TWI627323B - Device for monitoring the schiffli thread on a large or small schiffli embroidery machine - Google Patents

Abstract

The device for supervising the presence of the sillifried fiber comprises a contact element (19) which can be pressed by the squirrel fiber (23) to a contact to be contacted, and by means of the object to be contacted The machine control system establishes a connection.

Description

Device for supervising the Sievery fiber on a large or small Schiffer embroidery machine

The subject matter of the present invention is a device for supervising the Wilhelm fibers on a large or small Schiffer embroidery machine.

Devices for supervising the threads on the embroidery machine, particularly the Silky embroidery machine, are disclosed in various embodiments. Such devices are also referred to as disconnection monitoring devices. Today, the supervision of the needle thread on the Schiffer embroidery machine is a standard solution because the needle side above the front side of the eye plate is a device for supervising the line moved by the large reel. Large spaces, and thus mechanical or electromechanical detectors constructed in almost any way are found in the market.

For a number of reasons, it is difficult to supervise the Sieffer fiber that passes through the loop of the needle thread on the back or reverse side of the needle eye through the guide of the Schiffer. In particular, the designer basically does not provide free space to arrange the relevant reliable device between the Schiffry shuttle path and the eye plate. The available space at this location is reserved for the Schiffry Shuttle.

EP 1 013 814 discloses a solution for supervising Sifrey fibres by introducing electronic equipment in the area of the embroidery machine, wherein a number of arrangements are placed between the eye of the needle and the squirrel shuttle in the area of the safari shuttle rail. A sensor for monitoring the presence or absence of a backing line (i.e., the Sycamore fiber) in the area. The two sensors are arranged such that they face each other and the line to be supervised passes between the two elements without contact. According to one embodiment, it is proposed that when a beam runs through the line, reflections are made on a mirror surface. The disadvantages of this type of device are due to the fact that the Scree fiber under the needle plate In the region, multiple rubbing of the upper and lower threads causes inevitable fluff which, in a short time, covers the optical system, ie the mirror or the source of the beam, and disables the optical system. Reliable results may no longer be obtained due to the presence of deposits on the sensor elements. Another disadvantage is that the generally extremely thin Sievery fibers used herein are composed of materials that are difficult to optically capture or detect, such as in the case of white or transparent threads. Another disadvantage of this device is that even a miniaturized optical component requires a relatively large amount of space, and it is also necessary to power the optical components through a cable. In addition, such special miniaturized sensor components are extremely costly and require separate powering. If it is considered that there is a need to supervise hundreds or even thousands of Sidfried fibers on the Sifrey embroidery machine, it is almost impossible to achieve this economically.

Another device for supervising the Sievery fiber is disclosed in CH 448 699. In order to overcome the difficulty or difficulty of direct supervision of the Sifrifried shuttle or the spool between the bobbin and the needle to be embroidered, the case proposes to supervise the abutment of the Sifri shuttle on the lower drive rod. . The starting point of the scheme is: in the case of disconnection, since it is no longer wired, it will not brake the Xifeifusuo by wire drawing during the downward movement. Therefore, the Xifeifu shuttle will be placed in the lower drive in advance. Point on. In other words, compared to the case where the line was pulled during the downward movement of the Sirius and the brakes were braked, the Sifu was not used for line drawing or the line of the bobbin was exhausted. The shuttle shuttle makes contact with the lower drive finger in advance without braking. Therefore, the case indirectly determines the existence of the disconnection. However, due to the inevitable wear and tear, or the Scree's shuttle route and/or the Schiffer shuttle are contaminated, even if there is no disconnection, the Schiffry shuttle will be braked, so that it cannot be detected. line. Therefore, the solution cannot reliably identify the presence or absence of the line.

It is an object of the present invention to provide a device for supervising a Syfried fiber which does not have the disadvantages of the two conventional devices and in particular the ability to reliably inspect the presence of the Schiffer fiber.

The solution of the present invention for achieving the above object is a device, the device An advantageous design is given by the subsidiary.

The device can supervise the presence of the wire by directly supervising the thread eyelet on the Siffried shuttle and the eye of the needle eye or the thread tension between the needle to be embroidered in a thorough and reliable manner. The device does not stop working due to fluff or other impurities and is uniquely composed of an elongate or linear element that is placed transversely to the direction of the Sievery fiber and is transported online and the wire tensioned correctly. The sire fiber is extruded sideways. With this device, each stitch can be easily supervised, that is, each of the Sciffey fibers can be supervised, and the embroidery machine can be stopped if the thread is broken or the line is exhausted or the spool is empty, and the disconnection is eliminated. After the reason or after replacing the empty Swift Shuttle with the full Siffried Shuttle, continue the embroidery mode at the break point. The device is inexpensive to manufacture because only one electrical connection means, a thin wire, is required between the stylus and the control system of the device. In order to further reduce the manufacturing cost of the device, a plurality of styli pins may be integrated into a module such as a plurality of pins, and a broken line of any one of the modules may be reported to the control system through a unique electrical connection device. It is not necessary to provide electronic equipment on the pins for this purpose, and to report the disconnection to the control system by a current "on" or current "off" signal.

The device according to the invention has another advantage compared to conventional monitoring elements, since the device supervises itself. These styli are extremely thin springs that need to be subjected to millions of stitches and deflections under conditions of, for example, "700 stitch formation/minute", and are also at risk of fatigue fracture. If the stylus breaks down, the break will immediately trigger a fault message and the machine will be shut down or stopped. This eliminates the possibility that false stitches caused by broken wires cannot be detected because the self-monitoring system does not allow unchecked stitches.

1‧‧‧needle plate

3‧‧ ‧ frisky shuttle path

Surface of 3’‧‧3

5‧‧‧Intermediate board

7‧‧‧ screws

8‧‧‧Lower drive rod

9‧‧ ‧ frifried shuttle

10‧‧‧ sewing material

11‧‧‧ Notch

13‧‧‧ pinhole

15‧‧‧ Groove

17‧‧‧ gap

18‧‧‧Contacts

19‧‧‧Contact elements

Side of 19'‧‧19

Side of 19"‧‧19

21‧‧‧Line eyelet

22‧‧‧Needle or on-line loop

23‧‧‧Sieffey fiber

24‧‧・Needle or on-line

25‧‧‧Plug-in coupling device

Screws on 27‧‧‧25

Rod of 29‧‧27

Lower end of 31‧‧19

33‧‧‧ stitches

35‧‧‧ spool

37‧‧‧Clamps

1 is an exploded perspective view of the module shown in FIG. 2, and FIG. 2 is an exploded view of a module including four squirrel shuttle paths with a needle eye plate at the front, and FIG. 3 is for a horizontal needle plate. An exploded view of the path of the small embroidery machine 4 is an enlarged view of a portion A of FIG. 3, and FIG. 5 is a cross-sectional view VV of FIG. 3 parallel to the front of the stylus in the case where the elements of the Schiffer's shuttle path are joined together, the contact system is broken. And Figure 6 is a top view of the path of the Siffried Shuttle including the direction of the embroidery stitch and the direction of the line. For the sake of clarity, only the needle, the Schiffer and the sewing material are shown.

The invention is described in detail below by means of several illustrated embodiments.

The eyelet 1 on the large embroidery machine shown in Fig. 1 carries on its back the four Sifri shuttle path 3, also known as "Stöckli". Here, the needle plate 1 made of metal and used in one of the plurality of modules on the embroidery machine is provided, and the intermediate plate 5 is provided between the Schiffry and Shuttle paths 3 which are also made of metal. (Fig. 3), which consists of a material that is non-conductive but has good sliding properties. The Sciffey shuttle path 3 is fastened in a distance by means of a plurality of screws 7 passing through the eye plate 1 and the intermediate plate 5, which are placed against the intermediate plate 5. In the large embroidery machine, the Schiffer's shuttle path 3 is inclined by about 15° with respect to the vertical line, so that the Swift-flying shuttle 9 that slides on the path of the safari-floating shuttles leans against the weight by its bottom. On the smooth surface of the Frisbee path 3. Figure 1 shows the situation in which the Schiffer's shuttle is in the deepest position and abuts against the lower drive rod 8.

A plurality of recesses 11 are formed in the intermediate plate 5 in a manner adjacent to each of the Scribble shuttle paths 3, and thus in the corresponding position, i.e., in the cross-sectional area of the recess 11, the self-floating shuttle path Viewed from the side, the back or bottom of the eyelet 1 is visible. A needle eye 13 is provided in this visible region of the eyelet plate 1 so that the needle 33 shown in Fig. 6 passes through the needle eye plate 1 and the intermediate plate 5 and the groove in the surface 3' of the Schiffer's shuttle path 3 (needle guide) ) 15 passes through the path of the Frisie shuttle under the 9th. These notches are required as gaps for the Schiffer fiber 23 and the needle thread 24. As a result, the needle thread 24 does not pick up or twist at any position when it is passed by the Phillips shuttle 9.

Figure 2 also shows the bottom or inner side of the intermediate plate 5. Displayed in the bottom surface of the intermediate plate 5 A plurality of groove-like slits 17 are shown which can be inserted into the contact element 19, which is likewise formed by the spring wire, which is shown between the eyelet plate 1 and the intermediate plate 5 in FIG. Each of the contact elements 19 and the slit 17 that houses it are generally presented as one of the side-mounted "U" shapes. The upper side 19' (Figs. 1, 2, 5) of the contact element 19 leaves or projects beyond the slit 17 and traverses the recess 11 in the intermediate plate 5. Thus, the contact element 19 is situated in the cross section of the intermediate plate 5, ie between the top and bottom faces of the intermediate plate. The contact element 19 is preferably constructed of spring steel and is bent in such a way that when the eyelet 1 is joined to the intermediate plate 5 and the rear friday path 3 of the intermediate plate via the screw 7, the upper side 19' or Its end rests on the path of the Sciffey shuttle. Therefore, as shown in Figures 1, 2 and 6, when the Sweep shuttle 9 is guided downward to the initial position after the upper wire loop 22 passes, the upper side 19' of the contact member 19 is located at the Schiff In the moving path of the inner fiber 23, the moving path is guided from the eyelet 21 on the Phillips shuttle 9 to the eye 13 in the eyelet 1. The Sciffey fiber 23 is consumed during the formation of the stitching process, even in the least amount. In the case where the Schiffer shuttle 9 is returned to the initial position by the upper drive lever (drive lever not shown), the wire is pulled from the bobbin 35 located inside the Swift shuttle 9. During the drawing of the Syfried fiber 23, the wire 23 is slightly braked in the Schiffer shuttle 9 with a wire brake, thereby extending the thread 23 toward the eye 13 and holding it in place on the needle to be crocheted. The section in the middle is tight. In the region of the recess 11 in the intermediate plate 5, the tensioned wipes 23 are slightly deflected on the upper side 19' of the contact element 19. The force applied by the tensioned squirrel fiber 23 to the upper side 19' of the contact element 19 or the contact element 19 is sufficient to deflect the upper side 19' slightly, so that the end 19" of the upper side is self-contained The contact position of the surface of the metal wiper path 3 rises so that there is no longer an electrical contact. In the case of deflection of the transmission line 23, the side 19' of the contact element 19 causes a longer base of the U-shaped contact element 19. The deformation of the edge acts as a resilient element and is held in the gap 17 by a covering device 20 serving as an insulating means for the needle eye plate 1. With this arrangement, by simply inserting the slit 17, The covering means and a suitable film (not shown) are covered, and subsequently the eyelet 1 is joined to the intermediate plate 5 and the Sciffey shuttle path 3, and the contact elements 19 can be securely fixed. And pick up The end 31 of the contact element 19 opposite the end 19' of the contact element 19 is connected to the machine control system via a wire (wire not shown). In the event that the wire is broken or the Schiffer fiber 23 is exhausted, the electrical connection of the Schiffry Shuttle Path 3 to the machine control system is established. This electrical connection triggers a fault message and stops the machine. As an alternative, it is of course also possible to arrange the position of the side edge 19" of the contact element 19 in such a way that, in the case of a correct tensioning of the line of the Phillips fiber 23, the line 23 is transmitted through the line 23 so that the side 19' and the eyelet are The side is deflected in such a way that contact occurs. Therefore, in this case, the electrical connection of the eyelet 1 to the control system indicates error-free operation, and the interruption of the connection is a failure message that causes the machine to stop.

According to one of the devices shown in Figures 3-5, it is particularly suitable for a small embroidery machine comprising a horizontally arranged object to be embroidered, but can also be used in a design of a large embroidery machine, the contact element 19 being a linearly extending wire. It is preferably constituted by a spring wire or a metal strip serving as a contact element 19 which is fastened on the back side of the Schiffry-Flying path 3 and/or on the back side of the intermediate plate 5 and is elastically held.

The rear end of the contact element 19 is connected to the plug-in connection system 25. The function of the plug-in coupling device 25 (see Figs. 3 and 4) is to establish an electrically conductive connection through a wire for status forwarding to the control system of the embroidery machine.

The plug-in coupling device 25 shown in Figs. 3 and 4 is fastened by a screw 27 to which the rear end or the lower side of the contact member 19 is fastened. According to a preferred embodiment of the fastening device of the contact element 19, the fastening device partially encloses the stem 29 and is fixedly connected to the stem 29, for example welded. Alternatively, the contact element 19, preferably made of a spring wire, can also be wound around the shank 29 a plurality of times in order to wear the linear extension of the contact element 19 in a spring-elastic pretensioning manner. The notch 11 is held on the contact piece 18 in such a manner as to be electrically connected to the eye plate 1. The plug-in coupling device 25, which is fixedly connected to the stem 29, is also used to adjust the tension of the contact element 19 to adjust the sensitivity of the line monitor (Figs. 3 and 5). For this purpose, a snap-fit component comprising a plurality of different snap positions is formed on the plug-in coupling device 25 37.

Of course, in this embodiment, the contact element 19 can also be shaped in such a way that contact with the eyelet 1 occurs in the case of correct line tension, and in the absence of tension, the contact element 19 is spaced from the eyelet 1 The way to a certain distance is in the rest position and no contact is established.

As an alternative to the contact element 19 which is supported on one side in an elastic manner, it is also possible to use an embodiment (not shown) in which the contact element 19 is supported by the anti-gravity movement of the Schiffer fiber 23.

Therefore, the machine manufacturer is entrusted to choose whether to trigger a fault message through an existing contact or to trigger a missing contact.

Claims (9)

A device on an embroidery machine for supervising the presence and tension of a Frisian fiber (23) on each stitch, including a needle eye plate (1) disposed in the middle of the back surface of the eye plate (1) a plate (5), and a plurality of Siewe-Flying paths (3) fastened to the intermediate plate (5), a spring-elastically constructed contact element (19), and in the intermediate plate ( 5) a through-arranged recess (11), wherein the contact is between the eyelet (13) in the eyelet (1) and the eyelet (21) in the wiper (9) The element (19) extends in the recess (11) in such a way as to intersect the line of the Schiffer fiber (23), and can be deflected there by the Weiss fiber. The device of claim 1 is characterized in that the contact element (19) is in contact with a contact object in the case of incorrect fiber tensioning and/or fiber tensioning via fiber wear. And establishing an electrical connection to a machine control system or in the event of incorrect fiber tension, the contact element (19) is not in contact with the object to be contacted and interrupts the electrical connection to the machine control system. The device of claim 2, characterized in that the needle eye plate (1) or the safari shuttle path (3) serves as a contact to be contacted. The device of claim 2, characterized in that the contact element (19) comprises a curved wire or stylus which is held in such a manner as to be electrically insulated in a slot-like slit (17) in the intermediate plate. The side edge (19') of the contact element is deflectable relative to the wiper fiber. A device according to claim 4, characterized in that a recess (11) is formed in the intermediate plate (5), which is at least partially in this way by the side edge (19') of the contact element (19) Throughout, the side edge (19') is deflectable within the recess (11) relative to the wiper fiber (23). A device as claimed in claim 1, characterized in that the contact element (19) The end is fastened to a bolt or a screw (27) for applying a force to the contact element (19). The device according to claim 6 is characterized in that the screw (27) is connected to a plug-in coupling device (25) for establishing the contact element (19) and the machine control system Electrical connection. A device according to claim 1 is characterized in that a fault message is issued in the event of breakage or damage of the contact element (19) and the machine is stopped. A device according to claim 1, characterized in that one side of the contact element (19) is held in a spring-elastic manner, or one side of the contact element (19) is held in a rigid manner, but by a spring The elastic material is constructed, or the contact element (19) is held in a guiding device and is movable by gravity to be opposite to the force of the Sifley fiber (23) for connection with the object to be contacted.