JPH0347349B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for tufting pile by inserting pile yarn into a base fabric, and at the end of the tufting, there is a gap between the needle and the base fabric or between the needle and the looper. This invention relates to a technique for cutting pile yarns (hereinafter referred to as empty yarns) that are separated from a base fabric.

[Conventional technology]

Conventional empty fiber cutting involves manually driving the tufting device forward and backward several times within the range where the needle does not insert the pile yarn into the base fabric, thereby engaging the looper and knife several times, and finally tufting and locking it to the looper. The method involved cutting the pile thread loops.

Regarding this empty fiber cutting, the present inventor has completed a tufting device that automatically stops only the needle and drives only the looper and knife in the same way as when tufting, thereby eliminating the need for manual forward and reverse reciprocation. (Japanese Patent Application Laid-open No. 62-41363).

In addition, the present inventor has attempted a method in which the looper and knife are engaged several times by using a servo motor to automatically drive the needle in forward and reverse directions within a range that does not pierce the pile yarn into the base fabric.

[Problem to be solved by the invention]

By the way, there are 2 to 3 loopers that work with the knife.
On the other hand, the base fabric is fed out a certain amount toward the looper for each stitch in which the needle passes one pile yarn loop to the looper, and as the base fabric moves, the base fabric is first engaged. The stopped pile yarn loop is fed to the cooperative operating position of the knife and looper and cut to form a cut pile.

For this reason, even if only the looper and knife work together without tufting the needle, the base fabric will not move, and the pile thread loop held by the looper will not be sent to the position where the knife and looper work together. ,
Therefore, the pile yarn loop remains locked to the looper without being cut.

Therefore, when cutting the empty fibers, the base fabric must be moved toward the looper by some method in order to bring the pile yarn loop to be cut into the cooperative operating position of the looper and knife.

Conventionally, the movement of the base fabric during empty fiber cutting has been done manually, and there is a need for automation.

[Purpose of the invention]

Therefore, the present invention aims to improve the efficiency of the empty fiber cutting operation by automatically moving the pile yarn loop to be cut to a position where the looper and knife work together when cutting the empty fibers. .

[Structure of the invention]

The present invention achieves the above object, and is a tufting device equipped with a knife 13 that cuts a pile yarn loop 12 held by a looper 11 in cooperation with the looper.
On the side facing the looper with O' as the boundary, the base fabric 14 and the looper 11 are placed beyond the needle axis O-O'.
The gist is to provide a loop pushing member 15 that appears and retracts between the holes.

1, 2, and 3 specifically illustrate the present invention, and 15 is a loop pushing member, and during tufting operation, the needle axis O-
It retreats from O' and stops hidden under the finger 16, and therefore the needle 17 and the looper 1
1 (FIG. 2), and when the needle 17 rises and comes out of the base fabric 14 at the end of tufting, the loop pushing member 15 advances into between the base fabric 14 and the looper 11. several pile thread loops 15, which are locked on the looper 11, are pushed out into the cooperating position with the knife 13 (see Fig. 1).
(Fig. 3), then the knife 13 rises and the looper 1
The operation timings of these pile yarn loops 15 are set so as to cut these pile yarn loops 15 at once in cooperation with the pile yarn loops 15.

Note that the loop pushing member 15 is shown in FIGS. 1 and 2.
In the figure, the third
In the figure, they are driven to translate in parallel to the base fabric, but these drives are performed using conventional techniques.

Also, the looper 11 in FIGS. 1 and 2
is a so-called spring-loaded looper that engages and disengages the pile yarn loop 15 according to the strength of the tension applied to the pile yarn 18, thereby selectively forming a cut pile 19 and a loop pile 20, and 21 is involved in the engagement and disengagement. It's a spring.

The looper 11 in FIG. 3 is used exclusively for cut pile, and has a collar 22 protruding from the lower side of its tip to prevent the pile yarn loop 15 from coming off.

〔Effect of the invention〕

According to the present invention, the empty fibers are automatically cut without moving the base fabric, and the base fabric is separated from the looper and needle and can be freely moved or removed from the tufting device.

Furthermore, since it is not necessary to move the base fabric when cutting the empty threads, the problems that were seen when manually moving the base fabric excessively are eliminated: (2) The base fabric is stretched by the pile yarn loop that is still attached to the looper, causing it to become loose or damaged; (3) On the contrary, the looper is pulled against the base fabric by the pile yarn loop. (4) The pile yarn loop held by the spring-loaded looper is subjected to strong tension and comes off, causing the empty yarn to be uncut. This eliminates the inconvenience of being removed from the base fabric for a long time.

As described above, according to the present invention, empty fiber cutting can be carried out smoothly, and the present invention is particularly advantageous in so-called spot tufting, in which the empty fibers are cut, the base fabric is moved, and the pile is tufted in a discrete manner. be.

[Brief explanation of drawings]

1, 2, and 3 are sectional side views of essential parts of a tufting device according to the present invention, respectively. 11... Looper, 12... Pile yarn loop,
13... Knife, 14... Base fabric, 15... Loop pushing member, 16... Finger, 17... Needle, 18... Pile thread, 19... Cut pile,
20...Loop pile, 21...Spring.

Claims (1)

[Claims] 1. Pile yarn loop 1 secured to looper 11
In the tufting device, the base fabric 14 and the looper 11 are cut across the needle axis O-O' on the side facing the looper with the needle axis O-O' as the boundary. An empty fiber cut tufting device comprising a loop pushing member 15 that moves in and out between the hollow fibers.