JPS62206069A - Composite needle for knitting machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a compound needle for a knitting machine that is composed of a hook member and a slide member.

[Conventional technology]

The latch needle, which has traditionally been widely used as a needle for knitting machines, is
Since the stroke amount of the reciprocating movement is large, the number of yarn feeders is limited. ■Durability is poor because the shaft support (rivet) that rotatably supports the latch relative to the hook member tends to rattle, and the latch tip and hook collide with each other, causing mutual wear. ■Since the latch opens and closes using a thread loop, it has drawbacks such as being unable to handle high speeds.

Therefore, we reduced the stroke amount of the reciprocating movement by half to increase the number of yarn feeders, brought the hook member and slider into light contact to reduce mutual wear, and improved durability. A compound needle was proposed that could achieve higher speeds and improve productivity by operating the needle.

As an example of this type of compound needle, one described in Japanese Patent Laid-Open No. 118934/1984 is known. In order to guide the reciprocating movement of the slide plate in the envelope body of the needle, that is, the hook member, this compound needle forms a hole with a rectangular cross section along the longitudinal direction, and the slide plate slides into this hole, that is, the cavity. It is configured so that it can be inserted freely.

However, in this prior art, after the slide plate is inserted into the hole of the hook member, the ends of both side walls of the hole must be bent, which is a cumbersome process. Moreover, the slide plate must be held by the walls on both sides of the hole to prevent it from collapsing in the plate thickness direction or in the plate width direction, thereby ensuring proper engagement between the hook and the tip of the slide plate during operation. Therefore, when forming holes, high accuracy is required to determine the inner dimensions in the thickness direction and the inner dimension in the width direction.

However, since there are actually variations in processing accuracy, the slide plate falls down in the plate thickness direction and the plate width direction, and the engagement between the hook and the tip of the slide plate becomes unstable, resulting in a disadvantage of impairing reliability.

To this end, a compound needle described in Japanese Patent Publication No. 60-59338 has been proposed as a compound needle which eliminates the above-mentioned drawbacks.

This compound needle has a recess in which the hook portion is formed by a stem and two necks, the vertical edges of the recess receiving the free end of the slider and allowing reciprocating movement. A slit that communicates with the body and the neck is provided, and the rear edge of the free end of the slider is supported by the supporting surface of the base of the slit, and the free end of the slider is prevented from falling outward, that is, as described in the above-mentioned prior art. The vertical edge of the recess is configured to prevent the plate from falling in the width direction.

[Problem that the invention seeks to solve]

The compound needle proposed above has a structure in which the free end of the slider is slidably inserted into the slit in the hook portion, so the thickness of the free end of the slider must be made thinner than the width of the slit. As a result, the bending rigidity of the free end of the slider in the thickness direction is reduced, and there is a risk that bending deformation in the thickness direction of the slider free end may occur.

If the free end of the slider is bent in the thickness direction, the engagement between the hook and the tip of the free end of the slider becomes unstable, reducing reliability. Further, like the holes in the prior art described above, the slits must be formed with a high degree of finish, making processing cumbersome. Moreover, since the slit has an arcuate concave edge at the rear end, wire rings tend to accumulate in this area, and by forming the slit, the plate thickness in the slit forming area becomes thinner, reducing the rigidity of the hook part. There were various problems such as:

This invention was made in view of such prior art,
The rigidity of the slide member (corresponding to the slider of the prior art) and the hook member are improved to prevent deformation of both, ensuring proper engagement between the hook and the tip of the slide member, and providing excellent workability and line-up. An object of the present invention is to provide a compound needle for a knitting machine that can prevent rings from accumulating.

[Means for solving problems]

In the compound needle for a knitting machine according to the present invention, a groove-shaped guide support portion that bulges toward the slide member is formed along the longitudinal direction on the side edge of the hook member facing the slide member. A fitting portion of the slide member is fitted and supported in the guide support portion so as to be able to freely reciprocate, and a fork portion that is open longitudinally forward is formed on the slide member side of the hook member, and a fork portion that opens longitudinally forward is formed on the hook member side of the slide member. Open fork portions are formed, and these fork portions are fitted into each other so as to be reciprocally movable, and the open end of the hook gradually expands toward the fitted tip at the open position of the hook at the tip of the slide member. A fitting groove is formed that faces the opening hook.

[Effect]

In this invention, since the fitting portion of the slide member is fitted and supported by the groove-shaped guide support portion formed in the hook member, the slide member can be formed to have the same thickness as the hook member. . Further, no thin wall portion is formed in the hook member. The falling of the slide member in the board width direction is suppressed by the fitting of the fork parts formed on the hook member and the slide member, respectively, and the hook-oriented fitting that gradually expands toward the tip formed at the tip of the slide member The leading end of the slide member and the hook are properly engaged by the guiding action of the mating groove.

〔Example〕

FIG. 1 is an exploded side view showing an embodiment of the present invention. In the figure, 1 is a hook member, 2 is a slide member, and these members 1.2 are press-formed steel plates of the same thickness. The original form is formed by this. One butt IA is formed at the rear end of the hook member, and one butt 2A is formed at the rear end of the slide member 2.

A hook IB is formed at the tip of the hook member 1, and a groove-shaped guide support portion that bulges toward the slide member 2 is provided on the side edge of the hook IB facing the slide member 2 at slightly 11N'J. 3 are formed along the longitudinal direction.

As shown in FIG. 2, the groove-shaped guide support portion 3 is formed to have a V-shaped cross section that gradually widens toward the slide member 2 side.

In the hook member 1 shown in FIG. 1, a fork portion 4 that is opened forward in the longitudinal direction is formed a little forward of the intermediate portion between the groove-shaped guide support portion 3 and the distal IA and on the slide member 2 side.

The groove-shaped guide support portion 3 is provided at the tip of the slide member 2.
A fitting part 5 is formed to be fitted and supported in a reciprocating manner,
The cross-sectional shape of the fitting portion 5 is approximately shaped like a water drop, as shown in FIG.

In the slide member 2 of FIG. 1, the fitting part 5 and the pan) 2
A fork portion 6 that is open toward the rear in the longitudinal direction is formed on the side of the hook member 1 at an approximately intermediate portion with A.

In the fork part 4 of the hook member 1 and the fork part 6 of the slide member 2, the width dimension of the notches 4A and 6A is the same as that of the extension piece 4.
The size is set such that B and 6B can be slidably fitted in the longitudinal direction.

Further, a fitting a facing the hook IB is fitted to the tip of the slide member 2, as shown in FIG.
7 is formed. As shown in FIG. 5, this fitting groove 7 is formed in a shape that gradually widens toward the tip. The opposite end surfaces of the hook member 1 in the thickness direction side walls 7a and 7b of the fitting groove 7 correspond to the extension locus of the curve drawn by the opposite end surface of the hook member l in the fitting portion 5. It is formed with a gentle curve.

The hook member 1 and the slide member 2 are assembled as shown in FIGS. 6 and 7. That is, the fitting part 5 of the slide member 2 is fitted into the groove-shaped guide support part 3 of the hook member 1 (see FIG. 7), and the fork part 4 and the fork part 6 are assembled in a fitted state. It will be done. Then, the slide member 2 reciprocates as a stroke amount between a position where the slide member 2 closes the hook IB shown in FIG. 6 and a position where the slide member 2 opens the hook IB shown in FIG.

In the above configuration, the fitting portion 5 of the slide member 2 is fitted into the groove-shaped guide support portion 3 formed on the hook member 1, and both members 1.2 are slidably combined, so that the slide member 2 The plate thickness can be made the same as that of the hook member 1, and the rigidity of the slide member 2 is improved.

Furthermore, since no thin wall portion is formed in the hook member 1, the rigidity of the hook member 1 does not decrease. By these conditions,
It is possible to prevent the hook member 1 and the slide member 2 from being bent in the thickness direction, especially at the tip end sides. Therefore, hook I
When B is closed, the upward fitting groove 7 formed at the tip of the slide member 2 and the open end 1b of the hook IB are prevented from shifting in the thickness direction, and the fork part 4 and the fork part 6 are Since the slide member 2 can be prevented from falling in the direction away from the hook member 1 by fitting with the slide member 1, the open end 1b of the hook IB can be properly fitted into the upward fitting groove 7 at the tip of the slide member 1. A good meshing condition is obtained.

In fact, even if the open end 1b of the hook member 1 and the upward fitting groove 7 at the tip of the slide member 2 are slightly misaligned in the plate thickness direction, the fitting groove 7 facing the hook IB gradually moves toward the tip. Since it is formed in an expanding shape, the aforementioned positional deviation can be absorbed by the expanding end portion, and the open end 1b of the hook IB can be guided and fitted into the upward fitting groove 7.

Furthermore, the groove-shaped guide support part 3 does not require high precision and can be easily formed by mechanical cutting and press working, so it has excellent workability and does not accumulate wire rings.

FIG. 9 is an enlarged side view showing a modification of the tip of the slide member 2. In this figure, side walls 7a and 7b in the thickness direction of the fitting groove 7 formed at the tip of the slide member 2 (however, (Only one side wall portion 7a is shown in FIG. 9) is
The hook members 1 are respectively bulged in opposite directions.

In this way, by using a compound needle in which the side walls 7a and 7b in the plate thickness direction of the fitting groove 7 are bulged as a dial needle of a double knit knitting type, the hook of the dial needle and the hook of the cylinder needle, In other words, the hook and hook of the cylinder needle, which are disposed with an axis perpendicular to the dial needle, can prevent the inconvenience of old loops entering the yarn feeding side.

That is, the inconvenience of the old loop OR corresponding to the vicinity of the tip of the slide member of the dial needle moving in the direction of the arrow and entering the yarn feeding (not shown) side is prevented, thereby making double knit knitting possible.

In addition, it is desirable to set the height h of the swelling part to approximately the same value as the yarn diameter of the old loop OR, and also
, 7b may be bulged. However, since the tip of the slide member 2 is manufactured by obtaining its original shape by press working and then forming the fitting groove 7 by mechanical cutting, in fact, each of the side wall parts 7a and 7b is It becomes a bulging configuration.

〔Effect of the invention〕

As explained above, according to the present invention, the rigidity of the slide member and the hook member is improved, and deformation of both is prevented.
This ensures proper engagement between the hook and the tip of the slide member, has excellent workability, and has the effect of preventing the wire ring from pooling.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an exploded side view of a hook member and a slide member, FIG. 2 is a cross-sectional view taken along the line nn in FIG. 1, and FIG. Sectional view along 4th
The figure is an enlarged sectional view of the tip of the slide member, Figure 5 is an enlarged plan view showing the fitted state of the hook and the hook-oriented fitting groove, and Figure 6 is a side view when the slide member is in the hook closed position. , FIG. 7 is a side view when the slide member is in the hook open position, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 6,
FIG. 9 is an enlarged side view showing a modification of the tip of the slide member. 1... Hook member, IB... Hook, 1b...
- Open end, 2... Slide member, 3... Groove-shaped guide support part, 4... Fork part, 5... Fitting part,
6...Fork part, 7... Fitting groove facing the hook, 7a, 7b... Side wall part

Claims (2)

[Claims] (1) A knitting device comprising a hook member and a slide member, in which the hook member and the slide member are capable of reciprocating from a closed position where the hook of the hook member is closed at the tip of the slide member to an open position where the hook is released. In the compound needle for machine use, a groove-shaped guide support portion that bulges toward the slide member side is formed along the longitudinal direction on the side edge of the hook member facing the slide member, and the hook member is slidable into the guide support portion. The fitting portions of the members are fitted and supported so as to be reciprocally movable, and a fork portion that opens longitudinally forward is formed on the slide member side of the hook member, and a fork portion that opens longitudinally rearward is formed on the hook member side of the slide member. The fork portions are fitted into each other so as to be reciprocally movable, and the fork portions gradually expand toward the tip where the open end of the hook is fitted in the closed position of the hook at the tip of the slide member. A compound needle for knitting machines characterized by forming a fitting groove facing the hook. (2) The compound needle for a knitting machine according to claim 1, wherein at least one of both side wall portions in the plate thickness direction of the fitting groove bulges in a direction opposite to the hook member.