EP1527847B1 - Clamping tool - Google Patents

Description

The invention relates to a clamp-type hand tool comprising a first leg with a jaw part, a second leg with a jaw part, wherein the two legs are pivotable relative to each other and the jaw parts form a mouth with adjustable opening width, and the jaw part of the first leg and / or of the second leg is displaceable on the associated leg, and a slide rail for the displaceable jaw part, wherein the displaceable jaw part is designed as a slide bar, which is guided on the slide rail and the slide bracket is releasably fixable via a clamping force on the slide rail.

Clamping hand tools comprising a first leg with a jaw part and a second leg with a jaw part, wherein the two legs are pivotable relative to each other and the jaw parts form an adjustable opening jaw, are used to clamp one or more workpieces and in particular in the Keep your mouth clamped. They are also referred to as glue clamp or spring clamp. They are especially one-hand operable.

From the US 4,834,352 a spring clamp for clamping a workpiece is known which comprises a lower clamp and an upper clamp. The clamping brackets each have a rear area, which forms a handle element in each case. The corresponding first grip element and second grip element are pivotally connected to each other. The upper clamp comprises a slide-hold device which extends perpendicular to the associated second handle element. An L-shaped bracket element is guided on the sliding-holding device.

The invention has for its object to improve a terminal-hand tool of the type mentioned so that it can be used in the most universal way possible.

This object is achieved by a clamp-type hand tool according to claim 1.

Due to the displaceability of the jaws or on the one or more associated legs results in a further adjustment for the terminal hand tool; the opening width can be adjusted relative to one another via the pivoting position of the two legs and additionally or alternatively via the displacement position of the jaw part or parts on the associated limb (s).

Clamp hand tools known from the prior art have the disadvantage that the clamping force which acts on a clamped workpiece is dependent on the opening width of the jaw. Usually, the clamping force is smaller with smaller opening widths than with larger opening widths; This is due to the force-strain characteristics of commonly used springs that cause the clamping force. Since, in the solution according to the invention, the opening width can also be set via the displacement position of the jaw part or parts, the force exerted on a clamped workpiece can thus also be set. Thus, for example, with a given opening width, a certain force acting on the workpiece can be set. In an analogous manner, a certain clamping force for different opening widths can be achieved.

By the solution according to the invention an additional adjustment is given, via which can be dosed the clamping force. This additional adjustment can be realized in a structurally simple way.

It can also be adjusted while maintaining the size of handle parts - and thus one-handed operability - set by the at least one movable jaw part an opening width of the mouth in a wider span range. In particular, opening widths can be adjusted, as they only known from no longer one-hand operable terminals or clamps.

A displaceability of a jaw part can be realized in a simple manner if a slide rail is provided for the displaceable jaw part. Such a slide can be produced in a simple manner to realize a displacement guide. Furthermore, the displacement of the corresponding jaw part can be operated in a simple manner.

The displaceable jaw part is designed as a sliding bar, which is guided on the slide rail. As a result, a displacement guide can be realized in a simple manner, wherein a specific displacement position can be detected in particular.

A detectability can be realized in a simple manner, when the sliding bar is releasably fixed on a clamping force on the slide rail. The clamping force holds the slide bar in a set displacement position so that it can only be moved when the clamping force is released. To solve the clamping force, a force is preferably required, the force direction is transverse to the direction of displacement.

A clamping force can be realized in a simple manner if one or more elastic elements (spring elements) are provided in order to hold the sliding bar on the slide rail. By means of elastic elements, in addition to the fixation in a displacement position, it is also possible for the sliding bar to be pressed from a transitional phase during the displacement into a holding position in which it sits substantially free of play.

At least one resilient tongue element is provided, which presses the sliding bar against the slide rail and thus presses a contact element into a receptacle. Preferably, the tongue element exerts a normal force and a force along the direction of displacement. As a result, the sliding bar can be pressed into a substantially play-free holding position and held in this.

The at least one tongue element is arranged on the slide bracket and formed integrally on the slide bracket. If the sliding bar is made of a plastic material, then a corresponding tongue element can easily be molded in one piece.

In particular, the displaceable jaw part is displaceable away from the other jaw part or is displaceable on the other jaw part. The distance between the displaceable jaw part and a pivot bearing for the two legs is adjustable. In this way, the opening width of the mouth via displacement of the jaws or is adjustable.

In addition or as an alternative to adjusting the opening width over a specific pivoting position of the two legs, an opening width of the jaw can then be adjusted via the displaceable jaw part, wherein the clamping force exerted on a clamped workpiece is adjustable.

In the solution according to the invention, the clamping force on one or more workpieces, which are clamped in the jaw, can be adjusted via the displaceable jaw part. As a result, the force that is exerted on one or more workpieces, dosed.

It is advantageous if the jaw part is lockably guided on the associated leg. As a result, defined opening widths can be set, wherein the position of the jaw part is fixedly fixed to the associated leg.

Conveniently, a displacement direction of the displaceable jaw part is transverse and in particular perpendicular to a pivot axis for the first leg and second leg. This way you can easily set an opening width via a shift position of the sliding jaw part (s).

For the same reason, it is favorable if a displacement direction of the displaceable jaw part is transverse and in particular perpendicular to a longitudinal direction of a handle part of the associated leg.

Conveniently, the slide rail extends transversely and in particular perpendicular to a handle portion of the associated leg. As a result, the jaw part can be moved in a direction transversely and in particular perpendicular to the handle part.

In particular, it is provided that the slide rail is connected to a handle portion of the associated leg. The connection may be in one piece or it may be separate components that are subsequently fixed together. About the handle part can be (in conjunction with a handle portion of the other leg) reach a certain pivot position of the legs to adjust an opening width of the mouth. By positioning the jaw part on the slide rail, this opening width can be varied or it can be adjusted for a given opening width, in particular in conjunction with changing the pivot position of the legs, a clamping force.

A fixing device can be produced in a simple manner if the sliding bar has one or more contact elements and the slide rail adapted receptacles, wherein a displacement of the sliding bar is locked when the at least one contact element is immersed in a recording. When power is applied in the direction of displacement, the abutment element abuts a wall of the receptacle and its movement is blocked. To lead out the contact element of a recording, a force is necessary when a contact element is held in an associated recording on clamping force in the manner of a grid. The direction of the force required to bring a contact element out of a receptacle (and thereby allow a displacement of the Gleitbügels), lies transversely to the direction of displacement.

In particular, a series of receptacles is provided, for example in the form of a wave structure, in order to be able to provide a multiplicity of fixing positions along the direction of displacement while at the same time being able to minimize the distance between adjacent (discrete) fixing positions.

A fixation in a holding position and a release from a holding position can be achieved in a simple manner when the receptacles and a surface on which acts a force-exerting element such as a resilient tongue element, are arranged on opposite sides of the slide rail. By doing so leaves Press the sliding bar with a contact element in a recording and when exercising a counter force can be a contact element lead out of a recording, so as to solve the holding position.

It is favorable if the receptacles have side surfaces which are inclined with respect to the direction of displacement. The side surfaces do not have to be flat, but can also be curved. In inclined side surfaces, a corresponding contact element is pressed into a potential minimum by exerting a force with a force component parallel to the direction of displacement. It can thereby realize a substantially play-free holding position. Preferably, a receptacle is then formed as a type of trough with inclined side walls.

It can be provided that the slide rail is provided with a scale. This facilitates the defined setting of a shift position of the slide bracket on the slide rail or the slide rail on the associated leg.

It may also be alternatively or additionally provided that the slide rail is arranged lockable displaceable on the associated leg. The slide rail is slide rail in the sense that it is guided on the associated leg, that can "slide" on the associated leg. The corresponding jaw part of the leg can then be moved by the slide rail is moved to the jaw part. This results in the advantages already described above; In particular, the clamping force is adjustable to one or more workpieces in the mouth.

The jaw part can be firmly seated on the sliding guide rail, for example, by integrally formed on the slide rail or is fixed to this via fastening means such as screws or bolts. But it is also possible that the jaw itself sits lockable slidably on the sliding slide. A relative distance between the jaw member and the pivot bearing can then be adjusted via two different options, namely setting the position of the jaw member on the slide rail and adjusting the position of the slide on the associated leg. In this case, the slide rail is a slide in double meaning, since the jaw part, which is in particular designed as a slide, lockable on the rail is guided displaceably, and on the other hand, the slide itself is guided lockable on the leg slidably.

In particular, it is then provided that the associated leg has a guide recess for the slide so as to allow a relative displacement between the slide rail (with the jaw part) and the leg. It may be provided as described above elastic elements to provide for a jamming of defined holding positions of the slide on the leg.

In order to realize a clamp, a spring, such as a torsion spring or leg spring, is preferably arranged between the first leg and the second leg. The spring is then responsible for a clamping force holding one or more workpieces between the jaws of the jaw.

Preferably, the spring is arranged and designed so that an external force is necessary to pivot the legs relative to each other by increasing the opening width of the mouth. Without external exertion of force then presses the spring apart the two legs and thereby the jaw parts together. When the legs are pressed together by external force exerting their handle parts, then the spring is compressed and the mouth opens. When introducing a workpiece into the mouth under the jaw parts then a clamping force acts on the workpiece.

The spring is formed for example as a leg spring with at least one leg. It can have a spring winding with several turns. The at least one leg of the spring can be positioned on a handle part and in particular on an inner side of the handle part facing the handle part of the other leg. As a result, the spring can be positioned and fixed in a safe and simple manner.

In particular, a spring winding is formed between a first leg and a second leg.

The spring winding can be arranged via a pin element, by means of which a shaft or a pivot bearing for the pivotability of the terminal leg is formed.

In particular, the spring is arranged and formed so that the legs exert a clamping force on one or more workpieces, which lie between the jaws of the two legs.

It is particularly advantageous if a contact element for a workpiece is movably arranged on the jaw part of the first leg and / or of the second leg and, in particular, is arranged pivotably with a pivot axis parallel to the pivot axis for the pivoting movement of the two legs. As a result, a good conditioning of the jaw parts on a workpiece can be achieved independently of the opening width of the jaw.

Figur 1

eine Draufsicht auf ein Ausführungsbeispiel eines erfindungsgemäßen Klemmen-Handwerkzeugs;

Figur 2

eine Ansicht auf das Klemmen-Handwerkzeug gemäß Figur 1 in der Richtung A;

Figur 3

eine Ansicht des Klemmen-Handwerkzeugs gemäß Figur 1 in der Richtung B;

Figur 4

eine Ansicht des Klemmen-Handwerkzeugs gemäß Figur 1 in der Richtung C;

Figur 5

eine Ansicht des Klemmen-Handwerkzeugs gemäß Figur 1 in der Richtung D;

Figur 6

eine Schnittansicht des Klemmen-Handwerkzeugs gemäß Figur 1 längs der Linie 6-6 (vgl. Figur 4);

Figur 7

die gleiche Ansicht wie Figur 1 mit einer anderen Schwenkstellung von Schenkeln und einer anderen Verschiebungsstellung eines Gleitbügels;

Figur 8

eine Draufsicht auf ein zweites Ausführungsbeispiel eines erfindungsgemäßen Klemmen-Handwerkzeugs und

Figur 9

eine Draufsicht auf ein drittes Ausführungsbeispiel eines erfindungsgemäßen Klemmen-Handwerkzeugs.

The following description of a preferred embodiment is used in conjunction with the drawings for a more detailed explanation of the invention. Show it:

FIG. 1

a plan view of an embodiment of a clamp hand tool according to the invention;

FIG. 2

a view of the terminal hand tool according to FIG. 1 in direction A;

FIG. 3

a view of the terminal hand tool according to FIG. 1 in the direction B;

FIG. 4

a view of the terminal hand tool according to FIG. 1 in the direction C;

FIG. 5

a view of the terminal hand tool according to FIG. 1 in the direction D;

FIG. 6

a sectional view of the clamp hand tool according to FIG. 1 along the line 6-6 (cf. FIG. 4 );

FIG. 7

the same view as FIG. 1 with another pivotal position of legs and another displacement position of a sliding bar;

FIG. 8

a plan view of a second embodiment of a clamp hand tool according to the invention and

FIG. 9

a plan view of a third embodiment of a clamp hand tool according to the invention.

An embodiment of a clamp hand tool according to the invention, which in the FIGS. 1 to 7 shown and in FIG. 1 as a whole is designated 10, comprises a first leg 12 and a second leg 14th

The two legs 12, 14 are pivotable relative to each other. For this purpose, a pivot bearing 16 is provided which comprises a pivot shaft 18.

For example, in each case recesses 20a, 20b are formed in the first leg 12 and in the second leg 14 (cf. FIG. 6 ), wherein these recesses 20a and 20b are aligned. The recess 20a of the first leg 12 is formed in respectively opposite tabs 22a, 22b (see FIG. FIGS. 1 to 5 ). The two tabs 22a and 22b are spaced. Between these two tabs, the second leg 14 with a corresponding element 24 is arranged, in which the recess 20b is formed (see. FIG. 6 ).

A pin member is seated in the recesses 20a, 20b and serves as a pivot shaft 18. This pin member 18 is seated against rotation on the first leg 12 and in particular rotationally fixed to the tabs 22a, 22b. These each include a recess 26 which is formed so that a corresponding element can be rotatably received, which is connected to the pivot shaft 18.

The first leg 12 includes a handle portion 28 and an integral with this jaw member 30. The handle portion 28 is formed on an outer side 32 in particular ergonomically.

The handle part 28 and the jaw part 30 of the first leg 12 are connected via a connecting part 34, wherein the tabs 22a, 22b are seated on the connecting part. In the embodiment shown, the handle portion 28 extends in a longitudinal direction 36. The first leg 12 is designed arcuately away from the handle portion 28 on the outside 32. An inner side 38 opposite the outer side 32 has an L-shaped configuration in the region of the jaw part 30.

In the region of one end of the jaw part 30, which faces away from the handle part 28, a contact element 40 is seated with a contact surface 42 for a workpiece. This contact element 40 is movable and in particular pivotally mounted on the jaw member 30. As a pivot shaft 44 is for example a retaining pin. The pivot axis of the pivot shaft 44 is aligned substantially parallel to the pivot axis of the pivot bearing 16.

The second leg 14 also includes a handle portion 46, which is opposite to the handle portion 28 of the first leg 12. The handle portions 28 and 46 are formed and positioned relative to each other so that an operator can grasp the handle portions 28, 46 with one hand and can push the handle portions 28, 46 towards each other.

The second leg 14 also includes a jaw member 48 (second jaw member). At one end of this jaw member 48 in turn sits a contact element 50 with a contact surface 52 for a workpiece. This abutment element 50 is in turn preferably arranged pivotably with a pivot shaft 54 on the jaw part 48.

A connecting line of the piercing points of the pivot shaft 44 on the first leg 12 and the pivot shaft 54 on the second leg 14 is perpendicular to the pivot axis of the pivot bearing 18 and parallel to a displacement direction 56 of the jaw member 48 with respect to the second leg 14th

On the second leg 14 sits fixed against displacement a slide rail 58, which is oriented transversely and in particular perpendicular to the pivot axis of the pivot bearing 16 and is oriented transversely and in particular perpendicular to a longitudinal direction 60 of the handle portion 46. At this slide rail 58 of the jaw member 48 of the second leg 14 is slidably guided lockable, so that the distance of the jaw member 48 in the displacement direction 56 relative to the second leg 14 and thus to the pivot bearing 16 is adjustable.

The jaw part 48 of the second leg 14 is designed as a sliding bar, which is guided displaceably along the slide rail 58.

The slide rail 58 is fixedly connected to the handle portion 46. The connection may be in one piece or it may be two separate components, which are subsequently fixed together.

To guide the Gleitbügels (jaw 48) on the slide rail 58, the guide rail 58 has one or more strip-shaped guide profiles. In the embodiment shown, the slide rail 58 comprises three spaced guide rails 62a, 62b and 62c (FIGS. FIG. 2 ), which are arranged along the displacement direction 56 and point to one end of the jaw part 48, which faces away from the end on which the abutment element 50 is seated.

The jaw part 48 has a guide region 64, via which the jaw part 48 sits on the slide rail 58. This guide region 64 in turn has corresponding recesses 66a, 66b and 66c, which receive the corresponding guide rails 62a, 62b and 62c.

It may be provided that the central guide rail 62b has a greater height than the edge guide rails 62a and 62c (see. FIG. 3 ).

On the one hand, good guidance of the slide bar 48 is ensured on the slide rail 58 via the guide portion 64 with the adapted guide rails 62a, 62b, 62c and recesses 66a, 66b, 66c, on the other hand, it is ensured that the jaw member 48 is not transverse to the displacement direction 56 of the Slide rail 58 can be removed.

On an outer side 68, which faces the contact element 50, the slide rail 58 has a series of receptacles 70 for a contact element 72 (cf. FIG. 6 ) of the jaw part 48. The row of receptacles 70 is formed for example in a kind of wave profile, in which depressions are provided on the outer side 68, which repeat periodically in the displacement direction 56.

The abutment element 72 of the jaw part 48 can dip into a corresponding receptacle 70. As a result, the displacement in the displacement direction 56 can be locked so that the jaw part 48 is held in a certain distance position relative to the handle part 46. This holding takes place in particular essentially free of play.

For holding a latching of the guide portion 64 is provided with the slide rail 58. In particular, a clamping force is exerted, which presses a dipped in an associated receptacle 70 contact element 72 in just this recording 70 and thus ensures a locking.

In the embodiment shown, the jaw part 48 of the leg 14 comprises one or more elastic elements and in particular one or more tongue elements 74, which are arranged resiliently on the jaw part 48.

Such a tongue element 74 (cf. FIG. 6 ) acts on the outer side 68 opposite side 76 of the slide rail 58 and presses against it. As a result, in turn, the abutment element 72, which sits in the corresponding receptacle 70, pressed into this receptacle 70, so that a movement in the displacement direction 56 is locked. By exerting force transversely to the displacement direction 56, the abutment element 72 can be released from the receptacle 70 in order to carry out a displacement of the sliding bar 48.

The at least one tongue element 74 is in particular formed integrally on the jaw part 48. It is in particular integrally connected to the jaw part 48. It extends, for example, away from the handle part 46 and protrudes beyond an outer side 78 of the jaw part 48. It thereby exerts a force which has a component parallel to the displacement direction 56 and a component perpendicular to the displacement direction 56, wherein the force application point 80 is preferably at a distance from the abutment element 72 of the jaw part 48 relative to the displacement direction 56. This distance in the displacement direction 56 to the pivot bearing 16 is greater than the distance of the contact element 72 in the displacement direction 56 to the pivot bearing 16th

The receptacles 70 are preferably formed in correspondence with the abutment element 72 such that the force of the at least one tongue element 74 (with a force component parallel to the displacement direction 56) presses the jaw part 48 of the leg 14 into a holding position, in which the jaw part 48 substantially is held without play on the slide rail 58. For this purpose, the receptacles 70 preferably with respect to the displacement direction 56 inclined walls (in FIG. 6 indicated by the reference numeral 82), which cause the contact element 72 is pressed in the low point of a depression formed by a receptacle 70 in the manner of a potential minimum.

Between the two legs 12 and 14 sits a spring 84 ( FIGS. 1 . 6 and 7 ), which is biased so that it tends to push the two legs 12, 14 apart (see. FIG. 7 ). The pivotal movement of the two legs 12, 14 is then limited without external application of force, characterized in that the two contact elements 40, 50 are adjacent ( FIG. 7 ) or that the abutment elements 40, 50 bear against a workpiece which lies between the two jaw parts 30, 48.

The two jaw members 30, 48 form a mouth 86, the opening width of which is adjustable by the relative pivoting position of the two legs 12, 14. To open the mouth, a force must be exerted by pressing the two legs 12, 14 towards each other. This force is exercised by an operator. Then, when a workpiece is inserted into the open mouth 86 and the force is released so far that the abutment elements 40, 50 abut against the workpiece, then the spring 84 exerts a corresponding force, which the workpiece in the mouth 86 with the jaws 30, 48 jammed.

A corresponding clamp-type hand tool is used, for example, in connection with the gluing of wooden parts and therefore also referred to as a glue clamp.

The spring 84 is, for example, a torsion spring or leg spring.

The spring 84 includes, for example, a first leg or stirrup 85a and a second leg or stirrup 85b (FIG. FIG. 6 ). Between these legs 85a, 85b, a spring winding 87 is formed. The spring winding 87 surrounds the Pin member 18, that is, the pin member 18 is performed by an inner space of the spring coil 87.

The spring 84 is held on the handle portion 28 of the first leg 12 via its first leg 85a. This has, on a side facing the second leg 14, cup-shaped inner side spaced web elements 89 with recesses in which the first leg 85a of the spring 84 is seated and in particular sits clamped.

The second leg 85b of the spring 84 is positioned in the same manner on an inner side of the handle portion 46 of the second leg 14.

According to the invention, it is provided that the opening width of the mouth 86 is also adjustable by the displacement of the jaw member 48 on the slide rail 58. This results in the possibility of also setting the clamping force with which a workpiece is clamped between the two contact elements 40, 50. For example, if a workpiece with predetermined dimensions is to be held by the clamp hand tool 10, then a certain opening width of the mouth 86 can be achieved both via the pivotal position of the two legs 12, 14 and via the displacement position of the jaw part 48. Usually, it is such that at a small pivot angle between the two legs 12 and 14 (in FIG. 1 indicated) a relatively large force is exercised. An operator can reduce this force by allowing a larger angle between the two legs 12, 14 (ie, providing less pivoting from the home position), but increasing the distance of the jaw part 48 in the direction of displacement 56 from the pivot bearing 16.

Since the two abutment elements 40 and 50 are pivotally mounted on their respective jaw members 30, 48, a secure abutment on the workpiece is provided independently of the pivotal position of the two legs 12, 14 relative to each other.

As a result, lower clamping forces can be exerted, for example, on more sensitive workpiece surfaces.

By virtue of the clamp-type hand tool 10 according to the invention, the force can thus be set at a given opening width of the mouth 86 by corresponding adjustment of the pivoting position of the two limbs 12, 14 and the displacement position of the jaw part 48, i. H. The force exerted on the workpiece can be metered.

In an analogous manner, a certain force can be achieved on a workpiece, which is to be clamped, even with different opening widths of the mouth 86.

It can be provided that a scale 88 is arranged on the slide rail 58 ( FIG. 7 ) to adjust a defined displacement position of the jaw member 48 on the slide rail 58 can.

Usually, leg springs have a force-elongation characteristic in which the force is less proportional to smaller spring travel than with a larger spring travel. This means in known from the prior art clamp hand tools that a small and possibly insufficient clamping force acts when the workpiece to be clamped low Has height dimensions and in particular is flat. In the solution according to the invention, this problem can be remedied in that the spring 84 is installed so that in a starting position in which the spring section has a zero position, the jaw member 48 is positioned at a distance from the handle portion 46. It can then reach the same opening width also when the two legs 12, 14 are moved towards each other and the jaw member 48 is moved toward the pivot bearing 16 back. In this new pivotal position of the two legs 12, 14 to each other but a greater spring extension is achieved with a larger force, so that at the same opening width of the mouth 86, a larger force acts. The inventive solution thus conventional springs 84 can be used, but even with small opening widths, a higher clamping force can be achieved without just the spring 84 itself must be changed.

The legs 12, 14 can in principle be made of a metallic material. But it is also possible to make the legs 12, 14 of a plastic material.

The clamp-type hand tool 10 has a displaceable jaw part, namely the jaw part 48, while the jaw part 30 is fixedly connected to the first leg 12. It is also possible in principle for both jaw parts 30, 48 to be displaceable on the associated limb 12, 14.

In a second embodiment of a clamp hand tool according to the invention, which in FIG. 8 shown there and designated as a whole by 90, a first leg 92 and a second leg 94 is provided, which are basically formed as described above, wherein they include respective jaws 96 and 98. The jaw part 98 of the second leg 94 sits firmly, for example via a bolt connection 100, on a slide rail 102. This guide rail 102 is displaceable in the displacement direction 56 with respect to the legs 92, 94, so that in this way the distance of the jaw part 98 to a pivot bearing 104 for pivoting the two legs 92, 94 is adjustable.

In order to allow the displaceability of the slide rail 102 on the legs 92, 94, the leg 94 has a recess 106, in which the slide rail 102 is immersed. This recess 106 serves as a guide recess for the slide rail 102, just to allow the mobility relative to the second leg 94. The leg 92 may have a recess 108, which is designed in particular as a free space, which allows the displaceability of the slide rail 102 relative to the first leg 92 and a pivotability of the two legs 92, 94.

The slide rail 102 is detectably displaceable with respect to the leg 94. The recess 108 is formed so that when guided on the second leg 94 slide 102, the pivotability of the two legs 92, 94 is ensured relative to each other.

The determination of the slide rail 102 for setting a certain distance position of the jaw member 98 with respect to the pivot bearing 104 may, for example, via one or more clamping force generating elements, as described above in connection with the first embodiment. For example, the first leg 94 may be provided with one or more resilient elements which act on the slide rail 102, to keep these in a certain displacement position largely free of play, these displacement positions are adjustable.

In the embodiment according to the FIGS. 1 to 7 the relative displaceability of the jaw member 48 relative to the associated leg 14 is achieved in that the jaw member 48 is displaceable on a rigidly connected to the leg 14 slide rail 58. In the embodiment according to FIG. 8 the relative displaceability of the jaw member 98 relative to the associated leg 94 is achieved in that the fixedly arranged on the slide rail 102 jaw member 98 is movable with respect to the leg 94 slidable slide rail 102.

In principle, a combination of these two displacement solutions is possible, namely that a jaw part is displaceably guided on a slide rail and the guide rail itself is in turn displaceable on the associated leg displaceable.

At an in FIG. 9 shown and designated there as a whole by 110 third embodiment, a first leg 112 and a second leg 114 is provided. These are pivotable about a pivot bearing 116 relative to each other. The first leg 112 comprises a jaw member 118 and the second leg 114 includes a jaw member 120. This jaw member 120 is formed as a sliding bracket similar to the jaw member 48 according to the first embodiment and slidably lockable on a slide rail 122. The determination can be realized via clamping force-exerting elements as described in connection with the first embodiment.

It may also be an additional positive locking 124 may be provided in order to fix the jaw member 120 form fit with the slide rail 122, so that a displacement along the slide rail 122 is locked.

The second leg 114 has a receptacle 126, in which the slide rail 122 is immersed and in which it is determined slidably guided.

The slide rail 122 is fixable to the second leg 114 in particular via a positive connection 128.

When the jaw member 120 is fixed to the slide rail 122 via the positive lock detection 124 and the slide rail 122 is fixed to the leg 114 via the interlocking connection 128, then the opening width can be adjusted only via the relative pivotal position of the two legs 112, 114.

When the positive engagement is released 124, then the relative position of the jaw member 118 can be adjusted by displacement along the slide rail 122, wherein the jaw member 118 is held in certain displacement positions, for example by clamping force substantially free of play.

When the interlocking connection 128 is released, the relative position of the jaw member 120 to the pivot bearing 128 can be adjusted by sliding the slide rail 122 relative to the second leg 114, with the relative displacement positions held substantially free of play, for example, by a clamping force.

Claims (22)

1. A clamp-type hand tool, comprising a first arm (12; 92; 112) incorporating a jaw part (30; 96; 118), a second arm (14; 94; 114) incorporating a jaw part (48; 98; 120), wherein the two arms (12, 14) are pivotal relative to one another and the jaw parts (30, 48; 96, 98; 118, 120) form a jaw (86) having an adjustable aperture, and the jaw part (30; 48; 98; 120) of the first arm (12; 92; 112) and/or that of the second arm (14; 94; 114) is displaceable on the appertaining arm (12; 14; 94; 114), and a slide rail (58; 102; 122) for the displaceable jaw part (48; 98; 120), wherein the displaceable jaw part (48) is in the form of a sliding clip which is guided on the slide rail (58), and the sliding clip (48) is fixable on the slide rail (58) in releasable manner by means of a clamping force, characterized that there is provided at least one springy tongue element (74) as an elastic element, which presses the sliding clip (48) on to the slide rail (58), in order to retain the sliding clip (48) on the slide rail (58), and in that the at least one tongue element (74) is formed in one-piece manner with the sliding clip (48).
2. A clamp-type hand tool in accordance with Claim 1, characterized in that the displaceable jaw part (48; 98; 120) is displaceable away from the other jaw part (30; 96; 118) or is displaceable towards the other jaw part (30; 96; 118).
3. A clamp-type hand tool in accordance with Claim 1 or 2, characterised in that a size of a aperture of the jaw (86) is adjustable by means of the displaceable jaw part (48; 98; 120).
4. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the clamping force effective on one or more work-pieces that are clamped in the jaw (86) is adjustable by means of the displaceable jaw part (48; 98; 120).
5. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the displaceable jaw part (48; 98; 120) is adapted to be displaced and fixed on the appertaining arm (14; 94; 114).
6. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the direction of displacement (56) of the displaceable jaw part (48; 98; 120) is transverse to a pivotal axis for the first arm (12; 96; 118) and the second arm (14; 98; 120).
7. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the direction of displacement (56) of the displaceable jaw part (48; 98; 120) is transverse to a longitudinal direction (60) of a handle part (46) of the associated arm (14; 94; 114).
8. A clamp-type hand tool in accordance with any of the preceding claims, characterized that the slide rail (58; 102, 122) extends transversely relative to a handle part (46) of the associated arm (14; 94; 114).
9. A clamp-type hand tool in accordance with any of the preceding claims, characterised in that the slide rail (58; 102; 122) is connected to a handle part (46) of the associated arm (14; 94; 114).
10. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the sliding clip (48) comprises one or more latching elements (72) and the slide rail (58) comprises matching seatings (70), whereby a displacement of the sliding clip (48) is blocked if the at least one latching element (72) has entered into a seating (70).
11. A clamp-type hand tool in accordance with Claim 10, characterised in that a row of seatings (70) is provided along the slide rail (58) in the direction of displacement (56).
12. A clamp-type hand tool in accordance with Claim 10 or 11, characterized in that the seatings (70) and a surface (76), upon which a force-exerting element (74) is effective, are arranged at opposite sides of the slide rail (58).
13. A clamp-type hand tool in accordance with any of the Claims 10 to 12, characterized in that the seatings have side faces (82) which are inclined with respect to the direction of displacement (56).
14. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the slide rail (58) is provided with a graduated scale (88).
15. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that the slide rail (102; 122) is arranged on the associated arm (94; 114) in fixable and displaceable manner.
16. A clamp-type hand tool in accordance with Claim 15, characterised in that the jaw part (98) is firmly seated on the displaceable slide rail (102).
17. A clamp-type hand tool in accordance with Claim 15, characterised in that the jaw part (120) is seated on the displaceable slide rail (122) in fixable and displaceable manner.
18. A clamp-type hand tool in accordance with any of the Claims 15 to 17, characterised in that the associated arm (94; 114) comprises a guidance recess (106; 126) for the slide rail (102; 122).
19. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that a spring (84) is arranged between the first arm (12; 92; 112) and the second arm (14; 94; 114).
20. A clamp-type hand tool in accordance with Claim 19, characterised in that the spring (84) is arranged and constructed in such a manner that an external force must be expended in order to pivot the arms (12, 14; 92, 94; 112 114) relative to one another when enlarging the aperture of the jaw (86).
21. A clamp-type hand tool in accordance with Claim 19 or 20, characterised in that the spring (84) is arranged and constructed in such a manner that the arms (12, 14; 92, 94; 112, 114) exert a clamping force on one or more work-pieces which are located between the jaw parts (30, 48; 96, 98; 118, 120) of the two arms (12, 14; 92, 94; 112, 114).
22. A clamp-type hand tool in accordance with any of the preceding Claims, characterised in that a jaw piece (40; 50) for a work-piece is arranged, in moveable manner, on the jaw part (30; 48; 96; 98; 118; 120) of the first arm (12; 92; 112) and/or the second arm (14; 94; 114).

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