DE7807597U1 - SEALING PLIERS - Google Patents

Description

SIEMENS AKTIENGESELLSCHAFT Our mark

Berlin and Munich VPA 78 P 3 0 4 2 FRG

Sealing pliers

The invention concerns a sealing pliers in which two Tong lever standing under spring coil rotatable in one Pliers shoe are stored and the force for deforming the seal by one attached to the one pincer lever Pressure roller is transferred via an insert attached to the other caliper lever.

Sealing pliers of this type are known for example from DE-PS 461 423 and DE-AS 10 15 749. By The curve-shaped design of the insert attached to the one caliper lever can be the pressure curve and the Way to deform the seal can be influenced accordingly. The disadvantage of the known Plüiabierzangen that the Force required to deform the seals is relatively large, so that when working for a long time with such a sealing pliers severe signs of fatigue occur in the operator.

6.3.1978 / Hs 2 nit

-2- VPA 78 P 3 O H 2 FRG

The invention is based on the object of improving sealing pliers of the type described at the outset in such a way that that the effort required to deform the seals can be reduced. This task is carried out according to the invention achieved in that the pressure roller is provided with a roller bearing. This creates sliding friction converted into a roller / β friction between the roller and the insert. The roller bearing then takes over the Function of an additional (rolling) knee joint. By adapting the curve on the insert piece, the required Force can be kept almost constant over the entire path.

Using the drawing, in which an exemplary embodiment is shown, the invention is explained in more detail. Show it:

Figure 1 a sealing pliers in the open state and FIG. 2 in the closed state;

FIG. 3 shows the force required to deform the seals as a function of the path.

With 1 and 2, the two caliper levers are referred to, the are rotatably mounted in a pincer shoe 3 with the aid of screw bolts 4 and 5. In the pincer shoe 3 is one Die half 6 is screwed in, while the other die half 7 is attached to the upper end of the pliers lever 1 is. By means of a compression spring 8, the two die halves 6 and 7 are separated from each other so far that that a seal, not shown, can be inserted in the gap. This position is through a Roller 9 limited, which is rotatably mounted on a bolt 10 with the aid of a roller bearing 13. The pressure roller 9 cooperates with an insert piece 11 attached to the pliers lever 1, which is attached to that of the pressure roller 9 facing side is curved.

-3- VPA 78 P 3OU BRD

If the two caliper levers 1 and 2 are released, the pressure roller 9 under the action of the spring 8 is the Assume the position shown in Figure 1, the pincer lever 2 is pivoted so far that the pressure roller the lowest point of the curve 12 on the insert 11 occupies.

For sealing is ^{inserted between the die halves 6 and a J} lombe and the two pliers levers 1 and are pivoted to each other. Here, the pressure roller 9 slides up along the curve 12 and pivots the pliers shoe 3 about the bolt 4 in a clockwise direction, so that the two die halves 6 and 7 approach each other. In the end position, the two die halves 6 and 7 then assume the position shown in FIG. The pressure roller 9 is then located at the uppermost end of the curve 12 of the insert 11.

By appropriately designing the curve 12, the force required for sealing can be approximately over the entire path be kept constant. As can be seen from Figure 3, increases in the known sealing pliers the force required to deform the seals as a function of the way is steady, as curve a shows. As curve b in FIG. 3 shows, corresponding Shape and, due to the rolling friction, the force required to close the pliers is small and approximate be kept constant. The force required to deform the seals can be reduced with the sealing pliers according to the invention with roller bearing 13 in the most extreme case from 15kp to 3.5kp be reduced. A needle bearing is preferably used as the roller bearing.

VPA 78 P 3 0 ^ 2 FRG

summary
Sealing pliers

In the sealing pliers according to the invention, the force for deforming the seal is applied by one of the pliers lever attached pressure roller Transfer via an insert attached to the other caliper lever. To the To reduce friction, the pressure roller is equipped with a roller bearing.

Claims (2)

-4- VPA 78 P 3 O 4 2 BRD 1) Sealing pliers, two of which are under spring action Pincer levers are rotatably mounted in a pincer shoe and the force to deform the seal through one on the transfer a pressure roller attached to a pincer lever via an insert attached to the other pincer lever is, characterized in that the pressure roller (9) is provided with a roller bearing (13) is. 2) sealing pliers according to claim 1, characterized in that that the insert (3) has such a curve shape (12) in cross section that approximate the force required to deform the seal is constant.