FR2745281A3 - Crane handling tool for scrap metal - Google Patents

Abstract

The tool has electromagnetically operated hydraulic clamping devices and a support arm (2) for securing to the crane, coupled to the axis of a disc- shaped base (4). This supports an annular electromagnet and pivot linkages for radial shovels (5), with the hydraulic cylinder (1) extending at an angle to the support arm. The electromagnet is incorporated in the base, coaxial to the support arm and is enclosed by a bottom cover fitted to the underside of the base, which has adjustable stops on its upper side for the movement of the pivot linkages

Description

ARTICULATED TOOL FOR PICKING UP FERROUS METALS

  The present invention relates to an articulated tool with hooks for collecting ferrous metals, this tool being of the type which includes an arm for fixing to a crane, this arm being connected to a discoidal support which supports electromagnets and the joints gripping hooks arranged radially. There are different gripping tools attached to a crane for handling various objects, some of these tools having a specific design

  for the selective collection of ferrous metals.

  Generally, these tools are equipped with several electromagnets and auxiliary articulated arms to retain, during lifting and transport, a ferrous material which has been attracted by the electromagnets which are arranged in concentric circles relative to to the axis of the disc support and

  whose number is never less than three.

  Some of these tools have articulations with hydraulic cylinders with connecting rods

  articulated at their ends, and whose electro-

  magnets are located on the discoid support o

  articulate the gripping hooks.

  The Applicant is unaware of the existence of tools having gripping hooks comprising stops, these hooks being articulated directly by hydraulic cylinders and without interposition of articulations for the cylinders, with the presence of external protective elements of the telescopic rods

2 2745281

  cylinders, and which are equipped with a single electro-

  magnet. Under these conditions, the invention aims to protect an articulated tool for collecting ferrous metals, of the type of tools with several hydraulic hooks, with electromagnets and having an arm for fixing to a crane, a tool which is connected to a disc support, along the axis of the latter, which supports electromagnets and the articulations of the radial gripping hooks, tool which is characterized in that it comprises hydraulic cylinders, which are inclined relative to the fixing arm to the crane, and external protective elements of the rods of the cylinders, in that the discoidal support is provided with a lower cover and includes a single annular electromagnet which is coaxial with the fixing arm, and in that the support discoidal includes supports for direct articulation of the gripping hooks which are fitted with

  sliding or upper guide.

  Thus, the presence of hydraulic cylinders with elements of external protection of the rods of the cylinders, the presence of upper stops on the gripping hooks, as well as the discoidal support with a single electromagnet, characterize in particular

this invention.

  In general, this tool provides direct articulations of the gripping hooks, these hooks being generally spaced 900 apart and located on the outer edge of the discoid support, said hooks having a projecting stop which comes into contact, at

3 2745281

  hook attachment level, outer ring

  formed by the common disc support.

  The hydraulic cylinders start from the proximity of the upper end of the arm and transmit to it the load located near the external edge of the discoid support, these cylinders being simply equipped with external protective elements of

their stems.

  Advantageously, these protective elements protect the rods at the weakest point and the most exposed to unforeseen impacts against objects during handling of the load, impacts which would not allow the oblique extension of the lower part of the rod. cylinders, taking into account its position at the end of the articulation of the hooks

  clamping and holding of ferrous materials.

  The invention is also characterized by the method of manufacturing the discoidal support with the articulation supports for the gripping hooks, this discoidal support comprising a single annular electromagnet extending around the link arm with the crane. Other advantages, characteristics and details of the invention will emerge from the addition of

  description which follows with reference to drawings

  attached, given only as examples and in which: - Figure 1 is a front view of the tool according to a preferred embodiment of the invention

4 2745281

  to illustrate in particular the hydraulic cylinders with their respective protective elements, - Figure 2 is a top view with partial cutaway of the discoidal support comprising the electromagnet, and Figure 3 is a sectional view along the

line III-III of Figure 2.

  According to the above, the invention relates to an articulated tool for picking up ferrous metals. This tool is of the type of those with several hydraulic hooks, with electromagnets and which have an attachment arm 2 to a crane, this arm 2 having an upper end which is fixed to the crane, while its lower end is connected to a disc support 4 along the axis of the latter. This discoid support 4 supports electromagnets and on which the radial gripping hooks 5 are articulated, this support 4 also forming a stop.

  for ferrous materials grabbed by the hooks 5.

  According to the invention, the hydraulic cylinders 1 are inclined or extend obliquely relative to the arm 2, and the tool comprises external protective elements 3 of the rods 2 'of the cylinders 1, as well as stops 5' of sliding or upper arm guide

gripping 5.

  The disc support 4 is also equipped with supports for direct articulation of the hooks 5, this disc support 4 comprising a single annular electromagnet 6 which is coaxial with the arm 2 and comprises a lower access cover 7 which is attached by welding.

  The above description is sufficient to

  allow the skilled person to understand the scope of the invention and its advantages, and gives the information

  necessary for the realization of such a tool.

  Of course, the invention is not limited to the preferred embodiment which has been given only by way of example, and includes in particular all the variant embodiments of the means described above.

  and which fall within the scope of the invention.

G6 2745281

Claims (1)

  1. Articulated tool for collecting ferrous metals of the type of tools with several hydraulic hooks, with electromagnets and having an arm for fixing to a crane, tool which is connected to a discoidal support which supports electromagnets and the joints of the radial gripping hooks, characterized in that it comprises hydraulic cylinders (1), arranged obliquely or inclined relative to the fixing arm (2), with elements (3) for external protection of the rods (2 ' ) cylinders (1), in that the disc support (4) is provided with a lower cover (7) and includes a single annular electromagnet (6), coaxial with the fixing arm (2), and in that that the disc support (4) comprises supports for direct articulation of the hooks (5) provided with   sliding or upper guide stops (5 ').