Cutting – With product handling means – Means to move – guide – or permit free fall or flight of product
Patent
1998-09-28
2000-11-28
Rachuba, M.
Cutting
With product handling means
Means to move, guide, or permit free fall or flight of product
83 73, 83405, 839291, 839292, B26D 700
Patent
active
061520063
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device as claimed in the preamble of patent claims 1, 5, 21 or 27.
Devices for conveying small components and especially also small electrical components, for example in the form of SMDs (surface mounted devices), are known in the most varied versions and are used for example in devices or systems in which these components are processed (for example, bending of connecting leads), measured (especially also with respect to their electrical properties and functions), deposited sorted (batch formation) and/or belted. These devices are also often called bag-and-line or bag-and-machines.
The object of the invention is to devise a device for conveying small components which can be repeatedly used in a simple version and/or has high operating reliability. To do this a device according to claim 1, 5, 21 or 27 is devised.
In one basic version of the invention the device has at least two transport elements which adjoin one another within a common conveyance section on a connection region, the components on this connection region being relayed from receiving areas of one transport element to the receiving areas of the other transport element. The receiving areas on one transport element are formed here by vacuum chucks, preferably pipette-like vacuum chucks. The receivers on the other transport element are formed by one surface of this transport element, each in the region of one opening. The transport element which is formed by a transport belt or transport wheel lies with its other surface side on a guide which has at least one vacuum channel open towards this surface side. The transport belt or transport wheel seals this vacuum channel except for the openings in the transport belt or transport wheel. The vacuum channel is connected to a negative pressure source so that the components are each held under pressure in the area of one opening. In conjunction with the formation of the receiving areas on one transport element in the form of pipette-like vacuum chucks, simple transfer of the components from one transport element to the other is possible.
According to another aspect, the invention relates to a device for conveying small components, this device being suited especially for feeding components in a system in which the components to be treated are supplied in a lead frame. Especially in multiple lead frames, i.e. in lead frames in which the components are located in several rows which extend in the longitudinal direction of the lead frame, the problem is that the machine spacing, i.e. the distance which the receiving areas of the treatment machine (for example, back-end machine) must be adapted to the grid size of the lead frame, i.e. to the distance which the components have from one another in the longitudinal direction of the lead frame [sic]. It is therefore difficult to process lead frames with a different grid size using the same machine. The device as claimed in the invention avoids this problem, i.e. solely by changing the advance for the lead frame can the device be adapted to different grid sizes. The change necessary for this purpose can be done using software.
According to another aspect, the invention relates to a device for conveying small components, especially small electrical components, preferably SMDs, with at least one transport section formed by a transport element with a plurality of holders made preferably as vacuum chucks for the components, and the holders which are moved preferably clocked along the transport section with the transport element can be moved in the direction of their axis, preferably in a vertical axis. This device is characterized in that there are holders which can turn around their axis on the transport element and that on the transport section at least one turning or rotation station is formed, on which the holders are moved past and on which a driver actuated by a drive can be coupled to the holder at this turning station at the time and can be actuated to rotate the holder.
According to another aspect, the invention relates to a device fo
REFERENCES:
patent: 4908092 (1990-03-01), Koibuchi
patent: 4914996 (1990-04-01), Lavorel
patent: 5058721 (1991-10-01), Koibuchi
patent: 5135098 (1992-08-01), Koibuchi
patent: 5397423 (1995-03-01), Bantz et al.
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