JPS6053176A - Stitch sewing 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 the Invention The present invention relates to the adjustment of the position of the upper crocheting needle in an overlocking machine, so that during the known movement of the sewing needle and the crocheting needle there is no difference between the two. The necessary adjustments can be made.

BACKGROUND OF THE INVENTION It is known that in order to properly form a crochet stitch, the movement of the upper crochet needle must be synchronized with both the lower crochet needle and the sewing needle.

Attempts to achieve this condition have relied on adjustment means, as is well known, by adjusting the movement of a rod supporting the crochet needles, or by adjusting the position of the crochet needles relative to the rod.

An example of such adjustment is described in US Pat. No. 3,670,677. However, in these examples, the tip of the crochet needle is not arranged in a plane perpendicular to the sewing needle, and is not arranged along a straight line perpendicular or parallel to the trajectory of the sewing needle.

(Means for Solving the Problems) The purpose and technical problem of the present invention is precisely to provide a means for achieving desired synchronization between sewing needles and crochet needles, and a means for achieving desired synchronization between sewing needles and crochet needles. The object of the present invention is to achieve a means for adjusting the position of a crochet knife in any direction regardless of manufacturing defects of the pivot point of a mechanism for driving a crochet needle or dimensional errors of a lever constituting this mechanism.

This technical problem is solved by the mechanism described below for adjusting the position of the upper crochet needle in a crochet machine. That is, the mechanism includes a clamp for holding the crochet needles, the clamp having a pin disposed in a hole perpendicular to the axis of the rod transmitting motion to the crochet needles; The heel can be secured to the clamp in a position substantially perpendicular to the pin so that the crochet needle is angled to the heel and can be adjusted vertically along the basket.

The crocheting needle 1 is attached to the upper end of a drive rod 2 which is reciprocatable and swingable by a mechanism M which will be explained in detail below.

The rod 2 is articulated via a pivot 3 to a swinging arm 4 that swings around a pivot 5. The end of the rocking arm 4 opposite the articulation pivot 3 is provided with a spherical head 6 fitted into a spherical cavity in a connecting rod 7, the connecting port rad 7 being driven by a crankshaft 8 in a known manner. be done.

The rod 2 slides in a sliding guide 9 provided with a tailpiece 9a, the axis of which intersects the axis of the rod 2, and the tailpiece 9a rotates in a bearing 10.
0 is fixed by a set screw 11 in an appropriate space 12a formed in the housing 12 of the overlocking machine.

The washer 13, held in place by a screw 14 threaded axially into the tailpiece 9a, (3) prevents the tailpiece 9a from being pulled out of the bearing 10;

Reference numeral 15 indicates the plane of the sewing needle plate, and reference numeral 16 indicates the axis of the sewing needle (not shown).

Regarding the dimensions and arrangement of the elements shown in FIG. 1, the tip 1a of the knitting needle follows a path indicated by 17, which path corresponds to an arc of large radius.

As is well known, between the position of the sewing needle or the position of the tip of the upper crocheting needle that moves up and down along the axial direction of the trajectory, this tip is connected to the trajectory 16a of the lower crocheting needle (not shown) and the trajectory of the sewing needle. 160. Formation of an overlock stitch occurs when properly synchronized so that both can be traversed.

Mechanism M was realized to adjust this synchronization.

This mechanism M is a clamp 18 for holding the crochet needles.
, the clamp 18 has a body with a pin 19 , the pin 19 having a hole 2 perpendicular to the axis of the rod 2 .
extending outwardly from the body to be received within the body. The clamp 18 is provided with a hole (4) which is substantially perpendicular to the pin 19 and in which the basket 21 of the crocheting needle 1 can be fixed by means of a screw 22.

With the clamp 18 thus formed, the crochet needle 1 can be configured to be positioned at any desired position. The crocheting needles 1 can therefore be adjusted angularly around the heel 21, as shown by arrows A-A, and vertically along the heel itself, as shown by arrows B-B.

Once the crocheting needle 1 is positioned in the correct position both angularly and vertically, the crocheting needle 1 is locked in place by a screw 22 which passes through a hole in which the basket 21 is inserted. It is placed in place and presses and locks itself.

The clamp 1 is integrated with the clamp 18 and is connected to the clamp 1 by a screw 22.
The crocheting needle 1 locked at 8 can also be adjusted to the rotation of the pin 19 and locked by the screw 23 as shown by the arrow CC.

However, other modifications or changes to the mechanism in question may be made without departing from the scope of the invention.

(Effects of the Invention) As detailed above, in the mechanism, all necessary adjustments are concentrated in the clamp that holds the crochet needles.
Even after operation, there is an advantage that synchronization conditions can be easily obtained again by positioning only the crochet needles during a period in which the coupling is powered off.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view showing the movement of the upper crochet needle. FIG. 2 is a partially sectional front view of FIG. 1. FIG. 3 is a perspective view of a mechanism that is a main part of the present invention. Explanation of symbols 1...Crochet needle 2...Rod 3.
... Pivot 4 ... Swinging arm 6 ...
... Spherical head 7 ... Connection rod 9.
・・・・・・Wandering guide 10・・・Bearing 12・・・・
Housing 16...Race 19...
Hiso 69-

Claims (4)

[Claims] (1) consisting of upper and lower crochet needles, a sewing needle, and a swingable and reciprocatable drive rod 2 connected to drive means for supporting the upper crochet needles and effecting the movement of the upper crochet needles; Clamp 18 on the Kagashi sewing machine
the clamp 18 includes (a) an outwardly extending rod 2;
a body having a pin 19 received in a hole 20 of (
b) means provided on said body substantially at right angles to said pin 19 for attaching a lower crochet needle and for adjusting both the angular and vertical position of the crochet needle; Gashi sewing machine. (2) In the mechanism set forth in claim 1,
The clamp 18 has a hole substantially perpendicular to the pin 19, and a crochet needle attachment can be fixed inside the hole. (3) A mechanism according to claim 2, wherein the clamp is provided with a screw to secure the crochet needle in a preselected position. (4) An overlocking machine according to claim 1, wherein the crochet needle integral with the clamp is also adjustable in position around the pin 19 and fixed by means of a screw.