JPS6269865A - Composite needle and its production - 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 comprising a hook portion and a slider portion slidably fitted to the hook portion, and a method for manufacturing the same. The compound needle is a type of stockinette knitting needle, and the hook portion and the slider portion move relative to each other, thereby opening and closing the hook at the tip of the needle stem, thereby allowing stockinette knitting to be performed.

(Prior art) The tip of the slider part that makes up the compound needle is fitted into the slider groove of the hook part trunk and slides in the axial direction within the groove, so its thickness is naturally much larger than the width of the slider groove. It is thin, about % of the thickness of the hook part. However, if the main part of the slider part is thinned in the same way, the strength of the slider part will decrease and there will be problems with maneuverability, so it is preferable that this part has the same needle thickness as the main part of the hook part. A compound needle in which the thickness of the slider portion differs between the tip and the trunk is known, and an example thereof can be seen in, for example, Japanese Patent Laid-Open No. 81358/1983.

(Problems to be Solved by the Invention) This prior art has the following manufacturing problems.

+1) When making a slider part by punching out a steel strip,
Processing requires the following six steps, making manufacturing complicated and difficult.

That is, milling the upper part of the tip to remove the cut surface of the tip, grinding the lower part of the tip, swaging to make the tip into a cylindrical shape in preparation for forging the tip, and turning the tip into a cylindrical shape. These are forging rolling to make the thickness approximately A, copy milling to form the upper part of the nose of the tip, and press cutting to form the lower part of the nose of the tip.

(2) As mentioned above, the material at the tip of the slider part requires a large amount of machining, and the material thickness is significantly different from that of the main body, so it is easy to cause distortion during the heat treatment process, and as a result,
Shape and dimensions vary and defects are likely to occur.

(3) After heat treatment, the slider part is barrel polished to remove press cut surfaces and edges, smooth the surface, and improve thread sliding and lubricity. The tip of the slider part is significantly smaller in shape and thickness than the trunk, so if barrel polishing is done in a uniform state, only the tip of the nose will be polished relatively more, and the nose will not be in the specified position. The shape is not finished, and the dimension A shown in FIG. 3 varies between products, which tends to result in defective products.

An object of the present invention is to eliminate the above-mentioned drawbacks and provide a high quality, high precision, high performance composite needle with little variation in size and shape.

Another object of the present invention is to provide a method for manufacturing the above composite needle at low cost by reducing the number of processing steps.

(Means for Solving the Problems) The first invention of the present application which achieves the above object is a composite needle consisting of a hook part and a slider part, wherein the hook part is provided at a trunk having a butt/slider groove and at the tip of the trunk. The slider part is composed of a slider trunk and a slider tip part thinner than the slider trunk, and the slider part is characterized in that the slider tip part and the slider trunk are joined and fixed.

Although the joining method may be used, it is preferable to provide a groove in the slider trunk and fit the slider tip into the groove to join and fix the two.

In this case, it is more preferable that at least one recess is provided at the tip of the slider, and the slider trunk is provided with a holding protrusion that corresponds to the recess and projects inside the groove of the slider trunk to join and fix the two. That's true.

In this case, it is more preferable that the recess is provided at the upper edge of the slider tip, and that the holding protrusion protrudes into the recess from both sides of the upper edge of both side walls of the groove of the slider trunk to join and fix the two. It is to be.

Further, the second invention of the present application which achieves the above object is a method for manufacturing a compound needle, which is composed of a hook part and a slider part, of which the slider part is composed of a slider trunk and a slider tip part thinner than the slider trunk,
After providing at least one recess in the upper edge of the slider tip and a groove in the slider trunk, insert the rear end of the slider tip into the groove in the slider trunk and adjust the shape and dimensions to desired dimensions. Then, by pressing with a press from above the recess, both side walls of the groove of the slider trunk are plastically deformed into the recess to form a holding protrusion, thereby fitting and fixing the slider tip into the slider trunk to form a slider portion. It is characterized by manufacturing.

Preferably, the slider tip to be inserted into the groove of the slider trunk is punched out of a copper strip that has been previously rolled and heat treated.

More preferably, the tip of the slider to be inserted into the groove of the slider trunk is punched out of a steel strip that has been previously rolled and heat-treated, and then barrel-polished.

Further, the pressing die preferably has an inverted semicircular shape or an inverted U-shape.

(Example) Hereinafter, the second invention of the present application will be explained in detail with reference to the attached FIGS. 1 to 3.

The compound needle of the invention shown in FIG. 1 consists of a hook part l and a slider part 1) which is slidable in a slider groove 4 in the hook part. The hook part 1 and the slider part 1) can open and close the hook 2 by mutual relative movement.

As shown in FIG. 2, the hook portion 1 consists of a hook 2 provided at the tip, a butt 3 that transmits motion from the outside, and an elongated trunk 5 that connects these. A slider groove 4 having a U-shaped cross section is bored in this trunk 5. The slider groove 4 has: - a bottom portion with a flat support surface 4a;
It is composed of both side walls and a rear wall forming an arcuate concave surface 4b. In this embodiment, the upper end of the slider a4 is an open end, but a guide rib as seen in Japanese Patent Application Laid-Open No. 60-39461 may also be provided at this portion.

As shown in FIG. 3, the slider portion 1) consists of a slider tip 14 provided at the tip, a butt 13 that transmits motion from the outside, and an elongated slider trunk 16 that connects these.

At the tip of the slider trunk 16, there is a groove 1 with a width approximately 2 times the needle thickness.
8 is bored, and the rear end of the slider tip 14 is fitted into this groove 18.

As shown in FIG. 4, the slider tip 14 has a width approximately twice the needle thickness of the slider trunk 16, has a nose 12 at the tip, and has at least one nose 12 at the rear (in the drawing, there are two noses).
Location) A recess 15 is provided.

The slider tip 14 is preferably punched from a continuous steel strip that has been rolled and heat-treated to a predetermined thickness, and then barrel-polished.

The slider tip 14 and the slider trunk 16 may be fitted together by any method as long as they are fixed and have an integral structure.

Therefore, various methods such as press-fitting, adhesion, and welding can be employed. However, in terms of workability, it is preferable to
Slider tip 1 having at least one recess 15
4 into the groove of the slider trunk 16, and both walls 19.1 of the groove of the slider trunk corresponding to the recess 15.
9 is provided with a holding protrusion 17 at the tip of the slider to fix the slider. Furthermore, as shown in FIGS. 3 to 5, a recess 15 is provided at the upper edge of the slider tip 14, and a slider tip holding protrusion 17 is provided on both walls 19 and 19 of the groove 18 of the slider trunk. It is most preferable in terms of strength and workability to make it protrude from the edge toward the space within the recess 15.

Next, an embodiment of the second invention of the present application will be described based on FIGS. 6 to 9.

6 and 7 are front views of the slider tip 14 and slider trunk 16, respectively, before they are integrated.

The slider tip 14 shown in FIG. 6 is made from a heat-treated hardened steel strip adjusted to a predetermined thickness.
It is preferable to manufacture the material by punching it out in a state with the following features and then barrel polishing to remove the punched surface.

Alternatively, the slider tip 14 can also be made from wire.

The slider trunk 16 shown in FIG. 7 is punched out from a copper strip adjusted to a predetermined thickness to include the butt 13, and then a groove 18 for fitting the slider tip 14 is formed at the tip, and further, Preferably, it is manufactured by heat treatment and barrel polishing. Alternatively, the slider trunk 16 can also be made from wire.

The slider tip 14 and slider trunk 16 manufactured in this way are integrated as a slider portion 1) as shown in FIGS. 3 and 4.

To explain the integration procedure, first, slider tip 1
Insert the rear end of 4 into the groove 18 of the slider trunk 16, and
Adjust the A dimension in the diagram. Next, as shown in FIG. 8, both side walls 19 and 19 of the groove 18 of the slider trunk 16
is fixed with vises 20, 20 from the left and right.

Next, from above the recess 15 of the slider tip 14,
Pressing is performed using a press die 21 having a concave surface 22 in the shape of a semicircle or an inverted U-shape. As a result, as shown in FIG.
The slider tip 14 protrudes into the space of the recess 15.
This means that it is strongly held from above, below, and from left and right. Instead of the press die 21, a punch with a circular cross section can also be used.

(Effects of the Invention) According to the present invention, the slider tip portion and the slider trunk portion are each split molded and processed separately, and then joined and fixed, so manufacturing is easy. Furthermore, since the assembly can be performed while adjusting dimension A in FIG. 3, a product with higher precision can be obtained.

In addition, as shown in the embodiment of the present invention, if the slider tip is manufactured by punching out a copper strip that has been rolled and heat treated in advance, it can be manufactured in one step and there is no distortion due to heat treatment. There is an effect. In addition, by barrel-polishing the slider tip before joining it to the slider trunk, there is no change in the shape of the nose tip.
A special effect is that a product with good dimensional accuracy can be obtained.

[Brief explanation of drawings]

FIG. 1 is a front view of a compound needle according to an embodiment of the present invention, FIG. 2 is a sectional view of the hook portion, FIG. 3 is a front view of the slider portion, FIG. 4 is a plan view of the slider portion, and FIG. 5 is a V-V sectional view in Fig. 4, Fig. 6 is a front view of the tip of the slider part, Fig. 7 is a front view of the slider part trunk, and Fig. 8 is a front view of the slider part tip.
9 and 9 are cross-sectional views showing a method of processing the slider portion. 1...Hook part, 2...Hook, 3...
・Butt, 4...Slider groove, 5...
・Executives, 1)...Slider part, 12
...Nose, 13...Slider butt, 14...Tip part, 15...Concave part, 16
...executive, 17...protrusion, 18...
Groove, 19...Wall, 20...Vise,
21... Press mold, 22... Recessed part. Patent Applicant Fukuhara Needle Co., Ltd. Agent Takashi Yukinai (and 1 other person) Figure 4 Figure 5 Figure 6 Figure 8 Figure 9 Procedural Amendment Statement 1) Month 1, 1985

Claims (8)

[Claims] (1) A composite needle consisting of a hook part and a slider part, where the hook part consists of a trunk having a butt and slider groove and a hook provided at the tip of the trunk, and the slider part has a thickness thinner than that of the slider trunk and the slider trunk. 1. A compound needle comprising a slider tip, wherein the slider tip and a slider trunk are bonded and fixed. (2) The composite needle according to claim 1, wherein a groove is provided in the slider trunk, and the slider tip is fitted and fixed into the groove. (3) The compound according to claim 2, wherein the slider tip is provided with at least one recess, and the slider trunk is provided with a holding protrusion that corresponds to the recess and projects inside the groove of the slider trunk. needle. (4) the recess is located at the upper edge of the slider tip, and
4. The compound needle according to claim 3, wherein the holding projections protrude into the recess from both upper edges of both side walls of the groove of the slider trunk. (5) A method for manufacturing a composite needle consisting of a hook part and a slider part, of which the slider part consists of a slider trunk and a slider tip thinner than the slider trunk, the needle having at least one needle on the upper edge of the slider tip. After forming a recess and providing a groove in the slider trunk, insert the rear end of the slider tip into the groove in the slider trunk, adjust the shape and dimensions to the desired dimensions, and press with a press from above the recess. , a composite structure characterized in that a holding protrusion is formed by plastically deforming both side walls of the groove of the slider trunk into the recess, and the slider tip is fitted and fixed to the slider trunk to manufacture the slider part. How to make needles. (6) The method for manufacturing a composite needle according to claim 5, wherein a slider tip punched from a steel strip that has been previously subjected to rolling heat treatment is inserted into a groove in the slider trunk. (7) The method for manufacturing a composite needle according to claim 5, wherein the slider tip is punched from a steel strip that has been previously subjected to rolling heat treatment and barrel-polished is inserted into the groove of the slider trunk. (8) The method for manufacturing a compound needle according to any one of claims 5 to 7, wherein the pressing die has an inverted semicircular shape or an inverted U-shape.