DE1502919A1 - Semi-automatic clamp - Google Patents

Description

The invention has a clamp for clamping or clamping workpieces on processing machines or from tools of any kind in machines to the object, through automatic movements in horizontal and vertical direction when tightening or loosening the Bride avoids any contact with the clamped object that could cause it to move.

Clamping elements for clamping and clamping workpieces and tools on and on machines are known in large numbers and in a great variety of designs. These clamping elements have regularly the disadvantage that they have to be brought into the clamping position by hand before clamping. Included An unwanted and often unnoticed shift can often be made even by the experienced skilled worker Do not avoid the workpieces to be clamped. Furthermore, the use of such tensioning elements is on Often not possible for places difficult to reach by hand or increases the risk of improper use Treatment of the workpiece. These disadvantages are particularly common in precision engineering as well as in all technical Operations in which clamping operations with an accuracy of fractions of a millimeter must be made, of great importance.

The subject matter of the invention avoids these disadvantages, since the clamp initially moves automatically into the horizontal end position when it is clamped before it touches the workpiece, before it touches the workpiece vertically and clamps it. When you loosen the clamp, you move it

909 * 26/0148 '

first vertically away from the workpiece to then to automatically return to the horizontal starting position. A touch of the bride herself with the Hand or hand-guided tools, through which uncontrolled or uncontrollable position influences of the workpiece are possible is excluded. This makes it possible Clamp clamps can also be used in inaccessible and inaccessible places, provided that only the clamping screws are used are accessible to tools.

Using an exemplary embodiment, which can be seen from the drawing attached to the description is, the invention is explained as follows:

Fig. 1 shows a work table 1 on which a workpiece 2 by the clamp 3, by tightening the screw 5 in the fixed on the work table Pad 4, is attached. Fig. 2 shows the clamp in the starting position. Fig. 3 shows the Bride in position before clamping the workpiece.

The clamp is in the starting position by resting its rear edge or surface 11 on the inclined plane 14 of the base 4, by the bolt 6 executed from the clamp by means of the pressure of the spiral spring 8, which by means of the pressure of the spring 9 i ⁿ the end position against the in the pad k tight screw 5 pressing bolt 7 and the guide slot 10 for the screw 5 held. By tightening the screw 5, the clamp moves downwards, with a horizontal displacement at the same time due to the sliding of the edge or surface 11 of the clamp on the inclined plane Ik of the base

909825 / 0U8

the clamp in the direction of the guide slot 10 enters towards the workpiece. Since the spiral spring of the bolt 6 is designed stronger than that Spiral spring 9 of the bolt 7, hears the downward movement of the clamp parallel to the base with increasing Counterpressure of the spring 8. The edge 11 slips into the end position of point 13 of the Document. The clamp is now at an acute angle to the base above the workpiece. By far Tightening the screw 5 closes this angle until the clamp extends the workpiece vertically touched and clamped at the top. When loosening the screw 5, this process takes place in reverse order away. By means of the spring pressure 8, the clamp is first described as an angled arc lifted about the pivot point 13. When the pressure of the spring 8 is released, the spring takes effect in action and enables the horizontal displacement of the clamp in the direction of the guide slot from Move the workpiece to the starting position of the clamp.

A ball is advantageously mounted in the bolts 6 and 7 to prevent the clamp from moving in other than the bolt direction to reduce the friction of the bolts on the base or on the screw.

The horizontal and vertical movements of the clamp can be evenly adjusted depending on the intended use or can also be provided independently of one another. So can the vertical movement by using a longer bolt 6 and a more extended spring 8 compared to the constant Horizontal movement can be enlarged. With the same

909825 / QU8

-A lack of vertical movement, the horizontal movement can be changed by changing the spring 9ι but also by changing the angle 12, which is formed by the inclined plane Ik and the base »

909825/0148

Claims (1)

Claims Semi-automatic clamp for opening and closing clamping of workpieces and tools on solid supports, which are in a starting position that does not hinder the insertion of the workpiece is maintained and which, when tightening the clamping screw, first move horizontally over and then vertically the workpiece moves or, when the clamping screw is loosened, first vertically and then moved horizontally away from the workpiece, characterized in that the base is a partially inclined support surface forms and the Bride with a vertically mounted and a horizontally mounted spring bolt and a guide slot for the clamping screw is. Clamp according to claim 1, characterized in that the tension of the vertical spring bolt is greater than the tension of the horizontal spring bolt 3 · Clamp according to claim 1 and 2, characterized in that a ball is embedded in the bolt ends is· 909825/0148 Blank page