CN211256292U - Embroidery machine tabouret with cloth tightening device - Google Patents

Abstract

The utility model relates to an embroidery machine tabouret of tight cloth device in area, including fixed frame, clamp plate and compress cylinder, fixed frame includes long frame and wide frame, be provided with broadside on the wide frame and press from both sides the cloth device, the clamp plate articulates on long frame, the compress cylinder sets up on long frame, the piston rod tip and the clamp plate of compress cylinder are connected and rotate in order to promote the clamp plate, be provided with tight cloth device on the long frame, tight cloth device is including tight cloth cylinder and pneumatic clip, tight cloth cylinder sets up on long frame and along long frame length direction distribution, pneumatic clip sets up on the piston rod of tight cloth cylinder and sets up towards fixed frame. The utility model discloses utilize pneumatic clip to clip the cloth broadside to drive pneumatic clip through tight cloth motor and remove along cloth width direction, thereby realize the tensioning work of cloth, make the compress fixed process of cloth simple more, high-efficient.

Description

Embroidery machine tabouret with cloth tightening device

Technical Field

The utility model belongs to the technical field of the embroidery machine technique and specifically relates to an embroidery machine tabouret of tight cloth device in area is related to.

Background

The Chinese embroidery machine industry has been standardized since the beginning of the last ninety years and through the development of nearly thirty years. In recent years, the development of the ultra-multi-head and ultra-long type with greater difficulty is always carried out.

Chinese utility model patent with the publication number of CN208038747U discloses a novel tabouret device of a brain embroidery machine, comprising a tabouret driving frame and a tabouret, wherein the tabouret comprises a telescopic device, a clamping device, a driving device and a control device, the telescopic device comprises a first cylinder group and a second cylinder, the first cylinder group comprises a first upper cylinder and a first lower cylinder, the clamping device comprises a main clamping plate device and an auxiliary clamping plate device, two ends of the main clamping plate device are respectively and fixedly connected with the auxiliary clamping plate device through the first cylinder group, the main clamping plate device comprises a main moving bottom plate, a main supporting bottom plate and a main clamping plate, the main moving bottom plate is fixedly connected with the main supporting bottom plate, the first lower cylinder and the second cylinder are both fixedly arranged in the main supporting bottom plate, the first upper cylinder is fixedly arranged in the main clamping plate, a telescopic rod of the second cylinder is fixedly connected with the main clamping plate, the auxiliary clamping plate device comprises an auxiliary supporting bottom plate and an auxiliary clamping, first cylinder telescopic link and auxiliary splint fixed connection go up, first cylinder telescopic link and auxiliary supporting baseplate fixed connection down, drive arrangement includes lead screw and step motor, step motor and lead screw fixed connection, main bottom plate and lead screw nut fixed connection that removes, controlling means includes PLC controller and solenoid valve, PLC controller and solenoid valve and step motor electric signal connection.

Above-mentioned novel tabouret device drives main splint, auxiliary splint downstream through the flexible of second cylinder to clip the cloth, during the operation, the workman need pull the tabouret inboard with the edge of cloth earlier, highly aim at the space between main splint and main tributary fagging, auxiliary splint and the auxiliary backup pad with the cloth, then stretch into above-mentioned space with the edge of cloth, then press from both sides cloth starting the second cylinder. Simply put it simply is the granny rag earlier, then starts the cylinder and presss from both sides cloth, at granny rag and press from both sides between the cloth, the workman can be opened the cloth, and at this moment, the cloth takes place the shrink because of internal tension easily for the cloth edge breaks away from above-mentioned space position, when leading to the clamp plate to push down the cloth, the cloth is not in the state of leveling and tensioning, thereby influences and presss from both sides the cloth effect.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing an embroidery machine tabouret of tight cloth device in area strains the cloth before the cloth is pushed down to the clamp plate, when avoiding the staff to loosen, the cloth is because of inside tension shrink for when the compress cylinder promotes the clamp plate and pushes down the cloth, the cloth is in the horizontality, has guaranteed the compress effect.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: the utility model provides an embroidery machine tabouret of tight cloth device in area, includes fixed frame, clamp plate and compress cylinder, fixed frame includes rectangular frame and wide frame, be provided with broadside on the wide frame and press from both sides the cloth device, the clamp plate articulates on rectangular frame, the compress cylinder sets up on rectangular frame, the piston rod tip and the clamp plate of compress cylinder are connected and rotate in order to promote the clamp plate, be provided with tight cloth device on the rectangular frame, tight cloth device is including tight cloth cylinder and pneumatic clip, tight cloth cylinder sets up on rectangular frame and along rectangular frame length direction distribution, pneumatic clip sets up on the piston rod of tight cloth cylinder and sets up towards fixed frame.

By adopting the technical scheme, the broadside cloth clamping device clamps the broadside of the cloth, when the long side clamps the cloth, the pressing plate is in a turning-up state, the piston rod of the cloth tightening cylinder is in an extension state and the pneumatic clamp extends between the pressing plate and the long frame, then one long edge of the cloth is pulled into a clamping opening of the pneumatic clamp, the pneumatic clamp is controlled to be closed to clamp the cloth edge, then the piston rod of the cloth tightening cylinder contracts, the pneumatic clamp moves out of the range below the pressing plate along the width direction of the cloth, thereby tightening the cloth, then the piston rod of the cloth pressing cylinder is controlled to extend to push the pressing plate to turn over and press the cloth, so as to realize the cloth tightening and pressing on the long side of the cloth, the pneumatic clamp is used for clamping the cloth edge before cloth pressing, so that the cloth is prevented from shrinking due to internal tension when hands loosen, when the cloth pressing cylinder pushes the pressing plate to press the cloth, the cloth is in a flat state, and the cloth pressing effect is ensured.

The utility model discloses further set up to: the cloth tightening cylinder is a double-shaft parallel-bar cylinder, two pneumatic clamps of the cloth tightening device are arranged, the piston rod of the cloth tightening cylinder is provided with the same synchronous connecting plate, and the two pneumatic clamps are respectively arranged at two ends of the synchronous connecting plate.

Through adopting above-mentioned technical scheme, the piston rod of biax parallel bar cylinder has two, connects through the synchronous connection board between two for tight cloth cylinder during operation is more steady.

The utility model discloses further set up to: the surface of the pneumatic clamp contacted with the cloth surface is provided with anti-skid lines.

Through adopting above-mentioned technical scheme, the frictional force of antiskid line increase cloth cover and pneumatic clip for pneumatic clip can clip the cloth cover edge well.

Further setting the following steps: the pressing plate is hinged to the long frame through a connecting hinge, the cloth pressing cylinder is arranged on the long frame, a connecting rod is hinged to the end portion of a piston rod of the cloth pressing cylinder, and the other end of the connecting rod is hinged to the pressing plate.

Through adopting above-mentioned technical scheme, both ends through the connecting rod are articulated with compress cylinder and clamp plate for the compress cylinder can be fixed on long frame, can satisfy and promote clamp plate pivoted degree of freedom condition, has avoided promoting the rotation of in-process compress cylinder, and it is better to promote the effect.

Further setting the following steps: an inner threaded hole is formed in the end portion of a piston rod of the cloth pressing cylinder, an outer stud is connected in the inner threaded hole, and the piston rod of the cloth pressing cylinder is hinged to the connecting rod through the outer stud.

By adopting the technical scheme, the total length of the piston rod and the outer stud is adjusted by rotating the outer stud or the piston rod, so that the installation of the cloth pressing cylinder, the connecting rod and the pressing plate is adapted, the debugging can be carried out after the installation, and the installation is convenient to adjust.

Further setting the following steps: and the outer stud is in threaded connection with a locking nut, and the locking nut is tightly propped against the end part of the piston rod.

By adopting the technical scheme, the piston rod is tightly pressed by the locking nut through rotating the locking nut, and the acting force of the threads of the outer stud and the threads of the inner screw hole of the piston rod is increased, so that the outer stud is not easy to loosen.

Further setting the following steps: the long frame is provided with a fixing groove extending along the length direction of the long frame, and the fixing groove is internally provided with an upward convex strip which protrudes upwards and is circular in cross section along the length direction of the fixing groove.

Through adopting above-mentioned technical scheme, the clamp plate is contradicted with the fixed slot in order to push down cloth edge part under the cloth pressing cylinder drive, utilizes the sand grip to make the cloth walk around clamp plate bottom edge earlier and walk around the sand grip again, increases the point that compresses tightly, prevents that the cloth from contracting.

Further setting the following steps: the cloth pressing device is characterized in that a pressing strip is arranged at the bottom of the pressing plate and located on one side, back to the center of the cloth, of the convex strip, a plurality of pressing needles distributed along the length direction of the pressing strip are arranged on the pressing strip, flexible strips are arranged in the fixing grooves, when the pressing air cylinder pushes the pressing plate to rotate downwards, the pressing strip is attached to the flexible strips, and the pressing needles penetrate through the edges of the cloth and are inserted into the flexible strips.

Through adopting above-mentioned technical scheme, push down the cloth cover through the layering, recycle the tucking and pass the cloth and prick into and fix the fabric in the flexible strip for the fixing at cloth edge is more firm, and the tucking that can be convenient for is inserted to the flexible strip, contradicts mutually with the layering simultaneously and presss from both sides tight cloth, and is comparatively durable.

Further setting the following steps: the flexible strip is a foam adhesive tape.

Through adopting above-mentioned technical scheme, foam adhesive tape matter is light and soft, can make the tucking smoothly insert.

Further setting the following steps: the surface of the convex strip is provided with anti-slip convex ribs which are distributed along the circumferential direction of the convex strip and extend along the axial direction.

Through adopting above-mentioned technical scheme, support tightly through anti-skidding bead top and clamp plate, the cloth presss from both sides between anti-skidding bead and clamp plate, increases the steadiness that compresses tightly.

To sum up, the utility model discloses a beneficial technological effect does:

the cloth pressing cylinder drives the pneumatic clamp to move, the pneumatic clamp clamps the cloth edge to tension the cloth, so that when the cloth is pressed by the pressing plate, the cloth is in a tensioning state, workers do not need to hold the cloth edge all the time, and the smoothness and the tightness of the pressed cloth can be guaranteed;

the two ends of the connecting rod are respectively hinged with the outer stud and the pressing plate, so that when a piston rod of the air cylinder extends, the air cylinder does not need to rotate, the air cylinder can be fixed on the long frame, the installation is simple, the stability of the air cylinder is good, and the process that the air cylinder pushes the pressing plate to rotate is smoother;

when pressing cloth, the pressing needle penetrates through the cloth to fix the cloth in the horizontal direction, and the pressing cloth and the fixing effect are good.

Drawings

FIG. 1 is a schematic structural diagram of an embroidery frame of an embroidery machine with a cloth tightening device according to the present embodiment;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is an exploded view of the mounting structure of the cloth pressing cylinder, the connecting rod and the connecting hinge of the embroidery frame with the cloth tightening device in this embodiment;

FIG. 5 is an enlarged view at C of FIG. 4;

FIG. 6 is a schematic structural diagram of a pressing plate, a cloth pressing cylinder and a cloth tightening device of an embroidery machine tabouret with a cloth tightening device in the present embodiment;

fig. 7 is an enlarged view of fig. 6 at D.

Reference numerals: 1. a fixing frame; 11. a long frame; 12. a wide frame; 13. a cloth holding strip; 14. clamping the cloth; 2. pressing a plate; 21. a mounting seat; 22. a strut; 23. layering; 24. pressing the needle; 3. a cloth pressing cylinder; 31. an inner threaded hole; 32. an outer stud; 33. a lock nut; 34. a spanner boss; 4. a cloth tightening device; 41. a cloth tightening cylinder; 42. a pneumatic clamp; 43. anti-skid texture; 44. a synchronous connecting plate; 5. fixing grooves; 52. a flexible strip; 54. a convex strip; 55. anti-slip ribs; 6. connecting the hinge; 61. a moving plate; 62. fixing the sheet; 63. mounting holes; 64. synchronously closing the hinge; 7. a connecting rod; 71. a side plate; 72. a connecting plate; 73. a first pin hole; 731. a first pin shaft; 74. a second pin hole; 741. a second pin shaft; 75. a first clamp spring; 76. a second clamp spring; 77. a first hinge loop; 78. a second hinge loop.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, an embroidery machine tabouret with a cloth tightening device comprises a fixing frame 1, a pressing plate 2 and a cloth pressing cylinder 3, wherein the fixing frame 1 comprises a wide frame 12 and a long frame 11.

As shown in fig. 1 and 3, the wide frame 12 is provided with a wide-edge cloth clamping device, the wide-edge cloth clamping device includes a cloth clamping strip 13 fixed on the wide frame and extending along the width direction of the long frame 11 and a cloth clamp 14 clamped on the cloth clamping strip 13, one end edge of the cloth bypasses the cloth clamping strip 13 and is clamped on the cloth clamping strip 13 through the cloth clamp 14, and the width range of the cloth is generally between 1 and 2 meters, so that 2 to 3 cloth clamps 14 are provided.

As shown in fig. 1 and 2, the long frame 11 is provided with a cloth tightening device 4, which comprises a cloth tightening cylinder 41 and a pneumatic clamp 42,

as shown in fig. 2, the cloth fastening cylinders 41 are disposed on the long frame 11 and distributed along the length direction of the long frame 11, and the pneumatic clamps 42 are mounted on the piston rods of the cloth fastening cylinders 41 and disposed toward the fixed frame 1.

The cloth tightening cylinder 41 is a double-shaft parallel-bar cylinder, two piston rods of the cloth tightening cylinder 41 are connected with a synchronous push plate 44, and two pneumatic clamps 42 of each cloth tightening device 4 are arranged at two ends of the synchronous push plate 44 respectively. The surface of the pneumatic clamp 42 contacting with the cloth surface is provided with anti-slip lines 43.

As shown in fig. 1, the plurality of cloth pressing cylinders 3 are fixed to the long frame 11, and the plurality of cloth pressing cylinders 3 are distributed along the length direction of the long frame 11.

As shown in fig. 3, the fixing groove 5 extending along the length direction of the long frame 11 is formed on the surface of the long frame 11, which is located on the surface of the cloth pressing cylinder 3 facing the center of the cloth.

As shown in fig. 2 and 4, the pressing plate 2 is hinged to the long frame 11 through a connecting hinge 6 and is located on one side of the cloth pressing cylinder 3 facing the center of the cloth and above the fixing groove 5. When the pressing plate 2 is turned over, a piston rod for tightly tightening the cloth cylinder 41, a synchronous connecting plate 44 and a pneumatic clamp 42 are arranged between the part of the pressing plate 2 far away from the inside of the fixed frame 1 and the long frame 11 and extend into a gap between the pressing plate 2 and the fixed groove 5.

The movable piece 61 of the connecting hinge 6 is fixedly connected with the surface of the pressing plate 2 back to the fixed groove 5, and the fixed piece 62 is fixedly connected with the long frame 11 of the long frame 11. The moving plate 61 is provided with a mounting hole 63, a mounting seat 21 is embedded in the mounting hole 63, the mounting seat 21 is fixed on the pressing plate 2 through a bolt, and a supporting rod 22 is fixed on the mounting seat 21.

As shown in fig. 4, an inner threaded hole 31 is formed at the end of the piston rod of the cloth pressing cylinder 3, an outer stud 32 is connected to the inner threaded hole 31 in a threaded manner, a lock nut 33 is connected to the outer stud 32 in a threaded manner, the lock nut 33 is located between the piston rod of the cloth pressing cylinder 3 and the head of the outer stud 32, and the lock nut 33 abuts against the end of the piston rod of the cloth pressing cylinder 3. The end of the piston rod of the cloth pressing cylinder 3 is provided with a spanner boss 34, so that a spanner can be conveniently used to be matched with the spanner boss 34 to rotate the piston rod of the cloth pressing cylinder 3, and the total length of the piston rod of the cloth pressing cylinder and the outer screw column 32 can be changed.

The head of the outer stud 32, which faces away from the cloth pressing cylinder 3, is fixed with a first hinge ring 77, and is hinged with a connecting rod 7 through the first hinge ring 77.

As shown in fig. 5, the connecting rod 7 is i-shaped and includes two side plates 71 and a connecting plate 72 connecting the two side plates 71, one end of the two side plates 71 close to the cloth pressing cylinder 3 is provided with a first pin hole 73, one end of the two side plates 71 far away from the cloth pressing cylinder 3 is provided with a second pin hole 74, two first pin holes 73 penetrate through the same first pin shaft 731 and are fixed through a first snap spring 75, two second pin holes 74 penetrate through the same second pin shaft 741 and are fixedly connected through a second snap spring 76, the first pin shaft 731 is sleeved with a first hinge ring 77, a second hinge ring 78 is sleeved on the second pin shaft 741 at a position between the two side plates 71, and the second hinge ring 78 is fixed on the supporting rod 22.

As shown in fig. 3 and 6, an upward protruding convex strip 54 is integrally provided in the fixing groove 5, the cross section of the convex strip 54 along the length direction of the fixing groove 5 is circular, and the surface of the convex strip 54 is provided with anti-slip convex ribs 55 extending in the axial direction along the circumferential direction of the convex strip 54.

As shown in fig. 6 and 7, a pressing strip 23 is fixed at the bottom of the pressing plate 2, the pressing strip 23 is located on one side of the protruding strip 54 opposite to the center of the cloth, a plurality of pressing pins 24 distributed along the length direction of the pressing strip 23 are arranged on the pressing strip 23, a flexible strip 52 is arranged in the fixing groove 5, the flexible strip 52 is a foam adhesive tape, when the pressing plate 2 is pushed by the cloth pressing cylinder 3 to rotate downwards, the pressing strip 23 is attached to the flexible strip 52, and the pressing pins 24 penetrate through the edge of the cloth and are inserted into the flexible strip 52.

The use principle is as follows:

initially, the piston rod of the cloth pressing cylinder 3 is in a contracted state, so that the pressing plate 2 is in a turned-up state, and the cloth clamp 14 is in a taken-down state.

When the cloth clamping device is used, one wide edge of cloth is placed on the cloth clamping strip 13, the cloth clamp 14 is manually pressed on the cloth clamping strip 13, and the wide edge of the cloth is fixed through the cloth clamp 14 and the cloth clamping strip 13. And the other broadside of the cloth is fixed in the same way.

When the long side of the cloth is fixed, the pressing plate 2 is in a turned-up state, the piston rod of the cloth tightening cylinder 41 is in an extended state so that the pneumatic clamp 42 is positioned between the pressing plate 2 and the fixing groove 5, and the pneumatic clamp 42 is in an open state.

The long edge of the cloth is manually straightened, the long edge of the cloth enters a clamping opening of the pneumatic clamp 42, the pneumatic clamp 42 is controlled to clamp tightly, then the piston rod of the cloth pressing cylinder 41 contracts to drive the pneumatic clamp 42 to move along the direction of the width direction of the cloth far away from the center of the cloth and move out of the position below the pressing plate 2, the cloth is tensioned in the width direction in the process, then the piston rod of the cloth pressing cylinder 3 extends to push the pressing plate 2 to rotate reversely, the cloth is pressed on the flexible strip 52, and in the pressing process, the pressing needle 24 is inserted into the flexible strip 52.

At this time, the cloth sequentially passes through the space between the pressing plate 2 and the convex strip 54 and the space between the lower part of the pressing plate 2 and the flexible strip 52 along the width direction of the cloth, and then passes through the fixing groove 5 to be clamped by the pneumatic clamp 42, so that the cloth tightening and pressing process of one long edge of the cloth is completed.

And then the other long edge of the cloth is pressed and fixed according to the operation.

Then, the embroidery machine head is used for embroidering the cloth in the fixed frame 1.

After the embroidery is finished, starting the cloth pressing cylinder 3, enabling a piston rod of the cloth pressing cylinder 3 to contract, pulling the connecting rod 7 to move and driving the pressing plate 2 to turn up, and enabling the pressing needle 24 to be separated from the flexible strip 52 and loosen the cloth; the piston rod of the cloth tightening cylinder 41 is controlled to extend, the pneumatic clamp 42 extends into the position between the pressing plate 2 and the fixing groove 5 through the gap between the pressing plate 2 and the fixing groove 5, and then the pneumatic clamp 42 releases the long edge of the cloth.

At the moment, the width of the cloth is almost the same as the actual width of the cloth, and the cloth is in a natural spreading state, so that the long edge of the cloth is still in the clamping range of the clamping opening.

The cloth clamp 14 in the width direction of the cloth is loosened, and then the cloth is pulled in the length direction of the cloth to change the width, so that the part to be embroidered enters the fixing frame 1. And then repeating the processes of clamping the wide edges, tightening the long edges and pressing the cloth to remember to finish the fixing work of the new cloth, and carrying out the embroidering work of the second width. And (4) sequentially analogizing the follow-up embroidering until the whole cloth is embroidered, loosening the wide edge and the long edge of the cloth, and taking down the cloth.

The cloth pressing clamp 14 on the wide side and the long side of the cloth can have the following cloth sequence: the cloth clamping process includes the steps of clamping cloth on one wide edge, clamping cloth on two wide edges simultaneously, clamping cloth on two wide edges and two long edges simultaneously, tightening cloth on the opposite long edges, and clamping cloth on the wide edges.

After the compress cylinder 3, the connecting rod 7 and the connecting hinge 6 are all installed, the total length of the piston rod and the outer bolt 32 can be adjusted by utilizing the rotation of the piston rod, so that the installation and debugging are convenient, the piston rod is fixed without rotating in work by screwing the locking nut 33, and the total length of the piston rod and the outer bolt 32 of the compress cylinder 3 is kept unchanged in use.

After the cloth pressing cylinder 3 pushes the pressing plate 2 to rotate, the pressing needle 24 at the bottom of the pressing plate 2 is inserted into the flexible strip 52 to advance and fix the cloth, so that the fixation is more stable.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (10)

1. The utility model provides an embroidery machine tabouret of tight cloth device in area, includes fixed frame (1), clamp plate (2) and compress cylinder (3), fixed frame (1) is including long frame (11) and wide frame (12), be provided with broadside on wide frame (12) and press from both sides the cloth device, clamp plate (2) articulate on long frame (11), compress cylinder (3) set up on long frame (11), the tailpiece of the piston rod portion of compress cylinder (3) is connected with clamp plate (2) and rotates its characterized in that in order to promote clamp plate (2): be provided with tight cloth device (4) on long frame (11), tight cloth device (4) are including tight cloth cylinder (41) and pneumatic clip (42), tight cloth cylinder (41) set up on long frame (11) and distribute along long frame (11) length direction, pneumatic clip (42) set up on the piston rod of tight cloth cylinder (41) and set up towards fixed frame (1).

2. The embroidery machine tabouret with cloth tightening device according to claim 1, characterized in that: the cloth tightening cylinder (41) is a double-shaft parallel-bar cylinder, a piston rod of the cloth tightening cylinder (41) is provided with the same synchronous connecting plate (44), and the pneumatic clamps (42) are respectively arranged at two ends of the synchronous connecting plate (44).

3. The embroidery machine tabouret with cloth tightening device according to claim 1, characterized in that: the surface of the pneumatic clamp (42) contacted with the cloth surface is provided with anti-skid grains (43).

4. The embroidery machine tabouret with cloth tightening device according to claim 1 or 3, characterized in that: the pressing plate (2) is hinged to the long frame (11) through a connecting hinge (6), the cloth pressing cylinder (3) is arranged on the long frame (11), the end part of a piston rod of the cloth pressing cylinder (3) is hinged to a connecting rod (7), and the other end of the connecting rod (7) is hinged to the pressing plate (2).

5. The embroidery machine tabouret with cloth tightening device according to claim 4, characterized in that: an inner threaded hole (31) is formed in the end portion of a piston rod of the cloth pressing cylinder (3), an outer stud (32) is connected into the inner threaded hole (31), and a piston rod of the cloth pressing cylinder (3) is hinged to the connecting rod (7) through the outer stud (32).

6. The embroidery machine tabouret with cloth tightening device according to claim 5, characterized in that: and the outer stud (32) is connected with a lock nut (33) in a threaded manner, and the lock nut (33) is tightly propped against the end part of the piston rod.

7. The embroidery machine tabouret with cloth tightening device according to claim 1, characterized in that: the long frame (11) is provided with a fixing groove (5) extending along the length direction of the long frame (11), and the fixing groove (5) is internally provided with a convex strip (54) which protrudes upwards and has a circular cross section along the length direction of the fixing groove (5).

8. The embroidery machine tabouret with cloth tightening device according to claim 7, characterized in that: pressing plate (2) bottom is provided with layering (23), layering (23) are located sand grip (54) one side to the cloth center back, be equipped with a plurality of tucks (24) that distribute along layering (23) length direction on layering (23), be provided with flexible strip (52) in fixed slot (5), when compress cylinder (3) promoted pressing plate (2) and rotate downwards, layering (23) and flexible strip (52) laminating, tuck (24) pierce through the cloth edge and insert in flexible strip (52).

9. The embroidery machine tabouret with cloth tightening device according to claim 8, characterized in that: the flexible strip (52) is a foam rubber strip.

10. The embroidery machine tabouret with cloth tightening device according to claim 7, characterized in that: the surface of the convex strip (54) is provided with anti-slip convex ribs (55) which are distributed along the circumferential direction of the convex strip (54) and extend along the axial direction.

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