KR20090027427A - Yarn loop density adjustment apparatus for circular knitting machines - Google Patents

Abstract

An apparatus for adjusting loop density of a yarn for a circular knitting machine is provided to maintain and control a location of a cam and to prevent mistakes caused by manual adjustment of the location. An apparatus for adjusting loop density of a yarn for a circular knitting machine which has one or more needle in order to get a yarn comprises the followings: a transmission mechanism; a slider(22) driven with the transmission mechanism; a saddle sheet(20) having a fastened cam(23) to guide the needle; and a driving unit(30) installed on the saddle sheet to drive the transmission mechanism. The transmission mechanism has a first groove unit and a second groove unit corresponding to the first groove unit. The transmission mechanism is a gear set.

Description

YARN LOOP DENSITY ADJUSTMENT APPARATUS FOR CIRCULAR KNITTING MACHINES}

TECHNICAL FIELD The present invention relates to a spinning yarn loop density adjusting device for circular knitting machines, and more particularly, to a spinning yarn loop density adjusting device capable of adjusting individual cams on a saddle seat.

Circular knitting machines can control the yarn loop density of the fiber by adjusting the position of the cam. Circular knitting machines have a plurality of cams for adjusting the yarn loop density at different locations of the fiber. The prior art mostly aims at the positioning of a single cam. For example, Chinese Utility Patent Nos. M251848 and M247597 disclose an adjustment method having an adjustment wheel rotatable to drive a slider to adjust the position of the cam. This adjustment is made manually. When the number of cams to be adjusted is large, the adjustment work requires a lot of work manpower and time. Human error can also occur. In order to overcome this problem, US Pat. No. 5,511,392 discloses a method in which saddle sheets supporting a cam and positioned on the mounting plate can be moved up and down by including lifting means for adjusting the vertical position of the mounting plate. do. This makes it possible to adjust the vertical position of multiple cams, but not finely adjust the yarn loop density of the individual fiber regions.

U.S. Pat.No. 7,065,988 discloses an apparatus aimed at changing the tightness of the stitches of circular knitting machines. It is a movement adjuster that is slidable on the cam box of the knitting machine and connected to a slider that supports a knockover cam. The movement adjuster includes an actuator connected to the adjustment cam, which may be driven to rotate the adjustment cam at a selected angle with respect to its axis. The adjustment cam has an external active profile and two cam followers located on the slider. When the adjustment cam is driven by an actuator, the two cam followers adjust the cam position on the slider. This aims to adjust the position of a single cam independently of the vertical movement of the mounting plate. The actuator also provides drive without the uncertainty of human control and cumbersome operation. The adjustment cam is an eccentric cam in contact with the two cam followers. Contact locations must be accurately calculated and manufactured to ensure that the cam can provide accurate movement. In addition, the adjustment cam is embedded deep within the saddle sheet. Its size and range of travel paths are limited. Therefore, manufacturing is difficult.

It is a first object of the present invention to provide positioning of a single cam. This makes the construction easier and simpler to manufacture and install in practice. In order to achieve this object, the present invention provides a spinning yarn loop density adjusting apparatus for circular knitting machines. It is installed on a circular knitting machine having at least one needle for pulling out the knitting yarn for knitting. The spun loop density device comprises a saddle sheet coupled to the circular knitting machine and drive means installed on the saddle sheet. The saddle sheet has a transmission mechanism driven by the drive means, a slider driven by the transmission mechanism, and a cam fastened to the slider to guide the movement of the needle. An elastic member is positioned between the slider and the saddle sheet to maintain the slider in contact with the transmission mechanism. The transmission mechanism has a first tooth. The slider has a second tooth corresponding to the first tooth. When the transmission mechanism is driven by the drive means, through the interlocking of the first tooth and the second tooth, the slider can be driven to generate a displacement. By means of the transmission mechanism and the mating teeth formed on the slider, the position of the cam can be precisely adjusted.

 Another object of the present invention is to avoid mistakes due to manual adjustment of the cam position, to maintain the position of the cam and to adjust it at any time during the operation of the circular knitting machine. In order to achieve this object, the present invention further includes a detecting means for detecting a driving condition of the driving means. The detection means generates a detection signal in accordance with the driving conditions of the drive means and inputs it to the processing unit. The processing unit feeds back an adjustment signal based on the detection signal to the driving means to adjust its driving conditions. The driving condition is the rotational speed of the driving means. The processing unit may reset the standard signal for determining the cam position and compare the detection signal with the output of the adjustment signal. Therefore, the cam can be moved to the reset position via the standard signal during the operation of the circular knitting machine. Alternatively, the cam position can be changed during operation of the circular knitting machine to change the yarn loop density to produce more diverse patterns of fibers.

Other objects, features and advantages of the present invention as well as those mentioned above will be more clearly understood from the following detailed description with reference to the accompanying drawings.

Reference is made to FIGS. 1, 2 and 3 for one embodiment of the present invention. The spun yarn loop density adjusting device for circular knitting machines of the present invention is installed on a circular knitting machine having at least one needle (not shown) for pulling out the spun yarn for knitting. The spun loop density adjusting device comprises a saddle sheet 20 coupled on the circular knitting machine and a drive means 30 mounted on the saddle sheet 20. The saddle sheet 20 is provided with a transmission mechanism 21 driven by the drive means 30, a slider 22 driven by the transmission mechanism 21 and the slider 22 to guide movement of the needle. ) Has a cam 23 tightened.

In this embodiment, the drive means 30 is a server motor for providing a drive source of the transmission mechanism 21. The transmission mechanism 21 is coupled to and driven by the first gear 211 driven by the slider 22 and the drive means 30, thereby driving the second gear 212 to drive the first gear. It is a gear set including). The first gear 211 has a first tooth 211a formed thereon. The slider 22 has a second tooth 221 that mates with the first tooth 211a. In addition, the first gear 211 further includes a third tooth portion 211b. The second gear 212 has a fourth tooth 212a that is mated with the third tooth 211b. When the driving means 30 drives the second gear 212, the first gear 211 is driven and rotates through engagement of the fourth tooth 212a and the third tooth 211b. . Through engagement of the first tooth 211a of the first gear 211 and the second tooth 221 of the slider 22, the slider 22 is driven to generate a displacement.

 Elastic member 222 for pushing the slider 22 into contact with the transmission mechanism 21 to prevent incomplete engagement due to a tolerance between the second tooth 221 and the first tooth 211a. May be located between the slider 22 and the saddle sheet 20. In the case of the incomplete coupling, an error may be caused in the displacement of the slider 22 driven by the drive means 30 via the transmission mechanism 21. In this embodiment, the saddle sheet 20 has a track 24 for maintaining the movement of the slider 22. The elastic member 222 has one end coupled with the slider 22 and the other end coupled with the bottom 241 of the track 24. The elastic member 222 provides a force for pushing the slider 22 so that the slider 22 is in contact with the first gear 211, the second tooth 221 of the slider 22 And the engagement between the first tooth 211a of the first gear 211 becomes tighter and harder. Therefore, when the transmission mechanism 21 rotates, it can accurately drive the slider 22 to produce the desired movement displacement.

Reference is made to FIGS. 4 and 5 for another embodiment of the present invention. The spun loop density adjusting apparatus for circular knitting machines further includes a detecting means 40 located on the driving means 30 for detecting the driving condition thereof. The detection means 40 is used on a drive means 30 comprising a stepping motor or a server motor. The detection means 40 comprises an optical grid disk 41 driven by the drive means 30 and rotated therewith, a light emitter 42 and a light receiver 43 located on the light emission path. The optical grid disk 41 has a plurality of scale holes 411 equally spaced apart from each other, which allows the light emitted from the light emitter 42 to reach the light receiving portion 43. will be. When the optical grid disk 41 is driven and rotated by the drive means 30, the light emitted from the light emitter 42 passes through or is blocked by the spaced scale hole 411. Therefore, the rotation angle and rotation speed can be calculated based on the number and frequency of the spaced lights.

To aid in the interpretation and determination of the rotational position of the optical grid disk 41, the optical grid disk 41 further includes a start hole 412. The detection means 40 has a starting point sensor 44 corresponding to the starting hole 412. External light stimulates the starting point sensor 44 through the starting hole 412 so that detection can be performed to indicate that the optical grid disk 41 has finished one cycle of rotation or is positioned at the starting point position. do.

Referring to FIG. 6, a signal block diagram illustrating another embodiment of the present invention is shown. The detection means 40 is electrically connected to the processing unit 50. As described above, the detection means 40 comprises a light receiving portion 43 and a starting point sensor 44. The light receiving portion 43 detects a driving condition of the driving means 30 and generates a first detection signal A. FIG. The driving condition may be a rotational speed and a direction. The start point sensor 44 detects the start hole 412 of the optical grid disk 41 and generates a second detection signal B. The first and second detection signals A and B are input to the processing unit 50, which resets the standard signal C via the input device 51 to determine the position of the cam 23. can do. The input device 51 may be a keyboard, a mouse, or a touch panel. The input device 51 is referred to for reference and does not limit the invention. The detection signal (A) or (B) input to the processing unit 50 is compared with the standard signal C, and an adjustment signal D is returned to the driving means 30 to adjust the driving conditions. do.

Before or during the operation of the circular knitting machine of the present invention, a standard signal C for determining the position of the cam 23 is input to the processing unit 50 through the input device 51, and The adjustment signal D is output to the driving means 30 in order to activate or adjust the driving conditions of the driving means 30. The drive means 30 is a server motor. The rotation speed or direction can be changed based on the adjustment signal D. The server motor drives the second gear 212 to rotate, and through the engagement of the fourth tooth 212a and the third tooth 211b, the rotation is transmitted to the first gear 211. . Thus, through the engagement between the first tooth 211 and the second tooth 221, the slider 22 can be moved to a desired displacement. Referring to FIG. 7A, when the server motor rotates clockwise, the slider 22 is moved downward along the track 24 of the saddle sheet 20. On the other hand, when the server motor rotates counterclockwise, the slider 22 is moved upward along the track 24 of the saddle sheet 20 as shown in FIG. 7B. Since the cam 23 is fastened to the slider 22, when the slider 22 is moved along the track 24 of the saddle sheet 20, the cam 23 is also moved up or down. . During operation of the circular knitting machine, the detection means 40 continuously detects the driving conditions of the drive means 30 including the rotational speed or direction. Since the optical grid disc 41 is coupled with the driving means 30 (see FIGS. 7A and 7B), the detection is performed to indicate the driving conditions of the driving means 30 or the actual position of the cam 23. Signals A and B may be input to the processing unit 50 through the light receiving portion 43 and the starting point sensor 44. The driving condition of the driving means 30 is detectable through the light receiving portion 43 and the starting point sensor 44, and the reset driving condition is compared with the detection signals (A) and (B) and the standard signal (C). Since it can be set via the input device 51, the adjustment signal D can be conveyed to the driving means 30 to adjust the driving condition of the driving means 30 to a reset condition, and the cam ( 23 may be moved to the reset position.

In conclusion, the spinning loop density adjusting device for the circular knitting machine of the present invention can adjust the position of the single cam 23 to control the spinning loop density in order to manufacture fibers in a more diverse pattern. The position of the cam 23 can be adjusted via a simple set of gears for driving the movement of the slider 22. This significantly reduces manufacturing difficulties. In cooperation with the detection means 40 for detecting the driving condition, the displacement of the cam 23 can be precisely adjusted. The present invention therefore provides a significant improvement over the prior art.

Preferred embodiments of the present invention have been described for purposes of disclosure, and those skilled in the art can make modifications to the disclosed and other embodiments of the present invention. Accordingly, the appended claims cover all embodiments without departing from the spirit and basic gist of the present invention.

1 is a perspective view showing an embodiment of a spinning yarn loop density adjusting device of a circular knitting machine according to the present invention.

Figure 2 is an exploded view showing an embodiment of the spinning yarn loop density adjusting device of the circular knitting machine according to the present invention.

Figure 3 is another exploded view showing an embodiment of the spinning yarn loop density adjusting apparatus of the circular knitting machine according to the present invention.

Figure 4 is a perspective view showing another embodiment of the spinning yarn loop density adjusting apparatus of the circular knitting machine according to the present invention.

Figure 5 is an exploded view showing another embodiment of the spinning yarn loop density adjusting device of the circular knitting machine according to the present invention.

Figure 6 is a single block diagram showing another embodiment of the spinning yarn loop density adjustment apparatus of the circular knitting machine according to the present invention.

Figure 7a is a schematic diagram showing an operating state of another embodiment of the spinning yarn loop density adjusting apparatus of the circular knitting machine according to the present invention.

Figure 7b is a schematic diagram showing another operating state of another embodiment of the spinning yarn loop density adjusting apparatus of the circular knitting machine according to the present invention.

Claims (10)

A saddle sheet coupled to a circular knitting machine and having a transfer mechanism, a slider driven by the transfer mechanism, and a cam tightened to the slider to guide movement of the needle; And Drive means installed on the saddle sheet for driving the transmission mechanism; Wherein the transmission mechanism has a first tooth, the slider has a second tooth corresponding to and engageable with the first tooth, and the transmission mechanism is engaged through engagement between the first tooth and the second tooth. It is driven by the drive means to generate a displacement displacement, characterized in that for moving the slider, A spinning yarn loop density adjusting device for a circular knitting machine, installed on a circular knitting machine having at least one needle to pull out the yarn. 2. The spinning yarn loop density adjusting device of claim 1, wherein the transmission mechanism is a gear set. 2. An apparatus as claimed in claim 1, wherein an elastic means is positioned between the slider and the saddle sheet to push the slider into contact with the transmission mechanism. The spinning yarn loop density adjusting device according to claim 1, wherein the driving means is a server motor. Coupled on a circular knitting machine, having a transfer mechanism, a slider driven by the transfer mechanism, and a cam fastened to the slider, the transfer mechanism having a first tooth, the slider corresponding to the first tooth A saddle sheet configured to have a second tooth; Drive means installed on the saddle sheet to drive the transmission mechanism; And Detection means located on the drive means for detecting a drive condition of the drive means; Here, the detection means generates a detection signal in accordance with a driving condition of the driving means, and inputs the detection signal to a processing unit which feeds back an adjustment signal based on the detection signal to the driving means in order to adjust the driving condition. Characterized in that, A spun loop density adjusting device for circular knitting machines, installed on a circular knitting machine. 6. The spinning yarn loop density adjusting device of claim 5, wherein the transmission mechanism is a gear set. 6. An apparatus as claimed in claim 5, wherein an elastic means is positioned between the slider and the saddle sheet to push the slider into contact with the transmission mechanism. 6. The spinning yarn loop density adjusting device according to claim 5, wherein the driving means is a server motor. 6. The spinning yarn loop density adjusting device according to claim 5, wherein the driving means is a stepping motor. 6. The spinning yarn loop density adjusting device according to claim 5, wherein the processing unit resets a standard signal to determine the position of the cam, and outputs the adjustment signal after comparison with the detection signal.

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