JP2009068122A - Weft knitting machine and needle selection method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weft knitting machine that reduces the size and weight of a carriage and improves knitting efficiency, and to provide a needle selection method thereof. <P>SOLUTION: When only a cam system 13 is used, two-stage needle selection is carried out by a needle selection actuator 16 on a left side. In a left end needle selection actuator 14, preliminary needle selection is carried out during movement to the right 3R. After the reversal of traveling direction of the carriage 3, retreat needle selection not changing the preliminary needle selection state of a selector 44 is carried out. A retractable part 20a of a movable select jack lowering cam 20 is retracted. Since stationary select jack lowering cams 18 and 19 are used at both ends of the carriage 3 and do not need to be retractable for the stationary select jack stitch needle cams, the carriage is reduced in size and weight, a knitting efficiency is improved and cost reduction is achieved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a flat knitting machine for selectively driving a knitting needle to perform a knitting operation and a needle selection method thereof.

  Conventionally, a flat knitting machine, particularly a flat knitting machine automated by computer control, has been selected to individually select knitting needles arranged in parallel on the needle bed and to drive the knitting operation according to the needle selection result. Has been done. The needle selection and driving of the knitting needle is performed by a cam system mounted on a carriage that reciprocates in the direction in which the knitting needles are arranged along the needle bed. As the knitting operation of the knitting needles, there are at least two types of knitting, in which a knitting needle that locks the stitches of the old loop is formed so that the stitches of the new loop are formed and the stitches of the old loop are knocked over, and the knitting needle is not driven. There are seeds. Needle selection for distinguishing between the two types can be performed by a single needle selection actuator.

  In addition to knit and miss, the basic knitting operation of the flat knitted fabric by the flat knitting machine includes tack that remains on the knitting needle without knocking over the old loop stitch when forming the new loop stitch. Including tack, it is necessary to distinguish three types of needle selection operations. If one needle selection actuator is provided on each side of one cam system provided on the carriage, and two stages of needle selection are performed with the same needle selection actuator when the carriage reciprocates, three types of selection actuators are distinguished. The needle operation becomes possible (for example, refer to Patent Document 1). When the carriage moves to one side, it is a preliminary selection as the first stage when the knitting needle goes out from the inside of the carriage by the trailing needle selection actuator provided at the other end of the cam system. Do the needle. When the carriage reverses the moving direction and moves to the other side, the needle selection actuator that performed the preliminary needle selection becomes the leading side and performs the main needle selection as the second stage needle selection. The result of the needle selection operation that distinguishes the three types is reflected in the fact that the orbital position of the select jack that constitutes the knitting needle is selected as one of the three positions of the upper position, the middle position, and the lower position.

FIG. 3 of Patent Document 1 shows a configuration of a carriage on which two cam systems are mounted. One needle selection actuator is provided between the two cam systems together with both ends of the carriage. If there is only one needle selection actuator provided between the two cam systems, the selection of the knitting operation is limited because only one stage of needle selection can be performed for the following cam system. If two needle selection actuators are arranged between the cam systems, switching of the knitting operation based on two stages of needle selection can be performed for each knitting needle in each of the plurality of cam systems (see, for example, Patent Document 2). ).
Japanese Examined Patent Publication No. 61-20670 JP-A-5-156553

  In order to efficiently knit a knitted fabric with a flat knitting machine, it is necessary to reduce the size and weight of the carriage. For this purpose, a plurality of cam systems may be mounted on the carriage, and a plurality of knitting operations may be performed while the carriage travels once. However, if the stitches of a plurality of courses are knitted while the carriage travels once, the stitches of each course are knitted with different knitting yarns. When the stitches of each course are knitted with the same knitting yarn, knitting is performed with one specific cam system among a plurality of cam systems, and the other cam systems are used for transfer or the like as necessary. For example, if the leading cam system is always used for knitting according to the traveling direction of the carriage, the cam system to be used must be changed according to the traveling direction. If the cam system to be used is changed, the position of the yarn feeder for feeding the knitting yarn must also be changed.

  When knitting is performed using only one specific cam system among the plurality of cam systems, the other cam systems are not used and are stopped. When there is a cam system that pauses on one side of the cam system to be used, when the carriage travels to the other side, the needle selection actuator on one side of the cam system to be used performs preliminary needle selection, and the cam system that pauses has a spare cam system. It is necessary not to change the needle selection state of the selected knitting needle. In Patent Document 1 and Patent Document 2, the select jack lowering cam that lowers the select jack to the lower position is partially retracted. If the movable portion of the select jack lowering cam is in the sunk state, the select jack can be lowered only to the middle position, so that the orbital position of the select jack that has been brought to the middle position by the preliminary needle selection can be prevented from changing.

  However, at both ends of the carriage, there are one retractable select jack lowering cam corresponding to the needle selection actuator. If the select jack lowering cam is retracted, it is inevitable to increase the size and weight of the retracting mechanism. In addition, by making the select jack lowering cam retractable, the number of components and the like increase and the manufacturing cost also increases.

  An object of the present invention is to provide a flat knitting machine and a needle selection method thereof that can improve knitting efficiency by reducing the size and weight of a carriage.

In the present invention, a knitting needle having a selector and a select jack for needle selection is arranged side by side on the needle bed, and a carriage that reciprocates the needle bed in the direction of juxtaposition of the knitting needle, the select jack is selected in two stages. In a flat knitting machine in which a plurality of cam systems that guide to a track position of a lower position, a middle position, or an upper position and drive a knitting needle according to each track position are mounted along the moving direction,
A needle selection actuator arranged between the cam systems inside the carriage and at the end of the carriage on the outside of the cam system, and acting on the selector to perform one-stage needle selection;
A fixed selector raising cam arranged adjacent to the outside of the needle selection actuator at the end of the carriage and acting on the selector in the selected state to guide the select jack to the middle track position;
A movable selector that is arranged adjacent to the inside of the needle selection actuator at the end of the carriage and can be switched between action and non-action, and acts on the selector in the selected state at the time of action to guide the select jack to the upper track position. Raising cam,
A select jack lowering cam that is disposed outside the needle selection actuator at the end of the carriage and adjacent to the outer side of the fixed selector raising cam, and forcibly guides the select jack to the lower track position;
Control means for controlling each needle selection actuator and each movable selector raising cam,
The needle selection actuator that is the last in the movement of the carriage with respect to the needle bed performs preliminary needle selection as the first stage of the two-stage needle selection, and after reversing the movement direction, it is adjacent to the needle selection actuator When knitting with the cam system, the needle selection as the second stage of the two-stage needle selection is performed, and when knitting is not performed with the cam system, control is performed so as to maintain the needle selection state.
The movable selector raising cam disposed adjacent to the inside of the needle selection actuator is controlled to switch to the operation when performing the main needle selection and to the non-operation when maintaining the needle selection state.
The flat knitting machine further includes a control means.

Further, in the present invention, the needle bed is provided on the front and back so as to face each other across the mouth.
A racking mechanism that shifts the front and back needle beds to the left and right relatively is also provided.
The control means performs the control as the movement of the carriage with respect to the needle bed, including the movement accompanying the movement of the carriage along the needle bed and the movement accompanying the displacement by the racking mechanism.

In the present invention, two carriages on which the plurality of cam systems are mounted are provided on the needle bed,
The control means includes
With tandem knitting that separates two carriages and operates each carriage independently, controlling each carriage equally,
In a multi-cam knitting operation in which two carriages are connected to operate as a single carriage mounted with the multiple number of cam systems, the needle selection actuator at the end of the preceding carriage is the preliminary needle selection. The needle selection actuator at the head of the carriage on the following side is controlled to maintain the preselected needle selection state,
It is switchable.

Further, according to the present invention, a knitting needle having a selector and a select jack for needle selection is arranged side by side on the needle bed, and the select jack is arranged in two stages of needle selection on a carriage that reciprocates the needle bed in the direction in which the knitting needle is arranged. The cam system that guides to the lower, middle, or upper orbital position and drives the knitting needles according to the respective orbital positions is a flat knitting machine that is mounted along the moving direction. In the method of needle selection,
A needle selection actuator that acts on the selector to perform one-stage needle selection is arranged between the cam systems inside the carriage and at the end of the carriage that is outside the cam system.
Next to the outside of the needle selection actuator at the end of the carriage, a fixed selector raising cam that acts on the selector in the selected state and guides the select jack to the middle track position,
A movable selector raising cam that can switch between action and non-action adjacent to the inside of the needle selection actuator at the end of the carriage, and that acts on the selected selector during operation to guide the select jack to the upper track position. And place
A select jack lowering cam that forcibly guides the select jack to the lower track position is arranged outside the needle selection actuator at the end of the carriage and adjacent to the outer side of the fixed selector raising cam.
The needle selection actuator that is the last in the movement of the carriage with respect to the needle bed performs preliminary needle selection as the first stage of the two-stage needle selection, and after reversing the movement direction, it is adjacent to the needle selection actuator When knitting with the cam system, perform the final needle selection as the second stage of the two-stage needle selection, and when not knitting with the cam system, do not change the needle selection state,
The movable selector raising cam arranged adjacent to the inside of the needle selection actuator switches to the operation when performing the main needle selection and to the non-operation when maintaining the needle selection state.
This is a needle selection method for a flat knitting machine.

  According to the present invention, when the carriage is moving to one side, for example, if the cam system at the other end is used, the control means When the needle selection actuator performs preliminary needle selection as the first stage of the two-stage needle selection and moves to the other side by reversing the moving direction, the main needle selection is performed as the second stage of the two-stage needle selection. To control. With the two-stage needle selection, the select jack can be guided to the track position at any one of the lower position, the middle position, and the upper position, and the knitting needles can be knitted and driven according to each track position. When the cam system used for knitting is not adjacent to the needle selection actuator at the other end of the carriage, the needle selection actuator at the other end does not change the needle selection state after reversing the traveling direction of the carriage. Therefore, the select jack lowering cam disposed on the other side of the needle selection actuator can be prevented from affecting the needle selection state. Since the select jack lowering cam does not need to be retractable, the carriage can be made smaller and lighter, and the knitting efficiency can be improved and the cost can be reduced.

  Further, according to the present invention, even when there is a displacement due to the racking mechanism between the needle beds provided at the front and rear, the two-stage needle selection of the preliminary needle selection and the main needle selection can be performed appropriately.

  In addition, according to the present invention, since the carriage is reduced in size and weight, two carriages on which a plurality of cam systems are mounted are provided on the needle bed, and the two carriages are connected to form a double number of cam systems. Efficient knitting can be performed by switching between multi-cam knitting that operates as a single carriage to be mounted and tandem knitting that separates two cam systems and operates each carriage independently as required. .

  Furthermore, according to the present invention, since the needle selection actuators that act on the selector and perform one-stage needle selection are arranged between the cam systems inside the carriage, the distance between the cam systems can be reduced. A needle selection actuator that performs one-stage needle selection is also arranged at the end of the carriage that is outside the cam system. The needle selection actuator at the end performs preliminary needle selection when the carriage moves toward the trailing side as it moves relative to the needle bed. The needle selection actuator becomes the leading side when the moving direction is reversed, and performs the main needle selection when the cam system adjacent to the trailing side is used for knitting, and does not change the needle selection state of the knitting needle when not used for knitting. On the outside of the needle selection actuator, there is a fixed selector raising cam that acts on the selector in the selected state and guides the selection jack to the middle track position, and the selection jack is forcibly adjacent to the outside of the selector raising cam. A select jack lowering cam is arranged to guide the lower track position. The state of the selector that has been preliminarily selected when the end needle selection actuator is on the following side is maintained until the carriage reverses the moving direction and the end needle selection actuator is on the leading side. The inverted select jack is once guided to the lower position by the select jack lowering cam before reaching the needle selection actuator at the end on the leading side. If the selector is in the selected state with preliminary needle selection, the selector that rises the next time it passes through the fixed selector raising cam raises the select jack to the middle position and returns the select jack to the preliminary needle selection state. It is possible to enter the needle selection actuator at the end. Since the select jack lowering cam at the end of the carriage does not need to be retractable, the carriage can be reduced in size and weight, and the knitting efficiency can be improved and the cost can be reduced.

  FIG. 1 shows a simplified schematic configuration of a flat knitting machine 1 as an embodiment of the present invention. The flat knitting machine 1 knits the knitted fabric while controlling the carriage 3 traveling along the needle bed 2 with the controller 4. A plurality of, for example, three cam systems 11, 12, 13 are arranged on the carriage 3 along the traveling direction. Corresponding to each of the cam systems 11, 12, 13, selector return cams 11a, 12a, 13a for returning the knitting needle selector to a selected state floating in the needle groove are also provided. One needle selection actuator 14, 15, 16, 17 is arranged on each side of each cam system 11, 12, 13. The needle selection actuators 14 and 17 are disposed at both ends of the carriage 3. The needle selection actuators 15 and 16 are arranged in the middle of the cam systems 11, 12 and 13. In each cam system 11, 12, 13, the knitting needle is selected according to the track position of the select jack divided into B position, H position or A position based on needle selection by the needle selection actuators 14, 15, 16, 17. Drive.

  Corresponding to the needle selection actuators 14 and 17 on the left end side and the right end side of the carriage 3, fixed select jack lowering cams 18 and 19 are provided. The fixed select jack lowering cams 18 and 19 have protrusions 18a and 19a. Corresponding to the needle selection actuators 15 and 16 in the middle of the carriage 3, movable select jack lowering cams 20 and 21 are provided. The movable select jack lowering cams 20 and 21 have projecting parts 20a and 21a. In association with each of the needle selection actuators 14, 15, 16, 17, fixed selector raising cams 22, 23, movable selector raising cams 24, 25 and switchable selector raising cams 26, 27, 28, 29 are provided.

  Knitting needle selection by the needle selection actuators 14, 15, 16, and 17 is performed based on the position of the carriage 3 detected by the position sensor 30. The controller 4 as control means has data of the positions of the needle selection actuators 14, 15, 16, 17 on the carriage 3, and which needle selection actuators 14, 15, It is grasped whether it is in the position to receive the needle selection action of 16, 17 and each needle selection actuator 14, 15, 16, 17 is controlled. If the position sensor 30 directly detects the relative position of the carriage 3 with respect to the needle bed 2, in addition to the case where the carriage 3 travels with respect to the needle bed 2 and the position of the knitting needle changes, the front and back needle beds are changed. The needle selection can be controlled including the case where the position of the knitting needle with respect to the carriage 3 is changed by racking that shifts 2. When the position sensor 30 detects the position of the carriage 3 with respect to the frame of the flat knitting machine 1, since the carriage 3 is stationary with respect to the frame of the flat knitting machine 1 in racking, a change in position cannot be directly detected. If the controller 4 takes into account racking information, the needle selection can be controlled including the positional change of the carriage 3 relative to the needle bed 2 due to racking.

  FIG. 2 shows an example of the configuration of the knitting needles 40 arranged side by side on the needle bed 2 shown in FIG. Needle grooves are formed in the needle bed 2 at a constant pitch in a direction perpendicular to the right side 3R and the left side 3L as the traveling direction of the carriage 3. The knitting needle 40 is accommodated in each needle groove in a state that allows sliding displacement to advance and retreat with respect to the tooth opening. In the knitting needle 40, a needle jack 42 is engaged with the rear part of the needle body 41. A select jack 43 and a selector 44 are sequentially engaged behind the needle jack 42. The needle jack 42 has a knitting operation bat 45 and a transfer operation bat 46 which receive the action of the cam systems 11, 12 and 13 of the carriage 3. A pressing butt 47 provided near the tip of the select jack 43 acts on the back of the knitting operation bat 45 of the needle jack 42. The selector 44 acting on the select jack 43 has a needle selection butt 48c between upper and lower bats 48a and 48b used for positioning for receiving a needle selection action by the needle selection actuators 14, 15, 16, and 17. One needle selection bat 48c is provided for each selector 44, but divided into eight positions, for example, as indicated by broken lines, so that adjacent knitting needles have different positions.

  A hook 50 is provided at the tip of the needle body 41 and advances to the tooth opening to receive the supply of knitting yarn. The hook 50 is opened and closed by a spatula 51. At a position slightly retracted from the hook 50 of the needle body 41, a blade 52 that holds the stitch loop on the stitch transfer side at the time of stitch transfer is provided. As the knitting needle 40, not only such a latch needle but also a compound needle that opens and closes a hook with a slider can be used.

  FIG. 3 shows the configuration of the carriage 3 of FIG. 1 in more detail. The cam systems 11 and 13 on both sides have knitting cam locks 11b and 13b, projecting and unloading cam locks 11c and 13c, and eye receiving cam locks 11d and 13d so that the knitting and transfer can be switched. Can be used. The cam system 12 has only the knitting cam lock 12b.

  Each of the needle selection actuators 14, 15, 16, 17 has a plurality of, for example, eight swinging claws 14a, 15a, 16a, 17a. Each of the swinging claws 14a, 15a, 16a, and 17a performs selection to switch the selector to the non-selected state or the selected state depending on whether one of the needle selection bats 48c of the selector 44 is pressed. Can do.

  The selector 44 is selected based on the combination of whether or not the needle selection bat 48c is pressed by the needle selection actuators 14, 15, 16, and 17. The selector 44 in the selected state floats in the needle groove, and the fixed selector raising cams 22, 23, the movable selector raising cams 24, 25 and the switchable selector raising cams 26, 27; It becomes a state where it can act. When these cams act, the tip of the selector 44 pushes the pressing butt 47 of the select jack 43 from the rear to the front mouth side. When the needle selection butt 48c is pressed and the selector 44 sinks into the needle groove, the non-selection state is established. The non-selected state of the selector 44 is canceled when the tail end of the selector 44 is pushed up from the bottom side of the needle groove by the selector return cams 11a, 12a, 13a, and returns to the selected state.

  The select jack 43 is guided so that the pressing butt 47 passes through the track of the A position, the H position, or the B position. When the pressing butt 47 is pressed by a presser disposed in the path, the select jack 43 sinks into the needle groove. In the needle jack 42, when the select jack 43 sinks into the needle groove, the knitting operation butt 45 does not protrude from the needle groove.

  The switchable selector raising cams 26, 27; 28, 29 can be switched in and out, and are further provided with protruding portions 26a, 27a; 28a, 29a, respectively. In the state in which the switchable selector raising cams 26, 27; 28, 29 are projected, whether the selection jack 43 is guided to the A position via the selector 44 in the selected state when the protrusions 26a, 27a; , It is possible to switch between guiding to the H position.

  In order to reliably select the needles with respect to the selector 44 by the respective needle selection actuators 14, 15, 16, 17, selector lowering cams 54, 55, 56, which act on the butt 48 a on the selector 44 and lower the selector 44 to the reference position. 57 are provided. The cam systems 11, 12, and 13 are provided with presser groups 58, 59, and 60 for pressing the pressing butt 47 according to the needle selection result of the select jack 43, respectively. In the presser groups 58, 59, 60, different pressers can be arranged for each orbital position through which the pressing butt 47 passes at the three positions A, H, B of the select jack 43. When the pressing butt 47 is pressed, the knitting operation bat 45 of the needle jack 42 also sinks into the needle groove via the select jack 43. When the knitting operation bat 45 sinks into the needle groove, the knitting cam locks 11b, 12b, 13b and the eye catching cam locks 11d, 13d are not affected. When the pressers arranged in the presser groups 58, 59, 60 release the pressing to the pressing bat 47, the needle jack 42 and the select jack 43 are urged in the needle groove by the bias of the spring formed on the tail end side. The knitting operation butt 45 and the pressing bat 47 return so as to protrude from the needle groove.

  At the knitting end of the carriage 3 on the right side when only the cam system 13 is used, the carriage 3 may be moved to the position of the switchable selector raising cam 28 where the result of preliminary needle selection by the needle selection actuator 16 appears. . In the range indicated by the reference numeral 62, it is affected by the fixed select jack lowering cam 18, but if the preliminary needle selection is also performed by the needle selection actuator 14 on the left end side, the carriage 3 is in the left direction with the moving direction reversed. , The preliminary needle selection state can be maintained.

  Hereinafter, the needle selection control by the controller 4 will be described with reference to FIGS. For example, when the carriage 3 is moving to the right side 3R which is one side, the cam system 11 at the end of the left side 3L which is the other side is used for knitting, and the next movement to the left side 3L is also used for knitting. If used, two-stage needle selection is performed by the needle selection actuator 14 at the end on the left side which is the last when moving to the right. That is, preliminary needle selection as the first stage is performed when moving to the right 3R, and main needle selection as the second stage is performed when moving the direction to the left 3L by reversing the movement direction. In two stages of needle selection, the select jack 43 is guided to the track position of the B position which is the lower position, the H position which is the middle position, or the A position which is the upper position, and the knitting needles according to each track position. 40 can be knitted.

  Similarly, even when moving to the right 3R and left 3L, the cam systems 11 and 12 are not used for knitting, and when only the cam system 13 is used for knitting, the left side needle selection actuator 16 is used for two. Perform stage selection. That is, when the selector 44 is not selected by preliminary needle selection by the needle selection actuator 16 when moving to the right 3L, the select jack 43 passes through the orbital position of the B position, and the selector 44 is not selected even by this needle selection. If it is in the state, it receives the action of the cam system 13 at the B position. If the selector 44 is in a selected state by preliminary needle selection by the needle selection actuator 16, the select jack 43 passes through the track position of the H position. In the main needle selection of the needle selection actuator 16 with respect to the selector 44 when the selection jack 43 is in the H position in the preliminary needle selection, the selection jack 43 changes to the orbit position of the A position when the selector 44 is selected, and in the non-selection state. Keep track position of H position.

  When moving to the right 3R, since the preliminary needle selection is performed by the needle selection actuator 16, the protruding portion 21a of the movable select jack lowering cam 21 is protruded. As a result, all the select jacks 43 subject to preliminary needle selection can be temporarily set to the B position. The switchable selector raising cam 28 has a direction to protrude when moving to the right 3R and to be immersed when moving to the left 3L. The switchable selector raising cam 27 has a directivity that protrudes when moving to the left 3L and immerses when moving to the right 3R. Due to this directionality, when moving to the right 3R, the switchable selector raising cam 28 protrudes and the switchable selector raising cam 27 is retracted. The protruding / exiting portion 28a of the switchable selector raising cam 28 is immersed. As a result, the select jack 43 when the selector 44 is in the selected state by preliminary needle selection is guided to the H position, and the select jack 43 when in the non-selected state maintains the B position.

  When the knitting needle 40 passes through the cam systems 12 and 11 during the movement to the right 3R, all the pressors of the H orbit are operated. The intruding portion 20a of the movable select jack lowering cam 20 is immersed. This is because the needle selection state is maintained if the select jack 43 is in the H position. The needle selection actuator 15 returns to the selected state by the selector return cam 12a and sinks all the selectors 44 that float up the needle groove, so that all the needle selection actuators 15 are not selected. It may be the same as the preliminary needle selection in the needle selection actuator 16. Similarly to the switchable select jack raising cam 28, the switchable select jack raising cam 26 protrudes based on the directionality, and the intrusion / intrusion portion 26a is retracted.

  If the protruding portion 18a of the fixed select jack lowering cam 18 can be controlled, the protruding portion 18a is retracted and the needle selection actuator 14 is the same as the needle selection actuator 15 like the movable select jack lowering cams 21 and 20. Can be controlled. When the protrusion 18a is immersed and the carriage 3 moves to the right 3R, the select jack 43, which is preliminarily selected by the needle selection actuator 16 and is in the H position, retains the H position in the needle selection state. Exit 3 to the left. The select jack 43 that has left the needle selection state in the H position and left to the left also moves to the needle selection actuator 16 while maintaining the H position even when the carriage 3 is reversed and moves to the left 3L. Needle can be done. This is because the select jack 43 in the H position does not become the B position due to the immersion of the projection 18 a in the middle and the immersion 20 a of the movable select jack lowering cam 20. In addition, when moving to the right 3R, the needle selection actuators 14 and 15 are in a fully immersed state where all the selectors 44 are submerged in the needle groove. Even when the carriage 3 moves to the left 3L after reversal, the needle selection actuators 14 and 15 are fully retracted.

  When using the fixed select jack lowering cam 18 in which the protruding portion 18a does not appear and disappear as in the present embodiment, the needle selection actuator 14 at the left end is moved by the needle selection actuator 16 when moving to the right 3R. Reproduce the preliminary needle selection. This is because there is no selector return cam on the downstream side of the needle selection actuator 14. The select jack 43 that has been selected by the preliminary needle selection by the needle selection actuator 16 reaches the needle selection actuator 14 while maintaining the H position, as indicated by the locus 47H of the pressing butt 47, and is preliminarily selected again. The The selector 44 that is selected by two preliminary needle selections by the needle selection actuators 16 and 14 rises as shown by the locus 48aH of the upper butt 48a and the locus 48bH of the lower butt 48b by the fixed selector raising cam 22, Since the select jack 43 is already in the H position, the track 47H does not change. The selector 44 which is in a non-selected state by the preliminary needle selection by the needle selection actuator 14 maintains the reference position without receiving the action of the fixed selector raising cam 22 as shown by the trajectories 48aB and 48bB.

  When the select jack 43 reaches the fixed portion 18a of the fixed select jack lowering cam 18, the H position select jack 43 is shifted to the B position. Since the fixed selector raising cam 22a is also provided on the outside of the fixed portion 18a, if the selector 44 is in the selected state, the selector 44 rises again as indicated by the trajectories 48aH and 48bH and is selected as indicated by the trajectory 47H. After raising the jack 43 to the H position, it is pulled out to the left of the carriage 3. If the selector 44 is not selected in the preliminary needle selection by the needle selection actuators 16 and 14, the selector 44 is not affected by the fixed selector raising cam 22a as shown in the trajectories 48aB and 48bB, and maintains the reference position and the carriage. Exit to the left of 3. Further, as shown in the locus 47B, the orbital position of the select jack 43 also leaves the carriage 3 to the left while maintaining the B position. Therefore, if the select jack 43 is selected at the H position by the preliminary needle selection at the preceding needle selection actuator 16, the select jack 43 maintains the H position even when the carriage 3 is removed. Further, if the select jack 43 is selected at the B position by the preliminary needle selection by the needle selection actuator 16, the select jack 43 maintains the B position even when the carriage 3 is removed.

  When the carriage 3 is moved to the left 3L after the carriage 3 is reversed, the selector 44 is selected by two preliminary needle selections, and is moved to the B position by the fixed select jack lowering cam 18 when the carriage 3 is moved to the right 3R. The select jack 43 raised to the H position by the fixed selector raising cam 22a is once lowered from the H position to the B position when passing through the protrusion 18a of the fixed select jack lowering cam 18. However, when passing through the fixed selector raising cam 22 again, the selector 44 in the selected state can receive the action of the fixed selector raising cam 22 to shift the select jack 43 from the B position to the H position. The knitting needle 40 that has not reached the fixed selector raising cam 22 when the carriage 3 moves to the right keeps the H position when the selector 44 is in the selected state by preliminary needle selection. Therefore, the knitting needle 40 in which the selector 44 is selected by preliminary needle selection with respect to the needle selection actuator 14 can enter the H position with the select jack 43 coming out of the carriage 3 at the H position.

  When the carriage 3 is reversed and moved to the left 3L, the needle selection actuator 14 performs retraction needle selection that does not change the needle selection state of the selector 44. For the retreat needle selection, the selector 44 may be selected by all the knitting needles 40. Since there is no selector return cam on the left side of the carriage 3, the selector 44 in the non-selected state does not return to the selected state. Even if the needle selection actuator 14 is selected, the non-selected state of the selector 44 does not change, so the result of the preliminary needle selection is maintained.

  As described above, the knitting needle 40 in which the selector 44 is selected by the preliminary needle selection at the time of the right row is fixed to the fixed selector raising cam 22a even if the selection jack 43 is lowered to the B position by the fixed selection jack lowering cam 18. After returning to the H position, the carriage 3 is removed. Further, when the left line is entered into the carriage 3 at the H position and the select jack 43 is lowered to the B position by the fixed select jack lowering cam 18, the needle selection is performed after the fixed selector raising cam 22 returns to the H position. The actuator 14 is reached. When the needle selection actuator 14 passes, the selector 44 is returned to the reference position by the selector lowering cam 54, but the select jack 43 maintains the H position. Although the movable selector raising cam 24 protrudes from the direction as in the case of the switchable selector raising cam 27 and the like, the movable selector raising cam 24 is made to immerse by independent intrusion control. When the movable selector raising cam 24 is protruded, it acts on the selector 44 selected in the selected state by the needle selection actuator 14 and shifts the select jack 43 to the A position. Even when the selector 44 is in the selected state by the preliminary needle selection, the movable selector raising cam 24 is immersed in order to maintain the select jack 43 at the H position.

  When the knitting needle 40 passes through the cam systems 11 and 12, all the pressers provided at the track position of the H position of the select jack 43 are operated. Between the cam systems 11, 12, the protruding portion 20 a of the movable select jack lowering cam 20 is immersed. This is because the select jack 43 in the H position is not lowered to the B position. All the selectors 44 that reach the needle selection actuator 15 float in the needle grooves under the action of the selector return cam 11a, and are in the selected state. Since the switchable selector raising cam 27 protrudes from the directionality, all of the needle selection actuators 15 are arranged so that the selector 44 of the non-selected knitting needle 40 is not subjected to the action of the switchable selector raising cam 27 in the preliminary needle selection. The needle is not selected and the selector 44 is submerged in the needle groove, or the needle is selected in the same manner as the preliminary needle selection, and the selector 44 in the non-selected state is submerged in the needle groove. The retractable portion 27a of the switchable selector raising cam 27 is retracted. Since the select jack 43 corresponding to the selector 44 in the selected state maintains the H position, there is no influence even if the selector 44 is affected by the switchable selector raising cam 27.

  When the knitting needle 40 reaches the needle selection actuator 16, the needle selection actuator 16 performs the second-stage main needle selection for the preliminary needle selection when moving to the right 3R. In the process including the preliminary needle selection before this, the state where the H position and the B position are sorted is maintained. In order not to lower the select jack 43 sorted to the H position to the B position, the protruding / exit portion 21a of the movable select jack lowering cam 21 is made to enter.

  If the knitting needle 40 that has been preliminarily selected at the H position is further selected by this needle selection, the H position is shifted to the A position. In the cam system 13 shown in FIG. 3, at the A position, the knitting needle 40 performs the knitting operation of the knit or the transfer side transfer operation. If the knitting needle 40 preliminarily selected in the H position is not selected in this needle selection, the H position is maintained, and the knitting needle 40 performs the tuck knitting operation or the transfer receiving operation. The switchable selector raising cam 29 is projected in accordance with the directionality. Further, the protruding and protruding portion 29a is also projected. This is because the selector jack 43 is moved from the H position to the A position by acting on the selector 44 selected by this needle selection.

  As described above, the fixed select jack lowering cams 18 and 19 are used at both ends of the carriage 3, and it is not necessary to make it extend and retract. Therefore, the carriage can be reduced in size and weight, and the knitting efficiency is improved. At the same time, the cost can be reduced.

  FIG. 4 shows a configuration as a flat knitting machine 71 according to another embodiment of the present invention. In the flat knitting machine 71, a single needle knitting and a tandem knitting can be used separately by using a long needle bed of about 2300 mm, for example, and the carriage 73 having the same configuration as the carriage 3 shown in FIG. In the single knitting, the two carriages 3, 73 are connected and used as one carriage having six cam systems 11, 12, 13. In such a single knitting, six course knitting can be performed at the same time, and the knitted fabric used for the fabric for cut and saw can be knitted efficiently. In the tandem knitting, the two carriages 3, 73 are separated and the knitted fabrics are knitted by the three cam systems 11, 12, 13 respectively. In the tandem knitting, each carriage 3, 73 can be operated in the same manner as the carriage 3 in FIG. When many cam systems 11, 12, 13 are used, only one needle selection actuator 15, 16 is arranged between the cam systems 11, 12, 13, and fixed select jack lowering cams 18, 19 are arranged at both ends. Therefore, the effect of reducing the size and weight becomes remarkable.

  A case is assumed in which single knitting is performed and two-stage needle selection is performed using the cam system 13 on the right side of the carriage 3 for knitting. When the other cam systems 11 and 12 and the cam systems 11, 12, and 13 of the carriage 73 are not used for knitting, the pre-selection is performed with the needle selection actuator on the preceding side of the connecting portion, that is, the needle selection actuator 14 of the carriage 3 when moving right. The needle is moved, and the retraction needle is selected to maintain the needle selection state by the needle selection actuator 17 of the carriage 73 on the following side. When the left direction is reversed with the traveling direction reversed, preliminary needle selection is performed by the preceding needle selection actuator 17 and retraction needle selection is performed by the subsequent needle selection actuator 14. In either case, the movable selector raising cams 24 and 25 are immersed.

1 is a block diagram schematically showing a schematic configuration of a flat knitting machine 1 as an embodiment of the present invention. It is a side view which shows an example of a structure of the knitting needle 40 provided in parallel with the needle bed 2 shown in FIG. It is a top view which shows the structure of the carriage 3 of FIG. 1 in detail. It is a cam arrangement | positioning figure which simplifies and shows the structure as the flat knitting machine 71 of other form of implementation of invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,71 Flat knitting machine 2 Needle bed 3,73 Carriage 4 Controller 11, 12, 13 Cam system 14, 15, 16, 17 Needle selection actuator 18, 19 Fixed selection jack lowering cam 20, 21 Movable selection jack lowering cam 22, 22a, 23 Fixed selector raising cam 24, 25 Movable selector raising cam 26, 27, 28, 29 Selectable selector raising cam 30 Position sensor 40 Knitting needle 43 Select jack 44 Selector

Claims (4)

Knitting needles equipped with a selector and select jack for needle selection are juxtaposed on the needle bed, and the carriage is reciprocated in the direction in which the needle bed is juxtaposed with the needle bed in two stages. In a flat knitting machine in which a plurality of cam systems that guide to a position or a track position of the upper position and drive a knitting needle according to each track position are mounted along the moving direction,
A needle selection actuator arranged between the cam systems inside the carriage and at the end of the carriage on the outside of the cam system, and acting on the selector to perform one-stage needle selection;
A fixed selector raising cam arranged adjacent to the outside of the needle selection actuator at the end of the carriage and acting on the selected selector to guide the select jack to the middle track position;
A movable selector that is arranged adjacent to the inside of the needle selection actuator at the end of the carriage and can be switched between action and non-action, and acts on the selector in the selected state at the time of action to guide the select jack to the upper track position. Raising cam,
A select jack lowering cam that is disposed outside the needle selection actuator at the end of the carriage and adjacent to the outer side of the fixed selector raising cam, and forcibly guides the select jack to the lower track position;
Control means for controlling each needle selection actuator and each movable selector raising cam,
The needle selection actuator that is the last in the movement of the carriage with respect to the needle bed performs preliminary needle selection as the first stage of the two-stage needle selection, and after reversing the movement direction, it is adjacent to the needle selection actuator When knitting with the cam system, the needle selection is performed as the second stage of the two-stage needle selection, and when the knitting is not performed with the cam system, control is performed to maintain the needle selection state.
The movable selector raising cam disposed adjacent to the inside of the needle selection actuator is controlled to switch to the operation when performing the main needle selection, and to the non-operation when maintaining the needle selection state.
A flat knitting machine further comprising control means. The needle bed is provided at the front and back so as to face each other across the mouth,
A racking mechanism that shifts the front and back needle beds to the left and right relatively is also provided.
2. The control unit according to claim 1, wherein the movement of the carriage relative to the needle bed includes the movement of the carriage along the needle bed as well as the movement of the carriage caused by a racking mechanism. Flat knitting machine. Two carriages carrying the plurality of cam systems are provided on the needle bed,
The control means includes
With tandem knitting that separates two carriages and operates each carriage independently, controlling each carriage equally,
In a multi-cam knitting operation in which two carriages are connected to operate as a single carriage mounted with the multiple number of cam systems, the needle selection actuator at the end of the preceding carriage is the preliminary needle selection. The needle selection actuator at the head of the carriage on the following side is controlled to maintain the preselected needle selection state,
The flat knitting machine according to claim 1 or 2, characterized by being switchable. Knitting needles equipped with a selector and select jack for needle selection are juxtaposed on the needle bed, and the carriage is reciprocated in the direction in which the needle bed is juxtaposed with the needle bed in two stages. A method of selecting a knitting needle with a flat knitting machine in which a cam system that guides to a position or an upper track position and drives a knitting needle according to each track position is mounted along a moving direction. In
A needle selection actuator that acts on the selector to perform one-stage needle selection is arranged between the cam systems inside the carriage and at the end of the carriage that is outside the cam system.
Next to the outside of the needle selection actuator at the end of the carriage, a fixed selector raising cam that acts on the selector in the selected state and guides the select jack to the middle track position,
A movable selector raising cam that can switch between action and non-action adjacent to the inside of the needle selection actuator at the end of the carriage, and that acts on the selected selector during operation to guide the select jack to the upper track position. And place
A select jack lowering cam that forcibly guides the select jack to the lower track position is arranged outside the needle selection actuator at the end of the carriage and adjacent to the outer side of the fixed selector raising cam.
The needle selection actuator that is the last in the movement of the carriage with respect to the needle bed performs preliminary needle selection as the first stage of the two-stage needle selection, and after reversing the movement direction, it is adjacent to the needle selection actuator When knitting with the cam system, perform the final needle selection as the second stage of the two-stage needle selection, and when not knitting with the cam system, do not change the needle selection state,
The movable selector raising cam arranged adjacent to the inside of the needle selection actuator switches to the operation when performing the main needle selection and to the non-operation when maintaining the needle selection state.
A needle selection method for a flat knitting machine.

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