CN218905549U - Thread breaking arm, thread breaking mechanism, thread breaking device, sewing machine and automatic printing equipment - Google Patents

Abstract

The utility model provides a wire breaking arm, a wire breaking mechanism, a wire breaking device, a sewing machine and automatic printing equipment, wherein the wire breaking arm comprises a knife and a contact piece, the knife is used for cutting off a wire of materials, the contact piece comprises a contact, the knife comprises a knife edge used for breaking the wire, and a space is reserved between the knife edge and the contact. The wire breaking arm and the wire breaking mechanism provided by the utility model improve the wire breaking efficiency. The thread cutting device, the sewing machine and the automatic printing equipment solve the problem of automatic cutting of threads among materials, manual thread cutting is not needed any more, the thread cutting device comprises a plurality of pressing balls, the pressing balls can enable the materials to be conveyed to thread cutting positions smoothly, thread cutting operation is achieved stably, and misoperation of thread cutting does not occur.

Description

Thread breaking arm, thread breaking mechanism, thread breaking device, sewing machine and automatic printing equipment

Technical Field

The utility model relates to the field of thread assembly, in particular to a thread breaking arm, a thread breaking mechanism, a thread breaking device, a sewing machine and automatic printing equipment.

Background

In the existing certificate production, the middle parts of the cover and the inner pages of a plurality of certificates are sewn together through threads by a sewing machine, and the binding mode has the advantages of firmness, durability and the like. After sewing binding is completed, a process of cutting the connecting line between the two products is required. In the existing production activities related to sewing machines, a large number of sewing machines have no automatic thread breakage function.

Therefore, manually cutting the line between two products is one way commonly employed by factories. However, the manual wire breakage mode has high labor cost, low production efficiency and low automation efficiency, and the wire breakage position and the wire end state are affected by manual operation experience. Therefore, a device is needed to cut the connecting line between two products in the production process of the sewing machine, so that the original manual process is changed into mechanical automatic production.

Disclosure of Invention

Therefore, the problem of low manual wire breakage efficiency in the prior art is solved, and a component, a device or a machine capable of rapidly wire breakage is provided, so that the production efficiency is improved.

In order to solve the problems, the utility model provides a wire breaking arm, which comprises a knife and a contact piece, wherein the contact piece is arranged at the end part of the wire breaking arm, the knife comprises a knife edge for breaking a material, the contact piece comprises a contact, and a gap is reserved between the knife edge of the knife and the contact.

The spacing may be used to provide space such that material and wire are not cut; within the space may also be a space for accommodating a knife-covering member, for example, a knife-covering member, to avoid cutting material or wire by the knife. The spacing is greater than or equal to the layer thickness of the component capable of covering the knife edge.

In some embodiments, the four edges of the material in the flat state are a first end, a second end, a third end and a fourth end, the surface of the material is a surface of the material surrounded by the first end, the second end, the third end and the fourth end, the distance between the knife edge and the contact is greater than or equal to a minimum distance, and the minimum distance is: when the contact contacts the surface of the material, and the conditions of the knife without cutting line and the material are met, the shortest distance between the knife edge and the contact.

In some embodiments, there is a difference in height between the portion of the material pressed by the contact and the portion of the material not pressed by the contact, the difference in height being a first distance, the shortest distance being greater than the first distance.

In some embodiments, the spacing may be selected from 0.5cm, 0.8cm, 1cm, 1.2cm, 1.5cm, 2cm, 3cm.

In some embodiments, when there are two or more contacts, the knife edge may be disposed between the contacts, so long as the material does not touch the knife edge.

In some embodiments, the knife edge is a beveled edge or a flat edge.

In some embodiments, the knife edge is a beveled edge, the beveled edge having an angle of 15-165 ° with the contact; and/or the contact piece is arranged on one side of the end part of the wire breaking arm, and the knife edge of the knife is arranged on the other side of the end part of the wire breaking arm.

In some embodiments, the contact and the blade are resiliently mounted to a wire breaking arm, the wire breaking arm providing a blade receiving portion into which the blade is retracted or extended in response to movement of the contact. When the contact contacts the surface of the material, the contact is pressed to drive the knife to retract into the knife accommodating part of the wire breaking arm, and when the contact is separated from the surface of the material, the knife extends out of the accommodating part of the wire breaking arm. The elastic mounting mode can be a spring or elastic material or an automatic induction type automatic access device.

In some embodiments, the contact is movably connected with other parts of the contact. When the contact and the blade are movably mounted, the other parts of the contact piece can be movably arranged on the wire breaking arm or can be fixed on the wire breaking arm.

In some embodiments, the wire breaking arm is deformable. The wire breaking arm comprises a body, wherein the contact piece and the knife are arranged on the body, and the body is made of flexible materials. When the contact contacts the surface of the material, the wire breaking arm is bent and deformed; when the contact breaks away from the surface of the material and enters the gap between the two materials, the broken wire arm is restored by deformation.

In some embodiments, the wire breaking arm comprises a body, the contact and/or the knife being integrally formed with the body; and/or, the contact of the contact piece comprises a circular arc structure.

In some embodiments, the contact comprises one, two, or more than three contacts; and/or the width of the contact piece is not more than 1/4 of the width of the wire breaking arm.

In some embodiments, the breaking arm is mounted to a rotary mount, and may also be mounted to a reciprocating drive. Through the arrangement between the contact and the knife edge of the wire breaking arm, the wire cannot be cut off by mistake, and the wire breaking efficiency is improved. Compared with the existing manual wire breaking mechanism, the wire breaking mechanism provided by the utility model can be used for rapidly improving the wire breaking efficiency.

In some embodiments, the body of the wire break arm is sheet-like. The body of the wire breaking arm can also be columnar.

In some embodiments, the contact may be sheet-like or cylindrical.

The utility model provides a wire breaking mechanism which comprises the wire breaking arms and a shaft, wherein one, two or more than three wire breaking arms are connected with the shaft.

In some embodiments, the breaking arm is mounted on the shaft by a rotary mount that is a cylinder, a triangular column, a tripod, a cube, a cuboid, a regular pentagon, or a regular hexagon; and/or, the wire breaking mechanism comprises an adjusting mechanism, and the adjusting mechanism is used for adjusting the position of the shaft up and down. The adjustment mechanism may include a threaded screw or a rack and pinion or other structure that facilitates positional adjustment of the shaft.

In some embodiments, the adjustment mechanism includes a bearing housing and an adjustment plate, the bearing housing being secured to the adjustment plate. Or the bearing seat and the adjusting plate are elastically connected through a spring structure or through an elastically deformed material. When encountering the material, the rotary mounting piece and the bearing seat can move upwards, and when no material exists, the rotary mounting piece and the bearing seat move downwards to the starting point under the restoring force of the spring.

The utility model provides a wire breaking device which comprises the wire breaking arm or the wire breaking mechanism, and further comprises a conveying device and a protecting device, wherein the conveying device is used for conveying materials, and the protecting device comprises a protecting cover which is used for protecting the wire breaking arm.

In some embodiments, the protection device further comprises a cover plate, the conveying device comprises a conveying belt, a power device and a conveying auxiliary mechanism, the conveying belt is connected with the power device, the power device comprises a motor, the motor provides power for movement of the conveying belt, the conveying auxiliary mechanism comprises a plurality of pressing balls, the plurality of pressing balls are arranged on the cover plate, the cover plate is arranged on the upper side of the conveying belt, holes for limiting the pressing balls are formed in the cover plate, and the pressing balls are pressed on materials by pressure and/or gravity of the pressing plates.

In some embodiments, the shield is attached to the cover plate by magnetic force.

In some embodiments, the cover plate is provided with a positioning groove for facilitating positioning of the protective cover.

The utility model provides a sewing machine, which comprises the thread breaking arm, the thread breaking mechanism or the thread breaking device.

The utility model provides automatic printing equipment, which comprises the wire breaking arm, the wire breaking mechanism, the wire breaking device or the sewing machine.

The material can be certificates, books and other wire products.

In some embodiments, the conveying path of the material may be a horizontal direction conveying, and when the material is conveyed along a horizontal plane, the surface of the material pressed by the contact is an upper surface or a lower surface of the material. In some embodiments, the material may be conveyed in a vertical direction.

The utility model has the following beneficial effects:

1. according to the utility model, the wire breaking arm with the contact piece is arranged, so that misoperation on wire breaking is solved, the frequency of wire breaking can be effectively improved, and the technical effect of rapid wire breaking is achieved. The wire breaking mechanism has the advantages of simple and reliable structure, low manufacturing cost, low processing technology requirement and wide application range, and can be matched with devices in other working procedures. The wire breaking device solves the problem of automatic wire cutting between materials, does not need manual wire breaking, has high wire breaking speed, consistent wire end state of wire breaking and identical wire breaking position, and improves wire breaking efficiency. According to the utility model, the thread breaking device and the sewing machine form an automatic production line, so that the labor can be reduced, and the production efficiency is improved.

2. In the utility model, the wire breaking power can be derived from an electric device such as a motor, and also can be derived from power generated when materials advance. The timing of the wire breakage action depends on the space left between the two materials. When the wire is broken by means of power generated during advancing of materials, an automatic working process when the wire breaking action is started and the wire is broken is realized by means of a simple and ingenious mechanical mechanism. The equipment broken string part can be used for automatically operating the broken string mechanism when materials exist, and the automatic shutdown of the material-free broken string mechanism is realized, so that the energy consumption is saved, and the potential risk of the equipment, which is caused by the fact that the equipment always rotates, is effectively avoided.

3. According to the utility model, the guiding part is arranged, so that the material can smoothly reach the broken line position.

4. According to the utility model, the pressing ball is arranged, so that the material can be smoothly conveyed to the wire breakage position, and the stable wire breakage operation can be realized.

5. In the utility model, the guide part, the conveyer belt, the pressing ball, the wire breaking arm and the like form a mutually-cooperated whole body, and mutually cooperate with each other to jointly realize the technical effect of quick wire breaking.

Drawings

Fig. 1 is a general schematic view of a wire breaking device.

Fig. 2 is an exploded view of the wire breaking device.

Fig. 3 is a schematic structural view of the wire breaking mechanism.

Fig. 4 is a schematic view of the first material after entering the wire breaking device.

Fig. 5 is a schematic view of the wire breaking arm at one side of the first material.

Fig. 6 is a schematic view of a wire breaking arm between two materials.

Fig. 7 is a schematic view of a wire breaking arm cutting a wire between materials.

Fig. 8 is a schematic view of a protective cover.

Fig. 9a-9c are schematic diagrams of the initial state of the wire-breaking device when in operation.

Fig. 10-15 are schematic diagrams of the movement of the wire breaking mechanism during wire breaking.

Fig. 16 is a schematic view showing a state of a partial area of the first material when the first breaking arm and the second breaking arm are simultaneously contacted with the surface of the first material.

The reference numerals are expressed as:

1. a wire breaking device; 2. a conveying device; 3. a wire breaking mechanism; 4. a wire; 5. a frame; 6. a support part; 7. a guide part; 8. a protective device; 9. a first material; 10. a second material; 21. a conveyor belt; 22. a speed regulating motor; 23. a switch; 24. ball pressing; 31. a shaft; 32. a rotary mounting member; 33. a wire breaking arm; 34. bearings, 35, screws; 36. an adjusting mechanism; 361. a bearing seat; 362. an adjusting plate; 331. a knife; 332. a contact; 333. a contact; 334. a first wire breaking arm; 335. a second wire breaking arm; 336. a third wire breaking arm; 61. a first knife slot; 81. a protective cover; 82. a cover plate; 83. and a second sipe.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to fig. 1 to 16 of the present utility model.

The structure of the wire breaking device of the utility model is shown in fig. 1 and 2, and comprises a conveying device 2 and a wire breaking mechanism 3. The conveying device 2 is used for conveying materials, and the wire breaking mechanism 3 is used for breaking wires.

The wire breaking device 1 further comprises a frame 5, a support part 6, a guiding part 7, a shielding device 8. The support part 6 is provided on the frame 5, and the guide part 7 and the wire breaking mechanism 3 are provided on the support part 6. The guide part 7 is used for guiding the movement direction of the materials; the protective device 8 provides protection for the wire-breaking device 1 and the protective device 8 protects the knife 331. With the protective device 8, the operator does not touch the knife edge during operation of the device.

As shown in fig. 3, the wire breaking mechanism 3 includes a shaft 31, a rotary mount 32, and a wire breaking arm 33. The number of the breaking arms 33 is 3, 3 breaking arms 33 are mounted on the rotary mounting member 32, 3 breaking arms 33 are mounted on the circumference of the rotary mounting member 32 at an interval angle of 120 °, and the breaking arms 33 are fixed along the tangential direction of the rotary mounting member 32. The rotary mount 32 is centrally mounted with a bearing 34 and is mounted in a central position of the shaft 31. The shaft 31 is provided on an adjustment mechanism 36. The adjustment mechanism 36 can adjust the vertical direction of the shaft 31.

In some embodiments, the breaking arms 33 may be mounted along the radius of the swivel mount 32 with a 120 ° spacing angle between the two breaking arms.

In some embodiments, the number of the wire breaking arms 33 may be reasonably set according to the size of the material and the wire breaking efficiency, for example, one piece, 2 pieces or multiple pieces.

In the present utility model, the rotary mount 32 is a cylinder, as shown in FIG. 3. The cylinder can reduce the pivoted resistance, improves rotation inertia, and then improves pivoted efficiency. The bearing 34 is disposed at the center of the rotation mount 32, the rotation mount 32 is disposed on the shaft 31 through the bearing 34, and the rotation mount 32 may be disposed at the middle position of the shaft 31 or may be disposed at one side of the shaft 31 as needed. In the mounting, the rotary mount 32 and the bearing 34 may be mounted together, and then the rotary mount 32 and the bearing 34 may be mounted on the shaft. After the installation, the rotary mounting member 32 is secured to rotate freely on the shaft 31 without jamming, and then the rotary shaft is mounted to the up-down regulating mechanism 36. It is also possible to combine the shaft 31 with the bearing 34 and then mount the rotary mount 32 on the bearing 34.

In some embodiments, a plurality of swivel mounts 32 may be provided on the shaft 31 for improved efficiency.

In some embodiments, the cylindrical rotary mounting member 32 may be replaced by a triangular prism, a square, a regular pentagonal prism, a regular hexagonal prism, etc., and the triangular prism facilitates the installation of the breaking arm 33, and since the triangular prism is used as a connecting member between the breaking arm 33 and the shaft 31, the breaking arm 33 can make surface contact with the triangular prism, and the installation firmness of the breaking arm 33 is improved. One or more fixing points can be adopted between the broken wire arm 33 and the triangular column.

In the present utility model, the breaking arm 33 is fixed to the rotary mount 32 by a screw 35, as shown in fig. 3.

In some embodiments, the wire breaking arm 33 may also be fixed with glue, or snap-fit.

In some embodiments, a slot is provided on the outer circumference of the swivel mount 32 or other connector, into which the wire breaking arm 33 can be inserted to be secured by a screw 35 or snap.

The shaft 31 is mounted at both ends on the adjusting mechanism 36, and the adjusting mechanism 36 includes a bearing housing 361 and an adjusting plate 362, and the bearing housing 361 is fixed at an upper portion of the adjusting plate 362. The adjusting plate 362 is provided on the frame, the supporting portion 6 is supported by the frame 5, and the position of the adjusting plate 362 on the supporting portion 6 is adjustable. The adjusting plate 362 includes two elongated grooves for vertically adjusting the position of the adjusting plate 362 with respect to the supporting portion 6 or the conveying device, thereby changing the vertical position of the shaft 31.

In some embodiments, the position of the shaft 31 may be changed not only in the up-down direction but also in the front-back and left-right directions so as to bring the pressure of the wire breaking arm 33 against the document and the wire 4 within a suitable range. The change in position of the shaft 31 may be adjusted by the arrangement of grooves or holes, or by gears and racks, screws and nuts, etc.

In some embodiments, the force between the contact and the material is within a suitable range such that the rotating member may be driven by the material.

As shown in fig. 3, in the present utility model, the wire breaking arm 33 includes a knife 331 and a contact 332, the contact 332 is provided at a first end of the wire breaking arm 33, the knife includes a knife edge for breaking a wire, the contact 332 includes a contact 333, and the contact 333 is: when the contact 332 is above the material, the portion of the contact 332 that is in contact with the material. And the knife edge of the knife 331 is spaced from the contact 333 of the contact 332 by a preset distance that satisfies the following condition: when the contact 333 of the contact 332 is in contact with the material, the knife edge continues to line and does not cut the material. The contact 333 is provided at an end of the contact 332.

In the present utility model, the contact 332 is disposed at one side of one end of the breaking arm, and the knife edge of the knife 331 is disposed at the other side of the one end of the breaking arm, as shown in fig. 3. The breaking arm 33 includes a body, and the contact 332 is integrally formed with the body. Preferably, the contact 333 of the contact 332 includes a circular arc structure. The arc structure is convenient for protecting the surface of the material from being worn out or propped against. The contact 332 ends are smooth, reaching no visible machining marks, reducing friction to the material.

In some embodiments, the material of the wire break arm 33 may be selected 304 from stainless steel.

In some embodiments, the knife may also be a conventional wallpaper blade secured to the blade holder with glue.

In some embodiments, the contact 332 is a piece that is mounted to the body, facilitating replacement of the contact 332 when damage to the contact 332 occurs.

In some embodiments, the contact 332 and the knife are each integrally formed with the body. The integral molding is convenient for improving the integral strength of the part, and is also beneficial to force transmission when the material pushes the wire breaking arm. The integrally formed wire breaking arm simplifies the connecting structure and can improve the firmness and stability of the device.

In some embodiments, the width of the contact 332 is no more than 1/4 of the width of the breaker arm. Because the broken wire arm in this application can be promoted by the material is light to the flexible characteristic of line 4 self, consequently, set up the width of edge of a knife and be wider than the contact of contact 332, can make things convenient for the contact of edge of a knife and line 4, guarantee the reliability of broken wire operation.

In some embodiments, the knife edge is a flat knife edge. Preferably, in the present utility model, the knife edge is an inclined edge, as shown in fig. 3. When the inclined knife edge is selected, the wire is easy to slide at the knife edge, so that the wire is more convenient to break.

In some embodiments, the angled knife edge is 15-165 degrees from the contact 332. When the included angle between the inclined knife edge and the contact piece 332 is an acute angle, the knife edge is arranged on one side of the knife close to the contact piece 332, and when the knife edge is selected in this way, the success rate of wire breakage can be further ensured; when the included angle between the inclined knife edge and the contact piece is an obtuse angle, the knife edge is arranged on one side of the knife away from the contact piece, so that when the knife edge is selected, even if the line is not cut off, the material can continue to advance, and machine clamping can not occur. Preferably, the angle between the inclined knife edge and the contact piece is 135 degrees.

In some embodiments, to facilitate wire breakage, the knife edge is toothed or the knife edge includes one or more V-shapes.

As shown in fig. 2 and 4, the wire breaking device 1 includes a guide portion 7, and the guide portion 7 is provided on the support portion 6. The guide 7 includes a straight line section and an introduction section. The leading-in section is located at the front end of the guide 7 for leading in the material to enter the straight section of the guide 7. The front end of the guide part 7 is close to the material inlet end of the wire breaking device 1. The straight line section comprises two straight line guide rails positioned at two sides of a material, the guide section comprises two circular arc guide rails positioned at two sides of the material, and the circular arcs are arranged in an open state.

In some embodiments, the straight line section of the guiding part 7 includes an upper edge, where the upper edge is a border connected to a vertical part of the straight line section, and the upper edge includes a turnover part where the guiding part 7 turns to the material side, and the upper edge can avoid the end of the material from curling or turning up, so that the material advances along a predetermined direction. Preferably, the cross section of the turnover part is arc-shaped.

In some embodiments, the tail of the leading-in section comprises a guiding edge, the guiding edge is connected with the upper edge, and the guiding edge is arc-shaped or inclined, so that the material can be smoothly led into the straight line section, and curling or upturning of the end part of the material is avoided.

As shown in fig. 2, the guard 8 includes a cover 82 and a shield 81. The cover plate 82 is located above the conveyor belt 21, the cover plate 82 covering the guide rail and a first section of the conveyor belt 21, the first section of the conveyor belt 21 comprising the portion of the conveyor belt 21 that is in contact with the material. The protective cover 81 is arranged on the cover plate 82, the cover plate 82 is provided with a second knife groove 83 corresponding to the protective cover 81, and the second knife groove 83 is used for enabling the knife and the rotary mounting piece 32 to penetrate through the cover plate 82. The side plates of the shield 81 have holes or slots for the shaft 31 to pass through.

The cover 82 and the shield 81 may be made of transparent materials. The transparent material is acrylic material.

The mode of magnet can be selected to the connected mode of protection casing 81 and apron, can be firm reliable when convenient dismantlement and fixed. The locating groove is arranged in the middle of the cover plate, the locating groove comprises a first surface, and the first surface is arranged in the cover plate and has a height difference with the outer surface of the cover plate. The first surface is provided with the second knife slot. The positioning groove is rectangular.

As shown in fig. 5 to 7, the conveying apparatus 2 includes a conveying belt 21 and a conveying assistance mechanism. In the utility model, two conveying belts 21 are arranged, one end of each conveying belt 21 is connected with a driving wheel, and the other end is connected with a driven wheel. The driving wheel is connected with the power device through a driving shaft. The power means comprise an electric motor and a switch 23. In the utility model, the driving wheel is arranged at the material inlet end of the wire breaking device, and the motor is arranged at one end of the driving shaft. A switch 23 is arranged on one side of the motor, and the switch 23 can regulate the speed of the wire breaking device or control the starting and stopping of the wire breaking device.

In some embodiments, the switch 23 controlling the speed regulation and start-stop of the breaking device may be two switches, one responsible for speed regulation and the other responsible for start-stop. In some embodiments, a start-stop switch is provided at each of the different locations of the device to facilitate emergency shutdown.

As shown in fig. 2, in the present utility model, the conveying auxiliary mechanism includes a plurality of pressing balls 24, the plurality of pressing balls 24 are disposed on the cover plate, the cover plate is disposed on the upper side of the conveying belt 21, and the cover plate is provided with a hole for limiting the pressing balls 24. One ball 24 corresponds to one hole. The ball 24 may rely on gravity to limit the upper portion of the passing material.

In some embodiments, the ball 24 rolls in the hole of the cover plate, and does not fall out of the hole, in this case, the ball 24 limits the material on the upper side of the material, and the pressure of the ball 24 on the material includes gravity and the pressure of the cover plate on the ball 24. The conveying auxiliary mechanism enables all parts of the material to be in a relatively flat state, and friction between the material and the cover plate or other devices is reduced.

In some embodiments, the holes may be holes through the cover plate or holes that are open only on one side of the cover plate.

In some embodiments, a delivery assistance mechanism including a plurality of press balls 24 may not be provided. Utilize the apron to carry out spacingly to material upper portion, also can set up another conveyer belt 21 in the material upside to form the centre gripping of conveyer belt 21 to the material.

In the utility model, the conveying auxiliary mechanism with a plurality of pressing balls 24 can well improve the conveying effect of materials, and the protection effect on the materials is obviously better than that of a wire breaking device without the pressing balls 24.

In some embodiments, the pressing ball 24 may be selected from glass balls, plastic balls, rubber balls, ceramic balls. Preferably, the pressing ball 24 is a glass ball or a ceramic ball, and the surface of the glass ball or the ceramic ball is smooth and has a certain weight, so that the material is more convenient to convey. The size of the ball 24 may be selected to be one or two centimeters in diameter, or other size that facilitates processing and installation.

As shown in fig. 2, the supporting part 6 is provided with a first knife slot 61, and when the knife on the rotary mounting member 32 rotates to the side of the supporting part 6, a part of the knife is accommodated by the first knife slot 61. The first sipe 61 has a rectangular shape. The first sipe 61 may be a groove penetrating the supporting portion 6, or a groove having a bottom arm.

The frame 5 is composed of a 50 x 50 aluminum profile which is durable and convenient to transport and assemble. The frame can be sized according to the height of the sewing machine so that the frame is connected with the sewing portion of the sewing machine to form an automatic production line.

As shown in fig. 2, in order to facilitate moving the position of the wire breaking device, the bottom of the wire breaking device is provided with a universal wheel. The number of the universal wheels is 4, and one universal wheel corresponds to one corner of the frame.

The material is a certificate product or other sewn products, and the products can be paper products or composite materials. The material is introduced into the wire breaking device of the utility model in the correct sequence and angle.

The power device is responsible for providing proper speed and power for materials received by the guide rail to enter a thread breaking process, and transmitting the materials with the broken threads to the next process, and the power device is also responsible for working in matching with the discharging speed of the sewing machine, so that the output of the sewing machine after the sewing is synchronous with the broken thread output of the thread breaking device, and the speed difference between the output of the sewing machine and the broken thread output of the thread breaking device can be automatically eliminated, so that the output and the broken thread output of the sewing machine are matched.

The working method of the utility model is as follows:

in some embodiments, the wire breaking method comprises the steps of:

step 1, when a first material 9 is conveyed to an inlet of a wire breaking device, a conveying device of the wire breaking device starts conveying the first material 9, the conveying device conveys the first material 9 to a wire breaking mechanism, the wire breaking mechanism comprises a rotary mounting piece, at least 3 wire breaking arms are arranged on the rotary mounting piece, the at least 3 wire breaking arms comprise a first wire breaking arm 334, a second wire breaking arm 335 and a third wire breaking arm 336, and the first material pushes the first wire breaking arm 334 to drive the rotary mounting piece of the wire breaking mechanism to rotate;

step 2, when the second wire breaking arm 335 enters the space between the first material 9 and the second material 10, the contact piece at the end of the second wire breaking arm 335 collides with the second material 10, the acting force is applied between the second material 10 and the back end of the contact piece of the second wire breaking arm 335, and the rotating mounting piece is driven to rotate further, and in the rotating process, the wire between the first material 9 and the second material 10 is broken by the knife on the second wire breaking arm 335.

In the above method, the contact manner of the contact piece at the back end of the second wire breaking arm 335 and the second material 10 may be a collision manner, so as to improve the interaction force between the contact piece and the second material, so as to facilitate better implementation of wire breaking.

The number of the wire breaking arms in the method can be 4, 5 and 6, and the interval between the wire breaking arms is larger than the length of the first material 9. The breaking arms may be evenly arranged along the rotary mount.

In some embodiments, the method of operation is as follows:

and step 1, the materials comprise a first material 9 and a second material 10 which are sequentially arranged. When the first material 9 is conveyed to the inlet of the wire breaking device, the conveying device 2 of the wire breaking mechanism starts conveying the first material 9, and the conveying belt 21 of the conveying device 2 conveys the first material 9 to the wire breaking mechanism.

In step 2, the contact of the first breaking arm 334 is in contact with the surface of the first material 9. The first material 9 pushes the breaking arm to rotate the rotary mounting 32.

In the present method, the initial state of the first breaking arm 334 may be a vertical state with respect to the first material 9 or an inclined state with respect to the first material 9, for which the first material 9 can be pushed, as shown in fig. 9a to 9 c. When the initial state of the first wire breaking arm 334 is a state of being inclined relative to the first material 9, the included angle formed by the first wire breaking arm 334 and the first material 9 may be an obtuse angle or an acute angle. The first end of the first material 9 is first contacted with the first breaking arm 334. Before the first end of the first mass 9 is in contact with the first breaking arm 334, said first end is located higher than the position of the contact 333 of the contact 332 of the first breaking arm 334. The contact may be located at a distal end of the contact in the direction in which the first breaking arm 334 extends. The shape and thickness of the contact are not limited to those shown in the present utility model, and can be adjusted accordingly according to the trajectory of the relative movement when the first material 9 contacts the contact, so that the relative movement between the two is more convenient for wire breakage.

Step 3, when the first material 9 enters a certain distance, the rotary mounting member 32 continues to rotate a certain angle, and then the contact member of the first wire breaking arm and the contact member of the second wire breaking arm 335 contact the same surface of the material at the same time, as shown in fig. 10-12. At this time, the first material 9 is pressed by the two breaking arms, and the section of the partial area of the first material which is pressed is concave, as shown in fig. 16. The first material 9 continues to move forward and the contact of the first breaking arm 334 and the contact of the second breaking arm 335 slide on the surface of the first material 9.

In step 4, the second wire breaking arm 335 is slid into the space between the first material 9 and the second material 10. At this time, the contact of the first breaking arm 334 is still on the surface of the first material 9. The first mass 9 gradually returns to its flat shape from the deformed state, and the first mass 9 generates an upward thrust force F against the first breaking arm 334, as shown in fig. 13. When the second wire breaking arm 335 moves to the first end of the second material 10, the contact of the end of the second wire breaking arm 335 and the second material 10 contact, there is a force between the second material 10 and the contact of the second wire breaking arm 335 and drives the rotating mounting to rotate further, during which the wire between the first material 9 and the second material 10 is cut off by the knife on the second wire breaking arm 335.

Step 5, the wire between the first material and the second material has been cut off and the first material 9 is discharged from the wire cutter.

Step 6, beginning step 2 at this time, and entering the next cycle. And each time the wire breaking work is finished, the wire breaking mechanism rotates by 120 degrees.

Fig. 16 is a schematic diagram of deformation of the first material, where a specific deformation shape is affected by factors such as material selection of the first material, setting of material pressure by the wire breaking arm, and the like.

In some embodiments, to facilitate pushing of the wire breaking arm, the material is positioned higher than the position of the contacts of the wire breaking arm.

In some embodiments, the level of material on the conveyor may float up and down. When the wire breaking arm is in contact with the surface of the material, the height of the material is lowered, and when the wire breaking arm is away from the material, the height of the material is raised.

In some embodiments, the wire breaking arm may be mounted in a manner that extends along a tangential direction of the rotary mounting member, or may be mounted in a direction that extends along a radius of the rotary mounting member, or in any other manner that facilitates installation and wire breaking.

The working principle of the utility model is as follows:

when the contact piece contacts the material on the surface of the material, the knife edge cannot contact the material because the contact of the contact piece has a preset distance from the knife edge, and at the moment, the material and the wire cannot be cut by the knife. When the wire breaking arms are positioned between materials, the contact piece is not in contact with the upper parts of the materials, at the moment, the wire is in a suspended state, the knife edge of the wire breaking arms is in contact with the wire, and the wire is separated by the knife.

Regarding the pressure between the contact and the material, the height of the rotary mount 32 is adjusted by adjusting the height of the rotary mount to a state where the adjacent two contact members can slightly press the material with force by the adjusting mechanism 36, which is selected according to the thickness of the material and the material. The force between the surface of the material and the contacts will be converted into a force that turns the swivel mount 32 when the second wire break arm 335 slides between the first material 9 and the second material 10. The pushing force of the first end of the material against the breaking arm is converted into a force that turns the rotary mount 32. The two forces together complete the entire workflow.

In some embodiments, the thrust of the first end of the material against the breaking arm plays a major role in breaking.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally attached; can be mechanically or electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The orientation or positional relationship indicated is based on that shown in the drawings for convenience of description only, and is not necessarily required to have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the utility model.

The above description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the disclosed technology. Therefore, any modification, equivalent variation and modification of the above embodiments according to the technology of the present utility model fall within the protection scope of the present utility model.

Claims (13)

1. A wire breaking arm, characterized in that: the wire breaking arm comprises a knife (331) and a contact piece (332), the contact piece is arranged at the end part of the wire breaking arm, the knife (331) comprises a knife edge for breaking a wire of a material, the contact piece (332) comprises a contact (333), and a gap is reserved between the knife edge of the knife (331) and the contact (333).

2. The wire breaking arm according to claim 1, wherein: the edges of the periphery of the material in a flat state are a first end, a second end, a third end and a fourth end respectively, the surface of the material is a surface of the material surrounded by the first end, the second end, the third end and the fourth end, the distance between the knife edge and the contact is greater than or equal to the minimum distance, and the minimum distance is: when the contact (333) is in contact with the surface of the material, the shortest distance between the knife edge and the contact (333) is achieved when the conditions of the knife without cutting the line and the material are met.

3. The wire breaking arm according to claim 1 or 2, characterized in that: the knife edge of the knife (331) is an inclined knife edge or a flat knife edge;

and/or the contact (333) and the blade (331) are resiliently mounted to a wire breaking arm, the wire breaking arm being provided with a blade receiving portion into which the blade is retracted or extended in association with movement of the contact;

and/or the wire breaking arm comprises a body, wherein the contact piece (332) and the knife (331) are arranged on the body, and the body is made of flexible materials.

4. The wire breaking arm according to claim 1 or 2, characterized in that: the knife edge of the knife (331) is an inclined knife edge, and the included angle between the inclined knife edge and the contact piece (332) is 15-165 degrees; and/or the contact (332) is arranged on one side of the end of the wire breaking arm (33), and the knife edge of the knife is arranged on the other side of the end of the wire breaking arm (33).

5. The wire breaking arm according to claim 1 or 2, characterized in that: the breaking arm (33) comprises a body, the contact (332) and/or the knife (331) being integrally formed with the body; and/or the contact (333) of the contact (332) comprises a rounded structure.

6. The wire breaking arm according to claim 1 or 2, characterized in that: the contact (332) comprises one, two or more than three contacts (333); and/or the width of the contact (332) is not more than 1/4 of the width of the breaking arm (33).

7. A wire breaking mechanism is characterized in that: comprising a breaking arm according to any one of claims 1-6, said breaking mechanism further comprising a shaft, one, two or more than three of said breaking arms being connected to the shaft.

8. The wire-break mechanism of claim 7, wherein: the wire breaking arm is mounted on the shaft through a rotary mounting piece (32), and the rotary mounting piece (32) is a cylinder, a triangular column, a tripod, a cube, a cuboid, a regular pentahedron or a regular hexahedron;

and/or the wire breaking mechanism comprises an adjusting mechanism (36), the position of the shaft (31) is adjusted up and down by the adjusting mechanism (36), the adjusting mechanism (36) comprises a bearing seat (361) and an adjusting plate (362), the bearing seat (361) is fixed on the adjusting plate (362), or the bearing seat (361) and the adjusting plate (362) are elastically connected through a spring structure or are elastically connected through an elastically deformed material.

9. A wire breaking device, characterized in that: comprising a wire breaking arm according to any one of claims 1-6 or a wire breaking mechanism according to claim 7 or 8, the wire breaking device further comprising a conveying device (2) and a shielding device (8), the conveying device (2) being for conveying a material, the shielding device (8) comprising a shielding cover (81), the shielding cover (81) being for protecting the wire breaking arm (33).

10. The wire breaking device according to claim 9, wherein: the protection device (8) further comprises a cover plate (82), the conveying device (2) comprises a conveying belt (21), a power device and a conveying auxiliary mechanism, the conveying belt (21) is connected with the power device, the power device comprises a motor (22), the motor (22) provides power for movement of the conveying belt (21), the conveying auxiliary mechanism comprises a plurality of pressing balls (24), the plurality of pressing balls (24) are arranged on the cover plate (82), the cover plate (82) is arranged on the upper side of the conveying belt (21), the cover plate (82) is provided with holes for limiting the pressing balls (24), and the pressing balls are pressed on materials by pressure and/or gravity of the pressing plates.

11. The wire breaking device according to claim 10, wherein: the protective cover (81) is connected with the cover plate (82) through magnetic force; and/or the cover plate (82) is provided with a positioning groove which is convenient for positioning the protective cover (81).

12. A sewing machine, characterized in that: comprising a wire breaking arm according to any of claims 1-6, or a wire breaking mechanism according to claim 7 or 8, or a wire breaking device according to any of claims 9-11.

13. An automatic printing apparatus, characterized in that: comprising a thread breaking arm according to any one of claims 1-6, or a thread breaking mechanism according to claim 7 or 8, or a thread breaking device according to any one of claims 9-11, or a sewing machine according to claim 12.

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