JPH10307956A - Commodity heating device for automatic vending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the local heating at a joint of a can barrel part and to prevent the puncture of the can barrel part by increasing the length of a heating coil which is wound like a race track to perform the induction heating of a commodity in comparison with the length of the commodity. SOLUTION: A nonmetallic holder 3 is prepared to hold a metallic commodity 2 containing a drink in its fallen attitude while it's carried to a commodity take-out port from a commodity store shelf together with a driving device 5 which rotates the commodity 2 on the holder 3, and an induction coil 4 which is wound like a race track to perform the induction heating of the commodity 2. In such a constitution, the length of the coil 4 is increased compared with the can length of the commodity 2. Thereby, the current induced to the can of the commodity 2 from the coil 4 is branched up to the full length of the can via a can barrel joint 2a if existing right under the coil 4. As a result, the power application density is lowered as long as the same electric power is applied and accordingly the local heating can be suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a product storage shelf for storing a product in which a beverage is sealed in a metal can and receives and holds the product taken out in accordance with a sales instruction to a product take-out port in an inverted position. Then, the present invention relates to a product heating device of a vending machine which is heated by induction and carried out to a product outlet.

[0002]

2. Description of the Related Art As a product heating device described above, a product carried out of a product storage shelf is received by a nonmetallic receiving stand, received and held in an inverted position, and is driven by an induction coil installed on the lower surface of the receiving stand. Japanese Patent Application Laid-Open No. 2-19993 discloses a technique in which a high-frequency current is applied to heat a can of a product using an electromagnetic induction phenomenon to heat a beverage enclosed therein by heat conduction.

Japanese Patent Application Laid-Open No. 2-19994 discloses a method in which a drive means for rotating a product is provided on the receiving table, and the product is rotated during induction heating to improve the heat transfer from the can to the contents of the beverage. It is. The induction coil is wound along the outer periphery of the body of the product, shorter than the length of the product in the longitudinal direction, so that local heating does not occur at the boundary between the can body and the can lid.

[0004]

By the way, in the conventional construction, a body seam formed by folding and crimping a can material on the can body in addition to the seam between the can body and the can lid, such as coffee, is used. Since there is a certain can and the electric resistance of the trunk joint is higher than that of the other part, local heating here becomes a problem, and as a result, unexpected trouble such as puncture of the can itself may occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a vending machine which suppresses local heating at a body joint and eliminates puncture at a can body. An object of the present invention is to provide a product heating device.

[0006]

According to a first aspect of the present invention, there is provided an apparatus for storing a product delivered in accordance with a sales instruction from a product storage rack for storing a product in which a beverage is sealed in a metal can. A non-metallic pedestal for receiving the product in an inverted position while being transported to the product outlet, a driving device for rotating the product on the pedestal, and a heating coil wound in a race track shape for induction heating the product; , The length of the heating coil is longer than the length of the product.

With the above configuration, since the induction coil is longer than the length of the can of the product, the current induced in the can by the induction coil 4A has the trunk joint 2a immediately below the induction coil 4A as shown in FIG. 4 (b). In this case, the current induced in the can in the case of the induction coil 4B which shunts and spreads over the can length to the full length of the can at the body seam 2a as a boundary (FIG. 4)
(Refer to (d)), the power input density becomes lower when the same power is input, and local heating can be suppressed.

Although the above description has been given of the case where the induction coil hits directly below the trunk seam, the current of the induction coil 4A is also taken for the induction coil 4A which is longer than the can when heating the position off the trunk seam. In the case of the induction coil 4B whose heating area is shorter than the can length, the current in the opposite direction of the current spreads to the full can length and spreads as compared with the current induced in the can.

Further, as in the second aspect of the present invention, in the commodity heating apparatus for a vending machine according to the first aspect, the heating coil can be divided and provided along the outer periphery of the commodity. Further, as in the third aspect of the present invention, in the commodity heating apparatus for a vending machine according to the second aspect, the heating coil divided into a plurality of parts has a configuration in which the adjacent heating coils have opposite polarities and the adjacent heating coils have the opposite polarity. Currents flowing in adjacent windings can be in the same direction.

According to the configuration of the second and third aspects, as seen when the current flowing in the adjacent winding of the adjacent heating coil in FIG. As shown by the arrow, the magnetic flux is sharply bent between the matching windings, and the magnetic flux generated by the adjacent induction coil concentrates on that portion to cause local heating. However, as shown in FIG. If the currents flowing in the adjacent windings of the heating coil are in the same direction, the magnetic flux will not converge between the adjacent windings as shown by the arrows, and will go around the adjacent windings. The current flowing in the can directly below flows as if copying the current of the induction coil and spreads uniformly on the can surface, eliminating local heating and making it possible to reduce the power density for the same input power.

According to a fourth aspect of the present invention, in the commodity heating apparatus for a vending machine according to the second or third aspect, the heating coil divided into a plurality of units includes at least one set of parallel circuits. Can be connected. With the above configuration, as shown in FIG. 6, the mutual impedance M ₁ between the induction coil and the can directly below the torso seam is smaller than the mutual impedance M ₂ between the induction coil and the can that deviate from immediately below the torso seam. small becomes a result, the impedance of the induction coil that strikes directly below the barrel seams increases, the coil current I ₁ decreases as compared with the current I ₂ of the other induction coils are deviated from just below the can seam connected in parallel As a result, the input power is reduced, the degree of heating of the can seam is lower than that of other parts, and it becomes possible to suppress local heating of the seam joint.

Further, as in the invention according to claim 5, in the commodity heating apparatus for a can commodity vending machine according to any one of claims 1 to 4, the heating coil can be wound in a distributed manner. According to the above configuration, the current induced in the can flows as if the current of the induction coil was copied. Therefore, in the distributed winding shown in FIG. 7A in which the area of the induction coil facing the can was increased, the current induced in the can was induced. As compared with the case where the area becomes large against the coil and the area of the can against the induction coil is reduced by concentrated winding as shown in FIG. Concentration on the joint between the can body and the can lid is reduced, and local heating can be suppressed.

According to a sixth aspect of the present invention, in the commodity heating apparatus for a vending machine according to any one of the first to fifth aspects, the gap between the heating coil and the commodity is set in the longitudinal direction of the commodity. The vicinity of the end can be made larger than the center. According to the above configuration, the concentration of the current induced in the can on the can lid can be reduced, so that local heating of the can lid can be suppressed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing a main part of an embodiment of the present invention. In FIG. 1, a product heating device 1
Is an inverted posture in the middle of transporting the product 2 carried out in accordance with the sales instruction from a product storage shelf (not shown) for storing the product 2 in which a beverage is sealed in a metal can to a product outlet (not shown). And a drive device 5 for rotating the product 2 on the support 3 and a heating coil 4 wound in a race track shape for induction heating the product 2. . The product 2 has a body seam 2a in which a plate constituting a cylindrical portion of a can is formed into a cylindrical shape, and is overlapped and caulked, and a lid seam 2b in which lids are caulked at both ends of the cylindrical portion.

The product 2 carried out according to the sales command from the product storage shelf (not shown) in the above configuration is transported to the product take-out port (not shown) in a non-metallic receiving stand in an inverted posture. While being rotated by being driven by the driving device 5 and being received by the induction coil 3, it is heated to a predetermined temperature by the induction coil 4, and is conveyed to a product outlet (not shown). FIG. 2 shows a configuration diagram of a main part of another embodiment of the present invention. In FIG. 2, the product heating device 10 removes a product 2 carried out from a product storage shelf (not shown) in accordance with a sales command, through a product outlet (not shown).
A non-metallic receiving table 3 for receiving the product 2 in an inverted position while being transported, a driving device 5 for rotating the product 2 on the receiving table 3,
Heating coils 41 and 42 wound in a race track shape for induction heating the product 2 are provided. The product 2 has a body seam 2a in which a plate constituting a cylindrical portion of a can is formed into a cylindrical shape, and is overlapped and caulked, and a lid seam 2b in which lids are caulked at both ends of the cylindrical portion.

FIG. 2 differs from FIG. 1 in that one induction coil is divided into two induction coils. This 2
The induction coils 41 and 42 divided into bases may be connected in parallel so that they have opposite polarities. Adjacent induction coils 41, 4 when not connected in reverse polarity as shown in FIG.
When the current of the two adjacent windings is opposite between the adjacent windings, the magnetic flux is sharply bent as indicated by the arrow, and the magnetic flux generated by the adjacent induction coils 41 and 42 concentrates on that portion. Although local heating occurs, as shown in FIG. 5 (a), when currents flowing in the adjacent windings of the adjacent heating coils 41 and 42 are in the same direction, the magnetic flux between the adjacent windings is indicated by an arrow. Will flow around adjacent windings without concentrating, so that the current flowing through the can directly below the induction coils 41 and 42 flows as if copying the current of the induction coils 41 and 42 and spreads uniformly on the surface of the can. Local heating is eliminated, and the power density can be reduced for the same input power.

Further, the induction coil 4 divided into two units
1, 42 are connected in parallel. By this parallel connection, for example when one of the induction coil 41 is directly under the can body seam 2a, as compared to the mutual impedance M ₂ of the induction coil 42 and the cans off the right under the barrel seams 2a, mutual impedance M ₁ decreases resulting in the induction coil 41 and the can hit directly below the barrel seams 2a,
Since the impedance of the induction coil 41 impinging directly below the barrel seams 2a is increased, the coil current I ₁ as compared to the current I ₂ of the other induction coil 42 which is off the right under the barrel seams 2a connected in parallel reduction As a result, the input power is reduced, the degree of heating of the torso joint 2a is lower than that of other parts, and it becomes possible to suppress local heating of the torso joint 2a (see FIG. 6).

Further, as shown in FIG.
It is preferable to make the heating area as wide as possible by forming distributed windings 1 and 42. Still further, as shown in FIG. 3, the end of the induction heating coil 40 may be warped so that the gap with the product is widened in the longitudinal direction of the product.

[0019]

According to the present invention, the induction coil is made longer than the length of the product and the winding is distributed so that the heating surface area is enlarged and the input power density per unit area is lowered. Since the coils are divided and connected in parallel so that the adjacent heating coils have opposite polarities and heat generation around the body joint is suppressed, there is an effect of preventing puncturing of the can during heating.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention.

FIG. 2 is a configuration diagram of a main part of another embodiment of the present invention.

FIG. 3 is a configuration diagram of a main part of another embodiment of the present invention.

4A and 4B show a current induced in a can, FIG. 4A shows a positional relationship between an induction coil and a product when the length of the induction coil is longer than a product length, and FIG. 4B shows a current induced in the can in the case of FIG. (C) is a diagram showing the positional relationship between the induction coil and the product when the length is shorter than the product length of the induction coil, and (d) is a diagram showing the current induced in the can in the case (c).

5A and 5B show the relationship between the current direction of the windings of the divided induction coils and the magnetic flux linked to the can, and FIG. FIG. 4B is a diagram showing the relationship between the can and the magnetic flux when the current is set in the same direction. FIG. 4B shows the relationship between the can and the magnetic flux when the currents of the adjacent windings of the adjacent induction coils are set to the opposite polarity and the currents of the adjacent windings are reversed. Relationship diagram

FIG. 6 is a diagram showing the mutual impedance between the induction coil and the can and the current of each induction coil when one of the divided induction coils hits immediately below the trunk seam and the other deviates from immediately below the trunk seam.

7A and 7B show how to wind an induction coil, FIG. 7A shows a distribution winding, and FIG. 7B shows a concentrated winding.

[Explanation of symbols]

 1, 10 Commodity heating device 2 Commodity 2a Body joint 2b Lid joint 4, 40, 41, 42 Induction coil

Claims (6)

[Claims] 1. A non-metallic cradle for receiving a product taken out in accordance with a sales command from a product storage shelf for storing a product in which a beverage is enclosed in a metal can in an upside-down posture while transporting the product to a product outlet. And a driving device for rotating the product on the receiving table, and a heating device for a vending machine having a heating coil wound in a race track shape for induction heating the product, wherein the length of the heating coil is A product heating device for a vending machine characterized by being longer than the length of the product. 2. A commodity heating apparatus for a vending machine according to claim 1, wherein the heating coil is divided into a plurality of parts along the outer periphery of the commodity. 3. A product heating apparatus for a vending machine according to claim 2, wherein said plurality of divided heating coils have currents flowing in adjacent windings of adjacent heating coils with opposite polarity of said adjacent heating coils. Characterized in that they are oriented in the same direction. 4. A commodity heating apparatus for a vending machine according to claim 2, wherein the divided heating coils are connected so as to form at least one set of parallel circuits. Characteristic heating equipment for vending machines. 5. A commodity heating apparatus for a vending machine according to claim 1, wherein the heating coil is a distributed winding. 6. A commodity heating apparatus for a vending machine according to claim 1, wherein the gap between the heating coil and the commodity is larger near the longitudinal end of the commodity than at the center. A product heating device for a vending machine, characterized in that: