JPS602223Y2 - Fabric pull-down device on circular knitting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a pull-down roller drive device for feeding a knitted fabric knitted by a circular knitting machine.

When pulling down the knitted fabric knitted with a circular knitting machine by a pull-down roller installed at the bottom of the knitting machine body while applying an appropriate tension to the fabric, conventionally a pull-down roller was installed as a device to give rotation to the pull-down roller. Separately from this turntable, a cylindrical end cam is fixed along the outer periphery of the turntable, and a roller pulls down a swinging lever that swings while contacting the end cam as the turntable rotates. The lever was pivoted at the end, and the movement of this lever was transmitted to the pull-down roller, causing the pull-down roller to rotate.

Therefore, in circular knitting machines that knit large-sized fabrics, the width of the pull-down roller must be made longer and the cylindrical end cams must be made larger accordingly, and circular knitting machines that knit small-sized fabrics must be made larger. In this case, the width of the pull-down roller must be shortened so that the operator can return the message to the fabric knitting department of the circular knitting machine, and the end cams must be made smaller accordingly. Manufacturing had the disadvantage of making the machine expensive.

Furthermore, since the cam has a cylindrical shape and the gap between it and the turntable is small, it is difficult to clean fries and other debris accumulated on the turntable.

The present invention was made to solve the above-mentioned drawbacks, and the cam that rotates the pull-down roller of the knitted fabric is a small-diameter plate-shaped cam having a star-shaped polygon, and is mounted at the lower center of the circular knitting machine body. A lever that is fixed and swings in contact with this cam is pivotally supported on a turntable, and the swinging of this lever rotates the pull-down roller.The plate-shaped cam can be used regardless of the size of the knitted fabric. The length of the swing lever is kept constant, and the length of the swing lever is changed to correspond to changes in the length of the pull-down roller.

Next, embodiments of the present invention will be described based on the drawings.

1 is a base integrally constructed with the main body of the circular knitting machine; 2 is a plate-shaped cam having a star-shaped polygon fixed horizontally at the center of the base and having a smaller diameter than a large gear to be described later; Reference numeral 3 denotes a large gear fixed to the lower surface of a turntable 4, which will be described later, with its axis aligned.

4 is installed in the knitted fabric knitting section of the circular knitting machine by supporting the shaft in the horizontal direction on the circular knitting machine main body so that its axis coincides with the plate-like cam 2 at a position directly above the plate-like cam 2 at the lower part of the circular knitting machine main body. This is a turntable that rotates in synchronization with the cylinder that is being used.

Reference numeral 5 denotes a driving gear rotatably driven by an electric motor 11, which will be described later, which is rotatably supported on the circular knitting machine main body with a vertical axis, and is rotated via two intermediate gears 6 and 7 that are also supported on the circular knitting machine main body with a vertical axis. The large gear 3 is rotated.

8, 9, and 10 are horizontally supported on the turntable by two brackets 12 and 13 fixed at both ends on the turntable, and are pulled down while applying appropriate tension to the knitted fabric. The three pull-down rollers have grooves cut in the axial direction on the outer cylindrical surface.

These three pull-down rollers are arranged in parallel and are mounted so that the gap between them can be adjusted in a horizontal plane.

Further, the three pull-down rollers are connected to each other so that only the middle pull-down roller 9 rotates in the opposite direction by having a gear (not shown) attached to each shaft end.

Reference numeral 14 denotes a swinging lever pivotally supported on the lower surface of the large gear 3 so as to be able to swing in a horizontal plane.A roller 25 that contacts the plate-like cam 2 is attached to one end, and the other end is attached to the turntable 4.
It has reached near the outer periphery of.

Reference numeral 15 indicates the swing lever 1 with the plate-shaped cam 2 sandwiched therebetween.
A swinging lever is pivotally supported on the lower surface of the large gear 3 at a position symmetrical to the roller 25, and a roller 26 similar to the roller 25 is mounted at one end.
is attached and in contact with the plate-shaped cam 2.

The contact positions of the two rollers 25 and 26 with respect to the plate-shaped cam 2 are such that, for example, when the roller 25 is in contact with the peaks of the cam, the roller 26 is in contact with the valleys of the cam.

Further, a tension spring 27 is tensioned between the two swing levers 14 and 15, and the levers 14 and 15 are urged to be drawn toward each other, and the two rollers 25 and 26
Both are in pressure contact with the cam 2 at all times.

A first lever 16 is pivotally supported at one end of the pull-down roller 8 within the bracket 12, and extends downward through a notch 28 of the turntable 4 carved just below the bracket 12, and extends downward from the turntable 4. It is connected by a rod 19 to the outer end of the swing lever 14 which reaches close to the outer periphery of the swing lever 4 .

A second lever 17 is pivotally supported at the end of the pull-down roller 8 in the same way as the louver 16, and comes into contact with a protrusion projecting from the center of the louver 16 at point A.

A ratchet wheel 18 is secured to the outermost end of the pull-down roller 8 with a key, and is engaged with a first pawl 22 that is pivotally supported at the center of the second lever 17 by a pin 29.

The first pawl 22 is constantly pressed against the ratchet wheel 18 by a spring (not shown) attached to the second lever 17.

30 is a screw shaft rotatably attached to the bracket 12 at a position facing the second lever 17; 24 is a spring hook screwed onto the screw shaft; the tension spring 20 is connected to the second lever 17; is installed.

23 is a grip fixed to the tip of the screw shaft, and by turning this grip and changing the position of the spring hook, the tension spring 2
Adjust the tension at 0.

21 is pivotally connected to the bracket 12 while being engaged with the ratchet wheel 18 in order to prevent the ratchet wheel 18 from rotating clockwise in the drawing, and is constantly pressed against the ratchet wheel by a spring (not shown). This is the second claw.

and a third lever 16 attached to the pull-down roller 8.
, second lever 17, ratchet wheel 18, first pawl 2
2. A second claw 21 also attached to the bracket 12;
Screw shaft 30, spring hook 24, grip 23, and tension spring 20
A mechanism exactly the same as that is provided symmetrically within the bracket 13, and a lever corresponding to the first lever 16 is coupled to the swinging lever 15.

31 is a moving table on which the electric motor 11 is attached in a hanging manner; 32;
3 is a conical stopping side disc of a pulley that is attached to the output shaft of the electric motor 11 and changes the rotation speed steplessly;
Reference numeral 3 denotes a conical movable side disk of a pulley that is fitted onto the outer periphery of the inner boss portion of the disk 32 and is slidable in the axial direction of the motor; these two disks are mounted with their conical surfaces facing each other. It forms the pulley for the V-belt.

Reference numeral 34 denotes a cap that is fitted onto the outer periphery of the outer boss portion of the stop-side disk 32 and is integrally connected to the movable-side disk 33, and a compression spring 35 is inserted between the cap and the stop-side disk. The movable disk 33 is always urged toward the stationary disk.

36 is a gear shaft supported on the main body of the circular knitting machine with an axis in the vertical direction; 37 is a belt pulley attached to the gear shaft 36 at a position facing the pulley; 38 is a belt pulley that is hung between these pulleys; Tension is applied by the spring 35 so that the belt always moves on the conical surfaces of the movable side disk 33 and the stationary side disk 32 in the outer circumferential direction.

The rotation by the electric motor 11 is transmitted from the pulley 37 and the gear of the gear shaft 36 to the drive gear 5 via a connection mechanism (not shown).

39 is attached to the circular knitting machine body at a position below the movable table 31. A bracket 40 is attached to the upper surface of the movable disk 3.
3 and a slope with an angle determined by the inclination angle of the conical part of the movable disk, and is a fixed table on which the movable table 31 is placed and moves the movable table 31 along the slope.

The fixed base is fixed on the bracket in the direction in which the movable base 31 descends when the movable base 31 moves closer to the pulley 37.

Reference numeral 41 denotes a screw shaft which is supported by the fixed base so as to be rotatable only along the slope, and has a spanner hook carved into the end thereof.

Reference numeral 42 denotes a female screw protruding from the lower surface of the movable table 31, and is screwed into the screw shaft 41.

When the movable table 31 is moved in a direction away from the pulley 37 by rotating the screw shaft 41, for example, the belt 38 has a constant length and a constant width, so the movable disk 33 is pushed toward the electric motor and stopped. While the distance between the side disk 32 and the movable side disk is widened, they come into contact with the conical portions of both disks near the center, converting the rotational speed of the motor and transmitting it to the pulley 37.

Next, the effect will be explained.

By manually operating the screw shaft 41 and moving the movable table 31, the contact position between the conical stop side disk 32 and movable side disk 33 and the belt 38 is changed, and the large gear 3 is rotated at an appropriate rotation speed. Assume that it is rotating at .

Also, due to the rotation of the large gear, the turntable 4 to which the large gear is attached, the brackets 12 and 13 attached to the turntable 4, and the pull-down rollers 8°, 9, 10, etc. that are supported on the brackets 12 and 13 are integrated. It rotates as follows.

The two levers 14 and 15 pivotally supported on the lower surface of the large gear 3 are connected to a plate-shaped cam 2 with rollers 25 and 26 attached to one end of the lever 14 and 15 by a tension spring 27 and fixed to the center of the main body of the circular knitting machine. Since the levers 14 and 15 are pressed against each other, the rotation of the large gear 3 causes the levers 14 and 15 to swing horizontally.

The contact position between the rollers 25 and 26 and the plate-shaped cam 2 is such that when the roller 25 contacts the peak of the cam surface, the roller 26 contacts the plate-shaped cam 2.
Since the levers 14 and 15 are configured to contact the valleys of the cam surface, the levers 14 and 15 always have the same swinging force direction. That is, when the lever 14 swings clockwise in FIG. also swings clockwise.

During this time, when the outer end of the lever 14 approaches the pull-down roller 8 due to the direction of the swinging force, the outer end of the lever 15 moves away from the pull-down roller 8.

When the outer end of the lever 14 moves closer to the pull-down roller 8 due to the swinging, the lever 14 is moved via the rod 19.
6 rotates clockwise in FIG. 2 and pushes the second lever 17 at point A, the first pawl 22 pivotally connected to the second lever 17 rotates the teeth of the ratchet wheel 18 by an appropriate number of glues. move beyond.

At this time, since the claws 21 are engaged with the teeth of the ratchet wheel 18, the ratchet wheel 18 does not rotate.

Next, when the outer end of the swing lever 14 moves away from the pull-down roller 8, the first lever 16 rotates counterclockwise via the rod 19, and the contact with the second lever 17 at point A is removed. .

The second lever 17 is rotated counterclockwise by the tension spring 20, but at this time, the first pawl 22 engages with the teeth of the ratchet wheel 18, so the ratchet wheel 1
8 and the pull-down roller 8 securing the ratchet wheel is rotated counterclockwise in the figure.

The pull-down roller 8 is connected to the pull-down rollers 9 and 10 by gears (not shown), and since the pull-down roller 9 rotates in the opposite direction to the pull-down roller 8, a suitable gap is provided between the pull-down rollers 8 and 9. The fed knitted fabric is pulled downward by the spring force of the tension spring 20.

When an appropriate tension is applied to the knitted fabric by pulling down the knitted fabric, and the tension is balanced with the tension of the tension spring 20, the pull-down roller 8
, 9 stop rotating.

When the second lever 17 is rotated counterclockwise, the second pawl 21
The rotation of the ratchet wheel 18 is not stopped only by climbing over the teeth of the ratchet wheel 18.

When the outer end of the swing lever 14 is moving closer to the pull-down roller 8, the outer end of the swing lever 15 is moved away from the pull-down roller 8, and the outer end of the swing lever 15 is moved away from the pull-down roller 8. The mechanism rotates the roller 8 to pull down the knitted fabric.

That is, the knitted fabric is pulled down by alternately applying rotation to the pull-down roller 8 inside the bracket 12 and inside the bracket 13.

The spring force of the tension spring 20 that rotates the pull-down roller is adjusted by turning the handle 23 and changing the position of the spring hook 24.

As detailed above, according to the present invention, the cam that rotates the pull-down roller of the knitted fabric is a small-diameter plate-shaped cam fixed at the center of the circular knitting machine, so it is not necessary to manufacture various cams depending on the size of the knitted fabric. do not have.

Also, the positions of the rollers 25 and 26 in contact with the plate-shaped cam are changed, for example, when the roller 25 is in contact with the peak of the cam, the position of the rollers 25 and 26 is changed.
6 is in contact with the valley of the cam, so the two rollers 2
The distances 5 and 26 are constant S, and the roller can always be pressed against the plate-shaped cam with the same contact pressure S, so that uneven wear on the cam is not caused.

Furthermore, since the spring force of the tension spring 20 that rotates the pull-down roller can be changed as desired, it is possible to adjust it appropriately according to the knitted fabric.

Furthermore, with conventional cylindrical cams, the gap between the turntable and the turntable was small, making it difficult to clean flies and other debris that had accumulated on the turntable inside the cylinder. It has many features such as the ability to easily clean the table top.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the knitted fabric pull-down device of a circular knitting machine, Fig. 2 is an enlarged view of Fig. 1, and Fig. 3 is a cross section showing the rotation speed conversion part. FIG. 4 is a diagram showing a sliding device of a motor mounting sliding base. 2... Plate cam, 3... Large gear, 4...
...Turntable, 8, 9, 10...
Pull-down roller, 14.15... Swing lever, 1
7... Second lever, 18... Ratchet wheel, 20... Tension spring, 22...
...first nail.

Claims (1)

[Scope of utility model registration request] In order to rotate a turntable that supports a plurality of pull-down rollers that are installed at the bottom of the circular knitting machine and are rotatably coupled in the horizontal direction with appropriate gaps, a large gear connected to a shaft drive source is installed on the underside of the turntable. a ratchet wheel is fixed to the end of one of the pull-down rollers, and a lever having a pawl that engages with the teeth of the ratchet wheel is pivotally supported at the same end of the roller as the ratchet wheel; The lever is equipped with a tension spring that acts in the direction of rotation of the ratchet wheel when the claw is engaged, and a swinging lever that contacts a cam fixed to the frame of the circular knitting machine and swings as the turntable rotates. In the knitted fabric pull-down device, the lever with a claw is swung by a lever, the claw rotates the ratchet wheel, rotates the plurality of pull-down rollers, and pulls down the knitted fabric fed between the pull-down rollers, The cam fixed to the circular knitting machine frame is a star-shaped polygonal plate-shaped cam that is coaxial and horizontal with the large gear and has a smaller diameter than the large gear, and the swing lever is deviated from the center of the turntable. The lower surface of the large gear or turntable is pivotally supported at a position to contact the plate-shaped cam, and when the turntable is rotated, the pull-down roller is rotated by the plate-shaped cam via the swing lever. Features: A knitted fabric pull-down device in a circular knitting machine.