EP1584726B1 - Sewing machine with an oil tank and plunger for the oil tank of this sewing machine - Google Patents

Sewing machine with an oil tank and plunger for the oil tank of this sewing machine Download PDF

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Publication number
EP1584726B1
EP1584726B1 EP05007235A EP05007235A EP1584726B1 EP 1584726 B1 EP1584726 B1 EP 1584726B1 EP 05007235 A EP05007235 A EP 05007235A EP 05007235 A EP05007235 A EP 05007235A EP 1584726 B1 EP1584726 B1 EP 1584726B1
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EP
European Patent Office
Prior art keywords
sewing machine
light
immersion body
oil
machine according
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Application number
EP05007235A
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German (de)
French (fr)
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EP1584726A1 (en
Inventor
Andreas Riffel
Christoph Heckner
Jens Watermann
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Duerkopp Adler AG
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Duerkopp Adler AG
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Publication of EP1584726A1 publication Critical patent/EP1584726A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/008—Holders comprising finger grips
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B71/00—Lubricating or cooling devices

Definitions

  • the invention relates to a sewing machine with an oil container according to the preamble of claim 1. Furthermore, the invention relates to a submersible body for the oil container of a sewing machine according to claim 14.
  • Sewing machines contain a number of bearings that need to be supplied with a lubricant, especially oil.
  • sewing machines have at least one oil tank, which is connected via lines to the lubrication points.
  • lines are usually wick lines, so wicks that are retracted into a tube, used as such lines ensure a smooth, slow flow of oil and can also transport not only in the direction of fall, but also over limited distances up oil. It is naturally essential that always sufficient oil must be present in the oil tank.
  • the monitoring of the level of the oil tank is associated with some effort, since the one or more oil tanks are usually integrated into the interior of the sewing machine housing. It is therefore usually necessary to open the housing or corresponding housing parts from time to time and to check the oil level.
  • Oil level indicator for sewing machines are also known from the DE 29 37 722 B1 and the DE 29 23 750 A1 ,
  • the invention is based on the consideration that a light beam which impinges on the reflection surface of the immersion body, through the reflection surface into the oil enters, as long as the reflection surface is wetted by oil, however, is reflected when the oil level has dropped so far that the Reflection surface is no longer lapped by oil.
  • the light beam is reflected by the reflecting surface, and it can be picked up by a light receiver, for example a light-sensitive diode, and thus trigger a switching pulse for an optical or acoustic warning signal.
  • Translucent is the material of the immersion body, if it is for light of a given wavelength, namely the wavelength of the light beam emitted by the light source, is transparent.
  • the immersion body can, for. B. be a hollow body with bottom portion of transparent material or a total of permeable material existing body in which the outer surfaces form the reflection surfaces.
  • the immersion body is inserted vertically from above into the oil container, and the reflection surface is located in the lower region of the substantially rod-shaped immersion body.
  • a reflection surface which is designed as a flat surface of a translucent bottom region of the immersion body, can be easily manufactured while providing sufficient reflection properties.
  • the light source and the light receiver are preferably arranged close to each other in the upper region of the immersion body, so that they can be arranged on a common plate with a common electrical connection.
  • the immersion body is inserted from above into the oil reservoir and the light source and the light receiver are in the upper region of the immersion body, it should also be emphasized at this point, that the direction from which the immersion body enters the oil reservoir is not essential to the effect of the invention.
  • the use of the term "aboveā€ is done so far for reasons of linguistic simplification.
  • the immersion body can therefore also enter from the side or from below into the oil tank.
  • the light source and the light receiver are preferably in the furthest or the lower position of the immersion body.
  • Recesses for the light source and the light receiver in the upper region of the immersion body lead to an advantageously compact design for oil level monitoring.
  • the reflecting surface is, in particular, an outer surface of the immersion body which has the said partially reflecting properties, that is to say as long as the immersion body dips into oil, allows the light beam to escape into the oil, but has a reflective effect in the absence of oil. What is meant is at least a change in the reflection properties within oil on the one hand and within air on the other hand. Such a reflection behavior can be achieved for example with a prismatic immersion body made of glass or synthetic resin.
  • the light source such as a light emitting diode
  • the light receiver for example, also a photosensitive switching diode
  • the light source can be arranged side by side in the upper region of the immersion body in corresponding recesses.
  • the light source and the light receiver can be arranged on a common carrier plate which is mounted on the upper end of the immersion body, for. B. is latched that immerse the two diodes in the recesses of the immersion body.
  • the immersion body with the light source and the light receiver can be integrated as a coherent unit in an upper lid of the oil reservoir.
  • the light receiver preferably controls a visible from the outside warning light which lights up when light reaches the light receiver, so the level of the oil has dropped so far that the reflection surface or reflecting surfaces are exposed.
  • the warning light can also be integrated into the immersion body, and in particular also be mounted on its support plate and be received in the immersion body in a corresponding recess.
  • the warning light can also be associated with a reflection surface, by which the light of the warning light is deflected into an externally visible position.
  • diodes are suitable for the light source, the light receiver and the warning light.
  • Such components are available at low cost.
  • the wavelength of the light source and the warning light or the sensitivity of the light receiver can be selected from a variety of standard diodes so that they are adapted to the requirements of the sewing machine according to the invention, in particular to the submerged material to be penetrated by the emitted light.
  • An embodiment of the immersion body according to claim 13 is particularly compact.
  • a sewing machine has the oil container in a vertical stand of a housing, and he is here behind a viewing window, through which the warning signal can be seen from the outside. It is therefore easily visible from the outside that oil is missing when the warning light is lit. It is not necessary to check the oil level in a tight sequence as a precautionary measure.
  • Another object of the invention is to provide an immersion body for the oil reservoir specify a sewing machine with which a retrofittable oil level monitoring unit can be created.
  • the immersion body according to the invention also the oil reservoir of existing sewing machines can be retrofitted with little effort. Otherwise, the advantages of the immersion body correspond to those which have already been explained above in connection with the sewing machine according to the invention.
  • Fig. 1 is a schematic side view of a sewing machine with a housing-shaped base plate 10, a vertically upstanding from this stand 12 and an outgoing from the upper end of the stator 12, parallel to the base plate 10 running horizontal arm 14.
  • the arm 14 is in a conventional manner in Fig. 1 stored not visible driven arm shaft, via which a schematically indicated needle bar 15 with a needle up and down is driven.
  • first oil reservoir 16 In the stator 12 is a first oil reservoir 16, which will be discussed in more detail in the course of the description.
  • a second oil tank 18 is disposed in the housing 10.
  • the first oil tank 16 supplies via a wick line 20 and a distributor 22 and a further wick line 24 a not shown in detail range of the needle guide.
  • the first oil reservoir 16 supplies the second oil reservoir 18 with oil, which in turn is connected to a yarn gripper 30 via a further wick line 28.
  • a lower portion of the base plate 10 receives an oil pan 32, which serves to catch dripping oil. This oil is pumped back to the manifold 22 via a conduit 34 in which there is a pump 36 driven by a motor 38. Further details of the sewing machine in its entirety are not relevant in the present context.
  • the oil tank 16 has a box-shaped housing 40, the shape of which is adapted in some detail to the local space conditions, such as Fig. 3 shows.
  • the oil tank 16 is fitted in a recess 42 of a housing wall 44 of the stand 12 of the sewing machine.
  • the housing 40 is closed by a cover 46, in particular in Fig. 2 and 4 can be seen.
  • the lid 46 has an elevated, tray-shaped rising portion 48 and a deeper, substantially plate-shaped portion 50.
  • In the plate-shaped region 50 are initially two openings 52, 54, which merge at an underside of the plate-shaped portion 50 in tubes 56, 58.
  • a submersible body 60 is attached to the underside of the plate-shaped portion 50 of the lid 46, in particular integrally formed on the lid 46 as a continuous plastic part.
  • the immersion body 60 protrudes into a reservoir volume 61 of the oil reservoir 16.
  • three openings 62, 64, 66 arranged in a triangle are located in the plate-shaped area 50, which openings are in corresponding recesses 68, 70, 72 in the upper area of the Pass on the immersion body 60.
  • Two of the recesses 68, 70 which are aligned with the openings 62, 64 are in Fig. 6 shown.
  • the third recess 72 which is aligned with the third opening 66, is in Fig. 5 recognizable.
  • a support plate 74 is placed in the region of the immersion body 60, in particular by means of a latch 46 formed on the cover 46 latched.
  • On the support plate 74 are at the three recesses 68, 70, 72 associated positions a light emitting diode 78 as a light source, a light receiving diode 80, ie a photodiode, and a further light-emitting diode 82 is arranged.
  • the light-receiving diode 80 and the further light-emitting diode 82 are in signal connection with one another.
  • the further light-emitting diode 82 serves as a warning light which can be switched on and off by the light-receiving diode 80.
  • FIGS. 5 and 6 show two mutually perpendicular sections through the plunger 60 along the lines VV and VI-VI in Fig. 3 , In the in Fig. 6 In the section shown, the light-emitting diode 78 and the light-receiving diode 80 are shown. The cut according to Fig. 5 shows the warning light 82.
  • a lower bottom of the immersion body 60 has two mutually opposing inclined surfaces of about 45 Ā°, which are referred to as reflecting surfaces 84, 86.
  • a light beam 88 emitted by the light-emitting diode 78 impinges on the first reflection surface 84.
  • the jet passes essentially straight through the reflection surface 84 into the oil bath, as indicated by a dot-dash line is indicated.
  • the light beam 88 is deflected over the two reflection surfaces 84, 86 so that it is reflected back parallel to the light-receiving diode 80. This outputs a switching pulse, over which the Warning light 82 is turned on, so that it emits a light signal.
  • FIGS. 2 and 3 Wall 90 shown on the right side of the housing 40 embedded in the recess 42 of the housing wall 44 of the sewing machine. This results in a window 92 ( Fig. 1 ), through which the oil reservoir 16 is visible from the outside. Since the recess 42 is not dimensioned so that the warning light 82 would be visible directly from the outside, the light beam of the warning light 82 is passed through a projection 94 of the immersion body 60 and arranged at 45 Ā° lower reflection surface 96 of the approach and here by 90 Ā° out of the immersion body 60 and out through the window 92 to the outside. This means that the signal of the light-emitting diode 78 is relatively far visible at a prominent location on the outside of the sewing machine, so that the staff is informed of the lack of oil.
  • a line 98 is shown which is already in Fig. 1 was recognizable and establishes a connection between the diodes 78 to 82 and a supply electronics 100.
  • a compact oil level monitoring unit which can be used, for example, as a replacement part in conjunction with a conventional oil tank.
  • the lid 46 with the immersion body 60 can be injected as a coherent unit. Electrical connections are only necessary up to the support plate 74 on the upper side of the immersion body 60.
  • the oil bath itself contains no moving parts and no electrical or electronic lines.
  • the entry of the immersion body 60 from above, from the side or from below into the oil tank 16 is irrelevant. It is only important that the immersion body 60 has an area that is temporarily in full oil reservoir 16 in the oil and is released at increasingly empty oil tank 16.
  • a lack of oil gauge or an oil level monitoring unit according to the present invention may also be provided on the second oil tank 18 located in the base plate 10 of the machine, such as the oil tank 16 of the described embodiment.
  • a filling level monitoring according to the invention for the upper oil tank 16 is particularly advantageous when it is connected to the lower oil tank 18 in the manner of the described embodiment.
  • the lower oil tank 18 is connected via the line 26 to the upper tank, and a non-designated non-return valve prevents the overflow of the lower oil tank 18. That means that the lower oil tank 18 is always in the properly filled state, as long as a significant amount of oil in upper oil reservoir 16 is located.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

The lubrication system, for at least one lubricating point at a sewing machine, has a body (60) immersed in the oil container. The base of the body is of a light-permeable material with at least one reflection surface (84,86). A lamp (78) delivers a light beam downwards to the reflection surfaces, for the reflected light to be registered by an upper light receiver (80). The receiver generates a switch pulse when light strikes it to illuminate a warning lamp on a common carrier plate (74).

Description

Die Erfindung betrifft eine NƤhmaschine mit einem ƖlbehƤlter nach dem Oberbegriff des Anspruchs 1. Ferner betrifft die Erfindung einen Tauchkƶrper fĆ¼r den ƖlbehƤlter einer NƤhmaschine nach dem Anspruch 14.The invention relates to a sewing machine with an oil container according to the preamble of claim 1. Furthermore, the invention relates to a submersible body for the oil container of a sewing machine according to claim 14.

NƤhmaschinen enthalten eine Anzahl von Lagern, die mit einem Schmierstoff, insbesondere Ɩl versorgt werden mĆ¼ssen. Zu diesem Zweck weisen NƤhmaschinen zumindest einen ƖlbehƤlter auf, der Ć¼ber Leitungen mit den Schmierstellen verbunden ist. Als Leitungen werden zumeist Dochtleitungen, also Dochte, die in einen Schlauch eingezogen sind, verwendet, da derartige Leitungen einen gleichmƤƟigen, langsamen Ɩlfluss gewƤhrleisten und im Ć¼brigen auch nicht nur in Fallrichtung, sondern auch Ć¼ber begrenzte Strecken aufwƤrts Ɩl transportieren kƶnnen. Dabei ist es naturgemƤƟ wesentlich, dass in dem ƖlbehƤlter stets ausreichend Ɩl vorhanden sein muss. Die Ɯberwachung des FĆ¼llstands des ƖlbehƤlters ist jedoch mit einigem Aufwand verbunden, da der oder die ƖlbehƤlter in der Regel in das Innere des NƤhmaschinengehƤuses integriert sind. Es ist also zumeist notwendig, das GehƤuse oder entsprechende GehƤuseteile von Zeit zu Zeit zu ƶffnen und den Ɩlstand zu Ć¼berprĆ¼fen.Sewing machines contain a number of bearings that need to be supplied with a lubricant, especially oil. For this purpose, sewing machines have at least one oil tank, which is connected via lines to the lubrication points. As lines are usually wick lines, so wicks that are retracted into a tube, used as such lines ensure a smooth, slow flow of oil and can also transport not only in the direction of fall, but also over limited distances up oil. It is naturally essential that always sufficient oil must be present in the oil tank. However, the monitoring of the level of the oil tank is associated with some effort, since the one or more oil tanks are usually integrated into the interior of the sewing machine housing. It is therefore usually necessary to open the housing or corresponding housing parts from time to time and to check the oil level.

Es ist, z. B. aus der US 2 301 460 A , bekannt, bei ƖlbehƤltern, die sich oberhalb der Grundplatte befinden, also im StƤnder oder im Arm angeordnet sind, SichtglƤser im MaschinengehƤuse vorzusehen, die eine ƜberprĆ¼fung des Ɩlstandes ohne Demontage des GehƤuses ermƶglichen. Durch diese SichtglƤser ist aber der Ɩlstand der ƖlbehƤlter nur sehr schwer zu erkennen, so dass ein Ɩlmangel oft Ć¼ber lƤngere Zeit unbemerkt bleibt.It is Z. B. from the US 2 301 460 A , known in oil containers, which are located above the base plate, that are arranged in the stand or in the arm to provide viewing glasses in the machine housing, which allow a check of the oil level without disassembly of the housing. Through these sight glasses but the oil level of the oil tank is very difficult to see, so that a lack of oil often goes unnoticed for a long time.

Da aber die NƤhmaschinen in einer NƤherei nicht immer die gleichen Ɩlmengen verbrauchen, ist es aus SicherheitsgrĆ¼nden notwendig, die NachprĆ¼fung des Ɩlstandes zu einem mƶglichst frĆ¼hen Zeitpunkt vorzunehmen. Es ergibt sich also einiger Aufwand, wenn ein auftretender Ɩlmangel an einzelnen Maschinen und damit eine mƶgliche BeschƤdigung dieser Maschinen zuverlƤssig vermieden werden soll.However, since the sewing machines in a sewing shop do not always consume the same quantities of oil, it is necessary for safety reasons to carry out the checking of the oil level at the earliest possible point in time. It therefore results in some effort when an occurring oil shortage of individual machines and thus a possible damage to these machines should be reliably avoided.

Ɩlstandsanzeiger fĆ¼r NƤhmaschinen sind ferner bekannt aus der DE 29 37 722 B1 und der DE 29 23 750 A1 .Oil level indicator for sewing machines are also known from the DE 29 37 722 B1 and the DE 29 23 750 A1 ,

Es ist daher eine Aufgabe der vorliegenden Erfindung, eine NƤhmaschine der eingangs genannten Art derart weiterzubilden, dass eine zuverlƤssig wirkende, einfach aufgebaute, gegebenenfalls auch nachrĆ¼stbare Ɩlstands-Ɯberwachung gegeben ist.It is therefore an object of the present invention, a sewing machine of the type mentioned in such a way that a reliable acting, simple design, possibly also be retrofitted oil level monitoring is given.

Diese Aufgabe ist erfindungsgemƤƟ gelƶst durch eine NƤhmaschine mit den im Kennzeichnungsteil des Anspruchs 1 angegebenen Merkmalen.This object is achieved by a sewing machine with the features specified in the characterizing part of claim 1.

Die Erfindung basiert auf der Ɯberlegung, dass ein Lichtstrahl, der auf die ReflexionsflƤche des Tauchkƶrpers auftrifft, durch die ReflexionsflƤche hindurch in das Ɩl eintritt, solange die ReflexionsflƤche von Ɩl benetzt ist, dagegen reflektiert wird, wenn der Ɩlstand so weit abgesunken ist, dass die ReflexionsflƤche nicht mehr von Ɩl umspĆ¼lt ist. Im letzteren Fall wird der Lichtstrahl von der ReflexionsflƤche reflektiert, und er kann durch einen LichtempfƤnger, beispielsweise eine lichtempfindliche Diode aufgenommen werden und auf diese Weise einen Schaltimpuls fĆ¼r ein optisches oder akustisches Warnsignal auslƶsen. LichtdurchlƤssig ist das Material des Tauchkƶrpers dann, wenn es fĆ¼r Licht einer vorgegebenen WellenlƤnge, nƤmlich der WellenlƤnge des von der Lichtquelle ausgesandten Lichtstrahls, transparent ist. Der Tauchkƶrper kann z. B. ein Hohlkƶrper mit Bodenbereich aus durchsichtigem Material oder auch ein insgesamt aus durchlƤssigem Material bestehender Korpus sein, bei dem die AuƟenflƤchen die ReflexionsflƤchen bilden.The invention is based on the consideration that a light beam which impinges on the reflection surface of the immersion body, through the reflection surface into the oil enters, as long as the reflection surface is wetted by oil, however, is reflected when the oil level has dropped so far that the Reflection surface is no longer lapped by oil. In the latter case, the light beam is reflected by the reflecting surface, and it can be picked up by a light receiver, for example a light-sensitive diode, and thus trigger a switching pulse for an optical or acoustic warning signal. Translucent is the material of the immersion body, if it is for light of a given wavelength, namely the wavelength of the light beam emitted by the light source, is transparent. The immersion body can, for. B. be a hollow body with bottom portion of transparent material or a total of permeable material existing body in which the outer surfaces form the reflection surfaces.

Vorzugsweise wird der Tauchkƶrper senkrecht von oben in den ƖlbehƤlter eingesetzt, und die ReflexionsflƤche befindet sich im unteren Bereich des im wesentlichen stabfƶrmigen Tauchkƶrpers.Preferably, the immersion body is inserted vertically from above into the oil container, and the reflection surface is located in the lower region of the substantially rod-shaped immersion body.

Eine ReflexionsflƤche, die als ebene FlƤche eines lichtdurchlƤssigen Bodenbereichs des Tauchkƶrpers ausgefĆ¼hrt ist, lƤsst sich einfach fertigen und bietet gleichzeitig ausreichende Reflexionseigenschaften.A reflection surface, which is designed as a flat surface of a translucent bottom region of the immersion body, can be easily manufactured while providing sufficient reflection properties.

Die Lichtquelle und der LichtempfƤnger sind vorzugsweise nah beieinander im oberen Bereich des Tauchkƶrpers angeordnet, sodass sie auf einer gemeinsamen Platte mit gemeinsamem elektrischen Anschluss angeordnet werden kƶnnen. Soweit im vorliegenden Zusammenhang und insbesondere in Verbindung mit der spƤter erlƤuterten bevorzugten AusfĆ¼hrungsform davon gesprochen wird, dass der Tauchkƶrper von oben in den ƖlbehƤlter eingesetzt wird und die Lichtquelle sowie der LichtempfƤnger sich im oberen Bereich des Tauchkƶrpers befinden, soll auch an dieser Stelle betont werden, dass die Richtung, von der aus der Tauchkƶrper in den ƖlbehƤlter eintritt, fĆ¼r den Effekt der Erfindung nicht wesentlich ist. Die Verwendung des Begriffes "oben" geschieht insoweit aus GrĆ¼nden der sprachlichen Vereinfachung. Der Tauchkƶrper kann also durchaus auch von der Seite oder auch von unten in den ƖlbehƤlter eintreten. In diesem Fall befinden sich die Lichtquelle und der LichtempfƤnger bevorzugt in der am weitesten zurĆ¼ckliegenden oder der unten liegenden Position des Tauchkƶrpers.The light source and the light receiver are preferably arranged close to each other in the upper region of the immersion body, so that they can be arranged on a common plate with a common electrical connection. As far as is spoken in the present context, and in particular in connection with the preferred embodiment explained later, that the immersion body is inserted from above into the oil reservoir and the light source and the light receiver are in the upper region of the immersion body, it should also be emphasized at this point, that the direction from which the immersion body enters the oil reservoir is not essential to the effect of the invention. The use of the term "above" is done so far for reasons of linguistic simplification. The immersion body can therefore also enter from the side or from below into the oil tank. In this case, the light source and the light receiver are preferably in the furthest or the lower position of the immersion body.

Ausnehmungen fĆ¼r die Lichtquelle und den LichtempfƤnger im oberen Bereich des Tauchkƶrpers fĆ¼hren zu einer vorteilhaft kompakten Ausgestaltung zur Ɩlstands-Ɯberwachung.Recesses for the light source and the light receiver in the upper region of the immersion body lead to an advantageously compact design for oil level monitoring.

Bei der ReflexionsflƤche handelt es sich insbesondere um eine AuƟenflƤche des Tauchkƶrpers, die die genannten teilreflektierenden Eigenschaften aufweist, also, solange der Tauchkƶrper in Ɩl eintaucht, den Lichtstrahl in das Ɩl austreten lƤsst, bei Fehlen von Ɩl dagegen reflektierend wirkt. Gemeint ist also zumindest eine Ƅnderung der Reflexionseigenschaften innerhalb von Ɩl einerseits und innerhalb von Luft andererseits. Ein derartiges Reflexionsverhalten kann beispielsweise mit einem prismatischen Tauchkƶrper aus Glas oder Kunstharz erreicht werden.The reflecting surface is, in particular, an outer surface of the immersion body which has the said partially reflecting properties, that is to say as long as the immersion body dips into oil, allows the light beam to escape into the oil, but has a reflective effect in the absence of oil. What is meant is at least a change in the reflection properties within oil on the one hand and within air on the other hand. Such a reflection behavior can be achieved for example with a prismatic immersion body made of glass or synthetic resin.

Es kƶnnen auch zwei ReflexionsflƤchen vorgesehen sein, beispielsweise zwei entgegengesetzt schrƤg verlaufende FlƤchen, insbesondere entgegengesetzt um 45Ā° geneigte FlƤchen vorgesehen sein, deren erste den Strahl auf die zweite und deren zweite den Strahl parallel zurĆ¼ckreflektiert. Auf diese Weise kƶnnen die Lichtquelle, etwa eine Leuchtdiode, und der LichtempfƤnger, beispielsweise ebenfalls eine lichtempfindliche Schaltdiode, nebeneinander im oberen Bereich des Tauchkƶrpers in entsprechenden Ausnehmungen angeordnet sein.It can also be provided two reflection surfaces, for example, two oppositely inclined surfaces, in particular oppositely provided by 45 Ā° inclined surfaces, the first of which reflects the beam back to the second and the second the beam. In this way, the light source, such as a light emitting diode, and the light receiver, for example, also a photosensitive switching diode, can be arranged side by side in the upper region of the immersion body in corresponding recesses.

Die Lichtquelle und der LichtempfƤnger kƶnnen auf einer gemeinsamen TrƤgerplatte angeordnet sein, die derart auf dem oberen Ende des Tauchkƶrpers angebracht, z. B. verrastet wird, dass die beiden Dioden in die Ausnehmungen des Tauchkƶrpers eintauchen. Der Tauchkƶrper mit der Lichtquelle und dem LichtempfƤnger kƶnnen als zusammenhƤngende Einheit in einen oberen Deckel des ƖlbehƤlters integriert sein.The light source and the light receiver can be arranged on a common carrier plate which is mounted on the upper end of the immersion body, for. B. is latched that immerse the two diodes in the recesses of the immersion body. The immersion body with the light source and the light receiver can be integrated as a coherent unit in an upper lid of the oil reservoir.

Der LichtempfƤnger steuert vorzugsweise eine von auƟen sichtbare Warnleuchte, die aufleuchtet, wenn an den LichtempfƤnger Licht gelangt, also der FĆ¼llstand des Ɩls so weit abgesunken ist, dass die ReflexionsflƤche oder ReflexionsflƤchen freiliegen. Die Warnleuchte kann ebenfalls in den Tauchkƶrper integriert sein, und insbesondere auch auf dessen TrƤgerplatte angebracht sein und in den Tauchkƶrper in einer entsprechenden Ausnehmung aufgenommen werden. Der Warnleuchte kann ebenfalls eine ReflexionsflƤche zugeordnet sein, durch die das Licht der Warnleuchte in eine von auƟen sichtbare Position umgelenkt wird.The light receiver preferably controls a visible from the outside warning light which lights up when light reaches the light receiver, so the level of the oil has dropped so far that the reflection surface or reflecting surfaces are exposed. The warning light can also be integrated into the immersion body, and in particular also be mounted on its support plate and be received in the immersion body in a corresponding recess. The warning light can also be associated with a reflection surface, by which the light of the warning light is deflected into an externally visible position.

FĆ¼r die Lichtquelle, den LichtempfƤnger und die Warnleuchte eignen sich insbesondere Dioden. Derartige Bauelemente sind kostengĆ¼nstig verfĆ¼gbar. Die WellenlƤnge der Lichtquelle und der Warnleuchte bzw. die SensitivitƤt des LichtempfƤngers lassen sich aus einer Vielzahl von Standard-Dioden so auswƤhlen, dass sie an die Anforderungen bei der erfindungsgemƤƟen NƤhmaschine, insbesondere an das vom ausgesandten Licht zu durchtretende Tauchkƶrpermaterial, angepasst sind.In particular, diodes are suitable for the light source, the light receiver and the warning light. Such components are available at low cost. The wavelength of the light source and the warning light or the sensitivity of the light receiver can be selected from a variety of standard diodes so that they are adapted to the requirements of the sewing machine according to the invention, in particular to the submerged material to be penetrated by the emitted light.

Eine Ausgestaltung des Tauchkƶrpers nach Anspruch 13 ist besonders kompakt.An embodiment of the immersion body according to claim 13 is particularly compact.

Eine erfindungsgemƤƟe NƤhmaschine weist den ƖlbehƤlter in einem senkrechten StƤnder eines GehƤuses auf, und er befindet sich hier hinter einem Sichtfenster, durch das das Warnsignal von auƟen erkennbar ist. Es wird daher von auƟen leicht sichtbar angezeigt, dass Ɩl fehlt, wenn die Warnleuchte leuchtet. Es ist nicht notwendig, den Ɩlstand in dichter Reihenfolge vorsorglich zu Ć¼berprĆ¼fen.A sewing machine according to the invention has the oil container in a vertical stand of a housing, and he is here behind a viewing window, through which the warning signal can be seen from the outside. It is therefore easily visible from the outside that oil is missing when the warning light is lit. It is not necessary to check the oil level in a tight sequence as a precautionary measure.

Eine weitere Aufgabe der Erfindung ist es, einen Tauchkƶrper fĆ¼r den ƖlbehƤlter einer NƤhmaschine anzugeben, mit dem eine nachrĆ¼stbare Ɩlstands-Ɯberwachungseinheit geschaffen werden kann.Another object of the invention is to provide an immersion body for the oil reservoir specify a sewing machine with which a retrofittable oil level monitoring unit can be created.

Diese Aufgabe ist erfindungsgemƤƟ gelƶst durch einen Tauchkƶrper nach Anspruch 14.This object is achieved by a submersible body according to claim 14.

Mit dem erfindungsgemƤƟen Tauchkƶrper kƶnnen auch die ƖlbehƤlter bereits existierender NƤhmaschinen mit geringem Aufwand nachgerĆ¼stet werden. Ansonsten entsprechen die Vorteile des Tauchkƶrpers denjenigen, die oben bereits im Zusammenhang mit der erfindungsgemƤƟen NƤhmaschine erlƤutert wurden.With the immersion body according to the invention also the oil reservoir of existing sewing machines can be retrofitted with little effort. Otherwise, the advantages of the immersion body correspond to those which have already been explained above in connection with the sewing machine according to the invention.

Im folgenden werden bevorzugte AusfĆ¼hrungsbeispiele der Erfindung anhand der beigefĆ¼gten Zeichnung nƤher erlƤutert.

Fig. 1
ist eine Gesamtdarstellung einer erfindungsgemƤƟen NƤhmaschine mit einem ƖlbehƤlter mit Ɩlmangelanzeige gemƤƟ der Erfindung;
Fig. 2
ist eine vom MaƟstab her grĆ¶ĆŸere, teilweise aufgebrochene Seitenansicht des erfindungsgemƤƟen ƖlbehƤlters;
Fig. 3
ist eine Draufsicht auf den ƖlbehƤlter gemƤƟ Fig. 2;
Fig. 4
ist eine perspektivische Darstellung eines Deckels des ƖlbehƤlters gemƤƟ Fig. 2 und 3;
Fig. 5
ist ein Schnitt durch den in Fig. 4 gezeigten Deckel entlang der Schnittebene V-V in Fig. 3;
Fig. 6
ist ein Teilschnitt durch den Deckel des ƖlbehƤlters mit einem Tauchkƶrper entlang der Linie VI-VI in Fig. 3;
Fig. 7
ist eine Ansicht des ƖlbehƤlters von rechts in Fig. 2;
In the following preferred embodiments of the invention will be described with reference to the accompanying drawings.
Fig. 1
is an overall view of a sewing machine according to the invention with an oil tank with lack of oil according to the invention;
Fig. 2
is a larger-scale, partially broken-away side view of the oil container according to the invention;
Fig. 3
is a plan view of the oil tank according to Fig. 2 ;
Fig. 4
is a perspective view of a lid of the oil container according to FIGS. 2 and 3 ;
Fig. 5
is a section through the in Fig. 4 shown cover along the cutting plane VV in Fig. 3 ;
Fig. 6
is a partial section through the lid of the oil container with a plunger along the line VI-VI in Fig. 3 ;
Fig. 7
is a view of the oil tank from the right in Fig. 2 ;

Fig. 1 ist eine schematische Seitenansicht einer NƤhmaschine mit einer gehƤusefƶrmigen Grundplatte 10, einem von dieser senkrecht aufragenden StƤnder 12 und einem vom oberen Ende des StƤnders 12 ausgehenden, parallel zur Grundplatte 10 laufenden waagerechten Arm 14. Im Arm 14 ist in Ć¼blicher Weise eine in Fig. 1 nicht sichtbare angetriebene Armwelle gelagert, Ć¼ber die eine schematisch angedeutete Nadelstange 15 mit einer Nadel auf- und abgehend antreibbar ist. Fig. 1 is a schematic side view of a sewing machine with a housing-shaped base plate 10, a vertically upstanding from this stand 12 and an outgoing from the upper end of the stator 12, parallel to the base plate 10 running horizontal arm 14. In the arm 14 is in a conventional manner in Fig. 1 stored not visible driven arm shaft, via which a schematically indicated needle bar 15 with a needle up and down is driven.

In dem StƤnder 12 befindet sich ein erster ƖlbehƤlter 16, auf den im weiteren Verlauf der Beschreibung nƤher eingegangen wird. Ein zweiter ƖlbehƤlter 18 ist im GehƤuse 10 angeordnet. Der erste ƖlbehƤlter 16 versorgt Ć¼ber eine Dochtleitung 20 und einen Verteiler 22 sowie eine weitere Dochtleitung 24 einen nicht im einzelnen dargestellten Bereich der NadelfĆ¼hrung.In the stator 12 is a first oil reservoir 16, which will be discussed in more detail in the course of the description. A second oil tank 18 is disposed in the housing 10. The first oil tank 16 supplies via a wick line 20 and a distributor 22 and a further wick line 24 a not shown in detail range of the needle guide.

Ɯber eine weitere Dochtleitung 26 versorgt der erste ƖlbehƤlter 16 den zweiten ƖlbehƤlter 18 mit Ɩl, der seinerseits Ć¼ber eine weitere Dochtleitung 28 mit einem Fadengreifer 30 verbunden ist. Ein unterer Bereich der Grundplatte 10 nimmt eine Ɩlwanne 32 auf, die zum Auffangen von herabtropfendem Ɩl dient. Dieses Ɩl wird Ć¼ber eine Leitung 34, in der sich eine Pumpe 36 befindet, die durch einen Motor 38 angetrieben wird, zum Verteiler 22 zurĆ¼ckgepumpt. Weitere Einzelheiten der NƤhmaschine in ihrer Gesamtheit sind im vorliegenden Zusammenhang nicht von Bedeutung.Via a further wick line 26, the first oil reservoir 16 supplies the second oil reservoir 18 with oil, which in turn is connected to a yarn gripper 30 via a further wick line 28. A lower portion of the base plate 10 receives an oil pan 32, which serves to catch dripping oil. This oil is pumped back to the manifold 22 via a conduit 34 in which there is a pump 36 driven by a motor 38. Further details of the sewing machine in its entirety are not relevant in the present context.

AnschlieƟend soll unter Bezugnahme auf die Fig. 2 bis 7 der ƖlbehƤlter 16 nƤher beschrieben werden. GemƤƟ Fig. 2 und 3 weist der ƖlbehƤlter 16 ein kastenfƶrmiges GehƤuse 40 auf, dessen Form in einigen Einzelheiten an die ƶrtlichen PlatzverhƤltnisse angepasst ist, wie Fig. 3 zeigt. Der ƖlbehƤlter 16 ist in eine Ausnehmung 42 einer GehƤusewand 44 des StƤnders 12 der NƤhmaschine eingepasst. Das GehƤuse 40 wird durch einen Deckel 46 verschlossen, der insbesondere in Fig. 2 und 4 zu erkennen ist. Der Deckel 46 weist einen erhƶhten, pultfƶrmig ansteigenden Bereich 48 und einen tieferen, im wesentlichen plattenfƶrmigen Bereich 50 auf. In dem plattenfƶrmigen Bereich 50 befinden sich zunƤchst zwei Ɩffnungen 52, 54, die an einer Unterseite des plattenfƶrmigen Bereichs 50 in Rƶhren 56, 58 Ć¼bergehen.Subsequently, referring to the Fig. 2 to 7 the oil tank 16 will be described in more detail. According to FIGS. 2 and 3 the oil tank 16 has a box-shaped housing 40, the shape of which is adapted in some detail to the local space conditions, such as Fig. 3 shows. The oil tank 16 is fitted in a recess 42 of a housing wall 44 of the stand 12 of the sewing machine. The housing 40 is closed by a cover 46, in particular in Fig. 2 and 4 can be seen. The lid 46 has an elevated, tray-shaped rising portion 48 and a deeper, substantially plate-shaped portion 50. In the plate-shaped region 50 are initially two openings 52, 54, which merge at an underside of the plate-shaped portion 50 in tubes 56, 58.

Diese Rƶhren nehmen die beiden im Zusammenhang mit Fig. 1 erwƤhnten Dochtleitungen 20, 26 auf, die in Fig. 2 und 7 gezeigt, in den Ć¼brigen Darstellungen jedoch fortgelassen sind.These tubes take the two in connection with Fig. 1 mentioned wick lines 20, 26, the in FIGS. 2 and 7 shown, but omitted in the other representations.

Zwischen den beiden Rƶhren 56, 58 ist an der Unterseite des plattenfƶrmigen Bereichs 50 des Deckels 46 ein Tauchkƶrper 60 befestigt, insbesondere an den Deckel 46 als zusammenhƤngendes Kunststoffteil angeformt. Der Tauchkƶrper 60 ragt in ein Vorratsvolumen 61 des ƖlbehƤlters 16. In Zuordnung zu dem Tauchkƶrper 60 befinden sich in dem plattenfƶrmigen Bereich 50 drei in einem Dreieck angeordnete Ɩffnungen 62, 64, 66, die in entsprechende Ausnehmungen 68, 70, 72 im oberen Bereich des Tauchkƶrpers 60 Ć¼berleiten. Zwei der Ausnehmungen 68, 70, die mit den Ɩffnungen 62, 64 fluchten, sind in Fig. 6 gezeigt. Die dritte Ausnehmung 72, die mit der dritten Ɩffnung 66 fluchtet, ist in Fig. 5 erkennbar.Between the two tubes 56, 58, a submersible body 60 is attached to the underside of the plate-shaped portion 50 of the lid 46, in particular integrally formed on the lid 46 as a continuous plastic part. The immersion body 60 protrudes into a reservoir volume 61 of the oil reservoir 16. In association with the immersion body 60, three openings 62, 64, 66 arranged in a triangle are located in the plate-shaped area 50, which openings are in corresponding recesses 68, 70, 72 in the upper area of the Pass on the immersion body 60. Two of the recesses 68, 70 which are aligned with the openings 62, 64 are in Fig. 6 shown. The third recess 72, which is aligned with the third opening 66, is in Fig. 5 recognizable.

Abgesehen von diesen Ausnehmungen 68, 70, 72 ist der Tauchkƶrper 60 als massiver Kƶrper aus lichtdurchlƤssigem Material, beispielsweise Acrylglas ausgebildet.Apart from these recesses 68, 70, 72 of the immersion body 60 as a solid body of translucent material, for example Acrylic glass formed.

Auf den Deckel 46 ist im Bereich des Tauchkƶrpers 60 eine TrƤgerplatte 74 aufgesetzt, insbesondere mit Hilfe eines am Deckel 46 angeformten Rasthakens 76 aufgerastet. Auf der TrƤgerplatte 74 sind an den drei Ausnehmungen 68, 70, 72 zugeordneten Positionen eine Leuchtdiode 78 als Lichtquelle, eine Licht empfangende Diode 80, also eine Photodiode, und eine weitere Leuchtdiode 82 angeordnet. Die Licht empfangende Diode 80 und die weitere Leuchtdiode 82 stehen miteinander in Signalverbindung. Die weitere Leuchtdiode 82 dient als Warnleuchte, die von der Licht empfangenden Diode 80 ein- und ausgeschaltet werden kann.On the lid 46, a support plate 74 is placed in the region of the immersion body 60, in particular by means of a latch 46 formed on the cover 46 latched. On the support plate 74 are at the three recesses 68, 70, 72 associated positions a light emitting diode 78 as a light source, a light receiving diode 80, ie a photodiode, and a further light-emitting diode 82 is arranged. The light-receiving diode 80 and the further light-emitting diode 82 are in signal connection with one another. The further light-emitting diode 82 serves as a warning light which can be switched on and off by the light-receiving diode 80.

Fig. 5 und 6 zeigen zwei zueinander senkrechte Schnitte durch den Tauchkƶrper 60 entlang der Linien V-V und VI-VI in Fig. 3. In dem in Fig. 6 gezeigten Schnitt sind die Leuchtdiode 78 und die Licht empfangende Diode 80 gezeigt. Der Schnitt gemƤƟ Fig. 5 zeigt die Warnleuchte 82. FIGS. 5 and 6 show two mutually perpendicular sections through the plunger 60 along the lines VV and VI-VI in Fig. 3 , In the in Fig. 6 In the section shown, the light-emitting diode 78 and the light-receiving diode 80 are shown. The cut according to Fig. 5 shows the warning light 82.

Ein unterer Boden des Tauchkƶrpers 60 weist zwei gegeneinander gerichtete SchrƤgflƤchen von etwa 45Ā° auf, die als ReflexionsflƤchen 84, 86 bezeichnet sind. Ein von der Leuchtdiode 78 ausgesendeter Lichtstrahl 88 trifft auf die erste ReflexionsflƤche 84. Solange der Tauchkƶrper 60 in das Ɩlbad innerhalb des ƖlbehƤlters 16 eintaucht, lƤuft der Strahl im wesentlichen gerade durch die ReflexionsflƤche 84 hindurch in das Ɩlbad hinein, wie es durch eine strichpunktierte Linie angedeutet ist.A lower bottom of the immersion body 60 has two mutually opposing inclined surfaces of about 45 Ā°, which are referred to as reflecting surfaces 84, 86. A light beam 88 emitted by the light-emitting diode 78 impinges on the first reflection surface 84. As long as the immersion body 60 dips into the oil bath within the oil tank 16, the jet passes essentially straight through the reflection surface 84 into the oil bath, as indicated by a dot-dash line is indicated.

Wenn das Ɩlbad so weit abgesunken ist, dass der untere Boden des Tauchkƶrpers 60 freiliegt, wird der Lichtstrahl 88 Ć¼ber die beiden ReflexionsflƤchen 84, 86 so umgelenkt, dass er parallel zu der Licht empfangenden Diode 80 zurĆ¼ckgeworfen wird. Diese gibt einen Schaltimpuls ab, Ć¼ber den die Warnleuchte 82 eingeschaltet wird, so dass diese ein Lichtsignal abgibt.When the oil bath has dropped so far that the lower bottom of the immersion body 60 is exposed, the light beam 88 is deflected over the two reflection surfaces 84, 86 so that it is reflected back parallel to the light-receiving diode 80. This outputs a switching pulse, over which the Warning light 82 is turned on, so that it emits a light signal.

Wie erwƤhnt, ist die in Fig. 2 und 3 auf der rechten Seite gezeigte Wand 90 des GehƤuses 40 in die Ausnehmung 42 der GehƤusewand 44 der NƤhmaschine eingebettet. Dadurch ergibt sich ein Fenster 92 (Fig. 1), durch das der ƖlbehƤlter 16 von auƟen sichtbar ist. Da die Ausnehmung 42 nicht so bemessen ist, dass die Warnleuchte 82 direkt von auƟen sichtbar wƤre, wird der Lichtstrahl der Warnleuchte 82 durch einen Ansatz 94 des Tauchkƶrpers 60 geleitet und auf eine unter 45Ā° angeordnete untere ReflexionsflƤche 96 des Ansatzes und hier um 90Ā° aus dem Tauchkƶrper 60 heraus sowie durch das Fenster 92 nach auƟen reflektiert. Das bedeutet, dass das Signal der Leuchtdiode 78 an einer markanten Stelle an der AuƟenseite der NƤhmaschine relativ weit sichtbar ist, so dass das Personal auf den Ɩlmangel hingewiesen wird.As mentioned, the in FIGS. 2 and 3 Wall 90 shown on the right side of the housing 40 embedded in the recess 42 of the housing wall 44 of the sewing machine. This results in a window 92 ( Fig. 1 ), through which the oil reservoir 16 is visible from the outside. Since the recess 42 is not dimensioned so that the warning light 82 would be visible directly from the outside, the light beam of the warning light 82 is passed through a projection 94 of the immersion body 60 and arranged at 45 Ā° lower reflection surface 96 of the approach and here by 90 Ā° out of the immersion body 60 and out through the window 92 to the outside. This means that the signal of the light-emitting diode 78 is relatively far visible at a prominent location on the outside of the sewing machine, so that the staff is informed of the lack of oil.

ErgƤnzend sei noch erwƤhnt, dass in Fig. 2, 4, 5 und 6 eine Leitung 98 gezeigt ist, die auch bereits in Fig. 1 erkennbar war und eine Verbindung zwischen den Dioden 78 bis 82 und einer Versorgungselektronik 100 herstellt.In addition, it should be mentioned that in Fig. 2, 4 . 5 and 6 a line 98 is shown which is already in Fig. 1 was recognizable and establishes a connection between the diodes 78 to 82 and a supply electronics 100.

ErfindungsgemƤƟ wird also eine kompakte Ɩlstands-Ɯberwachungseinheit geschaffen, die beispielsweise als Austauschteil im Zusammenhang mit einem herkƶmmlichen ƖlbehƤlter verwendet werden kann. Der Deckel 46 mit dem Tauchkƶrper 60 kƶnnen als zusammenhƤngende Einheit gespritzt werden. Elektrische AnschlĆ¼sse sind nur bis zu der TrƤgerplatte 74 auf der Oberseite des Tauchkƶrpers 60 notwendig. Im Ɩlbad selbst befinden sich keinerlei bewegliche Teile und keinerlei elektrische oder elektronische Leitungen.Thus, according to the invention, a compact oil level monitoring unit is provided which can be used, for example, as a replacement part in conjunction with a conventional oil tank. The lid 46 with the immersion body 60 can be injected as a coherent unit. Electrical connections are only necessary up to the support plate 74 on the upper side of the immersion body 60. The oil bath itself contains no moving parts and no electrical or electronic lines.

Wie bereits zum Ausdruck gebracht wurde, ist die Orientierung im Raum, also der Eintritt des Tauchkƶrpers 60 von oben, von der Seite oder von unten in den ƖlbehƤlter 16 an sich unerheblich. Es kommt lediglich darauf an, dass der Tauchkƶrper 60 eine FlƤche aufweist, die zeitweilig bei vollem ƖlbehƤlter 16 im Ɩl liegt und bei zunehmend leerem ƖlbehƤlter 16 frei wird.As already stated, orientation in space, Thus, the entry of the immersion body 60 from above, from the side or from below into the oil tank 16 is irrelevant. It is only important that the immersion body 60 has an area that is temporarily in full oil reservoir 16 in the oil and is released at increasingly empty oil tank 16.

In jedem Fall ist es vorteilhaft, den Deckel 46 des ƖlbehƤlters 16 oder ein entsprechendes Verschlussteil zusammenhƤngend mit dem Tauchkƶrper 60 als ein Teil zu spritzen.In any case, it is advantageous to inject the cover 46 of the oil container 16 or a corresponding closure part in a coherent manner with the immersion body 60 as a part.

Welche Form der Tauchkƶrper 60 aufweist, ist ebenfalls unerheblich. Es muss lediglich eine ReflexionsflƤche vorgesehen sein, die von der Lichtquelle, also von der Leuchtdiode 78, angestrahlt werden kann. Dies kann direkt oder auch nach Umlenkung Ć¼ber weitere ReflexionsflƤchen geschehen.Which shape of the immersion body 60 has, is also irrelevant. It is only necessary to provide a reflection surface that can be illuminated by the light source, that is to say by the light-emitting diode 78. This can be done directly or after deflection over other reflective surfaces.

Eine Ɩlmangelanzeige bzw. eine Ɩlstands-Ɯberwachungseinheit gemƤƟ der vorliegenden Erfindung kann selbstverstƤndlich auch beim zweiten ƖlbehƤlter 18 vorgesehen sein, der sich in der Grundplatte 10 der Maschine befindet, wie der ƖlbehƤlter 16 der beschriebenen AusfĆ¼hrungsform. Besonders vorteilhaft ist jedoch eine erfindungsgemƤƟe FĆ¼llstandsĆ¼berwachung fĆ¼r den oberen ƖlbehƤlter 16, wenn dieser in der Art der beschriebenen AusfĆ¼hrungsform mit dem unteren ƖlbehƤlter 18 verbunden ist. Der untere ƖlbehƤlter 18 ist Ć¼ber die Leitung 26 mit dem oberen BehƤlter verbunden, und ein nicht bezeichnetes RĆ¼ckschlagventil verhindert das Ɯberlaufen des unteren ƖlbehƤlters 18. Das bedeutet, dass der untere ƖlbehƤlter 18 immer im ordnungsgemƤƟ gefĆ¼llten Zustand ist, solange sich eine nennenswerte Menge Ɩl im oberen ƖlbehƤlter 16 befindet.Of course, a lack of oil gauge or an oil level monitoring unit according to the present invention may also be provided on the second oil tank 18 located in the base plate 10 of the machine, such as the oil tank 16 of the described embodiment. However, a filling level monitoring according to the invention for the upper oil tank 16 is particularly advantageous when it is connected to the lower oil tank 18 in the manner of the described embodiment. The lower oil tank 18 is connected via the line 26 to the upper tank, and a non-designated non-return valve prevents the overflow of the lower oil tank 18. That means that the lower oil tank 18 is always in the properly filled state, as long as a significant amount of oil in upper oil reservoir 16 is located.

Mit anderen Worten, durch die Ɯberwachung des oberen ƖlbehƤlters 16 mit einer erfindungsgemƤƟen Anzeigevorrichtung kann dafĆ¼r gesorgt werden, dass beide ƖlbehƤlter 16,18 stets angemessen gefĆ¼llt sind.In other words, by monitoring the upper oil tank 16 with a display device according to the invention can be ensured that both oil tanks 16,18 are always adequately filled.

Claims (11)

  1. Sewing machine, comprising
    - an oil tank (16) for supply of at least one lubricating point;
    characterized by
    - an immersion body (60) which is at least sectionally made of transparent material, projecting into a supplies reservoir (61) of the oil tank (16) and having at least one reflection surface (84, 86) accessible from the supplies reservoir;
    - a light source (78) for emitting a light beam (88) on to the reflection surface (84, 86);
    - a light receiver (80) which is disposed in the beam path of the light beam of the light source (78) that is reflected by the reflection surface (84, 86), the light receiver (80) being designed for triggering a switching pulse when the light beam (88) hits the light receiver (80),
    wherein
    - recesses (68, 70, 72) for the light source (78) and the light receiver (80) are provided in the top area of the immersion body (60), the overall immersion body (60) consisting of transparent material,
    - the reflection surface (84, 86) is formed by an outer surface of the immersion body (60).
  2. Sewing machine according to claim 1, characterized in that the immersion body (60) projects from above into the oil tank (16) and in that the light source (78) and the light receiver (80) are located in a top area of the immersion body (60).
  3. A sewing machine according to claim 1 or 2, characterized in that the reflection surface (84, 86) is a plane surface of a transparent bottom area of the immersion body (60).
  4. A sewing machine according to claim 2 or 3, characterized in that the light source (78) and the light receiver (80) are disposed side by side in the top area of the immersion body (60).
  5. A sewing machine according to one of the preceding claims, characterized in that two reflection surfaces (84, 86) are provided, which incline such that the light beam that is reflected by the reflection surfaces (84, 86) is reflected by the reflection surfaces (84, 86) in parallel to the beam of the light source (78) back towards the light receiver (80).
  6. A sewing machine according to one of the preceding claims, characterized in that the light source (78) and the light receiver (80) are disposed on a bearing plate (74) which is placed on, in particular snap-engaged with, the immersion body (60).
  7. A sewing machine according to one of the preceding claims, characterized in that an indicator lamp (82) is provided, which is visible from outside and able to be switched by the light receiver (80).
  8. A sewing machine according to claim 7, characterized in that the indicator lamp (82) is integrated into the top area of the immersion body (60).
  9. A sewing machine according to claim 8, characterized in that the indicator lamp (82) is located in a recess (72) in the top area of the immersion body and in that the indicator lamp (82) is also mounted on the bearing plate (74).
  10. A sewing machine according to one of the preceding claims, characterized in that the light source (78), the light receiver (80) and the indicator lamp (82) are diodes.
  11. A sewing machine according to one of the preceding claims, characterized in that the immersion body (60) is an integral component of a cover (46) of the oil tank (16) and in that the bearing plate (74) is fixed to the cover (46), with the light source (78), the light receiver (80) and the indicator lamp (82) projecting into recesses (68, 70, 72) of the immersion body through corresponding holes (62, 64, 66) of the cover (46).
EP05007235A 2004-04-08 2005-04-02 Sewing machine with an oil tank and plunger for the oil tank of this sewing machine Active EP1584726B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102004018071 2004-04-08
DE102004018071 2004-04-08
DE102004059194A DE102004059194A1 (en) 2004-04-08 2004-12-09 Sewing machine with an oil tank and immersion body for the oil reservoir of such a sewing machine
DE102004059194 2004-12-09

Publications (2)

Publication Number Publication Date
EP1584726A1 EP1584726A1 (en) 2005-10-12
EP1584726B1 true EP1584726B1 (en) 2009-06-10

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EP (1) EP1584726B1 (en)
JP (1) JP2005296659A (en)
KR (1) KR20060046612A (en)
CN (1) CN1680646A (en)
AT (1) ATE433512T1 (en)
DE (2) DE102004059194A1 (en)
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DE102007022050A1 (en) 2007-05-08 2008-11-13 Pfaff Industrie Maschinen Ag Sewing machine, has drive device with lubricant storage tank having lubricant condition detector with capacitive sensor that includes capacity that is variable within range of possible filling level of lubricant based on filling level
KR101140303B1 (en) * 2009-07-30 2012-05-02 (ģ£¼)ėŒ€ķ„ėŒķ•€ Head part automatic oiling apparatus of sewing machine
CN102965862A (en) * 2012-12-05 2013-03-13 äøŠęµ·åƌ山ē²¾åƆęœŗę¢°ē§‘ęŠ€ęœ‰é™å…¬åø Oil quantity detection and alarm mechanism of industrial sewing machine
JP6745183B2 (en) * 2016-09-30 2020-08-26 Jukię Ŗ式会ē¤¾ Oil amount detector for sewing machine
CN110095166A (en) * 2018-01-29 2019-08-06 ę°å…‹ē¼ēŗ«ęœŗč‚”ä»½ęœ‰é™å…¬åø A kind of sewing machine oil amount detecting device and monitoring system
CN109853165A (en) * 2019-03-12 2019-06-07 ę°å…‹ē¼ēŗ«ęœŗč‚”ä»½ęœ‰é™å…¬åø A kind of fuel-flow control structure of sewing machine lubricating oil

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NL8500726A (en) * 1985-03-13 1986-10-01 Tno A device for measuring the refractive index of a fluid, in particular intended for measuring the density of a fluid or the concentration of a substance in solution, and a battery provided with such a device.
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DE102004059194A1 (en) 2005-10-27
TW200536980A (en) 2005-11-16
DE502005007445D1 (en) 2009-07-23
EP1584726A1 (en) 2005-10-12
ATE433512T1 (en) 2009-06-15
KR20060046612A (en) 2006-05-17
CN1680646A (en) 2005-10-12

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