CN109208168B

CN109208168B - Composite needle

Info

Publication number: CN109208168B
Application number: CN201810735634.XA
Authority: CN
Inventors: 北原健治
Original assignee: Shima Seiki Mfg Ltd
Current assignee: Shima Seiki Mfg Ltd
Priority date: 2017-07-07
Filing date: 2018-07-06
Publication date: 2020-08-25
Anticipated expiration: 2038-07-06
Also published as: EP3425097B1; KR102069232B1; EP3425097A2; JP2019015001A; EP3425097A3; CN109208168A; JP6692325B2; KR20190005769A

Abstract

The invention provides a compound needle which has enough strength and is not easy to retain garbage in a slider groove. A composite needle (1) is provided with: a needle body (2) having a needle hook (20) provided at a front end and a slider groove (21) provided at an upper end surface; and a slider (3) which is slidably fitted into the slider groove (21) and opens and closes the hook (20), wherein the compound needle (1) is provided with a waste discharge window (4), the waste discharge window (4) communicates with a portion of the slider groove (21) on the rear end side in the sliding direction of the slider (3), an opening is formed in the side surface of the needle body (2), and the waste discharge window (4) has a shape which accommodates the rear end of the portion of the slider (3) which is in sliding contact with the bottom (21b) of the slider groove (21) when the slider (3) is retreated to the rearmost in the sliding direction.

Description

Composite needle

Technical Field

The present invention relates to a compound needle including a needle body and a slider.

Background

As a knitting needle used in a flat knitting machine, a compound needle in which a needle body having a hook and a slider for opening and closing the hook are combined so as to be movable relative to each other is known (for example, patent document 1). In this compound needle, the slider is slidably fitted into a slider groove formed in the needle body.

In the compound needle, dust, yarn dust, and the like generated when knitting a knitted fabric on a flat knitting machine are easily accumulated in a slider groove. If the refuse is retained in the slider groove, the slider is prevented from sliding, and the hook may not be fully opened or the formation of the loop may become unstable. In view of such a problem, patent document 1 discloses a structure in which a hole (cleaning portion) is formed in a range of at least half the length of the bottom portion of the slider groove, and dust is discharged from the slider groove.

[ Prior Art document ]

[ patent document ]

[ patent document 1 ] Japanese patent No. 5618778

In patent document 1, since a large hole is formed in a range of at least half the length of the bottom portion of the slider groove, the strength of the needle body in the thickness direction is low. In particular, in a fine-pitch flat knitting machine, the thickness of the composite needle may be 1mm or less, and the strength of the composite needle of patent document 1 may be insufficient.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object thereof is to provide a compound needle having sufficient strength and in which waste is less likely to remain in a slider groove.

The composite needle of the present invention comprises:

the needle body is provided with a needle hook arranged at the front end and a slider groove arranged on the upper end surface; and

a slider slidably fitted into the slider groove to open and close the hook,

the compound needle has a waste discharge window which communicates with a portion of the slider at the rear end side in the sliding direction in the slider groove and which forms an opening in the side surface of the needle body,

the trash discharge window has a shape that accommodates a rear end of a portion of the slider that is in sliding contact with a bottom portion of the slider groove when the slider is retracted to the rearmost position in the sliding direction.

As an embodiment of the compound needle of the present invention, the following embodiments can be mentioned:

at least a part of the dust discharge window is formed in a solid portion located on a rear end side in the sliding direction with respect to the slider groove,

the slider has an engaging portion that engages with an upper edge surface and a lower edge surface of a portion of the garbage disposal window provided in the solid portion, and the leading end of the slider is prevented from floating from the slider groove.

the compound needle includes a waste discharge hole formed at a position in the middle of the bottom in the extending direction of the slider groove, and an opening is formed in the lower surface of the needle body,

an opening length of the trash discharge hole in the sliding direction is greater than or equal to 1/30 and less than or equal to 1/5 of a length of the bottom of the slider groove in the sliding direction.

[ invention ] A fruit extract

The composite needle of the present invention has sufficient strength for a flat knitting machine used for fine pitches. This is because the trash discharge window is provided to be connected to a very small portion of the rear end portion of the slider groove. Further, according to the compound needle of the present invention, the reciprocating movement of the slider facilitates the pushing of the refuse from the slider groove to the refuse discharge window, and the refuse does not remain between the slider and the slider groove on the rear side in the longitudinal direction of the compound needle. The reason why the garbage is easily pushed out from the garbage discharging window is that the garbage discharging window has a shape that accommodates the rear end of the portion of the slider that is in sliding contact with the bottom of the slider groove when the slider is retracted to the rearmost position. If the refuse discharge window has such a shape, even if the slider is retreated to the rearmost side, there is room for discharging refuse between the refuse discharge window and the rear end of the slider, and refuse can be easily discharged from the refuse discharge window. Therefore, according to the composite needle of the present invention, the following disadvantages can be suppressed: garbage is retained between the slider and the slider groove in the height direction of the compound needle, so that the slider floats from the slider groove; or, since the garbage is accumulated between the slider and the slider groove on the rear side in the longitudinal direction (sliding direction) of the compound needle, the slider cannot be completely retracted.

The engaging portion of the slider physically abuts against the upper edge surface and the lower edge surface of the trash discharge window, so that the slider can be prevented from floating from the slider groove. As a result, the front end portion of the slider can be prevented from protruding above the slider groove and hindering the knitting operation.

Since the waste discharge hole having a predetermined length or less is formed in the middle portion of the slider groove, waste is less likely to remain in the portion on the tip side of the slider groove. As a result, it is difficult for garbage to be retained between the bottom of the slider groove and the lower end surface of the slider, and the leading end portion of the slider is not easily projected above the slider groove.

Drawings

Fig. 1 is a partial configuration diagram of a compound needle according to embodiment 1, where (a) is an exploded view of a needle body and a slider, (B) is a diagram showing a state where a hook of the needle body is closed, and (C) is a diagram showing a state where the hook of the needle body is open.

In FIG. 2, (I) is a sectional view from I to I of FIG. 1(C), and (II) is a sectional view from II to II of FIG. 1 (C).

Fig. 3 is a partial configuration diagram of a compound needle according to embodiment 2, where (a) is an exploded view of a needle body and a slider, (B) is a diagram showing a state where a hook of the needle body is closed, and (C) is a diagram showing a state where the hook of the needle body is open.

In FIG. 4, (I) is a sectional view I-I of FIG. 3(C), (II) is a sectional view II-II of FIG. 3(C), and (III) is a sectional view III-III of FIG. 3 (C).

[ Mark Specification ]

1 composite needle

2 needle body

20-needle hook

Wall 21w of back end surface 21s of bottom 21s of 21 slider groove 21b

29 concave engaging portion

3 guide pin

30 slider body

31 tab 31t latch 31p engagement portion

39 convex engaging part

4 refuse discharging window

40 upper edge surface 41 lower edge surface 4f upper edge front part 4b upper edge rear part

5 refuse discharge hole

Detailed Description

< embodiment 1>

A composite needle 1 according to embodiment 1 will be described with reference to fig. 1 and 2. The upper and lower sides of the drawing sheet of fig. 1 are the front and rear sides of the compound needle 1, the right and left sides of the drawing sheet are the lower and upper sides of the compound needle 1, and the direction perpendicular to the drawing sheet is the thickness direction of the compound needle 1. In fig. 2 which is a cross-sectional view of fig. 1(C), the direction perpendicular to the paper surface outward and the direction perpendicular to the paper surface inward are respectively the front and rear of the compound needle 1, the right and left of the paper surface are respectively the lower and upper sides of the compound needle 1, and the vertical direction of the paper surface is the thickness direction of the compound needle 1.

As shown in fig. 1(a), the compound needle 1 includes: a needle body 2 having a needle hook 20; and a slider 3 assembled to the needle body 2 so as to be slidable with respect to the needle body 2. The slider 3 included in the compound needle 1 of this example includes two tabs 31 arranged in parallel at the tip of the slider 3. The compound needle 1 may be a compound needle having no fin at the tip of the slider (see, for example, japanese patent publication No. 4-66941). The compound needle 1 of the present example can be used in a two-bed flat knitting machine, and can also be used in a four-bed flat knitting machine. Next, each structure of the compound needle 1 of the present example will be described in detail.

< needle body >

The needle body 2 is provided with a slider groove 21 on the upper surface of the tip side thereof. The later-described vanes 31 of the slider 3 are slidably fitted into the slider grooves 21 (see fig. 1(B) and (C) and fig. 2(I) and (II)). The slider groove 21 can be formed by cutting the upper surface of the needle body 2 with a cutter.

The slider groove 21 is a space surrounded by a pair of wall portions 21w (see fig. 2(I)), a bottom portion 21b connecting the lower portions of the wall portions 21w, and a rear end surface 21s which is a wall surface on the rear side in the longitudinal direction of the needle body 2. Here, the bottom 21B of the slider groove 21 is a portion in which the lower end surface of the slider 3 (in this example, the lower end surface of the tab 31) is in sliding contact when the slider 3 in the slider groove 21 slides within the range from fig. 1(B) to fig. 1 (C). That is, in the outline of the slider groove 21 shown by the broken line in fig. 1(a), the portion of the length L shown by the dimension line is the bottom portion 21b, and the portion of the needle body 2 on the rear side of the dust discharge window 4 described later is the portion which does not come into sliding contact with the lower end surface of the fin 31, and therefore is the rear end surface 21s of the slider groove 21.

The needle main body 2 of this example includes a dust discharge window 4 that communicates with a portion on the rear end side of the bottom portion 21b of the slider groove 21 and that is open on the side surface of the needle main body 2. The dust discharge window 4 of this embodiment is a through hole that penetrates the needle body 2 in the thickness direction (see fig. 2 (II)). The dust discharge window 4 of this example is a substantially elliptical hole inclined along the inclination near the rear end of the bottom portion 21b, and can be formed by punching the needle body 2 in the thickness direction. As shown in fig. 1(C), the trash discharge window 4 has a shape that accommodates the rear end of the portion of the slider 3 that is in sliding contact with the bottom portion 21b of the slider groove 21 when the slider 3 is retreated to the rearmost side in the sliding direction. The dust discharge window 4 is formed to extend across a hollow portion where the slider groove 21 is formed and a solid portion where the slider groove 21 is not formed when the needle body 2 is viewed from the side. Therefore, the slider groove 21 is not crushed when the needle body 2 is punched. Of course, the slider groove 21 may be formed in the needle body 2 by a cutter after the dust discharge window 4 is formed in the needle body 2 by punching. In terms of ease of forming the dust discharge window 4 and strength of the needle body 2, it is preferable that the region of the dust discharge window 4 overlapping the solid portion is larger than the region overlapping the hollow portion.

Here, the dust discharge window 4 may be connected to the rear end of the bottom 21b, and the dust discharge window 4 may be formed only in the hollow portion of the needle body 2 or only in the solid portion. In the former case, the debris discharge window 4 is formed so as to penetrate one or both of a pair of wall portions 21w (fig. 2(II)) of the slider groove 21 so that the rear edge portion of the debris discharge window 4 is connected to the bottom portion 21b and the rear end surface 21s of the slider groove 21 in the same plane. In the latter case, the dust discharge window 4 is formed in the solid portion of the needle main body 2 so that the front edge portion of the dust discharge window 4 is connected to the bottom portion 21b and the rear end surface 21s of the slider groove 21 in the same plane.

A waste discharge hole 5 opened in the lower surface of the needle body 2 is formed at a position in the middle of the bottom 21b of the slider groove 21 in the extending direction of the slider groove 21. As shown in fig. 2(I), at the position of the waste discharge hole 5, the slider groove 21 is formed by a pair of

wall portions

21w, 21w arranged in parallel, and has no bottom portion.

As shown in fig. 1 a, the size of the waste discharge hole 5 (the opening length of the slider 3 in the sliding direction in the extending direction) is equal to or greater than 1/30 and equal to or less than 1/5 of the length L (see the dimension line) of the bottom 21b, and the portion constituted only by the

wall portions

21w and 21w (see fig. 2I) is extremely short compared with the entire length of the slider groove 21. Therefore, the strength of the composite needle 1 is not significantly reduced by the dust discharge hole 5. The size of the garbage discharge hole 5 in this example is about 1/16 times the length of the bottom 21 b.

< slider >

The slider 3 is a member that slides along the advancing and retreating direction of the compound needle 1 (the vertical direction of the paper). The slider 3 includes a slider body 30 and two tabs 31 attached to the tip of the slider body 30 (see also fig. 2). A latch (tongue)31t for catching the stitch when the stitch is transferred is formed at the tip of the tab 31.

In the state shown in fig. 1(B) and (C), the two flaps 31 are in close contact with each other in the thickness direction (direction perpendicular to the paper surface) of the compound needle 1. When transferring the stitch, the two flaps 31 move upward in the paper surface from the state shown in fig. 1B, and are separated in the left-right direction (direction perpendicular to the paper surface) with the hook 20 interposed therebetween.

< opening and closing operation of hook >

As shown in fig. 1(B), when the slider 3 advances relative to the needle body 2, the tip end portion of the hook 20 is sandwiched between the two fins 31, and the hook 20 of the needle body 2 is closed. On the other hand, when the slider 3 retreats from the needle body 2 in the state of fig. 1(B), the lower end surface of the fin 31 slides in contact with the bottom 21B of the slider groove 21, and the fin 31 also retreats in the slider groove 21. When the slider 3 retreats to the rearmost side, the needle body 2 and the slider 3 become the positional relationship shown in fig. 1 (C). In the compound needle 1 of this example, the retreating limit position of the slider 3 is defined by the engagement of the concave engagement portion 29 formed in the needle main body 2 and the convex engagement portion 39 formed in the slider 3.

When the slider 3 retreats, the dust sandwiched between the lower end surface of the fin 31 and the bottom 21b is pushed out from the bottom 21b by the fin 31, guided to the dust discharge hole 5, and discharged to the outside of the needle body 2. Therefore, the dust is less likely to be accumulated in the portion of the slider groove 21 on the tip side of the dust discharge hole 5, and the problem that the dust is accumulated in the portion and the tongue 31t of the slider 3 protrudes above the slider groove 21 can be suppressed. If the tongue 31t protrudes above the slider groove 21, the knitting operation may be hindered by the stitch being caught by the tongue 31t protruding from the slider groove 21 during knitting.

The refuse that is not completely discharged through the refuse discharge hole 5 and the refuse that is accumulated in the rear portion of the refuse discharge hole 5 in the slider groove 21 are pushed out from the bottom portion 21b by the fin 31, guided to the refuse discharge window 4, and discharged to the outside of the needle body 2. The rear end of the portion of the fin 31 disposed inside the slider groove 21 is formed in a rounded shape, and when the slider 3 is retracted to the rearmost position, a part of the rounded rear end of the fin 31 protrudes to the dust discharge window 4. Further, the portion near the rear end of the bottom 21b of the slider groove 21 is formed in a shape corresponding to the rounded shape of the fin 31, whereby the garbage can be easily pushed out from the bottom 21 b. Therefore, the following disadvantages can be suppressed: garbage is retained between the slider 3 and the slider groove 21 in the height direction of the compound needle 1, and the slider 3 is floated from the slider groove 21; alternatively, a space between the slider 3 and the slider groove 21 on the rear side in the longitudinal direction of the compound needle 1 is filled with dust, and the slider 3 cannot be completely retracted.

< embodiment 2>

In embodiment 2, a composite needle 1 having a structure different from that of embodiment 1 will be described with reference to fig. 3 and 4. The observation method of fig. 3 and 4 is the same as that of fig. 1 and 2 of embodiment 1, and in fig. 3 and 4, the same reference numerals as in embodiment 1 are given to members having the same functions as in embodiment 1. Next, the present embodiment will be described mainly with respect to differences from embodiment 1.

The main point of difference between the needle main body 2 of this example and the needle main body 2 of embodiment 1 is the shape of the dust discharge window 4 provided in the needle main body 2. A part of the dust discharge window 4 of this example is formed as a solid portion on the rear end side in the sliding direction with respect to the slider groove 21. An upper edge surface 40 and a lower edge surface 41 are formed at a portion of the dust discharge window 4 provided at the solid portion. The dust discharge window 4 is formed in an approximately scalene triangle having a lower edge surface 41 substantially parallel to the extending direction of the needle body 2. The upper edge surface 40 of the dust discharge window 4 is constituted by an upper edge front portion 4f which descends toward the lower edge surface 41 as it goes toward the front end side of the needle body 2 (upper side of the paper surface in fig. 3), and an upper edge rear portion 4b which descends toward the lower edge surface 41 as it goes toward the rear end side of the needle body 2 (lower side of the paper surface in fig. 3).

The slider 3 of this example is mainly different from the slider 3 of embodiment 1 in that an engagement portion 31p is formed in each fin 31 (see fig. 4(III) as well). The engaging portion 31p is shaped to substantially follow the lower edge surface 41 and the upper edge rear portion 4b of the dust discharge window 4. Therefore, as shown in fig. 3(C), when the slider 3 is retracted to the deepest portion, the engaging portion 31p is accommodated in the dust discharge window 4. The inclination of the portion of the upper edge rear portion 4b that is connected to the upper edge front portion 4f is greater than the inclination of the other portions. The inclined portion engages with the engagement portion 31p of the slider 3 to guide the slider 3 to the trash discharge window 4, and the slider 3 is sunk below the slider groove 21.

The engaging portion 31p of the vane 31 abuts on the upper edge surface 40 of the dust discharge window 4 and moves down toward the bottom 21b of the slider groove 21, and as a result, the tip of the slider 3 also moves down. At this time, dust is present on the bottom portion 21b on the front side in the sliding direction (upper side in the drawing sheet of fig. 3) of the connecting portion, and the tip of the slider floats. In this example, the rear end side of the engagement portion 31p abuts against the lower edge surface 41 of the dust discharge window 4 on the rear side in the sliding direction with respect to the aforementioned butting portion, and the leading end of the slider 3 is prevented from floating from the slider groove 21. Therefore, the tongue 31t provided at the tip of the slider 3 can be more suppressed from protruding above the slider groove 21 than the configuration of embodiment 1.

According to the configuration of this example, the refuse can be easily discharged from the refuse discharge window 4 communicating with the portion on the rear end side of the bottom portion 21b of the slider groove 21, and the operation failure of the slider 3 due to the refuse accumulated in the slider groove 21 can be suppressed. In particular, in the present example, since the engaging portion 31p is pointed and the waste is easily pushed out from the slider groove 21, the waste can be effectively suppressed from accumulating in the slider groove 21.

Claims

1. A compound needle is provided with:

a slider slidably fitted into the slider groove to open and close the hook,

the trash discharge window has a shape that accommodates a rear end of a portion of the slider that is in sliding contact with a bottom portion of the slider groove when the slider is retracted to the rearmost position in the sliding direction,

at least a part of the dust discharge window is formed in a solid portion located on a rear end side in the sliding direction with respect to the slider groove.

2. The composite needle of claim 1,

3. The composite needle of claim 1 or 2,