JPS6315386B2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a knitting machine, and particularly to a knitting machine. The support member is integrally supported so as to be movable in the left and right direction, and when knitting a stitch, the support member moves in the left and right direction, thereby moving in the left and right direction above the hook of the knitting needle and supplying the knitting yarn into the hook. The present invention relates to a knitting machine equipped with a movable yarn opening.

Purpose of the invention The purpose of the invention is to
When the movable yarn head has moved to one of the predetermined end positions of the left and right movement range on the carriage, the operation of the movable yarn head is stopped, thereby making it possible to habitually knit at a predetermined position at any time. It is possible to carry out yarn switching operations without any confusion, and if there is a carriage component on the front side of the carriage that would be a hindrance to the knitting yarn switching operation, the movable yarn opening is placed on the side that avoids it. An object of the present invention is to provide a knitting machine in which a stop position can be determined.

Composition of the Invention A cam wheel is provided on a carriage, and includes a cam wheel that is rotatable around a single axis and that moves the support member in the left-right direction by the rotation of the cam wheel, and the cam wheel is rotated. A drive device, a stop switch for stopping the drive operation of the drive device, a signal generation means for generating an electric signal when the support member moves to one of a predetermined movement end position of the left and right movement range, and a first control element that is connected to the signal generating means and the stop switch and outputs an electric signal through the stop switch only when the electric signal is generated from the signal generating means with the stop switch being operated to close; and a second control element that is activated by an electric signal outputted via a stop switch to stop the drive device.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a large number of knitting needles 2 and comb teeth 3 are arranged alternately on a needle bed 1 of this knitting machine. has been done. Further, as shown in FIG. 1 and FIGS. 6a to 6d, a rack 4 having a large number of teeth of the same pitch as that of the knitting needles 2 is provided on the rear upper surface of the needle bed 1.

As shown in FIG. 1, a carriage 5 is mounted on the needle bed 1 so as to be movable in the left and right directions. A plurality of cam wheels 6 are rotatably provided at the upper center of the carriage 5, and feed switching cams 7 as illustrated in FIGS. 1 and 11 are provided on the upper and lower surfaces of the cam wheels 6. A large number of control cams such as a feed cam 8 and yarn head moving cams 9a and 9b are formed. As shown in FIG. 5, a motor 10 as a drive device is mounted on the carriage 5, and the cam wheel 6 is driven through a plurality of gears 11, 12, 13, 14, 15, 16 as shown in FIGS. It is designed to rotate clockwise.

As shown in FIG. 4, the lower surface of the carriage 5 has a working butt passage 17 for guiding the butt 2b of the knitting needle 2 in the working position on the needle bed 1, and a working butt passage 17 for guiding the butt 2b of the knitting needle 2 in the rest position. A rest butt passage 18 is formed for this purpose. Further, a butt guide groove 19 is formed from the center of the working butt passage 17 toward the front. As the cam ring 6 rotates, a predetermined control cam on the cam ring 6 moves the knitting needle operating member 20 shown in FIG. One of the knitting needles 2 is moved back and forth along the butt guide groove 19, and after the one knitting needle 2 is advanced to the flat-out position, it is retreated to the rear of the knock-over position.

As shown in Figures 1 and 4, on the carriage 5 there is a
The main sub-knitting needles 21 are supported so as to be movable back and forth and rotatably with their hooks 21a facing rearward. The sub knitting needles 21 are moved forward and backward by the action of a predetermined control cam on the cam ring 6 based on the rotation of the cam ring 6 while facing one knitting needle 2 on the needle bed 1 from the front. Rotated, both knitting needles 2, 21
As the hooks 2a and 21a are connected and moved, stitches are transferred, etc.

As shown in FIGS. 1 to 4, a movable yarn head 22 is supported on the carriage 5 so as to be movable in the left-right direction via a support member 23, and one knitting needle on the needle bed 1 that has been advanced to the flattening position 2 or above the hooks 2a, 21a of the sub knitting needles 21 on the carriage 5 in the left and right direction.
Knitting yarn is supplied to 1a.

That is, a thread operating lever 24 is supported on the carriage 5 so as to be rotatable and movable up and down via a support shaft 25, and its front end is connected to a support member 23 of a movable thread operating lever 22, and two levers are provided at its right end. Yarn head moving cam 9 formed on the opposing surface of the cam ring 6
A cam follower 26 that can be selectively engaged with a and 9b is provided to protrude upward and downward. Also, Carriage 5
A switching plate 27 is supported on the top so as to be movable back and forth, and a part of the side wall of the switching plate 27 engages with a pin 25a on the support shaft 25 to move the thread operating lever 24 up and down as the switching plate 27 moves back and forth. A cam groove 27a is provided for this purpose.

Then, as shown in FIGS. 1 and 3, the switching plate 27
When the carriage 5 moves to the front position, the thread operating lever 24 is placed in the upper position by the action of the cam groove 27a, and the cam follower 2
6 is engaged with the leftward thread moving cam 9b provided on the lower surface of the upper cam ring 6, and when the carriage 5 is traveling to the right, the switching plate 27 is moved to the rear position as shown in FIG. In this case, the thread operating lever 24 is placed in the lower position by the action of the cam groove 27a, and the cam follower 26 engages with the right thread moving cam 9a provided on the upper surface of the lower cam ring 6. It's getting old. Therefore, as is clear from FIG. 11, as the cam ring 6 rotates, when the carriage 5 moves to the right, the movable yarn tip 22 moves above one knitting needle 2 or the sub-knitting needle 21 based on the cam action of the yarn tip moving cam 9a. Knitting needles are fed across from the left and right to the right, and when the carriage 5 moves to the left, the movable yarn tip 22 moves above one knitting needle 2 or sub-knitting needle 21 from the right side based on the cam action of the yarn tip moving cam 9b. Feed the knitting yarn across to the left.

As shown in FIG. 1, a permanent magnet 28 is fixed on the support member 23 of the movable thread head 22.
Further, a Hall element 29 is provided on the carriage 5, and together with the permanent magnet 28, constitutes an electric signal generating means. This Hall element 29 corresponds to the permanent magnet 28 and generates an electric signal by magnetism.

Next, a configuration for moving the carriage 5 step by step will be described. As shown in FIGS. 6a to 6d, a pair of links 30, 3 are provided at the rear of the carriage 5.
1 are rotatably supported by a support shaft 32 and connected to each other by a pin 33 at their opposing inner ends. External teeth 34 are provided at the outer ends of each link 30, 31.
is rotatably supported by a pin 35, and the link 3
With the rotation of 0, 31, the rack 4 on the needle bed 1
It is becoming more and more disengaged. Both links 30,3
1, an internal tooth 36 having a pair of teeth corresponding to the external tooth 34 is supported by a pair of pins 37 through an elongated hole 38 so as to be relatively rotatable and horizontally movable. Accordingly, the external teeth 34 are alternately engaged with and disengaged from the rack 4.

As shown in FIGS. 1 to 3, an actuating lever 39 is rotatably supported on the carriage 5 by a support 40, and is connected to the one link 30 by a pin 41 at its rear end, and a cam wheel at its left end. A cam follower 42 is provided which engages the feed switching cam 7 on the feed switching cam 6 . Then, according to the cam shape of the feed switching cam 7 shown in FIG. 11, the links 30 and 31 are rotated once through the operating lever 39 while the cam wheel 6 is rotated once, and as shown in FIGS. As shown, from the state in which the external teeth 34 are disengaged from the rack 4 and the internal teeth 36 are engaged, the external teeth 34
When engaged, the internal teeth 36 are disengaged, and as the external teeth 34 are further disengaged, the internal teeth 36 are disengaged.
is adapted to return to the engaged state.

As shown in FIGS. 1 to 3, a feed operating lever 43 is rotatably supported on the carriage 5 by a support shaft 44, and a piece 45 that engages with the two prongs of the internal teeth 36 is rotatable at the rear end. A cam follower 46 that engages with the carriage feed cam 8 on the cam ring 6 is provided at the front end. An interlocking lever 47 is rotatably supported on the carriage 5 in front of the feed operating lever 43 by a support shaft 48, and the front end of the interlocking lever 47 is connected to the support member 23 of the movable thread head 22 via a pin 49 and an engagement groove 50. In addition, a protrusion 47a is formed at the rear end facing upward. A pair of engagement levers 51 and 52 are rotatably supported on the support shaft 48, and are biased to rotate in a direction toward each other by a spring 53, so that the engagement levers 51 and 52 are rotatably supported on the feed operating lever 43 on their inner surfaces. The protrusions 47a on the cam follower 46 and the interlocking lever 47 are engaged alternately.

As shown in FIGS. 1 and 3, when the carriage 5 is in the leftward movement state and the movable thread head 22 is moved to the left position, the protrusion 4 of the interlocking lever 47
7a, the right engagement lever 52 is disengaged from the cam follower 46 on the feed actuating lever 43, and the left engagement lever 51 engages with the cam follower 46, causing the cam to close. The follower 46 is pressed toward the inner peripheral edge of the carriage feed cam 8. Further, when the carriage 5 is in the rightward movement state and the movable thread port 22 is moved to the right position as shown in FIG. Matching lever 51
is disengaged from the cam follower 46, and the right engagement lever 52 engages with the cam follower 46.
The cam follower 46 is pressed toward the outer peripheral edge of the carriage feed cam 8.

Therefore, when the carriage 5 is in the rightward movement state, the rack 4 is moved by the action of the feed switching cam 7.
The state of engagement of the external teeth 34 and internal teeth 36 with respect to the sixth
Switching from the state shown in Figure a to the state shown in Figure 6B,
The internal teeth 36 are disengaged from the rack 4, and in this state the equal radius cam portion 8 of the carriage feed cam 8 shown in FIG.
Due to the action of the cam surface from a to the outer cam surface 8b, the inner tooth 36 moves one pitch of the rack 4 to the right (leftward when viewed from the rear side in FIG. 6 c) as shown in FIG. 6 c. be done. Thereafter, due to the action of the feed switching cam 7, the engagement state of the external teeth 34 and the internal teeth 36 with respect to the rack 4 changes from the state shown in FIG. 6c to the state shown in FIG. 6d.
In this state, the inner teeth 36 are engaged with the rack 4, and in this state, the action of the cam surface extending from the outer cam surface 8b to the equal radius portion 8a of the carriage feed cam 8 causes the rear end of the feed operating lever 43 to be moved. 2 is applied with rotational force in the counterclockwise direction as shown in FIG. 2, and the carriage 5 is moved one pitch to the left and right.

Similarly, when the carriage 5 is in the leftward movement state,
Due to the action of the cam surface from the equal radius cam portion 8a to the inner cam surface 8c of the carriage feed cam 8 shown in FIGS. 1 and 3, the inner tooth 36, which is detached from the rack 4, is moved one pitch to the left. Thereafter, due to the action of the cam surface from the inner cam surface 8c of the carriage feed cam 8 to the equal radius portion 8a, the feed operating lever 43 is moved clockwise in FIGS. 1 and 3 with the internal teeth 36 engaged with the rack 4. is applied, and the carriage 5 is moved one pitch to the left.

Next, the carriage drive direction changing means 54 provided behind the stop butt passage 18 of the carriage 5 will be explained. Figures 1, 4, 7 and 8 a, b
As shown in FIG. 2, an actuating plate 55 is supported at approximately the center of the left and right sides of the carriage 5 at the rear of the rest butt passage 18 so as to be movable in the left-right direction, and engaging pieces 55a are provided at both ends of the actuating plate 55 to project downward. There is. A movable body 56 is supported on the carriage 5 on both left and right sides of the actuation plate 55 so as to be movable in the left-right direction, and an engagement recess 56a that can be engaged with the engagement piece 55a of the actuation plate 55 is formed on the upper surface of the movable body 56. ing. Both movable bodies 56 are always biased and held toward a predetermined position on the center side of the carriage 5 shown in FIGS. 7 and 8a by the action of a spring 57.

A sensing member 58 is rotatably supported by a pin 59 at the outer ends of both movable bodies 56, and the sensing member 58 is located in the rest butt passage 18 and detects rests outside the knitting section on the needle bed 1. An inclined cam surface 58a and an engaging portion 58b that can be engaged with the butt 2b of the knitting needle 2 are provided. By the action of a leaf spring 60 provided on the movable body 56, both sensing members 58 are brought to a working position where the inclined cam surface 58a or the engaging portion 58b at the outer end can engage with the butt 2b of the dormant knitting needle 2. The facing side is energized.

The carriage 5 is located above the inner ends of both sensing members 58.
An operating rod 61 is supported so as to be movable up and down, and a spring 6
2, the sensing member 58 is always biased downward, and the sensing member 58 is held in an inactive position with its outer end floating against the leaf spring 60, as shown in FIG. As shown in FIGS. 7 to 10, an operating member 63 is supported on the carriage 5 so as to be movable left and right for setting the reversal of the moving direction of the carriage 5 to automatic or manual.
When set to the automatic reversal position on the left side shown in the figure, both operating rods 61 are moved to the upper position by the cam action of the cam plate 64 that moves left and right integrally with the operating member 63, as shown in FIG. 8a. When both sensing members 58 are placed in the operating position and the operating member 63 is moved to the right manual reversal position according to the display in FIG. 9, the cam is activated as shown in FIG. Due to the cam action of the plate 64, both actuating rods 61 are placed in the lower position, and both sensing members 58 are placed in the inactive position.

On the other hand, as shown in FIGS. 1 to 3, a reversing actuation lever 65 is rotatably supported on the carriage 5 by a support shaft 66, and is connected to the actuation plate 55 by a pin 67 at the rear end, and at the left end. It is connected to the switching plate 27 at. When the actuation plate 55 is moved to the left, the switching plate 27 is moved rearward via this reversing actuation lever 65, and when the actuation plate 55 is moved to the left, the switching plate 27 is moved forward. It is becoming more and more common.

Further, as shown in FIGS. 9 and 10, the operating member 6
A switching operation member 68 for manually switching the moving direction of the carriage 5 is supported on the carriage 5 in front of the carriage 5 so as to be movable in the left-right direction.
First and second movable levers 71 and 72 rotatably mounted on the carriage 5 by support shafts 69 and 70
It is linked to the switching plate 27 via. When this switching operation member 68 is set to the right row position on the right side shown in FIG.
When the switching plate 27 is arranged at the rear position as shown in the figure, and when the switching operation member 68 is set to the left side position according to the display in FIG. 9, as shown in FIGS. The switching plate 27 is arranged at the front position.

Therefore, as shown in FIGS. 9 and 10, the operating member 6
3 is set to the automatic reversal position and the switching operation member 68 is placed in the rightward position, both sensing members 58 are placed in the operating position as shown in FIG. Also, as shown in FIG. 2, the switching plate 27 is placed in the rear position, the thread operating lever 24 is placed in the downward position, and the cam follower 2
6 is engaged with the rightward thread head moving cam 9a, and the carriage 5 is in a state of moving stepwise to the right.

In this state, as described above, as the cam wheel 6 rotates, the carriage 5 is moved stepwise to the right by the cam action of the feed switching cam 7 and the carriage feed cam 8, and the When it reaches the right side, it is located on the left side of the carriage 5 as shown in Figure 8a (located on the right side when viewed from the back side of the figure).
The engaging portion 58b of the sensing member 58 engages with the butt 2b of the first knitting needle 2 of the dormant knitting needle group, and the left side (FIG. 8a)
The movement of the movable body 56 (on the right side) is prevented. Thereafter, when the carriage 5 is moved further to the right (left side in the figure), the sensing member 58 on the right side (left side in the figure) detects the engagement between the inclined surface 58a and the butt 2b of the dormant knitting needle 2. Due to the collision, it is moved integrally with the carriage 5 while being rotated to avoid it, and a relative movement occurs between the sensing member 58 on the left side (right side in the figure) and the moving body 56.

Due to the relative movement, as shown in FIG. 8b, the engaging piece 55a of the actuating plate 55 engages with the engaging recess 56a of the moving body 56 on the left side (right side when viewed from the back side of the figure), and then As the carriage 5 moves to the right, the actuating plate 55 is moved relative to the left (to the right in the figure) with respect to the carriage 5. As a result, the reverse operation lever 65 on the carriage 5 is rotated counterclockwise from the state shown in FIG. 2, the switching plate 27 is moved to the forward position as shown in FIG. The cam follower 26 is engaged with the leftward yarn head moving cam 9b, and the moving direction of the carriage 5 is reversed from right to left outside the knitting section of the needle bed 1. As the switching plate 27 moves to the front position, the switching operation member 68 is moved to the left via the pair of rotating levers 72 and 71 shown in FIG. 10, and is placed in the leftward position.

In this state, when the carriage 5 is moved step by step to the left and reaches the left side outside the knitting section on the needle bed 1, the carriage 5 moves to the opposite left and right side, similar to the above-mentioned reversal operation on the right side outside the knitting section. The moving direction of the carriage 5 is reversed from left to right by the actions of the sensing member 58, moving body 56, etc. located therein.

Also, from the state shown in FIGS. 9 and 10, the operating member 63
When moved to the right and set to the manual reversal position, both sensing members 58 are placed in the inactive position where they do not engage with the butt 2b of the resting knitting needle 2, as shown in FIG. Therefore, when the carriage 5 is moved step by step in this state, the moving direction of the carriage 5 is not automatically reversed. For this purpose, with the carriage 5 moved to an arbitrary position, the ninth,
When the switching operation member 68 shown in FIG. It can be reversed as appropriate.

As shown in FIGS. 9 and 10, a pattern switching member 73 for switching and setting the knitting pattern is provided on the carriage 5 behind the operating member 63. Further, a stage number counter 74 as a counter is disposed in front of the switching operation member 68,
By setting the required number of formation stages in this stage number meter 74 in advance, the carriage drive direction changing means 5
Each time the moving direction of the carriage 5 is reversed in step 4,
The set number of stages is subtracted via an operating lever 75 as an operating means connected to the second rotating lever 72 shown in FIG. 10, and when the value reaches 0, the drive of the motor 10 is stopped. It's getting old. Furthermore, a start switch 76 and a stop switch 77 are arranged in front of the stage number meter 74, so that the start switch 76 can start the motor 10, and the stop switch 77 can stop the motor 10.

As shown in FIG. 9, a cover K is fixed to the top surface of the carriage 5 with the buttons of each switch exposing the operating members to the outside, and a cover K is fixed to the front corner of the carriage 5.
A movable system port 22 is arranged in the space Ka so as to be movable left and right.

Therefore, in this knitting machine, when knitting a surface stitch for rubber knitting, for example, the rotation angle positions 1 to 14 of the cam ring 6 shown in FIG. The operations shown at 14a and 14b are performed, and one stitch of stitches is knitted by one rotation of the cam wheel 6.

That is, one knitting needle 2 on the needle bed 1 is advanced from the state shown in FIGS. 12a and 1b to the state shown in FIGS. 12a and 12b.
2b, the secondary knitting needles 21 on the carriage 5 are rotated as shown in FIGS. 12, 3a and 3b, and then both knitting needles 2 and 2 are advanced as shown in FIGS. 21 was moved backwards,
The combination of both hooks 2a, 21a and the transfer of the stitches from knitting needle 2 to sub-knitting needle 21 are performed, and further, as shown in FIGS. is released, and then the sub-knitting needles 21a are rotated back as shown in FIGS. 6a and 6b.

In this state, as shown in FIG. 12, 7a and 7b, the knitting yarn is supplied to the hook 21a of the movable yarn opening 22 by crossing the upper part of the hook 21a of the sub knitting needle 21 from the left side to the right side, as shown in FIG. 12, 8a. , 8b, after the sub-knitting needles 21 are advanced past the knock-over position and the face stitches are knitted, as shown in FIGS. 9a and 9b,
As shown in FIG. 2, the sub-knitting needles 21 are slightly rotated and raised, and the knitted stitches are lifted up and tightly adhered to the hooks of the sub-knitting needles 21, thereby preventing them from rising or coming off. And FIG. 12 10a, 1
After the sub-knitting needle 21 is rotated back as shown in 0b, the sub-knitting needle 21 is advanced to the flattening position as shown in Figs. 12a and 11b, and in this state, as shown in Figs. 12a and 12b, sub knitting needle 2
1 is rotated again, and hook 2 of both knitting needles 2, 21
a, 21a are combined.

As shown in FIGS. 13a and 13b, after the stitches are transferred from the sub-knitting needle 21 to the knitting needle 2 by forward movement of both knitting needles 2 and 21, the sub-knitting needle 2
is rotated back and the connection between both hooks 2a and 21a is released, and the knitting needles 2 are further retreated as shown in FIG. A stitch of a predetermined size is formed according to the amount of withdrawal. and,
In this state, the carriage 5 is moved step by step to the right by the action of the carriage feed cam 8, etc.
The movable yarn tip 22 is returned to the left and right from the right side of the sub-knitting needle 21 by the action of the right-hand yarn tip moving cam 9a and the like, resulting in the state shown in FIGS. 1a and 1b.

In addition, when knitting the back stitch for rubber knitting, the sub knitting needles 21 are not moved back and forth, and the 1st stitch on the needle bed 1 is
The main knitting needle 2 is moved back and forth, and with the knitting needle 2 advanced to the slip-off position, the movable yarn opening 22 is moved and knitting yarn is supplied to the hook 2a, and then the knitting needle 2 is moved to the rear of the knock-over position. It is retreated and the back is formed.

Next, a drive control circuit for the motor 10 shown in FIG. 13 will be explained.

Now, the power supply voltage V _DD is applied to the output terminal of the Hall element 29 via a resistor R1, and the output terminal is connected to the base of the transistor TR1 via a resistor R2. When the permanent magnet 28 approaches, that is, when it senses that the movable thread 22 has come to the left position, the Hall element 29 outputs an L level signal to the base of the transistor TR1. Resistor R3 is connected to the collector of transistor TR1.
Supply voltage V _DD is applied through the transistor
The emitter of TR1 is grounded. Further, the collector of the transistor TR1 is connected to the stop switch 77, the switch 74a of the stage total 74, and the base terminals of the transistor TR2 and transistor TR3 which are connected in Darlington via the stop switch 77, the switch 74a of the stage total 74,
The output terminal of is grounded via a resistor R4.
Therefore, when the Hall element 29 senses the permanent magnet 28 of the clue 22 while the stop switch 77 and the switch 74a of the stage number counter 74 are closed, the transistor TR1 is turned off.
Resistors R3 and R are connected to the base terminal of transistor TR2.
4, and when the Hall element 29 is not sensing the permanent magnet 28 of the clue 22, the transistor TR1 outputs the H level signal set by the resistor R1,
It is turned on by the self-bias by R2 and outputs an L level signal to the base terminal of transistor TR2. Note that when the stop switch 77 and the switch 74a of the stage number counter 74 are open, the base terminal of the transistor TR2 is at L level regardless of whether the transistor TR1 is on or off.

The power supply voltage is applied to the collector terminals of the transistors TR2 and TR3 through the resistor R7 and the normally closed switch 81a of the thread breakage detection switch 81.
V _DD is applied, and the emitter terminal is connected to the collector terminal of a transistor TR6, which will be described later.
Then, transistor TR2 and transistor
TR3 has an H level signal output to its base terminal, and transistor TR5 and transistor
It turns on when TR6 turns on. A motor 10 is connected between the power supply voltage V _DD and the emitter terminal of the transistor TR3, and a diode D1 for protecting the transistor TR2 and the transistor TR3 is connected between the collector and emitter of the transistor TR3.

The thyristor SCR, which acts as a switch for turning on and off transistors TR5 and TR6, has its anode terminal applied with the power supply voltage V _DD via a resistor R15, and its cathode terminal connected to the base terminal of the transistor TR5 via a resistor R12. At the same time, it is grounded via a resistor R11, and the base potential of the transistor TR5 is set. The power supply voltage V _DD is applied to the gate terminal of the thyristor SCR via a resistor R9, a start switch 76, and a resistor R8, and a resistor R
10, and the power supply side terminal of the start switch 76 is grounded through a capacitor C1. When the start switch 76 is open, the positive terminal of the capacitor C1 is connected to the power supply voltage.
When the starting _switch 76 is closed from this state, a gate voltage is applied to the gate terminal of the thyristor SCR by the discharge current of the capacitor C1 and the resistors R9 and R10, and the thyristor SCR is turned on. , resistance R1
2 and the resistor R11, the base terminal of the transistor TR5 becomes H level.

The emitter terminal of the transistor TR6 is grounded via a resistor R13, and a protective diode D2 is connected between the collector and emitter. And transistor TR5 and transistor TR
6, the thyristor SCR conducts and the transistor
When an H level signal is output to the base terminal of the TR 5, the TR 5 is turned on, and the motor 10 is driven by the collector current.

The comparator comp1 has its positive terminal connected to the emitter of the transistor TR3 via a diode D3, and is grounded via a voltage setting resistor R16. Note that a capacitor C4 for noise prevention is connected in parallel to the resistor R16. comparator
A reference voltage set by resistors R22 and R14 and a reference voltage setting power supply V _SS is applied to the negative terminal of comp1, and the output terminal is connected to the anode terminal of the thyristor SCR. When the voltage at the positive terminal becomes lower than the voltage at the negative terminal, this comparator comp1 outputs an L level signal to the output terminal to turn off the thyristor SCR which is in the on state. .

The negative terminal of comparator comp2 is resistor R.
17 to the emitter of the transistor TR6, and is also grounded via a capacitor C3. A reference voltage set by resistors R20 and R21 and the power supply V _SS is applied to the positive terminal of the comparator comp2, and the output terminal of the comparator
Like comp1, it is connected to the anode of thyristor SCR. Then, when the potential of the negative terminal becomes higher than the potential of the positive terminal, the comparator
comp2 outputs an L level signal to the output terminal,
The thyristor SCR, which is in the on state, is turned off. Note that a capacitor C2 connected in parallel to the resistor R21 stabilizes the reference voltage of the comparator comp2, a resistor R19 is an input resistor at the positive terminal, and a resistor R18 is a feedback resistor.

Now, before starting up, this circuit is supplied with the power supply voltage V _DD
When , capacitor C1 is gradually charged,
Its positive terminal voltage is approximately equal to the power supply voltage V _DD . When the start switch 76 is closed in this state, a gate voltage is applied to the thyristor SCR, and the thyristor SCR is turned on. The transistors TR5 and TR6 are turned on at the same time as the thyristor SCR is turned on, and the motor 10 is driven by their collector currents.

Under the above motor operating conditions, the comparator
comp1 has a transistor on its positive input terminal.
Since a voltage corresponding to the sum of voltage drops across TR6 and resistor R13 (actually about 2.1V) is applied, it becomes higher than the reference voltage (0.4V) at the negative terminal, and an H level signal is output from the output terminal. do.
Also, since the voltage drop (0.6V) of the resistor R13 is applied to the negative input terminal of the comparator comp2,
The voltage becomes lower than the reference voltage (1.2V) of the positive input terminal, and an H level signal is output from the output terminal. Therefore, if the start switch 76 is closed, the motor 10 will continue to be driven.

Furthermore, if the motor 10 is overloaded or cannot rotate when the start switch 76 is closed, a large collector current flows through the transistor TR6, increasing the voltage drop across the resistor R13. Therefore, the input terminal voltage of the comparator comp2 is reversed from the above, and the output terminal becomes L level. When the output terminal of the comparator comp2 becomes L level, the power supply voltage V _DD is no longer applied to the anode of the thyristor SCR, and the start switch 76 is closed to the gate of the thyristor SCR, and the capacitor C
After 1 is discharged, sufficient gate voltage is no longer applied. Therefore, when the motor 10 is overloaded when the start switch 76 is closed, the overload current flowing through the motor 10 is momentarily cut off.
Burnout of the motor is prevented.

On the other hand, even if the Hall element 29 detects the permanent magnet 28 of the clue 22 during operation of the motor 10, as long as the stop switch 77 and the switch 74a of the stage number meter 74 are open, the base terminal of the transistor TR2 is always at the L level. Therefore, the transistor TR2 and the transistor TR3 are in an off state.

Then, when the knitting yarn supplied to the movable yarn port 22 becomes absent due to breakage or the like and the normally closed switch 81a of the yarn breakage detection switch 81 is opened, the power supply voltage V applied to the motor 10 is _DD is momentarily cut off, and the positive input terminal of the comparator comp1 becomes approximately OV and becomes lower than the reference voltage of the negative input terminal, so the output terminal of the comparator comp1 becomes L level. Then, the thyristor
At the same time as the SCR is turned off, transistors TR5 and TR6 are turned off, and the motor 10 stops while rotating by inertia. To restart this, it is necessary to close the activation switch 76 again.
Therefore, the motor 10 is stopped when the power supply voltage V is momentarily cut off due to thread breakage, and the motor 10 is not automatically restarted when the power supply voltage is restored.

Next, when the stop switch 77 is closed during motor operation, when the Hall element 29 detects the L level, that is, the left position corresponding to the permanent magnet 28 of the movable thread head 22, the transistor TR1 is turned off and the transistor TR2 An H level signal is output to transistor TR2 and transistor TR3.
turns on. Then, the collector currents of transistor TR3 and transistor TR6 increase and resistor R
13 becomes high, the output voltage of the comparator comp2 becomes L level, and the thyristor SCR is turned off. By turning off the thyristor SCR,
Transistor TR5 and transistor TR6 are also turned off. Then, since only the transistors TR2 and TR3 are turned on, both terminals of the motor are almost short-circuited, and the motor 10 is instantly stopped by regenerative braking. Therefore, when the stop switch 77 is operated, the motor 10 is moved with the movable thread 22 located at the left position on the carriage.
will definitely be stopped.

Also, as the carriage 5 moves back and forth, the number of stages increases to 7 in total.
Even when the number of knitting stages set to 4 is subtracted and the value becomes 0 and the switch 74a is closed, the movable thread port 22 acts in the same way as when the stop switch 77 is closed, and the movable thread port 22 The motor 10 is instantaneously stopped by regenerative braking in the left position.

In this way, when the movable yarn opening 22 is placed at the left position on the carriage 5, it is possible to replace the knitting yarn or to solve problems such as poor hook connection between the sub-knitting needle 21 and the knitting needle 2. Various operations can be easily carried out without being bothered by the sub-knitting needles 21 or the corner portions Ka of the cover K.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the configuration of each part can be changed and embodied as desired without departing from the spirit of the invention.

Effects of the Invention As detailed above, the present invention stops the operation of the movable thread when the stop switch is operated, while the movable thread has moved to one of the predetermined movement end positions of the left and right movement range. This allows customary knitting yarn switching operations to be carried out at a predetermined location at any time of knitting without any confusion, and furthermore, there is no carriage structure on the front side of the carriage that would be a nuisance to the knitting yarn switching operations. This provides an excellent effect in that, if there are any parts, the stopping position of the movable thread can be set on the side that avoids them.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing a part of the needle bed and carriage of a knitting machine embodying the present invention, Figs. 2 and 3 are partial front views of the carriage showing the operating state of Fig. 1, and Fig. 4. 6 is a bottom view of the carriage, FIG. 5 is a partial plan view of the carriage showing the drive transmission structure from the motor to the cam wheel, FIGS. Figure 7 is a partial rear view of the carriage showing the carriage drive direction changing means, Figures 8a and b are partial rear views of the carriage showing the operating state of Figure 7, and Figure 9 is a plane view of the carriage with the cover attached. Figure 10 is a partial plan view of the carriage with the cover removed; Figure 11 is a partial plan view of the carriage with the cover removed;
The figure is a cam diagram of the main cams on the cam wheel, Figure 12 1
14a to 12 are partial plan views of the knitting machine sequentially showing operations during surface knitting, and FIGS. 12 1b to 12 1
4b is a partial side view, and FIG. 13 is a circuit diagram showing a motor drive control circuit. Needle bed 1, knitting needles 2, hook 2a, carriage 5, cam ring 6, yarn head moving cams 9a, 9b, motor 10 as a drive device, sub knitting needle 21, hook 11a, movable yarn head 22, support member 23, signal generating means. Permanent magnet 28 and Hall element 29, stop switch 77, and transistor as a first control element
TR1, transistor TR as second control element
2, TR3.

Claims (1)

[Claims] 1. The carriage 5 installed on the needle bed 1 has a support member 23 that can move in the left-right direction within a certain range, and a support member 23 that is integrally formed with the support member 23 and moves in the left-right direction. The support member 23 is movably supported, and moves in the left and right direction above the hooks 2a, 21a of the knitting needles 2, 21 as the support member 23 moves in the left and right direction during stitch knitting.
In a knitting machine equipped with a movable yarn opening 22 for supplying knitting yarn into a knitting machine, the carriage 5 is rotatable around one axis, and the rotation causes the support member 23 to be rotated.
A clue moving cam 9 for moving the
a, 9b, a drive device 10 for rotating the cam wheel 6, a stop switch 77 for stopping the drive operation of the drive device, and a support member 23 that has a horizontal movement range. Signal generating means 28 and 29 that generate electric signals when moving to one of the moving end positions, and the signal generating means 2
8, 29 and a stop switch 77, and outputs an electric signal via the stop switch 77 only when an electric signal is generated from the signal generating means 28, 29 with the stop switch 77 closed. 1 control element TR1, and a second control element that is activated by an electric signal outputted through the stop switch 77 and stops the drive device 10.
A knitting machine characterized by being equipped with TR2 and TR3.