JP2590815Y2 - Coin polishing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coin grinding machine for grinding coins such as game medals.

[0002]

2. Description of the Related Art Conventionally, as shown in Japanese Utility Model Application Laid-Open No. 60-109755 and Japanese Utility Model Application Laid-Open No. 64-28684, polishing is performed while stirring and mixing a coin grinding pellet and a coin. 2. Description of the Related Art There is known a coin polishing machine that separates only polished coins and discharges polished coins.

In this type of coin grinder, dirt attached to the coin is scraped off by contact between the coin and the pellet. Therefore, dirt adheres to the pellets used for a certain period of time, and if they are used as they are, the efficiency of coin polishing decreases. Therefore, as shown in FIG.
02 is provided with a recovery port 103, from which dirty pellets are recovered at an appropriate timing, and the pellets are washed or new pellets are replenished.

[0004]

By the way, inside the coin polishing machine 101, as shown in FIG. 5, the coin and the pellet are in a mixed state. For this reason, a mesh plate 107 having a large number of small holes 105 is attached above the collection port 103 so that only the pellets fall into the collection port 103 and coins are not caught by the mesh plate 107 and fall. .

[0005] However, in the coin polishing machine 101, if the coins are placed on the mesh plate 107 and close the small holes 105, the pellets cannot be dropped any more, so that the pellets cannot be sufficiently removed. Therefore, an object of the present invention is to provide a coin polishing machine capable of collecting only polishing pellets sufficiently and easily.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a tank in which pellets for coin polishing and coins are put, and a pellet and coins supplied from the tank are introduced from the inlet side. A polishing cylinder that is stirred and mixed and conveyed to the outlet side while polishing the coin, a discharge port formed on the exit side of the polishing cylinder, where both the pellets and the coin overflow, and overflowed from the discharge port. In a coin polishing machine provided with a coin discharge path for separating the pellets from the pellets and returning the pellets to the tank and returning only the coins to the discharge port, the discharge port is substantially connected to the discharge port at the outlet side of the polishing cylinder.
A second discharge port formed at approximately the same height position and overflowing only the pellets, and a pellet overflowing from the second discharge port being returned and supplying the pellets to the inlet side of the polishing cylinder. 2 tanks.

[0007]

According to the coin polisher of the present invention, the outlet side of the polishing cylinder from which the polished coin comes out has a second outlet in which only the pellet overflows, in addition to the discharge outlet in which both the pellet and the coin overflow. Outlet is formed. The pellets overflowing from the second discharge port are returned to the second tank provided exclusively. Therefore, only the pellets can be easily collected from the second tank. Also, the second
Only the pellets overflow from the outlet of
The density of the pellet discharged from the outlet side
The pellets collect and stop coming out. for that reason,
Smooth coin even if the outlet for coin ejection is small
Coins and pellets are ejected
Is also very easy to separate. Moreover, the second outlet
Is almost the same as the coin ejection outlet on the outlet side of the polishing cylinder
Since it is formed at the height position, pellets can be
Is not released in advance. Accordingly
Inside the polishing cylinder,
It does not mean that the density of the slabs will only drop.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the coin grinding machine 1 has a first grinding machine in which both a coin grinding pellet and a coin are inserted.
, A second tank 5 containing only pellets, a polishing cylinder 9 for transporting pellets and coins introduced from both tanks 3 and 5 upward while stirring and mixing with a conveyor screw 7, A separation cylinder 11 for introducing the pellets and coins overflowing from the cylinder 9 and sifting only the pellets into the tank 3, and an outlet 13 for discharging coins coming out of the separation cylinder 11 are provided.

Next, regarding these structures and their functions,
This will be described in more detail along the flow of pellets and coins. In the first tank 3, a coin supply port 21 is formed. As shown in FIG. 2, behind the coin supply port 21, a hopper 23 into which dirty coins are inserted, and a belt conveyor 25 for feeding coins in the hopper 23 are provided.
A motor 27 for driving the belt conveyor 25;
And a chute 29 for guiding dirty coins into the tank 3. When coins are put in the tank 3, the coins mix with the pellets previously put in the tank 3.

On the other hand, the second tank 5 contains only pellets. As shown in FIG. 1, a supply port 31 having an openable / closable chute cover 30 is provided above the second tank 5, from which pellets can be newly supplied. Further, below the second tank 5, a collection port 33 closed by an openable and closable shutter 32 is provided, from which the pellets in the tank 5 can be collected.

The polishing cylinder 9 is a cylindrical body erected between the first tank 3 and the second tank 5. As shown in FIG. 3, half of the outer peripheral surface of the polishing cylinder 9 is exposed in the tank 3. The other half is exposed in the tank 5. The first tank 3 and the second tank 5 are separated by the polishing cylinder 9 and the partition wall 34, so that pellets and coins do not directly enter and exit between the two tanks 3,5. If there is sufficient height so that pellets and medals do not come and go directly, there is no problem even if the tanks 3 and 5 are connected at the upper end portions of the polishing cylinder 9 and the partition wall 34. As shown in FIG. 4A, a pellet inlet 35 for introducing pellets into the polishing cylinder 9 and a pellet discharge port for discharging pellets in the polishing cylinder 9 are provided on the tank 5 side of the polishing cylinder 9. An outlet 37 is formed. The pellet introduction port 35 and the pellet discharge port 37 are sized so that only pellets can pass and coins cannot pass. On the other hand, on the tank 3 side of the polishing cylinder 9, as shown in FIG. 4B, a coin introduction port 39 for introducing pellets and coins into the polishing cylinder 9, and a pellet and a coin in the polishing cylinder 9 are inserted. A coin discharge port 41 for discharging is formed. The coin inlet 39 and the coin outlet 41 are sized to pass both pellets and coins. Both inlets 35, 39
Are formed at the lowermost part of the polishing cylinder 9 and both discharge ports 3
7 and 41 are formed at almost the same height position on the upper portion of the polishing cylinder 9.

The bottom surface of the first tank 3 is inclined so as to descend toward the polishing cylinder 9 as shown in FIG. Therefore, the pellets and coins in the tank 3 gather at the coin introduction port 39 by their own weight and enter the polishing cylinder 9. Also, since the bottom surface of the second tank 5 is similarly inclined,
The pellets in the tank 5 also gather at the pellet inlet 35 by their own weight and enter the polishing cylinder 9.

The conveyor screw 7 disposed in the polishing cylinder 9 has a motor 45 through a chain 43 at the lower end.
, And rotated by the driving force of the motor 45.
When the conveyor screw 7 rotates, the pellets and coins that have entered through the above-described pellet introduction ports 35 and 39 are transported above the polishing cylinder 9, and the pellets and coins successively enter through the pellet introduction ports 35 and 39. In the polishing cylinder 9, the pellets and coins are conveyed while being stirred and mixed,
The dirt attached to the coin is scraped off by the contact between them.

When the pellets and coins reach the upper part of the polishing cylinder 9, only the pellets overflow from the above-described pellet discharge port 37, and both the pellets and the coin overflow from the coin discharge port 41. Since the coins and the pellets sufficiently overflow from the pellet discharge port 37 and the coin discharge port 41, they do not overflow from the opening at the upper end of the polishing cylinder 9.

The pellets overflowing from the pellet discharge port 37 spill into the second tank 5 as they are. The spilled pellets enter the polishing cylinder 9 again through the pellet inlet 35 and are used for polishing many times. In the embodiment, about half of the pellets conveyed above the polishing cylinder 9 overflows from the pellet discharge port 37.

On the other hand, the pellets and coins overflowing from the coin discharge port 41 enter the separation cylinder 11. The separation cylinder 11 is a cylindrical body disposed laterally above the inside of the tank 3, one end of which faces the coin discharge port 41, and the other end is exposed outside the second tank 5. . Also, the separation tube 11
A large number of small holes 47 sized so that only the pellets pass through but no coins pass through are formed on the wall surface. The separation cylinder 11 is rotated by a motor (not shown), and the pellets and coins entering from one end of the separation cylinder 11 are stirred. At this time, only the pellets spill out into the tank 3 from the many small holes 47, and only coins remain in the separation cylinder 11. In addition, the separation cylinder 11 and the polishing cylinder 9 are arranged with an interval of about 5 mm, and the pellets spill out from this gap. The pellets thus spilled again enter the polishing cylinder 9 from the coin introduction port 39 and are used for polishing many times.

The coins separated from the pellets and left in the separation tube 11 are pushed out from one end of the separation tube 11 by coins supplied one after another, and fall down from the other end. The spilled coin is guided to the discharge port 13 on the chute 49 and discharged from the discharge port 13 to the outside.

In the coin polishing machine 1 configured as described above, since only the pellets are always stored in the second tank 5, only the pellets can be collected very easily by opening the collection port 33. Therefore, there is no time and effort required for cleaning and replacing dirty pellets. In the embodiment, about half of the total amount of pellets can be collected at a time. However, even if the pellets are washed or replaced half by one, the polishing ability of the coin polishing machine 1 can be sufficiently maintained.

In the coin polishing machine 1 of the embodiment, since about half of the pellets overflow to the tank 5 side through the pellet discharge port 37, the density of the pellets decreases near the coin discharge port 41, and the small coin discharge port Even with 41, coins can be discharged smoothly. In addition, the separation cylinder 11 only needs to separate the remaining half amount of pellets, so that the pellets can be separated more efficiently than in the conventional case. Even if the separation cylinder 11 is compact, the pellets can be sufficiently separated. Therefore, as the separation cylinder 11 is made compact, the coin grinding machine 1 as a whole becomes more compact, and the space required for installation may be narrower.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the gist of the present invention.

[0021]

As described above, according to the coin polishing machine of the present invention, only the pellets are circulated by the second tank, so that only the polishing pellets can be collected sufficiently and easily. Therefore, the work for cleaning and exchanging the pellets becomes extremely easy.

Further, since the outlet for overflowing only the pellets is provided, the density of the pellets decreases near the coin outlet, so that the pellets do not come out. As a result, coins can be smoothly ejected even from a small coin outlet. In addition, the separation between the coin and the pellet has become extremely easy. Moreover, the second outlet is
Almost the same height as the coin outlet at the outlet of the polishing cylinder
Position in the polishing cylinder during polishing.
Only the density of the pellet decreases
It does not cause the problem.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a coin grinder according to an embodiment.

FIG. 2 is a partial side sectional view of a coin supply mechanism on the back side of the coin grinder according to the embodiment.

FIG. 3 is a partial plan sectional view schematically showing a positional relationship between two tanks and a polishing cylinder.

4A and 4B show the outer peripheral surface of the polishing cylinder of the embodiment, wherein FIG. 4A is a left side view thereof, and FIG. 4B is a right side view thereof.

FIG. 5 is a sectional view showing a pellet collecting port of a conventional coin grinder.

[Explanation of symbols]

1 ... Coin polishing machine, 3 ... First tank, 5 ...
· Second tank, 7 ··· Conveyor screw, 9 ···
Polishing cylinder, 11 Separation cylinder, 13 Outlet, 21
... Coin supply port, 23 ... Hopper, 25 ...
Belt conveyor, 27, 45 ... motor, 29, 49
... Shoot, 30 ... Shot and lid, 31 ...
・ Supply port, 32 ・ ・ ・ Shutter, 33 ・ ・ ・ Collection port, 3
4 ... partition wall, 35 ... pellet inlet, 37 ...
Pellet discharge port, 39 ... coin introduction port, 41 ...
Coin outlet, 43 ... chain, 47 ... small hole.

Claims (1)

(57) [Scope of request for utility model registration] 1. A tank in which pellets and coins for coin polishing are put, and a pellet and coins supplied from the tank are introduced from an inlet side, and are agitated and mixed and conveyed to an outlet side while polishing the coins. A polishing cylinder, a discharge port formed on the outlet side of the polishing cylinder, from which both the pellets and the coin overflow, and a coin separated while returning the pellet from the pellet and the coin overflowing from the discharge port to the tank. And a coin discharge path for guiding only the pellets to a discharge port. A second discharge port formed at the outlet side of the polishing cylinder at substantially the same height as the discharge port, and overflowing only the pellets. And a second tank for returning the pellets overflowing from the second discharge port and supplying the pellets to the inlet side of the polishing cylinder.