Handling: hand and hoist-line implements – Article carrier gripped and carried by hand – Configured for complimentary projections on package or article
Patent
1984-01-12
1986-04-29
Cox, Ronald B.
Handling: hand and hoist-line implements
Article carrier gripped and carried by hand
Configured for complimentary projections on package or article
294 88, 425436R, 164404, 414744A, 414 30, B25B 100
Patent
active
045852600
DESCRIPTION:
BRIEF SUMMARY
The present invention concerns robot-type manipulators.
More precisely, the present invention concerns a device particularly for articles of synthetic material, for a robot-type manipulator.
As is described in particular in French Patent Application No. 2,424,797, devices for gripping articles for robot-type manipulators proposed up to now are formed with gripping pliers. Such pliers generally have at least one articulated jaw and a fluid controlled actuating element. One or each articulated jaw is maintained in open or closed position by means of a spring and can be opened or closed by the actuating element.
Such arrangements permit certain gripping and holding of the article with a sensitively controlled force, whilst one may easily understand that, on the one hand, such pliers do not permit gripping of the article, at the exit from a mould, in a precise position, and on the other hand, do not permit in consequence, transference of this article to a precise position. In effect, such pliers are susceptible of gripping the article whatever the position of it.
In particular, in the case of moulding of parts in synthetic material, those which generally present themselves, at the exit from the mould, in the form of an elongated support collar, of generally truncated conical shape, at one of its ends from which is connected substantially perpendicularly a plurality of rods on which are attached, by means of thin easily breakable fingers, the said articles in question. Thus, in the case where the said parts must be lifted together in the mould with precision, and possibly displaced therein for removal from the mould, and then brought into a precise predetermined position, the existing pliers cannot give satisfaction. In fact, these are apt to grip the said truncated conical collar, at any position, and according to whatever inclination, and further, once gripped, the parts are susceptible of pivoting between the two jaws, with the result that it is quite impossible to know with precision the position of the part with respect to the pincers.
This problem is posed in particular, when the said parts in moulded synthetic material have screwed portions; one may easily understand that in such a case, it will be necessary to obtain a particularly precise position of these parts.
The need is therefore felt to arrange article gripping members, in particular, articles in synthetic moulded material, for robot-type manipulators, which are at the same time of simple, robust and economic form, and which produce a precise positioning of articles. On the other hand it will be advantageous that the said gripping members are adaptable to the previously existing robot-type manipulators.
The present invention eases the situation on this point by proposing a device for gripping articles for robot-type manipulators consisting of a part susceptible of being joined to the end of an arm of the manipulator, and which is provided with a first, generally flared orifice, intended to receive a part with a substantially corresponding shape of the article to be gripped, and with a second orifice extending substantially perpendicular to the first orifice, and opening into the latter, as well as a rod inserted in the second orifice in which it is free to slide, displacement of the said rod being controlled by the manipulator so as to bear against the portion of the article inserted into the orifice and to prevent it from moving.
The gripping device according to the invention, on the one hand permits easy gripping of the part in the mould, and this with precision, and on the other hand maintains this fixedly in a constant relative position, with the result that the part can be ultimately transferred into whatever precise predetermined position is chosen.
According to an advantageous embodiment of the present invention, the first orifice consists of a first truncated conical section strongly flaring, open towards the outside of the part, at the side of which the portion of the article is introduced, and a second truncated conical section coaxial
REFERENCES:
patent: 1612495 (1926-12-01), De Long
patent: 2722450 (1955-11-01), Nelson
patent: 3354942 (1967-11-01), Todd et al.
patent: 3995420 (1974-03-01), Preston
Cox Ronald B.
Societe Invo Plastic S.A.R.L.
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