DE202014001886U1 - Demountable and displaceable small crane for use on construction sites - Google Patents

Abstract

Dismountable and relocatable small crane (1) for use on construction sites with a mast (3) with an arm (4) that can be fastened in a frame-shaped underframe (2), the underframe having swivel castors (6) at each corner (5) and the arm ( 4) is releasably mounted at the upper end of the mast, with a receptacle (25) for counterweights on the side opposite to the boom (4), characterized in that in the area of the front narrow side (7) of the underframe (2) designed as a flat tubular profile frame the mast (3) is mounted in the center on a cross member (9), the boom (4) to the mast (3) and the underframe (2) extending outwards at a fixed predetermined angle, that in addition to an outer cross member (100) at the other end of the underframe (2) an additional cross member (10) is placed at a distance from its rear narrow side (8), with at least one mast support (11) between this further spaced cross member (10) and the rear side of the mast I extends up to this and a swiveling cable winch seesaw, designed as a receptacle (25) for the counterweights carrying U-shaped bearing frame (12) with two lateral bearing arms (13, 14) on the spaced additional cross member (10) each with these in one Swivel joint (15, 16) is pivotably mounted, and that a pull rope drum (18) for winding and unwinding a pull rope (17) of the crane (1) with the drive of a motor (19) is placed on the bearing frame as a cable winch and above the The pull cable drum (18) or the drum drive has a stop lever (20) which switches off this or its motor (19) and is mounted in a swivel joint (21), which is used as overload protection with a reset bracket (22) in the form of a wire cable (23) or a chain is braced against the rear outer cross member (100) or adjacent area of the underframe (2) according to a predetermined length and in the event of an overload on the pull rope (17) the pulling cable drum (18) acting greater force from the plane of the underframe or from a parallel plane to it with the bearing frame (12) designed as a cable winch rocker can be pivoted upwards, whereby the stop lever (20) due to the holder opposite the outer cross member (100) at the same time can be pivoted in the opposite direction against a switch (24) placed in the switching area and thus switches off the motor (19) or drive of the pulling cable drum (18).

Description

The present innovation relates to a demountable and displaceable small crane for use on construction sites with attachable in a frame-shaped base mast with boom for a rope or chain hoist with hooks, the base frame laterally at each corner has castors, and wherein the boom at the top of the mast releasably mounted, with a receptacle for counterweights on the opposite side to the boom.

Such a small crane is according to the EP 0 517 997 B1 known. To build the crane, it is necessary to insert the mast in a receiving tube, which together with arranged on him support legs, which have on their underside casters, form a base. The mast is held by two support struts and has a tubular receptacle into which the inner end of a receiving arm is inserted, at the outer end of a plate-shaped Aufnehmung a counterweight is suspended.

The construction of the crane can be done easily without support by a third party crane or mobile crane or the like on a construction site, since all individual parts of the crane with a lifting capacity of 300 kg at the 5 meter long jib tip are lighter than 80 kg.

A disadvantage of this small crane, however, is that the boom is structurally complex, which is relatively long with 5 meters and thus has a movable load-carrying device in its longitudinal direction and on its opposite side a device for receiving a counterweight from a firmly connected to the mast Pick-up arm which is connected via a guying device to the boom and at the outer end of the counterweight is attached.

It is insofar given a complex mechanical design to set at a given counterweight whose weight becoming effective according to a changing load of the crane, so that the crane does not tilt. There is no actual overload protection given that automatically switches off the drive of the winch of the pull rope with the load hook as soon as the load to be lifted is too heavy. It must be done in this known crane insofar continue to turn on and off the operation by the operator himself.

Furthermore, it is disadvantageous that the length of the boom with z. B. 5 meters is significantly larger than the height of the mast, wherein on the boom a longitudinally movable load bearing in the form of a trolley is arranged. In this respect, considerable forces are already acting on the mast at a relatively low load. In this respect, high counterweights are necessary to avoid tilting the crane.

Starting from a small crane according to the EP 0 517 997 B1 The purpose of the present innovation is the formation of a small crane according to the type mentioned in the introduction that the construction of the small crane from structurally simpler lighter items is carried out, which are far easier to transport and assemble in construction sites in rough buildings. In this case, the small crane in particular should be structurally simpler to store with simple means the counterweights, which should prevent tilting of the crane, with an additional purely mechanical, releasable with great certainty overload protection for automatically switching off the winch motor of the cable and thus for safe lifting given to be transported loads.

To solve this problem, a small crane according to claim 1 is provided.

The Kleinkran case has a subframe formed from bare profile beams, which z. B. can be formed as a rectangular support with a large contact surface. In contrast to four support feet according to the EP 0 517 997 B1 So far a high stability of the crane is achieved. The underframe is formed from a flat frame made of profile tubes, which are screwed together and wherein on a front cross member in the middle of the mast of the crane is releasably mounted. The outgoing from the top of the mast boom is, as well as the mast itself, not rotatable, but arranged in a fixed predetermined angle to the base.

About an additional cross member at a distance from the rear narrow side of the undercarriage or a running approximately from the middle of the two lateral side members cross member on the one hand, the mast is supported on a diagonal support supported there on the rear of the mast, on the other hand via this additional central cross member, the storage of a swivel cable winch, on which recordings for the counterweights of the crane are created. The winch rocker is formed from a U-shaped bearing frame with two lateral bearing arms, which are each mounted pivotably on the additional central cross member via pivot joints. At the same time, the cable winch jack carries the cable drum for the cable pull of the load hook and its winch motor.

The overload protection is given in the simplest way insofar as on the cable winch itself a stop lever to turn off the Winding motor is applied, which is biased by a simple return holder in the form of a wire rope or chain hoist relative to the rear cross member of the undercarriage.

In an acting due to an overload on the traction cable of the drum larger force designed as a cable winch U-shaped bearing frame is pivoted upwards, but the stop lever is pulled opposite due to the bias of the return bracket by means of wire rope down. The stop lever acts on an off switch of the winch motor, thus no further lifting of the load takes place.

It is insofar given a simple purely mechanical overload protection of the small crane according to claim 1, which offers the highest safety on construction sites when operating the small crane. At the same time via the designed as a cable winch U-shaped bearing frame, the storage of the counterweights and that at the outer rear end of the crane, ie on the opposite side to the boom. In this respect, large moments of force of the counterweights act on the back of the small crane. The counterweights can be chosen so that they can be pulled up to the construction site in the desired height of the building shell via an outer balcony or a window opening on the built-up small crane without initially provided counterweights.

Advantageous embodiment of the small crane according to claim 1 result from the dependent claims 2-12.

According to claim 2, the underframe of the crane is made of a flat profile tube frame in rectangular elongated shape and has two outer lateral side members and three perpendicular thereto cross member.

According to claim 3, 4 and 5, the bearing of the counterweights in the region of the free ends of the two U-shaped pivotable bearing frame forming bearing arms takes place, which can serve as receptacles of the counterweights indentations or elongated vertically projecting rods. The design of the overload protection results according to the dependent claims 6, 7 and 8. Essential for the construction of the small crane from structurally simple and lightweight items are the formation of the small crane according to claims 9-12.

• 1. Der zerlegbare Kleinkran ist aus wenigen Bauteilen zusammengesetzt, er ist zerlegbar und mit seinen Einzelteilen auf die jeweilige Baustelle in einem Haus bringbar und schnell zum Kleinkran zusammensetzbar;
• 2. Der Mast des Kleinkranes ist in der Höhe verstellbar, wobei dieser zweiteilig ist und dessen oberes Profilträgerstück im unteren Profilträgerstück eingesetzt und in der Höhe ausfahrbar ist, so dass die Höhe des Mastes verstellbar und auf die gängigen Raumhöhen im Wohnungsbau einstellbar ist; Der Auslegerarm des Krans ist unmittelbar seitlich außen am Mast des Kranes angelegt und in der Länge relativ kurz, so dass sich ergebene Drehmomente der zu befördernden Last, welche auf den Mast wirken, begrenzt sind. Somit ist lediglich eine geringes Gegengewicht am Ende des Lagerrahmens des Kranes anzubringen ist, so dass der Kran nicht kippt.
• 3. Die Profilträgerstücke des Mastes sind untereinander festlegbar, wobei Bolzen in unterschiedlicher Höhe in fluchtenden Bohrungen des inneren und äußeren Profilsträgerstückes einbringbar sind;
• 4. Zur Vereinfachung des Kranaufbaus weist dieser lediglich einen einzigen Seilzug zum Anheben der Last auf;
• 5. Die Überlastsicherung mit aufbringbaren Gegengewichten zur Last ist nicht unmittelbar über einen Aufnahmearm gemäß dem EP 0 517 997 am Mast angebracht, sondern seitlich außen an einem als Wippe verschwenkbaren unteren Lagerrahmen des Kranes, wobei an einem zusätzlichen Querträger seitlich außen gegenüberliegend der Mast mittig befestigt ist. Die verschwenkbare Wippe trägt den Windenmotor und die Seilwinde;
• 6. Der Windenmotor mit Seilwinde ist auf der verschwenkbaren Wippe gelagert und das Gegengewicht dort ummittelbar am äußeren Ende des Lagerrahmens der Wippe befestigt. Bei Belastung des Seilzuges schwenkt die Wippe nach oben, da der Rahmen der Wippe an einem mittig angeordneten Querträger des Trägerrahmens des Untergestells verschwenkbar gelagert ist und der Seilzug auf die Seilwinde wirkt. Der Querträger ist insofern nach innen vom äußeren Ende des Untergestells versetzt angeordnet und trägt die verschwenkbaren Lagerarme der Wippe. Sobald die Last zu schwer ist, verschwenkt die Wippe mit dem Windenmotor nach oben, wobei ein oberhalb des Motors bzw. der Seilwinde angeordneter Stopphebel ebenfalls mit dem Motor nach oben verschwenkt wird und eine am Stopphebel eingehängte Kette, welche gegenüber dem Untergestell mit ihrem anderen Ende festgelegt ist, gespannt wird, so dass der Stopphebel leicht nach unten geschwenkt und somit der Motor ausgestellt wird;
• 7. Es werden übliche Windenmotore mit Stopphebel, wie in Baumärkten angeboten, verwendet. Der Stopphebel dient an sich dazu den Gewindemotor anzuhalten, sobald die am Zugseil nach oben geförderte Last zu nah an das obere Ende des Auslegers gelangt;
• 8. Es werden 2–4 Gegengewichte von jeweils 15 Kg verwendet, welche als solche leicht einzeln an die jeweilige Baustelle im Haus mit dem aus seinen bloßen Einzelteilen aufgebauten Kran hebbar bzw. transportierbar sind. Insgesamt wirken als Gegengewicht somit 30 bis 60 oder 70 Kg.
• 9. Die Gegengewichte sind relativ leicht (15 Kg), so dass Sie mit dem aufgebauten Kleinkran an einem vorstehenden Balkon oder dgl. hochziehbar sind, ohne dass der Kran, welcher noch kein Gegengewicht aufweist, kippt;
• 10. Der Kleinkran kann zur Beförderung von Lasten in Höhen von 15 m bis 30 m je nach vorhandener Zugseillänge verwendet werden; Die Neuerung wird im Folgenden unter Bezug auf die beigefügten Zeichnungen einer bevorzugten Ausführungsform des zerlegbaren Kleinkrans zum Einsatz auf Baustellen näher erläutert, wobei das Zugseil des an seinem senkrechten Mast einen Ausleger mit Seilzug zum Anheben einer Last aufweisenden Krans über eine Zugseiltrommel auf- und abwindbar ist und eine mechanische Überlastsicherung aufweist, welche bei zu starker Kraft auf das Zugseil den Motorantrieb der Zugseiltrommel ausschaltet. Dies erfolgt dabei über eine speziell ausgebildete Seilwindenwippe, welche auf einem verschwenkbaren U-förmigen Lagerrahmen angelegt ist, der gegenüber dem Untergestell des Kleinkranes verschwenkbar ist.

In summary, in particular, significant advantages over the small crane according to the EP 0 517 997 B1 insofar as

• 1. The demountable small crane is composed of few components, it can be dismantled and brought with its individual parts to the respective site in a house and quickly assembled to Kleinkran;
• 2. The mast of the small crane is adjustable in height, this is in two parts and its upper profile carrier piece used in the lower profile carrier piece and extendable in height, so that the height of the mast is adjustable and adjustable to the usual room heights in housing construction; The boom of the crane is applied immediately laterally on the outside of the mast of the crane and relatively short in length, so that resulting torques of the load to be carried, which act on the mast, are limited. Thus, only a small counterweight at the end of the bearing frame of the crane is to install, so that the crane does not tip over.
• 3. The profile carrier pieces of the mast are mutually fixed, with bolts in different heights in aligned holes of the inner and outer profile carrier piece can be introduced;
• 4. For ease of crane construction, this has only a single cable to lift the load;
• 5. The overload protection with attachable counterweights to the load is not directly via a pickup arm according to the EP 0 517 997 attached to the mast, but laterally on the outside of a pivotable as a rocker lower bearing frame of the crane, wherein on an additional cross member laterally outboard opposite the mast is mounted centrally. The swiveling rocker carries the winch motor and the winch;
• 6. The winch motor with winch is mounted on the pivotable rocker and the counterweight there ummittelbar attached to the outer end of the bearing frame of the rocker. When loading the cable, the rocker pivots upwards, since the frame of the rocker is pivotally mounted on a centrally arranged cross member of the support frame of the undercarriage and the cable acts on the winch. The cross member is arranged so far inwardly offset from the outer end of the undercarriage and carries the pivotable bearing arms of the rocker. As soon as the load is too heavy, the rocker pivots upward with the winch motor, whereby a stop lever arranged above the motor or winch is likewise pivoted upwards with the motor and a chain suspended from the stop lever, which is opposite the undercarriage is tensioned with its other end, so that the stop lever is slightly tilted down and thus the engine is issued;
• 7. There are common winch motors with stop lever, as offered in hardware stores used. The stop lever itself serves to stop the thread motor as soon as the load conveyed up on the pull rope gets too close to the upper end of the boom;
• 8. 2-4 counterweights of 15 kg each are used, which are individually liftable or transportable individually to the respective construction site in the house with the crane constructed from its individual components. Altogether counter balance thus 30 to 60 or 70 kg.
• 9. The counterweights are relatively light (15 kg), so that you can be pulled up with the built-on small crane on a protruding balcony or the like, without the crane, which has no counterweight tilts;
• 10. The small crane may be used to carry loads at heights of 15 m to 30 m, depending on the length of the tow rope; The innovation will be explained in more detail below with reference to the accompanying drawings of a preferred embodiment of the demountable small crane for use on construction sites, the traction cable on his vertical mast a boom with cable for lifting a load having crane on a traction cable drum is up and down and has a mechanical overload protection, which switches off the motor drive of the traction cable drum at excessive force on the pull rope. This is done via a specially trained winch rocker, which is applied to a pivotable U-shaped bearing frame, which is pivotable relative to the lower frame of the small crane.

Show it:

1 A perspective view of the small crane seen on the front and the adjacent left longitudinal side;

2 Another perspective view of the small crane now seen on the back of the small crane, on which the trained as winch rocker U-shaped bearing frame of the crane relative to the base frame is pivotally mounted, in the background, the back of the mast and boom of the crane can be seen;

3 An enlarged view of a section of the back of the crane according to 2 , Seen on the undercarriage and there via two lateral bearing arms on a cross member pivotally mounted U-shaped bearing frame, which is formed with traction drum and motor drive and overload protection with a restoring support of a wire rope, which is pivotally mounted relative to a in a pivot joint on the winch rocker Stop lever and the undercarriage is braced and is adjusted at a self-adjusting overload against the movement of the cable winch rocker down on this against a motor switch.

In the perspective view of the small crane ( 1 ) can be seen in 1 the representation of the front and the adjacent left-hand longitudinal side of the crane consisting of a subframe ( 2 ), which consists of profile carriers ( 9 . 10 . 11 ; 26 . 27 ) is formed in the form of a rectangle, is constructed and from one on the front narrow side ( 7 ) of the undercarriage to a front cross member ( 9 ) centrally arranged mast ( 3 ) with a cantilever arm extending from the mast top ( 4 ). Furthermore, from a pivotally mounted cable winch, which at the rear part of the undercarriage ( 2 ) and from a U-shaped pivotable bearing frame ( 12 ) consists. The underframe is formed from flat profile tube frame, namely from cross members ( 9 . 10 . 11 ) as well as lateral side members ( 26 . 27 ), which are screwed together, these items are so far easy to be brought to the building respectively provided job. A mobility of the crane is due to the arrangement of steering tubes ( 6 ) at the individual 4 corners of the undercarriage ( 2 ).

The extension arm of the jib ( 4 ) is like the mast ( 3 ) itself not rotatable, but in a fixed predetermined angle relative to the base ( 2 ) arranged.

Via an additional crossbeam ( 10 ), approximately in the middle between the front cross member ( 9 ) and the rear outer cross member ( 100 ), on the one hand the mast ( 3 ) is fixedly mounted on the back of the mast via a suitable oblique support, on the other hand via this additional central cross member ( 10 ) the mounting of a pivotable cable winch rocker ( 12 . 18 . 19 ), on which pictures ( 25 ) are applied for the counterweights of the crane.

The cable winch is made of a U-shaped bearing frame ( 12 ) with 2 lateral bearing arms ( 13 . 14 ), which in each case at the additional central cross member ( 10 ) via swivel joints ( 15 . 16 ) are pivotally mounted. The cable winch ( 12 . 18 . 19 ) simultaneously carries the cable drum ( 18 ) for the cable pull or for the pull rope ( 17 ) with load hook and its winch motor ( 19 ).

An overload protection is given in the simplest way insofar as on the cable winch or the cable drum ( 18 ) a stop lever ( 20 ) for switching off the winch motor ( 19 ), which has a simple return holder ( 22 ) in the form of a wire rope ( 23 ) or chain relative to the outer rear cross member ( 100 ) of the undercarriage is biased.

In the event of an overload on the traction cable ( 17 ) of the drum ( 18 ) acting larger force is designed as a cable winch U-shaped bearing frame ( 12 ) is pivoted upward, wherein the stop lever ( 20 ) but due to the bias by reset bracket ( 22 ) is pulled by wire rope opposite to the bottom. The stop lever acts on a switch ( 24 ) of the winch motor ( 19 ), thus no further lifting of the load takes place.

In addition to the mechanical overload protection takes place at the same time on the designed as a cable winch U-shaped bearing frame ( 12 ) the storage of the counterweights at the outer rear end of the crane, where there for these weights recordings ( 25 ) are created. The counterweights are in 1 . 2 shown as usual 10 kg weights.

The further perspective view of the small crane ( 1 ) according to 2 , now seen on the back of the small crane, or directly on the rear narrow side ( 8th ) of the undercarriage with the arranged there 2 counterweight pieces, as well as on the opposite longitudinal side of the crane corresponds to the illustration according to 1 ,

It is particularly clear now the cable winch ( 12 . 18 . 19 ), which from the U-shaped bearing frame ( 12 ), the cable drum ( 18 ) and the winch motor ( 19 ), wherein the U-shaped bearing frame ( 12 ) via its two lateral bearing arms ( 13 . 14 ) or swivel joints ( 15 . 16 ) at the central cross member ( 10 ) is pivotally mounted. It's like in 1 clarifies the system of the stop lever ( 20 ) above the cable drum ( 18 ), wherein this lever in a pivot joint ( 21 ) and via the wire rope ( 23 ) relative to the subframe ( 2 ) is braced.

Offset to the pivotally mounted U-shaped bearing frame ( 12 ) is in the background of the undercarriage ( 2 ) on the front narrow side ( 7 ) of the crane at the local crossbeam ( 9 ) centrally mounted mast ( 3 ) of the crane as well as the arm of its boom ( 4 ).

An enlarged view of a section of the back of the crane is in 3 reproduced, seen directly in the direction of the subframe ( 2 ) and the two lateral bearing arms ( 13 . 14 ) of the U-shaped bearing frame ( 12 ), which on the cross member ( 10 ) via swivel joints ( 15 . 16 ) on the cross member ( 10 ) are pivotally mounted. It is clearly the traction cable drum ( 18 ) and the motor drive ( 19 ) and the structure of the overload protection from a restoring holder ( 22 ), a wire rope ( 23 ), which between the in a swivel joint ( 21 ) on the rope rocker or laterally of the cable drum ( 18 ) pivotally mounted stop lever ( 20 ) and the underframe ( 2 ) is braced. In this respect, in a self-adjusting overload against the movement of the winch rocker stop lever ( 20 ) down against the motor switch ( 24 ) pivoted and thus the engine off.

LIST OF REFERENCE NUMBERS

1

small crane

2

undercarriage

3

mast

4

boom

5

Base-corners

6

castors

7

front narrow side of the undercarriage

8th

rear narrow side of the undercarriage

9

front cross member

10

spaced cross member

11

mast support

12

U-shaped bearing frame (cable winch)

13, 14

Bearing arms of the bearing frame

15, 16

Swivel joints of the bearing arms

17

Traction rope of the crane

18

Traction rope drum (winch)

19

engine

20

stop lever

21

pivot

22

Restoring bracket

23

Wire rope

24

Switch off the engine

25

Shooting for the counterweights

26, 27

longitudinal beams

28

central pipe section of the bearing frame ( 12 )

29, 30

protruding end sections

31

guide plate

100

outer cross member

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0517997 B1 [0002, 0007, 0009, 0017]
• EP 0517997 [0017]

Claims (12)

Demountable and displaceable small crane ( 1 ) for use on construction sites with in a frame-shaped base ( 2 ) attachable mast ( 3 ) with boom ( 4 ), with the underframe laterally at each corner ( 5 ) Castors ( 6 ) and wherein the boom ( 4 ) is detachably mounted at the upper end of the mast, with a receptacle ( 25 ) for counterweights at the boom ( 4 ) opposite side, characterized in that in the region of the front narrow side ( 7 ) formed as a flat profile tube frame underframe ( 2 ) on a cross member ( 9 ) in the middle of the mast ( 3 ), wherein the boom ( 4 ) to the mast ( 3 ) and the underframe ( 2 ) extends at a fixed predetermined angle to the outside, that in addition to an outer cross member ( 100 ) at the other end of the subframe ( 2 ) an additional cross member ( 10 ) at a distance from the rear narrow side ( 8th ), wherein at least one mast support ( 11 ) between this further spaced cross member ( 10 ) and the rear of the mast extending up to this and trained as a pivotable cable winch rockers, recordings ( 25 ) for the counterweights bearing U-shaped bearing frame ( 12 ) with two lateral bearing arms ( 13 . 14 ) on the spaced additional cross member ( 10 ) each with these in a rotary joint ( 15 . 16 ) is mounted pivotably, and that on the bearing frame as a winch a traction drum ( 18 ) for winding and unwinding a pull rope ( 17 ) of the crane ( 1 ) with the drive of an engine ( 19 ) and above the cable drum ( 18 ) or the drum drive a this or their motor ( 19 ) ausschaltender, in a swivel joint ( 21 ) mounted stop lever ( 20 ), which as overload protection with a restoring holder ( 22 ) in the form of a wire rope ( 23 ) or a chain relative to the rear outer cross member ( 100 ) or adjacent area of the undercarriage ( 2 ) is braced according to a predetermined length and at a due to an overload on the traction cable ( 17 ) of the cable drum ( 18 ) acting greater force from the plane of the subframe or from a parallel plane with the designed as a cable winch bearing frame ( 12 ) is pivotable upward, wherein the stop lever ( 20 ) due to the holder relative to the outer cross member ( 100 ) at the same time opposite to a circuit breaker applied in the switching area ( 24 ) is pivotable and thus the engine ( 19 ) or drive of the cable drum ( 18 ) turns off. Small crane according to claim 1, characterized in that the lower frame formed by a flat profile tube frame ( 2 ) is rectangular in elongated shape and consists of two outer lateral side members ( 26 . 27 ) and the perpendicular cross beams ( 9 . 10 . 100 ) consists. Small crane according to claim 1 or 2, characterized in that for the storage of the counterweights in the region at the outer free end of the bearing arms ( 13 . 14 ) the recordings ( 25 ) are created for the counterweights. Small crane according to claim 3, characterized in that the U-shaped bearing frame ( 12 ) from the two outer bearing arms ( 13 . 14 ) and one of these at the free end connecting pipe section ( 28 ), on its upper side in laterally projecting end sections ( 29 . 30 ) the recordings ( 25 ) are created for the counterweights with brackets for this. Small crane according to claim 4, characterized in that with the formation of the holder for receiving bores having counterweights the pipe section ( 28 ) with the laterally projecting end sections ( 29 . 30 ) is formed of a flat square tube, on the top of holding mandrels are created in the form of elongated rods. Small crane according to claim 5, characterized in that the formed as a cable winch rocker, U-shaped bearing frame ( 12 ) with the inside bearing arm ( 13 ) and the end portion of the tube connecting the bearing frame ( 28 ) over the middle of the width of the subframe ( 2 ), wherein the bearing of the engine ( 19 ) and the cable drum ( 18 ) is carried out in such a way that the traction cable drum ( 18 ), in the central area of the undercarriage ( 2 ) to play and play the cable ( 17 ) of the crane, which runs from a pulley on the upper boom of the mast, and also the engine ( 19 ) not laterally over the subframe ( 2 ) or via the lateral side members ( 26 . 27 ) survives. Small crane according to claim 6, characterized in that the traction cable drum ( 18 ) and the engine ( 19 ) are created on a common axis of rotation as a unit. Small crane according to claim 6 or 7, characterized in that at least over the length of the region of the cable drum a bevelled guide plate ( 31 ) to the outer side of the bearing frame ( 12 ) on the central pipe section ( 28 ) or an additional cross member between the lateral bearing arms ( 13 . 14 ) having. Small crane according to one or more of claims 1 to 8, characterized in that the mast ( 3 ) is characterized in two parts and consists of two profile longitudinal pieces which are plugged and fastened to each other. Small crane according to claim 9, characterized in that the upper profile longitudinal piece in the lower profile longitudinal piece can be inserted and fixed extendable at different heights. Small crane according to one or more of claims 1 to 10, characterized in that the cantilever arm has a length of 50 cm. Small crane according to one or more of claims 1 to 11, characterized in that the Kleinkran the recordings ( 25 ) for the counterweights on the U-shaped bearing frame ( 12 ), wherein 2-4 counterweights of 10-15 kg are provided (total counterweight thus 30-60 kg)

Images