JP2016035338A - Cool/hot storage device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a duct in which a telescopic passage for connecting a heat exchange chamber below a station and a storage chamber for a cart is provided from returning to an elevated position accidentally.SOLUTION: On a lower surface side of a ceiling wall of a station 40, a duct in which a telescopic ventilation flue for connecting a heat exchange chamber side communication port and a storage chamber side communication port 32, 33, which are oppositely provided, with each other is provided is disposed, so that it can be elevated/lowered in such a manner that an upper end of each ventilation flue is fixed to the heat exchange chamber side communication port. The duct is suspended and supported by being upwardly energized by an elastic member, while a cam shaft 90 is provided which has a cam for coming into contact with the duct and which lowers the duct against an energization force by the rotation around a shaft center, and also a lock part is provided which locks the cam shaft 90 at a lowering operation position. At ane end part of the cam shaft 90, an operation lever 95 for rotationally operating the cam shaft 90 around the shaft center is detachably mounted by a one-touch attachment/detachment mechanism.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a refrigerated apparatus that can be stored after both hot and cold foods are refrigerated and then reheated and the cold food can be subsequently refrigerated and removed.

Conventionally, as an example of this kind of refrigeration apparatus, the thing of the following patent document 1 is known. This is composed of a cart made of insulated boxes with casters for storing trays, and a stationary station equipped with a cooling part and a heating part for storing the above-mentioned cart so that it can be inserted and removed from the front opening. Yes.
The interior of the cart is partitioned into a warm room and a cold room by a partition wall, and a tray is stored in a plurality of stages in a form extending through the partition wall and extending between the warm room and the cold room. A first heat exchange chamber equipped with a cooling unit, a heating unit, and a circulation fan and a second heat exchange chamber equipped with a cooling unit and a circulation fan are partitioned and formed side by side on the ceiling of the station.

When the cart is stored in the station, an air circulation path is individually formed between the first heat exchange chamber and the cold storage chamber and between the second heat exchange chamber and the cold storage chamber. ing. Therefore, first, the heat exchange chamber side entrance and the storage chamber side entrance are provided facing the lower surface of the ceiling wall of the station and the upper surface of the cart.
On the other hand, on the lower surface side of the ceiling wall of the station, a duct provided with an expandable / contracting air passage connecting the opposing heat exchange chamber side vent and the storage chamber side vent is provided at the upper end of each vent passage. A lower position where the lower end of each ventilation path is in close contact with the storage chamber side outlet, and a rising position separated above the storage chamber side outlet, while being arranged to be movable up and down in a form fixed to the side outlet An elevating mechanism for elevating and lowering is provided.
Specifically, the elevating mechanism part is supported by the spring being lifted and biased by a spring, and a camshaft for lowering the duct against the biasing force is moved around the axis by an operating lever provided at one end. It is provided so as to be rotatable and lockable to the lowering operation position.

The refrigeration / cooling apparatus is used in such a manner that when the cart is stored in the station with the duct released to the raised position and then the camshaft is rotated in one direction by the operation lever, the duct resists the urging force. As a result of being lowered and locked to the lowered position, the heat exchange chamber side outlet and the storage chamber side outlet are connected via a duct (ventilation path), and between the first heat exchange chamber and the warming chamber. A separate air circulation path is formed between the second heat exchange chamber and the refrigerator compartment.
The operation is started in this state. First, the cooling unit is operated in both heat exchange chambers, and cold air is circulated and supplied to both the hot and cold rooms, so that both hot and cold foods placed on the tray are refrigerated. Saved (tilde saved). When the predetermined time before the serving time comes, the cooling unit is switched to the heating unit in the first heat exchange chamber, while the cooling unit is continuously operated in the second heat exchange chamber, and the warming chamber is warmed up. The hot food is reheated by circulating the hot water, while the cold food continues to be refrigerated on the cold room side. When the catering time is reached, the operation is stopped, and then the camshaft is rotated in the other direction by the operation lever, so that the duct is returned to the raised position while being unlocked, and then the cart is pulled out from the station. It is designed for serving.

JP 2014-40930 A

As described above, it is essential that the duct be in the lowered position during operation, but during operation, the operation lever is inadvertently or mistakenly moved to the raised position. It cannot be said that there is no possibility. If it does so, since an air circulation path will be interrupted, regular cooling and heating cannot be performed, leading to a situation in which preparation for school lunch becomes impossible.
The present invention has been completed based on the above circumstances, and an object thereof is to prevent the duct from inadvertently returning to the raised position.

  The present invention provides a heat insulating box that is partitioned into a warm room and a cold room by a partition wall, and is stored in a plurality of stages in such a manner that a tray passes through the partition wall and spans the warm room and the cold room. A cart made of plastic, a first heat exchange chamber equipped with a cooling means and a heating means, and a second heat exchange chamber equipped with a cooling means are stored in the horizontal direction on the ceiling wall. And a station that is partitioned and formed in a row, and when the cart is stored in the station, between the first heat exchange chamber and the warming chamber, the second heat exchange chamber, and the A separate air circulation path is formed between the refrigerator compartments, and these air circulation paths are provided on the heat exchange chamber side opening provided facing the lower surface of the ceiling wall of the station and the upper surface of the cart. It is configured by connecting the storage room side entrance And a cooling / heating apparatus provided with a control means for controlling the operation of the cooling means and the heating means, wherein the opposite surface of the ceiling wall of the station is provided with an opening through the facing heat exchange chamber side. A duct provided with an expandable / contractable ventilation path connecting the storage chamber side vents is disposed so as to be movable up and down in a form in which an upper end of each ventilation channel is fixed to the heat exchange chamber side vent. An elevating mechanism for moving up and down between a lowered position where the lower end of each ventilation path is in close contact with the storage chamber side outlet and an elevated position where the lower end of each ventilation path is spaced above the storage chamber side outlet The elevating mechanism is provided with a cam that abuts against the duct and is supported by being suspended by an elastic member. A camshaft that moves down against the The camshaft is provided with a lock portion for locking the camshaft at the lowering operation position, and an operating lever for rotating the camshaft about its axis is provided at the end of the camshaft. It is characterized in that it is detachably attached by a one-touch attachment / detachment mechanism.

  During operation, the control lever is rotated in one direction, the duct is lowered by the cam function of the cam shaft and locked in the lowered position, and the control lever is rotated in the opposite direction when the cart is taken in and out of the station. By doing so, the duct is allowed to escape to the raised position by the urging force. If the operation lever is removed after locking the duct in the lowered position, the duct is prevented from being inadvertently returned to the raised position during operation. As a result, an appropriate school lunch can be provided.

The following configuration may also be used.
(1) At an upper position of the front opening of the station, an operation panel provided with a driving operation switch or the like is stretched so as to cover the duct, and the camshaft penetrates the operation panel. The operation lever is detachably attached to an end portion of the cam shaft that protrudes in front of the operation panel.
Since the operation lever can be attached and detached on the operation panel where the operation switch is arranged, it is easy to use.

(2) In the one-touch attachment / detachment mechanism, the end of the cam shaft is formed in an irregular cross section, while the end of the cam lever is fitted in an irregular cross section in which the end is aligned and fitted. It is configured by forming a joint hole.
A one-touch attachment / detachment mechanism can be constructed with a very simple structure, such as fitting between irregular sections, and it can be handled at low cost.

(3) In the one-touch mechanism portion, a through hole into which the base end portion of the operation lever can be inserted is formed in the end portion of the cam shaft, and the through hole is formed in the base end portion of the operation lever. A stopper hitting one of the hole edges and a locking claw elastically locking to the other hole edge of the through hole are provided.
The attachment / detachment operation can be easily performed, and the holding force at the time of attachment is excellent.

(4) A duct detection unit that detects whether or not the duct is in the lowered position, and when the duct detection unit detects that the duct is not in the lowered position during operation of the refrigeration apparatus. And an operation control unit that stops the operation.
If the operation lever is removed after starting the operation when the duct returns to the ascending position, it is avoided that the duct is inadvertently returned to the ascending position during operation. It is possible to prevent the operation from being interrupted accidentally.

  According to the present invention, it is possible to prevent the duct from inadvertently returning to the raised position.

1 is an exploded perspective view of a refrigeration apparatus according to Embodiment 1 of the present invention. Front sectional view of the cart stored in the station A perspective view seen from below the station Partial cutaway perspective view showing the outer shell of the station Refrigeration circuit diagram Perspective view of lifting duct Plan view Partially cutaway perspective view showing mounting structure of camshaft and control lever Sectional drawing which shows the case where a raising / lowering duct exists in a raise position Sectional drawing which shows the state which the raising / lowering duct fell to the maximum Sectional drawing which shows the state in which the raising / lowering duct was locked to the falling position Partially cutaway front view showing the state of the refrigerator before operation Partially cutaway plan view showing a structure for attaching and detaching an operation lever according to Embodiment 2 Top view when wearing Sectional drawing which shows the operation stop mechanism which concerns on Embodiment 3. A perspective view of a connecting portion of a connecting plate according to related technology Sectional view when tightening screws Cross-sectional view of a loose screw

<Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, a refrigeration / heating apparatus suitable for serving meals in a hospital or the like is illustrated. As shown in FIGS. 1 to 3, the cart 10 for storing the tray T and the tray 10 are placed on the tray T. The station 40 is provided with a means for cooling and heating the prepared food and accommodates the cart 10 in a removable manner.
The cart 10 includes a cart main body 11 formed of a heat insulating box and a frame cart 20 that stores the tray T. Both the front and rear sides of the cart main body 11 are open, and a double-spread type heat insulating door 12 is attached to each of the cart main bodies 11 and a caster 13 is provided on the bottom surface. A handle 14 for pushing or pulling the cart body 11 is provided on the left and right side edges of the front surface of the cart body 11.

The frame cart 20 has a structure in which metal frames 23 are raised from the left and right side edges of the bottom plate 21 provided with casters 22, and can be inserted into and removed from the front side of the cart body 11. A heat insulating partition wall 24 formed by stacking a plurality of unit partition walls 24A is provided at a substantially central portion in the left-right direction of the frame cart 20, and a tray receiver is provided on the inner surface of each frame 23. 25 is provided over a plurality of stages.
The tray T is formed in a horizontally long rectangular shape with synthetic resin or the like, and mounting portions Ta and Tb for hot food and cold food are formed on both sides of the boundary portion. The tray T is inserted from both the front and rear sides while the boundary portion penetrates the partition wall 24 and both side edges are received by the tray receiver 25, and is stored in a plurality of stages on both the front and rear sides of the depth. Yes.

In the state where the frame cart 20 is stored in the cart body 11, as shown in FIG. 2, the interior of the cart body 11 is partitioned to the left and right by the partition wall 24, and the warming room 30H on the left side as viewed from the front of the partition wall 24. However, the refrigerator compartment 30C is formed on the right side.
As will be described later, cold air or warm air generated on the station 40 side is individually circulated and supplied to the warm storage room 30H and the cold storage room 30C. For this reason, air flow passages 31 are formed on the left and right side walls of the cart main body 11 respectively, and air outlets 31A (FIG. 1) are formed on the inner surface of each air flow passage 31 in a plurality of stages. Yes.
At the left and right side edge portions of the ceiling wall of the cart body 11, elongated outlets 32 are formed in the front-rear direction so as to communicate with the upper ends of the air flow passages 31. Each outlet 32 is divided into four parts. On the other hand, a suction passage 33 is formed in the central portion of the ceiling wall to communicate with the warm room 30H or the cold room 30C individually.

Next, the structure of the station 40 will be described. As shown in FIGS. 1 to 4, the station 40 has a box shape in which a front surface and a bottom surface are opened, and is always installed at a fixed position.
Inside the station 40, there is provided a storage chamber 42 in which the above-described cart 10 can be taken in and out from the front entrance 41. Two heat exchange chambers 45 are formed in the ceiling portion of the storage chamber 42 so as to be divided into left and right sides. As shown in FIG. 2, when the cart 10 is properly stored in the storage chamber 42, the first heat exchange chamber 45 </ b> H on the left side when viewed from the front is a warm storage room that is partitioned in the left region in the cart 10. The second heat exchange chamber 45 </ b> C on the right side corresponds to a position directly above 30 </ b> H, and corresponds to a position directly above the refrigerating room 30 </ b> C formed on the right side in the cart 10.
An operation panel 46 provided with an operation unit 46A provided with operation switches and the like is stretched on the front surface of the heat exchange chambers 45H and 45C, and the lower edge of the operation panel 46 is positioned immediately above the upper surface of the cart 10. It is formed so as to be extended.

In FIG. 2 again, the two heat exchange chambers 45H and 45C are each divided into two layers of an upper chamber and a lower chamber.
In each of the upper chambers of the first heat exchange chamber 45H and the second heat exchange chamber 45C, a first cooler 51H and a second cooler 51C, which are cooling means, are disposed in the back region as viewed from the front. (See FIG. 5). An introduction port 52 is opened on the bottom surface of the area on the near side of the coolers 51H and 51C, and a circulation fan 53 is arranged on the upper surface of each introduction port 52.
As shown in FIG. 5, the two coolers 51H and 51C are connected in parallel with the expansion valves 54H and 54C connected in series, and are circulated by the compressor 56, the condenser 56 with the condenser fan 56A, and the refrigerant pipe 57. The refrigeration circuit 50 is configured by being connected. A refrigeration apparatus 58 including a compressor 55, a condenser 56, and expansion valves 54H and 54C is installed in a machine chamber 47 provided on the heat exchange chamber 45 as shown in FIG. A switching valve 59 is provided in the refrigerant inflow pipe 57H to the first cooler 51H.

When the refrigeration apparatus 58 is driven, if the switching valve 59 is open, both coolers 51H and 51C are in a state capable of exhibiting a cooling function, and if the switching valve 59 is closed, the second cooling is performed. Only the vessel 51C is in a state where the cooling function can be exhibited. Further, by individually controlling on-off valves (not shown) provided in the refrigerant inflow pipes 57H and 57C to the respective coolers 51H and 51C, the refrigerant flows to and stops from the respective coolers 51H and 51C. That is, the performance and stoppage of the cooling function are controlled.
The upper chamber of the first heat exchange chamber 45H is equipped with a heater 60 as a heating means in addition to the cooler 51H. The heater 60 is formed in a cylindrical shape as a whole, and is arranged so as to fit outside the circulation fan 53.

Although not shown in detail in the lower chambers of the first heat exchange chamber 45H and the second heat exchange chamber 45C, the air in the warm room 30H or the cold room 30C is introduced into the upper room through the inlet 52, respectively. In addition, a flow path 61 (FIG. 2) is formed for leading the cool air or warm air from the upper chamber to the warm chamber 30H or the cold chamber 30C.
A strip-shaped lead-out outlet at a position close to the left and right side edges of the bottom surfaces of the first heat exchange chamber 45H and the second heat exchange chamber 45C, that is, at a position corresponding to the outlet 32 of the warm room 30H and the cold room 30C. 62 is formed. The outlet port 62 is an outlet of a flow path 61 provided in the lower chamber.

The heat exchangers 45H and 45C are introduced at positions near the edges on the side close to the adjacent heat exchanger 45, in other words, at positions corresponding to the inlets 33 of the warmer compartment 30H and the refrigerator compartment 30C of the cart 10. A through-hole 63 is formed, and the introduction through-hole 63 serves as an inlet of a flow path 61 provided in the lower chamber.
Then, as will be described later, the openings 62 and 63 opened on the lower surfaces of the heat exchange chambers 45H and 45C of the station 40 and the ceiling walls of the warming room 30H and the refrigerating room 30C of the cart 10 were opened. The passages 32 and 33 are connected to each other through a ventilation path described later, so that the first heat exchange chamber 45H and the warm storage chamber 30H, and the second heat exchange chamber 45C and the cold storage chamber 30C, respectively. Thus, the individual air circulation paths 65H and 65C provided with the circulation fan 53 are formed.

Next, in order to form the above-described air circulation paths 65H and 65C, the passages 62 and 63 on the heat exchange chambers 45H and 45C side and the passages 32 and 33 of the warm chamber 30H and the refrigerator compartment 30C are connected to each other. The structure will be described.
A lifting duct 70 is disposed below the ceiling surface of the station 40. As shown in FIGS. 6 and 7, the elevating duct 70 includes a duct body 71 having a shallow box shape with a top opening, and the above-described heat exchange chambers 45H and 45C side openings 62 and 63 and the warming chamber 30H. A total of four connection openings 72 are formed in the arrangement corresponding to the through holes 32 and 33 on the refrigerator compartment 30C side.
A packing 75 is attached to each connection opening 72. This packing 75 is made of a rubber material, and has a sealing portion 77 (see FIG. 9) at the lower end of a rectangular cylindrical packing body 76 (corresponding to the above-mentioned “ventilation path” of the present invention) following the shape of the connection opening 72. Are integrally formed.

More specifically, as shown in FIG. 9, the packing body 76 is formed in an accordion shape so as to be expandable and contractable along the axial direction, and flanges 78A and 78B are formed at both upper and lower ends thereof. The lower flange 78B is formed thick, and an insertion groove 79 is provided around the outer peripheral surface of the flange 78B.
The seal portion 77 is formed in a shape in which a hanging end extends outwardly in a trumpet shape after hanging from the inner edge of the lower surface of the lower flange 78B.
Each packing 75 is mounted by inserting the peripheral edge of the corresponding connection opening 72 into the insertion groove 79 of the lower flange 78B. When the packing 75 is mounted, the packing body 76 rises from the upper edge of the connection opening 72. In addition, the seal portion 77 is disposed so as to protrude downward from the lower edge of the connection opening 72.
On the other hand, the upper flange 78A of the packing body 76 is fixed to the mouth edges of the respective openings 62 and 63 on the heat exchange chambers 45H and 45C side.

  Regarding the support structure of the lifting duct 70, tension coil springs 80 are provided at the four corners in the duct body 71, the lower end of each tension coil spring 80 is on the bottom side of the duct body 71, and the upper end is in the storage chamber 42 of the station 40. The lifting duct 70 is suspended and supported by being hooked on the ceiling surface. Then, the upward force is applied to the lifting duct 70 by the elastic force of the tension coil spring 80, and the lifting duct 70 always escapes to a position where the seal portion 77 of the packing 75 is higher than the upper surface of the cart 10. It is supported at the raised position (FIG. 9).

A cam shaft 90 is provided to push down the elevating duct 70 in the raised position against the urging force. As shown in FIG. 8, the cam shaft 90 is constituted by a pipe that is long in the front-rear direction. A cam plate 91 is provided at a position near the rear end of the cam shaft 90 and a position entering the center of the predetermined dimension from the front end, and the interval between the front and rear cam plates 91 is slightly shorter than the depth of the duct body 71. Dimensions. The cam plate 91 has a shape in which one side edge of a base portion having a substantially hexagonal shape is protruded in a mountain shape, and a roller 92 is attached to the protruding end.
On the other hand, as shown in FIGS. 6 and 7, the abutted plate 82 having a predetermined width with which a roller 92 provided on the cam plate 91 abuts at both front and rear end portions at the center width position of the bottom surface of the duct body 71. A stopper plate 83 is formed to rise at the left edge of each contacted plate 82 in a front view.

The cam shaft 90 described above is passed in the front-rear direction on the upper surface side of the duct body 71 at the center in the width direction of the duct body 71, the rear end is pivotally supported on the back wall side of the storage chamber 42, and the front end is It passes through a bearing hole 46 </ b> B (FIG. 1) provided at the lower end of the operation panel 46 and protrudes to the near side.
As shown in FIG. 8, an operation lever 95 is detachably attached to the protruding end in front of the camshaft 90 in a one-touch manner. Therefore, a mounting portion 93 is fitted to the protruding end of the camshaft 90, and the mounting portion 93 is formed in an arcuate cross section (a deformed cross section) in which the outside of the string in the circle is cut.
The operation lever 95 is formed in a long plate shape, and an arcuate cross-section fitting hole 96 into which the mounting portion 93 is tightly fitted is formed on the base end side.

  The length of the operation lever 95 (the length from the axial center to the tip of the cam shaft 90) is about 4 to 6 times the height of the cam plate 91, and the cam shaft 90 is correspondingly reduced by the lever action. It can be rotated by operating force. On the other hand, when the operating lever 95 is removed, a large operating force is required to rotate the camshaft 90, and the setting is such that it cannot be rotated by hand alone.

  The operation of the lifting duct 70 will be described. As shown in FIG. 9, when the elevating duct 70 is in the raised position, the cam shaft 90 rotates when the tip of the cam plate 91 faces obliquely downward to the right when viewed from the front and the roller 92 hits the abutted plate 82. Take a dynamic posture. The operation lever 95 is slightly tilted to the right from the standing posture. When the elevating duct 70 is in the raised position, as described above, the seal portion 77 of each packing 75 is escaped to a position higher than the upper surface of the cart 10 by a predetermined dimension.

When the operation lever 95 is rotated in the clockwise direction in FIG. 9 from this state, the front and rear cam plates 91 are rotated in the same direction around the axis of the cam shaft 90, and accordingly, the roller 92 at the tip of the cam plate 91 is rotated. Rolls on the abutted plate 82, and the lifting duct 70 is pushed down while extending the tension coil spring 80 against elasticity. The packing body 76 of the packing 75 is also extended.
As shown in FIG. 10, when the cam plate 91 is rotated until the cam plate 91 takes a posture facing directly downward, the lifting duct 70 is in the maximum lowered state, and the seal portion 77 of each packing 75 is connected to the cart 10. Are strongly pressed against the rims of the respective through holes 32 and 33 formed on the upper surface of the.

  When the operation lever 95 is further rotated in the same direction, as shown in FIG. 11, the roller 92 at the end of the cam plate 91 escapes slightly to the upper left, so that the elevating duct 70 receives the contraction force of the tension coil spring 80 and the roller 92 However, when the roller 92 has slightly escaped as described above, the roller 92 comes into contact with the stopper plate 83 and stops, and the further clockwise rotation of the operating lever 95 is stopped. When the abutted plate 82 is pressed against the roller 92 stopped by hitting the stopper plate 83, the further elevation of the lifting duct 70 is also stopped and held at the same position. This position is the lowered position of the elevating duct 70 and is slightly raised from the position where the elevating duct 70 is lowered to the maximum as described above, but the seal portion 77 of each packing 75 is formed on the upper surface of the cart 10. In addition, they are still in close contact with the mouth edges of the respective openings 32 and 33, that is, kept in a sealed state.

Then, an example of the usage pattern of the cold storage apparatus of this embodiment is demonstrated. First, hot and cold foods prepared for cooking and the like are divided and arranged in trays T, each tray T is stored in a frame cart 20, and the frame cart 20 is stored in a cart body 11 to constitute a cart 10. (Laying process). Next, the cart 10 is put into the station 40. At this time, as shown in FIGS. 9 and 12, the elevating duct 70 is brought to the raised position, and the seal portion 77 of the packing 75 is allowed to escape upward.
When the cart 10 is inserted into the storage chamber 42 of the station 40 from the front entrance 41 and stored in the normal position, the lifting duct 70 is moved to the tension coil spring 80 by rotating the operation lever 95 as shown in FIG. It is lowered to the lowered position against the urging force and locked to the lowered position. The operating lever 95 comes to the position of the chain line in FIG.

  When the elevating duct 70 is in the lowered position, the seal portions 77 of the packings 75 are brought into close contact with the rims of the upper surfaces of the corresponding passages 32 and 33 of the cart 10, and thereby the heat exchange chambers 45 </ b> H and 45 </ b> C of the station 40. The openings 62 and 63 opened on the lower surface and the openings 32 and 33 opened facing the ceiling walls of the warm room 30H and the refrigerator room 30C of the cart 10 are hermetically connected by the packing 75, Separate air circulation paths 65H and 65C each having a circulation fan 53 are formed between the first heat exchange chamber 45H and the warm storage chamber 30H and between the second heat exchange chamber 45C and the cold storage chamber 30C. .

  Subsequently, when the operation switch provided in the operation unit 46A of the operation panel 46 is turned on, the refrigeration mode is first executed. Here, if necessary, after the operation switch is turned on, the operation lever 95 at the position shown by the chain line in FIG. 12 is removed. Specifically, the operation lever 95 is pulled toward the front side, and the fitting hole 96 fitted in the mounting portion 93 at the protruding end of the cam shaft 90 is pulled out. After the operation lever 95 is pulled out, the turning operation of the cam shaft 90 cannot be substantially performed.

  In the refrigeration mode, the cooler 51 is activated in both the heat exchange chambers 45H and 45C, and cold air is circulated and supplied to both the warm chamber 30H and the cold chamber 30C, so that the hot food placed on the tray T is supplied. And cold food are refrigerated (chilled). More specifically, in this refrigeration mode, the temperature inside the refrigerator compartment 30H and the refrigerator compartment 30C are detected by temperature sensors (not shown), and the detected temperature is compared with a set temperature. Based on the opening / closing switching of the opening / closing valve and the on / off switching of the compressor 55, the operation and non-operation of the coolers 51H, 51C of the heat exchange chambers 45H, 45C corresponding to the chambers 30H, 30C are controlled. The interior temperatures of the storage room 30H and the refrigerating room 30C are maintained substantially at the set temperature.

When it reaches a predetermined time (set by a 24-hour timer) calculated backward from the distribution time of lunch, the mode is switched to the reheating mode. In the reheating mode, in the first heat exchange chamber 45H, the operation of the heater 60 is switched, while in the second heat exchange chamber 45C, the state where the cooler 51C is continuously operated is maintained. Thereby, warm air is circulated in the warm room 30H and the hot food is reheated, while cold air is continuously circulated and supplied to the cold room 30C for chilled storage.
When the reheating mode is executed in the warm room 30H, more specifically, a heating operation in which heating is maintained at a set temperature and a steaming operation in which the heater 60 is turned off and only warm air circulation is performed continuously. Done.

When the catering time is reached, the reheating mode ends, that is, the cold storage operation is stopped, and then the cart 10 is pulled out from the station 40. For this, if the operating lever 95 is removed, the fitting hole 96 is fitted into the mounting portion 93 at the protruding end of the camshaft 90, and the operating lever 95 is protruded from the camshaft 90 as shown by the chain line in FIG. Attach to the end.
When the operating lever 95 is rotated in the counterclockwise direction in FIG. 12 from the chain line position in FIG. 12, the lock is released first, followed by the restoring contraction force (biasing force) of the tension coil spring 80. Is returned to the raised position (state shown by the solid line in FIG. 9).

  From the state of FIG. 12, by pulling the cart 10 by grasping the handle 14, it can be taken out from the station 40, that is, the hot dishes are warmed, and the trays T respectively stacked in the state where the cold food is cooled are taken out. Can be used for serving. In addition, after taking out the cart 10 from the station 40, you may make it carry the cart 10 together, and when the arrangement place is near, take out the frame cart 20 from the cart main body 11, and carry the frame cart 20 alone. You can also use it like this.

  As described above, according to the present embodiment, the operation lever 95 for rotating the cam shaft 90 for driving up and down of the lifting duct 70 is configured to be attachable to and detachable from the cam shaft 90 with one touch. If the operating lever 95 is removed from the camshaft 90 after locking the lifting duct 70 in the lowered position prior to operation, the lifting duct 70 may be inadvertently returned to the raised position during operation. Is prevented. As a result, an appropriate school lunch can be provided.

The operation of removing the operation lever 95 is performed when the operation switch is turned on. However, since the operation lever 95 can be attached and detached on the surface of the operation panel 46 where the operation switch is arranged, the operation lever 95 has excellent usability. It becomes.
Since the one-touch attachment / detachment mechanism is constructed with a very simple structure such as fitting of the deformed sections by the fitting portion 93 of the protruding end of the cam shaft 90 and the fitting hole 96 of the base end portion of the operation lever 95, it is inexpensive. Yes.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, a change is made to the structure in which the operation lever 105 can be attached to and detached from the protruding end of the cam shaft 100 with one touch.
In the present embodiment, the operation lever 105 is formed by a pipe having a smaller diameter than the cam shaft 100. As a detachable structure, as shown in FIG. 13, a through hole 101 through which the base end portion of the operation lever 105 can be inserted is formed at the protruding end of the cam shaft 100. However, one end side of the through-hole 101 is a small-diameter hole 102A into which the camshaft 100 is fitted almost closely, and the other end side is a large-diameter hole 102B that is slightly larger.

  On the other hand, at the base end portion of the operation lever 105, a flange-like stopper 106 that hits the edge of the large-diameter hole 102B and a pair of elastic locking claws 107 that engage with the hole edge of the small-diameter hole 102A are provided. . The pair of elastic locking claws 107 are attached by spot welding or the like in such a manner that the respective claw portions 108 protrude to the outside through the slit 109, and can be elastically deformed in a direction (opening / closing direction) in which both the claw portions 108 come in contact with and separate from each other. It has become. However, the large-diameter hole 102B can pass through in a state where both the claw portions 108 are open.

When the operation lever 105 is mounted, as shown by an arrow a in FIG. 13, when the base end portion of the operation lever 105 is inserted into the large diameter hole 102B, both elastic locking claws 107 are continuously closed while the small diameter hole 102A is closed. Is inserted. When the stopper 106 hits the edge of the large-diameter hole 102B, the pushing operation is stopped. At this time, as shown in FIG. 14, the claw portions 108 of the both elastic locking claws 107 pass through the small-diameter hole 102A. The locking claw 107 is opened by restoring elasticity, and both the claw portions 108 are locked to the hole edge of the small diameter hole 102 </ b> A, whereby the operation lever 105 is attached to the protruding end of the cam shaft 100 so as not to be detached.
When the operation lever 105 is removed from the state shown in FIG. 14, when the operation lever 105 is pulled in the direction of the arrow b in FIG. It can be pulled out while passing through 102A and passing through the large-diameter hole 102B even after opening.
The operation lever 105 can be easily attached and detached, and the holding force at the time of mounting is excellent.

<Embodiment 3>
A third embodiment will be described with reference to FIG. In the third embodiment, a function is added to the first embodiment to stop the operation when the elevating duct 70 returns to the raised position due to an inadvertent operation of the operation lever 95 or the like during the operation.
Therefore, a duct detection unit 85 that detects whether or not the elevating duct 70 is in the lowered position is provided. As shown in FIG. 15, the duct detection unit 85 includes a magnet 85 </ b> A and a magnetic proximity sensor 85 </ b> B. The magnet 85 </ b> A is provided on the inner surface on the back side of the duct body 71, and the magnetic proximity sensor 85 </ b> B On a bracket (not shown) protruding from the back panel, it is arranged corresponding to the lower side of the magnet 85A.

In a state where the lifting duct 70 is locked at the lowered position (see FIG. 11), the magnetic proximity sensor 85B senses the magnetism of the magnet 85A and is turned on. As shown in FIG. It turns off when it cannot sense magnetism.
The magnetic proximity sensor 85B constituting the duct detection unit 85 is connected to the input side of the operation control unit 86 together with the operation switch. When the operation switch is turned on, that is, during operation of the refrigeration apparatus, the magnetic proximity sensor 85B is turned off. An operation stop signal is output to stop the operation.

  When such an operation stop function is provided, if the operation duct 95 is removed from the camshaft 90 after the operation switch 95 is turned on after the elevating duct 70 is locked in the lowered position, the operation is inadvertently performed during operation. It is avoided that the duct 70 is returned to the raised position, and therefore the operation is prevented from being interrupted accidentally.

<Related technologies>
16 to 18 show related technologies. In this related technique, as shown in the X part of FIG. 1, the connection structure of the connecting plate 110 passed between the upper sides of the left and right frames 23 constituting the cart body 11 is devised.
As shown in FIG. 16, the details of the portion X are formed with a mounting plate 111 bent at a right angle at the end of the connecting plate 110, and the mounting plate 111 has two slits 112 cut out from the lower edge. The mounting plate 111 is fastened and fixed by a screw 120 while being positioned and applied to the inner surface of the upper side while passing through a pin 113 standing on the inner surface of the upper side of the frame 23.

Here, as shown in FIG. 17, the screwing portion has a structure in which an insertion hole 115 of a screw 120 is opened in the mounting plate 111 and a screw hole 116 is formed concentrically on the inner surface of the frame 23. A base end side male screw portion 121 and a front end side male screw portion 122 are formed on the shaft portion of the screw 120 so as to be spaced apart from each other with the screwless portion 123 interposed therebetween.
When the screw 120 is inserted into the insertion hole 115 of the mounting plate 111 and applied to the screw hole 116 and then screwed in, the base-side male screw part 121 continues from the tip-side male screw part 122 to the screw hole 116. As shown in FIG. 17, the screwing is stopped when the head 124 hits the edge of the insertion hole 115, and the mounting plate 111 is fixed to the inner surface of the frame 23.

Since the cart body 11 is transported and used, the screws 120 may gradually loosen due to vibration or the like. Even if the screw 120 is further loosened, the screw 120 is prevented from further loosening when the non-threaded portion 123 reaches the screw hole 116 as shown in FIG. Therefore, the screw 120 does not fall.
When used in the state of FIG. 18, the screw 120 is shaken due to vibration or the like and an abnormal noise is generated, so that the screw 120 is retightened (tightened).

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) The one-touch attachment / detachment mechanism is not limited to the ones illustrated in the first and second embodiments, and in other words, as long as the operation lever can be detachably attached to the camshaft without using a tool. It may be the structure.
(2) The mounting position of the operation lever is not limited to the surface of the operation panel exemplified in the above embodiment, but the outer surface of the station, etc. There may be.
(3) Although the said embodiment illustrated the thing of the form which expands and contracts a ventilation path in the shape of a bellows, as long as expansion / contraction of an axial direction is accept | permitted, other forms, such as simply folding, may be sufficient.
(4) Although the said embodiment illustrated what can separate a cart into a cart main body and a frame cart, the cart of the structure where both were integrated so that separation was impossible may be sufficient.

  T ... Tray 10 ... Cart 24 ... Partition wall 30H ... Warm room 30C ... Refrigeration room 32, 33 ... Storage room side entrance 40 ... Station 41 ... Entrance / exit (front opening) 45H ... First heat exchange chamber 45C ... Second heat Exchange chamber 46 ... Operation panel 51H ... First cooler (cooling means) 51C ... Second cooler (cooling means) 60 ... Heater (heating means) 62, 63 ... Heat exchange chamber side port 65H, 65C ... Air circulation path DESCRIPTION OF SYMBOLS 70 ... Elevating duct 75 ... Packing 76 ... Packing main body (ventilation path) 80 ... Tensile coil spring (elastic member) 83 ... Stopper plate (locking part) 85 ... Duct detection part 85A ... Magnet 85B ... Magnetic proximity sensor 86 ... Operation control part DESCRIPTION OF SYMBOLS 90 ... Cam shaft 91 ... Cam plate 92 ... Roller 93 ... Mounting part 95 ... Operation lever 96 ... Fitting hole 100 ... Cam shaft 101 ... Through-hole 102A ... Small Hole 102B ... large diameter 105 ... operating lever 106 ... stopper 107 ... elastic latching pawls 108 ... pawl portion

Claims (5)

A cart made of a heat-insulating box that is partitioned into a warm room and a cold room by a partition wall, and a tray passes through the partition wall and is stored in a plurality of stages in the form of the warm room and the cold room; ,
The cart is housed so that it can be taken in and out from the front opening, and a first heat exchange chamber equipped with a cooling means and a heating means and a second heat exchange chamber equipped with a cooling means are formed side by side on the ceiling wall in the horizontal direction. Are provided, and
When the cart is stored in the station, separate air circulation paths are formed between the first heat exchange chamber and the warm room and between the second heat exchange chamber and the cold room. In addition, these air circulation paths are configured by connecting a heat exchange chamber side outlet and a storage chamber side outlet provided facing the lower surface of the ceiling wall of the station and the upper surface of the cart. As well as
A refrigeration apparatus provided with control means for controlling the operation of the cooling means and the heating means,
On the lower surface side of the ceiling wall of the station, a duct provided with an expandable / contracting air passage connecting the opposing heat exchange chamber side passage and the storage compartment side passage, the upper end of each of the air passages It is arranged so that it can be raised and lowered in a form fixed to the heat exchange chamber side entrance,
The duct is moved up and down between a lowered position where the lower end of each ventilation path is in close contact with the storage chamber side outlet and an elevated position where the lower end of each ventilation path is spaced above the storage chamber side outlet. A lifting mechanism is provided,
The elevating mechanism includes a cam that is lifted and biased by an elastic member and supported by the elastic member, and has a cam that contacts the duct, and is pivoted about an axis to resist the biasing force of the duct. A cam shaft for lowering is provided, and a lock portion for locking the cam shaft at the lowering operation position is provided;
An refrigeration / heating apparatus according to claim 1, wherein an operating lever for rotating the camshaft about its axis is detachably attached to an end of the camshaft by a one-touch attaching / detaching mechanism. At the upper position of the front opening of the station, an operation panel provided with a driving operation switch or the like is stretched so as to cover the duct, and the camshaft is rotatable in a form penetrating the operation panel. The refrigeration / heating apparatus according to claim 1, wherein the operation lever is detachably attached to an end portion of the cam shaft that protrudes toward the front of the operation panel. In the one-touch attachment / detachment mechanism, the end portion of the cam shaft is formed in an odd-shaped cross section, and a fitting hole having an odd-shaped cross section is fitted in the base end portion of the operation lever in alignment with the end portion. The refrigeration / heating apparatus according to claim 1 or 2, characterized by being formed. The one-touch mechanism is formed with a through-hole through which the base end of the operation lever can be inserted at the end of the cam shaft.
The base end portion of the operation lever is configured by being provided with a stopper that hits one edge of the through hole and a locking claw that elastically locks to the other edge of the through hole. The refrigeration / heating apparatus according to claim 1 or 2, wherein A duct detector for detecting whether or not the duct is in the lowered position;
The operation control part which stops an operation | movement when the said duct detection part detects that the said duct is not in the said descent | fall position during the driving | running | working of the said refrigerator is provided. The cold storage apparatus as described in any one of thru | or 4 thru | or 4.

Images