JP3584056B2 - Knitting yarn holding device of flat knitting machine - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to simplification and miniaturization of the structure of a knitting yarn holding device used in a flat knitting machine and control thereof.
[0002]
[Prior art]
The flat knitting machine, the knitting yarn is drawn from the package arranged on the cone base, after passing through the top spring device composed of the knitting machine the tension placed on the upper arm knot calibration char tension disc, the machine left or right The yarn is fed to a yarn feeding port for feeding yarn to a knitting needle on a needle bed via a side tension device arranged on the side.
The knitting yarn is supplied to the knitting needle and knitted with an appropriate tension applied by the above-described tension device.
[0003]
The knitting yarn sent from the package is sent to the yarn feeder via one of the left and right side tension devices. Since the yarn feeder is entrained by a carriage that reciprocates slightly to the outside of the knitting width, the condition of the knitting yarn tension applied at the beginning of knitting after folding varies depending on the knitting direction. For example, in the case of the knitting yarn sent from the side tension device on the left side of the knitting machine, the tension applied to the folded knitting yarn is smaller in the left knitting than in the right knitting. This is because when the knitting of the previous course in the right direction is completed, the yarn feeder is entrained outside the knitting width, that is, in a direction away from the side tension device, so that the knitting yarn loosens during the start of knitting in the left direction knitting. It is because.
[0004]
As a result, there is a problem that the size of the stitches at the end of the knitted fabric lacks uniformity. In order to solve the above problem, there has been provided a knitting yarn holding device provided with an electromagnet capable of pressing each individual knitting yarn used for knitting as a knitting yarn slack stop upstream or downstream of the side tension device. . In the above-described apparatus, the number of electromagnets as many as the number of knitting yarns is prepared, so that assembly of the apparatus including the electromagnets is troublesome, and there is a problem that the apparatus itself becomes large.
[0005]
[Problems to be solved by the invention]
The device of the present invention has been developed in view of the above problems, and simplifies and reduces the size of the knitting yarn holding device, and controls the pressing and releasing of the knitting yarn based on knitting information. An object of the present invention is to provide a knitting yarn holding device that prevents generation of slack in a yarn.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, according to the invention of claim 1, a plurality of knitting yarn guiding portions for guiding knitting yarns are arranged in a housing made of a non-magnetic material and supported by a bracket support surface in the housing. A bracket made of a magnetic material having a U-shaped cross section extending orthogonally to the knitting yarn passing through the plurality of knitting yarn guides; a bobbin having a coil wound around the bracket inside the bracket; A movable iron core that is mounted and reciprocated through an opening formed on one side wall of the U-shaped portion of the bracket, and an opening formed on the other side wall of the U-shape facing the opening; A fixed iron core fitted to the portion, and a biasing means for biasing the movable iron core toward a side away from the fixed iron core, respectively, to constitute a plurality of electromagnets, One end of the iron core is used as an adsorption part with the fixed iron core. Is a knitting yarn pressing portion, the housing is partly opposed to the knitting yarn pressing portion and serves as a stopper of the movable core, and the urging force of the urging means is applied to the pressing force of the knitting yarn by the knitting yarn pressing portion. The knitting yarn passing through the space area between the knitting yarn pressing part and the stopper is movable according to the knitting machine knitting information such as the position information of the yarn feeder and knitting data. A knitting yarn holding device of a flat knitting machine was constituted by control means for controlling the reciprocating movement of the iron core and pressing and releasing the knitting yarn.
[0008]
Further, in the invention according to claim 2 , the sliding portion between the movable iron core and the bobbin is provided with an anti-rotation shape so that the movable iron core does not rotate in the bobbin, and the knitting yarn pressing portion has the knitting yarn pressing portion. The area ratio was set so as to be held on the center side of.
[0009]
[0010]
Further, in the invention according to claim 3 , the biasing means is constituted by a compression spring housed in a concave portion formed at the tip of the suction portion of the movable iron core.
[0011]
[0013]
In the invention according to claim 4 , the control means compares the knitting end point of the previous course of the yarn feeder as knitting information with the knitting start point of the next course, and determines the next knitting start point as the knitting end point. When the yarn feeder is located outside, the control command is given so that the knitting yarn is released when the yarn feeder reaches the knitting start point, and when the next knitting start point is inside the knitting end point, the yarn feeder A control command is given so that the knitting yarn is released when the knitting end point is reached.
[0014]
[0015]
[Action]
A plurality of coils, bobbins, movable iron cores, fixed iron cores and biasing means are provided in a bracket made of a magnetic material, and a knitting yarn pressing portion formed at the tip of the movable iron core is disposed opposite to the pressing portion. With the stopper, the movable iron core is controlled to reciprocate the knitting yarn passing therethrough in accordance with the knitting conditions of the knitting machine to press or release the knitting yarn.
Further, a plurality of knitting yarn guides for guiding the knitting yarns are provided side by side in a housing made of a non-magnetic material, and are supported by a bracket support surface in the housing, and are orthogonal to the knitting yarns passing through the plurality of knitting yarn guides. And a plurality of coils, bobbins, movable iron cores, fixed iron cores, and biasing means are disposed in the brackets, and a plurality of coils, bobbins, movable iron cores, fixed iron cores, and urging means are provided at the ends of the movable iron cores. With the formed knitting yarn pressing portion and the stopper arranged opposite to the pressing portion, the movable iron core is controlled to reciprocate the knitting yarn passing therethrough according to the knitting conditions of the knitting machine, and the knitting yarn is pressed or released. The control means obtains the position information of each yarn feeder and the knitting information of each yarn feeder from the knitting data, and controls the output of the electromagnet so that the knitting yarn is not loosened.
[0016]
【Example】
An embodiment of the knitting yarn holding device 1 of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a knitting yarn holding device 1 of the present invention is provided with a knitting yarn 3 pulled out from a package 2 set on a cone stand at the top of a flat knitting machine, provided between a ceiling spring device (not shown) and a needle bed. Have been. The knitting yarn 3 pulled out from the package 2 passes through the knitting yarn holding device 1, and is wound around the roller surface of the yarn feed roller 4 disposed downstream thereof for one round, and is provided at the tip of the side tension arm 5. The yarn is sent to a yarn feeder that reciprocates on a needle bed via a yarn guide 6. The yarn feed roller 4 has a cylindrical shape extending in the depth of the paper, and can act on a plurality of knitting yarns passing through the side tension device 7. The yarn feed roller 4 is driven to rotate by driving means such as a motor, and positively sends out the knitting yarn 3. The side tension arm 5 is adjustably mounted on an arm mounting base 8 mounted on a knitting machine stand so that an appropriate tension can be applied to the knitting yarn 3.
[0017]
FIG. 2 is an enlarged sectional view of the knitting yarn holding device 1 of FIG. FIG. 3 is a plan view of FIG. FIG. 4 is a sectional view taken along line AA of FIG. FIG. 5 is a diagram of FIG. 2 viewed from the right side of the paper, and the right half is shown in a perspective view.
[0018]
The knitting yarn holding device 1 has four knitting yarn guides 10 arranged side by side on the upper surface of a housing 9 and supports a bracket 11 made of a magnetic material in a U-shaped cross section perpendicular to the passage of the knitting yarn 3 in the housing 9. A bobbin 14 fixed on the surface 12 and wound around the coil 13 around the outer periphery of each knitting yarn guide 10 in the bracket 11 is formed in the bobbin 14 at an opening 33 formed in the side wall 15 of the bracket 11. The engaging pieces 16 are fitted and supported respectively. Further, one end of a fixed iron core 19 is fitted and fixed to an opening 18 formed in the other side wall 17 of the bracket 11. The movable iron core 20 penetrates through the bobbin 14 and the opening 33 and is reciprocally supported. The movable iron core 20 has a suction portion 21 having a tapered shape on the side facing the fixed iron core 19, and a knitting yarn pressing portion 22 larger than the diameter of the iron core main body at the other end of the movable iron core 20. Further, as shown in FIG. 4, the movable iron core body has an engagement surface 23 in which both ends of a cylindrical shape are cut off, and the sliding surface of the movable iron core 20 of the bobbin 14 has the same shape as described above. The rotation of the movable iron core 20 is prevented by the joint surface 23 so that the knitting yarn pressing portion 22 can act on the knitting yarn 3 at a predetermined angle. The shape of the knitting yarn pressing portion 22 of the movable iron core 20 is such that the area of the knitting yarn passing portion is smaller than that of the periphery thereof, and the upper and lower arcs are cut off to form a constricted center of the circle. That can be held securely.
[0019]
After the movable iron core 20 is manufactured by injection molding sintering, it is preferable that the entire surface is subjected to a hard finishing treatment such as nickel plating, chrome plating, PVD treatment, or the like. Injection molding sintering is advantageous in that the movable iron core 20 having a small and complicated shape is manufactured with high dimensional accuracy, and is also intended to enhance the durability of the knitting yarn pressing portion 22 by hard finishing. As shown in FIG. 4, a compression spring 24 as an urging means is disposed between the fixed iron core 19 and the movable iron core, and one end of the compression spring 24 is stored in a concave portion 25 cut out in the movable iron core suction portion 21. ing. The spring pressure of the compression spring 24 is set to about 70 gF, and the sliding resistance of about 30 gF is applied to the knitting yarn 3 when pressed. Since the spring pressure of the compression spring 24 is reduced as described above, the electromagnetic force when the movable iron core is attracted can be reduced.
[0020]
A stopper 26 is formed by bending a part of the housing 9 to which the knitting yarn guide 10 is attached at the upper part from the attaching portion of the knitting yarn guide 10 and extending it downward to face the knitting yarn pressing portion 22. The housing 9 is preferably made of a non-magnetic material such as stainless steel, so that the influence on the magnetic circuit can be suppressed.
[0021]
The knitting yarn holding device 1 configured as described above has the control means 27 shown in FIG. Usually, this control means 27 is stored in a controller 28 of the knitting machine.
The control means 27 obtains the position information of each yarn feeder on the knitting machine 29, for example, the position information for controlling the operation of the electromagnet from the position of the yarn feeder directly in a knitting machine in which the yarn feeder is driven by a belt. In a type knitting machine in which a yarn feeder is entrained by a carriage that reciprocates on a needle bed, the position of the yarn feeder is obtained based on the position of the carriage. Further, the control means 27 obtains knitting information of each yarn feeder from the knitting data 30 stored in the controller via a floppy disk or the like. The knitting information includes the presence or absence of a yarn feeder entrainment command in the knitting course, the running speed of the yarn feeder on the needle bed, the timing of stopping the yarn feeder, and the like. The control means 27 controls the output of the electromagnet based on the yarn feeder position information and the knitting information so that the knitting yarn does not slack.
[0022]
Next, the operation of the knitting yarn holding device 1 of the flat knitting machine having the above configuration will be described.
FIG. 7 shows a case where the knitting yarn 3 unwound from the package passes over the yarn feeder 31 through the side tension device on the left side of the knitting machine. This shows a state in which the yarn feeder 31 has stopped at the point b after finishing. When the yarn feeder 31 reaches the stop position, the control unit 27 cancels the energization command to the electromagnet, and the movable iron core 20 slides rightward by the action of the compression spring 24 to clamp the knitting yarn 3 with the stopper 26. Next, when the yarn feeder 31 is used again in the knitting of the next course and knitting is performed in the left direction, the next knitting start point c is obtained from the knitting information. When the next knitting start point c is located at c1 inside of the previous knitting end point a, when the yarn feeder 31 reaches the point k which is the last knitting end point, an energizing command of the electromagnet is given to the movable iron core. 20 is slid to the fixed iron core side 19 against the compression spring 24 to be sucked and held. Further, when the yarn feeder 31 is not used for knitting of the next course from the knitting information, the pressing of the knitting yarn 3 by the knitting yarn pressing portion 22 is held.
[0023]
When the knitting start point c is located at c2 outside the previous knitting end point a, an energization command is given when the yarn feeder 31 reaches the c2 point. Since the sliding resistance of the knitting yarn 3 between the knitting yarn pressing portion 22 and the stopper 26 is set at about 30 gF as described above, even if an excessive tension is applied to the knitting yarn 3 during knitting, It is pulled out without cutting.
[0024]
As described above, in the knitting yarn holding device 1 of the present embodiment, the members constituting the plurality of electromagnets are arranged side by side on the common bracket 11 and the pressing force of the knitting yarn pressing portion 22 on the knitting yarn 3 is set to a small value. Therefore, the knitting yarn holding device 1 can be downsized. As a result, the amount of magnetic flux for operating the electromagnets can be reduced, and the magnetic circuits of the electromagnets formed on the common bracket are operated without mutual influence. Further, since the operation timing of each electromagnet is obtained from the knitting data and the position information of the yarn feeder, the slack of the knitting yarn can be prevented.
[0025]
Further, by applying the knitting yarn holding device of the present invention to a knitting machine provided with a yarn feed roller in the side tension device, it is possible to prevent a problem that the knitting yarn is excessively fed by the rotation of the roller and the knitting yarn is loosened. You can also.
[0026]
Although the preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the above-described embodiments and can be carried out without departing from the gist of the present invention.
[0027]
【The invention's effect】
According to the first aspect of the invention, a plurality of members constituting the electromagnet of the coil, the bobbin, the movable iron core, the fixed iron core, and the urging means are arranged side by side with respect to the common bracket to form the knitting yarn pressing portion and the knitting. Since the operation of the knitting yarn pressing section is controlled in accordance with the knitting information of the machine, not only the components constituting the device can be simplified, but also the knitting yarn is pressed and held only when necessary. Further, since the knitting yarn guide is provided on the housing, a part of the housing is used as a stopper, and the knitting yarn pressing portion having the above-described configuration is stored in the housing, the apparatus can be made more compact. In addition, since the setting of the pressing force on the knitting yarn is reduced, even if excessive tension is applied to the knitting yarn during knitting, the knitting yarn can be pulled out from the knitting yarn holding device, so that yarn breakage does not occur.
[0029]
According to the second aspect of the present invention, the knitting yarn can be reliably held between the knitting yarn pressing portion and the stopper.
[0031]
According to the third aspect of the present invention, since the urging means is housed in the bobbin, fiber dust or the like scattered from the knitting yarn during knitting does not adhere to the urging means.
[0034]
According to the fourth aspect of the invention, since the positional relationship between the previous knitting end point and the next knitting start point is compared by the control means to obtain the operation timing of the knitting yarn pressing portion, more accurate control can be performed.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example in which a knitting yarn holding device of the present invention is integrated into a side tension device.
FIG. 2 is a sectional view showing a knitting yarn holding device of the present invention. .
FIG. 3 is a plan view of the knitting yarn holding device of the present invention.
FIG. 4 is a sectional view taken along line AA in FIG. 2;
FIG. 5 is a view of FIG. 2 as viewed from the right side of the drawing.
FIG. 6 is a diagram showing an overall configuration of a knitting yarn holding device of the present invention.
FIG. 7 is a diagram showing knitting of a knitted fabric on a knitting machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Knitting yarn holding device 2 ... Package 3 ... Knitting yarn 8 ... Arm mounting base 6 ... Thread guide 7 ... Side tension device 9 ... Housing 10 ... Knitting yarn guide 11 ... Bracket 14 ... Bobbin 19 ... Fixed iron core 20 ... Movable iron Core 22 ... knitting yarn pressing part 24 ... compression spring 26 ... stopper 27 ... control means 28 ... controller 29 ... knitting machine 30 ... knitting information

Claims (4)

A knitting yarn holding device integrally attached to a side tension device of a flat knitting machine, wherein a plurality of knitting yarn guides for guiding a knitting yarn are arranged in a housing made of a non-magnetic material, and a bracket support in the housing is provided. is supported by a surface, said plurality of yarn guide section one common bracket comprising a U-shaped cross-section of a magnetic material extending perpendicular to the yarn passing through, in the bracket, a coil wound around the outer periphery A plurality of bobbins, a movable iron core mounted on the bobbin and reciprocated by penetrating an opening formed in one side wall of the U-shaped portion of the bracket, and a U-shaped other facing the opening. a fixed iron core is fitted in an opening formed in the side wall of the side, the movable iron core is disposed a biasing means for biasing to the side of and away from the fixed iron core, a plurality And the movable iron core has one end thereof. A suction portion of the Teitetsushin, the other end a yarn pressing portion, wherein the housing and the stopper of the said part is opposed to the knitting yarn pressing portion movable iron core, the biasing force of said biasing means When excessive tension is applied to the knitting yarn , the knitting yarn is allowed to be pulled out without causing thread breakage against the pressing force of the knitting yarn by the knitting yarn pressing portion, and the knitting yarn pressing portion and the stopper Control means for controlling the reciprocating motion of the movable iron core in accordance with the knitting information of the knitting machine, such as the position information and knitting data of the yarn feeder, and pressing and releasing the knitting yarn passing through the space area between the knitting yarns. A knitting yarn holding device for a flat knitting machine. In order to prevent the movable iron core from rotating in the bobbin, the sliding portion between the movable iron core and the bobbin is provided with an anti-rotation shape, and the shape of the knitting yarn pressing portion is made smaller in the area of the knitting yarn passing portion as compared with the periphery. 2. The knitting yarn holding device for a flat knitting machine according to claim 1, wherein the upper and lower arcs are further cut out to form a constricted center of the circle . The knitting yarn holding device for a flat knitting machine according to claim 1 or 2, wherein the biasing means is a compression spring housed in a concave portion formed at a tip end of the suction portion of the movable iron core. The control means compares the knitting end point of the previous course of the yarn feeder as knitting information with the knitting start point of the next course, and when the next knitting start point is outside the knitting end point, the yarn feeder sets the knitting start point. When the yarn feeder reaches the previous knitting end point, a control command is issued so that the knitting yarn is released when the The knitting yarn holding device for a flat knitting machine according to any one of claims 1 to 3, wherein a control command is given so as to be released.

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