JPH09303946A - Movable cold storage chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate and ensure the loading and unloading of a movable cold storage chamber onto and from a vehicle as well as the setting of the same while improving the operability of a protecting rack for preventing the collapse of mixed-cargoes onto the cold storage chamber. SOLUTION: A protecting rack (b) is raised up by vertical movement and pivoting by engaging pins 61 with slots 64 to keep the same under suspended condition. The raised-up and suspended condition is fixed by engaging a retaining piece 62 with a retaining adapter. Casters C are attached to the four corners of a rectangular retaining member 1, hang from a box body A by a parallel link mechanism. The retaining member 1 is moved vertically by a handle B through the parallel link mechanism to appear the casters C out of the bottom surface of the box body A or disappear the same from the bottom surface of the box body A. When the caster C is disappeared from the bottom surface of the same, the bottom surface of the box body A is abutted against a floor surface whereby the movement of the cold storage chamber is precluded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile cool box in which casters are provided on the lower surface of a box body having a cool box, which is transferred on a bed of a vehicle.

[0002]

2. Description of the Related Art Today, with the improvement of eating habits, various foods (commodities) are required to be fresh, and even in home delivery, various commodities are delivered to each home in a cold (including frozen) state. ing. At this time, the delivery vehicle is equipped with a cool box for keeping the product in a cold state.

This cool box A'is usually placed on the front part of the loading platform of a wagon with both sides open, as shown in FIG.
At this time, a protective fence b is provided in the cool box A'to prevent the goods (baggage) P at the rear of the cargo box from moving to the cool box A '.

As shown in FIG. 15, the conventional protective fence b has a downward U-shape, and both ends thereof are inserted into the support cylinder 1 on the side of the cool box A'and the pins 2 are inserted thereinto. The projecting state of the solid line in the figure (protection state) and the stored state of the chain line in the figure are maintained.

[0005]

When sliding the protective fence b up and down, both ends of the protective fence b must be put in and taken out in parallel with the support cylinders 1 and 1; Sliding while maintaining the state is extremely difficult and very troublesome. Also, the operation of inserting the pin 2 must be inserted into a small hole, which is cumbersome, and the protection fence b rattles due to the gap between the hole and the pin and the guard fence and the support cylinder, which rattles while the vehicle is running. There is also a problem that appears.

Under the above circumstances, it is an object of the present invention to make it possible to convert the protection state and the storage state by other means instead of the sliding movement of the protection fence.

[0007]

In order to solve the above-mentioned problems, the invention as set forth in claim 1 is, in a mobile cooler equipped with the above-mentioned protective fence, a protective fence on the side surface of the box body,
A structure in which the lower part of both ends is rotatably mounted, and the protective fence is fixed so as to project above the upper surface of the box body in a standing state and stored and fixed to the side surface of the box body in a suspended state. Is adopted.

A second aspect of the present invention is a specific embodiment of the rotation support structure at the lower end portions of both ends of the protective fence. Supporting plates in the vertical direction are provided so as to project on the side surfaces of the box body corresponding to the lower ends of both ends of the protective fence, and pins are provided laterally on the upper surface of one side of the supporting plate, and the same as the pins on the lower side edges of the supporting plate. Provided with laterally-direction locking pieces, and vertically forming long holes in which the pins fit and slide at the lower ends of both ends of the protective fence, and the locking pieces are provided near both ends of the long holes. When the protection fence is in the upright state, the pins engage with the upper ends of the elongated holes, and the lower protrusions engage with the locking pieces. When the protection fence is suspended and the protection fence is suspended, the pin engages with the lower end of the elongated hole and the upper protrusion engages with the locking piece to suspend the suspension. In this state, a structure is adopted in which the side surface of the box is stored and fixed.
According to the above configuration, the rotation of the protective fence is performed by rotating the pin in the long hole as an axis, and the rising and the suspended state are fixed by the pin, the long hole end, and the locking piece. Since it is maintained by engaging at two points with the protrusion, rattling of the protective fence is also strongly suppressed.

The invention of claim 3 is another embodiment of the rotation support structure at the lower end portions of both ends of the protective fence. A bearing is provided on the side of the box that corresponds to the bottom of both ends of the protective fence, the shaft hole of this bearing is aligned with the shaft hole at the bottom of both ends of the protective fence, and pins can be inserted into both shaft holes to freely rotate the protective fence. Mounted on the protective fence, and insert a spring for urging the protective fence in the axial direction of the pin between the shaft hole portion and the bearing, and when the protective fence is in a standing state or in a suspended state. At this time, a suspension piece for suspending the protective fence by the biasing force of the spring is vertically separated from the bearing and is provided so as to be suspended on the protective fence surface on the opposite side to which the spring is inserted. .

According to the above construction, when the protection fence is raised from the suspension fixed state and projected above the upper surface of the box, the protection fence starts to rotate like a chain line against the biasing force of the spring. The spring bends and the protective fence rotates beyond the lower suspension piece, and then normally rotates without resisting the biasing force of the spring. It hits the stop, but at this point, if it is pushed harder, the spring will bend and the guard will move axially of the pin and will fit into the suspension and be suspended. When suspended, the protective fence is constantly pressed against the suspension piece side by the spring, so that an unpleasant vibration noise due to vibration during transportation can be prevented.

The invention according to claim 4 is intended for the convenience of loading and unloading the cool box on the bed of a vehicle. A caster is provided at the bottom of the box, and the caster is attached to the bottom of the box. It is configured so that it can be moved up and down. With the above configuration, when the cool box is placed on the floor, all the casters are stored at a position above the bottom surface of the box body, and the bottom surface of the box body directly contacts the floor surface to keep the cool box. Will not move. Further, when moving the cool box, the casters can be pushed out from under the box to facilitate the movement of the cool box and the loading and unloading of the cool box.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A in FIG. 1 is a cool box body A (hereinafter, also simply referred to as "box body A") for storing products such as refrigerated products.
The casters C for moving are provided at the four corners of the bottom surface of the box A, and the handles B for pushing and pulling the box A at the time of moving are provided on one surface of the box A and the side surface of the box A. Protective fence b is provided at. The height of the protective fence b is appropriately set in consideration of the allowable amount of start-up protrusion in the state of being placed on the bed of the vehicle, the degree of prevention of the collapse of the load, and the possibility of storage on the side surface of the box body in the suspended state.

A lid D is placed on the upper surface of the box A, and the lid D is divided into a front lid D ₁ and a rear lid D ₂ at the center position of the box A in the front-rear direction. Both lids D ₁ and D ₂ are connected by a hinge E provided on the side surface of the lid D, so that the lid D can be opened and closed from both front and rear sides. Reference numeral F denotes a handle hole for opening and closing the rear lid D ₂ , and although not shown in the drawing, the front lid D ₁ is also provided with a handle hole at a position symmetrical to the rear lid D ₂ . FIG. 2 shows a state in which the rear lid D ₂ is opened.

As shown in FIG. 3, this cool box body A is
The box side wall A ₁ , the box bottom plate A ₂ , the lid D, and the front and rear walls (not shown) all have a thick structure in which the heat insulating material W is incorporated. G is a corrugated sheet, and this corrugated sheet G and the side wall A of the box body
_A regenerator material H and a plate-shaped evaporator I for cooling are enclosed between the inner surfaces of ₁ . The corrugated plate G serves as a heat insulating wall for separating the stored material and the cold storage material H.

A well-known refrigerating device J shown by a rectangular parallelepiped in the drawing is provided on the bottom surface of the box A, but its internal structure is not the main subject of the present invention, so the description thereof will be omitted and its spatial arrangement will be omitted. Stop to show. The width direction of the refrigerating device J (see FIG.
The caster holding members 1 to which the casters C are attached are arranged along the longitudinal direction of the box A at both sides. The caster holding member 1 is made of channel steel, and the caster C is fixed inside the opening of the channel steel by welding.

FIG. 3 shows a state in which the caster C is used. The caster C projects downward from the bottom surface J ₁ of the refrigeration system J, and the wheel surface of the caster C is in contact with the floor surface K. ing. The caster C is movable in the vertical direction in the figure as shown below, and moves upward when not in use, and the lower surface of the wheel is located above the bottom surface J _{1 of the} refrigerating device J, and The bottom surface J _{1 of the} device J comes into contact with the floor surface K. In addition, M is a gasket for maintaining a sealed state between the lid D and the upper edge of the box side wall A ₁ .

Next, the mounting structure of the casters C of this cool box will be described with reference to FIGS. 4, 5 and 6, and the caster holding members 1 on both sides of the refrigerating machine J and the following various types of attachments to them. Since the members are symmetrical in the width direction of the box A, only one of them will be described.

4 and 5 show the caster holding member 1 mounted on the rear side of the box A. As shown in FIG. A bearing 2 made of grooved steel is fixed to the corner of the bottom surface of the box A by welding. A rotating member 3 made of grooved steel is fitted in the bearing 2 and is rotatably attached by a pin P ₂ .
The caster holding member 1 is formed of groove-shaped steel whose inner dimension in the width direction (inner dimension of the back plate) is larger than the width dimension of the groove-shaped steel of the rotating member 3, and a predetermined distance from the edge of the back plate. Is cut out. The caster holding member 1 has a notch portion fitted into an end portion of the rotating member 3, and then a pin P ₁ is inserted and is rotatably attached around the pin P ₁ .

The rotating member 3 has a projecting portion 23 as shown in FIG. 5, and one end of a connecting member 4 made of grooved steel is rotatably connected to the end portion thereof by a pin P _41. The other end of the connecting member 4 is rotatably connected to a rotating arm 5 made of grooved steel by a pin P ₄₂ .

The rotating arm 5 is rotatably attached to a grooved steel bearing 6 provided on the back surface of the box A by a pin P ₅ , and this bearing 6 is used for locking the rotating arm 5 described below. The L-shaped steel 8 provided with the groove 7 is fixed to the front surface side of the mounting surface of the box body A by welding. This L-shaped steel 8 is attached to the box A on one side plate, and the other side plate 28 is attached to the box A.
A groove 7 having a predetermined depth is provided from the upper edge of the side plate 28 that protrudes at a right angle from the back surface.

On the other hand, an elongated hole 9 is provided in one side plate 25 of the grooved steel of the rotating arm 5, and the elongated hole 9 and FIG.
The lock bar 10 is inserted over a long hole provided in a pair of rotation arms (see FIGS. 1 to 3) not shown in FIG. The long hole 9 has a length dimension which is longer than the entire length of the groove 7 of the L-shaped steel 8 by the diameter of the lock bar 10 or more. The long hole 9 and the groove 7 form a box body when the rotating arm 5 is upright. The groove width and the hole width overlap in the front-back direction of A, and the long hole 9 and the groove 7
The bottom edges of are aligned.

Therefore, if the lock bar 10 is moved downward along the elongated hole 9 in this state, the lock bar 10 is fitted into both of the lower end of the elongated hole 9 and the lower end of the groove 7, and the rotating arm is moved. The upright state of 5 is locked. To release this locked state, conversely, the lock bar may be pulled up along the long hole 9 (and the groove 7) and the lock bar 10 may be taken out from the groove 7. The upper ends of the rotating arm 5 and a pair of rotating arms not shown in FIG. 5 are connected and fixed by a handle B (see FIGS. 1 to 3).

As shown in FIGS. 4 and 5, the vicinity of the end of the connecting member 4 on the side of the rotating arm 5 is inflated outwardly because both ends of the inserting pin P ₅ for mounting the rotating arm 5 are formed. This is to allow the caulking part to escape.

FIG. 6 shows the caster holding member 1 on the front side of the box A.
Shows the installation of. A rotating member 53 is rotatably attached by a pin P ₁₁ to a grooved steel bearing 52 provided at a corner of the bottom of the box A, and an end portion 51 of the caster holding member 1 is rotatable on the rotating member 53. The configuration of the bearing 52 and the rotating member 53 on the front side in the box width direction is different from that on the rear side, but the configuration is largely shifted inward from the side surface of the box. is there. At the end 51 of the caster holding member 1, the upper surface (the groove steel back plate) is formed like the rear side.
There is no cutout in the caster holding member 1
Instead of being fitted into the caster holding member 1, the caster holding member 1 is provided so as to be adjacent to the caster holding member 1 in the width direction. Then, the left and right rotating members 53, 53 and the caster holding members 1, 1 are composed of a single shaft 54.
Connected by.

Further, the front rotary member 53 is not connected to the rotary arm like the rear side, but is a shaft hole 55 for mounting the bearing 52 and a shaft for mounting the caster holding member 1. It has only holes 56. Both shaft holes 55, 56
Is arranged so that the turning radius of the turning member 53 is equal to that on the rear side, and is the same as the distance between the corresponding shaft holes 35 and 36 (see FIG. 5) of the turning member 3 on the rear side. Further, the distance between the shaft holes 35 and 55 and the distance between the shaft holes 36 and 56 are also equal. That is, the front and rear rotating members 53 and 3 and the caster holding member 1 form parallel links with the bottom surface of the box A, as shown in FIG. 7A.

The caster C of the cool box having this structure is operated as follows. When the caster C is used to move the cool box, the above-mentioned FIG. 3 (or FIGS. 1 and 2) and FIG. 7 (a) are used. ), The caster C is a refrigerating device J.
Protrudes from the bottom J ₁ downward, abuts on the wheel floor K. At this time, the rotating arm 5 is, as described above,
Since the lock bar 10 is fitted into both of the lower end of the long hole 9 and the lower end of the groove 7 and is locked in an upright state,
The cool box can be moved by pushing and pulling the portion of the handle B.

In order to keep the cool box at a desired place, first, as shown by the arrow in FIG. 8 (a), the long hole 9 of the rotating arm 5 and the groove 7 of the L-shaped steel (see FIG. 5). The lock bar 10 which is fitted into the groove is slid upward along the long hole 9 so that the groove 7
To release the engaged state. This allows the rotating arm 5 to rotate.

With the rotating arm 5 being rotatable, as shown in FIG. 8B, a handle B (see FIGS. 1 and 2).
When the rotating arm 5 is rotated by operating, the rotating arm 5 pushes the connecting member 4 in its longitudinal direction, and the other end of the connecting member 4 presses the connecting portion of the rotating member 3. To do. The rotating member 3 pushed by the connecting member 4 rotates in the clockwise direction in the drawing, the connecting portion with the caster holding member 1 at the other end moves upward, and the end portion 21 of the caster holding member 1 rises. And caster holding member 1 to the left in the figure, that is,
It acts so as to push it toward the front side of the box A.

As a result, the rotating members 3 and 53 (see FIG. 7).
And the other end 51 of the caster holding member 1 (see FIG. 7) by the parallel link mechanism constituted by the caster holding member 1.
Pushes the other end of the rotating member 53 (see FIG. 7) on the front side of the cool box to rotate it, and the caster holding member 1 as a whole rises. Therefore, the caster C attached to this also rises, and as shown in FIGS. 8 (c) and 7 (b), the wheel surface of the caster C is completely separated from the floor surface K, and instead, the refrigeration system J The bottom surface J ₁ comes into contact with the floor surface, and the cold storage is immobile. At this time, the upper surface of the caster holding member 1 contacts the bottom surface of the cool box body A.

Next, the lock bar 10 is provided in the lock notch groove 11 provided on the inner side wall of the connecting member 4.
Is inserted to lock the rotary arm 5 to fix the caster holding member 1, that is, the caster C.

When the caster C is used, in order to stabilize the parallel link mechanism, the horizontal position of the hole 36 attached to the caster holding member 1 of the rear turning member 3 shown in FIG. It is desirable to be located behind the perpendicular line passing through the hole.

9 to 11 show a structure for supporting both ends of the protective fence b according to the second embodiment of the present invention. As shown in FIGS. 1 and 10, L-shaped supports are provided on both sides of the box A. The metal fitting 60 is screwed, and a pin 61 is provided on the upper portion of the standing piece and a locking piece 62 is provided on the lower portion. Metal fittings 63 having a U-shaped cross section are welded to both ends of the protective fence b, and the pins 61 are attached to the metal fittings 63.
An elongated hole 64 is formed in which is fitted and slid.

Therefore, the protective fence b has pins 6 at both ends thereof.
By fitting the elongated hole 64 into the support member 1, the support member 60 is rotatably supported by the support fitting 60 and is fixed in the support fitting 60 in a downward state as shown in FIG. At this time, as shown in FIG. 7C, the protective fence b is held by the pressing piece 65 and the locking piece 62 via the metal fitting 63 and is not loose.

In order to raise the protective fence b from this state (to bring it into a protruding state), as shown in FIG. 11 (a), the protective fence b is slightly raised and the metal fitting 63 is removed from the locking piece 62. After that, it rotates upward. Next, as shown in (b) of the figure, with the pin 61 positioned at the lower end of the elongated hole 64, the pin 61 is swung up from the chain line to the solid line, and is started up. Then, the lower end is inserted between the holding plate 65 and the locking piece 62. This state is shown in FIG. 1, and the protective fence b projects from the upper surface of the box A and its lower end is
Locking of pin 61 and long hole 64 and locking piece 62 and pressing plate 6
It is supported at two points by holding 5 and is supported without rattling, as in the suspended state.

From this protruding state to the suspended state,
The reverse operation to the above is performed in the direction of the arrow in FIG.
In addition, in this embodiment, the "projection" in the claims is defined as "upper and lower portions of the metal fitting 63".

This embodiment has been described above. With the caster C protruding from the bottom surface of the box A (refrigerating device J), the handle B is held to move the cool box to an arbitrary position. At this time, it is preferable that the protective fence b be in a suspended state on the side surface of the box body. In the above-described embodiment, the shape of the protective fence b is a downward U shape, but the shape is not limited to such a shape, and in other words, another load placed on the vehicle collapses on the box A of the cool box. Any shape may be used as long as it has such a function as to prevent the pin 61 from rotating.

12 and 13 show an embodiment according to claim 3. Bearings 70 having laterally provided shaft holes 71, 71 at substantially the center of the grooved steel are attached to the side surfaces of the box A corresponding to the lower portions of both ends of the protective fence b by bolts. Between the shaft holes 71, 71 of the bearing 70, the lower ends of both ends of the protective fence b are fitted so that the axial holes 72 formed in the parts are aligned with each other, and between the bearing 70 and the protective fence b. The pin 73 is fitted through the spring 74 and is rotatably attached, so that the protective fence can be raised or suspended. Reference numeral 76 is a washer for smoothing the rotation of the protective fence, and 77 is a snap pin for holding the fitted state of the pin 73.

At both ends of the grooved steel forming the bearing 70, suspension pieces 75 for fixing the protective fence b in a raised state and a suspended state are provided on the opposite side to which the spring 74 is inserted. There is. The positional relationship in which the suspension piece 75 and the lower ends of both ends of the protective fence b are in contact with each other is such that when the protective fence b is started or suspended, the suspension piece 7 is placed outside the center line of the protective fence b.
5 should be in contact.

In FIG. 12, the protective fence b is in a suspended state, but when the protective fence b is started from this state, the suspended protective fence b is resisted by the biasing force of the spring and is indicated by a two-dot chain line. When it is lifted in the direction of, the spring 74 is pushed down and goes over the top of the suspension piece 75 to be freely rotated. Immediately before the rising is completed, the protective fence b is provided with a suspension piece 75 on the upper side.
Resistance at this time (biasing force of the spring 74)
When the protective fence b is pushed against the suspension piece 75 side against the spring, the spring 74
Is bent, the protective fence b moves in the axial direction, crosses the top of the suspension piece 75, and is fixed. In order to move the protective fence b from the rising state to the suspended state, the operation reverse to the above operation may be performed. In the above-described embodiment, the shape of the protective fence b is a downward U shape, but the shape is not limited to such a shape, and in other words, another load placed on the vehicle collapses on the box A of the cool box. Any shape may be used as long as it has such a function as to prevent the pin 73 from rotating.

FIG. 14 shows a state in which the mobile cool box according to the present invention is placed on the bed of a vehicle, and the handle B of the box A of the mobile cool box placed on the vehicle is tilted and suspended. are the casters C attached via a caster holding member 1 under the box a is housed above the bottom J ₁ of the refrigeration system J, bottom J ₁ of the refrigeration system J is the floor of the vehicle It will be placed directly and will not move easily. In addition, the protective fence b prevents other loads placed in the rear of the vehicle in the startup state from collapsing on the cool box.

[0041]

The present invention is constructed as described above, and by employing the turning mechanism for raising or suspending the protective fence, the operation thereof is facilitated and the vehicle is running. The rattling of the protective fence can be suppressed.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment.

FIG. 2 is a perspective view showing the same embodiment.

FIG. 3 is a sectional view taken along line XX of FIG. 1;

FIG. 4 is a side view of a main part of the same embodiment.

FIG. 5 is an exploded perspective view of essential parts of the same embodiment.

FIG. 6 is an exploded perspective view of essential parts of the same embodiment.

FIG. 7 (a) is an operation diagram when the caster is used, and (b) is an operation diagram when the caster is not used.

8A and 8B are explanatory views of the operation of the caster, where FIG. 8A is a pulling start point, FIG. 8B is a pulling step, and FIG. 8C is a pulling end point.

FIG. 9 shows a mounting portion of a protective fence, (a) is a plan view,
(B) is a front view, (c) is a right side view

FIG. 10A is an exploded perspective view of a mounting portion of the protective fence, and FIG. 10B is a perspective view of an end portion of the protective fence.

FIG. 11 is an explanatory view of the action of the protective fence, (a) is a suspended state, and (b) is a raised state.

12A is a front view of another embodiment, and FIG. 12B is an explanatory view of the same operation.

FIG. 13 is a plan view of the same.

FIG. 14 is an explanatory diagram of use of the embodiment.

FIG. 15 is a perspective view of a conventional example.

[Explanation of symbols]

 A cool box box B handle C caster D lid b guard fence 1 caster holding member 2, 6, 52, 70 bearing 3, 53 rotating member 4 connecting member 5 rotating arm 7 groove 8 L-shaped steel 9 long hole 10 lock bar 60 L-shaped support metal fittings 61, 73 Pins 62 Locking piece 63 Locking metal fittings (upper and lower projections) 64 Long hole 71 Shaft hole (bearing) 72 Shaft hole (guard fence) 74 Spring 75 Suspending piece 76 Washer 77 Snap pin

Claims (4)

[Claims] 1. A mobile cool box having casters C provided on a lower surface of a box body A provided with a cool box, which is placed on a bed of a vehicle and transferred, and a guard fence is provided on a side surface of the box body A. b is rotatably mounted at the lower ends of both ends, and its protective fence b is fixed so as to project above the upper surface of the box A in a standing state, and stored and fixed to the side surface of the box A in a suspended state. A mobile cool box characterized by being configured as described above. 2. A vertical support plate 60 is provided so as to project on the side surface of the box A corresponding to the lower ends of both ends of the protective fence b, and a pin 61 is provided laterally at the upper part of one surface of the support plate 60. On the lower side edge of the support plate 60, a locking piece 62 that is laterally oriented in the same direction as the pin 61 is provided, and at the lower ends of both ends of the protective fence b, there are vertically elongated holes 64 in which the pin 61 fits and slides. Each of them is formed, and upper and lower projections 63 that engage with the locking pieces 62 are provided near both ends of the elongated hole 64. When the protective fence b is in a standing state, the pin 6
When 1 is engaged with the upper end of the elongated hole 64, and the lower projection 63 is engaged with the locking piece 62 to fix the rising state and the protective fence b is suspended. The pin 61 engages with the lower end of the elongated hole 64, and the upper protrusion 63 engages with the locking piece 62 to fix the suspended state. The mobile cool box according to claim 1, wherein the rotary cool box has a rotating support structure. 3. A bearing 70 is provided on the side surface of the box A corresponding to the lower ends of both ends of the protective fence b, and the shaft hole 71 of this bearing 70 and the axial hole 72 at the lower ends of both ends of the protective fence b are made to coincide with each other. 71,
The protection fence b is rotatably attached by inserting the pin 73 into the protection rod 72, and between the shaft hole 72 portion of the protection fence b and the bearing 70,
When a spring 74 for urging the protective fence b in the axial direction of the pin 73 is inserted to bring the protective fence b into the startup state, or
When suspended, the protective fence b is urged by the urging force of the spring 74.
2. The mobile cool box according to claim 1, wherein a suspending piece 75 for suspending is secured so as to be separated from the bearing and to be suspended on the protective fence surface on the opposite side into which the spring is inserted. 4. The caster C is capable of moving up and down with respect to the bottom surface of the box A, and when the caster C is not used, all the casters C are positioned above the bottom surface of the box A. The mobile cool box according to claim 1 or 2, wherein the cool box is housed and the bottom surface of the box A is brought into contact with the floor surface K so that the cool box does not move.