Title:
Electroplating machine
United States Patent 2214262


Abstract:
My Invention relates to electroprocessing machines and in particular to a full automatic machine and a method of operation thereof. It is the object of my invention to provide a A machine characterized by the fact that it employs a plurality of side arms for supporting work racks over a plurality...



Inventors:
Winkle, Todd Van
Application Number:
US14731537A
Publication Date:
09/10/1940
Filing Date:
06/09/1937
Assignee:
HANSON VAN WINKLE MUNNING COMP
Primary Class:
Other Classes:
204/203
International Classes:
B65G49/04
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Description:

My Invention relates to electroprocessing machines and in particular to a full automatic machine and a method of operation thereof.

It is the object of my invention to provide a A machine characterized by the fact that it employs a plurality of side arms for supporting work racks over a plurality of successive tanks, with the result that there is the minimum of height of the machine. In such a machine it is my object to 1, actuate said arms longitudinally of the machine by a chain and to employ said chain also for the purpose of elevating and lowering said arms in order to bring about a quick transfer of the work pieces from one tank to another.

g It is my object to provide such a machine in which there are a plurality of raising and lowering mechanisms arranged to elevate one arm while lowering another adjacent arm so that the weight of said arms will be counterbalanced; and *g to employ the moving chain for moving the arms for the purpose of synchronously actuating the raising and lowering mechanism.

It is my object to provide such a machine so that the aims of the work pieces may or may not * be electrified; and if electrified, they may be electrified in their lowered positions only or in their upper elevated positions only, or in both positions.

It is an object to provide, in such a machine gg means of maintaining the arms in elevated position as they are transported from a position over one tank to a position over the next adjacent tank when the arms are in elevated position so that the work pieces and carriers will clear the ad*3 Jacent ends of adjacent tanks.

It is a further object to provide a machine of this character in which the entire operating mechanism is carried upon a set of central standards arranged to one side of and preferably above 4 the level of the tanks so as to be in a position where the grease and oils on the mechanism for lifting, lowering and moving the arms cannot contaminate the contents of the tank; so that the mechanism will be on the side opposite to that on which the operator stands; and so that the operating mechanism is fully observable and accessible while at the same time having the minimum over-all height. It will be understood, however, that I preferably prefer to arrange the standards and operating mechanism to one side of but between a continuous series of encircling tanks.

It is a further object to have a mechanism in which the minimum width of tank is necessary.

S The particular feature of my invention is the method of transporting, raising, lowering and maintaining in elevated position the several arms.

A single driving chain is employed which transports the arm bodily laterally and which also actuates the elevating and lowering mechanism. g It is my object to so locate this mechanism that it is within the boundary of the general framework supporting the actuating mechanism.

Referring to the drawings: Figure 1 is a top plan view of a machine of my invention.

Figure 2 is a side elevation with the tanks partially in section and partially broken away showing one end of the machine in detail.

Figure 3 is a section on the line 3-3 of Figure 16 1 looking in the direction of the arrows, showing one arm of the mechanism in an upper position and the other in a lower position.

Figure 4 is a detailed view on the same section as Figure 3 showing the arrangement of the arms and the elevating mechanism and lowering mechanism in detail.

Figure 5 is a section on the line 5-5 of Figure 2 looking downwardly showing the elevation blocks at the base of the arms in section. In this view the right-hand elevating mechanism is about to start the elevation of an arm and the left-hand mechanism is about to undertake the lowering of an arm.

Figure 6 is a similar view showing the comple- 80 tion of the elevating of the right-hand arm and the lowering of the left-hand arm.

Figure 7 is a section through one of the elevating and lowering pins and its universal mounting. It is a section on the line 7-1 of Figure 6.

Figure 8 is a section on the line 8-8 of Figure 4 showing in elevation the back of the socket on the back of one of the arms, into which socket the nose of the elevating and lowering pin engages.

Figure 9 is a detailed elevation showing the method of adjusting the idler sprocket support at one end of the machine, which sprocket supports the main chain.

Figure 10 is a section on the line 10-10 of Figure 6.

Figure 11 is a section on the line II-II of Figure 4 showing the means of attachment of the main chain to the travelling bracket on which the arms are pivoted.

Figure 12 is a section on the line 12-12 of Figure 9.

Referring to the drawings in detail, 1, 2 and 3 designate a series of tanks having various 9p cleaning and electroprocessng fluids therein.

These tanks have adjacent end walls 4 over which the racks 5 which support work pieces not shown must be lifted in proceeding from one tank to another. -It is desirable to effect the raising and lowering operation synchronously with the longitudinal movement of the racks and work pieces that are elsewhere supported in the solutlon and to effect this raising and lowering op10 eration with the maximum speed in order to reduce oxidation of the work pieces. To that end (Figures 3 and 4) the racks are suspended upon a plurality of spaced arms 6 through supports 1 that are pivoted at 8 upon the ends of the arms 15 6. In order to preserve the racks in their vertical position during this lifting operation, the upper end 9 of the support 7 is pivoted at to a guide arm II. The lifting arm 6 and guide arm' II are respectively pivoted at 12 and 13 to 20 a transporting bracket 14 which carries a diagonally disposed trolley wheel 16 that rides upon a rod 16 which constitutes a track. This rod, wheel and bracket take the load which- is imposed upon the arms. The rod-shaped track 25 16 is supported upon spaced supporting plates IT that are in turn mounted upon the angle iron bracket 18 constituting a part of the framework of the central support for the arms and the operating mechanism therefor. These angle 80 iron members 18 are bolted by bolts 19 to the caps 20 and the supporting members 21 which are in turn supported on the cross members 22 that are carried upon the standards 23 that rest upon the floor 24. These standards and all M5 of the mechanism supported thereby, with the exception of the ends of the arms 8 and II, are located to one side of the tanks 1, 2 and 3 and preferably within the space 25 between the tanks. The cap members 20 and base members 42 26 carry between them the rods or shafts 27, which in turn support the reciprocating elevating and lowering mechanism for the arms 6 as hereinafter described. These cap members are bolted by the bolts IS and 19a to the angle mem45 bers 18 and 18a to form a rigid framework centrally of the standards 23.

Returning to the brackets 14 (Figure 4) the lower end of the bracket Is provided with a pair of horizontally-disposed surfaces 28 to which 50 are bolted by the bolts 29 the fingers 30 which are formed on the links 31 forming a part of the articulated chain 32. In this manner the ends of the brackets 14 are connected to the main actuating chain 32. As the arms 6 and II are S pivoted on the bracket 14, this means that the chain 32 also transports these arms and whatever they carry.

This chain 32 is provided with a plurality of spaced rollers 33 on vertically-disposed axles 14. 60 These rollers travel between guide flanges 36 and 36 carried on the underside of the plates 18, this arrangement serves to position and align the lower end of the arm supporting bracket 14.

The side arms 6 are provided with contact W shoes 36a which engage the contact rails 37 on the insulated support 31 carried on the angular side rails 39 forming a part of the central framework and supported upon the upper ends of the standards 23.

70 These rails 89 also support the spaced brackets 40 having the inclined tracks 41 arranged adjacent the abutting ends of.the tanks so as to support the lower ends of the arm 6 by engaging with the rollers 42 pivotally mounted on the axle 7T 43 on the lower ends of the arms 6.

Raising and lowering Smechwaninm for the side arms The rear lower ends and the rear face adjacent thereto of each side arm are provided with a semi-circular depression or socket 43a and a slotted entranceway 44 cut away from the rear face of the lower rear end of the arm 6. This . socket 43 is intermittently engaged fof elevating and lowering purposes by the rounded nose 45 of the elevating and lowering pin 46. The nose is threaded at 41 (Figure 7) into the outer end of the sleeve member constituting this pin. .The inner end of this sleeve is mounted upon the extension 48 and against the shoulder 49 of a support comprising an annular tapered surface 50 engaging with the cooperating surface Il in a retaining plate 62 which is mounted on the forward face of the supporting block 63. The rear face of the member 60 is rounded as at 54.

It is provided with a chamber 85 Into which S0 projects an aligning pin 56 having its sharp end engaging with a socket T5 and its rear rounded end 68 engaging with a thrust member g5 which is forced outwardly by the spring 80. This thrust member and spring are contained with a cylindri- S cal cutaway portion 81 within the block 53. The purpose of this mechanism is to provide an articulated pin which can rock in the block 53 as the block with its pin is moved into and out of engagement with the lifting arm I for raising and lowering that arm.

It will be understood that this arm when in its lowermost position (Figure 4) has the head of its adjusting screw 62 in engagement with the face 63 of the shoulder 64 which is a part of the bracket 14. The adjustment of the screw 62 regulates the horizontal position of the arm 6.

Returning again to the supporting block 53, it will be noted that this is mounted upon one end of a rocker arm 66 (Figures 15 and 6). Similar pins and blocks are mounted 'on opposite ends of this rocker arm. The rocker arm in turn is mounted upon one of the vertical shafts 21.

Each of these shafts is mounted within roller bearings 81 at the top and bottom within the bearing sleeves 20 and 26 (Figure 4). The bottom of the shaft 27 Is mounted upon ball thrust bearings$l1. It has already been explained that these sleeves 20 and 26 are bolted by the bolts 19 and S1a to the angle Iron members 1I and 18a M respectively.

The rocker arm (Pigures 5 and 6) is provided with a rocker actuator consisting of the finger 68 which is provided with a Jaw 69 at one end for engaging with an internally extending lug 17 5 mounted on the chain 32. When this lug 16 engages on the Jaw 18 (Figure 5), it causes the rocker arm to rock from a retracted position to an extended position on the right-hand side for elevating one of the arms and lowering the next adjacent left-hand arm. In this manner the weight of the arm which is being lifted is counterbalanced by the weight of the arm which is being lowered on the other end of the rocker arm. By * this arrangement the excessive strain on the con. veying mechanism is eliminated, this strain having been a serious defect hitherto in such machines because of the great multiplication required between the small movement of the con- .1 veying mechanism and the relatively large vertical movements .required to be produced thereby.

In order to restore the rocker arm to its initial position (Figure 6), this same lug i0 after it leaves the Jaw 68 engages with the return finger i 71 which is pivoted on the vertical shaft 12. This causes the inner end 73 of this return finger to actuate the pitman 74 which is pivoted to it and to the rocker actuator 68, thus returning the rocker arm from the position shown in Figure 6 to the position shown in Figure 5. Due to the wear upon the jaw 69 and the end of the finger 71, this jaw and this end are bolted by the bolts 69a and 1 a on the ends thereof so that they are replaceable and renewable.

This assembly therefore consists of a rocker arm, pivoted raising and lowering pins at either end thereof having a limited rocking movement, and lug means actuated by the chain for rocking the rocker arms first in one direction and then in the other. It will be noted that both the horizontal movement of the arm 6 and the vertical raising and lowering movement of the arm 6 are brought about by actuating the common chain 32.

The drive This chain 32 is mounted upon an idler sprocket 75 at one end and a driving sprocket 16 at the other end.

The idler sprocket is carried in a bearing block 717 that is slidably mounted on the supporting framework. It is adjustably positioned with the set screw 78. The details of this form no part of the invention.

The driving end consisting of a driving sprocket 16 also includes the driving shaft 79 which is driven through the gear box 80, the shaft 81, bevel gear 02, pinion 83, vertical shaft 84, the gear box 85 and the armature shaft 86 of the 36 motor 87. The upper frame member 88 supports the motor 87 and gear box 85 and the lower framewnrk 89 supports the lower gear box 80.

Method of operation It will therefore be apparent that as the chain 32 is driven within its supporting track, it carries a plurality of spaced arms around in a continuous circuit over and over the tanks. It also actuates the rocker arms and lifting and lowering pins to successively elevate each arm before it comes in the neighborhood of the end of the tank so as to place that arm and its roller on the track 41. The chain thereafter continues to move the arm with its roller 42 on the track 41. When the roller 42 comes near the end of the track 41, the next adjacent pin 46 inserts the nose 45 into the socket 43a at the back of the lower end of the arm 6 and thereby lowers the arm without stopping its horizontal travel. In this way the arms are continually moving horizontally and are intermittently moved vertically. All movements are derived from a common chain by a single motor. This materially reduces the cost of driving the mechanisms by eliminating independent motors and the necessity for synchronizing independent motors. It ensures synchronization of the various parts of the mechanism.

As heretofore pointed out, such an arm ar(5 rangement provides for the minimum of height of the machine so that it can be placed in bays in buildings having low ceilings. The work is readily accessible from the outside of the tanks.

The contents of the tanks cannot be contaminated by any drippings of grease or oil from the operating mechanism.

It will be understood that I desire to comprehend within my invention such modifications as may be clearly embraced within the claims and 70 scope of my invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is: 1. In an elevating conveyor, means to transport work arms over a plurality of tanks, an arm elevating and lowering means actuated by said transport means for raising and lowering said arms at intervals, said arm elevating means engaging said arms in substantially horizontal thrust-counteracting relationship for applying the thrust of an arm being lowered in opposition to the thrust of an arm being raised so that the forces substantially counterbalance each other.

2. In an elevating conveyor, means to transport work arms over a plurality of tanks, an arm elevating and lowering means actuated by said transport means for raising and lowering said arms at intervals, said arm elevating means engaging said arms in substantially horizontal thrust-coimteracting relationship for applying the thrust of an arm being lowered in opposition to the thrust of an arm being raised so that the forces substantially counterbalance each other, and means for maintaining an arm when raised in its raised position while being moved horizontally therealong during the actuation of the raising and lowering means.

3, Inan elevating conveyor, a horizontally moving chain, means for supporting said chain and for supporting a plurality of work conveying arms moving with said chain, said plurality of arms being pivotally connected to said chain and adapted to move vertically while the chain continues its movement, and arm elevating and lowering means actuated by the chain for intermittently raising and lowering said arms, said arm elevating means engaging said arms in a substantially horizontal thrust-counteracting relationship for applying the thrust of an arm being lowered in opposition to the thrust of an arm being raised so that the forces substantially counterbalance each other.

4. In an elevating conveyor, a horizontally moving chain, means for supporting said chain and for supporting a plurality of arms moving with said chain horizontally, a plurality of arms pivoted on said chain adapted to move vertically while the chain continues its movement, armelevating and lowering means actuated by the chain for intermittently raising and lowering said arms, said arm-elevating means engaging said arms in thrust-counteracting relationship for applying the thrust of an arm being lowered in opposition to the thrust of an arm being raised, and roller and track means for maintaining said arms in their elevated positions between the raising and lowering movement thereof.

5 In an elevating conveyor, the combination of a driven chain, a track associated therewith, a plurality of arm supports supported on said track and connected to said chain for movement therewith, pivoted arm means on each of said supports, a plurality of spaced raising and lowering means for said arms actuated by said chain comprising pivoted rocker arms, articulately 05 mounted lifting and lowering pins disposed on either end thereof, means on said chain for engaging with said rocker arm to rock it to move first one pin into engagement with one of said arms to elevate it, and means associated with said rocker arm engageable by said chain for rocking the arm to cause the other pin to simultaneously engage said arm to lower it.

6. In an elevating conveyor, the combination of a driven chain, a track associated therewith, & pluratity of arm upports supported on said track and oonnected to said chain for movement therewith, pivoted arm means on each of said ispports, a plurality of spaced raising and lowerI ing means for said arms actuated by said chain comprising pivoted rocker arms, articulately mounted lifting and lowering pins disposed on either end thereof, means on said chain for engaging with said rocker arm to rock it to move first one pin into engagement with one of said arms to elevate it, and means associated with said rocker arm engageable by said chain for rocking the arm to cause the other pin to engage said arm to lower it, said pins and arms being so arranged that while one pin is engaging an arm to elevate it, the other pin is engaging another arm to lower it, said arms being associated in pairs.

7. In an elevating conveyor, the combination of a driven chain, a track associated therewith, a - plurality of arm supports supported on said track and connected to said chain for movement therewith, pivoted arm means on each of said supports, a plurality of spaced raising and lowering means for said arms actuated by said chain, comprising u pivoted rocker arms, articulately mounted lifting and lowering pins disposed on either end thereof, means on said chain for engaging with said rocker arm to rock it to move first one pin into engagement with one of said arms to elevate it, means 0 associated with said rocker arm engageable by said chain for rocking the arm.to cause the other pin to engage said arm to lower it, said pins and arms being so arranged that while one pin is engaging an arm to elevate it, the other pin is engaging another arm to lower it, and means comprising a track adapted to engage with a portion of said arm in its elevated position between its pin-engaging positions for maintaining the arm in its elevated position.

8. In an elevating conveyor, means for moving a plurality of arm supports therealong, a track for said arm supports, arms pivotally mounted on said arm supports, a plurality of spaced lifting and lowering means pivotally attached to a rocker member, and adapted to engage with said arms to move them on their pivotal supports, said lifting and lowering means comprising a pair of pins pivotally mounted on opposite ends of said *rocker member, means associated with said rocker member and said arm support moving means for rocking said rocker member, and a ball and socket means formed on the end of each of said pivotally mounted and lowering means and the back of each of said lifting arms to perM mit of universal engagement and relative movement therebetween.

9. In an elevating conveyor, means for moving . a plurality of arm supports therealong, a track for said arm supports, arms pivotally mounted on said arm supports, a plurality of spaced lifting and lowering means pivotally attached to a rocker member and adapted to engage with said arms to move them on their pivotal supports, said 65 lifting and lowering means comprising a pair of pins pivotally mounted on opposite ends of said rocker member, means associated with said rocker member and said moving means for rocking said rocker member, a ball and socket means formed on the end of each of said pivotally mounted and lowering means and the back of each of said lifting arms to permit of universal engagement and relative movement therebetween, supplementary stationary track means adapted to engage with .6 said pivotally mounted arms in their elevated position, and rollers on each of said arms for engaging with said track means.

10. Xn an elevating conveyor, an actuating chain, inwardly directed lugs thereon at intervals, a rocking arm having a jaw engageable by said * lugs, actuating mechanism connected to said rocker arm and engageable by said lugs for further rocking said arm, and a pair of lifting and lowering means universally mounted on opposite ends of said rocker arm. 11. _Ln an elevating conveyor, an actuating chain, inwardly directed lugs thereon at intervals, a rocking arm having a jaw engageable by said lugs, actuating mechanism connected to said * rocker arm and engageable by said lugs for fur- u ther rocking said arf, a pair of lifting and lowering arms carried by said rocker arm member having sockets on the back thereof, and,corresponding, engaging spherical portions for positioning in said sockets on the ends of said lifting g and lowering arms.

12. In an elevating conveyor, a frame, a track on said frame, a plurality of arm carriers supported at their tops on said track, a chain guided in said frame adjacent the lower ends of said g carriers, a chain therein having rollers engaging with said guide, means of connecting the lower ends of said carriers to said chain to be guided thereby and moved therewith, arm means pivotally mounted on said carriers, a roller on said arm means and a socket in the back of said arm means, a plurality of spaced vertical shafts in said frame within the orbit of said chain, rocking means on each of said shafts for supporting spaced raising and lowering pins adapted to engage in the sockets in said arms, and track means arranged at intervals on said frame for supporting said arms by said rollers in their elevated position.

13..In an elevating conveyor, a frame, a track on said frame, a plurality of arm carriers supported at their tops on said track, a chain guided in said frame adjacent the lower ends of said carriers, a chain therein having rollers engaging with said guide, means of connecting the lower ends of said carriers to said chain to be guided thereby and moved therewith, arm means pivotally mounted on said carriers, a roller on dald arm means and a socket in the back of said arm means, a plurality of spaced vertical shafts in s0 said frame within the orbit of said chain, rocking means on each of said shafts for supporting spaced raising and lowering pins adapted to engage in the sockets in said arms, track means arranged at intervals on said frame for supporting said arms by said rollers in their elevated position, said arm means comprising a pair of spaced *pivotally mounted arms on each support, and means for interconnecting the outer ends of said arms for supporting and maintaining a work carrier constantly in a vertical position irrespective of the position of the arms.

14. In an elevating conveyor, a frame, a track on said frame, a plurality of arm carriers supported at their tops on said track, a chain guided in said frame adjacent the lower ends of said carriers, a chain therein having rollers engaging with said guide, means of connecting the lower ends of said carriers to said chain to be guided thereby and moved therewith, arm means pivotally mounted on said carriers, a roller on said arm means and a socket in the back of said arm means, a plurality of spaced vertical sharts in baid frame within the orbit of said chain, rocking means on each of said shafts for supporting * spaced raising and lowering pins adapted to engage in the sockets in said arms, track means arranged at intervals on said frame for supporting said arms by said rollers in their elevated position, said arm means comprising a pair of apaced pivotally mounted arms on each support, means for interconnecting the outer ends of said arms for supporting and maintaining a work carrer constantly in a vertical position irrespectlve or the position of the arms, and yielding means associated with the mounting of each of said elevating and lowering pins for yieldingly returning it to its normal position after each raising and lowering operation.

15. In an elevating conveyor, a horizontally moving chain, a plurality of arms pivotally associated therewith in spaced relationship, and arm-elevating and lowering means comprising a rocking member actuated by said chain at in- g tervals adapted to move transversely of said chain for engaging said arms to raise and lower the arms while the arms are moving transversely with the chain, said arm-elevating means being arranged substantially in thrust-balancing relacionship for applying the thrust of an arm being lowered in opposition to the thrust of an arm being raised.

VAN WINELE TODD.