JP6609604B2 - Spray-type heat treatment device tray and spray-type heat treatment device - Google Patents

Description

  The present invention relates to a spray-type heat treatment apparatus tray and a spray-type heat treatment apparatus used for sterilization and sterilization of products.

  2. Description of the Related Art Conventionally, a spray-type heat treatment device has been provided as one of devices that sterilize and sterilize products containing food or pharmaceutical products in packaging materials, such as retort foods and canned foods.

  As shown in FIG. 11, the spray-type heat treatment apparatus includes a tray 11 on which the product P is placed, a treatment tank (not shown) that houses the tray 11 on which the product P is placed, and a spray nozzle disposed in the treatment tank. 13, a spray nozzle that has a jet port 130 that jets a high-temperature heating fluid such as hot water or steam in the lateral direction, and jets the heating fluid from the jet port 130 toward the product P on the tray 11. 13.

  In this type of spray-type heat treatment apparatus, the high-temperature heating fluid sprayed from the spray nozzle 13 hits the product P, and the high-temperature heating fluid adheres to the entire product P. Therefore, the spray-type heat treatment apparatus can heat the entire product P to a high temperature, and enables sterilization and sterilization of the product P (see, for example, Patent Document 1 and Patent Document 2).

Japanese Patent Laid-Open No. 10-146379 Japanese Patent No. 6127167

  By the way, as a tray used in this type of spray-type heat treatment apparatus, an aluminum plate is provided as a plate on which a product is placed in order to reduce the weight, and a plurality of openings are formed in the plate. It is used.

However, a tray having an aluminum plate with such an opening may cause corrosion such as pitting corrosion due to water quality depending on the use environment, and pitting corrosion due to repeated heat treatment and fluid pressure. Corrosion may be promoted. For example, as shown in FIG. 12, a sharp edge may be formed in the opening peripheral part of an aluminum plate.
Such sharp edges may cause damage to the placed product or cause pinholes in the product.

  Then, this invention makes it a subject to provide the tray for spray type heat processing apparatuses with little possibility that a sharp edge will be formed in the opening peripheral part of an aluminum plate, and a spray type heat processing apparatus using the same.

Spray type heat treatment device tray according to the present invention comprises an aluminum plate having an opening formed product is placed, at least the upper surface of the opening edge of the aluminum plate, a lower surface, and the inner peripheral surface Is characterized in that a protective coating is formed.

According to such a configuration, since at least a part of the peripheral edge of the opening of the aluminum plate is protected by the protective coating, formation of a sharp edge at the peripheral edge of the opening is suppressed.
Therefore, the tray for the spray-type heat treatment apparatus having the above configuration is less likely to have a sharp edge at the peripheral edge of the opening of the aluminum plate.

In a tray for a spray-type heat treatment apparatus according to another embodiment, the protective coating may be a resin coating, a rubber coating, or a ceramic coating.
According to such a configuration, the formation of sharp edges at the peripheral edge of the opening is suppressed without the tray mass being extremely increased by the protective coating.

  Furthermore, the spray-type heat treatment apparatus tray according to another embodiment may be a stainless molded body, a resin molded body, or a rubber molded body in which the protective coating is mounted on the peripheral edge of the opening.

  Moreover, the spray-type heat treatment apparatus according to the present invention is the above-mentioned tray, a treatment tank containing the tray, and a spray nozzle disposed in the treatment tank, and injects a heating fluid toward the product on the tray. And a spray nozzle.

  ADVANTAGE OF THE INVENTION According to this invention, the tray for spray type heat processing apparatuses with little possibility that a sharp edge is formed in the opening peripheral part of aluminum plates, and a spray type heat processing apparatus using the same are provided.

FIG. 1 is a longitudinal sectional view of a spray-type heat treatment apparatus according to an embodiment. FIG. 2 is a cross-sectional view of the spray heat treatment apparatus according to the embodiment. FIG. 3 is a plan sectional view of the spray heat treatment apparatus according to the embodiment. FIG. 4 is a plan view of the tray for the spray-type heat treatment apparatus according to the embodiment. 5 is a cross-sectional view taken along the line VV in FIG. 6 is a sectional view taken along line VI-VI in FIG. FIG. 7 is an enlarged view of a portion VII in FIG. FIG. 8 is an enlarged view of a portion VIII in FIG. FIG. 9 is an enlarged view of the IX portion of FIG. FIG. 10 is a partial enlarged cross-sectional view of a spray-type heat treatment apparatus according to another embodiment, and is an enlarged view of a state in which fluid is ejected from an ejection port of a spray nozzle. FIG. 11 is a partial enlarged cross-sectional view of a conventional spray-type heat treatment apparatus, and is an enlarged view of a state in which fluid is ejected from an ejection port of a spray nozzle. FIG. 12 is a partially enlarged plan view of a conventional tray.

  Hereinafter, a spray-type heat treatment apparatus and a tray for a spray-type heat treatment apparatus according to an embodiment of the present invention will be described with reference to the drawings.

  The spray-type heat treatment apparatus and the spray-type heat treatment apparatus tray according to the present embodiment are for sterilization and sterilization of products. Here, as a product to be sterilized or sterilized, a product in which an object to be contained such as food or medicine is contained in a sealed bag, a can, a bottle, or the like, for example, retort food, canned food, or the like can be given.

  As shown in FIGS. 1 to 3, the spray-type heat treatment apparatus 1 according to the present embodiment includes a tray 2 on which the product P is placed, a treatment tank 3 that accommodates the tray 2, and a spray nozzle disposed in the treatment tank 3. 4 having an injection port 40 (see FIG. 9) for injecting the heating fluid from the side of the tray 2 in the horizontal direction intersecting the vertical direction (orthogonal in the present embodiment). 2 and a spray nozzle 4 for injecting a heating fluid toward the product P on the upper side.

As shown in FIGS. 4 to 8, the tray 2 (that is, the tray 2 for the spray-type heat treatment apparatus of the present embodiment) is erected from the aluminum plate 200 on which the product P is placed and the outer periphery of the aluminum plate 200. A peripheral wall 201 is provided.
Furthermore, the spray-type heat treatment apparatus tray 2 includes a corner guide 205 that is attached to the corner portion of the peripheral wall 201 so as to cover the upper side surfaces of the four corner portions of the peripheral wall 201 and to partially extend upward. Yes.
The four corner guides 205 are configured so as to sandwich and hold the stacked trays 2 when the trays 2 having the same shape are stepped.

  The aluminum plate 200 is formed in a rectangular shape in plan view. That is, the outer shape of the aluminum plate 200 is a pair of first sides arranged at intervals in the longitudinal direction and a pair of second sides arranged at intervals in a direction orthogonal to the longitudinal direction, Each is defined by a pair of second sides connected to a pair of first sides. The aluminum plate 200 is set to a size that allows a plurality of products P to be arranged and placed.

  The aluminum plate 200 is usually set to a thickness of 1.5 mm to 2 mm in order to reduce the weight, and a plurality of circular openings 220 are formed in a matrix to further reduce the weight. ing.

  A protective coating 5 is formed on the upper, lower and inner peripheral surfaces of the opening peripheral edge 221 of the aluminum plate 200. Specifically, the protective coating 5 is formed on the entire surface of the aluminum plate 200 to cover the opening periphery 221.

In the present embodiment, the protective coating 5 may be a resin coating, a rubber coating, or a ceramic coating formed by painting a resin, rubber, or ceramic.
According to such a configuration, formation of sharp edges of the opening peripheral edge 221 is suppressed without extremely increasing the mass. In particular, in the case of a resin coating film or a rubber coating film, even if the substantially entire surface of the aluminum plate 200 is covered, an extreme increase in mass can be prevented as compared with other coating films.

  In addition, the formation method of a coating film is not specifically limited, Conventionally well-known coating methods, such as electrostatic coating, spray coating, and vapor deposition, are employable.

Further, when painting, it is preferable to clean the surface of the coated portion of the aluminum plate 200.
By performing the surface cleaning, moisture and oil on the surface of the part to be coated can be removed, and the adhesion of the coating film is improved.

The coating film may consist of a single layer or a multilayer.
For example, it is possible to apply an undercoat that enhances adhesion and rust prevention.
Moreover, when hardening processing, such as baking, is required for both the undercoat layer and the topcoat layer, these hardening treatments are preferably performed simultaneously.
By performing the curing process at the same time, the integrity of the undercoat layer and the overcoat layer is improved.

Examples of the resin that forms the resin coating include thermoplastic acrylic resins, thermosetting acrylic resins, polyester resins, and epoxy melamine resins.
Among these, as the resin forming the resin coating film, an acrylic resin is preferable from the viewpoint of excellent adhesion to aluminum and weather resistance (particularly chlorine resistance).

When forming the undercoat layer and the topcoat layer, the resin that forms the undercoat layer is preferably an epoxy melamine resin, and the resin that forms the topcoat layer is preferably a thermosetting acrylic resin.
In the protective coating 5 having such an undercoat layer and an overcoat layer, the epoxy melamine resin is excellent in adhesion to an aluminum material, and the thermosetting acrylic resin is excellent in weather resistance. An excellent protective coating 5 is obtained.

  Examples of the rubber forming the rubber coating film include styrene butadiene rubber and chloroprene rubber.

  Examples of the ceramic that forms the ceramic coating include commercially available ceramic paints (for example, “Serrano” manufactured by Okitsumo Co., Ltd.).

In the present embodiment, the peripheral wall 201 includes a pair of first side walls 202 provided along each of a pair of first sides that define the outer shape of the aluminum plate 200, and a pair of outer walls that define the outer shape of the aluminum plate 200. And a pair of second side walls 203 provided along each of the second sides.
The second side wall 203 is formed higher than the first side wall 202.

  Both ends of the pair of first side walls 202 are connected to the pair of second side walls 203. Thus, the peripheral wall 201 is formed in a rectangular frame shape in plan view.

  As shown in FIGS. 7 and 8, the peripheral wall 201 (the first side wall 202 and the second side wall 203) includes rising portions 202a and 203a extending in the vertical direction and inward extending from the upper end edges of the rising portions 202a and 203a. And extending portions 202b and 203b.

  The rising portion 202a of the first side wall 202 is closed, while the rising portion 203a of the second side wall 203 is formed with a plurality of openings 225 for weight reduction.

The inwardly extending portion 203b of the second side wall 203 constitutes a support portion that receives and supports the trays 2 having the same shape stacked on the upper side.
The aluminum plate 200, the rising portions 202a and 203a, and the inward extending portions 202b and 203b are formed by bending a single metal plate.

In the present embodiment, the spray heat treatment apparatus 1 includes a plurality of trays 2 as shown in FIGS. 1 and 3. The plurality of trays 2 are stacked in the vertical direction with the product P placed thereon, and the upper tray 2 is supported by the inwardly extending portion 203b of the second side wall 203 as a support portion.
In the blocks B1 and B2 in which the trays 2 are stacked in the vertical direction, the first side wall 202 is lower than the second side wall 203. Therefore, the upper and lower trays 2 are separated on the first side wall 202 side of the tray 2. A gap S (see FIG. 9) is formed. This gap S corresponds to the difference in height between the first side wall 202 and the second side wall 203.

  As shown in FIG. 1 and FIG. 3, the processing tank 3 is a tank body 30 formed so as to be capable of accommodating the tray 2, and has a tank body 30 having an opening 300 for inserting and removing the tray 2, and the opening 300. And a lid 31 for closing. In the present embodiment, the tank body 30 includes a cylindrical trunk portion 301 that extends in a lateral direction perpendicular to the vertical direction, and a closed portion 302 that closes one end of the trunk portion 301 in the lateral direction.

  In the present embodiment, the other end in the horizontal direction of the body 301 is open, and the other end constitutes the opening 300 of the tank body 30. The diameter and the lateral length of the body 301 are set according to the size and number of trays 2 to be accommodated. In the present embodiment, the tank body 30 (body 301) is sized so that two blocks B1 and B2 in which a plurality of trays 2 are superimposed can be arranged side by side.

As the blocks B1 and B2 in which the plurality of trays 2 are stacked in this manner are accommodated in the tank body 30, the spray-type heat treatment apparatus 1 according to the present embodiment has a block B1 as shown in FIGS. , B2 is provided with transfer means 6 for transferring B2 from the opening 300 of the tank body 30 to the back side of the tank body 30. The transfer means 6 includes a plurality of rollers 60... Each configured to be rotatable, and arranged at intervals in the extending direction of the body portion 301 of the tank body 30.
The blocks B <b> 1 and B <b> 2 are transferred so that the gap S and the spray nozzle 4 correspond to each other, and are accommodated in the tank body 30.

  The treatment tank 3 having the above-described configuration is configured such that when the product P is sterilized or sterilized, the lid 31 closes the opening 300 of the tank body 30 so that the region where the tray 2 is disposed can be sealed. The

  As shown in FIG. 9, the spray nozzle 4 is disposed at a position corresponding to each gap S between the accommodated blocks B1 and B2. That is, the spray nozzle 4 is disposed so that the heating fluid injection port 40 and the gap S face each other.

The spray nozzle 4 is connected to a piping system 7 that supplies a heating fluid. As described above, the spray-type heat treatment apparatus 1 according to this embodiment includes a plurality of trays 2 that are stacked one above the other, and accordingly, includes a plurality of spray nozzles 4.
The plurality of spray nozzles 4 are arranged at intervals in the vertical direction corresponding to the gaps S between the blocks B1 and B2. That is, the spray nozzle 4 is disposed so that the spray port 40 of the spray nozzle 4 and the gap S between the blocks B1 and B2 face each other.
The plurality of spray nozzles 4 are pipes 70 constituting the pipe system 7, and are connected to a common (single) pipe 70 that extends in the vertical direction in the processing tank 3 and is fixed at a fixed position. It is maintained in a vertically spaced arrangement.

  In the present embodiment, as shown in FIG. 3, pipes 70 are arranged at each of the four places around the tray 2 in order to eject fluid from a plurality of places (here, four places) around the tray 2. A spray nozzle 4 is connected to 70.

  In the present embodiment, as described above, since the blocks B1 and B2 in which a plurality of trays 2 are stacked are accommodated in the processing tank 3, a plurality of blocks B1 and B2 are provided around each block B1 and B2, as shown in FIGS. Pipes 70 are arranged, and the spray nozzle 4 is connected to each pipe 70.

More specifically, as shown in FIG. 3, in the spray-type heat treatment apparatus 1 according to this embodiment, the block B <b> 1 that is located on both sides of the movement path of the blocks B <b> 1 and B <b> 2 in the treatment tank 3 and is stored. , A pipe 70 to which the spray nozzle 4 is connected (a pipe 70 constituting a part of the piping system 7) is arranged in a standing state at a position corresponding to the arrangement position (fixed position) of B2. Two pipes 70 are provided on both sides of the movement path of the blocks B1 and B2 with respect to the single blocks B1 and B2. A plurality of spray nozzles 4 are connected to a single pipe 70 so as to correspond to the arrangement of the stacked trays 2.
As a result, fluid is ejected from the plurality of spray nozzles 4 toward each of the four locations around the single blocks B1 and B2.

  In this embodiment, since the protective coating 5 is formed on the entire surface of the aluminum plate 200, even if sterilization or sterilization is performed by spraying a heating fluid from the spray nozzle 4, erosion or pitting is performed entirely. The occurrence of this is suppressed, and the risk of forming a sharp edge is low.

  In addition, this invention is not limited to the said embodiment, Of course, it can change suitably in the range which does not deviate from the summary of this invention.

  In the above embodiment, the opening 220 formed in the aluminum plate 200 is illustrated as a circular shape, but the shape of the opening 220 is not particularly limited in the present invention. Further, the size is not particularly limited.

In the above embodiment, the protective film 5 is formed on the entire surface of the aluminum plate 200. However, in the present invention, the protective film 5 is scattered in correspondence with the openings 220, and each opening 220 is formed. The opening peripheral part 221 may be covered.
In addition, the protective coating 5 does not have to be formed corresponding to all the openings 220, and may be formed corresponding to the openings 220 where the heating fluid easily collides.
Furthermore, the protective coating 5 does not need to be formed so as to cover all of the upper surface, the lower surface, and the inner peripheral surface of the opening peripheral portion 221, and is formed so as to cover only one surface or only two surfaces thereof. It may be.

In the said embodiment, although the resin coating film, the rubber coating film, or the ceramic coating film was illustrated as the protective coating 5, in this invention, the protective coating 5 is not limited to this.
In the present invention, the protective coating 5 may be formed of a stainless molded body, a resin molded body, or a rubber molded body that is mounted so as to cover the opening peripheral edge portion 221 of the aluminum plate 200.

  For example, as shown in FIG. 10, a molded body made of any one of stainless steel, resin, or rubber on the opening periphery 221 so as to cover the upper surface side, the lower surface side, and the inner periphery of the opening periphery 221 of the aluminum plate 200. The protective film 5 may be formed by attaching 55.

  Examples of the present invention will be described below.

Example 1
A tray provided with an aluminum plate having a large number of openings and having an alumite layer of 10 μm by anodizing was prepared.
Next, using this tray, surface cleaning was performed to completely remove moisture and oil from the surface of the aluminum plate.
Specifically, thinner degreasing was performed using PN melamine thinner, and after sufficient degreasing, the thinner was volatilized by air blow.
Subsequently, undercoating was applied in order to improve adhesion between the aluminum surface and the top coat and rust prevention.
Specifically, the epoxy resin was applied with a thickness of 10 to 15 μm by electrostatic coating.
Next, an overcoat was applied to provide weather resistance.
Specifically, a thermosetting acrylic resin having a thickness of 10 to 15 μm was applied by electrostatic coating.
Finally, baking for curing the coated film was performed by applying hot air at 160 ° C. for 20 minutes to obtain a tray for a spray-type heat treatment apparatus of Example 1.

Comparative Example 1
A tray with an aluminum plate having a 10 μm alumite layer by alumite treatment was not subjected to any treatment, and a tray for a spray-type heat treatment apparatus of Comparative Example 1 was obtained.

Test example 1
Each tray in the examples and comparative examples was heated under exactly the same conditions (from 20 ° C. to 120 ° C. over 10 minutes, maintained at 120 ° C. for 20 minutes, and then lowered from 120 ° C. to 45 ° C. over 15 minutes, for a total of 45 The spray-type heat treatment was performed 8 times per day for the spray-type heat treatment apparatus, and after 6 months, the surface state of the aluminum plate of each tray was visually confirmed.
As a result, the tray of Example 1 was not confirmed to be worn or corroded, and no sharp edge was formed. On the other hand, in the tray of Comparative Example 1, clear wear and corrosion were confirmed, and sharp edges were formed.

DESCRIPTION OF SYMBOLS 1 ... Spray-type heat processing apparatus, 2 ... Tray, 3 ... Processing tank, 4 ... Spray nozzle, 5 ... Protective film, 200 ... Aluminum plate, 220 ... Opening, 221 ... Opening peripheral part, P ... Product

Claims (4)

An aluminum plate having an opening on which a product is placed is formed , and a protective coating is formed on at least the upper, lower, and inner peripheral surfaces of the peripheral edge of the aluminum plate. Tray for spray-type heat treatment equipment.   The spray-type heat treatment apparatus tray according to claim 1, wherein the protective coating is a resin coating, a rubber coating, or a ceramic coating.   The tray for a spray-type heat treatment apparatus according to claim 1 or 2, wherein the protective coating is a stainless molded body, a resin molded body, or a rubber molded body mounted on the peripheral edge of the opening. A tray according to any one of claims 1 to 3, a processing tank for storing the tray, and a spray nozzle disposed in the processing tank, wherein a heating fluid is sprayed toward a product on the tray. A spray-type heat treatment apparatus comprising a spray nozzle.