JPS6321593Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is a multi-needle sewing machine in which multiple sewing needles are arranged in parallel in order to sew multi-colored embroidery patterns. The present invention relates to a needle thread gripping device for stopping drooping of the needle thread.

(Prior Art) In conventional multi-needle sewing machines, in order to restrict the drooping of the thread tail of the upper thread, the thread tail is held by being inserted between, for example, a pair of presser plates that are in elastic contact with each other.

(Problems to be Solved by the Invention) Therefore, a pair of presser plates is required for each sewing needle, which increases the installation space for the gripping mechanism and complicates the gripping mechanism.

An object of the present invention is to provide a needle thread gripping device that can simplify and downsize the mechanism for gripping the end of the needle thread.

(Means for Solving the Problems) The present invention is aimed at displacing a needle bar case near the lower end of a needle bar case which is horizontally movable in order to selectively displace a plurality of parallel sewing needles from a standby position to a knitting position. At the front, a coil spring is horizontally mounted in which a group of coils are arranged and formed to be elastically expandable in order to removably insert and elastically clamp the ends of the upper threads inserted into each of the sewing needles. The gist of this invention is an upper thread gripping device.

(Function) In a multi-needle sewing machine, the device of the present invention is designed to grip the end of the needle thread inserted into the sewing needle in the standby position by press-inserting it between arbitrary coils of a coil spring horizontally suspended above the row of sewing needles. It is composed of

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the figure, 1 is a multi-needle sewing machine that is installed horizontally movably and has a plurality of needle bars (not shown) inside. Needle bar cases 2 to 2 are sewing needles fixed to the lower ends of each needle bar, and the sewing needles 2 selected from the sewing needle row 3 in which a plurality of sewing needles 2 are arranged in parallel are attached to the needle bar case 1. It is selectively displaced from the standby position to the sewing position under the movement control of , and is driven up and down at the sewing position.

Reference numeral 4 denotes a thread take-up, which is swingably supported on the upper end of the needle bar case 1 in order to adjust the supply tension of each needle thread U supplied to each sewing needle 2, respectively;
is a guide plate attached horizontally to the vicinity of the front center of the needle bar case 1, and each needle thread U pulled out from a bobbin (not shown) is folded upward at the guide hole of the guide plate 6. balance 4
It is inserted into the guide hole 4a of the sewing needle 2, and then folded back downward and inserted into the needle hole of the sewing needle 2.

Reference numerals 6 and 6 denote a pair of left and right support pieces respectively attached to both front ends of the lower end of the needle bar case 1, and 7 denotes a thread end U1 of each needle thread U inserted into the sewing needle 2 in the standby position.
A tension-type coil spring is horizontally suspended near the upper part of the sewing needle row 3 in front of the needle bar case 1 and is formed to be elastically expandable and retractable in order to removably clamp the thread end U1 and prevent the thread end U1 from drooping. and the coil group 7a
~7a are arranged in light elastic contact or with a minute gap in order to press and hold the upper thread U, one end of which is hooked to one support piece 6, and the other end is hooked to one support piece 6. The needle thread U is inserted into the sewing needle 2 in a standby position and is hooked on an adjustment bolt 9 which is inserted through the sewing machine so as to be horizontally adjustable and has a nut 8 screwed thereon.
The thread end U1 of the sewing needle 2 can be indiscriminately press-inserted between arbitrary coils 7a arranged near the upper part of the sewing needle 2 and held, and the gripped upper thread U can be held between the coils 7a.
It can be pulled out against the clamping pressure between the two, and furthermore,
Adjust the coil spring 7 by moving the adjustment bolt 9.
The clamping pressure between the coils 7a can be finely adjusted simultaneously in accordance with the thickness of the upper thread U.

Next, the operation and effects of the embodiment having the above configuration will be explained.

In this example, in order to selectively displace a plurality of sewing needles 2 arranged in parallel from a standby position to a knitting position, each sewing needle 2 is located in front of the lower end of a needle bar case 1 that is installed to be horizontally movable. In order to removably insert and elastically clamp the thread ends U1 of the needle threads U inserted through the threads, a coil spring 7, which is formed to be elastically expandable and expandable with coil groups 7a arranged, is horizontally suspended. be.

For this reason, it is possible to treat the thread end U1 of the upper thread U so that its drooping is restricted by simply press-fitting the thread end U1 of the unnecessary upper thread U between the coils 7a of the coil spring 7 indiscriminately. This feature has the advantage of significantly simplifying the thread end processing operation of the upper thread U.

In particular, since the upper thread U is gripped by the spiral shape of the coil spring 7, the upper thread U can be inserted indiscriminately into an unspecified part of the coil spring 7 with one touch and can be accurately clamped. , the insertion operation of the upper thread U can be simplified, and the clamping pressure between the coils 7a on the upper thread U can be adjusted simultaneously over the entire length by expanding and contracting the coil spring 7. This has the effect of significantly simplifying the gripping force adjustment operation associated with the change.

(Effect of the invention) In other words, the present invention has a needle bar case installed in the front near the lower end of the needle bar case which is installed to be horizontally movable in order to selectively displace a plurality of parallel sewing needles from the standby position to the knitting position. In order to removably insert and elastically clamp the ends of the upper threads inserted into each of the sewing needles, a coil spring is arranged horizontally and is formed to be elastically expandable and contractable. Therefore, it is possible to significantly simplify the thread end processing operation of the needle thread, and also to simplify the adjustment operation of the gripping force of the thread end.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the main parts, FIG. 2 is a side view, and FIG. 3 is an enlarged front view of the main parts. 2...Sewing needle, 3...Sewing needle row, 7...Coil spring, 7a...Coil, U...Needle thread, U1...
Itojiri.

Claims (1)

[Scope of utility model registration request] In order to selectively displace a plurality of parallel sewing needles from a standby position to a sewing position, a needle bar case is installed so as to be horizontally movable.A needle bar case, which is installed horizontally movably, has a needle bar case that is inserted into the needle bar case, which is inserted into the needle bar case. An upper part of a multi-needle sewing machine characterized in that a coil spring, which is formed by an array of coils and is formed to be elastically expandable and contractible, is horizontally suspended in order to removably insert and elastically clamp the tail end of a thread. Thread gripping device.