A cloth winding and cutting device for warp knitting machine

Abstract

The present invention belongs to the technical field of fabric production, and in particular, is a cloth winding and cutting device for a warp knitting machine, comprising a bottom plate, a table plate fixed on the top of the bottom plate, a knife opening in the middle of the top of the table plate, a multi-leaf blade for cutting cloth is arranged in the knife opening, the blade of the multi-leaf blade is arc-shaped, a pair of first shaft seats are fixed on the top inner wall of the table plate, a same main shaft is rotatably connected between the two first shaft seats, a first motor is fixed on the top inner wall of the table plate, the output shaft of the first motor is fixedly connected to a first gear, the end of the main shaft is fixedly connected to a second gear meshing with the first gear, and a winding assembly is arranged at the discharge end of the table plate. In the present invention, by driving the multi-leaf blade to rotate, the rotating blade of the multi-leaf blade will cooperate with the edge of the knife opening to shear the cloth, so as to achieve the effect of cutting, so that the incision will be more neat.

Description

Technical Field

[0001] The invention relates to the technical field of fabric production, and in particular to a fabric winding and cutting device for a warp knitting machine. Background Art

[0002] The warp knitting machine uses one or several groups of parallel arranged yarns to feed the warp into all the working needles of the machine at the same time to form a knitted fabric. This method is called warp knitting, and the fabric obtained by warp knitting is called warp knitted fabric.

[0003] In order to obtain warp knitted fabrics of the desired width, the warp knitted fabrics need to be cut. The existing method is to set a fixed blade, and then the fabric is cut when it moves to the blade position when the fabric is rolled up, so as to achieve the cutting effect. This method requires the blade to be very sharp. If the blade is slightly dull, the blade will exert a greater force on the fabric and cause an uneven cut. Therefore, corresponding improvements are made to address this problem. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a cloth winding and cutting device for a warp knitting machine.

[0005] The present invention proposes a cloth winding and cutting device for a warp knitting machine, comprising a bottom plate, a table plate is fixed on the top of the bottom plate, a knife opening is opened in the middle of the top of the table plate, a multi-leaf blade for cutting cloth is arranged in the knife opening, the blade of the multi-leaf blade is arc-shaped, a pair of first shaft seats are fixed on the top inner wall of the table plate, a same main shaft is rotatably connected between the two first shaft seats, a first motor is fixed on the top inner wall of the table plate, the output shaft of the first motor is fixedly connected to a first gear, the end of the main shaft is fixedly connected to a second gear meshing with the first gear, and a winding assembly is arranged at the discharge end of the table plate; the cloth to be wound is firstly A cut is made at the end of the rolled cloth according to the required size, and then the free ends of the two sections of cloth are fixed to the winding assembly respectively, and then the cloth is laid flat on the table so that the multi-page blade is just located at the end of the cut, and then the first motor and the winding assembly are started, the output shaft of the first motor drives the first gear to rotate, and then the first gear will engage the second gear to drive the main shaft to rotate, and the main shaft will synchronously drive the multi-page blade to rotate, and the rotating blade of the multi-page blade will cooperate with the edge of the knife edge to shear the cloth to achieve the cutting effect. At the same time, the winding assembly will continue to roll up the two sections of cloth respectively.

[0006] Preferably, the winding assembly includes a first horizontal plate and a second horizontal plate fixed on the table plate and distributed up and down, and the first horizontal plate and the second horizontal plate are respectively rotatably connected with the first and second rods of different lengths, and the first and second rods are respectively provided with retaining rings, and the first and second rods are respectively sleeved with reels, and the ends of the first and second rods are respectively threadedly connected with screw sleeves for tightening the reel, and the first and second rods are connected by a synchronization assembly; the synchronization assembly will drive the first and second horizontal plates to rotate at the same time, and then the first and second horizontal plates will respectively drive the corresponding reels to rotate, so that the two sections of cloth can be rolled up separately. After the winding is completed, you only need to unscrew the screw sleeve, and then you can take out the reel, replace it with a new reel, and continue to work.

[0007] Preferably, the synchronization component includes two first synchronization wheels which are respectively fixedly mounted on the same end of the first plunger and the second plunger, the two first synchronization wheels are connected by a first synchronization belt, a second motor is fixed to the side of the first cross plate, and the output shaft of the second motor is fixedly connected to the end of the first plunger; after starting the second motor, the output shaft of the second motor drives the first plunger to rotate, and then the first plunger will synchronously drive the second plunger to rotate through the transmission cooperation of the first synchronization wheel and the first synchronization belt.

[0008] Preferably, a pair of slide rails are fixed on the top of the table, and a slider that can move laterally is elastically connected in the slide rails, and a cross column that can move up and down is commonly connected between the two sliders, and two pressure plates for pressing on the cloth are fixedly sleeved on the cross column, and the two pressure plates are symmetrically distributed on both sides of the knife edge, and a pair of multi-page discs with the same shape as the multi-page blade but without blades are fixedly sleeved on the main shaft, and the cross column can abut against the arc surface of the multi-page disc; when arranging the cloth, the cross column and the pressure plate are lifted upward, so that a gap is formed between the pressure plate and the table, and then the cloth is passed through the gap, and the pressure plate is lowered so that it is pressed on the cloth, and when the main shaft rotates, it will synchronously drive the multi-page disc to rotate. The curved surface of the multi-leaf disc will push the cross column, and then the cross column and the pressure plate will follow the slider to move along the direction of the slide rail toward the feed end of the table, and the force exerted by the curved surface of the multi-leaf disc on the cross column has a downward component of the vertical table, so that the pressure plate will press on the cloth and move, thereby smoothing the cloth, thereby avoiding uneven cutting of the cloth, and achieving the effect of synchronously pressing the cloth downward when cutting, thereby avoiding the multi-leaf blade dragging the cloth when cutting the cloth and causing uneven incisions. When the curved surface is out of contact with the cross column, the slider will reset under the action of elastic force, and the pressure plate will cancel the pressure on the cloth during the reset process, which is convenient for the cloth to be rolled up.

[0009] Preferably, the slider is slidably connected to the slide rail, and a first spring is fixed to one end of the slider, and the other end of the first spring is fixedly connected to the inner wall of the slide rail; in this way, the slider can be pushed to reset by the elastic force of the first spring.

[0010] Preferably, the sliding block is provided with a sliding opening for the cross column to move up and down; thus, the cross column and the pressure plate can move up and down in the sliding opening.

[0011] Preferably, a pair of circular holes are opened on the cross column, and a guide column whose bottom end contacts the top surface of the table plate is slidably connected in the circular holes, and a second spring is sleeved on the guide column, and the two ends of the second spring are respectively fixedly connected to the cross column and the guide column; under normal conditions, the elastic force of the second spring can be used to form an elastic support for the cross column, so that the gravity of the pressure plate does not act on the cloth, so that when the cross column follows the slider to reset, the cloth will not be subjected to pressure, thereby achieving a better cloth winding effect.

[0012] Preferably, a fixed seat is fixed through the top of the table, a roller is rotatably connected to the fixed seat, a plurality of rubber strips that can contact the cloth and are distributed in a circular array are fixed to the circumferential outer wall of the roller, and the roller is connected to a transmission component; when winding, the transmission component will drive the roller to rotate in the opposite direction to the multi-leaf blade, and then the roller will smooth the cloth backwards through the rubber strip, so that the feeding direction of the cloth is not skewed.

[0013] Preferably, the transmission assembly includes a pair of second synchronous wheels and a pair of third synchronous wheels, the pair of second synchronous wheels are connected by a second synchronous belt, the pair of third synchronous wheels are connected by a third synchronous belt, a shaft column located below the table is rotatably connected to the fixed seat, a pair of third synchronous wheels are respectively mounted on the shaft column and the output shaft of the first motor, and a pair of second synchronous wheels are respectively mounted on the roller shaft and the shaft column; when the output shaft of the first motor rotates, the shaft column will be driven to rotate through the transmission cooperation of the third synchronous wheel and the third synchronous belt, and then the shaft column will drive the roller shaft to rotate through the transmission cooperation of the second synchronous wheel and the second synchronous belt, so that the roller shaft rotates in the opposite direction to the multi-page blade.

[0014] Compared with the prior art, the present invention provides a cloth winding and cutting device for a warp knitting machine, which has the following beneficial effects:

[0015] 1. A cloth winding and cutting device for a warp knitting machine, by setting a multi-page blade, the first motor output shaft drives the first gear to rotate, and then the first gear will mesh with the second gear to drive the main shaft to rotate, and the main shaft will synchronously drive the multi-page blade to rotate, and the rotating blade of the multi-page blade will cooperate with the edge of the knife edge to shear the cloth to achieve the cutting effect, so that the incision will be more neat.

[0016] 2. A cloth winding and cutting device for a warp knitting machine, by setting a pressure plate, when cutting, the arc surface of the multi-leaf disc will push the pressure plate to press on the cloth and move, so as to smooth the cloth, thereby avoiding uneven cloth when cutting, and achieving the effect of pressing the cloth downward synchronously when cutting, thereby avoiding uneven incision caused by the multi-leaf blade dragging the cloth when cutting the cloth, when the arc surface is out of contact with the horizontal column, the pressure plate will cancel the pressure on the cloth, which is convenient for the cloth to be wound up.

[0017] 3. A cloth winding and cutting device for a warp knitting machine, by setting a second spring, under normal conditions, the elastic force of the second spring can be used to form an elastic support for the cross column, so that the gravity of the pressure plate does not act on the cloth, so that when the cross column follows the slider to reset, the cloth will not be subjected to pressure, thereby achieving a better cloth winding effect.

[0018] 4. A cloth winding and cutting device for a warp knitting machine, by setting a rubber strip, when winding, the transmission component will drive the roller to rotate in the opposite direction of the multi-leaf blade, and then the roller will smooth the cloth backwards through the rubber strip, so that the feeding direction of the cloth is not skewed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the first angle structure of a cloth winding and cutting device for a warp knitting machine proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the structure at a second angle of a cloth winding and cutting device for a warp knitting machine proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the bottom structure of a table of a cloth winding and cutting device for a warp knitting machine proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of a multi-blade installation structure of a cloth winding and cutting device for a warp knitting machine proposed by the present invention;

[0023] Figure 5 For the present invention Figure 3 A schematic diagram of the enlarged structure at point A;

[0024] Figure 6 This is a schematic diagram of a reel installation structure of a fabric winding and cutting device for a warp knitting machine proposed by the present invention;

[0025] Figure 7 For the present invention Figure 2 A schematic diagram of the enlarged structure at B;

[0026] Figure 8A schematic diagram of the installation structure between a crossbar and a slide rail of a fabric winding and cutting device for a warp knitting machine proposed by the present invention;

[0027] Fig. 9 For the present invention Figure 8 A schematic diagram of the enlarged structure at C;

[0028] Fig.10 This is a schematic diagram of a second spring installation structure of a cloth winding and cutting device for a warp knitting machine proposed by the present invention;

[0029] Fig.11 For the present invention Figure 2 Enlarged structural diagram at D.

[0030] In the figure: 1, bottom plate; 2, table plate; 3, knife edge; 4, multi-leaf blade; 5, first shaft seat; 6, main shaft; 7, first motor; 8, first gear; 9, second gear; 10, first horizontal plate; 11, second horizontal plate; 12, first plunger; 13, second plunger; 14, retaining ring; 15, reel; 16, screw sleeve; 17, second motor; 18, first synchronous wheel; 19, first synchronous belt; 20, pressure plate; 21, multi-leaf disk; 22, horizontal column; 23, slide rail; 24, slider; 25, slide mouth; 26, first spring; 27, guide column; 28, round hole; 29, second spring; 30, fixed seat; 31, roller; 32, rubber strip; 33, shaft column; 34, second synchronous wheel; 35, second synchronous belt; 36, third synchronous wheel; 37, third synchronous belt. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] Reference Figure 1-Figure 11, a cloth winding and cutting device for a warp knitting machine, comprising a bottom plate 1, a table plate 2 is fixed on the top of the bottom plate 1, a knife opening 3 is opened in the middle position of the top of the table plate 2, a multi-leaf blade 4 for cutting cloth is arranged in the knife opening 3, the blade part of the multi-leaf blade 4 is arc-shaped, a pair of first shaft seats 5 are fixed on the top inner wall of the table plate 2, a same main shaft 6 is rotatably connected between the two first shaft seats 5, a first motor 7 is fixed on the top inner wall of the table plate 2, an output shaft of the first motor 7 is fixedly connected to a first gear 8, an end of the main shaft 6 is fixedly connected to a second gear 9 meshing with the first gear 8, and a winding component is arranged at the discharge end of the table plate 2;

[0034] During operation, first make an incision at the end of the cloth to be rolled up according to the required size, then fix the free ends of the two sections of cloth to the rolling assembly respectively, and then lay the cloth flat on the table 2 so that the multi-page blade 4 is just located at the end of the incision, then start the first motor 7 and the rolling assembly, the output shaft of the first motor 7 drives the first gear 8 to rotate, and then the first gear 8 will engage the second gear 9 to drive the main shaft 6 to rotate, and the main shaft 6 will synchronously drive the multi-page blade 4 to rotate, and the rotating blade of the multi-page blade 4 will cooperate with the edge of the knife edge 3 to shear the cloth to achieve the cutting effect, and at the same time, the rolling assembly will continue to roll up the two sections of cloth respectively.

[0035] The winding assembly includes a first horizontal plate 10 and a second horizontal plate 11 fixed on the table 2 and distributed up and down, and the first horizontal plate 10 and the second horizontal plate 11 are respectively rotatably connected with a first plunger 12 and a second plunger 13 of different lengths, and the first plunger 12 and the second plunger 13 are respectively provided with a retaining ring 14, and the first plunger 12 and the second plunger 13 are respectively sleeved with a reel 15, and the ends of the first plunger 12 and the second plunger 13 are respectively threadedly connected with a screw sleeve 16 for tightening the reel 15, and the first plunger 12 and the second plunger 13 are connected by a synchronization assembly;

[0036] During operation, the synchronization component drives the first horizontal plate 10 and the second horizontal plate 11 to rotate simultaneously, and then the first horizontal plate 10 and the second horizontal plate 11 will respectively drive the corresponding reels 15 to rotate, so that the two sections of cloth can be rolled up respectively. After the rolling is completed, only the screw sleeve 16 needs to be unscrewed, and then the reel 15 can be taken out, and a new reel 15 can be replaced to continue working.

[0037] The synchronization assembly includes two first synchronization wheels 18 respectively fixedly sleeved on the same end of the first plunger 12 and the second plunger 13, the two first synchronization wheels 18 are connected by a first synchronization belt 19, a second motor 17 is fixed to the side of the first horizontal plate 10, and the output shaft of the second motor 17 is fixedly connected to the end of the first plunger 12;

[0038] During operation, after the second motor 17 is started, the output shaft of the second motor 17 drives the first plunger 12 to rotate, and then the first plunger 12 will synchronously drive the second plunger 13 to rotate through the transmission cooperation of the first synchronous wheel 18 and the first synchronous belt 19.

[0039] Furthermore, a pair of slide rails 23 are fixed on the top of the table 2, and a slider 24 capable of lateral movement is elastically connected in the slide rails 23, and a horizontal column 22 capable of upward and downward movement is commonly connected between the two sliders 24, and two pressing plates 20 for pressing on the cloth are fixedly sleeved on the horizontal column 22, and the two pressing plates 20 are symmetrically distributed on both sides of the knife-mounting edge 3, and a pair of multi-leaf discs 21 having the same shape as the multi-leaf blade 4 but without blades are fixedly sleeved on the main shaft 6, and the horizontal column 22 can abut against the arc surface of the multi-leaf disc 21;

[0040] During operation, when arranging the fabric, the cross column 22 and the pressing plate 20 are lifted upward, so that a gap is formed between the pressing plate 20 and the table 2, and then the fabric passes through the gap, and after the pressing plate 20 is lowered, the pressing plate 20 will press on the fabric, and when the spindle 6 rotates, it will synchronously drive the multi-page disc 21 to rotate, and the arc surface of the multi-page disc 21 will push the cross column 22, and then the cross column 22 and the pressing plate 20 will follow the slider 24 and move along the direction of the slide rail 23 toward the feeding end of the table 2, and the arc surface of the multi-page disc 21 faces the cross column 22. The force applied by the column 22 has a downward component perpendicular to the table 2, so that the pressing plate 20 will press on the cloth and move, thereby smoothing the cloth, thereby avoiding uneven cutting of the cloth, and achieving the effect of synchronously pressing the cloth downward when cutting, thereby avoiding the multi-leaf blade 4 dragging the cloth when cutting the cloth and causing uneven incisions. When the arc surface is out of contact with the horizontal column 22, the slider 24 will be reset under the action of elastic force. During the reset process, the pressing plate 20 will cancel the pressure on the cloth, which facilitates the winding of the cloth.

[0041] The slider 24 is slidably connected to the slide rail 23, and a first spring 26 is fixed to one end of the slider 24, and the other end of the first spring 26 is fixedly connected to the inner wall of the slide rail 23;

[0042] During operation, the slide block 24 can be pushed back to its original position by the elastic force of the first spring 26 .

[0043] The slider 24 is provided with a sliding opening 25 for the horizontal column 22 to move up and down;

[0044] During operation, the crossbar 22 and the pressing plate 20 can move up and down in the sliding opening 25 .

[0045] Furthermore, a pair of circular holes 28 are formed on the horizontal column 22, and a guide column 27 whose bottom end contacts the top surface of the table 2 is slidably connected in the circular hole 28, and a second spring 29 is sleeved on the guide column 27, and the two ends of the second spring 29 are fixedly connected to the horizontal column 22 and the guide column 27 respectively;

[0046] Under normal conditions, the elastic force of the second spring 29 can be used to form an elastic support for the cross column 22, so that the gravity of the pressure plate 20 does not act on the cloth. In this way, when the cross column 22 follows the slider 24 to reset, the cloth will not be subjected to pressure, thereby achieving a better cloth winding effect.

[0047] Furthermore, a fixing seat 30 is fixed through the top of the table 2, and a roller 31 is rotatably connected to the fixing seat 30. A plurality of rubber strips 32 that can contact the fabric and are distributed in an annular array are fixed to the outer wall of the roller 31, and a transmission assembly is connected to the roller 31.

[0048] When winding, the transmission assembly will drive the roller 31 to rotate in the opposite direction to the multi-leaf blade 4, and then the roller 31 will smooth the cloth backward through the rubber strip 32, so that the feeding direction of the cloth is not skewed.

[0049] The transmission assembly includes a pair of second synchronous wheels 34 and a pair of third synchronous wheels 36. The pair of second synchronous wheels 34 are connected by a second synchronous belt 35, and the pair of third synchronous wheels 36 are connected by a third synchronous belt 37. The fixed seat 30 is rotatably connected with a shaft column 33 located below the table 2. The pair of third synchronous wheels 36 are respectively mounted on the shaft column 33 and the output shaft of the first motor 7, and the pair of second synchronous wheels 34 are respectively mounted on the roller shaft 31 and the shaft column 33.

[0050] During operation, when the output shaft of the first motor 7 rotates, the shaft column 33 will be driven to rotate through the transmission cooperation of the third synchronous wheel 36 and the third synchronous belt 37, and then the shaft column 33 will drive the roller shaft 31 to rotate through the transmission cooperation of the second synchronous wheel 34 and the second synchronous belt 35, so that the roller shaft 31 rotates in the opposite direction to the multi-leaf blade 4.

[0051] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cloth winding and cutting device for a warp knitting machine, comprising a bottom plate (1), characterized in that: A table (2) is fixed on the top of the bottom plate (1), a knife opening (3) is provided in the middle of the top of the table (2), a multi-leaf blade (4) for cutting cloth is arranged in the knife opening (3), the blade of the multi-leaf blade (4) is arc-shaped, a pair of first shaft seats (5) are fixed on the top inner wall of the table (2), a main shaft (6) is rotatably connected between the two first shaft seats (5), a first motor (7) is fixed on the top inner wall of the table (2), an output shaft of the first motor (7) is fixedly connected to a first gear (8), an end of the main shaft (6) is fixedly connected to a second gear (9) meshing with the first gear (8), and a winding assembly is arranged at the discharge end of the table (2); A pair of slide rails (23) are fixed on the top of the table (2), a slider (24) capable of laterally moving is elastically connected inside the slide rails (23), a horizontal column (22) capable of upward and downward movement is commonly connected between the two sliders (24), two pressing plates (20) for pressing on the cloth are fixedly sleeved on the horizontal column (22), the two pressing plates (20) are symmetrically distributed on both sides of the blade mounting edge (3), a pair of multi-leaf discs (21) having the same shape as the multi-leaf blade (4) but without blades are fixedly sleeved on the main shaft (6), and the horizontal column (22) can abut against the arc surface of the multi-leaf disc (21).

2. A cloth winding and cutting device for a warp knitting machine according to claim 1, characterized in that: The winding assembly comprises a first horizontal plate (10) and a second horizontal plate (11) which are fixed on a table (2) and are arranged in an upper and lower arrangement. The first horizontal plate (10) and the second horizontal plate (11) are respectively rotatably connected with a first plunger (12) and a second plunger (13) of different lengths. The first plunger (12) and the second plunger (13) are respectively provided with a retaining ring (14). The first plunger (12) and the second plunger (13) are respectively sleeved with a reel (15). Furthermore, the ends of the first plunger (12) and the second plunger (13) are respectively threadedly connected with a screw sleeve (16) for tightening the reel (15). The first plunger (12) and the second plunger (13) are connected via a synchronous assembly.

3. The cloth winding and cutting device for a warp knitting machine according to claim 2, characterized in that: The synchronization component comprises two first synchronization wheels (18) respectively fixedly mounted on the same end of the first plunger (12) and the second plunger (13), the two first synchronization wheels (18) being connected via a first synchronization belt (19), a second motor (17) being fixed to the side of the first transverse plate (10), and an output shaft of the second motor (17) being fixedly connected to the end of the first plunger (12).

4. The cloth winding and cutting device for a warp knitting machine according to claim 1, characterized in that: The slider (24) is slidably connected to the slide rail (23), and a first spring (26) is fixed to one end of the slider (24), while the other end of the first spring (26) is fixedly connected to the inner wall of the slide rail (23).

5. The cloth winding and cutting device for a warp knitting machine according to claim 1, characterized in that: The slide block (24) is provided with a sliding opening (25) for the horizontal column (22) to move up and down.

6. The cloth winding and cutting device for a warp knitting machine according to claim 1, characterized in that: The transverse column (22) is provided with a pair of circular holes (28), a guide column (27) whose bottom end contacts the top surface of the table plate (2) is slidably connected in the circular hole (28), a second spring (29) is sleeved on the guide column (27), and two ends of the second spring (29) are respectively fixedly connected to the transverse column (22) and the guide column (27).

7. The cloth winding and cutting device for a warp knitting machine according to claim 1, characterized in that: A fixing seat (30) is fixedly passed through the top of the table (2), a roller (31) is rotatably connected to the fixing seat (30), a plurality of rubber strips (32) capable of contacting the cloth and distributed in an annular array are fixed to the circumferential outer wall of the roller (31), and the roller (31) is connected to a transmission assembly.

8. The cloth winding and cutting device for a warp knitting machine according to claim 7, characterized in that: The transmission assembly comprises a pair of second synchronous wheels (34) and a pair of third synchronous wheels (36), the pair of second synchronous wheels (34) are connected by a second synchronous belt (35), the pair of third synchronous wheels (36) are connected by a third synchronous belt (37), a shaft column (33) located below the table (2) is rotatably connected to the fixed seat (30), the pair of third synchronous wheels (36) are respectively mounted on the shaft column (33) and the output shaft of the first motor (7), and the pair of second synchronous wheels (34) are respectively mounted on the roller shaft (31) and the shaft column (33).

Images