CN210451293U

CN210451293U - Automatic tin soldering device for inductor production

Info

Publication number: CN210451293U
Application number: CN201921290811.4U
Authority: CN
Inventors: 何佳; 刘林双; 俞用彬
Original assignee: Dongguan Donghong Automation Technology Co ltd
Current assignee: Dongguan Donghong Automation Technology Co ltd
Priority date: 2019-08-10
Filing date: 2019-08-10
Publication date: 2020-05-05
Anticipated expiration: 2029-08-10

Abstract

The utility model discloses an automatic soldering tin device for inductance production, include: a frame; a solder pot assembly comprising a solder pot supported on a frame; the soldering flux component comprises a soldering flux groove for containing soldering flux; the material moving mechanism is used for driving the inductor to move among different stations; the tin cutting mechanism comprises a steel wire, the steel wire can move back and forth along a direction perpendicular to the length direction of the steel wire, and the steel wire is located right above the tin furnace and lower than the height of the inductor at the highest position on the material moving mechanism. The device can realize the automatic soldering of the inductor.

Description

Automatic tin soldering device for inductor production

Technical Field

The utility model relates to a production field of inductance especially relates to an automatic soldering tin device for inductance production.

Background

During the production process of the inductor, the conductive contact of the inductor needs to be soldered. The inductor is not suitable for manual soldering tin due to small size, and the production of the inductor is often in large batch, so that the requirement of inductor production cannot be met in quality and efficiency by adopting manual soldering tin.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides an automatic soldering tin device for inductance production to realize the automation of soldering tin, improve production efficiency and production quality.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an automatic soldering tin device for inductance production, characterized by includes:

a frame;

a solder pot assembly comprising a solder pot supported on a frame;

the soldering flux component comprises a soldering flux groove for containing soldering flux;

the material moving mechanism is used for driving the inductor to move among different stations;

the tin cutting mechanism comprises a steel wire, the steel wire can move back and forth along a direction perpendicular to the length direction of the steel wire, and the steel wire is located right above the tin furnace and lower than the height of the inductor at the highest position on the material moving mechanism.

Preferably, the feeding mechanism comprises a feeding block movably supported on the frame through a second feeding support, the length direction of the feeding block is parallel to the moving direction of the feeding block, a plurality of feeding grooves are arranged on the upper surface of the feeding block in the length direction, the plurality of feeding grooves are uniformly arranged along the length direction of the feeding block, the taking mechanism comprises a taking support supported on the second feeding support, a rotating support rotatably supported on the taking support, and a number of taking nozzles supported on the rotating support and equal to the number of the feeding grooves, the plurality of taking nozzles are arranged along the length direction parallel to the feeding block, the absorbing direction of the taking nozzles is perpendicular to the rotating axis of the rotating support, the feeding block can move into or out of the position under the taking nozzles, the material moving mechanism obtains the inductor from a material taking suction nozzle.

Preferably, the feeding mechanism further comprises a vibration disc and a direct vibration mechanism, the direct vibration mechanism comprises a direct vibration device and a direct vibration rail mounted on an output end of the direct vibration device, a feed chute extending along the length direction of the direct vibration rail is arranged on the direct vibration rail, the length direction of the direct vibration rail is perpendicular to the length direction of the feeding block, the feeding chute is arranged on one side, close to the direct vibration rail, of the feeding block, an opening is formed in one side, facing the direct vibration rail, of the feeding chute, and the inductor can enter the feeding chute from the feed chute.

Preferably, the material moving bracket comprises a plurality of clamps which can move back and forth in a vertical plane perpendicular to the rotation axis of the rotating bracket, the number of the clamps is equal to the number of the material taking nozzles, and the clamps and the material taking nozzles are aligned one by one in a direction perpendicular to the rotation axis of the rotating bracket when viewed from top.

Preferably, still include tin scraping mechanism, tin scraping mechanism well includes with the steel wire moving direction is the same tin scraping plate, tin scraping plate's lower extreme can insert below the tin face, tin scraping plate's the size of following perpendicular to its moving direction slightly less than tin stove's inner chamber in moving direction's size.

Preferably, still include the mechanism of flattening, the mechanism of flattening includes a plurality of movable columns of movably supporting in the frame through the mounting panel that flattens, the mounting panel that flattens can remove along the horizontal direction of perpendicular to runing rest's axis of rotation for the frame, and is a plurality of the quantity of activity post is the same with the quantity of getting the material suction nozzle to when looking down the observation, a plurality of movable columns with get the material suction nozzle and be perpendicular to runing rest's axis of rotation direction one-to-one aligns, the activity post can move to under anchor clamps.

Preferably, still include unloading mechanism, unloading mechanism is including supporting the unloading mounting panel in the frame and be used for rotatably supporting the absorption module on the unloading mounting panel, the absorption module can be with moving the inductance absorption on the material mechanism.

Preferably, the adsorption module supports on the unloading mounting panel through adsorbing the mounting bracket, the adsorption module includes rotatably supports one side open-ended adsorption tank on adsorbing the mounting bracket, installs a plurality of magnets in the adsorption tank and sets up the apron at the opening part of adsorption tank through the magnet mounting panel, and the quantity of magnet is the same with the quantity of anchor clamps to the one-to-one, the magnet mounting panel can be along keeping away from or being close to the direction round trip movement of apron in the adsorption tank.

Preferably, the adsorption mounting frame is movably mounted to the unloading mounting plate in a direction parallel to the axis of the rotary support, and the unloading mechanism further includes a conveyor belt supported on the frame and located on one side of the transfer frame with respect to an axial direction parallel to the rotary support, and one end of the conveyor belt is located directly below the adsorption module as viewed in the axial direction parallel to the rotary support.

Preferably, the cleaning mechanism comprises a cloth strip at least partially arranged in a direction parallel to the rotation axis of the rotating bracket, the clamp can move to be right above the part of the cloth strip parallel to the rotation axis of the rotating bracket, and the cloth strip can move along the length direction of the clamp.

Compared with the prior art, the utility model discloses following beneficial effect has:

1) the device can realize automatic tin soldering in the process of processing the inductor, so that on one hand, the manpower is saved, the production cost is reduced, and on the other hand, the efficiency and the precision of tin soldering are improved;

2) the device combines the actual conditions of soldering tin, has the scaling powder subassembly, scrapes tin, cuts the tin subassembly and flattens the subassembly, has all required flows of soldering tin in-process, has guaranteed the soldering tin quality.

Drawings

Fig. 1-4 are perspective views of a preferred embodiment according to the present invention;

fig. 5-10 are block diagrams of a loading mechanism according to a preferred embodiment of the present invention;

figures 11-13 are block diagrams of a take off mechanism according to a preferred embodiment of the present invention;

figures 14-18 are block diagrams of a transfer mechanism according to a preferred embodiment of the present invention;

FIGS. 19-21 are block diagrams of a flux assembly in accordance with a preferred embodiment of the present invention;

figures 22-25 are block diagrams of a flattening mechanism according to a preferred embodiment of the invention;

FIGS. 26-28 are block diagrams of a tin furnace assembly according to a preferred embodiment of the present invention;

fig. 29-32 are block diagrams of a tin scraping and cutting mechanism according to a preferred embodiment of the present invention;

figures 33-35 are block diagrams of a cleaning mechanism according to a preferred embodiment of the present invention;

fig. 36-39 are structural views of a blanking mechanism according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

As shown in fig. 1 to 39, an automatic soldering device for inductance production includes a frame 1 and a feeding mechanism 100 supported on the frame 1.

The feed mechanism 100 comprises a vibratory pan 102 supported on the machine frame 1 by a first feed support 101, a direct vibration mechanism and a feed block 105 movably supported on a second feed support 104, the second feed support 104 being supported on the machine frame 1. The direct vibration mechanism comprises a direct vibration device supported on the first feeding support 101 and a direct vibration rail 103 installed on an output end of the direct vibration device, a feed slot 1031 extending along the length direction of the direct vibration rail 103 is arranged on the direct vibration rail 103, the feed slot 1031 penetrates through the direct vibration rail 103, one end of the feed slot 1031 is connected with an output end of the vibration disc 102, and workpieces on the vibration disc 102 gradually rise along the spiral edge of the vibration disc 102 and then enter the feed slot 1031 from the output end. Preferably, the width of the feed slot 1031 is comparable to the size of the workpieces, and only one workpiece can be accommodated in the width direction of the feed slot 1031 at the same time. When the vibration plate is used, the workpiece can be conveyed to the straight vibration rail 103 by only vibrating the workpiece in the workpiece vibration plate 102 through the vibration plate 102. The vibratory pan 102 and the linear vibrator are both of the prior art and will not be described in detail herein.

The upper block 105 extends in a direction perpendicular to the straight vibration rail 103, and a plurality of upper troughs 106 are provided on a side of the upper block 105 close to the straight vibration rail 103, the upper troughs 106 are provided on an upper surface of the upper block 105 and open to a side of the support rail 103, the plurality of upper troughs 106 are uniformly provided along a length direction of the upper block 105, and the size of the upper troughs 106 is equivalent to that of a workpiece, and only one workpiece can be accommodated in each upper trough 106. When the feeding block 105 moves along the length direction thereof, the feeding trough 106 is aligned with the feeding trough 1031 in sequence, so that the workpiece can be moved into the feeding trough 106, and when the workpiece is fed, the height of the bottom of the feeding trough 106 is equal to or slightly lower than that of the bottom of the feeding trough 1031, so that the workpiece can smoothly enter the feeding trough 106.

Since soldering is performed only on one side having the conductive contacts during soldering, it is necessary to ensure that the conductive contacts of the inductor all face in the same direction, and for this purpose, a positive and negative detection sensor 114 is provided on one side of the vibration plate 102, the positive and negative detection sensor 114 is used to detect the posture of the workpiece on the spiral edge of the vibration plate 102, and only the workpiece with the conductive contacts facing upward is in the correct posture, and the workpiece with the incorrect posture cannot be moved out of the vibration plate 102. Further, in order to prevent the workpiece with an incorrect posture from moving forward, a blowing nozzle 115 is provided at a position on one side of the vibration plate 102 and near the forward/reverse detection sensor 114, when the forward/reverse detection sensor 114 detects that the conductive contact of the workpiece is not facing upward, it is determined that the posture of the workpiece is not correct, and the blowing nozzle 115 is controlled to blow the workpiece off from the spiral edge of the vibration plate 102. The positive and negative detection sensor 114 determines whether the conductive contact of the workpiece faces upward according to the light reflection condition of the surface of the workpiece, the light reflection degree of the conductive contact is different from the light reflection degree of other parts of the workpiece, and the data returned by the sensor is different, so that whether the conductive contact of the workpiece faces upward can be determined. The forward and reverse detection sensor 114 adopts an optical fiber sensor with the model number of E3X-ZD 11.

A through hole 107 is provided at a position of the loading block 105 corresponding to the loading slot 106, a workpiece in-place sensor 113 is provided at a loading position corresponding to the movement of a workpiece from the feeding slot 1031 to the loading slot 106, preferably, the workpiece in-place sensor 113 employs a photoelectric sensor, an emitting end and a receiving end of the photoelectric sensor are respectively located at two sides of the loading block 105, and when the loading slot 106 is at the loading position, the emitting end and the receiving end are aligned with the through hole 107, so that when loading is performed, if the receiving end changes from being able to receive a signal of the emitting end to being unable to receive a signal of the emitting end, it is determined that the loading is completed if the through hole 107 is blocked, the loading block 105 moves, and the next loading slot 106 is loaded until all the loading slots 106 are completed.

A striker plate 116 is provided on the second feeding support 104, the striker plate 116 extends along the length direction of the feeding block 105, and the second feeding support 104 is provided on the side of the feeding block 105 close to the straight vibrating rail 103 and the striker plate 116 is close to or almost in contact with the side of the feeding block 105 close to the straight vibrating rail 103, and the height of the upper surface of the striker plate 116 is equal to the height of the feeding block 105, the striker plate 116 is provided on the side of the feeding position where the feeding has been completed, and the length thereof is equal to the length of the feeding block 105, so that when the feeding chute 106 moves to the side after the feeding is completed, the striker plate 116 can block the opening of the feeding chute 106 toward the side of the straight vibrating rail 103 to prevent the workpiece from falling from the opening of the side of the feeding chute 106 during the movement of the feeding block 105.

Further, relative to the feeding position, a waste blowing air pipe 117 is arranged on the side, opposite to the striker plate 116, of the second feeding support 104, an air outlet end of the waste blowing air pipe 117 is close to the feeding position, and when the feeding chute 106 passes through the air outlet end of the waste blowing air pipe 117 before feeding, the waste blowing air pipe 117 is controlled to blow air, so that impurities and the like in the feeding chute 106 can be blown out of the feeding chute 106.

Further, a material blocking plate 118 is provided at the rear end of the upper block 105 as viewed in the moving direction of the upper block 105 at the time of loading, the material blocking plate 118 extends in the moving direction of the upper block 105, and a side surface of the material blocking plate 118 facing the straight vibration guide 103 is aligned with a side surface of the upper block 105 facing the straight vibration guide 103, so that when the upper block 105 is out of contact with the straight vibration guide 103 during the movement, the vibration plate 102 and the straight vibration mechanism continue to operate, and the falling of the workpiece from the straight vibration guide 103 can be effectively prevented by the material blocking plate 118.

The feeding device is characterized in that a feeding screw rod 109 parallel to the moving direction of a feeding block 105 is arranged on the second support 104, a feeding slider 1091 is in threaded fit with the feeding screw rod 109, a feeding lifting support 110 is arranged on the feeding slider 1091, a feeding lifting carriage 112 is arranged on the feeding lifting support 110 in a lifting manner, the feeding block 105 is fixed on the feeding lifting carriage 112, a feeding motor 119 is connected to one end of the feeding screw rod 109 in a transmission manner, and the feeding block 105 can be driven to move back and forth along the length direction of the feeding block by controlling the rotation of the feeding motor 119. A feeding lifting cylinder 108 is arranged on the feeding lifting support 110, the upper end of the cylinder rod of the feeding lifting cylinder 108 is connected with a feeding lifting sliding frame 112, and the feeding block 105 can be driven to move up and down by controlling the stretching of the cylinder rod of the feeding lifting cylinder 108. When the cylinder rod of the feeding lifting cylinder 108 extends, the height of the bottom of the feeding groove 106 is at least higher than that of the bottom of the feeding groove 1031, so that when the workpieces on the feeding block 105 are taken away by the material taking mechanism 200 described below, and the feeding block 105 returns to the process of re-feeding, the workpieces in the feeding groove 1031 can be prevented from entering the feeding groove 106 by raising the bottom of the feeding groove 106 above the bottom of the feeding groove 1031, until the feeding block 105 returns to the initial position, the cylinder rod of the feeding lifting cylinder 108 retracts, and the height of the bottom of the feeding groove 106 is equal to or slightly lower than that of the bottom of the feeding groove 1031 at the moment so as to feed the feeding groove 106.

The automatic soldering device further comprises a material taking mechanism 200, wherein the material taking mechanism 200 comprises a material taking bracket 201 supported on the second feeding bracket 104, a rotating bracket 202 rotatably supported on the material taking bracket 201, and a plurality of material taking suction nozzles 208 supported on the rotating bracket 202, the plurality of material taking nozzles 208 are arranged in parallel with the length direction of the upper material block 105 and the suction direction of the material taking nozzles 208 is perpendicular to the rotation axis of the rotary bracket 202, the plurality of material taking nozzles 208 are positioned on the opposite side of the upper position from the waste material blow pipe 117, the upper material block 105 can move to a position right under a plurality of material taking nozzles 208 after the material feeding is completed, the number of the plurality of material taking nozzles 208 is the same as that of the upper material groove 106, when the upper material block 105 moves to a position right below the plurality of material taking nozzles 208, the material taking nozzles 208 correspond to the upper material chute 106 one to one, and can suck up the workpieces on the upper material chute 106.

Specifically, a plurality of the material taking nozzles 208 are fixed to a nozzle mounting plate 210, and the nozzle mounting plate 207 is movable back and forth along the suction direction of the material taking nozzles 208 with respect to the rotating bracket 202. When the upper material block 105 moves to a position right below the material taking suction nozzle 208, the suction direction of the material taking suction nozzle 208 faces downward, the material taking suction nozzle 208 moves downward to a position of a workpiece first, then sucks air to suck up the workpiece, after the workpiece is sucked up, the suction nozzle mounting plate 207 drives the material taking suction nozzle 208 to retract, and after the retraction, the suction nozzle mounting plate 207 rotates along with the rotating bracket 202. Specifically, the two ends of the nozzle mounting plate 207 are provided with guide posts 204 parallel to the suction direction, a guide block 203 is arranged at a position corresponding to each guide post 204 on the xuan-war support 202, and the guide posts 204 slidably pass through the rotating support 202 and the guide blocks 203 to guide the movement of the nozzle mounting plate 207. The rotary support 202 is provided with a material taking lifting cylinder 209, a cylinder rod of the material taking lifting cylinder 209 is parallel to the adsorption direction, the free end of the cylinder rod is connected with the suction nozzle mounting plate 207, and the material taking suction nozzle 208 can stretch out and draw back by controlling the stretching of the material taking lifting cylinder 209.

The rotary bracket 202 is further provided with an air vent plate 205, the air vent plate 205 is of a hollow structure, the plurality of material taking suction nozzles 208 are respectively communicated with the hollow part of the air vent plate 205 through connecting pipes 206, the material taking suction nozzles 208 can suck or release workpieces by controlling the air pressure of the hollow structure of the air vent plate 205, the plurality of material taking suction nozzles 208 can be simultaneously controlled through the air vent plate 205, and the structure is simplified.

Further, a rotating motor 210 in transmission connection with the rotating bracket 202 is arranged on the material taking bracket 201, and the rotation of the material taking suction nozzle 208 can be controlled by controlling the rotation of the rotating motor 210.

The soldering device also includes a material moving mechanism 300 for moving the workpiece between different stations. The material moving mechanism 300 comprises a plurality of clamps 314 supported on the frame 1 through a material moving frame 301, the clamps 314 can move in a vertical plane perpendicular to the rotation axis of the rotating bracket 202, the number of the clamps 314 is the same as that of the material taking nozzles 208, the clamps 314 can selectively move to the positions right above the material taking nozzles 208 when moving in the vertical plane, when the plurality of clamps 314 move to the positions right above the material taking nozzles 208, the rotating bracket 201 drives the material taking nozzles 208 to rotate to face the clamps 314, then the clamps 314 move downwards to clamp the workpieces on the material taking nozzles 208, and further, the workpieces can be driven to move between different stations.

A plurality of the clamps 314 are supported on the material moving rack 301 through a horizontal moving module and a vertical moving module, and the clamps 314 are fixed on the vertical moving module. The horizontal moving module comprises a horizontal moving material plate 303 which is supported on the material moving frame 301 through a guide rail sliding block assembly in a horizontally moving mode along the direction perpendicular to the rotating axis of the rotating support 202, the horizontal moving material plate 303 is driven through a belt transmission structure arranged on the material moving frame 301, the belt transmission structure is driven by a horizontal driving motor 302, and the clamp 314 can be driven to move back and forth along the horizontal direction through controlling the rotation of the horizontal driving motor 302.

The vertical moving module comprises a vertical supporting plate 315 vertically supported on the horizontal material moving plate 303, a vertical material moving slider 316 vertically movably supported on the vertical supporting plate 315 through a guide rail slider assembly, and the clamp 314 is rotated on the vertical material moving slider 316. Specifically, a vertical material moving motor 305 with an output shaft extending downwards is supported at the upper end of the vertical support plate 315, a vertical material moving screw rod 306 is connected to the output shaft of the vertical material moving motor 305 in a transmission manner, a vertical material moving nut pair 307 in threaded fit with the vertical material moving screw rod 306 is arranged on the vertical material moving slide block 316, and the clamp 314 can be driven to move up and down by controlling the rotation of the vertical material moving motor 305.

Further, a clamp fixing plate 308 is arranged on one side of the vertical moving slider 316, which is away from the vertical supporting plate 315, the plane where the clamp fixing plate 308 is located is vertically arranged and perpendicular to the vertical plane, a clamp hanging plate 317 is arranged at the lower end of the clamp fixing plate 308, the clamps 314 are hung on the clamp hanging plate 317, the plurality of clamps 314 are arranged along the same direction as the plurality of material taking suction nozzles 208, and the plurality of clamps 314 correspond to the plurality of material taking suction nozzles 208 one to one.

Each of the clamps 314 includes a fixed side 318 for being fixed to the clamp suspension plate 317 and a movable side 319 hinged to the fixed side 318 by a hinge shaft 320 provided between both ends of the fixed side 318, the movable side 319 being rotatable with respect to the fixed side 318 to vary a distance between a lower end of the fixed side 318 and a lower end of the movable side 319, the lower end of the clamp 314 being a clamping end, to thereby clamp and unclamp a workpiece. Further, a return spring which is always in a compressed state is provided between the movable side 319 and the fixed side 318 above the hinge shaft 320 to ensure that the clamp 314 is always in a clamped state when not subjected to an external force.

Further, a plurality of clamp opening and closing rollers 313 are arranged on one side, away from the clamp hanging plate 317, of the clamp 314, the clamp opening and closing rollers 313 correspond to the clamps in a one-to-one mode, and the clamp opening and closing rollers 313 can move up and down. The movable side 319 is provided with an inclined surface 321 at a side away from the fixed side 318 and above the hinge shaft 320, the inclined surface 321 is gradually inclined towards a direction away from the fixed side 318 from top to bottom, the clamp opening and closing roller 313 can selectively contact with the inclined surface 321 and generate a moving force on the inclined surface 321, when the clamp opening and closing roller 313 does not contact with the inclined surface, the clamp 321 is in a clamping state under the action of a return spring, when the clamp opening and closing roller 313 moves downwards for a certain distance and then contacts with the inclined surface and has a certain force, the upper end of the movable side 319 is driven towards the upper end of the fixed side 318, the lower end of the movable side 319 moves towards a direction away from the lower end of the fixed side 318, and at the moment, the clamp 314 releases the workpiece.

In order to realize the simultaneous clamping or loosening of a plurality of clamps 314, a plurality of clamp opening and closing rollers 313 are rotatably supported on the same clamp opening and closing support shaft 312, two ends of the clamp opening and closing support shaft 312 are fixed on a clamp linkage plate 310 through clamp opening and closing support blocks 311, the clamp linkage plate 310 is fixed on a clamp fixing plate 308 through a clamping cylinder fixing plate 321, and the clamp linkage plate 310 can move up and down relative to the clamp fixing plate 308 to drive the plurality of clamp opening and closing rollers 313 to move up and down. The clamp cylinder fixing plate 321 is provided with a clamp opening and closing cylinder 309, a cylinder rod of the clamp opening and closing cylinder 309 is arranged downwards and connected with the clamp linkage plate 310, and the clamp opening and closing roller 313 can move up and down by controlling the clamp opening and closing cylinder 309 so as to clamp or loosen the clamp.

When the material taking suction nozzle 208 is used, after the material taking suction nozzle 208 adsorbs a workpiece, the workpiece is rotated by 180 degrees, the workpiece faces upwards, then the clamp 314 is controlled to move right above the material taking suction nozzle 208, the clamp 314 is driven to move downwards to the position of the corresponding workpiece, the clamp opening and closing cylinder 309 retracts, the clamp 314 clamps the workpiece, and the clamp 314 drives the workpiece to a machining station to machine the workpiece. When the clamp 314 is gripping the workpiece, the conductive contacts of the workpiece face downward.

Automatic soldering tin device is still including setting up tin stove subassembly 600 that just is located and moves work or material rest 301 on the frame 1, tin stove subassembly 600 includes supports tin stove 602 in frame 1 through tin stove support 601, molten tin liquid has been placed to the top opening of tin stove 602 in tin stove 602, move material mechanism 300 and drive the position department that the work piece removed tin stove 602, insert the electrically conductive contact of work piece in the tin liquid, then take out, can realize soldering tin. In order to ensure that the conductive contacts of the workpieces on the plurality of clamps 314 can be inserted into the molten tin, the size of the inner cavity of the tin furnace 602, which is parallel to the arrangement direction of the plurality of clamps 314, is larger than the arrangement size of the plurality of clamps 314.

A heating assembly is arranged around the tin furnace 602, and the heating principle of the heating assembly is the same as the working principle of the electric soldering iron in the prior art, and the detailed description is omitted here.

The tin furnace assembly 600 further comprises an automatic tin feeder 605 arranged on the frame 1, the automatic tin feeder 605 is used for feeding tin to the tin furnace 602, a tin strip is wound on a tin reel 604 of the automatic tin feeder 605, and the automatic tin feeder 605 feeds the tin strip on the tin reel 604 into the tin furnace 602 to supplement the tin liquid. The automatic tin feeder 605 may be an automatic tin feeder of TK379, manufactured by peker, or other types known in the art. Above the tin furnace 602 is supported a feed tube 606 through which the tin bar passes into the tin furnace 602.

Further, a tin surface height detecting head 603 is arranged right above the tin liquid in the tin furnace, the tin surface height detecting head 603 adopts a proximity sensor with the model of FBS-03X0.6N1-D3, and naturally, other models of proximity sensors in the prior art can also be adopted. The tin surface height detecting head 603 detects the change of the tin surface to control the automatic tin feeding machine 605 to feed the tin bar into the tin furnace 602 so as to ensure that the tin surface in the tin furnace 602 is always at the same height, and thus, the material moving assembly 600 only needs to descend for the same distance every time.

The automated soldering apparatus also includes a flux assembly 400 located directly below the cradle 301, the flux assembly 400 being configured to provide flux prior to soldering. The soldering flux assembly 400 comprises an outer groove 402 supported on the frame 1 through a soldering support 401, a soldering flux groove 403 positioned in the outer groove 402, and a sponge 404 positioned in the solder resist groove 403, the clamp 314 can drive a workpiece to be inserted into the sponge 404 of the soldering flux groove 403, and before soldering, soldering flux is added on the surface of the conductive contact to help soldering. The soldering flux component 400 is arranged between the material taking component 200 and the tin furnace component 600, so that the material moving component 300 drives a workpiece to sequentially complete the actions of adding soldering flux and soldering tin.

The top plate 411 is arranged at the top of the soldering flux groove 403, the top plate 411 covers the notch of the soldering flux groove 402, the pressing holes 412 are formed in the top plate 411, a plurality of workpieces on the fixture 314 enter from the pressing holes 412 to be in contact with the sponge 404, the soldering flux is absorbed in the sponge 404, and when the conductive contacts of the sponge workpieces are in contact with the sponge 404, the soldering flux can be stained on the conductive contacts. The welding assisting support 401 is rotatably provided with a linkage rod 407, the linkage rod 407 is provided with a pressing plate 406, one side of the pressing plate 406 in the width direction is arranged on the linkage rod 407, the other side of the pressing plate 406 in the width direction is provided with a folded edge which can be inserted into the pressing hole 412, and after the soldering flux is added into the sponge 404, the folded edge is inserted into the pressing hole 412, so that the soldering flux can be uniformly distributed in the sponge 404 on one hand, and redundant soldering flux can be pressed out on the other hand. In order to ensure that the folded edge can be smoothly inserted into the press hole 412, the dimension of the press plate 406 in the length direction is slightly smaller than the length of the press hole 412.

One end of the linkage rod 407 is provided with a swing rod 408, the lower end of the swing rod 408 is connected with the free end of a cylinder rod of a driving cylinder 409, the free end of a cylinder body of the driving cylinder 409 is fixed on the frame 1 through a connecting plate 410, and the rotation of the pressing plate 406 can be realized by controlling the extension and retraction of the driving cylinder 409 so as to be inserted into the pressing hole 412 or be removed from the pressing hole 412. When the workpiece needs to be fluxed, the pressure plate 406 is opened to ensure that the workpiece can be inserted into the press hole 412.

Further, an open groove 405 is provided at the top end of the flux groove 403, the open groove 405 penetrates the sidewall of the flux groove 403 along the width direction of the sidewall of the flux groove 403, and when the pressing plate 406 presses the sponge 404, the excessive flux flows out from the open groove 405 into the outer groove 402. One end of the soldering flux groove 403 is provided with a liquid inlet 413, and soldering flux can be injected into the sponge 404 through the liquid inlet 413.

The automatic tin soldering device further comprises a tin scraping mechanism 700 and a tin cutting mechanism 700, and the tin scraping mechanism and the tin cutting mechanism can be divided into a tin scraping mechanism and a tin cutting mechanism. Before the workpiece is inserted into the tin liquid, the tin surface is oxidized or the air is cooled to be not in a pure liquid state, and at the moment, a tin scraping mechanism is needed to scrape the tin on the surface layer of the tin surface.

The tin scraping mechanism comprises a tin scraping plate 702 supported on the frame 1 through a mounting frame 704, the tin scraping plate 702 can move back and forth along the horizontal direction perpendicular to the axis of the rotating bracket 202, and the lower end of the tin scraping plate 702 is slightly lower than the height of a tin surface so as to scrape the surface layer of tin liquid to one side of the tin furnace 602 during movement. The size of the tin scraping plate 702 is slightly smaller than the size of the inner cavity of the tin furnace 602 along the direction parallel to the axis of the rotating bracket 202, so that the lower end of the tin scraping plate 702 can be inserted below the tin surface.

Specifically, the tin scraping plate 702 is connected to a tin scraping bracket 708 through a tin scraping support rod 713, the tin scraping bracket 708 is supported in the mounting frame 704 in a manner of being capable of moving back and forth along a direction perpendicular to the axis of the rotating bracket 202, and the tin scraping bracket 708 is arranged in the mounting frame 704 through a guide rail and a slider assembly. A tin scraping screw 709 is rotatably provided in the mounting frame 704, a tin scraping nut pair 706 is screwed onto the tin scraping screw 709, the tin scraping nut pair 706 is connected to the tin scraping bracket 708, and the tin scraping screw 709 is horizontally provided and its axis is perpendicular to the axis of the rotating bracket 202. A tin scraping motor 705 in transmission connection with one end of the tin scraping screw 709 is further arranged in the mounting frame 704, and the tin scraping plate 702 can be driven to move by controlling the rotation of the tin scraping motor 705.

When the conductive contact of the workpiece is taken out of the molten tin, the tin on the conductive contact may adhere to the tin in the tin furnace 602, and the adhered tin can be cut by the tin cutting mechanism.

The tin cutting mechanism includes a steel wire 701 extending in a direction parallel to the axis of the rotating bracket 202 and capable of moving back and forth in a horizontal direction perpendicular to the axis of the rotating bracket 202. Two ends of the steel wire 701 are respectively connected to the tin-cutting linkage plate 712 located in the mounting frame 704 through two tin-cutting connecting rods 703, the two tin-cutting connecting rods 703 are parallel to each other and aligned with each other in a direction parallel to the axis of the rotating bracket 202, and two ends of the steel wire 701 are fixed at one end of the corresponding tin-cutting connecting rod 703, which is far away from the tin-cutting linkage plate 712. A tin cutting screw 711 is rotatably arranged in the mounting frame 704, the tin cutting screw 711 extends along the horizontal direction perpendicular to the axis of the rotating support 202, the tin cutting screw 711 is in threaded connection with the tin cutting linkage plate 712, a tin cutting motor 710 is arranged outside the mounting frame 704, the tin cutting motor 710 is in transmission connection with the tin cutting screw 711, the back-and-forth movement of the steel wire 701 can be controlled by controlling the tin cutting motor 710, and tin between the workpiece and a tin surface is cut off when the steel wire 701 passes through the space between the workpiece and the tin surface.

The steel wire 701 and the tin scraping plate 702 are located on the same side with respect to the mounting frame 704. In addition, in the actual production process, since the tin scraping and the tin cutting are performed first, the steel wire 701 is arranged to be farther away from the mounting frame 704 than the tin scraping plate 702, the length of the steel wire 701 is greater than that of the tin scraping plate 702, the length of the tin cutting connecting rod 703 is greater than that of the tin scraping supporting rod 713, and the two tin cutting supporting rods 713 are located between the two tin cutting connecting rods 703, so that the interference generated when the tin scraping and the tin cutting are performed in sequence can be avoided.

Moreover, the height of the steel wire 701 is higher than that of the lower end of the tin scraping plate 702, because in actual production, the distance between the workpiece and the tin surface is very close during tin cutting, namely, tin cutting is performed just when the workpiece leaves the tin surface.

The automatic soldering device further includes a flattening mechanism 500. After the tin cutting is completed, the tin on the workpiece needs to be flattened by the flattening mechanism 500.

The flattening mechanism 500 includes a plurality of movable columns 506 supported on the frame 1 by flattening brackets 501, and the number of the movable columns 506 is the same as that of the clamps 314, and corresponds to one another. After the tin cutting is finished, the clamp 314 drives the workpiece to rise to a certain height, the movable column 506 moves to the whole position of the clamp 314, and the clamp 314 drives the workpiece to move downwards and generate acting force with the movable column 506 so as to flatten tin on the workpiece.

Specifically, the movable column 506 is mounted on a movable column mounting plate 507, the movable column mounting plate 507 is mounted on a flattening mounting plate 502, the flattening mounting plate 502 is mounted on a flattening support 501 through a slide rail and a slide block assembly, and the flattening mounting plate 502 can move back and forth along a horizontal direction perpendicular to the axis of the rotating support 202 relative to the flattening support 501 to move the movable column 506 in or out from the whole of the fixture 314.

The one end of activity post 506 is disc type structure, and the mounting hole 510 on the activity post mounting panel 507 is passed to the other end to be provided with spacing ring 509 at the other end, the diameter of disc type structure and the diameter of spacing ring 509 all are greater than the diameter of mounting hole 510, are spacing activity post 506 on activity post mounting panel 507 through spacing ring 509 and disc type structure. The cover is equipped with buffer spring 508 on activity post 506, buffer spring 508's upper end supports and leans on disc type structure, and the lower extreme supports and leans on activity post mounting panel 507, buffer spring 508 is in the state of compressed all the time, when the work piece pushed down, can guarantee sufficient effort on the one hand through spring buffer spring 508, can play the effect of buffering on the one hand, avoids crushing work piece or other structures.

A flattening translation cylinder 503 is arranged on the flattening support 501, a cylinder rod of the flattening translation cylinder 503 extends along a horizontal direction perpendicular to the axis of the rotating support 202 and is connected with the flattening mounting plate 502, and the flattening translation cylinder 503 can control the back-and-forth movement of the movable column 506.

Transverse plates 513 are arranged at two ends of the movable column mounting plate 507, and the ends, far away from each other, of the two transverse plates 513 are supported on the flattening mounting plate 502 through vertical plates 512 respectively. An L-shaped plate 514 is arranged at the upper end of each vertical plate 512, one end of each L-shaped plate 514 is fixedly connected with the upper end of the corresponding vertical plate 512, and the other end of each L-shaped plate 514 extends to the position right above the transverse plate 513. A leveling screw 511 is rotatably provided at a horizontal portion of the L-shaped plate 514, and the leveling screw 511 is screw-coupled to the cross plate 513, so that the level of the movable mounting plate 507 can be adjusted when the leveling screw 511 is rotated. A stop ring 515 is arranged on the leveling screw 511, the horizontal part of the L-shaped plate 514 is positioned between the stop ring 515 and the screw head of the leveling screw 511, and the distance between the stop ring 515 and the screw head is equal to the thickness of the horizontal part of the L-shaped plate 514, so that the leveling screw 511 cannot move in the vertical direction, and the movable column mounting plate 507 is prevented from shaking in the working process.

The flattening mechanism 500 and the tin scraping and cutting mechanism 700 are located on the opposite side of the tin furnace 602 to avoid interference during operation.

The automatic tin soldering device further comprises a blanking mechanism 1000. Unloading mechanism 1000 is including supporting unloading mounting panel 1001 in frame 1 and being used for adsorbing the adsorption module on it with the work piece, and after the work piece on anchor clamps 314 accomplished the technology that flattens, the flow of whole soldering tin is accomplished, moves material mechanism 300 and drives the work piece and remove directly over the adsorption module, places the work piece on the adsorption module, and the adsorption module has magnetism, can adsorb the work piece and remove appointed place.

The adsorption module is supported on the blanking mounting plate 1001 through an adsorption mounting frame 1015, the adsorption module comprises an adsorption groove 1004 which is rotatably supported on the adsorption mounting frame 1015 and is provided with an opening on one side, a plurality of magnets 1006 which are arranged in the adsorption groove 1004 through a magnet mounting plate 1005, and a cover plate 1007 which is arranged at the opening of the adsorption groove 1004, the number of the magnets 1006 is the same as that of the clamps 314, and the magnets are in one-to-one correspondence, the magnet mounting plate 1005 can move back and forth in the adsorption groove 1004 along the direction far away from or close to the cover plate 1007, and the magnets 1006 are fixed on one side of the magnet mounting plate 1005 facing the cover plate. When blanking is needed, the adsorption module is moved to a blanking position, the cover plate 1007 is positioned above the adsorption groove 1004, the material moving mechanism 300 moves a workpiece to the blanking position and places the workpiece on the surface of one side, away from the adsorption groove 1004, of the cover plate 1007, the magnet mounting plate 1005 drives the magnet 1006 to be close to or contact with the cover plate 1007, and the magnet 1006 can adsorb the workpiece positioned on the cover plate 1007; when the adsorption module moves the workpiece to the designated position, the adsorption module rotates 180 degrees, the workpiece faces downwards, the magnet mounting plate 1005 drives the magnet 1006 to move a certain distance towards the direction far away from the cover plate 1007, and after the adsorption force of the magnet 1006 to the workpiece is reduced to a certain value, the workpiece falls off from the cover plate 1007.

An adsorption cylinder 1008 is arranged on one side of the adsorption groove 1004, which is far away from the cover plate 1007, a cylinder rod of the adsorption cylinder 1008 is connected with the magnet mounting plate 1005 and is arranged in parallel to the moving direction of the magnet mounting plate 1005, and then the magnet 1006 can move back and forth by controlling the extension and retraction of the cylinder rod of the adsorption cylinder 1008.

Furthermore, two adsorption guide columns 1010 parallel to the moving direction of the magnet mounting plate 1006 are arranged on the side of the magnet mounting plate 1005 away from the cover plate 1007, and the two adsorption guide columns 1010 are symmetrically arranged relative to the axis of the adsorption cylinder 1008. The two adsorption guide columns 1010 penetrate through the bottom wall of the adsorption groove 1004, and a linear bearing 1016 is arranged between the two adsorption guide columns 1010 and the bottom wall of the adsorption groove 1004. Further, the adsorption guide post 1010 is sleeved with an adsorption spring 1009, one end of the adsorption spring 1009 abuts against the linear bearing 1016 or the bottom wall of the adsorption groove 1004, the other end of the adsorption spring 1009 abuts against the free end of the adsorption guide post 1010, and the adsorption spring 1009 is always in a compressed state, so that when the cylinder rod of the adsorption cylinder 1008 extends out, the adsorption spring 1009 can reduce the extending speed of the cylinder rod, and reduce the vibration of the magnet mounting plate 1005 and the magnet 1006 during movement.

The both sides of absorption groove 1004 rotatably support on adsorbing mounting bracket 1015, be provided with on adsorbing mounting bracket 1015 and be used for driving the rotatory absorption motor 1017 in absorption groove 1004, can control the orientation of apron 1007 through control absorption motor 1017.

The suction mount 1015 is movably mounted to the blanking mount plate 1001 in a direction parallel to the axis of the rotary bracket 202. The blanking mounting plate 1001 is provided with a blanking guide rail 1011 extending in parallel to the axial direction of the rotating bracket 202, and the adsorption mounting frame 1015 is provided with a blanking slider 1002 matched with the blanking guide rail 1011. A blanking motor 1014 is arranged on the blanking mounting plate 1001, and the blanking motor 1014 drives the blanking slide block 1002 to move in a belt transmission mode. The blanking mounting plate 1001 and a portion of the blanking guide 1011 extend directly below the material transfer rack 301 so that the suction module can be moved directly below the material transfer rack 301 to receive a workpiece on the material transfer assembly 300.

The blanking mechanism 1000 further includes a conveyor belt 1012, the conveyor belt 1012 being supported on the frame 1 and located on one side of the transfer frame 301 with respect to the axial direction parallel to the rotary support 202, and one end of the conveyor belt 1012 being located directly below the suction module as viewed in the axial direction parallel to the rotary support 202, so that when the suction module receives a workpiece on the transfer assembly 300, the suction module moves directly above the conveyor belt 1012 to place the workpiece on the conveyor belt 1012. A material receiving box 1013 is placed right below the other end of the conveying belt 1012, a workpiece enters the material receiving box 1013 under the driving of the conveying belt 1012, and the workpiece of the material receiving box 1013 is an inductor after soldering is completed.

The automated soldering apparatus also includes a cleaning mechanism 900 for cleaning the fixture 314. The cleaning mechanism 900 includes two cloth reels 902 rotatably supported on the frame 1 by a cleaning support 901, a cloth 904 wound around the two cloth reels 902, the two cloth reels 902 being arranged in a direction parallel to the axis of the rotating support 202, and the axes of the two cloth reels 902 being horizontally disposed and perpendicular to the axis of the rotating support 202, the height of the cloth between the two cloth reels 902 being lower than the height of the lower end of the clamp 314 at the uppermost position, a plurality of the clamps 314 being movable to just above the cloth 904 between the two cloth reels 902, the clamp 314 then being moved downward and pushing against the cloth 904, the lower end of the clamp 314 being in an open state, the width of the cloth 904 being larger than the size of the opening when the lower end of the clamp 314 is open, so that when the clamp 314 pushes against the cloth, both sides of the cloth 904 are bent downward and enter the opening of the clamp 314, the bent portion of the cloth 904 being in contact with the inner walls of the corresponding sides of the opening of the clamp 314, the cloth spool 902 moves the cloth strip 904 back and forth to clean the workpiece-holding portion of the fixture 314.

The two cloth reels 902 are connected by a belt drive to ensure the synchronization of the rotation, and one cloth reel 902 is connected with a cloth strip driving motor 909 in a driving way.

Further, a cleaning plate 903 is supported on the cleaning support 901, a plurality of support columns 906 are arranged on one side of the cleaning plate 903 facing the cloth reels 902, the axes of the support columns 906 are parallel to the axes of the cloth reels 902, the support columns 906 penetrate through the vertical plane where the two cloth reels 902 are located, the cloth strips located between the two cloth reels 902 are supported above the support columns 906, gaps for inserting corresponding clamps are formed between the adjacent support columns 906, the gaps correspond to the clamps 314 one by one, and the cloth strips 904 can enter the lower end openings of the clamps 314 more easily when the clamps 314 press the cloth strips through the support columns 906.

The height of the support column 906 is higher than that of the axis of the cloth rolling disk 902, and a guide column 907 is arranged between the support column 906 on two sides and the cloth rolling disk 902 on the corresponding side so that the cloth strip 904 can be tightly attached to the support column 906. The height of the guide posts 907 is lower than the height of the support posts 906.

In the transmission path of the cloth strip 904, a cleaning liquid tank 905 is arranged between the guide column 907 and the cloth winding disc 902 on the corresponding side, a roller 910 is arranged in the cleaning liquid tank 905, the axial height of the roller 910 is lower than that of the cloth winding disc 902, the cloth strip 904 bypasses from the lower part of the roller 910, alcohol is filled in the cleaning liquid tank 905, the liquid level of the alcohol is higher than that of the lowest position of the roller 910, and therefore when the cloth strip 904 bypasses from the lower part of the roller 910, the cloth strip 904 is stained with the alcohol, and a better cleaning effect can be achieved. The number of the rollers 910 is two to increase the contact time of the cloth strip 904 with the alcohol.

Further, a tension wheel 908 is provided in the driving path of the cloth strip 904 to ensure that the cloth strip has sufficient tension.

The cleaning mechanism 900 is disposed between the blanking mechanism 1000 and the material taking mechanism 200 along a horizontal direction perpendicular to the axis of the rotating bracket 202, when the clamp 314 places the workpiece on the blanking mechanism 1000, the clamp 314 will continue to clamp the workpiece on the material taking mechanism 200, and during the process that the clamp 314 moves to the material taking mechanism 200, the clamp 314 will pass through the cleaning mechanism 900 first, so that the stroke of the clamp 314 is saved.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An automatic soldering tin device for inductance production, characterized by includes:

a frame;

a solder pot assembly comprising a solder pot supported on a frame;

the tin cutting mechanism comprises a steel wire, the steel wire can move back and forth along the direction perpendicular to the length direction of the steel wire, and the steel wire is located right above the tin furnace and lower than the height of the inductor at the highest position on the material moving mechanism.

2. The automatic tin soldering device for inductance production according to claim 1, further comprising a feeding mechanism and a material taking mechanism, wherein the feeding mechanism comprises a feeding block movably supported on the rack by a second feeding support, the length direction of the feeding block is parallel to the moving direction of the feeding block, a plurality of feeding grooves are arranged on the upper surface of the feeding block in the length direction, the plurality of feeding grooves are uniformly arranged along the length direction of the feeding block, the material taking mechanism comprises a material taking support supported on the second feeding support, a rotating support rotatably supported on the material taking support, and a number of material taking nozzles supported on the rotating support and equal to the number of the feeding grooves, the plurality of material taking nozzles are arranged in the length direction parallel to the feeding block, the adsorption direction of the material taking nozzles is perpendicular to the rotation axis of the rotating support, the feeding block can be moved into or moved out from the position under the material taking nozzles, the material moving mechanism obtains the inductor from a material taking suction nozzle.

3. The automatic tin soldering device for inductance production according to claim 2, wherein the feeding mechanism further comprises a vibrating tray and a direct vibrating mechanism, the direct vibrating mechanism comprises a direct vibrator and a direct vibrating rail mounted on an output end of the direct vibrator, a feeding chute extending along a length direction of the direct vibrating rail is arranged on the direct vibrating rail, the length direction of the direct vibrating rail is perpendicular to a length direction of the feeding block, the feeding chute is arranged on one side of the feeding block close to the direct vibrating rail, an opening is arranged on one side of the feeding chute facing the direct vibrating rail, and the inductance can enter the feeding chute from the feeding chute.

4. The automatic tin soldering device for inductance production according to claim 2, wherein the material moving mechanism comprises a plurality of clamps which can move back and forth in a vertical plane perpendicular to the rotation axis of the rotating bracket, the number of the clamps is equal to the number of the material taking nozzles, and the clamps and the material taking nozzles are aligned one by one in a direction perpendicular to the rotation axis of the rotating bracket when viewed from top.

5. The automatic tin soldering device for inductance production according to claim 1, further comprising a tin scraping mechanism, wherein the tin scraping mechanism preferably comprises a tin scraping plate which has the same moving direction as the steel wire, the lower end of the tin scraping plate can be inserted below a tin surface, and the size of the tin scraping plate in the direction perpendicular to the moving direction is slightly smaller than that of the inner cavity of the tin furnace in the moving direction.

6. The automatic tin soldering device for inductance production according to claim 4, further comprising a flattening mechanism, wherein the flattening mechanism includes a plurality of movable columns movably supported on the frame by a flattening mounting plate, the flattening mounting plate is movable relative to the frame in a horizontal direction perpendicular to the rotation axis of the rotary bracket, the number of the plurality of movable columns is the same as the number of the material taking nozzles, and the plurality of movable columns are aligned with the material taking nozzles one by one in a direction perpendicular to the rotation axis of the rotary bracket when viewed from above, and the movable columns can move to a position right under the fixture.

7. The automatic tin soldering device for inductance production according to claim 4, further comprising a blanking mechanism, wherein the blanking mechanism comprises a blanking mounting plate supported on the frame and an adsorption module rotatably supported on the blanking mounting plate, and the adsorption module can adsorb the inductance on the moving mechanism.

8. The automatic tin soldering device for inductance production according to claim 7, wherein the adsorption module is supported on the blanking mounting plate through an adsorption mounting frame, the adsorption module comprises an adsorption groove rotatably supported on the adsorption mounting frame and having an opening on one side, a plurality of magnets mounted in the adsorption groove through a magnet mounting plate, and a cover plate arranged at the opening of the adsorption groove, the number of the magnets is the same as that of the clamps, and the magnets are in one-to-one correspondence with the magnets, and the magnet mounting plate can move back and forth in the adsorption groove along the direction away from or close to the cover plate.

9. The automatic soldering device for inductance production according to claim 8, wherein the suction mounting frame is movably mounted to a discharging mounting plate in a direction parallel to an axial direction of the rotary rack, the discharging mechanism further includes a conveyor belt supported on the frame and located on one side of the transfer frame with respect to the axial direction parallel to the rotary rack, and one end of the conveyor belt is located directly below the suction module as viewed in the axial direction parallel to the rotary rack.

10. An automated soldering apparatus for inductance production according to claim 4, further comprising a cleaning mechanism to clean a jig, the cleaning mechanism including a cloth strip arranged at least partially in a direction parallel to the rotation axis of the rotating rack, the jig being movable to directly above a portion of the cloth strip parallel to the rotation axis of the rotating rack, the cloth strip being movable in a length direction thereof.