Devices for holding workpieces

Abstract

A device for holding workpieces. The device is used to hold workpieces and is configured like a pliers and is provided with two pliers arms ( 45 , 46 ). The pliers arms are held by a pliers base (47) and can be arranged in at least an open position and a closed position. The base of the pliers is held by a bottom element (48). The pliers base is arranged on a transfer wheel, wherein an opening movement of the pliers arm takes place with a movement component transverse to the radial direction of the transfer wheel. A first pliers arm ( 45 ) extends at least in regions on both sides of a center line of the pliers base oriented in the radial direction of the transfer wheel. The second pliers arm ( 46 ) delimits a holding recess for the workpiece, which is at least partially spread by the pliers arm, only in the region of the holding recess ( 68 ) that is relative to the holding recess A transverse center line extending transversely to said center line is arranged on the outside in the radial direction of the transfer wheel.

Description

technical field [0001] The invention relates to a device for holding a workpiece, which is configured in the form of a pliers and is provided with at least one first pliers arm and a second pliers arm, and in which device the pliers arms are formed by a pliers base hold and can be arranged at least in an open position and a closed position, and in the device, the pliers base is arranged on a transfer wheel, wherein a movement of the pliers arm with a radial direction transverse to the transfer wheel is carried out Component opening movement. [0002] The invention also relates to a device for blow molding containers, which has at least one blow molding station with a blow mold and at least one carrier element for positioning preforms along a transport path. In this case it can be provided that the carrier element is held by a rotating transfer wheel, the carrier element is mounted movably relative to the transfer wheel, and that a curve control device for the carrier element ...

AI Technical Summary

Problems solved by technology

[0010] The problem with the use of such transfer wheels provided with load-carrying elements is to avoid serious damage in the event of mechanical disturbances, especially in the event of a collision

A corresponding positioning device, however, entails relatively high costs and increases the structural weight of the transfer wheel, resulting in an increased inertial behavior

[0012] In DE 10 2007 054 388 a pliers-like retaining element has been described which is deflectably held in the region of the carrier under the action of an overload, but this relates to a structure which takes into account the number of required structural elements Proven to be expensive and therefore only conditionally suitable for use in large quantities

[0013] Another problem when using conventional pliers-like holding elements is that an undesired opening movement of the pliers cannot be ruled out when lateral forces act on the workpiece to be manipulated

However, a brief opening of the pliers can cause the workpiece to be lost and thus lead to disruptions in the production process

[0014] In the production of blow-molded containers using pliers-like holding elements according to the prior art, the problem arises in certain production sequences that the container sticks to one of the mold halves when the blow mold is opened.

This type of attachment can lead to the aforementioned unwanted opening movement of the pliers

Images