Coin Sorter For Indian Coins 2004-2005 ACKNOWLEDGEMENT Firstly, I am very grateful to this esteemed institution “Golden Valley Institute of Technology” for providing me an opportunity to pursue my degree course. I express my sincere thanks to my Principal Dr.U.N.Kempaiah for providing me with adequate facilities to undertake this seminar. I would also like to take this opportunity to express my gratitude for the support and guidance extended to me by the faculty members of the Mechanical Engineering Department. I would like to thank H.O.D of Mechanical Engineering Department Mr. D.SRINIVASA RAO for providing me an opportunity and for his invaluable support. My deep and profound gratitude to my internal guide Dr.U.N.Kempaiah, for his keen interest and boundless encouragement. Finally, I would thank all my friends who have helped me directly or indirectly in this seminar. Department Of Mechanical Engg. , G.V.I.T. 1
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Coin Sorter For Indian Coins 2004-2005
ACKNOWLEDGEMENT
Firstly, I am very grateful to this esteemed institution
“Golden Valley Institute of Technology” for providing
me an opportunity to pursue my degree course.
I express my sincere thanks to my Principal
Dr.U.N.Kempaiah for providing me with adequate facilities
to undertake this seminar.
I would also like to take this opportunity to express my
gratitude for the support and guidance extended to me by
the faculty members of the Mechanical Engineering
Department. I would like to thank H.O.D of Mechanical
Engineering Department Mr. D.SRINIVASA RAO for
providing me an opportunity and for his invaluable support.
My deep and profound gratitude to my internal guide
Dr.U.N.Kempaiah, for his keen interest and boundless
encouragement.
Finally, I would thank all my friends who have helped
me directly or indirectly in this seminar.
Department Of Mechanical Engg. , G.V.I.T. 1
Coin Sorter For Indian Coins 2004-2005
CONTENTS
CHAPTER PAGE NO.
1. INTRODUCTION 1
2. STUDY OF COIN PARAMETERS 2
3. POSSIBLE SOLUTIONS 10
4. COIN FEEDING 13
5. MECHANISM 15
6. COIN SORTERS 31
7. CONCLUSION 33
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INTRODUCTION
Counting of coins is a tedious task when coin collections are large. Say for
example, in Banks, Temples, bus depots, shops, etc., they are spending a lot of time and
strain for counting their collections. Usually the method they are adopting is first to
separate the coins in each denomination and then count the total in each denomination.
Finally the totals of each denomination are added to get the grand total. From this we can
understand that separating into denominations is a tedious work. So it will be very much
helpful to them if a device can be used to separate the coins in denominations. It will be
relatively easier to attach provisions for automatic counting once the coins are separated.
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Chapter 2
STATISTICAL STUDY OF COIN PARAMETERS
For a systematic approach, the coin parameters which may help to sort out the coins into
different denominations are to be identified and their values to be measured.
2.1 COINS AND THEIR PARAMETERS
The following four parameters were considered for sorting of the coins:
Diameter/distance
Thickness
Weight
Magnetic property
2.1.1 Diameter/distance
If the shape of the coin is circular then its diameter itself is the parameter. But all
the coins are not circular in shape so in case of coins which are not circular in shape,
‘distance’ is considered as the parameter. The term distance refers to either corner to
corner distance or flat to flat distance. For example as shown in figure1 for a 5 paise coin
which is square in shape, ‘d1’ is the corner to corner to distance while ‘d’ is the flat to flat
distance. The distance parameter for 10 paise, 20 paise and 100 paise coins are as shown
in the figure 1. The value of diameter/distance of each of the coins is noted in table 1.
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Coin Sorter For Indian Coins 2004-2005
Table 1
The Values of the different parameters of the coins
Hence, the deflection of the spring for the 50 paisa [small] coin is 2.98 cms.
The spring housing is so designed such that the 5 paise coin falls out through the hole
provided in to housing, while 50 Paisa coin falls in side the housing.
The spring is fixed to the housing with the help of two rivets; the housing is fixed to the
coin guide with the help of a clamp. The details of the spring and housing are shown in
the fig 11.
5.1.5 Connecting [Vertical] shaft
The shaft made of mild steel. The details of the shaft shown in the fig. 12.
5.1.6 Coin Guide
The coin guides are made of sheet-metal they are hollow cylindrical pipes. Flattened at
the ends, and stuck to the template holes at the bottom using araldite. PVC tubes are
inserted into the guides to lead the coins in to their respective collectors.
5.1.7 Coin collector
These are square boxes of mild steel, inserted into their holders which are welded to the
horizontal plate fixed to the frame.
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5.2 FEEDING MECHANISM
(a) Rotating feed plate
(b) Fixed feed plate
(c) Feed driving shaft
(d) Feeding Chute
(e) Guiding Funnel
5.2.1 Rotating feed plate
It is a 1.5mm thick round plate made out of aluminum alloy, and as 10 equi-
spaced holes on a 180 mm P.C.D. The holes have diameter of 32mm in order to provide
space for the maximum coin size. A hole can contain one coin at a time. The holes carry
the coin to the top where it falls down into the guiding funnel or into the 200 paise, 500
paisa slots depending on their diameter. At the center of the rotating feed plate, there is a
small hole of 11.2mm diameter through which the threaded end of the feed driving shaft
inserted and fixed by means of a nut. It also contains four holes of 5mm diameter on
30.5mm P.C.D., to fix the boss on to it.
5.2.2 Fixed Feed Plate
It is a 4mm thick aluminum plate fixed to the frame which is supported on stand.
It has three holes 26.3mm, 28mm and 32mm on a 180mm P.C.D. as shown in the fig 14.
The center of the plate has a hole through which the feed driving shaft rotates. There are
four counter sunk holes on a 55.5mm p.c.d to fixed the boss on to it.
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5.2.3 Feed Driving Shaft
The Feed driving shaft is made of mild steel the details of which are shown in fig
12.
5.2.4 Feeding Chute
It is one of the important parts of the coin sorter. A pipe of 35mm diameter is cut
at 30 degree to the vertical and joined to from an elbow pipes. One end of the elbow pipe
is flattened and the rectangular hopper is inserted into it, and welded. The circular end of
elbow rests just above the rotating feed plate. The coins fed into the funnel get stacked
one above in the elbow, and are continuously picked-up by the rotating plate. The funnel
is fixed to the inclined frame with the help of L shaped, strip welded to it, and an
adjustable mechanism, to alter the clearance between the rotating feed plate and the
funnel to the desired level [fig 16]
5.2.5 Guiding Funnel
The coins falling one by one from the feeding system have to be taken to the hole
of the rotating arm of the separating system. This is the function of the guiding funnel.
Coins fall in to the guiding funnel due to gravity from the hole of fixed plate. The coins
slide down the guide guiding funnel and reach the rotating arm. When a hole of the
rotating arm comes below the coin it picks up the coin and carries it over the template for
sensing the coin denomination.
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DESCRIPTION OF THE PARTS IN THE GROUP ASSEMBLY DRAWING
NO. ON DRAWING
QUANTITY DESCRIPTION
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
1
4
1
1
1
1
4
1
4
1
1
1
1
1
1
1
1
1
1
1
1
Funnel
Screw “MS”
Boss [Rotating Feed Plate]
Rotating Feed Plate
Stationary Feed Plate
Boss [Fixed Feed Plate]
Screw “MS”
Feed driving Shaft
Bevel Gears
Guiding Funnel
Boss [Rotating Arm]
Rotating Arm
Template
Boss [Template]
Angle Plate
Connecting [Vertical] Shaft
Leaf Spring and Housing
Driving Shaft
Driving Shaft Housing
Connecting [Vertical] Shaft House
Hand Wheel
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1)
Speed: 2000 coins per minute Coin off-sort bagging attachment Easy to read LED display User friendly controls Hopper capacity: 4,000 coins Weight: 28 lbs. Power: AC 100/120w
2)
• Speed: 3500 coins per minute• Hopper capacity: 10,000 coins• Weight: 36 lbs.• Power: AC 100/120w
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3)
• Speed: 1800 coins per minute• Hopper capacity: 2,000 coins• Weight: 19 lbs.• Power: AC 100/120w
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CONCLUSION As we know that counting of coins can be a tedious job when coin collections are large in places like temples, bus stands, shops, or even in banks. The coin sorting machine can be of great help to these sectors.
Once coins are separated by using this coin sorting machine the different coins can be counted and finally the totals of each coin can be added with their values to get the grand total sum.
So, it will be very much helpful to them if a device can be used to separate the coins in different denominations, and these sector people can save their time and labour as well.