JPH0348238Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a needle for a tufting machine for producing tufted carpet.

[Conventional technology]

In the tufting machine, as shown in FIG. 3, pile threads 22 are implanted into a base fabric 21 moving in the horizontal direction by a needle A moving up and down in the vertical direction.
The pile yarn is locked to the looper 24, and the looper is moved back, so that the loops 23 are created one after another. The needle A has a sharp tip and is provided with a thread insertion hole 31 having an oval planar shape slightly above the tip.

Conventionally, two types of needle tip shapes of this type of needle are known.

FIG. 4 shows a needle of a first conventional example, in which an upper half 32 has a round bar shape, a lower half 33 has a flat shape, and a needle tip 34 whose apex is on the center line
It is equipped with the following.

FIG. 5 shows a second conventional needle, which has a needle tip 34 having a slope 35 at a predetermined angle at the tip and having an apex on one end surface 36 in the wide direction.

[The problem that the idea aims to solve]

However, in the needle of the tufting machine of the first conventional example, as shown in FIG. Since the needle tip is located in the center of the section and the distance between the needle tip and the looper tip is small, the needle to be inserted next will engage and become entangled with this loop, resulting in partial chain piles 25 and uneven pile surfaces. There was a problem that could be solved.

In addition, as shown in Fig. 7, when the needle is intermittently moved horizontally by the cross-over machine to create a pattern, the needle tip catches the pile thread 22 or breaks the thread, creating a loop. The looper is loose and the loop hookability of the looper is poor, and the knife (not shown)
When cutting the loop with a looper, miscuts occur, resulting in a carpet with uneven cut piles.

Furthermore, in the needle of the tufting machine of the second conventional example, since a base fabric having a plain weave structure with a relatively coarse weave is normally used, when penetrating through this, the 8th
As shown in the figure, the weaving threads are partially displaced by the large slope 35, resulting in relatively large through holes, making it difficult to create a beautiful pile surface.

This idea was made in view of these conventional problems, and the problem was to create a tufting machine that could create beautifully aligned loop piles and cut piles by changing the position of the top of the needle tip. The aim is to provide the following needles.

[Means to solve the problem]

In order to solve the above problem, in this invention, the needle tip of the needle is shifted by a required amount in the direction away from the looper of the tufting machine from the center line of the needle body when viewed from the front of the thread insertion hole provided in the needle body. It was placed in the position of a vine.

[Effect]

The needle of the tufting machine configured in this way has the apex of the needle tip deviated when viewed from the front of the thread insertion hole, so it is difficult to catch the created loop.
It does not break, and both sides of the needle tip are smooth, so there is no chance of creating a large through hole when piercing the base fabric.

〔Example〕

1 and 2 show an embodiment of this invention. As shown in the figure, the needle of the tufting machine consists of a round bar-shaped upper half part 1 and a flat lower half part 2, and a long oval thread insertion hole 3 is provided at the end of the lower half part 2 along the axis. A needle tip 4 is provided at the tip of the thread insertion hole 3, and the needle tip 4 has its apex at a position offset by a required amount l from the center line X of the thread insertion hole 3 when viewed from the front. This deflection position is a position away from the looper of the tufting machine.

To explain this needle tip 4 in detail, as shown in FIG. :1, and both side edges facing the apex are formed into smooth curved surfaces. Note that the dimensional ratio of m:n for the needle, which determines the position of the apex of the needle tip, can be appropriately selected depending on the application.

When using the needle of the tufting machine of this invention, the needle tip is in an eccentric position and the distance between the needle tip and one side edge is long, so it is difficult to get tangled in the preceding loop when creating a loop, unlike conventional tufting machines. chain piles will not occur. Furthermore, when the needle is moved laterally intermittently by a crossover machine, the needle tip escapes from the loop by the amount of eccentricity, so the pile yarn is not caught.

Further, when penetrating the base fabric, unlike the second conventional example, there is no large slope at the tip, so a large through hole is not formed.

It is important to attach the eccentric needle of this invention to the needle attachment part of the tufting machine with the eccentric direction aligned.

[Effect of idea]

According to this invention, as described above, the tip of the needle is deflected in the direction away from the looper, so it can be used for various types of products, such as those with a mixture of cut pile and loop pile, and those with patterned patterns manufactured using a crossover machine. The pile surface of the tufted carpet can be manufactured to have a beautiful uniformity, and the number of defective products can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an embodiment of this invention, and FIG. 2 is an enlarged view of the main parts of the same. Fig. 3 is an explanatory diagram of the action of the needle in the tufting machine, Fig. 4 is a plan view showing the first conventional example, Fig. 5 is a plan view showing the second conventional example, and Figs. 6 and 7 are the plan view showing the first conventional example. FIG. 8 is an explanatory diagram showing troubles occurring in the conventional example. FIG. 8 is an explanatory diagram showing troubles occurring in the second conventional example. 1,32...upper half, 2,33...lower half,
3, 31... Thread insertion hole, 4, 34... Needle tip, 21
...Base fabric, 23...Loop, 24...Looper.

Claims (1)

[Scope of utility model registration request] A needle for a tufting machine is composed of a round bar-shaped upper half and a flat lower half, and has a thread insertion hole in the lower half and a needle tip at its tip.The needle tip is located in front of the thread insertion hole. A needle for a tufting machine characterized by being located at a position offset by a required amount in a direction away from the looper of the tufting machine from the center line of the needle body as seen from above.