US1590429A - Stripper - Google Patents

Description

hine 29 Q1926] STRIPPER Filed March 10; 1925 3 Sheets-sheaf, 3

Patented June 29, 1926,

ED sures CHARLES s. nivrnn'r, rnonra iim i-nors.

s'TRIrrER.

Application fired March 10', ea. --sa-s1ao.=1i,'51s.

My invention relates to machines which are used in conjunction with tamping ma; chines in the formation of concrete blocks and similar products and in which the machine of my present invention is used to raise or force the product outot'fthe mold after it has been tamped or formed therein.

Oneobject of my invention is the provision of a stripper which is p'ower operated and "automatic in its action 'to the extent that when it is set in motion, it completes its stroke and then automatically disei'igages its driving mechanism and remains at rest until a subsequent operation.

Another object of my invention is the proper protection and lubrication of the mechanism. 1

Another object of my invention is the provision of a suitable clutch in combination with a yielding de'vice'for maintaining its engagementto complete a stroke.

Other objects of my invention will appear and be describ'ed'in the specification.

The novelty of my invention Willbe hereinafter more fully set forth and-specifically pointed out in the claims.

In the accompanying drawings z- Fig. v1 sheet 1 isa central sectional side elevation of a machine embodying my invention. I g I I Fig. 2 sheet 2 is "a sectional end view of F i'g. 1, the section being taken adjacent the right end of the'ma'chineand looking to the left.

3 sheet 3 is a'sectional plan view of Fig. 1, the section being taken about midway between the top and bottom of the machine. v The same numerals of reference are used to indicate identical parts'in all the figures.

As illustrating one 'form of machine embodying my present invention, though without limiting myself to the details construction or arrangement ofip arts shown in the drawings and description herein, while availing mysel f'oi all variations, modificat o stan -eq iv t' wh-" bh l yj' e lzw 'fhi the -S Io e of lthe appended claims, 1 1 7 have sh wn-am *ising abase 1, upon wln h a'nairof side Ynb'ersQ a secured, is be n a "b e mounted and. pomr'ris' ifge ha F somewhat inner-(sen 6f'afgfiE1EniTwheh carries "the cores '4, the side plates the of base land are se'euredth'ereon as clearly shown in Figs. 2 and 3, these bearings'being shown in section in Fig. '1. The shaft 10 carries a crank 12 ateac'h end thereof, these cranks beingdup'licates and arranged in line and suitably keyed in position to insure their uniform rotation with the shaft 10.

As shown more clearly in Fig. 1 shaft 10 is enlarged as at l3 and the clutch member 14 is feathered upon this's'haft and is normally held in ith'e positio'n "shown by 'a coil spring 15 which bears against a thrust col,- lar 16, the latter resting against a small shoulder near the centero f the shaft and at one end offth'e enlarged portion 13. The clutch member 14: carries a pin 17 which is adapted to engage any one of the openings 18 in the gear '9, A clutch shifter 19 is mounted on a shaft 20 and efiord means of engaging the pin 17 with one ofjthe holes 18 of the gear '9, the shaft '20 passing through the forward portion of the base and being provided witha treadle 21 which, when depressed rocks th'e fshaft 2O 'and 'eng'ages the clutch. Rollers '22 are provided on-then per end of the arms of the shifter 19 to reduce the friction between the parts. The clutch member 14 carries flange 23 which has two pockets 2i'for ined in to receive a rollerv 25 carried by an arm 26 .pivotally mounted as at to one vof the bearing members11,-the arm26 extending to the rear of the machine and embracinga 28 the latter being mounted bearingsf2 9 and 30, and being provided with a fixed collar 31 adjacent the bearing 30. Between the collar 31 a d v et ri 12 x e sie r nsfiQ is 'niel dtflie d' be ngln vide W ta i. n nanut3 hble ri lth-ea toward the left compressing the springifi and permitting the parts to rotate until's'uch ich bears st the time as the pin either become fully engaged with the gear or the next pocket 24 comes opposite the roller 25, whereupon the spring 32 would return the roller to the position of Fig. 3.

The spring 32 and its leverage as' applied to the roller is considerably stronger than the spring 15 and would overcome the latter on occasions when any interfering action between the two springs might be established.

The cranks 12 carry connecting rods and these connecting rods engage a shaft 35 which carries a pair of cross-heads 36, one at each side of the machine and guided by ways 37 formed in the side plates 2.

Each cross-head 36 carries a pair of rods 38 which extend upward through suitable bearings 39 in a roof-shaped cross member 40, the upper ends of the rods 38 engage-the stripping member ll which normally lies within channels formed by the grids of the member 3, the shape of the member l is such that it will freely pass up and oown within the mold as the shaft 10 rotates.

Some of the grid members which form the member 3 are provided with projecting ribs 42 which terminate at the upper surface at the member 3 and upon which the platen 4L3 rests, the platen being shaped to nearly fit the pocket portion of the mold and being preferably made of comparatively thin metal such as sheet metal or malleable casting.

The gear 9 carries an eccentric 4st (Fig. 1) and apump comprising a cylinder 42 and a piston 4-3' is mounted so that the piston is operated by the eccentric 44: when the gear rotates, the machine being made so that the base will hold a quantity of lubricating oil, the pump being provided with a suction element 4%, Fig. 2 and a discharge pipe 4-5 which leads, as shown in Fig. 1 to the side of the machine and upward and then to the center and is connected to a distril'iutor 46.

The distributor 46 comprises ahorizontal trough portion which terminates at each end in a pair of angularly arranged troughs which extend to and embrace the rods 38 a short distance below the bearing 39 and between these bearings and the terminations of the angularly arranged troughs. absorbent washers 47 are mounted which not only serve to distribute the lubricant on the rods but also to keep these rods in a clean condition. ateral branches 48 extend from the distributor 46 and terminate to distribute a portion of the oil onto the ways 37 of the cross-heads 36. Small holes 49 are drilled in the distributor to divert portion of the oil and drop it upon the shaft 35 from which the oil in turn drops upon clutch mechanism and roller and other parts, before described, as will be readily apparent. The operati n of the mac ne is for lows; 1

raw

Assuming that the parts are all assembled as shown in the drawings and the machine is in place and connected so that power may be applied to the shaft 7, and a platen is in place-within the mold. The mold is filled with concrete or other material from which the block or other product is to be made, and the material properly tamped and the upper surface of the block struck off, the operator presses the pedal 21 down causes the disengagement of the clutch and the consequent stopping of the shaft, the engagement of the roller 25 with the pocket 24: affording a sufficient lock to hold the parts of the machine against accidental movement.

After the block and platen have been removed a new platen is placed upon the stripping plate 42 and the pedal 21 again pushed downward. This again causes the engagement of the clutch and the shaft 10 makes another halfrevolution, lower the platen to the proper place for the formation of the next block and places the parts again in the position shown in the drawings. Meanwhile the gear 9 is continuously rotating and its eccentric is constantly operating; the pump to supply oil to the distributor 46 to lubricate all the parts of the machine which do not dip into the oil in thebase 1.

It might sometimes happen that in causing the engagement of the clutch, and espe cially after the edges of the holes become worn, the gear might start to rotate the clutch member before the pin 17 is fully engaged and to prevent injury to the. parts, the yielding mounting for the roller 25 is provided so that upon partial engagement of the pin 17 the clutch 14 can make its half revolution or if the lead is great enough to cause the pin to slip out of its partial engagement, the pin will be held tightly against the face of the gear until the next hole comes opposite it, whereupon the spring 32 will snap the pin into engagement to com plete the half revolution of the shaft.

As shown more clearly in Fig. 2, front and rear plates 50 are attached to the machine to complete the enclosure of the mechanism to excluded dust or concrete or other foreign matters from the interior of the machine and to keep the oil in proper condition.

wh it is de ired to change from one When the shaft 10 has made size or shape of block to another, the grid element 3 and the parts which it carries, are removed from the top of the machine and a new equipment having the proper mold arrangement is substituted. Such a change would be required in changing from concrete blocks to concrete bricks or from one style of block to another.

A machine built as herein shown and described is comparatively simple and easy to construct and assemble and is exceedingly efiicient in action, operates without jar or noise and Starts its stripping action at a slow rate of speed, accelerates toward the center of the stroke and slows down as it reaches the upper end of the stroke so that the block is raised from the machine without damage, or crushing it, or injuring it in any way and leaving the operators hands free for other duties during the time the ma chine operates.

Having thus fully described my invention I claim:

1. In a stripper the combination of a frame, a mold carried thereby, a stripping member movable within the mold, a crank shaft and connections for moving the stripping member, power operated driving mechanism for the crank shaft, and clutch connections between the power operated driving mechanism and the crank shaft whereby when the clutch is engaged the crankshaft will be rotated to impart one stroke to the stripping member and then the clutch will be disengaged.

2. In a stripper the combination of a frame, a mold carried thereby, a stripping member mounted for movement within the mold, a crank shaft, reciprocating crossheads moved by the crank shaft, rods be tween the cross-heads and the stripping memher, a driving member loosely mounted on the crank shaft, a clutch between the driving member and the crank shaft, means for engaging the clutch, and means for maintaining the clutch in engagement until the completion of a stroke of the stripping member.

3. In a stripper the combination of a frame, a mold carried thereby, a stripping member movable in the mold, a'power operated driving means for the machine, a clutch for connecting the power means to move the stripping member, and means for maintaining the clutch in engagement until the completion of a stroke of the stripping member.

4:. In a stripper the combination of a frame, a mold carried thereby, a stripping member movable in the mold, a power operated driving means for the machine, a clutch for connecting the power means to move the stripping member, and yielding means for maintaining the clutch in engagement until the completion of a stroke of the strip ping member.

5. In a stripper the combination of a frame, a mold carried thereby, astripping member movable in the mold, a power operated driving means for the machine, a clutch for connecting the power means to move the stripping member, and yielding means for maintaining the clutch in engagement until the completion of a stroke of the stripping member, said yielding means holding the parts in proper relation until the next engagement of the clutch.

6. In a stripper the combination of a frame, a mold carried thereby, a stripping member movable within the mould, power operated driving mechanism mounted in the frame and for moving the stripping member, a housing over the driving mechanism for excluding foreign matters and to retain lubricant, reciprocating rods moved by the driving mechanism and passing through the housing to move the stripping member, a crank shaft, connections between the crank shaft and the reciprocating rods, intermittently movable driving connections for the crank shaft, a means for maintaining the engagement of the driving connections until the completion of a stroke of the stripping member and then causing the disengagement of the driving connections.

CHARLES S. EMERT.

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