WO1992015984A1 - Device for tensioning the heads of percussion instruments - Google Patents

Device for tensioning the heads of percussion instruments Download PDF

Info

Publication number
WO1992015984A1
WO1992015984A1 PCT/EP1992/000438 EP9200438W WO9215984A1 WO 1992015984 A1 WO1992015984 A1 WO 1992015984A1 EP 9200438 W EP9200438 W EP 9200438W WO 9215984 A1 WO9215984 A1 WO 9215984A1
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WO
WIPO (PCT)
Prior art keywords
opening
screw
clamping
screws
thread
Prior art date
Application number
PCT/EP1992/000438
Other languages
German (de)
French (fr)
Inventor
Werner Sassmannshausen
Original Assignee
Johs. Link Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Johs. Link Gmbh & Co. Kg filed Critical Johs. Link Gmbh & Co. Kg
Publication of WO1992015984A1 publication Critical patent/WO1992015984A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/284—Locking by means of elastic deformation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D13/00—Percussion musical instruments; Details or accessories therefor
    • G10D13/01—General design of percussion musical instruments
    • G10D13/02—Drums; Tambourines with drumheads
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10D—STRINGED MUSICAL INSTRUMENTS; WIND MUSICAL INSTRUMENTS; ACCORDIONS OR CONCERTINAS; PERCUSSION MUSICAL INSTRUMENTS; AEOLIAN HARPS; SINGING-FLAME MUSICAL INSTRUMENTS; MUSICAL INSTRUMENTS NOT OTHERWISE PROVIDED FOR
    • G10D13/00—Percussion musical instruments; Details or accessories therefor
    • G10D13/10—Details of, or accessories for, percussion musical instruments
    • G10D13/16—Tuning devices; Hoops; Lugs

Definitions

  • the invention relates to a tensioning device for the skins of percussion instruments, consisting of threads provided in bearing blocks seated on the circumference of the instrument casing and of screws which are adjustable therein and act on the tire holding tire, the screws in each clamping position relative to the bearing blocks or the threads therein can be set automatically.
  • a tensioning device of this type is already known from DE-PS 28 13 883. It is used in particular in the case of percussion instruments that only require loosely tensioned skins, as is regularly the case when playing modern music, in particular beat music .
  • the screws are therefore provided on their shank with at least one circumferential flattening or indentation, which can be brought into engagement with a circumferential section of a spring clip under radial prestress within the threaded bushings and thereby rotate with the circumferential flattening or indentation - Forms locking device between screw and threaded bush.
  • SPARE BLADE only a self-locking effect in any rotational position between the screw and the threaded bushing, but it also produces a positive locking action in very specific relative positions between the screws and the threaded bushings, which can be easily felt when the screws are actuated, and thus the respective extent of the adjustment made makes it immediately noticeable or noticeable.
  • Clamping devices are also known in which a nut and a lock nut are provided on the screw shaft.
  • the respective clamping position of the screw can first be fixed against the bearing block by tightening the nut and then the nut can be blocked again against undesired loosening by additionally tightening the lock nut.
  • tensioning devices of the generic type first explained are at least user-friendly or easy to use because the tensioning screw of each tensioning device alone has to be manipulated
  • the tensioning devices of the known type described last are also cumbersome to handle because the Operation of each clamping device always requires the handling of three different actuators in a very specific order.
  • a change in the skin tension on percussion instruments with tensioning devices designed in this way is therefore very cumbersome and time-consuming.
  • the invention aims not only to eliminate the deficiencies inherent in the known tensioning devices.
  • This goal is basically achieved according to the invention by a clamping piece made of elastomeric material, in which a breakthrough is provided which is penetrated directly by the thread of the screw, the smallest opening width of the breakthrough falling below the thread outer diameter of the screw, and wherein Clamping piece on the bearing block and / or directly on the shell body or the like of the percussion instrument carrying it has a rotationally fixed bearing.
  • clamping pieces All materials of rubber-like elasticity that are available for technical use can be used to produce clamping pieces according to the invention.
  • the clamping pieces can be produced from natural rubber, synthetic rubber, rubber-like materials or other plastics.
  • the clamping pieces can be arranged in the length range of the screws which is exposed between the bearing blocks seated on the drum shell and the radial flange of the skin hoop. There you can get your non-rotatable abutment directly on the outer circumference of the drum shell.
  • the opening in each clamping piece has a circular outline shape and its diameter does not fall below the core diameter of the screw.
  • the braking force on the screw is caused solely by the fact that the threads of the screw under elastic intervene in the walls of the opening.
  • the outline shape of the opening in the clamping pieces it is also possible for the outline shape of the opening in the clamping pieces to deviate from the circular shape, and in this case its smallest opening cross-section not or only insignificantly less than the core diameter of the screw.
  • the threads of the screw shank penetrate into the walls of the opening only with limited peripheral areas with elastic deformation, while the other peripheral areas maintain a distance from the boundary walls of the opening.
  • the end section of the clamping piece that is distant from the opening is provided with a support base, the support width of which is at least equal to, but preferably greater than, the distance of the opening from this support base.
  • the purpose of this design measure is to maintain a permanently effective support connection between each clamping piece and the peripheral part of the drum shell that is adjacent to it.
  • a simple adaptability of the clamping pieces to different radii of curvature of the drum casing can be achieved according to the invention in that the support base is formed by two feet delimited from one another by an indentation.
  • REPLACEMENT LEAF is provided because this promotes the flawless appearance of each clamping device.
  • the invention also provides that the clamping pieces have a thickness which is at least a multiple z. B. four times the thread pitch of the screw corresponds to the shape that a relatively large braking surface is available for the engagement of the screw thread.
  • FIG. 1 shows a top view of a device equipped with tensioning devices for the drum or skins
  • FIG. 2 shows a section along the line II-II in FIG. 1 approximately in natural size through a tensioning device of the drum
  • FIG. 3 shows, on a further enlarged scale, a view in the direction of arrow III-III of FIG. 2 of an essential element of the tensioning device according to FIG
  • FIGS. 4 to 10 each show views corresponding to FIG. 3 of modified versions of the essential element of the tensioning device.
  • a drum 1 can be seen as an application example of the invention, which has an annular casing 2, over one end of which the skin 3 is placed. With its edges is there the skin 3 is fastened in a strip 4 which surrounds the upper end of the jacket 2 with concentric play.
  • the tire 4 has a radial flange 5 on which several, according to FIG. 1 for example eight clamping devices 6 act, which are arranged uniformly distributed over the circumference of the drum 1.
  • Each tensioning device 6 has a bearing block 7 which is rigidly seated on the outer side of the drum shell 2.
  • Either a nut thread 8 is incorporated directly into this bearing block 7, or else — in the case of a more complex construction of the tensioning device — is non-rotatably in the bearing block 7 , but against the force of a spring axially displaceable, a threaded bushing with a corresponding nut thread is used.
  • the shaft 9 of a screw 10 is engaged with the nut thread 8 and has a radial adjustment slot 12 in its head 11, for example. With the head 11, the screw 10 acts on the upper side of the radial flange 5 provided on the tire 4.
  • a rotation of the screw 10 by means of a suitable socket wrench leads to the fact that this shifts axially with its shaft 9 in the nut thread 8, with the result that the tension of the skin 3 supported on one end of the drum shell 2 changes via the tire 4 can be.
  • These securing arrangements consist of a clamping piece 13 which contains an opening 14 which is penetrated directly by the thread of the shaft 9 of the screw 10.
  • the clamping piece 13 consists of elastomeric material, for example rubber, synthetic rubber or plastic.
  • the clamping piece 13 is designed such that it receives a non-rotatable abutment either on the bearing block 7 or, as can be seen in FIGS. 2 and 3, directly on the drum casing 2 carrying the latter, when the opening 14 is removed from the shaft 9 of the screw 10 is axially penetrated.
  • the support base 15 can also easily adapt to different radii of curvature of the drum shell 2 and to different distances of the screws 10 from the drum shell 2, it is expedient that these are separated from one another by two feet 17 and 18 is formed.
  • This design allows the clamping piece 13 to be used for a wide variety of sizes and types of percussion instruments. For a perfect appearance of the clamping piece, it is still from
  • the thickness of the clamping pieces 13 should be dimensioned, at least in the area of their opening 14, in such a way that it corresponds to a multiple of the thread pitch on the shaft 9 of the screw 10, it having proven to be advantageous to adapt this thickness to at least four times the thread pitch.
  • the braking forces exerted on the thread flanks are so great that the screw 10 can only be manipulated using a suitable adjustment key, while an automatic adjustment is impossible.
  • FIGS. 4 to 10 It can be seen from FIGS. 4 to 10 that the formation of the opening 14 in the clamping piece 13 can be varied in accordance with different needs.
  • FIG. 4 it can be seen, for example, that the opening 14, which has a circular outline in accordance with FIG. 3, is surrounded at a distance by a ring made up of many small round holes 20 in order to increase the elasticity of the walls of the opening 14.
  • the opening 14 has a square outline shape, with the result that only four limited circumferential areas of the thread on the shaft 9 of the screw 10 penetrate the breakthrough walls with elastic deformation, while circumferential areas lying in between remain free from this engagement.
  • the opening 14 has a hexagonal outline, while according to FIG. 7 it is present with an octagonal outline.
  • each opening 14 again has an essentially circular outline, whereby however, at several evenly distributed circumferential locations there are radially inwardly directed knobs or beads 21. While the largest diameter of the openings 14 according to FIGS. 8 and 9 should at least correspond to the outer diameter of the shaft 9 of the screw 10, the knobs or beads 21 can be designed in such a way that they narrow the passage cross section to a dimension which corresponds to that Core diameter on the shaft 9 corresponds to the screw 10 or even falls short of it.
  • FIG. 10 shows a design of an opening 14 in a clamping piece 13 which is further developed from FIGS. 8 and 9.
  • the opening 14 has an approximately star-shaped shape, which is delimited on the one hand by six inwardly projecting beads or knobs and on the other hand by six intervening recesses.
  • the opening 14 is expediently designed such that its largest diameter dimension exceeds the outside diameter of the thread on the shaft 9 of the screw 10, while the smallest or free diameter has a smaller dimension than the core diameter of the thread on Shank 9 of screw 10.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Music (AREA)

Abstract

A device (6) for tensioning the heads (3) of percussion instruments (1) consists of screw threads (8) in bearing blocks (7) located on the rim of the shell (2) and screws (10) which can be adjusted in said screw threads and which grip the counterhoop (4) holding the head (3). In each tensioning position, the screws (10) can be positioned independently with respect to the bearing blocks (7) or the screw threads (8) in the latter. The simple structure and reliable functioning of the fixing of the screws (10) is achieved by means of a perforation (14) in a clamping piece (13) made of elastomeric material, which the thread of the screws (10) traverses directly. The smallest internal width of the perforation (14) is less than the outer diameter of the screw thread of the screws, and the locking piece (13) has a torsionproof abutment (15) on the bearing block and/or directly on the shell (2) or similar element of the percussion instrument which carries the bearing block (7).

Description

Spannvorrichtung für die Felle von SchlaginstrumentenClamping device for the skins of percussion instruments
Die Erfindung betrifft eine Spann orrichtung für die Felle von Schlaginstrumenten, bestehend aus in am Umfang des Instrumentenmantel sitzenden Lagerböcken vorgesehe¬ nen Gewinden und aus darin verstellbaren sowie an dem das Fell haltenden Reifen angreifenden Schrauben, wobei die Schrauben in jeder Spannstellung relativ zu den Lagerböcken bzw. den darin befindlichen Gewinden selbst¬ tätig festlegbar sind.The invention relates to a tensioning device for the skins of percussion instruments, consisting of threads provided in bearing blocks seated on the circumference of the instrument casing and of screws which are adjustable therein and act on the tire holding tire, the screws in each clamping position relative to the bearing blocks or the threads therein can be set automatically.
Eine Spannvorrichtung dieser Art ist bereits bekannt durch die DE-PS 28 13 883. Sie steht insbesondere bei solchen Schlaginstrumenten in Gebrauch, die nur locker gespannte Felle erfordern, wie das beim Spielen neuzeit¬ licher Musik, insbesondere Beat-Musik, regelmäßig der Fall ist.A tensioning device of this type is already known from DE-PS 28 13 883. It is used in particular in the case of percussion instruments that only require loosely tensioned skins, as is regularly the case when playing modern music, in particular beat music .
Da die locker gespannten Felle nur zu einer geringen Reibungskraft zwischen den Gewindegängen der Schrauben und den Innengewinden in den Lagerböcken führen, muß die Sicherung der Schrauben gegen unerwünschtes Verdrehen durch zusätzliche Mittel gewährleistet werden. Nach der DE-PS 28 13 883 sind deshalb die Schrauben an ihrem Schaft mit mindestens einer Umfangsabflachung oder -Einbuchtung versehen, die innerhalb der Gewindebuchsen mit einem Umfangsabschnitt eines Federbügels unter radialer Vorspannung in Eingriff bringbar ist und dabei mit der Umfangsabflachung oder -Einbuchtung eine Dreh- Rastvorrichtung zwischen Schraube und Gewindebuchse bildet.Since the loosely tensioned skins only lead to a low frictional force between the threads of the screws and the internal threads in the pedestals, the securing of the screws against unwanted twisting must be ensured by additional means. According to DE-PS 28 13 883, the screws are therefore provided on their shank with at least one circumferential flattening or indentation, which can be brought into engagement with a circumferential section of a spring clip under radial prestress within the threaded bushings and thereby rotate with the circumferential flattening or indentation - Forms locking device between screw and threaded bush.
Diese Ausgestaltung der Spannvorrichtung bietet nichtThis configuration of the tensioning device does not offer
ERSATZBLÄTT nur eine selbsthemmende Wirkung in jeder beliebigen Drehlage zwischen der Schraube und der Gewindebuchse, sondern sie bringt in ganz bestimmten Relativlagen zwischen Schrauben und Gewindebuchsen auch noch eine formschlüssige Rastwirkung hervor, welche beim Betätigen der Schrauben leicht spürbar ist und damit auch das jeweilige Ausmaß der vorgenommenen Verstellung unmittel¬ bar fühlbar bzw. bemerkbar macht.SPARE BLADE only a self-locking effect in any rotational position between the screw and the threaded bushing, but it also produces a positive locking action in very specific relative positions between the screws and the threaded bushings, which can be easily felt when the screws are actuated, and thus the respective extent of the adjustment made makes it immediately noticeable or noticeable.
Bekannt sind auch Spannvorrichtungen, bei denen auf dem Schraubenschaft jeweils eine Mutter und eine Kontermut¬ ter vorgesehen sind. Hierbei kann die jeweilige Spann¬ stellung der Schraube zunächst durch Anziehen der Mutter gegen den Lagerbock fixiert und daraufhin durch zusätz¬ liches Anziehen der Kontermutter wiederum die Mutter gegen unerwünschtes Lockern blockiert werden.Clamping devices are also known in which a nut and a lock nut are provided on the screw shaft. The respective clamping position of the screw can first be fixed against the bearing block by tightening the nut and then the nut can be blocked again against undesired loosening by additionally tightening the lock nut.
Beide vorbekannten Spannvorrichtungen haben eine relativ aufwendige Ausbildung und bedingen deshalb einen ent¬ sprechend hohen Kostenaufwand beim Bau der Schlagin¬ strumente.Both previously known tensioning devices have a relatively complex design and therefore entail a correspondingly high cost in the construction of the percussion instruments.
Während aber Spannvorrichtungen der zuerst erläuterten, gattungsgemäßen Art zumindest bedienungs- bzw. handha¬ bungsfreundlich sind, weil jeweils allein die Spann¬ schraube jeder Spannvorrichtung manipuliert werden muß, sind die Spannvorrichtungen der zuletzt beschriebenen, bekannten Art auch noch in ihrer Handhabung umständlich, weil die Bedienung jeder Spannvorrichtung immer die Handhabung von drei verschiedenen Stellgliedern in ganz bestimmter Reihenfolge erforderlich macht. Eine Änderung der Fellspannung an Schlaginstrumenten mit solchermaßen ausgelegten Spannvorrichtungen ist daher sehr umständ¬ lich und zeitraubend.However, while tensioning devices of the generic type first explained are at least user-friendly or easy to use because the tensioning screw of each tensioning device alone has to be manipulated, the tensioning devices of the known type described last are also cumbersome to handle because the Operation of each clamping device always requires the handling of three different actuators in a very specific order. A change in the skin tension on percussion instruments with tensioning devices designed in this way is therefore very cumbersome and time-consuming.
Die Erfindung bezweckt nicht nur die Beseitigung der den bekannten Spannvorrichtungen anhaftenden Unzulänglich-The invention aims not only to eliminate the deficiencies inherent in the known tensioning devices.
ERSATZBLATT keiten. Vielmehr liegt ihr auch die Aufgabe zugrunde, eine gattungsgemäße Spannvorrichtung zu schaffen, die bei vereinfachtem Gesamtaufbau eine einfache, sichere und selbstätige Drehlagenfixierung der Spannschrauben in jeder möglichen FunktionsStellung gewährleistet.REPLACEMENT LEAF keiten. Rather, it is also based on the task of creating a generic tensioning device which, with a simplified overall structure, ensures simple, safe and automatic rotation fixing of the tensioning screws in every possible functional position.
Erreicht wird dieses Ziel nach der Erfindung grundsätz¬ lich durch ein Klemmstück aus elastomerem Werkstoff,in dem ein unmittelbar vom Gewinde der Schraube durchgrif- fener Durchbruch vorgesehen ist, wobei die kleinste öffnungsweite des Durchbruchs den Gewinde-Außendurchmes¬ ser der Schraube unterschreitet und wobei das Klemmstück am Lagerbock und/oder unmittelbar an dem diesen tragen¬ den Mantelkörper oder dergleichen des Schlaginstrumentes ein drehfestes Wiederlager hat.This goal is basically achieved according to the invention by a clamping piece made of elastomeric material, in which a breakthrough is provided which is penetrated directly by the thread of the screw, the smallest opening width of the breakthrough falling below the thread outer diameter of the screw, and wherein Clamping piece on the bearing block and / or directly on the shell body or the like of the percussion instrument carrying it has a rotationally fixed bearing.
Zur Herstellung erfindungsgemäßer Klemmstücke können alle Stoffe gummiartiger Elastizität zum Einsatz ge¬ langen, die zur technischen Anwendung verfügbar sind. Insbesondere lassen sich die Klemmstücke aus natürlichem Kautschuk, Synthesekautschuk, Kautschuk ähnlichen Mate¬ rialien oder auch anderen Kunststoffen herstellen.All materials of rubber-like elasticity that are available for technical use can be used to produce clamping pieces according to the invention. In particular, the clamping pieces can be produced from natural rubber, synthetic rubber, rubber-like materials or other plastics.
Im einfachsten Falle lassen sich die Klemmstücke in demjenigen Längenbereich der Schrauben anordnen, welcher zwischen den am Trommelmantel sitzenden Lagerböcken sowie dem radialen Flansch des Fell-Spannreifens frei¬ liegt. Dort können sie dann nämlich ihr drehfestes Widerlager unmittelbar am Außenumfang des Trommelmantels erhalten.In the simplest case, the clamping pieces can be arranged in the length range of the screws which is exposed between the bearing blocks seated on the drum shell and the radial flange of the skin hoop. There you can get your non-rotatable abutment directly on the outer circumference of the drum shell.
Nach der Erfindung ist vorgesehen, daß der Durchbruch in jedem Klemmstück eine kreisförmige Umrißform aufweist und dabei sein Durchmesser den Kerndurchmesser der Schraube nicht unterschreitet. Die Bremskraft an der Schraube wird dabei allein dadurch hervorgerufen, daß die Gewindegänge der Schraube unter elastischer Ver- formung in die Wandungen des Durchbruchs eingreifen.According to the invention it is provided that the opening in each clamping piece has a circular outline shape and its diameter does not fall below the core diameter of the screw. The braking force on the screw is caused solely by the fact that the threads of the screw under elastic intervene in the walls of the opening.
Erfindungsgemäß ist es aber auch möglich, daß die Um¬ rißform des Durchbruchs in den Klemmstücken von der Kreisform abweicht und dabei sein kleinster Öffnungs- querschnitt den Kerndurchmesser der Schraube nicht oder nur unwesentlich unterschreitet. In diesem Falle dringen die Gewindegänge des Schraubenschaftes nur mit begrenz¬ ten Umfangsbereichen unter elastischer Verformung in die Wandungen des Durchbruchs ein, während die übrigen Umfangsbereiche Abstand von den Begrenzungswandungen des Durchbruchs beibehalten.According to the invention, however, it is also possible for the outline shape of the opening in the clamping pieces to deviate from the circular shape, and in this case its smallest opening cross-section not or only insignificantly less than the core diameter of the screw. In this case, the threads of the screw shank penetrate into the walls of the opening only with limited peripheral areas with elastic deformation, while the other peripheral areas maintain a distance from the boundary walls of the opening.
Im Rahmen der Erfindung ist es möglich, den Durchbrüchen in den Klemmstücken eine Vielzahl verschiedener Umri߬ formen zu geben und damit eine Abstimmung auf die unter¬ schiedlichsten Bedürfnisse zu bewirken.Within the scope of the invention it is possible to give the openings in the clamping pieces a multitude of different outline shapes and thus to bring them into line with a wide variety of needs.
Als wichtig hat es sich ferner erwiesen, daß nach der Erfindung der vom Durchbruch entfernte Endabschnitt des Klemmstücks mit einer Stützbasis versehen ist, deren Stützbreite mindestens gleich dem, vorzugsweise jedoch größer als der Abstand des Durchbruchs von dieser Stütz¬ basis bemessen ist. Sinn und Zweck dieser Ausgestal¬ tungsmaßnahme ist dabei die Aufrechterhaltung einer dauerhaft wirksamen S ützVerbindung zwischen jedem Klemmstück und dem ihm benachbarten Umfangsteil des Trommelmantels.It has also proven to be important that, according to the invention, the end section of the clamping piece that is distant from the opening is provided with a support base, the support width of which is at least equal to, but preferably greater than, the distance of the opening from this support base. The purpose of this design measure is to maintain a permanently effective support connection between each clamping piece and the peripheral part of the drum shell that is adjacent to it.
Eine einfache Anpassungsfähigkeit der Klemmstücke an unterschiedliche Krümmungsradien der Trommelmäntel ist erfindungsgemäß dadurch erreichbar, daß die Stützbasis von zwei durch eine Einbuchtung gegeneinander abgegrenz¬ ten Füßen gebildet wird.A simple adaptability of the clamping pieces to different radii of curvature of the drum casing can be achieved according to the invention in that the support base is formed by two feet delimited from one another by an indentation.
Vorteilhaft ist es auch, wenn das Klemmstück mit einer um das Zentrum seines Durchbruchs verlaufenden AbrundungIt is also advantageous if the clamping piece has a rounding extending around the center of its opening
ERSATZBLATT versehen ist, weil hierdurch das einwandfreie Aussehen einer jeden Spannvorrichtung gefördert wird.REPLACEMENT LEAF is provided because this promotes the flawless appearance of each clamping device.
Schließlich sieht die Erfindung auch noch vor, daß die Klemmstücke eine Dicke haben, die zumindest im Bereich des Durchbruchs einem Mehrfachen z. B. dem Vierfachen, der Gewindesteigung der Schraube entspricht, der ge- stalt, daß für den Eingriff des Schraubengewindes eine relativ große Bremsfläche zur Verfügung steht.Finally, the invention also provides that the clamping pieces have a thickness which is at least a multiple z. B. four times the thread pitch of the screw corresponds to the shape that a relatively large braking surface is available for the engagement of the screw thread.
In der Zeichnung ist der Gegenstand der Erfindung in Ausführungsbeispielen dargestellt. Es zeigenIn the drawing, the object of the invention is shown in exemplary embodiments. Show it
Figur 1 in der Draufsicht eine mit Spannvorrich¬ tungen für das für das bzw. die Felle ausgestattete Trommel,FIG. 1 shows a top view of a device equipped with tensioning devices for the drum or skins,
Figur 2 einen Schnitt längs der Linie II-II in Figur 1 etwa in natürlicher Größe durch eine Spannvorrichtung der Trommel,2 shows a section along the line II-II in FIG. 1 approximately in natural size through a tensioning device of the drum,
Figur 3 in weiter vergrößertem Maßstab eine Ansicht in Pfeilrichtung III-III der Figur 2 auf ein wesentliches Element der Spannvor¬ richtung nach Figur 2, während die3 shows, on a further enlarged scale, a view in the direction of arrow III-III of FIG. 2 of an essential element of the tensioning device according to FIG
Figuren 4 bis 10 jeweils der Figur 3 entsprechende Ansichten von abgewandelten Ausführungen des wesent¬ lichen Elementes der Spannvorrichtung wiedergeben.FIGS. 4 to 10 each show views corresponding to FIG. 3 of modified versions of the essential element of the tensioning device.
In den Figuren 1 und 2 der Zeichnung ist als Anwendungs¬ beispiel der Erfindung eine Trommel 1 zu sehen, die einen ringförmigen Mantel 2 aufweist, über dessen eines Ende das Fell 3 gelegt ist. Mit seinen Rändern ist dabei das Fell 3 in einem Streifen 4 befestigt, welcher das obere Ende des Mantels 2 mit konzentrischem Spiel um¬ gibt. Der Reifen 4 hat dabei einen radialen Flansch 5, an dem mehrere, gemäß Figur 1 bspw. acht Spannvor¬ richtungen 6 angreifen, welche gleichmäßig über den Umfang der Trommel 1 verteilt angeordnet sind. Jede Spannvorrichtung 6 hat dabei einen starr an der Außen¬ seite des Trommelmantels 2 sitzenden Lagerbock 7. Ent¬ weder ist in diesen Lagerbock 7 unmittelbar ein Mutter¬ gewinde 8 eingearbeitet, oder aber - bei aufwendigerer Bauart der Spannvorrichtung - ist in den Lagerbock 7 drehfest, aber entgegen der Kraft einer Feder axial verschiebbar eine Gewindebuchse mit entsprechendem Muttergewinde eingesetzt.In FIGS. 1 and 2 of the drawing, a drum 1 can be seen as an application example of the invention, which has an annular casing 2, over one end of which the skin 3 is placed. With its edges is there the skin 3 is fastened in a strip 4 which surrounds the upper end of the jacket 2 with concentric play. The tire 4 has a radial flange 5 on which several, according to FIG. 1 for example eight clamping devices 6 act, which are arranged uniformly distributed over the circumference of the drum 1. Each tensioning device 6 has a bearing block 7 which is rigidly seated on the outer side of the drum shell 2. Either a nut thread 8 is incorporated directly into this bearing block 7, or else — in the case of a more complex construction of the tensioning device — is non-rotatably in the bearing block 7 , but against the force of a spring axially displaceable, a threaded bushing with a corresponding nut thread is used.
Mit dem Muttergewinde 8 steht der Schaft 9 einer Schraube 10 in Eingriff, die in ihrem Kopf 11 bspw. einen radialen Verstellschlitz 12 aufweist. Mit dem Kopf 11 wirkt die Schraube 10 auf die Oberseite des am Reifen 4 vorgesehenen radialen Flansches 5 ein.The shaft 9 of a screw 10 is engaged with the nut thread 8 and has a radial adjustment slot 12 in its head 11, for example. With the head 11, the screw 10 acts on the upper side of the radial flange 5 provided on the tire 4.
Eine Drehung der Schraube 10 mittels eines geeigneten Steckschlüssels führt dazu, daß diese sich mit ihrem Schaft 9 im Muttergewinde 8 axial verlagert, und zwar mit der Folge, daß über den Reifen 4 die Spannung des auf dem einen Ende des Trommelmantels 2 abgestützten Felles 3 verändert werden kann.A rotation of the screw 10 by means of a suitable socket wrench leads to the fact that this shifts axially with its shaft 9 in the nut thread 8, with the result that the tension of the skin 3 supported on one end of the drum shell 2 changes via the tire 4 can be.
Damit sich die Schraube 10 mit ihrem Schaft 9 nicht unbeabsichtigt relativ zum Innengewinde 8 verdrehen und damit verlagern kann, sind im Bereich jeder Spannvor¬ richtung 6 besondere Sicherungsvorkehrungen getroffen.So that the screw 10 with its shaft 9 cannot inadvertently rotate and thus shift relative to the internal thread 8, 6 special safety measures are taken in the area of each clamping device.
Diese SicherungsVorkehrungen bestehen aus einem Klemm¬ stück 13, das einen Durchbruch 14 enthält, welcher unmittelbar vom Gewinde des Schaftes 9 der Schraube 10 durchgriffen ist. Das Klemmstück 13 besteht dabei aus elastomerem Werk¬ stoff, bspw. Kautschuk, Synthesekautschuk oder Kunst¬ stoff. Dabei ist das Klemmstück 13 so gestaltet, daß es entweder am Lagerbock 7, oder aber - wie aus den Figuren 2 und 3 ersichtlich - unmittelbar an dem diesen tragen¬ den Trommelmantel 2 ein drehfestes Widerlager erhält, wenn der Durchbruch 14 vom Schaft 9 der Schraube 10 axial durchsetzt ist. Wichtig ist dabei, daß die klein¬ ste öffnungsweite des Durchbruchs 14 im Klemmstück 13 den Gewinde-Außendurchmesser am Schaft 9 der Schraube 10 unterschreitet; hierdurch wird nämlich erreicht, daß die Gewindegänge des Schraubenschaftes unter elastischer Materialverformung des Klemmstücks 13 in die Wandungen des Durchbruchs 14 eindringen und dadurch einer ständi¬ gen Bremskraft ausgesetzt werden, die eine selbsttätige bzw. unerwünschte Verdrehung der Schraube 10 relativ zur SpannVorrichtung 6 verhindert.These securing arrangements consist of a clamping piece 13 which contains an opening 14 which is penetrated directly by the thread of the shaft 9 of the screw 10. The clamping piece 13 consists of elastomeric material, for example rubber, synthetic rubber or plastic. The clamping piece 13 is designed such that it receives a non-rotatable abutment either on the bearing block 7 or, as can be seen in FIGS. 2 and 3, directly on the drum casing 2 carrying the latter, when the opening 14 is removed from the shaft 9 of the screw 10 is axially penetrated. It is important that the smallest opening width of the opening 14 in the clamping piece 13 falls below the thread outer diameter on the shaft 9 of the screw 10; this means that the threads of the screw shank penetrate into the walls of the opening 14 with elastic material deformation of the clamping piece 13 and are thereby exposed to a constant braking force which prevents the screw 10 from rotating automatically or undesirably relative to the clamping device 6.
Aus Figur 3 ist ersichtlich, daß der vom Durchbruch 14 am weitesten entfernte Endabschnitt des Klemmstücks 13 eine Stützbasis 15 am Trommelmantel 2 bildet, deren Stützbreite mindestens gleich dem, vorzugsweise jedoch größer als der Abstand des Durchbruchs 14 von dieser Stützbasis bemessen ist. Eine drehfeste Lagenfixierung des Klemmstücks 13 gegenüber dem Trommelmantel 2 ist hirdurch dauerhaft gewährleistet.From Figure 3 it can be seen that the most distant end portion of the clamping piece 13 from the opening 14 forms a support base 15 on the drum shell 2, the support width is at least equal to, but preferably greater than the distance of the opening 14 from this support base. A rotationally fixed position fixation of the clamping piece 13 with respect to the drum jacket 2 is thereby permanently ensured.
Damit die Stützbasis 15 sich ohne weiters auch an unter¬ schiedliche Krümmungsradien des Trommelmantels 2 und an unterschiedliche Abstände der Schrauben 10 vom Trommel¬ mantel 2 anpassen kann, ist es zweckmäßig, daß diese von zwei durch eine Einbuchtung 16 gegeneinander abgegrenz¬ ten Füßen 17 und 18 gebildet wird. Diese Ausbildung erlaubt es, das Klemmstück 13 für verschiedenste Größen und Typen von Schlaginstrumenten zu verwenden. Für ein einwandfreies Aussehen des Klemmstückes ist es noch vonSo that the support base 15 can also easily adapt to different radii of curvature of the drum shell 2 and to different distances of the screws 10 from the drum shell 2, it is expedient that these are separated from one another by two feet 17 and 18 is formed. This design allows the clamping piece 13 to be used for a wide variety of sizes and types of percussion instruments. For a perfect appearance of the clamping piece, it is still from
ERSATZBLATT Vorteil wenn dieses mit einer um das Zentrum des Durch¬ bruchs 14 verlaufenden Abrundung 19 versehen ist.REPLACEMENT LEAF Advantage if this is provided with a rounding 19 running around the center of the opening 14.
Die Dicke der Klemmstücke 13 sollte zumindest im Bereich ihres Durchbruchs 14 so bemessen sein, daß sie einem Mehrfachen der Gewindesteigung am Schaft 9 der Schraube 10 entspricht, wobei es sich als vorteilhaft erwiesen hat, diese Dicke mindestens dem Vierfachen der Gewinde¬ steigung anzupassen. Die auf die Gewindeflanken ausge¬ übten Bremskräfte sind dabei so groß, daß die Schraube 10 sich nur unter Benutzung eines geeigneten Verstell¬ schlüssels manipulieren läßt, während eine selbsttätige Verstellung unmöglich ist.The thickness of the clamping pieces 13 should be dimensioned, at least in the area of their opening 14, in such a way that it corresponds to a multiple of the thread pitch on the shaft 9 of the screw 10, it having proven to be advantageous to adapt this thickness to at least four times the thread pitch. The braking forces exerted on the thread flanks are so great that the screw 10 can only be manipulated using a suitable adjustment key, while an automatic adjustment is impossible.
Den Figuren 4 bis 10 läßt sich entnehmen, daß die Aus¬ bildung des Durchbruchs 14 im Klemmstück 13 entsprechend unterschiedlichen Bedürfnissen variiert werden kann.It can be seen from FIGS. 4 to 10 that the formation of the opening 14 in the clamping piece 13 can be varied in accordance with different needs.
In Figur 4 ist bspw. zu sehen, daß der entsprechend der Figur 3 eine kreisförmige Umrißform aufweisende Durch¬ bruch 14 mit Abstand von einem Kranz aus vielen kleinen Rundlöchern 20 umgeben ist, um die Verformungselastizi¬ tät der Wandungen des Durchbruchs 14 zu erhöhen.In FIG. 4 it can be seen, for example, that the opening 14, which has a circular outline in accordance with FIG. 3, is surrounded at a distance by a ring made up of many small round holes 20 in order to increase the elasticity of the walls of the opening 14.
Nach Figur 4 hat der Durchbruch 14 quadratische Umri߬ form, mit der Folge, daß jeweils nur vier begrenzte Umfangsbereiche des Gewindes am Schaft 9 der Schraube 10 unter elastischer Verformung in die Durchbruchswandungen eindringen, während dazwischen liegende Umfangsbereiche von diesem Eingriff freibleiben.According to FIG. 4, the opening 14 has a square outline shape, with the result that only four limited circumferential areas of the thread on the shaft 9 of the screw 10 penetrate the breakthrough walls with elastic deformation, while circumferential areas lying in between remain free from this engagement.
Nach Figur 6 weist der Durchbruch 14 Sechseck-Umrißform auf, während er nach Figur 7 mit Achteck-Umrißform vorhanden ist.According to FIG. 6, the opening 14 has a hexagonal outline, while according to FIG. 7 it is present with an octagonal outline.
Nach den Figuren 8 und 9 weist jeder Durchbruch 14 wieder im wesentlichen kreisförmige Umrißform auf, wobei jedoch an mehreren gleichmäßig verteilt angeordnete Umfangsstellen radial nach einwärts gerichtete Noppen oder Wulste 21 vorhanden sind. Während der größte Durch¬ messer der Durchbrüche 14 nach den Figuren 8 und 9 mindestens dem Außendurchmesser des Schaftes 9 der Schraube 10 entsprechen sollte, können die Noppen oder Wulste 21 so gestaltet werden, daß sie den Durchla߬ querschnitt auf ein Maß einengen, welcher dem Kerndurch¬ messer am Schaft 9 der Schraube 10 entspricht oder diesen sogar noch etwas unterschreitet.According to FIGS. 8 and 9, each opening 14 again has an essentially circular outline, whereby however, at several evenly distributed circumferential locations there are radially inwardly directed knobs or beads 21. While the largest diameter of the openings 14 according to FIGS. 8 and 9 should at least correspond to the outer diameter of the shaft 9 of the screw 10, the knobs or beads 21 can be designed in such a way that they narrow the passage cross section to a dimension which corresponds to that Core diameter on the shaft 9 corresponds to the screw 10 or even falls short of it.
In Figur 10 ist eine aus den Figuren 8 und 9 weiterge¬ bildete Gestaltungsform eines Durchbruchs 14 in einem Klemmstück 13 zu sehen. Hier hat der Durchbruch 14 eine etwa sternförmige Gestalt, die einerseits durch sechs nach einwärts vorspringende Wulste oder Noppen und andererseits durch sechs dazwischengelegene Einbuchtun¬ gen begrenzt ist.FIG. 10 shows a design of an opening 14 in a clamping piece 13 which is further developed from FIGS. 8 and 9. Here, the opening 14 has an approximately star-shaped shape, which is delimited on the one hand by six inwardly projecting beads or knobs and on the other hand by six intervening recesses.
In diesem Falle wird der Durchbruch 14 zweckmäßig so gestaltet, daß seine größte Durchmesser-Abmessung den Außendurchmesser des Gewindes am Schaft 9 der Schraube 10 überschreitet, während der kleinste bzw. freie Durch¬ messer eine kleinere Abmessung hat als der Kerndurch¬ messer des Gewindes am Schaft 9 der Schraube 10. In this case, the opening 14 is expediently designed such that its largest diameter dimension exceeds the outside diameter of the thread on the shaft 9 of the screw 10, while the smallest or free diameter has a smaller dimension than the core diameter of the thread on Shank 9 of screw 10.

Claims

Patentansprüche Claims
1. Spannvorrichtung für die Felle von Schlaginstrumen¬ ten, bestehend aus in am Umfang des Intrumentenman- tels sitzenden Lagerböcken vorgesehenen Gewinden und aus darin verstellbaren sowie an dem das Fell haltenden Reifen angreifenden Schrauben, wobei die Schrauben in jeder Spannstellung relativ zu den Lagerböcken bzw. den darin befindlichen Gewinden selbsttätig festlegbar sind, g e k e n n z e i c h n e t d u r c h , ein Klemmstück (13) aus elastomerem Werkstoff, in dem ein unmittelbar vom Gewinde der Schraube (10) durchgriffener Durchbruch (14) vorgesehen ist, wobei die kleinste öffnungsweite des Durchbruchs1. Tensioning device for the skins of percussion instruments, consisting of threads provided in the bearing blocks on the circumference of the instrument casing and of screws which can be adjusted therein and which act on the tire holding the tire, the screws in each clamping position relative to the bearing blocks or the threads therein can be automatically fixed, characterized by a clamping piece (13) made of elastomeric material, in which an opening (14) directly penetrated by the thread of the screw (10) is provided, the smallest opening width of the opening
(14) den Gewinde-Außendurchmesser der Schraube (10) unterschreitet und wobei das Klemmstück (13) am Lagerbock (7) und/oder unmittelbar an dem diesen tragenden Mantelkörper (2) oder dergleichen des Schlaginstrumentes (1) ein drehfestes Widerlager(14) falls below the thread outer diameter of the screw (10) and the clamping piece (13) on the bearing block (7) and / or directly on the casing body (2) or the like of the percussion instrument (1) carrying the same is a non-rotatable abutment
(15) hat.(15) has.
2. Spannvorrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß der Durchbruch (14) eine kreisförmige Umrißform aufweist und sein Durchmesser den Kerndurchmesser der Schraube (10) nicht unterschreitet.2. Clamping device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the opening (14) has a circular outline shape and its diameter does not fall below the core diameter of the screw (10).
3. Spannvorrichtung nach Anspruch 1 , d a d u r c h g e k e n n z e i c h n e t , daß die Umrißform des Durchbruchs (14) von der Kreisform abweicht und sein kleinster Öffnungs-3. Clamping device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the outline shape of the opening (14) deviates from the circular shape and its smallest opening
ERSATZBLATT querschnitt den Kerndurchmesser der Schraube (10) nicht oder nur unwesentlich unterschreitet.REPLACEMENT LEAF cross section does not, or only insignificantly, falls below the core diameter of the screw (10).
4. Spann Vorrichtung nach einem der Ansprüche 1 bis 3 , d a d u r c h g e k e n n z e i c h n e t , daß der vom Durchbruch (14) entfernte Endabschhitt des Klemmstücks (13) mit einer Stützbasis (15) versehen ist, deren Stützbreite mindestens gleich dem vorzugsweise jedoch größer als der Abstand des Durchbruchs (14) von dieser Stützbasis (15) bemessen ist.4. Clamping device according to one of claims 1 to 3, characterized in that the end section of the clamping piece (13) removed from the opening (14) is provided with a support base (15) whose support width is at least equal to but preferably greater than the distance of the opening (14) is dimensioned from this support base (15).
5. Spannvorrichtung nach Anspruch 4 , d a d u r c h g e k e n n z e i c h n e t , daß die Stützbasis (15) von zwei durch eine Ein¬ buchtung (16) gegeneinander abgegrenzten Füßen (17 und 18) gebildet ist.5. Clamping device according to claim 4, so that the support base (15) is formed by two feet (17 and 18) delimited from one another by an indentation (16).
6. Spannvorrichtung nach einem der Anspruch 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß das Klemmstück (13) mit einer um das Zentrum seines Durchbruchs (14) verlaufenden Abrundung (19) versehen ist.6. Clamping device according to one of claims 1 to 5, so that the clamping piece (13) is provided with a rounding (19) running around the center of its opening (14).
7. Spannvorrichtung nach einem der Ansprüche 1 bis 6, d d u r c h g e k e n n z e i c h n e t , daß die Dicke der Klemmstücke (13) zumindest im Bereich des Durchbruchs (14) einem Mehrfachen, z. B. dem Vierfachen, der Gewindesteigung der Schraube (10) entspricht. 7. Clamping device according to one of claims 1 to 6, that the thickness of the clamping pieces (13) at least in the region of the opening (14) is a multiple, z. B. four times the thread pitch of the screw (10).
PCT/EP1992/000438 1991-03-01 1992-02-28 Device for tensioning the heads of percussion instruments WO1992015984A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4106492A DE4106492C2 (en) 1991-03-01 1991-03-01 Clamping device for the skins of percussion instruments
DEP4106492.5 1991-03-01

Publications (1)

Publication Number Publication Date
WO1992015984A1 true WO1992015984A1 (en) 1992-09-17

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WO (1) WO1992015984A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274735A (en) * 1993-01-27 1994-08-03 Link Johs Sonor Gmbh Drum with damped fixings
WO1994022129A1 (en) * 1993-03-25 1994-09-29 Sonor Johs. Link Gmbh Tensioning device for the head of percussion instruments
EP2784772A3 (en) * 2013-03-26 2015-04-22 Union Seimitsu Co., Ltd. Head fixing mechanism of drum

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4397266B4 (en) * 1993-03-25 2006-03-09 Sonor Gmbh & Co. Kg Tensioning device for head of percussion instruments - has elastomeric clamp arranged in tension device and has multi-sided recess to engage threaded socket enclosing tension screw
JP3707479B2 (en) * 2002-04-26 2005-10-19 ヤマハ株式会社 Drum head tensioning device

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GB819406A (en) * 1956-11-02 1959-09-02 Elastic Stop Nut Corp A nut unit
FR1228099A (en) * 1958-09-18 1960-08-26 Kaynar Company safety or self-locking nuts
DE2017887A1 (en) * 1970-04-14 1971-10-28 Siemens Ag Method for producing an elastically clamping thread and nut body according to the method
GB2017998A (en) * 1978-03-31 1979-10-10 Link Kg J Drum tensioning
GB1556927A (en) * 1976-07-24 1979-12-05 Nippon Musical Instruments Mfg Lug assembly for anchoring drum heads to drum body

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JPH0524953Y2 (en) * 1988-10-20 1993-06-24
JPH0498093U (en) * 1991-01-17 1992-08-25

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Publication number Priority date Publication date Assignee Title
GB819406A (en) * 1956-11-02 1959-09-02 Elastic Stop Nut Corp A nut unit
FR1228099A (en) * 1958-09-18 1960-08-26 Kaynar Company safety or self-locking nuts
DE2017887A1 (en) * 1970-04-14 1971-10-28 Siemens Ag Method for producing an elastically clamping thread and nut body according to the method
GB1556927A (en) * 1976-07-24 1979-12-05 Nippon Musical Instruments Mfg Lug assembly for anchoring drum heads to drum body
GB2017998A (en) * 1978-03-31 1979-10-10 Link Kg J Drum tensioning

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2274735A (en) * 1993-01-27 1994-08-03 Link Johs Sonor Gmbh Drum with damped fixings
GB2274735B (en) * 1993-01-27 1997-04-16 Link Johs Sonor Gmbh Membraphone
WO1994022129A1 (en) * 1993-03-25 1994-09-29 Sonor Johs. Link Gmbh Tensioning device for the head of percussion instruments
GB2282256A (en) * 1993-03-25 1995-03-29 Link Johs Sonor Gmbh Tensioning device for the head of percussion instruments
US5561255A (en) * 1993-03-25 1996-10-01 Sonor Johs. Link Gmbh Tensioning device for the skins of percussion instruments
GB2282256B (en) * 1993-03-25 1996-11-27 Link Johs Sonor Gmbh Tensioning device for the head of percussion instruments
EP2784772A3 (en) * 2013-03-26 2015-04-22 Union Seimitsu Co., Ltd. Head fixing mechanism of drum

Also Published As

Publication number Publication date
DE4106492C2 (en) 1994-03-10
DE4106492A1 (en) 1992-09-03

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