JPH04257351A - Sinker control device - Google Patents

Abstract

PURPOSE:To carry out the control of density of a knitted fabric having uniform stitch without causing end breakage and loosening of yarn and making it possible to elastically operate a sinker even in a case of knitted yarn reduced in elongation and increased in variation of density of knitted fabric. CONSTITUTION:An inside sinker cam 10 is provided in the rear face of a sinker cap 9 and plural outside sinker cams 11 are pivoted so as to form an cam passage 12 of the sinker bat, and a movable ring 24 having partial gear 23 in the sinker cap 9 is inserted and a pinion 28 is provided so as to engage with a gear 24. Plural arc cams 17 are pivoted to the sinker cap 9 so as to be supported each with supporting shaft 18, a roller 19 is provided in the each end part of the each arc cam 17, and a ring spring 20 is wound on the roller 19. Each adjusting lever 21 is provided at the middle part of the each arc cam 17 so as to press and each of control pins 25 is vertically provided in the movable ring 24 so as to contact with the each cam face of the each arc cam 17.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sinker control device for controlling sinker operation in accordance with changes in the stitch count of knitting needles in a circular knitting machine for knitting socks, stockings, etc., for example.

0002

2. Description of the Related Art A sinker control device that has been proposed in this type of circular knitting machine and controls the sinker operation in accordance with changes in the stitch count of knitting needles is constructed as shown in FIGS. 5 and 6. (Japanese Patent Application Laid-Open No. 63-203852).

That is, in FIGS. 5 and 6, a cylinder (knitting machine cylinder) b equipped with knitting needles is fitted into a machine frame a of a circular knitting machine, and a sinker is installed in the upper part of this cylinder b. A bed (not shown) is provided to slide the sinker c in the axial direction of the cylinder b. Further, this sinker bed is provided with a sinker cap (not shown) to hold the butt of the sinker c, and a counter cam d is rotatably fitted on the bottom surface of the sinker cap. ing. moreover,
On the inner circumference of this counter cam d, there are multiple (eight in the figure)
A depression (cam part) e is formed in each depression (cam part) e, and each convex part f1 of a plurality of (four in the figure) outer sinker cams f is attached outwardly by a spring (not shown). Each outer sinker cam f is loosely provided on the back surface of the sinker cap. Furthermore, an inner sinker cam g is provided in a ring shape on the lower surface of the sinker cap inside the outer sinker cam f so as to form a bat cam passage h of the bat.

On the other hand, a drive shaft i is connected to a part of the machine frame a to a sinker control circuit (not shown) that controls the sinker operation in accordance with changes in the number of stitches of the knitting needles.
An actuating arm j is mounted on the drive shaft i, and a crotch portion j1 of the actuating arm j engages with an actuating pin k implanted in the counter cam d.

[0005] Therefore, the sinker control device in the above-mentioned circular knitting machine operates based on commands from the sinker control circuit that controls the sinker operation in accordance with changes in the stitch size of the knitting needles.
When the drive shaft i turns to the right, the actuating arm rod j mounted thereon rotates the actuating pin k to the left around the cylinder b, so that the counter cam d integrated with the actuating pin k
Since each convex part f1 of each outer sinker cam f is brought into contact with each depression e of the bat, the butt cam passage h of the bat is moved outward to control the sinker operation in accordance with the change in the stitch size of the knitting needle. It has become.

On the other hand, the driving shaft i of the sinker control device in the circular knitting machine described above operates the operating arm lever j based on a command from a sinker control circuit that controls the sinker operation in accordance with changes in the stitch count of the knitting needles. Although it has been described that the motor is driven by the output shaft of a pulse motor instead of the drive shaft i, it has already been proposed.

[0007]

[Problems to be Solved by the Invention] However, in the sinker control device in the above-mentioned circular knitting machine, the cylinder b rotates at a high speed, and the centrifugal control of the sinker c is performed in synchronization with the vertical movement of the knitting needles. The butt cam passage h formed by the counter cam d and each outer sinker cam f
The counter cam d and each outer sinker cam f have no leeway with respect to the sinker c, and moreover, the sinker operation is controlled by moving outward to follow the change in the stitch size of the knitting needle. Due to this, due to the knitting yarn with little elongation or the large amount of change in stitch length, thread breakage or yarn slack may occur during knitting, resulting in uneven stitch stitch adjustment, making uniform stitch adjustment impossible. It is difficult to improve quality.

The present invention has been made in view of the above-mentioned circumstances, and the sinker is constructed with a sufficient margin so that it can operate elastically, so that knitting yarns with little elongation or with a large change in stitch size can be fabricated. However, we have developed a sinker control device for circular knitting machines that improves quality by uniformly adjusting the stitch thickness without causing yarn breakage or yarn slack during knitting. The purpose is to provide.

[0009]

[Means for Solving the Problems] The present invention includes a cylinder equipped with knitting needles fitted into a machine frame, and a sinker bed provided on the top of the cylinder so that the sinker slides in the axial direction of the cylinder. and a sinker cap provided to hold a sinker butt in the sinker bed, an inner sinker cam is provided on the back side of the sinker cap, and the sinker cap is provided on the outside of the inner sinker cam. a plurality of outer sinker cams are pivotally mounted to form a butt cam passage; a movable ring having a partial gear is fitted to the sinker cap; a pinion is provided to mesh with the partial gear; A circular arc cam is pivotally mounted on each support shaft, each roller is attached to each end of each of these circular arc cams, a ring spring is wound around each of these rollers, and each adjustment rod is installed in the middle of each of the above circular arc cams. Each of the outer sinker cams is screwed so as to be pushed, and each control pin is vertically provided on the movable ring so as to come into contact with each cam surface of each of the arcuate cams.

0010

[Operation] In the present invention, the knitting needles of a cylinder rotating at high speed move up and down with a cam and knit the fabric in synchronization with each sinker, and the sinker movement follows the change in the stitch size of the knitting needles. Based on commands from the controlling sinker control circuit, when the pinion rotates the partial gear that meshes with it clockwise or counterclockwise, the control pin of the movable ring integrated with the partial gear rotates the cam surfaces of the arc cams inwardly. Or, since it is pushed outward, each of the circular arc cams rotates around the support shaft by the elasticity of the ring spring, and each adjustment rod of each of the circular arc cams receives a centrifugal force from each of the outer sinker cams. The butt cam passage of the sinker is controlled by pushing against the sinker, and the sinker is made to operate elastically, preventing yarn breakage during knitting even if the knitting yarn has little elongation or the amount of change in stitch is large. This system is designed to improve quality by uniformly adjusting the stitch thickness without causing yarn loosening or the like.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to illustrated embodiments.

The embodiment of the present invention is applied to a sinker control device for a circular knitting machine with four yarn feeds, and one of the four yarn feeders will be explained.

In FIGS. 1 to 4, reference numeral 1 denotes a cam holder integrated with the machine frame of a circular knitting machine, and as shown in FIG. 2, inside the cam holder 1 of this machine frame, An upper cam 2a and a lower cam 2b are attached, and a well-known cylinder (knitting machine cylinder) 3 is fitted vertically and rotatably inside the upper cam 2a and lower cam 2b. Further, as shown in FIG. 2, a large number of vertical grooves 3a are formed on the outer periphery of the cylinder 3, and each knitting needle 4 is fitted into each vertical groove 3a so as to be slidable in the vertical direction. has been done. Furthermore, each butt 4a of each knitting needle 4 is held between the upper cam 2a and the lower cam 2b, and the upper cam 2
a and the lower cam 2b are configured to move each knitting needle 4 up and down via each butt 4a of each knitting needle 4. Furthermore, as shown in FIG. 2, a ring-shaped sinker top 5 is provided on the upper part 3b of the cylinder 3 so as to guide each knitting needle 4. A sinker bed 6 is provided so that a sinker 7 is held by a stopper member 8 so as to be slidable in the axial direction of the cylinder 3. Further, as shown in FIGS. 2 and 4, a ring-shaped sinker cap 9 is fixedly provided on the upper part of the sinker bed 6, and a ring-shaped sinker cap 9 is provided on the back side of the sinker cap 9. An inner sinker cam 10 is provided. Further, in the sinker cap 9 on the outside of the inner sinker cam 10, a plurality of (four) outer sinker cams 11 having an arc shape are arranged in the butt cam passage 12 of each butt 7a of each sinker 7.
Each outer sinker cam 1
A U-shaped hook portion 11a is formed at the free end of the sinker bed 6, and the hook portion 11a engages with a locking pin 14 implanted in the sinker bed 6 (see FIG. (see 4). Furthermore, each plate cam 15 is fixed to the sinker bed 6 on the outside of each of the outer sinker cams 11 along substantially the same direction as the sinker cam 11 with a gap 16 therebetween. Reference numeral 15 regulates the operating range of each of the outer sinker cams 11.

Further, as shown in FIG. 4, guide grooves 15a are formed in the middle of each plate cam 15 in the axial direction of the cylinder 3.
An adjustment rod 21, which will be described later, is fitted into the. Further, on the sinker cap 9 beside the support shaft 13, a plurality (four) of circular arc cams 17 are pivotally attached to respective support shafts 18 vertically provided on the sinker cap 9. Each cam surface 17a is a curved surface having a radius of curvature larger than the radius of curvature of the cylinder 3 and is formed outward. Furthermore, each roller 19 is attached to each end 17a of each arc cam 17 forming a substantially U-shaped circumferential groove, and each roller 19 is provided with one ring spring 20.
is elastically wound. In addition, a protruding portion 17b is formed in the middle of each arcuate cam 17, and each roller 19 is attached to each protruding portion 17b by forming a substantially U-shaped circumferential groove. . Furthermore, each adjustment rod 21 such as a headed bolt is attached to each of the guide grooves 15 in each of the protrusions 17b.
The adjustment rods 21 are screwed so as to push the back surface of each of the outer sinker cams 11 through the holes a, and after adjusting the positions of the adjustment rods 21, they are fixed to the respective protrusions 17b with fixing screws 22.

On the other hand, as shown in FIG. 4, a movable ring 24 having a partial gear 23 is rotatably fitted around the outer periphery of the sinker cap 9.
The movable ring 24 located at 7a has a plurality of (four)
control pins 25 are installed vertically, and each control pin 25
are strongly abutted against each of the cam surfaces 17a by the elasticity of the ring spring 20. Further, as shown in FIG. 2, a support plate 26 is provided horizontally on the sinker cap 9, and a pulse motor 27 is provided in a reclining manner on the support plate 26 so as to be reversible. ing. Further, a pinion 28 is mounted on the output shaft 27a of the pulse motor 27, and the pinion 28 meshes with the partial gear 23.

The operation of the present invention will be explained below.

Therefore, the knitting needles 4 of the cylinder 3, which is currently rotating at a high speed, move up and down with the upper cam 2a and the lower cam 2b, knitting the fabric in synchronization with each sinker 7, and the knitting needles 4 When the pulse motor 27 is driven based on a command from a sinker control circuit (not shown) that controls the sinker operation in accordance with changes in the number of stitches, the pinion mounted on the output shaft 27a of the pulse motor 27 is activated. 28 rotates the partial gear 23 that meshes with it clockwise or counterclockwise, so that each control pin 25 of the movable ring 24 integrated with this partial gear 23 moves each cam surface 17a of each arc cam 17 inwardly or outwardly. Push. Then, each of the circular arc cams 17 rotates around the support shaft 18 by the elasticity of the ring spring 20, and the adjusting rod 21 of each of the circular arc cams 17 rotates on the back surface of each of the outer sinker cams 11, which is receiving centrifugal force. sinker 7
Since the sinker 7 is pushed against the force, the butt cam passage 12 of the butt 7a of the sinker 7 is controlled.

As described above, in the present invention, since the operation of each sinker 7 is controlled by the elasticity of the ring spring 20, even if the knitting yarn has little elongation or the amount of change in stitch is large, it will not work during knitting. It is possible to improve the quality by adjusting the stitch thickness evenly and uniformly without causing yarn breakage or loosening of the yarn.

[0019]

[Effects of the Invention] As described above, according to the present invention, there is provided a cylinder fitted with a machine frame and equipped with knitting needles, and a sinker provided on the upper part of the cylinder so as to be slidable in the axial direction of the cylinder. In a circular knitting machine equipped with a sinker bed and a sinker cap provided to hold a sinker butt on the sinker bed, an inner sinker cam is provided on the back side of the sinker cap, and the above sinker cam on the outside of the inner sinker cam is A plurality of outer sinker cams are pivotally connected to the sinker cap to form a butt cam passage,
A movable ring having a partial gear is fitted into the sinker cap, a pinion is provided to mesh with the partial gear, a plurality of circular arc cams are pivotally connected to the sinker cap by respective support shafts, and each of the circular arc cams is Each roller is attached to the end, a ring spring is wound around each roller, each adjustment rod is screwed in the middle of each of the above-mentioned circular arc cams so as to push each of the above-mentioned outer sinker cams, and the above-mentioned movable ring Since each control pin is installed vertically so as to contact each cam surface of each arc cam, it is possible not only to elastically control the operation of the sinker, but also to control the operation of knitting yarns with little elongation and the amount of change in stitch. Even if it gets bigger,
There is no risk of yarn breakage or yarn loosening during knitting, and it has excellent effects such as being able to adjust the stitch thickness evenly and uniformly to improve quality.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of a sinker control device of the present invention.

FIG. 2 is an enlarged sectional view of the same as above.

FIG. 3 is a sectional view taken along the chain line A-A in FIG. 1.

FIG. 4 is a partially cutaway perspective view of the sinker control device of the present invention.

FIG. 5 is a plan view showing a conventional sinker control device.

FIG. 6 is an enlarged plan view showing the main parts in FIG. 5.

[Explanation of symbols]

3 Cylinder 4 Knitting needles 7 Sinker 9. Sinker cap 10 Inner sinker cam 11 Outer sinker cam 12 Bat cam passageway 17 Arc cam 19 Roller 20 Ring spring 21 Adjustment rod 23 Partial gear 24 Movable ring 25 Control pin 27 Pulse motor 28 Pinion

Claims (1)

[Claims] Claim 1: A cylinder equipped with knitting needles fitted into a machine frame; a sinker bed provided on the top of the cylinder so that the sinker slides in the axial direction of the cylinder;
In a circular knitting machine equipped with a sinker cap provided to hold a sinker in this sinker bed, an inner sinker cam provided on the back side of the sinker cap, and a butt cam passageway in the sinker cap outside the inner sinker cam. a plurality of outer sinker cams pivotally connected to form a plurality of outer sinker cams, a movable ring fitted to the sinker cap and having a partial gear, a pinion provided to mesh with the partial gear; A plurality of arcuate cams are pivotally mounted on a support shaft, each roller is attached to each end of each of the arcuate cams, a ring spring is wound around each of the rollers, and the each adjusting rod screwed to push each outer sinker cam;
A sinker control device characterized in that the movable ring is provided with control pins vertically arranged so as to come into contact with the cam surfaces of the arcuate cams.