JPH0112856B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an automatic carriage drive device for a hand knitting machine.

(Prior art) Conventionally, as this type of drive device for hand knitting machines,
A technology in which a carriage is connected to a belt that runs as a forward/reverse rotation motor rotates, and the carriage is automatically driven back and forth from side to side, making it possible to regulate the reversal position of the carriage within any range at any position. is known (Jitko No. 55-31033).

Furthermore, in order to prevent damage to the automatically traveling carriage, a technique is disclosed in which the drive belt side and the carriage side are automatically disconnected (Japanese Patent Application Laid-Open No. 55-36382).

(Problems to be Solved by the Invention) During knitting work, if the movement of the carriage is stopped due to a collision between the internal cam of the carriage and the knitting needles, a malfunction of the knitting needles due to a knot in the yarn, or other accidents, the above-mentioned prior art In the former case, overload is applied to the motor, resulting in a motor burnout accident.

The latter technology is designed to prevent this motor accident from occurring, but even if the drive belt is disconnected from the carriage, the motor continues to rotate and drive the belt, resulting in unnecessary idle operation.

In the present invention, when excessive sliding resistance occurs in the carriage, the continuity between the carriage and the drive belt is released, and then the motor is automatically stopped to eliminate the conventional inconvenience, and the next stage of accident repair can be carried out immediately. It was designed so that it would be applied to the body.

[Structure of the invention]

(Means for Solving the Problems) In the present invention, a driving body for driving a carriage is fixed to a drive belt, and the driving body is connected to the carriage via an interlocking body and a connecting plate provided in the middle.

The connecting plate is arranged to separate from the carriage and be displaced relative to the interlocking body when an overload is applied to the carriage.

The case body is provided with a sensing switch that senses the operating position of the interlocking body due to the displacement of the connecting plate, and a cutoff circuit that turns off the power to the motor control circuit by the switch.

(Operation) When excessive sliding resistance is generated on the carriage, the engagement portion between the connecting plate and the carriage is disengaged, the connecting plate is separated from the carriage, and the interlocking body is displaced by spring action. This displaced interlocking body is moved laterally (to the left or right) together with the driving body by a driving belt, and one end thereof abuts the sensing lever of the sensing switch. This contact turns off the power to the motor control circuit and stops the motor from rotating.

(Example) 1 is a machine base on which a hand knitting machine main body 2 is placed, 3 is a carriage that slides on the main body 2 in the left-right direction, and 4 is its handle.

A horizontally long case body 6 is fixed to mounting base plates 5 provided on the left and right sides of the machine base 1.

Openings 7 and 8 are provided on the entire surface and upper surface of the case body 6, respectively, and on the right end there is a reversible deceleration motor 10 for running the belt 9, a pulley 16 that transmits its power, a motor cover 11, and a motor 10.
A box 12 is provided for housing the control circuit of the control circuit.

13 is a scale provided on the case upper plate 6';
The amount of movement of the carriage 3 is displayed on both the left and right sides with scales corresponding to the number of rows of knitting needles arranged in the main body 2. The belt 9 has shafts 14 on both outer sides of the case body 6.
It is stretched between pulleys 16 and 17 supported at 15.

Further, a driving body 18 for driving the carriage 3 in the left-right direction is fixed to the front part of the belt 9.

The driving body 18 has an interlocking body 19 connected to the shaft 2.
It is pivoted at 0. Reference numeral 21 denotes a spring serving as an interlocking body displacement means, which is fitted onto the shaft 20, one end of which abuts the driving body 18, and the other end suspended from the interlocking body 19.
The interlocking body 19 is biased in the clockwise direction when viewed in FIG.

The driving body 18 side of the interlocking body 19 is the “dog”-shaped portion 1
9a, and a connecting plate 23 is pivotally connected to the other side by a shaft 22. The connecting plate 23 has a notch 24 into which a connecting pin 27 having a collar 26 fixed to the carriage handle 4 with a screw 25 is fitted. The opposite side of the notch 24 of the connecting plate 23 is a flat surface 28, and an L-shaped pressing plate 29 is pressed against this by a compression spring 30. The push plate 29 is slidably guided by shafts 31 and 32 through a groove 29a on the lower surface of the interlocking body 19. 33 is a spring hanging plate fixed to the interlocking body 19. The connecting plate 23 is connected to the push plate 2 by spring pressure.
When pressed by the lever 9, it is in the position shown by the solid line in FIG. 6, but it can be rotated about the shaft 22 as shown by the two-dot chain line to the released position.

The case body 6 side of the driver 18 is provided with grooves facing the upper and lower bent portions 6a and 6b of the front opening 7, and is guided by these grooves and can be moved left and right. 18a
is a protrusion provided on the upper part of the driving body 18 for stopping the rotation of the interlocking body 19.

Reference numeral 35 denotes a non-magnetic fixing plate provided between the case body 6 and the case top plate 6'. Width width knobs 37 and 38 are provided on the upper and lower bent portions 36, and the case body 6 is inserted through the upper opening 8. It is made to protrude upward and can be moved in the left and right longitudinal directions.

A conductive plate 40 is attached to the fixed plate 35 by a supporting plate 39.
41 is installed. The conductive plate 40 has printed circuits 40a and 40b on the upper and lower sides, printed circuits 41a and 41b on the upper and lower sides of the conductive plate 41, and a printed circuit 41c on the other side. The circuit has three series: P connecting 40a and 41a, Q connecting 40b and 41c, and R starting from 41b.

In addition, the width knobs 37 and 38 are connected to reed switches 42 and 43 that instruct the motor 10 to switch between forward and reverse directions.
A pair of holding plates 44a, 44b and 45a, 45b made of a conductive material with spring action are connected to the reed switches 42, 43.

The presser pieces 44a and 44b of the knitting width knob 37 are attached to the printed circuits 40a and 40b, and the presser pieces 45a and 45b of the knitting width knob 38 are attached to the printed circuits 41a and 4.
1b, respectively.

46 is a transmission body provided on the rear side of the drive body 18;
As the (specifically magnetic) belt 9 travels, when it reaches the positions of the knitting width knobs 37 and 38, the reed switches 42 and 43 are turned on to instruct the motor 10 to rotate in forward and reverse directions.

That is, as shown in FIGS. 3 and 5, when the driver 18 slides to the right in FIG. 3, the pulley 16 receiving power from the motor 10 rotates counterclockwise and As shown in FIG. 5, when the driver 18 reaches the position of the width knob 38, the magnet 46 turns on the reed switch 43, causing the motor 10 to rotate. Therefore, when the left side width stitching knob 37 is reached, the magnet 46 moves the reed switch 42.
Since it is turned ON, the rotation of the motor 10 is changed. In this way, the driving body 18 controls the knitting width knobs 37, 3.
8. Slides back and forth within a set distance range.

47 is a sensing switch (specifically a limit switch) fixed to the case top plate 6', and lever 48
is protruded, and when the interlocking body 19 is displaced as shown by the two-dot chain line in the second figure, the lever 48 is actuated by contact with the doglegged portion 19a, and the current is turned off.

In FIG. 8, P, Q, and R indicate contacts drawn out from the conductive plates 40 and 41 shown in FIG.
9 is a power switch, and 50 is a start switch, which closes when pressed, but opens when released.

51 is a relay, 52 is a relay contact, and motor 1
Switch the current to 0. The relay 51 continues to maintain the instantaneous contact and separation action of the reed switches 42 and 43,
The rotation of the motor 10 is maintained continuously.

53 is also a relay, which has a holding circuit for the starting switch 50, and turns off the power to the motor 10 when the sensing switch 47 is activated and the current is turned off. That is, it constitutes a cutoff circuit. Note that 53' is a contact, which is normally open, and becomes closed when current flows through the coil 53''. 54 is a transformer that converts the voltage of the power source 55. 56 is a capacitor for the motor 10. .

Next, the operation will be described. When a knitted fabric is placed on the knitting machine main body 2 and the start switch 50 is pressed, the motor 10 rotates, rotates the belt 9 via the pulley 16, and moves the drive body 18. The driving body 18 is an interlocking body 19,
The carriage 3 is connected via the connecting plate 23 and the connecting pin 27.
Since the carriage 3 is connected to the knitting machine main body 2, the carriage 3 slides on the knitting machine main body 2 and knits.

As shown in FIGS. 3 and 5, when the pulley 16 rotates counterclockwise, the driver 18 moves to the right, and when the driver 18 reaches the position of the knitting width knob 38, the magnet (conductor) ) 46 is the reed switch 43
Turn on. Therefore, the circuit of the conductive plates 40, 41 becomes P-41a-41b-R, the current is reversed, the motor 10 is rotated in the reverse direction, the pulley 16 is rotated clockwise, and the drive body 18 is moved leftward. When the driving body 18 moves and reaches the position of the left width knob 37, the magnet (conductor) 46 turns on the reed switch 42. Therefore, the circuit of conductive plates 40 and 41 is P-41a-40a-40b-41c-Q
Then, change the direction of the current, convert the rotation of the motor 10, and rotate the pulley 16 counterclockwise,
Move the driver 18 to the right.

In this way, the motor 10 rotates forward and backward, the drive body 18 reciprocates within the range set by the knitting width knobs 37 and 38, and the carriage 3 slides to knit.

When an overload is applied to the carriage 3, that is, when the cam inside the carriage 3 collides with the knitting needle, a knot in the thread comes to the knitting needle and the knitting becomes slow, or when the thread is too thick and the knitting becomes slow. When the sliding resistance of the carriage 3 increases more than during normal knitting, the drive body 18 and the carriage 3 are disconnected from each other. To explain the connection release means in this case, when the sliding resistance of the carriage 3 increases, the carriage 3 tries to remain in that position against the driving force of the driving body 18 to move it. For this reason, a resistance action acts between the connecting pin 27 with the collar 26 fixed to the handle 4 of the carriage 3 and the connecting plate 23 in which the notch 24 is fitted, and the connecting plate 23 holds the shaft 22. Try to rotate around the center. Since the press plate 29 is pressed against the flat surface 28 of the connecting plate 23 by the compression spring 30, its rotation is prevented, but when the load is large, the press plate 29 rotates against the compression spring 30. (Figure 7). Then, it rotates to the position shown in two-dot chain line in FIG. 7, and the connecting plate 23 comes off the connecting pin 27, and the connection is released.

In this way, when the notch 24 of the connecting plate 23 is disengaged from the connecting pin 27 and the collar 26, the interlocking body 19 rotates around the shaft 20 by the action of the spring 21, which is a displacement means, and moves to the position shown by the two-dot chain line in FIG. It rotates until its rising portion hits the protrusion 18a, as shown by , and then stops.

Since the driving body 18 is moving, when it reaches the position of the sensing switch 47, the doglegged portion 19a of the interlocking body 19 operates the lever 48 of the sensing switch 47 to turn off the current.

By turning off the current, the interrupting circuit constituted by the relay 53, that is, the relay contact 53' is cut off, and therefore the power to the motor control circuit is cut off, the motor 10 is stopped, and the drive body 18 is stopped at this position.

In addition, when attempting to restart operation again, lower the interlocking body 19 to the position shown by the solid line in FIG. Sensing switch 47
Set to ON. Next, the start switch 50 is pressed to apply current to the coil 53'' of the relay 53, and the contact 5
3' is a closed circuit. As a result, current flows through the motor 10 again, and the driving body 18 is moved.
Driving begins.

[Effects of the Invention] Due to heavy sliding overload of the carriage, the connection between the drive belt and the carriage is released, and then the motor rotation stops, so (1) the operator must constantly monitor the knitting condition; Instead, you can effectively use that time for other purposes.

(2) Dry running of the motor is eliminated, contributing to equipment maintenance and reduced power consumption.

(3) Upon sensing that the motor rotation has stopped, the next action can be taken immediately.

[Brief explanation of drawings]

Fig. 1 is an explanatory overhead view of a knitting machine equipped with the device of the present invention, Fig. 2 is an enlarged cross-sectional view taken along the line A--A in Fig. 1, Fig. 3 is an explanatory diagram of the mechanism of the present invention, and Fig. 4 is an explanatory diagram of the mechanism of the present invention. An explanatory diagram of the conductive plate circuit, FIG. 5 is an explanatory diagram of the action of FIG. 4,
6 is an explanatory diagram as viewed in the direction of the α arrow in FIG. 2, FIG. 7 is an explanatory diagram of the operation of the connecting plate, and FIG. 8 is an electromagnetic circuit diagram of the device of the present invention. 3...carriage, 4...handle, 6...case body,
9... Drive belt, 10... Motor, 18... Drive body,
19... Interlocking body, 23... Connection plate, 37... Knitting width knob, 38... Knitting width knob, 47... Sensing switch.

Claims (1)

[Claims] 1. Pulleys are provided on both outer sides of the oblong case body placed on the machine stand, a belt is passed between the pulleys, a motor capable of forward and reverse rotation is connected to one of the pulleys, and the rotation of the motor is switched between the pulleys. Two knitting width knobs each having a switch are installed on the right and left arbitrary positions so that they can be recognized, and the belt is connected to a drive body that drives the gear carriage of the hand knitting machine installed on the machine stand. A hand knitting machine is provided, wherein the nine-degree body is provided with a transmission body that transmits power to the switch of the knitting width knob, and further provided with a control circuit that converts the transmission between the switch and the transmission body into forward and reverse rotation of the motor. In the carriage drive device, a decoupling means rotatable about one axis releases the connection between the drive body and the carriage, an elastic member that applies pressure to the decoupling means, an elastic member that applies pressure to the decoupling means, and an upper part after the decoupling means is operated. an interlocking body and a displacement means that are displaced, a sensing section on the displaced interlocking body, and a sensing switch that senses the sensing section;
An automatic drive device for a hand knitting machine, comprising a cutoff circuit for turning off power to the motor control circuit by the sensing switch.