US1588998A - Head frame for mast hoists - Google Patents

Description

June l5 1926. 1,588,998 c. G. scHMlD HED FRAME FOR MAST HOISTS Filed Feb. 28 1925 5 ShelSheet l INVENTOR.

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A TTORNE YJ June' 15, 192s. 1,588,998 C. G. SCHMID HEAD FRAME FOR MAST HoIsTs Filed Feb. 28 1925 A TTORNEY` June l5, 1926. 1,588,998

c. G. scHMlD- v HEAD FRAME FOR MAST HOISTS Filed Feb. 28, 1925 5 Sheetsl-Sheet 5 INVENTOR.

J0 E @M gam@ www - ATTORNEY Patented June h15, 1926.

UNITED STATES PATENT OFFICE.

CARL Gf. SCHMID, OF INDIANAPOLIS, INDIANA, ASSIGNOR T0 INSLEY MANUFACTUR- ING COMPANY, F INDIANAPOLIS, INDIANA, A. CORPORATION OF INDIANA.

HEAD FRAME FOR MAST I-IISTS.

Application filed February 28, 1925. Serial No. 12,356.

My invention relates to improvements in material handling apparatus and has particular' reference to the type of apparatus for elevating such material as wet concrete and the like to a predetermined height and then delivering the same to conveyor chutes which convey the material to the point at which it is intended to be used. It is particularly applicable to the type of apparatus commonly known as mast hoist now commercially used in building operations.

One of the objects of my invention is to provide an improved means for receiving the material elevated on the mast in a bucket r from said bucket and delivering the same to the conveyor chute. More particularly my invention relates to improvements in means for bridging the space between the delivery mouth of the bucket and the receiving hopper onthe mast, which means shall be automatically operated to bridge the space when the bucket is in delivery position and to be moved out of the path of the bucket when the bucket is lowered.

For the purpose of disclosing my invention I have illustrated certain embodiments thereof in the accompanying drawings in which,

Fig. 1 is a side elevation of a mast hoist and its accompanying equipment embodying my invention;

Fig. 2 is a` detail in rear elevation of a part of the head frame embodying my invention;

Fig. 3 is a plan view of the head frame;

Fig. l is a detail showing the position of the parts prior to dumping;

Fig. 5 is a sectional View on the line 5-5 of Fig. 3 and substantially like Fig. l, showing the parts with the bridge pan in receiving position;

Fig. 6 is a view similar to Figs. 4t and 5 showing the parts in complete dumping position with the bridge pan in receiving position and the bucket gate opened;

Fig. 7 is a sectional View on the line 7-7 of Fig. 5, and

Fig. 8 is a detail section on the line 8-8 of Fig. 7.

In the -embodiment of the invention illustrated I provide a mast 1 on which the various parts are suitably supported and which preferably comprises lfour angle iron posts 2 suitably laced together by lacing and projects to the opposite side, or rear side of Y the mast, and in turn delivers the material to the hopper head 7 of a conveyor chute 8. This conveyor chute at its inner end is sup ported from and adjacent to the mast and is inclined outwardly and downwardly to deliver into a second conveyor chute 9 which Vin turn delivers to a third conveyor chute 10. The conveyor chute 8 has its outer end supported from the mast by means of a suitable guy cable 11 which preferably eX-V tends from a point near the top of the mast to the outer extremity of the chute and is also braced by a boom 12 which is connected to the outer end of the chute and is inclined downwardly and connected to the mast at its lower end. The chute 9 is pivotally hung from the chute 8 and is provided with a suitable counter-balancing frame 13 provided with a counter-balance weight 111.

The mast is also provided with a hoisting boom 15 which is preferably mounted on the mast at the 'same point that the bracing boom 12 joins the mast. This boom permits the handling of the various types of material used in building operations. Also, on the rear or inner face of the mast there Vis preferably provided a vertically movable `of terminology rather than the specific positioning of the parts.

Near the upper end and on the rear face of the mast there is mounted a supporting frame which comprises the vertical side members 17 connected by top and bottom cross members 18 and suitably braced by diagonal braces 19. This frame has inwardly projecting arms 2O and 21 which embrace the angle iron posts of the masts and are provided with guide lips 22, which not only serve as means for bolting the frame to the posts ot' the mast but also provide a guiding means for the frame when the same is moved vertically on the mast from one position to another. This frame is provided with a pair of laterally extending ears 23 to which is hinged a frame 24 provided with ears 25 through which and the ears 23 the supporting rod 26 is adapted to pass for swingingly locling the two frames together. Normally, the frame 24 is held against swinging movement by a brace 2"? extend ing between the top arm of the frame 24 and the top of a pair of arms 21. This frame 24 at its outer end carries the receiving hopper 5 and, due to the fact that the frame 24 extends diagonally along the side of the mast the receiving hopper is supported at the front face and to one side of the mast. This hopper, at its lower end, is provided with a hopper bottom 28 which delivers into the transversely extending chute 6, which chute at its delivery end is supported at the pivotal center of the frame 24 and at its receiving end projects beneath the hopper bottom 28 of the hopper 5.

The bucket 4 is of the hopper bottom type and is provided with a delivery mouth 29 adapted to deliver to the side of the mast and into the receiving hopper 5. This delivery mouth is preferably closed at its delivery end by a hinged gate 30 hingedly mounted on a cross rod 31 passing through the sides of the bucket through suitable supporting angles 32 ou the under face of the mouth 2Q. The side members of the gate project beyond the rod 31 and have extending between the same a cross rod 33 to which is attached a link rod 34 on which is mounted a. coiled spring 35 interposed between stop nuts 36 on vthe rod and a stop linger 37 on the under face of the bucket, whereby the bucket is urged under the influence of the coiled spring to its normal or closed position. A crank shaft 38 is mounted on the under face of the delivery mouth and a crank arm 39 of this shaft is connected by a link 40 with the cross rod 32. An opposite crank arm 4l which comprises a trip arm is mounted on this crank shaft 38 and is projected forwardly having mounted on its front a roller 42.

Due to the fact that the hoisting' bucket 4 reciprocates vertically past the relatively stationary hopper 5 there must be a clearance between the delivery mouth of the bucket and the side of the hopper. lVhen the gate 30 of the bucket is opened for discharging the contents thereof some means must be provided for bridging the space between the delivery mouth of the bucket and the hopper and to this end provide a bridge pan or chute 43. This bridge pan preferably takes a chute formation and' is pivotally mounted on the hopper 5, the sides of the hopper being cut away to form a mouth for the reception of the pan. The pan is mounted on a crank shaft 44 in turn journaled in suitable journals 45 secured in the mouth of the hopper 5. This crank shaft has at one end a crank arm 46 which is connected to a rod 47 surrounding which is a coiled spring 48 interposed between a stop 49 on the hopper and a stop nut 50 on the end of the rod whereby a constant tendency is exerted to rock the bridge pan into its vertical or non-operative position. The opposite end of the shaft 44 is provided with a crank arm 51 connected by a link 52 with a rocking lever 53 pivoted on a bracket 54 extending from the frame 24. This rocking lever 53 is provided with an inclined cam surface 55 and a substantially straight cam surface 56 and is prevented from rocking too far in one direction by a stop arm 57. The cam surfaces of the rocking lever are adapted to be engaged by the roller 42 on the crank arm 41 for the purpose of first rocking the shaft 44 to move the bridge pan 43 from a substantially vertical position to a substantially horizontal position and second rocking the sha-ft 38 to raise and open the gate 30.

Tn operation, with the bucket ascending` the parts are in their normal position ai; illustrated in Fig. 4, that is, the bridge pau is in its substantially vertical position and out of the path of the bucket mouth and the bucket gate is in its lowermost or closed position. lilith these parts thus positioned, as illustrated in Fig. 4, the rocking lever` 53 is inclined outwardly and the cam surface 55 is in the path of the roller 42 in the end of the crank arm 4l. As the bucket ascends to its dumping position the roller 42 engages the calm surface 55 on the rocking lever 53, thereby moving this lever toward the vertical and rocking the bridge pan into its delivery or substantially horizontal position as shown in Fig. 5. It will be understood of course, that during this movement the bucket is ascending so thaiL by the time the bridge pan has been moved vto its substantially horizontal position the mouth of the bucket will have passed the bottom of the bridge pan, thus permitting the bridge pan to move into its delivery position without interference. As the roller continues to ascend the rocking lever is brought to a stop by the stop arm 5i', thereby preventing further giving of the rocking lever and as the bucket continues to ascend the engagement of the roller` I2 with the cam surface 55, tilts the arm 4l downwardly rocking the shaft 38, which, through its crank arm connection with the gate 30, will tilt the front cnd of the gatey upwardly thereby opening the same as illustrated in F ig. 6. The gate is held in its opened position during the discharge et the bucket by the engagement or the roller on the cam face 56. This cam face it will be noted, is made suiiciently long to allow for a slight continued vertical movement ot the bucket after it has reached its discharge` position. It will be understood of course that suitable means are provided for stopping the bucket at its discharge position and preventing the same from over-running this position to too great an extent.

As the bucket descends the operation oi. the parts is reversed. That is, {irst the roller 42 rides ott the cam surface 56 and as it rides down the inclined surface 55 the crank arm Ll1 is permitted, under the inluencel of the coiled spring 35 and the Weight of the bucket gate, to assume a sub stantially horizontal position While the gate lowers to a closed position. Before the mouth of the bucket reaches the bottom oit the bridge pan 43 the roller will have sulficiently cleared the inclined 'face 55 of the rocking arm to permit the i'ocking arm to swing outwardly and the bridge pan inwardly and toward its vertical position under the influence ot the coiled spring 58, thereby permitting the bucket mouth to clear the bridge pan in its descending run.

I claim as my invention:

l. In an apparatus for handling building material7 the combination with a mast, of a chute hopper supported on said `mast, an elevator bucket vertically movable on said mast having a delivery opening and a gate for controlling said opening, a bridge pan normally out of the path of said bucket, means movable with said bucket and means relatively stationary cooperating` With one another as the bucket moves to dumping position to iirst move said bridge pan into ridging position and then open the bucket gate.

2. In an apparatus for handling building material, the combination with a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast having a delivery opening and a gate controlling the same,v a bridge pan normally out of the path ot' movement ot said bucket, means movable with said bucket and means relatively stationary co-operat ing with one another upon the reciprocal Vmovement of the bucket to project the. bridge pan into bridging position and open the bucket gate and to close the bucket gate and move the bridge pan out of the path of the bucket.

3. In an apparatus for handling building material, the combination with a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast having a delivery opening and a gate controlling the same, a bridge pan normally out of the path oi movement of said bucket, a trip member movable Ywith the bucket and a trip member relatively stationary engaged by said bucket trip member and moved thereby to operate the bridge pan and adapted to move said bucket trip member to operate said gate.

Li. In an apparatus for handling building material, the combination With a mast', of a .chute hopper supported on said mast, an elevator bucket vertically movable on said mast having a delivery opening` and a gate for controlling the same, a bridge pan nori mally out of the path of movement of said bucket, an operating member `for the bridge pan and an operating member for the bucket gate, each ot said members acting as a trip for the opposite member.

5. In an apparatus for handling building material, the combination with a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast and having a delivery opening and a gate for controlling said opening7 a. bridge pan, means for projecting and retracting the bridge pan and means for opening and closing the bucket gate, each of said means acting as a trip for the opposite means.

6. In an apparatus for handling building material, the combination with a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast and havinga delivery opening and a gate for controlling the same, a bridge pan, a rocking lever for said bridge pan and a rocking lever for said gate, said levers being so co-related that the bridge pan lever opcrates to rock the bucket lever and the bucket lever operates to rock the bridge pan lever.

7. In an apparatus for handling building material, the combination With a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast having a delivery opening and a gate for controlling the same, a bridge pan on said chute hopper normally in substantially vertical position out or' the path of movement of the bucket and means operated by the vertical movement of the bucket for rocking the upper free end of the bridge pan downwardly to move the pan to substantially horizontal and bridging position.

8. In an apparatus for handling building material, the combination with a mast, of a chute hopper supported on said mast, an elevator bucket vertically movable on said mast having a. delivery opening and a gate controlling the same, a bridge pan hingedly mounted on said chute hopper and means operated by the'vertical movement of the bucket for rocking the pan on its hinges to move the upper free end of the pan downwardly into bridging position and upwardly out of bridging position.

9. In an apparatus for handling building material, the combination with mast, o a chute hopper supported on said maat, an elevator bucket vertically movable on said mast having a delivery opening and a gate for controlling the same, a bridge pan hingedly mounted on said hopper and means operated by the vertical movement ol the bucket for alternately rocking the bridge pan on its hinges to move the i'ree upper end downwardly to bring' the pan into subn stantially horizontal position and upwardly to move the pan into vertical and non-bridging position.

l0. In an apparatus for handling building material, the combination with a. mast, oit' a chute hopper supported on said mast,

an elevator bucket vertically movable on said mast having a delivery opening and a gate controlling the same, a. bridge pan, a crank shaft on said bucket connected With said gate for operating the same, an operating arm for the crank shaft, a crank shaft 'for operating the bridge pan, an operating lever for the crank shait, said operating lever being adapted to be engaged by the operating arm (fluring a part of the movement of the bucket and to move the operating arm during a continuation of said bucket movement, the inter-engagement of said lever and arm being such as to hold the parts in the position to which they have been moved While the bucket is in dumping position.

In Witness whereof, I CARL G. SCHMm, have hereunto set my hand at Indianapolis, indiana, one thousand nine hundred and tiventyiivc.

CARL Gr. SCHMID.

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