JP2000328403A - Yarn feed shifting apparatus for knitting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn feed shifting apparatus for a knitting machine which is designed so that plural yarn guides can be moved to a working position or a resting position. SOLUTION: In a yarn feed shifting apparatus for a knitting machine provided in Japanese Examined Patent Publication No.3-72740, one additional stud 174, 184, 194 or 204 is placed in each of movable members 170, 180, 190 and 200, and when a movable member moves to a higher position, the additional stud is made to come to the same level of at least one of movable fingers or not to come to the same level by movable fingers of a selection apparatus 90 which freely select the additional stud, and thereby it becomes possible that each of the yarn guides 13, 14, 15 and 16 is moved to a working position or to a resting position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn feed switching device for a knitting machine, and more particularly, to Japanese Patent Publication No.
This is an improved invention of the yarn feed switching device for knitting machines provided in No. 72740.

[0002]

2. Description of the Related Art According to the above Japanese Patent Publication No. 3-72740,
As shown in FIG. 10, four movable members 130, 140, and 150 are represented by reference numeral 160 (hereinafter, reference numerals used in the description of the related art are reference numerals used in the publication). , 160 are provided. Guide studs 131, 141, 151, 161 and control studs 132, 142, 152, 162 are provided in portions of these movable members facing the inside of the knitting machine, and selected studs 133, 143, 153, 163 are provided.
Are attached, and additional studs 134, 135,
136; 144, 145, 146; 154, 155, 1
56; 164, 165, 1166 are provided. Also, a single return stud 1 is located on the part facing the outside of the knitting machine.
37, 147, 157, 167 are provided. Selection of the selection stud and the additional stud of the movable member is performed by selectively pulling the selector on the electromagnet downward.

[0003]

In the above prior art, each additional stud is not at the same level as the three selectors when the movable member moves to a higher position. When the selectors move downward, i.e. when selected by electromagnets, each additional stud will be at the same level as these selectors. In other words, when the yarn guide is moved from the operating position to the inoperative position, any one of the yarn guides in the other inoperative positions is always moved to the operating position. For this reason, it is not possible to add another thread guide to the thread guide that has been moved to the operating position and move it to the operating position, and it is also possible to move all thread guides to the inoperative position. There are drawbacks that cannot be made.

It is an object of the present invention to provide a yarn feed switching device for a knitting machine which enables a plurality of yarn guides to be moved to an active position or a non-active position.

[0005]

According to the present invention, by changing the arrangement of the additional stud with respect to the selected stud of the movable member, the yarn guide can be freely moved to the operating position and the inoperative position.

[0006]

In order to achieve the above-mentioned object, a yarn feed switching device for a knitting machine according to the present invention comprises a plurality of yarn guides selectively moving between a non-operation position and an operation position. Having a selection device for program-controlling the yarn guide,
One end of the thread guide is one of a two-arm lever with a fulcrum pivoted.
One arm, and the other arm of the two-arm lever is connected to a movable member, and the lower end of the movable member is movable radially and vertically in an annular guide portion of a U-shaped groove, A control stud, a selection stud, and an additional stud are provided on a portion of the movable member facing the inside of the knitting machine, and a return stud is provided on a portion facing the outside of the knitting machine. A concave portion having an inclined portion for pushing up a control stud of the movable member; and a return cam having an inclined portion for pushing down a return stud of the movable member, wherein the U-shaped groove is provided. Is provided with a forward cam for pressing the movable member inside the knitting machine, and has one or more movable fingers selectively controlled by the selection device, and the movable finger is In the yarn feed switching device for a knitting machine, which is provided with a yarn holding / cutting device that selectively acts on a material selection stud and holds and cuts a yarn individually corresponding to the yarn guide, A movable finger of a selection device for providing one additional stud on the member and for freely selecting the additional stud, the additional stud being at the same level as at least one of the movable fingers when the movable member moves to a higher position, or The thread guides can be moved to an operating position and a non-operating position by preventing them from being at the same level.

Preferably, the selection device comprises a bimorph type ceramic actuator.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a main part of a circular knitting machine, and FIGS. 2 and 3 are longitudinal sectional views thereof. In these figures, reference numeral 1 indicates a rotating cylinder. A cylinder needle 2 slidable in a needle groove extending in the axial direction is accommodated in the outer periphery of the cylinder 1.

During knitting, the dial needle 3 cooperating with the cylinder needle 2 is disposed horizontally, and is slidable in the dial 4 in the radial direction.

The rotary cylinder 1 is fixed to a large driving gear rotatably accommodated in a bed (not shown), and the dial 4 is a needle dial hub 5.
It is connected to. These cylinders 1 and dial 4 rotate at the same speed when driven from a drive source usually arranged in the machine.

The cylinder needle 2 is moved by a cam (not shown) fixed to a cylinder cam holder 6.
The dial needle 3 is operated or controlled in a usual manner by a cam (not shown) fixed to a dial cam holder 8 provided outside the dial cap hub 7.

The apparatus of each component will be described below.
It is almost the same as each configuration of No. 2740. Therefore, only the outline of the yarn switching device and the yarn holding / cutting device will be described except for the improved portion, and the detailed description in the present specification will be omitted because the title of the document is specified for the others.

FIG. 1 shows two yarn switching devices 12, 12A.
Are shown, and four yarn guides 13, yarn guides 14, yarn guides 15, and yarn guides 1, each guiding four separate yarns
6, a finger 17 (17a, 17b, 17c, 17d) extending inward at substantially the center of each thread guide, and a thread guide thread 18 (at the free end of the thread guide finger 17). 18a, 18b, 18c, 18d) are provided. These thread guides 13, 14, 15, 16 selectively move between a lower or inactive position and an upper or active position, so that the yarn is transferred from the thread 18 of the yarn guide to the needle via the yarn carrier 9. Supplied.

In FIG. 1, a yarn guide 1 of a yarn switching device 12 is shown.
Only the thread 3 and the thread guide 16 of the thread switching device 12A are in the active position, their thread 18 being above the level of the dial needle 3. The other thread guides are in the inoperative position and their thread 18 is below the level of the dial needle 3.

It is the yarn guide 1 that holds and cuts the yarn.
Thread holding / cutting device 1 provided in 3, 14, 15, 16
9, the yarn holding / cutting device 19 includes a movable blade 20
And a fixed blade 22 is provided between the fixed blade 22 and the yarn catcher 21. Movable blade 20 and yarn catcher 2
1 is rotatable as shown in FIGS.

When the yarn catcher 21 is opened by the mechanism described later, the yarn is held between the yarn catcher 21 and the fixed blade 22, and thereafter, the yarn is cooperated by the movable blade 20 and the fixed blade 22. Is disconnected.

The movable blade 20 and the yarn catcher 21 have two arms 25a, 25b, 27a, 2 respectively.
7b is formed to constitute a bell crank so as to be able to pivot. One arm 25a, 25b can contact a claw 26 provided on the yarn guides 13, 14, 15, 16, and the other arm 27a, 27
b is movable between a pin 29 and a vertical edge of a slider 28 disposed immediately below the movable blade 20, the yarn catcher 21, and the fixed blade 22. The slider 28 is slidable in the groove 33 of the slider guide 32, and its sliding range is determined by the pin 31 and the slot 30 of the slider engaged with the pin.

The movable blade 20, the yarn catcher 2
1, the fixed blade 22 and the slider 28 are accommodated in the same groove formed in the slider guide 32, as shown in FIG.

The slider guide 32 is attached to a striper ring 37 which extends from the dial cap hub 7.
It is attached to up to six ring holders 38.

Referring again to FIGS. 3 and 5, the claw 26 is rotatably supported by each thread guide, and the thread guides 13, 14, 1 are supported by springs 40.
5 and 16 are in pressure contact with the projections 41. As the yarn guide moves from the inoperative position to the operating position, these claws 26 abut the arm 25a of the movable blade 20 and the arm 25b of the yarn catcher 21. At this time, since the claw 26 rotates against the spring 40, the movable blade 20 and the yarn catcher 21 are not opened.

Conversely, when the yarn guide is moved from the operating position to the non-operating position, the claw 26 also moves the arm 25a of the movable blade 20 and the arm 25b of the yarn catcher 21.
Abut. However, at this time, since the rotation of the claw 26 is prevented by the projection 41 of the yarn guide, the claw pushes down the arms 25a and 25b, and opens the movable blade 20 and the yarn catcher 21.

The thread guides 13, 14, 15, and 16 can slide in a longitudinal direction on a grooved piece 42 provided outside the slider guide 32. The thread guide is fixed to the upper end of the thread guide so as to be detachable from one end of the link member 13a, 14a, 15a, 16a.

A thread 1 for passing a yarn from one position to another position
The movement of the thread guides 13, 14, 15, 16 with 8 is determined by a pin 45 and a slot 44 of the thread guide engaging with the pin 45.

Referring to FIG. 4, the grooved piece 42 can be slid in the longitudinal direction. A channel type member 46 is provided below the thread guide, and sliding members 47 and 48 are attached to both sides of the member 46. Sliding members 47, 48
Are guide grooves 52 formed in the inner surfaces of the plates 50 and 51,
53 can be slid up and down. The sliding members 47, 48
The channel member 46 and the sliding member 4
The pins 54 are inserted through the pins 7 and 48. This pin 54
A spring 56 is provided between the pin and the pin 55 inserted in the side plates 34 and 35.

When the yarn is to be passed through a certain yarn guide, for example, 13, the yarn guide is set to the operating position, and as shown in FIG. 4, the connection between the yarn guide 13 and its link member 13a is released. The channel member 46 is pulled down to release the lower end of the thread guide from the pin 57 which is in contact with the inner edge of each thread guide.
Flip 3 forward. In order to do so, the end of the link member is a semicircular part with a circular part cut out.
There is no obstacle in the thread 18a of the thread guide 13 that has been fallen forward, so that the thread can be passed very easily.
The thread guide 13 having passed the thread can be easily returned to the original position by performing the above-described reverse operation.

Referring now to FIG. 5, the cylinder 1 is provided with a cutter cam 61 corresponding to the slider 28. The cutter cam has an inclined portion 62 that pushes the slider 28 outward with the rotation of the cylinder 1 when the slider 28 is pushed inward as indicated by a two-dot chain line. This cutter cam 61
Is attached to the cylinder 1.

When the yarn guide is moved from the operating position to the inactive position, the claw 26 moves the arm 25 of the movable blade 20 as the thread passing through the thread 18 of the yarn guide 16 descends.
The movable blade 20 and the yarn catcher 21 are opened by abutting against the arm 25b of the yarn catcher 21 and the arm 25b. Then, the yarn is guided to the opened movable blade 20 and the yarn catcher 21. Next, when the cutter cam 61 pushes the slider 28 outward with the rotation of the cylinder 1, the vertical edge of the slider 28 pushes the arm 27b of the yarn catcher 21 outward. The yarn catcher 21 has a shaft center pin 23.
, And closes while catching the yarn. In this state, the yarn is pressed and held between the yarn catcher 21 and the fixed blade 22. Then, movable blade 2
0 is closed slightly later, and the thread is cut in cooperation with the fixed blade 22.

A trapper section 65 is provided above the cutter cam 61 in the cylinder 1. The yarn caught in the notch 67 is guided to the slit 11 through the front surface of the yarn guide portion of the yarn carrier 9 as the cylinder 1 rotates, and is reliably fed to the needle.

As shown in FIG. 5, when the yarn guide 16 is moved from the operating position to the inactive position, any one of the yarn guides 13, 14, 15 in the other inactive positions is moved to the operating position. Moved to. FIG. 5 shows a state in which the yarn guide 13 has been moved. The yarn passed through the thread 18d of the yarn guide 16 at the inoperative position is cut and held by the holding / cutting device 19 as described above.

Link members 13a, 14a, 14a, 16a connected to the respective thread guides 13, 14, 15, 16
As shown in FIG. 2, grooved pieces 70, 71 of a housing 69 provided above the dial cam holder 8.
Can slide in the longitudinal direction. Link members 13a, 1
As described above, the link guides 4a, 15a, and 16a can be disengaged from each other, but in order to do so, the end of the link member is a semicircular portion with a circular part cut away. Each housing 69 has a holder 7 fixed to the dial cap hub 7.
3 and the housing 6 about a shaft 74.
9 can be moved up and down above the holder 73. The holding member 73 is provided with a columnar body 75 penetrating into the needle dial hub 5 and extending downward. Outside the dial cam holder 8, a lower end of a housing 69 is detachably held on a holder 16 of the yarn carrier 9.

The movement of the link members 13a, 14a, 15a and 16a for moving the thread guide from one position to another position is performed by the pin 80 and the long hole 79 of the link member engaged with this pin.
Determined by Link members 13a, 14a, 15
The other ends of the a and 16 a are attached to one arm 82 of a two-arm lever 81 pivotally supported by a shaft 74, and the other arm 83 is a pedestal for the upper end of the movable member 200. The shaft 74 is provided with a grooved block 84. The grooved block 84 accommodates a part of the two-arm lever 81.

The movable member, which is a feature of the present invention, is represented by the reference numeral 200, but the four yarn guides 13, 14, 1
5 and 16, corresponding to the four movable members 170, 180, 1
90 and 200 are provided. (See FIGS. 6, 7 and 2) These movable members are vertically disposed on the dial cap hub 7 and are suspended within the cylindrical body 75 of the holder 73. The lower ends of these movable members can be swung in the radial direction without affecting the position of the thread guide, and slide vertically when the thread guide moves from one position to another. I can do it.

FIG. 6 shows the movable members 170, 180, 190,
FIG. 7 shows an attached state of the lower end portion of FIG.
FIG. 3 is a diagram showing only the movable member extracted. Guide studs 171 and 18 are provided on the movable member facing the inner surface of the knitting machine.
1,191,201 and control studs 172,18
2, 192, 202 are provided and selection studs 173, 183, 193, 203 are mounted.
One additional stud 174, 184, 194, 2
04 is provided. A single return stud 175, 185, 195, 205 is provided on the outside facing part of the knitting machine. The specific arrangement and operation of these types of studs will be described in detail below in connection with the selection device.

As shown in FIG. 2, the selection device 90 includes a plate 9 connected to the base of the needle dial hub 5.
1 on a vertical block 92. As shown in detail in FIG. 9, the outer surface of the vertical block 92 is provided with an outer rim 93. A piezoelectric needle selecting device 94 using a known bimorph type ceramic actuator is fixed to the concave groove 92a on the vertical block 92.

The piezoelectric needle selecting device 94 is provided with four fins -94a, 94b, 94c and 94d.
An inner rim 96 is fixed to the vertical block 92 slightly below the intermediate portion so as to face the outer rim 93. An annular U-shaped groove 97 is formed by the inner rim 96, the outer rim 93 and the bottom surface of the cut vertical block 92.

The movable member 170 attached to the yarn guide,
The lower ends of 180, 190, and 200 are provided with the U-shaped grooves 97.
It can move radially and vertically within. Also,
A block 98 having a U-shaped cross section is mounted and fixed on the upper portion 92b of the vertical block 92. The guide stud 17 of the movable member is provided in a groove portion of the U-shaped block 98.
A regulating block 99 for regulating the movement of 1,181,191,201 is fixed.

As shown in FIG. 6, the U-shaped groove 97
Is formed so as to come into contact with the lower edge of the return studs 175, 185, 195, 205 of the movable member, and when the movable member is in the lower position and at the lower end of the movable member. Is located near the outside of the knitting machine, the respective thread guide is in the inoperative position. On the other hand, when the movable member takes a high position and its lower end is near the center of the knitting machine, the annular groove 97
Of the inner rim 96 at this point contacts the lower portions of the control studs 172, 182, 192, 202 so that the respective thread guides are in the operating position.

The inner rim 96 constituting the U-shaped groove is provided with a bottom-shaped recess 100. The recess 100 is deeply formed so that the lower edges of the control studs 172, 182, 192, and 202 come into complete contact with each other. The upwardly inclined portion 101 of the bottom of the ship has movable members 170, 180, 19
The control cam raises 0,200 to a higher position.
Further, the outer rim 93 is opposed to the bottom portion of the bottom of the ship.
A forward cam 102 shown by a two-dot chain line is fixed to
Acting on the lower end of the movable member, this lower end is pressed radially towards the center of the knitting machine, whereby the respective lower control stud is arranged in the recess 100.

A return cam 103 indicated by a two-dot chain line is fixed to the upper end of the outer rim 93 of the U annular groove 97. The return cam 103 has an inclined portion 104 formed therein.
The angle between the inclined portion 104 and the inclined portion 101 of the concave portion 100 is about 90 degrees. The inclined portion 104 is provided with the return stud 175 of the movable member in the high position, that is, the operating position.
Acting on 185, 195, 205 return the movable member to the low position.

Movable members 170, 180, 190, 200
And therefore the selection of the thread guide to which the movable member is attached, is determined by the four movable fingers 94a, 94b,
This is caused by 94c and 94d. Each movable finger 9
4 has an inclined portion 1 as shown in FIG.
07 is provided to act on the selection stud of the movable member, as described below. When the movable finger is engaged with the movable member, the size that can be displaced in the vertical direction depends on the space of the window (not shown) of the movable finger that projects from the front end of the piezoelectric needle selecting device 94. It is determined by the size.

It is the ceramic actuator that selects and controls the movable fingers. When a positive voltage (+) and a negative voltage (-) are applied to the ceramic actuator, the movable finger is moved upward or downward. That is, in order to move the movable finger upward or downward, it is necessary to read an information program carried by the fixed program device via an electric wire (not shown).

Control studs 172, 182, 192, 2
02 are located at the same level, but the selected studs 173, 183, 193, 203 are located at different levels for one movable member and another. When the thread guide is in the inoperative position, these studs are connected to the four movable fingers 94a, 94b, 94c, 94.
It corresponds to each level of d. Also, sufficient vertical space is provided between these four studs so that they do not come into contact with the movable fingers as they move down under the action of the corresponding ceramic actuator.

Next, the operation of the yarn switching device will be described with reference to FIGS. The selection device 90 carried by the needle dial hub 5 moves in the direction of the arrow. If all four thread guides are in the inoperative position, the lower end of each movable member engages the annular U-shaped groove 97. Forward cam 102
Presses the four movable members toward the center of the knitting machine, the respective control studs 172, 182, 192, 202
Is adapted to engage the horizontal portion of the recess 100 of the inner rim 96. The movement of the ceramic actuator selectively energized by the information program, for example, positions a particular movable finger 94c downward.

When the needle dial hub 5 rotates, the movable finger 94c passes under the corresponding selection stud 193, and the movable member 190 remains at the same position. The control stud 192 then engages the ramp 101 and slides on the inner rim 96 forming the annular U-shaped groove 97. Movable member 1
As the 90 moves upward, the thread guide 15 connected to this movable member also moves, the thread guide is placed in the operative position and the thread is fed to the needle of the knitting machine. On the other hand, the other three selection studs 173, 183, 203
a, 94b and 94d, and the movable member 170,
180, 200 return to the initial position, so that the thread guides 13,
14 and 16 remain in the inoperative position.

Movable members 170, 180, 190, 200
One additional stud 174, 184,
The usage and arrangement of 194, 204 are described. One additional stud for each movable member is located between the lower control stud and the selected stud, such that when the movable member moves to a higher position by the upwardly inclined portion 101, these additional studs are lowered. It is at the same level as one of the positioned movable fingers. If these movable fingers move upward, i.e. if selected by a ceramic actuator, the additional studs will not be at the same level as these movable fingers.

When a new movable finger 94d is selected, by applying a voltage to the ceramic actuator,
The case of being moved downward will be described. The movable member 190 selected in the previous operation is held at a high position during the rotation of the needle dial hub 5, but the other three movable members 17
0,180,200 are again pressed towards the center of the knitting machine under the action of the advance cam 102. When the movable finger passes, the selected studs 173, 1 of the movable members 170, 180
Although only 83 is pushed back by the movable fingers 94a and 94b, the movable member 200 is not acted on by the movable finger 90d, comes into engagement with the upwardly inclined portion 101, and the corresponding thread guide 16 moves to the operating position. The new thread is supplied to the needle. On the other hand, when a voltage is applied to the ceramic actuator, for example, when the movable finger 94c is moved downward, the additional stud 194 of the movable member 190 that has been raised previously is pushed back, and this additional stud is directed outward of the knitting machine. Can be At this time, the return stud 195 engages with the return cam 103 and the movable member 1
90 is returned to the low position, and the yarn guide 15 is returned to the inoperative position.

For convenience of explanation, the above-described yarn switching device has been described to act on one movable finger and then sequentially act on one of the other movable fingers. Thereby, the plurality of thread guides can be selectively moved to the operation position and the non-operation position.

[0049]

According to the present invention, by combining a movable member provided with one additional stud and a selection stud with a selection device for freely selecting the selection stud and the additional stud, at least one or more studs can be obtained. Can be freely moved to an operation position and a non-operation position.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a circular knitting machine according to the present invention.

FIG. 2 is a longitudinal sectional view of the circular knitting machine.

FIG. 3 is a partially enlarged view of FIG. 2;

FIG. 4 is a side view for explaining engagement and disengagement of a yarn guide and a link member.

FIG. 5 is a partial perspective view of the circular knitting machine for explaining the operation of the yarn holding / cutting device.

FIG. 6 is a partially cutaway perspective view illustrating an engaged state of movable fingers of the selection device.

FIG. 7 is a side view of a movable member according to the present invention.

FIG. 8 is a plan view of the selection device.

FIG. 9 is a sectional view taken along the line IX-IX of FIG. 6;

FIG. 10 is a side view of a conventional movable member.

[Explanation of symbols]

 1. . . Cylinders, 13, 14, 15, 16. . . Thread guides, 13a, 14a, 15a, 16a. . . Link members, 170, 180, 190, 200. . . Movable members 172, 182, 192, 202. . . Control studs, 173, 183, 193, 203. . . Selected studs, 174, 184, 194, 204. . . Additional studs 175, 185, 195, 205. . . Return stud, 19. . . 20. Thread holding / cutting device, . . Movable blade, 21. . . Yarn catcher, 22. . . Fixed blade, 26. . . Claw, 28. . . Slider, 61. . . Cutter cam, 65. . . Trapper section 81. . . Two-arm lever, 84. . . Grooved block, 90. . . Selection device, 94. . . 97. Piezoelectric needle selection device . . U-shaped groove, 100. . . Recess, 101. . . Inclined section, 102. . . Forward cam, 103. . . Return cam, 104. . . Inclined part

Claims (2)

[Claims] 1. A plurality of yarn guides (13, 14, 15, 16) that selectively move between a non-operation position and an operation position, and a selection device (90) that program-controls the yarn guides. One end of the thread guide is connected to a two-arm lever (8
1) is connected to one of the arms (82).
Another arm (83) of the arm lever is connected to a movable member, and a lower end of the movable member is movable in a radial direction and a vertical direction in an annular guide portion of a U-shaped groove (97); The control studs (172, 182, 192, 202), the selection studs (173, 183, 193, 203) and the additional studs are provided on the part facing the inside of the knitting machine, and the part facing the outside of the knitting machine is provided. Are provided with return studs (175, 185, 195, 205). The U-shaped groove (97) has an inclined portion for pushing up the control studs (172, 182, 192, 202) of the movable member. A recess 100 having (101) is provided, and a return stud (175, 185, 19) of the movable member is provided.
A return cam (108) having an inclined portion (104) for pressing down the movable member is provided in the U-shaped groove (97) for pressing the movable member into the knitting machine. A cam (102) is provided and one or more movable fingers (94a, 94b, 94c, 94) selectively controlled by the selection device (90).
d), the movable fingers selectively acting on the selection studs (173, 183, 193, 203) of the movable member and individually corresponding to the thread guides (13, 14, 15, 16). Thread holding / cutting device (1) for holding and cutting yarn
9) The yarn feeder for knitting machines provided with 9), wherein the movable member (170, 180, 190, 200) has 1
Additional studs (174, 184, 194, 204)
And the movable finger of the selection device (90) for freely selecting this additional stud causes the additional stud to be at the same level as at least one of the movable fingers when the movable member moves to a higher position, or to be at the same level. By avoiding this, each yarn guide (13, 14,
15. The yarn feed switching device for a knitting machine, characterized in that it is possible to move (15, 16) to an operation position and a non-operation position. 2. The apparatus according to claim 1, wherein said selection device comprises a bimorph ceramic actuator.