DE19540786A1 - One-handed quick clamping screw clamp - Google Patents

Abstract

The operating lever (18) for the quick clamping process of the sliding yoke (14) is located between the rail (26) and spindle handle and is mounted like a rocker on a pivot (20) on the auxiliary sliding yoke (16). The operating lever on both sides lifts the sliding yoke above the roller pivot points (22,24) so that an operation of the quick clamping lever is possible both during gripping of the hand barrel of the spindle handle (28) and during gripping of the rail. The operating lever may oscillate, to and fro, behind the handle having a gripping surface that may be, ideally, a double-T-cross section.

Description

The invention relates to a screw clamp as in claim 1 of protection claims is described. It has a mechanism for quick Moving the slide bracket of a screw clamp and one Possibility of tensioning the pre-tensioned goods preferably via a screw force the usual spindle to tighten.

DE 41 04 769 A1 and DE 41 04 563 A1 are quick-release rail clamps announced that only offer the possibility of using workpieces low tension. For a firm tensing is then a second tool required.

G 8703379.8 describes a clamping tool in which a clamping bolt used to move, as with commercially available soft cartridges usual for conveying the cartridge pushrod.

Operation for closing and opening the aforementioned devices takes place in most cases like a pistol at right angles to the guide Rail or clamping bolt or parallel to the rail.

For these devices described with DE 38 13 768 A1 and DE 40 28 274 A1 Tools announced that also for quick adjustment the possibility also provide the clamping force on the via a spindle To enlarge the workpiece without attaching a second screw clamp have to.

The version according to DE 38 13 768 A1 has the quick adjustment before the Füh guide rail towards the pressure plate, but the spindle obliquely to the guide rail running behind the guide rail.

In the embodiment according to DE 40 28 274 A1, the actuators are also on both sides of the rail, only the spindle as inside a screw clamp half and the quick adjustment at right angles to the rail outside arranged.

It has another ferrule made known by U.S. Patent 4,989,847 both inside, but you have to grasp the rail once to operate and to tighten the wooden handle with the spindle.

With all previously available quick clamps, these improved  A more universal way is to move the hand when changing the instep organs necessary, the hand cannot be left on the workpiece, if the generally low clamping force is not sufficient to hold.

P 36413 describes an invention in which quick adjustment is possible speed in the immediate vicinity of the wooden handle, which serves to adjust the spindle, is placed so that when gripping the wooden handle an operation of the quick adjustment is possible. The lever for quick adjustment is therefore demented designed ergonomically.

A type of actuation also shown in P 36413 from the rail ( Fig. 2) with a lever ratio A <B in many cases allows easier handling, such as the version requested for protection there with a lever ratio A <B or the roller center of the lever not between The rail and pivot point of the auxiliary slide bracket is located and actuated from the spindle on the handle side.

Since, as mentioned, both types of actuation for a universal application of Are interested, this invention is based on the task of a one-handed To create quick release screw clamp, in which the actuation of the quick tension lever both when reaching around the rail and when reaching around of the handle is possible.

The embodiment of the invention is shown in Fig. 1 as follows: It shows a screw clamp designated as a whole with ( 10 ), consisting of a fixed bracket ( 12 ) and a slide bracket ( 14 ), an auxiliary slide bracket ( 16 ) and a lever ( 18 ).

The lever ( 18 ) is responsible for the stroke after the auxiliary slide bracket ( 16 ) has tilted. It is created by operating the lever ( 18 ) and turning it around the pivot point ( 20 ) of the auxiliary slide bracket ( 16 ). The lever ( 18 ) is now designed so that it has a roller pivot point ( 22 ) and ( 24 ) on both sides of the pivot point ( 20 ) at a distance B and C with mounted rollers ( 23 ) and ( 25 ) for contact with the slide bracket ( 14 ).

Depending on the direction of actuation of the lever ( 18 ) from a central position ( 30 ), it is moved towards the rail ( 26 ) towards a position ( 32 ) or towards the spindle handle ( 28 ) towards a position ( 36 ). In both cases, the slide bracket ( 14 ) is pushed over the roller pivot points ( 22 ) and ( 24 ) by the stroke 1 or stroke 2 upwards. The energy accumulator H pulls the relieved auxiliary slide bracket ( 16 ) according to the respective stroke.

The actuating lever ( 18 ) is provided with grip surfaces towards the rail ( 26 ) and towards the spindle handle ( 28 ), preferably with a double-T cross-section ( 19 ). For visual identification, the lever ( 18 ) can have finger grooves ( 40 ) to ( 43 ) in the upper region and finger grooves ( 50 ) to ( 53 ) in the lower region.

This division into the grip areas corresponds approximately to the normal position of the spindle handle ( 28 ). An additional bend in the area ( 56 ) results in a symmetrical angular position of the lever ( 18 ) as shown with the central axes ( 60 ) and ( 62 ).

Depending on the choice of lever ratio A: B and A: C, stroke 1 and stroke 2 are created to move the slide bracket ( 14 ) after the auxiliary slide bracket ( 16 ) has tilted on the rail ( 26 ) against the action of the energy accumulator H.

Claims (4)

1. One-hand quick release screw clamp with a fixed bracket ( 12 ) with Füh guide rail ( 20 ) and a slide bracket ( 14 ) with a spindle handle ( 28 ) which is guided on the rail ( 20 ) longitudinally displaceable and can be fixed on it by tilting and with a mechanism comprising a housing ( 36 ) consisting of an actuating lever ( 18 ), an auxiliary slide bracket ( 16 ), and at least one energy accumulator ( 38 ) for overcoming the stroke of the auxiliary slide bracket ( 16 ) after the slide bracket ( 14 ) has been lifted in by the lever ( 18 ) Clamping direction was shifted, characterized in that the actuating lever ( 18 ) for the quick clamping process of the slide bracket ( 14 ) is arranged between the rail ( 26 ) and spindle handle ( 28 ) and is mounted like a rocker in ( 20 ) in the auxiliary slide bracket ( 16 ) and on both sides Raises the slide bracket via the roller pivot points ( 22 ) and ( 24 ), so that actuation of the quick-release lever ( 18 ) both when gripping the ball of the thumb with your thumb of the spindle handle ( 28 ) as well as when embracing the rail ( 26 ) is possible. 2. One-hand quick release screw clamp according to claim 1, characterized in that the actuating lever ( 18 ) to the rail ( 26 ) and the spindle handle ( 28 ) is provided with gripping surfaces, preferably in double T cross-section. 3. One-hand quick release screw clamp according to claim 1 and 2, characterized in that on the actuating lever ( 18 ) for the finger position when operating the quick release lever on both sides finger notches ( 40 ) to ( 43 ) and ( 50 ) to ( 53 ) are provided. 4. one-hand quick release screw clamp according to claims 1 to 3, characterized in that finger grooves ( 50 ) to ( 53 ) are provided in the lower region on the actuating lever when reaching around the spindle handle ( 28 ) away from the spindle handle and when reaching around the rail ( 26 ) away from the rail finger notches ( 40 ) to ( 43 ) in the upper region of the actuating lever ( 18 ).