DE3132155A1 - Accessory device for sewing machines - Google Patents

Abstract

The invention relates to an accessory device for making seams running parallel at equal or different distances, especially for domestic sewing machines. The aim of the invention is to provide a constructively simple accessory device which can be produced at a low manufacturing outlay and which is of versatile use. The object of the invention, to design this device in such a way that it can be fastened easily to the pressure bar and guarantees exact parallel and distance markings by means of only one feeder, was achieved in that the holding part is formed from a plastic workpiece which has a plurality of orifices and which, by utilising the natural elasticity of the material, can be fastened positively and non-positively to the pressure bar so as to be secured against rotation. The orifices serve for receiving the feeder on the right or left of the pressure foot or in front of or behind the latter. This combined seam-guiding and distance-marking device can be used in conjunction with any pressure foot. Furthermore the pressure-foot ranges having quick-change soles can also be equipped with this accessory device.

Description

Additional equipment for rowing machines

There are additional devices in the form of edges or

Known parallel guides that by means of a holding part on the fabric back rod or are attached to the presser foot. On the right side of the presser foot - seen from the point of view of the operator - there is a feeder in the holding part, which is made up of an axis and one arranged on it and sliding on the material to be sewn Assembled guide ruler. The lateral setting of the desired to be sewn Distances are done either by moving the guide ruler on the stationary Axis (DE-PS 818 305; DE - PS 1 049 677; DE - GM 72 20 958) or by pressing the adjustable axis mounted in the holding part, with the guide ruler on the right outer end of the axle - mostly resilient - is attached (DE - PS 927 252; DE - PS 10 17 010; DE - GM 69 07 533). - These solutions enable the guiding ruler to pivot into an inoperative position and to lock in this position.

All of these known guide devices have the disadvantage that the attachment of the holding part to the presser rod and the fixation the lateral distance is done using screws (except for DE - GM 69 07 533, in which the axis in the holding part is positively and non-positively locked in a plastic bushing to be led). In addition, these facilities have a multi-part, mostly quite complicated structure and are often only with an increased manufacturing effort manufacturable. Another disadvantage is that these facilities are exclusively single-purpose guides i.e. they are only to be found on the right edge of the presser foot. or adjustable stitching.

The invention specified in claim 1 is therefore based on the task To create an additional device that consists of a small number of simple components insists that this easy to attach to the presser bar and that the holding part consists of a material with high inherent elasticity.

The additional device according to the invention is with little Bertigungs- and material costs can be produced and is characterized by simple assembly and handling. This multipurpose facility is not attached to a special presser foot bound, i.e. it can not only be used in conjunction with an edging foot and can be used to produce seams parallel to the edge or with just one feeder. parallel quilted seams or as a distance marking device, for example for enopholes, can be used. In addition, the most common presser foot assortments on the world market can be equipped with this additional device with quickly exchangeable soles.

Another advantage is that by using these combined Seam guide and spacing markers ensure that the sewing material is transported properly and thus an even seam pattern is achieved. This facility is hiring essential aid for the sewing person.

Appropriate refinements of the subject matter according to claim 1 are described in the subclaims.

An exemplary embodiment of the invention is based on FIGS. 1 and 2 explained. It shows: FIG. 1 the additional device in the installed state. FIG. 2 the device according to the invention separately.

In Fig. 1 is the presser bar associated with the sewing machine, not designated 1 can be seen, at the lower end of the prism 2 of the presser foot 3 with a Fastening disk 4 is arranged. This is preferably made of polyamide or polyethylene injection molded retaining part 5 of the additional device according to the invention rests on the prism 2 and is prevented from rotating by means of the stop surface 6 secured around the presser bar 1. This holding part 5 has a corresponding the lower end of the presser bar 1 is formed semicircular mounting hole 8. In the holding part 5 are provided with slots 9 openings; 10 to accommodate the Axis 11 of the feeder 12 is provided (Fig. 2). The axis 11 and the openings 9 and 10 are advantageously square. As can be seen from Fig. 1 and 2, the feeder 12 formed from wire has a rounded bend 13, which ensures is that when it is pushed into the openings 9 (from the right or left) or 10 (from the front or the rear) is immediately functional. The handling of the invention Additional equipment happens as follows: The holding part 5 is against the sewing direction attached to the fabric backing rod 1 above the presser foot 3. this happens by overcoming the inherent elasticity of the holding part 5 until this with its fastening opening 8 noticeably clicks into place on the presser bar 1. - When a seam is parallel to one Edge or other seam on the right (left) of the presser foot 3 is to be executed, the axis 11 of the feeder 12 is from the right (left) inserted into opening 9 and set the appropriate distance. The investor 12 is slotted by the structural design of its axis 11 and the Openings 9 or 10 fixed positively and ksaftschlig in the set position.

The axis 11 of the feeder 12 can also be provided with a dimension division will.

To sew a buttonhole, the needle is inserted into the fabric and åe According to the sewing machine program, the button for which the buttonhole will be sewn should be placed against the needle from the front (from the back). The axis 11 of the feeder 12 will inserted from the front (from the rear) into the opening 10 so far, that the feeder 12 touches the button 0 This marks the buttonhole length and the sewing process can take place.

In addition, the feeder 12 can be adjusted in this working position the button spacing can be used when sewing on buttons.

When not in use, the feeder can be swiveled into an ineffective position will.

In a further opening 14 of the holding part 5, a can not here finger guard shown are inserted, which also, for example when threading the needle or when changing the presser foot 3, from its effective Location can be pivoted, so that the disabilities that a stationary attached Represents finger protection are eliminated.

A transport hindrance is especially when sewing thin fabrics excluded, since the round bend 13 of the feeder 12 has a distance of about 0.5 mm to the throat plate 7. When placing Näligut under the presser foot 3, the feeder 12 rises by the same amount as the presser foot 3; the Fabric can slide unhindered under the curved bend 13.

By fixing the position of the round bend 13 in the lateral extension the sole pivot axis 15 (i.e. the curve ends behind the toes of the presser foot 3 seen from the operator's point of view), the feeder 12 softens to the same extent above, like the presser foot 3 over the seam obstacle (cross seams, fabric reinforcements and the like) "climbs. A possible twisting of the boom 12 is due to the geometric shape of the axis 11 and the opening 9 excluded.

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Claims (5)

Patent set claims 1. Additional device for sewing machines with an the holding part that can be attached to the fabric backing rod and one that can be displaced transversely to the sewing direction as well as swivel-mounted feeders, d u r c h e k e n n -z e i c h n e t that the holding part (5) as a plurality of openings (9; 10; 14) having Plastic workpiece is formed, which is form-fitting and non-positive on the fabric presser rod (1) is fastened above the presser foot (3) and resting on it and a stop surface (6) for locking against rotation on the presser bar (1) has, further that the investor (12) has a round bend (13), which in Tube of the sole pivot axis (15) and ends in its lateral extension. 2. Additional equipment according to point 1, d a d u r c h g e -k e n n z e i c h n e t that the loading access opening (8) of the holding part (5) has a cross section corresponding to the lower end of the presser punch (1). 3. Additional equipment according to points 1 and 2, which are not applicable z e i c h n e t that the investor (12) by pushing its axis (11) into the Openings (9; 10) of the holding part (5) from the right or left and from the front as well can be brought into an effective position from behind. 4. Additional equipment according to point 1 to 3, which is not applicable z e i c h n e t that a finger guard can be inserted into the opening (14). 5. Additional equipment according to points 1 to 4, which are not applicable z e i c h n e t that the openings (9; 10; 14) are provided with slots.