CN217916853U - Elastic sewing machine - Google Patents

Abstract

The utility model provides a rubber band machine, include: the feeding device is used for conveying the elastic band; the recovery device is used for fixing the front end of the elastic band in the process of conveying the elastic band by the feeding device so as to enable the elastic band to form an elastic ring with gradually increased size in the conveying process; the ultrasonic cutter device is used for cutting the elastic ring in a hot melting mode to form an elastic ring; the clamping device is used for clamping the rubber ring when the rubber ring is cut and moving the cut rubber ring to a position to be sewn; the recovery device is also used for recovering an elastic band with a preset length every time the ultrasonic cutter device cuts, so that the next cutting position of the ultrasonic cutter device avoids the previous cutting position. 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, and the structure of the elastic band machine and the sewing process of the elastic band are simplified.

Description

Elastic sewing machine

Technical Field

The utility model relates to a sewing technical field especially relates to a rubber band machine.

Background

The existing elastic sewing machine sews the elastic band as follows:

1) The elastic band is pulled by the material 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, complex action and the like, and the sewing efficiency is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an elastic sewing machine has solved the elastic ring that adopts current elastic band sewing mode to obtain and has had the big problem of butt joint, has simplified and has made up the structure and make up the technology.

In order to achieve the above object, the utility model provides an elastic sewing machine, include:

the feeding device is used for conveying the elastic band;

the recovery device is used for fixing the front end of the elastic band in the process of conveying the elastic band by the feeding device so as to enable the elastic band to form an elastic ring with gradually increased size in the conveying process;

the ultrasonic cutter device is used for cutting the rubber ring in a hot melting mode to form a rubber ring;

the clamping device is used for clamping the rubber ring when the rubber ring is cut and moving the cut rubber ring to a position to be sewn;

the recovery device is also used for recovering an elastic band with a preset length every time the ultrasonic cutter device cuts, so that the next cutting position of the ultrasonic cutter device avoids the previous cutting position.

Optionally, the recovery device comprises a first roller and a second roller which are matched with each other, and the front end of the elastic band is clamped between the first roller and the second roller;

and when the ultrasonic cutter device cuts once, the first roller rotates for a preset angle and drives the front end of the elastic band to move for the preset length.

Optionally, the recovery unit still includes step motor, swing piece and extension spring, step motor installs in the frame of rubber band machine and with first running roller is connected, the rotatable installation of one end of swing piece is in the frame, the other end with the tip of second running roller rotates to be connected, swing piece is relative can drive when the frame rotates the second running roller is relative first running roller swing, the one end of extension spring with the frame is connected, the other end with swing piece is connected, the extension spring be used for to second running roller applys a precompression, so that first running roller with the second running roller presss from both sides tightly the front end of rubber band.

Optionally, the recycling device further comprises a first steering rod, the front end of the elastic band extends to a position between the first roller and the second roller through the first steering rod, and the first steering rod is used for guiding the front end of the elastic band.

Optionally, a first limiting block and a second limiting block are sleeved on the first steering rod, the rubber band passes through the space between the first limiting block and the second limiting block, and the first limiting block and/or the second limiting block can move on the first steering rod.

Optionally, the recovery device further comprises a second steering rod arranged in parallel with the first steering rod, and the second steering rod is closer to the ultrasonic cutter device relative to the first steering rod.

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 press the elastic band on the cutting chopping board, and the ultrasonic generator is connected with the cutting chopping board to load ultrasonic vibration on the cutting chopping board.

Optionally, the ultrasonic cutting device further comprises a aligning mechanism, the aligning mechanism comprises a first aligning block and a second aligning block, the first aligning block and the second aligning block are both arranged at the cut of the elastic band, a clamping groove 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 move oppositely to adjust the width of the clamping groove.

Optionally, the clamping device includes a first mounting seat, a second mounting seat, a third mounting seat, a fourth mounting seat, a first clamping mechanism and a second clamping mechanism, the first mounting seat is disposed on the fourth mounting seat and can be opposite to the fourth mounting seat, the second mounting seat is disposed on the third mounting seat and can be opposite to the third mounting seat, the third mounting seat is disposed on the fourth mounting seat and can be opposite to the fourth mounting seat along the X axis, the fourth mounting seat can be opposite to the X axis along the X axis, the first clamping mechanism and the second clamping mechanism are disposed on the first mounting seat and the second mounting seat respectively and are used for clamping different parts of the elastic ring respectively.

Optionally, the first clamping mechanism includes a first clamping piece, a second clamping piece and a first clamping cylinder, the first clamping piece is mounted on the first mounting seat, the second clamping piece is located above the first clamping piece, the first clamping cylinder is mounted on the second clamping piece, and the telescopic rod penetrates through the second clamping piece and then is connected with the first clamping piece, and the first clamping cylinder is used for driving the second clamping piece to move vertically so as to clamp the elastic band with the first clamping piece;

the second clamping mechanism comprises a third clamping piece, a fourth clamping piece and a second clamping cylinder, the third clamping piece is installed on the second mounting seat, the fourth clamping piece is located above the third clamping piece, the second clamping cylinder is installed on the fourth clamping piece, a telescopic rod penetrates through the fourth clamping piece, the fourth clamping piece is connected with the third clamping piece, and the second clamping cylinder is used for driving the fourth clamping piece to move vertically so as to clamp the elastic band with the third clamping piece.

Optionally, the elastic sewing machine further comprises a sewing device, and the sewing device is used for sewing the elastic ring at the position to be sewn.

The utility model provides a rubber band machine has one of following beneficial effect at least:

1) The elastic band is cut and welded in an ultrasonic hot melting mode to form an elastic ring with the required size, so that the problem that the size of the elastic ring obtained by adopting the existing elastic band sewing mode is large in butt joint can be effectively solved;

2) By driving the first clamping mechanism to move relative to the second clamping mechanism, the part to be sewn of the rubber ring can be spread out and the welded joints of the rubber ring can be smoothed, the flatness during subsequent sewing is ensured, and the sewing quality is greatly improved.

3) The recovery device is also used for recovering an elastic band with a preset length every time the ultrasonic cutting device cuts, so that the next cutting position of the ultrasonic cutting device avoids the previous cutting position, and the elastic band is prevented from being cut off;

4) The front end of the elastic band is fixed through the recovery device, so that the elastic band is surrounded into an elastic ring with gradually increased size in the conveying process, the elastic band does not need to be turned over, and the structure of the elastic band machine and the sewing process of the elastic band ring are simplified. And in addition, a complete waste material belt is formed in the sewing process of the elastic ring, so that the recovery is convenient.

Drawings

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

fig. 1 is a schematic structural view of an elastic sewing machine according to an embodiment of the present invention;

fig. 2 is a schematic cutting view of an elastic sewing machine according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a feeding device according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a recycling apparatus according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a first steering rod and a second steering rod provided in the embodiment of the present invention;

fig. 6 is a schematic structural view of an ultrasonic cutting device according to an embodiment of the present invention;

fig. 7 to fig. 8 are schematic structural views of a gripping device according to an embodiment of the present invention;

in the drawings:

1-a feeding device; 2-elastic band; 3-a recovery unit; 4-ultrasonic cutter device; 5-a gripping device; 6-welding points;

11-an upper roller; 12-a lower roll; 13-a feeding motor; 14-a metering gear; 31-a first roller; 32-a second roller; 33-a stepper motor; 34-a swinging member; 35-a spring; 36-a first steering column; 37-a first stopper; 38-a second stopper; 39-a second steering rod; 41-an ultrasonic generator; 42-cutting the chopping block; 43-a cutter; 44-a lifting cylinder; 45-first alignment block; 46-a second alignment block;

51-a first mount; 52-a second mount; 53-third mount; 54-a fourth mount;

511-a first cylinder; 512-a first guide rail; 521-a second cylinder; 522-a second guide rail; 531-step motor; 532-a belt; 551-first clip; 552-a second clip; 553-a first clamping cylinder; 561-a third clip; 562-a fourth clip; 563-second gripper cylinder.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming 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 the present application, the term "plurality" is generally used in a sense including "at least one" unless the content clearly dictates otherwise. As used in the present disclosure, the term "at least two" is generally used 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, a feature defined as "first", "third", or "third" may explicitly or implicitly include one or at least two of the feature.

Referring to fig. 1-2, fig. 1 is a schematic structural view of a rubber band machine according to an embodiment of the present invention, and fig. 2 is a schematic cutting view of the rubber band machine according to an embodiment of the present invention. The embodiment provides an elastic sewing machine, comprising:

the feeding device 1 is used for conveying an elastic band 2;

the recovery device 3 is used for fixing the front end of the elastic band 2 in the process that the feeding device 1 conveys the elastic band 2 so as to enable the elastic band 2 to form an elastic ring with gradually increased size in the conveying process;

the ultrasonic cutter device 4 is used for cutting the rubber ring in a hot melting mode to form a rubber ring;

the clamping device 5 is used for clamping the rubber ring when the rubber ring is cut and moving the cut rubber ring to a position to be sewn;

the recovery device 3 is further configured to recover the elastic band 2 with a predetermined length every time the ultrasonic cutting device 4 cuts, so that the next cutting position of the ultrasonic cutting device avoids the previous cutting position.

Because the front end of the elastic band 2 is fixed on the recovery device 3, which is equivalent to the fixation of one end of the elastic band 2, the conveyed part of the elastic band 2 is surrounded into an elastic ring with gradually increased size along with the continuous conveying of the elastic band 2 by the feeding device 1. It should be understood that the "rubber ring" is not strictly annular, and a ring having an opening is provided, and when the elastic band 2 is conveyed to a preset length, the ultrasonic cutter device 4 acts to cut and fuse the rubber ring by means of hot melting to form an elastic ring with a required size, and the opening of the rubber ring is fused to form a whole ring (i.e. an elastic ring). The mode through the cutting has directly formed the elastic ring, and the mode that utilizes clamping mechanism to overturn relatively traditional elastic machine has greatly simplified in the action, and has adopted the mode of hot melt to effectively solve the elastic ring that adopts current elastic band 2 mode of sewing up to obtain and has had the big problem of butt joint.

Furthermore, it should be understood that the "front end" of the elastic band 2 referred to in the present application is a portion that has been output by the feeding device 1, as opposed to the "rear end" of the rubber band, which is a portion that needs to be output gradually by the feeding device 1. In addition, use three elastic ring of adjacent formation as the example, the rear end of first elastic ring can be in the same place with the front end butt fusion of second elastic ring, and along with the continuous transport of elastic band 2 this moment, the rear end of first elastic ring is equivalent to the front end of second elastic ring, the rear end of second elastic ring can be in the same place with the front end butt fusion of third elastic ring, the rear end of second elastic ring is equivalent to the front end of third elastic ring. Each small black dot in fig. 2 corresponds to one fusion point 6.

In this embodiment, each time the ultrasonic cutting device 4 cuts, the recovery device 3 is further configured to recover an elastic band 2 with a predetermined length, so that a next cutting position of the ultrasonic cutting device 4 avoids a previous cutting position. This is because if the leading end of the elastic band 2 does not move, the weld 6 of the previous elastic band becomes the weld 6 of the next elastic band, and the elastic band 2 is easily cut after a plurality of cuts, resulting in failure to form an elastic band. Therefore, a new elastic band ring is formed when the ultrasonic cutter device 4 cuts once, the excessive part at the front end of the elastic band 2 becomes a waste band (leftover materials can be generated when the elastic band ring is manufactured, and the leftover materials are sequentially connected end to form the waste band), the waste band is recovered through the recovery device 3, and it can be understood that the feeding device 1 conveys the elastic band 2 with the preset length when the ultrasonic cutter device 4 cuts once, and the recovery device 3 simultaneously recovers the elastic band 2 with the preset length so as to avoid the welding point 6 of the previous elastic band ring.

Specifically, please refer to fig. 3, fig. 3 is a schematic structural diagram of a feeding device according to an embodiment of the present invention. The feeding device 1 comprises an upper roller 11, a lower roller 12 and a feeding motor 13, wherein the lower roller 12 is connected with the feeding motor 13 through a synchronous belt, the upper roller 11 is arranged up and down relative to the lower roller 12 and mutually adaptive to the lower roller, the upper roller 11 is movably connected with the elastic band 2 through gravity and elasticity, and when the feeding motor 13 drives the lower roller 12 to run, the upper roller 12 and the lower roller 12 are mutually matched and drive the elastic band 2 to move.

Preferably, the feeding device 1 is provided with a metering gear 14, the metering gear 14 is located above the elastic band 2 and is in contact with the elastic band 2, the elastic band 2 drives 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 elastic band 2 according to the number of rotating turns of the metering gear 14, so as to obtain the elastic band with the required size.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a recycling device according to an embodiment of the present invention. The recovery device 3 comprises a first roller 31 and a second roller 32 which are matched with each other, and the front end of the elastic band 2 is clamped between the first roller 31 and the second roller 32, so that the elastic band 2 is surrounded into an elastic ring with gradually increased size in the conveying process;

wherein, every time the ultrasonic cutter device 4 cuts, the lower roller 12 of the feeding device 1 and the first roller 31 rotate a predetermined angle, and drive the front end of the elastic band 2 to move the predetermined length.

In this embodiment, recovery unit 3 still includes step motor 33, swinging member 34 and extension spring 35, step motor 33 installs in the frame of rubber band machine and with first running roller 31 is connected, the rotatable installation of one end of swinging member 34 is in the frame, the other end with the tip of second running roller 32 rotates and is connected, swinging member 34 is relative can drive when the frame rotates second running roller 32 is relative first running roller 31 swings, the one end of extension spring 35 with the frame is connected, the other end with swinging member 34 connects, extension spring 35 be used for to a precompression is applyed to second running roller 32, so that first running roller 31 with second running roller 32 presss from both sides tightly the front end of rubber band 2. Before the elastic band is manufactured, the feeding device 1 can be used for conveying a section of elastic band 2 in advance, then the swinging piece 34 is driven to swing upwards to enable the second roller 32 to move towards the direction far away from the first roller 31, so that the front end of the elastic band 2 is arranged between the first roller 31 and the second roller 32 in a penetrating mode, after the penetrating is completed, the swinging piece 34 is driven to swing downwards to enable the second roller 32 to move towards the direction close to the first roller 31, at the moment, the tension spring 35 is in a stretching state, pre-pressure can be applied to the second roller 32, and the front end of the elastic band 2 is clamped between the first roller 31 and the second roller 32.

In this embodiment, each time the ultrasonic cutting device 4 cuts, the first roller 31 rotates by a predetermined angle, and drives the front end of the elastic band 2 to move by a predetermined length, so that the next cutting position of the ultrasonic cutting device 4 avoids the previous cutting position. The preset length is determined according to the material of the elastic band 2, and the movement amount of the elastic band 2 can be controlled by adjusting the parameters of the stepping motor 33, so that the material loss is reduced.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the first steering rod 36 and the second steering rod according to an embodiment of the present invention. The recycling device 3 further comprises a first steering rod 36, the front end of the elastic band 2 extends to a position between the first roller 31 and the second roller 32 through the first steering rod 36, and the first steering rod 36 is used for guiding the front end of the elastic band 2. In this embodiment, the first steering rod 36 is located between the feeding device 1 and the ultrasonic cutter device 4, and is used for guiding the front end of the elastic band 2, that is, changing the direction of the waste band.

Further, a first limiting block 37 and a second limiting block 38 are sleeved on the first steering rod 36, the elastic band 2 penetrates through the space between the first limiting block 37 and the second limiting block 38, and the first limiting block 37 and/or the second limiting block 38 can move on the first steering rod 36. The first limiting block 37 and the second limiting block 38 are respectively located on two sides of the elastic band 2 to limit the elastic band 2. The distance between the first limiting block 37 and the second limiting block 38 can be adjusted by moving the first limiting block 37 and/or the second limiting block 38, so that the elastic band 2 with different widths can be adapted. The rubber ring is regarded as being composed of an upper half ring and a lower half ring, the upper half ring is connected with one end of the lower half ring, the other end of the upper half ring is an opening, and the upper half ring and the lower half ring can be aligned through the first limiting block 37 and the second limiting block 38, so that the problem that the upper half ring and the lower half ring are staggered during subsequent cutting is solved.

Furthermore, the recovery device 3 further comprises a second steering rod 39 disposed parallel to the first steering rod 36, and the second steering rod 39 is closer to the ultrasonic cutter device 4 than to the first steering rod 36. The second steering rod 39 is mainly used for solving the problem of excessive material loss of the elastic band 2 caused by the fact that the distance between the first steering rod 36 and the ultrasonic cutter device 4 is too large.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an ultrasonic cutting device according to an embodiment of the present invention. The ultrasonic cutting device 4 comprises an ultrasonic generator 41, a cutting anvil 42, a cutting knife 43 and a lifting cylinder 44, wherein the cutting knife 43 and the cutting anvil 42 are respectively positioned above and below the elastic band 2, the lifting cylinder 44 is connected with the cutting knife 43 to drive the cutting knife 43 to move vertically and press the elastic band 2 on the cutting anvil 42, and the ultrasonic generator 41 is connected with the cutting anvil 42 to load ultrasonic vibration on the cutting anvil 42.

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 4 adopted in the embodiment needs to cut the elastic band 2, the lifting cylinder 44 drives the cutting knife 43 to descend and press the elastic band 2 on the cutting block 42, and then the ultrasonic generator 41 loads ultrasonic vibration on the cutting block 42, so that the elastic band 2 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 only by applying small force. And when the elastic band 2 is melted, the opening parts of the elastic rings 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 2 do not need to be spliced by two clamping mechanisms in the prior art, the problem of large butt joint is avoided, and the sewing quality is effectively guaranteed.

Further, the ultrasonic cutting device 4 further comprises a aligning mechanism, the aligning mechanism comprises a first aligning block 45 and a second aligning block 46, the first aligning block 45 and the second aligning block 46 are both arranged at the cut of the elastic band 2, a clamping groove for the elastic band 2 to pass through is formed between the first aligning block 45 and the second aligning block 46, and the first aligning block 45 and the second aligning block 46 can move relatively or oppositely to adjust the width of the clamping groove, so that the upper half ring and the lower half ring of the elastic band ring are aligned at the opening, and the dislocation problem is prevented.

Furthermore, the second aligning block 46 is provided with a waist-shaped long hole, the extending amount of the second aligning block 46 can be adjusted by changing the position of the fastener in the waist-shaped long hole, so that the width of the clamping groove can be adjusted, and the elastic band 2 with different widths can be adapted. For example, when the amount of extension of the second pair of centering blocks 46 is increased (rightward shift in fig. 6), the engaging groove between the first pair of centering blocks 45 and the second pair of centering blocks 46 becomes larger, and when the amount of extension of the second pair of centering blocks 46 is increased (leftward shift in fig. 6), the engaging groove between the first pair of centering blocks 45 and the second pair of centering blocks 46 becomes smaller.

Referring to fig. 7-8, fig. 7-8 are schematic structural views of a clamping device according to an embodiment of the present invention. The clamping device 5 comprises a first installation seat 51, a second installation seat 52, a third installation seat 53, a fourth installation seat 54, a first clamping mechanism and a second clamping mechanism, wherein the first installation seat 51 is arranged on the fourth installation seat 54 and can move along the Y axis relative to the fourth installation seat 54, the second installation seat 52 is arranged on the third installation seat 53 and can move along the Y axis relative to the third installation seat 53, the third installation seat 53 is arranged on the fourth installation seat 54 and can move along the X axis relative to the fourth installation seat 54, the fourth installation seat 54 can move along the X axis and the Y axis, and the first clamping mechanism and the second clamping mechanism are respectively arranged on the first installation seat 51 and the second installation seat 52 and are used for respectively clamping different parts of the rubber ring.

When the first mounting base 51 moves along the Y axis relative to the fourth mounting base 54, the first clamping mechanism is driven to move synchronously, when the second mounting base 52 moves along the Y axis relative to the third mounting base 53, the second clamping mechanism is driven to move synchronously, when the third mounting base 53 moves along the X axis relative to the fourth mounting base 54, the second mounting base 52 and the second clamping mechanism thereon are driven to move synchronously, and when the fourth mounting base 54 moves along the X axis or the Y axis, the first mounting base 51 and the third mounting base 53 are driven to move synchronously, and further, the first clamping mechanism and the second clamping mechanism 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 2, 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 2, Y axle positive direction is towards being close to the direction of making up the device (outwards stretching out), and Y axle negative direction is towards keeping away from the direction of making up the device (inwards withdrawing).

In this embodiment, the gripping device 5 further includes a first driving unit, a second driving unit, a third driving unit, a fourth driving unit, and a fifth driving unit;

the first driving unit includes a first air cylinder 511 and a first guide rail 512, the first air cylinder 511 and the first guide rail 512 are mounted on the fourth mounting seat 54, the first mounting seat 51 is slidably mounted on the first guide rail 512, and the first air cylinder 511 is used for driving the first mounting seat 51 to move along the Y axis;

the second driving unit includes a second cylinder 521 and a second guide rail 522, the second cylinder 521 and the second guide rail 522 are mounted on the second mounting seat 52, the second mounting seat 52 is slidably mounted on the second guide rail 522, and the second cylinder 521 is used for driving the second mounting seat 52 to move along the Y axis;

the third driving unit includes a step motor 531, a belt 532, a gear set, a third guide rail and a connecting member. The third guide rail and the step motor 531 are mounted on a fourth mounting seat 54, one gear of the gear set is mounted on the fourth mounting seat 54, the other gear is mounted on an output shaft of the step motor 531, the belt 532 is connected with the two gears of the gear set, the third mounting seat 53 is slidably mounted on the third guide rail and is fixed with the belt 532 through a connecting piece, when the step motor 531 is started, the belt 532 is driven by the gear to move, the belt 532 moves to drive the third mounting seat 53 to move along the X axis relative to the fourth mounting seat 54, and at this time, the second mounting seat 52 on the third mounting seat 53 and the second clamping mechanism on the second mounting seat 52 move along the X axis.

The fourth driving unit is configured to drive the fourth mounting seat 54 to move along the X axis, and has a structure similar to that of the first driving unit, and the fifth driving unit is configured to drive the fourth mounting seat 54 to move along the Y axis, and has a structure similar to that of the third driving unit, which is not described herein again. Of course, other driving methods are within the scope of the present application, and the present application is not limited thereto. In addition, the present embodiment is not particularly limited to the kind of the cylinder, and may be selected according to the need.

With reference to fig. 6, the first clamping mechanism includes a first clamping piece 551, a second clamping piece 552, and a first clamping cylinder 553, the first clamping piece 551 is installed on the first installation base 51, the second clamping piece 552 is located above the first clamping piece 551, the first clamping cylinder 553 is installed on the second clamping piece 552, and the telescopic rod penetrates through the second clamping piece 552 and then is connected with the first clamping piece 551, the first clamping cylinder 553 is used for driving the second clamping piece 552 to move vertically so as to clamp the elastic band 2 with the first clamping piece 551;

the second clamping mechanism comprises a third clamping piece 561, a fourth clamping piece 562 and a second clamping cylinder 563, the third clamping piece 561 is installed on the second installation seat 52, the fourth clamping piece 562 is located above the third clamping piece 561, the second clamping cylinder 563 is installed on the fourth clamping piece 562, an expansion rod penetrates through the fourth clamping piece 562 and then is connected with the third clamping piece 561, and the second clamping cylinder 563 is used for driving the fourth clamping piece 562 to vertically move so as to clamp the elastic band 2 with the third clamping piece 561.

In this embodiment, the second clip 552 has a through hole, and the telescopic rod of the first clamping cylinder 553 passes through the through hole and is connected to the first clip 551. For example, when the telescopic rod of the first clamping cylinder 553 is extended, the second clamping piece 552 is driven to move upwards, the distance between the first clamping piece 551 and the second clamping piece 552 is increased, when the first clamping mechanism is driven to move towards the direction close to the ultrasonic cutting device 4, the first clamping piece 551 and the second clamping piece 552 are respectively positioned at the inner side and the outer side of the elastic ring, and then the telescopic rod of the first clamping cylinder 553 is retracted, the second clamping piece 552 is driven to move downwards, so that the distance between the first clamping piece 551 and the second clamping piece 552 is reduced, and the elastic ring is clamped.

Similarly, a through hole is formed in the fourth clamping piece 562, and the telescopic rod of the second clamping cylinder 563 penetrates through the through hole and then is connected with the third clamping piece 561. For example, when the telescopic rod of the second clamping cylinder 563 extends, the fourth clamping piece 562 is driven to move upwards, and at this time, the distance between the third clamping piece 561 and the fourth clamping piece 562 is increased, and when the second clamping mechanism is driven to move towards the direction close to the ultrasonic cutting device 4, the third clamping piece 561 and the fourth clamping piece 562 are respectively located at the inner side and the outer side of the elastic ring, and then the telescopic rod of the second clamping cylinder 563 is retracted, and at this time, the fourth clamping piece 562 moves downwards, so that the distance between the third clamping piece 561 and the fourth clamping piece 562 is decreased, and thus the elastic ring is clamped together with the first clamping mechanism.

After the second clamping mechanism and the first clamping mechanism simultaneously clamp different parts of the elastic band ring, the third mounting seat 53 is driven to move along the X-axis negative direction relative to the fourth mounting seat 54, so that the second clamping mechanism can move along the X-axis negative direction relative to the first clamping mechanism, and the part to be sewn of the elastic band ring is spread. Meanwhile, when the second clamping mechanism moves along the negative direction of the X axis relative to the first clamping mechanism, the welding part of the elastic ring passes through the gap between the third clamping piece 561 and the fourth clamping piece 562 to be smoothed, so that the flatness during subsequent sewing is improved.

In this embodiment, the elastic sewing machine further includes a sewing device (not shown in the figure) for sewing the elastic ring at the position to be sewn, and the sewing device is, for example, a sewing machine.

Based on this, this embodiment still provides an elastic ring sewing method, adopts as above the elastic machine to make up, includes the following step:

s1, clamping the front end of an elastic band 2 between a first roller 31 and a second roller 32;

s2, conveying the elastic band 2 through the feeding device 1 to enable the elastic band 2 to form an elastic ring with a preset size in a conveying process;

s3, driving the second mounting seat 52 to move to a first preset position relative to the third mounting seat 53 along the positive direction of the Y axis, and driving the second clamping mechanism to act so as to clamp the part, close to the ultrasonic cutter device 4, of the elastic band 2;

s4, cutting the elastic band 2 through the ultrasonic cutter device 4 to form an elastic ring;

s5, driving the first roller 31 to rotate for a preset angle so as to drive the front end of the elastic band 2 to move for a second preset length;

s6, driving the fourth mounting seat 54 to move along the positive direction of the X axis relative to the third mounting seat 53 and driving the first clamping mechanism to move to a second preset position;

s7, driving the first mounting seat 51 to move to a third preset position relative to the fourth mounting seat 54 along the positive direction of the Y axis, and driving the first clamping mechanism to act so as to clamp the elastic ring together with the second clamping mechanism;

s8, driving the third mounting seat 53 to move along the positive direction of the X axis relative to the fourth mounting seat 54, and driving the second clamping mechanism to move along the negative direction of the X axis relative to the first clamping mechanism so as to spread the part to be sewn of the elastic ring;

s9, driving the fourth mounting seat 54 to move to a position to be sewn along the positive direction of the Y axis to sew the elastic ring;

s10, after sewing is finished, the whole clamping device 5 is reset.

First, step S1 is executed to drive the feeding device 1 to convey a certain length of the elastic band 2, so as to clamp the front end of the elastic band 2 between the first roller 31 and the second roller 32.

And then step S2 is executed, the elastic band 2 is conveyed through the feeding device 1, and the elastic band 2 is made to form an elastic ring with a preset size in the conveying process. Because the front end of the elastic band 2 is clamped between the first roller 31 and the second roller 32, which is equivalent to that one end of the elastic band 2 is fixed, the conveyed part of the elastic band 2 forms an elastic ring with gradually increased size along with the continuous conveying of the elastic band 2 by the feeding device 1.

And step S3 is executed, the second mounting seat 52 is driven to move to a first preset position along the positive direction of the Y axis relative to the third mounting seat 53, it is to be understood that at this time, the whole clamping device 5 is at an initial position, and at the initial position, the second mounting seat 52 is driven to move to the first preset position along the positive direction of the Y axis relative to the third mounting seat 53, so as to drive the second clamping mechanism to move towards the direction close to the elastic band 2, and at the same time, the second clamping cylinder 563 of the second clamping mechanism is driven to act, so as to clamp the part, close to the ultrasonic cutting device 4, of the elastic band 2.

And then, a step S4 is executed, the elastic band 2 is cut by the ultrasonic cutter device 4, and an elastic ring is formed.

After the cutting is finished, step S5 is executed to drive the first roller 31 to rotate by a predetermined angle, so as to drive the front end of the elastic band 2 to move by a second predetermined length. In this embodiment, each time the ultrasonic cutter device 4 cuts, the first roller 31 rotates by a predetermined angle and drives the front end of the elastic band 2 to move by a second predetermined length. This is because if the leading end of the elastic band 2 does not move, the weld point 6 of the previous elastic band will become the weld point 6 of the next elastic band, which easily cuts the elastic band 2, resulting in that the elastic band cannot be formed. Therefore, each time the ultrasonic cutter device 4 cuts, a new elastic ring is formed, and the excess part of the front end of the elastic band 2 becomes a waste band, which moves under the rotation of the first roller 31, and it can be understood that each time the first roller 31 rotates, the waste band grows one section to avoid the welding point 6 of the previous elastic ring.

Then, step S6 is executed to drive the fourth mounting seat 54 to move along the positive X-axis direction relative to the third mounting seat 53 and drive the first clamping mechanism to move to the second preset position. The purpose of this step is to move the entire clamp 5 away from the ultrasonic cutter device 4 so that the first clamping mechanism can extend along the Y-axis.

And step S7 is executed, the first mounting base 51 is driven to move to a third preset position along the positive direction of the Y axis relative to the fourth mounting base 54, and the first clamping mechanism is driven to act to clamp the elastic ring together with the second clamping mechanism.

Then, step S8 is executed to drive the third mounting seat 53 to move along the positive X-axis direction relative to the fourth mounting seat 54, and drive the second clamping mechanism to move along the negative X-axis direction relative to the first clamping mechanism to spread out the portion of the elastic band to be sewn, so that the welded portion of the elastic band passes through the gap between the third clamping piece 561 and the fourth clamping piece 562 to be smoothed, thereby improving the flatness in the subsequent sewing.

And then, executing the steps S9-S10, driving the fourth mounting seat 54 to move to the position to be sewn along the positive direction of the Y axis to sew the elastic ring, and resetting the whole clamping device 5 after sewing. And repeating the steps S2-S10 to continuously form the elastic ring.

To sum up, the embodiment of the utility model provides a rubber band machine, it is right through the mode of ultrasonic wave hot melt the rubber band area is cut and the required size of butt fusion formation rubber band circle, can effectively solve the rubber band circle that adopts current rubber band sewing mode to obtain and have the big problem of butt joint. And the front end of the elastic band is fixed through a recovery device, so that the elastic band is surrounded into an elastic ring with gradually increased size in the conveying process, the elastic band does not need to be turned over, and the structure of the elastic band machine and the sewing process of the elastic band are simplified.

The above description is only for the preferred embodiment of the present invention, and does not limit the present invention. Any technical personnel who belongs to the technical field, in the scope that does not deviate from the technical scheme of the utility model, to the technical scheme and the technical content that the utility model discloses expose do the change such as the equivalent replacement of any form or modification, all belong to the content that does not break away from the technical scheme of the utility model, still belong to within the scope of protection of the utility model.

Claims (11)

1. An elastic sewing machine, comprising:

the feeding device is used for conveying the elastic band;

the recovery device is used for fixing the front end of the elastic band in the process of conveying the elastic band by the feeding device so as to enable the elastic band to form an elastic ring with gradually increased size in the conveying process;

the ultrasonic cutter device is used for cutting the rubber ring in a hot melting mode to form a rubber ring;

the clamping device is used for clamping the rubber ring when the rubber ring is cut and moving the cut rubber ring to a position to be sewn;

the recovery device is also used for recovering an elastic band with a preset length every time the ultrasonic cutter device cuts, so that the next cutting position of the ultrasonic cutter device avoids the previous cutting position.

2. The elastic sewing machine of claim 1, wherein the recovery device comprises a first roller and a second roller which are matched, and the front end of the elastic band is clamped between the first roller and the second roller;

and when the ultrasonic cutter device cuts once, the first roller rotates by a preset angle and drives the front end of the elastic band to move by the preset length.

3. The elastic sewing machine according to claim 2, wherein the recycling device further comprises a stepping motor, a swinging member and a tension spring, the stepping motor is mounted on a frame of the elastic sewing machine and connected with the first roller, one end of the swinging member is rotatably mounted on the frame, the other end of the swinging member is rotatably connected with the end portion of the second roller, the swinging member can drive the second roller to swing relative to the first roller when rotating relative to the frame, one end of the tension spring is connected with the frame, the other end of the tension spring is connected with the swinging member, and the tension spring is used for applying a pre-pressure to the second roller so that the first roller and the second roller clamp the front end of the elastic belt.

4. The elastic sewing machine according to claim 2 or 3, wherein the recycling device further comprises a first steering rod, the front end of the elastic band extends between the first roller and the second roller through the first steering rod, and the first steering rod is used for guiding the front end of the elastic band.

5. The elastic sewing machine of claim 4, wherein a first limit block and a second limit block are sleeved on the first steering rod, the elastic band penetrates through the space between the first limit block and the second limit block, and the first limit block and/or the second limit block can move on the first steering rod.

6. The elastic sewing machine of claim 5, wherein said recovery device further comprises a second steering bar disposed parallel to said first steering bar, said second steering bar being closer to said ultrasonic cutter device than said first steering bar.

7. The 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 elastic band against the cutting anvil, and the ultrasonic generator is connected with the cutting anvil to apply ultrasonic vibration to the cutting anvil.

8. The elastic sewing machine of claim 7, 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 band, a slot for the elastic band 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.

9. The elastic sewing machine of claim 2, wherein the clamping device comprises a first mounting seat, a second mounting seat, a third mounting seat, a fourth mounting seat, a first clamping mechanism and a second clamping mechanism, the first mounting seat is arranged on the fourth mounting seat and can move along a Y axis relative to the fourth mounting seat, the second mounting seat is arranged on the third mounting seat and can move along a Y axis relative to the third mounting seat, the third mounting seat is arranged on the fourth mounting seat and can move along an X axis relative to the fourth mounting seat, the fourth mounting seat can move along an X axis and a Y axis, and the first clamping mechanism and the second clamping mechanism are respectively arranged on the first mounting seat and the second mounting seat and are used for respectively clamping different parts of the elastic ring.

10. The elastic sewing machine of claim 9, wherein the first clamping mechanism comprises a first clamping piece, a second clamping piece and a first clamping cylinder, the first clamping piece is mounted on the first mounting seat, the second clamping piece is located above the first clamping piece, the first clamping cylinder is mounted on the second clamping piece, a telescopic rod penetrates through the second clamping piece and then is connected with the first clamping piece, and the first clamping cylinder is used for driving the second clamping piece to move vertically so as to clamp the elastic band with the first clamping piece;

the second clamping mechanism comprises a third clamping piece, a fourth clamping piece and a second clamping cylinder, the third clamping piece is installed on the second mounting seat, the fourth clamping piece is located above the third clamping piece, the second clamping cylinder is installed on the fourth clamping piece, a telescopic rod penetrates through the fourth clamping piece, the fourth clamping piece is connected with the third clamping piece, and the second clamping cylinder is used for driving the fourth clamping piece to move vertically so as to clamp the elastic band with the third clamping piece.

11. An elastic sewing machine according to claim 9, characterised in that it further comprises sewing means for sewing the elastic band in the position to be sewn.

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