DE202004005085U1 - Workpiece clamping device for machine tool, e.g. for holding circular sawblade, comprises fixing part with screw for connecting it to nut for guiding device along groove - Google Patents

Abstract

The fixing part (20) for securing the workpiece or its holder into position includes a second screw (40) for connecting it to a nut (10) for a groove via a second bearing (60) located at a distance from a first bearing for this part. The second bearing, like the first one, is preferably located in a cavity (22, 24) in the fixing part. Pressure applied to the workpiece or its holder by the fixing part can be altered by adjusting the position of the second screw, preferably in combination with an adjustment of the first screw, especially for ensuring maximum pressure is applied or for fine adjustment of the pressure applied. The clamping device is used to secure at least one workpiece and/or at least one workpiece holder. At least one nut is used to guide the device along a groove (320). The workpiece and/or holder are fixed into position, preferably by tying them down, using at least one fixing part. An independent claim is also included for a machining device, especially a sleigh (310), designed for at least one of these clamping devices.

Description

technical area

The The present invention relates to a clamp for at least one Workpiece and / or at least one the workpiece holding holding element provided fastening means according to the preamble of claim 1.

State of technology

Usually, a workpiece or a holding member holding the workpiece is fixed to a processing device, for example on a circular saw, with the aid of a fastening means, such as with the aid of a screw clamp. In this case, the fastening means is usually mounted slidably on the machining device via a sliding block (for example, in the publication DE 200 08 799 U1 a tensioning block system attached to a workpiece processing station by means of a sliding block). To increase the clamping force on the workpiece, an eccentric or eccentric can be used.

Yet the problem arises that the workpiece and / or the holding element by means of the fastening means, in particular by means of the eccentric vice or closure, only insufficiently fixable; In addition disadvantageously does not exist the possibility of the clamping force of the screw clamp or the eccentric tensioner or closure.

Presentation of the invention: Task, solution, advantages

outgoing from the disadvantages and shortcomings set out above as well as in appreciation of the prior art is the present invention the task is based, a fastener of the aforementioned Art so weiterzuentwickeln that a workpiece and / or a workpiece holding Retaining element reliably fixed is, wherein the contact pressure in particular adjustable and arbitrary should be locatable.

These Task will be according to the teaching the present invention by a fastener with the solved in claim 1 mentioned features. Advantageous embodiments and appropriate training The present invention is characterized in the subclaims.

by virtue of the inventively provided Bearings, in particular screw and / or bearing points, can be a very high clamping force are built up; in particular, by the second Bearing the lever arm of the locking element increases, so that by the Lever arm mediated locking torque and thus the clamping pressure on the workpiece and / or on the workpiece to be maximized directly or indirectly holding holding element can.

• – sowohl ein direktes Niederspannen des Werkstücks
• – als auch ein indirektes Niederspannen des Werkstücks durch Niederspannen des das Werkstück haltenden Halteelements, insbesondere per Leistenüberbrückung,

zulässt, gestattet das Befestigungsmittel eine hohe Flexibilität im praktischen Einsatz.As the fastener according to the present invention

• - Both a direct low-voltage of the workpiece
• - As well as an indirect low-voltage of the workpiece by low-voltage of the holding member holding the workpiece, in particular by bar bridging,

allows the fastener a high flexibility in practical use.

By the indirect low-voltage, preferably by bridging by means of (wooden) strips can be achieved also extremely narrow and / or very small workpieces can be fixed exactly, so that optimal processing, for example, an optimal cut with a sliding table saw, can be done.

at an advantageous embodiment of the present invention can the workpiece and / or the holding element by means of the fastening means on at least one a groove having processing device, in particular at least a circular saw blade associated trimming or sliding carriage, be clamped. The present invention thus allows a simple and fast Niederspannmöglichkeit on sliding or Besäumschlitten of circular saws in the existing groove or in the existing grooves of the sliding or trimming carriage.

Of the Become a specialist in the field of processing devices for workpieces particularly appreciate with respect to the present invention that the attachment means basically for each type of processing device, which has a groove is suitable.

there The groove can advantageously as a so-called T-slot with a range narrow recess and formed with a wide recess area be, so that the sliding block in the area wide recess is feasible and the nut facing portion of the respective screw can be guided in the narrow recess area. The sliding block thus forms a kind of abutment for absorbing power in the T-slot.

If the present invention is to be developed in a particularly expedient manner, then it is recommended that the internal thread associated with the respective bearing with the Au ßengewinde the respective threaded rod cooperates, that the respective bearing transmits the force applied to the respective screw head torque to the locking element. Thus, the highest contact pressure can be applied exactly at the point at which the maximum pressure on the workpiece to be machined is required by the first screw and the second screw element are adjusted to each other individually operated as needed.

there is according to one advantageous embodiment of the present invention the tilting axis mediated by the first bearing substantially perpendicular oriented to the threaded rod of the first screw; analogous For this purpose is also in an advantageous manner by the second camp mediated tilt axis substantially perpendicular to the threaded rod oriented the second screw.

alternative or in addition this can be the localization and / or maximization of the workpiece and / or on the holding element attachable maximum contact pressure corresponding rotation of the first screw and / or by corresponding rotation of the second screw particularly variable be adjustable. Thus, it is with such a fastening or clamping means in a manner essential to the invention possible, the workpiece if the tension is not fully tightened, readjust or reorient.

Also from the point of view of accident prevention the fastener is very beneficial, because the workpiece and / or the retaining element can by means of the fastening means, for example close to the saw blade one circular saw be fixed; Thus, the workpiece and / or the holding element not close by hand the saw be kept (in view of the safety aspects to be considered was conventionally the cutting of small workpieces only possible with a consuming to be produced cutting device, because Hands and Fingers are not allowed unprotected very close to the saw blade come because this is very dangerous would).

• – beim Sägen mindestens eines langen Keils,
• – beim Zurechtschneiden mindestens einer spitzen Leiste,
• – beim Sägen mindestens eines kleinen und/oder schmalen Werkstücks,
• – beim konischen Sägen mindestens einer Bekleidung und/oder
• – beim konischen Sägen mindestens eines Putzstabs

eingesetzt werden.Due to the not inconsiderable risk potential of a circular saw, the fastening means according to the invention, for example

• When sawing at least one long wedge,
• - when trimming at least one pointed strip,
• When sawing at least one small and / or narrow workpiece,
• - When conically sawing at least one garment and / or
• - When conically sawing at least one cleaning rod

be used.

The Finally, the present invention relates to at least one processing device. in particular at least one Besäum- or a circular saw blade associated Besäum- Sliding carriage, designed for at least one fastener according to the above Art.

Short description the drawings

As already discussed above, there are various possibilities for embodying and developing the teaching of the present invention in an advantageous manner. Reference is made on the one hand to the claims subordinate to claim 1, on the other hand, further embodiments, features and advantages of the present invention hereinafter with reference to the by 1 to 5 illustrated embodiment explained in more detail.

It shows:

1 in side view an embodiment of an inserted into a groove of a Besäum- or sliding carriage fastener according to the present invention;

2 in supervision, the fastener 1 ;

3 in front view of the fastener 1 and 2 ;

4 in a perspective view of a first example of the use of the fastener 1 to 3 in a processing device; and

5 in a perspective view of a second example of the use of the fastener 1 to 3 in the processing device 4 ,

The same or similar embodiments, elements or features are in the 1 to 5 provided with identical reference numerals.

best way for execution the invention

In the 1 to 3 is an embodiment of a fastener 100 represented in the form of a workpiece clamp according to the present invention. This workpiece clamp 100 is in accordance with the 4 and 5 for clamping a workpiece 200 and / or one or more of the workpiece 200 holding holding elements 210 . 212 determined on a processing machine or device 300 in the form of a sliding table saw.

The workpiece clamp 100 has a party adjustment element 20 on, by means of the underside 20u the workpiece 200 or the holding element 210 . 212 can be depressed. This locking element 20 is about a first screw 30 and one of the first screw 30 spaced second screw arranged 40 with a nut 10 connected. Here are the threaded rod 32 the first screw 30 and the threaded rod 42 of the second screw element 40 arranged substantially parallel to each other (see. 1 . 2 . 4 . 5 ).

• – im wesentlichen parallel zur Ausdehnung des Nutensteins 10 und
• – im wesentlichen senkrecht zu den Gewindestangen 32, 42.

Dementsprechend verläuft der in Bezug auf seine flächige Ausgestaltung im wesentlichen rechteckige Nutenstein 10 im wesentlichen senkrecht zur Achse der beiden Schraubelemente 30, 40.The locking element 20 is made of wood and runs in its longitudinal extension L

• - substantially parallel to the extension of the sliding block 10 and
• - substantially perpendicular to the threaded rods 32 . 42 ,

Accordingly, in relation to its planar configuration substantially rectangular sliding block runs 10 substantially perpendicular to the axis of the two screw elements 30 . 40 ,

The screw elements 30 respectively. 40 are each about a warehouse 50 respectively. 60 (so-called transverse bearing) with the locking element 20 connected, with the transverse bearing 50 respectively. 60 each in a correspondingly shaped recess 22 respectively. 24 of the locking element 20 is arranged (see. 1 ).

About each one the camps 50 respectively. 60 associated internal thread act the screw 30 respectively. 40 with the locking element 20 together, so that the rotational forces of the screw elements 30 respectively. 40 through the cross bearings 50 respectively. 60 from the respective thread of the screw 30 respectively. 40 on the locking element (= on the retaining bolt 20 ) be transmitted.

The rotation around the first bearing 50 spaced second tilting bearings 60 allows compared to the rotation of only one bearing (see prior art) a high gear ratio and thus an additional leverage or another lever torque. This can be achieved, for example, a doubling effect of the applied clamping force.

By alternately turning the two screw elements 30 and 40 So can a very high clamping force for fixing the workpiece 200 or of the retaining element 210 . 212 be built, because of the two screw / bearing points 50 and 60 resulting clamping pressure is maximized by train (leverage).

From the 1 . 4 and 5 it can be seen that the first screw 30 and the second screw 40 asymmetrical with respect to the center of gravity or with respect to the center of the locking element 20 are arranged.

This means that the distance A1 (= distance between the workpiece 200 and / or the retaining element 210 . 212 facing end region 26 the longitudinal extent L of the locking element 20 and the workpiece 200 and / or the retaining element 210 . 212 facing screw 30 ) greater than the distance A2 (= distance between the workpiece 200 and / or from the holding element 210 . 212 opposite end region 28 the longitudinal extent L of the locking element 20 and that of the workpiece 200 and / or from the holding element 210 . 212 remote screw 40 ).

In this way, by the locking element 20 at his the workpiece 200 and / or the retaining element 210 . 212 facing bottom 20u provided a comparatively large support or holding surface.

In the Seitenansichht (vgl. 1 ) is the locking element 20 hexagonal, in particular approximately trapezoidal, wherein the locking element 20 to its two end areas 26 . 28 towards each tapered wedge-shaped and therefore designed to be particularly space-saving and handy.

Furthermore, the respective, from the sliding block 10 opposite end of the first screw 30 or the second screw 40 each one provided for manual turning screw head 34 respectively. 44 to ensure a secure opportunity to attack and ease of use of the workpiece clamp 100 to ensure.

• – jeweils eine an der dem Feststellelement 20 zugewandten Seite des Nutensteins 10 starr mit der Gewindestange 32 bzw. 42 verbundene Haltescheibe 36 bzw. 38 sowie
• – jeweils eine an der vom Feststellelement 20 abgewandten Seite des Nutensteins 10 starr mit der Gewindestange 32 bzw. 42 verbundene Haltescheibe 46 bzw. 48.

To ensure that the threaded rods 32 respectively. 42 rotatable with respect to the sliding block 10 are, the distance of the respective screw head 34 respectively. 44 to the nut 10 However, is not variable, are on the nut 10 facing end of each screw 30 respectively. 40 two holding discs provided, namely

• - One at the the locking element 20 facing side of the sliding block 10 rigid with the threaded rod 32 respectively. 42 connected retaining washer 36 respectively. 38 such as
• - One at each of the locking element 20 facing away from the sliding block 10 rigid with the threaded rod 32 respectively. 42 connected retaining washer 46 respectively. 48 ,

In the 4 and 5 is the operating principle of the fastener (= the workpiece clamp 100 ) in a sliding table saw 300 shown.

The workpiece clamp 100 is by means of the sliding block 10 in a groove 320 respectively. 322 one of the Panel saw 300 associated trimming or sliding carriage 310 arranged. Then the locking element 20 by coordinated rotation of the first screw 30 and the second screw 40 on the workpiece 200 and / or on the holding element 210 . 212 Depressed until the workpiece 200 and / or the retaining element 210 . 212 is fixed.

In this case, for example, two workpiece clamps 100 in one and the same groove 320 the trimming or sliding carriage 310 the format circular saw 300 be arranged (see. 4 ). In this way, for example, a wooden strip or wooden plank 200 by means of a first retaining strip 210 and by means of a second retaining strip 212 be fixed indirectly.

But it is also possible, a first workpiece clamp 100 in a first groove 320 the trimming or sliding carriage 310 and a second workpiece clamp 100 in a second groove 322 the same trimming or sliding carriage 310 to arrange. Also in this way can a workpiece 200 , For example, a tapered pole at its end, by means of a first retaining strip 210 and by means of a second retaining strip 212 be fixed indirectly (cf. 5 ).

100

Fastening means, in particular workpiece clamping

10

Slot nut, especially for T-shaped groove 320 . 322

20

Fixing element, in particular retaining bolts

20u

the nut 10 facing bottom of the locking element

20

22

first, in particular circular cylindrical recess of

Fixing element 20

24

second, in particular circular cylindrical recess of

Fixing element 20

26

the workpiece 200 and / or the retaining element 210 facing

End region of the longitudinal extent L of the locking element 20

28

from the workpiece 200 and / or from the holding element 210 facing away

End region of the longitudinal extent L of the locking element 20

30

first, in particular the workpiece 200 and / or the

retaining element 210 facing screw

32

Threaded rod of the first screw 30

34

Screw head of the first screw 30

36

upper retaining disk of the first screw 30

38

lower retaining washer of the first screw 30

40

second, especially from the workpiece 200 and / or from

retaining element 210 remote screwing

42

Threaded rod of the second screw 40

44

Screw head of the second screw 40

46

upper retaining disk of the second screw 40

48

lower retaining washer of the second screw 40

50

the first screw 30 associated warehouse

52

through the first camp 50 provided tilting axis

60

the second screw 40 associated warehouse

62

through the second camp 60 provided tilting axis

200

Workpiece, in particular Wedge, groin, clothing and / or

cleaning rod

210

(First) Retaining element, in particular (first) retaining strip

212

second Retaining element, in particular second retaining strip

300

processing device or processing machine,

especially circular saw

310

Trimming or sliding carriage of the processing device 300

320

(first) groove of the processing device 300 .

in particular (first) groove of trimming or sliding carriage 310

322

second groove of the processing device 300 .

in particular second groove of Besäum- or sliding carriage 310

330

circular saw blade

A1

Distance of the workpiece 200 and / or the retaining element 210

facing end region 26 the longitudinal extent L of

Fixing element 20 from the workpiece 200 and / or the

retaining element 210 facing screw 30

A2

Distance from the workpiece 200 and / or from the holding element 210

remote end region 28 the longitudinal extent of the

Fixing element 20 from the workpiece 200 and / or from

retaining element 210 remote screw 40

L

Longitudinal extension of the locking element 20

Claims (10)

For clamping at least one workpiece ( 200 ) and / or at least one the workpiece ( 200 ) retaining element ( 210 . 212 ) provided fastening means ( 100 ), comprising - at least one sliding block ( 10 ), by means of which the fastening means ( 100 ) in at least one groove ( 320 . 322 ) is feasible, - at least one locking element ( 20 ) for fixing, in particular for low-tension, the workpiece ( 200 ) and / or the retaining element ( 210 . 212 ) and - at least one screw element ( 30 ), - by means of which the locking element ( 20 ) with the sliding block ( 10 ) via a locking element ( 20 ), in particular in a recess ( 22 ) of the locking element ( 20 ), warehouse ( 50 ) and - that via a warehouse ( 50 ) associated thread so with the locking element ( 20 ) cooperates, that the locking element ( 20 ), in particular with its the nut ( 10 ) facing the underside ( 20u ), by turning the screw ( 30 ) on the workpiece ( 200 ) and / or on the holding element ( 210 . 212 ) until the workpiece ( 200 ) and / or the retaining element ( 210 . 212 ) is fixed, characterized in that the locking element ( 20 ) at least one second screw element ( 40 ), - by means of which the locking element ( 20 ) with the sliding block ( 10 ) about one from the first camp ( 50 ) spaced and the locking element ( 20 ), in particular in a second recess ( 24 ) of the locking element ( 20 ), second bearing ( 60 ) and that via a second warehouse ( 60 ) associated thread so with the locking element ( 20 ) cooperates, that the contact pressure of the locking element ( 20 ), in particular the underside ( 20u ) of the locking element ( 20 ), on the workpiece ( 200 ) and / or on the holding element ( 210 . 212 ) by turning the second screw element ( 40 ), preferably in cooperation with the first screw ( 30 ), adjustable, in particular maximized, and / or readjustable. Fastening means according to claim 1, characterized in that the workpiece ( 200 ) and / or the retaining element ( 210 . 212 ) by means of the fastening means ( 100 ) at least one groove ( 320 . 322 ) having processing device ( 300 ), in particular on at least one circular saw blade ( 330 ) associated Besäum- or sliding carriage ( 310 ), is clamped. Fastening means according to claim 1 or 2, characterized in that the groove ( 320 . 322 ) T-shaped - with a region of wide recess and - is formed with a region of narrow recess, so that the sliding block ( 10 ) is feasible in the region of wide recess and the respective the sliding block ( 10 ) facing portion of the screw elements ( 30 . 40 ) is feasible in the narrow recess area. Fastening means according to at least one of claims 1 to 3, characterized in that - the threaded rod ( 32 ) of the first screw element ( 30 ) and the threaded rod ( 42 ) of the second screw element ( 40 ) are arranged substantially parallel to each other and / or - that the locking element ( 20 ) - in its substantially parallel to the substantially rectangular extension of the sliding block ( 10 ) formed longitudinal extent (L) substantially perpendicular to the threaded rods ( 32 . 42 ) runs and / or - is formed from wood. Fastening means according to at least one of claims 1 to 4, characterized in that the first screw ( 30 ) and the second screw element ( 40 ) asymmetrically with respect to the center of the locking element ( 20 ) are arranged so that the distance (A1) of the workpiece ( 200 ) and / or the holding element ( 210 . 212 ) end region ( 26 ) of the longitudinal extent (L) of the locking element ( 20 ) of the workpiece ( 200 ) and / or the holding element ( 210 . 212 ) facing screw ( 30 ) greater than the distance (A2) of the workpiece ( 200 ) and / or the retaining element ( 210 . 212 ) remote end region ( 28 ) of the longitudinal extent (L) of the locking element ( 20 ) from the workpiece ( 200 ) and / or the retaining element ( 210 . 212 ) facing away from the screw element ( 40 ). Fastening means according to at least one of claims 1 to 5, characterized in that - the respective, from the sliding block ( 10 ) facing away from the first screw ( 30 ) or of the second screw element ( 40 ) each provided for a particular manual turning screw head ( 34 respectively. 44 ) and / or - that the respective, the sliding block ( 10 ) facing the end of the first screw ( 30 ) or of the second screw element ( 40 ) in each case on the sliding block ( 10 ) is attached, that the screw elements ( 30 respectively. 40 ) rotatable, but not longitudinally displaceable with respect to the sliding block ( 10 ) are. Fastening means according to at least one of claims 1 to 6, characterized in that the first bearing ( 50 ) associated with the internal thread or the second bearing ( 60 ) associated with each female thread in each case with the external thread of the first threaded rod ( 32 ) or with the external thread of the second threaded rod ( 42 ) that the respective warehouse ( 50 respectively. 60 ) at the respective screw head ( 34 respectively. 44 ) applied torque to the locking element ( 20 ) transmits. Fastening means according to at least one of claims 1 to 7, characterized in that - by the first bearing ( 50 ) mediated tilt axis ( 52 ) substantially perpendicular to the threaded rod ( 32 ) of the first screw element ( 30 ) and - that through the second camp ( 60 ) mediated tilt axis ( 62 ) substantially perpendicular to the threaded rod ( 42 ) of the second screw element ( 40 ) is oriented. Fastening means according to at least one of claims 1 to 8, characterized in that the localization of the workpiece ( 200 ) and / or on the holding element ( 210 . 212 ) applied maximum contact pressure by corresponding rotation of the first screw ( 30 ) and / or the second screw element ( 40 ) is in particular variably adjustable. Processing device ( 300 ), in particular a circular saw blade ( 330 ) associated Besäum- or sliding carriage ( 310 ) designed for at least one fastening means ( 100 ) according to any one of claims 1 to 9.