JPS6250590B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a single needle selection device for a knitting machine. In the known single needle selection device for flat knitting machines, two mutually complementary magnets are each provided on a movable cam carriage to control each auxiliary push rod;
Devices are known in which the magnet is an actuating magnet and is configured to release an auxiliary push rod by tilting an actuating lever that is fixed at one end and normally locks the auxiliary push rod. In this case, the lever, which locks the predetermined auxiliary push rod, is tilted by the force of the spring from a non-actuated position to an operative position in which the auxiliary push rod is released, against this spring force. Therefore, this type of magnet that performs mechanical work such as lifting or pressing must have a certain minimum efficiency, and accordingly requires considerable strength and size, and the space required is also limited by the current. Consumption is also large. These magnets are also relatively slow to act because they must overcome not only the inertia of the fixed lever but also the force of the return spring.

It is therefore an object of the present invention to provide a selection device which requires fewer, weaker and smaller magnets, which reduces the space requirements and the current consumption required for operation, and which also requires a higher The goal is to achieve operating speed.

This objective is suitably and advantageously achieved by embodiments of the invention. That is, the electromagnet as the control means is constructed as a simple holding electromagnet and does not require mechanical operation, so it is small and requires less space and power consumption. According to an embodiment of the invention, the mechanical movements for selecting the needle and activating the auxiliary pressure rod are instead carried out by the carriage during its passage. That is, the cam moves all the auxiliary pressure rods one after another into their inactive position, which, if the actuating magnet is not energized, are either locked by the engaging pawls pressed by the spring force or If the actuating magnet is energized and the engaging pawl is locked, it will return to its original position after the carriage passes due to the pressing force of the spring. In its original position, the needle-pressing rod foot is guided into the carriage track to actuate the selected needle.

By using a tilting lever that operates essentially without inertia in the design of the engaging pawl as described in the dependent claims, the device according to the invention achieves high knitting speeds,
Therefore, higher productivity can be achieved with a more reliable operating method with fewer failures. Furthermore, as described in claim 4, the operation of a part of the pressing rod can be easily stopped.

An embodiment of the selection device of the present invention will be described below with reference to the drawings.

FIG. 1 shows a flat knitting machine having two needle beds 1 and two auxiliary needle beds fixed perpendicularly thereto. Two rails are fixed on the needle bed, on which a carriage provided with a cam plate 5 slides, and in this embodiment, three selection heads are fixed on the rails. There is.

A needle 7 is installed in the needle bed, and attached thereto is a pressure rod 8 having a foot portion 9, which is actuated via a cam carriage. An auxiliary pressure rod having two legs 11 and 12 is also attached to the auxiliary needle bed 2. Pressing rod 8
The rear end portion of the auxiliary pressing rod 10 engages with a fork-shaped groove 13 formed therein. The cam plate has a cam 14 cooperating with the pressure rod 8 and cams 15, 16 cooperating with the foot 12 of the auxiliary pressure rod. These push rods each form a pair, within each of which the selection feet 11 are longitudinally offset relative to each other.

Each selection head 6 has eight engaging claws 17 arranged one above the other in the longitudinal plane, adapted to respectively cooperate with the eight selection feet of each group of the auxiliary pressure rods 10. There is. The foot portion 17 is constituted by a link device which can be moved in the axial direction by pressing a return spring 18, and these engaging pawls drive levers 20 made of ferromagnetic material through the slits 19, respectively. The lever 20 is pivoted about a shaft 21, and the other arm can cooperate with a holding electromagnet 22. The spring 18 is therefore also intended to move the lever 20 away from the core of the electromagnet when the electromagnet 22 is not energized. Each auxiliary pressure rod 10 has a compression spring 2
3, said spring, in its rest position, causes the auxiliary pressure rod to rest against the wire 25 extending over the length of the needle bed 2 via the selection foot 11. The second wire 26 is similar to the wire 25 and anchors the auxiliary pressing rod inside the needle bed 2.

The apparatus configured as described above operates as follows.

The carriage 4 has its cam plate 5 and needle selection head 6.
It also moves on the needle beds 1 and 2. Therefore,
All of the auxiliary pressing rods 10 are pressed downward one after another by the cam portions 15 by contacting the foot portions 12 thereof. In this case, the engaging pawl 17 moves outwards against the action of the spring 18 and one arm of the tilting lever 20 pivots against the holding magnet 22.

When the electromagnet is now energized, the engaging pawl is locked in its outermost operating position, while after passing through the cam part 15 the auxiliary pressure rod 10 is once again slid upwardly by the spring 23. The needle pressing rod 8 then rises, and its leg 9 reaches the vicinity of the cam portion 14, is engaged by the cam portion, and moves forward. The needle 7 then moves further to the vicinity of the next knitting cam section.

On the other hand, if no current flows through the magnet, the engaging claw returns inward due to the action of the spring 18, and the selection leg 11
The auxiliary pressure rod is locked in its lower operating position by abutting the auxiliary pressure rod. The needle foot thus remains in an operating position outside the operating range of the modified cam section, and the respective needle is therefore not actuated.

The cam portion 16 is used to sufficiently separate the two operating positions.

If the needle distribution is dense, it is also possible to arrange the magnets one above the other in the longitudinal plane (Fig. 3) and to stagger the selection feet 11 on the individual auxiliary pressure rods 10 at different heights. good. Although FIG. 3 only shows the front auxiliary pressure rod 10, the other auxiliary pressure rods are arranged behind said pressure rod in the figure, except that their selection feet are arranged at various heights. are different. Even when the needle distribution is dense, this method has the advantage that a plurality of push rods and needle units together with their control units can be accommodated in a small space.

Further, according to the configuration of the present invention, the operation of some needle pressing rods can be easily stopped.
For this purpose, each needle pressure rod 8 (FIG. 3) is pressed downwards, that is, pulled backwards in FIG. Engage on the side. If you do this,
The auxiliary pressing rod 10 can be placed outside the operating range of the cam portion 15 and the engaging claw 17.

[Brief explanation of the drawing]

Figure 1 is a front view as seen from the direction of movement of the carriage, Figure 2 is a side view perpendicular to the direction of carriage movement, Figure 3 is a partially cutaway sectional view of Figure 1, and Figure 4 is assistance by the carriage. A schematic diagram showing the operation of the pressing rod; FIG. 5 is a cross-sectional view of the engaging claw shown in FIG. 3;
FIG. 6 is a schematic diagram of a cam section for selecting a pressing rod. Explanation of symbols of main parts, 1, 2...needle bed, 4...
...Carriage, 5...Cam plate, 8...Needle pressing rod,
10...Auxiliary pressing rod, 15...Cam section, 17...
Engagement claw, 20...Tilt lever, 22...Control magnet.

Claims (1)

[Scope of Claims] 1. The carriage moves back and forth on the needle bed together with the cam plate and the selection head, and a plurality of auxiliary pressing rods provided on the needle bed are activated by a plurality of electromagnets provided on the selection head. The single needle for a knitting machine is operated under control, and the auxiliary pressing rod is configured to lift the needle pressing rod when a needle is selected and press the foot of the needle pressing rod onto the movement trajectory of the cam. In the selection device, the auxiliary pressure rods 10 extend perpendicularly to the moving direction of the carriage 4 on the needle bed and are arranged parallel to each other, and each of the auxiliary pressure rods 10 has an arrangement in which adjacent ones are staggered. said selection head is provided with a selection foot 11 disposed such that the selection foot 11 becomes symmetrical and projects outwardly;
A plurality of engaging claws 17 are provided, which are arranged in parallel on a straight line perpendicular to the moving direction of the carriage 4 and each extending parallel to the moving direction, so as to cooperate with the moving direction of the carriage 4, and The counterclaw 17 cooperates with the auxiliary pressing rod 10, and when the electromagnet 22 is de-energized, the return spring 18
In the operating position where the engaging pawl 17 is pushed out by The foot portion 9 of the needle pressing rod is maintained outside the movement trajectory of the cam 14, while the foot portion 9 of the needle pressing rod is displaced in the pushing direction by the auxiliary pressing rod 10 against the force of the spring 23. When the electromagnet 22 is energized in the other operating position shown in FIG.
0 is lifted again by the force of the spring 23 and, after the passage of the carriage 4, moves the foot 9 of the needle-pressing rod into the movement path of the cam, thereby activating the selected needle 7. Features a single needle selection device. 2. A tilting lever 20 pivotally connected to each engaging pawl 17 is arranged, one arm of the lever is kept stationary by the electromagnet when the electromagnet 22 is energized, and the other arm of the tilting lever 20 is engaged. The engaging pawl 17 is radially engaged with a slot 19 formed on the rod of the pawl 17 to prevent the engaging pawl from moving in the axial direction, while when the electromagnet 22 is de-energized, the spring 18 2. Device according to claim 1, characterized in that the auxiliary pressure rod (10) is locked by allowing an axial movement of the auxiliary pressure rod (10). 3. The needle pressing rods 8 and their respective auxiliary pressing rods 10 are actuated by stretching the wires 24 at right angles over all the needle pressing rods 8 and engaging the foot portions 9 of the needle pressing rods 8 with the lower portions of the wires. The device according to claim 1 or 2, characterized in that the device is configured to stop.