US1927004A - Lifting and dumping apparatus - Google Patents

Description

Sept. 12, 1933. F, FRAZER 1,927,004

` LIFTING AND DUMPING APPARATUS Filed Oct. 21. 1931 4 Sheets-Sheet l ATTORN Y Sept. 12, 1933. F FRAZER 1,927,004

LIFTING AND DUMPING APPARATUS Filed Oct. 21. 1931 4 Sheets-Shea?l 2 Q INVENTOR 1,. I Q BYzm//am/ i Q* ATTORNE S Sept. 12, 1933. F, FRAZER LIFTING AND DUMPING APPARATUS Filed Oct. 2l. 1931 4 Sheets-Sheet 5 INVENTOR ATTORNE s Sept. 12, 1933. F. FRAzER LIFTING AND DUMPING APPARATUS Filed Oct. 2l. 1931 4 Sheets-Sheet 4 Patented Sept. 12, 1933' f k1,927,004 LIFTING AND Dumme ArPARA'rs Fred Frazer, Syracuse, N. Y., assignor to Frazer- & Jones Co., Syracuse, N. Y., a corporation of New York This invention relates to a foundry apparatus, and has for its object a particularly simple and e'iicient conveyor by which the finished moldsare lifted and conveyed tothe pouring stationsand the molds with the finished castings therein conveyed to a delivery and break upv station where they are dumped to separate the' castings from the mold and bottom boards and to break up the mold, sift the sand, and return it to the molding station. Y d n It also has for its object, a particularly simple and eiiicient arrangement of the parts of the foundry apparatus for facilitating the entire molding cycle from mold making tothe breaking up of the mold.

The invention consists in the novel V features and in the combinations and constructions hereinafter set forth and claimed.` 4 i 4.In describing this inventionreference is had 20 to the accompanying drawings, inwhich like characters represent corresponding parts` in all YFigure 1 is a schematic View ofhthis foundry apparatus. y

Figure 2 is a side elevation of theconveyor. Figures 3 and 1 are enlarged fragmentaryside elevations of opposite ends of the carrier.

Figure 5 is a sectionalview taken on line 5 -5, Figure2.

Figure 6 is a `fragmentary plan viewof the end `of thesupport on which the articles oimoldiests f preparatory to being lifted by thelifters on the Figure 7 is an enlarged fragmentary plan view of the opposite endof said support. l

VFigure v8 is a sectional view on line 8-v-8, Figure 7.A A

lFigure 9 'is an end elevation of the support and contiguous parts of the carrier.: n 40 Figure 10 is an enlarged sectional View on line 10-10, Figure 2. y

Figure 11 is anenlarged sectional view on line 11-11,Figure,2.

Thisv foundry apparatus comprises a double molding station 1, pouring stations 2 and 3,-anda central delivery and mold breakingstation 4, preferably located in a straightrline midway 'between ,the pouring stations 2, 3, andthe doublemold making station at one side of the station4, and.

midway between the stations 2 and 3, so that the stations are inthe general form of an inverted letter T, with, the pouring stationsat the ends of the head of the T formation, and the mold making stations forming theleg of the T,

5 tracks connectingthe stations, the tracksinterseating at the delivery and break up station, a carriage Amovable along the tracks andfshiftable at the breaking up stationfrom the tracks leading to and from the mold making station, Vtor tracksileading to and from the. pouring stations,

andr vice versa. The mold making station l consists of avsand receptacle or pit 5, mold making machines 6 on the opposite sides thereof,` and also supports 7 for the finished molds, vthese being arranged yon opposite sides of4 the sand re- 65 captacle 5. Also, the molding machines 6 are lo-r cated on opposite sides of the receptacle 5. `The molding station, each pouring station, andthe delivery station are thus arranged in right angular formationV with the delivery ancllbreakup station 70 at-,the apex of the angulariormation. l

. The delivery and break up station 4 consists Vof a screen on which molds, with their castings therein, are thrown to break up themolds and separate the castings therefrom and also separate the bottom boards of` the'inold, andy metal bands around the mold. It wiil'ibe understood that a mold consists of a bottom board, a mold or box of ymolding sand, and one or more bands encircling the box. A Y

Suitable means is provided lfor conveying the sand passing .through the Yscreen of the station 4, back tothe sand receptaclel 5.Y

The castings are picked up oi the screen and thrown orptherwise conveyed to one `pile while the bottom'boards'andV bands are thrown or o therwise conveyed to the Ystation 1 to be used over again.

'8 Vdesignates overhead tracks etending be. tween thefpouringstations 2 and 3, or between 90 each pouring station2 or 3, and the central station 4, .these tracks'forming the head lofthe T formation. 9 are the .tracks leading from the mold making stati-on 1 to thev tracks 8. 10 designates a main carriage having trucks 11 movable 95 along the tracks Sand carrying a track section 12 below and'at a right angleto the tracksS and movablev into and ,out of..a1ignment with the tracks 9. il n Two main lcarriages 10l are shown, (oneffcr 100 eachV molding station), and the break up station 4 (or shake-out screen) isdouble', that is, it is wide enoughv to-'receive the molds from both pouring stations. j

13 is the body of a carriage having tlucks 151 105 movable along the track section 12 and the tracks 9. 15 isva lifter frame suspended from the body 13, aslby cables 15a, soas to be capable of laterally shifting or swinging movement. These cables are connected to suitable hoistingengine 16, supported by the carriage 13, and controlled in any suitable manner by means of a handle 16a.

The carriage 13 is also suspended from the trucks 14 by cables which facilitate the lateral swinging of the lifter frame 15.

17 designates lifter .members depending from the carrier 15, and secured thereto, asby brackets 18, the lifter members havingshelves or feet.19 at their lower ends arranged to extend under the articles to be lifted. The articles to be lifted are,

'Y in this embodiment of my invention, molds 20 `triage permitted by the fact that the carriagel 15 is suspended by flexible cables. The main carriage 10 is propelled along the tracks 8 in any suitable manner, and likewise, the carriage 13 is propelled along the tracks 12 and 9 in any suitable manner.

` The supports 7 are merely suitable tables or benches extending lengthwise of the station 1 on opposite sides of said receptacle 5, and are set inclined slightly out of parallelism with the vertical plane of the overhead truck 9.

' -In operation, the molder makes the mold on Ythe molding machine 6, taking the sand from the receptacle 5, the mold being built or placed upon 'a bottom board 21, the bottom boards are then `placed upon the support 7, the spacers or cross pieces 22 extending transversely of the support. The main carriage 10 is'moved valong the tracks 8 until the track section 12 is in line with the track section 9 and then the carriage 13 moved from the track section 12 on to the track section 9 in order to carry the lifter member 17 into vposition to pick up the molds on the support 7.

The support 7 and the frame 15 or some part Ycarried thereby are provided with means for swinging the frame 13 laterally relatively to the support in order to carry the shelves orY feet 19 into a position at one side ofthesupport 7, and as here shown, the advance end lifter member is provided with a roller movable along a track 26 on the support 7, the track having a deilected or nose portion 27 at one endl arranged'in the path of the lroller. The track 26 is also provided with a stop 28 at its rear end. Thus, when the carriage 13 is shifted so that its trucks 14 pass from the track section 12 to the track section9, 'the roller 25 engages the nose 27 and defiects or swings the carriage 13 andflifter frame 15 laterally, this being permitted by reason of the carriage 13 and frame 15 being flexibly supported by the cables. The lateral swinging of the lifter means to one side of the article supportis facili- -tated Vby the slight inclination of the support out of the vertical plane of the overhead'tracks 9.

Thus, the shelves are carried to one side of thel molds on the support y7 and the lifters 17 are swung out of a vertical plane. The carriage 15 is v then lifted until the shelves pass above the upper -edge of the track 26 so that -the carriage 13,`frame 14 and lifter member 17 now swing into a vertical plane carrying the shelves under the overhanging portions of the bottom boardsl so that now whentlie carriage 15 is hoisted farther, the molds are lifted thereby. The carriage 13 is thenshifted back along the track of track section 12, of the main carriage 10, and the main carriage 10 shifted to carry its load tov one end or the other of the pouring stations 2 or 3, where the bottom boards with the molds thereon are deposited in rows R on `the oor of said'pouring stations.

The `lifter frame 15 is then lowered slightly permitting the shelves or feet 19 to lower relatively to the overhanging portions of the bottom mitting the shelves to clear the molds.

As before stated, these molds are deposited in rows ,at the pouring stations, and after the castings have hardened in the molds, the carriage 10 is moved up to the first row at the pourboards, and then the carriage 10 backed off, pering station and lowered, so that the feet 19 are below the' level of the bottom boards, then the carriage moved farther inwardly to carry the feet under the bottom boards, and then the frame 14 hoisted to cause the row of molds with the castings therein to be lifted. The main carriage 10 is then moved along the tracks 8 to the delivery and break up station where the molds and bottom boards are dumped.

4The dumping mechanism will-now be described. Each of the shelves 19 is pivoted at 3 2 to the lower end of the companion lifter member 17 about midway between the sides of the shelf so that it is capable of tilting on its pivot relatively to` the lifter member 17 and it is normally held from tilting by means operable to tilt and dump the mold and bottom board. This means is here lower end tothe shelf'at one side of the pivot 32 and connected to operating means at its upper end, which operating means is carried by the lifter frame 15 on the brackets 18. The operating means consists of a rock shaft 35 extendlocked from turning by a pivoted latch 39 coacting witha square hub of the handle 38.

In operation, after the main carriage 10 has been shifted along the tracks 8 to delivery and break up ystation 4, the handle 38 is turned, thus tilting the shelves 19 about their pivots 32 and dumping orlthrowing and completely inverting the molds, bottom boards, and the castings in the molds on the screen where the moldsl break up, and the sand thereof siftsV down through the screen to the conveyor 4a and is carried to the molding station 5, where it is reused. The castings are picked up off the screen and deposited in one pile while the bottom boards and the mold bands are returned to the molding machine 6 where they are reused.

The support is provided with suitable locating strips 50 between which, the bottom boards with the molds thereon are placed by thev operator in order to accurately locate them,A so that the shelves can swing under them.V

The stripsV v50 are adjustable for bottom boards ofdiiferent widths. Also the lifter members 17 of the bracket 13 are adjustable lengthwise of the frame 15 to conform to the widths of the bottom boards. The latch 46, to be presently described, is also adjustable lengthwise of thesupport and its pivot to coact with the end shelfv in any adjustment of the strip 50 and lifters 17.

Means is provided for centering the'shelves l shown as a link 33 lextending lengthwise of each rlifter member 17 and pivoted at 34 and at its` 19 when they have been swung over the support or bench 7 by theswingingof the lifter frame 15, this means preventing overthrow of the shelves or feet 19 and also rebound thereof. The means for preventing overthrow comprises a shoulder 40 mounted on the end of the support or bench 7 remote from delivery station 4, and arranged to engage the bracket of the guide roller 25 when thev carrier 13 swings over the bench or support 7. Rebound is prevented by latch means located at opposite ends of the lifter frame, one of these being a latch 42'pivoted at 43 to a fixed point and coacting with a shoulder 44 on the lifter member 17 located at the end of the lifter frame 13 remote from the delivery station 4, this latch having a cam or inclined surface 45 with which the shoulder coacts while the lifter frame 15 and lifter members 17 are swinging over the bench 7. When the bracket of the guide roller 25 engages the shoulder 40, the shoulder 44 has cleared the cam surface `45 and then latch 42 drops over the shoulder, as seen in Figure 8. The end of the carriage `15 toward the station 4 is held from rebound by a spring pressed latch 46 pivoted to the bench '7, and having. a cam surface 47 coacting with a shoulder 48 provided from the shelf 19 at the end of the carriage 15 toward the center station 4. When the carriage 15 swings to carry the shelves 19 over the bench 7, the shoulder 48 engages the cam surface 47'of the latch 46 and presses it downwardly, and assoon as the shoulder 48 passes by the latch, the spring of the latch 46 reacts moving the latch in front of the shoulder 48, as shown in FigureS. Thus the lifter frame 15 and the lifter members 17 are held'from swinging movement. When the car riage 15 is hoisted, the shoulderr48 clears the latch or is lifted above the latch and also the latch 42 is lifted upwardly with the carriage or the adjacent lifter member 17. When the carriage 13 is moved along the track on to the tracks 9, the shoulder 44 passes out from under the latch.

What I claim is: n

1. In a conveyor, an overhead track, a carriage including a body movable along the track, and lifter means depending from the body and connected thereto to shift laterally relatively to the body and having depending members provided with shelves at their lower ends for hooking under articles to be lifted, a support for said articles located under the track, means for raising and lowerin'gthe lifter means, the support and the carriage having coacting means for shifting the lifter means laterally relatively to the articles on the support, and for releasing the lifter means from its laterally shifted position permitting the same to shift to carry their shelves under said articles.

2. In a conveyor, an overhead track, including a body, a carriage movable along the track, and lifter means depending from the body and connected thereto to swing laterally relatively to the body and having depending members provided with shelves attheir lower ends for hooking under the side edges of articles to be, lifted, a stationary support for said articles, the support and the carriage having coacting means for swinging the lifter means to one sidev of the sup- Y port during the movement of the carriage into a position over the support, means for holding the lifter means in its position assumed when swung to one side of the supportand means operable to lift the lifter means and. release the carriage from Vthe holding means whereby said members swing by gravity into position in which the shelves pass under the articles on the support, and means for lifting the carriage.

FRED FRAZER.

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