JPS6221848A - Displacement of hook in circular knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a circular knitting machine with an upper and lower hook having a structure in which transfer needles are arranged in the knitting needle row and transfer operations are performed between the knitting needles and the counter knitting needles. The present invention relates to a method in which a transfer guide in a transfer needle is reliably opposed to a mating knitting needle, so that the transfer can be performed smoothly and accurately.

(Prior art) Upper hook (dial hook) and/or lower hook (cylinder hook)
Then, a transfer needle with a transfer guide on the side of the needle,
Circular knitting in which the needles are appropriately arranged in rows of knitting needles in a knitting pot, and a stitch transfer operation is performed between the transfer needles in one pot and the knitting needles in the other pot, in which the loop in the transfer needle is moved toward the head of the other knitting needle. The machine is well known without needing to be exemplified, and as shown in FIGS. 4 and 5, the lower needle 19 on the lower hook side
A transfer guide 20 is formed in an overhanging manner on the side surface of the needle stem, and the upper needle 21 on the upper hook side corresponds to the lower needle 19.
The loop knitted by the knitting head 9 is taken off from the knitting head by the raising of the lower needle 19, and is locked across the lower transfer guide 20 and the locking part in the middle of the needle shaft aligned therewith. Enlarge and correspond to this, the upper needle 21
, and insert the hook part into the transfer guide 20 , and then lower the lower needle 19 and insert it through the loop.
By retracting, the loop is transferred to the knitting head side of the upper needle 21, and the loop transferred to the upper needle 21 by the retreat of the upper needle 21 is combined with the loop on the upper needle 2I side. If the knitting needle thickness (needle stem thickness) is Q, 6 mm or more, normal stitch transfer and knitting can be performed without any problem by adjusting the stitch transfer timing of the upper and lower knitting needles.

(Problems to be Solved by the Invention) Recently, with the increase in the gauge of circular knitting machines, the gauge of knitting needles has become even finer, and for example, knitting needles with a needle stem thickness of Q and a thin knitting needle of 4 mm are used. In the case of such thin knitting needles, warping of the knitting needles may occur, and for example, as shown in Figure 4.5, the stitch transfer needle 19 is used on the lower needle on the lower hook side, and the stitch transfer needle 19 is used on the upper needle 21 side as described above. When performing a stitch transfer operation such as this, stitch transfer may be caused by run-out due to the thin needle stem that protrudes from the needle groove of the hook, coarsening of the needle pitch, and a decrease in the amount of needle movement associated with this. When advancing the upper needle 21 toward the needle 19, the upper needle 21
The disadvantage is that the stitches collide and the stitches cannot be transferred smoothly.

For this reason, in the past, the shape of the transfer guide 20 on the side of the transfer needle 19 was changed, or the attachment position with respect to the needle was changed, in order to ensure the reliability of the needle guide by the hook, enlarge the loop, etc. However, there is a problem that sufficient effects cannot be obtained.

(Means for Solving the Problems) In order to achieve smooth and accurate stitch transfer, the present invention rotates and displaces the hook in the circular knitting machine, so that the transfer needles and the corresponding knitting needles This is to ensure proper positioning of the upper pot and/or
Alternatively, in a circular knitting machine in which stitch transfer is performed by appropriately disposing stitch transfer needles having stitch transfer guides on the needle side surfaces of the lower hook in the knitting needle rows, the upper hook and/or the lower hook are moved in the circumferential direction during stitch transfer. The purpose of the present invention is to cause a knitting needle that performs a stitch transfer operation to correspond to the transfer needle in the other hook to directly face the transfer guide portion of the transfer needle in one hook.

(Function) According to the technical means of the present invention, in the device in which the transfer needle is disposed on the lower hook side shown in FIG. A belt 5 is stretched around the drive shaft 3 which is rotatably installed upright parallel to the axis of the drive shaft 3, and an upper hook drive pinion 7 is attached above and below the drive shaft 3.
, a lower hook gear 1 is provided with a lower hook drive pinion 6, and the lower hook drive pinion 6 is integrally attached to the lower hook 16 via a fixing plate 15.
3, and the upper hook drive pinion 7 is meshed with the upper hook gear 14 fixed to the rotating shaft 18 of the upper hook 17, and each drive pinion 6.7 has the same diameter, and the lower hook and upper hook gears 1
3.14 are also of the same diameter, and in the illustrated example, each gear 6.7 and gear 13.14 are shown as eight helical gears. A lower hook drive pinion 6 is fixed to the drive shaft 3, and an upper hook drive pinion 7 is rotatable together with the shaft 3 through engagement with a key fixed to the same shaft 3, and is also freely movable up and down in the axial direction. The slide piece 11 is screwed into the threaded shaft 10 of the stepping motor 9 with a female thread 12 so as to be movable up and down, and the two-pronged guide piece 11a in the slide piece 11 has a hole 11b in the lla.
While loosely inserting the drive shaft 3 and key 8 into Ilb,
The upper hook drive pinion 7 that engages with the key 8 is held between the guide pieces 11a and lla of the slide piece 11, and the rotation of the upper hook drive pinion 7 on the drive shaft 3 causes the upper hook drive pinion 7 to engage with the key 8.
By interlockingly rotating the upper hook gear 14 and the lower hook gear 13, which are meshed with each other, and the lower hook drive pinion 6,
The rotation for knitting the knitted fabric is given to the upper hook 17 and the lower hook 16. Although not shown in the upper hook 17 and lower hook 16, as is known, the upper needle 21 and lower needle 19, which were previously explained in FIG. The lower needles 19 of the lower hook 16 are arranged in rows at equal intervals, and within the group of lower needles 19 of the lower hook 16 are transfer needles 1 with a transfer guide 20 attached to the side of the needle shaft continuing to the head, as shown in FIG.
It goes without saying that 9 is placed as appropriate. 4th first.
As described in FIG. 5, when transferring the knitted loops of the 19 lower needles having the transfer guide 20 to the upper needle 21 side, it is necessary for both needles 19 and 21 to perform the required transfer operation. In this case, the upper needle 21 is properly facing the transfer guide 20 of the lower needle 19, and the head of the upper needle 21 is aligned with the lower needle 19 during the operation.
It is necessary to set the position where the needle can be inserted smoothly without interference between the needle stem and the guide 20, but in the case of the example shown in Fig. 1.2.3 of the present invention, This can be achieved. That is, the upper needle 21 located at position P in FIG. 5 is moved to position Q by the rotational displacement of the upper hook 17. Let L be the moving distance of the upper hook gear 14 in the circumferential direction necessary to displace the upper hook 17 by the distance y, and xl be the lifting distance of the upper hook driving pinion 7 required to move the same gear 14 by the distance y. Also, the same Binion 7
The helix angle of the helical tooth is α, and the diameter of the upper hook gear 14 is D.
2. If the diameter of the upper hook F is Dl, the following formula holds true.

y=tanα×x −・−−−−1・−・・−・−
-(21) From the above equations (11 and (2)), that is, if the moving distance of the upper hook 17 is determined, the lifting distance X of the upper hook drive pinion 7 having the tooth tips 7a is determined (see FIG. 6).

Therefore, by raising the upper hook drive pinion 7 along with the rotation of the screw shaft 10 of the stepping motor 9 and the raising of the slide piece 11 thereby, the upper hook 17 can be rotationally displaced in the circumferential direction by a required distance. , the corresponding upper needle 21 of the upper hook 17 can be placed in the appropriate position for the required stitch transfer with respect to the transfer guide 20 of the lower needle 19 for stitch transfer of the lower hook 16, and a smooth stitch can be achieved. This allows the transfer movement to be performed reliably. That is, according to the present invention, when transferring stitches from the lower needle 19 to the upper needle 21 or from the upper needle 21 to the lower needle 19, the upper hook drive pinion 7 is raised or lowered, and the upper hook 17 is moved as needed. By rotating and displacing the needle by the distance, positional adjustment of the stitch transfer needle and the amount of the needle corresponding to the stitch transfer operation can be achieved reliably and easily. Note that arrow A in FIG. 5 indicates the direction of rotation in this circular knitting machine.

(Example) Various types of means can be considered as the means for rotating and displacing the pot in the present invention, and each example will be explained below in sequence. In the embodiment shown in FIGS. 1 to 3, the upper and lower hook drive pinions 7.
6 and the upper and lower hook gears 14 and 13 are all helical gears, but in the same figure, the upper hook drive pinion 7
Instead, the lower hook drive pinion 6 may be raised or lowered by a similar mechanism, and the lower hook 16 may be rotationally displaced by a required distance to move the lower needle side. In addition, in the same figure, the upper hook drive pinion 7 on the drive shaft 3,
Although the helical gears 6 in the lower hook driving pinion 6 have the same tooth tip twist direction, the tip twist directions of both binions are formed in opposite directions, and the pinions 6 and 7 are moved up and down, respectively. 16. It is also possible to displace the upper hook 17 at the same time. Similarly, 1.2.
In the one shown in Fig. 3, the lower hook drive pinion 6 and the upper hook gear 13 are spur gears, the upper hook 17 and the lower hook 16 are arranged so that they rotate at the same time, and the upper hook drive pinion 7 is rotated in the same manner. It is also possible to rotate the upper hook 17 by moving the upper hook 17.

The embodiment shown in FIG. 7 shows another method of rotationally displacing the lower hook gear 13, in which a vertical screw gear 23 is provided on the lower hook gear 13 via a connecting member 22, and the lower hook driving pinion 6 is connected to the screw gear 23. The lower hook gear 13 is rotationally displaced in the circumferential direction by engaging with the upper hook drive pinion 7 and the upper hook gear 14 in the embodiment shown in FIG. In contrast, the lower hook drive pinion 6 and the lower hook gear 13 use spur gears, and a vertical member 24 is attached to the upper end of the drive shaft 3, and a vertical bearing member 26 attached to the upper and lower screws 25. By raising and lowering the vertical member 24 and raising and lowering the whole (drive shaft side), the upper and lower hooks 17.16 are rotationally displaced via the upper and lower hook gears 14.13. In this embodiment, as a modification, the upper hook drive pinion 7
It is also possible to similarly move the whole body up and down by using the upper hook gear 14 as spur gears and the lower hook drive pinion 6 and lower hook gear 13 as helical gears.

In the embodiment shown in FIG. 9, the lower hook 16 is rotated between the lower hook gear 13 and the lower hook 16, and the lower hook 16 is placed on the lower hook gear 13 as shown in the figure. 13 so as to be rotatable together with and independently of the lower hook gear 13.
Form a and b. Groove a is groove 27 on the valley side and m2 on the gear side
g are formed in a staggered manner, and the grooves are grooves 29 on the valley side.
and 1aiso on the gear side are similarly formed in a staggered manner, so this groove a.

It engages with the grooves 27 and 29 of the hook rim in b and pushes it (
By inserting the movable member 32 having a tapered surface 31 (circumferential direction), the lower hook 16 is moved and displaced in the circumferential direction. When inserting the movable member 32 into the groove a side and rotating the lower hook 16, the direction is counterclockwise.
This is because when the movable member 32 is inserted into the groove side and the lower hook 16 is rotationally displaced, it is rotated in any direction in the circumferential direction, such as clockwise.

The embodiment shown in FIG. 10 uses the upper hook 17 and a rotating shaft 18 that supports and rotates the upper hook 17 to rotate and displace the upper hook 17. In this case, the upper hook 17 is rotated. The mechanism using the grooves a and b and the movable member 32 shown in the figure can be similarly carried out by installing it between the joint end surface C of the post 33 of the rotating shaft 18 and the mounting member 34 of the upper hook 13 as shown in the figure. It is.

The embodiment shown in FIG. 11 is a modification of the type using the helical gear shown in the embodiment of FIG. 1, and is also a modification of the embodiment of FIG. An upper hook driving pinion 7, a lower hook driving pinion 6, an upper hook gear 14 and a lower hook gear 13 that are meshed with these pinions 7 and 6 are provided.
has a reverse helical gear structure as shown in the figure,
In this case, the drive shaft 3
The drive shaft 3 is supported by a vertical bearing 26 that can be freely moved up and down using a vertical member 24 attached to the upper end and a vertical screw 25.
Raise or lower the entire example, upper and lower pots 17.16
are rotated in opposite circumferential directions.

In the embodiment shown in FIG. 12, in the embodiments illustrated so far, the upper and lower hook drive pinions 7.6 are connected to a common drive shaft 3.
Instead of the model in which both pinions 7.6 are held on separate shafts, the upper hook drive pinion 7.
is attached to the drive shaft 3a, and the lower hook drive pinion 6 is attached to the drive shaft 3b.
In addition, both shafts 3a and 3b are driven with synchronous timing, and in order to rotationally displace the upper hook 14 on the valley side to be rotationally displaced, the drive shaft of the upper hook drive pinion 7 is The purpose can be achieved by providing an appropriate displacement (differential) device 35 on the 3a side. Therefore, there is no need to use helical gears in this system.

In the embodiment shown in FIG. 13, the upper hook drive pinion 7 and the lower hook drive pinion 6 are driven on separate shafts, and the rotary hook is rotated and displaced by computer control using a pulse motor or the like. The upper hook drive pinion 7 is connected and held to the drive shaft 3a of a motor M1 such as a pulse motor, as shown in FIG.
Further, the lower hook drive pinion 6 is connected and held to the drive shaft 3b of the motor M2, such as a pulse motor, and a control device 36 equipped with a timing confirmation sensor 35 controls both motors M1.
, M2 can be controlled, and the upper hook gear 14 and lower hook gear 13 are driven from each pinion 7.6 by each motor Mi and M2, and the rotation is continuously performed at the same angular speed while checking the timing of engagement of the upper hook 14 and lower hook 13. During stitch transfer, the motors M1 and M2 are rotated through the control device 36 to perform knitting.
, the upper and lower hooks 17 and 16 are rotated.

In the embodiment shown in FIG. 14, a rotating displacement mechanism for the upper hook F is provided between the rotating shaft 18 of the upper hook 17 and the upper hook gear 14, and the upper hook 17 is rotated as shown in the figure. In the rotating shaft 18 that supports and is connected to the upper hook gear 14, the upper hook gear 14
A displacement guide 38 is provided on the periphery of the disc-shaped stepped portion 37 of the shaft 18 to which the upper hook gear 14 is attached, and a displacement guide 38 is provided on the periphery of the upper hook gear 14 to provide a displacement Jff1 having a tapered surface 39 and 39 for operation, respectively.
40 or 40 is engaged with the side surface of the displacement guide 38, the disc-shaped stepped portion 37 is rotated in its circumferential direction, thereby rotationally displacing the upper hook 17 via the rotating shaft 18. It was designed to allow

(Effects of the Invention) According to the present invention, for increasing the gauge in a circular knitting machine,
This is particularly advantageous because it can eliminate defects in which the upper and lower knitting needles collide during stitch transfer operations between upper and lower knitting needles whose gauge is fine, or in which the head of the other knitting needle is not properly inserted into the transfer guide. In the present invention, the loops are always transferred by rotating and displacing the necessary upper hook and lower hook in the circumferential direction to bring one of the upper and lower transfer knitting needles close to the other, or to bring both of them close to each other. The knitting needle can be smoothly inserted into the stitch transfer guide of the knitting needle having the loop without interference, and accurate and uniform stitch transfer work can be obtained. Moving this hook by a predetermined distance to optimize the meeting timing is significantly more advantageous than improving the shape of the knitting needles or the shape and structure of the transfer guide, or improving the shape of the needle groove in the hook. It is. In other words, modifications to knitting needles and hook needle grooves are necessary due to thinner needle stems and restrictions on the overhang of transfer guides due to higher gauge knitting machines.
A sufficient effect cannot be expected.

On the other hand, by rotating the hook itself in the circumferential direction, the relative position of the upper and lower knitting needles can be regulated extremely accurately without being constrained by the miniaturization of the knitting needle gauge or the narrowing of the needle groove. As shown in the examples and various design examples, the specific structure and device required for the rotational displacement of the device can be selectively adopted, and there are no difficulties in implementation. , which is excellent in that it allows smooth and appropriate stitch transfer operations, which are frequently used in circular knitting machines.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of an embodiment of the present invention using a helical eight gear, Fig. 2 is an oblique view of the upper and lower main parts of the drive binion, Fig. 3 is a side cross-sectional view of the binion holding structure, and Fig. 4 is A perspective view showing the operating state of the transfer knitting needle, FIG. 5 is an explanatory diagram of the relationship between the hook rotational displacement and the needle device according to the present invention, FIG. 6 is an explanatory diagram of the helical eight gears for raising and lowering, and FIGS. 7 to 14 These are explanatory diagrams of respective embodiments of the hook rotation displacement means according to the present invention. 3--Drive shaft, 6-Lower hook drive binion, 7--Upper hook drive binion, 13-Lower hook gear, 14--Upper hook gear, 16-
Lower hook, 17-Upper hook, 18--Rotation shaft, 19--Lower needle for stitch transfer, 20--Guide for stitch transfer, 2t-=Upper needle for stitch transfer.

Claims (1)

[Claims] 1. In a circular knitting machine in which transfer needles having stitch transfer guides on the side surfaces of the needles are appropriately arranged in knitting needle rows in the upper hook and/or lower hook to perform stitch transfer, the upper hook and/or the lower hook are Alternatively, the lower hook is rotated in its circumferential direction, and the knitting needle that performs the stitch transfer operation in correspondence with the stitch transfer needle in the other hook is directly opposed to the stitch transfer guide portion of the stitch transfer needle in one hook. A method for displacing a hook in a circular knitting machine characterized by: