JP7307580B2 - flat knitting machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a flat knitting machine that is superior in knitting efficiency to conventional flat knitting machines.

A flat knitting machine includes at least a pair of front and rear needle beds, knitting needles arranged in each of a large number of needle grooves arranged side by side in each needle bed, and a carriage reciprocating along the longitudinal direction of the needle beds ( For example, Patent Document 1, etc.). A cam system is mounted on the carriage, and the cam system advances and retreats the knitting needles in the direction along the needle groove to cause the knitting needles to perform a knitting operation such as knitting.

These knitting operations are performed by controlling the operation of the knitting needles by a needle selection actuator provided on the carriage together with the cam system. FIG. 8 is a schematic diagram showing the arrangement of the knitting needles 1 in the needle grooves 2g of the needle bed 2 in the conventional flat knitting machine. FIG. 9 is a schematic diagram of a cam system 100 in a conventional flat knitting machine. FIG. 9 shows a traveling trajectory drawn on the cam system 100 by some butts of the knitting needles when the cam system 100 moves leftward.

As shown in FIG. 8, the needle groove 2g in which the knitting needle 1 is arranged is formed between a plurality of needle plates 2p arranged in parallel on the needle bed 2. As shown in FIG. The knitting needle 1 is prevented from falling out of the needle groove 2g by the wire 2w and the steel strip 2b that pass through the needle plate 2p in the parallel direction. A knitting needle 1 of this example includes a needle body 10 , a needle jack 20 , a select jack 30 and a selector 40 . The needle body 10 has a hook 11 at its tip. The needle jack 20 is a member for advancing and retracting the needle body 10 in the direction in which the needle groove 2g extends, and has two knitting butts 21 and 22 . The select jack 30 is a member for controlling whether the needle jack 20 is advanced or retracted, and has a select butt 31 at its tip. The selector 40 is a member that changes the position of the select jack 30 in the extending direction of the needle groove 2g, and has a lowering butt 41, an raising butt 42, a needle selection butt 43, and a tail portion 44.

On the other hand, the cam system 100 is provided so as to protrude from the cam plate 101, as shown in FIG. FIG. 9 shows a double cam system in which two cam systems 100 are provided on one cam plate 101 . The cam system 100 protrudes toward the front side of the paper perpendicular to the cam plate 101, and the knitting needle 1 in FIG. Hereinafter, the frontward direction of the cam system 100 on the paper surface is defined as the projecting direction, and the upward direction on the paper surface is defined as the tooth mouth direction.

The cam system 100 includes a knitting cam 80 and a transfer cam 81 . The knitting cam 80 includes a needle raising cam, a stitch cam, and the like, and mainly acts on the knitting butt 22 during knitting and tucking. The transfer cam 81 acts on the knitting butt 21 during transfer. The cam system 100 further includes a select jack lowering cam 82, an upper selector guide cam 83, a lower selector guide cam 84, a fixed presser 85, a tack presser 86, a half presser 87, a selector raising cam 88 and a return cam 89. there is The cam plate 101 is also provided with four needle selection actuators 91 , 92 , 93 and 94 .

The knitting needle 1 shown in FIG. 8 receives needle selection in two stages by the needle selection actuators 91, 92, 93, and 94 shown in FIG. The knitting needle 1 is selected by the selector 40 selected by the needle selection actuators 91, 92, 93, 94 by changing the position of the select jack 30 in the extending direction of the needle groove 2g. There are three positions of the select jack 30: the B position, the H position which is closer to the dental mouth than the B position, and the A position which is closer to the dental mouth than the H position. In FIG. 9, each position is indicated by a boxed "B", "H", and "A". On the other hand, the selector 40 can take three positions: a base position corresponding to the B position of the select jack 30, an intermediate position corresponding to the H position, or an extended position corresponding to the A position. In FIG. 9, for the sake of convenience, the base position, middle position and advanced position of the selector 40 are indicated by squared "B", "H" and "A", respectively.

A change in the positions of the select jack 30 and the selector 40 will be described with reference to FIG. Here, an example will be described in which the cam system 100 moves leftward on the paper surface and needle selection is performed by two needle selection actuators 92 and 93 located in the center of the cam plate 101 . 9 shows the trajectory of the selection bat 31 of the select jack 30 (FIG. 8), the lower bat 41, the raise bat 42, and the needle selection bat 43 of the selector 40 (FIG. 8) among the bats related to needle selection. shows the trajectory of

First, the selector 40 at the B position receives the first stage needle selection by the needle selection actuator 92 . When the actuator cam of the needle selection actuator 92 acts on the needle selection butt 43, the tail portion 44 in FIG. 8 rotates toward the needle groove 2g, and the raising butt 42 sinks into the needle groove 2g. Since the lower selector guide cam 84 cannot act on the raising butt 42 thereafter, the selector 40 is maintained at the base position and the select jack 30 is maintained at the B position. The selection butt 31 maintained at the B position is sunk into the needle groove 2g by the fixed presser 85 on its track. Then, the tip of the select jack 30 bends the intermediate portion of the needle jack 20 to sink the knitting butt 22 into the needle groove 2g. Since the knitting cam 80 cannot act on the knitting butt 22, the knitting operation fails. The tail portion 44 of FIG. 8 is returned to the state shown in FIG.

When the needle selection actuator 92 does not act on the needle selection butt 43 , the raising butt 42 is maintained in a state of protruding from the needle groove 2 g and receives the action of the lower selector guide cam 84 . The lower selector guide cam 84 is provided with two raised portions 84a, and the selector 40 is raised to an intermediate position by the raised portions 84a. Then, the tip of the selector 40 pushes up the selection butt 31 of the select jack 30, and the selection butt 31 becomes the H position. The selection bat 31 raised by the second raising portion 84 a maintains the H position, but the selector 40 is lowered to the base position by the upper selector guide cam 83 . By lowering the selector 40 to the base position, the needle selection butt 43 can receive needle selection by the second needle selection actuator 93 .

Next, the selector 40 receives second stage needle selection by the needle selection actuator 93 . When the needle selection actuator 93 acts on the needle selection butt 43, the selector 40 maintains the base position. Since the select jack 30 is not pushed up by the selector 40, it maintains the H position. A half presser 87 and a tuck presser 86 are provided on the track of the selection butt 31 at the H position.

On the other hand, if the needle selection actuator 93 does not act on the needle selection butt 43, the raising butt 42 remains projected from the needle groove 2g and is pushed up by the selector raising cam 88. The selector 40 is raised to the advanced position, and the select jack 30 pushed up by the selector 40 is raised to the A position. The selector 40 is immediately lowered to the base position by the upper selector guide cam 83 . After knitting, the selection bat 31 is lowered to the B position by the select jack lowering cam 82 on the right side of the drawing.

WO2007/074944

In recent years, there has been a demand for further improvements in knitting efficiency in flat knitting machines, and reviews of existing knitting needles, shapes of cam systems, and the like are under consideration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and one of its objects is to provide a flat knitting machine capable of further improving the knitting efficiency as compared with the conventional one.

As a result of examining the above problem, the present inventors focused on the point that the selector once goes down to the base position after going up to the intermediate position through the first stage of needle selection. In such a configuration, when the selector goes up from the base position to the advanced position after the second stage of needle selection, the selector does not push up the select jack at all until it moves from the base position to the intermediate position. state. That is, while the selector is idle, the movement of the selector is wasted, and the wasted movement increases the height of the selector raising cam in the mouth direction (upward direction of the paper surface). Therefore, the inventor thought that the height of the selector raising cam in the tooth mouth direction could be reduced by reducing the free running distance of the selector, and completed the flat knitting machine of the present invention.

The flat knitting machine of the present invention is
at least a pair of front and rear needle beds;
a plurality of knitting needles respectively arranged in a plurality of needle grooves provided in the needle bed;
a cam system that advances and retreats the knitting needles in a direction along the needle groove to cause the knitting needles to perform a knitting operation;
a needle selection actuator that selects the knitting needles,
The knitting needle is
a select jack having a selection butt that receives the action of the cam system and that causes the knitting needles to perform different knitting operations;
a selector that changes the position of the select jack along the needle groove,
The select jack is configured to be arranged in any one of B position, H position, and A position as a result of needle selection by the needle selection actuator,
The selector is arranged at a base position corresponding to the B position, an intermediate position corresponding to the H position, or an advanced position corresponding to the A position,
The cam system is
a fixed presser for sinking the selection bat in the B position into the needle groove;
A flat knitting machine comprising a select jack lowering cam that changes the selection bat from the H position or the A position to the B position,
The select jack is
a first engaging portion with which a portion of the selector that moves from the base position to the intermediate position is engaged;
a second engaging portion engaged with a portion of the selector that moves from the base position to the advanced position;
The cam system is
A switching cam provided along the edge of the select jack lowering cam for sinking the selection butt into the needle groove when switching the selector from the first engagement portion to the second engagement portion. with
The height of the switching cam in the projecting direction is lower than the height of the fixed presser in the projecting direction.

As one form of the flat knitting machine of the present invention,
The select jack includes an overhanging portion projecting from a root portion of the selection bat on the rear end side of the knitting needle toward the rear end side,
the first engaging portion is configured by an end surface of the selection bat on the rear end side,
A form in which the second engaging portion is configured by an end surface of the protruding portion on the rear end side is mentioned.

As one form of the flat knitting machine of the present invention,
a connecting portion provided at an end portion of the fixed presser in the extending direction and adjacent to the switching cam;
The height of the connecting portion in the projecting direction may be the same as the height of the switching cam in the projecting direction.

In the select jack of the flat knitting machine of the present invention, the portion to be engaged when the selector moves from the base position to the intermediate position is different from the portion to be engaged when the selector moves from the base position to the advanced position. there is Therefore, when the selector moves from the base position to the advanced position, the free running distance of the selector can be shortened. As a result, the moving distance from the base position to the advanced position in the selector can be shortened. Shortening the movement distance of the selector means that the height of the selector raising cam that pushes the selector to the advanced position can be made small, so that the length of the cam system in the movement direction can also be made short. Therefore, since the reciprocating stroke of the carriage can be shortened, the knitting efficiency can be improved. Further, since the length of the cam system in the movement direction is shortened, the carriage can be made smaller and lighter, so that the knitting speed can be improved.

Further, in the flat knitting machine of the present invention, the select jack pushed up by the selector and shifted to the H position is sunk into the needle groove by the switching cam provided near the select jack lowering cam, and the depth direction of the needle groove is lowered. The selector and the select jack are separated from each other. At that timing, the selector moves to the base position and advances to the tooth gap side again, so that the selector that is engaged with the first engaging portion of the select jack is changed to the second engaging portion at an appropriate timing. be done. In addition, since it is possible to prevent the selector and the select jack from being caught during the replacement, the possibility of failure in replacement is extremely low.

By providing an overhang at the base of the butt for selection of the select jack and providing both the first engaging part and the second engaging part in the vicinity of the butt for selection, it is possible to stabilize the push-up of the select jack by the selector. . When a position of the select jack near the selection butt is pushed up by the selector, it is possible to suppress rotation of the select jack in a direction in which the selection butt sinks into the needle groove.

A connecting portion is provided at the end of the fixed presser in the extending direction, and the height of the connecting portion in the projecting direction is aligned with the height of the switching cam in the projecting direction. The butt for selection can be smoothly moved from the presser to the switching cam.

FIG. 2 is a schematic diagram showing a state of arrangement of a select jack and a selector in needle grooves among the knitting needles provided in the flat knitting machine of Embodiment 1; 4 is a schematic diagram showing part of the central portion of the double cam system provided in the flat knitting machine of Embodiment 1. FIG. FIG. 3 is a schematic diagram showing the positional relationship between select jacks and selectors at key points in FIG. 2 ; 4 is a schematic diagram showing part of the end portion of the double cam system provided in the flat knitting machine of Embodiment 1. FIG. FIG. 10 is a schematic diagram showing a positional relationship between a select jack and a selector of the flat knitting machine shown in Embodiment 2; FIG. 10 is a schematic diagram showing the positional relationship between a select jack and a selector of the flat knitting machine shown in Embodiment 3; FIG. 12 is a schematic diagram showing part of the cam system of the flat knitting machine shown in Embodiment 4; FIG. 10 is a schematic diagram showing an arrangement of knitting needles in needle grooves of a needle bed in a conventional flat knitting machine. 1 is a schematic diagram of a cam system in a conventional flat knitting machine; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. The flat knitting machine of the present invention differs from conventional flat knitting machines in a part of the knitting needles and a part of the cam system. Components having the same functions as those of the conventional flat knitting machine are denoted by the same reference numerals as in FIGS. 8 and 9, and detailed description thereof will be omitted.

<Embodiment 1>
Among the knitting needles 1 in the needle groove 2g shown in FIG. 1, the configuration of the select jack 3 is different from the conventional one. The select jack 3 includes an overhanging portion 3P that overhangs the rear end side (lower side of the drawing) of the knitting needle 1 from the root portion of the selection butt 31 formed at the tip position thereof. In this select jack 3 , the end surface of the selection butt 31 on the rear end side of the knitting needle 1 functions as a first engagement portion 3</b>A that engages with the tip portion 4</b>F of the selector 4 . The first engagement portion 3A is a portion with which the tip portion 4F of the selector 4 moving from the base position to the intermediate position is engaged. As the first engaging portion 3A is pushed up by the selector 4, the select jack 3 moves from the B position to the H position.

In addition, in the select jack 3 of this example, the end surface of the overhanging portion 3P on the rear end side of the knitting needle 1 functions as a second engaging portion 3B that engages with the tip portion 4F of the selector 4 . That is, the second engaging portion 3B is positioned closer to the rear end of the knitting needle 1 than the first engaging portion 3A and to the bottom surface of the needle groove 2g. The second engaging portion 3B is a portion with which the tip portion 4F of the selector 4 moving from the base position to the advanced position is engaged. As the second engaging portion 3B is pushed up by the selector 4, the select jack 3 moves from the H position to the A position. The separation distance between the first engaging portion 3A and the second engaging portion 3B in the longitudinal direction of the knitting needle 1 is slightly (approximately 1 mm or less) smaller than the distance from the base position to the intermediate position of the selector 4 . Therefore, the switching of the selector 4 from the first engaging portion 3A to the second engaging portion 3B becomes smooth.

On the other hand, the selector 4 of this example has the same configuration as the conventional selector 40 shown in FIG.

Next, the cam system 100 of this example will be described with reference to FIG. FIG. 2 shows only portions of the cam system 100 related to needle selection. In addition, FIG. 2 illustrates an example in which the select jack 3 moves to the H position in the first stage of needle selection, and moves to the A position in the second stage of needle selection. Only the trajectories of the selection bat 31 and the lifting bat 42 at that time are shown in FIG. The cam system 100 of this example differs from the conventional flat knitting machine in the configuration of the fixed presser 5 and the selector raising cam 8 . Further, the cam system 100 of this example includes a switching cam 6 that does not exist in conventional flat knitting machines.

The switching cam 6 is provided along the lower edge of the select jack lowering cam 82 . In this example, the switching cam 6 is separate from the select jack lowering cam 82, but may be integrated. The switching cam 6 includes a body portion 60 parallel to the cam plate 101 (see FIG. 9) and slope portions 61 formed at both ends of the body portion 60 . The height of the body portion 60 of the switching cam 6 in the projecting direction (the front direction of the paper surface) is uniform and is lower than the height of the fixed presser 5 in the projecting direction. The slope portion 61 has an inclined surface that gradually rises from the cam plate 101 toward the main body portion 60 . The width of the body portion 60 is the same as the formation range of the two raised portions 84a, slightly wider, or slightly narrower. By doing so, the body portion 60 can act on the selection butt 31 so that the tip portion 4F of the selector 4 raised by the raising portion 84a does not engage with the second engaging portion 3B. The formation range of the raised portion 84a includes a position where the raised butt 42 contacts the left raised portion 84a, and a position where the raised butt 42 contacts the right raised portion 84a when the carriage moves in the opposite direction of the present example. , is the distance between

The switching cam 6 sinks the selection butt 31 of the select jack 3 (FIG. 1) pushed up by the selector 4 and shifted to the H position into the needle groove 2g. The selection butt 31 is sunk into the needle groove 2g by the switching cam 6 to such an extent that a portion thereof protrudes from the needle groove 2g. As a result, the switching cam 6 separates the select jack 3 and the selector 4 in the depth direction of the needle groove 2g. Details thereof will be described later with reference to FIG.

The fixed presser 5 includes an intermediate portion 50 parallel to the cam plate 101 and connecting portions 51 formed at both ends of the intermediate portion 50 in the extending direction. The connecting portion 51 is lower than the intermediate portion 50 . The height of the connecting portion 51 in the projecting direction is aligned with the height of the switching cam 6 (body portion 60) in the projecting direction. The intermediate portion 50 and the connecting portion 51 are connected by an inclined portion 52 having an inclined surface (indicated by a cross in the figure) that descends from the intermediate portion 50 toward the connecting portion 51 . The communication portion 51 and the inclined portion 52 may be separate from the fixed presser 5 . The protrusion height of the communication portion 51 should be uniform so that the selection butt 31 can move smoothly without being caught on the boundary between the fixed presser 5 and the switching cam 6 . For example, it is preferable that the height difference between the communication portion 51 and the height of the switching cam 6 in the projecting direction is 1 mm or less (including 0 mm).

The selector raising cam 8 has a height in the tooth mouth direction (upward direction of the paper surface) lower than that of the conventional selector raising cam 88 in FIG. This is an effect obtained by forming the first engaging portion 3A and the second engaging portion 3B in the select jack 3 of FIG. If the height of the selector raising cam 8 in the gear tooth mouth direction is low, the knitting cam 80 (FIG. 9) can be brought closer to the select jack lowering cam 82 side. Therefore, the length of the cam system 100 in the moving direction can be shortened, and the reciprocating stroke of the carriage can be shortened. Further, if the length of the carriage in the movement direction is shortened, the weight of the carriage is reduced and the movement speed of the carriage is increased. As a result, the knitting time is shortened and the knitting efficiency is improved.

Here, the height of the selector raising cam 8 in the tooth mouth direction can be, for example, 1 to 1.6 times the height of the raised portion 84a of the lower selector guide cam 84 in the tooth mouth direction. The height of the selector raising cam 8 (raising portion 84a) in the dental mouth direction is determined by using the position where the raising butt 42 in the base position first contacts as a reference position, and the height of the selector raising cam 8 (raising portion 84a) from the reference position. is the distance to On the other hand, the height of the conventional selector raising cam 88 shown in FIG.

Next, referring to FIG. 3, the positional relationship between the select jack 3 and the selector 4 when the select jack 3 moves to the H position in the first stage of needle selection and to the A position in the second stage of needle selection. explain. (A) to (F) in FIG. 3 correspond to the positions of the vertical dashed lines indicated by capital letters A to F in FIG. 2, respectively.

In FIG. 3A, the select jack 3 is at the B position, and the selection butt 31 of the select jack 3 is sunk into the needle groove 2g by the intermediate portion 50 of the fixed presser 5. In FIG. On the other hand, the selector 4 is at the base position, and the tip 4F of the selector 4 does not push up the selection bat 31 .

In FIG. 3(B), the selection butt 31 is located on the inclined portion 52 of the fixed presser 5 and slightly floats above the needle groove 2g compared to the state of FIG. 3(A). A main body portion 60 of the switching cam 6 is present on the tooth mouth direction side (upper side of the drawing) of the inclined portion 52 .

In FIG. 3C, when the selector 4 moves to the intermediate position, the tip portion 4F of the selector 4 pushes up the first engaging portion 3A of the select jack 3, and the select jack 3 moves to the H position. It is arranged on the body portion 60 of the switching cam 6 . A selection butt 31 of the select jack 3 is pushed by the switching cam 6 and is in a state of sinking about half into the needle groove 2g. Therefore, the select jack 3 and the selector 4 are separated from each other in the depth direction of the needle groove 2g (horizontal direction of the drawing).

In FIG. 3D, the selector 4 is once returned to the base position. At this time, since the select jack 3 and the selector 4 are separated in the depth direction of the needle groove 2g, the selector 4 is less likely to be caught by the select jack 3 when the selector 4 moves. Therefore, the select jack 3 does not move unintentionally, and the select jack 3 is maintained at the H position. 3(B) to (D), that is, in the movement interval in which the select jack 3 moves to the H position due to the needle selection in the first stage, the selection butt 31 moves while being sunk in the body portion 60. .

In FIG. 3E, the selection butt 31 has passed the switching cam 6 and is floating above the needle groove 2g. Therefore, the tip portion of the select jack 3 approaches the selector 4 in the depth direction of the needle groove 2g, and the tip portion 4F of the selector 4 is arranged in the vicinity of the second engaging portion 3B of the select jack 3 so as to face it. be.

In FIG. 3F, when the selector 4 moves to the advanced position, the tip portion 4F of the selector 4 pushes up the second engaging portion 3B, and the select jack 3 moves to the A position. Here, as shown in FIG. 3E, when the selector 4 is at the base position, the tip portion 4F of the selector 4 is already close to the second engaging portion 3B of the select jack 3 at the H position. ing. Therefore, in FIG. 3(F), the distance over which the selector 4 idles is very short, and the distance over which the selector 4 is moved from the base position to the advanced position is also short.

Next, the configuration of the switching cam 6 corresponding to the needle selection actuator 94 at the end of the carriage will be described with reference to FIG. At the end of the carriage, the first stage needle selection is performed by the needle selection actuator 94 when the carriage moves leftward on the page. Then, when the carriage reverses and moves rightward on the paper surface, needle selection actuator 94 performs needle selection in the second stage. When the carriage is reversed after finishing the first stage of needle selection, the selector is lowered to the base position by the upper selector guide cam 83 and raised to the intermediate position by the raising part 84a on the left side of the paper surface, and then the second stage of needle selection is started. provided. FIG. 4 shows only the trajectories of the selection butt 31 and the lifting butt 42 in the first stage needle selection.

A switching cam 6 is provided along the edge of the select jack lowering cam 82 also at the end of the carriage shown in FIG. Since the switching cam 6 also allows the switching between the selector jack 3 and the selector 4 described with reference to FIG.

However, at the end of the carriage, the selector 4 that has received the needle selection of the first stage is maintained at the intermediate position. The selector 4 at the intermediate position is supported by a wire 2w as shown in FIG. 3(C), for example. Therefore, even if an operator stops the carriage and touches the selector 4 for maintenance after the first stage of needle selection is completed, the selector 4 does not sink into the needle groove 2g. Therefore, even if the carriage is restarted after the maintenance, the needle selection in the second stage is not hindered.

Here, unlike FIGS. 2 and 4, the first stage needle selection may be performed with the selection butt 31 placed at the H position or the A position. In that case, the selection bat 31 rides on the body portion 60 via the slope portion 61 . Then, it is lowered to the B position by the select jack lowering cam 82 . At this time, the body portion 60 of the switching cam 6 sinks the selection butt 31, and the second engaging portion 3B and the tip portion 4F are shifted in the depth direction of the needle groove 2g. Therefore, when the select jack 3 is lowered to the B position, it is possible to prevent the second engaging portion 3B from colliding and engaging with the tip portion 4F of the selector 4 .

<Embodiment 2>
In the second embodiment, an example in which the shapes of the select jack 3 and the selector 4 are different from those in the first embodiment will be described with reference to FIG. 5B to 5F correspond to the positions of the vertical dashed lines indicated by capital letters B to F in FIG. 2, respectively.

As shown in FIG. 5(B), in the select jack 3 of the present embodiment, of the two-forked rear end portions, the rear end portion on the opening side of the needle groove 2g serves as the first engaging portion 3A. Further, in the select jack 3 of this example, as in the first embodiment, the end surface of the overhanging portion 3P on the rear end side of the knitting needle 1 serves as the second engaging portion 3B.

In FIG. 5C, the selector 4 has moved to the intermediate position. At that time, the first engaging portion 3A of the select jack 3 is pushed up by the engaging projection 45 projecting on the side opposite to the lifting butt 42 (bottom side of the needle groove 2g) in the selector 4. As shown in FIG. As a result, the select jack 3 also moves to the H position. A selection butt 31 of the select jack 3 is arranged on the switching cam 6 .

In FIG. 5D, the selector 4 is returned to its base position. In FIG. 5(E), the selection butt 31 has moved to the position where the switching cam 6 is absent (see vertical broken line E in FIG. 2), so the selection butt 31 floats up from the needle groove 2g. As a result, the tip portion 4F of the selector 4 is engaged with the second engaging portion 3B. The first engaging portion 3A is separated from the engaging protrusion 45 .

In FIG. 5(F), the selector 4 moves from the base position to the advanced position, and the select jack 3 pushed up by the tip portion 4F also moves to the A position. 5(E) and 5(F), it can be seen that even with the configuration of this example, the selector 4 has almost no idling distance.

<Embodiment 3>
In the third embodiment, an example in which the shapes of the select jack 3 and the selector 4 are different from those in the first and second embodiments will be described with reference to FIG. 6B to 6F correspond to the positions of the vertical dashed lines indicated by capital letters B to F in FIG. 2, respectively.

As shown in FIG. 6B, in the select jack 3 of this example, as in the first embodiment, the end surface of the selection butt 31 on the rear end side of the knitting needle 1 serves as the first engaging portion 3A. In addition, the select jack 3 of this embodiment has a projecting second engaging portion 3B formed at a position slightly closer to the A position in the intermediate portion thereof. The second engaging portion 3B protrudes toward the selector 4 side (opening side of the needle groove 2g). On the other hand, the selector 4 is formed with an engaging projection 4p at a position slightly closer to the advanced position in the intermediate portion thereof. When the select jack 3 is at the B position and the selector 4 is at the base position, the engaging protrusion 4p is arranged on the A position side of the second engaging portion 3B. The engaging projection 4p and the second engaging portion 3B are separated from each other in the depth direction of the needle groove 2g.

In FIG. 6C, the selector 4 has moved to the intermediate position. At that time, the first engaging portion 3A of the select jack 3 is pushed up by the tip portion 4F of the selector 4. As shown in FIG. As a result, the select jack 3 also moves to the H position. A selection butt 31 of the select jack 3 is arranged on the switching cam 6 .

In FIG. 6D, the selector 4 is returned to its base position. By returning the selector 4 to the base position, the positions of the engaging projection 4p and the second engaging portion 3B in the needle bed direction are exchanged, and the engaging projection 4p is positioned closer to the rear end side of the knitting needle 1 than the second engaging portion 3B. placed. At this time, the selection butt 31 is pushed by the switching cam 6, and the separation distance between the select jack 3 and the selector 4 is maintained, so that the engaging projection 4p and the second engaging portion 3B are not caught. .

In FIG. 6(E), the selection butt 31 is released from the switching cam 6, and the selection butt 31 rises from the needle groove 2g. At this time, the engaging projection 4p and the second engaging portion 3B are arranged at positions where they can engage with each other in the depth direction of the needle groove 2g. Therefore, the engaging protrusion 4p of the selector 4 is engaged with the second engaging portion 3B. The first engaging portion 3A is separated from the tip portion 4F.

In FIG. 6F, the selector 4 moves from the base position to the advanced position, and the select jack 3 pushed up by the engaging projection 4p moves to the A position. 6(E) and 6(F), it can be seen that even with the configuration of this example, the selector 4 has almost no idling distance.

<Embodiment 4>
In the fourth embodiment, an example in which the shapes of the upper selector guide cam 83, the lower selector guide cam 84, and the select jack lowering cam 82 are different from those of the first embodiment will be described with reference to FIG. The functions of the cams 82, 83, 84 are the same as in the first embodiment.

Only one raised portion 84a is formed in the lower selector guide cam 84 of this example. According to the shape of the lower selector guide cam 84, the upper selector guide cam 83 is configured to have a shape capable of returning the lowering butt 41 to the B position.

On the other hand, the select jack lowering cam 82 has a shape in which the intermediate portion is recessed in the tooth gap direction (upward direction on the paper surface). At both ends of the recessed portion, there are inclined surfaces that rise in the projecting direction (frontward direction of the paper surface) from the intermediate portion toward both ends. The width of the recess, excluding the inclined surface, is the same as, slightly wider, or slightly narrower than the formation range of the raised portion 84a so that the selection bat 31 moving from the B position to the H position does not get caught on the inclined surface. there is Therefore, the selection bat 31 placed at the H position can pass through the select jack lowering cam 82 while maintaining the H position.

The switching cam 6 described in the first embodiment can also be applied to the configuration described above. As in the first embodiment, the switching cam 6 is provided along the edge of the select jack lowering cam 82 and contributes to changing the engagement position between the select jack 3 and the selector 4 .

<Other Examples>
In Embodiments 1 to 4, examples using the mechanical needle selection actuators 91, 92, 93, and 94 having actuator cams have been described. It may be of the electromagnetic attraction type as shown.

1 knitting needle 2 needle bed 2b steel strip 2g needle groove 2p needle plate 2w wire
3 Select Jack 3A First Engaging Part 3B Second Engaging Part 3P Overhanging Part 4 Selector 4F Tip Part 4p Engaging Protrusion 5 Fixed Presser 50 Intermediate Part 51 Connecting Part 52 Inclined Part 6 Switching Cam 60 Body Part 61 Slope Part 8 selector raising cam 10 needle body 11 hook 20 needle jack 21, 22 knitting butt 30 select jack 31 selection butt 40 selector 41 lowering butt 42 raising butt 43 needle selection butt 44 tail 45 engaging protrusion 100 cam system 101 cam plate 80 Knitting cam 81 Transfer cam 82 Select jack lowering cam 83 Upper selector guide cam 84 Lower selector guide cam 84a Raising portion 85 Fixed presser 86 Tuck presser 87 Half presser 88 Selector raising cam 89 Return cams 91, 92, 93, 94 Needle selection actuator

Claims (3)

at least a pair of front and rear needle beds;
a plurality of knitting needles respectively arranged in a plurality of needle grooves provided in the needle bed;
a cam system that advances and retreats the knitting needles in a direction along the needle groove to cause the knitting needles to perform a knitting operation;
a needle selection actuator that selects the knitting needles,
The knitting needle is
a select jack having a selection butt that receives the action of the cam system and that causes the knitting needles to perform different knitting operations;
a selector that changes the position of the select jack along the needle groove,
The select jack is configured to be arranged in any one of B position, H position, and A position as a result of needle selection by the needle selection actuator,
The selector is arranged at a base position corresponding to the B position, an intermediate position corresponding to the H position, or an advanced position corresponding to the A position,
The cam system is
a fixed presser for sinking the selection bat in the B position into the needle groove;
a select jack lowering cam that shifts the selection bat from the H position or the A position to the B position;
a lifting portion that lifts the selector from the base position to the intermediate position;
A flat knitting machine comprising a selector raising cam that pushes the selector from the base position to the advanced position,
The select jack is
a first engaging portion with which a portion of the selector that moves from the base position to the intermediate position is engaged;
a second engaging portion engaged with a portion of the selector that moves from the base position to the advanced position;
The cam system is
A switching cam provided along the edge of the select jack lowering cam for sinking the selection butt into the needle groove when switching the selector from the first engagement portion to the second engagement portion. with
the height of the switching cam in the direction of protrusion is lower than the height of the fixed presser in the direction of protrusion;
The height of the selector raising cam in the tooth mouth direction is greater than the height of the raising portion in the tooth mouth direction.
A flat knitting machine having a ratio of 1 to 1.6 . The select jack includes an overhanging portion projecting from a root portion of the selection bat on the rear end side of the knitting needle toward the rear end side,
the first engaging portion is configured by an end surface of the selection bat on the rear end side,
2. The flat knitting machine according to claim 1, wherein the second engaging portion is configured by an end surface of the overhang portion on the rear end side. a connecting portion provided at an end portion of the fixed presser in the extending direction and adjacent to the switching cam;
3. The flat knitting machine according to claim 1, wherein the height of the connecting portion in the projecting direction is the same as the height of the switching cam in the projecting direction.

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