US2080951A

US2080951A - Pile driver

Info

Publication number: US2080951A
Application number: US759979A
Authority: US
Inventors: Pfeiffer Paul
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-02-16
Filing date: 1934-12-31
Publication date: 1937-05-18
Anticipated expiration: 1954-05-18

Description

May 18, 1937. PFEIFFER 2,080,951

PILE DRIVER Filed Dec. :51, 19:54 2 sheetsr'sheet 1 Fig. 7 7, 2

\ Pfeijf May 18, 1937. pFElFFER I 2,080,951

FILE DRIVER Filed Dec. 31, 1934 2 Sheets-Sheet 2 Patented May 18, 1937 UNITED- STATES 11 m; DRIVER Paul Pfeifier, Altona, Germany Application December 31, 1934, Serial No. 759,979

In Germany February 16, 1934 3 Claims. (01. 611-774) This invention relates to improvements in pile drivers, and more particularly to novel means for connecting the runner or hammer lead to the supporting 'frame.

5 In the usual arrangement for mounting runners or hammer leads in pile drivers, the runner can swing at its upper end on a tilting device, and is adjustably connected at its lower portion for horizontal movement toward or away from 10 the supporting frame. With such arrangements, in order to change the position of the runner, especially in the vertical direction, adjustment must be made of the device carrying it. In other words, there is no provision made in the 15 structures heretofore proposed for vertically adjusting the runner relatively to the supporting frame.

It is therefore the primary object of the present invention to provide a pile driver structure in which the runner is swingable with its upper end on the head of the frame; is readily displaceable vertically relatively to said frame, and has its lower end mounted so as to be horizontally displaceable on the carriage by means of a spindle gear or other mechanical device.

This arrangement has the advantage that the height of the runner can be altered as required, without varying the inclination and the distance between the runner and the frame. It is also possible with this arrangement, for example, to obtain low positions of the runner for driving piles in trenches, while maintaining a sufiiciently great distance between the lower end of said runner and the frame to prevent the latter from l 35 slipping down the slope of the trench on account of the weight of the pile driver. Moreover, in driving piles with rearward inclination, the center of gravity of the whole pile driver can be arranged in such a manner that it remains within the tilting edge so that the pile driver remains stable.

The invention is illustrated in a constructional example in the accompanying drawings, in which Figs. 1 to 4 inclusive are side elevations illustrating the pile driver of my invention in different operating positions.

Fig. 5 is a perspective view illustrating the means for connecting the frame to the hammer lead.

50 Fig. 6 is a view partly in horizontal section and partly in top plan, showing the hammer lead connected to the head of the frame.

In accordance with the present invention, the pile driver frame a is pivotally connected at its 55 lower end, as indicated at b, to a carriage frame said carriage.

m, so that "it cannot be displaced relatively to The hammer lead or runner c of the device, on the other hand, is swingably mounted on the head or upper end of the frame by means of a bracket 9 which is rotatable about journal members d arranged in the head e of the frame. The runner is slidable in grooves s provided in the bracket, and for the purpose of vertically adjusting the runner relatively to said bracket, I provide a bolt or pin it adapted to slide through an aperture in said bracket and engage the surface of said runner, or register with spaced apertures arranged on the side wall of said runner. Any suitable means may be employed for normally forcing the pin against the runner to prevent the latter from accidentally moving upwardly or downwardly relatively to the bracket. If apertures are providedon the runner, for receiving the pin, conventional means may be employed for retracting the pin from said apertures when vertical adjustment of the runner is desired. As seen from Fig. 6, shafts f forming extensions of the journal members d, serve as bearings for the pulleys or idlers i which guide the hammer and pile lifting ropes. At this point it will be noted that the pin it will retain its position between the hammer lead and the bracket, regardless of the inclination of the lead with respect to the frame.

In setting up the device, the hammer lead 0 is connected to the bracket g by means of pin it which is carried by said bracket, and the latter is then suspended in bearings formed in the head e m the frame. The bearings, as best shown in Fig. 5, are preferably open at the top to facilitate attachment of the bracket to said frame. Due to this construction and the small weight of the bracket g, the insertion of the leader 0 in the slots s, which has to be done after the frame a has been erected, only requires little assistance on the part of the operator. This is particularly advantageous because at such heights, it would be very difficult to assemble the parts if they were of heavy construction.

As above stated, the runner is mounted on the carriage supporting the frame in such manner that it may be readily displaced horizontally by any suitable means such as a spindle gear as shown in Figs. 1 to 4 inclusive, or other suitable mechanical device. Such spindle gear or other conventional operating means may be carried by, a platform m supporting the carriage, and operate to advance or retire the carriage n holding the lower end of the runner 0, thus making the latter adjustable horizontally.

frame, means on said bracket for vertically ad-' justing said lead relatively to the frame, and means for displacing the lower end of the lead in a substantially horizontal direction toward or away from the lower end of said frame.

2. In a pile driver of the character described, a frame, a hammer lead, a bracket rotatably mounted on the upper end of said frame and connecting the upper portion of said lead to the frame for swinging movement relatively to said frame, a bolt slidable in said bracket and adapted to abut against said lead for vertically adjusting said lead relatively to said frame, and means for displacing the lower end of the lead in a substantially horizontal direction toward or away from the lower end of said frame.

3. In a pile driver of the character described including a hammer, a frame, a hammer lead, a bracket provided with laterally extending journal members rotatably mounted on the upper end of said frame, means on said bracket for connecting the upper portion of said lead to the frame for swinging movement relatively to said frame, means slidable in said bracket and adapted to engage said lead for vertically adjusting said lead relatively to said frame, said journal members extending laterally beyond the outer end of said frame, rope pulleys for raising and lowering said hammer, mounted on said lateral extensions of said journal members, and means for displacing the lower end; of the lead in a substantially horizontal direction toward or away from the lower end of said frame.

PAUL PFEIFFER.