Patent Description:
It is also an object of the present invention to provide a base for the installation of the above-mentioned crane on corresponding target surfaces of building structures or similar supporting structures.

Also an object of the present invention is a method of assembling and installing a crane for confined spaces on corresponding target surfaces of building structures or similar supporting structures.

The object of the present invention is in the industrial field of equipment for lifting, handling and lowering loads in confined spaces, such as special recovery and rescue cranes that are used in confined spaces, such as tanks, silos, sewage pipes, shafts, manholes, culverts and/or the like.

It is well known that there are different types of cranes or similar lifting arms designed for lifting, handling and lowering loads in confined spaces.

Generally, such cranes comprise a support post of elongated shape extending along a prevailing direction with a first end designed to attach the crane to a target surface of a building structure or similar support structure and a second end, facing away therefrom, designed to support a respective lifting arm, which may also be telescopic.

The lifting arm is fixed in relation to the support frame and its inclination in relation to the latter is determined during the design phase or during assembly.

Depending on the model and type of crane used, the lifting arm can be cantilevered on one side of the support post only or on both sides of the post.

Depending on the case, the lift arm is almost always supported and reinforced by an oblique support rod that connects a portion of the support post away from the corresponding second end to a portion of the lift arm that may also coincide with one of its ends.

These cranes are also equipped with corresponding lifting devices that are appropriately mounted on the support post or lifting arm.

The lifting devices fitted to such cranes comprise normally one or more hoisting mechanisms, such as a winch or other similar pull-back mechanism, equipped with a special drum on which a lifting cable is wound, the end portion of which runs along the lifting arm around at least one idler pulley located on the end of the lifting arm and from which it hangs vertically, terminating in a corresponding engagement hook. Activation of the lifting device in one direction or the other causes the engagement hook to be raised or lowered and, consequently, any load associated with it.

In order to enable the installation of the aforementioned cranes on corresponding horizontal target surfaces of building structures or similar supporting structures, it is known to provide support masts whose first end is shaped and configured in such a way as to allow it to be firmly bolted or screwed to the respective building structure or similar supporting structure.

An example of such a crane is shown and described in <CIT> in which the first end of the support post has an attachment flange fitted with an attachment plate that is clamped against the horizontal target surface of the corresponding building structure or similar supporting structure by means of a plurality of threaded fasteners suitably screwed and cooperating with corresponding locking nuts.

Confined space cranes such as the one described in <CIT> have objective limitations in terms of adaptability and flexibility of use with respect to the different types of target surfaces that may be encountered during installation and deployment.

In fact, in order to allow the installation of the same crane on different types of target surfaces, such as horizontal surfaces and/or vertical surfaces, the support post is generally manufactured in such a way as to present a first end with a cylindrical shape suitable for coupling to corresponding engagement housings, also with cylindrical shapes, manufactured on different types of installation bases, some configured for installations on horizontal target surfaces and others configured for installations on vertical target surfaces.

Going into detail, the installation bases configured for horizontal target surfaces are provided with a flat fixing plate from which a cylindrical body develops orthogonally, defining within it the cylindrical engagement seat designed to receive the first cylindrical end of the crane support post in coupling. The fixing plate can be bolted or screwed to the horizontal target surface, whereby the crane support post, the first end of which is inserted into the engagement seat of the installation base and locked therein by means of a special locking element, develops vertically from the fixing plate.

Installation bases configured for vertical target surfaces also have a flat fixing plate to which a cylindrical body is engaged. Unlike installation bases for horizontal target surfaces, the cylindrical body is not perpendicular to the fixing plate, but develops longitudinally parallel to it to provide a vertical engagement seat parallel to the vertical target surface of the respective building structure or the similar supporting structure.

An example of the solution just described can be found in document <CIT> which provides for the crane to be coupled to different types of installation bases, each of which is dedicated to a particular and specific target area of a corresponding building structure or similar support structure. However, this solution has certain disadvantages which will be listed and discussed below.

First of all, the need for two or more installation bases to give the crane the flexibility to be installed on both a horizontal and a vertical target surface has a significant impact on the overall production and marketing costs of such cranes.

In addition, the presence of multiple components inevitably requires the manufacturer/seller as well the owner of such cranes to have extensive storage and warehousing facilities.

Last but not least, the use of different installation bases to be used in combination with the cranes to be installed further complicates the transport and installation operations, as the number of components to be handled and managed is significant.

Also known from documents <CIT>, <CIT> and <CIT> are other confined space crane solutions using traditional bases or support plates.

In detail, document <CIT> discloses the features of the preamble of independent claims <NUM> and <NUM>, and it describes a confined space crane comprising an elongated vertical post having at least one annular tube and a boom hinged to an upper portion of the post. There is also provided a base or installation plate provided with a flat support portion having a square shape from which a housing bushing vertically and centrally develops to vertically accommodate the crane post. A plurality of reinforcing flaps are arranged between the flat support portion and the housing bush.

Document <CIT> concerns a transportable crane comprising a post, an arm that can be attached to the upper end of the post, and a diagonal rod that connects the arm to the post. Again there is an installation base or plate. The base has a flat, circular support portion from which a housing bushing receives the crane post vertically and centrally. A plurality of reinforcing flaps are arranged between the flat support portion and the housing bushing.

Document <CIT> refers to a support base for a crane with a substantially box-like shape, which includes a housing for the vertical engagement of the crane mast. The support base can be bolted to various types of installation plates.

The aim of the present invention is therefore to substantially solve at least one of the drawbacks and/or limitations found in known solutions.

An object of the invention is to provide a confined space crane and a base for its installation that is easy and simple to install regardless of the intended target area.

An object of the present invention is to make the confined space crane suitable for installation on a target surface of a building structure or similar horizontal or vertical support structure without the need for specifically dedicated installation bases.

A further object of the present invention is to reduce the overall production and/or marketing costs of such cranes.

A further aim of the present invention is to reduce the volumes required for the storage of cranes and their accessories in the relevant warehouses.

It is also an object of the present invention to simplify and improve the transport, assembly and installation of such cranes.

Aspects of the invention are described below.

In a <NUM>st independent aspect of the invention, a crane (<NUM>) is provided for confined spaces comprising:.

characterized by the fact that the installation base (<NUM>) additionally includes at least one auxiliary engagement seat (<NUM>) arranged to receive in engagement the support post (<NUM>) which develops transversely, optionally perpendicularly, with respect to the engagement seat (<NUM>), the first end (5a) of the support post (<NUM>) of the crane (<NUM>) being coupled to the engagement seat (<NUM>) or to the auxiliary engagement seat (<NUM>) depending on the orientation of the target surface.

In a further independent aspect, there is provided an installation base (<NUM>) for a crane (<NUM>) for confined spaces, comprising at least one fixing portion (<NUM>) arranged to be fixed on a target surface of a building structure or a similar supporting structure and at least one engagement seat (<NUM>) developing predominantly transversely, preferably perpendicularly, with respect to a lying plane of the fixing portion (<NUM>) for receiving in engagement a first end (5a) of a support post (<NUM>) of a crane (<NUM>), characterized by further comprising at least one auxiliary engagement seat (<NUM>) developed transversely, optionally perpendicularly, with respect to the engagement seat (<NUM>) and also arranged to receive in engagement the first end (5a) of the support post (<NUM>) of the crane (<NUM>), the presence of the engagement seat (<NUM>) and the auxiliary engagement seat (<NUM>) allowing, by means of the fixing portion (<NUM>), the installation of the crane (<NUM>) on different target surfaces, in particular orthogonal, even more particularly on a horizontal target surface or on a vertical target surface. In the following aspects, details are added regarding both the crane (<NUM>) for confined spaces and the installation base (<NUM>) of that crane (<NUM>). Each individual aspect relating to the installation base (<NUM>) is also clearly combinable with any aspect relating to the crane (<NUM>) for confined spaces and vice versa.

In a <NUM>nd aspect in accordance with the <NUM>st aspect or the further aspect relating to the installation base (<NUM>), the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) predominantly runs substantially parallel to the lying plane of the fixing portion (<NUM>) of the base (<NUM>).

In a <NUM>rd aspect in accordance with the <NUM>st or <NUM>nd aspect or the further aspect relating to the installation base (<NUM>), the fixing portion (<NUM>) of the installation base (<NUM>) comprises at least two support plates (3a) separated from each other and each lying on the same lying plane as the fixing portion (<NUM>).

In a <NUM>th aspect in accordance with the preceding aspect, each support plate (3a) of the fixing portion (<NUM>) is provided with at least one through opening (3b) arranged to receive in engagement at least one bolt or similar threaded fastening element to the target surface of the building structure or similar support structure.

In a <NUM>th aspect according to any one of the two preceding aspects, each support plate (3a) of the fixing portion (<NUM>) is provided with two through openings (3b) arranged on opposite sides of the respective support plate (3a), each through opening (3b) being arranged to receive in engagement at least one bolt or similar threaded element for fastening to the target surface of the respective building structure or the similar supporting structure.

In a <NUM>th aspect in accordance with any one of the preceding two aspects, each through opening (3b) of each support plate (3a) of the fixing portion (<NUM>) has a substantially oval or elliptical shape to allow, during a crane installation operation (<NUM>) for confined spaces, the adjustment of the position of the installation base (<NUM>) along at least one direction parallel to the target surface of the respective building structure or the similar supporting structure.

In a <NUM>th aspect in accordance with the <NUM>th aspect, or the <NUM>th aspect when dependent on the <NUM>th aspect, each through opening (3b) of each support plate (3a) of the fixing portion (<NUM>) develops predominantly along a direction substantially orthogonal to the prevailing direction of development of the other through opening (3b) of the same support plate (3b) to allow, during a crane installation operation (<NUM>), adjustment of the position of the installation base (<NUM>) along two directions perpendicular to each other and parallel to the target surface of the respective building structure or the similar supporting structure.

In an <NUM>th aspect in accordance with any one of the preceding aspects, the engagement seat (<NUM>) of the installation base is defined, at least in part, by at least one first portion (4a), optionally cylindrical, made through a respective first central plate (2a) of the base (<NUM>), optionally the first central plate (2a) of the base (<NUM>) being substantially parallel to the plane of the lying plane of the fixing portion (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with the preceding aspect, the engagement seat (<NUM>) of the installation base (<NUM>) is defined, at least in part, by at least a second portion (4b), optionally cylindrical, respectively made through a respective second central plate (2b) of the installation base (<NUM>), optionally parallel to the first central plate (2a) of the installation base (<NUM>), in particular both central plates (2a, 2b) of the installation base (<NUM>) being substantially parallel to the lying plane of the engagement portion (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with the preceding aspect, the first central plate (2a) and the second central plate (2b) of the installation base (<NUM>) are spaced along the prevailing direction of development of the engagement seat (<NUM>) transversely, substantially perpendicular to the lying plane of the fixing portion (<NUM>) whereby the first portion (4a), optionally cylindrical, and the second portion (4b), optionally cylindrical, provide respective contact rings for the first end (5a) of the support post (<NUM>) of the crane (<NUM>) spaced apart from each other.

In an <NUM>th aspect in accordance with the <NUM>th aspect or the <NUM>th aspect, the first portion (4a) and the second portion (4b), which at least partially define the seat of engagement (<NUM>) of the installation base (<NUM>), are identical.

In a 12thaspect in accordance with any one of aspects <NUM> to <NUM>, the first portion (4a) and the second portion (4b) at least partially defining the engagement seat (<NUM>) of the installation base (<NUM>) are overlapped and aligned along a transverse direction, preferably substantially perpendicular, with respect to the plane of lay of the fixing portion (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with any one of the four preceding aspects, the engagement seat (<NUM>) of the installation base is defined, at least in part, by at least a third portion (4c), optionally cylindrical, respectively made through a respective third central plate (2c) of the installation base (<NUM>), optionally parallel to the first and second central plates (2a, 2b) of the installation base (<NUM>), in particular all of the central plates (2a, 2b, 2c) of the installation base (<NUM>) being substantially parallel to the lying plane of the fixing portion (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with the previous aspect, the third central plate (2a) and the second central plate (2b) of the installation base (<NUM>) are spaced along the prevailing direction of development of the transverse engagement seat (<NUM>), substantially perpendicular to the lying plane of the fixing portion (<NUM>) wherein the third portion (4c) and the second portion (4b) provide respective closed-form, optionally ringshaped contact elements, spaced apart from each other, for receiving in engagement the first end (5a) of the support post (<NUM>) of the crane (<NUM>).

In a <NUM>th aspect according to the <NUM>th aspect or the <NUM>th aspect, the portions (4a, 4b, 4c) defining at least partially the engagement seat (<NUM>) of the installation base (<NUM>) are identical.

In a <NUM>th aspect in accordance with any one of aspects <NUM>th to <NUM>th, the portions (4a, 4b, 4c) defining the engagement seat (<NUM>) of the installation base (<NUM>) are superimposed and aligned along a transverse direction, preferably substantially perpendicular, with respect to the plane of the engagement seat (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with any one of the preceding aspects, the auxiliary engagement seat (<NUM>) is defined at least in part by a tang (10a), optionally cylindrical, which develops predominantly perpendicular to the prevailing development of the engagement seat (<NUM>) of the installation base (<NUM>), optionally substantially parallel to lying plane of the fixing portion (<NUM>).

In an <NUM>th aspect in accordance with any one of the preceding aspects, the auxiliary engagement seat (<NUM>) is defined at least in part by two tangs (10a), optionally cylindrical, which develop predominantly perpendicular to the prevailing development of the engagement seat (<NUM>) of the installation base (<NUM>), optionally substantially parallel to lying plane of the fixing portion (<NUM>).

In a <NUM>th aspect in accordance with the previous aspect, the tangs (10a) defining the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) are specularly identical.

In a <NUM>th aspect in accordance with the <NUM>th or 19th aspect, the tangs (10a) are aligned along the prevailing direction of development.

In a <NUM>st aspect in accordance with any of the preceding aspects, the engagement seat (<NUM>) of the installation base (<NUM>) passes centrally through the auxiliary engagement seat (<NUM>).

In a <NUM>nd aspect in accordance with the preceding aspect when it depends on anyone of the <NUM>th to <NUM>th aspects, the engagement seat (<NUM>) of the installation base divides the auxiliary engagement seat (<NUM>) into the two tangs (10a).

In a <NUM>rd aspect in accordance with any one of the preceding aspects <NUM> to <NUM>, the auxiliary engagement seat (<NUM>) is defined at least in part by two tangs (10a), optionally cylindrical, which develop predominantly perpendicular to the prevailing development of the engagement seat (<NUM>) of the installation base (<NUM>), optionally substantially parallel with respect to lying plane of the fixing portion (<NUM>).

In a <NUM>th aspect in accordance with the 23rd or 24th aspect, the tangs (10a) are aligned along the prevailing direction of development.

In a <NUM>th aspect in accordance with any of the three previous aspects, the engagement seat (<NUM>) of the installation base (<NUM>) passes centrally through the auxiliary engagement seat (<NUM>).

In a <NUM>th aspect in accordance with any of the four previous aspects, the engagement seat (<NUM>) of the installation base (<NUM>) divides the auxiliary engagement seat (<NUM>) into the two tangs (10a).

In a <NUM>th aspect in accordance with anyone of the five preceding aspects, the tangs (10a) at least partially defining the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) are tangent to at least one of the central plates (2a, 2b) of the installation base (<NUM>), preferably they are tangent to the first central plate (2a) and the second central plate (2b) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with anyone of the six previous aspects, the tangs (10a) defining the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) are interposed between the first central plate (2a) and the second central plate (2b) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with anyone of the seven preceding aspects when the <NUM>rd aspect depends on anyone of the <NUM>th to <NUM>th aspects, the third central plate (2c) of the installation base (<NUM>) is interposed between the second central plate (2b) of the installation base (<NUM>) and the support plates (3a) of the fixing portion (<NUM>) of the latter.

In a <NUM>st aspect in accordance with anyone of aspects <NUM>th to <NUM>th or <NUM>th to <NUM>th, the installation base (<NUM>) comprises two walls (<NUM>) substantially orthogonal with respect to the lying plane of the fixing portion (<NUM>) and substantially parallel to each other, each wall (<NUM>) extending between the first central plate (2a) of the base (<NUM>) and the respective support plate (3a) of the fixing portion (<NUM>) to define a substantially box-like or parallelepiped volume in which the engagement seat (<NUM>) and the auxiliary engagement seat (<NUM>) are defined.

In a <NUM>nd aspect in accordance with the previous aspect, the tangs (10a) defining the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) are tangent to the walls (<NUM>) of the latter.

In a <NUM>rd aspect in accordance with any one of the preceding aspects, at least one coupling sleeve (<NUM>), optionally of cylindrical shape is interposable between at least one of the engagement seats (<NUM>, <NUM>) of the installation base (<NUM>) and the first end (5a) of the support post (<NUM>) of the crane (<NUM>), preferably to allow coupling of different support posts (<NUM>) having first ends (5a) of different sizes with at least one of the engagement seats (<NUM>, <NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with the preceding aspect, the coupling sleeve (<NUM>) comprises a first portion (12a), optionally cylindrical, insertable into at least one of the engagement seats (<NUM>, <NUM>) of the installation base (<NUM>), the first portion (12a) of the coupling sleeve (<NUM>) having at least one circular shoulder (12b) projecting transversely preferably perpendicularly, outwards from one end of the first portion (12a) itself so as to rest against a corresponding edge of the corresponding engagement seat (<NUM>, <NUM>) of the installation base <NUM>.

In a <NUM>th aspect in accordance with the preceding aspect, the coupling sleeve (<NUM>) comprises a second portion (12c), optionally cylindrical, which can be fitted on the first end (5a) of the support post (<NUM>) of the crane (<NUM>) and can be inserted into the first portion (12a) to ensure proper coupling between the crane (<NUM>) and the installation base (<NUM>), the first and second portions (12a, 12c), of the coupling sleeve (<NUM>) allowing the coupling of different support posts (<NUM>), having first ends (5a) of different sizes, with at least one of the engagement seats (<NUM>, <NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with anyone of the three preceding aspects, the first end (5a) of the support post (<NUM>) is arranged to engage at least one of the engagement seats (<NUM>, <NUM>) or the respective coupling sleeve (<NUM>) associated with it by interference.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (4a) of the engagement seat (<NUM>) of the installation base (<NUM>) has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (4a) and the second portion (4b) of the engagement seat (<NUM>) of the installation base (<NUM>) each has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (4a), the second portion (4b) and the third portion (4c) of the engagement seat (<NUM>) of the installation base (<NUM>) each has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>nd, the tang (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) has a substantially cylindrical profile.

In a <NUM>st aspect according to anyone of the aspects <NUM>th to <NUM>nd, each tang (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) has a substantially cylindrical profile.

In a <NUM>nd aspect according to anyone of the <NUM>rd to <NUM>th aspects, the coupling sleeve (<NUM>) has a substantially cylindrical profile.

In a <NUM>rd aspect according to anyone of the <NUM>th to <NUM>th aspects, the first portion (12a) of the coupling sleeve (<NUM>) has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the <NUM>th to <NUM>th aspects or the preceding aspect, the shoulder (12b) of the first portion (12a) of the coupling sleeve (<NUM>) is substantially circular.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the second portion (12c) of the coupling sleeve (<NUM>) has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the nine preceding aspects, the first end (5a) of the support post (<NUM>) of the crane (<NUM>) has a substantially cylindrical profile.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (4a) of the engagement seat (<NUM>) of the installation base (<NUM>) does not have a cylindrical profile, optionally the profile of the first portion (4a) of the engagement seat (<NUM>) of the installation base (<NUM>) is polygonal.

In a <NUM>th aspect according to anyone of aspects <NUM>th to <NUM>th, the first portion (4a) and the second portion (4b) of the installation base (<NUM>) each does not have a cylindrical profile, optionally the profile of each of the first portion (4a) and the second portion (4b) of the engagement seat (<NUM>) of the installation base (<NUM>) is polygonal.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (4a), the second portion (4b) and the third portion (4c) of the engagement seat (<NUM>) of the installation base (<NUM>) each does not have a cylindrical profile, optionally the profile of each of the first portion (4a), the second portion (4b) and the third portion (4c) of the engagement seat (<NUM>) of the installation base (<NUM>) is polygonal.

In a <NUM>th aspect according to anyone of the aspects <NUM>th to <NUM>nd, the tang (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) does not have a cylindrical profile, optionally the profile of the tang (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) is polygonal.

In a <NUM>st aspect according to anyone of the aspects <NUM>th to <NUM>nd, each tang (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) does not have a cylindrical profile, optionally the profile of each tang (10a) of the auxiliary engagement seat (<NUM>) is polygonal.

In a <NUM>nd aspect according to anyone of the <NUM>rd to <NUM>th aspects, the coupling sleeve (<NUM>) does not have a cylindrical profile, optionally the profile of the coupling sleeve (<NUM>) is polygonal.

In a <NUM>rd aspect according to anyone of the aspects <NUM>th to <NUM>th, the first portion (12a) of the coupling sleeve (<NUM>) does not have a cylindrical profile, optionally the profile of the first portion (12a) of the coupling sleeve (<NUM>) is polygonal.

In a <NUM>th aspect according to anyone of aspects <NUM>th to <NUM>th or the preceding aspect, the shoulder (12b) of the first portion (12a) of the coupling sleeve (<NUM>) is not circular, optionally the profile of the shoulder (12b) of the first portion (12a) of the coupling sleeve (<NUM>) has a polygonal profile, preferably the same profile as the first portion (12a) of the coupling sleeve (<NUM>).

In a <NUM>th aspect according to anyone of aspects <NUM>th to <NUM>th, the second portion (12c) of the coupling sleeve (<NUM>) does not have a cylindrical profile, optionally the profile of the second portion (12c) of the coupling sleeve (<NUM>) is polygonal.

In a <NUM>th aspect according to anyone of the nine preceding aspects, the first end (5a) of the support post (<NUM>) of the crane (<NUM>) does not have a cylindrical shape profile, optionally the profile of the first end (5a) of the support post (<NUM>) of the crane (<NUM>) is polygonal.

In a <NUM>th aspect according to the preceding aspect, the profile of the first end (5a) of the support post (<NUM>) of the crane (<NUM>) recalls the polygonal shape of the polygonal profile of the portions (4a, 4b, 4c) of the engagement seat (<NUM>) of the installation base (<NUM>) and/or of the tangs (10a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect according to anyone of the preceding two aspects, the profile of the first end (5a) of the support post (<NUM>) of the crane (<NUM>) is at least partially counter shaped to the polygonal shape of the portions (4a, 4b, 4c) of the engagement seat (<NUM>) of the installation base (<NUM>) and/or of the tangs (<NUM>0a) of the auxiliary engagement seat (<NUM>) of the installation base (<NUM>).

In a <NUM>th aspect in accordance with anyone of the preceding aspects, the support post and/or the lifting arm (<NUM>) of the crane (<NUM>) has/present a profile, in cross-section, substantially octagonal.

In a <NUM>th aspect in accordance with anyone of the preceding aspects, the lifting arm (<NUM>) of the crane (<NUM>) can be extended and shortened.

In a <NUM>st aspect in accordance with anyone of the preceding aspects, the lifting arm (<NUM>) of the crane (<NUM>) is telescopic.

In an independent <NUM>nd aspect, there is a method for assembling and installing a crane (<NUM>) for confined spaces that includes:.

In a <NUM>rd aspect dependent on the previous aspect, the step of engaging the first end (5a) of the support post (<NUM>) of the crane (<NUM>) in one of the engagement seats (<NUM>, <NUM>) of the installation base (<NUM>) of the crane (<NUM>) is performed either by inserting the first end (5a) of the support post (<NUM>) of the crane (<NUM>) into the engagement seat (<NUM>) which is substantially perpendicular to the plane of the laying plane of the fixing portion (<NUM>) of the base (<NUM>) when the target surface of the building structure or the similar supporting structure is substantially horizontal, or by inserting the first end (5a) of the crane support post (<NUM>) of the crane (<NUM>) into the auxiliary engagement seat (<NUM>) which develops substantially parallel to the lying plane of the fixing portion (<NUM>) of the base (<NUM>) when the target surface of the building structure or similar support structure is substantially vertical. In an independent <NUM>th aspect, there is a method for assembling and installing a crane (<NUM>) for confined spaces that includes:.

In a <NUM>th aspect dependent on the preceding aspect, the step of engaging the first end (5a) of the support strut (<NUM>) of the crane (<NUM>) into the engagement seat (<NUM>, <NUM>) of the installation base (<NUM>) of the crane (<NUM>) is carried out by engaging the first end (5a) of the support post (<NUM>) into the engagement seat (<NUM>) of the installation base (<NUM>) when the target surface of the building structure or the similar supporting structure is substantially horizontal.

In a <NUM>th aspect dependent on the <NUM>th or <NUM>th aspect, the step of engaging the first end (5a) of the support post (<NUM>) of the crane (<NUM>) in the engagement seat (<NUM>, <NUM>) of the installation base (<NUM>) of the crane (<NUM>) is carried out by engaging the first end (5a) of the support post (<NUM>) in the auxiliary engagement seat (<NUM>) of the installation base (<NUM>) when the target surface of the building structure or the similar supporting structure is substantially vertical.

Further features and advantages will be more apparent from the detailed description of a preferred, but not exclusive, form of execution of a confined space crane, as well as a basis for the installation of the above-mentioned crane on corresponding target areas of building structures or similar supporting structures.

This description is given below with reference to the accompanying drawings, which are provided for illustrative purposes only and are therefore not limiting in scope:.

With reference to <FIG> and <FIG>, a confined space crane according to the present invention is collectively referred to as <NUM>.

As can be seen in <FIG> and <FIG>, the crane <NUM> comprises a support post <NUM> extending along a prevailing direction having a first end 5a, optionally of cylindrical shape, arranged to engage an installation base <NUM> which will be described in detail below, and a second end 5b, opposite to the first end 5a, arranged to engage and support a lifting arm <NUM> having a cantilevered end 6a cantilevered from the support post <NUM>.

In accordance with the design solution shown in <FIG>, on the opposite side to the cantilevered end 6a, the lifting arm <NUM> has a bottom end 6b which is also cantilevered from the support post <NUM>.

At an intermediate point at the free and bottom ends 6a, 6b, the lifting arm <NUM> is fixedly engaged with the second end 5b of the support frame <NUM> according to a predetermined orientation which is determined during the design phase or during assembly.

As an alternative, it is also possible to envisage a constructional solution, not shown in the accompanying figures, in which the lifting arm <NUM> is hinged to the second end 5b of the support post <NUM>, being able to rotate with respect to the latter so as to assume different angles in the plane of rotation according to contingent needs.

It is advantageous that the lifting arm is telescopic so that it can be lengthened or shortened.

Referring again to <FIG>, the crane <NUM> is provided with an oblique support rod <NUM> connecting a portion of the support post <NUM>, intermediate to the first end 5a and the second end 5b of the latter, to the bottom end 6b of the lifting arm <NUM>.

In detail, the oblique support rod <NUM> has a first end 13a bolted to the support post <NUM> and a second end 13b bolted to the bottom end 6b of the lifting arm <NUM>.

Optionally, the crane <NUM> can also provide for the use of at least one lifting device <NUM> (suitably schematized) which is removable from the support post <NUM> or the lifting arm <NUM>.

In the specific case of the embodiment shown in <FIG>, the lifting device <NUM> can be mounted on the lifting arm <NUM> by means of a corresponding attachment portion 6c which is arranged between the cantilevered end 6a and the bottom end 6b.

Referring again to the embodiment shown in <FIG>, the lifting arm <NUM> can be provided with two or more attachment portions 6c which allow the lifting device <NUM> to be mounted, according to different positions, along the lifting arm <NUM>, or different lifting devices <NUM> to be mounted on the same lifting arm <NUM>.

Generally, the lifting device <NUM> is provided with at least one cable <NUM> having a hook 8a for hooking a load to be raised or lowered. The cable <NUM> is at least partially wound on a corresponding winding mechanism <NUM> of the lifting device <NUM>, operable for lifting or lowering the hook 8a and, consequently, any load associated therewith.

In order to support the cable <NUM> in movement along the lifting arm <NUM>, the cantilevered end 6a of the latter is provided with one or more idler pulleys 6d on which the cable <NUM> changes its orientation to hang vertically from the cantilevered end 6a.

In the event that two lifting devices <NUM> mounted on the lifting arm <NUM> of the crane <NUM> are provided, it is advantageous to have a minimum of two idler pulleys 6d operatively located at the cantilevered end 6a of the lifting arm <NUM>, each dedicated to a corresponding cable.

In accordance with the construction solution illustrated in <FIG>, there are some differences to crane <NUM> illustrated in <FIG>.

First of all, the lifting arm <NUM> has a bottom end 6b solidly connected to the second end 5b of the support post <NUM> to form a fixed inverted 'L' structure with the latter.

The lifting arm is not telescopic and maintains a fixed length so it cannot be extended or shortened.

In addition, crane <NUM> has no oblique support rods or similar structural support elements between support arm <NUM> and lifting arm <NUM>.

The attachment portion 6c of the lifting device <NUM> is positioned on the support post <NUM>, in proximity to the second end 5b of the latter, and an auxiliary idler pulley 6e is located at the connection area between the lifting arm <NUM> and the support post <NUM>. The cable <NUM> then runs from the winding mechanism <NUM> of the lifting device <NUM> via the auxiliary deflection sheave 6e located at the bottom end 6b of the lifting arm <NUM> and the idler pulley 6d of the cantilevered end 6a of the latter, from which it hangs vertically terminating with the corresponding hook 8a.

An additional attachment portion 6c is provided along support post <NUM> at a position further away from the second end 5b.

Again, different portions of attachment 6c allow for different engagement positions of lifting device <NUM> to support post <NUM>, or the simultaneous engagement of different lifting devices <NUM> or otherwise to support post <NUM>.

In the case where two lifting devices <NUM> are provided mounted on the same support post <NUM> of the crane <NUM>, it is advantageous to have both two auxiliary idler pulleys 6e operatively located in the connection region between the lifting arm <NUM> and the support post <NUM>, and two idler pulleys 6d operatively located at the cantilevered end 6a of the lifting arm <NUM>, each dedicated to a corresponding cable <NUM>.

Both construction solutions have, in cross-section, an external profile, of the support post <NUM> and/or lifting arm <NUM>, which is substantially polygonal, preferably octagonal.

In both design solutions, the first end 5a of the support post <NUM> of the crane <NUM> is substantially cylindrical in shape.

Again with reference to the design solutions illustrated in <FIG> and <FIG>, crane <NUM> is advantageously equipped with an installation base <NUM> which allows it to be installed on a target surface of a respective building structure or similar substantially horizontal (as illustrated in <FIG>) or substantially vertical (as illustrated in <FIG>) support structure.

Taking the embodiments shown in <FIG> as a reference, the installation base <NUM> has a single body, preferably made of a single material.

More specifically, the installation base <NUM> comprises at least one fixing portion <NUM> prepared to be fixed on a target surface of a building structure or a similar supporting structure.

The fixing portion <NUM> of the installation base <NUM> comprises at least two support plates 3a separated from each other and each lying on the same lying plane as the fixing portion <NUM>.

Each support plate 3a of the fixing portion <NUM> has a substantially rectangular shape and develops with its long sides substantially parallel to the long sides of the other support plate 3a.

Each support plate 3a of the fixing portion <NUM> has two through openings 3b arranged on opposite sides of it.

The through openings 3b of each support plate 3a of the fixing portion <NUM> each has a substantially oval or elliptical shape to permit adjustment of the installation position of the installation base <NUM> along at least one direction parallel to the target surface of the respective building structure or the similar supporting structure.

Preferably, a through opening 3b of the support plate 3a of the fixing portion <NUM> develops predominantly along a direction substantially orthogonal to the prevailing development of the other through opening 3b of the same support plate 3a, in order to allow an adjustment of the installation position of the installation base <NUM> along two directions orthogonal to each other and substantially parallel to the target surface of the respective building structure or the respective supporting structure.

As shown in <FIG>, the installation base <NUM> comprises at least one engagement seat <NUM> arranged to receive in engagement, preferably by insertion, the first end 5a of the support post <NUM> of the crane <NUM>.

In particular, the engagement seat <NUM> of the installation base <NUM> runs predominantly transverse, preferably perpendicular, to a lying plane of the fixing portion <NUM>, so that when it is engaged by the support post <NUM>, the latter is perpendicular to the lying plane of the fixing portion <NUM> of the installation base <NUM>.

In order to clearly show the direction of development of the engagement seat <NUM> of the installation base <NUM> in relation to the lying plane of the fixing portion <NUM>, the longitudinal axis of prevailing development X of the same which in the condition of attachment to a target surface of a respective building structure or similar support structure is perpendicular to it, is shown in <FIG>.

Going into more detail, the engagement seat <NUM> of the installation base <NUM> is defined at least in part by three cylindrical portions 4a, 4b, 4c, each made through a respective central plate 2a, 2b, 2c, of the installation base <NUM>, preferably substantially parallel to each other and substantially parallel to the lying plane of the fixing portion <NUM>.

The central plates 2a, 2b, 2c, of the installation base <NUM> are spaced apart from each other along the prevailing development axis X in such a way that the cylindrical portions 4a, 4b, 4c provide the first end 5a of the support post <NUM> of the crane <NUM> with corresponding spaced contact rings intended to engage different zones of the first end 5a of the support post itself.

As can be seen in <FIG>, the cylindrical portions 4a, 4b, 4c, which at least partially define the engagement seat <NUM> of the installation base <NUM>, are identical.

In addition, the cylindrical portions 4a, 4b, 4c, which at least partially define the engagement seat <NUM> of the installation base <NUM>, are superimposed and aligned along the longitudinal axis of prevailing development X, namely along a transverse direction substantially perpendicular to the plane of engagement of the fixing portion <NUM>.

As an alternative to what is shown in <FIG>, it is not excluded that the engagement seat <NUM> is defined by two cylindrical portions 4a, 4b each made by means of a respective central plate 2a, 2b of the installation base <NUM>, parallel to each other and substantially parallel to the plane of the lying plane of the fixing portion <NUM>. Also in this case, the cylindrical portions 4a, 4b are identical and preferably overlapping and aligned along the longitudinal axis of prevailing development X.

It is also possible to envisage that the engagement seat <NUM> of the installation base <NUM> is defined by a single cylindrical portion 4a, 4b, 4c which develops along the longitudinal axis of prevailing development X. In this case, the cylindrical portion 4a, 4b, 4c must have dimensions such as to ensure the stability of the coupling with the first portion 5a of the support post <NUM>.

Advantageously, the installation base <NUM> further comprises at least one auxiliary engagement seat <NUM> arranged to receive in engagement the first end 5a of the support post <NUM>. The auxiliary engagement seat <NUM> develops transversely, optionally perpendicularly, with respect to the engagement seat <NUM>, so that when it is engaged by the support post <NUM> the latter is substantially parallel to the lying plane of the fixing portion <NUM> of the installation base <NUM>.

In order to clearly show the prevailing direction of development of the auxiliary engagement seat <NUM> of the installation base <NUM> in relation to the lying plane of the engagement portion <NUM>, the longitudinal axis of prevailing development Y of the same, which in the condition of attachment to a target surface of a respective building structure or a similar supporting structure, and substantially parallel to it, is shown in <FIG>.

Advantageously, the first end 5a of the support post <NUM> of crane <NUM> can be coupled to either the engagement seat <NUM> or the auxiliary engagement seat <NUM> depending on the orientation of the target surface of the respective building structure or the similar supporting structure.

Preferably, the auxiliary engagement seat <NUM> is defined at least in part by two cylindrical tangs 10a which develop predominantly perpendicular to the prevailing development of the engagement seat <NUM> of the installation base <NUM>, optionally substantially parallel with respect to lying plane of the fixing portion <NUM>.

The cylindrical tangs 10a defining the auxiliary engagement seat <NUM> of installation base <NUM> are specularly identical and are aligned along the longitudinal axis of prevailing development Y.

Alternatively, the auxiliary engagement seat <NUM> can be defined by a single cylindrical tang whose dimensions are such as to ensure the stability of the engagement of the first portion 5a of the support post <NUM>.

Again referring to <FIG>, the engagement seat <NUM> of the installation base <NUM> passes centrally, substantially perpendicularly, through auxiliary engagement seat <NUM>.

In detail, the engagement seat <NUM> of the installation base <NUM> divides the auxiliary engagement seat <NUM> into the two cylindrical tangs 10a mentioned above that define it.

As can be seen in <FIG>, the cylindrical tangs 10a which at least partially define the auxiliary engagement seat <NUM> of the installation base <NUM> are tangential to the first central plate 2a and the second central plate 2b of the installation base <NUM>.

Again referring to <FIG>, it can be seen that the third central plate 2c of the installation base <NUM> is interposed between the second central plate 2b of the installation base <NUM> and the support plates 3a of the fixing portion <NUM> of the latter.

In addition, the installation base <NUM> comprises two walls <NUM> substantially orthogonal to the lying plane of the fixing portion <NUM> and substantially parallel to each other. Each wall <NUM> develops between the first central plate 2a of the installation base <NUM> and the respective support plate 3a of the fixing portion <NUM> to define a substantially box-like or parallelepiped volume in which the engagement seat <NUM> and the auxiliary engagement seat <NUM> are defined.

The cylindrical tangs 10a defining the auxiliary engagement seat <NUM> of the installation base <NUM> are tangent to the walls <NUM> of the latter, so that each cylindrical tang is inscribed in a substantially parallelepiped or cubic solid, however substantially box-shaped.

Unlike the embodiment shown in <FIG>, the embodiment shown in <FIG> provides for two auxiliary walls 11a, which are substantially orthogonal to the walls <NUM> and the auxiliary engagement seat <NUM>, to close, at least in part, the installation base <NUM> at the front and rear, leaving the auxiliary engagement seat <NUM> free to accommodate the support post <NUM> in engagement.

As can be seen in <FIG>, each auxiliary wall 11a has a substantially trapezoidal shape with a major base developing from one end to the other of the support plates 3a of the fixing portion <NUM> and a minor base coinciding, approximately, with the first central plate 2a of the installation base <NUM>.

According to this configuration, the installation base <NUM> has a corresponding lateral concavity <NUM> at each support plate 3a of the fixing portion <NUM>.

Each lateral concavity <NUM> is, at least in part, delimited by a respective fixing plate 3a of the fixing portion <NUM>, a respective wall <NUM> of the installation base <NUM> and two triangular portions 11b, opposite and facing each other, each afferent to a respective auxiliary wall 11a of the installation base <NUM>.

According to an embodiment of the present invention, it is possible to provide for the installation base <NUM> to be carried out by welding together different tile components, such as the embodiment shown in <FIG>.

Instead, according to another embodiment of the present invention, it is possible to provide for the installation base <NUM> to be made by casting and/or moulding, such as the embodiment shown in <FIG>.

In order to ensure the coupling between the first end 5a of the support post <NUM> of crane <NUM> and one of the engagement seats <NUM>, <NUM> of the installation base <NUM>, crane <NUM> may be provided with at least one coupling sleeve <NUM> (<FIG> and <FIG>), preferably of cylindrical shape.

The coupling sleeve <NUM> comprises a first cylindrical portion 12a insertable in at least one of the engagement seats <NUM>, <NUM> of the installation base <NUM> and has at least one circular shoulder 12b which protrudes transversely, preferably perpendicularly, outwards from one end of the first cylindrical portion 12a itself so as to rest supported against a corresponding edge of the corresponding engagement seat <NUM>, <NUM> of the installation base <NUM>.

The coupling sleeve <NUM> comprises a second cylindrical portion 12c that can be fitted to the first end 5a of the support post <NUM> of crane <NUM> and inserted into the first cylindrical portion 12a to ensure correct coupling between crane <NUM> and installation base <NUM>.

The coupling sleeve <NUM> allows coupling between support posts <NUM> of crane <NUM> having first ends 5a of different dimensions than the dimensions of the corresponding engagement housings <NUM>, <NUM> of installation base <NUM>.

In other words, the coupling sleeve <NUM> acts as an intermediate adapter between the engagement seats <NUM>, <NUM> of the installation base <NUM> and the first end 5a of the support post <NUM> of the crane <NUM>.

Different sized coupling sleeves <NUM> allow the engagement seats <NUM>, <NUM> of the installation base <NUM> to accommodate in engagement first ends 5a of different sizes of corresponding support posts <NUM> of different sizes.

It should also be noted that shapes other than cylindrical can be considered both with regard to the external shape of the first ends 5a of the support posts <NUM> of the cranes <NUM> and with regard to the inner profile of the engagement seats <NUM>, <NUM> of the installation base <NUM>. Of course, in order to ensure the coupling between the first end 5a of the support post <NUM> of the crane <NUM> and at least one of the engagement seats <NUM>, <NUM> of the installation base <NUM>, the external shape of the first end 5a which differs from the cylindrical shape will have to be reproduced in negative by the shape of the engagement seats <NUM>, <NUM> of the installation base <NUM>.

In other words, the first end 5a of the support post <NUM> is externally counter shaped to, or closely resembles the shape of, the inner profile of the engagement seats <NUM>, <NUM> of the installation base <NUM>. Accordingly, the inner profile of each engagement seat <NUM>, <NUM> of the installation base <NUM> is counter shaped to, or closely resembles the external shape of, the first end 5a of the support post <NUM>.

According to this aspect, it is possible to provide a first end 5a of the support post <NUM> of crane <NUM> having an elliptical or polygonal profile and engagement seats <NUM>, <NUM> of the installation base <NUM>, also having an elliptical or polygonal internal profile that recalls in negative the profile of the first end 5a of the support post <NUM>.

In this way, profiles other than the cylindrical one avoid any possibility of relative rotation between the support post <NUM> of the crane <NUM> and the installation base <NUM> at the first end 5a and at the engagement seat <NUM>, <NUM> occupied.

Of course, the coupling sleeve <NUM> must also have the same profile as the engagement housings <NUM>, <NUM> of the installation base <NUM> and the first ends 5a of the support posts <NUM> of the cranes <NUM> in order to allow the coupling between these elements.

Regardless of the shape of the first ends 5a of the support posts <NUM> of the cranes <NUM> and the engagement seats <NUM>, <NUM> of the installation base <NUM>, the locking of one element in the other is ensured by an interference engagement of the first end 5a of the respective support post <NUM> of the crane in the corresponding engagement seat <NUM>, <NUM> of the installation base <NUM>.

A method of assembling and installing the confined space crane <NUM> described above is also an object of the present invention.

The assembly and installation method includes the steps of:.

More specifically, the engagement of the first end 5a of the support post <NUM> of the crane <NUM> in the engagement seat <NUM>, <NUM> of the installation base <NUM> of the crane <NUM> is carried out by engaging the first end 5a of the support post <NUM> in the engagement seat <NUM> of the installation base <NUM> when the target surface of the building structure or the similar supporting structure is substantially horizontal.

Conversely, when the target surface of the building structure or the similar supporting structure is substantially vertical, the engagement of the first end 5a of the support post <NUM> of the crane <NUM> into the engagement seat <NUM>, <NUM> of the installation base <NUM> of the crane <NUM> is carried out by engaging the first end 5a of the support post <NUM> into the auxiliary engagement seat <NUM> of the installation base <NUM>.

If necessary, the insertion of the first end <NUM> of the support post <NUM> into the respective engagement seat <NUM>, <NUM> is carried out after the interposition of a respective coupling sleeve <NUM>, as described above and illustrated in <FIG> and <FIG>.

The installation base <NUM> provided with an engagement seat <NUM> orthogonal to the locating plane of the fixing portion <NUM> and an auxiliary engagement seat <NUM> orthogonal to the engagement seat <NUM> and parallel to the locating plane of the fixing portion <NUM> gives the crane the flexibility to be installed on both a horizontal and a vertical target surface.

The presence of an installation base as described above significantly reduces the production and marketing costs of such cranes since two or more installation bases, each dedicated to a specific target area, no longer have to be provided.

It should also be pointed out that the presence of a single installation base <NUM> capable of allowing the crane to be installed on different target areas makes it possible to reduce the storage and warehousing volumes of both manufacturers/sellers and owners of such cranes normally dedicated to these products and objects.

Claim 1:
Crane (<NUM>) for confined spaces comprising:
an installation base (<NUM>) having at least one fixing portion (<NUM>) arranged to be fixed on a target surface of a building structure or similar support structure and at least one engagement seat (<NUM>) that runs predominantly transversely, preferably perpendicularly, to a plane of the fixing portion (<NUM>);
a support post (<NUM>) which runs along a prevailing direction and has a first end (5a) arranged to engage the at least one engagement seat (<NUM>) of the installation base (<NUM>) and a second end (5b) facing away from the first end (5a);
a lifting arm (<NUM>) engaged to the support post (<NUM>), preferably at the second end (5b) of the support post (<NUM>), and having at least one cantilevered end (6a);
optionally, at least one lifting device (<NUM>) removably attached to the support post (<NUM>) or lifting arm (<NUM>), equipped with at least one cable (<NUM>) having a hook (8a) for hooking a load to be lifted or lowered, the lifting device (<NUM>) comprising at least one winding mechanism (<NUM>) operable for lifting or lowering the hook (8a) and, consequently, the load associated with it;
characterized by the fact that the installation base (<NUM>) additionally includes at least one auxiliary engagement seat (<NUM>) arranged to receive in engagement the support post (<NUM>) which develops transversely, optionally perpendicularly, with respect to the engagement seat (<NUM>), the first end (5a) of the support post (<NUM>) of the crane (<NUM>) being coupled to the engagement seat (<NUM>) or to the auxiliary engagement seat (<NUM>) depending on the orientation of the target surface.