JPS6026858B2 - Loop restraint device for knitting machine - Google Patents

Description

[Detailed description of the invention] The present invention relates to a loop restraining device suitable for knitting machines.

More specifically, it is a straight V-shaped bed type knitting machine,
at least two sets of latch needles capable of regular movement diagonally across each other between raised and lowered positions by the action of the cam block as the carriage carrying the cam block moves back and forth across the bed of the knitting machine; This invention relates to a loop suppressing device that is attached to a knitting machine and used.
In the normal operation of the knitting machine, a loop of cotton yarn slides down a raised needle in preparation for closing the latch on retraction, when the loop passes over the latch and slides down the raised needle. (shank) must be shaped so that it can slide upwards. A conventional method for achieving this purpose is to add weight to the edges of the formed stripes, which pulls the green space downwards and thus engages it as each loop is formed. The needle is then pulled down the shank and past the latch towards the needle.

For reliable knitting, a set of needles is held stationary and motionless by striped loops on the needles;
Meanwhile, the other set of needles, ie the working needles, need to continue knitting. In this case, the tension required to pull the loop on the working needle down below the rut of the needle cannot be obtained by adding weight to the stripe, because the pulling force due to the weight is This is because the loops on the stationary needles located below the bran are retained by the loops on the stationary needles rather than the loops on the middle needles, so that even though the loops on the working needles are formed, they cannot be lowered past the latches of the working needles. The various mechanisms used to move the loops on the working needles all utilize built-in loop restraint elements, sometimes referred to as presser feet. A device that is pushed into a groove of a joining line formed by the intersection line of the knitted fabric layer knitted by the working needle and the knitted fabric layer held on the stationary needle is used. One known construction incorporates a swinging arm that engages the groove at its lower end, requiring some form of longitudinal movement. The reason for this is that the loop suppressing element needs to be located at a distance from and in front of the point where knitting is actually performed, and furthermore, because knitting is performed in both directions in which the carriage of the knitting machine moves. This is because when the knitting direction is reversed across the knitting section, the loop restraining element always needs to be in front of the knitting point.

The swinging arm performs this action, but it has the disadvantage that the position at which the groove should come into contact with a portion of the arm changes depending on the magnitude of the swinging angle; This has the disadvantage that the longitudinal position of the part of the arm in contact with the groove, ie the distance from the knitting point, changes.

Still other configurations have two needle rows spaced apart along the length of the needle row.
two loop restraining elements can be engaged alternately with a portion of the groove in front of the knitting point in each direction of movement of the carriage, and each of the loop restraining elements can be operated alternately as the carriage moves back and forth. .

A great advantage is thus obtained by eliminating all oscillation of the loop restraining element and by making it easier to set it in its best operating position.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a loop restraint device which is easy to set to engage and install the loop on the working needle in the best selected position and which operates by a simple linear motion. It is.

The loop restraining device according to the invention is attachable to a cam-carrying carriage of a knitting machine, and when the device is attached to said carriage, at least one bar is attached to said carriage transversely to the direction of movement of said carriage. incorporating a carrier member supported for reciprocating movement within the carriage, the bar having at one end a loop restraining element projecting laterally from the bar;
means for reciprocating the bar in the carrier member at each end of the cradling stroke of the carriage between a position in which it engages a bar and a retracted and inactive position; The device carries means for rotating the bar at an angle of 180 degrees when entering the bar, and the means for rotating the bar is arranged so that the bar is rotated rearwardly with respect to the direction of movement of the cradling stroke that the carriage is about to start. The bar is arranged so as to rotate to a position where the loop suppressing element protrudes.

If the carrier member incorporates a single bar and a loop restraint element, the carriage is moved by an installation odor that causes the carriage member to slide relative to the carriage in the same direction as the carriage moves along the needle bed. It may also be possible to attach it to the

This causes the loop restraining element to be moved to a forward position for each cradling stroke of the carriage along the needle bed. The bar may also have a rectangular cross-section, in particular an oblong cross-section, and its thickness is sufficient to allow the bar to pass through the groove between the needles of the two needle beds.

Furthermore, the carrier member supports a cam mechanism which is engageable with a suitable fixture of the knitting machine when in position on the carriage, the cam being at opposite ends of the travel of the carriage. In devices incorporating a single loop restraint element, the carrier member is slid within the carriage as described above, although actuation may cause the bar to reciprocate and rotate. The cam mechanism also includes a cam plate that is movable within the carrier member, the cam plate having a cam surface that is engageable with the bar, and a cam plate that allows the bar to move substantially at the end of its reciprocating stroke. A pinion of the bar and an engageable rack may be disengaged when the cam plate is in the position, so that sliding movement of the cam plate causes the bar to reciprocate and rotate.

Alternatively, the cam plate may carry only one cam surface and the carrier member may carry a helical cam element formed by a helical cam surface engageable by a cam follower, in which case the A cam follower projects laterally of the bar to engage the helical cam surface as the bar approaches its retracted position during reciprocating motion. Furthermore, the loop restraint element may be a long spring wire attached to a suitable end of the bar and projecting from the side of the bar. The means for rotating the bar is such that when attaching the carrier member to the carriage, the loop restraining element rotates as the carriage moves from one direction to the other.
It is usually set so that it always protrudes in the downward direction.

The cam mechanism may also be arranged to press the bar to move in one direction, in which case a spring is provided to move the bar in the other direction.

Further, the carrier member may support two bars spaced longitudinally relative to the carriage;
In this case, it is preferable that these two bars operate in synchronization with each other and in conjunction with a similar cam mechanism so that both bars reciprocate in unison. Each may be provided with a helical cam member,
In this structure, the carrier member is fixed to the carriage, and the bars are located on opposite sides of the knitting point.

Next, a specific example of the loop suppressing device of the present invention incorporating two loop suppressing elements will be explained with reference to the accompanying drawings.

1 in the drawing is a carrier member that can be attached to a carriage (not shown) that supports a cam of a knitting machine.

That is, the carriage supports the cam which moves along the bed of the knitting machine, in other words the cam which successively operates two rows of needles arranged in a V-shape and forming a needle bed. The carrier member 1 supports a block 2 which is slidable along two guide pins 3 in a direction transverse to the direction of movement of the carrier member 1 along the needle bed.

Furthermore, this block 2 has two sleeves 4 inside it.
and a bar 5 inside each of the sleeves.
is provided, and a loop restraint element is attached to the lower end of the bar. Each of the bars 5 is slidable within the sleeve 4 but not axially movable with respect to the sleeve 4 and has a pin 8 screwed into the block 2 and a pin 9 attached to the sleeve 4. A spring 7 connecting between the two presses the sleeve 4 so that it moves downward within the block 2 toward the extended position as shown. Further, the block 2 supports a cam follower 10, and the cam follower 10' engages with a cam groove 11 formed in a cam plate 12 attached to the carrier member 1,
The cam follower 1 is slidable through the carrier member 1 parallel to the direction of movement of the carrier member along the needle bed, and further includes an elongated hole in the plate 14 for fixing the cam follower 1 to the carrier member 1. 13. This elongated hole 13 is formed parallel to the guide pin 3, and a transverse pin 15 mounted on the top of each of the bars 5 is arranged so that when the bar 5 is moved to its retracted position, the It is engageable with a helical cam surface 16 of a helical cam member 17 mounted on the top of the carrier member 1 .
Furthermore, in the figure, reference numeral 18 indicates latch needles that are arranged diagonally with each other to form the needle bed. Thus, when operating a knitting machine equipped with the device as shown, as the carriage moves in one direction along the needle bed, the cam successively moves a set of needles, which may be referred to as working needles. the needles of the other set remain stationary, the stationary needles retaining the loops previously formed during the cradling stroke of the carriage when it was the working needle; If the carriage moves to the right in the drawing, the cam plate 12 is in the position shown in FIG. in the extended position shown in engagement with said loop restraining elements 6 which are pushed into the angle), one of said elements 6 being disposed in front of the knitting point and one behind it. , the loop on the stationary needle will be suppressed.

Also, as the carriage moves and the cam raises and lowers the working needle, it can engage a latch on the needle.

When the carriage approaches one end of the needle bed, the cam plate 12 supported by the carrier member 1 comes into contact with a support stand (not shown) at the end of the needle bed and cannot move any further. During the subsequent movement of the carriage towards the end of the needle bed, the cam plate 12 assumes a position protruding from the left side of the carrier member.
When the cam plate 12 moves to the left relative to the carrier member 1, the cam hole 11 guides the cam follower 10 to rise and reach the top of the cam hole. 2 is the guide pin 3
along the sleeve 4 and the bar 5 held therein towards the top of the retracting carrier member 1, and thus the loop restraining element 6 rises and closes the two needles 18. When the block 2 approaches the top of its movement, the pin 15 supported by the bar 5 moves away from the helical cam surface 1.
6 and continued upward movement of the block 2 causes the helical cam surface 16 to rotate the pin 15, thus causing the bar 5 to rotate 180° within the sleeve 4 and the loop restraining element 6 to rotate. This time, make it protrude toward the right side.

Further, when the cam follower 10 passes the apex of the cam hole 11, the block 2 is moved by the force of the spring 7.
It moves again to its lowest point, and this downward movement continues until the loop restraining element 6 is fully stretched again and fits within the corner between the needles 18. The carriage is then ready to begin movement in the opposite direction along the needle bed, and the cam plate 12 now projects from the new leading end of the carrier member so that the cam plate 12 When the edge of the floor is reached, arrangements are made to raise the loop restraint element and cause it to project to the left again. Then, if only a single loop restraint element is incorporated, thus forming a device having only one reciprocating motion, the carrier member is attached to and movable relative to the carriage; The operation of retracting and rotating the loop restraint element is performed exactly as described above for the carrier member incorporating the two loop restraint elements described above, but
In this case, as the carriage reaches each end of the needle bed, the carrier member moves along the carriage to transfer the single loop restraint element from one side of the needle actuating cam to the other. It is sufficient that the single loop restraining element is always located in front of the knitting point each time it moves along the needle bed.

[Brief explanation of drawings]

The drawings show specific examples of the present invention, and FIG. 1 is a cross-sectional side view of the device according to the present invention, and FIG. 2 is a cross-sectional side view of the device according to the present invention.
FIG. 1...Carrier member, 2...Flotsk, 3...
Guide pin, 4...Sleeve, 5...Bar, 12...Cam plate, 16...
Spiral cam surface, 17... Spiral cam member, 18.
...Latch needle. FIG. 2. ○

Claims (1)

[Scope of Claims] 1. At least one loop retainer having a carrier member attachable to a movable carriage carrying a cam of a knitting machine and arranged to project rearward with respect to the moving direction of the carriage. a loop restraint device for supporting an element, the loop restraint element projecting laterally from one end of a bar, the bar being positioned within the carrier member in a direction transverse to the direction of movement of the carriage; reciprocating motion, and the bar reciprocates within the carrier member between an extended loop engagement position at the end of each cradling stroke of the carriage and a retracted non-active position. and while the bar is retracting, the bar is 180
It is characterized in that it is rotatable by means for rotating the rod, so that the bar is moved to the position and the loop restraining element is moved to a position protruding rearward with respect to the direction in which the carriage is to be moved. A loop restraint device for knitting machines. 2. In the loop suppressing device according to claim 1,
Said carrier member supports a cam mechanism which, when said carrier member is attached to said carriage of a knitting machine, is engageable with a suitable particular portion of said knitting machine when said carriage is at the opposite end of its travel. Then,
A loop restraining device for a knitting machine, wherein the loop restraining device operates to cause the bar to reciprocate and rotate. 3. The loop restraint device according to claim 2, wherein the cam mechanism includes a cam plate that is slidable within the carrier member and provides a cam surface that is engageable with the bar. , and the carrier member carries a helical cam element formed by a helical cam surface, the helical cam surface projecting laterally from the bar and causing the bar to be in the retracted position during its reciprocating movement. A loop restraining device for a knitting machine, characterized in that it is engageable with a cam follower that engages with the helical cam surface when approached. 4. In the loop restraining device having two loop restraining elements according to claim 2, the carrier member supports two bars having a longitudinal spacing with respect to the carriage, and each bar has a each supporting a loop restraining element; furthermore, the two bars are synchronously interlocked with the cam mechanism such that the bars reciprocate in unison; A loop restraining device for a knitting machine, comprising a cam follower that can engage with a helical cam member when the bar is retracted, and the helical cam member operates to rotate the bar by 180°. 5 In the loop suppressing device described in claim 4,
Said carrier member supports a block guided for movement in a direction transverse to the direction of movement of said carriage, said block having two parallel sleeves slidable therein and guided for movement in a direction transverse to said direction of movement of said carriage. each sleeve rotatably supports a bar supporting a loop restraining element therein; a cam follower engageable with a cam surface formed in a cam plate slidable within the carrier member, the cam follower being engageable with a cam surface formed in a cam plate slidable within the carrier member; A cam plate is configured to move the movable block transversely to the direction of movement of the carriage, thereby moving the bar from an extended position to a retracted position and back to the extended position. , and each of said bars has a laterally projecting cam that engages a helical cam surface of a helical cam element supported by said carrier member when said respective bar is moved to said retracted inoperative position. 1. A loop restrainer for a knitting machine, each carrying a slave member, and further comprising a bar within said sleeve that rotates through an angle of 180° due to the action of said helical cam element.