JPH0261142A - Yarn feed body exchange unit in knitting machine - Google Patents

Abstract

PURPOSE:To provide the title unit so designed that the stay device of yarn feed bodies and carriages are fitted with holders of special structure respectively, thereby ensuring the yarn feed bodies to be delivered between the stay devices and carriages. CONSTITUTION:In a knitting machine to make a knitting in such a way that plural yarn feed bodies 14 with mutually different kinds of knitting yarns Y respectively inserted through stay devices formed out of the knitting domain of said machine are stayed and the yarn feed bodies 14 with the knitting yarns Y corresponding to the aimed knit texture inserted are transferred to carriages, said stay devices and carriages are fitted, respectively, with the following holders 40, 31: these holders are such that respective fixing members 31a, 41 and the corresponding movable holding pieces 34, 35 are fitted with attaching/ detaching ports 32, 43 to hold the yarn feed bodies 14 therewith along with fitting special springs 36, 47 between both said members and pieces.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a knitting yarn in which a plurality of yarn feeder bodies each holding a plurality of knitting yarns are separately held at required positions outside a knitting section of a knitting machine main body. The knitting machine is equipped with a restraining device, and the yarn feeder bodies are delivered to the carriage by sliding a carriage installed in the knitting machine body to the knitting yarn restraining device, and in particular, the yarn feeder body is Relating to a switching device.

[Conventional technology]

The knitting yarn restraining device in a conventional knitting machine is provided outside the knitting section of the knitting machine main body, and the device includes the devices shown in Fig. 8(a),
As shown in (b) and (C), the yarn feeder body 1
into a plurality of first holders 2 that each detachably hold the
A pair of attachment/detachment ports 5 spaced apart in the longitudinal direction of the yarn feeder body 1 and a pair of holding pieces 6 for holding the yarn feeder body 1 inserted into each attachment/detachment port 5 based on the biasing force of a spring 6a are provided. One second holder 4 provided separately on the carriage 3 has one removable lower and a yarn feeder body 1 inserted into the removable lower.
One holding piece 8 is provided that holds the holder 8 based on the biasing force of a spring (not shown).

When the yarn feeder body 1 on the second holder 4 of the carriage 3 is transferred to the empty first holder 2, as shown in FIG.
As shown in a), the holding piece 8 of the second holder 4 allows
With one yarn feeder body 1 held at its intermediate part,
When the holding piece 8 of the second holder 4 is inserted between the pair of holding pieces 6 from the attachment/detachment port 5 side of the first holder 2, both ends of the yarn feeder body 1 and the pair of holding pieces 6 of the first holder 2 After each holding piece 6 is retracted in the direction of expanding the attachment/detachment port 5 and the yarn feeder body 1 is inserted into each attachment/detachment port 5,
The holding piece 6 is moved in the direction of holding the yarn feeder body based on the biasing force of the spring 6a, and the yarn feeder body 1 is held on the first holder 2 by the holding piece 6.

Further, when the yarn feeder body 1 on one first holder 2 is received by the second holder 4, the second holder 4 is connected to the attachment/detachment opening 5 of the first holder 2, as shown in FIG. 8(b). approaches the first holder 2 from the opposite direction, and as a result of the engagement with the intermediate portion of the yarn feeder body 1, the holding piece 8 is retracted against the biasing force of the spring, and the attachment/detachment lower is expanded. The yarn feeder body 1 enters the attachment/detachment lower, and then the holding piece 8 is moved back in the yarn feeder body holding direction, so that the yarn feeder body 1 is held by the second holder 4.

However, in the above-mentioned knitting machine, the yarn feeding section of the tension device that applies tension to the knitting yarn fed out from the yarn supply source is located considerably above the yarn feeder body 1, and the knitted fabric is placed above the yarn feeder body 1. Since it is located at a height slightly below the lower end, the tension T2 is applied at a small angle to the horizontal plane at the lower end on the knitted fabric side, and at a large angle to the horizontal plane at the upper end on the yarn unwinding side. A tension force T1 acts on each of the yarn feeder members 1 on the carriage 3, and a rotational moment indicated by an arrow R in FIG. 8(b) acts on the yarn feeder body 1 on the carriage 3. Also, the second holder 4
Since only one holding piece 8 is provided, the yarn feeder body 1 is delivered with the rotational moment increasing, especially as the tension increases due to entanglement of the knitting yarn, etc. In this case, as shown in FIG. 8(c), the yarn feeder body 1 may be tilted due to the rotational moment and may be erroneously detached from the second holder 4. In that case, there was a problem in that the yarn feeder body 1 could not perform a normal transfer operation.

This invention was made in order to solve the above problem, and the purpose is that a large force is applied to each end of the yarn feeder body due to knitting yarn tension on the yarn supply source side and the knitted fabric side of the yarn feeder body. A yarn feeder body changing device for a knitting machine that can reliably maintain the holding state even when a large rotational moment is applied to the yarn feeder body and can transfer the yarn feeder body reliably and smoothly. Our goal is to provide the following.

[Means to solve the problem]

In order to achieve the above object, the present invention has a yarn feeder body formed in an elongated cylindrical shape, and the knitting yarn restraining device has a plurality of holes for detachably holding each of the yarn feeder bodies. In addition, the carriage is provided with a second holder that removably holds one of the yarn feeder bodies, and each of the first holders has a plurality of positions spaced apart in the longitudinal direction of the yarn feeder body. In each of the first holders, attachment/detachment openings for inserting and removing the yarn feeder bodies are formed so as to be aligned with each other,
The second holder has a plurality of attachment/detachment ports for inserting and removing the yarn feeder body, respectively, at a plurality of positions spaced apart in the longitudinal direction of the yarn feeder body and aligned with the attachment/detachment ports of the first holder. forming the first. A movable holding piece for holding the yarn feeder body inserted into the fitting/unloading port inside the fitting/unloading port is separately provided at the entrance portion of each fitting/unloading port of each second holder. A biasing means for biasing the holding piece in the yarn feeder body holding direction is provided, and the biasing force of the biasing means is applied to one end of the yarn feeder body and the other end based on the tension of the knitting yarn inserted through the yarn feeder body. It is set so that the answer that acts on the end part acts strongly on the holding piece that is involved in a portion near the midpoint where it is almost balanced, and acts weakly on the holding piece that is involved in a portion away from the midpoint. Based on the setting of the strength of the urging force of the urging means, when the yarn feeder body is delivered and replaced, the holding center of the yarn feeder body by the holding force of each holding piece of each of the first holders and the holding center of the yarn feeder body by the holding force of each holding piece of each of the first holders are The holding center of the yarn feeder body due to the holding force of each holding piece is made to substantially coincide or approach.

[Effect]

In this invention, the yarn feeder body is the first. When held in each of the second holders, the yarn feeder body is inserted into the plurality of attachment/detachment ports of each holder, and is held inside the attachment/detachment port by a holding piece provided at the entrance of each of the attachment/detachment ports; A biasing means is applied to a holding piece that is involved in a portion near the midpoint where the tension acting on one end and the other end of the yarn feeder body is almost balanced based on the tension of the knitting yarn inserted through the yarn feeder body. The biasing force of the biasing means acts strongly, and the biasing force of the biasing means is weak (acting) on the holding piece that is involved in the portion away from the intermediate point.Therefore, when the yarn feeder body is delivered and replaced, Even if a large rotational moment is generated, the yarn feeder body will not be accidentally detached from each holder.

When the yarn feeder body is delivered and exchanged, the positions of the attachment/detachment port of the first holder and the attachment/detachment port of each second holder are opposed to each other, and each The holding center of the yarn feeder body due to the holding force of each holding piece of the first holder and the holding center of the yarn feeder body due to the holding force of each holding piece of the second holder are substantially coincident or close to each other, and the yarn feeder body is held close to each other by the holding force of each holding piece of the second holder. The delivery will be carried out reliably and smoothly.

〔Example〕

Hereinafter, one embodiment embodying the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 4 to 7, a large number of knitting needles 12 are arranged in a row in the knitting section of the knitting machine main body 11 so as to be movable back and forth.
A carriage 13 is mounted on the machine body 11 so as to be slidable along the direction in which the knitting needles are arranged. On the other hand, a plurality of yarn feeder bodies 1
4 is formed into an elongated tube shape, and various knitting yarns Y are inserted into the hollow part.
are inserted respectively. A head 14 a is formed at the upper end of each yarn feeder body 14 , and a pair of flanges 14 b are formed at a predetermined interval in the middle part 9 . By sliding the carriage 13 back and forth within the knitting section with the carriage 13 attached to the knitting section, the knitting yarn Y is supplied to each knitting needle 12 via the yarn feeder 14, and the knitting needle 12 is moved back and forth to create the required stitches are formed.

A base 15 for replacing the yarn feeder is attached to the front part of the carriage 13 by a pair of attachment tools 16, and the base 15
A substantially semicircular recess 17 in which the head 14a of the yarn feeder body 14 can be locked is formed at the center of the front edge. base 15
A holding body 18 is connected to the front edge of the holding body 18 by a pair of links 19, 20 so as to be movable in parallel. And both links 19
．． 20, as shown in FIGS. 4 and 5, a part of the holding body 18 comes into contact with the base 15, and both 1
8.15, switching between the working position where the yarn feeder body 14 is prevented from being pulled out and the retracted position where it is separated from the base 15 and allows the yarn feeder body 14 to pass as shown in FIGS. 6 and 7. It will be done. Also, the spring 21 hung on the left link 19
As a result, the holding body 18 is urged toward the operating position.

A knitting yarn restraining device 22 is attached to the left side of the knitting machine main body 11 so as to be located outside the knitting section.

A guide plate 23 is provided on the upper surface of the knitting yarn restraining device 22 and is continuous with the upper surface of the knitting machine main body 11, and a guide rail 24 is provided at the front of the guide plate 23. A pair of inclined cam surfaces 24a and 24b are formed at both ends of the guide rail 24 and are inclined from rear to front in order to switch the clamping plate 18 between the operating position shown in FIG. 4 and the retracted position shown in FIG. , a clamping plate 1 is provided between both inclined cam surfaces 24a and 24b.
A holding surface 24c for holding 8 at the retracted position is formed.

On the other hand, an operating arm 25 is rotatably supported at its base end on the base 15 of the carriage 13, and a retaining pin 26 that can be engaged with and detached from the guide rail 24 is attached to the tip, and a left link 1
A protruding piece 27 that engages with 9 is provided, respectively. When the carriage 13 is located within the knitting section of the knitting machine main body 11, the engaging pin 26 of the operating arm 25 is separated from the guide rail 24, and the operating arm 25 is placed in the position shown in FIG. 18 is placed in the working position.

Also, when the carriage 13 is slid from the right side to the left side of the right side inclined cam surface 24a of the guide rail 24, and when it is slid from the left side to the right side of the left side inclined cam surface 24b, the operating arm 25 engagement pins 26 and each inclined cam surface 24a, 24
b, the operating arm 25 is rotated clockwise from the position shown in FIG. 4 to the position shown in FIG. 6, and the projection 27 of the operating arm 25 is engaged with the left link 19. The clamping body 18 is switched to the retracted position via.

As shown in FIGS. 4 to 7, the front part of the knitting yarn restraining device 22 has a plurality of (five in this example) grooves for individually restraining a plurality of knitting yarns Y together with the yarn feeder body 14. 1 holder 31 is provided in a protruding manner so as to be switchable between a non-working position P1 where the knitting yarn Y is not delivered and exchanged, and an action value ff1P2 where the knitting yarn Y is delivered and exchanged. As shown in FIG.
A pair of attachment/detachment ports 32 and 33 for inserting and removing the yarn feeder body 14 at two positions spaced apart in the longitudinal direction of the yarn feeder body 14 are formed in the main body 31a of the first holder 31 so as to be aligned with each other. has been done.

As shown in FIGS. 1 and 2 (a) and (b), in the artificial part of each attachment/detachment port 32.33, the main body 31a has a yarn feeder body 1 inserted into each attachment/detachment port 32.33.
4 inside the attachment/detachment opening 32.33, a holding piece 34.35 formed in a substantially U-shape in plan is pivotably supported at its approximate middle portion, and the tip portions 34a, 35a are arranged at the artificial parts of each attachment/detachment port 32 and 33. Restricting parts 34b and 35b for regulating the swinging range of the holding pieces 34 and 35 are protruded near the shaft support of each holding piece 34 and 35, and each holding piece 34 and the main body 31a are Piece 34
．． Coil springs 36 and 37 are interposed as biasing means for biasing the yarn feeder 35 in the yarn feeder holding direction.

Incidentally, the tip portions 34a, 35a have slopes 5 facing outward.
1 and the attachment/detachment openings 32 and 33 are formed, and the slope 52 is steeper than the slope 51. Therefore, a larger drag force is generated when the yarn feeder body 14 is removed from the attachment/detachment port 32.33 than when it is inserted into the attachment/detachment port 32.33.
Once the yarn feeder body 14 is inserted into the attachment/detachment opening 32, 33, it can be held securely.

The biasing force of each coil spring 36, 37 is based on the tension of the knitting yarn Y inserted through the yarn feeder body 14, and is applied to one end and the other end of the yarn feeder body 14 at a portion near the midpoint C where the forces are almost balanced. The lower holding piece 35 acts strongly against the upper holding piece 34 that is involved in the process, and is involved in a part away from the intermediate point C.
It is set to work weakly against Also, based on the setting of the strength of the biasing force of each of the springs 36 and 37, the holding center H1 of the yarn feeder body 14 in each first holder 31 is a midpoint C of the yarn feeder body 14 in the second holder described later. is set near .

On the other hand, a pair of upper and lower main bodies 41.42 constituting the second holder 40 are attached to the support plate portion 38.39 integrally formed with the right link 20, and each holding piece 34 of each of the first holders 31 They are arranged vertically apart from each other with respect to .35. Each main body 41, 42 is formed with attachment/detachment openings 43, 44 for the yarn feeder body 14, and an L-shaped holding piece 45, 46 is swingably supported at its base end, and its tip The parts 45a, 46a are arranged at the artificial part of the attachment/detachment opening 43.44.

Incidentally, the tip portions 45a, 46a have slopes 5 facing outward.
3 and the attachment/detachment ports 43 and 44 are formed, and the slope 54 is steeper than the slope 53. Therefore, a larger drag force is generated when the yarn feeder body 14 is removed from the attachment/detachment port 43.44 than when it is inserted into the attachment/detachment port 43.44.
Once the yarn feeder body 14 is inserted into the attachment/detachment opening 43, 44, it can be held securely.

Coil springs 47, 48 are interposed between each of the holding pieces 45, 46 and the main body 41, 42 as biasing means for urging each of the holding pieces 45, 46 in the yarn feeder holding direction. The biasing force of each coil spring 47, 48 is based on the tension of the knitting yarn Y inserted through the yarn feeder body 14, and is applied to one end and the other end of the yarn feeder body 14 at a portion near the midpoint C where the forces are almost balanced. It is set to act strongly against the lower holding piece 46 involved in the area, and weakly act against the upper holding piece 45 involved in the area away from the intermediate point C. Moreover, each spring 47
．． Based on the strength setting of the biasing force of 48, the second holder 40
A holding center H2 of the yarn feeder body 14 in is set near a midpoint C of the yarn feeder body 14 in the first boulder 31.

When the yarn feeder body 14 is transferred between each of the first holders 31 and the second holder 40, the holding centers H1 and H2 of both holders 31 and 40 are arranged at substantially coincident positions, and the yarn feeder body Due to the engagement of the holding pieces 34.35 (45, 46) in the holder on the side that receives the yarn feeder 14 with the yarn feeder body 14, each holding piece 34.35 resists the biasing force of the spring 36.37 (47, 48). (45, 46) are retracted and swung in the direction of releasing the yarn feeder body, and then, when the yarn feeder body 14 is inserted into the attachment/detachment port 32.33 (43, 44), the holding piece 34.35 (45, 46) is spring 36.3
7 (47, 48), the holding pieces 34, 35 (45, 46) are swung back in the direction of holding the yarn feeder body.
), the yarn feeder body 14 is connected to the attachment/detachment port 32.33 (43,4
4) is held inside.

Next, the operation of the knitting machine configured as described above will be explained.

Now, in Figures 4 and 5, the carriage 13 is the knitting machine main body 11.
It shows the state where it is placed at the left end position of the knitting section in . At this time, since the engagement pin 26 of the actuating arm 25 is separated from the guide rail 24, the clamping body 18 is placed in the operating position via each link 19, 20 by the biasing force of the spring 21, and the clamping body The head 14a of the yarn feeder body 14 is locked between the yarn feeder body 18 and the base 15, and the upper part of the yarn feeder body 14 is held by each holding piece 45, 46 of the second holder 40.

In addition, in the knitting yarn restraining device 22, one first holder 31 in an empty state from which the yarn feeder body 14 has been removed is placed at the operating position P2, and the remaining first holders 31 holding the yarn feeder bodies 14 are in an idle state. It is located at the working position zp1. Furthermore, knitting yarn Y is pushed through each yarn feeder body 14 from a yarn supply source to a knitted fabric via an upper tension device.

In the above state, the carriage 13 is slid to the left, and as the carriage 13 slides, the engagement pin 26 of the actuation arm 25 is moved forward along the right inclined cam surface 24a of the guide rail 24, causing the operation to take place. When the arm 25 is rotated clockwise in FIG. 4, each link 19,20 is rotated clockwise in FIG. Rotated. Then, the clamping body 18 is moved in parallel via both links 19.20 from the clamping position shown in FIGS. 4 and 5 to the retracted position shown in FIGS. 6 and 7, and a passage is created between the two links 18.15. At the same time, the yarn feeder body 14 on the right link 20 is disengaged forward from the recess 17 of the base 15 and placed in the passage.

As the carriage 13 continues to slide to the left, the engagement pin 26 is engaged with the holding surface 24c of the guide rail 24, and while this engagement is maintained, the clamping body 18 is held at the retracted position. Ru. During this time, the operation of transferring and exchanging the yarn feeder body 14 is performed. That is, the second holder 40
When the upper yarn feeder body 14 approaches the first holder 31 at the working position P2, as is clear from FIG. 35, and the holding centers H1 and H2 of both holders 31 and 40 are approximately the same.
One defeat on the plane.

As is clear from FIGS. 2(a) and 2(b), each holding piece 34.35 of the first holder 31 resists the biasing force of each spring 36.37 due to the engagement with the yarn feeder body 14. When the yarn feeder body 14 enters the inside of each attachment/detachment port 32.33, each holding piece 34.
35 is swung back to the yarn supplying body holding direction, and the holding piece 3
4.35, the yarn feeder body 14 is held within the attachment/detachment opening 32.33. After that, each holding piece 45 of the second holder 40
．． 46 is detached to the left (to the right in FIG. 1) as the carriage 13 slides leftward, and the delivery of the yarn feeder body 14 is completed.

Then, when the carriage 13 passes through the first holder group,
The first holder 31 that has received the yarn feeder body 14 is moved from the working position P2 to the non-working position P1, and holds the yarn feeder body 14 to be used next based on a predetermined knitting yarn selection order. The first holder 31 is in the inactive position P.
1 to the active position P2. after that,
The sliding direction of the carriage 13 is reversed and it is slid from the outside of the first holder group to the right, and the second holder 40 is moved from the outside of the first holder group to the right.
When approaching the holder 31, the holding centers H1 and H2 of each holder 31 and 40 are approximately aligned, and the yarn feeder body 1 is
In substantially the same way as when transferring from the second holder 40 to the first holder 31 in No. 4, each holding piece 45.46 is attached to each spring 47.4.
It is reciprocated based on the action of 8. As a result, the new yarn feeder body 14 is transferred from the first holder 31 to the second holder 4.
Passed to 0.

As the carriage 13 continues to slide to the right, the engagement pin 26 of the operating arm 25 separates from the holding surface 24c of the guide rail 24, and by the action of the right inclined cam surface 24a,
The operating arm 25 is rotated back counterclockwise in FIG.
Accordingly, the yarn feeder body 14 on the right link 20 enters the recess 17 of the base 15, and the clamping body 18 is moved to the clamping position, and the yarn feeder weight 4 is
The head 14a of is locked. Thereby, the delivery of the new yarn feeder body 14 is completed. Thereafter, by sliding the carriage 13 within the knitting section, stitches can be formed using the knitting yarn Y passing through the new yarn feeder body 14.

As mentioned above, in this example each holder 31.40
Since movable holding pieces 34, 35, 45, and 46 are provided to hold the yarn feeder body 14 at two positions spaced apart in the longitudinal direction of the yarn feeder body 14, the tension of the knitting yarn Y causes the yarn feeder body 14 to Large tension TI at the upper and lower ends
, T2, and a large rotational moment in the direction indicated by arrow R in FIG. 1 acts on the yarn feeder body 14, the retained state can be reliably maintained.

In addition, in each holder 31, 40, the tension applied to one end and the other end of the yarn feeder body 14 based on the tension of the knitting yarn inserted through the yarn feeder body 14 is approximately balanced at a portion near the midpoint C. Coil spring 3 for the retaining piece 34° 46 involved
A biasing force of 6.48 is applied to the coil spring 37.47 for the holding piece 35.45 that is involved in the part away from the intermediate point C.
(by setting the biasing force of each spring, and by setting the biasing force of each spring, the yarn feeder
The holding centers H1 and H2 of the yarn feeder body 14 are made to substantially coincide with each other when the yarn feeder body 14 is delivered and replaced. Therefore, even in a situation where the rotational moment 2 is generated in the yarn feeder body 14 during transfer and exchange, it is possible to prevent the posture of the yarn feeder body 14 from being disturbed, and to prevent the yarn feeder body 14 from falling from each holder 31, 40. It can be delivered without any hassle.

Note that this invention is not limited to the above embodiments,
It is also possible to increase the number of holding pieces on each holder, or to change the arrangement of the holding pieces on both holders when transferring the yarn feeder.

〔Effect of the invention〕

As described in detail above, the present invention is capable of rotating even when a large rotational moment is applied to the yarn feeder body due to the force acting on the yarn supply source side end and the knitted fabric side end of the yarn feeder body based on the tension of the knitting yarn. The holding state can be maintained reliably, and the yarn feeder body can be delivered reliably and smoothly, which is an excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a rear view of the main parts of a yarn feeder rod exchange device according to an embodiment of the present invention, showing a state in which the yarn feeder rod is transferred, and FIGS. FIG. 3 is a plan view showing the yarn feeding body inserted into the second holder; FIG. 4 is a plan view showing part of the ti during knitting; FIG. 5 is a side view; Figure 6 is a plan view of the knitting machine immediately before the delivery of the yarn feeder, Figure 7 is a partial side view, and Figures 8 (a) and (b).
) and (c) are rear views respectively showing the delivery state of the yarn feeder body in the conventional device. 11...knitting machine body, 13...carriage, 14...
Yarn feeder body, 22...Knitting yarn restraining device, 31.40...
1st degree second holder, 32, 33. 43. 44... attachment/detachment port, 34□ 35, 45. 46... holding piece, 36.
37°47.48...Coil spring as biasing means,
Y: Knitting yarn, Hl, H2: Holding center, C: Midpoint of yarn feeder.

Claims (1)

[Scope of Claims] 1 A plurality of yarn feeder bodies (1
4) is provided with a knitting yarn restraining device (22) for separately restraining the knitting yarn restraining devices (22), and by sliding a carriage (13) installed on the knitting machine main body (11) to the knitting yarn restraining device (22). In a knitting machine in which each yarn feeder body (14) is transferred to a carriage (13), the yarn feeder body (14) is formed into an elongated cylindrical shape, and the knitting yarn restraining device (22) is provided with each of the yarn feeder bodies (14). A plurality of first holders (31) for detachably holding each yarn feeder body (14)
In addition, the carriage (13) is provided with a second holder (40) for removably holding each of the yarn feeder bodies (14), and each of the first holders (31) is provided with a yarn feeder, respectively. Body (1
4) attachment/detachment ports (32, 33) for inserting and removing the yarn feeder (14) at a plurality of positions spaced apart in the longitudinal direction are formed so as to be aligned with each other in each first holder; ) has a yarn feeder body (1
4) A plurality of attachment/detachment ports for inserting and removing the yarn feeder body (14) at a plurality of positions spaced apart in the longitudinal direction and at positions inconsistent with the respective attachment/detachment ports (32, 33) of the first holder (31); (43, 44), each attachment/detachment opening (
32, 33, 43, 44), insert the yarn feeder body (14) inserted into the attachment/detachment port (32, 33, 43, 44) into the inside of the attachment/detachment port (32, 33, 43, 44). A movable holding piece (34, 35, 45, 46) is separately provided to hold each holding piece (34, 35, 45, 46).
urging means (36, 37, 4) for urging the holding pieces (34, 35, 45, 46) in the direction of holding the yarn feeder
7, 48), and the urging means (36, 37) are provided.
, 47, 48) are applied to the intermediate point where the forces acting on one end and the other end of the yarn feeder body (14) are almost balanced based on the tension of the knitting yarn inserted through the yarn feeder body (14). It acts strongly on the holding pieces (34, 46) that are involved in the part close to (C), and acts weakly on the holding pieces (35, 45) that are involved in the part away from the intermediate point (C). Based on the setting of the strength of the biasing force of the biasing means (36, 37, 47, 48), each of the first holders (31) is Holding piece (
The holding center (H1) of the yarn feeder body (14) due to the holding force of the yarn feeder (14) and each holding piece (H1) of the second holder (40)
A yarn feeder body changing device for a knitting machine, characterized in that the holding center (H2) of the yarn feeder body (14) is substantially coincident or close to each other due to the holding force of (45, 46).