Conveyors: power-driven – Conveyor for changing attitude of item relative to conveyed... – By conveying randomly faced items and turning items to...
Patent
1980-02-13
1983-01-25
Hill, Ralph J.
Conveyors: power-driven
Conveyor for changing attitude of item relative to conveyed...
By conveying randomly faced items and turning items to...
198771, 198953, B65G 4714, B65G 4724
Patent
active
043698743
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention concerns a device for disentangling entangled components.
BACKGROUND ART
Large quantities of small items or components are very frequently used in processing and production plants. These may be wire components such as C-shaped snap rings, hook-shaped components, etc. It is known that they have a strong tendency towards entanglement and that they easily pile up in a cluster. Therefore, such components are generally termed tangled components (Guideline 3237 of the Association of German Engineers; Design of Finished Components with Regard to Automatic Feeding, Finishing and Assembling, page 1, Dusseldorf 1967).
As experience has shown, the isolating process of such tangled components is rather difficult. The attempt to remove individual components from the pile regularly results in the removal of a whole bunch of components which may consist of several hundred, usually very light-weight items. Owing to the fact that the items usually are jammed, hooked up or magnetic, the bunch is held together. An operator spends a great deal of time isolating tangled components for processing.
Automatic disentangling devices for isolating entangled components have been publicized by the magazine f+h-fordern und heben 27, (1977), issue 10, technical section mht, pp. 82-86, particularly picture 10 and 11 on page 85. At the so-called "brush-type discharge bin" the entangled components are dropped into a box-type funnel-shaped bin. A discharge outlet is situated at the bottom of the funnel-shaped bin, in which a cylinder-shaped revolving brush has been installed. By means of a drive the brush oscillates at an adjustable cycle and at a determinable angle. Owing to the bristles the pile is tossed to and fro, disentangled, and then discharged from the bin by means of the brush. In this case the disentangling process is effected partially by the impact on the bin wall, and partially due to the shearing effect of the brush (pile is being pulled apart).
Furthermore, the known "drum-type disentangler" consists of an unilaterally enclosed drum rotating a constant speed and which pushes the pile up via the lateral ribs and discharges it at the drum's center. During this process several components loosen; they then may fall through a support cross attached to one side of the drum, preventing the pile from dropping out.
However, the known disentangling devices are relatively susceptible to fault and may not always operate with optimal efficiency. They frequently tend to jam the "brush-type discharge bin." Frequently only a small bunch consisting of several entangled components loosens from the pile. When this small bunch is grabbed by the cylindrical brush, so as to be ejected through the outlet situated at the bottom of the bin, it may jam between the brush and edge of the outlet. Then the machine must be switched off, and the operator has to remove the jammed bunch from above. This is rather complicated because, in order to clear the outlet, the entire top of the pile has to be removed from the bin. The known device is therefore less advantageous.
On the other hand, if the above-mentioned bunch has nevertheless been ejected by the brush, one is faced with the disadvantage that the components are not entirely isolated. This fault must be corrected manually, or the bunch has to be returned to the bin.
Re-entanglement can be considered a further disadvantage. This means that, due to impact on the walls of the bin, disentangled components become re-entangled. It has been proved that known devices have a high degree of re-entanglement, which obviously is a negative aspect of the disentangling process as a whole.
Furthermore, the known disentangling devices are hardly flexible as they are only suitable for very few and specific types of components that are to be isolated. This is so partly because of the given dimension of the bin, and partly because of the given brush format. In order to disentangle components of varying sizes, devices of varying dimensions are required.
DISCLOSURE OF THE INVENTION
The t
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"Guideline 3237 of the Ass'n. of German Engineers; Design of Finished Components With Regard to Automatic Feeding, Finishing and Assembling", Dusseldorf 1967, p. 1.
"Handhabung Von Wirrteilen," Fth-Fordern und Heben 27, Issue 10, 1972, pp. 82-86.
"Verkettungseinrichtugen in der Fertigungstechnik," Published by Carl Hansen Verlag, Munich, 1971, pp. 75 and 125.
"Boothroyd et al., "Mechanized Assembly", McGraw-Hill, London, 19th, pp. 23 and 81.
Hutter Odo
Kettner Hans
Chickering Robert B.
Grunewald Glen R.
Hill Ralph J.
Warren Manfred M.
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