CN113668145A

CN113668145A - Cloth dragging wheel device of sewing equipment

Info

Publication number: CN113668145A
Application number: CN202111086732.3A
Authority: CN
Inventors: 吕艳伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2021-11-19

Abstract

The utility model provides a sewing machine mop wheel device which characterized in that: the mop feeding mechanism comprises a bracket, a roller feeding mechanism and a lifting mechanism. The upper roller mechanism comprises an upper fixing plate, at least two upper tugs and upper tug supports, and each upper tug forms a roller structure arranged along an upper rolling line. The lifting mechanism is connected between the upper fixing plate and the support and is switched between two positions of pressing the cloth and separating the cloth. The lower mop mechanism comprises a lower fixing plate, at least two lower mop wheels and a lower mop wheel support, and each lower mop wheel forms a roller structure arranged along a lower rolling line. At least one of the upper mop mechanism and the lower mop mechanism is provided with an active traction mechanism, and the number and the arrangement positions of the upper mop wheel and the lower mop wheel are in one-to-one correspondence when the upper mop mechanism is in a cloth pressing position. This scheme will be single-point mop in the past improved for the line mop, and it is big to have solved the intensity of labour that current single-point mop exists, problem that sewing efficiency and quality are low.

Description

Cloth dragging wheel device of sewing equipment

Technical Field

The invention relates to the field of sewing equipment, in particular to a cloth dragging wheel device for the sewing equipment. The sewing machine refers to a tool or a machine used for sewing, such as a sewing machine, a synchronous two-needle sewing machine, a simultaneous three-needle sewing machine, and a overlock machine.

Background

The sewing machine realizes the cloth feeding by matching the presser foot with the lower teeth in the sewing cloth. The cloth feeding mode usually has a slipping phenomenon, so that the sewn stitches are different in size, and the attractiveness is affected. The problem of difficult cloth feeding exists for some special fabrics, and even the fabric can not work normally. In order to solve the problem of smooth cloth feeding of sewing machines, the prior art provides various mop devices for sewing machines. Such as chinese patents CN206428421U, CN206408364U, CN208649606U, CN210262264U and CN 213447554U. The mop devices adopt the technical scheme that the mop devices are summarized in a single-point dragging mode, namely, a dragging wheel with driving property is adopted in front of a presser foot to help mop, so that single-point dragging is realized to replace manual dragging. However, in practical use, when a special material or a thick cloth is encountered, an operator still needs to manually push the cloth back and forth to assist in order to keep sewing smooth, and on the other hand, in order to ensure that the whole cloth of the chopping board moves in parallel in the sewing process, the operator also needs to manually push the cloth back and forth to assist (see fig. 1). Accordingly, the conventional single-point trailing type mop wheel (see the mop wheel device designated by the reference numeral 39 in fig. 1) has the following disadvantages: firstly, the cloth needs to be pushed back and forth manually in sewing, the labor intensity is high, and the workers are very tired due to the soreness and the back pain of the waist after the operation in one day. Secondly, because sewing and manual cloth pushing are synchronous motion, the cloth pushing reciprocating back and forth is intermittent motion, so that the sewing efficiency is low, and the time spent is longer. Thirdly, in the sewing process, the sizes and the amplitudes of the manual cloth pushing force are different each time, so that the consistency of the sizes of the sewn stitches is poor and not uniform, the sewing threads are not straight, and the straightness of the sewing threads is difficult to ensure.

In view of the above, the invention is a subject of the present invention to design a cloth dragging device of sewing equipment, which can reduce labor intensity and improve sewing efficiency and quality.

Disclosure of Invention

In view of the defects of the prior art, the invention provides a cloth dragging device of sewing equipment, and aims to solve the problems of high labor intensity and low sewing efficiency and quality of the conventional single-point cloth dragging device.

In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a sewing machine mop wheel device, includes mop mechanism and lower mop mechanism, uses the cloth of sewing as the reference under the user state, go up mop mechanism and be located the cloth top, lower mop mechanism is located the cloth below, goes up mop mechanism and mop mechanism counterpoint cooperation down moreover to this pulls the cloth and moves forward, and its innovation lies in:

the upper mop mechanism comprises a bracket, an upper roller mechanism and a lifting mechanism; the bracket is of a bracket body structure and is used for installing and positioning the upper roller mechanism and the lifting mechanism; the upper roller mechanism comprises an upper fixing plate, at least two upper tugs and an upper tug support, the upper fixing plate is of a plate structure, and the upper tugs are of roller structures; the upper roller mechanism defines an upper rolling pressing line which is positioned above the cloth and is vertical to the sewing wiring direction relative to the cloth, each upper tug is arranged at intervals along the upper rolling pressing line, the upper tug support is a support body, one end of the upper tug support is fixedly connected with the upper fixing plate, and the other end of the upper tug support is rotatably supported relative to the upper tug, so that each upper tug forms a roller structure which is arranged along the upper rolling pressing line; the lifting mechanism is composed of a linear driving mechanism, the linear driving mechanism is connected between an upper fixing plate and a support of the upper roller mechanism, and the upper roller mechanism can be driven to switch between two positions of pressing cloth and separating the cloth in a use state.

The lower mop mechanism comprises a lower roller mechanism, the lower roller mechanism comprises a lower fixing plate, at least two lower tugs and a lower tug support, the lower fixing plate is of a plate structure, and the lower tugs are of roller structures; the lower roller mechanism is defined to be provided with a lower rolling pressing line which is positioned below the cloth and is vertical to the sewing wiring direction relative to the cloth, each lower tug is arranged at intervals along the lower rolling pressing line, the lower tug support is a support body, one end of the lower tug support is fixedly connected with the lower fixing plate, and the other end of the lower tug support rotates relative to the lower tug to support, so that each lower tug forms a roller structure which is arranged along the lower rolling pressing line.

At least one of the upper mop mechanism and the lower mop mechanism is an active traction mechanism, an upper rolling pressing line in the upper mop mechanism is parallel to and close to a lower rolling pressing line in the lower mop mechanism under the condition that the upper mop mechanism is in a cloth pressing position, and the number and the arrangement positions of the upper tug wheels and the lower tug wheels are in one-to-one correspondence.

The relevant contents and variations of the above technical solution are explained as follows:

1. in the above solution, the "active traction mechanism" refers to a mechanism with an active driving torque relative to the driven mechanism, for example, the active driving torque is composed of a driving motor, a transmission shaft and a transmission structure, and can also be driven by the power of the sewing machine through a variable speed transmission mechanism. Whereas a driven mechanism refers to a mechanism without a driving torque.

2. In the above solution, the rolling line is an imaginary line perpendicular to the sewing line direction defined for describing the technical solution of the present patent, and the upper rolling line is a connection line located above the cloth and between each upper tug and the cloth contact point. Similarly, the "lower rolling line pressing" is a connecting line which is positioned below the cloth and is formed by the contact points of the lower tug wheels and the cloth.

3. In the scheme, the upper mop mechanism is provided with an active traction mechanism, the active traction mechanism comprises an upper driving motor, an upper synchronous transmission mechanism and an upper transmission shaft, the upper transmission shaft is parallel to the upper rolling line, each upper tug is axially arranged at intervals on the upper transmission shaft and is fixedly connected relative to the upper transmission shaft, the axis of the upper transmission shaft is superposed with the rotating axis of each upper tug, and the other end of the upper tug support rotatably supports the upper transmission shaft; the upper driving motor is positioned and installed on the upper fixing plate, and the rotating output end of the upper driving motor (4) is in transmission connection with the upper transmission shaft through the upper synchronous transmission mechanism.

4. In the above scheme, the lower mop mechanism has an active traction mechanism, the active traction mechanism includes a lower driving motor, a lower synchronous transmission mechanism, a lower transmission shaft support and a lower transmission shaft, the lower transmission shaft is parallel to the lower rolling line, the lower transmission shaft support is a support, one end of the lower transmission shaft support is fixedly connected with the lower fixing plate, the other end of the lower transmission shaft support rotatably supports the lower transmission shaft, the lower driving motor is positioned and mounted on the lower fixing plate, the rotating output end of the lower driving motor is fixedly connected with the lower transmission shaft, and the lower transmission shaft is in transmission connection with the lower tug through the lower synchronous transmission mechanism.

5. In the scheme, on the premise that the lower mop mechanism is an active traction mechanism, the lower mop wheel in the lower mop mechanism is rotatably supported on a lower mop wheel support through a lower mop wheel rotating shaft, a spring and a bolt are arranged between the lower mop wheel support and a lower fixing plate, the lower mop wheel support is connected with the lower fixing plate in a positioning mode through the bolt, and the spring is used for acting between the lower mop wheel support and the lower fixing plate and is positioned in the direction of pressing the lower mop wheel to form the elastic floating roller structure.

6. In the above scheme, the lifting mechanism of the upper mop mechanism mainly comprises a lifting cylinder, one end of the upper fixing plate is rotatably connected with the support in the lifting direction relative to the support, and the lifting cylinder is connected between the upper fixing plate and the support and acts on the lifting direction of the upper fixing plate.

7. In the above scheme, the lifting mechanism of the upper mop mechanism mainly comprises a lifting cylinder, the upper fixing plate is slidably connected with the bracket through a guide rail in the lifting direction, and the lifting cylinder is connected between the upper fixing plate and the bracket and acts on the lifting direction of the upper fixing plate.

8. In the above scheme, the device comprises a first sensor, a second sensor and a third sensor, wherein the first sensor and the second sensor are both normally open inductive switches, the third sensor is a normally closed inductive switch, the first sensor, the second sensor and the third sensor are all connected in series in an electrified loop of an electromagnetic valve of the lifting cylinder, the first sensor and the second sensor are all arranged on a panel surface of a chopping board of the sewing machine in a use state, the upper rolling pressing line is used as a reference, the second sensor is positioned on a cloth feeding side and is close to the position of the upper rolling pressing line, the first sensor is positioned on the cloth feeding side and is far away from the position of the upper rolling pressing line, and the third sensor is arranged beside a presser foot lifting pedal of the sewing machine and is in linkage fit with the presser foot lifting pedal of the sewing machine.

9. In the scheme, on the premise that the lower mop mechanism is a driven traction mechanism, the lower mop wheel support (19) is connected with the lower fixing plate in a positioning mode through the spring and the bolt between the lower mop wheel support and the lower fixing plate, and the spring acts between the lower mop wheel support and the lower fixing plate and is positioned in the direction of pressing cloth by the lower mop wheel, so that an elastic floating roller structure is formed.

10. Among the above-mentioned scheme, including the pinch roller mechanism, this pinch roller mechanism includes the pinch roller, the pinch roller pivot, the pressure arm, the pinch roller cylinder, gear train and pinch roller conveyer belt, the pressure arm is rod structure, the pinch roller rotates the one end of supporting at the pressure arm through the pinch roller pivot, the other end and the support of pressure arm lift up at the pinch roller and rotate in the whereabouts direction and be connected, the gear train comprises a pair of gear engagement, wherein, a gear is connected with the pinch roller transmission, another gear passes through the pinch roller conveyer belt and is connected with lower driving motor transmission, the pinch roller cylinder is connected between support and pressure arm, and be used in the pinch roller lift up with the whereabouts direction on.

The design principle of the invention is as follows: in order to solve the problems of high labor intensity, low sewing efficiency and low quality of the existing single-point mop device, the invention improves the prior single-point mop into a line mop mechanism consisting of at least two mopping wheels, and the mopping wheels in the line mop mechanism are arranged on a rolling pressing line in parallel at intervals so as to form an upper mop mechanism and a lower mop mechanism which are synchronously pulled along the rolling pressing line. FIG. 1 is a schematic view of the working state of a cloth dragging wheel device of a sewing machine in the prior art, FIG. 2 is a schematic view of the working state of the cloth dragging wheel device of the sewing machine in the invention, and the cloth dragging effect of the cloth dragging wheel device can be visually seen from the comparison between the FIG. 1 and the FIG. 2. The invention provides a sewing speed approximately synchronous with the sewing machine by controlling the driving motors in the upper mop mechanism and the lower mop mechanism through the electric cabinet, and can also realize speed fine adjustment according to different cloth materials to keep the speed completely synchronous with the sewing machine. Due to the adoption of the thread mop scheme, the cloth moves integrally on the chopping board of the sewing machine in the sewing process, thereby ensuring the smoothness of the cloth. The invention is widely suitable for processing cloth and home textile industries, such as processing of cloth products like bed sheets, quilt covers, plush bed sheets, four-piece covers, summer sleeping mats and the like, and processing of household products like curtains and the like.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:

1. because the invention adopts the scheme of contacting the integral mop cloth by lines, the manual reciprocating cloth pushing assistance is not needed in the sewing process, thereby greatly reducing the labor intensity.

2. Because the invention adopts the scheme of contacting the whole mop by the thread, continuous and uninterrupted sewing can be carried out, compared with the prior sewing and manual cloth pushing intermittent sewing, the sewing time is shortened, and the sewing efficiency is improved.

3. The invention adopts the scheme of contacting the whole mop by a line, thereby overcoming the problems of inconsistent stitch size and non-straight running caused by inconsistent manual cloth pushing force and pushing width in the prior sewing process, and improving the sewing quality.

4. The invention adopts the elastic floating roller structure aiming at the lower tug, so that each tug has the same mop traction force and the same mop traction speed when sewing cloth with different thicknesses at the same time.

5. According to the invention, the first sensor and the second sensor are arranged on the surface of the chopping board of the sewing machine aiming at the lifting cylinder, the third sensor is arranged beside the pedal of the lifting foot of the sewing machine, wherein the first sensor and the second sensor are both normally open inductive switches, the third sensor is a normally closed inductive switch, and the first sensor, the second sensor and the third sensor are all connected in series in an energizing loop of an electromagnetic valve of the lifting cylinder, so that the falling and lifting of the upper mop mechanism can be automatically controlled according to the entering and exiting of cloth and the lifting state of the presser foot of the sewing machine in the sewing process, and the semi-automatic operation is realized.

6. Because the invention can be equipped with the pinch roller mechanism in front of the presser foot of the sewing machine, the application of the pinch roller can effectively improve the traction force of the mop when the sewing machine is pulled by the mop with extremely thick cloth.

Drawings

FIG. 1 is a schematic view of a cloth dragging wheel device of a conventional sewing machine in a working state;

FIG. 2 is a schematic view of the working state of the cloth dragging wheel device of the sewing machine according to the present invention;

FIG. 3 is a schematic structural view of a cloth dragging wheel device of a sewing machine according to an embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at A;

FIG. 5 is an enlarged view of FIG. 3 at B;

FIG. 6 is a view showing a state that an upper tug of a cloth tug device of the sewing machine according to the embodiment of the invention is lifted;

FIG. 7 is a schematic diagram of the operation of a cloth dragging wheel device of the sewing machine according to the embodiment of the invention;

FIG. 8 is a schematic structural view of a lower tug of a cloth tug device of the sewing machine according to another embodiment of the invention;

FIG. 9 is a schematic view of the structure of the pressure roller of the cloth dragging wheel device of the sewing machine according to the embodiment of the invention.

The reference numerals in the above figures are explained as follows: 1. a support; 2. an upper fixing plate; 3. lifting the cylinder; 4. an upper drive motor; 5. an upper tug support; 6. an upper tug; 7. an upper transmission shaft; 8. a bracket fixing seat; 9. an upper motor positioning seat; 10. a spring; 11. a right angle fixture; 12. a hinge; 13. an upper synchronous transmission mechanism; 14. a cylinder connecting seat; 15. a lower fixing plate; 16. a lower drive motor; 17. a lower motor positioning seat; 18. a lower transmission shaft; 19. a lower tug support; 20. a lower tug; 21. a lower tug wheel rotating shaft; 22. a lower synchronous transmission mechanism; 23. a lower drive shaft support; 24. a bolt; 25. a linear bearing; 26. a pinch roller; 27. a pinch roller rotating shaft; 28. pressing the arm; 29. a pinch roller cylinder; 30. a pinch roller cylinder connecting seat; 31. a first sensor; 32. a second sensor; 33. a third sensor; 34. a sewing machine head; 35. a presser foot of the sewing machine; 36. the sewing machine lifts the presser foot pedal; 37. a sewing machine chopping board; 38. distributing; 39. the existing single-point dragging type mop wheel; 40. a gear set; 41. pinch roller conveyer belt.

Detailed Description

The invention is further described with reference to the following figures and examples:

example (b): cloth dragging wheel device of sewing equipment

As shown in fig. 3-9, the cloth dragging wheel device of the sewing device comprises an upper cloth dragging mechanism and a lower cloth dragging mechanism (see fig. 3), wherein in the use state, the upper cloth dragging mechanism is used as a reference (see fig. 2) for sewing cloth 38, the upper cloth dragging mechanism is positioned above the cloth 38 (see fig. 3 upper half mechanism), the lower cloth dragging mechanism is positioned below the cloth 38 (see fig. 3 lower half mechanism), and the upper cloth dragging mechanism and the lower cloth dragging mechanism are aligned and matched so as to drag the cloth 38 to move forwards.

The upper mop mechanism comprises a bracket 1, an upper roller mechanism and a lifting mechanism (see the upper half mechanism of figure 3). The support 1 is of a support body structure and is used for installing and positioning the upper roller mechanism and the lifting mechanism. The upper roller mechanism comprises an upper fixing plate 2, three upper tugs 6, three upper tug supports 5, an upper driving motor 4, an upper synchronous transmission mechanism 13 and an upper transmission shaft 7 (see figure 3). The upper fixing plate 2 is of a plate body structure, and the upper tug 6 is of a roller structure; the upper roller mechanism defines an upper rolling pressing line (not shown in fig. 3, it is conceivable that there is a cloth 38 between the upper mop mechanism and the lower mop mechanism in fig. 3) which is located above the cloth 38 and perpendicular to the sewing running direction, the upper transmission shaft 7 is arranged parallel to the upper rolling pressing line, each upper tug 6 is axially spaced from the upper transmission shaft 7 and is fixedly connected with respect to the upper transmission shaft 7 (see fig. 3), the axis of the upper transmission shaft 7 coincides with the rotation axis of each upper tug 6, the three upper tug supports 5 are support bodies, one end of each upper tug support 5 is fixedly connected with the upper fixing plate 2, and the other end of each upper tug support 5 rotatably supports the upper transmission shaft 7, so that each upper tug 6 forms a roller structure arranged along the upper rolling pressing line. The upper driving motor 4 is positioned and installed on the upper fixing plate 2 through an upper motor positioning seat 9 (see fig. 3), and the rotating output end of the upper driving motor 4 is in transmission connection with the upper transmission shaft 7 through an upper synchronous transmission mechanism 13 (see fig. 4). In this embodiment, the upper driving motor 4 may be a stepping motor or a servo motor, and the synchronous transmission mechanism 13 is a synchronous pulley transmission mechanism.

The lifting mechanism is composed of a linear driving mechanism, the linear driving mechanism is connected between the upper fixing plate 2 and the bracket 1 of the upper roller mechanism, and the upper roller mechanism can be driven to switch between two positions of pressing the cloth 38 and separating the cloth 38 in a use state. In the present embodiment, the linear driving mechanism is a lifting cylinder 3 (see fig. 3), one end of the upper fixing plate 2 is rotatably connected with the bracket 1 in a lifting direction through a hinge 12 (see fig. 4), and the lifting cylinder 3 is connected between the upper fixing plate 2 and the bracket 1 through a cylinder connecting seat 14 and acts in the lifting direction of the upper fixing plate 2. Fig. 3 shows the upper mop mechanism in a lowered position to compress the cloth 38 and fig. 6 shows the upper mop mechanism in a raised position to disengage the cloth 38.

The lower mop mechanism comprises a lower roller mechanism, and the lower roller mechanism comprises a lower fixing plate 15, three lower tugs 20, three lower tug supports 19, a lower driving motor 16, three lower synchronous transmission mechanisms 22, three lower transmission shaft supports 23 and a lower transmission shaft 18 (see fig. 3). The lower fixing plate 15 is a plate structure, the lower towing wheel 20 is a roller structure, the lower roller mechanism defines a lower rolling line (not shown in fig. 3, it is conceivable to have a cloth 38 between the upper mop mechanism and the lower mop mechanism in fig. 3) which is located below the cloth 38 and perpendicular to the sewing running direction with respect to the cloth 38, the lower transmission shaft 18 is arranged parallel to the lower rolling line (see fig. 3), the lower transmission shaft support 23 is a support body, one end of the lower drag wheel is fixedly connected with the lower fixing plate 15, the other end of the lower drag wheel rotatably supports a lower transmission shaft 18 (shown in figure 3), each lower drag wheel 20 is arranged at intervals along the lower rolling line, a lower drag wheel support 19 is a supporting body, one end of the lower fixing plate is fixedly connected with the lower fixing plate 15, and the other end of the lower fixing plate rotatably supports a lower tug 20 (see fig. 3) through a lower tug rotating shaft 21, so that each lower tug 20 forms a roller structure arranged along a lower rolling line. The lower driving motor 16 is positioned and mounted on the lower fixing plate 15 through a lower motor positioning seat 17 (see fig. 3), the rotating output end of the lower driving motor 16 is fixedly connected with a lower transmission shaft 18, and the lower transmission shaft 18 is in transmission connection with a lower tug 20 through a lower synchronous transmission mechanism 22 (see fig. 3).

In order to make the lower tug 20 have elastic floating capacity, the lower tug 20 is rotatably supported on the lower tug support 19 through a lower tug rotating shaft 21, but a spring 10, a bolt 24 and a linear bearing 25 (see fig. 5) are arranged between the lower tug support 19 and the lower fixing plate 15, the lower tug support 19 is provided with a hole, the linear bearing 25 and the spring 10 are arranged in the hole, the bolt 24 penetrates through the linear bearing 25 and the spring 10 from the top of the lower tug support 19 to be connected on the lower fixing plate 15 in a threaded manner, namely, the bolt 24 is used for positioning and connecting the lower tug support 19 and the lower fixing plate 15, and the spring 10 acts between the lower tug support 19 and the lower fixing plate 15 and is positioned in the direction that the lower tug 20 presses the cloth 38, so that the elastic floating roller structure is formed. When meeting cloth 38 that the thickness is different, tow boat 20 can carry out the elasticity and give way down, do not influence each other between the tow boat 20 under adjacent, can adapt to the different thickness change that same cloth 38 corresponds tow boat 20 position under the difference. The linear bearing 25 is used for ensuring the consistency of elastic yielding of the lower tug 20.

In this example, both the upper mop mechanism and the lower mop mechanism are provided with active traction mechanisms composed of a driving motor, a transmission shaft and a transmission structure, and under the state that the upper mop mechanism is at the position of pressing cloth 38, the upper rolling pressing line in the upper mop mechanism is parallel to and close to the lower rolling pressing line in the lower mop mechanism, wherein the number and the arrangement positions of the upper mop 6 and the lower mop 20 are in one-to-one correspondence. One of the three groups of tow wheels is drawn along the direction of the sewing machine presser foot 35, and the other two groups are drawn parallel to the direction of the sewing machine presser foot 35, so that the cloth is not required to be manually pushed forwards to keep the smoothness of the cloth.

In this example, in order to obtain a certain automatic control effect, three inductive switches, namely a first sensor 31, a second sensor 32 and a third sensor 33, may be disposed on the sewing machine, wherein the first sensor 31 and the second sensor 32 are both normally open inductive switches, the third sensor 33 is a normally closed inductive switch, the first sensor 31, the second sensor 32 and the third sensor 33 are all connected in series in an energizing circuit of the solenoid valve of the lifting cylinder 3, in a use state, the first sensor 31 and the second sensor 32 are all disposed on a panel surface of a sewing machine panel 37 (see fig. 7), with the upper rolling pressing line as a reference, the second sensor 32 is located on a side of a cloth feeding 38 and close to the upper rolling line (see fig. 7), the first sensor 31 is located on a side of the cloth feeding 38 and far from the upper rolling line (see fig. 7), the third sensor 33 is disposed beside a presser foot lifting pedal 36 of the sewing machine and is in linkage with the presser foot lifting pedal 36 of the sewing machine (see fig. 7) ). During sewing, when the cloth 38 is opened and closed by the first sensor 31, the cloth 38 is continuously conveyed forwards by the presser foot 35 of the sewing machine, when the second sensor 32 is reached, the power circuit supplies power to the electromagnetic valve of the lifting cylinder 3, the lifting cylinder 3 works, and the upper mop mechanism falls to the position for pressing the cloth 38. The upper tug 6 and the lower tug 20 clamp and drag the cloth 38 (the electric cabinet is connected with the driving motors of the sewing machine and the tug, so that the sewing speed and the mop speed can be kept synchronous). When the cloth 38 is about to be conveyed, the cloth 38 cannot block the first sensor 31, at the moment, the first sensor 31 is normally opened from being closed, and the cylinder 3 is lifted up by the power-off circuit to lift up the upper mop mechanism. In the other situation, when the cylinder 3 is lifted to put down the upper mop mechanism, if the presser foot of the sewing machine is lifted, the third sensor 33 is triggered to be switched from the normal close state to the open state, and the electrifying circuit is powered off to lift the cylinder 3 to lift the upper mop mechanism. The advantages are that the tugboat can not only synchronize the presser foot of the sewing machine, but also automatically lift up after the cloth is conveyed, and does not need to be manually operated and controlled. The cloth feeding and discharging device can automatically control the descending and the lifting of the upper mop mechanism according to the cloth feeding and discharging and the lifting state of the presser foot of the sewing machine in the sewing process, and semi-automatic operation is realized. Not only improves the working efficiency, but also can not bring burden to the working personnel. Of course, the control mode is not absolute and can be flexibly changed according to different requirements.

In this example, in order to solve the problem of insufficient traction force of the mop with extra thick cloth, a pressing wheel mechanism (see fig. 9) may be specially added, the pressing wheel mechanism includes a pressing wheel mechanism, the pressing wheel mechanism includes a pressing wheel 26, a pressing wheel rotating shaft 27, a pressing arm 28, a pressing wheel cylinder 29, a gear set 40 and a pressing wheel conveyor belt 41, the pressing arm 28 is of a rod structure, the pressing wheel 26 is rotatably supported at one end of the pressing arm 28 through the pressing wheel rotating shaft 27, the other end of the pressing arm 28 is rotatably connected with the support 1 in the lifting and falling direction of the pressing wheel 26, the gear set 40 is formed by meshing a pair of gears, wherein one gear is in transmission connection with the pressing wheel 26, the other gear is in transmission connection with the lower driving motor 16 through the pressing wheel conveyor belt 41, the pressing wheel cylinder 29 is connected between the support 1 and the pressing arm 28, and acts on the lifting and falling directions of the pressing wheel 26. The pressing wheel mechanism solves the problem that the single cloth with extra thickness is pulled immovably by the sewing machine, and the whole mop traction force is improved by means of the pressing wheel at the moment. The pinch roller 26 is preferably spaced closely to, but not interfering with, the presser foot 35 of the sewing machine. The above roller mechanisms may also be replaced with tracks as will be understood and appreciated by those skilled in the art.

In the embodiment, in order to improve the friction force of the upper tug 6 and the lower tug 20, the outer edge of the tug is encapsulated to form the rubber wrapping wheel.

Other embodiments and structural variations of the present invention are described below:

1. in the above embodiment, both the upper mop mechanism and the lower mop mechanism adopt the active traction mechanism composed of the driving motor, the transmission shaft and the transmission structure (see fig. 3). However, the present invention is not limited to this, and in theory, at least one of the upper mop mechanism and the lower mop mechanism may have an active traction mechanism consisting of a driving motor, a transmission shaft and a transmission structure, and both of them have better mop traction effects by active traction, and particularly, the effect is more obvious when thick cloth or cloth with different thickness is sewn, which can be understood and known by those skilled in the art.

2. In the above embodiment, the timing transmission mechanism 13 employs a timing pulley transmission mechanism (see fig. 4). The present invention is not so limited and sprockets and chain drives, gear drives, couplings, etc. can be used, as will be understood and appreciated by those skilled in the art.

3. In the above embodiment, the linear driving mechanism is a solution that the lifting cylinder 3 rotates to lift the upper mop (see fig. 6), but the present invention is not limited to this, and a solution that the lifting cylinder 3 moves to lift the upper mop may be adopted, that is, the upper fixing plate 2 is slidably connected with the bracket 1 through a guide rail in the lifting direction, and the lifting cylinder 3 is connected between the upper fixing plate 2 and the bracket 1 and acts in the lifting direction of the upper fixing plate 2. The action of the raising cylinder 3 moves the upper mop mechanism as a whole to switch between two positions of pressing the cloth 38 and releasing the cloth 38, as will be understood and appreciated by those skilled in the art.

4. In the above embodiment, the upper mop mechanism employs three upper mops 6, and the lower mop mechanism employs three lower mops 20 (see fig. 3). The present invention is not limited thereto, and the number of the wheels of the upper mop mechanism and the lower mop mechanism should be the same and be equipped in a one-to-one correspondence. However, the number of the tug wheels is at least two, that is, two tug wheels, or four tug wheels, or even more, in addition to three tug wheels, as will be understood and appreciated by those skilled in the art.

5. In the above embodiment, the lower mop mechanism is an active traction mechanism, and the lower mop wheel 20 has elastic floating abdicating capability (see fig. 5). The design is suitable for sewing different fabrics and fabrics with different thicknesses. However, the present invention is not limited thereto, and when some sewing equipment of a factory only contacts thin and light cloth, the active traction mechanism in the lower mop mechanism can be eliminated, and the elastic floating abdicating capability of the lower mop 20 is kept. Therefore, the mop cloth dropping mechanism is simple, and the cost is reduced. As shown in fig. 8, a spring 10, a bolt 24 and a linear bearing 25 are arranged between the lower tug support 19 and the lower fixing plate 15, a hole is formed in the lower tug support 19, the linear bearing 25 and the spring 10 are arranged in the hole, the bolt 24 penetrates through the linear bearing 25 and the spring 10 from the top of the lower tug support 19 and is in threaded connection with the lower fixing plate 15, namely the bolt 24 positions and connects the lower tug support 19 and the lower fixing plate 15, and the spring 10 acts between the lower tug support 19 and the lower fixing plate 15 and is positioned in the direction of pressing the cloth 38 by the lower tug 20, so that an elastic floating roller structure is formed.

6. In the above embodiment, the lifting mechanism is constituted by the linear driving mechanism, which is the lifting cylinder 3 (see fig. 3). However, the present invention is not limited to this, and the linear driving mechanism may be a linear motor, a motor and screw and nut mechanism, a hydraulic cylinder, etc., in addition to the cylinder. It is understood and accepted by those skilled in the art that, in addition to the linear driving mechanism, the lifting mechanism may also be a cam mechanism combined with a spring to rotate the upper mop lifting mechanism (the upper fixing plate 2), or even a motor combined with a chain wheel mechanism or a synchronous pulley mechanism to rotate the upper mop lifting mechanism (the upper fixing plate 2) at a certain point on a chain or a belt.

7. In the above embodiment, the lower tug 20 has elastic floating abdicating capability (see fig. 5). The invention is not limited to this, however, and it is also possible to arrange the design of the resilient floating abduction in the upper mop mechanism. Theoretically, the upper mop mechanism and the lower mop mechanism can be provided with a tug elastic floating abdicating structure in one or both of the upper mop mechanism and the lower mop mechanism, but the tug elastic floating abdicating structure is not a necessary condition for the invention, and the upper mop mechanism and the lower mop mechanism can not be provided with the elastic floating abdicating structure and can be replaced by elastic deformation of the rubber covered wheel.

8. In the above embodiment, both the upper mop mechanism and the lower mop mechanism adopt the active traction mechanism composed of the driving motor, the transmission shaft and the transmission structure (see fig. 3). However, the present invention is not limited thereto, and the present invention may be directly driven by the power of the sewing machine through a variable speed transmission mechanism, which can be understood and accepted by those skilled in the art.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a sewing machine mop wheel device, includes mop mechanism and lower mop mechanism, uses sewn cloth (38) as the reference under the user state, go up mop mechanism and be located cloth (38) top, lower mop mechanism is located cloth (38) below, goes up mop mechanism moreover and is counterpointed the cooperation with lower mop mechanism to this pulls cloth (38) and moves forward, its characterized in that:

the upper mop mechanism comprises a bracket (1), an upper roller mechanism and a lifting mechanism; the support (1) is of a frame body structure and is used for installing and positioning the upper roller mechanism and the lifting mechanism; the upper roller mechanism comprises an upper fixing plate (2), at least two upper tugs (6) and an upper tug support (5), wherein the upper fixing plate (2) is of a plate structure, and the upper tugs (6) are of a roller structure; the upper roller mechanism defines an upper rolling line pressing which is positioned above the cloth (38) and is vertical to the sewing line running direction relative to the cloth (38), each upper tug (6) is arranged at intervals along the upper rolling line pressing, the upper tug support (5) is a support body, one end of the upper tug support is fixedly connected with the upper fixing plate (2), and the other end of the upper tug support is rotatably supported relative to the upper tug (6), so that each upper tug (6) forms a roller structure which is arranged along the upper rolling line pressing; the lifting mechanism is composed of a linear driving mechanism, the linear driving mechanism is connected between an upper fixing plate (2) and a bracket (1) of the upper roller mechanism, and the upper roller mechanism can be driven to switch between two positions of pressing the cloth (38) and separating the cloth (38) in a use state;

the lower mop mechanism comprises a lower roller mechanism, the lower roller mechanism comprises a lower fixing plate (15), at least two lower tugs (20) and a lower tug support (19), the lower fixing plate (15) is of a plate body structure, and the lower tugs (20) are of roller structures; the lower roller mechanism defines a lower rolling pressing line which is positioned below the cloth (38) and is vertical to the sewing wiring direction relative to the cloth (38), each lower tug (20) is arranged at intervals along the lower rolling pressing line, the lower tug support (19) is a support body, one end of the lower tug support is fixedly connected with the lower fixing plate (15), and the other end of the lower tug support is rotatably supported relative to the lower tug (20), so that each lower tug (20) forms a roller structure which is arranged along the lower rolling pressing line;

at least one of the upper mop mechanism and the lower mop mechanism is an active traction mechanism, an upper rolling pressing line in the upper mop mechanism is parallel to and close to a lower rolling pressing line in the lower mop mechanism when the upper mop mechanism is in a position state of pressing cloth (38), wherein the number and the arrangement positions of the upper mop wheels (6) and the lower mop wheels (20) are in one-to-one correspondence.

2. The mop wheel device of sewing machine according to claim 1, characterized in that: the upper mop mechanism is provided with an active traction mechanism, the active traction mechanism comprises an upper driving motor (4), an upper synchronous transmission mechanism (13) and an upper transmission shaft (7), the upper transmission shaft (7) is parallel to the upper rolling line, each upper tug (6) is axially arranged at intervals on the upper transmission shaft (7) and is fixedly connected with the upper transmission shaft (7) relative to the upper transmission shaft, the axis of the upper transmission shaft (7) is superposed with the rotating axis of each upper tug (6), and the other end of the upper tug support (5) rotatably supports the upper transmission shaft (7); the upper driving motor (4) is positioned and installed on the upper fixing plate (2), and the rotating output end of the upper driving motor (4) is in transmission connection with the upper transmission shaft (7) through an upper synchronous transmission mechanism (13).

3. The mop wheel device of sewing machine according to claim 1, characterized in that: the lower mop mechanism is provided with an active traction mechanism, the active traction mechanism comprises a lower driving motor (16), a lower synchronous transmission mechanism (22), a lower transmission shaft support (23) and a lower transmission shaft (18), the lower transmission shaft (18) is parallel to the lower rolling pressing line, the lower transmission shaft support (23) is a support body, one end of the lower transmission shaft support is fixedly connected with the lower fixing plate (15), the other end of the lower transmission shaft support rotatably supports the lower transmission shaft (18), the lower driving motor (16) is positioned and installed on the lower fixing plate (15), the rotating output end of the lower driving motor (16) is fixedly connected with the lower transmission shaft (18), and the lower transmission shaft (18) is in transmission connection with a lower mop wheel (20) through the lower synchronous transmission mechanism (22).

4. The mop wheel device of sewing machine according to claim 3, characterized in that: lower tow boat (20) in the mop mechanism down rotates through tow boat pivot (21) and supports on tow boat support (19) down, spring (10) and bolt (24) between tow boat support (19) and bottom plate (15), bolt (24) with tow boat support (19) and bottom plate (15) location connection down, between tow boat support (19) and bottom plate (15) under spring (10) effect to lie in tow boat (20) and compress tightly cloth (38) direction, constitute elasticity floating roller structure with this.

5. The mop wheel device of sewing machine according to claim 1, characterized in that: the lifting mechanism of the upper mop mechanism mainly comprises a lifting cylinder (3), one end of an upper fixing plate (2) is rotatably connected with a support (1) in the lifting direction, and the lifting cylinder (3) is connected between the upper fixing plate (2) and the support (1) and acts on the lifting direction of the upper fixing plate (2).

6. The mop wheel device of sewing machine according to claim 1, characterized in that: go up the lifting mechanism of mop mechanism and mainly constitute by lifting up cylinder (3), upper fixed plate (2) are through guide rail and support (1) sliding connection in the direction of lifting up, lift up cylinder (3) and connect between upper fixed plate (2) and support (1) and act on upper fixed plate (2) in the direction of lifting up.

7. The mop wheel device of sewing machine according to claim 5 or 6, characterized in that: comprising a first sensor (31), a second sensor (32) and a third sensor (33), wherein the first sensor (31) and the second sensor (32) are both normally open inductive switches, the third sensor (33) is a normally closed inductive switch, the first sensor (31), the second sensor (32) and the third sensor (33) are all connected in series in an energizing loop of an electromagnetic valve of the lifting cylinder (3), the first sensor (31) and the second sensor (32) are arranged on the surface of the chopping board (37) of the sewing machine in a use state, and by taking the upper rolling pressing line as reference, the second sensor (32) is positioned at the side of the cloth (38) and close to the position of the upper rolling pressing line, the first sensor (31) is positioned at the side of the cloth (38) and far away from the position of the upper rolling pressing line, and the third sensor (33) is arranged beside the presser foot lifting pedal (36) of the sewing machine and is in linkage fit with the presser foot lifting pedal (36) of the sewing machine.

8. The mop wheel device of sewing machine according to claim 1, characterized in that: the lower mop mechanism is a driven traction mechanism, a spring (10) and a bolt (24) are arranged between a lower mop wheel support (19) and a lower fixing plate (15), the lower mop wheel support (19) and the lower fixing plate (15) are positioned and connected through the bolt (24), and the spring (10) acts between the lower mop wheel support (19) and the lower fixing plate (15) and is positioned in the direction that a lower mop wheel (20) compresses cloth (38), so that an elastic floating roller structure is formed.

9. The mop wheel device of sewing machine according to claim 1, characterized in that: including pinch roller mechanism, this pinch roller mechanism includes pinch roller (26), pinch roller pivot (27), pressure arm (28), pinch roller cylinder (29), gear train (40) and pinch roller conveyer belt (41), pressure arm (28) are rod body structure, pinch roller (26) rotate the one end of supporting at pressure arm (28) through pinch roller pivot (27), the other end and support (1) of pressure arm (28) are lifted up and are rotated on the whereabouts direction at pinch roller (26) and be connected, gear train (40) comprise a pair of gear engagement, wherein, a gear is connected with pinch roller (26) transmission, another gear is connected with lower driving motor (16) transmission through pinch roller conveyer belt (41), pinch roller cylinder (29) are connected between support (1) and pressure arm (28), and be used in pinch roller (26) lift up and the whereabouts direction.