CN118814348A - Pulling device and pulling method of double-needle sock machine - Google Patents

Abstract

The present invention discloses a pulling device and a pulling method for a double-needle cylinder hosiery machine, including a suction tube arranged in a lower needle cylinder and a locking piece arranged in an upper needle cylinder. When the upper needle cylinder and the lower needle cylinder are coaxial, the locking piece and the suction tube rotate synchronously with the upper and lower needle cylinders, and the locking piece moves up and down along the axis of the upper needle cylinder to cooperate with or disengage from the suction tube. The locking piece includes two annular bodies nested in each other, and the two annular bodies are independently supported and driven by a driving mechanism. During the weaving process, the two annular bodies move downward alternately. The present invention adopts two annular bodies, one up and one down; it ensures that there is always an annular body moving downward, so there is always a pulling force on the fabric, that is, it ensures that the tension state of the fabric is continuous.

Description

Pulling device and pulling method of double-needle sock machine

Technical Field

The invention belongs to the technical field of knitting machinery, and in particular relates to a double-cylinder socks machine, and in particular to a pulling device and a pulling method of the double-cylinder socks machine.

Background Art

During production on a double-needle hosiery machine, the fabric being knitted needs to be pulled to keep it in a tensioned state.

CN103827372 discloses a double-needle cylinder sock machine with a pulling function. The core of its technical solution is the cooperation of a locking element and a suction tube, wherein the suction tube is located in the lower needle cylinder and the locking element is located in the upper needle cylinder, and both can move up and down along the axis of the needle cylinder; the locking element has a head similar to a truncated cone, and its diameter is larger than the suction tube. During the working process, the fabric being formed is between the locking element and the suction tube, and the locking element presses the fabric toward the suction tube to make it tight; as the weaving continues, the locking element is periodically loosened so that the suction tube can suck the newly generated fabric into it, and at the same time the locking element is pressed again to make the fabric tight again. This goes back and forth, and during the weaving process, the locking element and the suction tube need to rotate synchronously with the needle cylinder to provide tension to the fabric being formed so that it can be weaved smoothly.

It can be seen from the above description that in the prior art, as the locking element is engaged with or disengaged from the suction tube, a pulling force is periodically generated on the fabric; that is, the tension state of the fabric is discontinuous.

Summary of the invention

The object of the present invention is to provide a pulling device and a pulling method for a double-needle hosiery machine, so as to continuously pull fabrics during the knitting process.

The present invention adopts the following technical solution: the pulling device of the double-needle cylinder sock machine includes a suction tube arranged in the lower needle cylinder and a locking piece arranged in the upper needle cylinder; when the upper needle cylinder and the lower needle cylinder are coaxial, the locking piece and the suction tube rotate synchronously with the upper and lower needle cylinders, and the locking piece moves up and down along the axis of the upper needle cylinder to cooperate with or disengage from the suction tube; it is characterized in that: the locking piece includes two annular bodies nested in each other, the two annular bodies are independently supported, and are independently driven by a driving mechanism.

The two annular bodies are each supported by a pair of support rods, and the support rods are evenly distributed on the circumferential cross section and staggered with each other.

The locking member further comprises an assembly head, which is cylindrical and has four longitudinal through grooves on its circumferential surface; the upper part of the support rod is accommodated in the assembly head and is fixed with a roller seat, which extends out of the assembly head through the through groove; a roller is mounted on the roller seat, and its rolling direction is perpendicular to the radial direction of the assembly head;

The lower part of each pair of support rods is fixedly connected to a ring-shaped body;

A spring is sleeved in the middle of each support rod, one end of the spring touches the bottom surface of the assembly head, and the other end is connected to the support rod, and the elastic force of the spring presses the support rod downward;

It also includes a guide plate, which cooperates with the roller and is fixed relative to the sock machine. When the locking piece rotates with the upper needle cylinder, the roller rolls along the contour line of the upper surface of the guide plate; the contour line of the upper surface of the guide plate is a smooth curve and has a pair of symmetrical high points and a pair of symmetrical low points.

The present invention also adopts such a technical solution: the pulling method of the double-needle hosiery machine adopts the above-mentioned pulling device, which is characterized in that during the knitting process, the two annular bodies move downward alternately.

When the present invention is working, the locking piece, the suction tube and the synchronous upper and lower syringes rotate synchronously. Since the support rod is covered with a spring, the support rod will be pushed downward, and the roller seat and the roller at the head of the support rod also have a tendency to be pressed downward; there is a longitudinal through groove on the circumferential surface of the assembling head, and the roller seat and the roller at the head of the support rod extend from the through groove and can move longitudinally in the through groove, so that the support rod can move up and down relative to the assembling head; when the assembling head rotates, the roller rolls along the contour line of the upper surface of the guide plate, and rises and falls with the contour line. When a pair of rollers are at the high point of the contour line, the corresponding annular body is in a higher position, and when a pair of rollers are at the low point of the contour line, the corresponding annular body is in a lower position, and this is repeated, so that the annular body moves up and down while rotating; the combination of the two annular bodies produces an up and down movement.

The essence of the present invention is to use two annular bodies, one above and one below; the downward movement of the annular body and the cooperation process with the suction pipe generate pulling force on the fabric, while in the process of the annular body moving upward away from the suction pipe, there is no pulling force on the fabric. The present invention ensures that there is always an annular body moving downward, so there is always pulling force on the fabric, that is, it ensures that the tension state of the fabric is continuous.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded schematic diagram of a double-needle hosiery machine.

FIG. 2 is a schematic diagram of a locking member.

Fig. 3 is a schematic diagram of A-A in Fig. 2 .

FIG. 4 is an exploded schematic diagram of a locking member.

FIG5 is a schematic diagram of a guide plate.

The accompanying drawings are marked as follows: 1-machine table; 2-column; 3-upper syringe; 4-lower syringe; 5-locking piece; 51-assembly head; 511-through groove; 52-first annular body; 53-second annular body; 54-support rod; 541-pin hole; 55-spring; 56-roller seat; 57-roller; 6-suction tube; 7-guide plate; 71-guide plate contour line; 711-high point; 712-low point.

DETAILED DESCRIPTION

See Figure 1. The double-needle cylinder hosiery machine of this embodiment includes a machine platform 1, and the main components of the hosiery machine are placed on the machine platform, including a column 2, in which a main transmission shaft is arranged. The machine platform 1 is also provided with a lower needle cylinder 4, which can rotate around its own axis. A suction pipe 6 is arranged in the lower needle cylinder 4, which is connected to a negative pressure device to generate negative pressure. The column is connected to the upper needle cylinder 3 through the cantilever end at its upper part, and the cantilever end is rotated under the drive of the main transmission shaft, so that the upper needle cylinder 3 and the lower needle cylinder 4 are coaxial or off-axis. When the hosiery machine is working, the upper and lower needle cylinders rotate coaxially and synchronously to perform knitting work.

The upper needle cylinder 3 is provided with a locking member 5 and a guide plate 7, wherein the locking member 5 rotates synchronously with the upper needle cylinder; the suction tube 6 in the lower needle cylinder rotates synchronously with the lower needle cylinder. When the sock machine is knitting, the newly formed coils of the fabric are formed at the junction of the upper and lower needle cylinders, and the already formed fabric is pulled downward by the cooperation of the locking member and the suction tube.

See Figure 5. The guide plate 7 is annular, and the locking member 5 passes through the ring. The upper surface of the guide plate 7 has a raised contour line 71. When viewed from above, the contour line 71 is circular; when viewed from the side, the contour line 71 is an undulating curve, symmetrical with its diameter as the axis, and has a pair of high points 711 and low points 712. In this embodiment, the high points 711 are two symmetrical points, and the low points 712 are two symmetrical arcs.

See Figures 2 to 4. The locking member 5 includes a cylindrical assembly head 51, and four through grooves 511 are formed on the circumferential surface of the assembly head. The locking member 5 also includes a first annular body 52 and a second annular body 53, both of which are made of smooth elastic materials; the first annular body 52 and the second annular body 53 have different diameters, so that they can be nested and clearance-matched with each other, and one annular body will not affect the movement of the other annular body. The two annular bodies are supported by two support rods 54 respectively, and the four support rods 54 are mutually offset, and the phase difference is 90°; the head of each support rod 54 is connected to a roller seat 56, and a roller seat 56 extends from a through groove 511, and its lower end is connected to a roller 57. A plurality of pin holes 541 are formed on each support rod 54; each support rod 54 is covered with a spring 55, the upper end of the spring 55 abuts against the lower end surface of the assembly head 51, and the lower end is connected to the pin hole 541 through a pin, so as to push the support rod 54 downward.

The roller 57 is placed on the guide plate 7 outside the assembly head 51. When the locking member 5 rotates, the guide plate 7 is fixed and does not rotate, so the roller moves on the contour line 71 of the guide plate. When the roller moves to the low point of the contour line, the spring presses the support rod downward; when the roller moves to the high point of the contour line, it drives the support rod to move upward against the elastic force of the spring. Since the roller heights of a pair of support rods are always the same, they drive the annular body connected to them to move up and down, resulting in a movement state of two annular bodies one up and one down, which cooperate with the suction pipe in turn to provide pulling force for the fabric.

Claims (4)

1. The pulling device of a double-cylinder hosiery machine comprises a suction tube arranged in the lower needle cylinder and a locking piece arranged in the upper needle cylinder. When the upper needle cylinder and the lower needle cylinder are coaxial, the locking piece and the suction tube rotate synchronously with the upper and lower needle cylinders, and the locking piece moves up and down along the axis of the upper needle cylinder to cooperate with or disengage from the suction tube; it is characterized in that: the locking piece comprises two annular bodies nested in each other, the two annular bodies are independently supported, and are independently driven by a driving mechanism. 2. The pulling device of the double-needle hosiery machine as described in claim 1 is characterized in that: the two annular bodies are each supported by a pair of support rods, and the support rods are evenly distributed on the circumferential cross-section and staggered with each other. 3. The pulling device of the double-needle hosiery machine according to claim 2, characterized in that: the locking member further comprises an assembly head, the assembly head is cylindrical, and four longitudinal through grooves are formed on its circumferential surface; the upper part of the support rod is accommodated in the assembly head, and a roller seat is fixed thereon, extending out of the assembly head through the through groove; a roller is mounted on the roller seat, and its rolling direction is perpendicular to the radial direction of the assembly head; The lower part of each pair of support rods is fixedly connected to a ring-shaped body; A spring is sleeved in the middle of each support rod, one end of the spring touches the bottom surface of the assembly head, and the other end is connected to the support rod, and the elastic force of the spring presses the support rod downward; It also includes a guide plate, which cooperates with the roller and is fixed relative to the sock machine. When the locking piece rotates with the upper needle cylinder, the roller rolls along the contour line of the upper surface of the guide plate; the contour line of the upper surface of the guide plate is a smooth curve and has a pair of symmetrical high points and a pair of symmetrical low points. 4. A pulling method for a double-needle hosiery machine, using the pulling device as described in any one of claims 1 to 3, characterized in that during the knitting process, the two annular bodies move downward alternately.