JPWO2008065746A1 - Needle selection actuator and flat knitting machine - Google Patents

Abstract

Provided are a needle selection actuator and a flat knitting machine capable of preventing a needle selection error caused by the fact that lubricating oil falls on an adsorption surface. In the needle selection actuator 31, grooves 33a, 33b, and 33c are provided on the suction surface 32. The grooves 33a, 33b, and 33c are arranged such that the armature portion of the selector of the knitting needle is relative to the suction surface 32 when a carriage that includes the needle selection actuator 31 in the needle selection mechanism reciprocates along the needle bed. Are provided so as to extend between both ends of the suction surface 33 in the horizontal direction of the drawing. By using the needle selection actuator 31 provided with such grooves 33a, 33b, and 33c in place of the needle selection actuator having no groove on the suction surface with a flat knitting machine, the lubricating oil can be scraped out, resulting from the adhesion of the lubricating oil. It is possible to reduce needle selection mistakes.

Description

  The present invention relates to a needle selection actuator mounted on a carriage in order to perform needle selection with a flat knitting machine, and a flat knitting machine including such a needle selection actuator.

  Conventionally, in a flat knitting machine, needle selection and knitting drive are performed by a needle selection mechanism and a cam mechanism mounted on a carriage that runs along the needle bed, with respect to a large number of knitting needles arranged on the needle bed. The ground is organized. When a needle selection actuator that uses electromagnetic attraction is used as the needle selection mechanism, high-speed operation is possible without a movable part (see, for example, Patent Document 1 and Patent Document 2).

  FIG. 4 shows a schematic configuration of a flat knitting machine 1 having a needle selection mechanism similar to that of Patent Document 2. The flat knitting machine 1 is provided with a plate-like needle bed 2 extending in a direction perpendicular to the paper surface. In the needle bed 2, grooves that are perpendicular to the longitudinal direction that is the extending direction and extend in the lateral direction on the paper surface are formed at a constant pitch. In the longitudinal direction of the needle bed 2, the carriage 3 reciprocates. A needle plate 4 is inserted into the groove of the needle bed 2. When all the needle plates 4 are inserted into the needle bed 2, the needle plates 4 are fastened and fixed by the plate fastening wires 5. Such needle beds 2 are arranged to face each other so as to form a pair with the tooth opening 6 interposed therebetween. A sinker plate 7 is mounted on the side of the mouth 6 of the needle bed 2 and is fixed by a sinker fixing wire 8. A tooth opening wire 9 is inserted near the tip of the sinker plate 7 on the side of the mouth opening 6.

  In the flat knitting machine 1, the needle bed 2 is arranged in front of and behind the tooth opening 6 when viewed from the front during normal use as a mechanical device. Each needle bed 2 is high on the side facing the mouth 6, and becomes lower when it is away from the mouth 6. When viewed from the side of the mouth 6, the front and back needle beds 2 are inclined in an inverted V shape. However, in the drawing, for convenience of explanation, only one needle bed 2 is described as a substantially horizontal posture. Hereinafter, the front-rear direction is described with the direction approaching the tooth mouth 6 as the front and the direction away from the tooth mouth 6 as the rear. The vertical direction is described with the bottom side of the needle bed 2 being the lower side and the front side being the upper side.

  A needle groove is formed between adjacent needle plates 4 on the needle bed 2. A knitting needle 10 is accommodated in each needle groove. The knitting needle 10 performs knitting of the knitted fabric while sliding and displacing in the left-right direction in the figure, that is, the front-rear direction with reference to the tooth opening 6. The knitting needle 10 is configured by combining a needle 11, a needle jack 12, a select jack 13 and a selector 14. The needle 11 performs a knitting operation of the knitted fabric by combining advancing and retreating toward the tooth opening 6 side and opening and closing by the lever 11b of the hook 11a at the tip. An engaging portion 11 c is provided at a position behind the middle of the needle 11.

  The tip portion 12 a of the needle jack 12 is engaged with the engaging portion 11 c of the needle 11. A bat 12b is provided in the middle of the needle jack 12, and a portion from the periphery of the bat 12b to the tail end portion 12c functions as a spring that biases the bat 12b to rise upward in the needle groove. Between the butt 12b and the tail end portion 12c of the needle jack 12, the tip pressing portion 13a of the select jack 13 is pressed.

  The select jack 13 receives a pressure from the presser of the cam mechanism mounted on the carriage 3 by the pressure receiving bat 13b. When this pressing is received from above, the select jack 13 presses the needle jack 12 via the tip pressing portion 13a and presses the butt 12b of the needle jack 12 so that it does not protrude from the needle groove. A protrusion 13c is provided slightly behind the pressure receiving bat 13b of the select jack 13. A bifurcated portion 13 d is formed at the rear portion of the select jack 13. The protrusion 13 c of the select jack 13 receives forward drive from the selector 14. The side portion of the pressure-receiving butt 13b of the select jack 13 receives a backward drive from the cam mechanism.

  The selector 14 has a front bat 14a, a middle bat 14b, and a rear bat 14c. The front butt 14a serves as a swing fulcrum when the selector 14 receives the action of the needle selection mechanism. The middle bat 14b is driven when displaced backward. The rear bat 14c is driven when displaced forward. When the front end portion 14d comes into contact with the protrusion 13c of the select jack 13 during the forward displacement, the selector 14 pushes the select jack 13 and displaces it toward the tooth opening 6 side. The rear side of the selector 14 with respect to the front bat 14a is bifurcated, and the lower side is an elastic leg 14e, which is biased so that the upper side is lifted. An intermediate butt 14b and a rear butt 14c are provided on the upper side of the selector 14 which is divided into a bifurcated shape, and the tail end is a contact portion 14f.

  The needle plate 4, the straps 16 a and 16 b, and the wires 17 a, 17 b and 17 c are inserted through the needle plate 4 in a direction perpendicular to the paper surface. The needle pressing plate 15 regulates the needle 11 from above so that the needle 11 does not fly out of the needle groove. The straps 16a and 16b are pressed so that the selector 14 does not jump out of the needle groove. The wires 17a, 17b, and 17c function as stoppers and the like.

  A large number of knitting needles 10 arranged on the needle bed 2 are selected by a needle selection mechanism mounted on the carriage 3 and are knitted and driven by a cam mechanism. A cam plate 21 provided with a cam mechanism and a selector plate 22 provided with a needle selection mechanism are disposed on the bottom surface of the case 20 of the carriage 3 so as to face the surface of the needle bed 2. However, illustration of the cam mechanism and the needle selection mechanism is omitted. A needle selection actuator 24 is attached to the rear end of the selector plate 22 via a bracket 23.

  An adsorption surface 25 is formed on the surface of the needle selection actuator 24. The suction surface 25 faces the contact portion 14 f of the selector 14. A plurality of magnetic poles 25 a and 25 b are arranged on the attracting surface 25. The actual attracting surface 25 is manufactured so that a synthetic resin is filled as a non-magnetic material 25c between magnetic materials on which magnetic poles 25a and 25b are formed at end portions, and after the magnetic material is fixed, the surface is flattened. ing.

  FIG. 5 shows a configuration of the suction surface 25 in the needle selection actuator 24 (see, for example, Patent Document 3). In Patent Document 3, two control attracting portions having magnetic poles 25a and 25b and a nonmagnetic material 25c are sandwiched between three noncontrolling attracting portions having magnetic poles 26a, 26b and 26c and nonmagnetic materials 26d and 26e. It is arranged. Magnetic flux generated from the coils 27a and 27b is also supplied to the control attracting portion together with the permanent magnet. The energization of the coils 27a and 27b cancels the magnetic flux from the permanent magnet, and the control attracting unit can control to weaken the attracting force. Only the magnetic flux from the permanent magnet is supplied to the non-controlled attracting unit. The selector plate 22 of the carriage 3 shown in FIG. 4 is provided with a presser that presses the tail portion of the selector 14 from above and causes the contact portion 14f to come into contact with the non-controlling suction portion. The control adsorption unit selects for each knitting needle 10 whether to continue attracting the contact portion 14f of the selector 14 or to cancel the adsorption. For this reason, the length of the control suction portion shown in the horizontal direction in the figure is as short as about one pitch of the knitting needle 10 and the interval with the non-control suction portion is also narrowed. Therefore, leakage of magnetic flux from the non-control suction portion If there is, it will affect the suction release control in the control suction unit.

  In Patent Document 3, the magnetic fluxes 26a, 26b, and 26c are shifted from the magnetic poles 25a and 25b so that the leakage magnetic flux from the non-controlled suction portion is less likely to affect the control of the control suction portion. Yes. The copper plate 28 is provided between the control attracting part and the non-control attracting part in order to suppress the leakage magnetic flux and configure an independent magnetic circuit in each attracting part. On the suction surface 25, protectors 29a and 29b are arranged on both sides in the width direction, which is the vertical direction in the figure. The entire needle selection actuator 24 is accommodated in the case 30.

As a countermeasure against leakage magnetic flux on the attracting surface 25 of the needle selection actuator 24, as shown in FIG. 5, a method of shifting the arrangement of the magnetic poles 25a and 25b in the control adsorption unit and the arrangement of the magnetic poles in the non-control adsorption unit as well as There is also a method of reducing leakage by distributing magnetic resistance (see, for example, Patent Document 4).
Japanese Patent Publication No. 1-338898 Japanese Patent Laid-Open No. 9-241952 JP-T-2004-507627 International Publication No. 01/072022 Pamphlet

  In the knitting needle 10 as shown in FIG. 4, the knitting operation is performed by the cam mechanism mounted on the carriage 3 acting on the bat 12 b of the needle jack 12. In order to perform the knitting operation smoothly, lubricating oil is supplied in the vicinity of the bat 12b. Since the needle bed 2 is inclined so that the tooth opening 6 side is high and the needle selection actuator 24 side is low, the lubricating oil supplied to the vicinity of the butt 12b flows down in the needle groove, and the armature of the selector 14 It descends to the suction surface 25 of the portion 14f and the needle selection actuator 24. When lubricating oil accumulates on the armature portion 14f and the suction surface 25, depending on the environment in which the flat knitting machine 1 is installed, the armature portion 14f and the suction surface 25 are bonded to each other by the lubricating oil. Even in this case, there is a possibility of making a needle selection error in which the suction cannot be released by the control suction unit.

  In the configuration disclosed in Patent Document 1, since a portion corresponding to the needle selection actuator 24 is provided on the carriage 3 side, it is considered that the problem of adsorption by the lubricating oil does not occur. However, a presser for forcibly contacting the portion corresponding to the contact portion 14f with the suction surface 25 also needs to be provided on the carriage 3 side. In the member corresponding to the selector 14, the swing fulcrum is provided between the portion pressed by the presser and the portion corresponding to the armature portion 14 f, so that the length of the member corresponding to the selector 14 increases in the front-rear direction. The needle mechanism becomes large.

  An object of the present invention is to provide a needle selection actuator and a flat knitting machine that can prevent a needle selection error caused by the lubricant falling on the adsorption surface.

The present invention is mounted on a carriage that runs along the needle bed of the flat knitting machine, and selectively drives the knitting needles arranged in parallel to the needle bed. In the needle selection actuator provided with a suction surface on which a plurality of magnetic poles including a control magnetic pole that can electromagnetically control the suction state are arranged,
The needle selection actuator is characterized in that a groove penetrating both ends in the traveling direction of the carriage is formed on the suction surface so as to pass through at least one magnetic pole.

  In the present invention, the groove is formed so as to pass through the control magnetic pole.

  Also, in the present invention, the attracting surface is arranged with a magnetic pole formed so that the groove passes, and is arranged adjacent to the magnetic pole in the traveling direction and spaced in the width direction perpendicular to the traveling direction. Two magnetic poles in which the groove is formed are provided.

In the present invention, the adsorption surface includes
At least two of the control magnetic poles are spaced apart in the width direction;
Adjacent to the two control magnetic poles in the traveling direction, there are at least three non-control magnetic poles that perform only the adsorption of the armature portion with a gap in the width direction, and the interval between the non-control magnetic poles and the control magnetic pole interval is a width. Arranged so as to be displaced in the direction,
It is characterized by that.

Further, the present invention provides a flat knitting in which the front and back needle beds are opposed to each other across the tooth opening, and the front and back needle beds are inclined so as to rise when approaching the tooth opening and to descend when leaving the tooth opening. In the machine
Mounted on a carriage that runs along the surface of each needle bed, and selectively drives the knitting needles arranged side by side on the needle bed. A suction surface on which a plurality of magnetic poles including a control magnetic pole capable of electromagnetically controlling the attracting state are disposed,
A needle selection actuator having a groove formed on the suction surface so as to pass through both ends of the carriage in the traveling direction and pass through at least one magnetic pole,
It is a flat knitting machine characterized by including.

  According to the present invention, the needle selection actuator is mounted on a carriage that runs along the needle bed of the flat knitting machine, and a groove that passes through both ends of the carriage in the running direction passes through at least one magnetic pole on the suction surface. Formed. As described above, it is considered that if the groove is provided in the magnetic pole, there is a possibility that the attracting force may be lowered. The inventor of the present invention has found that even a small groove width that keeps the decrease in the attractive force within an allowable range is effective in preventing needle selection mistakes. That is, since the groove in the running direction is formed, even when the lubricating oil or the like falls on the suction surface of the needle selection actuator, the lubricating oil is used when the armature portion of the knitting needle selector is sucked and relatively slid. Etc. can be scraped out along the groove to prevent needle selection mistakes.

  Further, according to the present invention, since the groove passes through the surface of the control magnetic pole, even if the lubricating oil falls on the control magnetic pole, the lubricating oil is scraped out along the groove, and the lubricating oil is used for electromagnetic control of the attracted state. The sticking of the ink is less likely to be affected, and needle selection mistakes can be prevented.

  According to the present invention, the attracting surface includes a magnetic pole in which a groove is formed, two magnetic poles adjacent to the magnetic pole in the running direction, arranged in the width direction with an interval therebetween, and the groove is formed in the interval. At least. A groove is formed in the interval between the two magnetic poles, and a decrease in the attractive force of the two magnetic poles can be prevented.

  Further, according to the present invention, the control magnetic pole can be made less susceptible to the influence of magnetic flux leaking from the non-control magnetic pole that performs only adsorption.

  Further, according to the present invention, the front and back needle beds are opposed to each other with the tooth opening interposed therebetween, and the front and rear needle beds are inclined so as to rise when approaching the tooth opening and to descend when leaving the tooth opening. Even if the needle selection actuator is arranged on the lower side in the flat knitting machine and the lubricating oil accumulates on the suction surface, a groove is provided on the suction surface, so that a needle selection mistake can be prevented.

FIG. 1 is a diagram showing a needle selection actuator 31 as an embodiment of the present invention as an embodiment of the present invention as viewed from the suction surface 32 side. FIG. 2 is a cross-sectional view taken along the section line II-II in FIG. FIG. 3 is a diagram showing a needle selection actuator 41 as another embodiment of the present invention as seen from the suction surface 42 side. FIG. 4 is a partial side sectional view showing a schematic configuration of a conventional flat knitting machine 1. FIG. 5 is a view showing the needle selection actuator 24 of FIG. 4 as viewed from the suction surface 25 side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flat knitting machine 2 Needle bed 3 Carriage 14 Selector 14f Contact pole part 25a, 25b; 26a, 26b, 26c; 46a, 46b Magnetic pole 25c; 26d, 26e; 46c Nonmagnetic material 31, 41 Needle selection actuator 32, 42 Adsorption surface 33a, 33b, 33c; 43a, 43b, 43c groove

  FIG. 1 shows a schematic configuration of a suction surface 32 of a three-row yoke type needle selection actuator 31 as one embodiment of the present invention. Parts corresponding to the needle selection actuator 24 shown in FIGS. 4 and 5 in the needle selection actuator 31 are denoted by the same reference numerals, and redundant description is omitted. In the needle selection actuator 31, grooves 33a, 33b, and 33c are provided on the suction surface 32. The grooves 33a, 33b, and 33c are arranged in the horizontal direction of the drawing in which the contact portion 14f of the selector 14 moves relative to the suction surface 32 when the carriage 3 reciprocates with respect to the needle bed 2. 32 is provided so as to extend between both ends. By using the needle selection actuator 31 provided with such grooves 33a, 33b, and 33c in place of the needle selection actuator 24 in the flat knitting machine 1 of FIG. 4, the lubricating oil can be scraped when the carriage 3 travels. It is possible to reduce needle selection mistakes resulting from the adhesion of.

  The central groove 33b passes through the portion of the nonmagnetic material 25c that is spaced between the magnetic poles 25a and 25b of the control attracting portion. The non-controlled attracting part is formed so as to penetrate the surface of the magnetic pole 26b. Although the grooves 33a and 33c on both sides of the central groove 33b pass through the nonmagnetic material 26d between the magnetic poles 26a and 26b and the nonmagnetic material 26e between the magnetic poles 26b and 26c, respectively, The part is formed so as to penetrate the surfaces of the magnetic poles 25a and 25b.

  In addition, the length P that the magnetic poles 25a and 25b of the control suction portion have in the traveling direction corresponds to the arrangement pitch of the knitting needles 10 on the needle bed 2. For example, for 12 gauge (G) in which 12 knitting needles are arranged per 25.4 mm (1 inch), the distance is 2 mm. The width T that the magnetic poles 25a, 25b have in the width direction perpendicular to the traveling direction is, for example, 3.5 mm.

  FIG. 2 shows a cross-sectional configuration viewed from the section line II-II in FIG. As described above, since the central groove 33b is provided on the surface of the magnetic pole 26b, it is desirable that the central groove 33b be within a range in which a decrease in the attractive force of the magnetic pole 26b can be allowed. In particular, in the portions formed on the magnetic poles 25a, 25b, and 26c, the widths of the grooves 33a, 33b, and 33c affect the attracting force, but the depth does not affect the attracting force. However, if the depth is increased, it will not contribute to the effect of oil countermeasures that scrape out the lubricating oil. In the figure, if the groove width W shown in the horizontal direction is about 0.5 mm to 1.2 mm, and the depth D shown in the vertical direction in the figure is about 0.1 mm to 0.5 mm, the decrease in the adsorption force is It is within the allowable range, and it has been found that the effect of oil countermeasures can be obtained.

  In addition, the cross-sectional shape of the grooves 33a, 33b, and 33c is an arc shape. Such a cross-sectional shape is such that when the space between the magnetic materials is filled with the liquid synthetic resin as the nonmagnetic materials 26d and 26e, the wire having a circular cross section is held on the surface, and the wire is removed after the synthetic resin is solidified. It can be obtained by polishing the entire surface 32. The cross-sectional shape of the grooves 33a, 33b, and 33c may be a shape such as a rectangle that is different from the arc shape, and the grooves 33a, 33b, and 33c are formed by cutting after the suction surface 32 is polished flat. You can also.

  In the case 30 below the surface of the nonmagnetic material 26d, 26e, a permanent magnet 34, coils 27a, 27b and magnetic cores 35a, 35b for supplying magnetic flux to the control attracting portion, and a permanent magnet for supplying magnetic flux to the non-control attracting portion. 36a, 36b, yokes 37a, 37b, 37c and the like are accommodated. The end surfaces of the suction surfaces 32 of the yokes 37a, 37b, and 37c arranged in three rows are the magnetic poles 26a, 26b, and 26c of the non-controlled suction portions, respectively. Each component is fixed by filling with a synthetic resin to be the nonmagnetic material 26d, 26e.

  FIG. 3 shows a schematic configuration of a double row yoke type needle selection actuator 41 as another embodiment of the present invention. In the needle selection actuator 41, portions corresponding to the needle selection actuator 31 shown in FIG. 1 or the needle selection actuator 24 shown in FIG. The suction surface 42 of the needle selection actuator 41 has three grooves 43a, 43b, and 43c. It is formed. Three grooves 43a, 43b, and 43c are provided at positions corresponding to the grooves 33a, 33b, and 33c in FIG. The grooves 43a and 43c on both sides are formed so as to penetrate the surfaces of the magnetic poles 25a and 46a; It is formed.

  1 and 3, a total of three grooves 33a, 33b, and 33c; 43a, 43b, and 43c are provided. However, the groove width and the number of the grooves are adjusted so that a needle selection error hardly occurs according to the environment. It is desirable. In FIG. 1, the grooves 33a and 33c pass through the magnetic poles 25a and 25b, respectively. In FIG. 3, the grooves 43a and 43c pass through the magnetic poles 46a and 46b, respectively, but at least one groove may pass through the magnetic poles. Moreover, as shown in FIG. 1 and FIG. 3, you may make it provide the groove | channel inclined rather than the horizontal groove | channel 33a, 33b, 33c; 43a, 43b, 43c horizontally. When the flow rate of the lubricating oil is large, if it is inclined, the flow of the lubricating oil can be promoted and the amount of adhesion to the adsorption surfaces 32 and 42 can be reduced.

Claims (5)

Mounted on a carriage that runs along the needle bed of a flat knitting machine and selectively drives the knitting needles arranged side by side on the needle bed. In a needle selection actuator having a suction surface on which a plurality of magnetic poles including a controllable control magnetic pole are arranged,
A needle selection actuator, wherein a groove penetrating between both ends in the traveling direction of the carriage is formed on the suction surface so as to pass through at least one magnetic pole.   The needle selection actuator according to claim 1, wherein the groove is formed so as to pass through the control magnetic pole.   The suction surface is arranged with a magnetic pole formed so as to pass through the groove, and is arranged adjacent to the magnetic pole in the traveling direction and spaced in the width direction perpendicular to the traveling direction, and the groove is formed at the spacing. The needle selection actuator according to claim 1, further comprising two magnetic poles. On the adsorption surface,
At least two of the control magnetic poles are spaced apart in the width direction;
Adjacent to the two control magnetic poles in the traveling direction, there are at least three non-control magnetic poles that perform only the adsorption of the armature portion with a gap in the width direction, and the interval between the non-control magnetic poles and the control magnetic pole interval is a width. Arranged so as to be displaced in the direction,
The needle selection actuator according to claim 3. In the flat knitting machine, the front and back needle beds are opposed to each other across the mouth, and the front and back needle beds are inclined so as to rise when approaching the mouth and descend when leaving the mouth.
Mounted on a carriage that runs along the surface of each needle bed, and selectively drives the knitting needles arranged side by side on the needle bed. A suction surface on which a plurality of magnetic poles including a control magnetic pole capable of electromagnetically controlling the attracting state are disposed,
A needle selection actuator having a groove formed on the suction surface so as to pass through both ends of the carriage in the traveling direction and pass through at least one magnetic pole,
A flat knitting machine characterized by including.

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