EP1794369A1

EP1794369A1 - An arrangement that can be readily manoeuvred.

Info

Publication number: EP1794369A1
Application number: EP05777133A
Authority: EP
Inventors: Carl Anders Rosenqvist; Carl Johan Nicklas BERGSTRÖM; Björn SÖDERBERG; Karl-Olof Petterson
Original assignee: Rosenqvist Rail TECH AB
Current assignee: Rosenqvist Rail AB
Priority date: 2004-09-17
Filing date: 2005-09-01
Publication date: 2007-06-13
Anticipated expiration: 2025-09-01
Also published as: SE0402254D0; SE528641C2; EP1794369B1; SE0402254L; WO2006031168A1

Abstract

The present invention relates to an arrangement (1), which can be readily manoeuvred by an operator (0) and which comprises a power unit (IA) driven by combustion engine (10) on a rotatable driven shaft, a coupling unit (11) co-ordinated on one side with said driven shaft and on the other side with a tool unit (IB), either directly or indirectly. A fluid pum¬ ping unit (12) is co-ordinated directly with said coupling unit (11) and the coupling unit (11) is adapted to be disconnected or free running relatively to the pumping unit (12) when the power unit (IA) runs at an idling speed and to be connected relative to or driving the pumping unit (12) at a speed that exceeds said idling speed, therewith to create a fluid- related hydraulic pressure that, through the medium of pressure line, causes tool unit (IB) via an hydraulic piston-cylinder-device (22) to switch from a first initially inactive state to a second active state in which a fastener clip is displaced to or from a fastening position. The tool unit (IB) includes a first coupling element (31) in a first two-part coupling means (30) adapted for co-action with a second coupling element (32) related to a manoeuvring lever (1C).

Description

TITLE OF THE INVENTION:

AN ARRANGEMENT THAT CAN BE READILY MANOEUVRED.

FIELD OF INVENTION

The present invention relates generally to an arrangement that can be readily manoeuvred or manipulated by an operator and more particularly to a manually manoeuvrable arrangement which can be readily used or displaced along a rail of a railroad track and which is adapted for a movement or displacement along such a rail and comprises a tool unit which has a gripping function and which includes a piston-cylinder-device or its like wherein movement of a piston in a cylindrical part of said device causes legs associated with the gripper to move towards and away from fastener parts related to a section of a rail track rail and therewith towards or away from said rail section.

The invention can be applied, beneficially, when wishing to displace one or two fastener ele¬ ments (briefly referred to as clips) in relation to co-action with a holding element positioned adjacent to and secured to a section of a rail track rail, a rail track rail, these fastener elements being referred to hereinafter as "clips", which are either displaced individually or simultaneo¬ usly.

According to the directives of the invention, these holding elements and their associated faste- ners or clips may conveniently be assigned to one and the same rail-supporting sleeper.

BACKGROUND OF THE INVENTION

Many different embodiments of methods, arrangements and systems for securing fasteners or clips to a rail of a rail road track and to a section of such a rail have been proposed, such as the fasteners retailed under the trade names "Fast clip", "Safe lock II" and "Safe lock III".

Among these known systems, a first category includes clips which can be fastened by more or less automatic displacement for co-action between a rail section of a railway track and under¬ lying sleepers to sleeper-associated holders by co-ordinating necessary elements on a carriage that can be displaced or driven along parallel sleepers placed loosely on said rail in mutually • parallel relationships, where four holders and clips for one and the same sleeper can be faste¬ ned simultaneously to its particular one of the loosely placed and mutually parallel rails.

In a second category of these known systems, solely one of the two rails is fastened to two side-related holders and clips. There is proposed also in this case a carriage-like construction where the arrangement for fastening these two holders and clips is powered by a separate hyd¬ raulic pump.

In this case it has been proposed that an arrangement shall be supported by two wheels and that an arm, which includes a further supportive wheel, shall co-act supportively with the loosely placed and mutually parallel rails. With regard to the features associated with the pre¬ sent invention it can be mentioned that a number of readily portable arrangements that can be easily manoeuvred or manipulated by an operator are earlier known in other fields of applica- tion.

Such arrangements include a power unit, which is driven by a combustion engine that has a driven rotatable shaft, a friction coupling unit co-ordinated with said driven shaft on one side and with a rotating tool on the other side, either directly or indirectly.

SUMMARY OF THE INVENTION TECHNICAL PROBLEMS

When taking into consideration the technical deliberations that a person skilled in this particu¬ lar art must make in order to provide a solution to one or more technical problems that he/she encounters it will be seen that on the one hand it is necessary to realize the measures and/or the sequence of measures that must be undertaken to this end, and on the other hand to realize which means is/are required in solving one or more of these problems. On this basis it will be evident that the technical problems listed below are highly relevant to the development to the present invention.

When considering the earlier standpoint of techniques, as described above, it will be evident that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the constructive measures required in enabling one or a pair of clips to be fastened to an associated holding element secured to a rail section of a railroad track in respect of a chosen application, and therewith create simple conditions which will enable an _t operator to utilize a hand-manoeuvrable arrangement, all while being able to move the arran¬ gement along the rail.

In the case of a portable arrangement that comprises only a few components and can be readi¬ ly manoeuvred by an operator for movement along a rail of a railroad track and comprising a tool unit or assembly that includes a clamping function, such as an inbuilt piston-cylinder dev¬ ice adapted to displace leg elements of the clamping means in response to movement of a pis¬ ton unit within a cylinder-shaped part towards and away from said railroad section and to- wards and away from the fastener elements of the holder related to said rail section it will be seen that a technical problem resides in the ability to realize the significance of, the advanta¬ ges associated with and/or the technical measures required in allowing the tool unit to be allo¬ cated with a first coupling element included in a first two-part coupling means adapted for se¬ cure and simple co-action with a second coupling element related to an arrangement mano- euvring lever.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the tool as¬ sembly to be also provided with a second coupling element included in a second two-part co- upling means adapted for secure co-action with a first coupling element related to a power unit, or vice versa.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the power unit to comprise a combustion engine which is co-ordinated with an hydraulic pump via a centrifugal clutch and to fasten said first coupling element in relation to the casing of a power unit.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing said first and said second two-part coupling means to have mutually the same design, with associated coupling elements configured for ready and stable co-action with one another and their ready separation from one another. Moreover, it will be seen that a technical problem resides in the ability to realize the signifi- v cance of, the advantages associated with and/or the technical measures required in allowing the first coupling element to include a bottom slot which, when in a position in which it co- acts with the corresponding coupling element, will embrace a bottom tongue on the other co- upling element.

It will also be seen that a technical problem resides in realizing the significance of, the advan¬ tages associated with and/or the technical measures required in allowing a combustion engine and an hydraulic pump coupled to the engine via a centrifugal clutch to be included in a power unit and to allow the piston-cylinder-device with its associated clamping function to be inclu¬ ded in a tool unit and with associated hydraulic hoses or lines between the hydraulic pump and the piston-cylinder-device to be disposed for passage across and beyond said second co¬ upling means when they are in a mutually co-acting position.

It will be seen that a further technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the po¬ wer unit to be given an own centre-of-gravity related carrier handle and to allow the tool unit to be given an own centre-of-gravity related carrier handle so that said units can be readily carried by the operator or the like for easy connection of the units to one another in operation.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the legs of the clamping function to be pivotal about a respective pivot shaft disposed centrally of the legs in the vicinity of or adjacent to a clip-fastening tool unit or assembly.

It will also been that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the legs of the clamping function be arranged for displacement along mutually parallel guides in the vici¬ nity of a clip-fastening tool unit.

Another technical problem is one of realizing the significance of, the advantages associated with and/or the technical measures required in allowing the legs intended for the release of clips from their co-action with a rail section by displacement relative to a sleeper-allocated holder to be somewhat pivotal about each of its nearby pivot shafts and restrictively pivotal about its pivot shaft allocated in this respect, via a pin or corresponding element inserted into v a small part of a groove corresponding to the circumference of a circle.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing a pressure spring to be adapted so as to normally hold its allocated leg in a downwardly depressed posi¬ tion in which the free ends of the legs each take a co-ordinated position with respect to one another for a clip-releasing movement in response to actuation of the piston-cylinder-device.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing the power unit to include a runner intended for rolling abutment with an upper surface of said rail.

It will also be seen that a further technical problem resides in the ability to realize the signifi- cance of, the advantages associated with and/or the technical measures required in allowing said runner to be placed between rail-adapted guides orientated relative to the lower part of the power unit, and to allow these guides to be orientated beneath and/or on one side of the hydraulic pump, as seen in the longitudinal extension of said rail.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the technical measures required in allowing an expan¬ ding movement between said piston part and its associated cylinder part in an activated pis¬ ton-cylinder-device to be capable of being restored to a starting position with the aid of one or two return springs.

When considering the earlier standpoint of techniques as described above it will also be seen that a technical problem resides in the ability to realize the significance of, the advantages as¬ sociated with and/or the constructive measures required in allowing an operator readily mano¬ euvrable arrangement that includes a pump unit, dimensioned for a relatively small volume of fluid, to be co-ordinated directly with said coupling unit and to design the arrangement so that the coupling unit will be disconnected or free-running relative to the pump unit at a chosen id¬ ling speed of the combustion engine and to allow the coupling unit to be connected or activa¬ ted relative to the pump unit when the speed of the combustion engine exceeds said idling speed, so as to thereby be able to create a fluid-related-hydraulic pressure (oil pressure) therewith enabling the piston-cylinder-device to be actuated from a first initial position to a _^ second activated position via a pressurized line.

When considering the earlier standpoint of techniques it will therefore be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the constructive measures required in allowing a tank for a reserve fluid or a reserve fluid volume to be adapted to surround the coupling unit and/or the pump unit, either comple¬ tely or partially, and be related to an outer casing that surrounds the power unit, the coupling and the pump unit among other components.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the constructive measures required in allowing a single readily applied and readily released pressure line and a corresponding return line to extend be¬ tween pump hose connections and hose connections for said piston-cylinder-device.

When considering the earlier standpoint of techniques as described above it will be seen that a technical problem resides in the ability to realize the significance of, the advantages associa¬ ted with and/or the constructive measures required in allowing a by-pass line to extend betwe¬ en the outlet side and the inlet side of the pump unit and to allocate to said line a relief valve which takes a closed state at a pressure below a pre-set value and an open state at a pressure exceeding said pre-set value, wherein said relief valve and said pressure create circulation of pressurised hydraulic fluid.

It will also be seen that a technical problem resides in the ability to realize the significance of, the advantages associated with and/or the constructive measures required in allowing the hyd¬ raulic piston-cylinder-device to be active against upper end-portions of at least one, preferably two arms, which are active as two-arm levers side-related to said rail section, wherewith the end portions of said arms are particularly configured and designed to act against a respective clip, fastening element, side-related to one and the same rail section on an underlying sleeper and therewith its related holder.

When considering the earlier standpoint of techniques as described above, it will be seen that a technical problem resides in the ability to realize the significance of, the advantages associa¬ ted with and/or the constructive measures required in allowing said bottom end portions to be configured for co-action with one ore more standard fasteners or clips, such as clips retailed v under the trade names "Fast clip", "Safe lock II" and "Safe lock III" or other corresponding clips.

SOLUTION

The present invention takes as its starting point the known technology referred to in the intro¬ duction, wherewith an arrangement, that can be readily manoeuvred by an operator, is adapted for displacement along a rail of a railroad track, wherein the arrangement comprises a tool unit which includes a clamping function and a piston-cylinder-device which is intended to dis- place leg elements of the clamping function towards and away from a rail section and towards and away from fastener elements relating to said section, all in response to movement of a pis¬ ton part within a cylinder part, wherein the readily manoeuvred arrangement will preferably include a power unit which is driven by a combustion engine and which includes a shaft which is driven at a selected speed of rotation and which includes a coupling unit co-ordinated on one side of the driven shaft and directly or indirectly with an hydraulic pump on the other side of said shaft.

With the intention of providing a solution to one or more of the technical problems mentioned above, it is particularly proposed, in accordance with the present invention, that the known technology is supplemented by allocating to the tool unit a first mechanical coupling element that forms part of a first two-part coupling means adapted for co-action with a second coup¬ ling element related to a manoeuvring lever.

According to proposed embodiments, the tool unit shall also include a second coupling ele- ment forming part of a second two-part coupling means and adapted for co-action with a first coupling element related to a power unit.

In this regard the power unit shall include a combustion engine that is co-ordinated with a hydraulic pump through the agency of a coupling unit and that the first coupling element shall be related to a casing related to the power unit.

The first and the second two-part coupling means may conveniently have mutually the same design and have associated coupling elements configured for ready co-action with each other in a strength/stable fashion and also for ready separation one from the other. „ The first coupling element may then include a bottom slot, which is intended to securely emb¬ race a bottom tongue on an associated second coupling element.

The second coupling element may include a bottom slot, which is adapted to embrace a bottom tongue on an associated second coupling element.

The combustion engine, the coupling unit and the hydraulic pump are included in a power unit, whereas the piston-cylinder-device and associated clamping function are included in a tool unit wherewith the arrangement includes hydraulic hoses that are intended to pass beyond the second coupling means.

The power unit and the tool unit shall both be allocated its own individual carrying handle.

The clamping legs are pivotally mounted on a centrally positioned pivot shaft adjacent a fastener-applying tool unit.

The clamping legs are arranged for displacement along guides adjacent a fastener-release tool unit.

In α later application, each of the legs is pivotal about a respective nearby pivot shaft and is pivotal to a limited extent about its respective pivot shaft through the medium of a pin inserted into a groove corresponding to part of Lhe circumference of a circle.

A pressure spring is provided for holding its allocated leg in a downwardly depressed and fixed position.

The power unit includes a runner placed between the rail-adapted guides and orientated be¬ neath and/or on one side of the hydraulic pump.

Expanding movement between the piston part or piston unit and associated cylinder part can be restored to an initial state by one or two return springs. It is also proposed, in accordance with the invention, that a fluid pumping unit is co-ordinated , directly with a coupling unit and that the coupling unit is adapted to be disengaged from or free running in relation of the pumping unit when the combustion engine rotates at an idling speed and to be connected to or driven relative to the pumping unit when the combustion engine rotates at a speed greater than said idling speed, therewith creating a fluid-related hydraulic pressure that can cause the piston-cylinder-device to switch from a first inactive state to a second active state through the medium of a pressure line.

The pumping unit is surrounded, either completely or partially, by using a reserve fluid tank.

Preferably, only one single pressure line and one single return line will extend between said pump unit and said piston-cylinder-device.

A by-pass line, to which a relief valve relates, extends between an inlet side and an outlet side of said pump unit.

The hydraulic-piston-cylinder device shall be active towards at least an upper end portion of side-related arms which are active as two-arm levers and the lower end portions of which are adapted to act against a respective fastener device or clip in respect of a chosen rail section of the railroad track.

Fach of said two lower end-portions is configured to suit standard fastener means, such as "Fast clip", "Safe lock II" and/or "Safe lock III".

The piston-cylinder-device has positioned centrally thereof two springs, which are intended to return the piston part to an original state in the absence of an active hydraulic pressure.

One or more runners or support rollers is/are arranged to rest against a rail section.

ADVANTAGES

Those advantages primarily afforded by the present invention and its particular significant characteristic features reside in the creation of conditions which enable an operator to secure at least one clip, normally a pair of clips, on a respective side of a rail section with the aid of an arrangement that can be readily moved and manoeuvred by an operator and also with the aid of an hydraulic pump unit and through the agency of an hydraulically powered tool, that has only one hydraulically actuable piston-cylinder-device, such as to displace said clips to¬ wards one another in a direction at right angles to a longitudinal extension of said rail section. Movements in the reverse direction apply when dismantling a fastener or clip.

The arrangement is comprised of only a few units, for instance a power unit, a tool unit wherewith said units can be held in fixed co-action with each other via a two-part coupling means, wherein one unit includes a first coupling element and the other unit includes a second coupling element.

Movement of the arrangement along the rail section is controlled by a guide rod with the aid of a runner related to the power unit or part thereof.

Those features that can be considered primarily characteristic of the present invention are set forth in the characterising clause of claim 1.

BRIEF DESCRIPTION OF THE DRAWINGS

An embodiment of the present invention at present proposed and illustrating the significant characteristic features of the present invention will now be described solely by way of examp¬ le with reference to the accompanying drawings, in which;

Fig. 1 is a perspective view of an operator holding an inventive arrangement in a sequence in which two clips shall be displaced towards each other in their respective sleeper-related holder in order to fasten a rail section to an underlying sleeper;

Fig. 2 is a horizontal view of the operator and the arrangement shown in figure 1;

Fig. 3 is a diagrammatic view of one embodiment of a manoeuvring rod in the form of a handle in accordance with the figure 1 illustration; Fig. 4 is a perspective view of a power unit and associated coupling element structured in _v accordance with the directives of the invention;

Fig. 5 is a perspective view of one embodiment of a first clip-fastening tool unit;

Fig. 6 is a reversed perspective view of the embodiment shown in figure 5;

Fig. 7 is a perspective view of an embodiment of a second tool unit, intended for clip dismantling;

Fig. 8 is a reversed perspective view of the embodiment shown in figure 7; and

Fig. 9 is an exposed view of part of the embodiment shown in figure 7.

DESCRIPTION OF EMBODIMENTS AT PRESENT PREFERRED

It is pointed out initially that we have chosen to use in the following description of a preferred embodiment that includes characteristic features significant of the present invention and illust¬ rated in the figures of the accompanying drawings, special terms and terminology with the primary intention of illustrating the inventive concept more clearly.

It will be noted, however, that the expressions chosen here shall not be seen as limited solely to the chosen terms used in the description, but that each term chosen shall be interpreted as also including all technical equivalents that function in the same or at least essentially in the same way so as to achieve, or essentially achieve, the same purpose and/or technical effect.

Figure 1 thus illustrates schematically the fundamental requirements for and the application of the present invention with the properties significant of the invention, generally concretised by the proposed embodiment described in more detail hereinafter.

In the illustrated case, an arrangement 1 that can be readily manoeuvred by an operator "O" is adapted for displacement along a rail 2 of a railroad track resting on a number of disposed sleepers, one of which has been given the reference numeral 3. According to the invention, the illustrated arrangement is structured in three parts or units, each having provided there betwe- en mutually co-acting coupling elements for quick and flexurally rigid co-action with one , another and rapid separation from each other.

These three units have been designed in the following description as a power unit IA, a tool unit IB and a manoeuvring rod 1C.

The power unit IA is comprised of a combustion engine, a coupling unit, which is actively re¬ sponsive to centrifugal force, and an hydraulic pump which will be described more specifical¬ ly hereinafter.

The tool unit IB is comprised of elements for creating a clamping function and includes to this end a piston-cylinder-device or its like adapted to carry out an expanding and compres¬ sing movement, such as the forward and rearward movement of a piston within a cylindrical part, therewith displacing legs of the clamping element towards and away from a rail section 2A and towards and away from a fastener or fastener parts 4 related to said rail section, as de¬ scribed in more detail hereinafter.

A holder A related to a sleeper 3 is fastened to the upper surface 3 A of the sleeper and co-acts with or carries an attachment element, fastener element, designated clip B which is adapted for displacement relative to the holder A to a fastening position, in which the rail section 2A is fastened to the sleeper 3, or, alternatively, to a dismantling position in which the rail section is freed from the sleeper 3.

In this regard, the invention includes a first tool part (IB) for carrying out a fastener applying function and a second tool part (IB') for carrying out a fastener dismantling function.

Figure 2 is intended to illustrate the manoeuvring rod 1C in a U-shaped configuration and to show that an intermediate part 1C is adapted to allow the operator "O" to stand in a direct ex¬ tension to B of the rail 2 or to stand on one side of a direct extension 2B of said rail 2, in the manner illustrated.

Figure 3 shows the manoeuvring rod 1C with a straight intermediate part 1C for central posi¬ tioning of the operator "O", and also shows a handle Ic" whose movement is coupled to the carburettor of said engine so as to enable the speed of the engine to be controlled and there¬ with actuate indirectly a centrifugally active coupling or clutch.

The handle shall be brought to a released position (shown in figure 3) with regard to an engine idling speed and to a valid position in respect of a top speed and fully accelerated engine so as to cause the hydraulic pump to operate at maximum power.

Figure 4 is a perspective view that illustrates a power unit IA comprising a combustion engi¬ ne 10 and being of a kind of known construction having a coupling or clutch 11 connected to a rotatable output shaft and an hydraulic pump 12 driven by the coupling.

In the case of this embodiment, a casing 13 is allocated a coupling element whose nature will be described more specifically hereinafter.

The tool unit IB will now be described in more detail with reference to figures 5 and 6.

The tool unit IB includes two-side related arms 20 and 21, which are pivotally mounted at their central parts, and a piston-cylinder-device 22 whose construction and function will be described more specifically hereinafter.

More particularly, the tool unit IB shall include a first coupling element 31 in the form of a first two-part coupling means 30 adapted for co-action with a second coupling element 32 related to a manoeuvring lever or manoeuvring rod 1C.

The tool unit IB also includes a second coupling element 42 forming part of a second two- part coupling means 40 adapted for co-action with a first coupling element 41 related to the power unit IA.

The power unit IA thus includes an combustion engine 10 which is co-ordinated with the centrifugal coupling 11 and the hydraulic pump 12 via interconnecting means in a known manner, wherein a casing 13 related to the power unit IA is related to one end of the first coupling element 41. The first two-part coupling means 30 and the second two-part coupling means 40 are conveni- ently of similar design or at least essentially similar design and together with associating coupling elements 31,32; 41,42 are designed for ready and secured co-action with one another and for ready separation one from the other.

The first coupling element 31 allocated to the first coupling means 30 includes a bottom slot 3 IA which is intended to embrace a bottom tongue 32B on its associated second coupling ele¬ ment 32.

The second coupling means 40 allocated to the first coupling element includes a bottom slot 41 A intended to embrace a bottom tongue 42B on its associated second coupling element 42.

The most essential components of a power unit IA are a combustion engine 10 and an hydra¬ ulic pump 12 co-ordinated with the centrifugal coupling, whereas the piston-cylinder-device 22 with its associated clamping function is included in a tool unit IB, with associated hydrau¬ lic hoses (not shown) adapted to pass beyond said second coupling means 40.

In figure 4 the hydraulic hose outlet to the piston-cylinder-device 22 has been referenced 14 and 14a, while the corresponding hydraulic hose output to said piston-cylinder-device 22 has been referenced 15 and 15a in figure 5. The hydraulic hoses may be attached with the aid of available quick couplings.

The power unit IA and the Lυυl unit IB are relatively light in weight and each is equipped with a respective carrying handle 16 and 17, these carrying handles being orientated in respect of the own centre of gravity of respective units and therewith enable the units to be carried simultaneously by hand, due to their low weight.

Figures 5 and 6 illustrate the legs 20, 21 in a fully open position and the piston-cylinder-devi¬ ce in a fully withdrawn and inactive state.

The figures clearly show that the clamping legs 20, 21 are pivotally mounted about their re¬ spective central pivot shafts 2OA and 21 A in respect of a clip applying tool unit IB. Figures 7, 8 and 9 illustrate a clip dismantling tool unit IB', showing the legs 20' and 21 ' in a , fully combined position and the piston-cylinder-device 22 in a fully closed state.

More particularly, it will be seen that in respect of a clip dismantling tool unit IB' the clamp- ing legs 20' and 21 ' are displaceable horizontally along mutually parallel and horizontal gui¬ des 50, 51.

As illustrated in figure 9, both legs 20' and 21 ' shall be mounted for a given degree of rotati¬ on.

However, for the sake of simplification, figure 9 shows solely that the leg 20' is pivotal about a chassis-related pivot shaft 52 and is only able to pivot to a limited extent about said shaft 52.

This limited pivotal movement is achieved with the aid of a pin 53 mounted on said chassis and inserted into a part of a circle-circumferential groove 54.

The pins 52 and 53 shall be placed in mutual horizontal space relationship and orientated in an applicable force component. The pin 52 shall be placed slightly above the pin 53 in the force component.

A pressure spring 55 is adapted to hold the leg 20' in a depressed and maximally forwardly displaced position, according to figure 9.

When dismantling a clip, it is necessary that the lowermost parts 2OC and 21 C of the legs 20 and 21 ' can be readily bent outwards or swung upwards so as to enable them to pass over the upper thickened part of the rail 2 and the uppermost part 2D and then connect with the narro¬ wer web 2E of the rail and be able to co-act with the inner part of the clip B facing towards said web.

The power unit IA is also provided with a runner 60, which is intended to run along the upper surface 2C of the rail. The runner 60 is placed between rail-adapted guides 61 and 62 that in¬ clude collars and are orientated beneath and/or on one side of the hydraulic pump 12. Expanding movement between said piston part or piston unit 22 A' and associated cylinder , part 22B' can be restored by one or two return springs (not shown in figures 5 and 6) that are clearly shown in figure 7, where the piston part 22 A' and its cylinder part 22B' in the tool IB' are returned with the aid of two return springs referenced 70', 71 '.

A fluid pumping unit 12 is co-ordinated directly with a coupling unit 11, wherein the coupling unit is adapted to be disconnected from the pump unit when the combustion engine is adjusted via the handle 1C "to run at an idling speed and to be connected to the pump unit at a speed towards a full-throttle speed that exceeds said idling speed, so as to therewith create a fluid- related hydraulic pressure which causes the piston-cylinder-device to be actuated from a first state to a second state (not shown) via the pressure lines (not shown).

A tank 80 for reserve fluid is adapted to enclose the pump unit 12 either totally or partially.

One such pressure line extends between the pump unit and the piston-cylinder-device and a single return line extends between the pump unit and the piston-cylinder-device as indicated by means of the connections 14, 14A and 15, 15 A.

A by-pass line (not shown) extends between a respective inlet side and outlet side of the pump unit 12, said line being related to a pressure relief valve.

The hydraulic piston-cylinder-device 22 is active against at least an upper end portion 2OB, 2 IB of side-related amis 20, 21 which act as two-arm levers and the lower end portions 2OC, 21 C of which are adapted to act against a fastener or clip that secures the rail section 2 A to an underlying sleeper 3.

Each of the two lower end portions 2OC and 21 C are configured to fit against standard faste¬ ners, such as fasteners of the type "Fast Clip", "Safe Lock II" and/or "Safe Lock III". As will be seen from figure 7, the piston-cylinder-device 22' is provided centrally with two springs 70' and 71 ', which are adapted to return the piston part 22 A' to an original position in the cy¬ linder part 22B' when the hydraulic pressure no longer acts on the piston as a result of redu¬ cing the speed of the hydraulic pump 12. It will be understood that the invention is not restricted to the exemplifying embodiment de- scribed above and that modifications can be made within the scope of the inventive concept as illustrated in the accompanying claims.

It will be noted in particular that each unit or function can be combined with each other illus¬ trated unit or function within the framework of enabling the desired technical effect and func¬ tion to be achieved.

Claims

1. An arrangement ( 1 ) which can be readily manoeuvred by an operator (O) and which is adapted for displacement along the rail (2) of a railroad track and which includes a tool unit (IB) that has a clamping function and a piston-cylinder-device adapted to displace clamping legs (20,21) towards and away from said rail section and therewith also fast¬ eners (A₅B) related to said section, in response to movement of a piston in a cylinder part, characterized in that the tool unit (IB) comprises a first coupling element (31) included in a first two-part coupling means (30) adapted for co-action with a second coupling element (32) related to a manoeuvring rod or manoeuvring lever (1C).

2. An arrangement according to claim 1 , characterized in that the tool unit (IB) compri- ses a second coupling element (52) that is included in a second two-part coupling me¬ ans (40) adapted for co-action with a first coupling element (41) related to a power unit (IA).

3. An arrangement according to claim 2, characterized in that the power unit includes a combustion engine that is co-ordinated with an hydraulic pump via a centrifugal coup¬ ling and in that a first coupling element (A 1) is related to a power unit related casing.

4. An arrangement according to claim I₃ 2 or 3, characterized in that the first and the second two-part coupling means are of mutually the same the design, or essentially of mutually the same design, wherein associated coupling elements are configured for ready co-action with and ready separation from one another.

5. An arrangement according to claim 4, characterized in that the first coupling element in said first coupling means has a bottom slot which is intended to embrace a bottom tongue of an associated second coupling element.

6. An arrangement according to claim 4 or 5, characterized in that the second coupling means associated with the first coupling element includes a bottom slot which is inten¬ ded to embrace a bottom tongue on an associated second coupling element.

7. An arrangement according to claim 1 , characterized in that the combustion engine, the coupling unit and the hydraulic pump are included in a power unit; in that the piston-cylinder-device with associated clamping function is included in a tool unit, with associated hydraulic hoses being arranged to pass beyond said second coupling means.

8. An arrangement according to claim 1, characterized in that the power unit and the tool unit are each provided with an individual carrying handle.

9. An arrangement according to claim 1 , characterized in that in the case of a fastener applying tool unit the legs instrumental in said clamping function are pivotally moun¬ ted on a centrally orientated pivot shaft.

10. An arrangement according to claim 1 , characterized in that in the case of a fastener dismantling tool unit the legs instrumental in said clamping function are displaceable along mutually parallel guides.

11. An arrangement according to claim 10, characterized in that the legs are pivotally mounted on a respective nearby pivot shaft and are arranged for restricted pivotal mo¬ vement about an allocated pivot shaft through the agency of a pin inserted in a groove corresponding to part of a circle circumference.

12. An arrangement according to claim 11, characterized by a pressure spring that is in- tended to hold the leg in a depressed position.

13. An arrangement according to claim 12, characterized in that the power unit is provi¬ ded with a runner.

14. An arrangement according to claim 13, characterized in that the runner is placed be¬ tween rail-adapted guides and orientated beneath and/or on one side of an hydraulic pump.

15. An arrangement according to claim 1, 2, or 10, characterized in that expanding mo¬ tion between said piston part and its associated cylinder part is restored through the medium of one or two return springs.

16. An arrangement according to claim 1, characterized in that a fluid pumping unit is co-ordinated directly with a coupling unit based on centrifugal effect; in that the coup¬ ling unit is adapted to be disconnected or free running relative to the pumping unit when the combustion engine runs at an idling speed and is connected relative to acti¬ vating the pumping unit when said engine speed exceeds said idling speed, so as to therewith create fluid related hydraulic pressure to cause said piston-cylinder-device to switch from a first state to a second state through the medium of a pressure line.

17. An arrangement according to claim 16, characterized by a tank for reserve fluid that surrounds the pumping unit either partially or totally.

18. An arrangement according to claim 1 or 16, characterized in that solely one pressure line extends between the pumping unit and said piston-cylinder-device.

19. An arrangement according to claim 1 or 16, characterized by a by-pass line which ex- tends between the inlet side and the outlet side of the pumping unit and which relates to a pressure release valve.

20. An arrangement according to claim 1, 9 or 16, characterized in that said hydraulic piston-cylinder-device is active against an upper end portion of side-related arms that are active as two-arm levers, wherewith the lower end portions of said levers are adap¬ ted to act against a fastener device or clip for securing a chosen rail section to an un¬ derlying sleeper.

21. An arrangement according to claim 20, characterized in that each of said two lower end portions are configured to suitably co-act with standard fasteners, such as "Fast

Clip", "Safe Lock II" and/or "Safe Lock III".

22. An arrangement according to claim 20, characterized in that the piston-cylinder- device has orientated centrally therein two springs, which are intended to return said piston part to an original position in the absence of hydraulic pressure.

23. An arrangement according to claim 13 or 14, characterized by one or more runners or support rollers adapted to rest against a rail section.