JPH02459Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention (industrial application field) This invention relates to a yarn feeding device for a knitting machine.

(Prior Art) In a conventional yarn feeding device of a knitting machine, knitting yarn is supplied through a knitting yarn tension applying device, a yarn take-up spring, etc. to a yarn feeding port of a carriage that is installed on a needle bed so as to be able to slide from side to side. When the carriage is folded back and slid on the left and right sides of the knitting area, the slack that occurs in the knitting yarn is absorbed by the expansion of the yarn take-up spring.

However, in this conventional knitting machine, when the carriage is turned back and slid on the left and right outside of the knitting area on the needle bed and starts knitting again from the end of the knitting area,
As mentioned above, the yarn take-up spring absorbs the slack in the knitting yarn and is in an elongated state, and the yarn take-up force is weakened, so especially when the stitches of several stitches at the start of knitting are larger than the preset stitch size. There was a problem with the size of the size.

By the way, there is a technique disclosed in Japanese Patent Publication No. 38-13927 as a technique for absorbing slack in the knitting yarn on the left and right outer sides of the knitting area. This device includes a carriage that is slidable left and right on the needle bed, and a first roller that is integrally rotatably connected to a roller that is in constant pressure contact with the frame of the needle bed and that can move within a certain range in the left and right direction. A second roller rotates at a fixed position near the first roller, and is movable within a certain range in the left and right direction near each of the first and second rollers, and is connected to the knitting yarn paid out from the knitting yarn source. A third roller having a mating annular groove, a spring that always biases the third roller to be in pressure contact with the second roller, and a yarn feeder that supplies the knitting yarn that has passed through the third roller to the knitting needles. We are prepared. Then, while the carriage slides from inside the knitting area to the folded position outside of the knitting area, the third roller maintains a position separated from each of the first and second rollers against the biasing force of the spring. As the knitting yarn is consumed for knitting, the knitting yarn that is paid out from the knitting yarn source moves and is rotated in the feeding direction and guides the knitting yarn, and then, when the carriage is folded back and slid, The third roller
By engaging with the roller directly or through a second roller, the knitting yarn is rotated in a direction opposite to the direction in which the knitting yarn is paid out, thereby removing slack in the knitting yarn between the ends of the knitted fabric, and , the time when the carriage has just entered the knitting area and knitting yarn is supplied from the yarn feeder to the knitting needles at the end of the knitting area and stitch knitting is started, i.e.
Since the knitting yarn starts to be consumed during knitting, the third roller is pulled toward the yarn feeder against the biasing force of the spring due to the knitting yarn being pulled toward the yarn feeder. is spaced apart from either of the first and second rollers, and this condition is maintained until the carriage is slid beyond the knitting area to the opposite outward folding position, and during this period, as described above, The third roller is rotated in the feeding direction by the movement of the knitting yarn fed out from the knitting yarn source, and guides the knitting yarn.

(Problem to be Solved by the Invention) However, according to the latter conventional method, the carriage is folded back and slid on the left and right sides of the knitting area and returned to the end position of the knitting area. , the third roller can be rotated in the opposite direction to the direction in which the knitting yarn is fed out to eliminate the slack in the knitting yarn between the ends of the knitted fabric, while the knitting yarn is supplied to the knitting needles at the ends of the knitting area to knit stitches. When starting, the knitting yarn is pulled toward the yarn feeder side as the knitting yarn is consumed.
The roller resists the biasing force of the spring and separates from the first and second rollers, and the rotational drive by the first roller is completely cut off, stopping the picking-up action of the knitting yarn in the direction opposite to the direction in which it is fed out. For this reason, from the time a stitch is knitted on the knitting needles at the end of the knitting area until the knitting is completed over the entire knitting area, some slack remains in the knitting yarn, or some slack may newly occur. In some cases, it has been pointed out that this slack cannot be removed accurately, and if knitting is done in this state, the stitch sizes may be uneven.

Also, when the carriage is folded back and slid on the left and right outside of the knitting area, the first roller and the third roller are moved in the left and right direction, and the third roller is directly connected to the first roller, or the second roller Since a contact/separation type rotation transmission cut-off mechanism is used, which connects the three rollers through a It is attached.

Furthermore, since the above-mentioned approach-separation type rotation transmission cutoff mechanism is adopted, the rotation transmission action of the three rollers tends to become unstable when the carriage is folded back, and failure may occur after long-term use. There are disadvantages such as being easy to remove and lacking in durability.

However, in this invention, even after absorbing the slack of the knitting yarn by folding and sliding the carriage on the left and right outside of the knitting area, the knitting yarn is actively applied a force in the pick-up direction to the knitting yarn. By constantly applying tension to the knitting area, it is possible to reliably prevent the stitches from increasing in size by several stitches at the knitting start part at the end of the knitting area, and to ensure that the stitch size is uniform throughout the subsequent knitting area. By making it possible to knit the knitted fabric, and by driving the rotating body using a cam wheel for operating the knitting needles and a motor as its drive source,
There is no need to specially provide a dedicated drive source, which simplifies the device and reduces manufacturing costs.Furthermore, the rotary shaft is pressed from above by a leaf spring, so that the rotation transmission wheel is always placed on the top surface of the cam wheel. By press-contacting the rotation transmission ring and the cam ring, slippage between the rotation transmission ring and the cam ring is reliably prevented, rotation transmission from the cam ring to the rotating body is always carried out almost positively, and slack in the knitting yarn is reliably absorbed. The purpose of this invention is to maintain the tension of the intermediate knitting yarn stably at all times from the start to the end of knitting.

Structure of the invention (means for solving the problem) In order to achieve the above object, this invention transfers the knitting yarn T paid out from the knitting yarn source to the knitting needles in a carriage 4 movably installed in the needle bed 1. 2, 19, and an annular groove 35 that engages the knitting yarn T.
a, and is provided on the front side of the yarn feeder 20 so as to rotate in the opposite direction to the direction in which the knitting yarn T is fed out. In a yarn feeding device equipped with a rotatable yarn pressing member 40 that presses the yarn T into the groove 35a,
The carriage 4 includes a cam ring 5 having a needle actuating cam for moving the knitting needles 2, 19 between the knockover position and the flattening position, and a motor 6 for constantly rotating the cam ring 5 in one direction. Yarn feeder 2
0 and the support boss 32 above between the cam wheel 5
A support plate 31 fixed on the top and having a bearing groove 31a opening downward at the bottom, and the support plate 31
The rotary body 35 is rotatably supported in a bearing groove 31a of the rotor, and the rotary body 35 is fixed to a portion corresponding to the upper side of the yarn feeder 20 at one end thereof, and to a portion corresponding to the upper side of the cam ring 5 at the other end. The rotating shaft 34 to which the rotation transmission wheel 36 is fixed is pressed from above so that the rotating body 35 rotates in a direction opposite to the direction in which the knitting yarn T is fed out in conjunction with the rotation of the cam ring 5. The rotation transmitting wheel 36 is always brought into pressure contact with the upper surface of the cam wheel 5 by a leaf spring 37.

(Function) In the knitting machine of this invention, the knitting yarn T is pushed into the concave groove 35a of the rotating body 35 by the pressing force of the yarn presser member 40.
In the state in which the rotating body 35 is pressed inward, the rotating body 35, which is interlocked with the rotation of the cam ring 5, is rotated in a direction opposite to the direction in which the knitting yarn T is fed out.
A tension force is always applied to the knitting yarn T running toward zero in the direction opposite to the direction in which it is fed out. Therefore, when the carriage 4 turns back and slides outside the predetermined knitting area, it is possible to reliably absorb the slack that occurs in the knitting yarn T, and also to absorb the slack in the knitting start portion at the end of the predetermined knitting area on the needle bed 1. It is possible to reliably prevent the stitches from becoming too large for several stitches, and to knit a fabric with uniform stitch sizes over the entire subsequent knitting area.

(Example) Hereinafter, an example of this invention will be described in detail with reference to the drawings.

As shown in FIG. 2, a large number of knitting needles 2 and comb teeth 3 are arranged alternately on a needle bed 1 of this knitting machine. A knitting carriage 4 is disposed on the needle bed 1 so as to be movable in the left-right direction. 4th and 5th
As shown in the figure, a plurality of cam wheels 5 are provided on the carriage 4 so as to be integrally rotatable.
A large number of control cams such as a carriage feed cam and a needle operation cam are formed on the upper and lower surfaces of the cam. A motor 6 is mounted on the carriage 4, and a plurality of gears 7, 8,
The cam ring 6 is rotated clockwise in FIG. 4 via the cam wheels 9, 10, 11, and 12.

As shown in FIG. 3, at the rear of the carriage 4, there is a tooth body 13 that can be engaged with and detached from a rack (not shown) on the needle bed 1.
A carriage feeding device 13 having a structure such as a is provided. Then, while the cam ring 5 is rotated once, the tooth body 13a of the carriage feed device 13 is engaged with and disengaged from the rack by the action of the control cam on the cam ring 5. The gear 13a is biased to move in the lateral direction by the action of the carriage feed cam, and the tooth 13a is engaged with the gear 13a.
When a moving force is applied to the carriage 4, the carriage 4 is moved one pitch of the row knitting needles 2 to the right or left.

As shown in FIG. 3, a butt passage 14 is formed on the lower surface of the carriage 4 for guiding the butt 2b of the knitting needle 2 which is in the operating position on the needle bed 1.
A guide body 15 is disposed at the center of the lower surface of the carriage 4 in front of the butt passage 14, and a butt guide groove 16 is formed in the center thereof, communicating with the butt passage 14 and extending in the front-rear direction. Guide body 1
A needle actuating body 17 is supported on the needle bed 1 so as to be movable in the front-rear direction, and a needle actuating body 17 is supported on the needle bed 1 at the rear end thereof, which is guided along the butt passage 14 to the rear of the butt guide groove 16.
A butt clamping portion 17a is formed to clamp the butt 2b of the book knitting needle 2 from the front and back. As the cam ring 5 rotates, the needle actuating body 17 is moved back and forth by the action of the machine's needle actuating cam on the cam ring 5, and one knitting needle 2 on the needle bed 1 is temporarily brought to the flattening position. After being advanced, it is designed to be retreated to the rear of the knockover position.

An opposing needle support 18 is supported at the front of the carriage 4 so as to be movable back and forth.
The opposite needle 19 of the book is attached to the hook 19a of the knitting needle 2.
It is rotatably supported in a state where it is opposed to the hook 2a. As the cam ring 5 rotates, the opposing support 18 is moved back and forth by the action of the opposing needle operating cam on the cam ring 5, and the opposing needle 19 is attached to one knitting needle 2 on the needle bed 1 from the front. They are designed to move forward and backward between the bellow release position and the knock-over position while facing each other. Moreover, the cam wheel 5
When rotating, the counter needle 19 is rotated by the action of a predetermined control cam on the cam ring 5, and both knitting needles 2,
As the 19 hooks 2a, 19a are connected and moved, the stitches are transferred.

As shown in FIGS. 1 to 5, a yarn feeder 20 is supported on the carriage 4 via a support member 21 so as to be movable in the left-right direction. As the cam wheel 5 rotates, the support member 21 is moved left and right by the action of the control cam on the cam wheel 5 via the operating lever 22 shown in FIG. The hooks 2a, 19a of the knitting needles 2 on the needle bed 1 or the opposite needles 19 on the carriage 4 are moved in the left-right direction.
Knitting yarn T is supplied to a and 19a.

Therefore, in this knitting machine, when back stitch knitting for rubber knitting is performed, for example, each time the carriage 4 is advanced on the needle bed 1 as the motor 6 rotates, the row of knitting needles is One of the two knitting needles 2 is once advanced to the slip-off position, and knitting yarn T is supplied to the hook 2a from the yarn feeder 20. Then, the knitting needle 2 is retreated to the back of the knock-over position, and the stitch is finished. Organized. In addition, when knitting the front stitch for rubber knitting, each time the carriage 4 is advanced on the needle bed 1 as the motor 6 rotates, one of the rowed knitting needles 2 is Hook 2 of knitting needle 2 and opposing needle 19
a, 19a are combined, and knitting needle 2 to opposing needle 19
The stitch is transferred to , and then the opposite needle 19 is advanced to the flattening position, and the yarn feeder 2 is attached to the hook 19a.
After the knitting yarn T is supplied from the knitting needle 2, the opposing needle 19 is moved back to the knockover position to knit a stitch, and the hooks 2a of the knitting needle 2 and the opposing needle 19 are
19a are combined, and the knitting stitches are transferred from the opposing needles 19 to the knitting needles 2.

Next, the configuration of a yarn feeding device for guiding the knitting yarn T to the yarn feeding port 20 will be explained with reference to FIG. 1 and FIGS. 4 to 6.

Now, above the cam wheel 5, the carriage 4
A mounting plate 30 is disposed on the top, and a through hole 30a is formed in the center of the front part of the mounting plate 30. On the mounting plate 30 in the vicinity of the through hole 30a, a support plate 31 having a substantially U-shaped side surface is provided with a screw 3 through a pair of support bosses 32.
3, and as shown in FIG. 1, a bearing groove 31a that opens downward is formed from the bottom wall to both side walls. A rotary shaft 34 is rotatably and vertically movably supported within the bearing groove 31a of the support plate 31 so as to extend in the front-rear direction orthogonal to the traveling direction of the knitting yarn T to the yarn feeder 20.

A rotating body 35 made of synthetic resin is fixed to the front end of the rotating shaft 34, and a groove 35a that engages with the knitting yarn T is formed on the outer peripheral surface of the rotating body 35. A rotation transmission ring 36 made of rubber is fixed to the rear end of the rotating shaft 34, and its outer peripheral surface protrudes downward through the through hole 30a of the mounting plate 30 and comes into contact with the upper peripheral edge of the upper cam ring 5. are doing. A leaf spring 37 is fastened and fixed on the support plate 31 by the screws 33, and its tip presses the rotating shaft 34 downward to bring the rotation transmission ring 34 into pressure contact with the upper surface of the cam ring 5. In this embodiment, the carriage drive motor 6 serves as a drive source, and the motor 6 drives the fourth cam wheel 5.
When rotated clockwise in the figure, the rotation transmission wheel 34 is driven to rotate in the clockwise direction in FIG. It's becoming like that.

On the left side of the rotation shaft 34, between both side walls of the support plate 31, there is a rotation lever 3 having a substantially inverted U-shaped side surface.
8 is rotatably supported by a support shaft 39, and a projecting piece 38a is provided at the lower part of the front wall thereof. On the front side of the front side wall of the rotary lever 38, a thread presser member 40 made of synthetic resin is attached to the rotating body 35 by a support shaft 41.
As shown in FIGS. 1 and 4, a part of the outer periphery engages with the outer groove 35a of the rotating body 35, and the knitting yarn T is It is pressed against the groove 35a of the rotating body 35.

On the right side of the support plate 31, on the mounting plate 30, an adjustment lever 42 is rotatably supported at its rear end by a support shaft 43, and an operating portion 42a is provided at its front end, and an adjustment lever 42 is provided on the lower surface of the approximately central portion. An engaging protrusion 42b is formed in the. A plurality of engagement holes 44 are formed on the mounting plate 31, and the engagement protrusions 42
b is selectively engaged to hold the adjustment lever 42 in a predetermined rotational position. A coil spring 45 is locked at both ends between the projecting piece 38a of the rotary lever 38 and the adjustment lever 42, and urges the rotary lever 38 to rotate in the counterclockwise direction in FIG. The holding member 40 is pressed against the rotating body 35. In this embodiment, the coil spring 45 and the adjustment lever 42 constitute a pressing force adjustment member 46, and by adjusting the rotation of the adjustment lever 42, the coil spring 45 is expanded or contracted, and the thread presser member 46 is pressed against the rotating body 35. The pressing force of 40 can be adjusted.

Therefore, when knitting this knitting machine, the coil spring 4
With the knitting yarn T being pressed against the outer groove 35a of the rotating body 35 due to the pressing force of the yarn pressing member 40 based on the action of 5, the rotating body 3 is pressed as the cam ring 5 rotates.
5 is rotated clockwise in FIG. 1, and a tension force is applied to the knitting yarn T running toward the yarn feeder 20 in the opposite direction to the direction in which it is fed out. Therefore, even when the carriage 4 is turned back and slid on both sides of a predetermined knitting area on the needle bed 1 and knitting starts again from the end of the knitting area, the stitches of the knitting start part are set in advance. The size of the stitches does not become larger than that of the previous stitches, and a knitted fabric with uniform stitch sizes can be knitted.

Furthermore, since the rotating body 35 is driven using the cam wheel 5 for operating the knitting needles and the motor 6 as its drive source, there is no need to provide a dedicated drive source, which simplifies the device and facilitates manufacturing. Cost reduction can be measured.

Furthermore, by pressing the rotary shaft 34 from above with the leaf spring 37 to keep the rotation transmission ring 36 in constant pressure contact with the upper surface of the cam ring 5, slipping between the rotation transmission ring 36 and the cam ring 5 can be reliably prevented. cam wheel 5
Since the rotation is now transmitted substantially positively from the knitting yarn T to the rotating body 35, the tension of the intermediate knitting yarn T is constantly maintained from the start to the end of knitting, after the slack in the knitting yarn is reliably absorbed. Can be maintained stably.

In addition, when the thickness or type of the knitting yarn T used for knitting changes, the pressing force of the yarn presser member 40 against the rotating body 35 can be adjusted by rotating the adjustment lever 42 to expand and contract the coil spring 45. can be changed, and an appropriate tension can always be applied to the knitting yarn T depending on the thickness and type of the knitting yarn T.

It should be noted that this invention is not limited to the configuration of the above-mentioned embodiments, and it is also possible to embody the invention by changing the configuration of each part arbitrarily within a range that does not depart from the spirit of this invention.

Effects of the device As detailed above, this device actively applies force in the pick-up direction to the knitting yarn even after absorbing the slack in the knitting yarn by folding and sliding the carriage on the left and right outside of the knitting area. By applying tension to the knitting yarn at all times, it is possible to reliably prevent the stitches from becoming larger at the beginning of knitting at the end of the knitting area, and also to prevent the stitches from becoming larger at the knitting start part at the end of the knitting area. It exhibits the excellent effect of being able to knit a knitted fabric with uniform stitch sizes.

In addition, by driving the rotating body using a cam wheel for operating knitting needles and a motor as its drive source, there is no need to provide a dedicated drive source, which simplifies the device and reduces manufacturing costs. It also has the effect of allowing you to.

Furthermore, by pressing the rotating shaft from above with a leaf spring and keeping the rotation transmission ring in constant pressure contact with the top surface of the cam ring, slippage between the rotation transmission ring and the cam ring is reliably prevented, and the rotation is always transferred from the cam ring to the rotating body. Since the rotation transmission is almost positive, the tension of the intermediate knitting yarn can be maintained stably at all times from the start to the end of knitting after the slack in the knitting yarn is reliably absorbed. There is also.

[Brief explanation of the drawing]

Figure 1 is a partial front view of the carriage showing the configuration of the yarn feeding device in a knitting machine embodying this idea;
The figure is a partially cutaway side view showing the entire needle bed and carriage of the knitting machine, and Figure 3 is a bottom view of the carriage.
FIG. 4 is a partial plan view of the carriage showing the yarn feeding device;
FIG. 5 is a partial cross-sectional view taken along line A-A in FIG.
FIG. 6 is a partial sectional view taken along line B--B in FIG. 4. DESCRIPTION OF SYMBOLS 1... Needle bed, 2, 19... Knitting needle, 4... Carriage, 5... Cam wheel, 6... Motor, 20... Yarn feeder, 31... Support plate, 31a... Bearing groove, 32...
... Support boss, 34 ... Rotating shaft, 35 ... Rotating body,
35a...concave groove, 36...rotation transmission wheel, 37...
Leaf spring, 40... Thread pressing member, T... Knitting yarn.

Claims (1)

[Claims for Utility Model Registration] A carriage 4 movably installed on the needle bed 1,
It has a yarn feeder 20 that supplies the knitting yarn T paid out from the knitting yarn source to the knitting needles 2 and 19, and an annular groove 35a that engages with the knitting yarn T, and is opposite to the direction in which the knitting yarn T is paid out. A rotary body 35 provided on the front side of the yarn feeder 20 so as to rotate in the direction, and a concave groove 3 of the rotary body 35
5a to press the knitting yarn T into the concave groove 35a. A cam wheel 5 having a needle actuating cam for moving the needle between the two, a motor 6 that always rotates the cam wheel 5 in one direction, and a support boss 3 located above between the yarn feeder 20 and the cam wheel 5.
2, and a support plate 31 having a bearing groove 31a opening downward at the bottom thereof, and the support plate 3
The rotating body 35 is rotatably supported in the bearing groove 31a of the first bearing groove 31a, and the rotating body 35 is fixed to a portion corresponding to the upper side of the yarn feeder 20 at one end thereof, and a portion corresponding to the upper side of the cam ring 5 at the other end. rotation transmission wheel 36
The rotation is transmitted by pressing the rotating shaft 34 from above so that the rotating body 35 rotates in a direction opposite to the direction in which the knitting yarn T is fed out in conjunction with the rotation of the cam ring 5. The wheel 36 is always the cam wheel 5.
A yarn feeding device for a knitting machine, comprising a leaf spring 37 that is brought into pressure contact with the upper surface of the knitting machine.