JPS6260591A - Cloth pressure of cycle 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] [Object of the Invention] (Industrial Field of Application) The present invention relates to a cloth presser device for a cycle sewing machine, and in particular to a cloth presser device in which the working direction of a cloth holder is changed from a feed drive cam through a link mechanism or the like. Used for bar tacking machines such as

(Prior art) Traditionally, the presser foot of bar tacking sewing machines was manufactured using the
It was constructed as shown in the accompanying drawings of Specification No. 32.

That is, as shown in Figures 7 and 8, the presser foot is 15°15''.
is divided into left and right halves. When the cloth is clamped, the right and left cloth pressers 15.15'' can be operated independently by a presser spring 18 so that the cloth can be held securely even if the thickness of the cloth is different on the left and right sides.

In addition, in recent years, electronic bar-tack sewing machines have been developed, and when changing the feed pattern, there is a technology that allows you to easily change from horizontal bar-tack to vertical bar-tack using electronic control without replacing the feed cam. be.

(Problems to be Solved by the Invention) In the conventional two-piece presser foot described above, when performing vertical or horizontal bar tacking, a presser foot with a vertical or horizontal needle hole that matches each is used. need to be divided.

Further, even if the cloth feeding mechanism can be easily changed to vertical and horizontal feeding, the seven presser foot cannot be changed, so the presser foot must be replaced each time, which is cumbersome. .

In addition, even if the direction of the sewn product is changed, the direction of the cloth must be changed, which is a hassle.

In order to eliminate the above-mentioned conventional drawbacks, the present invention aims to improve a presser foot that can be changed to either horizontal bar tacking or vertical bar tacking with a one-touch operation.

[Structure of the invention]

(Means for solving problems) The presser foot device of the present invention comprises means having the following configuration.

(1) Separate left and right presser foot bodies that can be replaced and installed in the long grooves of the presser arm (a member to which a conventional presser foot is attached); (2) a longitudinal needle hole is formed in the center of each presser foot; (3) The left and right cloth presser pieces are separated into left and right parts at the opposing intermediate portions, and (3) the left and right cloth presser pieces are integrally rotatable approximately 90 degrees about the midpoint of the needle hole in plan view, and can be rotated up and down. They are connected by an elastic member so as to be able to move up and down independently in the direction, and are fitted into the race grooves of the left and right presser feet, respectively.

(4) The fitting of the left and right presser bodies and the respective presser pieces is held by the retainer plate. Further, the position of the needle hole of the presser foot piece can be displaced, held and fixed in a desired direction by the displacement fixing means which also serves as a part of the structure of the elastic-external member.

(Function) By rotating the displacement fixing means as desired, the left and right presser pieces are integrally displaced by 90 degrees with respect to the presser member into which they are fitted, as viewed in plan.

That is, the needle hole configuration is displaced from a vertical row to a horizontal row (or vice versa), takes a holding position of horizontal bar tacking or vertical bar tacking, and is held and fixed at that position. (See FIGS. 2 and 4) Furthermore, the left and right presser pieces are held separately by respective presser bodies, and the pressure of the elastic member acts independently in the vertical direction on each piece.

(Example) In FIGS. 1 to 6, reference numerals 1 and 2 denote cloth presser bodies, and the cloth pressers 1 and 2 are operated by a feed arm A (not shown) via a feed drive cam and a link mechanism (not shown). It has attachment parts 1a and 2a that fit into the guide part shown in FIG. 6).

On the lower surface in the direction of the presser foot, circular race grooves 1b and 2b are provided with the center of the needle hole as the center.

Reference numerals 3 and 4 denote cloth presser pieces, and the cloth presser pieces 3 and 4 are formed into a substantially circular shape centered on the center of the needle hole.

Longitudinal needle holes 3a and 4a are provided, respectively, and the cloth presser pieces 3 and 4 are separately disposed left and right in the opposing direction (perpendicular direction).

Reference numerals 5 and 6 denote leaf springs that connect the presser pieces 3 and 4 through tightening screws 7.8, and the plate springs 5 and 6 form a wave shape, and the presser pieces 3 and 4 are connected to each other independently. Even if it moves up and down, this can be tolerated.

Further, the presser foot piece 3.4 is connected to the race groove 1 of the presser foot bodies 1 and 2.
b, 2b are fitted with the convex portions 3b, 4b, and in a rotatable state, the holding plates 9.10. It is held with screws 1 and 11 degrees.

Reference numeral 6a denotes an operating portion formed at the extending end of one of the leaf springs 6, and this temporary spring 6 is provided with a notch 6b. IC
, IC'' are locking holes provided in the presser foot 1, and when the leaf spring 6 is rotated and engaged with the notch 6b, the presser foot pieces 3 and 4 are rotated integrally to their predetermined positions. Hold position.

Now, as shown in FIG. 6, the attachment parts 1a and 2a of the presser foot are fitted and attached to the presser attachment part of the presser arm A of the bar tack sewing machine. When performing horizontal bar tacking, the operating portion 6a is fixed at the second illustrated position. Also, when performing vertical bartack stitches, press the operating section 6a.
is rotated 90 degrees to the fourth illustrated position to change the needle hole position to the vertical direction.

Now, when the crotch fabric is clamped with this presser foot, the presser foot 1 or 2 moves up and down to securely clamp it, just like the conventional presser foot during horizontal bar tacking. Furthermore, even when performing vertical bar tacking, when the presser foot 1 or 2 moves up and down, the presser foot pieces 3 and 4 can also move up and down, so even the stepped portions of the fabric can be securely clamped.

That is, it is possible to easily switch between horizontal bar tacking and vertical bar tacking without having to replace the presser foot each time, and even when sewing in rows, the left and right presser feet can be moved up and down and perfectly clamped.

〔Effect of the invention〕

One possible way to compensate for the shortcomings of the prior art is to use a cross-shaped presser as shown in FIG.

According to this presser foot configuration, it can be used as is for both horizontal bar tacking and vertical bar tacking, but it is customary for the fabric to be stepped in most of the bar tacking areas. Therefore, this integrated presser foot cannot securely hold the fabric, especially when it is thick.
This has the disadvantage of causing poor seams. The presser foot of the present invention can be attached as is to a part of the presser arm holder of a conventional cycle sewing machine, and the needle hole can be easily changed from horizontal to vertical directions. Furthermore, both horizontally and vertically,
Since the cloth presser piece can act in a stepped manner, even thick crotch cloth can be reliably held.

In addition, since the presser foot body and the presser piece are fitted with each other at the lace surfaces and rotated, the thickness (height) of the presser foot portion can be made relatively small. This has the advantage that the lifting amount of the presser foot can be increased, and the operation of the wiper that removes the upper thread is not hindered.

Moreover, by exchanging only the presser foot pieces, large or small bartacking pieces can be used in common with - number of presser foot bodies, which has the secondary effect of reducing the cost of accessories.

[Brief explanation of drawings]

Fig. 1 is a side view of the presser foot device of the present invention, Fig. 2 is a plan view of Fig. 1, Fig. 3 is a sectional view taken along line B-C-D of Fig. Fig. 5 is a sectional view taken along the line E-F of Fig. 4, Fig. 6 is an overall view of the device of the present invention, and Fig. 7 is a diagram of the prior art. Fig. 8 is an explanatory diagram of GG in Fig. 7.
The enlarged view in the arrow direction and FIG. 9 are other conceptual views of the holding member. 1.2... Cloth presser body, 3, 4... Cloth presser piece, 5.6
...Temporary spring, 6a...Operation section, 9, 10-...Retainer plate Fig. 7

Claims (1)

[Claims] The left and right presser foot bodies have a nearly symmetrical shape with a mounting part that fits into the presser foot arm's mounting groove on one end and a mating race groove on the other side of the presser foot, and a needle hole in the center. It is made up of respective presser foot pieces that are separated left and right at the center, and an elastic member that connects the presser foot pieces, and the presser foot pieces are flat against the presser body with fitting race grooves. It is made to be able to rotate integrally around the midpoint of the needle hole, and vertical movement is allowed independently on the left and right together with the presser foot in the vertical direction, and the presser foot piece is held by a holding member and the presser foot piece can be moved to a desired position. A presser foot device for a cycle sewing machine, which is equipped with a means for moving the presser foot into position.