JPH1053944A - Jacquard device of circular knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the jacquard device of a circular knitting machine, enabling to extremely simply and rapidly change a jacquard route without exchanging a fixed cam by driving a movable cam with a servomotor to move the cam in a groove. SOLUTION: A fixed cam contains a groove 11 and a movable cam 2, and the movable cam 2 is moved to a relatively high position or a relatively low position with a driving mechanism. The driving mechanism includes a cam 80 rotated by driving the servomotor 8, and a crank rod 81 whose one end is pivotally brought into contact with the eccentric position of the cam 80. The other end of the crank rod 81 is pivotally brought into contact with the movable cam 2. The servomotor 8 drives the movable cam 2 to move the cam in the groove 11. Thus, another orbit is formed or not. The other orbit in the jacquard device is preferably an arbitrary orbit among a missed stitch orbit, a needle weaving orbit and a needle-hooking orbit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jacquard device for a kind of circular knitting machine, and more particularly to a jacquard device attached to a circular knitting machine and capable of selectively guiding a knitting needle to a jacquard position or a plain weaving position to enter. Related to the device.

[0002]

2. Description of the Related Art A needle selecting mechanism attached to a circular knitting machine selectively pushes up a vertical needle or a sinker, thereby forming a jacquard pattern knitted fabric having a pile, an opening or a pattern on a cloth surface. This is a well-known technique. The vertical needle or sinker described above operates at a certain empty needle height or knitting height on the cam when not performing jacquard knitting, and the knitting needle or sinker operates at another different knitting height on the cam when performing jacquard knitting. enter in. With traditional techniques, if a knitting needle were to enter another knitting height, a new jacquard mechanism, such as a pattern wheel, would have to be adjusted, and it would already be installed on a circular knitting machine. Cams that need to be replaced as well. Performing such an exchange operation on a circular knitting machine having a large number of cams takes time and effort in exchange, and the exchange efficiency is poor.

US Pat. No. 4,956,981
No. provides a knitting needle with a cam at four positions: needle weaving, hanging needle, empty needle, or collecting needle, and the cam is annularly provided on one rotatable cam sleeve, and the cam is arranged vertically or horizontally. Are tightly overlapped with each other and fitted to form an integral body, so that merely rotating the cam sleeve enables a necessary needle height to be obtained when required and a knitting needle to reach a required working height. Met. However, this design allows the required needlework position to be obtained without replacing the cam, but is relatively inconvenient in use because many cam sleeves must be manually adjusted.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a jacquard device capable of providing another kind of jacquard path without replacing one kind of cam. The jacquard device includes one movable cam that can reciprocate along one predetermined direction on the fixed cam and can form another needle height, and one drive used to drive the movement of the movable cam. It is assumed that a mechanism is provided so that when the user needs another kind of needle weaving height, the user can move the above-mentioned movable cam to obtain the necessary needle weaving height immediately without changing the cam.

Another object of the present invention is to provide a jacquard device which can change the jacquard path very easily and quickly. That is, the driving mechanism for driving the movement of the movable cam is constituted by one step motor and a crank rod, whereby the adjusting operation can be quickly performed by a computer or a digital control system.

[0006]

The invention according to claim 1 has an empty needle track 5 and a needle cloth track 4 for guiding the knitting needle 3 to the empty needle height and the needle cloth height, and is fixed to a circular knitting machine. Fixed cam 1
Wherein the fixed cam 1 includes at least one groove portion 11 and a movable cam 2 that is disposed in the groove portion 11 and is movable in the groove portion 11. The movable cam 2 may be used to move within the groove 11 to one relatively high position to form another track different from the above-mentioned track, or
The movable cam 2 is moved by one drive mechanism to the above-mentioned relatively high or relatively low position without moving to another another relatively low position and forming the another one orbit. The drive mechanism includes one servo motor 8, one cam 80 rotated by the drive of the servo motor 8, and a crank rod 81 having one end pivotally connected to an eccentric position of the cam 80, wherein the crank rod 81 includes: The other end of the rod 81 is pivotally connected to the movable cam 2, and the servomotor 8 drives the movable cam 2 to move in the groove 11, thereby forming or not forming the above-mentioned another track. And a jacquard device for a circular knitting machine.

According to a second aspect of the present invention, there is provided a jacquard device for a circular knitting machine according to the first aspect, wherein one orbit other than the orbit is an empty needle track 5, a needle cloth track 4, or a hook needle track 6. A jacquard device for a circular knitting machine, wherein the jacquard device is any one of the above.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Please refer to FIG. The jacquard device of the present invention is formed by combining one fixed cam 1, a movable cam 2, and a drive mechanism used to drive the movable cam 2.

The fixed cam 1 is set at a fixed point on the outer periphery of the cylinder of the circular knitting machine. As shown in FIG. A plurality of tracks used to guide the needles 31 or the needles of the knitting needles 3 are provided.
The trajectory includes at least a needle trajectory 4 for raising the knitting needle 3 to reach the needle height, and an empty needle trajectory 5 for maintaining the needle 3 at the empty needle height. Each of the above-described needle trajectory 4 and the empty needle trajectory 5 is a groove of the same width to be fitted on the inner surface 10,
The plurality of fixed cams 1 are connected so as to be annularly arranged outside the circumference of the cylinder, so that the own orbits are connected to each other,
On the outside of the cylinder of the circular knitting machine, a trajectory that starts again after making a round is completed. Thereby, when the fixed cams 1 arranged in an annular shape relatively move around the circular cylinder, the knitting needle 3 performs the needle-weaving operation of the needle-out or the needle-collecting in accordance with the undulation of the track.

A feature of the present invention is that the above-described predetermined needle trajectory 4
Another advantage of the present invention is that it is possible to provide another type of jacquard track that can be formed immediately when needed, in addition to the empty needle track 5. In the present invention, a description will be given by taking as an example a hooking needle track that allows the knitting needle 3 to reach the hooking needle height. The hooking needle track 6 is formed from the upper edge of the movable cam 2 installed on the fixed cam 1, The cam 2 has at least a rising surface 21 for bringing the knitting needle 3 to the hooking needle height.
And a horizontal hooking needle surface 2 for maintaining the knitting needle 3 at a hooking needle height for a certain time.
The movable cam 2 is arbitrarily movable in one groove 11 on the back surface of the fixed cam 1 and has one
(See FIG. 4) or a relatively high position where the hook needle track 6 is formed. In order to ensure accuracy and flatness when moving the movable cam 2,
It is preferable that a concave groove 23 and a protruding convex rail 110 are provided on the contact surface between the movable cam 2 and the groove portion 11, respectively. When the movable cam 2 is pushed up and reaches the hook height, the rising surface 21 and the hook surface 22 are fixed to the fixed cam 1.
The upper one convex plate 12 and the bat 31 maintain a distance through which the band can pass, and a band-shaped space formed by these distances is a so-called hanging needle track 6.

As shown in FIG. 5, the fixed cam 1 and the movable cam 2 are mounted on one mounting sheet 13,
Further, the mounting sheet 13 is mounted at an appropriate place on the circular knitting machine. Among them, the mounting sheet 13 is further provided with a driving mechanism used to drive the movement of the movable cam 2 described above. The drive mechanism includes one servomotor 8, a cam 80 driven and rotated by the servomotor 8, and a crank rod 81 having one end pivotally connected to an eccentric position of the cam 80. The other end of the crank rod 81 pivotally contacts the movable cam 2. Thus, if the user wants to increase the hanging needle track 6, simply use a computer or other digital control method.
What is necessary is just to drive and operate the servomotor 8 quickly, and to raise the movable cam 2 to the altitude at which the hanging needle track 6 is formed. One positioning gate plate 82 and one position detector 83 are further provided at the tail end of the driving shaft of the servo motor 8 described above.
Are fixed, and wing pieces 821 and 822 that can pass through the position detector 83 are provided at both ends of the positioning gate plate 82. Each time the cam 80 rotates by 180 degrees, one of the two wing pieces 821 and 822
To the position. The position detector 83 is a kind of photoelectric element or another member having the same effect,
Therefore, it is possible to know from the position detector 83 whether or not the movable cam 2 has reached an accurate position.

As shown in FIG. 6, when the needle selector (not shown) does not push the needle push bar 7 for pushing up the needle, the upper butt 71 and the lower bat of the needle push bar 7 are not moved. Reference numeral 72 contacts the needle woven convex plate 14 or the hook needle convex plate 15 on the fixed cam 1, and the butt 31 of the knitting needle 3 moves along the horizontal empty needle track 5. Conversely, when the needle selector pushes and moves the needle push bar 7 to the inclined state shown in FIG. 8, the upper butt 71 above the needle push bar 7 fits into the needle-woven convex plate 14 and gradually rises, At the same time, the knitting needle 3 is pushed up to reach the knitting orbit 4 at the upper edge of the convex plate 12, whereby the knitting operation is advanced. Finally, when the needle selector pushes up the needle push bar 7 to the inclined state shown in FIG. 11, the lower butt 72 of the needle push bar 7 fits into the hooking needle convex plate 15 and gradually rises. At the same time
The movable cam 2 is also pushed up to the position shown in FIG.
The bat 31 of the knitting needle 3 reaches the hooking needle height along the rising surface 21 and the hooking needle surface 22, and the knitting needle 3 proceeds with the hooking operation, and proceeds with the jacquard knitting operation.

[0013]

According to the present invention, there is no need to replace the fixed cam,
By using a drive mechanism and a movable cam when necessary, another necessary Jacquard trajectory can be increased in addition to the default trajectory,
As a result, the jacquard fabric produced by the circular knitting machine has a further change. For example, as shown in the above-described embodiment, the empty needle or the needle stitch is originally changed to a hanging needle structure. Naturally, the above-described embodiments and the formation of the knitting path thereof are used to explain the technical contents of the present invention, and do not limit the scope of the present invention. Other changes in the knitting path performed according to the present invention also belong to the technical scope of the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view of a local structure of the present invention, showing the structure of a fixed cam and a movable cam and their correlation positions.

FIG. 2 is a rear view of the fixed cam of the present invention.

FIG. 3 is a perspective view of the present invention, showing a situation where a driving mechanism raises a movable cam.

FIG. 4 is another perspective view of the present invention, showing a situation where the movable cam has not yet been raised.

FIG. 5 is a structural view of the present invention in a side view, showing a jacquard device mounted on one mounting sheet.

FIG. 6 is an operation display diagram of the present invention, showing a situation where the knitting needle is positioned at the air-core altitude when the needle is not raised.

FIG. 7 is an operation display diagram of the present invention, showing a state where the knitting needle has reached a knitting height when the knitting needle has risen.

FIG. 8 is a side view when the knitting needle of FIG. 7 is at the position AA.

FIG. 9 is a side view when the knitting needle in FIG. 7 is at a position BB.

FIG. 10 is an operation display diagram of the present invention, showing a situation where the knitting needle has reached the jacquard height.

FIG. 11 is a side view when the knitting needle in FIG. 10 is at the position AA.

FIG. 12 is a side view when the knitting needle in FIG. 10 is at a position BB.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Fixed cam 10 ... Inner surface 11 ... Groove part
110 ... convex rail 12 ... convex plate 13 ... mounting sheet 14 ...
・ Knitting convex plate 15 ・ ・ ・ Hanging needle convex plate 2 ・ ・ ・ Movable cam 21 ・ ・ ・ Rising surface 22 ・ ・ ・ Hanging needle surface 23 ・ ・ ・ Ditch groove 3 ・ ・ ・ Knitting needle 3
DESCRIPTION OF SYMBOLS 1 ... Bat 4 ... Needle trajectory 5 ... Empty needle trajectory 6 ... Hanging needle trajectory 7 ... Needle pushing bar 71 ... Upper bat 72 ... Lower bat 8 ... Servo motor 81 ... crank rod 82 ... positioning gate plate 821, 822 ... wing piece 83 ... position detector

Claims (2)

[Claims] 1. A circular knitting machine provided with a fixed cam 1 fixed to a circular knitting machine, having an empty needle orbit 5 and a needle orbit 4 for guiding the knitting needle 3 to the empty and altitude. The fixed cam 1 includes at least one groove 11 and a movable cam 2 disposed in the groove 11 and movable in the groove 11. To move to one relatively high position to form another trajectory different from the aforementioned trajectory, or to move within the groove 11 to form another relatively low trajectory. The movable cam 2 is moved to the above-mentioned relatively high position or relatively low position by one driving mechanism, and this driving mechanism
One servo motor 8, one cam 80 rotated by the drive of the servo motor 8, and a crank rod 81 having one end pivotally connected to the eccentric position of the cam 80, wherein another end of the crank rod 81 is The circular knitting machine is characterized in that it is pivotally connected to the movable cam 2 and the servomotor 8 drives the movable cam 2 to move in the groove portion 11 so as to form or not to form the other one orbit. Machine jacquard device. 2. A jacquard device for a circular knitting machine according to claim 1,
A jacquard device for a circular knitting machine, wherein one of the tracks and another track is any one of an empty needle track 5, a needlework track 4, and a hanging needle track 6.