KR20020007159A - Bobbin taking-out apparatus for a two thread lock stitch sewing machine - Google Patents

Abstract

In the headquarters lock stitch sewing machine, it is very important to simply pull out the bobbin capsule 4 or bobbin 3 from the book 20 in order to increase productivity and operation convenience. The bobbin take-out apparatus according to the present invention can be taken out very simply and can be manufactured at low cost.

The bobbin take-out device according to the invention consists of a guide mechanism 6 in which a take-out member 5 is arranged. The withdrawal member 5 allows the bobbin 3 or bobbin capsule 4 to be separated from the drum 20 by magnetic force and then placed in a well visible and easily accessible position. The manual driving of the guide mechanism 6 and the coupling of the book covering 11 by the guide mechanism 6 provide additional cost and operational advantages.

Description

BOBBIN TAKING-OUT APPARATUS FOR A TWO THREAD LOCK STITCH SEWING MACHINE

The present invention relates to a bobbin take-out device for a two-head lock stitch sewing machine according to the preamble of claim 1.

Drawing devices corresponding to the preamble of claim 1 are already known or suggested in DE 198 40 956 and DE 198 40 953.

The withdrawal device disclosed in DE 198 40 956, for example, allows for simple withdrawal of bobbin capsules from the drum, unlike previously known drums. However, no means have been proposed to further simplify the withdrawal process.

Fully automatic bobbin capsule exchangers are known from US 4223618 and EP 0829565. Here the device removes the empty bobbin with the bobbin capsule from the bobbin housing and stores it in the magazine, and then the filled bobbin with the bobbin capsule is taken out of the magazine and inserted into the bobbin housing.

The bobbin capsule exchanger, known from US 5694874, withdraws a bobbin capsule with an almost empty bobbin from the drum, inserts a bobbin capsule with a filled bobbin into the drum and refills the empty bobbin during the stitching process.

The device and other similar devices, on the one hand, operate fully automatically and are designed for drums in which the bobbin capsules are supported by the bobbin housing. Therefore, the drawing device is relatively complicated.

The book according to DE 198 40 953 can be used for the fully automatic bobbin capsule changer, simplifying the mechanism. Nevertheless, productivity gains can only be achieved with expensive automatic sewing machines because of their high cost. Furthermore, the possibility to simplify manual bobbin capsule replacement is not presented.

In US 3125973 a device is known which alternately moves two drums to a sewing position. By means of a mechanical gripper the bobbin is withdrawn from the book not in the sewing position and then refilled and inserted into the book. Here, the bobbin is supported on the bobbin housing by a pivotable finger. In addition, the mechanism works automatically and is relatively expensive.

It is an object of the present invention to improve the bobbin withdrawal device according to the preamble of claim 1 so that simple manual withdrawal of the bobbin capsule or bobbin with the bobbin becomes possible and the bobbin takeout device can be manufactured inexpensively by simply constructing it.

This object is achieved by the features set forth in claim 1.

Advantages obtained by the present invention can be produced inexpensively, in particular by the bobbin take-out device according to the present invention consists of a small number of parts, connected to the sewing machine so that the withdrawal member is not lost, and does not require a special skill of the operator for bobbin withdrawal This has a positive effect on the convenience of operation, especially in household sewing machines and sewing machines with inaccessible drums, in which the bobbin lies within the operator's field of view and at the same time the finger is accessible, which greatly simplifies the withdrawal.

In addition, embodiments of the present invention provide the possibility of manual operation of the bobbin take-out device and allow a very simple configuration.

The formation of the take-out member into the permanent magnet and the combination of the guide mechanism and the book covering make the bobbin take-out device according to the present invention inexpensive, and the bobbin take-out device can be provided as an accessory of a sewing machine as well as a fixed component part. do.

In addition, the bobbin take-out apparatus can be preferably used for a sewing machine having two books, since the two bobbins can be taken out at about the same time. The bobbin take-out device according to the present invention can also be formed in various ways, so that the bobbin can be inserted into the book. This is especially important for sewing machines with inaccessible drums. The bobbin take-out device according to the invention can also be used for a sewing machine with different books, for example, a drum in a vertical axis, a drum in a rotating horizontal axis and a drum in a vibrating horizontal axis.

1 is a schematic front view of a drum rotating about a horizontal axis;

2 is a schematic side view of a first embodiment of the present invention with respect to a sewing machine.

3 is a schematic side view of a second embodiment of the present invention with respect to a sewing machine;

4 is a schematic side view of a third embodiment of the present invention with respect to a sewing machine.

FIG. 5 is a schematic plan view of the embodiment according to FIG. 2 viewed from the A direction, showing that the withdrawal member 5 is in the third position 15.

FIG. 6 is a schematic plan view similar to FIG. 5 with the extracting member 5 in a first position 13;

FIG. 7 is a schematic plan view similar to FIG. 5 with the extracting member 5 in the second position 14;

8 shows a schematic plan view in the direction B of the embodiment according to FIG. 3, showing that the withdrawal member 5 is in the third position 15.

FIG. 9 is a schematic plan view similar to FIG. 8 with the extracting member 5 in the first position 13;

FIG. 10 is a schematic plan view similar to FIG. 8 with the extracting member 5 in the second position 14;

FIG. 11 is a schematic plan view of the embodiment according to FIG. 4 seen in the C direction, showing that the withdrawal member 5 is in the first position 13.

FIG. 12 is a schematic plan view similar to FIG. 11 with the extracting member 5 in the second position 14;

* Description of the symbols for the main parts of the drawings *

1: book body

2: bobbin housing

3: bobbin

4: bobbin capsule

5: withdrawal member

6: guidance mechanism

11: book covering

Hereinafter, three embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a front view of a rotating two head lock stitch book 20 of a sewing machine 17, the function of which is well known to those skilled in the art. The book body 1 is fixed on the book shaft 18 supported horizontally. The bobbin housing 2 is rotatably supported by the book main body 1. The frictional follower of the bobbin housing 2 by the book body 1 is prevented by the support fingers 16. The bobbin housing 4 is inserted into the bobbin housing 2 with the bobbin 3 receiving the lower seal, so that the bobbin housing 2 and the bobbin capsule 4 cannot be rotated relative to each other, as is known. The capsule 4 is non-proactively supported by the bobbin housing 2.

2 shows a first embodiment of the invention for a sewing machine 17. The book shaft 18 is here arranged parallel to the conveying direction of the sewing feeling and the sewing machine 17 is arranged on the work table 19. The book covering 11 prevents access to the book 20, which is mainly required during sewing.

FIG. 5 shows a schematic plan view in the direction A of the embodiment according to FIG. 2. A part of the guide mechanism 6 is formed of the book covering 11. Since the drawing member 5 is a permanent magnet placed in the third position 15 in FIG. 5, the sewing process is not disturbed. When the person who sews tries to withdraw the bobbin capsule 4, the drawing member 5 is pushed by the guide mechanism 6 in the axial direction of the book 20 against the book shaft 18 so that the takeout member 5 is shown in FIG. 6. Position 13 is reached. The person who sews thus draws out the guiding mechanism 6 from the book 20, and the withdrawing member 5 together with the bobbin capsule 4 with the bobbin 3 supported by magnetic force is shown in FIG. 7. Move to position 14 In this position, the stitcher can easily insert the bobbin capsule 4 with the bobbin 3 with the bobbin 3 with the bobbin 3 and with the bobbin 3 filled into the drum 20 together with the bobbin 3. have. The sewing person then pushes the guiding mechanism 6 back to the position shown in FIG. 5. Now that the book 20 is covered, the sewing process can be started anew. If the stitcher tries to inspect the book 20 only without withdrawing the bobbin capsule 4, the guiding mechanism 6 is moved directly from the third position 15 shown in FIG. 5 to the second position of FIG. Let's do it. Then, the book 20 can be freely accessed.

3 shows a second embodiment of the invention with respect to the same sewing machine 17 as shown in FIG. 2. In this figure, the book covering 11 is pivotally connected to the sewing machine 17. The book covering 11 is provided with a pivotable guide mechanism 6 having a permanent magnet 5. When this book covering 11 is closed as shown in FIG. 8, the guide mechanism 6 is supported by the spring 21 so that the withdrawal member 5 is in the third position 15. For withdrawal of the bobbin capsule 4, when the sewing person first presses the guide mechanism 6 in the direction of the drum 20, the withdrawal member 5 reaches the first position as shown in FIG. 9. Thereafter, the stitcher pivots the book covering 11 to the open position as shown in FIG. Accordingly, the bobbin capsule 4 which is non-proliferatively supported by the guide mechanism 6 and the permanent magnet installed in the book covering 11 is displaced to the second position 14, so that the bobbin capsule 4 is simply the permanent magnet ( 5) separated from.

4 shows a third embodiment of the invention with respect to a sewing machine 17. The book shaft 18 is disposed perpendicular to the conveying direction of the sewing feeling, and the sewing machine 17 is disposed in the work table 19. The guiding mechanism 6 comprises a pneumatic cylinder 7. 4 and 12 a guiding mechanism 6 with a permanent magnet 5 is shown in the second position 14. To clearly show the bobbin capsule 4 in this position, the workbench 19 is provided with a cutout 22 that can be removed for confirmation of the placement relationship. If the bobbin capsule 4 is to be withdrawn from the book 20, the guide mechanism 6 moves to the first position 13 shown in FIG. 11 and then to the second position 14. In this position the bobbin capsule 4 is easily visible and can be manually withdrawn from the permanent magnet 5.

According to the present invention, a bobbin withdrawal device having a simple structure capable of simply and manually taking out a bobbin capsule including bobbin can be manufactured at low cost.

Claims (10)

A bobbin housing 2 including a drum main body 1 and a drawing member 5, wherein a bobbin housing 2 is rotatably inserted into the drum main body 1, and the bobbin housing 2 includes a bobbin 3 for receiving a lower seal; ) Is inserted, the bobbin 3 is at least partly made of a ferromagnetic material, and the bobbin 3 is non-proliferatively supported in the axial direction of the bobbin housing 2, or of the bobbin housing 2 It is inserted into a bobbin capsule 4 which is axially non-proliferatively supported, wherein the draw-out member 5 is at least partially made of ferromagnetic material and can contact the bobbin capsule 4 or the bobbin 3, and Between the bobbin 3 and the withdrawal member 5, or the bobbin, in order to withdraw the bobbin 3 or the bobbin capsule 4 including the bobbin 3 from the bobbin housing 2 in the same state. Magnetic attraction between the bobbin capsule (4), including (3), and the draw-out member (5) In the bobbin housing (2) and the bobbin (3) between the, or the bobbin housing 2 and the bobbin capsule (4) are configured two-axis larger than the head office direction holding force between the lock stitch sewing machine bobbin take-off for, A first position in which the extraction member 5 is coupled to the movable guide mechanism 6 such that the extraction member 5 contacts the bobbin capsule 4 or the bobbin 3 inserted in the bobbin housing 2. The bobbin capsule 4 together with the bobbin capsule 4, or together with the bobbin 3, which can be moved to (13) and which the pull-out member 5 is non-proactively supported. Or the bobbin 3 can be moved to a second position 14 in which the bobbin 3 can be seen and easily accessed, and thus the bobbin capsule 4 including the bobbin 3 or the bobbin 3 through the withdrawal member 5. The bobbin take-out device characterized by the simple manual withdrawal. 2. The bobbin withdrawal device according to claim 1, wherein the guiding mechanism is movable manually. 6. The bobbin withdrawing device according to claim 1, wherein the guide mechanism (6) is movable by one or more actuator members (7). 4. The drawing member (5) according to one or more of the preceding claims, wherein the drawing member (5) can move to a third position (15), in which the drawing member (5) carries out the sewing process and handling of the sewing feeling. Bobbin take-out device characterized in that it does not interfere. The bobbin withdrawing device according to claim 4, wherein a book covering (11) is coupled to the guide mechanism (6). 5. The bobbin take-out device according to claim 4, wherein the guide mechanism is formed for use as a book covering (11) at least in the third position (15) of the take-out member (5). 5. The book covering (11) according to claim 4, wherein the guide mechanism (5) is movably supported so that the second position (14) of the take-out member (5) can be reached by withdrawing the book covering (11). Bobbin take-out device, characterized in that arranged in). 8. The book covering 11 and the guide mechanism 6, optionally after removal of the book covering 11, or in order to access the book 20 selectively. At the same time as the removal of the covering 11, the bobbin capsule 4 including the bobbin 3, or the bobbin 3 together with the bobbin 3, can be formed, arranged and moved so that the extraction member 5 can move. Bobbin take-out device characterized in that. 9. A bobbin withdrawing device according to one or more of the preceding claims, characterized in that the drawing member (5) has the properties of a permanent magnet. 9. A bobbin withdrawing device according to one or more of the preceding claims, characterized in that the drawing member (5) has the properties of an electromagnet.