JPH0143054B2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an electromagnetic needle selection device for stockinette knitting machines, particularly flat knitting machines.

[Conventional technology]

A needle selection device that selects needles to be activated for knitting a knitted fabric uses an electromagnet, and when the electromagnet and a select jack etc. linked to the needle to be selected face each other, the electromagnet is energized and the select jack etc. There is known a device that sucks these into a position where they come into contact with a cam that displaces them (Japanese Patent Laid-Open No. 12887/1987). In this device, a pair of electromagnets for needle selection are placed opposite each other, a passage is formed between them, a selector is passed through the passage, and one of the electromagnets is operated during that time to attract the selector to the electromagnet. However, the position of the selector is not constant when passing through the passage, and the moving distance of the sucked selector is indeterminate, making the selection operation unstable.

[Problems to be solved by the invention]

In view of the above points, the present invention provides accuracy of selection by allowing members to be selected, such as a selector, which have advanced to a position facing an electromagnet in electromagnetic needle selection, to be selected in an asymmetric state at the time of selection. lowers the
Furthermore, it is an object of the present invention to eliminate problems such as increasing the time required for selection, and to enable highly accurate selection to be performed in a short time.

[Means to solve the problem]

A thin plate-shaped selection jack 41 is swingably supported on the support jack 38 by a support member 42.
The selector is supported on a carriage so that the suction selection surface 30 of the selector 1 slides onto the upper edge of the selector, and the suction selection surface of the selector includes a suction selection surface that is perpendicular to the direction of movement of the carriage and that protrudes from the suction selection surface. A jack attitude correction edge A extending in the same direction as the select jack is provided, and a jack fulcrum edge B similar to the jack attitude correction edge is provided on the suction select surface at a position that substantially divides the same surface into four parts along with the jack attitude correction edge. The suction selection surface is provided protrudingly, and is inclined so that the jack posture correction edge and the jack fulcrum edge are the highest, and becomes lower as it gets further away from the jack posture correction edge, and is on the jack posture correction edge,
Electromagnetic poles were provided on both sides of the jack fulcrum edge, and permanent magnet poles were provided on both sides of the poles in the direction of the jack fulcrum edge.

[Effect]

The suction select surface of the selector supported by the carriage during knitting is brought into sliding contact with the upper edge of a plurality of thin plate-shaped select jacks inserted into the needle grooves while being swingably supported by a support member. A jack attitude correction edge provided on the selection surface in a direction perpendicular to the traveling direction of the carriage and protruding from the suction selection surface in the same direction as the selection jack makes the attitude of all the jacks the same and allows the selection When a predetermined select jack is opposed to the jack attitude correction edge of the suction select surface, a pair of electromagnets provided on the jack attitude correction edge are energized, so that one electromagnet is placed on the upper edge of the select jack. A state in which the select jack is supported on its support according to the inclination of the suction select surface, with the upper edge of the select jack being suctioned to one half of the suction select surface as the carriage continues to advance. Tilt it as it is and separate it from the other select jacks.

【Example】

The electromagnetic needle selection device 1 of the present invention has a needle bed 2.
It is attached to the base plate 3 of a carriage that reciprocates above the carriage, and has electromagnets 4a, 4b, 4c, 4d and permanent magnets 5a, 5b, 5c, 5d. Since the electromagnets 4a, 4b, 4c, and 4d have the same shape, the structure of the electromagnet 4d will be explained. 6
is pure iron for the magnetic pole, and has a thin protruding base end, non-magnetic liners 71a and 72a on both sides, and an L-shaped hard soft iron 81a with the tip close to the pure iron 6 side for the magnetic pole. , 82a are arranged side by side, and a groove 9 is formed in a straight line through the pure iron non-magnetic liners 71a, 72a for magnetic poles and the L-shaped hard soft iron 81a, 82a.
A positioning pin 10 is inserted inside to prevent each from moving freely. Pure iron for magnetic poles 6a, non-magnetic liners 71a, 72 arranged in series as described above
a, spacers 11, 12, 1 made of a wear-resistant non-magnetic hard material using a plurality of pieces of hard soft iron 81a and 82a;
3 and side plates 14 and 15 in the shape of a sandwich, pins 16 are inserted into these at three locations, and both sides are fixed with nuts 17 to make them integral. Since the spacers 11, 12, 13 will sandwich the bases of the L-shaped hard and soft irons 81 and 82, the adjacent L-shaped hard and soft irons 81a, 81b, 81c,
A gap is created between 81d and between the upper portions of 82a, 82b, 82c, and 82d. Permanent magnet 51 in this part
Insert a, 51b, 52a, 52b. However, between L-shaped hard soft iron 81b and 81c and 82
Do not insert it between b and 82c. The poles of the magnet are inserted so that the N pole is located on the outside and the S pole is located on the inside.
d, 82a, 82d are N poles, same as 81b, 81
c, 82b, 82c become S poles, L-shaped hard soft iron 81a and 81b, 81c and 81d, 82a
A magnetic field is created between and 82b, 82c and 82d, and there are two blocks of attraction surfaces (magnetic circuits) on the right and left of the center in FIG. That is, the electromagnetic selector 1 has four circuits (attraction surfaces) made of permanent magnets. The lower edge of the L-shaped hard soft iron has a beak-like volume that becomes smaller as the tip approaches the center, so that magnetic flux gathers at the tip to increase the attraction force. Pure iron 6 for magnetic poles of electromagnets 4a, 4b, 4c, 4d
A joint piece 20 made of pure iron is fitted to the top of a, 6b, 6c, and 6d, and the pure iron 6 for the magnetic pole is fitted with a screw 21.
a and 6b and 6c and 6d are integrated, and the electromagnet 4
A and 4b and 4c and 4d are connected at the top to form a horseshoe shape. Two blocks of this horseshoe shape will be made. A coil 22 is wound around each of the magnetic pole pure irons 6a, 6b, 6c, and 6d, and the lower ends of the two horseshoe-shaped magnetic pole pure irons can be turned into electromagnets by energizing the coils 22. Its polarity is
The coils are wound so that the magnetic poles are the same as those of the permanent magnets 5a, 5b, 5c, and 5d, with the outside being the north pole and the inside being the south pole. Pure iron for magnetic poles 6a, 6b, 6c,
The tip shape of 6d is also L-shaped hard soft iron 81a, 82a
Similar to the above, the tip is tapered to increase the magnetic flux density. The tips of the pure iron for magnetic poles 6a to 6d are connected to L-shaped hard soft iron 81a to 81d, 82a to 8 through nonmagnetic liners 71a to 71d, 72a to 72d.
It is adjacent to the tip of 2d. The distance between them depends on the thickness of the nonmagnetic liners 71a to 71d and 72a to 72d, but is extremely small. The adsorption selection surface 30 of the selector 1 has its central vertical and horizontal lines A and B (Fig. 4) (hereinafter, line A is referred to as posture correction edges A and B as fulcrum edges) protruding most, and is loosely drawn in the direction of the arrow. It is sloping. This is to ensure good suction by the select jack 41, which will be described later. In FIG. 1, a jack 36, a positioning jack 37, and a support jack 38 are inserted into the needle groove 35 of the needle bed 2. Reference numeral 39 denotes a positioning pin that holds the position of the positioning jack 37. Reference numeral 40 designates a select groove plate, and a select jack groove is formed between the groove plates 40, and a select jack 41 is inserted into the groove. select jack 41
The center thereof is loosely fitted into a support member 42 consisting of a protrusion of the support jack 38. Support jack 38
The fitting portion of the select jack 41 has a gap that allows some vertical movement (0.2 to 0.3 mm), and the support jack 38 is pushed upward from the bottom by the spring pressure of the positioning jack 37. 42 is a timing select sensor groove plate for energizing the electromagnets 6a, 6b, 6c, and 6d of the selector 1. The suction select surface 30 of the selector 1 is placed on the center line of the fitting portion of the select jack 41.
The selector 1 is arranged on the needle bed 2 so that the center line B in the traveling direction is located. As mentioned above, the selector 1 is fixed to the main plate 3, and its fixing structure is as follows (FIG. 2). The selector 1 has a screw 53 mounted on a selector mounting base 52 which is assembled into a parallel cross with a guide bar 51 interposed therebetween.
Fixed by The selector mounting base 52 is fixed to the base plate 3 by mounting screws 54. Then, the scooping cams 55 and 56 are fixed to the sides of the suction selection surface 30 of the selector 1 on the bottom surface of the main plate 3 using the screws 5.
Fix by 7. The selector 1 of the present invention reciprocates on the needle bed 2 as the carriage (not shown) advances, but when the selector jack 41 corresponding to the needle (not shown) to be selected faces the selector 1, The scooping cam 5 is activated by energizing the electromagnets 6a, 6b or 6c, 6d and attracting the selection jack 41 to the attraction selection surface 30 of the selector 1.
6, 57 to move the select jack 41,
Due to this movement, the needle also moves and needle selection is performed. More specifically, in FIG. 9, it is assumed that the selector 1 is moving to the left together with the carriage (not shown). Among the selector jacks 41 on the leading side of the selector 1, those in range A are raised or lowered at their ends in the same state as when the previous course was formed.
The end portion is pushed down by the slope 55a of the scooping cam 55. Scoop up the end and place the end in contact with the lower surface 55b of the cam 55 or the opposite end with the permanent magnet 51.
a, 52a, travels through the section B in FIG. 9, and reaches near the center C of the selector 1. At the center C, the suction selection surface 30 of the selector 1
Since the center line A is the highest and horizontal, the select jack 41 attracted by the permanent magnets 51a and 52a is in a horizontal state. Before the select jack 41 passes this center line A, that is, when the select jack advances to a position 1/2 pitch in front of the parallel select jacks 41, a needle pitch sensor (not shown) Based on the signal detection by the electromagnets 4a, 4
energize b, 4c, and 4d. Electromagnet 4c,
4d is energized when the needle is brought to the working position.
At this time, in the clockwise direction in FIG. 1, when the electromagnets 4a and 4b are energized, the hands remain in the inactive position, and at this time, the select jack 41 swings counterclockwise. be attracted. The above-mentioned energization time is from 1/2 pitch before the select jack to 1/2 pitch after the selector jack with reference to the center line of the selector 1. The select jack 41 attracted by the electromagnet slides on the attracting select surface with its upper edge in contact with the attracting select surface 30, but even after the energization is cut off, the permanent magnet 51a retains the state of being attracted when the power is energized. Keep it and proceed. Then, the selected select jack 41 scoops the end of the cam surface 56a of the cam 56.
The support jack 38, positioning jack 37,
A needle (not shown) is pushed out through the jack 36.

【Effect of the invention】

In the selector of the present invention, the selector is mounted on a carriage so that the suction select surface 30 of the selector 1 slides onto the upper edge of a thin plate-shaped select jack 41 that is swingably supported on a support jack 38 by a support member 42. The selector is supported on the suction select surface of the selector, and has a jack posture correction edge A that is perpendicular to the carriage traveling direction, protrudes from the suction select surface, and extends in the same direction as the select jack.
A jack fulcrum edge B similar to the jack attitude correction edge is protrudingly provided on the suction selection surface at a position that substantially divides the same surface into four parts together with the jack attitude correction edge, and the suction selection surface The jack fulcrum edge is set at the highest point, and the further away from it, the lower it becomes. Electromagnetic poles are provided on the jack posture correction edge and on both sides of the jack fulcrum edge, and Since poles of permanent magnets are provided on both sides of the jack fulcrum edge, all the select jacks inserted into the needle bed as described above are attached to the attitude correction edge A at the center of the suction select surface on the bottom surface of the selector. By energizing the electromagnets that also constitute the suction selection surface, the selection jack to be selected is swung to one side using the fulcrum edge B of the suction selection surface as a fulcrum. During this selection operation, the selection jack always touches the selection surface of the selector with all or part of its upper edge.
The selection operation can be performed accurately and instantaneously.

[Brief explanation of drawings]

Figure 1 is a partially vertical side view of the needle bed and selector, Figure 2 is a plan view of the selector, Figure 3 is a front view of the same, Figure 4 is the bottom surface of the selector and scooping cam with the selector mounting base removed. Figure 5 is a sectional view taken along line C--C in Figure 3, Figure 6 is a sectional view taken along line D-D in Figure 3, Figure 7 is a sectional view taken along line EE-6 in Figure 6, and Figure 8 is a sectional view taken along line 6 in Figure 3. FIG. 9 is a cross-sectional view taken along the line FF and FIG. 9 is a front view showing the relationship between the selector and the selection jack. 1...Selector, 30...Adsorption selection surface,
38... Support jack, 41... Select jack, 42... Support member, A... Jack posture correction edge, B... Jack fulcrum edge.

Claims (1)

[Claims] 1. The upper edge of the thin plate-shaped select jack, which is swingably supported on the support jack by the support member,
The selector is supported on a carriage so that the suction select surface of the selector slides into contact with the selector. A jack posture correction edge extending from the front is provided, and a jack fulcrum edge similar to the jack posture correction edge is protrudingly provided on the suction selection surface at a position that substantially divides the same surface into four parts along with the jack posture correction edge, and the suction selection surface is The jack attitude correction edge and the jack fulcrum edge are set at the highest level, and the angles are made lower as the distance increases. The electromagnetic selector further comprises permanent magnet poles on both outer sides of the poles in the direction of the jack fulcrum edge.