FR2511982A1 - IMPROVED ARM FOR STORAGE AND / OR RECOVERY DEVICES WITH ENDLESS ARTICULATED CHAINS AND PALLETS - Google Patents

Abstract

PERFECTED ARM FOR STORAGE AND OR RECOVERY DEVICES WITH ENDLESS ARTICULATED CHAINS AND PALLETS, OF THE TYPE AS DEFINED HEREIN, CHARACTERIZED IN THAT THE LINK AXLES OF SAID CHAIN 5 EACH CARRY AT LEAST ONE ROLLER 12 AS WELL AS ' A PALLET ATTACHMENT 9, THESE ROLLERS 12 BEING INTENDED TO GO THROUGH TRACKS 15, 16 PROVIDED FOR THIS EFFECT ON THIS ARM, WHILE PALLETS 6 ARE PROVIDED BETWEEN THEIR ENDS, AT LEAST ONE ROLLER 17 PARALLEL TO THE AXIS LONGITUDINAL OF THE SAID PALLET AND INTENDED TO ENTER BETWEEN TWO CENTERING GUIDES CARRIED BY THE ARM 3.

Description

The present invention relates to an improved arm for

  chain storage and / or recovery

articulated endless and pallets.

  Devices of this kind, often called scrapers, are generally used for the storage in heap of coal, phosphates and the like and / or for the recovery

materials thus stored.

  These devices are constituted by a mobile equipment intended to move, on rails or tracks, along the storage area. Said equipment is provided with a pivoting arm supporting two endless chains, which in turn support pallets normal to the arm, whose role is to push back the product to be stored or

  to resume We will find the description of such a provision

  tif, mixed in this case, in US Patent No. 4,018,323.

  In these known devices, the chains simultaneously fulfill four functions, namely: transmitting the traction necessary to move the pallets in the desired direction; support and maintain normal pallets at

  arm, despite the reaction of the product handled; now

  nir the pallets centered relative to the axis of the arm; and finally, bear their own weight as well as that of

  pallets The combination of these functions results in

  your important (traction and friction) sources of wear

  fast and high energy consumption.

  The object of the invention is therefore to provide an improved arm, in which said chains do not fill

that the only pull function -

  To this end, an arm according to the invention is characterized in that the axes of articulation of the links of said chains each carry a roller as well as a pallet attachment, these rollers being intended to traverse tracks provided for this purpose on said arm, while each pallet is provided, between its ends, with at least one roller parallel to the longitudinal axis of said pallet and intended to engage between two centered centering guides

by said arm.

  -2- For greater clarity, an exemplary embodiment of the invention is described below, with reference to the appended schematic drawings, in which:

  FIG. 1 represents a mixed device, that is to say

  say storage and recovery, equipped with an arm according to the invention; Figure 2 is a section, on an enlarged scale, along trace II-II of Figure 1;

  Figures 3 and 4 are enlarged views of the parts

  ties indicated respectively by F 3 and F 4 in Figure 2; and Figure 5 is an enlarged view along arrow F 5

in Figure 2.

  FIG. 1 has the sole purpose of showing a type of machine to which the invention is addressed. It is constituted by a mobile assembly 1 mounted on rails arranged along a storage area 2, above which s' reach out

  3 articulated at one of its ends on said crew 1.

  A transporter 4 can either bring products to be stored

  on arm 3, either evacuate the products taken up by it.

  As said above, more details on the construction

  tion and operation of this machine can be found

  See in U.S. Patent No. 4,018,323.

  The arm 3 supports two endless chains 5 carrying in turn pallets 6 The assembly being symmetrical with respect to the vertical plane containing the geometric axis of the

  arms, just describe one of the chains and the ele-

associated with it.

  A chain -5 is made up of links 7 mutual-

  articulated using axes 8 These are here

  longer than usual and their ends are threaded

  tees Pallet fasteners 9 are threaded on each axis 8, outside the chain 5, at a rate of two

attachments by axis.

  Each of these fasteners is constituted by a triangular-looking plate 10 (FIG. 5), the base of which is supported by two adjacent axes 8 One of the sides of -3- this plate 10 extends orthogonally to the direction of the geometric axis of the arm and this side is provided with a

  lip 11 for fixing a pallet.

  A roller 12 with sealed bearing is threaded on each axis 8 then safety nuts 13 come firmly

  block fasteners 9 and rollers 12 on their axes 8 respectively

  tifs. The pallets 6 each consist of a steel blade 14 with a substantially V-shaped cross section. The rollers 12 of the upper strand of the chain 5 roll on a flat track 15 provided for this purpose on the arm 3, while those of the lower strand roll in a profile

U-shaped 16 carried by said arm.

  Each pallet 6 carries in its center a roller 17 parallel to the longitudinal axis thereof The rollers 17 extend between two centering guides 18 and 19 provided

on the arm 3.

  The assembly thus described therefore makes it possible to use the chain only as a traction element and to apply to it a well-oriented stress. The large forces usually brought into the chain by friction are reduced in the ratio of the steel-to-steel friction coefficients to that of bearing bearings to

  balls, that is to say in the ratio of 1 to 10 approximately.

  It goes without saying that many modifications can be made to the example described above, without however departing from the scope of the invention, which extends to

  any machine equipped with an arm as described and claimed.

  Thus, the use of safety nuts can be replaced

  created by any other system, such as riveting, etc. Furthermore, the pallet attachments could

  constitute chain links, external or internal

laughing. -4-

Claims (8)

CLAIMS.   1. Improved arm for storage and / or recovery devices with articulated endless chains and pallets, of the type as defined herein, characterized in that hinge pins (8) of the links of said chains (5 ) each carry at least one roller (12) as well as a pallet attachment (9), these rollers (12) being intended to traverse tracks (15, 16) provided for this purpose on said arm (3), while pallets (6) are provided, between   their ends, at least one roller (17) parallel to the axis-   longitudinal of said pallet and intended to engage between   two centering guides (18, 19) carried by said arm (3).   2. Improved arm according to claim 1, charac-   terized in that the rollers (18) and pallet fasteners (9)   are carried by their respective axis (8) outside of the called chain.   3. Improved arm according to claim 2, charac-   terized in that each pallet attachment (9) is constituted by a triangular plate (10) whose base is intended to be supported by two adjacent axes (8) of a chain.   4. Improved arm according to claim 3, charac-   terized in that when said plate (10) is mounted on the chain, one of its sides extends orthogonally to the direction of the geometric axis of the arm (3), the plate (10) being further provided , along said side, a lip (11)   intended for fixing a pallet (6).   5. Improved arm according to claim 3 or 4, characterized in that two fasteners (9) are provided for each end of the pallet (6).   6. Improved arm, characterized in that each   pallet (6) consists of a steel blade (14) pre-   feeling a substantially V-shaped cross section   7 improved arm according to claim 1, charac-   terized in that each of the rollers (12) mentioned is of sealed bearing type. -   8. Any device or device for storage and / or storage   socket, equipped with an arm according to one or more of the res- dications 1 to 7.