US2220097A - Transfer arm - Google Patents

Description

Nov. 5, 1940. J R. GREER 2,220,097

TRANSFER ARM Original Filed April 22, 1938 Fly] - nyz Patented Nov. 5, 1940 PATENT OFFICE TRANSFER ARM Agnes J. Reeves Greer, Morgantown, W. Va.

Original application April 22, 1938, Serial No.

2 Claims.

The invention relates to transfer arms for use in apparatus for pickling coils of metal, of the general type of machines disclosed in my prior Patent No. 2,091.921, issued August 31, 1937, and

the present application is a division of my oopending application for Pickling machines, Serial No. 203,507, filed April 22, 1938.

Machines of the general type referred to provide for the pickling of coils of metal supported upon mandrels which are progressed through pickling and washing tanks, and the present invention relates to transfer arms for transferring the mandrels with the coils thereon from one tank to the next succeeding tank or for removing the mandrel and coil from the last tank.

The object of the improvement is to provide arcuate surfaces upon the transfer arms in order to retard the movement of the mandrel across the transfer arms as the arms are operated.

A further object is to provide arcuate transfer arms with toothed tracks for engagement with sprockets or gears upon the mandrels.

The above objects together with others which will be apparent from the drawing and following description, or which may be later referred to, may be attained by constructing the improved transfer arms in the manner illustrated in the accompanying drawing in which- Figure 1 is a fragmentary top plan view of the adjacent ends of two adjoining tanks of a pickling machine showing'the improved transfer arms for removing the mandrel and coil from one tank and charging them into the adjacent tank;

Fig. 2, a side elevation of the parts shown in Fig. 1;

Fig. 3, an enlarged fragmentary elevation partly in section of one of the transfer arms showing the curved toothed track thereon; and

Fig. 4, a further enlarged transverse sectional view taken as on the line 44, Fig. 3.

Similar numerals refer to similar parts throughout the several views.

The discharge end portion of a pickling tank is indicated generally at l0, and the charging end portion of the first washing tank is indicated at H.

Rails l2 may be mounted above the pickling tank l0 forming a track upon which the mandrels may be rotated as they are progressed forwardly along the tank so that the coils suspended thereon may be rotated through the acid in the tank as disclosed in my prior application above referred to.

The mandrel is in the form of a shaft l3 having a roller l4 fixed near each end thereof and Divided and this application March 13, 1939, Serial No. 261,493

adapted to travel upon the'corresponding rail 12.

A sprocket wheel or gear l5 may be fixed upon each end portion of the mandrel shaft l3 and is adapted to travel upon the toothedtrack as disclosed in my co-pending application Serial No. 5 203,507 of which this is a division.

Each sprocket wheel i5 is adapted to be engaged by an endless drive chain l6 located over sprockets ii at opposite ends of the pickling tank and adapted to be continuously driven in unison by means of the gearing indicated at 18 and the motor 19, drives the chains in the direction of the arrows shown in the drawing, the mandrel shaft being rotated and progressed forwardly along the rails. 1

Near the discharge end of the pickling tank the rails I2 are preferably inclined downwardly as at 20 so that as the sprockets ii of the mandrel become disengaged from the drive chains I6 the mandrel rolls down this incline and is deposited 0 in the hooks 2| of the transfer arms 22. These transfer arms are fixed in spaced relation upon a rocker shaft 23 arranged to be connected through suitable gearing indicated generally at 24 to a motor or other driving means 25.

The track portion 26 of each of the transfer arm hooks, which receives the ends of the mandrel shaft, and the toothed track portion 21 of each hook which engages the sprocket wheels I! of the mandrel, are both concaved as best shown in Fig. 3 so as to retard the movement of the mandrel as it rolls down the tracks of the books when the arms are moved over center and toward the-discharge position.

The toothed track 21 may be in the form of a section of sprocket chain, as indicated in Eigs. 3 and 4 located in a channel member 28 co ected at its ends to the hook 2| as by the bol 9 and having a spaced pair of flanges 30 formed upon or fixed thereto, between which is located the sprocket chain 21, the pins 3| of which may be located through the flanges 30.

In the operation of the apparatus the mandrel IS with the coil C suspended thereon when received in the hooks of the transfer arms is moved from the ends of the rails l2 and deposited in the curved guides 32 at the charging end of the first washing tank ll, riding down into the position shown in Fig. 2, where the mandrel shaft engages the railsa'S similar to the rails l2 above described and sprocket wheels of the mandrel shaft engage the drive chain 34 driven over sprocket wheels 35 in the direction of the arrow shown in Fig. 2 to convey the mandrels with the coils thereon through the first washing tank.

Although the transfer arms are shown only as located between the pickling tank and the first washing tank it should be understood that the same transfer arms are applicable for use he- 5 tween the first and second washing tanks or for removing the mandrels and coils suspended thereon from the second washing tank.

I claim: 1. Apparatus for handling a coil of metal in- 10 eluding a mandrel upon which the coil is supported, and substantially T-shaped transfers arms pivoted at their inner ends and each having a hook at its outer end provided with a stop at each side and a concaved track portion extending en- AGNES J. REEvEs GREER.

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