US1708839A - Mechanical vibrating ramming device - Google Patents

Description

April 1929- c. E. a. L.JARRETT KNOTT' 1,708,339

MECHANICAL VIBRATING RAMMING DEVICE Filed Aug. 27, 1927 3 Sheets-Sheet 1 April 1929. c. E. G. L.JARRETT-KNOTT 9 MECHANICAL VIBRAI'ING RAMMING DEVICE Filed Aug. 27, 1927 3 Sheets-Sheet 2 April 9, 1929- c. E. G. L. JARlETT-KNOTT 39 MECHANICAL VIBRATING RAMMING DEVICE Filed Aug. 27, 1927 s Sheets-Sheet 5 Fig.5

T- T u T I 30 Fig. 6 i

I77 we 17 f; r,- C 5.611. Jar/w 271% it,

Patented Apr. 9, 1929.

UNITE!) fiTiTA'EEd PATENT OFFICE.

IVlEClL/rlldilCAL VIBRATING DEVICE.

Application filed August 27, 1327, Serial The present invention has for its subject an improved apparatus for the production of moulded a: lcs of all vpes and more particularly for the maini'acture of iiuouldcd articles of concrete which may be reinforced or not.

lit is well known that in the latter case it is essential in order to obtain saisfactmiy products to eiiect careful ramming and if desired, supplementary coinpres ion, so as to obtain a mass as compact as possible.

"On this compactness, with complete absence of empty spaces in the mass and a good covering of the reinforcements and of any other elements which may be incorporated in the article which is manufactured, depends to a large extent the strength of the article produced.

In order to obviate the disadvantages of ramming and compression by hand, which necessitate a considerable expense in manual labour and never produces an efficient result,

astheir execution depends more or less on the skill of the workmen employed for the manufacture, various presses, ogging tables,

vibrating tables, and so forth have been suggested for the purpose of effecting, mechamearly and automatically, the ran'uning and compression in question.

The various existing devices, however, are for the most part adapted for the production of special articles and are not of general application. Usually the mould which is used forms a part of the apparatus itself.

7 This however is not the case with the apparatus which forms the subject of the present invention.

The apparatus according to the invention is constructed in such a. manner to be capable of subjecting any suitable 'mould, which is simply placed on the frame forming the upper part of the apparatus, to vertical movements (rising and falling) which are rapid and repeating and, of an adpistable amplitude, so as to sheet automatically an eiiic ient settling of the material or mixture ofimaterials which have been placed into the mould.

By reason of the fact that the mould and the apparatus are independentof one another, the apparatus, Wll'iCll constitutes a new industrial product and which is of ceneral application may, without any modificat-1011 be used "for the manuiacture of the interior of the said r-ieatin No. 215,868, and in France June 5, 1927.

most varied moulded articles such as reinforced concrete, railway sleepers, brackets, blocks, stones traversing the whole thickness of a wall and so forth.

The apparatus forming the subject oi: the

present invention characterized by the following features.

1. By its general form of construction and operation and particularly by the combination of a stationary framework, with which are associated the 1oggmg dev1ces, with an themselves having thefollowing character istic features.

Each of these devices is provided with a casing forming a cambox and in the interior of which rotates a cam of suitable shape keyed to a shaft capable of being rotated in any suitable manner.

In the upper face of the casing in question there is provided a seating communicating with the interior of the box by means of a cylindrical passage through which passes the tail of a press plunger of which, at the moment of the escape produced by the recoil of the cam, the head, in descending into the enables the upper carriage which it has previously 'aised to strike in falling against the lateral portion of the upper face of the casing.

Finally between the lower end of the tail of the press plunger andthe outer surface of the cam is disposed the free end of a' lever, acting as a relay, capable of rocking about a shaft secured to the saidcasin r.

lily reason of connection bychains and toothed pinions suitably mounted, the various jogging devices (devices which according to their number, that is to say according to the size of the apparatus, are placed in two or more rows) are all actuated from a single source of power, the various jogging devices which-areaplaced in the same row may b actuated either by means of a continuous transmission shaft or by means of a sectional transmission shaft, of which the separate sections are connectedtogether in any suitable manner, by means of coupling sleeves, flexible shafts or any other suitable device. Y

According to the nature of the articles to be treated it is possible, by increasing or reducing the speed of rotation of the shafts for actuating the cams, to vary in any suitable manner the number, per unit of time, of the shocks to which the carriage of the apparatus and the mould placed on its carriage are subjected. By providing on the upper faces of the cam boxes, wedges or blocks, formed if desired by simple plates of metal or of any other suitable substance, it is possible, if desired, toreduce the amount of the jerks and consequently vary the forces of inertia brought into play by each of them.

Finally for each particular case it is possible to vary the time during which the article which is being treated rests on the I apparatus.

. There are therefore )rovlded three elements of adaptation of the apparatus: fall and height of jerks, and time during which the article rests on the apparatus or, what comes to the same thing, number of erks to which an article is subjected for a given fall. 1

Itjwill thus be readily seen that the apparatus in question permits of effecting with great rapidity and under absolutely elficient conditions, the settling which it is desired to obtain and it will be seen that conseout the largest number of operations.

In the accompanying drawings there is.

illustrated by way of example one form of construction of the invention.

Figure 1 shows in elevation adiagrznnmatic view of, the apparatus.

Figure 2 shows a plan 'ofthe framework, the carriage being removed so as to enable the ogging devices and the operating mechanism for these devices to be seen.

Figure 3shows to a larger scale a section 011 the line IIL-III of Figure 1.

Figure 4 shows to a larger scale a detail of the operating mechanism for the guides of the carriage andv of the mould.

Figure 5 shows to a larger scale a section of the jogging devices, the section being taken on. the line V'-V of Figure 2, and

Figurefi shows to the same scale as Figure 5 a section of the same device on the line VI-VI of Figure 2.

Asseen in Figures 1, 2 and 3 the apparatus consists of a stationary framework 1 forming a base and on which are mounted the four jogging devices 2, 3, 4 and 5 used in the case to be described.

On the jogging devices rests a carriage 6 formed by an assemblage of angle irons 7 be moulded which may accidentally fall from the mould, from falling on the operating mechanism of the lifting (ltWlvCS and which would obstruct and eventually stop the operation of this mechanism.

The protecting sheet 8 is folded on the four sides in the form of a gutter in such a manner as to enable the materials which fall thereon to be sul'isequently recovered.

Above the protecting sheet 8 are provided rails (two in the present case) 9 and .10 which may for example be formed by rail elements of suitable dimensions.

The mould M placed on these rails and into the interior thereof is placed the material or the mixture of the materials which are adapted to be subjetted to settling.

For convenience, the molds before being placed upon the jogging device may be held by a support 50 having rails 51 which come adjacent the rails 9 and 10.

During the vertical upward, and downward movements the carriage 6 is prevented from shifting sidewise by a certain number of pins 11 mo able in the interior of guides 12, and of which the free ends 13 pass through openings 14 provided in the protecting sheet 8. The upper end of these pins also serves to hold the mould M from shift.- ing on the carriage.

In order to enable the mould to be placed in position by sliding it on the rails 9 and 10 it is possible, by means of operating levers 15, 15 acting through the medium of transmission rods or bars 16, 113' on operating plates 17, 17', to lower the pins 11, so that they are below the level of the rails. By a reverse operation of the same mechanism it is possible, OlltO the mould has been placed on the carriage, to again raise the pins.

As stated above the raising of the carriage and the mould, is effected by a certain number of jogging devices constructed as illustrated in Figures 5 and 6.

As shown in these figures each device consists of a casing 18 of which the base is arranged in such a manner as to be capable of being secured to the framework 1 and in the lateral walls 19 and 20 of which are provided circular openings 2.1v and 22 provided with suitable linings and acting as bearings for a transversev shaft 23 on which is keyed a cam 21 of suitable shape.

In the upper wall of the casing is provided a seating 25 in the bottom 26 of which is provided a circular opening 27 extended by a sleeve 28 in the interior of which is adapted to slide the tail 2%) of a press plunger whose head 30 is accommmlatcd in the interior of the seating 25.

The lower edge of the head 30 bears against the edges of the opening 27 and prevents the said press plunger from passing beyond a determined position correspending with'the shape of the cam at the it point which is at the smallest radius of curvature.

Between the lower face 31' of the press plungei and the outer surface of the cam is interposed the e11d32 of a pivoted lever 33 acting as a relay and which is hinged to plunger of which the lowerface rests on the lever) by an amount equal to the amount of the step 35.

This vertical movement of the relay and of the plunger is.transmitted to the carriage and to the mould which. are thus raised by the same amount, it being understood that at the start thecarriage rests dircctly on the upper face of the wall 36 of the casing, the upper face 37 of the plunger being; substantially on the same level as the upper face of the casing.

As soon as the step 35 of the cam leaves the end 32 of the lever 83, on the continued rotation of the cam, the lever-'33 and the plunger fall and instantly return so as to occupy the position in which they are shown in Figure 5. The carriage and the frame also fall, their fall being stopped by the coming into engagement of the lower face of the carriage with the upper face of the walls 36 of the casings 18 of the various lifting; devices.

If desired it is possible, as indicated above, to limit the amount of lifting and the amplitude of the fall of the carriage and of the mould by placing on the upper face of the walls 36 plates or linii'igs 38 such as indicated in chain dotted lines in Figure 5.

It will thus be readily seen that the plunger will not act upon the carriage and. the mould until after it has been raised a certain amount by the cam 2st and the end 32 of the relay lever 83.

The cams of the different lifting devices which are used are driven by means of a number of parallel shafts, two in the pres ent case, namely the shafts 39 and 4.0 which are supported in bearings ll and which, if they are in sections, the separate sections e2, 43 are connected together by means of flexible shafts or couplings 44:.

(if the separate parallel shafts only one, the shaft 40, is connected by means of a pulley to a driving source for producing" the rotation of all the shafts, the other parallel shafts (in the present case the shaft 89) being connected to the first shaft by means of pinions 4.6, l-7 and chains L8. By suitably mounting the cams on their shafts and by adjusting the connecting pinions it is possible to obtain as desired either an operation in synchronism'of all the jogging; de vices, which 1s to be recommended 1n the majority of cases, or an operation-with a certain lag; betweentl'ie separate jogging devices which in certain cases-maybe of advantage having regard to the nature of the wrnlt to be carried out.

Between the driving;source and the shaft l0 it' possible if desired to'provideany useful accessory members such asl'ly wheelsp reducing gear and so forth and more partu'zularly a clutch device dQso as to permit of. ad ust] exactly the extent at WlllCli I? the shaking operation to which the nrould is subjected is to take place as-also the infstant "at which this operation is to cease and consequently the duration thereof.

'lhe-niultiplieity ()fjUgfllllg devices acting in syluzh-ronism permits ofobtuining for the lifting of the carriage anaetion which is much better distributed than -inthe case whereasingle jogging device is used.

It also permits of usinga carriage of re duced weight for supporting; the mould thus resulting in a considerable economy from the point of view of the amount of energy expended.

The apparatus may be used for the manufacture of articles of dili 'erent dimensions and particularly for the manufacture of articles which are relatively long in relation to their width.

An apparatus provided with jogging devices suitably arranged in relation to one another can. be used for mouldii'ig railway sleepers of reinforced. concrete, these sleepers being used either for narrow gauge or for large gauge such as normal gauge.

Having thus described my invention, what I claim as new and desire to secure by Let ters Patent is:

l. ldechanical vibrating device for the manufacture of moulded. articles comprising a stationary frameiwn'k, a movable carriage, jogging elements arranged between the stationary frameworls: and the movable carriage, said. jogging elements each consisting of a box, a rotary shaft mounted in said box, a cam keyed to said shaft, parallel driving; shafts for actuating said cams, actuating means for saidshafts, and a clutch disposed between the actuating means and said shafts, a plunger fitted into the top of each of paid boxes and adapted to slide therein and a pivotally mounted lever of which the end is interposed between the cam and the lowerend of said plunger.

2. ll lechanical vibrating; device for the mamifacture of moulded articles comprising; a stationary framework, a movable carriage, jogging elements arranged between the stationary framework and the movable carriage, said jogging elements each consisting of a box, a rotary shaft mounted in said and of the mould,

between the actuating means andsaid shafts, a plunger fitted into the top of each of said boxes and adapted to slide therein and a pivotally mounted lever of which the end is interposed between the cam and, the lower end of said plunger, and means for adjusting the amplitude of the vertical movements of the carriage.

3. Mechanical vibrating device for the manufacture of moulded articles comprising a stationary framework, a movable carriage, jogging elements arranged between the stationary framework and the movable earriage, said jogging elements each consisting of a box, a rotary shaft mounted in said box, a cam keyed to said shaft, parallel driving shafts for actuating said cams, actuating means for said shafts, and a clutch disposed between the actuating means and said shafts,

a plunger fit ted into the top of each of said boxes and adapted to slide therein and a pivotally mounted lever of which the end is interposed between the cam and the lower end of said plunger, and removable linings fitted between the upper face of said box and the movable carriage.

4. Mechanical jogging device for the manufacture of molded articles comprising a support, a plurality of lifting devices carried in spaced relation by said support, each comprising a driven cam journaled in said support having an abrupt shoulder, and a plunger bearing on the contour of said cam, the plungers being adapted to support a mold, said plungers being arranged to fall abruptly from the abrupt shoulders of said cams in the cycle of operation of the latter and a pivoted butler member between each plunger and its cam.

CHARLES EDOUARD GEORGES LOUIS JARRETT-KNOTT.

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