EP2406040B1 - Pipe wrench with an adjustable jaw width - Google Patents
Pipe wrench with an adjustable jaw width Download PDFInfo
- Publication number
- EP2406040B1 EP2406040B1 EP10710257.6A EP10710257A EP2406040B1 EP 2406040 B1 EP2406040 B1 EP 2406040B1 EP 10710257 A EP10710257 A EP 10710257A EP 2406040 B1 EP2406040 B1 EP 2406040B1
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- European Patent Office
- Prior art keywords
- wrench
- section
- grip
- pliers
- jaw
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Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/06—Joints
- B25B7/10—Joints with adjustable fulcrum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B7/00—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools
- B25B7/12—Pliers; Other hand-held gripping tools with jaws on pivoted limbs; Details applicable generally to pivoted-limb hand tools involving special transmission means between the handles and the jaws, e.g. toggle levers, gears
Definitions
- the invention relates to a pipe wrench with adjustable jaw width.
- the pipe wrench has a first pincer part with an outer pincer jaw, a finger-side pincer grip and a lever extension extending therebetween. Furthermore, a second pliers part is provided with an inner pliers jaw and a palm-side pliers handle. Finally, the pipe wrench comprises a pivot pin, which connects the two pliers parts crossing each other.
- Pipe wrenches in various embodiments and purposes are known in the art. Pipe wrenches are by their lever mechanism z. B. unlike Wasserpumpenzangen self-locking. As a result, when the jaw width is set roughly, the two clamp arms no longer have to be pressed together in order to grip the workpiece firmly. To rotate the gripped workpiece only has to be pressed on the ergonomically shaped upper pliers handle, which lies in the palm of the user. Pipe wrenches are usually designed in lengths from 250 to 700 mm and with jaw widths up to 130 mm. A special design used for Maulweiteneingnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagnagna
- the DE 196 03 507 discloses a pipe wrench having two crossing tong legs.
- a support member which is articulated on the first pliers limb and has an internal toothing, an adjustment and locking of the two mutually movable pliers limbs is realized.
- the jaw opening is fixed by the engagement of the internal toothing of the support member in a counter-toothing of the second Pliers leg.
- a disadvantage of this pipe wrench is that to readjust the jaw width, the two gripper handles must be pressed far apart to adjust the pliers in a low-wear manner. Furthermore, the pliers realize no toggle, so that the force is limited to the clamped workpiece.
- a water pump pliers with adjustable mouth width with two crossing pliers, which are rotatably connected by a hinge pin.
- the pliers allow the adjustment and gradual locking of the two pliers parts.
- a slot-shaped opening is provided, which is attached to a pliers part and has a sawtooth-toothed rack.
- the rack toothing is associated with a counter toothing, which is fixedly mounted on the hinge pin.
- the counter-toothing is adjustable in the direction of the course of the crests of the tooth tips against the force of a spring, between a locked and an unlocked position.
- the hinge pin fulfills a dual function as a carrier of the counter-toothing and as a bearing of the two pliers parts.
- EP 0 774 324 B1 is also a water pump pliers described in which a similar device for adjusting and locking the two rotatably mounted pliers parts is used.
- the hinge pin also fulfills the aforementioned dual function here.
- the DE 199 24 664 shows a pair of pliers, which consists of two pliers parts that are adjustable, crossing and connected by a swivel joint.
- a support member In the crossing region of the two pliers parts, a support member is guided on the first pliers part.
- the second pliers part At the fork-shaped side of the support member is the second pliers part articulated by hinge pins.
- a mutual adjustment and gradual locking of the two pliers parts is realized by a locking device.
- a locking element which is located in the pliers handle, is equipped with a toothing, which engages in the sawtooth-toothed rack of the support member.
- the US 6041680 shows a pipe wrench according to the preamble of claim 1.
- the invention is therefore based on the object to provide an improved pipe wrench with quick adjustment, which avoids the disadvantages explained.
- an easy-to-use and low-cost design is sought, which simplifies the technological process in the production of pipe wrench.
- the pipe wrench according to the invention allows a quick and easy adjustment of the jaw width and brings by using a toggle lever high forces on the clamped workpiece, without requiring an excessive expenditure of force by the user. At the same time, the production cost of the pipe wrench is drastically reduced, without the stability of the pliers is deteriorated.
- the pipe wrench according to the invention comprises a first pliers part and a second pliers part, which are crossing and rotatably connected to each other by means of a hinge pin.
- the first pliers part has an outer pliers jaw and a finger-side pliers handle, and an intermediate lever extension with a back-side portion.
- this lever extension runs a first slot, which has an axial orientation.
- the first pliers part has a first offset, which connects the two sections of the lever extension and leads to an axial offset between these two sections.
- the second pliers part has an inner pliers jaw, a palm-side pliers handle and a fürfädelabrough extending therebetween, which lies in the main plane of extension.
- the fürfädelabites provides a fürfädelö réelle that allows the threading of the finger-side pliers handle - and the lever extension of the first pliers part to cross the Zangemaschine.
- An advantage of this embodiment is that the width of the palm of the palm-side forceps handle of the second pliers part need not be limited, since this part does not have to be threaded through the other pliers part, as is common in known pliers. This allows a better power transmission from the user via the palm-side tong grip on the jaw. Furthermore, the arrangement of the fürfädelabitess in the second pliers part is advantageous because the threading of the narrower finger-side pliers handle and the lever extension through the fürfädelö réelle is possible without additional complicated processing processes incurred, such as the spreading and subsequent compression of the fürfädelö réelle. Despite dispensing with such forming processes, both pliers parts can be manufactured in one piece.
- the pipe wrench further comprises a support member which is supported on a handle-side portion of the lever extension of the first pliers part and comprises a locking means.
- the locking means allows a locking or unlocking of the support point of the support member to move the support point along the handle-side portion of the first pliers part.
- the pliers parts In the unlocked position, the pliers parts can be adjusted to each other in the axial direction, so as to achieve a quick preset the jaw width on the workpiece.
- the default setting is advantageously done in one go.
- the locking means is preferably a locking bolt having a toothed portion and a non-toothed portion.
- the toothing on the locking bolt extends, for example, only on an axial portions of the length of the locking bolt, so that between locked and unlocked position can be switched by axial displacement of the locking bolt.
- the unlocking of the lock can be achieved in which the user actuates the lock pin.
- the locking bolt shifts perpendicular to the main extension plane of the pliers in the second slot.
- the unlocked position is maintained as long as the user exerts a force on the locking bolt. If the user releases the locking pin, it returns to the locking position due to a spring force which is advantageously applied to a spring element.
- a spring element may for example be a leaf spring.
- the unlocking of the lock is released, in which the user pivots with one hand, the support member to its backside bearing point.
- the toothing between the locking bolt and the second slot which has only one longitudinal side of a row of teeth in this design dissolves.
- the first pliers part can now be moved in the axial direction to achieve a new adjustment of the mouth width.
- An advantage of this design is the easy setting of the appropriate mouth width (automatic quick release). If the user attaches the pipe wrench to the workpiece at, for example, maximum opening of the jaw opening and lets go of the first pliers part, the toothed region of the locking bolt ratchets past the inner toothing of the second oblong hole. The first pincer part moves downwardly in the axial direction, whereby the workpiece is immediately clamped between the two pincer jaws and the user can start working.
- a quick adjustment of the jaw width is possible. It is advantageous if a slightly larger distance remains between the palm-side forceps handle and the finger-side forceps handle, which allows rapid gripping the palm-side forceps handle.
- This user-friendly grip distance is through a torsion spring supported, which is arranged around the articulation of the support member at a second offset of the second pliers part. In this case, press a first spring leg against the support member and a second against the second crank of the second pliers part.
- the support member has a stop lug which abuts when closing the pipe wrench on the palm-side pliers handle of the second pliers part to ensure a minimum distance between the pliers handles at all jaw opening widths.
- Fig. 1 shows an overview of a first preferred embodiment of a pipe wrench 01.
- the pipe wrench 01 comprises a first pliers part 02 and a second pliers part 20, which in the FIGS. 2 and 3 are shown in detail.
- the first pliers part 02 has an outer pliers jaw 04, a finger-side pliers grip 06 and an extending therebetween lever extension 08, which in turn is divided into a back-side portion 10 and handle-side portion 12. Between the back-side portion 10 and the handle-side portion 12 extends a first crank 13, which causes an axial offset between the two sections 10, 12 ( Fig. 3 ). The first crank 13 extends approximately at an angle of ⁇ 45 ° to the adjacent sections of the lever extension 08.
- first slot 14 In the back-side section 10 of the first pliers part 02 extends in the axial direction, a first slot 14, which assumes a leadership function.
- a hinge pin 16 which extends through the first slot 14 in the first pliers part 02 and through a guide bore 18 in the second pliers part 20, the first pliers part 02 and the second pliers part 20 are interconnected and rotatably connected to each other.
- the pliers parts 02, 20 remain displaceable in the axial direction against each other.
- the second tong part 20 comprises an inner forceps jaw 22, a palm-side forceps handle 24 and a thread-through portion 26 extending therebetween.
- the thread-through portion 26 has a fürfädelö réelle 27, which lies in the main plane of extension of the pliers and between the two dashed lines 27a (FIG. Fig. 2 ). In this area, the thread-through section is thus formed by two opposing material plates, between which the thread-through opening 27 extends.
- the fürfädelö Sharing allows threading through the finger-side pliers handle 06 and the lever extension 08 of the first pliers part 02.
- the finger-side pincer grip 06 has an outer end surface 07, which is oriented perpendicular to the main extension plane and is wider than the remaining portion of the finger-side forceps handle, so that it has a T-shape in cross section.
- a bulge 29 is provided in the back-side portion 10 of the fürfädelö réelle 27, whose free cross-section is greater than that of the fürfädelötechnisch.
- a second crank 28 to which a support member 30 is articulated with its back-side end.
- the second crank 28 is angled relative to the fürfädelabrough 26 about 60 ° to 80 °.
- the articulation can be done for example with a bolt 31.
- the pin 31 Relative to the longitudinal axis of the pliers parts, the pin 31 is located slightly closer to the pliers jaws than the pivot pin 16, about which pivot the pliers parts.
- the bolt 31 is closer to the second pliers jaw 22 than the pivot pin 16.
- a locking means 32 on the handle side portion 12 of the lever extension 08 of the first pliers part 02.
- the locking means 32 formed support point along the handle-side portion 12 variable to move the two pliers 02, 20 axially to each other and thus adjust the jaw width between the two jaws 04, 22.
- a second slot 34 is provided with an internal toothing 36, into which an external toothing of the locking means 32 engages and can be adjusted there in stages.
- the locking means 32 can assume two positions for unlocking or locking the support point of the support member 30 on the grip-side portion 12 of the lever extension.
- the lock can be unlocked by the user operating a locking bolt 38 having a toothed portion and a non-toothed portion disposed along the axis of the locking bolt 38 one behind the other.
- the locking pin 38 shifts perpendicular to the main extension plane of the pliers in the second slot 34, so that the toothed portion of the locking pin out of engagement with the internal teeth 36 in the second slot 34 passes. In this position of the locking bolt re-adjustment of the jaw width can be made.
- a spring element for example a leaf spring 44, is arranged so that its spring force urges the locking bolt 38 into the locking position.
- Fig. 4 shows a schematic representation of a second embodiment of the pipe wrench 01 according to the invention.
- the essential difference from the first embodiment described above lies in the design of the locking means 32 and in the manner of unlocking and locking.
- the lock is unlocked by the user pivoting the support member 30 about the bolt 31 toward the handle-side forceps grip 24 of the second tongue part 20.
- the lock between the locking means 32 and the second slot 34 is released, and the first Zangeteil 02 can be moved in the axial direction.
- the support member 30 is pivoted back by spring force and the toothed portion of the locking means 32 engages in the only one-sided internal toothing of the second elongated hole 34 here.
- Fig. 5 shows three views of the support member 30, as used in the second embodiment of the pipe wrench.
- the support member has a stop lug 47 which abuts when closing the pipe wrench 01 on the palm-side pliers handle 24 of the second pliers part 20.
- the support member has a slightly curved U-shape, each on the backside End and at the handle end has a bore, wherein a first bore 49 for articulation on the second crank 28 of the second pliers member 20 is used and a second bore 50 of the attachment of the locking means 32 is used.
- Fig. 6 a detailed view of the first pliers part 02 used in the second embodiment, which differs from the embodiment described above only in that in the second slot 24 only one-sided internal toothing is mounted.
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- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
- Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
Description
Die Erfindung betrifft eine Rohrzange mit verstellbarer Maulweite. Die Rohrzange besitzt einen ersten Zangenteil mit einer äußeren Zangenbacke, einem fingerseitigen Zangengriff und einer dazwischen verlaufenden Hebelverlängerung. Weiterhin ist ein zweiter Zangenteil mit einer inneren Zangenbacke und einem handballenseitigen Zangengriff vorgesehen. Schließlich umfasst die Rohrzange einen Drehgelenkbolzen, welcher die beiden Zangenteile kreuzend miteinander verbindet.The invention relates to a pipe wrench with adjustable jaw width. The pipe wrench has a first pincer part with an outer pincer jaw, a finger-side pincer grip and a lever extension extending therebetween. Furthermore, a second pliers part is provided with an inner pliers jaw and a palm-side pliers handle. Finally, the pipe wrench comprises a pivot pin, which connects the two pliers parts crossing each other.
Rohrzangen in verschiedenen Ausführungsarten und Zweckbestimmungen sind im Stand der Technik bekannt. Rohrzangen sind durch ihren Hebelmechanismus z. B. im Unterschied zu Wasserpumpenzangen selbstklemmend. Dies führt dazu, dass bei grob eingestellter Maulweite die beiden Zangenarme nicht mehr zusammengedrückt werden müssen, um das Werkstück fest zu greifen. Zum Drehen des gegriffenen Werkstückes muss lediglich auf den dafür ergonomisch geformten oberen Zangengriff gedrückt werden, welcher im Handballen des Benutzers liegt. Rohrzangen sind gewöhnlich in Längen von 250 bis 700 mm und mit Maulweiten bis 130 mm ausgelegt. Eine besondere Bauweise verwendet zur Maulweiteneinstellung das Verschieben eines Zangenschenkels.Pipe wrenches in various embodiments and purposes are known in the art. Pipe wrenches are by their lever mechanism z. B. unlike Wasserpumpenzangen self-locking. As a result, when the jaw width is set roughly, the two clamp arms no longer have to be pressed together in order to grip the workpiece firmly. To rotate the gripped workpiece only has to be pressed on the ergonomically shaped upper pliers handle, which lies in the palm of the user. Pipe wrenches are usually designed in lengths from 250 to 700 mm and with jaw widths up to 130 mm. A special design used for Maulweiteneinstellung moving a pliers limb.
Die
Aus der
In der
Die
Die
Der Erfindung liegt daher die Aufgabe zugrunde, eine verbesserte Rohrzange mit Schnellverstellung bereitzustellen, welche die erläuterten Nachteile vermeidet. Insbesondere wird eine bedienungsfreundliche und fertigungsgünstigere Bauform angestrebt, die den technologischen Ablauf bei der Herstellung der Rohrzange vereinfacht.The invention is therefore based on the object to provide an improved pipe wrench with quick adjustment, which avoids the disadvantages explained. In particular, an easy-to-use and low-cost design is sought, which simplifies the technological process in the production of pipe wrench.
Erfindungsgemäß wird die Aufgabe durch die Merkmale der Rohrzange gemäß dem beigefügten Anspruch 1 gelöst.According to the invention the object is achieved by the features of the pipe wrench according to the appended claim 1.
Die erfindungsgemäße Rohrzange ermöglicht eine schnelle und unkomplizierte Einstellung der Maulweite und bringt durch Nutzung einer Kniehebelanordnung hohe Kräfte am eingespannten Werkstück auf, ohne dass es dafür eines übermäßigen Kraftaufwands durch den Benutzer bedarf. Gleichzeitig wird der Herstellungsaufwand der Rohrzange drastisch verringert, ohne dass die Stabilität der Zange verschlechtert wird.The pipe wrench according to the invention allows a quick and easy adjustment of the jaw width and brings by using a toggle lever high forces on the clamped workpiece, without requiring an excessive expenditure of force by the user. At the same time, the production cost of the pipe wrench is drastically reduced, without the stability of the pliers is deteriorated.
Die erfindungsgemäße Rohrzange umfasst einen ersten Zangenteil und einen zweiten Zangenteil, die kreuzend und drehbar miteinander mittels eines Gelenkbolzens verbunden sind. Der erste Zangenteil weist eine äußere Zangenbacke und einen fingerseitigen Zangengriff auf, und eine dazwischen verlaufenden Hebelverlängerung mit einem backenseitigen Abschnitt. In dieser Hebelverlängerung verläuft ein erstes Langloch, das eine axiale Ausrichtung hat. Des Weiteren weist das erste Zangenteil eine erste Kröpfung auf, welche die beiden Abschnitte der Hebelverlängerung verbindet und zu einem Axialversatz zwischen diesen beiden Abschnitten führt.The pipe wrench according to the invention comprises a first pliers part and a second pliers part, which are crossing and rotatably connected to each other by means of a hinge pin. The first pliers part has an outer pliers jaw and a finger-side pliers handle, and an intermediate lever extension with a back-side portion. In this lever extension runs a first slot, which has an axial orientation. Furthermore, the first pliers part has a first offset, which connects the two sections of the lever extension and leads to an axial offset between these two sections.
Der zweite Zangenteil besitzt eine innere Zangenbacke, einen handballenseitigen Zangengriff und einen dazwischen verlaufenden Durchfädelabschnitt, welcher in der Haupterstreckungsebene liegt. Der Durchfädelabschnitt stellt eine Durchfädelöffnung bereit, die das Durchfädeln des fingerseitigen Zangengriffs - und der Hebelverlängerung des ersten Zangenteils gestattet, um die Zangeteile zu kreuzen.The second pliers part has an inner pliers jaw, a palm-side pliers handle and a Durchfädelabschnitt extending therebetween, which lies in the main plane of extension. The Durchfädelabschnitt provides a Durchfädelöffnung that allows the threading of the finger-side pliers handle - and the lever extension of the first pliers part to cross the Zangeteile.
Ein Vorteil dieser Ausführungsform ist, dass die Breite der Handballenfläche des handballenseitigen Zangengriffs des zweiten Zangenteils nicht beschränkt werden muss, da dieser Teil nicht durch den anderen Zangenteil durchgefädelt werden muss, wie es bei bekannten Rohzangen üblich ist. Dies ermöglicht eine bessere Kraftübertragung vom Benutzer über den handballenseitigen Zangengriff auf die Zangenbacke. Des Weiteren ist die Anordnung des Durchfädelabschnitts in dem zweiten Zangenteil vorteilhaft, da das Einfädeln des schmaler ausgelegten fingerseitigen Zangengriffs und der Hebelverlängerung durch die Durchfädelöffnung möglich wird, ohne dass zusätzliche komplizierte Verarbeitungsprozesse anfallen, wie beispielsweise das Aufspreizen und nachfolgende das Zusammenpressen der Durchfädelöffnung. Trotz Verzicht auf solche Umformprozesse können beide Zangenteile einstückig hergestellt werden.An advantage of this embodiment is that the width of the palm of the palm-side forceps handle of the second pliers part need not be limited, since this part does not have to be threaded through the other pliers part, as is common in known pliers. This allows a better power transmission from the user via the palm-side tong grip on the jaw. Furthermore, the arrangement of the Durchfädelabschnitts in the second pliers part is advantageous because the threading of the narrower finger-side pliers handle and the lever extension through the Durchfädelöffnung is possible without additional complicated processing processes incurred, such as the spreading and subsequent compression of the Durchfädelöffnung. Despite dispensing with such forming processes, both pliers parts can be manufactured in one piece.
Die Rohrzange weist weiterhin ein Stützglied auf, das sich an einem griffseitigen Abschnitt der Hebelverlängerung des ersten Zangenteils abstützt und ein Arretierungsmittel umfasst. Das Arretierungsmittel ermöglicht eine Verriegelung bzw. Entriegelung des Abstützpunkts des Stützgliedes, um den Abstützpunkt längs des griffseitigen Abschnitts des ersten Zangenteils zu verschieben.The pipe wrench further comprises a support member which is supported on a handle-side portion of the lever extension of the first pliers part and comprises a locking means. The locking means allows a locking or unlocking of the support point of the support member to move the support point along the handle-side portion of the first pliers part.
In der entriegelten Position lassen sich die Zangenteile zueinander in axialer Richtung verstellen, um so eine schnelle Voreinstellung der Maulweite am Werkstück zu erreichen. Dabei erfolgt die Voreinstellung vorteilhaft in einem Zug.In the unlocked position, the pliers parts can be adjusted to each other in the axial direction, so as to achieve a quick preset the jaw width on the workpiece. The default setting is advantageously done in one go.
In der verriegelten Position kann keine gegenseitige Verstellung der beiden Zangenteile erfolgen und die Voreinstellung ist für den Arbeitsprozess gesichert.In the locked position, no mutual adjustment of the two pliers parts can take place and the default setting is ensured for the working process.
Das Arretierungsmittel ist vorzugsweise ein Verriegelungsbolzen, der einen verzahnten Bereich und einen unverzahnten Bereich aufweist. Bei der Arretierung greift die Verzahnung des Verriegelungsbolzens in die Gegenverzahnung eines zweiten Langlochs im griffseitigen Abschnitt der Hebelverlängerung des ersten Zangeteils ein. Die Verzahnung auf dem Verriegelungsbolzen erstreckt sich beispielsweise nur auf einem axialen Abschnitte der Länge des Verriegelungsbolzens, sodass zwischen verriegelter und entriegelter Position durch axiale Verschiebung des Verriegelungsbolzens umgeschaltet werden kann. In einer weiter bevorzugten Ausführungsform kann die Entriegelung der Arretierung gelöst werden in dem der Benutzer den Verriegelüngsbolzen betätigt. Dabei verschiebt sich der Verriegelungsbolzen senkrechte zur Haupterstreckungsebene der Zange im zweiten Langloch. Die entriegelte Position wird solange beibehalten, wie der Benutzer eine Kraft auf den Verriegelungsbolzen ausübt. Gibt der Benutzer den Verriegelungsbolzen frei, kehrt diese in die Verriegelungsposition zurück, aufgrund einer von Vorteil einem Federelement aufgebrachten Federkraft. So ein Federelement kann beispielsweise eine Blattfeder sein.The locking means is preferably a locking bolt having a toothed portion and a non-toothed portion. When locking the teeth of the locking pin engages in the counter-toothing of a second slot in the handle-side portion of the lever extension of the first Zangeteils. The toothing on the locking bolt extends, for example, only on an axial portions of the length of the locking bolt, so that between locked and unlocked position can be switched by axial displacement of the locking bolt. In a further preferred embodiment, the unlocking of the lock can be achieved in which the user actuates the lock pin. The locking bolt shifts perpendicular to the main extension plane of the pliers in the second slot. The unlocked position is maintained as long as the user exerts a force on the locking bolt. If the user releases the locking pin, it returns to the locking position due to a spring force which is advantageously applied to a spring element. Such a spring element may for example be a leaf spring.
In einer weiter vorteilhaften Ausführungsform wird die Entriegelung der Arretierung gelöst, in dem der Benutzer mit einer Hand das Stützglied um seinen backenseitigen Lagerpunkt verschwenkt. Dabei löst sich die Verzahnung zwischen Verriegelungsbolzen und dem zweiten Langloch, welches bei dieser Bauform nur an einer Längsseite eine Zahnreihe besitzt. Der erste Zangenteil kann nun in axialer Richtung verschoben werden, um eine neue Einstellung der Maulweite zu erreichen. Ein Vorteil dieser Ausführung besteht in der leichten Einstellung der passenden Maulweite (automatischer Schnellverschluss). Wenn der Benutzer bei beispielsweise maximaler Öffnung der Maulweite die Rohrzange an das Werkstück ansetzt und das erste Zangenteil los lässt, ratscht der verzahnte Bereich des Verriegelungsbolzens an der Innenverzahnung des zweiten Langlochs vorbei. Der erste Zangenteil bewegt sich in axialer Richtung nach unten, wodurch das Werkstück sofort zwischen den zwei Zangenbacken eingeklemmt wird und der Benutzer mit der Arbeit beginnen kann.In a further advantageous embodiment, the unlocking of the lock is released, in which the user pivots with one hand, the support member to its backside bearing point. In this case, the toothing between the locking bolt and the second slot, which has only one longitudinal side of a row of teeth in this design dissolves. The first pliers part can now be moved in the axial direction to achieve a new adjustment of the mouth width. An advantage of this design is the easy setting of the appropriate mouth width (automatic quick release). If the user attaches the pipe wrench to the workpiece at, for example, maximum opening of the jaw opening and lets go of the first pliers part, the toothed region of the locking bolt ratchets past the inner toothing of the second oblong hole. The first pincer part moves downwardly in the axial direction, whereby the workpiece is immediately clamped between the two pincer jaws and the user can start working.
Mit der erfindungsgemäßen Rohrzange ist eine schnelle Verstellung der Maulweite möglich. Dabei ist es von Vorteil, wenn zwischen dem handballenseitige Zangengriff und dem fingerseitigen Zangengriff ein etwas größerer Abstand verbleibt, der dass schnelle Greifen des handballenseitigen Zangengriffs ermöglicht. Dieser benutzerfreundliche Griffabstand wird durch eine Drehfeder unterstütz, die um die Anlenkung des Stützgliedes an einer zweiten Kröpfung des zweiten Zangenteils angeordnet ist. Dabei drücken ein erster Federschenkel gegen das Stützglied und ein zweiter gegen die zweite Kröpfung des zweiten Zangenteils. Durch Schließen der Rohrzange wird die Drehfeder gespannt und durch Loslassen eines der beiden Zangenteile, entspannt sich die Drehfeder und es stellt sich ein nutzerfreundlicher Abstand zwischen beiden Zangengriffen ein.With the pipe wrench according to the invention a quick adjustment of the jaw width is possible. It is advantageous if a slightly larger distance remains between the palm-side forceps handle and the finger-side forceps handle, which allows rapid gripping the palm-side forceps handle. This user-friendly grip distance is through a torsion spring supported, which is arranged around the articulation of the support member at a second offset of the second pliers part. In this case, press a first spring leg against the support member and a second against the second crank of the second pliers part. By closing the pipe wrench the torsion spring is tensioned and by releasing one of the two pliers parts, the torsion spring relaxes and sets a user-friendly distance between the two pliers handles.
In einer weitern bevorzugten Ausführungsform weist das Stützglied eine Anschlagnase auf, die beim Schließen der Rohrzange an dem handballenseitigen Zangengriff des zweiten Zangenteils anschlägt, um bei allen Maulöffnungsweiten einen Mindestabstand zwischen den Zangengriffen sicherzustellen.In a further preferred embodiment, the support member has a stop lug which abuts when closing the pipe wrench on the palm-side pliers handle of the second pliers part to ensure a minimum distance between the pliers handles at all jaw opening widths.
Besonders bevorzugte Ausführungsformen der Erfindung sind in den Figuren dargestellt und werden nachfolgend näher erläutert. Es zeigen:
- Fig. 1:
- eine Darstellung einer ersten Ausführungsform einer erfindungsgemäßen Rohrzange;
- Fig. 2:
- eine Detaildarstellung eines zweiten Zangenteils;
- Fig. 3:
- eine Detaildarstellung eines ersten Zangenteils;
- Fig. 4:
- eine Darstellung einer zweiten Ausführungsform der erfindungsgemäßen Rohrzange;
- Fig. 5:
- eine Detaildarstellung eines Stützgliedes der zweiten Ausführungsform in drei Ansichten;
- Fig. 6:
- eine Detaildarstellung des ersten Zangenteils der zweiten Ausführungsform.
- Fig. 1:
- a representation of a first embodiment of a pipe wrench according to the invention;
- Fig. 2:
- a detailed view of a second pliers part;
- 3:
- a detailed view of a first pliers part;
- 4:
- a representation of a second embodiment of the pipe wrench according to the invention;
- Fig. 5:
- a detailed view of a support member of the second embodiment in three views;
- Fig. 6:
- a detailed view of the first pliers part of the second embodiment.
Der erste Zangenteil 02 besitzt eine äußere Zangenbacke 04, einen fingerseitigen Zangengriff 06 und eine dazwischen verlaufende Hebelverlängerung 08, die ihrerseits in einen backenseitigen Abschnitt 10 und griffseitigen Abschnitt 12 unterteilt ist. Zwischen dem backenseitigen Abschnitt 10 und dem griffseitigen Abschnitt 12 verläuft eine erste Kröpfung 13, die einen axialen Versatz zwischen den beiden Abschnitten 10, 12 bewirkt (
Im backenseitigen Abschnitt 10 des ersten Zangenteils 02 verläuft in axialer Richtung ein erstes Langloch 14, das eine Führungsfunktion übernimmt. Mittels eines Drehgelenkbolzens 16, welcher sich durch das erste Langloch 14 im ersten Zangenteil 02 und durch eine Führungsbohrung 18 im zweiten Zangenteil 20 erstreckt, werden der erste Zangenteil 02 und der zweite Zangenteil 20 kreuzend und drehbar miteinander verbunden. Die Zangenteile 02, 20 bleiben in axialer Richtung gegeneinander verschiebbar.In the back-
Der zweite Zangenteil 20 umfasst eine innere Zangenbacke 22, einen handballenseitigen Zangengriff 24 und einen dazwischen verlaufenden Durchfädelabschnitt 26. Der Durchfädelabschnitt 26 weist eine Durchfädelöffnung 27 auf, welche in der Haupterstreckungsebene der Zange liegt und sich zwischen den beiden gestrichelten Linien 27a (
Der fingerseitige Zangengriff 06 weist eine äußere Stirnfläche 07 auf, die senkrecht zu der Haupterstreckungsebene ausgerichtet ist und breiter als der verbleibende Abschnitt des fingerseitigen Zangengriffs ist, sodass dieser im Querschnitt eine T-Form besitzt. Um den Durchfädelvorgang zu ermöglichen, ist eine Ausbuchtung 29 im backenseitigen Abschnitt 10 der Durchfädelöffnung 27 vorgesehen, deren freier Querschnitt größer ist als derjenige der Durchfädelöffnung.The finger-
Zwischen dem Durchfädelabschnitt 26 und der inneren Zangebacke 22 verläuft eine zweite Kröpfung 28, an welcher ein Stützglied 30 mit seinem backenseitigen Ende angelenkt ist. Die zweite Kröpfung 28 ist gegenüber dem Durchfädelabschnitt 26 etwa um 60° bis 80° abgewinkelt. Die Anlenkung kann z.B. mit einem Bolzen 31 erfolgen. Bezogen auf die Längsachse der Zangenteile befindet sich der Bolzen 31 etwas näher an den Zangenbacken als der Drehgelenkbolzen 16, um welchen die Zangenteile schwenken. Bezogen auf den zweiten Zangenteil 20 befindet sich der Bolzen 31 näher an der zweiten Zangenbacke 22 als der Drehgelenkbolzen 16. Am griffseitigen Ende des Stützgliedes 30 ist dieses über ein Arretierungsmittel 32 am griffseitigen Abschnitt 12 der Hebelverlängerung 08 des ersten Zangenteils 02 abgestützt. Wenn das Arretierungsmittel durch Betätigung entriegelt wird, ist der durch das Arretierungsmittel 32 gebildete Abstützpunkt längs des griffseitigen Abschnitts 12 veränderlich, um die beiden Zangenteile 02, 20 axial zueinander zu verschieben und damit die Maulweite zwischen den beiden Zangenbacken 04, 22 einzustellen. Dafür ist längs des griffseitigen Abschnitts 12 des ersten Zangenteils 02 ein zweites Langloch 34 mit einer Innenverzahnung 36 vorgesehen, in welche eine Außenverzahnung des Arretierungsmittels 32 eingreift und dort stufenweise verstellt werden kann.Between the
Durch die beschriebene Anordnung des Drehgelenks 16, 18 und des Bolzens 31 wird im Zusammenspiel mit der Formgebung der Zangenteile eine Kniehebelanordnung erreicht, welche eine große Krafteinleitung zum Festklemmen des Werkstücks im Zangenmaul gestattet.Due to the described arrangement of the rotary joint 16, 18 and the
Das Arretierungsmittel 32 kann zwei Positionen einnehmen, zur Entriegelung bzw. Verriegelung des Abstützpunktes des Stützgliedes 30 am griffseitigen Abschnitt 12 der Hebelverlängerung.The locking means 32 can assume two positions for unlocking or locking the support point of the
Bei der in den
Zur Arretierung des Abstützpunktes des Stützgliedes 30 greift der verzahnte Bereich des Verriegelungsbolzens 38 in die Innenverzahnung des zweiten Langlochs 34 ein und die Voreinstellung der Maulweite ist gesichert. Um die Verriegelungsposition aufrecht zu halten, ist ein Federelement, beispielsweise eine Blattfeder 44 so angeordnet, dass seine Federkraft den Verriegelungsbolzen 38 in die Verriegelungsposition drängt.To lock the support point of the
In der zweiten Ausführungsform wird die Arretierung entriegelt, indem der Benutzer das Stützglied 30 um den Bolzen 31 in Richtung zum handballenseitigen Zangengriff 24 des zweiten Zungenteils 20 verschwenkt. Dabei löst sich die Verriegelung zwischen dem Arretierungsmittel 32 und dem zweiten Langloch 34, und der erste Zangeteil 02 kann in axialer Richtung verschoben werden. Mit Wegfall des Fingerdrucks auf das Stützglied 30 wird das Stützglied 30 durch Federkraft zurück geschwenkt und der verzahnte Bereich des Arretierungsmittels 32 greift in die hier nur einseitige Innenverzahnung des zweiten Langloches 34 ein.In the second embodiment, the lock is unlocked by the user pivoting the
- 0101
- Rohrzangepipe wrench
- 0202
- erster Zangenteilfirst pliers part
- 0404
- äußere Zangenbackeouter jaw
- 0606
- fingerseitiger ZangengriffFinger-side pincer grip
- 0707
- Stirnflächeface
- 0808
- Hebelverlängerunglever extension
- 1010
- backenseitiger Abschnittbackside section
- 1212
- griffseitiger Abschnitthandle-side section
- 1313
- erste Kröpfungfirst bend
- 1414
- erstes Langlochfirst slot
- 1616
- DrehgelenkbolzenHinge pin
- 1818
- Führungsbohrungguide bore
- 2020
- zweiter Zangenteilsecond pliers part
- 2222
- innere Zangenbackeinner jaw
- 2424
- handballenseitiger ZangengriffPalm-side forceps handle
- 2626
- DurchfädelabschnittDurchfädelabschnitt
- 2727
- DurchfädelöffnungDurchfädelöffnung
- 2828
- zweite Kröpfungsecond bend
- 2929
- Ausbuchtungbulge
- 3030
- Stützgliedsupporting member
- 3131
- Bolzenbolt
- 3232
- Arretierungsmittellocking
- 3434
- zweites Langlochsecond slot
- 3636
- Innenverzahnunginternal gearing
- 3838
- Verriegelungsbolzenlocking bolt
- 4444
- Blattfederleaf spring
- 4747
- Anschlagnasestop lug
- 4949
- erste Bohrungfirst hole
- 5050
- zweite Bohrungsecond hole
Claims (11)
- A pipe wrench (01) with an adjustable mouth opening, comprising:- a first part of the wrench (02) with an outer wrench jaw (04), a finger-side wrench grip (06) and a lever extension (08) running between them, with a jaw-side section (10), in which a first elongated hole (14) runs axially, and with an axially-offset, grip-side section (12) adjoining via a first cranked section (13);- a second part of the wrench (20) with an inner wrench jaw (22), a heel of the hand-side wrench grip (24) and a feed-through section (26) running between them, which possesses a feed-through opening (27) located in the main extension plane, which permits the feed through of the finger-side wrench grip (06) and the lever extension (08) of the first part of the wrench (02);- a swivel joint pin (16), which extends through the first elongated hole (14) in the first part of the wrench (02), and through a guide bore (18) in the feed-through section (26) of the second part of the wrench (20), so as to connect the two parts of the wrench with one another such that they cross over;- a support element (30), characterised in that, at its jaw-side end the support element is hinged on a second cranked section (28) running between the feed-through section (26) and the inner wrench jaw (22), and at its grip-side end it is supported by means of a locking agent (32) on the grip-side section (12) of the lever extension (08) of the first part of the wrench (02), wherein the support point of the support element (30) can be moved along the grip-side section (12) so as to displace the two parts of the wrench (02, 20) axially relative to one another, and thereby adjust the mouth opening between the two wrench jaws (04, 22).
- The pipe wrench in accordance with claim 1, characterised in that the locking agent (32) can be moved in a second elongated hole (34), which runs axially in the grip-side section (12) of the lever extension (08), and can be adjusted between a locked and an unlocked position.
- The pipe wrench in accordance with claim 2, characterised in that, the locking agent (32) comprises a locking pin (38), which along its axis has a toothed and an untoothed region, located one behind another, wherein in the locked position the toothed region engages with internal teeth (36) in the second elongated hole (34), and wherein by means of axial displacement of the locking pin (38) the interlocking teeth are disengaged.
- The pipe wrench in accordance with claim 2, characterised in that the locking agent (32) comprises a locking pin (38), which has a toothed and an untoothed region, which are arranged on opposing peripheral sections, wherein by pivoting the support element (32) out of a single-sided set of teeth (36) in the second elongated hole (34) the toothed region can be disengaged.
- The pipe wrench in accordance with one of the claims 1 to 4, characterised in that the feed-through opening (27) possesses a clearance that is larger than the thickness of the finger-side wrench grip (06), such that the latter can be fed through without any deformation of the jaw-side section (10).
- The pipe wrench in accordance with one of the claims 1 to 5, characterised in that the finger-side wrench grip (06) has an outer end surface (07), which is wider than the other section of the finger-side wrench grip (06), and in that an indent (29) is provided in the jaw-side section (10) of the feed-through opening (27), the open cross-section of which corresponds to the cross-section of the end surface (07).
- The pipe wrench in accordance with one of the claims 1 to 6, characterised in that the support element (30) has a spring element (44), the force of which acts on to the locking agent (32) so as to push the latter into a locking position.
- The pipe wrench in accordance with one of the claims 1 to 7, characterised in that a coiled spring is clamped between the support element (30) and the second cranked section (28) of the second part of the wrench (20), which spring causes the mouth of the pipe wrench (01) to open.
- The pipe wrench in accordance with claim 4, characterised in that the support element (30) has a stop nose (47), which abuts against the second part of the wrench (20) as the pipe wrench (01) is closed.
- The pipe wrench in accordance with one of the claims 1 to 9, characterised in that each of the two parts of the wrench (02, 20) is designed in one piece.
- The pipe wrench in accordance with one of the claims 1 to 10, characterised in that the hinge point (31) of the support element (30) on the second cranked section (28) running between the feed-through section (26) and the inner wrench jaw (22) in the direction of the longitudinal axis of the wrench parts is arranged nearer to the wrench jaws (02, 20) than the swivel joint pin (16).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009001497 | 2009-03-11 | ||
PCT/EP2010/052928 WO2010102986A1 (en) | 2009-03-11 | 2010-03-08 | Pipe wrench with an adjustable jaw width |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2406040A1 EP2406040A1 (en) | 2012-01-18 |
EP2406040B1 true EP2406040B1 (en) | 2016-05-04 |
Family
ID=42154421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10710257.6A Active EP2406040B1 (en) | 2009-03-11 | 2010-03-08 | Pipe wrench with an adjustable jaw width |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2406040B1 (en) |
PL (1) | PL2406040T3 (en) |
WO (1) | WO2010102986A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108789197B (en) * | 2017-04-28 | 2024-09-03 | 杭州巨星科技股份有限公司 | Opening and closing device |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3303369A1 (en) | 1983-02-02 | 1984-08-02 | Knipex-Werk C. Gustav Putsch, 5600 Wuppertal | Waterpump pliers |
DE9113870U1 (en) * | 1991-08-08 | 1992-12-10 | Knipex-Werk C. Gustav Putsch, 5600 Wuppertal | Pliers with two jaws |
DE19603507A1 (en) | 1996-02-01 | 1997-08-07 | Gedore Werkzeugfab O Dowidat | Pipe wrench or corner work pipe wrench |
DE29806998U1 (en) * | 1998-04-17 | 1998-07-02 | Wang, Jan Hel, Da Li, Taichung | Clamping tool |
US6041680A (en) * | 1998-11-24 | 2000-03-28 | Wang; Yen-Yu | Pincers |
DE19924664A1 (en) | 1999-05-28 | 2000-11-30 | Lothar Bludszus | Adjustable wrench, e.g. pipe wrench; has saw-toothed rod and spring-biased corresponding toothed comb that can be displaced along each other with locking element to secure wrench at desired setting |
-
2010
- 2010-03-08 WO PCT/EP2010/052928 patent/WO2010102986A1/en active Application Filing
- 2010-03-08 EP EP10710257.6A patent/EP2406040B1/en active Active
- 2010-03-08 PL PL10710257.6T patent/PL2406040T3/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO2010102986A1 (en) | 2010-09-16 |
PL2406040T3 (en) | 2016-10-31 |
EP2406040A1 (en) | 2012-01-18 |
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