JP5318442B2 - Knitted fabric edge reversing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically reverse a folding part to the front surface side in knitting a knitted fabric having an outward folding part at an end part to be a knitting end side. <P>SOLUTION: The apparatus for reversing a knitted fabric end has a fabric tube 5 for sucking a knitted fabric 100 after knitting, which has an upper end part arranged at the center in the cylinder 10 of a circular knitting machine 2 and a reverse guide 6 that is arranged in the fabric tube 5, vertically penetrating through the center and forms a central opening 21 for passing a knitted fabric and has a constitution in which the reverse guide 6 is disposed upward in a state where a peripheral space 30 is separated from the whole circumference of the tube inner peripheral surface the fabric tube 5 and has a ring-shaped engagement part 22 is fitted into the folding part 106 of the knitted fabric 100. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a knitted fabric end reversing device.

Some circular knitting machines for knitting socks, pantyhose, and the like include a knitted fabric guide device (see, for example, Patent Document 1). This knitted fabric guide device has a fabric tube having an upper end portion that expands in a funnel shape, and the upper end portion of the fabric tube is inserted into a circular knitting machine.
Since the suction action can be generated in the fabric tube, the knitted fabric knitted by the circular knitting machine is pulled out to the lower side of the circular knitting machine through the fabric tube and the subsequent conveying pipe. It is designed to be taken out of the machine.

  The circular knitting machine has a cylinder that holds the cylinder needle so as to be movable up and down, and a dial that is provided on the cylinder and holds the dial needle slidably radially outward. If both the needle and dial needle are operated, rubber knitting (also called double fabric) can be knitted. If either the cylinder needle or dial needle is operated and the other is stopped, flat knitting (single Knitting is also possible.

FIG. 9 shows an example of a knitted fabric to be knitted, which forms one leg of a molded knitted pant. This knitted fabric 100 has a waist band 101, a panty portion 102, and a hem end 103. One longitudinal cut is made in a part of the waist band 101 and the panty portion 102, and the left and right stitches are sewn to each other. That is how molded knitted pants are made.
By the way, a bag knitting is adopted for the waistband 101, a range from the waistband 101 to the upper half 104 of the panty 102 is a rubber knitting, and a lower half 105 of the panty 102 is a flat knitting, and a hem end 103 is formed. Is another type of flat knitting, the knitting procedure starts from the hem end 103 and ends with knitting the waistband 101 last. In this case, the waistband 101 is knitted in a state where the outward folded portion 106 is generated by bag knitting.
Japanese Patent Laid-Open No. 10-195743

Since the knitted fabric 100 shown in FIG. 9 requires heat treatment and sewing for both left and right feet in the subsequent steps, it is necessary to invert the folded portion 106 face up. Since this operation is a manual operation, it takes much labor and time. Naturally, it became one of the causes of raising the manufacturing cost of molded knitted pants, and it was a big bottleneck in cost reduction.
The present invention has been made in view of the above circumstances, and when knitting a knitted fabric having an outward folded portion at an end that is a knitting end side, the folded portion is automatically reversed face up. It is an object of the present invention to provide a knitted fabric end reversing apparatus that can perform knitted fabric with high efficiency and ease, and that can reduce the manufacturing cost.

In order to achieve the above object, the present invention has taken the following measures.
In other words, the knitted fabric end reversing device according to the present invention provides a circular knitting machine with a cylinder inside the circular knitting machine, with respect to a circular knitting machine that performs knitting while generating an outward folded portion at the end of the knitted fabric. A reversal that is provided with the upper end arranged in the center and sucks the knitted fabric to be knitted downward, and a central opening that passes through the fabric tube up and down in the center and that passes through the knitted fabric. And a guide.

The reversing guide includes an annular engagement portion that is provided upward in a state where a circumferential gap is separated from the entire inner peripheral surface of the fabric tube so as to fit in a folded portion of the knitted fabric, and an inner portion of the central opening. A plurality of fins projecting from the peripheral surface at a predetermined interval in the circumferential direction.
The plurality of fins are formed in a shape that sharpens a protruding end toward the radially inward of the central opening, and radially outward from the inner peripheral side of the central opening between the fins. A notch having a shape cut into a semicircular shape is formed.

When the reverse guide is provided in the fabric tube as described above, when the knitted fabric is sucked into the fabric tube, the annular engagement portion of the reverse guide is fitted and engaged in the folded portion of the knitted fabric. It becomes a state.
Therefore, as the knitted fabric passes through the central opening of the reversing guide, the folded portion is reversed (turned upside down). That is, the knitted fabric is in the middle of being sucked and conveyed through the fabric tube, and the folded portion is surely reversed, and the entire knitted fabric is turned to the front side (the folded portion is eliminated). Therefore, as a manual work, the work of reversing the folded portion upside down is omitted, so that the knitted fabric can be manufactured efficiently and easily, and the manufacturing cost can be reduced.

Moreover, it has been confirmed by experiments that the suction action in the central opening is enhanced by providing the fin in the central opening of the reversing guide.
The reversing guide is provided with a partition member that protrudes toward the tube inner peripheral surface of the fabric tube at a position below the annular engagement portion, and the fin and the semicircular notch are formed on the inner peripheral portion of the partition member. Is preferably formed.

When such a partition member is provided, when the folded portion of the knitted fabric is fitted into the annular engagement portion, the lower end of the outer periphery of the folded portion becomes bottomed by the partition member, and the lower end level is adjusted. . Therefore, it is possible to reliably obtain the effect that the folded portion is inverted along the annular engagement portion.
In addition, this partition member can suppress or prevent air leakage that would unnecessarily pass through the circumferential gap between the inner peripheral surface of the fabric tube and the reversing guide. Therefore, the suction action on the knitted fabric can be effectively utilized as much as possible.

In the reversing guide, a side through-hole that allows air in the circumferential gap formed on the outer peripheral side of the reversing guide to flow into the central opening in the reversing guide penetrates in the radial direction near the lower portion of the annular engagement portion. In addition, it is preferable that a plurality are provided at predetermined intervals in the circumferential direction.
When such a side through hole is provided, a part of the air sucked in the fabric tube is guided to the outer peripheral side of the reversing guide, and then flows into the central opening through the side through hole. A flow occurs. This air flow causes an action of drawing the folded portion of the knitted fabric toward the outer periphery of the reversing guide, and as a result, the certainty that the folded portion is reversed to the front is also increased (no reversal error). .

In addition, it is preferable that the fabric tube is formed with a storage portion that allows the reversing guide to be fitted by making the inner diameter of the upper end side expanded to a predetermined depth.
If such a storage part is formed, the outer diameter as a reversing guide can be formed to a necessary and sufficient dimension. That is, if the outer diameter of the reversing guide is formed large, the width of the circumferential gap generated between the tube inner peripheral surface of the fabric tube and the reversing guide and the inner diameter of the central opening formed in the reversing guide are sufficient. It can be formed in size.

Therefore, it goes without saying that the knitted fabric easily passes through the center opening of the reversing guide, and the folded portion of the knitted fabric is surely fitted into the circumferential gap, so that the folded portion is surely connected to the annular engaging portion of the reversing guide. It comes to fit.
In addition, it is preferable that the reversing guide is provided with a lower cylindrical portion in which the inner diameter of the central opening is increased in the upper part, the diameter is reduced in the middle part, and the diameter is increased again in the lower part.

  If such a lower cylinder portion is provided, the flow rate increases when air passes through an intermediate diameter-reduced portion, and the suction action increases accordingly. For this reason, the force for pulling the knitted fabric becomes stronger, and the certainty that the folded portion is reversed in the front direction is increased (there is no reversal error).

  In the knitted fabric end reversing device according to the present invention, when a knitted fabric having an outward folded portion at the end on the knitting end side is knitted, the folded portion can be automatically reversed face-up. Therefore, the knitted fabric can be manufactured with high efficiency and ease, and the manufacturing cost can be reduced.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a knitted fabric end reversing device 1 according to the present invention, and FIG. 4 shows the knitted fabric end reversing device 1 mounted on a circular knitting machine 2. . 5 to 8 show the process of knitting the knitted fabric 100 by the circular knitting machine 2 over time.
As is apparent from FIG. 4, the knitted fabric end reversing device 1 according to the present invention includes a fabric tube 5 provided with the upper end portion inserted into the circular knitting machine 2, and a reversing guide provided in the fabric tube 5. 6.

  The circular knitting machine 2 has a cylindrical cylinder 10 and a disk-shaped dial 11 provided on the upper part of the cylinder 10. The outer periphery of the cylinder 10 is rotated integrally around a common central axis. By skillfully using a cylinder needle that moves up and down on the surface and a dial needle that slides in the radial direction on the upper surface of the dial 11, rubber knitting or flat knitting can be performed. Using such a circular knitting machine 2, as shown in FIG. 9, the knitted fabric 100 with the outward folded portion 106 formed at the end that is the knitting end side is knitted.

The fabric tube 5 is provided in an upright state in the center of the cylinder 10 in the circular knitting machine 2, and a suction port portion 5 a spreading in a funnel shape is formed at the upper end portion. An annular gap 12 is held between the top and bottom of the mouthpiece 5a and the dial 11 of the circular knitting machine 2, and the knitted fabric 100 is knitted so as to be fed into the gap 12 from the entire circumference (see FIG. 5).
A conveyance pipe 13 that leads to the outside of the circular knitting machine 2 is connected to the lower end of the fabric tube 5. The transport pipe 13 is provided with a double pipe formed by a mesh pipe 14 and a cover pipe 15, and the inside of the cover pipe 15 is sucked by a suction device 16.

  Accordingly, a suction action is generated in the fabric tube 5 by the operation of the suction device 16 (see arrows X and Y in FIG. 1), and as shown in FIG. Thus, the fabric tube 5 is drawn into the fabric tube 5, and this serves as a pulling-down (downward tension) action that assists the knitting operation of the circular knitting machine 2. As shown in FIG. 8, the knitted fabric 100 after knitting is sucked downward in the fabric tube 5.

As shown in FIG. 1, the fabric tube 5 is formed with a storage portion 17 in which the reversing guide 6 can be fitted by making the inner diameter of the upper end side expanded to a predetermined depth. The lower end portion of the storage portion 17 is a tapered portion 18 whose diameter is reduced toward the lower side and is connected to the tube body 5b below the tapered portion 18.
As shown in FIG. 2, the reversing guide 6 is formed with a knitted fabric passing center opening 21 penetrating vertically in the center, and has a short cylindrical shape as a whole. An annular engagement portion 22 is provided at the upper peripheral edge of the reversing guide 6, a partition member 23 that projects radially outward at a position lower than the annular engagement portion 22, and a lower stage cylinder that extends downward. A portion 24 is provided. Further, a fin 25 protruding inward in the radial direction is provided inside the central opening 21.

In the present embodiment, the guide main body 26 is formed using a straight short tube member as a raw material, and the annular engagement portion 22 is formed at the upper peripheral edge of the guide main body 26. Further, the partition member 23 is formed by a disc having a hole, and this is coupled to the lower end of the guide body 26. Further, the lower cylindrical portion 24 is also formed from a short tube member as a separate material.
The annular engagement portion 22 is an annular wall that stands up in a state in which the circumferential gap 30 is separated from the entire circumference of the tube inner peripheral surface of the fabric tube 5 (that is, the inner peripheral surface of the storage portion 17). It is provided as. Therefore, as shown in FIG. 6, when the knitted fabric 100 that has been knitted by generating the folded portion 106 is drawn downward in the fabric tube 5, the annular engagement portion 22 is fitted inside the folded portion 106. (The folded portion 106 is caught and covered with the annular engagement portion 22).

In the present embodiment, the annular engagement portion 22 has a taper that becomes smaller in diameter toward the upper side, and the fitting into the folded portion 106 is performed smoothly and reliably. The annular engagement portion 22 has a flat upper surface (the annular surface is horizontal).
However, these are not limited, and the annular engagement portion 22 may rise in a straight cylindrical shape (no taper), or a wavy unevenness or an inclination may be provided on the upper surface. The inner diameter of the annular engagement portion 22 is not particularly limited. These can be appropriately changed according to the shape and size of the knitted fabric 100, the amount of folding of the folded portion 106, the knitting structure of the folded portion 106, the material (yarn type of the knitting yarn), and the like.

The guide body 26 is provided with a side through hole 32 that penetrates in a radial direction at a position near the lower portion of the annular engagement portion 22 (specifically, near the lower end of the guide body 26). A plurality of the side through holes 32 are arranged at predetermined intervals in the circumferential direction of the annular engagement portion 22.
Since the side through hole 32 is provided, a part of the air sucked in the fabric tube 5 is guided to the outer peripheral side (circumferential gap 30) of the reversing guide 6, and then the side through hole 32. A flow that flows into the central opening 21 is generated (see arrow Y in FIG. 1). This air flow causes an action of drawing the folded portion 106 of the knitted fabric 100 toward the outer peripheral side of the reversing guide 6. As a result, the certainty that the folded-back portion 106 is reversed to the front is also increased.

In the example shown in the figure, the upper portion is an arch shape and the lower portion is a cave-like opening reaching the partition member 23. However, the opening shape, the formation height, etc. are particularly limited, such as a circular hole, a long hole, or a square hole. Is not to be done. Further, the number of formations and the opening size are not particularly limited.
As shown in FIG. 1, when the reversing guide 6 is fitted into the storage portion 17 of the fabric tube 5, the partition member 23 is in a state of projecting toward the inner peripheral surface of the tube, and the outer peripheral edge portion is inside the tube. It is designed to come close to or contact with the peripheral surface.

Since the partition member 23 is provided, as shown in FIG. 6, when the folded portion 106 of the knitted fabric 100 is fitted into the annular engaging portion 22, the lower end of the outer periphery of the folded portion 106 is bottomed by the partition member 23. Thus, the lower end level is adjusted.
This partition member 23 also has an effect of suppressing or preventing air leakage that would unnecessarily pass through the circumferential gap 30 between the tube inner peripheral surface of the fabric tube 5 and the reversing guide 6. The air flow indicated by the arrow Y can be generated without loss, and as a result, the action of pulling the knitted fabric 100 downward in the fabric tube 5 can be utilized as effectively as possible.

The lower cylindrical portion 24 is formed in a drum shape with a narrowed middle portion in the height direction as shown in FIG. 2, and as shown in FIG. 1, the inner diameter of the central opening 21 formed inside thereof is higher. The diameter is increased at the upper part (upper diameter large part 37), the diameter is reduced at the middle part (middle diameter small part 38), and the diameter is further increased at the lower part (lower diameter large part 39).
Therefore, when an air flow is generated by the suction action in the central opening 21 in the lower cylinder portion 24, the flow speed of the air flow increases when passing through the small middle diameter portion 38, and the suction action increases accordingly. Become. For this reason, the force for pulling the knitted fabric 100 is also increased.

As shown in FIG. 3, a plurality of fins 25 provided in the central opening 21 are provided at predetermined intervals in the circumferential direction.
In the present embodiment, the fin 25 is also formed by a disk with a hole forming the partition member 23. Therefore, naturally, the entire reversing guide 6 has the same height as the partition member 23. It is arranged at a vertical position (between the upper and lower portions of the guide body 26 and the lower cylindrical portion 24).

The shape of the fin 25 is such that when a plurality of semicircles are cut along the circumferential direction (inner circumferential direction of the central opening 21) with respect to the inner peripheral edge of the hole of the partition member 23 (the disk with the hole), It is formed in a shape that protrudes in a thorn shape between adjacent notches.
However, these are not limited, and it is possible to form the fins 25 with a material different from that of the partition member 23. In this case, the fins 25 are arranged at a height different from that of the partition member 23. It is also possible. The size of the fins 25 is not particularly limited.

It has been confirmed by experiments that the suction action in the central opening 21 is enhanced by the provision of the fins 25. Further, it is presumed that the rectification of the air flow passing through the central opening 21 is effective.
As is clear from FIGS. 1 and 2, a storage portion 17 is formed in the fabric tube 5, and a reversing guide 6 having a necessary and sufficient outer diameter is fitted into the storage portion 17. Accordingly, in the present embodiment, a plurality of spacer pieces 42 are attached to the upper outer peripheral surface of the lower cylindrical portion 24 as a measure for stabilizing the fitting height of the reversing guide 6.

Therefore, the width | variety and height of the circumferential clearance 30 produced between the tube inner peripheral surface of the fabric tube 5 and the inversion guide 6 are ensured, and it can hold | maintain now.
As described in detail above, the knitted fabric end reversing device 1 according to the present invention has the configuration in which the reversing guide 6 is provided in the fabric tube 5, so that when the knitted fabric 100 is drawn into the fabric tube 5, The annular engagement portion 22 of the reversing guide 6 is fitted into the folded portion 106 of the ground 100, and is engaged.

  Therefore, as the knitted fabric 100 passes through the central opening 21 of the reversing guide 6, the folded portion 106 is reversed (turned upside down). That is, the knitted fabric 100 is surely turned over in the middle of being sucked and conveyed through the fabric tube 5, so that the knitted fabric 100 is entirely turned upside down (the folded portion 106 is eliminated). Therefore, as a manual work, the work of reversing the turn-up portion 106 to the front is omitted, so that the knitted fabric can be manufactured efficiently and easily, and the manufacturing cost can be reduced.

By the way, this invention is not limited to the said embodiment, It can change suitably according to embodiment.
For example, the shape or material of the knitted fabric 100 is not limited as long as the outward folded portion 106 is formed at the end on the knitting end side.

It is the sectional side view which showed one Embodiment of the knitted fabric end inversion apparatus which concerns on this invention. It is a perspective view of the inversion guide employ | adopted with the knitted fabric end inversion apparatus of FIG. It is the top view which showed the partition member and the fin corresponding to the AA arrow line of FIG. FIG. 2 is a side sectional view showing the knitted fabric end reversing device of FIG. 1 mounted on a circular knitting machine. It is the sectional side view which showed the 1st step where the knitted fabric is knitted by the circular knitting machine. FIG. 5 is a side sectional view showing a second stage in which the knitted fabric is knitted by the circular knitting machine. FIG. 5 is a side sectional view showing a third stage in which a knitted fabric is knitted by a circular knitting machine. FIG. 6 is a side sectional view showing a fourth stage in which a knitted fabric is knitted by a circular knitting machine. It is the partially crushed side view which showed an example of the knitted fabric.

DESCRIPTION OF SYMBOLS 1 Knitted fabric edge reverse apparatus 2 Circular knitting machine 5 Fabric tube 6 Inversion guide 10 Cylinder 17 Storage part 21 Central opening 22 Annular engagement part 23 Partition member 24 Lower stage cylinder part 25 Fin 30 Circumferential gap 32 Side part through hole 100 Knitted fabric 106 Folded part

Claims (3)

Cylinder (10) of the circular knitting machine (2) with respect to the circular knitting machine (2) that performs knitting while producing an outward folded portion (106) at the end on the knitting end side of the knitted fabric (100) A fabric tube (5) for sucking downwardly the knitted fabric (100) provided with the upper end disposed in the inner center, and
A reversing guide (6) provided in the fabric tube (5) and penetrating vertically in the center and having a central opening (21) for passing through the knitted fabric,
The reversing guide (6) is provided upward in a state where the circumferential gap (30) is separated from the entire inner peripheral surface of the tube of the fabric tube (5) and is placed in the folded portion (106) of the knitted fabric (100). An annular engagement portion (22) adapted to fit;
A plurality of fins (25) projecting from the inner peripheral surface of the central opening (21) at predetermined intervals in the circumferential direction;
The plurality of fins (25) are formed in a shape that sharpens the protruding end toward the inside in the radial direction of the central opening (21),
Between the fin (25) and the fin (25), a notch having a semicircular shape is formed from the inner peripheral side of the central opening (21) to the radially outer side. Knitted fabric edge reversing device. The reversing guide (6) is provided with a partition member (23) projecting toward the tube inner peripheral surface of the fabric tube (5) at a position lower than the annular engagement portion (22),
The knitted fabric end reversing device according to claim 1, wherein the fin (25) and a semicircular notch are formed in an inner peripheral portion of the partition member (23).   The reversing guide (6) has a side portion through which air in the circumferential gap (30) formed on the outer peripheral side of the reversing guide (6) flows into the central opening (21) in the reversing guide (6). 3. A plurality of holes (32) are provided in the vicinity of a lower portion of the annular engagement portion (22) in the radial direction and provided at predetermined intervals in the circumferential direction. Knitted fabric end reversing device.

Images