JPH02221447A - Self control-automatically control apparatus for pressure and yarn consamption in linear knitting machine - Google Patents

Abstract

PURPOSE: To make a knitting yarn feedable to a knitting machine under a constant tension by providing a structure for arranging a pair of pressure plates near a side tensor and regulating the mutual pressures of the pair of the pressure plates according to the degree of tilting of the side tensor. CONSTITUTION: This apparatus is obtained by installing a pair of pressure plates 5 near a side tensor 6 provided at an outer position of needle beds of a rectilinear knitting machine and serving to feed a knitting yarn to a carrier and providing a structure for enabling the pair of the pressure plates 5 to regulate the mutual pressures between the plates 5 according to the degree of tilting of the side tensor 6. The knitting yarn taken out of a package is passed through a space between the pair of the pressure plates 5, then passed through a guide hole 27 at the tip of the side tensor 6 and subsequently fed to a carriage sliding on the needle beds.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION The present invention provides a system in which the adjustment of the pressure on the yarn and the consumption of the yarn are automatically adapted to the specific requirements of each knitting course, with their complete self-control. The present invention relates to a device for self-control and automatic adjustment of pressure and yarn consumption in a linear knitting machine.

BACKGROUND OF THE INVENTION The devices currently in use for guiding, controlling and regulating silk threads in straight knitting machines have remained virtually unchanged in recent times.

The knitting yarn is drawn from a supply cone placed on the support plate, passes through the upper arm or upper tensor/knot catcher/pressing plate placed on the top of the knitting machine, and then passes through the side tensor placed on the left or right side. and from there to a carrier that places the knitting yarn in the knitting position.

For perfect knitting, it is necessary to adjust not only the upper tensioner but also the pressure plate and the side tensioners, which requires an operator with considerable knowledge and experience. This adjustment is even more difficult when using yarns with low elasticity, such as recycled yarns, worsted yarns, or yarns made from staple fibers, as this creates very large waste.

On the other hand, once the tension of the knitting machine is set manually, it remains constant, but in reality it is desirable that the tension changes depending on the consumption of knitting yarn during each knitting process, because: There is an inversely proportional relationship between thread consumption and pressure; if the thread consumption is large, the pressure of the pressure plate on the thread will be small, and if the thread consumption is small, the pressure of the pressure plate on the thread will be small. This is because it becomes large.

[Description of the invention] According to the device according to the invention, self-control and automatic adjustment in a straight knitting machine is ensured, and the above-mentioned problems can be satisfactorily solved. The pressure of the pressing grate is automatically adjusted according to the yarn consumption and adapted to the yarn requirements for each course of knitting.

According to another feature of the invention, the pressure plates are suitably mounted on a support having a threaded diameter reduction and are pressed against each other by conical coil springs, the pressing force being applied to the threaded diameter reduction. In addition, a special washer is arranged between the conical coil spring and the corresponding pressure plate, which, as described below, A central transverse section is provided which engages an axle pin mounted within the bore and actuated by side tensors. With this configuration, the conical coil spring limits the pressure applied to the first pressing plate to be more or less depending on the amount of pushing force applied by the shaft pin to the special washer, and the thread passing between the two pressing plates is limited. pressure regulation is achieved.

For actuation of the control axle pin of each pressure plate pair, the control axle pin protruded from its support and was placed operatively opposite the head of the corresponding side tensor. The head is tiltably attached to the rotating shaft and biased in a tension-adjustable manner by a spring in a direction away from the control shaft pin. Therefore, when the knitting machine is stopped and the yarn consumption is zero, the pressure between the pair of pressure plates is maximum, but
When the tension of the yarn increases and the side tensor is deformed, the head of the side tensor gradually tilts accordingly, and pushes the shaft pin for controlling the pair of pressing plates. Correspondingly, the pressure between the pressure plates also gradually decreases to the limit of maximum consumption of the yarn.

At the limit of maximum yarn consumption, the pressure between the pressure plates is zero.

According to another feature of the invention, the side tensioners are conically shaped, i.e. the cross section of the side tensioners gradually decreases towards its free end with a threading hole for feeding the thread into the carrier of the carriage. The visibility of one is made to gradually increase towards its free end. Therefore, the actual movement of the threading hole through which the thread passes is considerably greater than the tilting movement of the head of the side tensor. Depending on the type of adjustment actually required, the movement of the axle pin corresponding to the pressure plate pair can therefore be minimized.

Further, a microswitch operating arm is provided on the head of the side tensor, and before the yarn is cut, the side tensor is tilted to the ultimate state for operating the microswitch by the action of a spring to stop All.

[Example] Hereinafter, for a better understanding of the present invention, the accompanying drawings showing an example of the present invention will be described.

The drawing shows a linear knitting machine with a self-controlling and automatic adjustment device according to the invention, in which the yarn 3 is first fed into the upper tensioner 4 or arm and then passed through the pressure plate 5, the side tensioner 6 and then into the Llm. There is a platform or support plate 1 for each cone 2 feeding it to a carrier 7 arranged on a moving carriage.

One of the features of the invention, which is based on this basic prior known construction, is that instead of arranging the pressure plate 5 near the upper tensor 4 at the upper end, it is placed at the side end of the knitting machine, i.e. as shown in FIG. As shown, it is located near the side tensor 6.

Furthermore, the structure of the pressure plate 5 has also been modified, as is particularly evident in FIG. The pressure plate 5 has a support 8 with a threaded diameter reduction 9 and a diametric cutout 10.
Supported by A conical coil spring 11 that presses the pressure plates 5 against each other is attached to the threaded reduced diameter portion 9. The zero-cone coil spring 11 has its large diameter end in contact with one of the pressure plates 5, and its other end in contact with one of the pressure plates 5. Threaded diameter reduction part 9
It rests on a washer 12 whose position is adjusted by an adjusting nut 13 screwed into the holder.

Each pressure plate pair assembly has a special washer 14 disposed between the conical coil spring 11 and the pressure plate pair 5, and
The special washer 14 is provided with a central transverse section 15 that fits into the diametrical cutout 10 of the threaded diameter reduction part 9, and the support 8 is provided with an axial hole 1.
6, an axial pin 17 is inserted into the axial hole, and the inner end 18 of the axial pin 17 is engaged with the central transverse section 15 of the special washer 14. The movement of the axle pin 17 therefore controls the position of the special washer 14, which controls the influence of the conical coil spring 11 on the pair of pressure plates 5 or the like, and on the thread passing between the pair of pressure plates. Pressure is controlled.

The position of the shaft pin 17 is controlled by the corresponding side tensor 6. Therefore, the pressure plate and the side tensor are arranged close to each other at the side end of the knitting machine. Each side tensor 6 is provided with a head 19 which is tiltable about an axis common to all heads of each side tensor 6, as can be seen in particular from FIG. The tilting of each head 19 is controlled by a spring whose lower end is attached to the head 19 by a hook 22 or other suitable means, and whose other end is attached to a support frame 23 that supports the entire tensor mechanism (see Figures 5 and 6). 21
done against.

A horizontal shaft 24 is attached to the upper end of the support frame 23, and a roller 25 for guiding the thread 3 from the upper tensor 4 to the pressure plate 5 is attached to the horizontal shaft 24. Below the horizontal shaft 24, a support for the pressure plate 5 is attached. A horizontal flat parr 26 supporting the tensors 8 is attached, and a shaft 20 for tiltably supporting the head of each side tensor 6 is attached at the lower rear of the horizontal flat parr 26.

As can be seen in particular from FIG. 4, the side tensioners 6 are conically shaped, i.e., in such a way that their flexibility gradually increases towards the free end, which has a thread guide hole for guiding the thread into the carrier 7.
Its cross section decreases towards its free end. The side tensor may be formed from a round bar whose diameter gradually decreases toward its free end, as shown in FIG.

Moreover, a pair of horizontal bars 29 are arranged behind the shaft 20 and attached to the supporting frame 23 , specifically, to projecting arms 28 projecting from the supporting frame 23 . A large number of microswitches 30 are attached to the pair of horizontal bars 29, and each microswitch 3
0 is operatively arranged with respect to each head 19 of the side tensor 6, specifically, the tongue piece 31 of each microswitch 30 is operatively arranged with respect to the arm 32 fixed to the head 19 of the side tensor 6, respectively. has been done. The side tensors 6, one of which is illustrated in FIG.
2 operates the tongue piece 31 of the corresponding micro switch 30 to stop the knitting machine.

3 and 4, especially FIG. 3, it can be seen that the consumption of the yarn 3 increases, the tension on the side tensor 6 increases, the side tensor 6 tilts, and the various movements shown in dotted lines in FIG. Once in position, the axle pin 17 advances within the support 8 to advance the special washer 14 and, depending on the degree, press plate 5
Gradually reduce the pressure between. In the state of maximum consumption of yarn,
The pressure between the pressure plates is zero.

According to the purpose of the invention, the controlled adjustment of the pressure on the yarn is
This is done automatically according to the requirements of the knitting machine, but the adjustment screw 13
It can also be adjusted manually.

It is assumed that one costume is knitted using all the knitting needles in both knitting heads. It takes time to knit this course, and the pressure of the press plate 5 against dazzling light is determined by the thread withdrawal speed and thread consumption speed.

If the @ course is knitted using only the knitting needles of one knitting head, the usage time is the same, but the yarn draw-out consumption rate is reduced by almost half, and the pressure of the press plater on yarn 3 is approximately 2 increase twice.

From the above description, it is believed that one skilled in the art can fully understand the scope and advantages of the present invention.

The material, shape, size, and arrangement of each element can be variously changed without changing the gist of the present invention.

The terms herein are always to be interpreted in a broad and non-limiting sense.

[Brief explanation of the drawing]

FIG. 1 is a schematic partial front view of a knitting machine with automatic controlled regulation of pressure plate pressure and yarn consumption, which is the subject of the invention. FIG. 2 is an enlarged view showing one pressing plate pair assembly and the corresponding head of one side tensor in an inactive state. FIG. 3 is a view similar to FIG. 2, with the head of the side tensor in a different position with respect to the pair of pressure plates, with increased thread tension; FIG. 4 is an explanatory diagram of the operation of the self-control and automatic adjustment device shown in FIGS. 2 and 3, which is provided at the aia side end. 5 and 6 are overall perspective views of the end portion of the knitting machine shown in FIG. 4, viewed from different viewpoints, respectively. FIG. 7 is an exploded perspective view of the pressing plate pair assembly. 4: Upper tensor 5: Pressing plate 6: Side tensor 7: Carrier 8: Support body 9:
Threaded reduced diameter part 10: Diameter kerf 11: Conical coil spring 14: Special washer 17: Axis pin 19: Head 30: Micro switch 32:
Arm FIG, -4 FIG72 FIG=3 IGr5

Claims (1)

[Claims] 1. An arm or tensor with a corresponding knot catcher, a pair of pressing plates, and a side that is arranged at the side end of the knitting machine and sends the yarn from there to a carrier provided on the carriage of the knitting machine. Self-control of pressure and yarn consumption in a straight knitting machine with a tensioner - in an automatic adjustment device, a pair of pressure plates is arranged near the side tensioner at the side end of the knitting machine, and the pair of pressure plates has a corresponding Self-control of pressure and yarn consumption in a straight knitting machine - automatic, characterized in that it is provided with means for adjusting said pressure by automatically actuating a side tensor and actuating a pressure plate in response to its actuation - automatic Regulator. 2. Each pressure plate pair is each acted upon by a corresponding pressure spring via a special washer with a central transverse piece that fits into a diametrical groove in each corresponding support, and each support has an axial hole. formed into which an axle pin is fitted, the inner end of said axle pin abuts the central transverse piece of the special washer, and, depending on the extent to which the axle pin is pressed, pressure is transmitted from the pressure spring to the pressure plate. The pressure in a straight knitting machine according to claim 1, characterized in that the degree of pressure is limited to a limit state where the pressure is completely eliminated, and the axis pin is actuated by a corresponding side tensioner. and self-control of yarn consumption - automatic adjustment device. 3. Each of said side tensors is provided with a head that tilts on an axis common to all said side tensors, and each head is directly connected to the axis pin of the corresponding pair of pressing plates. and is tilted by the tension of the thread passing through the threading hole at the free end of the side tensor against the tension of a spring tensioned between the head and the frame structure of the device. A self-control and automatic adjustment device for pressure and yarn consumption in a linear knitting machine according to claim 1 or 2. 4. Each side tensor is formed into a conical shape whose thickness gradually decreases toward its free end, and therefore its flexibility decreases toward its free end; or , consisting of a plurality of cylindrical pieces suitably connected to each other and having a diameter that gradually decreases towards the free end of the side tensor. Self-control of pressure and yarn consumption in a linear knitting machine according to any of the preceding paragraphs - automatic adjustment device. 5. On the frame structure supporting each pair of pressing plates and each side tensor, another supporting frame is provided to support each microswitch that automatically stops the knitting machine before the yarn is cut, and Claim 1, characterized in that the microswitch is provided with an actuating arm that is actuated by the head of the side tensor within a critical tilting state of the head of the side tensor that occurs during thread breakage.
Self-control-automatic adjustment device for pressure and yarn consumption in a linear knitting machine according to any one of paragraphs 1 to 4.