JPH0455688B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a heat retention device, and more specifically to a heat retention device suitable for application to hospital delivery carts, hotel room service carts, etc. be.

[Conventional technology]

Conventional heating devices for serving trucks either arrange a plurality of panel-shaped heat-generating heat storage elements inside a heat-insulating container and use natural convection to heat the entire inside of the heat-insulating container, or provide a heating element and a fan to heat the entire inside of the container using forced convection. I was trying to keep it warm.

[Problem to be solved by the invention] In the conventional heating device for a serving car having the above configuration,
Since the entire inside of the container is heated, that is, the air and all the metal members that make up the container, an increase in weight and cost is unavoidable in order to ensure a structure with good insulation and airtightness. There was a problem that the amount of electricity required for the temperature rise was longer.

In addition, food that must not be heated must be stored in separate containers or isolated rooms, which not only increases the number of serving trucks, their size, and weight, but also increases the workload of workers. There was a problem.

The present invention was made to eliminate the above-mentioned drawbacks.
To provide a heat insulating device for a serving car that can be made lightweight and compact to not only efficiently heat and keep warm but also improve the efficiency of serving work.

[Means to solve the problem]

The heat retention device for a serving car according to the present invention places a covering body on a tray that covers food and is thermally isolated from the outside, and supplies electricity to the inside of this covering body from an external power source via the built-in wiring of the serving car. A controlled heating means is provided, a removable lid is provided on the outer opening of the covering body to seal the food on the tray to keep it warm, and an arm extending above the covering body is provided on the body side of the serving vehicle. Attachment: Detachable attachment members are attached to opposing surfaces of the arm and the cover, respectively.

[Effect]

According to the heat retention device for a serving car according to the present invention, a covering body that covers food and is thermally isolated from the outside is placed on a tray, and an external power source is connected to the inside of the covering body via the built-in wiring of the serving car. A removable lid is provided on the outer opening of the covering to seal the food on the tray to keep it warm. By attaching the arms and attaching removable attachment members to the opposing surfaces of these arms and the cover, it is possible to efficiently heat and keep only the specified food on the tray and to facilitate the serving work. be able to.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 6. Reference numeral 1 denotes a bottom plate 2, left and right wall plates 3, 3 and pillars 4, 4 that are erected and fixed thereto;
It is a serving cart that is framed by a top wall plate 5 installed between these, and is equipped with handles 6, 6 provided on the outside of the left and right wall plates 3, 3, and wheels 7 such as casters provided on the bottom plate 2. It is constructed as a handcart that can be moved freely. In addition, inside the framed serving car 1, a tray 1 is installed by opening doors 9, 9 provided in the openings between the left and right wall plates 3, 3 fixed upright on the bottom plate 2.
A storage space 11 is formed in which 0 can be taken in and taken out freely.

The space between each of the left and right wall plates 3, 3 and each support column 4, 4 is wider than the trays 10 to be stored, so that the trays 10 are arranged in parallel vertically and horizontally. A tray receiving shelf 12 having an L-shaped cross section on which each tray 10 is placed is attached.
The tray 10 is stored on this tray receiving shelf 12 so as to be removable.

A control unit 5a is provided at the bottom of the top wall plate 5 of the serving cart 1 on both opening sides of the left and right wall plates 3, 3, and this control unit 5a is connected to an outlet 13 connected to an external power source. Installed, this outlet 1
3 and each storage chamber 10a in which the tray 10 is stored are connected via wires 14b for each predetermined storage row via each timer switch 14, 14.

On top of each tray 10, which is removably stored in the serving car 1, is an aluminum plate having a U-shaped cross section and a transparent abutment part 21, which covers the food arranged on the plate on the tray. A cover 20 as a covering body is placed, and a heat insulating member 24 made of urethane resin or the like is pasted on the inside of this cover 20, and a heat insulating member 24 made of synthetic resin or the like is attached to the opening of the cover 20 on the side of the swing door 9. The transparent lid 22 is a magnet 23.
It is removably attached via the Therefore,
When this lid 22 is attached to the opening 20a, the cover 2
The inside of 0 is sealed. Furthermore, a nichrome wire heater 25 is attached to the upper inside of the cover 20 on a ceramic plate that has a high rate of far-infrared radiation.
By energizing the nichrome wire heater 25, far infrared rays are generated to heat and keep warm the food arranged inside the cover 20. This nichrome wire heater 2
The connection cord 25a of No. 5 can be connected to the wiring 14b inside each of the storage chambers 10a. Further, an iron piece 26 is fixed to the outer upper part of the cover 20.

On the other hand, an arm 27 is fixed to the tray receiving shelf 12, which extends from the tray receiving shelf 12 onto the iron piece 26 of the cover 20, and has a magnet attached to its end. covered cover 20
When lifted, the iron piece 26 is attracted to this arm 27, and when the lid 22 is removed, the tray 10 can be taken out from the serving car 1 as it is. In the storage room 10a on the top floor, since there is no tray receiving shelf 12 at the top, the arms 27 are fixed to the pillars 4, 4 of the serving cart 1 or the left and right wall plates 3, 3 as described above.

Next, the operation will be explained. When serving food in the serving car 1, after placing the plated food on the tray 10, the cover 20 is heated.
The food to be kept warm is covered, while the food to be avoided from being heated is placed outside the cover 20 on the tray 10. In addition, if food is to be served on the tray 10 at another location and the position on which the food is to be served on the tray 10 has been determined in advance, first place the lid 22 on the cover 20, and then place the cover 20 on the arm. 2
Hold it in the state where it is adsorbed to 7. Each tray 10 arranged at a predetermined position is then carried to the serving car 1 and stored on the tray receiving shelf 12. And cover 2
0 placed on the tray 10, the timer switch 14
stored in a row of storage chambers 10a controlled by
The connection cord 25a of the heater 25 and the wiring 14b of the storage chamber 10a are connected, the swing door 9 is closed, and the serving vehicle is moved to a predetermined location. Next, an external power source is connected to the outlet 13, and the timer switch 14 heats the storage chamber 10a for each row.
Set the keep warm time and keep the food warm. When serving, the door 9 is opened, the lid 22 is removed, and the lid 22 is placed on the cover 20. Next, simply by adhering the cover 20 to the arm 27 and taking out the tray 10, the serving work is completed while the food remains warm.

In the above embodiments, the lid 22 and the opening 23 or the arm 27 and the cover 20 are removably attached to each other using magnets, but the present invention is not limited to this, and other attachment means such as a latch may be used. It goes without saying that you may also use the following.

Further, in the above embodiment, the tray storage chambers 10a in the serving car 1 are arranged in two rows for each opening, but in the case of a single row, the removable lids 22 of the cover 20 are placed on both sides of the cover 20. It may be provided.

〔Effect of the invention〕

As described above, according to the present invention, a covering body that covers food and is thermally isolated from the outside is placed on a tray, and electricity is controlled to be supplied from an external power source to the inside of the covering body via the built-in wiring of the serving vehicle. A removable lid is provided on the outer opening of the covering to seal the food on the tray to keep it warm, and an arm extending above the covering is attached to the body side of the serving vehicle. By attaching removable attachment members to the facing surfaces of these arms and the cover, the heating device of the serving vehicle can be made lighter and more compact, allowing for efficient heating and heat retention, and cost reduction through standardization. It has the effect of Furthermore, it has the effect of increasing the efficiency of serving work.

[Brief explanation of drawings]

FIGS. 1 to 3 are a side view, a front view, and a perspective view showing an enlarged main part of a serving vehicle according to an embodiment of the present invention, respectively, and FIG. 4 is a heat-retaining vehicle according to an embodiment of the present invention. A perspective view showing the device; FIGS. 5a to 5c are a plan view, a side sectional view, and a front view of the heat retention device shown in FIG. 4, respectively; FIG. 6 is a state in which the heat retention device is attached to an arm; It is a diagram. 10...Tray, 12...Tray receiving shelf, 13
...Timer switch, 20...Cover, 22...
...Lid, 23...Magnet, 25...Heater, 26...
Iron piece, 27... arm. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] 1. In a serving vehicle that stores multiple trays in a removable manner, a covering that covers the food and is thermally isolated from the outside is placed on top of the tray, and the built-in wiring of the serving vehicle is connected from an external power source to the inside of this covering. A removable lid is provided on the outer opening of the covering to seal the food on the tray to keep it warm. 1. A heat retention device for a serving car, comprising: arms extending from one side to the other; and removable attachment members attached to opposing surfaces of the arms and the cover.