CN109652914B

CN109652914B - Flat knitting machine

Info

Publication number: CN109652914B
Application number: CN201811106541.7A
Authority: CN
Inventors: 有北礼治; 羽山彻
Original assignee: Shima Seiki Mfg Ltd
Current assignee: Shima Seiki Mfg Ltd
Priority date: 2017-10-12
Filing date: 2018-09-21
Publication date: 2021-05-04
Anticipated expiration: 2038-09-21
Also published as: KR102030649B1; JP2019073813A; CN109652914A; JP6715225B2; KR20190041407A

Abstract

The invention provides a flat knitting machine, which can easily detach a needle selection drum. A weft knitting machine (1) is provided with a pair of front and rear needle selection drums (2F, 2B), and a pair of outer wall portions (3L, 3R) arranged on one end side and the other end side in the axial direction of the needle selection drums (2F, 2B). The weft knitting machine (1) is provided with: a pair of inner support wall parts (4L, 4R) for sandwiching the selector drums (2F, 2B) from both sides in the axial direction thereof; and drum support shafts (5F, 5B) that rotatably support the selector drums (2F, 2B) on the inner support wall portions (4L, 4R). The drum support shafts (5F, 5B) are configured to be freely inserted into and removed from the selector drums (2F, 2B).

Description

Flat knitting machine

Technical Field

The present invention relates to a weft knitting machine using a needle selection drum for selecting a knitting needle.

Background

As a flat knitting machine including at least a pair of front and rear needle beds, a flat knitting machine using a pair of needle selection drums for selecting needles arranged in a needle bed is known. For example, the weft knitting machine of patent document 1 is a weft knitting machine as follows: the knitting needles are selected by a plurality of needle selection pins extending in the axial direction of the needle selection drum and arranged in the circumferential direction. The weft knitting machine of patent document 2 is a weft knitting machine as follows: the knitting needles are selected by a plurality of triangular bottom plates extending in the circumferential direction of the selector drum and arranged in the axial direction.

Fig. 7 is a schematic three-dimensional view of the weft knitting machine 10 including the pair of

selector drums

20F and 20B (where (a) is a front view, and (B) is a plan view, and (C) is a side view). The flat knitting machine 10 is configured by providing a knitting unit 10U including needle beds and the like on a frame, not shown. The knitting unit 10U includes a pair of

outer wall portions

30L and 30R arranged to sandwich the

selector drums

20F and 20B in the axial direction of the

selector drums

20F and 20B, and a plurality of rails 70A and stays 90 arranged between the

outer wall portions

30L and 30R (the rails 70A are omitted in fig. 7B). A carriage, not shown, is attached to the rail 70A so as to be able to travel, and the

selector drums

20F and 20B indicated by two-dot chain lines are rotatably supported by the stay 90.

Needle beds

60F and 60B (see chain lines) having knitting needles are provided above the

selector drums

20F and 20B, and the knitted fabric can be knitted by traveling on the needle beds via a cam carriage. The

needle beds

60F and 60B have a length extending between the

outer walls

30L and 30R, and are fixed to the

outer walls

30L and 30R.

[ Prior Art document ]

[ patent document ]

[ patent document 1 ] Japanese patent application laid-open No. 2010-242244

[ patent document 2 ] Japanese patent application laid-open No. H10-77557

Disclosure of Invention

In the conventional flat knitting machine 10 having the alternative needle drum shown in fig. 7, a structure in which the

needle selection drums

20F and 20B are removed is not assumed. Therefore, when knitting a knitted fabric having a different shape from the knitted fabric that has been knitted so far, the transfer of the selector pins and the triangular base plate is performed while maintaining the state in which the

selector drums

20F and 20B are attached to the flat knitting machine 10. Since the

selector drums

20F and 20B are hardly exposed to the outside of the flat knitting machine 10, the transfer takes a lot of time and labor. On the other hand, when the

selector drums

20F and 20B are removed and the selector pins are transplanted or replaced with another selector drum, the

outer wall portions

30L and 30R must be detached from the rack by disconnecting the

outer wall portions

30L and 30R. That is, the knitting unit 10U must be disassembled, and this disassembling operation takes a lot of time and labor.

In view of the above problems, an object of the present invention is to provide a weft knitting machine in which a needle selection drum can be easily removed.

A weft knitting machine according to the present invention includes a pair of front and rear needle selector drums, and a pair of outer wall portions disposed on one end side and the other end side in an axial direction of the needle selector drum, and includes:

a pair of inner support wall portions that sandwich the selector drum from both sides in the axial direction of the selector drum between the pair of outer wall portions; and

a drum support shaft that rotatably and axially supports the selector drum to the inner support wall portion,

the drum support shaft is configured to be freely insertable into and removable from the selector drum.

As one aspect of the flat knitting machine of the present invention, there is provided:

the drum support shaft includes:

a movable support pin which is provided on one of the inner support wall portions so as to be insertable and removable, and supports the selector drum from one end side in an axial direction of the selector drum; and

and a fixed support pin fixedly secured to the other of the inner support wall portions, and supporting the selector drum from the other end side in the axial direction of the selector drum.

the selector drum includes a driven gear for rotating the selector drum at an end portion in an axial direction thereof.

the weft knitting machine comprises a pair of front and rear stays connecting a pair of the outer wall portions,

the inner support wall portion is fixed to the stay.

the weft knitting machine is provided with:

a plurality of pin grooves formed on the outer peripheral surface of the needle selecting drum for inserting needle selecting pins for selecting needles; and

and a relief groove provided on the outer peripheral surface, parallel to the pin groove, and having an opening width and a depth larger than those of the pin groove.

[ Effect of the invention ]

By providing the inner support wall portion, the selector drum can be detached without detaching the outer wall portion from the stand. Therefore, the needle selecting pin and the triangular bottom plate in the needle selecting drum can be easily replaced.

Further, by providing the inner support wall portion, the length of the needle bed can be made shorter than in the conventional art, and the short needle bed can be attached to the inner support wall portion without being attached to the outer wall portion. The weight of the weft knitting machine can be reduced by shortening the needle bed as compared with the conventional technique.

The drum support shaft supporting the selector drum is provided as a pair of left and right support pins, one support pin (movable support pin) is freely inserted, and the other support pin (fixed support pin) is fixed to the inner support wall portion, whereby the selector drum can be easily attached to and detached from the inner support wall portion.

By integrally providing the driven gear at the end of the selector drum, the man-hours for connecting the driven gear and the selector drum when the selector drum is attached can be reduced.

By attaching the inner support wall to the stay connecting the pair of outer wall portions, the outer wall portion, the inner support wall portion, and the selector drum can be handled as an integral body, and the productivity of the flat knitting machine can be improved.

By forming the retreat groove in the selector drum, the selector drum can be easily attached and detached. When the selector drum is attached and detached, the retreat groove of the selector drum and the position corresponding to the control jack of the knitting needle are aligned, so that even if the selector drum is slid in the axial direction thereof, the selector drum is less likely to interfere with the control jack, and the sliding of the selector drum is facilitated.

Drawings

Fig. 1 is a schematic front view of the weft knitting machine according to the embodiment.

Fig. 2 is a schematic plan view of the weft knitting machine according to the embodiment.

Fig. 3 is a schematic side view of the weft knitting machine according to the embodiment.

Fig. 4 is a schematic configuration diagram showing an engagement state of members related to needle selection of the weft knitting machine according to the embodiment.

Fig. 5 is a schematic configuration diagram showing an engagement state of the selector drum and the inner support wall portion of the weft knitting machine according to the embodiment.

Fig. 6 is a schematic configuration diagram showing an engagement state of the selector drum and the knitting needle according to the embodiment.

Fig. 7 is a schematic three-dimensional view of a conventional weft knitting machine, where (a) is a front view, (B) is a plan view, and (C) is a side view.

[ Mark Specification ]

Flat knitting machine 1

1U braiding unit

2F and 2B needle selection drum 2G driven gear

2hL, 2hR chimeric pore

20, 21 bearing part 22 needle selection pin 23 pin slot 24 retreat slot

3L, 3R outer wall part

4L, 4R inner support wall

5F, 5B drum supporting axle

50 Movable support pin 51 fixed support pin

6F, 6B needle bed

60 knitting needle 61 control jack 62 fastening part

7F, 7B carriage 7A rail

8F, 8B drive device (motor) 8G driving gear

9F, 9B stay

b1, b2, b3, b4 screw

R1 knitting needle forming region R2, R3 retreat region

10-bar knitting machine

10U braiding unit

20F, 20B needle selection drum

30L, 30R outer wall part

60F, 60B needle bed

70A rail

90 stay

100 stand

Detailed Description

< embodiment 1 >

Hereinafter, a glove knitting machine shown in fig. 1 to 6 will be described as an example of an embodiment of a flat knitting machine having a needle selection drum. The members to which "F", "B", "L", or "R" is attached at the end of the reference numerals in the drawings are members disposed on the "front side", "rear side", "left side", or "right side" of the flat knitting machine 1, respectively.

As shown in fig. 1 to 3, the flat knitting machine 1 of the present embodiment has a structure in which a knitting unit 1U is provided on a stand 100, as in the conventional flat knitting machine. The knitting unit 1U includes a pair of front and rear selector drums 2F, 2B, and a pair of

outer wall portions

3L, 3R arranged on one end side and the other end side in the axial direction of the selector drums 2F, 2B. The knitting unit 1U of the weft knitting machine 1 of this example further includes a pair of inner

support wall portions

4L, 4R sandwiching the selector drums 2F, 2B from both sides in the axial direction thereof between the pair of

outer wall portions

3L, 3R. The respective configurations of the weft knitting machine 1 will be described in detail below.

< outer wall portion >

The

outer wall portions

3L and 3R of this example are provided at the same positions as the

outer wall portions

30L and 30R of the conventional flat knitting machine 10 of fig. 7. That is, the

outer wall portions

3L and 3R are members constituting the left and right end portions of the knitting unit 1U of the weft knitting machine 1, and the left and right sizes of the weft knitting machine 1 are determined by the

outer wall portions

3L and 3R.

Outer wall portions

3L and 3R are also members for fixing knitting unit 1U to mount 100 (fig. 1 and 3). Inside the mount 100, a driving source such as

carriages

7F and 7B, a control unit for controlling knitting, a glove discharge port, and the like are provided.

Stays 9F and 9B are provided between the

outer wall portions

3L and 3R, and both are fixed by screws B1. The

stays

9F and 9B support the

outer wall portions

3L and 3R without being disassembled while maintaining the interval between the

outer wall portions

3L and 3R. Here, the stay 90 of the conventional flat knitting machine 10 shown in fig. 7 is also a member that connects the

outer wall portions

30L and 30R and supports the selector drums 20F and 20B. However, the

stays

9F and 9B in this example connect the

outer wall portions

3L and 3R, but do not support the

selector drums

2F and 2B.

< inner support wall portion >

The inner

support wall portions

4L and 4R provided in the weft knitting machine 1 are members which have not been provided, and are disposed between the

outer wall portions

3L and 3R as described above. The inner

support wall portions

4L and 4R are disposed so as to sandwich the

selector drums

2F and 2B from both sides in the axial direction thereof, and the

selector drums

2F and 2B are rotatably supported by the inner

support wall portions

4L and 4R via

drum support shafts

5F and 5B described later. Here, each selector drum 2F (2B) rotates relative to the drum support shaft 5F (5B), and the

drum support shafts

5F, 5B do not rotate relative to the inner

support wall portions

4L, 4R.

The inner

support wall portions

4L and 4R are attached to stays 9F and 9B connecting the

outer wall portions

3L and 3R, and are fixed by screws B2. According to this configuration, the knitting unit 1U can be formed in which the

outer wall portions

3L and 3R, the inner

support wall portions

4L and 4R, and the

stays

9F and 9B can be integrally handled. The flat knitting machine 1 can be efficiently manufactured by assembling the knitting unit 1U and providing the knitting unit 1U to the gantry 100, compared to the case where members such as the

outer wall portions

3L and 3R are sequentially assembled to the gantry 100.

In the weft knitting machine 1 including the inner

support wall portions

4L, 4R, as shown in fig. 4,

needle beds

6F, 6B in which a plurality of knitting needles are arranged are fixed to the inner

support wall portions

4L, 4R. The

needle beds

6F and 6B may have lengths corresponding to the

selector drums

2F and 2B. In this example, as shown by the chain line in fig. 1, the length of the needle bed 6F (6B as well) is substantially the same as the length between the outer end surface of the inner support wall 4L and the outer end surface of the inner support wall 4R, and does not reach the positions of the

outer walls

3R and 3L. Therefore, the

needle beds

6F and 6B of the flat knitting machine 1 of this example are shorter by 30% or more than the needle beds of the conventional flat knitting machine 10 (fig. 7). The flat knitting machine 1 of this example is lighter than the conventional flat knitting machine 10 because the

needle beds

6F, 6B are shorter than the conventional one. Since the

needle beds

6F, 6B are short and light, the

needle beds

6F, 6B can be easily handled in addition to cost reduction associated with material reduction of the

needle beds

6F, 6B, and therefore productivity of the flat knitting machine 1 can be improved.

On the other hand, as shown in fig. 4,

carriages

7F, 7B running on

needle beds

6F, 6B are slidably mounted on rails 7A erected between

outer wall portions

3L, 3R. The tracks 7A are provided in 2 on the needle bed 6F side and the needle bed 6B side, respectively, and in total 4, and the axis of the track 7A is parallel to the longitudinal direction of the

needle beds

6F and 6B. The

carriages

7F and 7B on the rail 7A are provided with cams for moving the selected knitting needles 60 (the knitting needles 60 on the needle bed 6B side are omitted in fig. 4) in the

needle beds

6F and 6B in the extending direction thereof. Therefore, the

carriages

7F and 7B must be able to reliably pass through the knitting needle forming region where the knitting needles 60 in the

needle beds

6F and 6B are arranged. Therefore, as shown in fig. 1, it is necessary to secure retreat regions R2 and R3 of the

carriages

7F and 7B (fig. 4) outside the knitting needle forming region R1. That is, the space between the inner support wall portion 4L (4R) and the outer wall portion 3L (3R) is by no means a useless space.

< Drum support shaft >

The

drum support shafts

5F, 5B are members that support the selector drums 2F, 2B with respect to the inner

support wall portions

4L, 4R. Since both the

drum support shafts

5F and 5B have the same configuration, the configuration of the drum support shaft 5F will be described with reference to fig. 5 in the following description.

The drum support shaft 5F of this example is constituted by a movable support pin 50 and a fixed support pin 51 which are separated from each other. The movable support pin 50 is provided on one inner support wall portion 4L so as to be insertable and removable, and supports the selector drum 2F from one end side in the axial direction of the selector drum 2F. A fitting hole 2hL into which the movable support pin 50 is inserted is provided on one end side of the selector drum 2F, a bearing portion 20 formed of a ball bearing or the like is provided on the inner periphery of the fitting hole 2hL, and the selector drum 2F is rotatable with respect to the movable support pin 50. As shown in fig. 3, the movable support pin 50 penetrates the outer wall portion 3L and is configured to be insertable into and removable from the outer wall portion 3L.

On the other hand, the fixed support pin 51 is fixedly secured to the other inner support wall portion 4R, and supports the selector drum 2F from the other end side in the axial direction of the selector drum 2F. A fitting hole 2hR into which the fixed support pin 51 is inserted is provided on the other end side of the selector drum 2F, a bearing portion 21 is provided on the inner periphery of the fitting hole 2hR, and the selector drum 2F is rotatable with respect to the fixed support pin 51. The axis of the movable support pin 50 coincides with the axis of the fixed support pin 51.

According to the above configuration, the selector drum 2F can be detached simply by loosening the screw b3 that fixes the movable support pin 50 to the inside support wall portion 4L, pulling out the tip end of the movable support pin 50 from the fitting hole 2hL of the selector drum 2F, sliding the selector drum 2F toward the inside support wall portion 4L, and pulling out the tip end of the fixed support pin 51 from the fitting hole 2 hR. In order to facilitate the sliding of the selector drum 2F at this time, it is preferable to form the retreat groove 24 (fig. 6) in the selector drum 2F. The detailed structure of the escape groove 24 will be described later.

Rotating mechanism of needle selecting drum

In the weft knitting machine 1 including the

selector drums

2F and 2B, as shown in fig. 4, the needle 60 to be selected is changed by rotating the selector drum 2F (2B). The turning mechanism for rotating the selector drum 2F (2B) in this example includes a driving device 8F (8B) such as a motor for generating a rotational force, a drive gear 8G for transmitting the rotational force, and a driven gear 2G. The drive gear 8G is fixed to the front end of the rotation shaft of the motor. On the other hand, the driven gear 2G is fixed to the selector drum 2F (2B) on the fixed support pin 51 side.

According to the above configuration, as shown in fig. 5, when the selector drum 2F is removed, the selector drum 2F is slid toward the inner side support wall portion 4L, whereby the driven gear 2G of the selector drum 2F and the drive gear 8G of the drive device 8F can be disengaged. Further, by fixing the driven gear 2G to the selector drum 2F by the screw b4, the man-hours of attaching and detaching the driven gear 2G to and from the selector drum 2F at the time of attaching and detaching the selector drum 2F can be eliminated.

< constitution for facilitating sliding attachment/detachment of needle selection drum >

In the weft knitting machine 1 of this example, as shown in fig. 6, a retreat groove 24 is provided on the outer peripheral surface of the selector drum 2F. The retreat groove 24 is a groove for avoiding contact between a member (a control jack 61 described later) that may interfere with the selector drum 2F and the selector drum 2F when the selector drum 2F is slidably attached and detached. The selector drum 2F is originally provided with a selector pin 22 for selecting a needle and a pin groove 23 into which the selector pin 22 is fitted. The needle selection pin 22 selects the knitting needle 60 by pushing up an engagement portion 62 provided to a control jack 61 of the knitting needle 60. Since the control jack 61 is biased in a direction approaching the selector drum 2F due to its own spring property, if the selector drum 2F is slid in the axial direction (depth direction of the paper surface in fig. 6), the engagement portion 62 may come into contact with the selector pin 22 and the pin groove 23, and the selector drum 2F may be difficult to slide. Therefore, in this example, the retraction groove 24 is provided on the outer circumferential surface of the selector drum 2F in order to facilitate the sliding movement of the selector drum 2F in the axial direction thereof.

The escape groove 24 is parallel to the pin groove 23, and has an opening width and a depth larger than those of the pin groove 23. More specifically, the retreat groove 24 is a linear groove extending from one end surface of the selector drum 2F to the other end surface. The opening width and depth of the retreat groove 24 are set so that the engagement portion 62 of the control jack 61 does not catch on the retreat groove 24 when the engagement portion 62 is positioned at the position of the retreat groove 24. That is, the escape groove 24 is sized to accommodate the engaging portion 62 therein.

< Effect >

According to the weft knitting machine 1 of the embodiment described above, the

needle selection drums

2F and 2B can be easily attached and detached by providing the inner

support wall portions

4L and 4R. Therefore, transfer of the needle selection pins 23 for knitting the knitted fabric and replacement of the

needle selection drums

2F and 2B can be easily performed, and the size and design of the knitted fabric (glove) can be easily changed.

Further, the weft knitting machine 1 of the embodiment is lighter and has better productivity than the conventional weft knitting machine because it includes the

needle beds

6F and 6B (fig. 1) shorter than the conventional one.

< other embodiments >

The

drum support shafts

5F, 5B of the weft knitting machine 1 are not limited to the configuration of embodiment 1. For example, the movable support pin 50 may be used as both the support pins supporting the

selector drums

2F and 2B on one end side and the other end side in the axial direction. Further, each drum support shaft 5F (5B) may be configured by a single shaft extending from one inner support wall portion 4L to the other inner support wall portion 4R.

The rotating mechanism of the

selector drums

2F and 2B of the weft knitting machine 1 is not limited to the configuration of embodiment 1. For example, a rotation mechanism using a timing belt or the like can be used. In this case, a timing belt is wound around a pulley provided at an end of the selector drum 2F (2B) and a rotary shaft of the motor to constitute a rotation mechanism.

In embodiment 1, the inner

support wall portions

4L and 4R are fixed to the stay 90, but may be fixed to the mount 100.

Claims

1. A weft knitting machine comprising a pair of front and rear needle selector drums and a pair of outer wall portions disposed on one end side and the other end side of the needle selector drums in an axial direction, the weft knitting machine comprising:

the drum support shaft is configured to be freely inserted into and removed from the selector drum, and includes a movable support pin and a fixed support pin that are separated from each other,

the movable support pin is provided on one of the inner support wall portions so as to be insertable and removable, the needle selection drum is supported from one end side in the axial direction of the needle selection drum, a first fitting hole into which the movable support pin is inserted is provided on one end side of the needle selection drum, a first bearing portion is provided on an inner periphery of the first fitting hole, the needle selection drum is rotatable with respect to the movable support pin, and the movable support pin is fixed to one of the inner support wall portions by a screw,

the fixed support pin is fixedly secured to the other inner support wall portion, the selector drum is supported from the other end side in the axial direction of the selector drum, a second fitting hole into which the fixed support pin is inserted is provided on the other end side of the selector drum, a second bearing portion is provided on the inner periphery of the second fitting hole, and the selector drum is rotatable with respect to the fixed support pin,

the axis of the movable support pin coincides with the axis of the fixed support pin,

the needle selection drum can be removed by loosening the screw, pulling out the tip of the movable support pin from the first fitting hole, sliding the needle selection drum toward one side of the inner support wall portion, and pulling out the tip of the fixed support pin from the second fitting hole.

2. The weft knitting machine according to claim 1,

3. The weft knitting machine according to claim 1 or 2,

the inner support wall portion is fixed to the stay.

4. The weft knitting machine according to claim 1 or 2,

the weft knitting machine is provided with: