JPS5847500B2 - Electromagnetic needle selection device for hand knitting machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic control means for a needle selection device in a hand knitting machine.

Conventionally, the technology known up to now as a technique for selectively controlling the needle selection plate of a knitting machine using an electromagnet as an electric control means in response to a needle selection pattern signal via a punch card, etc. In order to control the selected needle selector plate to its operating position, the control element was activated by the attraction force of an electromagnet, which caused a harsh impact sound when the electromagnet was activated, and it was difficult to obtain the necessary attraction force. This requires an electromagnet with a considerable capacity, which means that the device is large and heavy, consumes considerable power and generates heat, and has poor responsiveness from the timing of the electrical signal given to the electromagnet to the control of the needle selection plate. was not always sufficient.

The present invention aims to solve the problems of the prior art as described above. In the present invention, the electromagnet does not directly attract or operate the needle selector plate or its control element by its operation, but rather operates the electromagnet on the carriage of the knitting machine. The electromagnet selected according to the pattern signal is energized to respond to the needle selection plate, which is sequentially displaced to the working position in conjunction with the knitting needles that are pushed down with the lateral movement of the needle. One important point here is that when the electromagnet is activated, the plunger of the electromagnet is not attracted and takes an impulse stroke, but it moves as the knitting needle presses down. An electromagnet is used to selectively maintain the moved position of a member equivalent to a needle selector plate that is sequentially moved in conjunction with each other, and the electromagnet only holds the member and does not involve the action of the suction stroke. It is characterized by an electromagnetic needle selection control device with good characteristics using an electromagnet with a significantly smaller capacity than the previous examples.

That is, the gist of the present invention is a structure in which knitting needles, needle selection plates, and electromagnets are mechanically and electromagnetically related, and synchronized with the movement of the carriage from pattern signals via punch cards, etc. The configuration of the part where the electromagnet is selectively excited is as follows:
The example of the prior art can be used as is.

As a conventional example of electromagnetic needle selection control, JP-A-50
-7 0 6 4 The following explanation will be given by comparing the example from issue 4.

Although FIG. 1 schematically shows the conventional example as a control system diagram, it is noted that the former block 1, which is divided into two blocks 1 and 2 for convenience, is also common to the present invention. Figure 2 shows.

However, in order to understand the operation of the rear stage block 2' of the present invention, the entire control system including the front stage block 1 will be briefly explained.

The lines connected by broken lines in the figure indicate the mechanical connection or interlocking relationship.As the carriage of the hand knitting machine is slid horizontally on the throat plate, first the punch line is connected when the carriage traveling direction is changed. Signals for one knitting row are sent in parallel to a reading device 5 via a step feed interlocking means 4 that sends a pattern signal 3 such as one knitting row one row.

Next, when the carriage is operated laterally, the knitting needles 6 are sequentially pushed down as the carriage advances by the action of a push-down cam provided on the carriage, and return upward as the carriage passes.

In conjunction with the sequential depression of the knitting needles, the group of selector switches 7 are sequentially closed and opened by the synchronous interlocking means 8.

In the selector switch 7, a number of switches corresponding to the number of signals for one stage of the pattern signal 3 are sequentially connected in parallel on the output side at a predetermined arrangement period, and are synchronized with the carriage position via the synchronization interlocking means 8. As the switcher 9 moves, it always closes several adjacent switches in series, and each switch opens as the switcher 9 moves away from the switcher 9.

Thereby, the selector switch 7 distributes each of the parallel outputs of the reading device 5, which are read out in parallel from the pattern signal 3 every row, to the output end in synchronization with the carriage position, sequentially and overlapping several signals. The details are based on the example seen in the above-mentioned public gazette.

In this way, the electromagnets 10 are activated sequentially and selectively depending on the presence or absence of the signals by the output signals obtained from the front block 1.

Therefore, in the case of the conventional technology, when the electromagnet 10 is energized, the action is to directly pull the needle selection plate 11 toward the knitting needles 6 that are pushed down as the carriage advances, as described above. When a plurality of needle selection plates 11 arranged corresponding to each electromagnet 10 are selectively moved by the electromagnet 10, the engager 11a on the needle selection plate engages with the knitting needle 6 in a depressed state. The knitting needle 6 in the pressed-down position is held in the pressed-down position as follows.
In response, a needle selection cam (not shown) provided on the carriage is sequentially engaged to provide a needle selection action.

That is, in this example, the needle selection plate 11, which is operated by being attracted by the electromagnet 10, has a single function of holding the selected knitting needle in its depressed position.

In the latter block 2' in the case of the present invention, as will be described in detail later, the electromagnet 18 is energized to operate the needle selection control plate 12.
The needle selection control board 12 has a different structural role from the needle selection board 11 described above, and when the knitting needle 6 is pushed down as the carriage advances, the needle first moves through the needle selection control board 12. The electromagnets, which are arranged so that their magnetic poles are in sliding contact with each needle selection control board 12, do not normally hinder the movement of the needle selection control board 12 unless they are energized, so that the knitting needles 6 are not pushed down. The needle selection control board 12 also returns to the old position when returning upward from the state.

That is, in the case of the present invention, the knitting needles pushed down by the carriage are always kept in an interlocked state with the needle selection control board 12;
Therefore, in synchronization with the timing when the knitting needle reaches the depressed state, by energizing the electromagnet 18 corresponding to the knitting needle, the needle selection control plate 12 that is in sliding contact with the magnetic pole leg is attracted and the movement is restrained. By increasing the speed, the interlocking knitting needles 6 are also held in the depressed position, and while this holding action is maintained while the carriage continues to push down several knitting needles, the selection of the carriage is performed as in the previous example. The needle cam performs the needle selection function.

The details of the configuration of the present invention will be explained below as shown in Figures 3 and 4.
In the figure, knitting needles 6 are arranged in rows on the needle bed 13 so that they can move forward and backward.
In addition, the knitting needles 6 are normally kept at the position shown by the two-dot chain line upwardly under the bias of the leaf springs 14.

When the carriage 15 is operated, it is pushed down as shown by the solid line by the action of the push-down cam 16.

The push-down cam 16 sequentially pushes down the knitting needles 6 along the arcuate surface of the carriage 15 as the carriage 15 moves horizontally, and as the push-down cam 16 passes, the knitting needles 6 are returned upward by the leaf springs 14.

A needle selection control board 12 is arranged behind the knitting needles 16 at right angles to the knitting needles 16, and the same number of electromagnets 18 as the needle selection control boards 12 are arranged in parallel behind the needle selection control board 12.

As shown in FIGS. 4 and 5, the electromagnets 18 are arranged in one-to-one correspondence with each needle selection control plate 12, and are supported by the magnet base plate 19, with the magnetic pole side facing the needle selection control plate. Shoes 17, 17' of different lengths are oriented toward the 12 side and reach the surface of the corresponding needle selection foot plate 12.
......extends from the magnetic pole.

Shoe 17. 1 7', 1 7〃・・・・・・・・・
- and the needle selection control board 12 are all made of magnetic material, and the electromagnet 1
When 8 are excited, they form a closed magnetic path.

The electromagnet 18 and the needle selection control plate 12' are made to have no relationship with each other by passing through the shoe passage window 20 provided on the needle selection control plate 12 without contact.

The needle selection control plate 12 is supported by the holding rods 21 so as to be movable in parallel, and the amount of movement is determined by the slot 22 into which one of the holding rods fits.
and biased to one side by spring 23.

The needle selection control board 12 has a plurality of interlocking parts 24 disposed along the longitudinal direction of the needle bed 13 and engageable with the corresponding knitting needle tail ends 6a at a pitch of a predetermined number of knitting needles on the lower side of the knitting needles 6. It is equipped with

The number of knitting needles at this predetermined pitch corresponds to the number of electromagnets 18, and each needle selection control board 12 is configured so that the interlocking parts 24 on adjacent boards are sequentially shifted by one stitch of the knitting needles 6. It is something that will be placed.

As shown in detail in FIGS. 6 to 8 along with its functions,
Each interlocking part 24 is formed with a cam groove 24a that extends obliquely downward from a socket located below the knitting needle tail end 6a when the needle selection control plate 12 is in the inactive rest position due to being pulled by the spring 23. ing.

The groove width of the cam groove 24a is sufficient to allow the knitting needle tail end 6a to slide in and receive it all the way to the bottom without any trouble when it descends in the direction of arrow A. A cam portion 24b is formed which engages with the lowering of the needle tail end 6a and operates the needle selection control plate 12 in the direction of arrow B against the spring 23 by the action of a wedge cam, and the needle selection control plate 12 is provided on the upper side. A trunnion 24c is formed which acts as a presser cam to press down the knitting needle tail end 6a from above and keep it at the position 6a' when the knitting needle tail end 6a is held at the operating position 12' during the above operation.

In addition, the trunnion 24c side end of the socket of the cam groove 24a is
It is shaved off to make it easier for the knitting needle tail end 6a to enter.

In this way, the interlocking part 24 displaces the needle selection control plate 12 from the rest position to the operating position 12' at right angles to the descent of the knitting needle 6 as the corresponding knitting needle 6 descends, and there, the needle selection control plate 12 is If no restraint is applied, as the push-down cam 16 passes, the knitting needles 6 are returned to their original positions by the return spring of the leaf spring 14, and the needle selection control plate 12 is returned to its original position by the tension of the spring 23.

With respect to such reciprocating movement of the needle selection control plate 12, each electromagnet 18, whose one end surface of the magnetic pole shoe is in sliding contact with each plate side, does not exert any restraining action unless an excitation current is applied.

Continuing to explain the operation, in the case of the present invention, the closing timing of the selector switch 7 in synchronization with the movement of the carriage 15 is set to be given in the vicinity of the bottom dead center when the corresponding knitting needle 6 is pressed down. When the electromagnet 18 is energized in this state with the knitting needle position 6a'' pressed down, the shoe 17 magnetically attracts the corresponding needle selection control plate 12 and fixes and integrates it, and the spring 23 The needle selection control plate 12 is left as it is at the operating position 12' against the tension of.

As a result, as shown in FIG. 8, the corresponding knitting needle tail end is restrained by the interlocking part 24 and held at the depressed position 6a'.
Since the selector switch 7 is one in which the switcher 9 always closes a plurality of switches in series, the knitting needle 6 once gripped by the interlocking part 24 will not move even if the push-down cam 16 passes overhead. This gripping state is maintained for several knitting needles, during which time the needle bed 13 is moved by the action of a needle selection cam (not shown).
This produces the usual needle selection action of moving back and forth.

When the selector switch 7 is released from the electromagnetic operating state shown in FIG. 8, the knitting needles 6 are released from the restraint of the interlocking part 24 and return upward.

In short, when the push-down cam 16 moves back and forth over the rows of knitting needles 6 and sequentially pushes them down in response to the operation of the carriage 15, the needle selection control board 12 is also sequentially pulled out to the operating position 12' in conjunction with this, and the reading The electromagnet 18 is selectively energized by the device 5 in response to the signal to be selected, and the needle selection control plate 12 is controlled to remain in place, thereby producing a needle selection action.

As mentioned above, in the electromagnetic needle selection control of the present invention, the electromagnet 18
The role of is to selectively move the needle selection control board 12, which has been sequentially pulled out to the needle selection operating position 12' via the knitting needles 6 in synchronization with the movement of the carriage 15, to that position in response to the needle selection leg signal. Unlike the conventional example, the electromagnet 18 does not attract and actuate the target element by electromagnetic force, so it is sufficient to use a compact one with a significantly small capacity, and it generates little operating noise. The operational response of the electromagnet to the closing timing of the selector switch 7 is also good.

Furthermore, since this is a so-called magnetic clutch type configuration means,
Even if there is a slight deviation in the setting of excitation timing, etc., it operates relatively easily and smoothly.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a control system of a conventional device in comparison with the present invention, Fig. 2 is a schematic diagram of the system of the present invention, showing the features of the invention, and Fig. 3 and subsequent figures show embodiments. Figure 3 is a side sectional view of the device, Figures 4 and 5 are configuration diagrams of the main parts, and Figure 4
The figure is a partial layout view from the front, and FIG. 5 is a partially enlarged plan view. FIGS. 6 to 8 are explanatory diagrams of each operation of the main parts. 3...Pattern signal, 5...Reading device, 6
...Knitting needle, 6a...Knitting needle tail end, 8...
... Synchronous movement means, 10 ... Conventional electromagnet, 12 ... Needle selection control board, 15 ... Carriage, 16 ... Push down Cam, 17...
One magnetic pole shoe 18... Electromagnet, 24...
...Interlocking part, 24a...Cam groove.

Claims (1)

[Claims] 1. The pattern signal read from the signal recording body is synchronously linked with the movement of the carriage, and is periodically and sequentially distributed to the output end, and the electromagnet disposed at the output end is selectively excited and controlled in accordance with the pattern signal. In a needle selection device of a hand knitting machine that selectively holds and controls knitting needles that are sequentially pushed down in accordance with the movement of the carriage at the pushed down position, the knitting needle engages with the tail end of the knitting needle when the knitting needle is pushed down. The number of electromagnets is connected to the number of interlocking parts each formed with a cam groove which causes the knitting needle to actuate perpendicularly to the depression by cam action, and which restrains and holds the tail end of the knitting needle when it is held in the actuation position. The same number of needle selection control boards as the electromagnets are arranged at a pitch corresponding to the number of knitting needles, and the interlocking parts of the needle selection control boards adjacent to each other in the order of operation are shifted in the order of one knitting needle. Then, each corresponding electromagnet is disposed toward each plate side of the needle selection control board with one end surface of each magnetic pole in sliding contact, and when the knitting needle is in a depressed state, the electromagnet is selected. An electromagnetic needle selection device characterized by target excitation.