JP2020192086A - Food temperature regulating system - Google Patents

Abstract

To provide a food temperature regulating system capable of inhibiting a cart and a station from being separated unintentionally.SOLUTION: A food temperature regulating system includes a movable cart 3 having an inner space for accommodating food, a station 2 for supplying air for regulating the temperature of food to the inner space, and a connection device for connecting or separating the cart 3 and the station 2 by using a latch mechanism. The connection device includes a striker 42 provided to one of the cart 3 and the station 2, a latch part 17 provided to the other of the cart 3 and the station 2 for holding the striker 42 by engaging with the striker 42, and a releasing part for releasing the engagement with the striker 42 by the latch part 17.SELECTED DRAWING: Figure 2

Description

The present invention relates to a food temperature control system including a cart that can accommodate and move food and a station that can control the temperature of the food in the cart.

Traditionally, for the purpose of providing meals at various facilities (for example, medical facilities and nursing homes), carts that can accommodate and move a large number of trays containing cooked food and food heating have been used. A food temperature control system equipped with a cooling station has been proposed. This type of food temperature control system, for example, heats or cools food with the cart connected to the station, and then separates the cart from the station to transport and serve the food (for example). , Patent Document 1).

Utility Model Registration No. 3087921

By the way, in the conventional food temperature control system described above, the cart and the station are connected or separated by a connecting device using an electromagnet. Specifically, this coupling device can select whether or not to attract the metal plate provided on the cart to the electromagnet unit by controlling the energization state of the electromagnet unit provided in the station. Although such a connecting device has an advantage in that the connection / separation between the cart and the station can be electrically controlled, it should be connected due to a power failure or a malfunction of the control system. There is a disadvantage in that the station and the cart may be unintentionally separated.

The above-mentioned demerit may hinder the provision of meals at an appropriate time, for example. For example, in the field of medical care or long-term care, the food temperature control system holds a cart containing cooked food in a state of being connected to a station, and controls the temperature (reheats, etc.) of the food at a predetermined time by a timer or the like. It is used for purposes such as providing. In this application, if a power failure occurs during the connection between the cart and the station and the cart is separated from the station, the temperature of the food cannot be adjusted properly thereafter. Such a problem occurs when the user cannot quickly grasp that the cart has been unintentionally separated, such as a power outage at night, or even if the unintended separation can be grasped, it is difficult to reconnect the cart. In such cases, it becomes a particular problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a food temperature control system capable of suppressing an unintended separation between a cart and a station.

In order to achieve the above-mentioned object, the food temperature control system according to the present invention is characterized by the following [1] to [4].
[1]
A movable cart with an internal space to store food,
A station that supplies air for controlling the temperature of the food to the internal space,
A coupling device that connects or separates the cart from the station using a latch mechanism.
Must be a food temperature control system.
[2]
In the food temperature control system described in [1] above,
The connecting device is
A striker provided on one of the cart and the station,
A latch portion provided on the other side of the cart and the station and holding the striker by engaging with the striker.
It has a release portion that disengages the latch portion from engaging with the striker.
Must be a food temperature control system.
[3]
In the food temperature control system according to the above [1] or the above [2],
The cart
It has an opening that communicates with the internal space.
The station
An inclined installation having an annular connecting frame portion that comes into contact with the peripheral edge of the opening when connected by the connecting device, and tilted so that the upper portion of the connecting frame portion is located away from the cart, or , The lower part and the upper part are configured to be upright so that they are in the same position with respect to the cart.
The connecting device is
Provided above the contact point between the peripheral edge of the opening and the connection frame.
Must be a food temperature control system.
[4]
In the food temperature control system described in [3] above,
The station
A packing for sealing the contact portion is provided on the peripheral edge of the connection frame portion.
The connecting device is
Provided above the packing
The cart
When connected by the connecting device, the peripheral edge of the opening is held in a state of being pressed against the packing by the weight of the cart.
Must be a food temperature control system.

According to the food temperature control system having the configuration of [1] above, a movable cart having an internal space for accommodating food and a station for supplying air for controlling the temperature of food to the internal space of the cart are latched. It is mechanically connected or separated by a coupling device using a mechanism. The food temperature control system of this configuration can be mechanically connected or separated by a latch mechanism, unlike the conventional system that electrically connects or separates. Therefore, since electric power is not required to maintain the state in which the cart and the station are connected, the connection between the cart and the station can be maintained even if a power failure occurs. Therefore, the food temperature control system of this configuration can suppress the unintended separation of the cart and the station.

Further, in the conventional food temperature control system, in order to properly operate the connecting device using the electromagnet unit, usually, the cart and the station (specifically, the electromagnet unit and the metal plate on the other side) are used. Precise alignment is required. This is due to the fact that the metal plate needs to be sufficiently close to the magnetic force zone generated by the electromagnet unit, and that the attractive force as designed cannot be obtained unless the electromagnet unit and the metal plate are sufficiently in close contact with each other. .. On the other hand, in the food temperature control system having the above configuration, since the cart and the station are mechanically connected by using the latch mechanism, the accuracy required for the alignment between the cart and the station is usually higher than that in the case of using the electromagnet unit. Is low. Specifically, as long as the latch mechanism is engaged, the cart and the station can be properly connected even if some positional deviation or angle deviation occurs. Therefore, the food temperature control system having the above configuration is also excellent in workability when attaching and detaching the cart and the station during actual use, as compared with the conventional food temperature control system.

The above-mentioned "temperature control" is to heat the food (for example, to heat the cooked food to the eating temperature) and to cool the food (for example, to cool the cooked food to the storage temperature). ), And the concept includes maintaining the temperature of the heated or cooled food at the eating temperature.

According to the food temperature control system having the configuration of [2] above, the coupling device engages the striker provided on one of the cart and the station, the latch portion provided on the other side of the cart and the station, and the latch portion and the striker. It has a release portion for releasing the above. Therefore, for example, the striker can be engaged with the latch portion simply by bringing the cart close to the station installed at a predetermined position. Therefore, the food temperature control system of this configuration is excellent in workability when connecting the cart and the station in actual use.

According to the food temperature control system having the configuration of [3] above, the installation method (tilting type installation) in which the upper part of the connection frame part of the station is located away from the cart, or the connection frame part of the station. The station is installed by the installation method (upright installation) so that the lower part and the upper part of the are in the same position with respect to the cart. Further, the cart and the station are connected by using a connecting device provided above the contact point between the connection frame portion of the station and the opening of the cart. As a result, the center of gravity of the cart is located below the connecting device, so that a moment of force is generated in the cart in the direction in which the cart approaches the station around the connecting point (for example, FIG. 9). reference). As a result, if the cart and the station are connected, the cart will naturally approach the station due to its own weight without exerting an external force on the user. Therefore, as long as the connecting device is provided even above the contact point between the connection frame portion and the opening, the connection frame portion and the opening can be connected without providing the connecting device at another location such as below the contact point. It will be possible to connect the cart and the station while keeping the top and bottom in close contact with each other. Therefore, the food temperature control system having this configuration can reduce the manufacturing cost because the number of connecting devices can be reduced, and is excellent in workability when attaching and detaching the cart and the station during actual use. The above-mentioned "upper" and "lower" are based on the vertical direction when the food temperature control system is installed and used in a facility or the like. The same applies to the upper and lower criteria.

According to the food temperature control system having the configuration of [4] above, the weight of the cart is applied to the entire packing provided on the peripheral edge of the connection frame of the station, and the peripheral edge of the opening of the cart is evenly pressed against the packing. be able to. This allows the entire area between the station connection frame and the cart opening to be evenly sealed. Therefore, the food temperature control system having this configuration can suppress air leakage when supplying air for temperature control from the station, and can control the temperature of the food appropriately.

As described above, according to the present invention, it is possible to provide a food temperature control system capable of suppressing an unintended separation between a cart and a station.

FIG. 1 is a perspective view of a food temperature control system according to an embodiment of the present invention in which a cart and a station are connected. FIG. 2 is a perspective view of a food temperature control system in which the cart and the station are separated. FIG. 3 is a perspective view of the station. FIG. 4 is a perspective view of the cart. 5 (a) is a perspective view showing a detailed shape of the latch portion and the striker, and FIG. 5 (b) is a cross-sectional view taken along the line AA of FIG. 5 (a). 6 (a) to 6 (c) are diagrams for explaining the process of connecting the latch portion and the striker, and FIGS. 6 (d) to 6 (f) show the connection of the latch portion and the striker. It is a figure for demonstrating the process which is released. FIG. 7A is a side view showing how the cart is pushed toward the station, and FIG. 7B is a side view of a food temperature control system in which the cart and the station are connected. FIG. 8 is a side view for explaining the arrangement position of the latch portion and the striker. FIG. 9 is a diagram for explaining that a moment of force in the direction in which the cart approaches the station is generated in the cart around the connection point between the cart and the station (illustrated with emphasis on the inclination of the cart). There is). 10 (a) to 10 (c) are diagrams for explaining the transition of the detection results of the latch detection unit and the cart detection unit when the cart is pushed toward the station in a state where the cart is not tilted with respect to the station. Is. 11 (a) to 11 (c) are diagrams for explaining the transition of the detection results of the latch detection unit and the cart detection unit when the cart is pushed toward the station in a state of being tilted at an angle. FIG. 12 is a flowchart showing a processing flow when the connection determining means determines the connection or separation between the cart and the station. FIG. 13 is a diagram showing the arrangement of a latch portion, a striker, and a release lever in the food temperature control system according to the embodiment of the present invention. FIG. 14 is a diagram showing the arrangement of the latch portion, the striker, and the release lever in the food temperature control system according to the modified example. FIG. 15 is a diagram showing the arrangement of a latch portion, a striker, and a release lever in a food temperature control system according to another modification.

<Embodiment>
Hereinafter, the food temperature control system 1 according to the embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, the food temperature control system 1 includes a station 2 which is stationary on the floor surface 5 (see FIG. 7), a cart 3 which is movable and is connected to the station 2, and a station 2. And a connecting device 4 (see FIG. 7) for connecting or disconnecting the cart 3.

The food temperature control system 1 can cool and heat the food contained in the cart 3 by the cold air or hot air blown from the station 2, and separates the cart 3 containing the temperature-controlled food from the station 2. It is possible to provide it. The food temperature control system 1 is used, for example, for the purpose of providing meals in medical facilities, nursing care facilities, and the like.

<Station 2>
First, the configuration of the station 2 will be described. The station 2 is a device capable of supplying hot air or cold air to the connected cart 3. As shown in FIG. 3, the station 2 includes a vertically long square-shaped housing 11, a machine room 12 mounted on the upper part of the housing 11, and fixed legs 13 installed on the bottom of the housing 11. , Is equipped. The machine room 12 includes a cooling device (not shown) that circulates a refrigerant to a cooler (not shown) that cools air, and a control unit (not shown) that controls the supply of hot air or cold air.

A housing opening 14 that connects to the cart 3 and supplies hot air or cold air is opened on the front surface of the housing 11. The housing opening 14 is provided with a connection frame portion 15 projecting forward in a frame shape, and a frame portion packing 16 for sealing the connection with the cart 3 is provided at the tip of the connection frame portion 15 over the entire circumference. It is provided. Below the housing opening 14, a pair of cart guides 52 that guide the cart 3 to the connection frame portion 15 are provided.

At the upper part of the connection frame portion 15, latch portions 17 for connecting and holding the cart 3 are provided at two positions on the left and right. The latch portion 17 constitutes a part of the coupling device 4. A release lever 18 for releasing the locked state of the latch portion 17 is provided on the front surface of the housing 11. Behind the latch portion 17, a release mechanism 19 (see FIG. 6) for releasing the locked state of the latch portion 17 is provided. The release mechanism 19 is interlocked with the release lever 18 by a wire 21 or the like (see FIG. 13). The release lever 18, the release mechanism 19, the wire 21, and the like constitute the "release portion" of the present invention.

The control unit provided in the machine room 12 is provided with a connection determination means for determining that the cart 3 is completely connected. The connection determination means are a latch detection unit 22 provided on each of the left and right latch portions 17 to detect the operation of the latch portion 17, and a cart detection unit 23 for detecting a cart 3 approaching a substantially central portion of the left and right latch portions 17. And (see FIG. 10). The specific operation of the connection determination means will be described later.

Inside the housing 11, a heating / cooling unit 24, a cooling unit 25, and a housing partition plate 26 for partitioning the heating / cooling unit 24 and the cooling unit 25 are provided. The heating / cooling unit 24 opens on the left side of the connection frame unit 15, and the cooling unit 25 opens on the right side of the connection frame unit 15. The housing partition plate 26 is located substantially in the center of the housing opening 14, and extends to the tip of the connection frame portion 15. A partition packing 27 is provided at the tip of the housing partition plate 26.

The heating / cooling unit 24 passes the first cooler (not shown) connected to the cooling device (not shown), the heater (not shown), and the air sucked from the cart 3 through the first cooler and the heater, and the cart 3 It is equipped with a first circulation fan (not shown) that blows out to.

The cooling unit 25 includes a second cooler (not shown) connected to the cooling device, and a second circulation fan (not shown) that allows air sucked from the cart 3 to pass through the second cooler and blows out to the cart 3. ing.

The operation of the first and second coolers, the heater, and the first and second circulation fans is controlled by the control unit. Hot air is blown out by the operation of the heater and the first circulation fan, and cold air is blown out by the operation of the first and second coolers and the first and second circulation fans. The heating / cooling unit 24 is controlled so that the blowing of hot air and the blowing of cold air can be switched. As a result, the food temperature control system 1 can heat or cool the two regions separated by the housing partition plate 26 independently of each other. Therefore, the food temperature control system 1 can, for example, simultaneously control the temperature by heating a part of a plurality of foods arranged on one tray 46 while heating the other part.

On the front surface of the housing 11, an operation unit 28 composed of a touch screen or the like for operating the control unit and a display unit 29 for displaying the operation status of the station 2 are arranged. The operation unit 28 is not limited to the touch screen, and may be configured by physically operating hard buttons, or may be configured to be operated by communication or the like by an external terminal.

<Cart 3>
Next, the configuration of the cart 3 will be described. As shown in FIGS. 2 and 4, the cart 3 includes an outer cart 31 and an inner cart 32 that can be stored in the outer cart 31. The outer cart 31 includes a square outer cart main body 34 having a storage chamber 33 for storing the inner cart 32, and a plurality of casters 35 fixed to the bottom surface of the outer cart main body 34.

The outer cart main body 34 has a connection side opening 36 on the side connected to the station 2, and an opening 37 on the side opposite to the side connected to the station 2 so that the inner cart 32 can be carried in and out. The connection side opening 36 and the opening 37 are provided with an opening / closing door 38 and an opening / closing door 39, respectively. FIG. 2 shows a state in which both the opening / closing doors 38 and 39 are open, and FIG. 4 shows a state in which the opening / closing door 38 is open and the opening / closing door 39 is closed.

Door packings 41 for sealing the connection-side opening 36 and the opening 37 are mounted on the outer peripheral portions of the inner surface of the opening / closing door 38 and the opening / closing door 39, respectively. The outer cart main body 34 has a heat insulating structure including a heat insulating material, and keeps the storage chamber 33 warm.

A striker 42 having a round bar-shaped engaging rod 42a that protrudes toward the latch portion 17 of the station 2 and engages with the latch portion 17 is fixed to two upper portions of the connection side opening 36 of the outer cart main body 34. There is. The striker 42 constitutes a part of the coupling device 4. The detected unit 43 is provided at the center of the left and right strikers 42 and at a position facing the cart detection unit 23.

The inner cart 32 includes a square inner cart main body 44 and a plurality of casters 45 fixed to the bottom surface of the inner cart main body 44. The inner cart main body 44 has a tray accommodating chamber 48 for accommodating the tray 46 on which food is placed in a multi-stage manner, and is open on the side facing the opening / closing doors 38 and 39 of the outer cart 31. A partition plate 47 into which the central portion of the tray 46 can be inserted is installed in a substantially central portion of the tray accommodating chamber 48, and a heat insulating material is sealed inside the partition plate 47. Further, when the inner cart 32 is stored in the outer cart 31, the partition plate 47 divides the space of the storage chamber 33 into left and right into a heating / cooling chamber 48a capable of heating food and a cooling chamber 48b for cooling and storing food. It is designed to do.

When the tray 46 on which the food is placed is stored, the food to be warmed and eaten is arranged on the left side of the partition plate 47, and the food to be eaten cold without heating is arranged on the right side of the partition plate 47. The partition plate 47 of the inner cart 32 faces the housing partition plate 26 of the station 2 and is in close contact with the partition packing 27. A door center packing 51 is attached to the inner surfaces of the opening / closing doors 38 and 39 of the outer cart 31 at positions facing the partition plate 47 of the inner cart 32 to seal the heating / cooling chamber 48a and the cooling chamber 48b.

<Operation example of food temperature control system 1>
An example of the actual operation of the food temperature control system 1 is described below.
With the opening / closing door 38 of the outer cart 31 open, when the connection side opening 36 is pushed into the housing opening 14 of the station 2 while being guided by the cart guide 52 of the station 2, the left and right strikers 42 move to the left and right latch portions. The door 17 is entered, locked in the meshed state, and the outer cart 31 is held in a state of being connected to the station 2.

When a plurality of trays 46 on which food is placed are stored in the inner cart 32 and the inner cart 32 is stored in the outer cart 31, the heating / cooling chamber 48a and the cooling chamber 48b partitioned by the partition plate 47 cool the heating / cooling unit 24 and the cooling chamber 48b. It is partitioned so as to communicate with the portion 25.

When it is determined by the connection determination means of the station 2 (details will be described later) that the cart 3 is completely connected, the station 2 can be operated. When the operation of the station 2 is started by a predetermined operation on the operation unit 28 of the station 2, the cooling operation is started, the first circulation fan and the second circulation fan are started, and the first cooler and the second cooler are started. The cooler is driven, and cold air circulates in both the heating / cooling chamber 48a and the cooling chamber 48b. As a result, the food contained in the heating / cooling chamber 48a and the food contained in the cooling chamber 48b are cooled and stored by cold air.

At the preset reheating start time, the reheating operation is started, the first cooler is stopped, the heater is switched to start, and hot air circulates in the heating / cooling chamber 48a. As a result, the food contained in the heating / cooling chamber 48a is heated by the hot air. At this time, cold air is continuously circulated in the cooling chamber 48b. In this way, the food temperature control system 1 is capable of simultaneous temperature control in which a part of the food is cooled and the other part is heated.

When the predetermined time elapses or the temperature of the meal reaches the predetermined temperature, the reheating operation is stopped, the circulation of hot air and cold air is stopped, and the food can be served. When the operator operates the release lever 18 to unlock the latch portion 17, the striker 42 is released from the latch portion 17, and the outer cart 31 is released from the station 2 together with the inner cart 32. By closing the opening / closing door 38, the food in the cart 3 can be transported and served while keeping it warm.

When the serving is completed, the worker returns the inner cart 32 and the outer cart 31 and cleans them respectively. When the washing is completed, the outer cart 31 is connected to the station 2 again by the latch portion 17, the inner cart 32 containing the next food is stored in the outer cart 31, and the operation of the station 2 is started until the next meal.

<Connecting device 4>
Next, the configuration of the coupling device 4 will be described. The coupling device 4 has a latch portion 17 on the station 2 side, a striker 42 on the cart 3 side, and a release mechanism 19 (see FIG. 13). As shown in FIG. 5, the latch portion 17 includes a horizontally long rectangular latch case 61, a latch plate 62 that engages with the striker 42, and a lock plate 63 that fixes the latch plate 62.

The latch case 61 is formed with a U-shaped notch 64 into which the engaging rod 42a of the striker 42 can enter, and the latch shaft 65 and the lock plate 63 on which the latch plates 62 rotate on both sides of the notch 64. Locking shafts 66 that rotate around are erected. The engaging rod 42a extends in the vertical direction and engages with a latch plate 62 extending in the horizontal direction substantially orthogonal to the extending direction (vertical direction) of the engaging rod 42a.

Specifically, the latch plate 62 includes a front arm 67 and a rear arm 68, and a fitting groove 69 for engaging the engaging rod 42a of the striker 42 is formed between them. A claw engaging portion 71 is formed on the rear arm 68.

The latch plate 62 has an "opening position" (see FIGS. 5 (b) and 6 (a)) in which the fitting groove 69 faces the opening direction of the notch 64, and the fitting groove 69 faces substantially perpendicular to the notch 64. It rotates with and from the "lock position" (see FIG. 6 (c)). The latch shaft 65 is provided with a latch coil spring 73 that rotationally urges the latch plate 62 toward the open position (see arrow 73a in FIG. 5B).

The lock plate 63 is formed in a vertically long shape so as to have a locking shaft 66 as a base end and a release operation portion 74 that functions as a detected portion of the latch detection unit 22 (see FIG. 10) at the tip end portion. There is. A claw portion 75 that projects toward the latch plate 62 and engages with the claw engaging portion 71 is formed at a substantially central portion of the lock plate 63.

The lock plate 63 has a "claw fitting position" (see FIG. 6 (c)) in which the claw portion 75 engages with the claw engaging portion 71 to hold the latch plate 62 in the locked state, and the claw portion 75 engages with the claw. It swings with the "release position" (see FIGS. 5 (b) and 6 (a)) that separates from the portion 71. The locking shaft 66 is provided with a locking coil spring 76 that rotates and urges the claw portion 75 of the lock plate 63 toward the latch plate 62 (see arrow 76a in FIG. 5B). When the latch plate 62 is not in the locked position, the claw portion 75 slides on the outer peripheral portion of the latch plate 62. The latch case 61 is fixed to the housing opening 14 of the station 2.

Hereinafter, the locking operation of the coupling device 4 will be described with reference to FIGS. 6 (a) to 6 (c) and FIG. 7. As shown in FIG. 7A, when the cart 3 (outer cart 31) is pushed toward the station 2, the engaging rod 42a of the striker 42 enters the fitting groove 69 of the latch plate 62, and the notch portion of the latch case 61 is formed. While being guided by 64, the latch plate 62 is rotated toward the lock position against the urging force of the latch coil spring 73 (see FIG. 6A).

When the cart 3 is further pushed in, the engaging rod 42a pushes the rear arm 68 of the latch plate 62 to rotate the latch plate 62 to the locked position (see FIG. 6B). When the latch plate 62 rotates to the lock position where the claw engaging portion 71 faces the claw portion 75, the lock plate 63 rotates to the claw fitting position by the urging force of the locking coil spring 76, and the claw portion 75 claws. It enters the engaging portion 71 (see FIG. 6 (c)). As a result, the claw portion 75 regulates the rotation of the latch plate 62 to the open position, and the latch plate 62 is held in the locked state.

As a result, the engaging rod 42a of the striker 42 is bitten by the notch 64 of the latch case 61 and the front arm 67 and the rear arm 68 (fitting groove 69) of the latch plate 62 and is firmly restrained. By engaging the striker 42 and the latch portion 17 so as to mesh with each other, the cart 3 (outer cart 31) is connected and held to the station 2 (see FIG. 7B).

In this way, the striker 42 is locked to the latch portion 17 by the operation of connecting the cart 3 by the operator, and the cart 3 is physically connected to the station 2 regardless of the presence or absence of a power supply or a signal. Therefore, the cart 3 does not separate from the station 2 even if there is a power failure or a malfunction of the control, and the temperature inside the cart 3 can be maintained to properly control the temperature of the food.

Next, the release operation of the coupling device 4 will be described with reference to FIGS. 6 (d) to 6 (f). When the release lever 18 of the station 2 is operated, as shown in FIG. 13, the release member 19a of the release mechanism 19 presses the release operation portion 74 of the lock plate 63 via the operation of the wire 21, and the lock plate 63 Is rotated to the release position (see FIG. 6D). As a result, the claw portion 75 of the lock plate 63 is disengaged from the claw engaging portion 71 of the rear arm 68, and the latch plate 62 is released from the locked state.

When the latch plate 62 is rotated to the open position by the urging force of the latch coil spring 73, the engaging rod 42a of the striker 42 that has been restrained is in a state of being opened forward (see FIG. 6E). As a result, the striker 42 can be detached forward, and the cart 3 (outer cart 31) can be detached and separated from the station 2 (see FIG. 6 (f)).

In this way, the release mechanism 19 is interlocked with the release lever 18 via the wire 21, and the latch portion 17 is released by a manual operation by the operator. Therefore, regardless of the presence or absence of the power supply and the signal, it is possible to prevent the latch portion 17 from being released due to an unexpected external cause.

<Arrangement position of latch portion 17 and striker 42>
As shown in FIG. 8, the latch portion 17 is fixed to the upper portion of the connection frame portion 15 protruding from the housing opening 14 of the station 2. The latch portion 17 may not be provided on the side portion or the lower portion of the connection frame portion 15. The latch portion 17 is fixed at two positions on the left and right of the upper plane of the connection frame portion 15, so that the latch plate 62 is located above the frame portion packing 16. In the locked state in which the latch plate 62 engages with the engaging rod 42a of the striker 42, the engaging position 77 of the striker 42 (more specifically, the position of the engaging rod 42a in the locked state) is the frame portion. It is located on the back side of the packing 16 from the front surface position 78.

<Installation of station 2>
The station 2 is installed vertically or slightly inclined to the back side from the vertical with respect to the floor surface 5 (see FIG. 7) to be installed. Therefore, the connection-side opening 36 of the cart 3 that travels and connects on the same floor surface 5 and the frame packing 16 of the station 2 are arranged in parallel or in a state where the upper portion is slightly expanded.

(A) When the station is installed perpendicular to the floor surface 5 (upright installation)
While being guided by the cart guide 52, the connection side opening 36 of the cart 3 (outer cart 31) and the connection frame portion 15 of the station 2 are brought close to each other in a parallel state. When the outer cart 31 is pushed into the connecting frame portion 15, the striker 42 is pushed into the latch portion 17 while compressing the frame portion packing 16, and the latch plate 62 rotates to the locked position to bite the engaging rod 42a of the striker 42. It is locked in a crowded state. As a result, the upper portion of the connection frame portion 15 of the station 2 is connected to the striker 42 of the outer cart 31.

The upper portion of the frame portion packing 16 is held in a substantially sealed state in a compressed state in which the pressing force is maintained by the latch portion 17. On the other hand, there is no connecting means in the lower portion of the frame portion packing 16, and the repulsive force of the frame portion packing 16 acts on the outer cart 31, and the lower portion of the outer cart 31 acts to incline outward.

However, a force (self-weight moment) that tries to wrap around the fixed striker 42 below the engaging position of the striker 42 acts on the lower portion of the connection side opening 36 of the outer cart 31. Therefore, the lower portion of the frame portion packing 16 is also connected in a substantially close contact state by the repulsive force of the frame portion packing 16 and the own weight moment of the outer cart 31. Therefore, the connection side opening 36 and the connection frame portion 15 of the cart 3 are maintained in substantially close contact with each other at both the upper part and the lower part. When the inner cart 32 is stored in the outer cart 31, the load of the inner cart 32 is further applied to the load of the outer cart 31. Therefore, the self-weight moment is acted more strongly, and the degree of adhesion can be further increased.

(B) When the station 2 is installed at a slight inclination toward the back side from the vertical with respect to the floor surface 5 (tilting type installation)
The connection-side opening 36 of the outer cart 31 is vertical, but since the lower portion of the frame portion packing 16 is located in front of the upper portion, the lower portion of the frame portion packing 16 is pressed more strongly, and the lower portion of the frame portion packing 16 is pressed. The degree of adhesion can be increased.

Further, since the position where the latch portion 17 is locked moves to the back side, the striker 42 located at the upper part of the outer cart 31 is fixed so as to be pulled toward the back side, and a force that tries to wrap around below the striker 42. (Self-weight moment) acts more strongly. In this way, the degree of adhesion of the lower portion of the frame portion packing 16 is increased, and the action of its own weight moment is strengthened. As a result, even if there is no latch portion below the connection frame portion 15, the entire connection frame portion 15 is more reliably maintained in a substantially close contact state.

(C) When the station 2 is installed at a slight inclination to the front side from the vertical with respect to the floor surface 5. The connection side opening 36 of the outer cart 31 is vertical, but the lower part of the frame portion packing 16 is behind the upper part. When the striker 42 is fixed to the latch portion 17, the upper portion of the frame portion packing 16 is pressed, but the lower portion of the frame portion packing 16 cannot be pressed as much as the upper portion. Therefore, the repulsive force of the lower portion of the frame portion packing 16 is also weak, and the degree of adhesion of the lower portion of the frame portion packing 16 becomes low, and the hot air and cold air inside the cart 3 are compared with the installation methods of the above (A) and (B). May leak. Further, since the striker 42 is fixed to the latch portion 17 before the repulsive force of the frame portion packing 16 is sufficiently applied, it is difficult for the lower portion of the outer cart 31 to tilt outward, and the above (A) and Compared with the installation method of (B) above, the force (self-weight moment) that the lower part of the outer cart 31 tries to wrap around below the engaging position of the striker 42 does not sufficiently act.

Hereinafter, the action of the self-weight moment described above in the cases (A) and (B) will be described in more detail with reference to FIG. In FIG. 9, the point a is the center of gravity on which the gravity Fa of the cart 3 acts, the point b is the action point of the resultant force Fb of the repulsive force that the cart 3 receives from the frame packing 16, and the point c is the cart 3. Is the point of action of the reaction force Fc received from the floor surface 5. Point d is a connection point between the station 2 and the cart 3 by the connecting device 4 (= latch portion 17 + striker 42). Note that FIG. 9 is described so that the magnitude of the tilt angle θ of the cart 3 is emphasized more than the tilt angle θ in actual use for convenience of explanation.

As shown in FIG. 9, the cart 3 has its own weight moment Ma due to gravity Fa (counterclockwise in FIG. 9), moment Mb due to the resultant force Fb (clockwise in FIG. 9), and moment Mc due to reaction force Fc. (Clockwise in FIG. 9) and, act at least around point d.

The larger the tilt angle θ of the cart 3, the larger the self-weight moment Ma. Further, as the inclination angle θ of the cart 3 becomes larger, the degree to which the frame packing 16 is crushed by the cart 3 becomes smaller, so that the resultant force Fb of the repulsive force becomes smaller and the moment Mb due to the resultant force Fb also becomes smaller. Further, as the inclination angle θ of the cart 3 is larger, the load applied to the floor surface 5 is reduced, the reaction force Fc applied in the direction in which the cart 3 fixed at the point d is lifted is smaller, and the moment Mc due to the reaction force Fc is also smaller. Become. That is, the larger the inclination angle θ of the cart 3, the larger the self-weight moment Ma, and the smaller the sum (Mb + Mc) of the moment Mb and the moment Mc. The opposite is true when the tilt angle θ of the cart 3 is small.

As a result, when the cart 3 and the station 2 are connected as shown in FIG. 7B, the cart 3 has a position (Ma = Mb + Mc) in which the self-weight moment Ma and the sum of the moment Mb and the moment Mc are equal. It naturally rotates around the latch portion 17 (point d) due to its own weight up to the inclination angle θ). In the figure, α is the angle (standing angle) formed by the line segment ad and the direction of gravity Fa when the tilt angle θ is zero, and β is the line segment cd when the tilt angle θ is zero. The angle between the direction of the reaction force Fc and the direction of the reaction force Fc (standing angle).

Here, since the gravity Fa acting on the cart 3 is usually sufficiently larger than the repulsive force (combined force Fb) of the frame portion packing 16, the self-weight moment Ma is sufficiently larger than the moment Mb (Ma >> Mb). Also, normally, the gravity Fa and the reaction force Fc are substantially the same magnitude, but since the standing angle α is sufficiently larger than β (α >> β), the self-weight moment Ma is sufficiently larger than the moment Mc. It becomes larger (Ma >> Mc).

Therefore, in the case of the installation method (A) described above, the cart 3 usually rotates around the point d by its own weight until the frame packing 16 is sufficiently pressed and the inclination angle θ becomes close to zero. As a result, the connection frame portion 15 of the station 2 and the connection side opening 36 of the cart 3 are sufficiently brought into close contact with each other.

Further, in the case of the installation method of the above (B), the connection point between the station 2 and the cart 3 by the connecting device 4 (= latch portion 17 + striker 42) moves from the point d to the point e, so that the above (A) Compared with the case, the inclination angle θ of the cart 3 becomes larger. Therefore, the self-weight moment Ma is further increased as compared with the case of (A) above. As a result, the connection frame portion 15 of the station 2 and the connection side opening 36 of the cart 3 are more firmly adhered to each other.

<Connection determination means>
Next, the connection determination of the cart by the connection determination means of the station 2 will be described with reference to FIGS. 10 to 12. The connection determination means determines the connection by the latch detection unit 22 and the cart detection unit 23.

As shown in FIGS. 10 and 11, the latch detection unit 22 detects the swinging operation of the lock plate 63 (particularly, the release operation unit 74) linked to the rotation of the latch plate 62, and the left and right latches. It is installed in each of the parts 17.

The latch detection unit 22 uses a non-contact type proximity switch. The detection areas Y and Z of the proximity switch are arranged so as to cross the swing locus of the lock plate 63 (release operation unit 74). When the latch plate 62 is in the open position or the locked position, the lock plate 63 (release operation unit 74) is in a state of being tilted toward the latch plate 62, so that it comes out of the detection areas Y and Z. ing.

When the latch plate 62 starts to rotate due to the pressing of the striker 42, the lock plate 63 (release operation unit 74) invades the detection areas Y and Z and is detected. Therefore, the striker 42 invades the inside of the latch portion 17 and locks. It will be detected that it is in the state before it is done.

For example, before the striker 42 enters the inside of the latch portion 17, or in a state where the striker 42 is completely locked to the latch portion 17, the latch plate 63 (release operation portion 74) is not provided in the detection areas Y and Z. The detection unit 22 is turned “ON”, and while the striker 42 is invading the inside of the latch unit 17, the lock plate 63 (release operation unit 74) swings and enters the detection areas Y and Z, thereby latching. The detection unit 22 is turned "OFF".

The cart detection unit 23 is fixed to the connection frame unit 15 of the station 2 via a bracket. The cart detection unit 23 uses a non-contact type proximity switch. The detection area X of the proximity switch is arranged toward the front from the connection frame portion 15, and when the detected unit 43 of the cart 3 invades the detection area X of the proximity switch, the cart detection unit 23 can detect the cart 3. It has become like. In this way, it is detected that the cart 3 is approaching within a predetermined distance.

For example, when there is no detected unit 43 of the cart 3 in the detection area X, the cart detection unit 23 is “OFF”, and when there is a detected unit 43 in the detection area X, the cart detection unit 23 is [ON]. .. Then, the connection determination means determines that the cart 3 is completely connected to the station 2 when the cart detection unit 23 is "ON" and both of the two latch detection units 22 are "ON". It has become.

In the present embodiment, one cart detection unit 23 is installed in the middle portion between the left and right latch portions 17. However, a plurality of cart detection units 23 may be installed at a place to be detected. For example, if the cart detection units 23 are installed at four locations on the top, bottom, left, and right, the connection status can be accurately detected. However, in this case, although the detection is accurate, the adjustment due to the setting of the detection area or the change in the installation condition becomes complicated, and the adjustment may be difficult.

The detection area X of the cart detection unit 23 is adjusted so as to detect the cart 3 when the striker 42 invades the latch unit 17. That is, initially, the latch detection unit 22 is "ON" and the cart detection unit 23 is "OFF", but even if the cart 3 approaches and the cart detection unit 23 is "ON", the striker is applied to the latch unit 17. Since the latch detection unit 22 is turned "OFF" due to the intrusion of the 42, it is possible to prevent all the detection units from being turned "ON" before the connection is completed, and it is possible to prevent erroneous determination. .. By adjusting the detection area in this way, the connection of the cart 3 can be accurately determined.

Specifically, as shown in FIG. 12, the connection determination means is when all three of the cart detection unit 23 and the two latch detection units 22 are turned “ON” (steps S1, S2, S3). In "YES"), it is determined that the cart 3 is connected to the station 2 (step S4).

When the carts 3 are completely separated, the detected unit 43 of the cart 3 does not exist in the detection area X of the cart detection unit 23, and the cart detection unit 23 is “OFF” (“NO” in step S1. ”), It is determined that the cart 3 is separated from the station 2 (not connected) (step S5).

When the cart 3 approaches the station 2, the detected unit 43 of the cart 3 invades the detection area X and the cart detection unit 23 becomes “ON” (“YES” in step S1), but the striker 42 latches. Since the latch plate 62 is rotated by entering the unit 17, the lock plate 63 (release operation unit 74) swings and the latch detection unit 22 becomes “OFF” (“NO” in steps S2 and S3), and is not connected. Is determined (step S5).

Further, when the cart 3 is pushed toward the station 2 and the cart 3 is completely connected to the station 2, the lock plate 63 (release operation unit 74) falls toward the latch plate 62 and is locked, thereby detecting the latch. Since the unit 22 is turned “ON” again (“YES” in steps S2 and S3) and the cart detection unit 23 is also maintained at “ON” (“YES” in step S1), it is determined that the cart 3 is connected. (Step S4).

With such a determination method, even if the cart 3 is close to the station 2, if the striker 42 is not completely locked, the latch detection unit 22 is turned “OFF” and the cart 3 is not connected. Therefore, it is possible to prevent the operation of the station 2 from being accidentally started.

<When cart 3 invades without tilting>
Hereinafter, as a specific example, as shown in FIG. 10, the transition of the detection results of the latch detection unit 22 and the cart detection unit 23 when the cart 3 is pushed toward the station 2 in a state where the cart 3 is not tilted with respect to the station 2. explain.

First, as shown in FIG. 10A, when the striker 42 is not pushed into both of the latch portions 17 on both sides, the cart detection unit 23 is “OFF” because the cart 3 is not yet detected (step). “NO” in S1), and it is determined that the connection is not established (step S5). In this state, both the latch detection units 22 on both sides are "ON".

When the cart 3 is pushed in from this state, as shown in FIG. 10B, the cart 3 approaches the station 2, the detected unit 43 of the cart 3 invades the detection area X, and the cart detection unit 23 becomes ". Although it becomes "ON" ("YES" in step S1), the striker 42 invades the latch portion 17 and turns the latch plate 62, so that the lock plate 63 (release operation portion 74) swings and the latch detection unit 22 moves. It becomes "OFF" ("NO" in steps S2 and S3), and it is determined that the connection is not established (step S5).

From this state, when the cart 3 is further pushed in and the latch portions 17 on both sides are locked, the cart detection unit 23 remains “ON” as shown in FIG. 10 (c) (“YES” in step S1. ”), The latch detection units 22 on both sides are turned“ ON ”(“ YES ”in steps S2 and S3). As a result, it is determined that the cart 3 is connected (step S4).

<When the cart 3 tilts diagonally and invades>
Next, as another specific example, as shown in FIG. 11, the transition of the detection results of the latch detection unit 22 and the cart detection unit 23 when the cart 3 is pushed toward the station 2 in a state of being tilted at an angle will be described. ..

For example, as shown in FIG. 11A, when the right latch portion 17 is connected first, only the right latch portion 17 is locked, and the striker 42 is not pushed into the left latch portion 17 at an angle. It will be connected. At this time, as shown in FIG. 11A, the cart detection unit 23 is “OFF” (“NO” in step S1) because the cart 3 has not been detected yet, and is determined to be unconnected (step S5). .. In this state, both the latch detection units 22 on both sides are "ON".

When the left side of the cart 3 is pushed in from this state, the cart 3 approaches further and the cart detection unit becomes “ON” (“YES” in step S1), as shown in FIG. 11 (b). However, since the striker 42 on the left side enters the latch portion 17 on the left side and the latch detection unit 22 on the left side is “OFF” (“NO” in step S2), it is continuously determined that the connection is not established (step S5).

From this state, when the cart 3 is further pushed in and the latch portion 17 on the left side is also locked, the cart detection unit 23 remains “ON” as shown in FIG. 11 (c) (“YES” in step S1. ”), The left latch detection unit 22 is also turned “ON” (“YES” in step S2). Further, the latch detection unit 22 on the right side remains “ON” (“Yes” in step S3). Therefore, since all the detection units are turned “ON” (“YES” in steps S1, S2 and S3), it is determined that the cart 3 is connected (step S4).

If the cart detection unit 23 whose detection area is adjusted is installed at one location in the center of the left and right latch portions 17 as described above, the same determination is made regardless of whether the cart 3 approaches from the left or right side. be able to.

When the cart detection unit 23 is in the center, the distance to the left latch portion 17 and the distance to the right latch portion 17 are the same. Therefore, even if the cart 3 is connected from the left side first, the cart 3 has the same effect. The connection status of can be determined. Therefore, no matter which direction the cart 3 is connected to, the connection determination of the cart 3 can be accurately performed with a small number of detection units.

<Action / effect>
As described above, according to the food temperature control system 1 according to the embodiment of the present invention, the movable cart 3 having the storage chamber 33 for accommodating the food and the storage chamber 33 of the cart 3 are filled with air for controlling the temperature of the food. The supply station 2 is mechanically connected or separated by a coupling device 4 using a latch mechanism. The food temperature control system 1 having this configuration is mechanically connected or separated by a latch mechanism, unlike a conventional system that electrically connects or separates. Therefore, it is possible to prevent an unintended disconnection due to a power failure or the like. Therefore, the food temperature control system 1 having the present configuration can suppress an unintended separation between the cart 3 and the station 2.

Further, in a conventional food temperature control system, precise alignment between a cart and a station is usually required in order to properly operate a connecting device using an electromagnet. On the other hand, in the food temperature control system 1 having the above configuration, since the cart 3 and the station 2 are mechanically connected by using the latch mechanism, the positions of the cart 3 and the station 2 are compared with those of the conventional food temperature control system. Wide tolerance for error. Therefore, the food temperature control system 1 having the above configuration is superior in workability when attaching / detaching the cart 3 and the station 2 during actual use, as compared with the conventional food temperature control system.

Further, according to the food temperature control system 1, the connecting device 4 is a release unit (release) for releasing the connection between the latch portion 17 provided in the station 2, the striker 42 provided in the cart 3, and the cart 3 and the station 2. It has a lever 18, a release mechanism 19, and a wire 21). Therefore, by bringing one of the cart 3 and the station 2 closer to the other, both can be connected. Therefore, the food temperature control system 1 having this configuration is excellent in workability when connected.

Further, according to the food temperature control system 1, the installation is such that the upper portion of the connection frame portion 15 of the station 2 is located away from the cart 3 (tilting installation), or the connection frame portion of the station 2 is installed. The cart 3 is connected to the station 2 placed on the floor surface 5 by an installation (upright installation) in which the upper part of the 15 is located at the same position with respect to the cart 3. At this time, the cart 3 and the station 2 are connected by a connecting device 4 provided above the contact point between the connection frame portion 15 of the station 2 and the connection side opening 36 of the cart 3. Here, since the center of gravity of the cart 3 is located below the connection point closer to the floor surface 5, the moment (own weight moment) in the direction in which the cart 3 approaches the station 2 around the connection point is the cart 3. Will occur in. As a result, if the cart 3 and the station 2 are connected above the contact point, the cart 3 moves in a direction approaching the station 2 by its own weight. Therefore, the cart 3 and the station 2 can be properly connected without providing a connecting device at a position other than above the contact point.

Further, according to the food temperature control system 1, when the cart 3 and the station 2 are connected, the weight of the cart 3 is used, and the cart is attached to the frame packing 16 provided on the peripheral edge of the connection frame 15 of the station 2. The peripheral edge of the connection side opening 36 of 3 can be pressed. As a result, when air for temperature control is supplied from the station 2 to the storage chamber 33 of the cart 3, air leakage or the like can be suppressed and the temperature of the food can be properly controlled.

<Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

In the above embodiment, as shown in FIG. 13, a latch portion 17 and a release lever 18 are provided on the station 2, a striker 42 is provided on the cart 3, and the latch portion 17 of the station 2 engages and holds the striker 42 of the cart 3. It is configured to fix the cart 3. In this way, by mounting the latch portion 17, which has a complicated structure and mechanism, on the station 2 which is always stationary, problems due to vibration of the cart 3 are prevented, and the weight increase of the cart 3 and the complicated structure are avoided. can do. In addition, the tension of the wire 21 connecting the latch portion 17 and the release lever 18 can be maintained at an appropriate value for a long time.

On the other hand, as shown in FIG. 14, the striker 42 may be provided in the station 2, and the latch portion 17 and the release lever 18 may be provided in the cart 3. In the example shown in FIG. 14, a latch portion 17 is provided on the connection surface of the cart 3, a release lever 18 is provided on the side of the cart 3 opposite to the connection surface, and both are interlocked by a wire 21. .. As described above, since the release lever 18, the wire 21, and the latch portion 17 are configured in the cart 3, maintenance is facilitated. Further, since the release lever 18 is attached to the operator side, the operator does not have to extend his / her body and arms to the station 2 to operate, and the cart 3 can be detached in a comfortable posture, improving workability.

Further, as shown in FIG. 15, even if the latch portion 17 is provided in the station 2 and the striker 42 is provided in the cart 3 as in FIG. 13, the release lever 18 is provided in the cart 3. Good. In the example shown in FIG. 15, the end of the wire 21 on the station 2 side and the end of the wire 21 on the cart 3 side can be connected to each other by the wire connecting portion 21a. When the cart 3 is connected to the station 2, the operation of the wire 21 on the cart 3 side is transmitted to the latch portion 17 on the station 2 side. As a result, it is possible to prevent the latch portion 17 from malfunctioning due to the vibration of the cart 3 and to maintain good workability of the detachment operation.

Further, in the above embodiment, the latch portion 17 is released by operating the wire 21. On the other hand, an actuator for operating the lock plate 63 of the latch portion 17 may be provided, and the control unit may output a signal to the actuator to extend the actuator to release the lock plate 63 of the latch portion 17. As a result, the operator can release the latch portion 17 by pressing a button on the operation unit, time-up of the timer, or the like, and the latch portion 17 can be automatically released without human intervention.

Here, the features of the above-described embodiments of the food temperature control system 1 according to the present invention are briefly summarized and listed below [1] to [4], respectively.
[1]
A movable cart (3) having an internal space (33) for accommodating food, and
A station (2) that supplies air for controlling the temperature of the food to the internal space (33),
A coupling device (4) for connecting or disconnecting the cart (3) and the station (2) using a latch mechanism (17) is provided.
Food temperature control system (1).
[2]
In the food temperature control system (1) described in the above [1],
The connecting device (4)
A striker (42) provided on one of the cart (3) and the station (2),
A latch portion (17) provided on the other side of the cart (3) and the station (2) and holding the striker (42) by engaging with the striker (42).
It has a release portion (18, 19, 21) that disengages the latch portion (17) from engaging with the striker (42).
Food temperature control system (1).
[3]
In the food temperature control system (1) according to the above [1] or the above [2],
The cart (3)
It has an opening (36) communicating with the internal space (33).
The station (2)
The cart (3) has an annular connecting frame portion (15) that abuts on the peripheral edge of the opening (36) when connected by the connecting device (4), and the upper portion of the connecting frame portion (15) is higher than the lower portion. It is configured so that it can be tilted so that it is tilted away from it, or it can be installed upright so that the lower part and the upper part are in the same position with respect to the cart (3).
The connecting device (4)
It is provided above the contact point between the peripheral edge of the opening (36) and the connection frame portion (15).
Food temperature control system (1).
[4]
In the food temperature control system (1) described in the above [3],
The station (2)
A packing (16) for sealing the contact portion is provided on the peripheral edge of the connection frame portion (15).
The connecting device (4)
Provided above the packing (16)
The cart (3)
When connected by the connecting device (4), the peripheral edge of the opening (36) is held in a state of being pressed against the packing (16) by the weight of the cart (3).
Food temperature control system (1).

1 Food temperature control system 2 Station 3 Cart 4 Connecting device 5 Floor surface 15 Connection frame part 16 Frame part packing (packing)
17 Latch part 18 Release lever (release part)
19 Release mechanism (release part)
21 wire (release part)
33 Storage room (internal space)
36 Connection side opening (opening)
42 striker 42a engaging rod

Claims (4)

A movable cart with an internal space to store food,
A station that supplies air for controlling the temperature of the food to the internal space,
A coupling device that connects or separates the cart from the station using a latch mechanism.
Food temperature control system. In the food temperature control system according to claim 1,
The connecting device is
A striker provided on one of the cart and the station,
A latch portion provided on the other side of the cart and the station and holding the striker by engaging with the striker.
It has a release portion that disengages the latch portion from engaging with the striker.
Food temperature control system. In the food temperature control system according to claim 1 or 2.
The cart
It has an opening that communicates with the internal space.
The station
An inclined installation having an annular connecting frame portion that comes into contact with the peripheral edge of the opening when connected by the connecting device, and tilted so that the upper portion of the connecting frame portion is located away from the cart, or The lower part and the upper part are configured to be upright so that they are in the same position with respect to the cart.
The connecting device is
Provided above the contact point between the peripheral edge of the opening and the connection frame.
Food temperature control system. In the food temperature control system according to claim 3,
The station
A packing for sealing the contact portion is provided on the peripheral edge of the connection frame portion.
The connecting device is
Provided above the packing
The cart
When connected by the connecting device, the peripheral edge of the opening is held in a state of being pressed against the packing by the weight of the cart.
Food temperature control system.

Images