US3828954A

US3828954A - Machines for displacing building sections

Info

Publication number: US3828954A
Application number: US00333030A
Authority: US
Inventors: H Nieuwenhoven; Der Lely C Van
Original assignee: Individual
Current assignee: C Van der Lely NV
Priority date: 1972-02-17
Filing date: 1973-02-16
Publication date: 1974-08-13
Anticipated expiration: 1991-08-13
Also published as: DE2307332A1; BE795513A; JPS4889530A; FR2172138B1; NL7202064A; FR2172138A1; IT979122B; CA1001587A

Abstract

A machine for displacing building sections of parallelepiped configuration intended for construction of prefabricated buildings which has a main girder and four extensible legs adapted to straddle a section with the girder above the section. Four carrying arms each having generally the configuration of an inverted ''''L'''' depend from each side of the girder, are pivotedly connected to the girder, and through hydraulic cylinders are selectively movable relative thereto. At the base of each arm is a strip extending inwardly having responsive means for signalling when the strip is properly engaged under a section. Each leg has a group of steerable ground wheels with the forward groups being powered by hydraulic motors, the steering, motive and carrying functions of the machine also being part of a hydraulic system and controlled from a driver''s platform in the forward part of the machine, signals from the responsive means on each strip being displayed at the driver''s platform.

Description

United States Patent 1191 van der Lely et a].

1451 Aug. 13, 1974 MACHINES FOR DISPLACING BUILDING SECTIONS 3,541,598 11/1970 Dousset ..2l4/392 Primary ExaminerRobert G. Sheridan [76] Inventors: 3:25 :53; g sgag Assistant Examiner-R. B. Johnson Attorney, Agent, or FirmMason, Mason & Albright Jacobus Cornehs Nleuwenhoven, Hirssattelweg, 6340, Baar, both of Switzerland [57] ABSTRACT A machine for displacing building sections of parallel- [22] Filed 1973 epiped configuration intended for construction of pre- [2l] Appl. No.: 333,030 fabricated buildings which has a main girder and four extensible legs adapted to straddle a section with the girder above the section. Four carrying arms each hav- [30] Fore'gn Apphcatlon Pnomy Data ing generally the configuration of an inverted L de- FCb. l7, Netherlands .L p d f om ea h ide of the girder are pivotedly connected to the girder, and through hydraulic cylinders [52] US. Cl. 214/392, 214/394 are Selectively movable relative theretu At the base of [51] Int. Cl B60p 3/00 each arm i a Strip extending inwardly having respon Fleld Search 214/392, sive means for signalling when the strip is properly en- 214/1 1 1 H gaged under a section. Each leg has a group of steerable ground wheels with the forward groups being [56] References and powered by hydraulic motors, the steering, motive and UNITED STATES PATENTS carrying functions of the machine also being part of a 2,941,675 6/1960 Noble et al. 214/650 so hydraulic System and Controlled from a drivers P 3,019,926 2/1962 Christenson 214/392 form in the forward part of the machine, signals from 3,034,675 5/1962 Quayle 214/730 the responsive means on each strip being displayed at 3,322,454 5/1967 Mindrum 214/650 SG the driver platfonn 3,381,833 5/1968 Gordon 214/392 3,396,861 8/1968 HOUIKOH 214/392 46 Clams, 7 Drawing Flgures ail .2

Ill //1! MACHINES FOR DISPLACING BUILDING SECTIONS SUMMARY OF THE INVENTION This invention relates to a machine for displacing space-bounding building sections.

According to the present invention there is provided a machine for displacing space-bounding building sec- BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a machine for displacing space-bounding building sections,

FIG. 2 is a plan view of the machine of FIG. 1,

FIG. 3 is an end view of the machine of FIG. 1, taken in the direction of arrow III in FIG. 1,

FIG. 4 is a view of the base of a carrying arm of the machine taken on the line IV-IV in FIG. 1,

FIG. 5 is a side view on a large scale of a group of ground wheels of the machine,

FIG. 6 is a view of the group of ground wheels of FIG. 5 taken in the direction of arrow VI in FIG. 5,

FIG. 7 is a side view illustrating how the machine of FIGS. 1 to 6 can be utilized to load a transport vehicle.

DESCRIPTION OF THE PREFERED EMBODIMENT The machine shown in FIGS. 1 to 6 has a main girder 1, extending in the direction of length of the machine. This main girder l is fabricated from

corner beams

2, 3, 4 and a further beam not visible, extending in the direction of length of the girder, a sheet upon side 5, and sheet sidewalls 6. At a distance indicated by dimension 7 inwards from one end of the main girder 1 transverse beams 8 and 9 extend at right angles from the girder on either side thereof. At a distance indicated by dimension 10 inwards from the other end of the main girder 1 similar

transverse beams

11 and 12 also extend at right angles from the main girder l on either side thereof. The dimensions 7 and 10 are equal, each amounting to about one seventh of the over-all length 131 of the main girder 1. The main girder 1 and the

transverse beams

8, 9, 11 and 12 are horizontal and constitute the top part of the machine.

The free end portions of the

transverse beams

8, 9, 11 and 12 mount, on their lower faces, the upper ends of supporting legs l3, 14, and 16, to each of which a vertical shaft (legs 15 and 16) or 137 (legs 13 and 14) is journalled, each of which in turn mounts a ground wheel group formed by four ground wheels. To this end, and referring to the leg 15 which has a ground wheel group 17, at its lower end of shaft 20 carries an inverted U-shaped bracket 21, the web 28 of which is secured to the shaft 20 and the two limbs of which are designated 24 and 26. At the lower ends of the

limbs

24 and 26 rocking

arms

22 and 23 pivot about

horizontal stub shafts

29 and 30. The mounting of the

rocking arms

22 and 23 is reinforced by stiffening arms and 27, extending parallel to the

limbs

24 and 26, the rocking arm 22 being pivotal between the lower ends of the limb 24 and the arm 25 and the rocking arm 23 being pivotal between the lower ends of the limb 26 and the arm 27. The corresponding free ends of the rocking

arms

22 and 23

carry stub shafts

33 and 34, and 40, A, which respectively pivotally support

brackets

32 and 39 extending in the intended direction of travel of the machine. The

brackets

32 and 39 respectively embrace pairs of

ground wheels

35, 36, and 38, 42, respectively mounted on, for rotation in common,

horizontal axles

37 and 41, these axles being respectively journalled in the

brackets

32 and 39. The

ground wheels

35, 36 and 38, 42 thus form two pairs of ground wheels, which form together the ground wheel group 17 on the vertical shaft 20 of the supporting leg 15. Like the leg 15 the shaft 20 of the leg 16 carries an inverted U-shaped bracket 19 having a ground wheel group 18 formed by four

ground wheels

43, 44, 45 and 46. The ground wheel group 18 is arranged in the same manner as the ground wheel group 17 so that further description may be omitted.

By means of the shaft 137 the leg 13 is provided with a bracket 47, similar to the bracket 21. The bracket 47 carries a ground wheel group 48 of four ground wheels in the same manner as the

ground wheels

35, 36, 38 and 42 on the bracket 21. Similarly the supporting arm 14 is provided with a bracket 49 having a group of ground wheels 50. The construction of this ground wheel group is similar to that of the ground wheel group 17 and it will therefore not be described in detail.

Thus the machine has four ground wheel groups, two of which 48 and 50 are located at the front with respect to the intended direction of forward movement 98 of the machine, and the remaining two of which 17 and 18 constitute the rearmost ground wheel groups of the machine. The foremost

ground wheel groups

48 and 50 are coupled with a prime mover and constitute driven ground wheels. Thus, referring to FIGS. 5 and 6, the ground wheel group 48 comprises one pair of coupled

ground wheels

56 and 57 and one pair of coupled

ground wheels

58 and 59. The

ground wheels

56 and 57 are mounted in a bracket 99, similar to the bracket 32 in FIG. 3. The

ground wheels

58 and 59 are mounted in a bracket 97, similar to the bracket 39 of FIG. 3. The bracket 99 is provided with a support hood 51 which extends around the

wheels

56 and 57 and is connected with the two opposite limbs of the bracket 99. The support hood 51 carries a hydraulic motor 52, which is linked by means of a chain sprocket 53 and a chain 55 to a chain sprocket 54 which is coupled with the pair of

ground wheels

56 and 57. The bracket 97 has a support hood which extends around the

wheels

58 and 59 between the front and rear limbs of the bracket 97. The support hood 60 carries a hydraulic motor 61 having a chain sprocket 62 which is linked by a chain 64 to a chain sprocket 63 which is coupled with the pair of

ground wheels

58 and 59. The

motors

52 and 61, as will be apparent from the side view of FIG. 5, are arranged relatively on the sides of a V with respect to the rotational axis of the ground wheels, located on

radial lines

135 and 136. At the front of the machine the main girder 1 carries a pump which constitutes the prime mover for the hydraulic system of the machine and which drives the

hydraulic motors

52 and 61 through

ducts

71 and 72, 73 and 74 respectively. The ground wheel group 50, like the ground wheel group 48, is similarly driven. Preferably all the ground wheels have solid tires.

On the top of the machine a steering cylinder 80 of a hydraulic steering mechanism is mounted for controlling the four

ground wheel groups

17, 18, 48 and 50'at the lower ends of the supporting

legs

15, 16, 13 and 14. The steering cylinder 80 is a hydraulic device also fed from the hydraulic system of the machine and is coupled with

arms

132 and 133 pivotable about a common shaft 81, the arm 133 being coupled through a coupling rod 82 with a vertical shaft 83. The shaft 83 is located perpendicularly above the vertical support shaft 137 of the ground wheel group 48 and is connected therewith for'turning the shaft 137 about its longitudinal center line. The shaft 83 is also coupled through a steering rod 84 with a vertical shaft 85 which is in line with and connected to the vertical shaft supporting the ground wheel group 50 for turning this last-mentioned shaft about its longitudinal center. The steering cylinder 80 is connected via the arm 132 and a coupling rod 86 with a vertical shaft 87 connected through a further steering rod 88 with a vertical shaft 89. The

shafts

87 and 89 are respectively coupled with the vertical shafts 20 of the

ground wheel groups

17 and 18.

At the front of the machine a control-platform 90 is provided with a drivers seat 91 and a steering wheel 94 hydraulically connected with the steering cylinder 80. From the control-platform 90 a control-member 92 is coupled with the driving motors of the

ground wheel groups

48 and 50.

The machine has eight carrying arms 100 to 107 pivoted to the main girder 1 with four carrying arms disposed equi-spaced apart on each side of the girder l. The arm 100 is provided with a stair 170 and a railing 172 to be able to reach the control-platform 90. The foremost and rearmost carrying arms are fastened to the front and the rear ends respectively of the main girder 1. As will be described more fully for one carrying arm 103, the carrying arms are secured to the main girder 1 so as to be pivotable about horizontal pivotal shafts 108. These pivotable shafts 108 are parallel to the main girder l and to the direction of movement 98.

The carrying arm 103 has at its root a supporting bearing 109 extending parallel to the main girder l and arranged between

supports

110 and 111 fastened to the main girder 101. The carrying arm 103 is cranked so that it provides a substantially horizontal portion 112 and a substantially vertically extending portion 113. The connection of the portion 112 with the portion 1 13 is reinforced by a fillet 114. Between the portion 112 and the

supports

110 and 111 on the main girder 1 an actuating mechanism formed by a hydraulic jack 115 is provided, secured to the

supports

110 and 111 so as to be pivotable about a shaft 117. The other end of the jack 115 is secured to the portion 112 of the supporting arm 103 so as to be pivotable about a pivotal shaft 116. The lower, free, end of the supporting arm 113 is provided with an extension 118. This extension 118 is formed by two

bent strips

119 and 120 shown best in FIG. 4. The extension 118 is secured by means of the strip 120 to the lower, free, end of the supporting arm 113. The ends of the

strips

119 and 120 remote from the supporting arm 113 are secured to each other and constitute a supporting foot over a length 121. The strip 120 is provided with a screening hood 122, a vertical side 123 of which forms a stop. The side 123 has an opening through which a feeler 124 extends so that it projects out of the side 123 above the base of the supporting foot. The feeler 124 is one portion of a cranked rocker arm adapted to move about a pivotal shaft 125 and co-operating with an electric contact 126. The end 128 of the rocker arm remote from the feeler 124 cooperates with a compression spring 127, which acts to urge the end 128 of the rocker arm against the strip 120.

Each of the carrying arms to 107 is connected with the main girder l by a hydraulic jack such as the jack and each has a supporting foot as just described at its free end. The jacks 115 are controllable in common from the drivers seat by means of a control-arm 93 so that the carrying arms can be moved to any one of a plurality of positions relative to the machine frame. On either side the drivers platform 90 has a row of signalling lamps of an indicator system, the number of which corresponds with the number of carrying arms. With respect to the direction of movement 98 the drivers platform 90 has on the left-hand side four signalling lamps 155 and on the right-hand side four signalling lamps 156. The signalling lamps 155 cooperate with the feeler arms 124 of the carrying arms 100 to 103 and the signalling lamps 156 co-operate with the feeler arms 124 of the carrying arms 104 to 107.

The machine described above is capable of displacing large building sections in a simple manner. The machine is particularly suitable for large, space-bounding building sections to be employed to erect a building, being building sections that are wholley or partly prefabricated and bound spaces so that a section forms part of the space of a building, for example, part of one or more rooms. A section has a floor, walls and a top which may form a ceiling and, for example, a roof. The Figures illustrate how a building section is carried in the machine to be displaced thereby. The width 140 of the section is about 2.50 ms (FIG. 3). The section has a length of about 11 ms (FIG. 1), corresponding with the length 141 of the machine.

The building sections can be picked up by the carrying arms of the machine. For this purpose the machine is moved to straddle a building section and the carrying arms are pivoted inwardly so that the supporting feet at the lower, free, ends of the carrying arms are moved to beneath the bottom of the building section so that the supporting feet are located, by the distance 121 (FIG. 4), beneath the building section. When the supporting feet are thusin place beneath the building sections, the main part of the machine is lifted as a whole by displacing the four ground wheel groups in a direction of height with respect to the carrying arms. The section is thus displaced in a direction of height. For this displacement of the ground wheel groups the shafts of the ground wheel groups, such as the shaft 20, are shifted in a direction of height with respect to the supporting arms 15. This displacement of the shafts with respect to the supporting arms is performed by hydraulic motors (not shown) disposed in the supporting arms, connected by transmission means with the shafts of the ground wheel groups, and fed from the hydraulic system 70. Owing to this displacement of the ground wheel groups with respect to the supporting arms, the whole machine frame is lifted so that the arms with the building section bearing on the supporting feet of the arms are moved upwards. Although in this form the whole frame of the machine is moved upwards or downwards for the vertical displacement of a building section, it is possible, as an alternative, to mount the carrying arms on the frame, for example, on the main girder 1, so as to be displaceable in a direction of height with respect thereto. When the building section is elevated to a sufiicient extent from the ground, the machine can be displaced as a whole in a horizontal direction by driving the

ground wheel groups

48 and 50 by means of the hydraulic motors associated therewith. In this way building sections can be transported by the machine to, for example, a storeroom.

The machine is also particularly suitable for loading or unloading the building sections on or off a transport vehicle, either from or to a storeroom, or directly from their place of manufacture onto a transport vehicle. FIG. 7 illustrates how a building section can be placed by the machine on a transport vehicle 152. In order to arrange the building section on the transport vehicle,

the ground wheel groups are displaced in a direction of parked so that the machine can ride in its direction of length over the loading platform 153 of the transport vehicle so that the building section as a whole is moved to above the loading platform 153. Then the ground wheel groups are displaced relatively to the carrying arms so that the frame of the machine with the carrying arms and the building section held by the arms moves downwards until the building section bears on the loading platform 153, as shown in FIG. 7. The arms are then moved to withdraw the supporting feet from below the building section, the carrying arms 100 to 103 being pivoted in the direction of the arrow 145 (FIG. 3) about the pivotal shafts 108 and the carrying arms 104 to 107 being pivoted in the direction of the arrow 146 about their pivotal shafts. These movements of the carrying arms are effected by actuation of the hydraulic jacks 115.

When the supporting feet have. been removed from beneath the section, the transport vehicle with the section located thereon can be driven from beneath the machine or the machine can be driven away from the transport vehicle. For picking up a section the supporting feet can be inserted beneath the section by actuating the hydraulic cylinders 115 so that the carrying arms located on opposite sides of the main girder 1 approach each other. The feelers 124 initiate signals observable at the drivers seat when the supporting feet have completely covered the distance 121 beneath the building section, since when the carrying arms reach the positions which the building section touches the stops 123, the feelers 124 are moved around their pivotal shafts against the pressure of their springs 127 to switch the electric contact 126 so that the signalling

lamps

155 and 156 near the drivers seat are illuminated. The feelers 124 together with the signalling lamps constitute an indicator system for informing the driver of correct engagement of the supporting feet with the section. The movement of the carrying arms about their pivotal shafts is then stopped by the driver. The feelers may, as an alternative, be coupled so that they automatically stop the movement of the carrying arms when the stops 123 come into contact with the section. At the drivers seat it can thus be checked that the supporting feet are located in a correct manner beneath the building section and the building section is satisfactorily supported on the feet of the carrying arms. A displacement of the supporting feet relative to the building section such that the distance 121 is not fully employed is immediately perceivable since the feelers 124 are then no longer in contact with the section and the signalling

lamps

155 or 156 near the drivers seat will go out.

The carrying arms hold the building section on its bottom face for displacement. The load produced by the section, particularly if it is to be used for part of a story, is approximately equal to the load exerted at its place in the building. This is advantageous to the manufacture of the sections, since in this case no special precautions have to be taken for transport by the machine. By arranging the main girder of the machine at the top, a section can be engaged effectively from the main girder on either side by the carrying arms. The motors and other gear can be advantageously supported by the main girder. By arranging the main girder centrally extending in the direction of length of the machine a satisfactory distribution of load in the machine is obtained. Owing to the shape of the carrying arms by which the upper portion 112 is substantially horizontal and the remaining portion 113 can be arranged at a small angle to the perpendicular, so as to be inclined downwards towards the center of the machine (see FIG. 3), the distance between the upper parts of the portion 1 13 of the carrying arms to 103 and the carrying arms 104 to 107 is greater above the lower free ends of the carrying arms than between the lower free ends. This facilitates picking up a section, because a section may be wider at the top, for example, owing to a projecting roof edge, than at the bottom, as is shown at 147 in FIG. 3. From the platform at the front high up in the machine the driver can satisfactorily supervise operation of the machine. The height of the main girder above the ground is adjustable so that a section of height of about 3 ms can be lifted and placed on a transport vehicle. The distance over which the main part of the machine can be displaced in a direction of height can be chosen to some extent by means of the length 151 (FIG. 1) of the supporting shafts of the ground wheel groups.

While various features of the machine that have been described, and that are illustrated in the drawings, will be set forth in the following claims as inventive features, it is to be noted that the invention is not necessarily limited to these features and that is encompasses all of the features that have been described and illustrated both individually and in various combinations.

What we claim is:

l. A machine for displacing space-bounding building sections of parallelepiped configuration intended as part of a prefabricated building, the machine comprising a frame which is adapted to be movably supported on and extend above a horizontal supporting surface, a plurality of carrying arms provided on said frame, said carrying arms including engagement means by which a said building section can be received and supported, and lift means provided on said frame by which said carrying arms can be displaced in a direction of height with respect to the surface supporting the machine, an operators controls included in said machine, said engagement means including sensor means adapted to determine whether each engagement means is correctly positioned relative to a building section received by the machine, and signal means associated with the sensor means to signal the operator of the position of said engagement means.

2. A machine as claimed in claim 1, having a drivers seat and said controls near the drivers seat for actuating the carrying arms and said engagement means.

3. A machine as claimed in claim 1, wherein the engagement means comprise extensions adapted to be inserted beneath a building section to be displaced, on which extensions the section can bear at least partly.

4. A machine as claimed in claim 3, wherein each extension is rigidly secured to the free end of its associated carrying arm.

5. A machine as claimed in claim 4, and comprising a stop associated with one of the extensions for determining that this extension is correctly positioned relatively to a building section for lifting this building section.

6. A machine as claimed in claim 5, said sensor comprising a feeler associated with one of the extensions for sensing correct positioning of the extension relative to a building sections and transferring a relevant signal.

7. A machine as claimed in claim 6, wherein the feeler is located near the stop.

8. A machine as claimed in claim 7, including a drivers seat wherein the feeler is connected to an indicator system located near the drivers seat.

9. A machine as claimed in claim 7 wherein the feeler is part of an electric indicator system.

10. A machine as claimed in claim 1, wherein the carrying arms are movable arranged on said frame of the machine.

11. A machine as claimed in claim 10, wherein at least one of the carrying arms is pivotally secured to the machine frame near the top of the machine.

12. A machine as claimed in claim 11, wherein the pivotal axis of said one of the carrying arms extends substantially in the direction of length of the machine.

13. A machine as claimed in claim 12, wherein said one of the carrying arms is selectively hydraulically movable and fixable in any one of a plurality of positions relative to the frame.

14. A machine as claimed in claim 13, wherein a hydraulically operated jack is arranged between said one of the carrying arms and the frame near the pivotal axis of this carrying arm.

15. A machine as claimed in claim 14, wherein said one of the carrying arms comprises a portion pivoted to the frame that can adopt a substantially horizontal position and thus is connected with a mainly downwardly extending portion.

16. A machine as claimed in claim 10, wherein the frame is provided with a plurality of ground wheels.

17. A machine as claimed in claim 10, wherein the frame is provided with groups of ground wheels.

18. A machine as claimed in claim 10, wherein the frame comprises a main girder located on the top of the machine and extending in the direction of length of the machine.

19. A machine as claimed in claim 18 including ground wheels, wherein on either side of the main girder transverse beams are provided, on which said ground wheels are mounted.

20. A machine as claimed in claim 19, wherein on either side of the main girder two transverse beams are provided, on the lower faces of which the ground wheels are coupled.

21. A machine as claimed in any one of claims 18, wherein each of the transverse beams is provided at its free end with a downwardly orientated supporting arm, the lower end of which is provided with one of the ground wheels.

22. A machine as claimed in claim 21, wherein each supporting arm extends substantially vertically and each transverse beam extends substantially horizontally.

23. A machine as claimed in claim 22, wherein near one end of the machine two transverse beams extend transversely of the main girder, and wherein near the other end of the machine also two transverse beams are arranged on opposite sides of the main girder at right angles to the main girder.

24. A machine as claimed in claim 23, wherein on either side of the main girder two or more supporting arms are provided, each supporting arm having an extension and the extensions of opposite arms facing each other.

25. A machine as claimed in claim 24, wherein the supporting arms are pivotally secured to the main girder.

26. A machine as claimed in claim 25, wherein at least two of said ground wheels of the machine are steerable ground wheels.

27. A machine as claimed in claim 26, wherein the steerable ground wheels are adapted to turn about vertical axes.

28. A machine as claimed in claim 27, wherein all ground wheels of the machine are steerable.

29. A machine as claimed in claim 28, wherein the machine is supported from four ground wheel groups, each having at least two of said ground wheels.

30. A machine as claimed in claim 29, wherein at least one ground wheel of a ground wheel group is pivotally arranged on a rocking arm and is pivotable about a horizontal axis extending substantially in the intended direction of operative travel of the machine, this rocking arm being pivotally mounted on a support connected with the frame.

31. A machine as claimed in claim 30, wherein the support is mounted on one of the carrying arms of the machine by means of an upright supporting shaft.

32. A machine as claimed in claim 31, wherein the upright supporting shaft is a shaft about which the steerable wheels are adapted to turn.

33. A machine as claimed in claim 26, wherein the steerable wheels are governed hydraulically.

34. A machine as claimed in claim 33, wherein the ground wheels are provided with solid tires.

35. A machine as claimed in claim 34, wherein at least two of the ground wheels are driven wheels.

36. A machine as claimed in claim 35, wherein the means by which the carrying arms can be displaced in a direction of height are arranged near the ground wheels so that the ground wheels can be displaced in a direction of height with respect to the machine frame and be selectively fixed in any one of a plurality of positions relative to the frame.

37. A machine as claimed in claim 36, wherein driving motors for said ground wheels are arranged near the wheels and are displaceable with the wheels in a direction of height with respect to the machine frame.

38. A machine as claimed in claim 37, wherein the driven wheels are located at the front of the machine with respect to the intended direction of operative travel of the machine.

39. A machine as claimed in claim 38, including a hydraulic pump wherein the driving members for the wheels are formed by hydraulic motors fed from said pump in the machine.

40. A machine as claimed in claim 39, wherein the hydraulic motors are connected on supporting hoods covering the wheels.

41. A machine as claimed in claim 39, wherein above the wheels of a group of said ground wheels two hydraulic motors are arranged, each of which is coupled with one wheel, the wheels so coupled with the motors being relatively independently rotatable about their axles.

42. A machine as claimed in claim 41, wherein viewed from the side the two hydraulic motors on the ground wheel group are arranged in the shape of a V 46. A machine for displacing building sections of parallelepiped configuration intended as part of a prefabricated building, the machine comprising:

a frame including a longitudinal girder;

four legs extending from said girder for supporting same, two of said legs proximate the forward portion of said girder and the other two proximate the after portion of said girder, ground engaging wheels mounted at the base of each said leg;

a plurality of carrying arms hingedly connected to said girder and at least two of said arms depending on both sides thereof for carrying a building section, said legs and said arms adapted to straddle the section, said arms having generally the configuration of an inverted L, means for moving each arm relative to said girder connected thereto;

engagement means connected to the base of each said arm adapted to engage the section for lifting same;

responsive means included in each engagement means for signalling when it properly engages the section; and

lift means associated with said girders for causing same to move vertically relative said ground engaging wheels whereby said carrying arms depending from said girder are enabled to be raised and lowered together and selectively to engage the section by movement caused by said means for moving each arm with said responsive means signalling the machines operator when each arms engagement means is in proper engagement for lifting the section.

Claims

1. A machine for displacing space-bounding building sections of parallelepiped configuration intended as part of a prefabricated building, the machine comprising a frame which is adapted to be movably supported on and extend above a horizontal supporting surface, a plurality of carrying arms provided on said frame, said carrying arms including engagement means by which a said building section can be received and supported, and lift means provided on said frame by which said carrying arms can be displaced in a direction of height with respect to the surface supporting the machine, an operator''s controls included in said machine, said engagement means including sensor means adapted to determine whether each engagement means is correctly positioned relative to a building section received by the machine, and signal means associated with the sensor means to signal the operator of the position of said engagement means.

2. A machine as claimed in claim 1, having a driver''s seat and said controls near the driver''s seat for actuating the carrying arms and said engagement means.

8. A machine as claimed in claim 7, including a driver''s seat wherein the feeler is connected to an indicator system located near the driver''s seat.

21. A machine as claimed in any one of claims 18, wherein each of the transverse beams is provided at its free end with a downwardly orientated supporting arm, the lower end of wbich is provided with one of the ground wheels.

42. A machine as claimed in claim 41, wherein viewed from the side the two hydraulic motors on the ground wheel group are arranged in the shape of a V with respect to the axles of the ground wheels with which they are coupled.

43. A machine as claimed in claim 8, including a main girder on said frame wherein the driver''s seat is arranged near one end of the machine on said main girder.

44. A machine as claimed in claim 43, wherein on each longitudinal side of the main girder four carrying arms are arranged.

45. A machine as claimed in claim 44, wherein the lift means which are provided by which the carrying arms can be displaced in a direction of height are hydraulical means.

46. A machine for displacing building sections of parallelepiped configuration intended as part of a prefabricated building, the machine comprising: a frame including a longitudinal girder; four legs extending from said girder for supporting same, two of said legs proximate the forward portion of said girder and the other two proximate the after portion of said girder, ground engaging wheels mounted at the base of each said leg; a plurality of carrying arms hingedly connected to said girder and at least two of said arms depending on both sides thereof for carrying a building section, said legs and said arms adapted to straddle the section, said arms having generally the configuration of an inverted ''''L,'''' means for moving each arm relative to said girder connected thereto; engagement means connected to the base of each said arm adapted to engage the section for lifting same; responsive means included in each engagement means for signalling when it properly engages the section; and lift means associated with said girders for causing same to move vertically relative said ground engaging wheels whereby said carrying arms depending from said girder are enabled to be raised and lowered together and selectively to engage the section by movement caused by said means for moving each arm with said responsive means signalling the machine''s operator when each arm''s engagement means is in proper engagement for lifting the section.