CN103668762B - A kind of knitted fabric draw-off mechanism of Computerized flat knitting machine - Google Patents

Abstract

The invention relates to the technical field of computerized flat knitting machines, in particular to a knitted fabric pulling mechanism of a computerized flat knitting machine. The knitted fabric pulling mechanism of the computerized flat knitting machine includes a front needle bed, a rear needle bed, a first main pulling roller shaft, a second main pulling roller shaft, a third main pulling roller shaft and a pulling comb. The needle bed and the rear needle bed are arranged in an inverted "V" shape, a gap is provided between the upper ends of the front needle bed and the rear needle bed, and a left main pulling roller and a right puller roller are arranged below the gap. Side main pulling rolls, the left main pulling roll and the right main pulling roll are arranged symmetrically. The invention provides a knitted fabric pulling mechanism of a computerized flat knitting machine with a simple structure, which can not only effectively and reasonably pull the formed knitted fabric out of the loop forming area, but also reverse upward and loosen the fabric.

Description

A knitted fabric pulling mechanism for a computerized flat knitting machine

technical field

The invention relates to the technical field of computerized flat knitting machines, in particular to a knitted fabric pulling mechanism of a computerized flat knitting machine.

Background technique

As we all know, in order to successfully complete the knitting process, the pulling mechanism must prevent the coils in the needle groove from rising with the pointer, otherwise it will be impossible to realize the coil withdrawal, that is, the old coils will not slide down under the needle latch, and there will be no New coils may form. In order to prevent the loop that has been taken off from the needle from hindering the successful completion of the knitting process, the loop must be pulled toward the back of the needle to pull the formed fabric out of the knitting area in time.

In the prior art, as shown in the figure, the fabric is pulled through the clamping of the main and auxiliary two pairs of pulling rollers and the rotation of the roller shaft. The length of the fabric between the knitting area and the pulling mechanism is kept constant, and the design of complex patterns is simple. There are limitations, the product types are naturally limited, and the mechanism can obtain a constant downward pull. According to the traditional transmission mode, the pulling roller can obtain a unidirectional pulling force when the machine head traverses to one end of the needle bed.

The pulling mechanism has a great influence on the knitting process and the quality of the final product. The pulling force of the computerized flat knitting machine can affect the density of the fabric. Therefore, when the structure of the knitted fabric and the width of the fabric change, it is necessary to adjust the pulling force reasonably. The size of the pulling force has been adapted to the requirements of the designed product. The pulling force is mainly provided by the main pulling roller. The action of the main pulling roller is controlled by the pulling motor. The pulling motor is designed with a stepping motor. The rotation speed of the motor is changed through the weaving program control, thereby controlling the size of the pulling force. .

The magnitude of the pulling force is mainly to overcome the resistance generated when the knitting needle withdraws and loops, so as to prevent the clothing pieces from floating out of the hole with the force of the knitting needle. Too much or too little pull is not good. If the pulling force is too small, the fabric width will become wider and shorter. If the pulling force is too small, it will cause difficulties in the looping and looping operations, resulting in missing stitches, hanging stitches and edge weaving. If the pulling force is too large, the length of the fabric will increase. If it is large and the width is reduced, it will lead to increased weaving resistance, yarn breakage, and fabric holes in severe cases.

Due to the size of the force between the fabric and the coil when it is withdrawn and looped, the thickness of the gauge, the geometry of the knitting needle, the type and specification of the yarn, the pretreatment method of the yarn, the temperature and humidity of the environment, the tension of the yarn feeding, and the density of the fabric It is related to many factors, so the pulling force is restricted by the yarn used, plant structure and quality indicators (density, square meter weight, etc.). On the premise of ensuring the smooth completion of the process, the main and auxiliary pulling force The roller should be as small as possible, so that the looping can be carried out smoothly, and it is also of great help to improve the quality of the product.

Contents of the invention

The invention provides a knitted fabric pulling mechanism of a computerized flat knitting machine with a simple structure, which can not only effectively and reasonably pull the formed knitted fabric out of the loop forming area, but also reverse and loosen the fabric upward.

The present invention is achieved through the following technical solutions:

A knitted fabric pulling mechanism of a computerized flat knitting machine, comprising a front needle bed, a rear needle bed, a first main pulling roller, a second main pulling roller, a third main pulling roller and a pulling comb, the The front needle bed and the rear needle bed are arranged in an inverted "V" shape, a gap is provided between the upper ends of the front needle bed and the rear needle bed, and the left main pulling roller is arranged below the gap and the right main pulling roll, the left main pulling roll and the right main pulling roll are arranged symmetrically, the first main pulling roll axis, the second main pulling roll axis and the third main pulling roll The axis is arranged in an equilateral triangle under the left main pulling roller and the right main pulling roller and between the front needle bed and the rear needle bed, and the first main pulling roller shaft is arranged on the left side , the second main pulling roller shaft and the third main pulling roller shaft are arranged on the right side, the second main pulling roller shaft is located above the third main pulling roller shaft, and the first main pulling roller shaft The pulling roller shaft, the second main pulling roller shaft and the third main pulling roller shaft are not in contact with each other, and the pulling comb is arranged between the front needle bed and the rear needle bed and is located on the third main Below the pulling roller.

Arc-shaped teeth are arranged on the outer walls of the first main pulling roller shaft, the second main pulling roller shaft and the third main pulling roller shaft.

A solenoid valve is provided on the first main pulling roller shaft.

The cross sections of the left main pulling roll and the right main pulling roll are triangular in shape.

A primer is provided on the pulling comb, and a primer sleeve is provided on the primer.

The beneficial effects brought by the present invention are:

In the present invention, the knitted fabric pulling mechanism of the computerized flat knitting machine adopts the first main pulling roller shaft, the second main pulling roller shaft and the third main pulling roller shaft and the left main pulling roller and the right main pulling roller. The pulling roller cooperates with the pulling comb to complete the pulling action, which can properly pull the knitted fabric for different weaving structures, so that the mechanism can reduce the wear of the mechanism, ensure the quality of the product, and improve the production efficiency.

Description of drawings

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Fig. 1 is a structural schematic diagram of a knitted fabric pulling mechanism of a computerized flat knitting machine according to the present invention.

Fig. 2 is a cross-sectional view of the first main pulling roll according to the present invention.

Fig. 3 is a structural schematic diagram of the open state of the primer needle according to the present invention.

Fig. 4 is a structural schematic diagram of the closed state of the bottom lifting needle according to the present invention.

The labels corresponding to the names of the components in the figure are as follows:

1. Front needle bed; 2. Rear needle bed; 3. The first main pulling roller; 4. The second main pulling roller; 5. The third main pulling roller; 6. Pulling comb; 7. Gap; 8. Left main pulling roller; 9. Right main pulling roller; 10. Arc-shaped teeth; 11. Solenoid valve; 12. Lifting needle; 13. Lifting needle sleeve; 14. Yarn.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:

As an embodiment of the knitted fabric pulling mechanism of the computerized flat knitting machine of the present invention, as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, it includes a front needle bed 1, a rear needle bed 2, and a first main pulling roller Shaft 3, second main pulling roller shaft 4, third main pulling roller shaft 5 and pulling comb 6, the front needle bed 1 and the rear needle bed 2 are arranged in an inverted "V" shape, the front A gap 7 is provided between the needle bed 1 and the upper end of the rear needle bed 2, and a left main pulling roller 8 and a right main pulling roller 9 are arranged below the gap 7, and the left main pulling roller The roller 8 and the main pulling roller 9 on the right side are arranged symmetrically, and the first main pulling roller shaft 3, the second main pulling roller shaft 4 and the third main pulling roller shaft 5 are arranged in an equilateral triangle on the left side. Below the side main pulling roller 8 and the right main pulling roller 9 and between the front needle bed 1 and the rear needle bed 2, the first main pulling roller shaft 3 is arranged on the left side, and the second The main pulling roller shaft 4 and the third main pulling roller shaft 5 are arranged on the right side, the second main pulling roller shaft 4 is located above the third main pulling roller shaft 5, and the first main pulling roller shaft The roller shaft 3, the second main pulling roller shaft 4 and the third main pulling roller shaft 5 are not in contact with each other, and the pulling comb 6 is arranged between the front needle bed 1 and the rear needle bed 2 and is located Below the third main pulling roller shaft 5 .

In this embodiment, arc-shaped teeth 10 are provided on the outer walls of the first main pulling roller shaft 3 , the second main pulling roller shaft 4 and the third main pulling roller shaft 5 .

In this embodiment, the first main pulling roller shaft 3 is provided with a solenoid valve 11 .

In this embodiment, the pulling comb 6 is provided with a primer needle 12 , and the primer needle 6 is provided with a primer needle sleeve 13 .

In this embodiment, the cross sections of the left main pulling roller 8 and the right main pulling roller 9 are triangular in shape.

The working principle is as follows: when the machine head moves, the front needle bed 1 and the rear needle bed 2 just start weaving. When weaving the waste yarn at the beginning, the pulling comb 6 mainly weaves the waste yarn, and the drawing of the waste yarn depends more on the pulling comb 6's under-quoting effect. At this time, the first main pulling roller shaft 3 is in the left station. During the process of weaving two rows of yarns 14 by the knitting mechanism, the pulling comb 6 is driven by the sprocket and starts to rise and is in the state to be hooked. Finally, the machine head stops at the leftmost end of the machine and waits for the pulling comb 6 to hook up the yarn 14. After the pulling comb 6 rises and hooks the yarn 14, the starting needle 12 is closed. Then, the pulling comb 6 descends to the safe position, and the machine head is controlled by the program, and the following braiding starts to run automatically.

Regardless of whether the waste yarn is pulled with the pulling comb 6, after the yarn 14 is woven to a certain extent, the pulling task is mainly taken care of by the main pulling roller 8 on the left side and the main pulling roller 9 on the right side. The torque motor provides power to allow the left main pulling roller 8 and the right main pulling roller 9 to cooperate with the weaving mechanism to pull. In essence, the pulling force of the left main pulling roller 8 and the right main pulling roller 9 is related to its own rotating speed, that is, the effect of the pulling mechanism is mainly reflected in the left main pulling roller 8 and the right main pulling roller. On the rotating speed of pulling roller 9, the speed coordination of pulling comb 6 and weaving mechanism is key.

After the knitting mechanism completes a row of coils, the pulling mechanism can be carried out continuously and in time, and the left main pulling roller 8 and the right main pulling roller 9 can quickly pull it down, so that the braided yarn 14 can Tighten quickly, and the pulling force on each wale should be steady, even and consistent.

In the weaving process, if the weaving mechanism weaves fabrics of general organization, such as plain stitches, ribs, double ribs, etc. that do not need to be turned, the cooperation of the pulling comb 6 and the weaving mechanism is relatively simple, mainly left The main pulling roller 8 on the side and the main pulling roller 9 on the right are working, and the machine head runs back and forth and cooperates with the knitting needles to knit. Pulling force of pulling roller 8 and right main pulling roller 9.

During the weaving process, if the knitting mechanism weaves more complex fabrics, such as multiple tucks, partial knitting, stitches, etc. that need to be turned, the first main pulling roller shaft 3, the second main pulling roller The roller shaft 4 and the third main pulling roller shaft 5 cooperate with the weaving mechanism, and the first main pulling roller shaft 3 is controlled by the solenoid valve 11 to be in the right position to provide a suitable pulling force. At this time, the first main pulling roller shaft 3, the second main pulling roller shaft 4 and the third main pulling roller shaft 5 will play the main pulling role, and the three do not contact each other, so there is not too much damage to the fabric. Squeeze traction; the first main pulling roller 3, the second main pulling roller 4 and the third main pulling roller 5 are responsible for adjusting the tension of the pulling, and the amount of pulling and winding per unit time can be adjusted according to the needs Adjustment, and can be adjusted while the machine is running.

If the knitting is fast and the pulling force is small, there will be cloth pieces accumulated between the hole of the needle bed and the pulling comb, resulting in insufficient pulling force and less or no pulling force of the loop being knitted. If the pulling force is too large and the knitting speed cannot keep up with the pulling speed, the knitting needle will be damaged. If the knitting needle has a transfer action, the pulling force of the transfer section pulling comb will be suitably small, because the loops are loose so that the transfer of the loops is easy, and the yarn 14 will not be damaged or the knitting needles will be damaged.

If the fabric is suddenly wound on the first main pulling roller shaft 3, the second main pulling roller shaft 4 and the third main pulling roller shaft 5 due to an accident, the left main pulling roller 8 and the right main pulling roller 9 Rotate counterclockwise to loosen the cloth upwards, so as to relax the clamping force of the fabric and reverse the take-up mechanism.

Claims (4)

1. A knitted fabric pulling mechanism of a computerized flat knitting machine, characterized in that it comprises a front needle bed, a rear needle bed, the first main pulling roller, the second main pulling roller, the third main pulling roller and Pulling comb, the front needle bed and the rear needle bed are arranged in an inverted "V" shape, a gap is provided between the upper ends of the front needle bed and the rear needle bed, and a left The main pulling roller on the side and the main pulling roller on the right side, the main pulling roller on the left side and the main pulling roller on the right side are arranged symmetrically, the axis of the first main pulling roller, the axis of the second main pulling roller and the axis of the second main pulling roller The axes of the three main pulling rollers are arranged in an equilateral triangle below the left main pulling roller and the right main pulling roller and between the front needle bed and the rear needle bed, and the first main pulling roller The shaft is arranged on the left side, the second main pulling roller shaft and the third main pulling roller shaft are arranged on the right side, and the second main pulling roller shaft is located above the third main pulling roller shaft, so The first main pulling roller shaft, the second main pulling roller shaft and the third main pulling roller shaft are not in contact with each other, and the pulling comb is arranged between the front needle bed and the rear needle bed and is located Below the third main pulling roller shaft; Arc-shaped teeth are arranged on the outer walls of the first main pulling roller shaft, the second main pulling roller shaft and the third main pulling roller shaft. 2. The knitted fabric pulling mechanism of a computerized flat knitting machine according to claim 1, wherein a solenoid valve is provided on the first main pulling roller. 3. The knitted fabric pulling mechanism of a computerized flat knitting machine according to claim 2, wherein the cross-sections of the left main pulling roller and the right main pulling roller are triangular in shape. 4 . The knitted fabric pulling mechanism of a computerized flat knitting machine according to claim 3 , wherein the pulling comb is provided with a kicking needle, and the lifting needle is provided with a kicking needle sleeve.