1-22 of the coil material hook 1-2 is withdrawn forwards from the space between the folding part of the trouser leg opening and the original trouser leg opening. After the sewing machine head 100 continues to sew for the time delay T, the sewing is stopped and the sewing is completed.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a crimping device for rumble foot machine which characterized in that: comprises a material rolling mechanism, a detection mechanism and a positioning mechanism; the coiling mechanism comprises a coiling mechanism mounting seat, a coiling hook, a coiling first driving cylinder, a coiling second mounting seat and a coiling second driving cylinder; the material rolling mechanism mounting seat is fixedly arranged on the middle part of the right side of the sewing machine head of the windlass foot machine; the second coil material driving cylinder is fixedly arranged on the rear part of the right side of the coil material mechanism mounting seat from the cylinder body in the front-back direction, a piston rod of the second coil material driving cylinder extends forwards, and the end of the piston rod is fixedly connected with the second coil material mounting seat; the first coil material driving cylinder is fixedly arranged on the second coil material mounting seat from the cylinder body of the first coil material driving cylinder along the vertical direction, and a piston rod of the first coil material driving cylinder extends upwards; the coil hook is fixedly connected with a piston rod of the coil first driving cylinder, so that the coil first driving cylinder drives the coil hook to move up and down, and the coil second driving cylinder drives the coil hook to move back and forth; the detection mechanism comprises a detection roller, and the thickness change of the cloth is detected through the detection roller; the positioning mechanism is used for limiting the tail end of the cloth.

2. The hemming device for rumble foot machine of claim 1 wherein: the material rolling mechanism further comprises a first material rolling mounting seat, a first material rolling guide assembly and a second material rolling guide assembly; the coil second guide assembly adopts a linear guide rail, the linear guide rail is horizontally and fixedly arranged on the right side of the coil mechanism mounting seat from the guide rail in the front-back direction, and the coil second mounting seat is fixedly arranged on a sliding block of the linear guide rail; the first coil stock guide assembly is a linear guide rail, a sliding block of the linear guide rail is fixedly connected to the right side of the second coil stock mounting seat, and the guide rail of the linear guide rail is fixedly connected to the first coil stock mounting seat along the vertical direction; the end of the piston rod of the first driving cylinder for the coil stock is fixedly connected with the first coil stock mounting seat, and the coil stock hook is fixedly arranged on the first coil stock mounting seat.

3. The hemming device for rumble foot machine of claim 1 wherein: the coiling hook is an integrated piece and comprises a connecting rod part and a hook part; the coiling hook is horizontally and fixedly arranged on the coiling first mounting seat along the front-back direction by the connecting rod part, the bent hook part is in a C shape with a backward opening, and the opening of the bent hook part is positioned at the left of the connecting rod part; the bent hook part is obliquely arranged with a lower left part and a higher right part, so that the bent hook part can conveniently extend backwards between the folding part of the trouser leg pipe and the original trouser leg pipe.

4. The hemming device for rumble foot machine of claim 3 wherein: the positioning mechanism comprises a positioning plate; the positioning plate is vertically arranged on the sewing machine head along the left-right direction through a corresponding connecting seat, is positioned at the rear side of the needle and is used for positioning the cloth in the front-back direction; the position of the positioning plate in the front and back direction can be adjusted; the right part of the positioning plate is provided with a material hooking rod groove which penetrates through the positioning plate and has a downward opening; the connecting rod part of the coiling hook extends forwards from the coiling rod groove of the positioning plate, and the hook part of the coiling hook is positioned on the front side of the positioning plate.

5. The hemming device for rumble foot machine of claim 3 wherein: the detection mechanism also comprises a roller mounting arm, a detection rotating shaft, a rotating shaft mounting seat, a rotating shaft driving arm, a rotating shaft driving cylinder, a driving cylinder mounting seat, a rotating shaft return spring and a bone position detection photoeye;

the detection roller adopts a deep groove ball bearing, the deep groove ball bearing is fixedly arranged at the left end of the roller mounting arm by an inner ring of the deep groove ball bearing, and the rotating axis of an outer ring of the deep groove ball bearing is horizontally arranged along the front-back direction; the rotating shaft mounting seat is fixedly arranged on the material rolling mechanism mounting seat, and the detection rotating shaft is arranged in the rotating shaft mounting seat in a forward and backward rotating manner; the right end of the roller mounting arm is fixedly arranged on the front end of the detection rotating shaft; the left end of the rotating shaft driving arm is fixedly arranged on the rear end of the detection rotating shaft; the driving cylinder mounting seat is fixedly arranged on the rear part of the rotating shaft mounting seat and protrudes rightwards; the rotating shaft driving cylinder is fixedly arranged on the driving cylinder mounting seat from the cylinder body along the vertical direction, the piston rod of the rotating shaft driving cylinder extends downwards, and the end of the piston rod is connected with the right part of the rotating shaft driving arm; the rotating shaft reset spring is arranged between the right part of the rotating shaft driving arm and the right part of the driving cylinder mounting seat and is in a stretching state; the bone position detection photoeye is fixedly arranged on the lower portion of the right side of the driving cylinder mounting seat in the front-back direction and faces the front, and the bone position detection photoeye is used for detecting whether the right end of the rotating shaft driving arm is at the height of the corresponding position in front of the bone position detection photoeye.