CN216891490U - Seamless automatic elastic sewing machine - Google Patents

Abstract

The utility model provides a seamless automatic elastic band machine, which comprises a feeding device, a clamping device and an ultrasonic cutter device, wherein the feeding device is used for conveying an elastic band; the clamping device comprises a first mounting seat, a second mounting seat, a third mounting seat, a fourth mounting seat, a first clamping mechanism, a second clamping mechanism and a turnover mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively arranged on the third mounting seat and the fourth mounting seat, the third mounting seat and the fourth mounting seat can respectively move along an X axis and a Y axis relative to the second mounting seat, the second mounting seat can move along the X axis relative to the first mounting seat, and the turnover mechanism is connected with the first clamping mechanism and used for driving the first clamping mechanism to rotate; the ultrasonic cutter device cuts the part to be cut in a hot melting mode, and the head part and the part to be cut are welded together to form an elastic ring. The problem that the butt joint of the elastic band is large can be effectively solved by cutting the elastic band in an ultrasonic hot melting mode.

Description

Seamless automatic elastic sewing machine

Technical Field

The utility model relates to the technical field of sewing, in particular to a seamless automatic elastic sewing machine.

Background

The existing automatic elastic sewing machine sews the elastic band in the following way:

1) the elastic band is pulled by the pulling mechanism to pass through the two clamping mechanisms, and the elastic band is cut after the length of the elastic band meets the sewing requirement;

2) enabling the two clamping mechanisms to respectively clamp the head end and the tail end of the elastic band;

3) enabling the two clamping mechanisms to respectively overturn the head and the tail of the elastic band, and enabling the head and the tail of the elastic band to be attached to form an elastic ring;

4) and the elastic ring is sent to a sewing machine for sewing through the two clamping mechanisms.

The elastic ring obtained by sewing in the mode has the problems of large butt joint, poor sewing flatness and the like, so that the sewing quality is difficult to guarantee.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a seamless automatic elastic band machine, which cuts and fuses an elastic band in a hot melting mode to form an elastic band ring with a required size, can effectively solve the problem that the elastic band ring obtained by adopting the existing elastic band sewing mode has large butt joint, can smooth the welding seam of the elastic band ring, ensures the flatness during subsequent sewing and greatly improves the sewing quality.

In order to achieve the aim, the utility model provides a seamless automatic elastic sewing machine, which comprises a feeding device, a clamping device and an ultrasonic cutter device, wherein:

the feeding device is used for conveying the elastic band;

the clamping device comprises a first mounting seat, a second mounting seat, a third mounting seat, a fourth mounting seat, a first clamping mechanism, a second clamping mechanism and a turnover mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively arranged on the third mounting seat and the fourth mounting seat, the third mounting seat and the fourth mounting seat are respectively arranged on the second mounting seat and can respectively move along an X axis and a Y axis relative to the second mounting seat, the second mounting seat is arranged on the first mounting seat and can move along the X axis relative to the first mounting seat, when the third mounting seat moves along the X axis positive direction relative to the second mounting seat, the first clamping mechanism is driven to move and clamp the head of the rubber band, the turnover mechanism is connected with the first clamping mechanism and is used for driving the first clamping mechanism to rotate, so that the head part is attached to a part to be cut of the elastic band after being turned for 180 degrees, and the X axis is perpendicular to the Y axis;

the ultrasonic cutter device is used for cutting the part to be cut in a hot melting mode and welding the head part and the part to be cut together to form an elastic ring;

when the fourth installation seat is relative the second installation seat moves along the positive direction of the Y axis, the second clamping mechanism is driven to move so as to simultaneously clamp the elastic ring with the first clamping mechanism, and when the third installation seat is relative the second installation seat moves along the negative direction of the X axis, the first clamping mechanism is driven to move relative to the second clamping mechanism along the negative direction of the X axis so as to spread the part to be sewn of the elastic ring.

Optionally, the clamping device further includes a first driving unit, a second driving unit and a third driving unit, the first driving unit is installed on the first installation base and is used for driving the second installation base to move along the X axis relative to the first installation base, and the second driving unit and the third driving unit are both installed on the second installation base and are used for respectively driving the third installation base and the fourth installation base to move along the X axis and the Y axis relative to the second installation base.

Optionally, first clamping mechanism includes first clamping piece, second clamping piece and first die clamping cylinder, the second clamping piece is located the top of first clamping piece, first die clamping cylinder's telescopic link runs through behind the first clamping piece with the second clamping piece is connected, first die clamping cylinder is used for ordering about the second clamping piece is along vertical removal in order to press from both sides the head in rubber band area.

Optionally, the turnover mechanism comprises a turnover motor and a connecting block, an output shaft of the turnover motor is connected with the first clamping piece through the connecting block, and the turnover motor drives the first clamping piece to rotate through the connecting block and drives the second clamping piece and the head of the elastic band to rotate.

Optionally, the second clamping mechanism includes a third clamping piece, a fourth clamping piece and a second clamping cylinder, the third clamping piece is located above the fourth clamping piece, the second clamping cylinder is located on the third clamping piece and a telescopic rod of the second clamping cylinder runs through the third clamping piece and then is connected with the fourth clamping piece, and the second clamping cylinder is used for driving the fourth clamping piece to vertically move so as to clamp the elastic ring.

Optionally, a fixed block and a moving block are arranged on the third clamping piece, the fixed block and the moving block are arranged at two ends of the third clamping piece, a first blocking piece and a second blocking piece are arranged on the fixed block and the moving block respectively, the elastic band passes through the space between the first blocking piece and the second blocking piece, and the moving block can move on the third clamping piece to adjust the distance between the first blocking piece and the second blocking piece.

Optionally, the ultrasonic cutting device includes an ultrasonic generator, a cutting chopping board, a cutter and a lifting cylinder, the cutter and the cutting chopping board are respectively located above and below the elastic band, the lifting cylinder is connected with the cutter to drive the cutter to vertically move and compress the part to be cut on the cutting chopping board, and the ultrasonic generator is connected with the cutting chopping board to apply ultrasonic vibration to the cutting chopping board.

Optionally, the ultrasonic cutting device further includes a aligning mechanism, the aligning mechanism includes a first aligning block and a second aligning block, the first aligning block and the second aligning block are both disposed at the cut of the elastic band, a slot for the elastic band to pass through is formed between the first aligning block and the second aligning block, and the first aligning block and the second aligning block can move relatively or oppositely to adjust the width of the slot, so that the head of the elastic band is aligned with the to-be-cut portion.

Optionally, the ultrasonic cutting device further comprises an air blowing pipe, and the air blowing pipe is used for blowing air to the head of the elastic band so that the head of the elastic band is attached to the part to be cut of the elastic band.

Optionally, the seamless automatic elastic sewing machine further comprises a sewing device and a fourth driving unit, the fourth driving unit is used for driving the clamping device to move to a sewing position along the Y axis, and the sewing device is used for sewing the part to be sewn.

The utility model provides a seamless automatic elastic band machine, which cuts and fuses an elastic band belt to form an elastic band ring with a required size in an ultrasonic hot melting mode, can effectively solve the problem that the elastic band ring obtained by the existing elastic band belt sewing mode has large butt seam, and can spread the part to be sewn of the elastic band ring and smooth the welding seam of the elastic band ring by driving a first clamping mechanism to move along the X-axis negative direction (the direction of mutual separation) relative to a second clamping mechanism, thereby ensuring the flatness during subsequent sewing and greatly improving the sewing quality.

Drawings

It will be appreciated by those skilled in the art that the drawings are provided for a better understanding of the utility model and do not constitute any limitation to the scope of the utility model. Wherein:

FIG. 1 is a schematic structural diagram of a seamless automatic elastic sewing machine provided by an embodiment of the utility model;

fig. 2-3 are schematic structural views of a gripping device according to an embodiment of the present invention;

FIG. 4 is a partial schematic view of a seamless automatic elastic sewing machine according to an embodiment of the present invention;

fig. 5 is a schematic structural view of an ultrasonic cutting device according to an embodiment of the present invention;

in the drawings:

1-a feeding device; 2-a gripping device; 3-ultrasonic cutter device;

11-upper roller; 12-a lower roll; 13-a feed motor; 14-a metering gear; 21-a first mount; 22-a second mount; 23-a third mount; 24-a fourth mount; 25-a first clamping mechanism; 26-a second clamping mechanism; 27-a turnover mechanism; 31-an ultrasonic generator; 32-cutting the chopping block; 33-a cutter; 34-a lifting cylinder; 35-a first alignment block; 36-a second pair of positive blocks; 37-an air blowing pipe;

251-a first clip; 252-a second clip; 253-a first clamping cylinder; 261-a third clip; 262-a fourth jaw; 263-second clamping cylinder; 264-fixed block; 265-moving block; 271-a turning motor; 272-connecting block.

Detailed Description

To further clarify the objects, advantages and features of the present invention, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is to be noted that the drawings are in greatly simplified form and are not to scale, but are merely intended to facilitate and clarify the explanation of the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this application, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this disclosure, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. As used in this disclosure, the term "plurality" is generally employed in its sense including "at least one" unless the content clearly dictates otherwise. As used in this disclosure, the term "at least two" is generally employed in a sense including "two or more" unless the content clearly dictates otherwise. Furthermore, the terms "first", "third" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "third" may explicitly or implicitly include one or at least two of the features.

FIG. 1 is a schematic structural view of a seamless automatic elastic sewing machine according to an embodiment of the present invention; fig. 2-3 are schematic structural views of a gripping device according to an embodiment of the present invention; FIG. 4 is a partial schematic view of a seamless automatic elastic sewing machine according to an embodiment of the present invention; fig. 5 is a schematic structural diagram of an ultrasonic cutting device according to an embodiment of the present invention.

Referring to fig. 1-3, the present embodiment provides a seamless automatic elastic sewing machine, which includes a feeding device 1, a clamping device 2 and an ultrasonic cutting device 3, wherein:

the feeding device 1 is used for conveying an elastic band;

the clamping device 2 comprises a first installation seat 21, a second installation seat 22, a third installation seat 23, a fourth installation seat 24, a first clamping mechanism 25, a second clamping mechanism 26 and a turnover mechanism 27, wherein the first clamping mechanism 25 and the second clamping mechanism 26 are respectively arranged on the third installation seat 23 and the fourth installation seat 24, the third installation seat 23 and the fourth installation seat 24 are both arranged on the second installation seat 22 and can respectively move along an X axis and a Y axis relative to the second installation seat 22, the second installation seat 22 is arranged on the first installation seat 21 and can move along the X axis relative to the first installation seat 21, when the third installation seat 23 moves along the X axis positive direction relative to the second installation seat 22, the first clamping mechanism 25 is driven to move and clamp the head of the elastic band, the turnover mechanism 27 is connected with the first clamping mechanism 25 and is used for driving the first clamping mechanism 25 to rotate, so that the head part is attached to a part to be cut of the elastic band after being turned for 180 degrees, and the X axis is perpendicular to the Y axis;

the ultrasonic cutter device 3 is used for cutting the part to be cut in a hot melting mode, and the head part and the part to be cut are welded together to form an elastic ring;

when the fourth installation base 24 moves along the positive direction of the Y axis relative to the second installation base 22, the second clamping mechanism 26 is driven to move so as to simultaneously clamp the elastic ring with the first clamping mechanism 25, and when the third installation base 23 moves along the negative direction of the X axis relative to the second installation base 22, the first clamping mechanism 25 is driven to move along the negative direction of the X axis relative to the second clamping mechanism 26 so as to spread the part to be sewn of the elastic ring.

The seamless automatic elastic sewing machine provided by the embodiment is right through the hot melting mode, the elastic band is cut and welded to form an elastic ring with required size, the problem that the elastic ring obtained by adopting the existing elastic band sewing mode is large in butt joint can be effectively solved, and meanwhile, through driving about the first clamping mechanism 25 is relative, the second clamping mechanism 26 moves along the X-axis negative direction (the direction of mutual keeping away from), can be used for spreading out the part to be sewn of the elastic ring and flattening the welding line of the elastic ring, ensuring the flatness of the subsequent sewing, and greatly improving the sewing quality.

Specifically, referring to fig. 4, the feeding device 1 includes an upper roller 11, a lower roller 12 and a feeding motor 13, the lower roller 12 is connected to the feeding motor 13 through a synchronous belt, the upper roller 11 and the lower roller 12 are oppositely disposed up and down and are adapted to each other, the upper roller 11 is movably connected to rub against the elastic band through gravity and elasticity, and when the lower roller 12 is driven to operate by the feeding motor 13, the upper roller 12 and the lower roller 12 are matched with each other and drive the elastic band to move.

Preferably, the feeding device 1 is provided with a metering gear 14, the metering gear 14 is positioned above the rubber band and is in contact with the rubber band, the rubber band can drive the metering gear 14 to rotate when moving, the metering gear 14 is provided with an encoder, and the encoder can output the conveying length of the rubber band according to the number of rotating turns of the metering gear 14 so as to obtain the rubber ring with the required size.

Referring to fig. 2 to 3, the gripping device 2 includes a first mounting base 21, a second mounting base 22, a third mounting base 23, a fourth mounting base 24, a first clamping mechanism 25, a second clamping mechanism 26 and a turnover mechanism 27, the first clamping mechanism 25 and the second clamping mechanism 26 are respectively disposed on the third mounting base 23 and the fourth mounting base 24, the third mounting base 23 and the fourth mounting base 24 are both disposed on the second mounting base 22 and can respectively move along an X axis and a Y axis relative to the second mounting base 22, and the second mounting base 22 is disposed on the first mounting base 21 and can move along the X axis relative to the first mounting base 21. When the third installation base 23 moves along the X axis relative to the second installation base 22, the first clamping mechanism 25 is driven to move synchronously, when the fourth installation base 24 moves along the Y axis relative to the second installation base 22, the second clamping mechanism 26 is driven to move synchronously, when the second installation base 22 moves along the X axis relative to the first installation base 21, the first clamping mechanism 25 and the second clamping mechanism 26 are driven to move synchronously,

in this embodiment, X axle and Y axle are two mutually perpendicular's directions that are on a parallel with the horizontal plane, wherein, the X axle is on a parallel with the direction of delivery in rubber band area, X axle positive direction is towards being close to material feeding unit 1's direction, X axle negative direction is towards keeping away from material feeding unit 1's direction, Y axle perpendicular to the direction of delivery in rubber band area, Y axle positive direction is towards being close to make up the direction of device (outwards stretching out), Y axle negative direction is towards keeping away from make up the direction of device (inwards withdraw).

In this embodiment, when the third mounting base 23 is driven to move in the positive direction of the X axis relative to the second mounting base 22, the first clamping mechanism 25 moves in the positive direction of the X axis, that is, moves in a direction close to the feeding device 1 so as to clamp the head of the elastic band; when the fourth mounting seat 24 moves in the positive Y-axis direction relative to the second mounting seat 22, the second clamping mechanism 26 moves in the positive Y-axis direction to simultaneously clamp the elastic ring together with the first clamping mechanism 25. That is, the first clamping mechanism 25 is always in an extended state, and the second clamping mechanism 26 is in a retracted state in an initial state, and when the ultrasonic cutter device 3 cuts the elastic ribbon, the elastic ribbon extends out to clamp the elastic ribbon together with the first clamping mechanism 25.

Further, the clamping device 2 further includes a first driving unit, a second driving unit and a third driving unit, the first driving unit is installed on the first installation base 21 and is used for driving the second installation base 22 to move along the X axis relative to the first installation base 21, and the second driving unit and the third driving unit are both installed on the second installation base 22 and are used for respectively driving the third installation base 23 and the fourth installation base 24 to move along the X axis and the Y axis relative to the second installation base 22.

In this embodiment, the first driving unit and the third driving unit are both air cylinders, the second driving unit includes a driving motor and a transmission belt, the driving motor drives the third mounting seat 23 to move along the X axis through the transmission belt, of course, other driving manners are also within the protection scope of the present application, and the present application is not limited thereto.

With reference to fig. 2 to fig. 3, the first clamping mechanism 25 includes a first clamping piece 251, a second clamping piece 252 and a first clamping cylinder 253, the second clamping piece 252 is located above the first clamping piece 251, a telescopic rod of the first clamping cylinder 253 penetrates through the first clamping piece 251 and then is connected to the second clamping piece 252, and the first clamping cylinder 253 is used for driving the second clamping piece 252 to move vertically so as to clamp the head of the elastic band. In this embodiment, the first clamping piece 251 is provided with a through hole, and the telescopic rod of the first clamping cylinder 253 penetrates through the through hole and is connected with the second clamping piece 252.

For example, when the telescopic rod of the first clamping cylinder 253 extends, the second clamping piece 252 is driven to move upwards, at this time, the distance between the first clamping piece 251 and the second clamping piece 252 will increase, when the first clamping mechanism 25 is driven to move towards the direction close to the ultrasonic cutting device 3, the first clamping piece 251 and the second clamping piece 252 are respectively located above and below the head of the elastic band, and then the telescopic rod of the first clamping cylinder 253 retracts, at this time, the second clamping piece 252 moves downwards, so that the distance between the first clamping piece 251 and the second clamping piece 252 decreases, thereby clamping the head of the elastic band.

With reference to fig. 2 and fig. 3, the turnover mechanism 27 includes a turnover motor 271 and a connecting block 272, an output shaft of the turnover motor 271 is connected to the first clamping piece 251 through the connecting block 272, the turnover motor 271 drives the first clamping piece 251 to rotate through the connecting block 272, and drives the second clamping piece 252 and the head of the elastic band to rotate, so that the head is attached to the to-be-cut portion of the elastic band after being turned 180 degrees, and the shape of the elastic band is enclosed. In this embodiment, the turning motor 271 is disposed on the third mounting base 23, and when the turning motor 271 is driven to operate, the connecting block 272 is driven to rotate, so as to drive the first clamping mechanism 25 to rotate.

With reference to fig. 2 and fig. 3, the second clamping mechanism 26 includes a third clamping piece 261, a fourth clamping piece 262 and a second clamping cylinder 263, the third clamping piece 261 is located above the fourth clamping piece 262, the second clamping cylinder 263 is located on the third clamping piece 261, and a telescopic rod of the second clamping cylinder 263 penetrates through the third clamping piece 261 and is connected to the fourth clamping piece 262, and the second clamping cylinder 263 is used for driving the fourth clamping piece 262 to move vertically to clamp the elastic band. After the second clamping mechanism 26 and the first clamping mechanism 25 clamp different parts of the elastic ring at the same time, the third installation base 23 is driven to move along the X-axis negative direction relative to the second installation base 22, so that the first clamping mechanism 25 can move along the X-axis negative direction relative to the second clamping mechanism 26, and the part to be sewn of the elastic ring is spread. Meanwhile, as the welding seam of the elastic ring is arranged on one side of the first clamping mechanism 25 close to the second clamping mechanism 26, when the first clamping mechanism 25 moves along the negative direction of the X axis relative to the second clamping mechanism 26, the welding seam is driven to pass through the gap between the third clamping piece 261 and the fourth clamping piece 262 and be smoothed, so that the flatness of subsequent sewing is improved.

Referring to fig. 3, the third clamping piece 261 is provided with a fixing block 264 and a moving block 265, the fixing block 264 and the moving block 265 are disposed at two ends of the third clamping piece 261 in an opposite manner, the fixing block 264 and the moving block 265 are respectively provided with a first blocking piece and a second blocking piece, the elastic band passes through the first blocking piece and the second blocking piece, and the moving block 265 can move on the third clamping piece 261 to adjust a distance between the first blocking piece and the second blocking piece. Because different elastic band products have different widths, the distance between the first baffle plate and the second baffle plate needs to be properly adjusted according to the width of the elastic band so as to better limit the elastic band.

In this embodiment, the fixing block 264 and the moving block 265 are fixed to the distal end and the proximal end of the third clamping piece 261 by fasteners such as bolts, respectively. The third clamping piece 261 is provided with a waist-shaped long hole, and the position of the moving block 265 on the third clamping piece 261 can be adjusted conveniently by changing the position of the fastener in the waist-shaped long hole. Of course, the position of the moving block 265 on the third clamping piece 261 may be adjusted in other ways besides the long kidney-shaped hole, for example, a plurality of mounting holes are formed at equal intervals along the length direction of the third clamping piece 261, and the position of the moving block 265 may also be adjusted by connecting the moving block 265 to mounting holes at different positions.

In this embodiment, the fixing block 264 may be fixed to the distal end of the third clamping piece 261 by one bolt, and the moving block 265 may be fixed to the proximal end of the third clamping piece 261 by two or more bolts, so as to ensure the installation stability of the moving block 265.

Referring to fig. 1 in combination with fig. 4 to 5, the ultrasonic cutting device 3 includes an ultrasonic generator 31, a cutting anvil 32, a cutter 33 and a lifting cylinder 34, the cutter 33 and the cutting anvil 32 are respectively located above and below the elastic band, the lifting cylinder 34 is connected to the cutter 33 to drive the cutter 33 to move vertically and press the elastic band against the cutting anvil 32, and the ultrasonic generator 31 is connected to the cutting anvil 32 to apply ultrasonic vibration to the cutting anvil 32.

Ultrasonic cutting is to use the energy of ultrasonic wave to heat and melt the local part of the material to be cut, thereby achieving the purpose of cutting the material. When the cutting block type ultrasonic cutting knife device 3 adopted in the embodiment needs to cut the elastic band, the lifting cylinder 34 drives the cutting knife 33 to descend and press the elastic band on the cutting block 32, and then the ultrasonic generator 31 loads ultrasonic vibration on the cutting block 32, so that the elastic band is instantly softened and melted under the action of ultrasonic energy, the strength is greatly reduced, and the purpose of cutting materials can be achieved by applying small force. Moreover, when the elastic band is melted, the head part of the elastic band and the part to be cut are welded together under the action of the ultrasonic energy to form an elastic ring, so that the head end and the tail end of the elastic band do not need to be respectively spliced through two clamping mechanisms in the prior art, the problem of large seam is avoided, and the sewing quality is effectively guaranteed.

Referring to fig. 5, the ultrasonic cutting device 3 further includes an aligning mechanism, the aligning mechanism includes a first aligning block 35 and a second aligning block 36, the first aligning block 35 and the second aligning block 36 are both disposed at the cut of the elastic band, a slot for the elastic band to pass through is formed between the first aligning block 35 and the second aligning block 36, and the first aligning block 35 and the second aligning block 36 can move relatively or away from each other to adjust the width of the slot, so that the head of the elastic band is aligned with the portion to be cut. The aligning mechanism is mainly used for aligning the head of the elastic band with the part to be cut before the elastic band is cut, so that the problem that the head of the elastic band is staggered with the part to be cut is solved.

Furthermore, a waist-shaped long hole is formed in the second alignment block 36, the extending amount of the second alignment block 36 can be adjusted by changing the position of a fastener in the waist-shaped long hole, and the width of the clamping groove can be adjusted, so that the elastic band clamp can adapt to elastic bands with different widths. For example, when the amount of extension of the second pair of alignment blocks 36 is increased (rightward shift in fig. 4), the slot between the first pair of alignment blocks 35 and the second pair of alignment blocks 36 becomes larger, and when the amount of extension of the second pair of alignment blocks 36 is increased (leftward shift in fig. 4), the slot between the first pair of alignment blocks 35 and the second pair of alignment blocks 36 becomes smaller.

Further, the ultrasonic cutter device 3 further comprises an air blowing pipe 37, wherein the air blowing pipe 37 is used for blowing air to the head of the elastic band before cutting so that the head of the elastic band is attached to the part to be cut of the elastic band, and the welding quality of the elastic band is guaranteed.

In this embodiment, the seamless automatic elastic sewing machine further includes a sewing device (not shown in the figure) and a fourth driving unit, the fourth driving unit is configured to drive the whole clamping device 2 to move to a sewing position along the Y axis, the sewing device is configured to sew the portion to be sewn, and the sewing device is, for example, a sewing machine. In this embodiment, the fourth driving unit is an air cylinder, and of course, other driving manners are within the protection scope of the present application, and the present application is not limited thereto.

Based on this, this embodiment still provides a sewing method, adopts as above seamless automatic rubber band machine to make up the rubber band, includes following step:

s1, driving the feeding device 1 to convey the elastic band, and driving the second mounting seat 22 to move to a first preset position relative to the first mounting seat 21 along the positive direction of the X axis;

s2, driving the third mounting base 23 to move along the positive direction of the X axis relative to the second mounting base 22 and driving the first clamping mechanism 25 to move to a second preset position so as to clamp the head of the elastic band;

s3, driving the third mounting base 23 to move along the negative X-axis direction relative to the second mounting base 22 and driving the first clamping mechanism 25 to move to a third preset position;

s4, driving the first clamping mechanism 25 to rotate through the turnover mechanism 27, so that the head is attached to the to-be-cut part of the elastic band after being turned over for 180 degrees;

s5, cutting the part to be cut through the ultrasonic cutter device 3, and welding the head part and the part to be cut together to form an elastic ring;

s6, driving the second mounting base 22 to move to a fourth preset position along the X-axis negative direction relative to the first mounting base 21;

s7, driving the fourth mounting base 24 to move along the positive direction of the Y axis relative to the second mounting base 22 and driving the second clamping mechanism 26 to move so as to clamp the elastic ring together with the first clamping mechanism 25;

and S8, driving the third mounting base 23 to move along the X-axis negative direction relative to the second mounting base 22, and driving the first clamping mechanism 25 to move along the X-axis negative direction relative to the second clamping mechanism 26 so as to spread the part to be sewn of the elastic ring.

Firstly, step S1 is executed, the feeding device 1 is driven to convey the elastic band, the front end of the elastic band passes through the ultrasonic cutter device 3 gradually under the cooperation of the upper and lower rollers 12, the redundant part of the head of the elastic band can be cut off by the ultrasonic cutter device 3 before the second mounting seat 22 is driven to move to the first preset position along the positive direction of the X axis relative to the first mounting seat 21, so as to ensure the output size of the elastic band, and then the second mounting seat 22 is driven to move to the first preset position along the positive direction of the X axis relative to the first mounting seat 21. In this embodiment, the first driving unit drives the second mounting seat 22 to move along the positive direction of the X axis relative to the first mounting seat 21.

Then, step S2 is executed, the second driving unit drives the third mounting base 23 to move along the positive direction of the X axis relative to the second mounting base 22 and drives the first clamping mechanism 25 to move to a second preset position, which is equivalent to making the first clamping mechanism 25 approach the feeding device 1, so as to clamp the head of the elastic band. When the first clamping mechanism 25 moves to the second preset position, the elastic band is located between the first clamping piece 251 and the second clamping piece 252 of the first clamping mechanism 25, and at this time, the head of the elastic band can be clamped by driving the second clamping piece 252 to move vertically through the first clamping cylinder 253.

Step S3 is executed, in which the second driving unit drives the third mounting base 23 to move along the negative X-axis direction relative to the second mounting base 22 and drives the first clamping mechanism 25 to move to a third preset position, so as to continuously output the elastic band.

The length of the elastic band can be obtained by an encoder on the metering gear 14 as the elastic band is conveyed, and when the length of the elastic band is proper, step S4 is executed, the first clamping mechanism 25 is driven to rotate by the turnover mechanism 27, so that the head of the elastic band is turned 180 degrees and then attached to the to-be-cut part of the elastic band, and the shape of the elastic band is enclosed.

After the step S4 is completed, before the step S5 is performed, the sewing method further includes:

blowing air to the head of the elastic band through an air blowing pipe 37 so that the head of the elastic band is attached to a part to be cut of the elastic band, and ensuring the subsequent welding quality of the elastic band;

the head of the elastic band is aligned with the part to be cut through the aligning mechanism, so that the problem of dislocation between the head of the elastic band and the part to be cut is prevented.

Then, step S5 is executed, the to-be-cut part is cut by the ultrasonic cutter device 3, and the head part and the to-be-cut part are welded together to form an elastic ring. Specifically, the cutting knife 33 is driven to move vertically by the lifting cylinder 34 and presses the elastic band against the cutting anvil 32, and then the ultrasonic generator 31 is connected with the cutting anvil 32 to apply ultrasonic vibration to the cutting anvil 32, so that the elastic band is instantly softened and melted under the action of ultrasonic energy, and the head of the elastic band and the part to be cut are welded together under the action of the ultrasonic energy to form an elastic band, thereby avoiding the problem of large seam and effectively ensuring the sewing quality.

After the cutting, step S6 is executed to drive the second mounting base 22 to move to a fourth preset position along the negative X-axis direction relative to the first mounting base 21. In this embodiment, the first driving unit drives the second mounting base 22 to move along the negative X-axis direction relative to the first mounting base 21, and at this time, the first clamping mechanism 25 moves along the positive X-axis direction relative to the second mounting base 22 and approaches the second clamping mechanism 26.

Then, step S7 is executed, the fourth mounting base 24 is driven to move in the positive Y-axis direction relative to the second mounting base 22, and the second clamping mechanism 26 is driven to move so as to clamp the elastic ribbon together with the first clamping mechanism 25. In this embodiment, the third driving unit drives the fourth mounting base 24 to move along the positive direction of the Y axis relative to the second mounting base 22, and further drives the second clamping mechanism 26 to move along the positive direction of the Y axis to clamp the elastic ring together with the first clamping mechanism 25.

After the second clamping mechanism 26 and the first clamping mechanism 25 simultaneously clamp different parts of the elastic band, step S8 is executed, the second driving unit drives the third mounting base 23 to move along the negative X-axis direction relative to the second mounting base 22, and drives the first clamping mechanism 25 to move along the negative X-axis direction relative to the second clamping mechanism 26, so as to spread the part of the elastic band to be sewn. Meanwhile, as the welding seam of the elastic ring is arranged on one side of the first clamping mechanism 25 close to the second clamping mechanism 26, when the first clamping mechanism 25 moves along the negative direction of the X axis relative to the second clamping mechanism 26, the welding seam is driven to pass through the gap between the third clamping piece 261 and the fourth clamping piece 262 and be smoothed, so that the flatness of subsequent sewing is improved.

After the portion to be sewn of the elastic band is spread, the sewing method further includes:

the fourth driving unit drives the whole clamping device 2 to move to a sewing position along the positive direction of the Y axis, and the sewing device is started to sew the part to be sewn so as to finish sewing of the elastic band ring.

In summary, the embodiment of the utility model provides a seamless automatic elastic sewing machine, which cuts and welds an elastic band in an ultrasonic hot melting mode to form an elastic ring with a required size, can effectively solve the problem that the elastic ring obtained by adopting the existing elastic band sewing mode has large butt seam, and can spread the part to be sewn of the elastic ring and smooth the welding seam of the elastic ring by driving the first clamping mechanism to move along the X-axis negative direction (the direction away from each other) relative to the second clamping mechanism, thereby ensuring the flatness during subsequent sewing and greatly improving the sewing quality.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. The utility model provides a seamless automatic rubber band machine which characterized in that includes material feeding unit, presss from both sides and gets device and ultrasonic wave cutters, wherein:

the feeding device is used for conveying the elastic band;

the clamping device comprises a first installation seat, a second installation seat, a third installation seat, a fourth installation seat, a first clamping mechanism, a second clamping mechanism and a turnover mechanism, wherein the first clamping mechanism and the second clamping mechanism are respectively arranged on the third installation seat and the fourth installation seat, the third installation seat and the fourth installation seat are respectively arranged on the second installation seat and can respectively move along an X axis and a Y axis relative to the second installation seat, the second installation seat is arranged on the first installation seat and can move along the X axis relative to the first installation seat, when the third installation seat moves along the X axis positive direction relative to the second installation seat, the first clamping mechanism is driven to move and clamp the head part of the rubber band, the turnover mechanism is connected with the first clamping mechanism and is used for driving the first clamping mechanism to rotate, so that the head of the elastic band is turned by 180 degrees and then is attached to the part to be cut of the elastic band, and the X axis is perpendicular to the Y axis;

the ultrasonic cutter device is used for cutting the part to be cut in a hot melting mode and welding the head of the elastic band with the part to be cut together to form an elastic ring;

when the fourth installation seat is relative the second installation seat moves along the positive direction of the Y axis, the second clamping mechanism is driven to move so as to simultaneously clamp the elastic ring with the first clamping mechanism, and when the third installation seat is relative the second installation seat moves along the negative direction of the X axis, the first clamping mechanism is driven to move relative to the second clamping mechanism along the negative direction of the X axis so as to spread the part to be sewn of the elastic ring.

2. The seamless automatic elastic sewing machine according to claim 1, wherein the clamping device further comprises a first driving unit, a second driving unit and a third driving unit, the first driving unit is mounted on the first mounting base and is used for driving the second mounting base to move along the X-axis relative to the first mounting base, and the second driving unit and the third driving unit are both mounted on the second mounting base and are used for driving the third mounting base and the fourth mounting base to move along the X-axis and the Y-axis relative to the second mounting base, respectively.

3. The seamless automatic elastic sewing machine according to claim 1, wherein the first clamping mechanism comprises a first clamping piece, a second clamping piece and a first clamping cylinder, the second clamping piece is located above the first clamping piece, a telescopic rod of the first clamping cylinder penetrates through the first clamping piece and then is connected with the second clamping piece, and the first clamping cylinder is used for driving the second clamping piece to move vertically so as to clamp the head of the elastic sewing belt.

4. The seamless automatic elastic sewing machine according to claim 3, wherein the turnover mechanism comprises a turnover motor and a connecting block, an output shaft of the turnover motor is connected with the first clamping piece through the connecting block, and the turnover motor drives the first clamping piece to rotate through the connecting block and drives the second clamping piece and the head of the elastic band to rotate.

5. The seamless automatic elastic sewing machine according to claim 1, wherein the second clamping mechanism comprises a third clamping piece, a fourth clamping piece and a second clamping cylinder, the third clamping piece is located above the fourth clamping piece, the second clamping cylinder is located on the third clamping piece, a telescopic rod of the second clamping cylinder penetrates through the third clamping piece and then is connected with the fourth clamping piece, and the second clamping cylinder is used for driving the fourth clamping piece to move vertically so as to clamp the elastic ring.

6. The seamless automatic elastic sewing machine according to claim 5, wherein a fixed block and a moving block are arranged on the third clamping piece, the fixed block and the moving block are arranged at two ends of the third clamping piece opposite to each other, a first blocking piece and a second blocking piece are respectively arranged on the fixed block and the moving block, the elastic belt passes through the space between the first blocking piece and the second blocking piece, and the moving block can move on the third clamping piece to adjust the space between the first blocking piece and the second blocking piece.

7. The seamless automatic elastic sewing machine according to claim 1, wherein the ultrasonic cutter device comprises an ultrasonic generator, a cutting anvil, a cutter and a lifting cylinder, the cutter and the cutting anvil are respectively located above and below the elastic band, the lifting cylinder is connected with the cutter to drive the cutter to move vertically and press the portion to be cut against the cutting anvil, and the ultrasonic generator is connected with the cutting anvil to apply ultrasonic vibration to the cutting anvil.

8. The seamless automatic elastic sewing machine according to claim 1, wherein the ultrasonic cutter device further comprises an alignment mechanism, the alignment mechanism comprises a first alignment block and a second alignment block, the first alignment block and the second alignment block are both arranged at the cut of the elastic tape, a slot for the elastic tape to pass through is formed between the first alignment block and the second alignment block, and the first alignment block and the second alignment block can move relatively or oppositely to adjust the width of the slot, so that the head of the elastic tape is aligned with the to-be-cut part.

9. The seamless automatic elastic sewing machine according to claim 1, wherein the ultrasonic cutter device further comprises a blowing pipe, and the blowing pipe is used for blowing air to the head of the elastic band so as to enable the head of the elastic band to be attached to the part to be cut of the elastic band.

10. The seamless automatic elastic sewing machine according to claim 1, further comprising a sewing device and a fourth driving unit, wherein the fourth driving unit is configured to drive the gripping device to move to a sewing position along the Y axis, and the sewing device is configured to sew the portion to be sewn.

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