TW518378B - Continuous pulling device for knitting machine - Google Patents

Abstract

Pulling device for flat knitting machine (1, 2) comprising two elastic belts (5, 6) driven continuously in opposite directions by two horizontal shafts (7, 8) and passing over two countershafts (10, 11) mounted on two frames, (12, 13) supported by the drive shafts in such a way that the belts are applied against one another. The device comprises means of modifying the shape of the envelope of the pulling belts in such a way as to differentiate locally the pulling force applied, such as variable-speed motors (14, 15) driving the shafts and localized means of pressure (21, 22) on the belts.

Description

518378

The knitting machine shaft of the flat knitting machine is in the opposite direction to the frame of the elastic sleeve of the auxiliary sleeve. 5. Description of the invention (1) Background of the invention The present invention relates to a continuous cloth pulling device with one or more needle beds. , Including two continuous drives driven by two horizontal drives and bypassing at least two attached belts provided in the knit formation area, wherein the auxiliary shafts are provided by the drive shaft so that the elastic belt generates friction on the frame on the drive shaft Run in reverse. Prior art: Such a device is described in Swiss Patent CH 633 334 (i.e. U.S. Patent 4,359,881). This device developed by the applicant has been successfully used by future generations for nearly 20 years. The knitted fabric is stretched by sliding friction continuously or in the process of knitting, and is gently stretched between the elastic belts very close to the area where the knitting has been formed. The elastic belt system extends over the entire length of the knitting machine 'and the drawing device applies an average traction force to the total length of the fabric and its two sides. Today, fabric structures that can be produced by modern knitting machines are becoming more complex, such as the production of trihedral (three-dimensional) objects. These machines are already capable of producing shaped fabrics and complete knitted products, such as pullover sweaters, which are knitted and finished on the machine. During the knitting process, the weaving edges of the front needle bed and the rear needle bed are not woven at the same time, but often ^ wait for each other to pass the cam head of the knitting machine for controlling the knitting needles many times before they can be used on the entire opposite needle bed or Weaving is performed only in a part of the needle bed. Na Na Therefore, if we can stretch the weaving fabrics that are not manufactured at the same time with different force 1 if necessary, it can automatically change the traction of the width of part of the weaving surface.

Page 5 518378 V. Description of the invention (2) The eyelet structure of the surface can have different styles and densities. For this purpose, the force applied to the woven fabric can be locally changed as needed. This is especially important for the production of three-dimensional Helpful. SUMMARY OF THE INVENTION The object of the present invention is to meet these requirements. To achieve this, the fabric pulling device according to the present invention is characterized in that it includes a device that can modify (change) the outer shape of the elastic belt, so that the pulling force applied to one or more sides of the fabric is different. There are many types of devices that modify the outer shape of the elastic belt, which can be used alone or in combination. According to an embodiment, the correction device for the shape of the outer periphery of the elastic belt includes pressure devices provided on the frame, and the pressure devices apply a pressure to the elastic belt to increase its tension. Increasing the tension of the elastic belt acts to increase the pressure of the frame drive shaft, which results in friction. Therefore, both forces are applied to the frame, and the elastic belt exerts a clamping force on the fabric. According to another embodiment, the correction device for the shape of the outer periphery of the elastic belt adds a contact surface between at least one elastic belt and the fabric. According to an embodiment, the correction device for the outer shape of the elastic belt is in each frame, preferably in a certain section, including at least one frame section provided between the frame and the elastic belt, and the shaft system is parallel to the axis of the driving shaft. The length of the component is equivalent to the length of the needle bed, and the length is shorter than the length of the frame section and can be moved axially. The drive is used to drive these components axially. These components separate the elastic belt from the frame and correct the change

518378

The shape of the outer periphery of the belt. It is better if these elongated members are provided between the two sliding nuts, along the axis of movement, and are freely slidably arranged on the circulating screw. The arrangement of the v-shaped member and the roller has the effect of opening the elastic belt from the frame, thereby increasing the tension of the elastic belt. "To increase tension locally, the frame is divided into a number of independent frames. That is, each frame is independently driven by a drive shaft.", Each frame is preferably provided with at least one rolling device on the inside and / or outside of the frame. It is provided with two variable-speed motors, each of which is driven separately by a shaft. Description of the preferred embodiment: This motor has two steering,

Two two-needle professional equipments are made of stretched leather 11 and driven straight. The first figure is fixed on the machine tool. The bottom of the needle bed is CH 633. The two systems are endless and the two belts 5 and 6 are combined. The pair of auxiliary shafts ϋ 7 and the & upper block are shown, and the flat knitting machine (flat knitting machine) shown is generally known to include, a frame 3, and a pair of needle beds 1 and 2. It can be seen that there are two slots 4 for setting needles and keys (not shown). There is a continuous bifurcating device whose main components are the same as those of the aforementioned Go No. 334 (ie, U.S. Patent No. 4, 35, 881). The second, B, and Weicheng mainly include two elastic belts 5 and 6 made of smooth rubber or similar, respectively driven by two axes 7 and 8 which are symmetrical with each other in parallel with the plane 9 of the knitting machine. The secondary shafts supported by the two frames 12 and 13 respectively are composed of simple cylindrical metal bars with a small diameter and are supported by the frames 12, 13 which support Η. The frames 12 and 13 are mainly composed of angles, which extend over the entire shaft length of the shafts 7 and 8, and each have −

Page 7

Ϊ is used as ΪΪ2 grooves' to facilitate sliding on the shafts 7 and 8, and the opposite side grooves π, coefficients of 10 and 11 are used for bearings. The frames 12 and 13 should be made of this technique. The elastic belts 5 and 6 are in a slight tensile force. Opposite forces are applied to the frames 12 and 13 to oppose one of the two shafts 7 and 8 as shown by the arrow and the frictional force of 8. The frames 12 and 13 have the tendency to be driven by the driven shaft 7 and this kind of driving has the effect as described in this patent, ideally relative to each other along the plane of symmetry 9 of the knitting machine. The difference is mentioned later when we return to the first figure. The second figure shows an example of a device that changes (corrects) the shape of the outer layer (periphery) of the tape. These devices include two variable speed motors 4 and 15 and 8, respectively, which drive the drive shafts 7 and 8. The two motors are independently controlled, and their rotations * m j are turned in the forward and reverse directions as shown in the direction of the double-signed poem. These two motors 14 and 15 can change the horse and the degree, so that the elastic belts will resist each other more or less, that is, the contact area between the belt and the fabric will be reduced. This change will also lead to the meaning. Changes in the outer shape of elasticity and changes in tension. These motors also cause changes in the tension of the weaving edge on each bed. In this way, the knitted edge of the front or back piece can be knitted faster than the knitted edge of the other piece. One of the two <~ i ^ k sex belts can be completely stopped, and only pulled by the opposite elastic skin. A motor can be rotated in the reverse direction to make the equivalent fabric edge of the woven fabric easy to remove. &amp; Another improvement can also be seen in the second figure, which will be described in detail with reference to the third to fifth figures showing another embodiment, so that the elastic belt can be changed by changing

Page 8 518378 V. Description of the invention (5) The tension of 5 and 6 changes the tension frame 12 and 13 (third and fourth figures) have V-shaped longitudinal grooves on each side, such as the groove 16, which is connected to the drive shaft The axes of 7 and 8 extend parallel. Each concave cycle screw, such as screws 17 and 18. The screw is provided with nuts 19 and 20, which are prevented from rotating by the shape of the groove 16. Between the nut _2〇, there are two tubular rollers 'every 16, that is, the first roller 21 can rotate freely on the screws 17 and 18 with the tube 22', but the axial direction is limited by the sliding nut = Moved from. The circulation screw 17 can be driven individually by an electric motor, such as the disc 25, while the circulation screw 18 is automatically controlled by the electric motor with the "drive of these motors" to enable 21 and 22 in the groove 16 provided along the frame 12. A motor 23 and 24 directly drive the circulation screw ^ and ^ = Motors 2, 5, and 6 drive the equivalent circulation screw through the transmission belts 27 and 28. ♦ One of the rollers provided under the elastic belt 5 can be borrowed. By lengthening the path of the elastic belt 5, that is, locally increasing the tension of the elastic belt, the function of changing or modifying the outer shape of the elastic belt is increased. Increasing the tension on the elastic belt can lead to an increase in the force it exerts on the reverse bending arc. That is to increase the tensile force on the fabric. This can be easily explained by increasing the pressure on the driving shaft on the frame and the friction between the moving shaft and the frame. It can also be placed on the inner faces of the frames 12 and 13 as outside, that is, face to face with each other. From the fourth figure, it can be seen that the roller provided on the inner face of the frame can increase the length of the woven fabric held between the elastic belts, and therefore partly Increase weaving The tension of the cloth. The fifth Sl · indicates the area where the elastic belts 5 and 6 have no rollers. Under this condition, the tension is the smallest.

Page 9 518378 V. Description of the invention (6) This embodiment shows that each frame includes four pairs of rollers, of course, it can be limited to one pair of rollers per frame, or even only one roller. The rollers can be arranged on only one frame. The rollers do not necessarily need to be rotatable on the screws 17 and 18. Such rollers can therefore be replaced by pipes with non-circular cross sections, especially polygonal cross sections. These rollers can also be replaced by any elongated member that can be turned or not turned. Another modification of the elastic belt 5 is a groove 30 provided on the surface of the elastic belt as shown in the third figure. In this example, the groove 30 is a parallel groove extending parallel to the axis of the device, that is, parallel to the axis of the driving shaft 7. These grooves 30 can increase the adhesion of the elastic belt 5 to the woven fabric and the adhesion between the leading edge and the trailing edge of the woven fabric, but they can slide the woven fabric to prevent excessive friction from causing surface damage. The two elastic belts 5 and 6 are in principle provided with grooves in the same manner. As a variant, the groove may be inclined with respect to the axis of the device system, that is to say it is actually spiral. Transverse grooves can also be provided after the two opposite spiral grooves. It can be seen in the fourth figure that the use of two stacked rollers can locally increase the tension on the fabric. The sixth figure shows how a single roller can locally increase the tension. This can be achieved by segmenting the frame, such as frame 12 shown in Figure 6. The frame is here divided into several independent frames 12a to 12g. By one or two rollers, such as rollers 21 and 22, the tension of the elastic belt 5 located on one or more of the frame sections 12a to 12g can be locally increased. Make

Page 10 518378 V. Description of the invention (7) The extra tension applied to the frame section will strengthen the elastic belt against the elastic belt in the opposite direction, and thus increase the pulling force. One or two frames can be segmented. The layshaft 10 is of course divided into a plurality of layshafts 10a to 10g. A local increase in pressure, that is, an increase in the tension of the elastic belt, can still be achieved in other ways than the rollers already mentioned.

Page 11 518378 Brief Description of the Drawings The drawings show by way of example an embodiment of the present invention and variations thereof. The first figure is a cross-sectional view of the upper portion of a two-needle bed cross-knitting machine with a drawing device. The second figure is a perspective view of a drawing device excluding a knitting machine needle bed. The third figure is a perspective view showing a system of a cloth pulling device with a partially elastic belt. The fourth figure is a cross-sectional view of the second system of the cloth spreading device which is symmetrically displayed with the first system, taken along the IV-IV section of the third figure. The fifth figure is a cross-sectional view of the second system of the drawing device taken along the V-V part of the third figure. The sixth figure is an improved state of the cloth drawing device. Explanation of symbols: 1,2 needle bed 3 frame 4 slot 5, 6 elastic belt 7, 8 drive shaft (shaft) 9 plane of symmetry 10, 11 pair of Korea 12, 13 frame 14, 15 variable speed motor 16 groove 17, 18 Screw 19, 20 Nut 21, 22 Roller 23, 24, 25, 26 Horse 30 Groove 27, 28 Drive belt

Page 12

Claims (1)

518378 6. Scope of patent application 1. A continuous drawing device of a knitting machine, suitable for a flat knitting machine with one or more needle beds, this device includes: two elastic belts, which are continuously driven by two horizontal drive shafts in opposite directions Drive and warp at least two secondary shafts located near the knitting belt zone, wherein the secondary shafts are arranged on at least two frames supported by the drive shafts respectively, so that the elastic belt can apply friction to the frame on the drive shafts Forces act against each other under the action of force; and the device includes a correction device that changes the shape of the outer periphery of the elastic belt, so as to make a difference in the tensile force locally applied to one or more sides of the woven fabric. 2. The cloth pulling device according to item 1 of the scope of patent application, wherein the correction device for changing the outer shape of the elastic belt for cloth pulling includes: a pressure device provided on the frame, and the pressure device applies a pressure on the elastic belt so that The tension of the elastic belt is locally increased, so that the pressure of the woven fabric is also increased, that is, the pulling force is increased. 3. The cloth pulling device according to item 1 of the patent application scope, wherein the correction device for changing the outer shape of the elastic belt for cloth pulling is to increase the contact surface between at least one elastic belt and the woven fabric. 4. According to the drawing device of scope 2 or 3 of the patent application, at least one of the frames is divided into several independent frames. 5. The cloth pulling device according to item 2 or 3 of the patent application scope, wherein the correction device for changing the outer shape of the elastic belt includes: at least one elongated member whose axis is parallel to the axis of the driving shaft and is provided on the frame Between the frame and the elastic belt, its length is equal to a segment of the needle bed, and can be driven-driven axially on the frame; and the device for axially driving the long member; these components make the elastic belt from the frame Separation to correct (change) the elastic belt Page 13 518378 6. Scope of patent application Peripheral shape. 6. The cloth-pulling device according to item 5 of the scope of patent application, wherein each of the elongated members is arranged on the inner side and / or the outer side of the frame. 7. The cloth pulling device according to item 5 of the scope of patent application, in which each long member is set on a circulation screw and cannot rotate between the two nuts. The circulation screw is independently driven by a motor, so the long member can automatically rotate. Move to the direction of the knitting zone. 8. The cloth spreading device according to item 7 of the scope of patent application, wherein the elongated member includes a rotatable or non-rotatable roller provided on a circulating screw. 9. The cloth pulling device according to any one of claims 1 to 3, wherein the elastic belt has grooves on the outside. 10. The cloth spreading device according to item 9 of the patent application, wherein the groove is parallel to the axis of the driving shaft. 11. The cloth spreading device according to item 9 of the patent application, wherein the grooves are spiral. 1 2. The cloth spreading device according to item 9 of the scope of patent application, wherein the elastic belt has two spiral groove systems crossing each other. 13. The cloth spreading device according to any one of claims 1 to 3, wherein the device includes two variable speed motors that respectively drive the drive shaft. 1 4. The drawing device according to item 13 of the scope of patent application, wherein the motor has two directions of rotation. Page 14