DESC:FIELD OF INVENTION

The present invention relates to a device for arresting the reverse motion of a trolley carrying heavy components, e.g. engines in automobile manufacturing plant. In particular, the present invention relates to a device for automatically arresting the reverse motion of an engine trolley. More particularly, the present invention relates to a low-cost device for arresting the engine trolley reverse motion.

BACKGROUND OF THE INVENTION

The trolleys carrying heavy components like automobile engines from one assembly location to another in an automobile manufacturing unit, include a simple mechanical linkage to restrict the reverse movement of the engine trolleys during the crucial process of tightening the bolts in the connecting rod cap by applying suitable torque.

Even a small deviation in the location of the engine being worked on, during this bolt tightening/torqueing process may result in generating V1+ defects of bolt loosening. An improper torque may also damage the bolt threads to ultimately cause bolt slippage. Moreover, the operator is subjected to a lot of fatigue while adjusting the proper location of machine, in aligning the spindle socket and connecting rod cap bolt.

Other available options, such as using a manual lock or spring lock also have several disadvantages. For example, the manual lock conventionally used to stop the engine trolley requires the operator to engage and disengage the manual lock for about 160 engines per shift. This adds to a non-value adding (NVA) time of about 4 seconds per engine and thereby causes substantial fatigue to the operator. Although, the manual lock could be replaced by installing a spring lock to eliminate the NVA as well as operator’s fatigue, it led to an unavoidable play in the engine trolley location. So, there is a problem of improper alignment of the connecting rod torqueing machine spindle and bolt due to this incorrect engine trolley location.

Therefore, there is an existing need for developing and making an improved device for arresting the reverse motion of heavy components, like automotive engine trolleys, which overcomes all the above limitations and offers a foolproof solution to the above problems.

There is also a need for a system for operating such a device for arresting the reverse motion of heavy components like automotive engines, which device has simple but robust construction suitable for automobile manufacturing plants and the like.

DISADVANTAGES WITH THE PRIOR ART

The following are the existing arrangement of the system for carrying the engine on trolleys used in the manufacturing facilities for making and assembling the automobiles discussed above and other such mass-produced products and the major disadvantages therewith:

• Generation of V1+ defects like bolt loosening during bolt tightening/torqueing process due to even small deviations in trolley location.

• Bolt thread damage on applying an improper torque, thus causing bolt slippage.

• Excessive operator’s fatigue while adjusting the proper location of the machine, aligning the spindle socket and connecting rod cap bolt.

• Manual lock involves high work/non-value adding time and causes operator’s fatigue.

• Spring lock often causes unavoidable play.

• Spring lock often involves improper alignment of connecting rod torqueing machine spindle and bolt due to incorrect trolley location.

OBJECTS OF THE INVENTION

Some of the objects of the present invention - satisfied by at least one embodiment of the present invention - are as follows:

An object of the present invention is to provide a low-cost, low-maintenance device for arresting the reverse motion of the heavy components like engine trolleys used in automobile manufacturing plants.

Another object of the present invention is to provide a simple device for arresting the reverse motion of the heavy components like engine trolleys used in automobile manufacturing units.

Still another object of the present invention is to provide a device for automatically arresting the reverse motion of the heavy components like engine trolleys to eliminate the conventional manual or spring locking thereof.

Yet another object of the present invention is to provide a robust device for arresting the reverse motion of engine trolleys used in automobile manufacturing units, which reduces operator’s fatigue and is safer to operate.

A still further object of the present invention is to provide an easily operable device for arresting the reverse motion of the heavy components like engine trolleys used in automobile manufacturing units.

A yet further object of the present invention is to provide a device for arresting the reverse motion of the heavy components like engine trolleys used in automobile manufacturing units

These and other objects and advantages of the present invention will become more apparent from the following description, when read with the accompanying figures of drawing, which are however not intended to limit the scope of the present invention in any way.

DESCRIPTION OF THE INVENTION

The device for arresting the reverse motion of the engine trolleys used in automobile manufacturing plants comprises three (3) main components, i.e. a mounting plate, a lever housing and a specially profiled lever for automatic operation. The housing is bolted to the mounting plate by means of a plurality of countersunk screws. The housing holds the profiled lever consisting of a tapered tip. The linearly moving engine trolleys operate the tapered portion of the lever, which causes the lever to initially move upwards along the engine trolley and then to move downwards after the engine trolley completely passes for firmly locking it.

SUMMARY OF INVENTION

In accordance with an embodiment of the present invention, there is provided a device for arresting the reverse motion of a trolley carrying a heavy component such as an automotive engine securely mounted on the top plate thereof, the engine-loaded trolley guided between two side rails of the conveyor guide of a conveyor provided with a vertical stopper thereon fixed between the side rails; the device comprising:

• a guide block supported on a base plate;

• the guide block having a wedge assembly pivoted thereon;

• the wedge assembly pivoted on the guide block by means of a trunnion pin to float up and down; and

• the base plate fixed on at least one of the side rails of the conveyor guide of the trolley by means of a plurality of fasteners for rigidly mounting the device on the rail;

wherein the device is located and fixed on the side rail such that the top plate loaded with the engine is guided between the rails and the wedge assembly slides on top of the top plate while moving forward, and on the top plate front end hitting the vertical stopper, the wedge assembly drops down by gravity to securely arrest the trolley between the vertical stopper and the device. Typically, the device is mounted on the rail with the tapered tip of the wedge facing the incoming engine-loaded trolley.

Typically, the base plate is mounted on the rail by means of a plurality of fasteners.

Typically, the wedge assembly comprises a guide plate and a wedge attached thereto.

Typically, the wedge comprises a flat face to be attached to the guide plate and a tapered surface extending downwards from the tip of the wedge facing the incoming engine-loaded trolley.

Typically, the guide plate is loosely pivoted on the trunnion pin locked between the walls of the guide block and pivotable about the trunnion in a vertical plane.

In accordance with the present invention, there is also provided a system for arresting the reverse motion of a trolley carrying a heavy component such as an automotive engine; the system comprising:

• a conveyor with a vertical stopper centrally disposed thereon at the forward end thereof;

• a conveyor guide having two side rails spaced apart and disposed on the conveyor;

• a trolley securely mounted on the top plate thereof with a heavy component like an automotive engine;

• the trolley guided between the side rails; and

• a device for arresting the reverse motion of the trolley on the conveyor;

wherein the device is located and fixed on one of the side rails to guide the trolley between the rails such that the wedge assembly slides on top of the trop plate of the trolley while moving forward, and on the front end of the top plate hitting the vertical stopper, the wedge assembly drops down by gravity to securely arrest the trolley between the vertical stopper and the device.

Typically, the device comprises:

• a guide block supported on a base plate;
• the guide block fitted with a wedge assembly pivotable thereon; the wedge assembly having a guide plate and a tapered wedge securely attached to the guide plate;

• the guide plate pivoted on the guide block by means of a transverse trunnion pin fixed between side walls of the guide block; and

• the base plate (24) fixed on one of the rails by means of a plurality of fasteners;

wherein the device is located and fixed on the side rail to guide the trolley on the conveyor to facilitate the sliding of the tapered wedge on top of the top plate during a forward movement of the trolley, and to arrest the trolley between the wedge and the vertical stopped by dropping down of the wedge by gravity through the front of the top plate hitting the vertical stopper.

Typically, the device is mounted on the rail with the tapered tip of the tapered wedge facing the incoming engine-loaded trolley.

Typically, the base plate is mounted on the rail by means of a plurality of fasteners.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

The present invention will be briefly described with reference to the accompanying drawings, wherein:

Figure 1 shows a perspective view of the schematic arrangement of the engine loaded trolley on the conveyor by the device for arresting the reverse motion of the engine trolley and configured in accordance with the present invention.

Figure 2 shows a top view of the schematic arrangement of Figure 1 along with a vertical stopper provided on the conveyor.

Figure 3 shows the conventional arrangement of the engine loaded trolley locked on the conveyor by means of a spring lock mechanism for arresting reverse motion of engine trolley on applying torque on connecting rod cap.

Figure 4 shows the schematic arrangement of Figure 1, in which the device for arresting the engine trolley reverse motion is used to avoid problems of the conventional arrangement.

Figure 5 shows a perspective detailed view of the device for arresting the engine trolley reverse motion configured according to the present invention.

Figure 6a shows a perspective view of the device of Fig. 5 with the wedge assembly in a raised condition before arresting the engine trolley in position.

Figure 6b shows another perspective view of the device of Fig.5 with the wedge assembly in a lowered condition to arrest the engine trolley in position.

Figure 6c shows further perspective view of the device of Fig.6b from below.

Figure 7 shows a perspective view of the guide block of the device of Fig. 5.

Figure 7a shows a front view of the guide block of Fig. 7.

Figure 7b shows a side view of the guide block of Fig. 7.

Figure 7c shows a top view of the guide block of Fig. 7.

Figure 8 shows a perspective view of the base plate of the device of Fig. 5.

Figure 8a shows a front view of the base plate of Fig. 8.
Figure 8b shows a top view of the base plate of Fig. 8.

Figure 9 shows a perspective view of the guide plate of the device of Fig. 5.

Figure 9a shows a front view of the guide plate of Fig. 9.

Figure 9b shows a side view of the guide plate of Fig. 9.

Figure 9c shows a top view of the guide plate of Fig. 9.

Figure 10 shows a perspective view of the tapered wedge of device of Fig. 5.

Figure 10a shows a perspective view of the tapered wedge of Fig. 10.

Figure 10b shows a perspective view of the tapered wedge of Fig. 10.

Figure 10c shows a perspective view of the tapered wedge of Fig. 10.

Figure 11 shows a perspective view of trunnion pin of the device of Fig. 5.

Figure 11a shows a front view of the trunnion pin of Fig. 11.

Figure 11a shows a side view of the trunnion pin of Fig. 11.

DETAILED DESCRIPTION OF THE ACCOMPANYING DRAWINGS

In the following, the device for arresting the reverse motion of the engine trolleys used in automobile manufacturing plants configured in accordance with the present invention will be described in more details with reference to the accompanying drawings without limiting the scope and ambit of the present invention in any way.

Figure 1 shows a perspective view of the schematic arrangement of the engine loaded trolley T arrested in position on the conveyor 12 by means of a device 20 configured in accordance with the present invention for arresting the reverse motion (i.e. opposite to direction A of the movement of trolley T) thereof. The arrangement shows an automotive engine 02 mounted on the top plate 08 of engine trolley T on a guide conveyor 10. The guide conveyor 10 has two side rails 04 for mounting the device 20 thereon by means of a plurality of fasteners 06. The engine trolley T is guided between these side rails of the guide conveyor 10 and moves in a direction A.

Figure 2 shows a top view of the schematic arrangement of Figure 1 along with a front vertical stopper 14 provided on the conveyor 12 ahead of the trolley T in the direction A of movement thereof.

Figure 3 shows the conventional arrangement of the engine loaded trolley T locked on conveyor 12 by means of a spring lock mechanism 16 for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of engine trolley T while applying torque on the connecting rod cap. However, by using spring lock mechanism 16, there is an unavoidable play P due to its inherent construction, which is generated as indicated in this figure, due to arc of operation of spring lock 16.

Figure 4 shows the schematic arrangement of Figure 1 along with a front vertical stopper 14 is provided on the conveyor 12 disposed ahead of the trolley T in movement direction A thereof. The device 20 configured in accordance with the present invention is used for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of engine trolley T to eliminate the problems associated with the conventional arrangements (see Fig. 3) using a manual lock or spring lock 16 while applying torque on the connecting rod cap. This device 20 also eliminates non-value adding (NVA) activities and thereby reduces operator’s fatigue and totally eliminates play P or brings this to zero at trolley T location.

Figure 5 shows a perspective detailed view of the device 20 configured in accordance with the present invention for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of engine trolley T. It comprises guide block 22, base plate 24, guide plate 26, tapered wedge 28 and trunnion pin 30. These major components are discussed individually in the following with reference to the respective figures thereof. This guide plate 26 is assembled to the trunnion pin 30 to float up and down. The base structure is mounted on the base plate 24. Here, the width of the rim of the top plate 08 of engine trolley T is used for sliding of tapered wedge thereon. The tapered wedge 28 of the device 20 mechanically slides on the rim and drops by gravity when engine 02 on top plate 08 has passed and the top plate 08 has touched the vertical stopper 14, thereby arresting and locking the engine trolley T without any external force. The device 20 is used at the stage of applying torque to the connecting rod cap using torqueing machine, where it is necessary to precisely locate the engine trolley T. The arrangement can also be used whenever it is desirable to properly and accurately locate trolley T carrying heavy component/s. In this manner, any play P occurring between the loaded component and the trolley arresting device 20 can be successfully avoided.

Figure 6a shows a perspective view of the device 20 of Fig. 5 with wedge 28 in a raised condition for before arresting the engine trolley T in position.

Figure 6b shows another perspective view of the device 20 of Fig. 5 with wedge 28 in a lowered condition for arresting the engine trolley T in position.

Figure 6c shows yet another perspective view of the device 20 of Fig. 6b as seen from below.

Figure 7 shows a perspective view of guide block 22 of device 20 of Fig. 5. It has two side walls joined by a base to form a U-shaped profiled. Side walls have a hole for passing the trunnion 30 therethrough for pivoting the wedge assembly thereon.

Figure 7a shows a front view of the guide block 22 of Figure 7 having countersunk holes for mounting it on base plate 24, and holes for rotatable mounting of the trunnion pin 30 therein.

Figure 7b shows a side view of the guide block 22 of Figure 7 having the countersunk holes to mount it on base plate 24 and holes for trunnion pin 30.
Figure 7c shows a top view of the guide block 22 of Figure 7 with four countersunk holes and holes in side walls thereof for fitting a trunnion pin 30.

Figure 8 shows a perspective view of base plate 24 of device 20 of Fig. 5 with four smaller holes to mount the base plate 24 on the side rails 04 and four larger holes for mounting the guide block 22 thereon.

Figure 8a shows a front view of base plate 24 of Fig. 8 depicting the mounting holes indicated in Fig. 8 above.

Figure 8b shows a top view of base plate 24 of Fig. 8 depicting the locations of the mounting holes indicated in Fig. 8 above.

Figure 9 shows a perspective view of guide plate 26 of device 20 of Fig. 5.

Figure 9a shows a front view of guide plate 26 of Fig. 9. The guide plate 26 has a substantially rectangular shape with pivoting end thereof with a rounded end having a through hole for passage of trunnion pin 30 therethrough.

Figure 9b shows a side view of guide plate 26 of Fig. 9 having a rectangular section for attachment of the wedge 28 thereon, preferably by welding.

Figure 9c shows a top view of guide plate 26 of Fig. 9.

Figure 10 shows perspective view of tapered wedge 28 of device 20 of Fig. 5. It has a flat face for attachment to the guide plate 26, a second flat face for stopping the trolley T from reversing on the conveyor 12 and a third tapered flat face with rounded tip to facilitate easy sliding thereof on top plate 08 of the trolley T and to prevent the trolley T from reversing on the conveyor whenever required, e.g. during the connecting rod torqueing operation.

Figure 10a shows a front view of tapered wedge 28 of Fig. 10 depicting the substantially triangular side with the rounded tip formed thereon.

Figure 10b shows a side view of tapered wedge 28 of Fig. 10 depicting the tapered face thereof.
Figure 10c shows a top view of tapered wedge 28 of Fig. 10.

Figure 11 shows a perspective view of trunnion pin 30 of device 20 of Fig. 5.

Figure 11a shows a front view of trunnion pin 30 of Fig. 11 depicting the head made at one end thereof and threads made at the other end thereof. The middle potion of the trunnion pin 30 is made smooth for easy rotation thereof in the hole in the guide block 22 for pivoting of the guide plate 26 on pin 30.

Figure 11b shows a side view of trunnion pin 30 of Fig. 11 depicting the flattened head made thereon for tightening the trunnion pin 30 on the guide block 22 of the device 30.

WORKING OF THE INVENTION

In Figure 3, from the conventional arrangement of the engine loaded trolley T which is locked on conveyor 12 by means of a spring lock mechanism 16 for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of engine trolley T, it is evident that there is an unavoidable play P in the spring lock mechanism 16 due to the construction thereof. The play P is generated due to the operation of spring lock 16 mechanism in an arc.

Figure 5 shows the detail assembled view of the device 20 for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of engine trolley T. The guide block 22 guides the assembly of the tapered wedge 28 with the guide plate 26 for arresting the reverse motion of engine trolley T merely by using the force of gravity and without any other source of energy. The guide plate 26 is assembled to the trunnion pin 30 for swiveling thereabout to raise and lower the assembly of tapered wedge 28 with the guide plate 26. The complete structure is mounted on base plate 22. The tapered wedge 28 is configured to be guided through engine trolley T for locking it without using any external force. The reverse motion arrestor device 20 shown in Fig. 4 eliminates the problems faced by manual lock or spring lock mechanism 16 shown in Fig. 3 by virtue of its improved, yet simple construction. This reverse motion arrestor device 20 eliminates non-value adding (NVA) time of the operator, which also causes substantial operator’s fatigue and leads to the generation of play P at engine trolley T locking site.
Therefore, the device 20 is capable of arresting engine trolley T in a fixed position successfully, automatically and quite easily. This way device 20 facilitates in precisely and properly applying torque to the connecting rod cap by means of the torqueing machine. Accordingly, the reverse motion trolley arrestor device 20 is used on the conveyor 12 at the stage of applying torque to the connecting rod on the assembly line. The device 20 is used at the stage of applying torque to the connecting rod cap in a machine therefor, in which the engine trolley T is required to be precisely located. The engine 02 is to be located and positioned for applying torque to the bolt on the conveyor 12. The engine 02 is mounted on the top plate 08 for fixing the engine trolley T during tumbling on a tumbler at the next stage. The top plate 08 is guided in the guide conveyor 10 on which the reverse trolley motion arrestor device 20 is mounted. The width of the rims of top plate 08 is used for sliding tapered wedge 28 thereon. The reverse motion trolley arrestor device 20 mechanically slides on the rim and lowers by gravity when the engine 02 has passed the top plate 08. The location of the arrestor device 20 is fixed such that the wedge assembly falls down and the flat face of the guide plate 26 comes in contact with the top plate 08 immediately, when the top plate 08 touches the vertical stopper 14 on the conveyor 12. Due to this perfect positioning of the engine 02, there is no need to manually locate the engine 02 and the intended object of the device 20 is achieved by the simple and low-cost construction thereof.

Although, the device 20 is shown here to be used for arresting the reverse motion (i.e. opposite to direction A of the trolley movement) of the engine trolley T on the conveyor 12, such trolley arresting device 20 can also be used at various other applications requiring locating the trolley properly and accurately at any desired location to avoid the play occurring between the trolley and the locking device.
TECHNICAL ADVANTAGES AND ECONOMIC SIGNIFICANCE

The system for arresting the reverse motion of the engine trolleys used in automobile manufacturing plants configured in accordance with the present invention has the following technical and economic advantages:
• Operates automatically to avoid locking/unlocking thus saves time of about 4 seconds per engine.

• Holds the engine trolley in a fixed position to impart complete motion seizure thereof.

• Low-cost, e.g. costs as low as INR 450 due to the use of easily available and low-cost material.

• Robust however simple construction, offers longer service life.

• Can be easily installed and operate, so minimal chances of failure.

• Offers excellent repeatability with precision.

• Low-maintenance.

• Can be made in-house.

• Requires no special machinery to manufacture it.

The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept.

Therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

The description provided herein is purely by way of example and illustration. The various features and advantageous details are explained with reference to this non-limiting embodiment in the above description in accordance with the present invention.

The descriptions of well-known components and manufacturing and processing techniques are consciously omitted in this specification, so as not to unnecessarily obscure the specification. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.

Therefore, while the embodiments herein have been described in terms of preferred embodiments, the skilled person will recognize that the embodiments herein can be practiced with modification within the spirit and scope of embodiments described herein.

The skilled person can easily make innumerable changes, variations, modifications, alterations and/or integrations in terms of materials and method used to configure, manufacture and assemble various constituents, components, subassemblies, assemblies and in terms of the size, shapes, orientations and interrelationships without departing from the scope and spirit of the present invention.

The numerical values given of various physical parameters, dimensions and quantities are only approximate values and it is envisaged that the values higher or lower than the numerical value assigned to the physical parameters, dimensions and quantities fall within the scope of the disclosure unless there is a statement in the specification to the contrary. ,CLAIMS:We claim:

1. A device (20) for arresting the reverse motion of a trolley (T) carrying a heavy component such as an automotive engine (02) securely mounted on the top plate (08) thereof, said engine-loaded trolley (T) guided between two side rails (04) of the conveyor guide (10) of a conveyor (12) provided with a vertical stopper (14) thereon fixed between said side rails (04); said device (20) comprising:

• a guide block (22) supported on a base plate (24);

• said guide block (22) having a wedge assembly pivoted thereon;

• said wedge assembly pivoted on said guide block (22) by means of a trunnion pin (30) to float up and down; and

• said base plate (24) fixed on at least one of said side rails (04) of said conveyor guide (10) of said trolley (T) by means of a plurality of fasteners (06) for rigidly mounting said device (20) on said rail (04);

wherein said device (20) is located and fixed on said side rail (04) such that said top plate (08) loaded with said engine (02) is guided between said rails (04) and said wedge assembly slides on top of said top plate (08) while moving forward, and on said top plate (08) front end hitting said vertical stopper (14), said wedge assembly drops down by gravity to securely arrest said trolley (T) between said vertical stopper (14) and said device (20).

2. Device as claimed in claim 1, wherein said device is mounted on said rail (04) with the tip of said wedge assembly facing said incoming engine-loaded trolley (T).

3. Device as claimed in claim 1, wherein said base plate (24) is mounted on said rail (04) by means of a plurality of fasteners (06).

4. Device as claimed in claim 1, wherein said wedge assembly comprises a guide plate (26) and a wedge (28) attached thereto.
5. Device as claimed in claim 3, wherein said wedge (28) comprises a flat face to be attached to said guide plate (26) and a tapered surface extending downwards from the tip of said wedge (28) facing said incoming engine-loaded trolley (T).

6. Device as claimed in claim 4, wherein said guide plate (26) is loosely pivoted on said trunnion pin (30) locked between the said walls of said guide block (22) and pivotable about said trunnion (30) in a vertical plane.

7. A system for arresting the reverse motion of a trolley (T) carrying a heavy component such as an automotive engine (02); said system comprising:

• a conveyor (12) with a vertical stopper (14) centrally disposed thereon at the forward end thereof;

• a conveyor guide (10) having two side rails (04) spaced apart and disposed on said conveyor (12);

• a trolley (T) securely mounted on the top plate (08) thereof with a heavy component like an automotive engine (02);

• said trolley (T) guided between said side rails (04); and

• a device (20) for arresting the reverse motion of said trolley (T) on said conveyor (12);

wherein said device is located and fixed on one of said side rails (04) to guide said trolley (T) between said rails (04) such that said wedge assembly slides on top of said trop plate (08) of said trolley (T) while moving forward, and on the front end of said top plate (08) hitting said vertical stopper (14), said wedge assembly drops down by gravity to securely arrest said trolley (T) between said vertical stopper (14) and said device (20).

8. System as claimed in claim 7, wherein said device (20) comprises:

• a guide block (22) supported on a base plate (24);
• said guide block (22) fitted with a wedge assembly pivotable thereon; said wedge assembly having a guide plate (26) and a tapered wedge (28) securely attached to said guide plate (26);

• said guide plate (26) pivoted on said guide block (22) by means of a transverse trunnion pin (30) fixed between side walls of said guide block (22); and

• said base plate (24) fixed on one of said rails (04) by means of a plurality of fasteners (06);

wherein said device (20) is located and fixed on said side rail (04) to guide said trolley (T) on said conveyor (12) to facilitate the sliding of said tapered wedge (28) on top of said top plate (08) during a forward movement of said trolley (T), and to arrest said trolley between said tapered wedge (28) and said vertical stopped (14) by dropping down of said tapered wedge (28) by gravity through the front of said top plate (08) hitting said vertical stopper (14).

9. System as claimed in claim 8, wherein said device (20) is mounted on said rail (04) with the tip of said tapered wedge (28) facing said incoming engine-loaded trolley (T).

10. System as claimed in claim 9, wherein said tapered wedge (28) comprises a flat face to be attached to said guide plate (26) and a tapered surface extending downwards from the tip of said tapered wedge (28) facing said incoming engine-loaded trolley (T).

11. System as claimed in claim 9, wherein said guide plate (26) is loosely pivoted on said trunnion pin (30) locked between the walls of said guide block (22) and pivotable about said trunnion (30) in a vertical plane.

12. System as claimed in claim 9, wherein said base plate (24) is mounted on said rail (04) by means of a plurality of fasteners (06).

Digitally Signed.

Dated: this 05th day of March 2018. (SANJAY KESHARWANI)
APPLICANT’S PATENT AGENT