US2219248A

US2219248A - Concrete placement apparatus

Info

Publication number: US2219248A
Application number: US278594A
Authority: US
Inventors: Jackson Corwill
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-06-12
Filing date: 1939-06-12
Publication date: 1940-10-22
Anticipated expiration: 1957-10-22

Description

Oct. 22, 1940. c. JACKSON CONCRETE PLACEMENT APPARATUS Filed June 12, 1959 2 Sheets-Sheet l I Q fi Nm. .,.m L\ S l l^` 0| o ES N OIO 0| OH Il. QN mm .wm

, Oct. 22, 1940. c. JACKSON CONCRETE PLACEMENT APPARATUS Filed June l2, 1959 2 Sheets-Sheet 2 QN R N @N mw m/ mon @fn/f' @cf/maf? E ATTORNEYS amenaza, '1940 UNITED STATES PATENT oFFlcE Corwill Jackson, Ludington, Mich.

Application June 12, 1939, Serial No. 278,594

15 Claims.

'Ihis invention relates to improvements inY concrete placement apparatus.

Themain objects of this invention are:

First, to provide a machine or apparatus for the placement of concrete such as pavements, concrete slabs, walls of ditches, conduits, or the like which is well adapted for use in the placement of concrete having relatively large aggregate with a relatively small amount of fines,

particularly where such concrete mixture is of low Water content.

Second, to provide a machine of this character which is capable of a wide range of ad` justment for the placement of concrete of different formulae as to aggregate, lines, cement and Water content.

Third, to provide an apparatus of this character which is simple in its adjustments and highly efficient.

Further objects pertaining to details and economies of my invention will definitely appear from the description to follow. The invention is defined in the claims.

A structure which embodies the features of my invention is clearly illustrated 1in the accompanyng drawings in which:

Fig. 1 is a fragmentary view in longitudinal section on line I--I of Fig. 2 of a concrete placement machine embodying my invention.

Fig. 2 is a fragmentary plan view, parts being omitted and other parts being sectioned for convenience in illustration.

Fig. 3 is a fragmentary view partially in section corresponding to that of Fig. 1 illustrating the parts in another adjustment from that shown in Fig. 1.

Fig. 4 is an enlarged fragmentary view of a modified form of vibrating means or unit.

Fig. 5 is av fragmentary sectional view showing o a modified form of vibrating element.

Fig. 6 is a fragmentary view partially in vertical section of a modified form or embodiment of the invention.

The present invention relates to the type of concrete placement machine illustrated in Patent No. 2,150,325, issued March 14, 1939, and is also an embodiment of and in some respects an improvement upon certain features shown in my application for Letters Patent Serial No. 234,918,

filed October 14, 1938. My present invention is especially desirable for use in the placement of low water content concrete having relatively large aggregate, a relatively small amount of nes, and as is usual in such cases a relatively high cement ratio.

In the placement of such concrete mixtures by vibratory methods there appears to be a. tendency for separation of the mortar from the aggregate, and by my improvements I am able to handle such concrete without objectionable dis- '5 placement or segregation of the aggregate.

In the embodiment of my invention illustrated, I represents the main carriage of a paving machine provided with a reciprocating screed 2 having a shoe 3 of substantial Width and an upstanding face plate 4 adapted to support a substantial amount of concrete to be placed as indicated at 5 in Figs. 1 and 3. This screed 2 is provided with forwardly projecting wings 6 at the ends thereof. These Wings overhang the side forms l which serve as tracks for the carrying wheels 8 of the main carriage. The screed reciprocates on the forms and is supported by the forwardly projecting arms 9 having rollers I0 thereon engaging the rear `of the screed (Fig. 1).. The screed is reciprocated by suitable pitman II. The details of reciprocating the screed form no part of this invention.

I provide an auxiliary vibratory element carrying frame which in this embodiment consists of the side members I2 and the tubular transverse member I3. These side members I2 are mounted on the push bar I4 pivotally mounted on the main carriage at I5. `The side members of the frame are secured to the push bars by means of the clamps I6.

The Wheeled supports I'I are pivoted at I8 on the side members of the frame and are provided with Wheels I9 which travel on the side forms. Means for adjustment of the wheeled supports are designated generally by the numeral 20 and., as these are described in detail in my above mentioned application Serial No. 234,918 I do not describe them herein. It will be noted that the tilting of the wheeled supports on their pivots will raise and lower the front ends of the push bars and thus raise and lower the frame carried thereby, consequently raising and lowering the part carried by the frame.

My improved vibratory element consists of a pair of elongated vibratory members 2| and 22 arranged in spaced parallel relation as is clearly illustrated in the drawings." These members are rigidly connected by pairs of vertically disposed tie plates 23 and 24, see Fig. 2. These tie plates are arranged in a vertical position and spaced relation as to the pairs and, the pairs to each other, and they are preferably' fof triangular' shape, although it will be understood that the shape may be greatly varied". 55

The vibratory members 2| and 22 are arranged through openings at the bottom angles of the tie plates and are welded to the tie plates as indicated at 25, Fig. 4, so that the members 2| and 22 and their connecting members become in effect an integral unit or element.

The vibrating unit, preferably an electric motor as shown in Figs. 1 and 2, the rotor of which is designated by the numeral 26, is provided with an unbalancing weight 21. 'I'he housing 28 of this motor is rigidly bolted or secured to and between the pairs of tie plates 24 and so that the axis of the rotor is substantially at the apex of the tie plates and longitudinally of the vibratory members. The axis of the rotor is in a plane substantially above and in a central relation relative to the members 2| and 22.

In the embodiment shown in Fig. 4 the rotor 29 is in the form of a shaft provided with an unbalancing weight 30, the rotor being driven by a flexible shaft 3|.

'I'he vibratory unit is supported for free vibratory action by means of the flexible non-extensible hangers 32 which are suspended from the brackets 33 rotatively'adjustable on the frame cross member I3, see Figs. 1 and 3. The adjustment is effected by loosening the U clamps 3l, properly adjusting the brackets, and tightening the clamps. The lower ends of the hangers 32 are engaged with the cross supports 35 extending between the pairs of tie members 23. 'I'he brackets are provided with forwardly projecting arms 36 to which the flexible non-extensible draft members 31 are connected.

It will be observed that by this arrangement the vibratory units may be tilted so that the forward vibratory unit is in a plane substantially below the rear vibratory unit as shown in Fig. 3, or they may be brought to a more nearly horizontal position relative to each other as shown in Fig. l, or it is obvious that they can be brought to a completely horizontal position or even with the front member in a plane above the rear member. To secure this adjustment the clamps I6 are also adjusted on the push bars I4.

With this arrangement of parts the material being treated may pass freely between the vibratory members. These members are preferably of cylindrical section and relatively small diameter. However, they are preferably so spaced relative to each other that the vibrations, as indicated by dotted lines in Fig. 1, induced by the separate members will merge. 'I'he rear member 22 is of such length that it lies within the wing 6, the front member being of such length'as to extend outwardly in advance of the wing.

With the vibratory elements thus formed and supported, they vibrate in a general orbital path but not a, true circular orbit; that is, the orbit with the vibrating unit placed and mounted as illustrated is found to be somewhat elongated in a vertical direction, but it will be understood that the amplitude of vibrations is not intended to be large. The rear vibratory member is positioned preferably as shown in Figs. 1 and 3, quite close to the front plate but spaced therefrom to permit the material to flow between the front plate and the vibratory member. It is also positioned so that the vibratory impulses extend beneath the shoe of the screed as I have indicated.

In the embodiment of my invention shown in Fig. 5, the

vibratory members

33 and 33 are of ovate cross section, pointed forwardly. 'I'hey are spaced, however, to permit the material to ow between them.

In Fig. 6 I illustrate a modification or addition to the features shown in Figs. 1 to 5, and it should be understood that lthe features here shown are commonly embodied in the commercial structures. These additions comprise a thrust arm I0 which is secured by the clips 4| to the vibratory element, the arm projecting upwardly and forwardly to coact with a resilient bumper 42 carried by the arm 36. These parts do not interfere with the free vibratory action of the vibrating element but do have the advantage of holding the vibratory element to the work in the event of its contacting an unusually compacted mass, i

and also to hold it in position when the machine is backed or retracted. Sometimes conditions develop where it is desirable to back up the machine, either to clear some object or to permit a second passage through the material treated.

I have illustrated and described my invention in embodiments which I have found highly satisfactory. I have not attempted to illustrate or describe various modifications and adaptations which are possible, as it is believed this disclosure will enable the adaptation of my invention as may be desired.

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

1. In a machine of the class described, the combination of a supporting frame mounted for vertical adjustment, a horizontally disposed vibratory element comprising laterally spaced elongated submersible members of rounded section, a plurality of vertically disposed tie members for said vibratory members whereby they are rigidly connected as a unit, a vibrating means comprising an unbalanced rotor having its axis disposed longitudinally relative to said vibratory members and in a plane substantially above and in a central relation thereto, flexible means for supporting said vibratory element comprising flexible non-extensible hangers connected to said tie members, the point of attachment being substantially alined with the axis of said rotor, flexible non-extensible draft members for said vibratory element, and tiltable arms on said frame to which the forward ends of said draft members are connected.

2. In a machine of the class described, the combination of a supporting frame mounted for vertical adjustment, a horizontally disposed vibratory element comprising laterally spaced elongated submersible members of rounded section, a plurality of vertically disposed tie members for said vibratory members whereby they are rigidly connected as a unit, a vibrating means comprising an unbalanced rotor having its axis disposed longitudinally relative to said vibratory members and in a plane substantially above and in a central relation thereto, and flexible means for supporting said vibratory element comprising exible non-extensible hangers carried by said supporting frame and connected to said tie members, the point of their attachment to the tie members being substantially in alinement with the axis of said rotor.

3. In a machine of the class described, the combination of a supporting frame, a horizontally disposed vibratory element comprising laterally spaced elongated submersible elements, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, a vibrating means for said vibratory element, flexible means for supporting said vibratory element comprising flexible non-extensible hangers carried by said supporting frame and connected to said tie members, iiexible non-extensible draft members for said vibratory element. and tiltable arms on said frame to which the forward ends of said draft members are connected.

4. In a machine of the class described, the combination of a supporting frame, a horizontally disposed vibratory element comprising laterally spaced elongated submersible members, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, a vibrating means for said vibratory element, and flexible means for supporting said vibratory element comprising flexible non-extensible hangers connected to said tie members.

5. In a machine of the class described, the combination of a supporting frame, a horizontally disposed vibratory element comprising laterally spaced elongated submersible members, a plurality of tie members for said vibratory members whereby they are rigidly connected as a unit, a vibrating means for said vibratory element, and means for supporting said vibratory element on said frame permitting vibration thereof.

6. In a machine of the class described, the combination with a supporting unit provided with means for vertical adjustment thereof, a vibratory element carried by said supporting unit for vertical adjustment therewith and comprising horizontally spaced elongated submersible vibratory members rigily connected for vibratory action as a unit and spaced to permit the passage therebetween of material being treated but in such relation that the vibratory impulses imparted to the material by the vibratory members will merge, a vibrating unit mounted in a substantially spaced vertical relation to said vibratory members and comprising an unbalanced rotor disposed with its axis in parallel relation to said vibratory members and connected thereto so that its vibratory action is imparted to both members, and means for supporting said vibratory element and said vibratory means therefor permitting free vibratory action thereof asa unit.

'7. In a machine of the class described, the combination with a supporting unit provided with means for vertical adjustment thereof, a vibratory element carried by said supporting unit for vertical adjustment therewith and comprising laterally spaced elongated submersible vibratory members rigidly connected for vibratory action as a unit and spaced to permit the passage therebetween of material beingtreated but in such relation that the vibratory impulses imparted to the material by the vibratory members will merge, a vibrating means for said vibratory element, and means for supporting said vibratory element and said vibratory means therefor permitting free vibratory action thereof as a unit, said supporting means being such as to permit tilting adjustment of said vibratory element for raising and lowering the vibratory members relative to each other.

8. In a machine of the class described, the combination with a supporting unit provided with means for vertical adjustment thereof, a vibratory element carried by said supporting unit for vertical adjustment therewith and comprising laterally spaced elongated submersible vibratory members rigidly connected for vibratory action as a unit and spaced to permit the passage therebetween of material being treated but in such relation that the vibratory impulses imparted to the material by the vibratory members will merge, a vibrating means for said vibratory element, and means for supporting said vibratory element permitting free vibratory action thereof as a unit.

9. In a machine of the class described, the combination with a screed provided with a front plate adapted to support a substantial amount of material to be treated, of aA vibratory element comprising a pair of elongated horizontally disposed submersible vibratory members rigidly connected in laterally spaced relation, and a vibrating means comprising an unbalanced rotor mounted centrally relative to said vibratory members and in a plane substantially above the vibratory members so that the vibrations of said vibrating means are imparted to the vibratory element as a unit, said vibratory members being spaced to permit passage of materials vibrated around and betweenl the same, the rear vibratory member being in such proximity to the face plate of the screed and the bottom of the screed as to impart vibratory motion to the material treated supported by the face plate of the screed and substantially below the bottom of the screed.

10. In a machine of the class described, the combination with a screed provided with a front plate adapted to support a substantial amount of material to be treated, of a vibratory element comprising a pair of elongated horizontally disposed submersible vibratory members rigidly connected in laterally spaced relation, and a vibrating means for said vibrating element, said vibratory members being spaced to permit passage of materials vibrated around and between the same, the rear vibratory member being in such proximity to the face plate of the screed and the bottom of the screed as to impart vibratory motion to the material treated supported by the face plate of the screed and substantially below the bottom of the screed, said rear vibratory member being spaced from the screed to permit the' passage of aggregate of substantial size between the face plate of the screed and the vibratory member.

11. In a machine of the class described, the combination with a screed provided with a front plate adapted to support a substantial amount of material to be treated, of a vibratory element comprising a pair of elongated horizontally disposed submersiblevibratory members rigidly connected in laterally spaced relation, `and a vibrating means for said vibrating element, said vibratory members being spaced to permit passage of materials vibrated around and between the same, the rear vibratory memberbeing in such proximity to the face plate of the screed and the bottom of the screed as toimpart vibratory motion to the material treated supported by the face plate of the screed and substantially below the bottom of the screed.

12. In a machine of the class described, the

combination with a supporting unit provided with means for vertical adjustment thereof, a vibratory element carried by said supporting unit for vertical adjustment therewith and comprising laterally spaced. elongated submersible vibratory members rigidly connected for vibratory action as a unit and spaced to permit the passage therebetween of material being treated, a vibrating means for said vibratory element, means for supporting said vibratory element permitting vibratory action thereof as a unit comprising flexible non-extensible hangers, draft arms carried by said supporting unit projecting downwardly and forwardly in advance of said vibratory unit, flexible non-extensible draft members connecting said vibratory element to.

said arms, upwardly and forwardly projecting thrust arms on said vibratory element, and bumper members on said draft arms normally out of contact with said thrust arms but with which said thrust arms may engage on the relative forward swinging movement of said vibratory element.

13. In a machine of the class described, the combination with a supporting unit provided with means for 4vertical adjustment thereof, a vibratory element carried by said supporting unit for vertical adjustment therewith, a vibrating means for said vibratory element, means for supporting said vibratory element permitting vibratory action thereof as a unit comprising exible non-extensible hangers, draft arms carried by said supporting unit projecting downwardly and forwardly in advance of said vibratory unit, flexible non-extensible draft members connecting said vibratory element to said arms, upwardly and forwardly projecting thrust arms on said vibratory element, and bumper members on said draft arms normally out of contact with said thrust arms but with which said thrust arms may engage on the relative forward swinging movement of said vibratory element.

14. In a machine of the class described, th..-

combination with a supporting unit, a vibratory element carried by said supporting unit and comprising laterally spaced elongated submersible vibratory members rigidly connected for vibratory action as a unit and spaced to permit passage therebetween of material being treated, a vibrating means for said vibratory element, means for supporting said vibratory element Dermitting vibratory action thereof as a unit and permitting swinging movement, flexible non-extensible draft members for said vibratory element, forwardly disposed thrust members on said vibratory element, and bumper members on said supporting unit normally out of contact with said vibratory element but with which said thrust members may engage on the relative forward swinging movement of said vibratory element.

15. In a machine of the class described, the

combination with a supporting unit, a vibratory element carried by said supporting unit, a vibrating means for said vibratory element. means for supporting said vibratory element permitting vibratory action thereof as a unit and permitting swinging movement, flexible non-extensible draft members for said vibratory element, forwardly disposed thrust members on-said vibratory element, and bumper members on said supporting unit normally out of contact with said vibratory element but with which said thrust membersmay engage on the relative forward swinging movement of said vibratory element.

CORWILL JACKSON.