JP3485141B2 - Heat-up cart - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a cart for heating up. That is, for example, in an aircraft
The present invention relates to a heating cart used for heating dishes such as entrées and meals. 2. Description of the Related Art For example, carts have been used for meal provision services in airplanes. And
Conventional carts of this type are box-shaped and have an outer box with a door attached to the front, a guide rail fixed on the inner surface of the outer box in left and right pairs in multiple stages, and can be freely inserted and removed with guide rails A tray held in the upper and lower tiers,
Having. On the tray, a cup of beverage, a dish of cold food, a knife, a fork, a spoon, etc. are placed together with tableware for cooking, and a planar heater is partially incorporated in a part of the corner of the tray. Cooking dishes are placed on such a heater, so that only the dishes are heated and heated. [0003] The following problems have been pointed out in such a conventional example. First of all, anxiety was pointed out about the effect of preventing electromagnetic interference (EMI). That is, a heater is incorporated in this kind of cart as described above, but conventionally, harmful electromagnetic waves generated from such a heater or the like may be emitted to the outside. Particularly, in the case of a cart in which the inside of the cart is heated by the heater as a whole, rather than partially, as described above, the capacity of the built-in heater is increased, and more recently, the cart is distant. Infrared rays and the like are also used for heat-up, and in the case of aircraft carts, such anxiety about the effect of preventing electromagnetic interference may cause a serious problem. [0004] Second, concerns about water resistance have also been pointed out. That is, although a heater is incorporated in this kind of cart as described above, when the inside of the cart is entirely washed with water after use, conventionally, a water accident such as electric equipment of the heater or wiring occurs. There was something. In particular, in the case of a cart whose interior is heated by the heater as a whole, rather than partially as described above, the capacity of the built-in heater increases, and the electric equipment and Since wiring and the like are frequently used, the scale becomes large, and the structure becomes complicated. Therefore, such a water accident is likely to occur, and the influence of the water accident is large, so that anxiety about water resistance may cause a serious problem. Third, concerns have been raised about the heat insulating effect. That is, although a heater is incorporated in this kind of cart as described above, it has been pointed out that the heat is easily released to the outside in the past. In other words, in this kind of cart, although the outer box made of heat insulating structure panels with low thermal conductivity inside and outside is used, in particular, the inside of the cart is not partially heated as described above, but is entirely heated by the heater. In the case of carts that are heated and dedicated to heating food, it is necessary to ensure that heat inside the cart does not escape to the outside, and it is required to further improve the heat insulation effect. Can cause major problems. Fourth, a problem has been pointed out with respect to the maintainability. First, this kind of cart incorporates a heater as described above, and its electrical equipment, wiring, etc. are provided inside.In addition, on the inner surface of the outer box, guide rails are formed in upper and lower multiple steps while forming a left and right pair Many are provided,
Various other accessories are attached to the outer box. Since these electrical equipment, wiring, guide rails, and other accessories are provided integrally with the outer box, repairs and other maintenance are troublesome and troublesome.
Was pointed out. In particular, in the case of a cart where the inside of the cart is heated by the heater as a whole, rather than partially as described above, and is therefore dedicated to heating up the dishes,
Since the capacity of the heater to be incorporated becomes large, and the electrical equipment and wiring are frequently used, the scale becomes large and the system becomes complicated. The present invention has been made in view of such circumstances, and has been made to solve the above-mentioned problems of the conventional example. The first use of an inner case that absorbs and reduces harmful electromagnetic waves generated from the tray heater and has a space between the outer case and
Secondly, it has an excellent effect of preventing electromagnetic interference,
Thirdly, an object of the present invention is to propose a cart for heating up, which is excellent in the heat insulation effect, fourthly, has improved maintainability, and fifthly, can realize these easily and easily. [0008] The technical means of the present invention for solving such a problem is as follows. That is, the heating cart has a box-like shape and includes doors and casters. The trays are stored in multiple stages inside and the dishes in the dishes placed on the trays are heated. An outer box having a box shape and the door attached to the front surface, an inner case disposed in the outer box and entirely made of a conductive material, and a heater disposed in the inner case And a plurality of guide rails fixedly arranged in upper and lower stages in a left-right pair inside the inner case, and the tray held by the guide rails so as to be freely taken in and out. The inner case has a box shape with an open front surface, and is fitted into the outer box so as to be able to be taken in and out with an interval therebetween. After use, the inside of the inner case is entirely washed with a detergent or the like. The tray is also used as the heater as a whole, or the heater is partially incorporated in the tray. The inner case has an electromagnetic shielding structure based on conductivity, exhibits a function of absorbing and reducing magnetic fields and radio waves generated from the heater and the like, that is, harmful electromagnetic waves, and is provided with a ground. And According to the present invention, the following is achieved. This cart uses an inner case which is disposed in an outer case and has conductivity and has a space between the cart and the outer case. When the heater is energized and heated, the inside of the inner case is heated by heat conduction, convection, radiation, and the like, so that the dishes and dishes on the tray stored in the inner case are heated and heated up. . Therefore, first, in this cart, an electromagnetic shield structure is formed by an inner case having conductivity, and a magnetic field and a radio wave generated from a heater or the like, that is, harmful electromagnetic waves are absorbed and reduced. The inner case is grounded. The presence of such an inner case prevents the cart from emitting harmful electromagnetic waves to the outside. Thus, it is excellent in preventing electromagnetic interference (EMI). Second, the electrical equipment and wiring associated with the heater are naturally arranged on the outer surface side of the inner case, the inner surface of the outer case, the inside, and the like. Therefore, when the inside of the inner case of the used cart is entirely washed with a detergent or the like, such an electric equipment or a wiring or the like, which is wet, is prevented from being wet. In addition, since the tray which is also used as a heater is removed at the time of washing with water, there is no danger of getting wet. Thus, it is excellent in waterproofness. Third, the cart has a double structure in which an inner case is disposed in an outer case, and further has a structure having a space between the outer case and the inner case. Therefore, the inner and outer heat insulation is excellent, for example, the heat is less likely to escape from the inner case heated by the heater to the outside. Thus, it is also excellent in heat insulation. Fourth, in this cart, each guide rail on the inner surface of the inner case is fixed from the outer surface side of the inner case, and the electrical equipment and wiring of the heater are also provided on the outer surface side of the inner case and the inner surface of the outer box. It is arranged on the side and the like, and further, other accessories are attached to the outer box. Therefore, these repairs and other maintenance can be easily and easily performed by taking out the inner case and performing it. Thus, maintainability is also improved. Fifth, these can be easily realized by a simple configuration in which an inner case having conductivity is arranged in an outer case and a space is provided between the inner case and the outer case. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail based on embodiments of the invention shown in the drawings. FIG. 1 is an exploded perspective view of a reference example not belonging to the present invention, and FIG. 2 is a front sectional explanatory view of a main part thereof. FIG. 3 is an explanatory front view of a main part of an example of the embodiment of the present invention. The cart 1 for heating up has a box-like shape, is provided with a door 2 and a caster 3, and has trays 4 stored therein in multiple stages up and down, and dishes A in tableware 5 placed on the tray 4. Is to be heated up. The cart 1 has a box shape, an outer box 6 to which the door 2 is attached, an inner case 7 arranged in the outer box 6 and made of a material having conductivity as a whole, and an inner case 7 inside the inner case 7. Heater 8 and inner case 7
The guide rails 9 are fixed to the inner surface of the upper and lower surfaces in a multi-stage manner, forming a left-right pair, and the tray 4 is held by the guide rails 9 so as to be freely taken in and out. These will be described in further detail. The cart 1 is used, for example, when an occupant performs a meal providing service to a passenger in a seat in an aircraft.
Then, first, the outer box 6 of the cart 1 includes the top plate 10 and the floor plate 1.
1, a left and right side plate 12, a back plate 13 and the like.
, And casters 3 are attached to the bottom of the four corners of the floor panel 11 and are moved by pushing with hands. Top plate 10, floor plate 11, side plate 12, back plate 13, door 2 of outer box 6
And the like, panels each having a heat insulating structure are used, and these are assembled to corner members made of aluminum or the like which are arranged as a frame vertically, horizontally, and vertically. Next, the inner case 7 has an upper surface 15, a lower surface 16, left and right side surfaces 17, a back surface 18 and the like, has a box shape having only a front surface opened, and has a slight space C between the inner case 7 and the outer case 6. It is made of aluminum or other metal, conductive plastic, or other conductive material. The space C between the inner case 7 and the outer box 6 is formed by an attached rib, flange or the like. In addition, a heat insulating material D may be interposed in such an interval C as shown in the example of FIG. 3, and the heat insulating material D may be entirely or partially provided as in the illustrated example. It is interposed and attached to the outer surface of the inner case 7 or the inner surface of the outer box 6 as shown in the illustrated example. On the inner surface of the left and right side surfaces 17 of the inner case 7, guide rails 9 are fixedly provided in upper and lower multi-stages with the right and left height levels aligned and facing each other. The left and right ends of the tray 4 are sandwiched vertically. The tray 4 is arranged between the left and right guide rails 9 as a shelf that can be freely taken in and out, and the tableware 5 of the dish A is placed on the tray 4. Then, the trays 4 are arranged in the upper and lower 12 tiers, and the tableware 5 of the dish A is arranged in the upper and lower 11 tiers by two each in the meantime. The dish A mainly means meat dishes or fish dishes and is also called entrée or meal. First, it is cooked in advance on the ground, and when providing services to passengers on an airplane or the like afterwards, a cart is used. In some cases, heating is performed by heating in the cart 1 (heating up) by providing heating to the passengers in an airplane or the like. ). The tableware 5 of the dish A is often provided with a lid. In the reference example of FIG. 2, a heater 8 is arranged outside the inner case 7 as follows. That is, in the inner case 7 of the reference example of FIG. 2, a planar heater 8 is provided on each surface except the open front surface, that is, the upper surface 15, the lower surface 16, the left and right side surfaces 17, the rear surface 18, and the like. It is provided almost entirely on the outer surface side. The heater 8 is formed of a plate-like block body, and a single or a plurality of heaters are attached to each surface. For example, a rubber heater through which a heating wire such as a nichrome wire is passed in a broken line shape is used as a core material. In addition, an aluminum sheet is joined to the outer surface. Further, the inner surface of the inner case 7 is subjected to a surface treatment so as to contain, for example, silica or another substance so as to radiate far-infrared rays B, which are heat rays by heating, but the inner case 7 itself ( In some cases, silica and other substances are contained in the interior (inside of the surface), so that the heating can emit far-infrared rays B as heat rays. As is well known, the far-infrared ray B has the longest wavelength in the infrared region, has the property of a heat ray, is easily absorbed inside an object, and does not heat air during irradiation of the irradiation object. It is known that the irradiation target can be efficiently heated in a short time, and furthermore, the evaporation target can be prevented from evaporating moisture, and the irradiation target has a deodorizing effect. By the way, in the cart 1 of this reference example,
Since the planar heater 8 is attached to the inner case 7 as described above, the connection terminals of the heater 8 are connected to the cart side via the pantograph-structured terminals provided on the outer box 6 and the like, electrical equipment, wiring, and the like. It is connected to a connector (not shown). The cart-side connector is connected to a power-supply-side connector attached to the galley side in the machine, so that the heater 8 can be energized. On the other hand, in the embodiment of the present invention shown in FIG. 3, the heater 8 is provided inside the inner case 7 as follows.
Is arranged. That is, in the example of FIG. 3, the tray 4 is also used as the sheet heater 8 as a whole, and has a structure in which a rubber heater similar to that described above is used as a core material and aluminum thin plates are joined to the upper and lower sides thereof. . Then, the upper and lower aluminum thin plates of the tray 4 which also serves as the heater 8 are subjected to surface processing so as to radiate far-infrared rays B as heat rays by heating, or are configured to radiate far-infrared rays B by themselves. . In any case, the tray 4 which also serves as the heater 8 is energized and heated as the heater 8, and the energization method and the like are the same as described above with reference to the reference example of FIG. The embodiment of FIG. 3 of the present invention is configured as described above. Then, it becomes as follows. The heat-up cart 1 includes an inner case 7 which is provided in the outer case 6 and has conductivity, and has a space C between the cart 1 and the outer case 6. And the heater 8 also serves as the tray 4
However, the cooking A is heated by being energized and generating heat. And as a heating method for such a dish A, first, far infrared rays B radiated from the tray 4 are as follows.
Along with irradiating the dish A as heat rays, heat conduction from the tray 4 also serving as the heater 8 to the dish A via the tableware 5,
In addition, convection to the tableware 5 and the dish A via the space in the inner case 7 is also performed. In any case, the far infrared rays B
The heating is performed synergistically by radiation, heat conduction, convection and the like, and the inside of the inner case 7 of the cart 1 is entirely heated. Accordingly, the tableware 5 and the dish A on the tray 4 stored in the inner case 7 are uniformly heated from the surroundings respectively, the thermal efficiency is improved, and the unevenness and the scorching of the dish A are prevented. Due to the characteristics of the far infrared ray B, the evaporation of water from the dish A is prevented, and a deodorizing effect is also exhibited. At the time of providing the meal, the food A in the cart 1, which has been heated in this manner, is uniformly heated and kept warm, or is cooked and heated up, is disconnected from the cart side connector and the power supply side connector. After that, cart 1 is moved from the galley to the passenger seat,
Provided to passengers. Then, in the cart 1 for heating up, the following first, second, third, fourth and fifth are performed. First, in the cart 1, an electromagnetic shield structure is formed by an inner case 7 having conductivity, so that a magnetic field or a radio wave generated from the heater 8 or the like, that is, a harmful electromagnetic wave is absorbed and reduced. The inner case 7 is provided with a ground. The presence of the inner case 7 prevents the cart 1 from emitting harmful electromagnetic waves to the outside. Secondly, in the cart 1, the electrical equipment and wiring associated with the heater 8 are naturally arranged on the outer surface of the inner case 7, the inner surface of the outer box 6, and the like. Therefore, when the inside of the inner case 7 of the used cart 1 is thoroughly washed with a detergent or the like, such electrical equipment and wirings are wetted, and the accident of getting wet with water is reliably prevented. . In addition, since the tray 4 which also serves as the heater 8 is detached at the time of washing with water, there is no risk of water getting wet in any case. Third, the cart 1 has a double structure in which the outer box 6 is formed of a panel having a heat insulating structure, and an inner case 7 is disposed in the outer box 6. 7, a structure having a space C is provided. Therefore, the inner and outer heat insulation is excellent, such that heat is less likely to escape from the inner case 7 heated by the heater 8 to the outside. Fourth, in the cart 1, the guide rails 9 on the inner surface of the inner case 7 are naturally fixed from the outer surface side of the inner case 7, and the electric equipment of the heater 8, wiring and the like are also provided. Are also provided on the outer surface side of the inner case 7, the inner surface side of the outer case 6, and the like, and other equipment is attached to the outer case 6. Therefore, these repairs and other maintenance can be easily and easily performed by taking out the inner case 7 and then performing it. Fifth, they have a simple structure in which an inner case 7 having conductivity is arranged in an outer case 6 and a space C and a heat insulating material D are provided between the inner case 7 and the outer case 6. It is easily realized. In the example of FIG. 3 described above, the heater 8 has a planar shape, and the tray 4 is also used as the heater 8 entirely. However, the present invention is not limited to such an example, and is applicable to a cart 1 of the type described in the above-described conventional example in which the heater 8 is partially incorporated in a part of the tray 4. In this case, too, the inner case 7 is arranged in the outer box 6 according to the example of FIG. As described above, the heat-up cart according to the present invention is disposed in the outer box, has conductivity and forms an electromagnetic shield structure, and is generated by the heater of the internal tray. The following effects are exhibited by adopting the inner case for the first time, which absorbs and reduces harmful electromagnetic waves and has a space between it and the outer case. First, it has an excellent effect of preventing electromagnetic interference. That is, in the heat-up cart, an electromagnetic shield structure is formed by an inner case having conductivity, so that harmful electromagnetic waves generated from a heater or the like are absorbed. Therefore, especially in the case of a cart that is heated not entirely but partially, and the interior of the inner case is dedicated to heating up the dishes, the capacity of the built-in heater is large and far infrared rays etc. may be used. Even in this case, no harmful electromagnetic waves are emitted to the outside as in the above-described conventional example, and the effect of preventing electromagnetic interference (EMI) is excellent, so that it is suitable as an aircraft cart. Second, it has excellent water resistance. In other words, in this heat-up cart, the heater is built in and the inner case is entirely washed with water after use, but at this time, the electrical equipment and wiring attached to the heater are: Of course, since it is disposed between the inner case and the outer case, the occurrence of the water wet accident is prevented. Therefore, especially in the case of a cart that is heated not only partially but entirely, so that the interior of the inner case is exclusively used for heating up the dishes, the capacity of the built-in heater is large, and the electrical equipment and wiring are often used. Even if it becomes large-scale and complicated, the occurrence of a water-wetting accident is prevented and the water resistance is excellent as in the above-described conventional example of this type. Third, the heat insulating effect is further improved. That is, this heat-up cart has a double structure in which an inner case is arranged in an outer case, and furthermore, has a structure having a space between the outer case and the inner case. It is difficult for heat from the heated heater to escape to the outside. Therefore, in particular, even in the case of a cart that is heated not only partially but entirely in the inner case and is therefore dedicated to heating up the dish, heat is applied between the inside and the outside as in the above-described conventional example. There is no risk of transmission, and it has excellent heat insulation effects inside and outside. Fourth, maintainability is also improved. That is, in this heat-up cart, a large number of guide rails are fixedly mounted on the inner surface of the inner case, and the fixing work is performed from the outer surface side of the inner case.
The electrical equipment and wiring of the heater are arranged on the outer surface side of the inner case, the inner surface side of the outer case, and the like, and further, other accessories are attached to the outer case. Therefore, these repairs and other maintenance can be easily and easily performed if the inner case is taken out of the outer case and then carried out. Therefore, especially in the case of a cart that is heated not only partially but entirely, so that the interior of the inner case is exclusively used for heating up the dishes, the capacity of the built-in heater is large, and the electrical equipment and wiring are often used.
Even if it becomes large-scale and becomes complicated, maintenance is not troublesome and troublesome as in the above-described conventional example, and the maintainability is improved. Fifth, and they are easily and easily realized. In other words, the heat-up cart is arranged in the outer case and has conductivity, and the inner case having the space between the outer case and the inner case is employed. It is easily realized. As described above, the effects exhibited by the present invention are remarkable and large, for example, all the problems existing in this type of conventional example are solved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view for explaining a reference example which does not belong to the present invention, regarding a cart for heating up. FIG. 2 is an explanatory front view of a main part for explaining the reference example. FIG. 3 is an explanatory front view of a main part of an example of the embodiment, which is used for describing an embodiment of the present invention. [Description of Signs] 1 Cart 2 Door 3 Caster 4 Tray 5 Tableware 6 Outer box 7 Inner case 8 Heater 9 Guide rail 10 Top plate 11 Floor plate 12 Side plate 13 Back plate 14 Hinge 15 Upper surface 16 Lower surface 17 Side surface 18 Back A Cooking B Far Infrared ray C Distance D Insulation material

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47B 31/02

Claims (1)

(57) [Claims] [Claim 1] A box-shaped door and a caster are provided, trays are stored in multiple stages inside and inside, and dishes in tableware placed on the tray are heated up. A heat-up cart, comprising: an outer box having a box shape and the door attached to a front surface; an inner case disposed in the outer box and entirely made of a conductive material; A heater arranged inside the inner case, a guide rail fixed to the inner surface of the inner case in a left-right pair in multiple stages up and down, and the tray held by the guide rail so as to be freely taken in and out. The inner case has a box shape with an open front surface, is inserted into the outer box so as to be able to be taken in and out at an interval, and after use, the inside is entirely made using a detergent or the like. Washed in water
The tray is also used as the heater as a whole.
Or the heater is partially integrated
The inner case has an electromagnetic shielding structure based on conductivity.
To form magnetic fields, radio waves,
Demonstrates the function of absorbing and reducing harmful electromagnetic waves,
A cart for heating up, which is provided with a ground .