JPH09241952A - Needle selecting apparatus in flat knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle selecting apparatus more compact than a conventional one by improving a selector, a selector jack and a cam layout of a carriage and to reduce adsorption power of a permanent magnet or an electromagnet of a needle selecting actuator by stably adsorbing an armature of a selector on the adsorption face of the needle selecting actuator. SOLUTION: A needle bed 1 is equipped with a knitting needle 13, a needle jack 14, a selector jack 20 and a selector 27 and the selector 27 is furnished with three butts 16, 22 and 24. The front butt 16 is brought into contact with a standard face of a carriage to form a rocking support. The selector 27 is moved backward by the second butt 22 and the selector 27 is moved forward by the rear butt 24. Two pressing cams of the carriage press the rear butt 24 to adsorb the selector 27 on a permanent magnet. Two raising cams of the carriage advance the selector 27 to a position H and a position A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle selecting device for a flat knitting machine.

[0002]

2. Description of the Related Art A large number of knitting needles are arranged in a needle bed of a flat knitting machine. The carriage that reciprocates on the needle bed is provided with a needle selection device, and the needle selection device selects each knitting needle according to the knitting data and moves the knitting needle back and forth. As a result,
It is possible to knit knitted fabrics such as jacquard patterns and organizational patterns.

As a related prior art, as a needle selecting device of a flat knitting machine, a device using an oscillating electromagnet as described in JP-A-6-29118 and Japanese Patent Publication No. 1-388.
There is known one using a fixed electromagnet described in Japanese Patent Application Laid-Open No. 98 and Japanese Patent Application Laid-Open No. 5-321102. The one using the fixed electromagnet can select needles at a higher speed than the one using the swinging electromagnet, and since the needle selection actuator is fixed, there are few troubles during the knitting machine operation.

The fixed electromagnet of the needle selection actuator is
There are an energization holding type that energizes the coil magnetic pole to adsorb the required selector, and an energization release type that energizes the coil magnetic pole to release the adsorption of the required selector. The energization release type needle selection device is easy to handle when there is a power failure or when power is restored after a power failure.

Japanese Patent Publication No. 1-38898 discloses a current release type needle selecting device. In this needle selection device, a selector is attached to the needle bed, and a swinging fulcrum is provided at approximately the center of the selector. The top surface of the tip of the selector is used as an armature that is attracted to the needle selection actuator, and the top surface of the tail portion of the selector is pressed by the pressing cam. The control butt provided near the tail portion is urged upward by a spring so as to project outside the needle groove. Further, a pressing cam is arranged at a position along the tail of the selector on the carriage that reciprocates on the needle bed. The pressing cam lowers the tail portion of the selector into the needle groove and causes the armature to project out of the needle groove. The carriage is provided with a needle selection actuator composed of a permanent magnet and an electromagnet. The permanent magnet attracts the armature, and the electromagnet cancels the magnetic flux of the permanent magnet to release the attraction of the selector. In this way, the necessary knitting needles are selected.

[0006]

In the needle selecting device having the above construction, the armature and the end portions are provided at both ends of the selector, and the end portions are controlled by the cams to advance the selector. Therefore, there is a problem that the size of the selector in the length direction becomes large, and the size of the carriage and the needle bed also becomes large.

In view of the above problems, it is an object of the present invention to improve the selector, selector jack and carriage cam layout, and to provide a needle selecting device which is more compact than the conventional one.

Further, according to the present invention, the armature of the selector is stably attracted to the attraction surface of the needle selection actuator, so that the attraction force of the permanent magnet or electromagnet of the needle selection actuator can be made smaller and the needle selection error can be prevented. The purpose is to

[0009]

A needle selecting device for a flat knitting machine according to the present invention comprises at least a pair of needle beds and a carriage reciprocating on the needle beds, and each needle bed has a plurality of needle grooves. Then, it is used in a flat knitting machine in which a knitting needle, a select jack and a selector are arranged in each needle groove, and the selector has a head portion on the select jack side and a tail portion on the opposite side, and the head portion of the selector. A swing restricting means for restricting swing motion of the selector is provided in the vicinity, and a retreat control means for controlling retreat from the selector jack side of the selector is provided at the center of the selector, and a tail portion of the selector is provided. A forward control means for controlling the forward movement of the selector to the select jack side is provided in the vicinity of the selector, and the carriage is provided with a portion near the tail portion of the selector as the first needle selecting portion. By pressing the needle selection actuator for selectively and magnetically adsorbing / desorbing and the advance control means at at least two positions of the second needle selecting section, the selector is brought into contact with the first needle selecting section of the needle selecting actuator. A first pressing cam means for contacting the first pressing cam means and a forward movement control means, and a first raising cam means and a first raising cam means for advancing the selector detached and attached at the first needle selection portion to the select jack side. By pressing the advance control means of the selector advanced in step S1, the second pressing cam means for contacting the second needle selection portion of the needle selection actuator and the advance control means are guided to perform the second selection. The selector detached at the needle portion is advanced by either the second lasing cam means for further advancing to the select jack side or the above-mentioned lasing cam means. The Rector, and guides the reverse control means, characterized by providing a retraction cam means for retracting the select jack opposite side.

Preferably, the rocking restricting means, the retreating control means, and the advancing control means each comprise a butt provided on the carriage side of the selector, and the needle selecting actuator is provided on the opposite side of the advancing control means of the selector. Adsorb and desorb.

Preferably, the selector is pushed by the select jack toward the side protruding from the needle groove, and the select jack is pushed forward by the advance of the selector to the select jack side.

Preferably, the carriage comprises a plurality of needle selecting devices, and at least one of the needle selecting devices has a peak-shaped first lasing cam means and a second pressing member provided near the peak of the first lasing cam means. Cam means, second lasing cam means provided on both sides of the first lasing cam means, and first pressing cam means provided on both sides of the second lasing cam means.

Preferably, the carriage is provided with a reference surface which is in contact with the rocking restricting means and serves as a rocking reference surface of the selector.

Preferably, slopes are provided on both sides of the reference surface to prevent the rocking restricting means from colliding with the reference surface.

In the present invention, the selector is mounted on the select jack in the needle groove of the needle bed. The first pressing cam means provided on the carriage side presses the advance control means of the selector tail portion, and the armature is attracted to the needle selection actuator. The needle selection actuator has, in addition to the attraction section made of a permanent magnet or the like, a needle selection section made of two electromagnets with a space in the traveling direction of the carriage. The selector selected in the preceding needle selection unit is no longer adsorbed, and the selector not selected remains adsorbed. In the selector which is selected and the suction is stopped, for example, the bat which constitutes the advance control means projects outside the needle groove and moves forward by the action of the following first raising cam means, and as a result, the bat of the select jack also advances. To do. The selector that is not selected is not affected by the selector raising cam, so that the corresponding select jack bat does not advance.

Next, in the selector that has advanced by the action of the first raising cam means, the forward movement control means, for example, the butt, is pushed by the second pushing cam means. As a result, the armature is again attracted to the needle selection actuator and is selected by the needle selection unit that follows. The advancing control means of the selector, which has not been adsorbed, protrudes from the needle groove, for example, and further advances by the subsequent second lasing cam means, and as a result, the select jack also advances. In this way, the recto jack is sorted into three positions. Further, the selector in the advanced position is retracted to the initial position by the retracting cam means and returns to the state before the needle selection.

Further, when the selector passes through the needle selection area, the rocking restricting means such as a protrusion formed on the head of the selector comes into surface contact with a reference surface for positioning the selector provided on the carriage. This reference surface, that is, the guide surface serves as a reference surface when the selector oscillates by the pressing cam means.
As a result, the armature of the selector can be brought into surface contact with the needle selection actuator, and reliable suction is guaranteed.

The needle selecting device of the flat knitting machine of the present invention comprises at least a pair of needle beds and a carriage that reciprocates on the needle beds, and each needle bed has a plurality of needle grooves, and each needle groove. Used in a flat knitting machine in which a knitting needle, a select jack and a selector are arranged in the carriage, the carriage has a needle selecting actuator having an attracting position made of a permanent magnet and a detaching position made of an electromagnet, and the selector is mounted on the select jack. , And the selector is equipped with an armature to be absorbed and desorbed by the needle selection actuator, and the selector is biased so that the armature moves away from the needle selection actuator. A protrusion is provided at the head of the carriage so as to protrude from the needle groove, and when the armature is attracted to the needle selection actuator, the carriage is provided with the protrusion. Providing a contact with the reference plane.

Preferably, the selector has a select jack side as a front end and an opposite side as a rear end, and the projecting portion is arranged near the front end of the selector and the armature is arranged near the rear end.

According to the present invention, a flat knitting machine is provided with a needle selection actuator provided with an attracting surface using a magnet and at least two needle selecting portions using an electromagnet, so that the selector selectively absorbs and desorbs the needle to select the needle. In the needle selecting device of the machine, a memory for storing needle selecting data of the knitting machine being knitted, and means for determining and driving the magnitude of the drive signal of the electromagnet based on the stored needle selecting data are provided. It is characterized by that.

[0021] Preferably, the needle selecting device is further provided with peak-shaped first lasing cam means, second pressing cam means provided near the peak of the first lasing cam means, and both sides of the first lasing cam means. The second lasing cam means and the first pressing cam means provided on both sides of the second lasing cam means. The drive signal determining means is based on the number of selectors under the control of the first lasing cam means. Then, the drive signal of the first needle selection unit is determined, and the second drive signal is determined based on the number of selectors under the control of the second raising cam means.
Drive signal of the needle selection unit of.

In the present invention, the number of selectors attracted to the actuator is obtained based on the needle selection data, and the magnitude of the drive signal for the electromagnet is determined based on this. Obtaining the number of selectors is equivalent to obtaining the complement of selectors existing in the area.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings. In the needle selecting device of this embodiment, the knitting needle is selectively guided to three positions, the forward position is knit, the intermediate position is tuck, and the rest position is welt, and they are referred to as A, H, and B positions, respectively. The needle selecting device of this embodiment can also be used for transfer and the like, and the rest position is also the initial position of the knitting needle. In this specification, the movement toward the trick gap side between the pair of needle beds is called forward movement, and the opposite movement is called backward movement. Further, the cam of the carriage has a high side on the side approaching the needle bed and a low side on the side away from the needle bed.

FIG. 1 shows a state before the knitting needle is selected by the carriage, and the cam of the carriage is omitted for convenience of explanation. The needle bed 1 is provided with a plurality of parallel grooves 2, a needle plate 3 is fitted in the grooves 2, and a needle groove 4 is formed between two adjacent needle plates 3 and 3. The band 5 is inserted through the needle plates 3 provided in a large number of rows to prevent the knitting needles and the like from falling off. In the needle groove 4, the knitting needle 1
3, the needle jack 14, the select jack 20, and the selector 27 are slidably inserted.

The needle jack 14 has a head portion 15 fitted to the tail portion of the knitting needle 13, a needle jack butt 16 is formed in the center portion, and an elastic leg portion 17 provided at the tail portion moves the needle jack butt 16 out of the needle groove. Energize so that it protrudes into the. The bat 16 is a bat for controlling the knitting needle,
It may be provided on the knitting needle 13 instead of the needle jack 14. Reference numeral 11 denotes a wire that passes through the needle groove 3 through the needle plate 3 and contacts the upper surface of the needle jack 14 to regulate the highest position of the butt 16.

Numeral 20 is a select jack, and its head portion 2
1 is located on the needle jack 14, the upper surface is in contact with the wire 10, and the forked portions 23a and 23b are provided. The forked portions 23a and 23b contact the wire 9. Wire 9,
Reference numeral 10 penetrates the needle plate 3 to hold the select jack 20 in the needle groove. The needle jack 14 tries to protrude out of the needle groove, and this resilience is exerted on the select jack 2
Add to the top 21 of 0, select jack bat 22
Is urged to stick out of the needle groove. The select jack 20 moves back and forth in the needle groove, and the most advanced position is the leading part 2
1 is the position where it abuts on the wire 11. At this time, the bat 22 takes the A position. Leg 23 below the fork
In b, three concave portions 25 formed on the upper surface are
Position each of H and B positions. The recess 25 holds the wire 9 together with the upper leg 23a. On the upper surface of the jack 20, slightly behind the bat 22, a bat 24
Is provided. Selector 2 above Jack 20
7 is arranged, and the head portion 28 thereof engages with the bat 24.
A select jack presser described later is provided on the carriage, and when the select jack presser pushes the jack 20 into the needle groove, the butt 16 of the jack 14 is also immersed in the needle groove and the engagement with the needle control cam of the carriage is lost. Be done.

The selector 27 is arranged on the jack 20, and the elastic leg pieces 29 of the selector 27 are compressed and deformed by the straps 6 and 7 inserted into the needle plate 3 and the jack 20. The selector 27 is inserted into the needle groove in this state, and is always biased so as to protrude outside the needle groove. A head portion 28 for engaging the butt 24 and advancing the jack 20 to the H position or the A position is provided at the head portion of the selector 27, and an armature 30 attracted by a needle selecting actuator 80 described later is provided at the tail portion. It is provided. When the selector 27 is attached to the needle groove 4, the armature 30 projects from the rear end of the needle groove 4. On the upper surface of the selector 27, three bats 32, 33, 34 are formed from the beginning.

Next, the carriage 40 will be described. FIG.
The right half of the symmetrical carriage 40 is shown as V- in the figure.
The V line is the center line of the carriage 40. Carriage 40
Has three knitting locks, and there are a total of four needle selectors 100, 100 'between each knitting lock and on both sides. Then, each needle selecting section selects one knitting needle at each of three positions A, H, and B. The horizontal hatching part in the figure indicates a slope that acts on the upper surface of the bat of the selector, and the cam that acts when the carriage moves to the left as shown in the figure is denoted by a.
The reference numeral b is given to the cam that acts when moving to the right. A selector plate 61 and a cam plate 41 are attached to the carriage 40, and the selector plate 61 controls the selector 27. The cam plate 41 is closer to the needle bed 1 than the selector plate 61, and controls the butt 22 and the butt 16. The cam plate 41 has a central knitting lock 46 and knitting locks 46 ′ at both ends, and these structures are almost the same, and the central knitting lock 46 will be described. In addition, similar reference numerals are given to portions where the operation of the carriage 40 is common.

The knitting lock 46 is provided with a needle raising cam 42, and a pair of stitches 43, 43 are provided on both sides thereof. The crest 43 can slide parallel to the slope of the raising cam 42. Reference numerals 44 and 45 are guide cams for guiding the bat 16. These cams are cams that control the knitting needles. Cam surfaces 44a and 44b are formed on the lower surface of the guide cam 44 and act on the butt 22 advanced by the needle selection to return the select jack to the initial position (B position). Below the raising cam 42, the select jack pressers 47, 48, 4 which can selectively move in and out are selectively operated.
9 are provided, which act on the select jacks selected in the A, H, and B positions to press the butt 22 into the needle groove.

Selector guide cams 64, 65 and 70 are attached to the selector plate 61 between the knitting locks. The cam 65 and the cam 70 may be integrated. An upper portion of the selector guide cam 70 at the lowermost end constitutes a W-shaped selector raising cam 71, and controls the selector butt 34. An H position raising cam 73 including cams 73a and 73b is provided at the center of the W shape, and the select jack 20 is advanced to the H position via the selector 27. A position raising cam 74 composed of cams 74a and 74b is provided on both outer sides of the H position raising cam 73, and the select jack is advanced to the A position. A selector first pressing cam 76 composed of selector pressing cams 76a and 76b is provided on both outer sides of the A position raising cam 74, and presses the butt 34 to sink it into the needle groove, so that the armature 30 is attached to the suction surface of the actuator 80. Abut.

On the uppermost selector guide cam 64,
Selector lowering cam 6 including lowering cams 63a and 63b
Selector 2 which is provided with 3 and controls bat 33 to move forward
7 is moved back to the initial position. Further, the guide cam 64 is provided with a selector positioning guide surface 62 so that when it is attracted by the actuator 80, it is brought into surface contact with the butt 32 for positioning.

The selector guide cam 65 constitutes a selector second pressing cam 66 composed of symmetrical cam slopes 66a and 66b. This cam is above the cam 73,
The butt 34 of the selector 27 that has advanced to the H position is pressed to bring the armature 30 into contact with the attraction surface of the actuator 80 again. Intermediate part 68 of the cam slopes 66a, 66b
Is the surface of the selector plate 61. A guide cam 67 is provided below the selector second pressing cam 66, which is higher than the selector plate 61 and lower than the selector lasing cam 71. In this specification, the height of the carriage is high on the side approaching the needle bed and low on the side leaving it.

As shown in FIG. 3, the selector plate 6
Reference numeral 1 projects rearward from the tail of the selector 27, a bracket 90 having an L-shaped cross section is provided here, and a needle selection actuator 80 facing the armature 30 is attached. The actuator 80 is provided with two upper and lower rows of flat attraction surfaces 81a and 81b magnetized by permanent magnets, and a first needle selection portion 82 and a second needle selection portion 83 arranged at appropriate intervals. Needle selection unit 82, 83
Is the magnetic pole pieces 82a, 8 of the electromagnetic coil of the electric release type electromagnet.
2b, 83a, 83b.

The selector positioning guide surface 62 stabilizes the swing position of the selector 27, and the actuator 80
Has the full width of. Here, FIG. 3 shows a case where the bat 32 and the guide surface 62 are virtually deleted. The elastic leg piece 29 pushes the selector butt 34 upward, and the cam 76 pushes the butt 34 into the needle groove to attract the armature 30 to the attraction surface 81. When the guide surface 62 and the butt 32 are provided in FIG. 3, it becomes FIG. In FIG. 3, the selector 27 is pressed by the cam 76, and the tip of the elastic leg piece 29 is used as a fulcrum.
The selector 27 swings counterclockwise. Then, the upper surface of the selector 27 comes into contact with the strip 6 and stops. Therefore, the strip 6 serves as a reference surface that determines the contact between the armature 30 and the attraction surface 81.

However, the band 6 is for preventing the selector 27 from falling out of the needle groove and is not uniform in the entire width of the needle bed because it is long. Further, it is not appropriate to use the strip 6 provided for a long one such as a needle bed as the reference surface. Therefore, the displacement of the selector at the time of pressing cannot be made uniform. If the displacement is large, an angle is generated between the armature 30 and the attracting surface 81, and point contact occurs. Therefore, if there is no large attraction force, the armature 30 will come off the attraction surface 81 and a needle selection error will occur. Therefore, it is necessary to strengthen the permanent magnets and the magnetic poles of the coils to prevent mistakes in needle selection. As a result, the actuator becomes large in size, power consumption increases, and unstable operation occurs due to leakage magnetic flux.

On the other hand, in the needle selecting device of the embodiment, when the butt 34 is pressed, the butt 32 comes into contact with the guide surface 62 of the carriage 40. Therefore, the selector 27 is swung based on the guide surface 62, and the selector is swung under the same condition at any position of the needle bed. When the butt 34 is pressed by the cam 76, the armature 3
Guide surface 6 such that 0 makes surface contact with suction surface 81.
Determine the height of 2. Therefore, in FIG. 5, the attraction force of the actuator 80 can be reduced to 1/2 to 1/5 of that in FIG. 3, and the actuator can be downsized. As a result, the leakage magnetic flux can be reduced and more stable needle selection can be performed.

The operation of the needle selection device will be described with reference to FIGS. 4, 5 and 6. The operation of the needle selection device 100 arranged between the knitting locks will be described by taking the case where the carriage moves to the left as an example. P1, P2, P3 in the figure are bats 34, 3
The loci of 3 and 32 are shown, and P4 shows the locus of the bat 22. Further, in FIG. 4, the actuator 80 is shown by a solid line.

The selector 27 in the state shown in FIG. 1 moves the bat 3 at the position a in the figure as the carriage 40 advances.
2 contacts the guide cam surface 62, and then the butt 32 is positioned on the guide surface 62. The butt 34 is pushed into the needle groove by the cam 76a, and as shown in FIG.
0 comes into contact with the attracting surface 81 and is attracted to the coil pole piece 82.
To the first needle selection unit 82.

At the position of b, the first needle selecting section 82 sorts knitting needles required for knitting and knitting needles not knitting. When the armature 30 of the selector 27 of the knitting needle necessary for knitting reaches the coil magnetic pole piece 82, the coil is energized, the magnetic flux of the permanent magnet is canceled, and the attraction by the coil magnetic pole piece 82 is cut off.
For this reason, the selector 27, which is no longer adsorbed, has elastic leg pieces 2.
9, the selector butt 34 protrudes out of the needle groove and is controlled by the needle raising cam 73. With a knitting needle not required for knitting, even if the selector 27 reaches the coil magnetic pole piece 82, the coil magnetic pole is not energized, and as a result, the selector 27 remains attracted.

At the position c, the butt 34 is guided to the cam inclined surface 73a and advances to the top of the cam with respect to the selector 27, which has been removed from the attraction by the energization of the coil magnetic poles. Therefore, the head 28 of the selector 27 is connected to the select jack 2
Push 0 to the H position. As a result, all the knitting needle select jacks 20 required for knitting are selected at the H position.

At the position d, the butt 34 is pushed into the needle groove by the cam 66a with respect to the selector 27 selected to the H position. The cam 66a is a pressing slope provided on the cam 65, and the cam 65 is above the cam 73a. Therefore, the armature 30 comes into contact with the attracting surface 81 again and moves to the second needle selecting portion 83. Here the guide cam 67a
Prevents the bat 34 from retracting.

At the position of e, the selector 27 is further selected by the second needle selection section 83. That is, as in the case of the first selection, only the selector 27 corresponding to the knitting needle to be selected in the A position is cut off on the coil pole piece 83 by energization. The butt 34 of the selector 27, which has stopped being adsorbed, protrudes out of the needle groove and is guided by the subsequent A position raising cam 74a to advance to the top of the slope. As is clear from the figure, the apex of the cam 74 is ahead of the apex of the cam 73. As a result, select jack 20
Advances to the A position.

At the position of f, the butt 33 of the selector 27 advanced by the cam 71 is the selector lowering cam 63.
Since it retreats at a, it retreats to the initial position.

In this way, each select jack 20
Are sorted into three positions A, H, and B in one stroke of the carriage 40. Subsequent retractable pressers 47, 4
8 and 49 act on the butt 22 and the needle jack 14
The trajectory of the bat 16 is determined. As a result, which trajectory of the knitting lock the needle 13 passes through is determined, and various knitting, tucking, and miss knitting is performed. The symbol Q in FIG.
1 to Q4 are bats 3 when the carriage moves to the right.
4, 33, 32 and 22 are shown. Further, 100 'is a needle selection device at the end of the carriage.

<Modification> FIG. 7 shows a modification of the needle selection device. This modification shows an application of the selector positioning guide, and the reference numerals similar to those in FIGS. 1 to 6 indicate the same. 1
Reference numeral 80 is a needle selection actuator having the same structure as described above, which releases the armature 130 by energization, and 140 is a new carriage, 1
61 is a new selector plate, 101 is a new needle bed, 127 is a new selector, 120 is a new select jack, and 114 is a new needle jack. Also, 108 and 110 are new wires, 106
Is a new band, 122 is a bat of the select jack 120, and 121 is the head of the selector 127. Furthermore, 170 is a new selector raising cam. The selector 127 is fitted with the leaf spring 129 at the fitting portion 135,
The armature 130 is urged in the direction of sinking into the needle groove. 1
Reference numeral 30a denotes an engagement surface with the selector raising cam 170,
130b is an engaging surface with the selector lowering cam. A bat 13 for stabilizing the needle selection is provided on the upper surface of the selector 127.
Form 2 A selector pull-up cam 176 is provided at the lower end of the selector plate 161, and this cam pushes the armature 130 of the selector 127 out of the needle groove against the elastic bias of the leaf spring 129. As a result, the armature 13
0 contacts the suction surface of the actuator 180. The selector 127 swings with the butt 132 of the selector 127 in contact with the guide surface 162. Therefore, the movement of the selector within the needle groove is restricted. Since the selector 127 swings with the guide surface 162 as a reference surface, if the height of the guide surface 162 is determined so that the armature 130 and the actuator 180 are in surface contact, the same effect as in FIGS. 1 to 6 can be obtained. .

<Control of Needle Selection Actuator> Various types of control of the needle selection actuator 80 are already known. What is important in this control is to determine the coil current to the needle selection portions 82 and 83 according to the attraction force of the attraction surface 81. For example, in this regard, JP-A-62-26
Reference numeral 3358 indicates that the Hall element is used to measure the attraction force of the attraction surface 81. The control of the needle selection actuator 80 may follow such a conventional method, but a preferable example is proposed below. In this example, the needle selection data itself is used to determine the coil current to the needle selection units 82 and 83, and a magnetic sensor such as a Hall element is not required. The point of interest here is that the variation of the suction force of the suction surface 81 is determined by the number of selectors 20 that are attracted to the needle selection actuator 80.

FIG. 8 shows a control circuit of the needle selection actuator 80. In the figure, reference numeral 200 denotes a needle selection pattern memory, which stores needle selection data which is a part of knitting data. A coil current determination unit 201 determines a coil current based on the needle selection data. Further, a control unit 202 determines the coil current to the electromagnets of the needle selection units 82 and 83 by the determined coil current. Suppose the carriage 40 goes left. The needle selection data referred to by the control of the needle selection unit 82 is the selector 20 which is adsorbed on the adsorption surface 81 between bc in FIG.
Is the number of. This is based on the number of needles existing between the areas b and c and the number of needles selected to the H position (cam 73a).
The number of selectors affected by) is subtracted. The needle selection data referred to by the control of the needle selection unit 83 is the number of selectors 20 adsorbed from e in FIG. 4 to the right end of the adsorption surface 81. This is obtained by subtracting the number of needles selected to the A position from the number of needles existing in this range.

According to the knowledge of the inventor, when a large number of selectors 20 are sucked, the suction force of the suction surface 81 is reduced. This is because the magnetic flux of the attracting surface 81 is distributed to many selectors 20. Selector 20 adsorbed on adsorption surface 81
The number of lines varies depending on the needle selection pattern. For example, when the total number of needles is in the B position, the maximum number of needles is absorbed,
When all the needles take the A position, they are adsorbed and the number of needles becomes the minimum. Then, the needle selection pattern is known, and the number of selectors 20 adsorbed on the adsorption surface 81 can be obtained from this.

Returning to FIG. 4, the determination of the coil current is shown. The total number of knitting needles within the range of the suction surface 81 is determined by the pitch of the knitting needles and is known. In the range of ab in FIG. 4, all selectors are adsorbed, and the number of selectors there is constant. Similarly, all selectors are adsorbed between the areas c and e,
The selector is pressed by the cam 66a between the regions cd and
Equal to being adsorbed. The number of the adsorbed selectors around the needle selection unit 82 changes as shown in FIG.
Between c, the selector under the action of the cam 73a is not attracted here. Therefore, the total number of selectors that should be in the bc area of FIG. 4 is known from the pitch of the knitting needles, and when the number of selectors selected to the H position and being acted by the cam 73a is subtracted from this, the suction occurs in the bc area. The number of selected selectors is determined.

Similarly, the only selector that is not attracted near the needle selection portion 83 is the selector that is changing to the A position under the influence of the cam 74a. Therefore, the number of selectors that are actually affected by the cam 74a is subtracted from the total number of selectors that should be located up to the right end of the suction surface 81 (known from the needle pitch). In the embodiment, for the sake of convenience, the selector to be actually selected is excluded from the number of selectors. When the carriage 40 moves to the right, c-e in FIG.
Areas on the left side of the space and b are important, and the number of selectors adsorbed in these areas is obtained.

Returning to FIG. 8, the needle pitch and the distribution of the selectors in each part of the actuator 80 are known from the needle selection data. Based on this, for example, the coil current is determined using the following reference table, and the needle selection unit is selected. 82 and 83 are controlled. The upper part of the table is for normal control that changes the coil current for each number of selectors,
The lower part is for simple control.

[0052]

[Table 1]

[0053]

According to the present invention, the carriage and the needle bed can be downsized.

According to the present invention, a plurality of cams having different functions can be integrally formed on the same cam, the number of parts can be reduced, and the assembling work can be facilitated.

In the present invention, the armature can be securely attracted,
As a result, the suction force of the needle selection actuator can be reduced, and at the same time, mistakes in needle selection can be prevented.

According to the present invention, the needle selection actuator can be driven by a drive signal having an appropriate size, and no magnetic sensor is required.

[Brief description of drawings]

FIG. 1 is a sectional view of a needle bed in an example.

FIG. 2 is a diagram showing a cam arrangement of a carriage in the embodiment.

FIG. 3 is a cross-sectional view showing the needle selection device of the embodiment with the selector position stabilizing mechanism removed.

FIG. 4 is an enlarged view showing a part of the cam layout in the needle selecting device of the embodiment, showing the operation at each position of the cam.

FIG. 5 is a diagram showing a state in which the selector is attached to the needle selection actuator by the selector first pressing cam.

FIG. 6 is a view showing a state in which the selector has moved forward by a selector raising cam.

FIG. 7 is a diagram showing a modification for stabilizing the selector.

FIG. 8 is a block diagram showing control of a needle selection actuator in the embodiment.

[Explanation of symbols]

1 Needle Bed 2 Grooves 3 Needle Plate 4 Needle Grooves 5, 6, 7, 106 Bands 9, 10, 11, 110, 129 Wires 13 Knitting Needles 14 Needle Jacks 15 Needle Jack Tips 16 Needle Jack Butts 17 Elastic Legs 20, 120 select jack 22, 24, 122 select jack bat 23 forked portion 25 recessed portion 27, 127 selector 28 selector head portion 29 elastic leg piece 30, 130 armature 32, 33, 34, 132 selector butt 40 carriage 41 cam plate 42 raising cam 46,46 'Knitting lock 44,45,44', 45 'Guide cam 47,48,49,47', 48 ', 49' Select jack presser 61 Selector plate 62 Guide surface 63a, b Selector lowering cam surface 64, 64 'selector guide cam 65, 65' selector guide cam 66a, b selector second pressing cam slope 67a. , B guide cam 70, 70 'selector guide cam 71, 73a, 73b, 74a, 74b, 73b', 7
4b 'Selector Raising cam 76, 76' Selector first pressing cam 80, 80 ', 180 Needle selection actuator 81 Adsorption surface 82, 83 Needle selection unit 90 Bracket 100 Needle selection device 200 Needle selection pattern memory 201 Coil current determination unit 202 Control Department

Claims (10)

[Claims] 1. At least a pair of needle beds and a carriage that reciprocates on the needle beds, each needle bed having a plurality of needle grooves, and a knitting needle, a select jack, and a selector are arranged in each needle groove. In the needle selecting device of the flat knitting machine, the selector has a head portion on the select jack side and a tail portion on the opposite side, and in the vicinity of the head portion of the selector, for restricting the swinging motion of the selector. A swing control means is provided, and a retreat control means for controlling the retreat of the selector from the select jack side is provided in the central portion of the selector, and the forward movement of the selector to the select jack side is controlled near the tail portion of the selector. And a forward control means for controlling the carriage. The carriage is provided with at least two locations near the tail portion of the selector, a first needle selecting portion and a second needle selecting portion. And a first needle selector for contacting the selector with the first needle selector of the needle selector actuator by pressing the needle selector actuator for selectively and magnetically adsorbing and desorbing and the advance control means.
The pressing cam means and the advancement control means are guided to advance the selector attached / detached at the first needle selection section to the select jack side, and the selector advanced by the first raising cam means. A second pressing cam means for abutting the second needle selection portion of the needle selection actuator by pressing the forward movement control means, and a selector attached and detached at the second needle selection portion by guiding the forward movement control means. The second raising cam means for further advancing to the select jack side, and the selector advanced by any of the above-mentioned raising cam means, is retreated to the side opposite to the select jack by guiding the retreat control means. A needle selecting device for a flat knitting machine, which is provided with a retracting cam means for 2. The swing restricting means, the retreat controlling means,
The advancing control means comprises a butt provided on the carriage side of the selector, and the needle selecting actuator adsorbs and desorbs the side opposite to the advancing control means of the selector. Needle device. 3. The selector is provided on the side protruding from the needle groove,
Pressed by the select jack, the select jack is pushed forward by the advance of the selector to the select jack side,
The needle selecting device of the flat knitting machine according to claim 2. 4. The carriage includes a plurality of needle selecting devices, and at least one of the needle selecting devices has a peak-shaped first lasing cam means and a second pressing cam provided near the peak of the first lasing cam means. And a first pressing cam means provided on both sides of the second raising cam means, and a second pressing cam means provided on both sides of the first raising cam means. Knitting machine needle selection device. 5. A needle selecting device for a flat knitting machine according to claim 1, wherein the carriage is provided with a reference surface which is in contact with the swinging restricting means and serves as a swinging reference surface of the selector. . 6. The needle selection device for a flat knitting machine according to claim 5, wherein sloped surfaces are provided on both sides of the reference surface to prevent a collision between the rocking restricting means and the reference surface. 7. A needle bed comprising at least a pair of needle beds and a carriage reciprocating on the needle beds, each needle bed having a plurality of needle grooves, and a knitting needle, a select jack and a selector are arranged in each needle groove. In the needle selecting device of the flat knitting machine described above, the carriage has a needle selecting actuator having an attracting position made of a permanent magnet and a detaching position made of an electromagnet, and sliding and swinging the selector on the select jack. The selector is equipped with an armature to be absorbed and desorbed by the needle selection actuator, and the selector is biased so that the armature moves away from the needle selection actuator. Provided with a protrusion in a protruding direction, the carriage is a reference for surface contact with the protrusion when the armature is attracted to the needle selection actuator. The is characterized by providing, needle selector for knitting machines. 8. The selector has a select jack side as a front end and an opposite side as a rear end, and the projecting portion is arranged near the front end of the selector and the armature is arranged near the rear end. Needle selection device for flat knitting machines. 9. A flat knitting machine in which a selector is selectively sucked and desorbed to select a needle by a needle selection actuator provided with an attracting surface using a magnet and at least two needle selecting portions using an electromagnet. The needle selection device is provided with a memory for storing needle selection data of a knitting knitting machine, and means for determining and driving the magnitude of the electromagnet drive signal based on the stored needle selection data. A needle selection device for a flat knitting machine. 10. The needle selecting device is further provided with first peaking lasing cam means, second pressing cam means provided near the peak of the first lasing cam means, and both sides of the first lasing cam means. Second raising cam means and second
First pressing cam means provided on both sides of the lasing cam means, and the drive signal determining means is based on the number of selectors under the control of the first lasing cam means 10. The needle selecting device for the flat knitting machine according to claim 9, wherein the drive signal for the second needle selecting section is determined based on the number of selectors under the control of the second lasing cam means. .