JP2012087424A - Needle selector of flat-knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a needle selector of a flat-knitting machine in which the appearing pattern of the selector raising cam is not fixed and the multiplicity and the flexibility can be improved.SOLUTION: Each selector raising cam 2 is provided with a bi-stable solenoid 4 as a driving source to be able to appear individually. Since the selector raising cam 2 can be switched for the appearance and disappearance individually instead of being switched according to the fixed appearance pattern in response to the moving direction of the carriage, the machine can deal with various needs for the knitting by changing the combination of the cam system for use.

Description

  The present invention relates to a needle selection device for a flat knitting machine that is mounted on a carriage that reciprocates along a needle bed of a flat knitting machine together with a cam system that drives a knitting needle to perform a knitting operation and selects the knitting needle to be driven.

  Conventionally, in a flat knitting machine, a large number of needle grooves are provided side by side in a needle bed, and a knitted fabric is knitted by selectively driving a knitting needle accommodated in each needle groove. Each knitting needle has a hook on the distal end side and a selector on the proximal end side. The knitting needle is driven by reciprocating the carriage in the direction in which the needle grooves are arranged side by side. The carriage is mounted with a needle selection device that selects a knitting needle to be knitted and a cam system that drives the knitting needle selected by the needle selection device to perform the knitting operation. The needle selection device is provided with a needle selection actuator that selects a selector of a knitting needle to be driven and a selector raising cam that drives the selected selector. The selector is driven to receive the guidance of the selector raising cam in different states according to the selection result by the needle selection actuator.

  A carriage equipped with a plurality of cam systems is provided with a needle selection actuator and a selector raising cam on both sides of each cam system in the traveling direction. The selector raising cams provided on both sides of each cam system are switched in accordance with the traveling direction of the carriage. The raising / lowering pattern of the selector raising cam is driven so as to guide the selector in which the leading side comes out and is in the selected state, and the trailing side is dead and does not guide the selector (see, for example, Patent Document 1).

JP-A-5-156553

  As shown in Patent Document 1, the switching of the selector raising cam according to the traveling direction results in a fixed combination of protrusions and depressions. For example, when two cam systems are installed, a total of four selector-raising cams provided at the front and rear of each cam system are fixed in the order of appearance, immersion, exit, and immersion in the order of exit, exit, exit, and exit. End up. A flat knitting machine equipped with multiple cam systems on the carriage does not necessarily use the entire cam system for each travel stroke of the carriage, and can respond to various knitting requirements by changing the combination of cam systems used. Can be made. However, if the appearance pattern of the selector raising cam is fixed, the knitting is diversified and the degree of freedom is limited.

  An object of the present invention is to provide a needle selection device of a flat knitting machine that can increase the diversification and the degree of freedom without fixing the appearance pattern of the selector raising cam.

According to the present invention, a knitting needle having a hook on the distal end side and a selector on the proximal end side is accommodated in a needle groove provided in parallel with the needle bed, and a cam system for driving the knitting needle to perform a knitting operation is a needle. A flat knitting machine that reciprocates a plurality of carriages so as to face the floor in the direction in which the needle grooves are juxtaposed. The carriage is selected to select a selector for the knitting needles to be driven on both sides of each cam system. In the needle selection device of a flat knitting machine, which is provided with a needle actuator and a selector raising cam that is capable of protruding and retracting with respect to the needle bed side and that drives the selected selector in a protruding state protruding to the needle bed side.
A drive source that is provided for each selector raising cam and generates a driving force for switching in and out of the needle bed side;
A spring provided for each selector raising cam and biasing the selector raising cam so as to protrude toward the needle bed;
A switching mechanism that is provided for each selector raising cam, and that drives the selector raising cam so that it does not protrude toward the needle bed side by the driving force from the drive source, or switches between protrusions and depressions by the biasing by the spring. ,
It is the needle selection device of the flat knitting machine characterized by including.

In the present invention, the drive source is a bistable solenoid.
It is characterized by that.

Further, in the present invention, the drive source and the selector raising cam are provided at an interval,
The switching mechanism is provided between the drive source and the selector raising cam, receives a driving force from the drive source on the drive side arm extending from the swing fulcrum to the drive source side, and moves from the swing fulcrum to the selector raising cam side. An extended driven arm includes a lever engaged with the selector raising cam;
It is characterized by that.

  According to the present invention, for each selector raising cam, a drive source that generates a drive force for changing the appearance of the needle bed to the needle bed side, a spring that biases the selector raising cam to project, and a changeover of the selector raising cam are performed. Switching mechanism. Since the raising and lowering of the selector raising cam can be individually switched by the driving force from the driving source via the switching mechanism, it is possible to increase the diversification and the degree of freedom without fixing the raising and lowering pattern. Since the protrusion of the selector raising cam is performed by the spring, the load received when the selector raising cam acts on the selector can be absorbed by the spring.

  In addition, according to the present invention, a bistable solenoid that supports both ends of the movable iron core with bearings is used as a drive source for raising and lowering the selector raising cam, so that durability is improved and drive force is reliably generated even when operation is frequent. Can be made.

  Further, according to the present invention, the selector raising cam that receives the driving force from the driving source on the driving side arm of the lever and is coupled to the driven side arm does not protrude against the urging to the protruding side by the spring. Can be driven. Even if the driven side of the lever is pushed by the load received by the selector raising cam when protruding, the lever swings so that the driving side is separated from the driving source, so that the influence on the driving source can be avoided.

FIG. 1 is a cam layout diagram of a carriage including a needle selection device 1 as an embodiment of the present invention. 2 is a plan view, a left side view, a front view, and a bottom view of the selector raising cam 2 used in the needle selection device 1 of FIG. FIG. 3 is a plan view, a left side view, and a front view showing the configuration of the needle selection device 1 of FIG. FIG. 4 is a left side sectional view showing the operation of the needle selection device 1 of FIG.

  Hereinafter, in FIG. 1, a needle selection device 1 of a flat knitting machine as an embodiment of the present invention is shown mounted on a carriage. In FIG. 2, the structure of the selector raising cam 2 provided in the needle selection apparatus 1 of FIG. 1 is shown. In FIG. 3, the structure of the needle selection apparatus 1 of FIG. 1 is shown. In FIG. 4, operation | movement of the needle selection apparatus 1 of FIG. 3 is shown. In each figure, corresponding parts are denoted by the same reference numerals, and redundant description may be omitted. Further, reference numerals that are not attached to the drawings to be described may be referred to and those that are added to the above-described drawings may be referred to.

  In FIG. 1, four needle selection devices 1A, 1B, 1C, and 1D are shown in a state where they are arranged. Since each needle selection device 1A, 1B, 1C, 1D basically has an equivalent configuration, when referring to an equivalent component, they are collectively referred to as the needle selection device 1. The needle selection device 1 includes a selector raising cam 2, a switching mechanism 3, a bistable solenoid 4, and a spring 5. The switching mechanism 3 includes a lever 6. Each needle selection device 1 also includes a needle selection actuator 7. The needle selection actuator 7 has a needle selection claw 8 and performs a needle selection action depending on whether or not the needle selection butt of the selector is pressed to sink the selector in the needle groove. The selector raising cam 2 has an action slope 2a that acts on the advance bat of the selector floating in the needle groove in a state of protruding toward the needle bed and moves to a position different from the sinking selector. Between the needle selection devices 1A and 1B and between the needle selection devices 1C and 1D, selector floating cams 9 for floating all the selectors in the needle grooves are provided.

  The four needle selection devices 1A, 1B, 1C, 1D are arranged on a cam plate 10 provided on the surface where the carriage faces the needle bed. The cam plate 10 is also provided with two cam systems 11A and 11B for driving the knitting needles according to the needle selection state by the needle selection devices 1A, 1B, 1C and 1D. The cam systems 11A and 11B are arranged along the traveling direction of the carriage. Three or more cam systems may be mounted on the carriage. The plurality of cam systems do not necessarily have the same configuration, and there are cases in which stitch formation and transfer are divided and dedicated cam systems are provided.

  The needle selection device 1 is disposed on both sides of each cam system along the traveling direction of the carriage, and two stages of needle selection are performed between the cam systems using the two needle selection devices 1. In the case of FIG. 1, needle selection devices 1A, 1B; 1C, 1D are arranged on both sides of the cam systems 11A, 11B, respectively. The needle selection devices 1A and 1C arranged on the left side of the cam systems 11A and 11B and the needle selection devices 1B and 1D arranged on the right side are configured in the same manner. The left and right needle selection devices 1A and 1C and the needle selection devices 1B and 1D are configured to be plane-symmetric with respect to a plane perpendicular to the drawing and extending in the vertical direction.

  On the action slope 2a of the selector raising cam 2, the advance bat of only the selector that is floating in the needle groove after the selection of needles in both the first and second stages is acted on. A selector that has selected needles in the first stage and has not selected needles in the second stage receives the action of the guide portion 12a of the selector guide cam 12 after the first stage of needle selection, but does not receive the action of the action slope 2a. The selector which is not selected at the first stage and sinks into the needle groove is not affected by the guide portion 12a. The result of the action on the selector is reflected as a knitting needle on the advance position of the select jack arranged in front of the selector. When needles are selected in both stages, the selector is subjected to the action of the guide portion 12a after the first stage of needle selection, but the action of the action slope 2a is reflected as the advance position of the select jack. Therefore, in the two-stage needle selection, the selector can be divided into three states: a state receiving the action of the action slope 2a, a state receiving only the action of the guide part 12a, and a state not receiving the action of the guide part 12a. The three states can be reflected in the three positions as the advance position of the select jack, and can correspond to, for example, knit, tack, and mistake regarding the stitch forming operation as a knitting needle.

  Assume that one side of FIG. 1, for example, the left side cam system 11A is used and the other side right side cam system 11B is not used. When the carriage moves leftward, if the carriage moves leftward to a position 13a where the selector floating cam 9 between the needle selection devices 1C and 1D provided on both sides of the cam system 11B reaches the end of the knitting width, Two needle selection devices 1C and 1B are used to select needles in two stages, and the knitting needle select jack is divided into three forward positions and selectively driven by the cam system 11A.

  Here, the cam system 11B is switched so that the selector raising cam 2 does not protrude even when the needle selection device 1C is on the leading side when it is on the left. Even when the needle selection device 1B performs the first stage of needle selection for the cam system 11A at the time of the left row, the selector selector cam 2 in the depressed state does not break the needle selection state in the needle selection device 1C. It only has to be pulled out to the position 13b. In the next right-hand row, the knitting needle is selectively driven by the cam system 11A while performing the second stage of needle selection by the needle selection device 1B. The clearance can be reduced by the difference 14 from the position 13a to the position 13b to shorten the carriage travel stroke. Since the selector raising cam 2 can be switched in and out independently according to the pattern that is fixed according to the traveling direction of the carriage, it is possible to change the combination of cam systems to be used. Can respond to requests.

  2 shows the configuration of the selector raising cam 2 used in the needle selection devices 1B and 1D of FIG. 1, in which (a) is a plane, (b) is a left side, (c) is a front, and (d) is a bottom. , Respectively. The selector raising cam 2 shown in FIG. 1 corresponds to the configuration from the bottom of FIG. In the selector raising cam 2, a working slope 2a is provided in the lower part, and a driving part 2b is provided in the middle part. A drive groove 2c is formed in the drive unit 2b. A sliding portion 2 d is provided on the upper portion of the selector raising cam 2. A spring receiving hole 2e is formed in the sliding portion 2d.

  FIG. 3 shows the configuration of the needle selection device 1 of FIG. 1 from the plane in (a), the left side in (b), and the front in (c) on the side of the needle selection devices 1B and 1D. The needle selection devices 1A and 1C are symmetrical with respect to FIGS. 2 (a) and 2 (c) and FIGS. 3 (a), 3 (c) and 3 (d) regarding the needle selection device 1 and the selector raising cam 2. It is configured.

  The switching mechanism 3 is a cam plate 10 and is provided on the back side of FIG. The bistable solenoid 4 is held by the drive side holder 15. The spring 5 is accommodated in a cylinder 16 b provided in the spring holder 16 a of the driven side holder 16. The lower part of the spring 5 is inserted and held in the spring receiving hole 2e of the selector raising cam 2. The movable iron core 4a of the bistable solenoid 4 is supported at its lower part and upper part by two bearings 4b and 4c, respectively, and is switched in and out according to energization of the two coils 4d and 4e. FIG. 3 shows a state in which the movable iron core 4a is rising. If the energization state is changed, the movable iron core can be lowered by 4a. As the drive source, for example, a monostable solenoid can be used. However, by using the bistable solenoid 4 as a drive source, bearings 4b and 4c are provided on both sides of the movable iron core 4a, and durability is improved. Therefore, even if the operation is frequently performed, the selector raising cam 2 is The driving force that appears and disappears can be generated stably and reliably.

  The distal end of the movable iron core 4 a is in contact with the distal end of the drive side arm 6 a of the lever 6. The tip of the driven arm 6b of the lever 6 is inserted into and engaged with the drive groove 2c of the drive part 2b of the selector raising cam 2. The lever 6 is supported by the driven-side holder 16 by an intermediate support portion 6c between the driving-side arm 6a and the driven-side arm 6b, and can be oscillated and displaced. When the driving side arm 6a receives a pressing force from the movable iron core 4a of the bistable solenoid 4 as a driving source, the driving unit 2b of the selector raising cam 2 coupled to the driven side arm 6b is driven upward. As a result, the selector raising cam 2 can be driven so as to be immersed in the cam plate 10 against the biasing of the spring 5 toward the protruding side. In a state in which the movable iron core 4 a does not press the drive side arm 6 a of the lever 6, the selector raising cam 2 protrudes downward from the cam plate 10 by urging by the spring 5. In this state, when the selector raising cam 2 receives an excessive load or impact and the driven arm 6b of the lever 6 is pushed upward, the load or impact can be absorbed by the spring 5. Furthermore, since the drive side arm 6a of the lever 6 swings downward away from the tip of the movable iron core 4a, the influence on the bistable solenoid 4 and the impact of the impact can be avoided.

  4 shows the operation of the needle selection device 1 of FIG. 1, in (a) when the selector raising cam 2 projects from the cam plate 10 toward the needle bed, and in (b) the selector raising cam 2 is It is shown as an inactive state that immerses near the surface.

  The needle selection device 1 can use a driving source different from the bistable solenoid 4, for example, a monostable solenoid or a motor. Although the lever 6 is used for the switching mechanism 3, a wedge-shaped member having a rising slope at the tip side is caused to enter the drive groove 2 c provided in the drive portion 2 b of the selector raising cam 2 to be lifted, and springed if it is retracted. It is also possible to use a configuration that lowers the force. Further, the switching mechanism 3 may be a wire-like member that is pulled up by a drive source so that the selector raising cam 2 is immersed in the cam plate 10.

1, 1A, 1B, 1C, 1D Needle selection device 2 Selector raising cam 2a Working slope 3 Switching mechanism 4 Bistable solenoid 5 Spring 6 Lever 7 Needle selection actuator 10 Cam plate 11A, 11B Cam system

Claims (3)

A knitting needle having a hook on the distal end side and a selector on the proximal end side is accommodated in a needle groove arranged in parallel with the needle bed so that a cam system that drives the knitting needle to perform a knitting operation faces the needle bed A needle knitting machine that reciprocally travels a plurality of carriages mounted in the needle groove side-by-side direction, and the carriage includes a needle selection actuator that selects a selector of a knitting needle to be driven on each side of each cam system, and In the needle selection device of a flat knitting machine, which is capable of appearing and retracting with respect to the needle bed side and is provided with a selector raising cam for driving the selected selector in a protruding state protruding to the needle bed side,
A drive source that is provided for each selector raising cam and generates a driving force for switching in and out of the needle bed side;
A spring provided for each selector raising cam and biasing the selector raising cam so as to protrude toward the needle bed;
A switching mechanism that is provided for each selector raising cam, and that drives the selector raising cam so that it does not protrude toward the needle bed side by the driving force from the drive source, or switches between protrusions and depressions by the biasing by the spring. ,
A needle selection device for a flat knitting machine, comprising: The drive source is a bistable solenoid;
The needle selection device for a flat knitting machine according to claim 1. The drive source and the selector raising cam are provided at an interval,
The switching mechanism is provided between the drive source and the selector raising cam, receives a driving force from the drive source on the drive side arm extending from the swing fulcrum to the drive source side, and moves from the swing fulcrum to the selector raising cam side. An extended driven arm includes a lever engaged with the selector raising cam;
The needle selection device for a flat knitting machine according to claim 1 or 2.

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