JPH0913251A - Yarn guide device for flat knitting machine - Google Patents

Abstract

PURPOSE: To avoid the collision of mutual members when performing needle bed racking by advancing and retreating plural yarn pressing members by operations of operating means, guiding each yarn to a hook of a needle and evacuating the yarn pressing members without receiving operating actions. CONSTITUTION: This yarn guide device 33 of a flat knitting machine is obtained by arranging the yarn guide device 33 comprising yarn pressing members 35 under at least front and rear oppositely arranged needle beds FB and BB, each supporting bed 26 therefor and operating means 28 for the members 35, providing a control pad 37 for engaging with cams of the operating means 28, advancing and retreating the members 35 and stopper pads 38 for regulating the advance upper limit positions of the members 35 in grooves 25 in front edges of the yarn pressing members 35 and further installing operating surfaces 36 comprising slopes at the front ends in a flat knitting machine. Each yarn 51 is pushed down to a position enabling the capture with a hook of each needle 8 and surely guided into the hook. When the yarn pressing members 35 are not operated, the members are evacuated through evacuating means comprising an elastic member such as a coil spring 43.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a yarn guide device for guiding a yarn supplied to a needle in a flat knitting machine to a predetermined position on the front surface or the back surface of the needle.

[0002]

2. Description of the Related Art A sinker is used in a flat knitting machine as a means for holding and holding a loop formed by operating a needle. The sinkers are located between the needles arranged in multiple rows, and the sinkers are positioned to swing backward when the needles are raised and retracted. It is designed to be caught by the hook by the backward movement of. Then, after the stitches are formed by the needles, the operation of swinging the sinker forward to cover the needle bed gap is repeated for each needle and knitting is performed. As the above-mentioned device, there is one described in JP-A-62-223348. With this device, when the yarn is caught by the needle that is first supplied, the yarns that are supplied from the yarn feeder can be sequentially pressed by the forward swinging motion of the adjacent sinker. It is possible to knit by floating a thread between the needles. However, in the above-mentioned case, when the yarn cannot be caught by the needle supplied first, the yarn cannot be pressed by the subsequent sinker, and the yarn cannot be caught by the needle. Also, the thread could not be guided to the back of the needle.

In view of the above points, the applicant of the present invention ensures that the yarn supplied from the yarn feeder is hooked to the hook of the needle to be knitted even when the yarn is floated between a large number of needles. Guides or guides the yarn supplied from the yarn feeder or the yarn that is hung between the already knitting needles to a predetermined position on the back side of the needle that is going to perform the knitting operation, and inlay knitting or special Invented is a yarn guide device for a flat knitting machine having a yarn guide member that enables intarsia knitting or the like. This invention is disclosed in Japanese Patent Application No. 6-113892 in the name of the present applicant.
No. 7-107911.

In the yarn guiding device of the above application, the yarn pressing member is controlled to move back and forth by a control cam as an operating means provided on the carriage, and after the carriage has passed, the yarn pressing member has a tooth opening. The position is set back from the center line. It may be moved during the maintenance work of the knitting machine such as needle replacement work, and the knitting machine may be operated without being set in the proper position. Could collide and damage the knitting machine.

[0005]

SUMMARY OF THE INVENTION The present invention has been devised in view of the above-mentioned problems, and has been described above by retracting the thread pressing member to a predetermined position even when it is not affected by the operation means. An object of the present invention is to provide a yarn guide device capable of preventing the occurrence of such an accident. It is another object of the present invention to provide a yarn guide device that can solve the above-mentioned problems regardless of the position of the carriage. In addition, Japanese Unexamined Patent Publication No.
For a flat knitting machine of the type in which the hook portion formed on the tip side of the sinker is elastically biased toward the lower side of the needle bed gap as disclosed in Japanese Patent Application Laid-Open No. 206161 or JP-A-6-33348, or Japanese Patent Application Laid-Open No. 1-57173 and Japanese Patent Application Laid-Open No. 5-173173
An object of the present invention is to provide a flat knitting machine having a yarn guide device of a more simplified structure by applying the yarn guide device of the present invention to the four-bed flat knitting machine disclosed in Japanese Patent Publication No. 25758. To do.

[0006]

In order to solve the above-mentioned problems, according to the present invention, at least a pair of front and rear needle beds are opposed to each other, and a large number of needles and sinkers are arranged on the needle bed. In the flat knitting machine, it can move back and forth beyond the center of the needle bed gap, and at the advanced position up to the action position where the yarn hooked from the yarn feeder to the needle at the tip end can be caught at least by the hook of the needle for knitting operation. A plurality of thread pressing members having an operation surface capable of being pushed down and an operation means for advancing the operation surface of the thread pressing member to the operation position are provided, and the thread pressing member is not affected by the operation means. Occasionally, a retracting means is provided for retracting the tip of the thread pressing member to a position where it does not exceed the center of the needle bed gap.

Further, an elastic member is disposed between the thread pressing member and a support portion for accommodating and supporting the thread pressing member, and the elastic member is elastically deformed by the relative movement of the thread pressing member and the supporting portion due to the advance of the thread pressing member. The elastic force generated at that time was used to construct the retracting means for the yarn pressing member.

Further, the elastic member also serves as an urging means for elastically urging the hook of the movable sinker downward in the tooth gap.

Further, the operating means is a thread holding member control cam arranged on a carriage reciprocating on a needle bed engageable with a control butt provided on the thread holding member.

Further, the advancing cam is connected to the driving means so as to be displaceable so that the yarn pressing member located immediately below the carriage can be retracted to the retracted position.

Further, the yarn pressing member control cam is provided with a retreating cam for retracting the yarn pressing member to a position further retracted from the retracted position by the retracting means, and a sliding resistance provided on the yarn pressing member at the retracted position. The application part was pressed against a part of the support bed.

Further, the yarn guiding device is a four-bed flat knitting machine in which an upper needle bed is further supported above a lower needle bed having a mountain-shaped top portion facing each other.

[0013]

The operating surface of the yarn pressing member is advanced by the operating means, and the yarn hooked from the yarn feeder to the needle is pressed to be caught by the hook of the needle for knitting operation or guided to the back side of the needle. The yarn pressing member is retracted to a predetermined position by retracting means provided on each yarn pressing member.

Further, even when the thread pressing member is advanced to the working position, it is retracted by the elastic force of the elastic member arranged between the thread pressing member and the supporting portion for accommodating and supporting the thread pressing member.

Further, since the elastic member of the thread pressing member also serves as the urging means of the movable sinker, the device can be simplified.

Further, even when the carriage is located on the needle bed, the yarn holding member control cam provided on the carriage side is switched to the inactive state by the driving means, so that the yarn holding member moves to a predetermined position by the action of the retracting means. Can be evacuated. As a result, even if the needle bed is racked, the yarn pressing members are prevented from colliding with each other.

Further, the sliding resistance applying portion provided on the yarn pressing member does not work at the time of the retreating operation by the retreating means, but only works at the time of the retreating operation of the retreating cam of the yarn holding member control cam after the yarn has passed through the carriage. The pressing member has a stable position.

[0018]

【Example】

<First Embodiment> A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows an enlarged plan view of the needle bed in a vertical cross section and in a partially cut-away state. In the flatbed knitting machine of this embodiment, the needle bed 1 has two heads, a front bed FB and a back bed BB, whose heads face each other in a chevron shape in the front and back with a virtual center plane V of a vertical needle bed gap as a center. It is provided. Since the needle beds 1 of the front bed FB and the back bed BB have the same structure, the structure of the needle bed 1 of the front bed FB will be described below.

A plurality of parallel needle plate grooves 2 are cut in the needle bed 1, a needle plate 3 is inserted, and an oblique recess 4 provided on the lower surface of the needle plate 3.
And the slanted recessed portion 5 provided on the upper surface of the needle bed 1 are combined, and the wire 6 is inserted into the recessed portion to fix them integrally by an appropriate method. As a result, the needle groove 7 is formed between the adjacent needle plates 3 and 3, and the needle 8 and the needle jack 9 and other selectors, select jacks and the like (not shown) are slidably inserted. The needle plate 3 has a height such that the control butt 10 of the needle jack 9 connected to the needle 8 inserted in the needle groove 7 between the needle plates 3 and 3 projects, and its shape is as shown in FIG. The upper edge of the protruding portion 12 with the head portion protruding upward serves as a support surface 13 of the thread guide device 33 described later, and the protruding portion 12 is provided with a rectangular hole 14 and a round hole 15. The needle 8
Is prevented from falling out of the needle groove 7 by a band 17 fitted into the needle plate 3 in a direction intersecting with the needle groove 7.
The needle 8 shown in the figure is a transfer needle provided with a blade 18 as a transfer member, but it may be either a spatula needle or a compound needle. A plurality of sinker grooves 19 are arranged side by side on the lower surface of the tip of the needle bed 1. A sinker 20 made of a V-shaped plate in a side view is fitted into the groove 19, and the base of the sinker 20 is engaged with a recess 22 provided on the lower surface of the needle bed 1 to move the sinker 20 into the needle bed. Fixed on top.
Reference numerals 23a and 23b denote wires inserted through the sinker 20. The wire 23a locks a knitted fabric loop that hangs down at the mouth part, and promotes knockover of the loop during knitting. Sinker 20
Is a fixed type, but may be a movable type that can move back and forth with respect to a tooth opening part as in a second embodiment described later.

Next, the yarn guide device 33 will be described. As shown in FIG. 1, the yarn guiding device 33 includes the needle beds F.
It is provided above B and BB, and the yarn can be reliably guided to a predetermined position by sandwiching the yarn by both devices 33 and 33, but when knitting is performed in a state where the yarn itself is given high tension or knitting When the speed is low, it is sufficient to use one of the yarn guiding devices 33. The yarn guiding device 33 includes a yarn pressing member 35, a yarn pressing member support bed 26 that supports the yarn pressing member 35, and an operating unit 28 that operates the yarn pressing member 35. The thread pressing member support bed 26 has a substantially T-shaped side surface, the upper horizontal portion 29 is placed on the support surface 13 of the protruding portion 12 of the needle plate 3, and the screw 31 of the vertical arm 30 extending downward is inserted. It is fixed to the protruding portion of the needle plate 3 by being screwed into the fixed beam 32 inserted through the hole 14.

In the thread pressing member support bed 26, the thread pressing member 35 is slidably inserted into a plurality of grooves 25 provided in the upper horizontal portion 29. Each groove 25 formed in the horizontal portion 29 is provided with a hole 42 communicating with the supporting surface of the needle plate 3, and one end of a coil spring 43 as a retracting means of a thread pressing member 35 described later is supported through the hole 42. It appears on the surface. The grooves 25 are provided at the same number as the pitch of the needle grooves 7, but the interval between the grooves 25 may be an integral multiple of the needle grooves, and the number of the grooves 25 may be smaller than the number of the needle grooves 7.

The thread pressing member 35 is an elongated plate member in the illustrated example, and the action surface 36 provided at the front end is projected forward on the upper side and retracted on the lower side on the virtual center plane V of the needle bed gap 24. The thread is guided to the inside of the hook of the needle 8 or the back surface of the needle 8 by making the thread an abutment surface, contacting the thread with the tilted surface 36, and advancing the thread pressing member 35. When the thread is guided into the hook of the needle 8, if the needle 8 is a spatula needle, the thread is located in the swirl locus of the spatula, the spatula is returned by the descending of the needle, and the thread is taken into the hook by the spatula. All you need is a thread. In the case of a compound needle, the thread may be in the hook closed by the slider. A control bat 37, a stopper bat 38, and a groove 2 in front of the stopper bat 38 are provided on the upper edge of the thread pressing member 35.
An arm 39 that extends toward the needle bed gap side is formed within 5. The control butt 37 engages with a cam provided on the operating means 28 to move the yarn pressing member 35 forward and backward, and the stopper butt 38 regulates the upper limit of the advanced position of the yarn pressing member 35 in the groove 25.
A projecting portion 39a is formed at the tip of the arm 39, and while the projecting portion 39a is located on the lower surface of the strip 44, the projecting portion 39a is in pressure contact with the strip 44 to reduce the sliding resistance of the thread pressing member 35 in the groove. Give. The lower surface of the thread pressing member 35 has a recess notch 40.
Is formed, one end 43a of the coil spring 43, which is inserted and supported by the wire 41 inserted through the insertion hole 15 formed in the needle plate 3, protrudes and can come into contact with the recess 40. Reference numeral 44 is a metal band for preventing the thread pressing member 35 from falling off the groove 25 and guiding it.

As described above, the thread pressing member 35 is slidably inserted into the groove 25 of the support bed 26. However, the number of the grooves 25 may be smaller than the number of the needle grooves 7 as described above. Since a general flat knitting machine can float a thread with a distance of about 1 inch between needles, if the purpose is only to float the thread, for example, in the case of a 7 gauge knitting machine, every seven needles are placed and the thread pressing member 35 is used. Should be placed. In addition, if the needle is placed at a specific position and the thread is passed or passed through the back surface, the thread pressing member may be arranged only at the location corresponding to the needle. When the needle on which the thread pressing member is to be operated changes in each course of knitting, the thread pressing member 35 may be arranged so as to cover the entire needle bed from the beginning. Also in this case, it is not always necessary to provide each needle.

A carriage 45 is provided on the upper surface of the needle bed 1 by a known means, and the needle manipulating cam 5 shown in FIG.
6 and a control cam 48 as an operating means 28 for the thread pressing member 35 is attached by an arm 46. The yarn pressing member control cam 48 includes a forward cam 49a and a backward cam 48.
The yarn pressing member control cam 48 is formed of a forward / backward moving cam having a cam groove 47 formed by b. The yarn pressing member control cam 48 engages the control butt 37 of the yarn pressing member with the cam groove 47 forming the cam peaks 48a and 48b, and the yarn pressing member 35. The thread pressing member support bed 26
It moves back and forth in the groove 25 of. The cam peaks 48a and 48b
Is the raising cam 5 of the steering cam 56 in the example shown in FIG.
Although it is provided above both slopes 2, it may be provided above one of the slopes in a simplified device. The thread holding member control cams 48a and 48b of this embodiment have cam ridges of the same height, and the working surface of the thread holding member at the top of the cam ridge has a height that can push the thread to the back side of the needle. Although it has a structure that can act on the traveling direction,
It is also possible to reduce the burden on the yarn when guiding the yarn to the hook by allowing the cam crest height to be switchably adjusted between when the yarn is eaten by the hook of the needle and when the yarn is pushed to the back surface of the needle. Further, at the foot of the cam, the yarn pressing member 35 retracts to a position where the protruding portion 39a formed at the tip of the arm 39 comes into contact with the band 44 on the support bed. Reference numeral 50 is a yarn feeder located substantially above the center of the needle bed gap, and the position (height) at which the yarn 51 is discharged is lower than the upper end of the action surface of the front end of the yarn pressing member.

The operation of the yarn guiding device of this embodiment will be described. A steering cam 56 having a raising cam 52, knitting cams 53 and 54, and a guide cam 55 shown in FIG.
And a carriage 45 having a thread holding member control cam 48
The case where the yarn is guided rightward and the yarn is guided to the back surface of the needle will be described. When guiding the yarn to the back side of the needle, the yarn pressing member control cam 48a located on the leading side in the traveling direction is used. As the carriage 45 moves to the right, the control butt 37 of the thread pressing member 35 slidably inserted in the thread pressing member support bed 26 is inserted into the cam groove 47 (see FIGS. 3 and 4). As the carriage continues to advance, the needle jack butt 10 passes through the lowermost position of the knitting cam 54, and the needle is kept at the generally previous position, and the control butt 37 of the yarn pressing member 35 engages with the cam mountain of the yarn pressing member control cam. Together, they rise and advance the yarn pressing member toward the needle bed gap 42. By the advance of the thread pressing member 35, the protruding portion 39a at the tip of the arm 39 is disengaged from the engagement with the band 44, and the sliding resistance in the groove of the thread pressing member 35 disappears.
At the same time, the recess 40 of the thread pressing member 35 is not
3, the coil spring 43 is deformed against the elastic bias. The yarn pressing member 35 advances at the same time on both the front bed side and the back bed side (see FIGS. 3 and 4).

The yarn supplied to the needle bed gap due to the advance of the yarn holding member 35 into the needle bed gap 42 is the action surface 3 of the yarn holding member.
6 is abutted against and is pushed down from both sides, and is located at the lowest position of the working surface 36. This position is below the rising trajectory of the rising needle. Next, the needle jack butt 10 raises the slope of the lasing cam 52 and raises the needle, but since the yarn is below the locus of the needle rise, the needle is raised by locating the yarn on the back surface of the needle and raising the needle. No thread is hung on the hooks (see FIGS. 3 and 4). With the subsequent movement of the carriage, the control bat 37 moves down the cam lobe by the retreating cam 49a and retreats to the initial position to position the thread on the back surface of the needle (in FIGS. 3 and 4). In this state, the protruding portion 39a of the arm 39 is pressed against and engaged with the band 44, so that the yarn pressing member 35 does not move in the groove.

Next, the case where the yarn is guided to the hook will be described. When guiding the yarn 51 to the hook, the yarn pressing member control cam 48b located on the trailing side in the traveling direction is used. The operation of the arm 39 and the coil spring 43 associated with the forward / backward movement of the thread pressing member 35 is similar to the above case. As the carriage 45 moves to the right, the needle passes the top of the raising cam 52 and is held by the yarn pressing member 35 at the upper edge of the needle when it is about to be pulled down by the knitting cam 53. In FIG. 3, the control butt 37 of the yarn pressing member corresponding to the needle descending the slope of the raising cam 52 raises the cam crest of the yarn pressing member control cam 48b (A in FIGS. 3 and 5). As a result, the thread pressing member 35 advances the action surface 36 from both sides with respect to the thread of the needle bed gap and presses the thread against the inside of the hook of the needle at the most advanced position. At this time, the needle has started descending (B in FIGS. 3 and 5). Working surface 3
The needle further descends with 6 being most advanced (Fig. 3,
5C), the yarn 51 is completely caught by the hook of the needle 8, the yarn pressing member 35 is completely retracted, and the needle is also lowered (D in FIGS. 3 and 5).

While the yarn pressing member control cam 48 moves the yarn pressing member 35 forward and backward in association with the knitting operation as described above, the position of the yarn pressing member 35 with respect to the needle bed gap is all under the control of the control cam 48. Thread guide device 3 of the present embodiment
In the case of No. 3, the retracted position of the thread pressing member 35 is a position further retracted from the retracted position by the coil spring 43 as shown in FIG. 4, and at this position, the tip of the arm provided on the thread pressing member 35 is a band strap. Since the yarn pressing member 35 is pressed against the carriage, the position of the yarn pressing member 35 on the support bed is stable even after passing through the carriage. Further, even if the worker moves the yarn pressing member 35 to the advanced position during the knitting machine adjustment, the coil spring constantly receives the retracting action, so that the front and rear yarn pressing members collide with each other even if the needle bed is racked. There is no such thing. In the above-described embodiment, the retracting means provided on the thread pressing member retracts the thread pressing member only to a position that does not exceed the center line of the needle bed gap. It is also possible to set the member control cam 48 to the retracted position by the retracting cam 49a, and in this case, only the advancing cam 49b of the yarn pressing member need be provided in the operating means.

<Second Embodiment> Next, a second embodiment will be described with reference to FIGS. The second embodiment shows an example in which the yarn guide device is applied to a four-bed flat knitting machine in which a mountain bed is provided on the upper side of a lower bed provided with the tops facing each other, and further, an upper bed is supported. A compound needle consisting of a needle body and a slider is inserted into each needle bed, and is moved back and forth by a carriage (not shown) that reciprocates on the upper surface thereof. In this embodiment, the advance / retreat control of the thread pressing member is performed by the operating means provided on the carriage for the upper bed. In addition, it should be noted that the sinker of the present embodiment is provided with a swingable movable sinker, and the retracting means of the thread pressing member has a hook for holding a sinker loop provided at the tip side of the sinker at the lower side of the tooth space. It also serves as a biasing means for elastically biasing. The needle bed includes main components such as a lower needle bed substrate 70, a lower needle plate 71, an upper needle bed substrate 72, and an upper needle plate 73, and a lower spacer 120, an upper spacer 124, a sinker 100, a sinker spring 108, a thread pressing member 110. Etc. and a needle body 131 as a knitting member, a slider 132, a needle jack 133, a select jack, a selector and the like. Some of the above components are shown in FIG.

FIG. 7 shows a longitudinal section of the rear bed of the needle beds arranged symmetrically about the center line Y-Y. The upper needle bed substrate 72 is supported by a lower needle plate 71 that is inserted into a needle plate groove 74 provided in the lower needle bed substrate 70. The lower needle plate 71 has a lower needle guide plate portion 7 extending from the head portion to the tail portion of the lower needle bed 71.
5 and a head needle plate portion 76 composed of an extension portion extending upward. A thin step portion 78 for attaching a sinker and a step portion 79 for attaching a thread pressing member are provided on the left side surface portion of the head needle plate portion 76, and a transfer needle for each compound needle 133a, 133b of the upper and lower beds is provided on the right side surface portion. Feather 134
The storage steps 81a and 81b of a and 134b are respectively cut. Further, a fixed beam 9 for fixing an upper needle bed substrate 72 described later to the lower needle plate 71.
The upper needle bed substrate 72 is supported by an inclined support surface 88 which has an insertion hole 84 for inserting the wire 5, a wire insertion hole 85, a fitting groove 86 for the band 130, and the like.
A wedge-shaped engaging portion 90 and a cutout portion 91 for fixing the lower needle plate 71 are provided on the head and the lower surface of the upper needle bed base plate 72, and the upper needle bed base plate 72 mounted on the supporting surface is the head. The wedge-shaped notch portion 92 formed in the needle plate portion 76 is engaged, and the wedge-shaped end portion 94a at one end of the belt-shaped locking member 94 extending in the longitudinal direction of the needle bed is engaged with the notch portion 91. In this state, the fixed beam 95 inserted into the fixed beam insertion hole 84 of the lower needle plate 71 and the locking member 94 are fixed by the screw 96. In the figure, bt1 to bt10 are needles protruding outside the needle groove, needle jacks, select jacks,
The control bat provided in the selector etc. is shown. The upper needle bed substrate 72 includes the lower needle bed substrate 70.
Needle plate grooves 98 are provided in the same pitch and in the same phase, and the upper needle plate 73 is inserted and fixed.

FIG. 8 is a sectional view showing a part of FIG. 7 in an enlarged manner. The sinker 100 has a head needle plate portion 7
U-shaped bearing 78 on the same plane as the step 78 formed in 6
It is supported with the sinker spring 108 mounted on a. The sinker 100 is a movable sinker, and a hook portion 101 for holding a sinker loop on the tip side, a control butt 102 on the upper surface, and a hanging arm 105 which is a J-shaped swinging fulcrum downward from the sinker body 103 will be described later. A slit 107 for inserting the sinker spring 108 is provided. The thread pressing member 110 is supported on the front side of the sinker 100 by the stepped portion 79 of the head needle plate portion 76. The thread pressing member 100 is provided with a thin head portion 113 having an action surface 112 at the tip of the main body portion 101, a sliding resistance imparting portion 114, a notch portion 116, and a control butt 117, which are substantially the same as those in the first embodiment. It has a unique configuration.

The sinker spring 108 mounted on the sinker 100 is composed of a linear spring. The sinker spring 108 has the same thickness as the sinker, one end is sandwiched by the slits 107, and the other end abuts on the abutting portion 78b of the stepped portion 78 of the needle plate.
The hook 101 of No. 00 is urged toward the lower part of the tooth gap. The end portion 109 of the sinker spring 108 that abuts the abutting portion 78b is wound several times to increase the thickness, and the thickened portion is inserted into the notch 116 of the adjacent thread pressing member 110. As a result, even if the thread pressing member 110 advances toward the needle bed gap direction, it can be retracted to the retracted position shown in the figure.
This retracted position is a position that does not intersect at least the yarn pressing members arranged on the bed facing each other.

FIG. 9 is a view corresponding to FIG. 8 and shows a compound needle 133.
The cross section from the left side of the needle main body 131 is shown. FIG.
FIG. 10 is a cross-sectional view showing, in an enlarged manner, a part of the needle bed as seen from the direction of arrows I-I in FIG. 9. The needle 133a of the lower bed is provided between the adjacent lower needle plates 71, 71.
And the lower spacer 120 is mounted on the upper part of the upper part. The lower spacer 120 is supported by inserting a wire 136 penetrating between the needle plates into the insertion hole 121. The lower surface 120a of the lower spacer 120 is the upper support surface of the needle of the lower bed, and the inclined upper surface 120b is the needle bottom support surface of the needle bed leading portion of the needle of the upper bed. Further, the upper spacer 124 is provided above the needles of the upper bed.
The lower surface 120a of the sinker 10 supports the upper needles of the upper bed and is inserted in a stacked state.
0 and the thread pressing member 110 and the head needle plate portion 7
The gap between 6 and 6 is filled and lateral support is performed. Each of the above-mentioned members is supported on the needle bed by the band 130 fitted in the fitting groove 86 formed above the lower needle plate 71 to prevent the members from falling off.

FIG. 11 shows a cam operating state when the carriage of the upper bed guides the yarn to the hook of the needle 133 while the carriage in the direction of the arrow is moving. The needle manipulating cam 140, the yarn pressing member control cam 150 and the sinker are shown. A control cam 160 is provided. Reference characters R, S, and T in the figure represent loci of the needle jack, the yarn pressing member, and the control butt of the sinker. As can be seen from the figure, during the knitting, the forward / backward movement of the sinker 100 and the forward / backward movement of the thread pressing member 110 are not performed at the same time. In the present embodiment, the advancing cam 152 provided in the yarn pressing member control cam 150 is connected to a drive means (not shown) so as to be movable back and forth in the needle bed gap direction, and its advancing position is changed according to a command from the controller. Adjusted. In the figure, the leading advance cam 152a is in the retracted inoperative position and the trailing advance cam 152b is in the extended position. The broken line S'in the figure shows the locus of passage of the control butt of the yarn pressing member 110 when the preceding advancing cam 152a has advanced.

The advancing cam 152 is switched in its operating state by the driving means upon receiving a command from the controller when the traveling direction of the carriage is reversed. Further, even when performing the racking operation of the needle bed with the carriage positioned on the needle bed, the drive means is operated before the racking command from the controller, and the left and right advance cams 152a and 152b are set to the retracted position. To be done. This means that the yarn pressing members can be retracted regardless of the position of the carriage on the needle bed, and interference between the yarn pressing members during racking can be prevented. Further, for example, when the interference with the yarn feeder in the stopped state on the needle bed poses a problem, the retreat amount may be further increased. The advancing amount of the advancing cam 152 can be selected differently depending on whether the yarn is guided to the hook of the needle or when the yarn is guided to the back side of the needle. Although the preferred embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to the above embodiments and can be implemented without departing from the spirit of the present invention.

[0036]

As described above, in the yarn guide device of the present invention, the yarn pressing member is configured to be retracted to the predetermined retracted position by the retracting means, so during the maintenance work of the knitting machine such as the needle replacement work. Even if the knitting machine is operated in a state where it is not set to the proper position and the racking operation of the needle bed is performed, the tips of the yarn pressing members do not collide with each other.

Further, since the retracting means of the thread pressing member utilizes the restoring force when the elastic member is elastically deformed, a driving device such as a motor is not required.

Further, since the retracting means of the yarn pressing member and the urging means of the movable sinker can be the same parts, the number of parts can be reduced and the apparatus can be simplified.

Further, since the advancing cam arranged on the carriage can be displaced by being connected to the driving means so as to make the yarn pressing member retractable to the retracted position, the racking operation can be performed regardless of the position of the carriage on the needle bed. You can

Further, since the sliding resistance applying portion provided on the yarn pressing member does not work at the time of the retracting operation by the retracting means, but does not work at the time of the further retracting operation by the yarn pressing member control cam, the retracting operation is performed. The driving force for
Since the sliding resistance is applied at the last retracted position, it is possible to prevent the thread pressing member from moving.

[Brief description of the drawings]

FIG. 1 shows a yarn guiding device of a first embodiment, FIG. 1-A is a vertical cross-sectional view near the top of a needle bed, and shows a cross section of a needle bed and a carriage of a yarn pressing member, and FIG. 1-B is a needle,
It is a partial top view of only a sinker and a thread holding member.

FIG. 2 is a view showing a side surface of a needle plate having a protruding portion.

FIG. 3 is a layout diagram showing a positional relationship between a needle manipulating cam and a yarn holding member control cam.

FIG. 4 is a diagram showing an operating state of the needle and the thread pressing member when guiding the thread to the back side of the needle.

FIG. 5 is a diagram showing an operating state of the needle and the thread pressing member when the thread is guided to the hook side of the needle.

FIG. 6 is a view showing a needle plate, a spacer, a sinker, and a yarn pressing member of a flat knitting machine having a yarn guiding device of a second embodiment.

FIG. 7 is a view showing a vertical cross section of the rear bed of the second embodiment.

FIG. 8 is an enlarged view showing the vicinity of a bed gap of the rear bed shown in FIG. 7.

FIG. 9 is an enlarged view corresponding to FIG. 8 showing a cross section from the left side surface of the needle body in the vicinity of the bed gap of the rear bed.

FIG. 10 is an enlarged view in a cross-sectional arrow direction of line I-I of FIG. 9.

FIG. 11 is an arrangement view showing the operating states of the needle manipulating cam, the yarn pressing member control cam, and the sinker control cam while the carriage is moving in the arrow direction.

[Explanation of symbols]

 2 ... Needle plate groove 3 ... Needle plate 4, 5 ... Recessed portion 12 ... Projection portion 13 ... Support surface 14, 15 ... Insertion hole 17 ... Band 20 ... Sinker 22 ... Recessed portion 24 ... Tooth opening 25 ... Groove 26 ... Thread pressing member support bed 28 ... Operating means 32 ... Fixed beam 33 ... Thread guiding device 35 ... Thread pressing member 39 ... Arm 39a ... Projection portion 40 ... Recessed notch 43 ... Coil spring 48 ... Control cam 50 ... Thread feeding port 51 ... Thread 71 ... Lower needle plate 73 ... Upper needle plate 78, 79, 81, 82 ... Step portion 84, 85 ... Insertion hole 100 ... Sinker 108 ... Sinker spring 110 ... Thread holding member 120 ... Lower spacer 124 ... Upper spacer 150 ... Thread holding member Control cam 160 ... sinker control cam

Claims (7)

[Claims] 1. A flat knitting machine having at least a pair of front and rear needle beds facing each other and having a large number of needles and sinkers planted on the needle beds, and is movable back and forth beyond the center of the needle bed gap. And a plurality of yarn pressing members having an action surface capable of pushing down the yarn extended from the yarn feeder to the needle at the advanced position to at least the action position where the yarn can be caught by the hook of the needle performing the knitting operation, An operating means for advancing the operating surface of the thread pressing member to the operating position is provided, and the tip of the thread pressing member does not cross the center of the needle bed gap when the thread pressing member is not affected by the operating means. A yarn guide device for a flat knitting machine, comprising a retracting means for retracting to a position. 2. An elastic member is disposed between the thread pressing member and a support portion for accommodating and supporting the thread pressing member, and the elastic member is elastically deformed by the relative movement of the thread pressing member and the supporting portion due to the advance of the thread pressing member. 2. The yarn guide device for a flat knitting machine according to claim 1, wherein a retracting means for the yarn pressing member is configured by utilizing elastic force generated at that time. 3. The yarn guide device for a flat knitting machine according to claim 2, wherein the elastic member also serves as an urging means for elastically urging the hook of the movable sinker downwardly in the needle bed gap. 4. The yarn holding member control cam arranged on a carriage that reciprocates on a needle bed engageable with a control butt provided on the yarn holding member. 2. A yarn guide device for a flat knitting machine according to item 2. 5. The yarn guiding apparatus according to claim 4, wherein an advancing cam is connected to the driving means and displaceable so that the yarn pressing member located immediately below the carriage can be retracted to the retracted position. . 6. The yarn pressing member control cam includes a retreating cam for retracting the yarn pressing member to a position further retracted from a retracted position by the retracting means, and a sliding resistance provided on the yarn pressing member at the retracted position. The yarn guide device according to claim 4, wherein the applying portion is in pressure contact with a part of the support bed. 7. The yarn guide device is implemented in a four-bed flat knitting machine supporting a lower needle bed having a mountain-shaped top portion facing each other and further supporting an upper needle bed. A yarn guide device for a flat knitting machine according to any one of claims 1 to 6.